Height adjustment mechanism

Technical field of height adjustment mechanism

[0001] The present invention relates generally to tables, and in particular to tables that may include a height adjustment mechanism.

Background technique

[0002] Many different types of tables are known and used for a variety of different purposes. For example, existing tables may include legs that are pivotally attached to the table top, and the legs may be movable between a use position, where the legs extend outwardly from the table top, and a storage position, where the legs extend outwardly from the table top, and position, the legs are folded against the lower portion of the table top. Existing tables with relatively large table tops and folding legs are often referred to as "banquet tables" and these tables are often used in auditoriums, banquet halls, conference centers, hotels, schools, churches, and other places where large groups of people gather. When the table is no longer needed, the legs can be moved to the storage position and the table can be moved or stored.

[0003] Existing banquet tables with moveable legs may allow for more convenient table storage. However, table tops for many existing banquet tables with moveable legs retain their size and shape. For example, many known banquet tables have lengths between 6 feet and 10 feet and widths between 3 feet and 4 feet. As a result, many existing banquet tables require a large storage area even when the legs are in the stowed position. Such large storage areas can be particularly problematic for larger venues such as hotels, schools, and churches, as a considerable number of tables may have to be stored. Therefore, a lot of space may be required to store the table. Additionally, smaller venues such as restaurants, offices, and homes may use one or more existing banquet tables. These smaller venues may use tables less frequently, such as during special occasions. Existing banquet tables are often too bulky and difficult to conveniently use and store in such smaller venues, even with the legs folded. Consequently, larger and smaller venues often need to rent and/or borrow banquet tables when needed. Disadvantageously, this process of renting and/or borrowing banquet tables can be inconvenient, time-consuming, and expensive.

[0004] Existing banquet tables are also often difficult to move or transport from one location to another. For example, due to the length of many existing banquet tables, it is often difficult for a single person to move the table. Additionally, the extended length of existing banquet tables may prevent the table from being transported in the trunk or back seat of a typical passenger car. Therefore, existing banquet tables may have to be transported by truck, trailer or oversized vehicle such as a sport utility vehicle. These and other factors can make existing banquet tables difficult, time consuming and expensive to move.

[0005] It is also known to construct tables that can be folded in half. Existing tables that fold in half may include a table top having two sections pivotally connected by a hinge. The two sections are usually the same size and shape, and the hinge is usually located in the center or middle of the table top. The two sections of the table top are movable between an unfolded position, in which the sections of the table top are generally aligned in the same plane, and a folded or collapsed position, where the sections are generally aligned in the same plane. Positioned next to each other for storage. Additionally, some tables may include extendable or retractable legs. Extension and retraction of the legs may allow the legs to be stored when the table is folded or folded. In addition, the extension and retraction of the legs allows the table to be used at different heights. For example, a table can be used for children when the legs are retracted to bring the table top closer to the surface on which the table rests, such as the floor or ground. In addition, the table can be used for adults when the legs are extended to move the table top further away from the surface.

[0006] Disadvantageously, existing half-folding tables with foldable table tops may require a cumbersome mechanism to change the length of the legs. These mechanisms may require the use of both hands or require the table to be placed on its side to access the ability to adjust the leg length

degree activator. For example, some known mechanisms may include two parallel knobs or cylinders that move together. This movement may require placing the user's hand in an inconvenient location and may require using the other hand to extend or retract the leg.

SUMMARY OF THE INVENTION

[0007] Accordingly, there is a need for a table that eliminates or reduces the above-mentioned disadvantages and problems.

[0008] An aspect of an embodiment may include a height adjustment mechanism for the legs. The outrigger height adjustment mechanism may include one or more arms, retractors and/or activators. For example, the height adjustment mechanism may include a first latch arm, a first retractor, a second latch arm, a second retractor, and an activator. The first latch arm may include a first engagement formation, and the first engagement formation may be provided on one end, such as the first end. The first retractor may include a first sloped surface and a first receiving structure engageable with a first engagement structure of the first latch arm such that the first latch arm moves in the first lateral direction from the first Retractor extension. The second latch arm may include a second engagement structure, and the second engagement structure may be provided on one end, such as the second end. The second retractor can be separated from the first retractor. For example, the second retractor may be disengaged from the first retractor in a second lateral direction opposite the first lateral direction. The second retractor may include a second sloped surface and a second receiving structure engageable with the second engagement structure of the second latch arm such that the second latch arm moves in the second lateral direction from the second Retractor extension. The activator can include an angled lower surface that can be positioned outwardly relative to the first inclined surface and the second inclined surface. The angled lower surface may be shaped such that translation or movement of the activator in the longitudinal direction causes the angled lower surface to press against or contact the first inclined surface and the second inclined surface to The first retractor and the second retractor are pulled toward each other. In more detail, the activator can be configured in an inactive position and an active position. In the inactive position, the activator may be in a first longitudinal position relative to the first retractor and the second retractor, which may allow the first retractor and the second retractor to translate outward. In the active position, the activator may be in a second longitudinal position relative to the first retractor and the second retractor, which may allow the inclined lower surface to contact the first inclined surface and the second inclined surface, and which may cause the first retractor and the second retractor translates inward. Additionally, at least a portion of the first and second retractors, the activator, and the first and second latch arms may be positioned in the mechanism cavity, which may be defined by the crossbar assembly. In an exemplary embodiment, a portion of the first latch arm may extend through the first opening at the first end of the crossbar assembly when the activator is in the inactive position. In another exemplary embodiment, a portion of the second latch arm may extend through the second opening at the second end of the crossbar assembly when the activator is in the inactive position. The activator may also include a protrusion extending from the upper portion of the crossbar assembly in the longitudinal direction from the mechanism cavity. The protrusion may include a protrusion height, which may be defined between the upper surface of the rail assembly and the top surface of the protrusion. The upper surface of the crossbar assembly may include arcuate, curved or rounded protrusions, which may include The upper surface has a first end that is substantially coplanar and a second end that is substantially coplanar with the protrusion and has an arcuate protrusion height. The second end of the arcuate protrusion may be positioned proximate the protrusion. The height adjustment mechanism may also include a biasing member, such as a spring. The first retractor may include a first longitudinal surface opposite the first inclined surface. The second retractor may include a second longitudinal surface opposite the second inclined surface. A spring may be positioned between the first longitudinal surface and the second longitudinal surface. The spring may be configured to apply a force to or against one or more retractors. For example, a spring may apply a force against the first retractor and the second retractor. In more detail, the spring may force the first retractor away from the second retractor. If desired, a spring can urge the first and second retractors against the angled lower surface. The height adjustment mechanism may further include a first spring retainer and a second spring retainer. The first spring retainer may be positioned on the first longitudinal surface. The second spring retainer may be positioned on the second longitudinal surface. The first spring retainer and the second spring retainer may be positioned within the portion of the spring. height adjustment

The mechanism may also include one or more pins. In an exemplary embodiment, the height adjustment mechanism may include two pins, the activator may include two longitudinal pin holes, and the first and second latch arms may each include transverse pin holes, the transverse pin holes partially Overlaps one of the two longitudinal pin holes. Each of the two pins may be positioned in one of the longitudinal pin holes and in one of the transverse pin holes. The pin may limit movement of the activator to a substantially longitudinal direction and may limit movement of the first and second latch arms to a substantially transverse direction.

[0009] Advantageously, the height adjustment mechanism may allow extension or retraction of the legs to be accomplished by applying a single force. Thus, the height adjustment mechanism can be actuated by the user with one hand, which can reduce the effort expended when changing the height of the table top relative to a surface such as the ground or floor.

[0010] Another aspect of embodiments may include a table including a table top, a frame, a leg assembly, and a leg height adjustment mechanism. The outrigger height adjustment mechanism may include one or more arms, retractors and/or activators. For example, the leg height adjustment mechanism may include a first latch arm, a first retractor, a second latch arm, a second retractor, and an activator. The first latch arm may include a first engagement structure, and the engagement structure may be provided on the first end. The first retractor may include a first inclined surface and a first receiving structure engageable with a first engagement structure of the first latch arm such that the first latch arm is pulled from the first in the first lateral direction device extension. The second latch arm may include a second engagement structure on the second end. The second retractor is detachable from the first retractor. For example, the second retractor may be disengaged from the first retractor in a second lateral direction that is opposite the first lateral direction from the second retractor. The second retractor may include a second inclined surface and a second receiving structure engageable with the second engagement structure of the second latch arm such that the second latch arm is pulled from the second in the second lateral direction device extension. The activator can include an angled lower surface that can be positioned outwardly relative to the first inclined surface and the second inclined surface. The angled lower surface may be shaped such that translation or movement of the activator in the longitudinal direction causes the angled lower surface to press against or contact the first inclined surface and the second inclined surface. A sloped surface to pull the first retractor and the second retractor toward each other. In detail, the activator may be configured in an inactive position in which the activator is in a first longitudinal position relative to the first retractor and the second retractor to allow the first retractor and the second retractor to translate outwardly . The activator may also be configured in an active position in which the activator is in a second longitudinal position relative to the first retractor and the second retractor and the angled lower surface contacts the first and second inclined surfaces to cause The first retractor and the second retractor translate inward. Additionally, the first and second retractors, a portion of the activator, and portions of the first and second latch arms may be positioned at least partially within the mechanism cavity defined by the crossbar assembly. A portion of the first latch arm may extend through the first opening at the first end of the crossbar assembly when the activator is in the inactive position. A portion of the second latch arm may extend through the second opening at the second end of the crossbar assembly when the activator is in the inactive position. The activator may also include a protrusion extending from the upper portion of the crossbar assembly in the longitudinal direction from the mechanism cavity. The protrusion may include a protrusion height defined between the upper surface of the rail assembly and the top surface of the protrusion. The upper surface of the rail assembly may include an arcuate protrusion including a first end substantially coplanar with the upper surface and a second end substantially coplanar with the protrusion having an arcuate protrusion height Ends. The second end of the arcuate protrusion may be positioned proximate the protrusion. The height adjustment mechanism may also include a biasing member, such as a spring. The first retractor may include a first longitudinal surface opposite the first inclined surface. The second retractor may include a second longitudinal surface opposite the second inclined surface. A spring may be positioned between the first longitudinal surface and the second longitudinal surface. The spring may be configured to apply a force to or against one or more retractors. For example, a spring may apply a force against the first retractor and the second retractor. In more detail, the spring may urge the first retractor to separate from the second retractor and urge the first and second retractors against the angled lower surface. The height adjustment mechanism may further include a first spring retainer and a second spring retainer. The first spring retainer may be positioned on the first longitudinal surface. The second spring retainer can be positioned on the first

Two longitudinal surfaces. The first spring retainer and the second spring retainer may be positioned within the portion of the spring. The height adjustment mechanism may also include one or more pins (eg, two pins), the activator may include one or more longitudinal pin holes (eg, two longitudinal pin holes), and the first latch arm and the second latch The locking arms may each include a transverse pin hole partially overlapping one of the two longitudinal pin holes. Each pin can be positioned in one of the longitudinal pin holes and in one of the transverse pin holes. The pin may limit movement of the activator to a substantially longitudinal direction and may limit movement of the first and second latch arms to a substantially transverse direction.

[0011] Yet another aspect of the embodiments may include one or more leg assemblies pivotally connected to a table. For example, one embodiment may include a first leg assembly and a second leg assembly. The first leg assembly and the second leg assembly are pivotally connected to the table. In more detail, the leg assembly is pivotally connected to the frame and/or the table top. A leg assembly may include any suitable number of legs, leg assemblies, and/or leg subassemblies. For example, the leg assembly may include a first leg subassembly, a second leg subassembly, a crossbar assembly, and a height adjustment mechanism. The first leg subassembly can include a first upper leg having one or more upper latch openings, and the latch openings can be provided on an inner surface of the first upper leg. The first upper leg can at least partially define the first cavity, and the first lower leg can be retractably positioned in the first cavity. The lower leg may have one or more lower latch openings, and one or more of the lower latch openings may be selectively aligned with the one or more upper latch openings. The second leg subassembly can include a second upper leg having one or more upper latches, and the latches can be disposed on an inner surface of the second upper leg. The second upper leg can at least partially define a second cavity, and the second lower leg can be retractably positioned in the second cavity. The lower leg may have one or more lower latches, and one of the lower latches One or more can be selectively aligned with one or more of the upper latch openings. The crossbar assembly may be positioned laterally between the first leg subassembly and the second leg subassembly, and may include a first opening at the first end and a second opening at the second end . The crossbar assembly may be mechanically coupled to the first upper leg and the second upper leg such that the first upper latch of the crossbar assembly is disconnected from the upper latch of the first upper leg The openings are aligned and the second opening of the crossbar assembly is aligned with the first upper latch opening of the upper latch openings of the second upper leg. The height adjustment mechanism may be at least partially included in the crossbar assembly and may include a first retractor, a second retractor, a first latch arm, a second latch arm, and an activator. The first retractor may include a first inclined surface and a first receiving structure. The second retractor may include a second inclined surface and a second receiving structure. The first latch arm may include a first engagement formation engageable with the first receiving formation of the first retractor such that the first latch arm extends from the first retractor in the first lateral direction. The second latch arm may include a second engagement formation engageable with the second receiving formation of the second retractor such that the second latch arm extends from the second lateral direction opposite the first lateral direction The second retractor extends. The activator may include an angled lower surface and may be configured in an inactive position is positioned to allow the first retractor and the second retractor to translate outwardly such that the first latch arm and the second latch arm extend from the first and second openings of the crossbar assembly. The activator may be configured in an active position in which the angled lower surface contacts the first and second inclined surfaces to translate the first and second retractors inwardly to latch the first latch The arm and the second latch arm are pulled into the crossbar assembly through the first opening and the second opening. The activator may include a protrusion extending longitudinally from the upper surface of the crossbar assembly. The transition between the inactive and active positions may include longitudinal translation or movement of the activator relative to the crossbar assembly by applying a substantially normal force to the protrusion. The protrusion may include a protrusion height defined between the upper surface of the rail assembly and the top surface of the protrusion. The crossbar assembly may include two arcuate protrusions positioned proximate the protrusions. Each of the two arcuate protrusions may include a first end substantially coplanar with the upper surface of the crossbar assembly and a second end substantially equal to the height of the protrusion. Outrigger assemblies can also be packaged

Including a biasing member, such as a spring. In detail, the first retractor may include a first longitudinal surface opposite to the first inclined surface. The second retractor may include a second longitudinal surface opposite the second inclined surface. A spring may be positioned between the first longitudinal surface and the second longitudinal surface, and the spring may be configured to apply a force to or against the one or more retractors. For example, a spring may apply a force against the first retractor and the second retractor. In more detail, the spring may force the first retractor to separate from the second retractor and force the first and second inclined surfaces against the angled lower surface. The height adjustment mechanism may also include one or more pins (eg, two pins), the activator may include one or more longitudinal pin holes (eg, two longitudinal pin holes), and the first latch arm and the second latch The locking arms may each include a transverse pin hole at least partially overlapping one of the longitudinal pin holes. The pin can be positioned in one of the longitudinal pin holes and in one of the transverse pin holes. The pin may limit movement of the activator to a substantially longitudinal direction and may limit movement of the first and second latch arms to a substantially transverse direction.

[0012] Yet another aspect of the embodiments may include a folding table. A folding table may include a table top, a frame, one or more leg assemblies, and one or more adjustment mechanisms. The table top can include a first table top section and a second table top section, and the table top can be moved between a collapsed position and an expanded position. When the table top is in the deployed position, the first table top section and the second table top section may be aligned in substantially the same plane. When the table top is in the folded position, the first table top section and the second table top section may be disposed generally adjacent and parallel to each other. The frame can be attached to the table top and can include a first side bar and a second side bar. The first side bar may include a first bar section connected to the first table top section and a second bar section connected to the second table top section. The second side bar may include a first bar section connectable to the first table top section and a second bar section connectable to the second table top section. One or both of the leg assemblies are pivotally connected to the table. Specifically, one or both of the leg assemblies are pivotally connected to the frame and/or table top. The leg assembly may include a first cross member, a first leg subassembly, a second leg subassembly, and a crossbar assembly. The first cross member may include a first end and a second end, the first end may be disposed in the first rod section of the first side rod, and the second end may be disposed in the first rod section of the second side rod in the rod section. The first leg subassembly may be coupled to the first cross member and may include having one or more upper latches Open first upper leg. The upper latch can be provided on the inner surface of the first upper leg. The first upper leg can define a first cavity, and the first lower leg can be retractably positioned in the first cavity. The lower leg may have one or more lower latch openings. The one or more lower latch openings may be selectively aligned with the one or more upper latch openings. Similarly, the second leg subassembly may be mechanically coupled to the first cross member. The second leg subassembly may include a second upper leg having one or more upper latch openings, and the one or more upper latch openings may be provided on an inner surface of the second upper leg. The second upper leg can at least partially define a second cavity, and the second lower leg can be retractably positioned in the second cavity. The lower leg may have one or more lower latch openings, and the one or more lower latch openings may be selectively aligned with the one or more upper latch openings. The crossbar assembly can be positioned laterally between the first leg subassembly and the second leg subassembly. The crossbar assembly may include a first opening at the first end and a second opening at the second end. The crossbar assembly may be mechanically coupled to the first upper leg and the second upper leg such that the first opening of the crossbar assembly is a third one of the one or more upper latches of the first upper leg. An upper latch opening is aligned and the second opening of the crossbar assembly is aligned with one of the second upper legs A first upper latch opening of the or more upper latch openings is aligned. The height adjustment mechanism may be at least partially included in the crossbar assembly and may include a first retractor, a second retractor, a first latch arm, a second latch arm, a spring, and an activator. The first retractor may include a first inclined surface opposite the first longitudinal surface and a first receiving structure. The second retractor may include a second inclined surface opposite the second longitudinal surface and a second receiving structure. The first latch arm may include a first engagement structure engageable or capable of engaging with a first receiving structure of the first retractor

The structures engage such that the first latch arm extends from the first retractor in the first lateral direction. The second latch arm may include a second engagement formation engageable or engageable with the second receiving formation of the second retractor such that the second latch arm is in Extends from the second retractor in a second lateral direction opposite the first lateral direction. A spring can be positioned between the first longitudinal surface and the second longitudinal surface and can be configured to apply a spring force that separates the first retractor from the second retractor. The activator can include an angled lower surface that can be positioned outwardly relative to the first inclined surface and the second inclined surface. The angled lower surface may be configured to contact the first inclined surface and the second inclined surface. The first retractor and the second retractor are drawn toward each other in a lateral direction in response to longitudinal translation or movement of the activator. The activator is configurable in an inactive position that allows outward translation of the first retractor and the second retractor such that the first latch arm and the second latch arm, respectively, are removed from the first and second retractors of the crossbar assembly. A second opening of the opening and crossbar assembly extends. The activator may be configured in an active position such that the first retractor and the second retractor translate inwardly such that the first latch arm and the second latch arm are pulled into the crossbar via the first opening and the second opening in the assembly. The activator may include a protrusion extending longitudinally from the upper surface of the crossbar assembly. inactive location The transition to the active position may include longitudinal translation or movement of the activator relative to the crossbar assembly by applying a substantially normal force to the protrusion. The protrusion may include a protrusion height, and the protrusion height may be defined between the upper surface of the rail assembly and the top surface of the protrusion. The crossbar assembly may include two arcuate protrusions positioned proximate the protrusions. One or both of the two arcuate protrusions may include a first end substantially coplanar with the upper surface of the rail assembly and a second end substantially coplanar with the protrusion. The height adjustment mechanism may further include two pins, the activator may include two longitudinal pin holes, and the first latch arm and the second latch arm may each include a transverse pin hole partially overlapping one of the two longitudinal pin holes. Each of the two pins can be positioned in one of the longitudinal pin holes and in one of the transverse pin holes. The pin may limit movement of the activator to a substantially longitudinal direction and may limit movement of the first and second latch arms to a substantially transverse direction.

[0013] These and other aspects, features and advantages of the present invention will become more apparent from the following brief description of the accompanying drawings, the accompanying drawings, the detailed description of the preferred embodiment, and the appended claims.

Description of drawings

[0014] The accompanying drawings contain drawings of exemplary embodiments to further illustrate and clarify the above and other aspects, advantages and features of the present invention. It should be understood that these drawings depict only exemplary embodiments of the invention and are not intended to limit its scope. The present invention will be described and explained with additional features and details through the use of the accompanying drawings, in which:

[0015] FIG. 1A is an upper perspective view of an exemplary table in a deployed position;

[0016] FIG. 1B is a lower perspective view of the table shown in FIG. 1A in a deployed position;

[0017] FIG. 1C is a lower perspective view of the table shown in FIG. 1A with the leg assemblies disposed in the storage position;

[0018] FIG. 1D is a perspective view of the table shown in FIG. 1A in a folded position;

[0019] FIG. 2A is a partial cross-sectional side view of an exemplary leg assembly in a retracted configuration, which may be implemented in the table of FIGS. 1A-1D;

[0020] FIG. 2B illustrates the leg assembly of FIG. 2A in a transitional configuration between a retracted configuration and an extended configuration;

[0021] Figure 2c shows the leg assembly of Figure 2A in an extended configuration;

[0022] FIG. 3A is an exemplary crossbar assembly in an inactive configuration that may be implemented in the table of FIGS. 1A-1D; [0023] FIG. 3B illustrates the crossbar assembly of FIG. 3A in an active configuration;

[0024] FIG. 4A is a partial cross-sectional side view of an exemplary leg height adjustment mechanism that may be implemented in the crossbar assembly of FIG. 3A, showing the crossbar in an inactive configuration;

[0025] FIG. 4B shows the height adjustment mechanism of FIG. 4A in an active configuration;

[0026] FIG. 5A is an enlarged partial cross-sectional detail view of a portion of the height adjustment mechanism of FIG. 4A in an inactive configuration;

[0027] FIG. 5B is an enlarged partial cross-sectional detail view of a portion of the height adjustment mechanism of FIG. 5A in an active configuration;

[0028] FIG. 6A is an enlarged upper perspective view of an exemplary activator that may be implemented in the height adjustment mechanism of FIG. 4A;

Figure 6B is a cross-sectional view of the activator shown in Figure 6A;

Figure 6c is a lower perspective view of the activator shown in Figure 6A;

[0031] FIG. 7A is an enlarged cross-sectional side view of an exemplary retractor that may be implemented in the height adjustment mechanism of FIG. 4A;

[0032] Figure 7B is an upper perspective view of the retractor shown in Figure 7A;

Figure 7c is a side view of the retractor shown in Figure 7A;

[0034] FIG. 8 is a side view of an exemplary upper portion of a crossbar housing that may be implemented in the crossbar assembly of FIG. 3A; and

[0035] FIG. 9 is a side view of an exemplary latch arm that may be implemented in the crossbar assembly of FIG. 4A.

detailed description

[0036] The present invention generally relates to height adjustment mechanisms for folding tables. However, the principles of the present invention are not limited to height adjustment mechanisms for folding tables. It should be understood that, in light of the present disclosure, the height adjustment mechanisms, tables, and features disclosed herein may be successfully used in conjunction with other types of tables, furniture, and the like.

[0037] Additionally, to help describe the height adjustment mechanism for a table, terms such as top, bottom, front, rear, right, and left may be used to describe the figures. It should be understood that the height adjustment mechanism, table, etc. may be provided in other locations, used in various situations and may perform a variety of different functions. Additionally, the drawings may be drawn to scale and may illustrate various configurations, arrangements, aspects and features of the table. It should be appreciated, however, that the height adjustment mechanism and/or table may have other suitable shapes, sizes, configurations and arrangements, depending, for example, on the intended use of the height adjustment mechanism and/or table. Furthermore, the height adjustment mechanism and/or table may include any suitable number or combination of aspects, features, etc. . Exemplary embodiments of the height adjustment mechanism and table will now be described in detail.

[0038] According to at least one embodiment, the exemplary table 10 may include a table top 12 having an upper surface 14 (FIGS. 1A and 1D), a lower surface 16 (FIGS. 1B and 1C), a first end 18, a second End 20 , first side 22 and second side 24 . The upper surface 14 of the table top 12 may have a generally planar configuration and may form a work surface. The table top 12 may also include an edge disposed around the perimeter or perimeter of the table top 12 . All or part of the edge may be beveled, sloped or rounded, eg to increase user comfort and safety.

[0039] As shown in FIGS. 1B and 1C , the table top 12 may also include a lip 26. The lip 26 may be a downwardly extending lip 26 disposed near or at least near the outer portion or perimeter of the table top 12 . The lip 26 may extend downwardly relative to the lower surface 16 of the table top 12 and the lip 26 may align with or form part of the edge of the table top 12 . It should be appreciated that the lip 26 may also be spaced inwardly from the edge of the table top 12 .

[0040] The table top 12 may have a generally rectangular configuration with rounded corners. The table top 12 may have a relatively large size, and the table 10 may be configured to function as a banquet table or a multipurpose table. For example, the table top 12 may have between the first end 18 and the second end 20

A defined length of about 5 feet (or about 60 inches) and a width of about two and one-half feet (or about 30 inches) defined between the first side 22 and the second side 24, although the table top 12 may be more bigger or smaller. For example, embodiments of table top 12 may include a length of between about 6 feet and 10 feet and a width of about 2 feet to 3 feet. Those skilled in the art will appreciate that the table top 12 may be larger or smaller; may have other suitable shapes and configurations, such as square, circular, oval, etc.; and that the sides, corners, edges and other portions of the table top 12 may be There are various shapes, sizes, configurations and arrangements, eg depending on the intended use of the table. Furthermore, the table 10 may be any suitable type of table, such as a folding table, a non-folding table, a card table, a personal table, a round table, and the like. For example, it should also be understood that the table 10 and its various components may have other shapes, sizes, configurations and arrangements, such as those disclosed in US Pat. Nos. 6,530,331; 7,111,563; 7,475,643; 7,814,844; The entire contents of are incorporated herein by reference. It should also be understood that the table 10 may also include any suitable number and combination of features and aspects, depending, for example, on the intended use of the table 10 .

[0041] The table top 12 may be constructed of a lightweight material such as plastic. Specifically, table top 12 may be constructed of high density polyethylene, although other suitable materials may also be used. The table top 12 may be relatively strong, lightweight, rigid and strong. The table top 12 can be manufactured quickly and easily. The table top 12 may also be relatively durable, weather resistant, temperature insensitive, corrosion resistant, rust resistant, and may not degrade over time or maintain structural integrity over time. The table top 12 may be constructed of plastic, polymer, composite material, or the like. The table top 12 may also be constructed from processes such as blow molding, injection molding, rotational molding, rotomolding, and the like. The table top 12 may be made of other materials of sufficient strength and desired properties, such as wood, metal, alloys, composites, fiberglass, ceramics, and the like. The table top 12 may be fabricated using one or more other suitable processes.

[0042] The table 10 may include one or more support structures 28A and 28B (typically, one support structure 28 or multiple support structures 28). The support structure 28 may be sized and configured to support the table top 12 above a surface (not shown). For example, the table 10 may include a first support structure 28A and a second support structure 28B. The support structure 28 may include one or more leg assemblies 200 . . Some additional details of the leg assembly 200 are provided elsewhere in this disclosure.

[0043] The support structure 28 is movable between an extended or use position (shown in FIGS. 1A and 1B ) and a folded or storage position (shown in FIG. 1C ). In the extended or use position of FIGS. 1A and 1B , the leg assembly 200 may extend outwardly from the table top 12 . In the folded or stowed position of FIG. 1C , the leg assembly 200 may be positioned near or at least proximate the lower surface 16 of the table top 12 . Also, FIGS. 1A-1D depict the table 10 including two support structures 28 . In some embodiments, table 10 may include any suitable number, shape, size, configuration, and arrangement of support structures 28 , eg, depending on the intended use of table 10 .

[0044] The table 10 may be a folding table. The table top 12 may include a first table top section 32A and a second table top section 32B. The first support structure 28A is movable relative to the first table top section 32A between an extended position and a collapsed position. The second support structure 28B is movable relative to the second table top section 32B between an extended position and a collapsed position. The first tabletop section 32A and the second tabletop section 32B may be about an axis of rotation 34 "axis 34") (see, eg, FIGS. 1B and 1C ) in a deployed position (which is shown in FIGS. 1A-1C ) and a folded position (which is shown in Figure 1D).

[0045] When the table top 12 is in the deployed position of FIGS. 1A-1C, the first table top section 32A and the second table top section 32B may be aligned substantially in the same plane. When the table top 12 is in the folded position of FIG. ID, the first table top section 32A and the second table top section 32B may be disposed generally adjacent and parallel to each other. Additionally, in the folded position of FIG. ID, some or all of the components (eg, 28 and 200 ) may be located between the first table top section 32A and the second table top section 32B.

[0046] The first tabletop section 32A and the second tabletop section 32B may have a generally rectangular configuration, with a symmetrical or mirrored configuration. In the deployed position, the first tabletop section 32A and the second tabletop section 32B may meet at the interface 78 (FIG. 1A).

In some embodiments, the first tabletop section 32A and the second tabletop section 32B may include contacting or adjacent interior surfaces to form the interface 78 . The inner surface of the first table top section 32A may be sized and configured to contact and/or engage the inner surface of the second table top section 32B when the table top 12 is in the deployed position ( FIGS. 1A-1C ). The inner surface of the first table top section 32A may be sized and configured to be spaced apart from the inner surface of the second table top section 32B when the table top 12 is in the folded position. The inner surface of the table top 12 may include one or more interlocking, overlapping and/or interwoven portions, such as engaging portions and receiving portions, which may provide additional strength, stability and/or rigidity to at least a central portion of the table top. The table top 12 may also have other shapes, sizes, configurations and arrangements. For example, the table top 12 may be similar to one or more of the table tops shown in US Patent No. 7,096,799, which is incorporated herein by reference in its entirety.

1B, the table 10 may also include a frame 40 connected to the table top 12. The frame 40 may include a surface disposed in contact with or at least proximate the lower surface 16 of the table top 12 . The frame 40 may include one or more side bars 42A and 42B (typically a side bar 42 or a plurality of side bars 42). Specifically, the embodiment of FIG. 1B includes a first side bar 42A and a second side bar 42B that may extend along the length of the table top 12 . Side bars 42 are preferably positioned proximate opposite edges and/or sides 22 and 24 of table top 12 . For example, the side bars 42 may be positioned at least proximate the lip 26 , and there may be a gap or space between the side bars 42 and the lip 26 . The side bars 42 preferably extend nearly the entire length of the table top 12 , which may provide the table top 12 with increased strength and stiffness. Alternatively, the side bars 42 may extend along only a portion of the table top 12 .

[0048] In more detail, the first side bar 42A may be disposed toward the first side 22 of the table top 12. The first side bar 42A may include a first bar section 46A connected to the first table top section 32A of the table top 12 and a second bar section 46B connected to the second table top section 32B of the table top 12 . The first rod section 46A and the second rod section 46B of the first side rod 42A may be offset or spaced apart. For example, in the exemplary coordinate system of FIGS. 1A-1D , the first rod section 46A may be offset from the second rod section 46B in the z-direction.

[0049] The second side bar 42B may be disposed toward the second side 24 of the table top 12. The second side bar 42B may include a first bar section 48A connected to the first table top section 32A of the table top 12 and a second bar section 48B connected to the second table top section 32B of the table top 12 . The first rod section 48A and the second rod section 48B of the second side rod 42B may be offset or spaced apart. For example, the first rod section 48A may be offset from the second rod section 48B in the z-direction.

[0050] The support structure 28 may be connected to the frame 40. For example, the first cross member 208A may connect the frame 40 and the first support structure 28A, and the second cross member 208B may connect the frame 40 and the second support structure 28B.

The ends of the first cross member 208A and the second cross member 208B may be at least partially disposed in openings in the side bars 42 of the frame 40, which may allow the first cross member 208A and the second cross member 208B to be opposed to each other Rotate on frame 40 . The first cross member 208A and the second cross member 208B may form part of the frame 40 and/or the support structure 28 depending, for example, on the specific arrangement and/or configuration of the table 10 . For example, referring to FIGS. 1C and 1D , transitioning the support structure 28 from the extended or in-use position of FIGS. 1A and 1B to the folded or stowed position of FIG. 1C may include rotating the support structure 28 relative to the frame 40.

[0052] FIGS. 2A-2c illustrate an exemplary embodiment of a leg assembly 200 that may be implemented in the table 10. FIG. The leg assembly 200 may be pivotally connected to the table 10 . For example, the leg assembly 200 may be pivotally connected to the frame 40 of the table 10 and/or the table top 12 . FIG. 2A depicts the leg assembly 200 in a retracted configuration. Figure 2c depicts the leg assembly 200 in an extended configuration. Figure 2B depicts the leg assembly 200 in a transitional configuration between the retracted configuration of Figure 2A and the extended configuration of Figure 2c.

[0053] The leg assembly 200 may include a first leg subassembly 202A and a second leg subassembly 202B (typically the leg subassembly 202 or multiple leg subassemblies 202), which are accessible via a crossbar assembly 300. First cross member 208A

Connected to the lower cross bar 204 . The first leg subassembly 202A may include a first upper leg 226A. The first upper leg 226A may at least partially define the first cavity 214A. The first lower leg 230A may be retractably positioned in the first cavity 214A. Similarly, the second leg subassembly 202B can include a second upper leg 226B. The second upper leg 226B may at least partially define the second cavity 214B. The second lower leg 230B may be retractably positioned in the second cavity 214B. The first upper leg 226A and the second upper leg 226B may be collectively or collectively referred to as an upper leg 226 or a plurality of upper legs 226 . The first lower leg 230A and the second lower leg 230B may be collectively or collectively referred to as a lower leg 230 or a plurality of lower legs 230 .

2A, the upper legs 226 may include one or more upper latch openings 2284. The upper latch opening 228A may be provided in the inner surface 212 of the upper leg 226 . In the illustrated embodiment, the upper leg 226 may include a single upper latch opening 2284 . Crossbar assembly 300 may be mechanically coupled to upper leg 226 at inner surface 212 . The rail assembly 300 may be mechanically coupled to the inner surface 212 at the location of the upper latch opening 228A. Specifically, the crossbar assembly 300 may be mechanically coupled to the inner surface 212 such that a latch arm of a leg adjustment mechanism ("adjustment mechanism") included or partially included in the crossbar assembly 300 may interact with the upper latch Lock open D228A alignment.

2C, the lower leg 230 may include one or more lower latch openings 2288. The lower latch opening 228B may be positioned on the inner surface 240 of the lower leg 230 . One or more of the lower latch openings 228B may be selectively aligned with one or more of the upper latch openings D228A. For example, the lower latch D228B may be separated in the y-direction along the inner surface 240 . Thus, when the lower leg 230 is retracted or extended from the upper leg 226, the lower latch opening 228B can be aligned with the upper latch opening D228A.

[0056] The height adjustment mechanism may be configured in an inactive configuration, which is shown in Figures 2A and 2c. In the inactive configuration, portions of the latch arms may be disposed in upper latch open D228A and lower latch open D228B, which may be substantially aligned by extension or retraction of lower leg 230 relative to upper leg 226 .

[0057] The height adjustment mechanism may also be configured in an active configuration, which is shown in Figure 2B. In the active configuration, portions of the latch arms can be withdrawn from the lower latch open D228B or from both the lower latch open D228B and the upper latch opening 228A. Thus, the lower leg 230 can be retracted or extended relative to the upper leg 226 because the latch arm of the height adjustment mechanism is not located in the lower latch opening D228B. When the lower legs 230 are positioned in the desired position, the height adjustment mechanism can be configured in an inactive configuration in which the latch arms are positioned in the upper latch open D228A and the lower latch open D228B. Thus, the lower leg 230 is fixed relative to the upper leg 226 .

[0058] In some embodiments, the first cavity 214A and the second cavity 214B can be sized such that the lower leg 230 can move substantially in the y-direction relative to the upper leg 226 under its weight. For example, referring to FIGS. 1A-1D and 2A-2C, when the table 10 is configured for use, the table 10 may transition from the folded position of FIG. 1D to the unfolded position of FIG. 1C. The leg assembly 200 can then be rotated from the storage position of FIG. 1C to the use position of FIG. 1B . The user may then position the table 10 on the surface with the lower legs 230 retracted into the cavities 214A and 214B. The user may then apply force to the height adjustment mechanism to transition the height adjustment mechanism from the inactive position to the active position (eg, withdraw the latch arm from the lower latch opening). The user may then lift one side (eg, 32A or 32B) of the table 10 that includes the leg assembly 200 to the active configuration. The lower legs 230 can be dropped toward the surface without applying force to the lower legs 230 . Force may also be applied to position the lower legs 230 in the desired position. The user may then withdraw the force from the height adjustment mechanism to configure the height adjustment mechanism in an inactive configuration, which may lock or engage the height adjustment mechanism to prevent further movement of the lower leg 230 relative to the upper leg 226 .

1B and 2C, the first cross member 208 may include a first end portion 252 and a second end portion 254. first end

The portion 252 may be provided in the first rod section 46A of the first side rod 42A, and the second end 254 may be provided in the first rod section 48A of the second side rod 42B. Alternatively, the first end 252 may be provided in the second rod section 46B of the first side rod 42A, and the second end 254 may be provided in the second rod section 48B of the second side rod 42B. The outrigger assembly 200 is thus rotatable relative to the first and second side bars 42A and 42B, which may enable the outrigger assembly 200 to transition from the storage position of FIG. 1C and the in-use positions of FIGS. 1A and 1B .

FIG. 3A is an exemplary embodiment of a rail assembly 300 that may be implemented in table 10 and/or leg assembly 200 . In FIG. 3A, the rail assembly 300 is shown in an inactive configuration. FIG. 3B shows the rail assembly 300 in an active configuration.

[0061] The rail assembly 300 may include a rail housing 301, which may include a housing 302 and upper rail portions 800A and 800B of the rail housing 301. Upper rail sections 800A and 800B are commonly referred to as "upper rail section 800" or "upper rail sections 800". The rail housing 301 may define at least a portion of the mechanism cavity 310 . The mechanism cavity 310 may be configured to house and contain one or more components of the height adjustment mechanism 400 or portions thereof. Some additional details of height adjustment mechanism 400 are provided elsewhere in this disclosure. The housing 302 may include a housing length 312 between the first end 314 and the second end 316 . The housing length 312 may be dimensioned relative to the leg assembly. For example, the housing length 312 may be dimensioned such that the rail housing 301 may be mechanically coupled to the first leg at the first end 314 and to the second leg at the second end 316 . For example, referring to FIGS. 3A and 2A in combination, the housing length 312 may be dimensioned such that the first upper leg 226 is mechanically coupled to the first end 314 and the second upper leg 226 is mechanically coupled to the second end Section 316.

Referring back to FIGS. 3A and 3B, the crossbar housing 301 may be open at the first end 314 and the second end 316, or may define an opening 318A at the first end 314 and the second end 316 and 318B. Openings D 318A and 318B may align with latch openings on the legs to which the rail housing 301 is attached. For example, referring to FIGS. 3A and 2A in combination, openings 318A and 318B may be associated with latch openings 228A and 228A included in the first and second upper legs 226A and 226B to which the rail housing 301 is mechanically coupled. 228B alignment.

[0063] As shown in FIG. 3A, the height adjustment mechanism 400 may be contained in the crossbar housing 301, and the height adjustment mechanism 400 may be configured in an inactive configuration. In the inactive configuration, the latch portion 922 may extend from the rail housing 301 . As the latch portion 922 extends from the rail housing 301, the latch portion 922 may be disposed in and/or engage with a latch opening included in a leg to which the rail housing 301 is mechanically coupled . When the latch portion 922 is disposed in and/or engaged with the latch opening, the latch portion 922 may prevent a leg portion (eg, the lower leg 230 ) from retracting or extending relative to other leg portions.

[0064] As shown in FIG. 3B, the height adjustment mechanism 400 contained in the rail housing 301 may be configured in an active configuration. In the active configuration, the latch portion 922 can be pulled into the rail housing 301 . As the latch portion 922 is pulled into the rail housing 301, the latch portion 922 can be disengaged from a latch opening included in the leg to which the rail housing is mechanically attached. When the latch portion 922 is disengaged from the latch opening, the leg portion (eg, the lower leg 230 ) can be retracted or extended relative to the other leg portions.

[0065] FIG. 4A is an exemplary embodiment of a height adjustment mechanism 400 that may be implemented in the rail assembly 300 of FIG. 3A in an inactive configuration. Figure 4A is described herein with Figure 5A. FIG. 5A is a detailed view of a portion of height adjustment mechanism 400 in an inactive configuration. FIG. 5A is a cross-sectional view of a portion of height adjustment mechanism 400 . Figure 4B is the height adjustment mechanism 400 in an active configuration. Figure 4B is described herein with Figure 5B. 5B is a detailed view of a portion of height adjustment mechanism 400 in an active configuration. FIG. 5B is also a cross-sectional view of a portion of height adjustment mechanism 400 .

4A-5B, height adjustment mechanism 400 may include one or more mechanism components, such as activator 600, retractors 700A and 700B (generally, retractor 700 or retractors 700), biasing members (such as spring 505), one or more pins 506, and latch arms 900A and 900B (typically, latch arms 900 or latch arms 900). Additionally, in Figures 4A and 4B, height adjustment mechanism 400 is depicted as having upper rail portions 800A and 800B.

[0067] In the height adjustment mechanism 400, the retractors 700 may each include an inclined surface 704, a longitudinal surface 706, and a receiving structure 702. Each latch arm 900 may include an engagement structure 906 that is engageable or engageable with the receiving structure 702 of the retractor 700 . The latch arm 900 may extend from the retractor 700 in a lateral direction. For example, the first latch arm 900A may extend from the first retractor 700A in a lateral direction that corresponds to the positive x-direction of Figures 4A and 5A. Similarly, the second latch arm 900B may extend from the second retractor 700B in a lateral direction, which corresponds to the negative x-direction of Figures 4A and 5A.

[0068] The first retractor 700A may be positioned relative to the second retractor 700B such that the longitudinal surface 706 of the first retractor 700A faces the longitudinal surface 706 of the second retractor 700B. The spring 505 may be positioned between the longitudinal surface 706 of the first retractor 700A and the longitudinal surface 706 of the second retractor 700B. The spring 505 may be configured to apply a spring force that separates the first retractor 700A from the second retractor 700B.

[0069] The activator 600 may include an angled lower surface 612. The activator 600 may be positioned relative to the retractor 700 such that the angled lower surface 612 is positioned outward relative to the sloped surface 704 . For example, retractor 700 may be positioned such that inclined surface 704 is located between angled lower surfaces 612 . The angled lower surface 612 may be configured to contact the sloped surface 704 . Specifically, angled lower surface 612 may be configured to contact inclined surface 704 such that longitudinal translation or movement of activator 600 affects lateral translation of retractor 700. For example, in response to longitudinal translation or movement of the activator 600 due to a force sufficient to overcome the spring force, the retractors 700 may be pulled toward each other in lateral directions (eg, the x-direction and the negative x-direction). Similarly, activator 600 may translate in a longitudinal direction (eg, the y-direction) in response to a spring force for disengaging retractor 700 in a lateral direction.

[0070] In FIGS. 4A and 5A, the height adjustment mechanism 400 is in an inactive configuration. In the inactive configuration, the activator 600 may not be subjected to a force or may be subjected to a force of insufficient magnitude to transition the activator 600 to the active position (described below with reference to FIGS. 4B and 5B ). In an inactive configuration, the activator 600 is in an inactive position. In the inactive position, the activator 600 is in the first longitudinal position 403 relative to the retractor 700 . In the inactive position, retractor 700 can be translated or positioned outward. For example, the first retractor 700A may translate in the positive x-direction and the second retractor 700B may translate in the negative x-direction of FIGS. 4A and 5A .

[0071] Outward translation of retractor 700 may cause latch arm 900 to translate outward. For example, the first retractor 700A may be engaged with the first latch arm 900A. Translation of the first retractor 700A in the positive x-direction may result in translation of the first latch arm 900A in the positive x-direction. Similarly, the second retractor 700B can engage with the second latch arm 900B. Translation of the second retractor 700B in the negative x-direction may result in translation of the second latch arm 900B in the negative x-direction. Translation of the latch arm 900 can cause a latch portion 922 of the latch arm 900 to extend from the opening of the crossbar assembly, which can engage the latch opening (eg, 228A and/or 228B in FIGS. 2A-2c ). ).

[0072] In FIGS. 4B and 5B, the height adjustment mechanism 400 is in an active configuration. In the active configuration, the activator 600 may be subjected to a force 401 that is not of sufficient magnitude to overcome the spring force exerted by the spring 505 . In the active configuration, the activator 600 is in the active position. In the active position, the activator 600 may be disposed at the second longitudinal position 405 relative to the retractor 700 . The second longitudinal location 405 may be closer to the retractor 700 and further away from the upper rail portion 800 .

[0073] In the active position, retractor 700 can be translated inwardly. For example, the first retractor 700A may be in the negative x-direction

translates, and the second retractor 700B can translate in the positive x-direction of FIGS. 4B and 5B. Inward translation of retractor 700 may cause inward translation of latch arm 900 . For example, the first retractor 700A may be engaged with the first latch arm 900A. Translation of the first retractor 700A in the negative x-direction may result in translation of the first latch arm 900A in the negative x-direction. Similarly, the second retractor 700B can engage with the second latch arm 900B. Translation of the second retractor 700B in the positive x-direction may result in translation of the second latch arm 900B in the positive x-direction. Translation of the latch arm 900 can cause the latch portion 922 of the latch arm 900 to be pulled into the crossbar assembly via the opening, which can cause the latch portion 922 to communicate with the latch opening (eg, in FIGS. 2A-2c ). 228A and 228B) disengage. The lower legs may retract or extend when the latch portion 922 is disengaged from the latch opening. When the lower legs are retracted or extended to the desired length, the force 401 can be removed or reduced, which can transition the height adjustment mechanism 400 to an inactive configuration. In the inactive configuration, the latch portion 922 may engage in the latch opening.

[0074] In an exemplary embodiment, the activator 600 may include two longitudinal pin holes 616, as best depicted in FIGS. 5A and 5B. Furthermore, in these and other embodiments, the locking arms 900 may each include transverse pin holes 914 . The transverse pin hole 914 may partially overlap one of the two longitudinal pin holes 616 . The pin 506 may be positioned in one of the longitudinal pin holes 616 and in one of the transverse pin holes 914 . The pin 506 may limit movement of the activator 600 in a generally longitudinal direction (eg, the y-direction) and movement of the latch arm 900 in a generally lateral direction (eg, the x-direction).

[0075] Figures 6A-6c illustrate an exemplary embodiment of an activator 600 that may be implemented in the height adjustment mechanism 400 of Figure 4A. FIG. 6A is an external perspective view of activator 600 . FIG. 6B is a cross-sectional view of the activator 600 . FIG. 6c is a lower perspective view of the activator 600. FIG.

6A, the activator 600 can include a generally rectangular structure 601 having protrusions 623, the protrusions 623 can extend from the upper surface 603 of the rectangular structure 601. Rectangular structure 601 may include activator length 607 , activator thickness 609 and activator height 605 . The protrusion 623 may be positioned in the central portion of the activator length 607 . For example, the center of the protrusion 623 in the longitudinal direction may correspond to the center of the activator length 607 . The protrusion length 631 may be less than the activator length 607 . For example, protrusion length 631 may be about half, about one quarter, about one third, about one fifth, or another suitable ratio of activator length 607 .

[0077] The protrusions 623 may extend across all or most of the activator thickness 609. The activator thickness 609 may correspond to the width of the cavity defined in the rail housing in which the activator 600 may be disposed. For example, referring to FIG. 3A, the crossbar housing 301 may define a mechanism cavity in which the height adjustment mechanism 400 may be disposed or at least partially disposed in the mechanism cavity. The mechanism cavity may include a width corresponding to the activator thickness 609 or may be substantially equal to the activator thickness 609 . Thus, the activator thickness 609 may be fixed or retained within the mechanism cavity of the rail assembly 300 .

[0078] The activator height 605 may be related to the height of a cavity defined in the rail housing in which the activator 600 may be disposed. For example, referring to FIGS. 6A and 3A, the crossbar housing 301 may define a mechanism cavity in which the height adjustment mechanism 400 may be disposed or at least partially disposed in the mechanism cavity. The mechanism cavity may include a height greater than the activator height 605 . Thus, the activator 600 can translate longitudinally within the crossbar housing. For example, a user may depress protrusion 623, which may allow activator 600 to translate within the mechanism cavity. As described in this disclosure, the activator 600 can be in an active position and an inactive position. In the active position, a force oriented substantially in the longitudinal direction can be applied to the protrusion 623, which can cause the activator 600 to translate or move in the negative y-direction. In the inactive position, the force can be removed from the protrusion 623, which can cause the activator 600 to translate or move in the positive y-direction.

6A and 6B, the activator 600 may include two longitudinal pin holes 616. The longitudinal pin holes 616 may comprise rounded rectangular holes. The longitudinal pin hole 616 may include a lateral dimension 618, which may be smaller than the longitudinal dimension 620. Portrait size 620 can

Corresponds to or substantially equals to the size of a pin (eg, pin 506 ) that may be disposed in longitudinal pin hole 616 . Lateral dimension 618 may correspond to the distance that activator 600 translates in response to a force exerted on protrusion 623 . Longitudinal pin holes 616 may limit movement of activator 600 in a substantially longitudinal direction. For example, the longitudinal pin holes 616 may prevent or substantially prevent movement of the activator 600 in the lateral direction.

6B and 6C, the activator 600 may define a cavity 629. Cavity 629 may include cavity width 627 (FIG. 6C). The cavity width 627 may be sized to receive the portion of the retractor. Some details of cavity width 627 are provided elsewhere in this disclosure. The lateral edge of cavity 629 may be angled lower surface 612 . The angled lower surface 612 may be configured to contact an inclined surface of the retractor that may be positioned in the cavity 629 . For example, referring to FIGS. 6B , 6c and 7B , the upper portion 722 including the inclined surface 704 may be disposed in the cavity 629 . The angled lower surface 612 may contact the inclined surface 704 when the upper portion 722 is disposed in the cavity 629 . Thus, a force, such as a force exerted on the protrusion 623 in the longitudinal direction, can be transferred from the activator 600 to the retractor 700 . Forces in the longitudinal direction can cause lateral translation of retractor 700 . Similarly, the spring force may be a lateral force exerted by retractor 700 on angled lower surface 612 , which may cause longitudinal translation or movement of activator 600 .

[0081] Referring to FIG. 6B, the protrusion 623 may include a protrusion height 621. The protrusion height 621 may be defined between the upper surface 603 of the rectangular structure 601 and the upper surface 653 of the protrusion 623 or a portion thereof. For example, in the illustrated embodiment, the protrusion 623 may include a concave upper surface 653 . In these and other embodiments, protrusion height 621 may be defined between upper surface 603 of rectangular structure 601 and upper surface 653 at end 655 .

[0082] The protrusion height 621 may correspond to the height of the arcuate, rounded or curved protrusions on the rail assembly or rail housing. Specifically, the protrusion height 621 may be dimensioned such that the arcuate protrusion gradually or uniformly abuts the upper surface 653 of the protrusion 623 . For example, referring to FIGS. 6B and 8 , the size of the protrusion height 621 may be set relative to the height 810 of the arcuate protrusion 802 at the second end 806 . The protrusion height 621 may be dimensioned such that when the second end 806 is positioned proximate the protrusion 623, the surface of the arcuate protrusion 802 transitions to the upper surface 653 with no or minimal interruption. The benefits of such a transition may include preventing or reducing accidental activation of the activator 600 . In addition, the transition may reduce or prevent damage to the protrusions 623 caused by objects striking the protrusions 623 . A view of protrusion 623 assembled with arcuate protrusion 802 is provided at least in FIGS. 4A and 3B.

6A and 6C, in the illustrated embodiment, the activator 600 may include an arm channel 651 extending from the cavity 629. Arm channel 651 may be configured to enable latching arms to engage with a retractor (eg, retractor 700 described elsewhere in this disclosure) and to extend from cavity 629 . Additionally, the arm channel 651 can implement a locking arm with a pin hole that can be aligned with the longitudinal pin hole 616 . For example, referring to FIGS. 6A, 6c, and 9 in combination, the latch arm 900 may include a transverse pin hole 914. The latch arm 900 may be disposed at least partially in one of the arm channels 651 . When disposed therein, the transverse pin holes 914 may be aligned with the longitudinal pin holes 616 such that there is some overlap. A pin (eg, pin 506 ) may then be positioned in transverse pin hole 914 and longitudinal pin hole 616 .

[0084] Figures 7A-7c illustrate an exemplary embodiment of a retractor 700 that may be implemented in the height adjustment mechanism 400 of Figure 4A. FIG. 7A is a cross-sectional view of retractor 700 . FIG. 7B is a perspective view of retractor 700 . FIG. 7c is a side view of retractor 700 .

7A-7C in combination, the retractor 700 may include an inclined surface 704, a longitudinal surface 706, a bottom surface 707, and a receiving structure 702. The inclined surface 704 may be opposite the longitudinal surface 706 . The longitudinal surface 706 may be oriented substantially in a longitudinal direction, which corresponds to the y-direction of Figure 7A.

In some embodiments, when retractor 700 is assembled into a height adjustment mechanism (such as height adjustment mechanism 400)

, the retractor 700 may be oriented relative to the other retractor such that the longitudinal surface 706 of the retractor 700 faces the corresponding longitudinal surface of the other retractor. For example, longitudinal surface 706 may be oriented substantially in the YZ plane of Figure 7A. The inclined surface 704 may have a smaller x-coordinate than the longitudinal surface 706 according to the coordinate system of FIG. 7A . Another retractor 700 may also be oriented substantially in the YZ plane. However, the inclined surface 704 of the other retractor 700 may have a larger x-coordinate than the longitudinal surface 706 of the other retractor 700 . Figure 5B depicts two retractors 700 with longitudinal surfaces 706 of the retractors 700 facing each other.

[0087] In a configuration in which the two retractors 700 face each other, a spring (eg, 505 of FIG. 5A ) may be disposed between the longitudinal surfaces 706 of the retractors 700. Specifically, the spring may contact the longitudinal surface 706 of the retractor 700 . Thus, a spring force, which may be induced by a compression spring, may act on the longitudinal surface 706 .

[0088] In the depicted embodiment, the retractor 700 may include a spring retainer 709. Spring retainer 709 may be configured to fix or partially fix the spring relative to retractor 700 . For example, in the illustrated embodiment, the spring retainer 709 may protrude from the longitudinal surface 706 in a lateral direction, which corresponds to the x-direction of Figure 7A. The spring retainer 709 may be sized such that it is disposed within the volume defined by the coils of the spring. Spring retainer 709 can thus prevent or reduce movement of the spring along longitudinal surface 706 .

[0089] In the depicted embodiment, the spring retainer 709 may include a structure protruding from the longitudinal surface 706, and the structure may be configured to be introduced or disposed within the spring. In other embodiments, the spring retainer may include a circular recess formed in the longitudinal surface 706 in which the spring is positioned, a fastener, or other suitable structure that limits the movement of the spring. In some embodiments, spring retainer 709 may be omitted.

[0090] The sloped surface 704 may be oriented at an angle 705 relative to the bottom surface 707. Angle 705 may correspond to the angled lower surface of the activator. For example, referring to FIG. 6B , angle 705 may be a supplement to angle 617 (eg, the sum of the angles is 180 degrees) and/or may be substantially equal to angle 615 of activator 600 . In this assembled configuration, the sloped surface 704 or a portion thereof may be in contact with the angled lower surface of the activator. Because of the contact between the angled lower surface and the inclined surface 704, movement or translation of the activator in the longitudinal direction may result in translation of the retractor 700 in a substantially transverse direction. [0091] For example, referring to FIG. 7A, a substantially normal force 701 or a force having a normal component may be applied to the sloped surface 704. For example, the activator may apply the normal force 701 on the sloped surface 704 . The normal force 701 may include a longitudinal component and a transverse component. Additionally, lateral force 703 may be applied to longitudinal surface 706 . For example, a spring may exert lateral force 703 on longitudinal surface 706 . In response to normal force 701 having a magnitude sufficient such that the lateral component is greater than lateral force 703, retractor 700 may translate in a lateral direction that may correspond to the positive x-direction. Also, in this case, the activator can translate in the longitudinal direction corresponding to the negative y-direction. In response to having a magnitude such that the lateral component is less than the lateral force 703 With normal force 701, retractor 700 can translate in a lateral direction corresponding to the negative x-direction. Also, in this case, the activator can translate in the longitudinal direction corresponding to the positive y-direction.

Translation of retractor 700 may result in translation of the latch arms engaged in receiving structure 702. Referring to FIGS. 7A and 7B , the receiving structure 702 may include a channel 710 extending from the sloped surface 704 to the bottom surface 707 . The width 712 of the channel 710 may be configured to receive a latch arm having a specific thickness. For example, width 712 may be about one quarter of an inch, three eighths of an inch, or another suitable width. The receiving structure 702 may include an angled portion 714 (FIG. 7A). The angled portion 714 may include a first inner longitudinal surface 750 . In response to translation of retractor 700 in the positive x-direction, first inner longitudinal surface 750 may press against or contact an inner longitudinal surface of the latch arm engaged in receiving structure 702 . Accordingly, translation of retractor 700 may result in translation of the latch arm. For example, referring to FIGS. 7A and 9 in combination, the first inner longitudinal surface 750 of the retractor 700 may press against or contact the inner longitudinal surface 950 of the latch arm 900, which may result in translation of the retractor 700 and the latch arm 900.

[0093] With continued reference to FIGS. 7A and 9 , the receiving structure 702 may include a second inner longitudinal surface 752. In response to translation of retractor 700 in the negative x-direction of FIG. 7A , second inner longitudinal surface 752 may press against or contact the end of latch arm 900 engaged in receiving structure 702 . For example, the second inner longitudinal surface 752 of the retractor 700 may press against or contact the first end 908 of the latch arm 900 . Accordingly, translation of retractor 700 may cause latch arm 900 to translate.

7B, the retractor 700 may include a base 720 and an upper portion 722. The width 724 of the base portion 720 may be greater than the width 726 of the upper portion 722 . Width 726 may correspond to a cavity configured to receive upper portion 722 . For example, the activator 600 of FIG. 6c may include a cavity 629 that includes a cavity width 627. Cavity 629 may be sized to receive upper portion 722 of retractor 700 . Thus, cavity width 627 may be slightly larger (eg, one sixteenth inch, one eighth inch larger) than width 726 of upper portion 722 .

[0095] In the embodiment of FIG. 7B, the channel 710 may be defined in a central portion or substantially central portion of the upper portion 722. For example, upper portion 722 may include some material on both sides of channel 710 . In some embodiments, channel 710 may not be centered on upper portion 722 . In these and other embodiments, upper portion 722 may not include material on both sides of channel 710 .

[0096] FIG. 8 depicts an exemplary embodiment of an upper rail portion 800. In some embodiments, upper rail portion 800 may be implemented in rail assembly 300 of Figure 3A. The upper rail portion 800 may be part of the housing of the rail assembly. For example, the upper rail portion 800 of FIG. 8 may be one side of the housing of the rail assembly. The housing may include another upper rail portion. For example, the housing may include another substantially similar upper rail portion 800 on the other side of the housing. [0097] The upper rail portion 800 may include an upper surface 808. The upper surface 808 may be external to the rail assembly. The upper surface 808 may be opposite an interior feature 814, which may be configured to interface with the side of the rail housing. Internal features 814 can be connected to arm retainers 812 that can guide latch arms disposed in the crossbar assembly.

[0098] The upper rail portion 800 may include arcuate, rounded or curved protrusions 802. Arc-shaped protrusions 802 may be included on upper surface 808 . The arcuate protrusion 802 may include a first end 804 and a second end 806 . At first end 804 , arcuate protrusion 802 may be coplanar or substantially coplanar with upper surface 808 . At the second end 806, the arcuate protrusion 802 may include a height 810 that is substantially equal to the height of the protrusion. For example, referring to FIGS. 8 and 6A , the height 810 of the arcuate protrusion 802 may be substantially similar to the protrusion height 621 . As discussed above, the arcuate protrusions 802 may facilitate positioning the user's hand on the protrusions (eg, protrusions 623 of Figure 6A). The arcuate protrusion 802 may be positioned proximate the protrusion. For example, the second end 806 may be positioned beside the protrusion and/or may abut the protrusion.

[0099] FIG. 9 illustrates an exemplary embodiment of a latch arm 900 in accordance with at least one embodiment of the present disclosure. The latch arm 900 may generally comprise a strip of material. The material may include, for example, carbon steel or aluminum. In other embodiments, the material may comprise a plastic or polymer, which may be coated or otherwise hardened. Additionally, the latch arm 900 of FIG. 9 may comprise a single unitary one-piece structure. In other embodiments, the latch arm 900 may include two or more substructures or assemblies that may be mechanically coupled. [0100] The latch arm 900 may include an arm length 902 defined in a lateral dimension corresponding to the x-direction of FIG. 9 . The arm length 902 may be less than about half the length of the crossbar assembly in which the latch arm 900 is implemented. For example, the crossbar assembly may include or house a latch arm 900, as well as another latch arm substantially similar to latch arm 900 and one or more additional adjustment mechanism components.

[0101] The latch arm 900 may also include an arm height 904. The arm height 904 may be defined in a longitudinal dimension corresponding to the y-direction of FIG. 9 . The arm height 904 can be dimensioned such that the latch arm 900 can be contained in the crossbar assembly or its crossbar housing. The arm thickness may be defined in the z-direction of FIG. 9 . The thickness of the arms may be about a quarter of an inch, three-eighths of an inch, or another suitable thickness.

[0102] The latch arm 900 may include an engagement structure 906. An engagement structure 906 may be provided at the first end 908 of the latch arm 900 . The engagement structure 906 may be configured to engage with a receiving structure of the retractor. For example, the engagement structure 906 may be configured to engage the receiving structure 702 of the retractor 700 of Figures 7A-7c. For example, in the illustrated embodiment, the engagement structures 906 may include hook-shaped projections. The hook-shaped protrusions may be formed by removing portions 910 of the material of the latch arms 900 . The removed portion 910 of material may have a rectangular portion connected to a triangular portion. The dimensions of the removed portion 910 may substantially correspond to the receiving structure of the retractor. In other embodiments, the removed portion 910 may include a curved portion or an angled portion, which may correspondingly result in the engagement structure 906 having another shape.

[0103] In the depicted embodiment, when the engagement structure 906 is engaged in the receiving structure, the remaining portion 912 of the latch arm 900 may extend in a lateral direction, which may correspond to the x-direction of FIG. 9 . Additionally, the retractor, or a portion thereof, may contact the interior longitudinal surface 950 as the retractor is translated in the lateral direction. The retractor may press against or contact the inner longitudinal surface 950 to translate the latch arm 900 . For example, in an active configuration, the activator can cause the retractor to translate. The retractor can then act on the inner longitudinal surface 950 to translate the latch arm 900 .

[0104] The latch arm 900 may include a latch portion 922. The latch portion 922 may be included at a second end 920 of the latch arm 900 opposite the first end 908 on the latch arm 900 . The latch portion 922 may include a sloped bottom surface 924 . The sloped bottom surface 924 may facilitate introduction of the latch portion 922 into a latch opening of the leg assembly (eg, the latch openings D228A and 228B of the upper leg 226 and/or the lower leg 230). When the height adjustment mechanism implementing the latch arm 900 is in the inactive configuration, the latch portion 922 or a portion thereof may extend from the crossbar assembly. Additionally, when the height adjustment mechanism implementing the latch arm 900 is in the active configuration, the latch portion 922 can be pulled into the crossbar assembly, which can enable the lower legs to retract and extend relative to the upper legs.

[0105] The latch arm 900 may include a transverse pin hole 914. The lateral pin holes 914 may comprise rounded rectangular holes. The lateral pin holes 914 may include a lateral dimension 918 that is greater than the longitudinal dimension 916. Longitudinal dimension 916 may correspond to or substantially equal to the dimension of a pin (eg, pin 506 ) that may be disposed in transverse pin hole 914 . The lateral dimension 918 may correspond to the distance that the latch arm 900 translates in response to movement of the retractor. The lateral pin holes 914 may limit movement of the latch arm 900 to movement in a substantially lateral direction. For example, the lateral pin holes 914 may prevent or substantially prevent movement of the latch arm 900 in the longitudinal direction.

[0106] While this invention has been described in terms of certain preferred embodiments, other embodiments that will be apparent to those of ordinary skill in the art are also within the scope of this invention. Accordingly, the scope of the present invention is to be limited only by the following claims.