Bed system

ES 2 371 697 T3

DESCRIPTION

Bed system

The present invention relates to a bed system, comprising a mattress support structure, comprising an outer frame composed of first and second transverse sides on opposite transverse sides of the frame, and of first and second longitudinal sides on opposite longitudinal sides of the outer frame; a plurality of adjacent traverses, where each of the cross members is connected with the first longitudinal side of the outer frame by a first transverse end and, with the second longitudinal side of the outer frame, by a second transverse end; at least one of said cross members being a multiangular cross member, having a plurality of cross member faces and which is rotatable about an eccentric axis of rotation, which is accessible from outside said outer frame; a plurality of springs disposed within the outer frame and mounted on top of the plurality of cross members; a height adjustment system, comprising said at least one rotary crossbar and a rotation transmitting element, which is accessible from outside the outer frame along a longitudinal side of the outer frame and which is provided to transmit a rotation to said at least one cross member rotatable around its eccentric axis, according to the preamble of the first claim.

An ordinary bed system usually comprises a top mattress, which is placed on top of a mattress support structure. Said mattress support structure usually comprises a base structure on which a package of springs is fixed, usually encapsulated in a soft material. The frame formed by the base structure and the spring pack is then covered with a textile material, in such a way that an aesthetically attractive piece of furniture is configured.

Ordinary bed systems provide equal support for all parts of a person's body, regardless of their configuration and weight. However, different parts of the body require different orthopedic support. On the other hand, different adult human bodies can present significant differences in configuration and weight, which can vary even during life, for example, as a consequence of pregnancy, overweight or illness.

In order to increase user comfort, especially orthopedic support, several bed systems have been developed in which height differences are fixed in the mattress support structure. US-A-7210181 describes, for example, a bed system with a mattress support structure, comprising a number of transverse slats. The slats are arranged to support a plurality of springs. The transverse slats are divided into first and second slats, which support the first and second springs, respectively. The height of the first and second slats and the spring constant of the first and second springs are chosen so as to provide a different support: slats of low height and springs with a high spring constant are arranged in the supporting region of shoulders, hips and legs; Higher slats and springs with a lower elastic constant are arranged in the supporting region of other parts of the human body. This type of bed system has the disadvantage that, because the height differences are fixed in a fixed way in the mattress structure, the bed system may not adapt to changes in the human body over time.

In order to solve this problem, EP-B-1410742 provides a bed system with a mattress support structure, in which the amount of support can be adapted to changes in the profile of the human body over time. The mattress support structure comprises an outer frame and a plurality of height adjustment means, installed on the outer frame, and aligned with corresponding adjustment means of a shock absorbing element. The damping element fits vertically into the outer frame. In a first embodiment described in EP-B-1410742, the height adjustment means comprise a series of projections rotatably mounted on the outer frame. The damping element comprises a frame, springs and a padded layer covering the springs. The damping element further comprises a number of three-level recesses which, when fitted to the outer frame, lock the projections in one of the three positions. Such a bed system has the disadvantage that only a limited area of ​​the mattress support structure can be adjusted, namely the part that is the length of the shock absorber. Another drawback is that height adjustment is cumbersome and requires a plurality of different steps to be carried out. On the other hand, since the left and right side of the bed need to be mounted separately, the installation is likely to be done incorrectly and an unstable supporting structure will be obtained. In a second preferred embodiment described in EP-B-1410742, the height adjustment means comprise a plurality of triangular rotary means, which can rotate around an eccentric axis and as such provide three different height levels to the supporting slats. and, therefore, to the springs supported by the slats. Such a bed system has the drawback that the contact surface between the triangular rotating means and the support slats is too small to provide stable support for the upper mattress. Another drawback is that no means are provided to block the position of the triangular rotating means, as a result of which the return of the elements cannot be prevented.

ES 2 371 697 T3 means of rotation as a result of a dynamic load. Another drawback is that the triangular rotating means do not directly support the springs, but additional slats are needed on top of the rotating means to support the springs. As a consequence, the height of the mattress support system is adversely increased by the height adjusting means. In a third preferred embodiment described in document EPB-1410742, the height adjustment system comprises discs, which are eccentrically mounted on a continuous shaft mounted on the outer frame. The shaft can be rotated with a crank handle, which is accessible from the outside of the outer frame. A damping element is mounted on top of the rotating transverse discs. Such a bed system has the drawback that the height adjustment system is infinitely variable, which makes it difficult to provide the user with a correct orthopedic recommendation. This is due to the fact that the measurement error - in an analysis of the user's body profile with a view to the adjustment recommendation - is greater than the height difference between subsequent height positions, which makes the recommendation incorrect and subjective. . In the event that a number of possible height positions is too large, it increases the risk of incorrect installation accordingly.

Document US-3340548 describes an apparatus in which the amount of support of the springs can be adapted to changes in the profile of the human body over time. The apparatus for this comprises an elongated rectangular structure, which serves as an outer frame for a plurality of pressure-applying body supporting means and a plurality of pressure-adjusting means. Each of the supporting means of the pressure-applying body comprises a row of spring coils, a rigid bottom joist element, called a "platen" (plate), attached to the bottom of the coils and extending between opposite longitudinal sides. of the frame, and a rigid top joist member, called a header, attached to the top of the turns and extending between the opposite longitudinal sides of the frame. Each of the pressure adjusting means selectively raises an individual "platen" and the row of springs associated therewith. For this, each of the pressure adjustment means comprises a control shaft and a pair of circular cams spaced at opposite longitudinal ends of the shaft. The shaft and cams are mounted under the platen so that by rotating the shaft the circumferences of the cams have a sliding fit with the bottom of the platen. Because the cams are eccentrically mounted on the control shaft, the cams raise or lower the respective "platen" as the shaft rotates. The rotation of the shaft can be applied from the outside with a removable crank, which can be fitted over a projecting end of the shaft. The position of the cams, and thus of the "platen", can be ensured in a limited number of raised positions with the aid of a calibrated disc attached to the shaft and accessible from outside the frame. To this end, the calibrated disk has incrementally positioned and spaced circumferential pawls and a pawl, which can be manually operated to engage or be released from the pawls.

An apparatus such as that described in document US-3340548 has the drawback that the rotation transmitting element, which is the removable crank, is not capable of locking the cams in a certain position. Locking the position of the cams can only be achieved by performing separate handling, that is, by manually engaging a pawl mounted on the outer side of the frame into one of the pawls on the calibrated disc. Such a locking system is cumbersome because it requires separate handling by the user after the shaft has been turned. In fact, the user needs to move the pawl from the ratcheted position to a disengaged position, while holding the detachable handle in the turned position. In order to continue either in the locked position or in the unlocked position, the pawl is engraved. Consequently, there is a substantial risk that the catch will move from the locked position to the unlocked position exerting a dynamic load on the apparatus, resulting in insufficiently stable support for an upper mattress positioned on top of the apparatus.

It is, therefore, an object of the present invention to provide an original mattress support system with a height adjustment system with a reduced risk of returning to a previous position or another position, which provides the mattress support system with a limited number of different height positions.

This is achieved, according to the present invention, with a mattress support system exhibiting the technical characteristics of the characterizing part of the first claim.

The invention is further clarified in the attached figures and in the description of the figures.

Figures 1A and 1B show a mattress support structure of a bed system according to the present invention.

Figures 2A and 2B show, respectively, a three-dimensional view and a cross section of a preferred embodiment of a rotary traverse according to the present invention.

Figure 3 shows a preferred embodiment of the different parts of a modular height adjustment system of a bed system according to the present invention.

ES 2 371 697 T3

Figure 4 shows a preferred embodiment of the connector of a modular height adjustment system according to the present invention.

Figure 5 shows a preferred embodiment of the box of a modular height adjustment system according to the present invention.

Figure 6 shows a preferred embodiment of the girder element of a modular height adjustment system according to the present invention.

Figure 7 shows a preferred embodiment of the support member of the beam of a modular height adjustment system according to the present invention.

Figures 1A and 1B show a preferred embodiment of a mattress supporting structure 1 of a bed system according to the present invention. Said mattress supporting structure 1 comprises an outer frame 2, which includes two transverse sides 5, 6 and two longitudinal sides 3, 4. The mattress supporting structure 1 further comprises a plurality of adjacent traverses 7, each connected by a first traversing end to a first longitudinal side 3 of the outer frame and by a second traversing end, to a second side 4, opposite to the first longitudinal side 3, of the outer frame 2. The cross members 7 are arranged at a mutual distance and extend close to each other in the longitudinal direction of the outer frame 2. A plurality of springs 13 are arranged inside the outer frame 2, which are mounted on top of said plurality of cross members 7. The mattress supporting structure 1 formed by said plurality of springs 13, said outer frame 2 and said plurality of cross members 7 is covered preferably of a textile material, as shown in Figure 1A to enhance the aesthetic appearance of the bed system assembly. An upper mattress (not shown) is then preferably arranged on top of the covered mattress support structure, so as to obtain a quadrangular spring bed system. Alternatively, the mattress support structure can function at the same time as the mattress of the bed system and the user can lie directly on top of the mattress support structure 1.

At least one of those adjacent transverse beams is a multi-angle rotary traverse 7 as shown in Figure 1B and as shown in detail in Figures 2A and 2B. Said at least one multiangular rotary traverse 7 comprises an eccentric rotation axis 12, which is accessible from outside the outer frame 2. Said at least one multiangular rotary traverse 7 further comprises a plurality of traversing faces 8, 9, 10, 11, oriented to each other in such a way that a multiangular traverse is formed as shown, for example, in Figures 2A and 2B. Figures 2A and 2B show a rotatable traverse 7 with a quadrangular cross section, comprising four traversing faces 8, 9, 10, 11, which together form a quadrilateral. However, the multiangular, rotary traverse may have any other type of cross section deemed suitable by a person skilled in the art, such as a triangular cross section defined by three traversing faces that together form a triangle. One of said traversing faces acts as a supporting surface for at least one row of springs of said plurality of springs. The row 13 of springs may be in direct contact with one of said traverse faces or an additional layer may be provided between the upper face of the traverse and the springs.

By rotating said traverse 7 rotatably around its eccentric axis 12, the upper face 11 of the traverse, that is, the face of the traverse, which supports the springs 13, will obtain a different height with respect to the outer frame 2. Consequently, the springs 13 that remain on top of the upper face 13 of the traverse will be positioned higher or lower, depending on the specific position of the upper face 11 of the traverse with respect to the outer frame 2. The rotary traverse 7 shown in Figure 2B comprises, for example, first, second, third and fourth faces 10, 11, 9, 8, respectively. The first face 10 of the traverse has the highest position with respect to the outer frame 2 and places the springs 13 in the highest position with respect to the outer frame 2. The fourth face 8 of the traverse has the lowest position with respect to the outer frame 2 and places the springs 13 in the lowest position with respect to the outer frame 2. The rotatable traverse 7 preferably functions as a direct bearing surface for the springs 13 mounted above the traverse and is, at the same time, capable of adjusting its height relative to the outer frame 2. Consequently, since no additional support slats are needed on top of the rotatable traverse 7 to support the springs 13, a reduction in the overall height and weights of the mattress support structure 1 can be achieved compared to prior art systems.

The rotation of said rotary traverse around its eccentric axis 12 is done with part of the height adjustment system of the bed system and, in particular, with the help of an element 14 that transmits the rotation of a height adjustment system, which it is accessible from outside the outer frame 2. Said rotation transmitting element 14 may be a part of the rotary traverse itself, for example, in the form of a recess, which is accessible from the outside and which extends in the longitudinal direction of the eccentric axis of rotation, but is preferably a separate connectable member when traversing it rotary. Such a separate rotation transmitting element 14 can

ES 2 371 697 T3 take, for example, the form of an element, which fits into an opening in a longitudinal side of the outer frame, and which comprises a projecting part, extending at least partially into the interior of the outer frame and at least partially corresponding to a corresponding part of a rotating beam or a beam element mounted on the rotating beam and extending in the longitudinal direction of the axis of rotation eccentric of the rotating cross member. Said protruding part can fit around or within a protruding part of the rotating beam or the beam element or within a slotted part of the rotating beam or beam element. By accessing the rotation transmitting element 14 from outside the outer frame 2 and rotating it, said rotating cross member 7 can be rotated and a height adjustment can be obtained.

The rotation transmitting element 14 can be provided on both opposite longitudinal sides 3, 4 of the outer frame or on a single longitudinal side 3 of the outer frame. Since a single rotation transmitting member 14 allows the height of the entire cross member 7 to be adjusted along its entire length, it is no longer necessary to adjust the height on both sides of the outer frame. This reduces the risk of erroneous installation, that is, installation of different height at both ends of the transverse girder and therefore the risk of an unstable mattress supporting structure.

The number of faces of the crossbar determines the maximum number of different positions in height of the rotating crossbar with respect to the outer frame. By allowing only a limited number of height positions, the best orthopedic recommendation can be given to the consumer. Furthermore, a mattress support system 1 with a limited number of height positions also allows the user to install the height of the rotating crossbar by himself, with a reduced risk of incorrect installation. The rotatable cross member 7, as shown in Figures 2A and 2B, makes it possible, for example, to place the upper face of the cross member in four different height positions with respect to the outer frame. Preferably, the different height positions are chosen such that they are a multiple of each other. The first face 10 of the crossbar can be positioned, for example, at a 4x distance from the eccentric axis of rotation, the second face 11 of the crossbar, at a 3x distance, the third 9 face of the crossbar, at a 2x distance, ...

In Figure 1A, two rows of springs 13 are supported by a cross member face, but any other number of rows of springs considered suitable by a person skilled in the art can be provided atop one side of the cross member.

The surface of the faces 8, 9, 10, 11 of the cross member can be flat as shown in figure 3 or curved. Preferably, the surface of the crossbar faces is curved such that the maximum of the curve is located, for each of the crossbar faces, on a line perpendicular to the horizontal plane of the mattress supporting structure and passing through the center of eccentric axis of rotation. In this way, the maximum of the upper face of the crossbar remains in the same position, regardless of the specific position in height and thus regardless of which of the crossbar faces is positioned higher. Such a curved surface allows the height of the cross member to always be installed in exactly the same transverse position with respect to the outer frame.

The width of the different faces 8, 9, 10, 11 of the rotating crossbar 7 can be equal to each other, as shown in Figures 2A and 2B, or it can vary. Preferably, the width of the different faces 8, 9, 10, 11 of the rotating beam is large enough to provide a large contact surface with the springs 13. A large contact surface between the springs 13 and the face 8, 9, 10, 11 of the cross member is preferred because this provides a more stable mattress supporting structure 1, which presents better resistance against dynamic and static forces exerted on the support system. bed. However, the width of the different faces of the rotating beam is limited, because the greater the width, the higher the supporting structure of the mattress, which is not always desired.

The rotation transmitting element 14 of the height adjustment system is movable between a first and a second position. Said first position 20 is provided to rotate said at least one rotary cross member around its eccentric axis and said second position 21 is provided to lock said at least one rotary cross member in a desired position in height with respect to the outer frame. Said locking part 21 of said rotation transmitting element 14 is accessible from outside the outer frame, which means that the rotating cross member can be locked in a desired height position without removing part of the supporting structure of the mattress. The locking portion 21 provides the bed system with a more stable adjustable support system compared to the prior art and prevents the rotating cross member from lowering to its lowest position after being rotated by the rotation transmitting element 14.

Said rotation transmitting member 14 may form part of the rotating cross member 7 itself, for example, in the form of at least one positioning means cooperating with corresponding positioning means of the outer frame of the mattress supporting structure or of another part of the support system. height adjustment. The rotation transmitting element 14 is preferably provided as a separate member, comprising at least

ES 2 371 697 T3 minus a blocking region 21 that cooperates with a corresponding region 25 of the outer frame of the mattress supporting structure or another part of the height adjustment system.

The mattress supporting structure 1 as shown in Figures 1A and 1B comprises a number of cross members 7 rotatable along the outer frame. Said rotating beams 7 preferably extend parallel to each other as shown in Figures 1A and 1B, but may extend at any other angle to each other considered suitable by a person skilled in the art. A plurality of rotatable cross members 7 may be arranged along the entire outer frame 2, as shown in Figures 1A and 1B, or only along one or more specific regions. In the latter case, said mattress supporting structure comprises a first region, which includes one or more fixed crossbars, which extend between opposite longitudinal sides of the mattress support structure, and comprises a fixed upper crossbar, which has a fixed position in height with respect to the outer frame and that is provided with a supporting surface for at least one row of springs, and a second region, comprising one or more rotating cross members, extending between opposite longitudinal sides of the mattress support structure, and comprising an upper cross member that has a height adjustable position relative to the outer frame and that is provided with a support surface for at least one row of springs. The springs are preferably in direct contact with the upper face of the cross member. Said plurality of rotatable cross members are preferably disposed at least between the head and hip regions of the outer frame, that is, the region of the mattress support structure that is provided to support the head and hip, respectively. These regions are at least preferred because the parts of the human body envisioned in these regions, ie head, shoulders, chest, kidneys or lower back and hips require different support, which may even vary during your lifetime. Figure 1B shows a mattress supporting structure, comprising a number of rotating transverse beams 7 extending in parallel, provided along the entire length of the outer frame 2 at a mutual distance "d", the height of the upper faces 11 of the cross member of the different cross members 7 rotating with respect to the outer frame 2 differ as a function of the relative height position of that part of the human body in rotation with respect to the profile of the body, that is, the amount of support or relief that is needed for that part of the human body, which rests on top of that crossbar.

According to a preferred embodiment of the bed system according to the present invention, the cross section of the rotating cross members 7 provided along the outer frame 2 differs. As explained above, the type of cross section of a rotatable crossbar 7, and as such the number of faces 8, 9, 10, 11 of the crossbar determines the maximum number of height positions of said specific rotary crossbar 7. By adjusting the cross section of different rotatable cross members 7 along the length of the outer frame, the height of the bearing surface can be adjusted for different parts of the human body. This makes it possible, for example, to provide the mattress-supporting structure 1 with rotating crossbars with a pentagonal cross section, that is, a greater number of crossbar faces, in those regions that receive parts of the human body that are likely to vary greatly. over time, such as the hips and kidneys as a result, for example, of pregnancy, and rotating cross-members of triangular cross-section, that is, fewer stringer faces, in those regions that receive body parts that are likely to be less susceptible to change greatly over time.

The bed system according to the present invention preferably comprises a modular height adjustment system, comprising one or more different parts that can be removably mounted to the outer frame and / or to the rotating cross member. Such a modular system has the advantage that it results in low long-term cost to the consumer. If one of the height adjustment parts is damaged, it is not necessary to discard the entire mattress support structure or the entire outer frame or rotating cross member, but it is sufficient to replace only the part of the system that has been damaged. Another advantage of such a modular height adjustment system is that the modular design allows different parts to be manufactured separately. It can even allow different parts to be manufactured in different places and / or in different countries and / or in different companies, which means that parts can be manufactured at the lowest possible cost. A modular height adjustment system also simplifies the manufacturing process of the overall system.

A preferred embodiment of a modular height adjustment system is shown in Figure 3.

The modular height adjustment system preferably comprises a connector 14, which functions as a rotation transmitting member and which is provided to transmit a rotation of said at least one rotating cross member 7 around its eccentric axis of rotation and which is provided to cooperate with the outer frame. A preferred embodiment of the connector 14 is shown in Figure 3 and, in detail, in Figure 4. The connector 14 shown in Figure 4 comprises a protrusion, which fits into an opening in a longitudinal side of the outer frame and extends at least partially into the interior of the outer frame. The projection shown in Figure 4 takes the shape of a hollow cylinder, although any other shape deemed suitable by a person skilled in the art is possible. The cylinder does not necessarily need to be hollow but can be, for example, a solid cylinder comprising a recess 15 that is accessible from outside the outer frame. A hollow cylinder has the advantage that it is lighter, is easily accessible from the outside, and can be adjusted

ES 2 371 697 T3 directly in and on a part, which extends in the longitudinal direction of the eccentric axis of the rotating beam to which it is connected. The hollow cylinder comprises a first connector region 16 cooperating with a corresponding first region 30 of a rotatable cross member 7 shown in Figure 6. The first connector region 16 as shown in Figure 4 comprises a number of alternating first grooves 18 and projections 17 that cooperate with corresponding second projections and grooves of the rotating beam. The first connector 16 and the cross member region 30 may comprise any other type of cooperating positioning means considered suitable by a person skilled in the art, such as cooperating circular grooves in the first region of the connector, cooperating with a corresponding circular protrusion of the first region of the crossbar. Due to those first cooperating connector and cross member region, a rotation of said hollow connector cylinder will become a rotation of said rotary cross member about its eccentric axis.

The hollow cylinder further comprises a retaining member 15, which is accessible from outside the outer frame and which is provided to rotate said connector and said at least one cross member to which it is connected about its eccentric axis of rotation. The retaining member 15 may be in the form of a recess provided in the hollow cylinder or any other type of retaining member deemed suitable by a person skilled in the art. Rotation can be achieved, for example, by inserting a key into the hollow cylinder and rotating it as shown in figure 3. In order to prevent the hollow projection part from passing completely through the outer frame into the outer frame, the projection The hollow is preferably held by a plate that is larger than the opening in the outer frame as shown in Figures 3 and 4.

Said hollow cylinder further comprises a second connector region 19, provided adjacent to the first connector region 16 and preferably in a position closer to the outer frame 2. The second connector region 19 comprises an installation part 20, which allows said connector and said rotary crossbar to be rotated, and a locking part 21 that allows said connector and said rotary crossbar to be locked in the desired position. The installation part 20 shown in figure 4 comprises a smooth cylindrical part and allows said connector to rotate freely. Any other type of installation part considered suitable by a person skilled in the art is possible. The locking part 21 shown in figure 4 is a corrugated part comprising a number of recesses 23 and alternating projections 22, which have been arranged to cooperate with the corresponding projections 26 and grooves 27 of the outer frame 2 or any other part of the modular system height adjustment, as shown in figure 5. The alternation of these projections 22, 26 and recesses 23, 27 is preferably such that the rotatable cross member 7 can be locked in the number of height positions determined by the number of faces of the transverse beam. Preferably, the installation part 20 is provided as close as possible to the outer frame 2, while the locking part 21 is provided at a further distance from the outer frame 2 as shown in Figures 3 and 4.

The use of a connector 14 has the advantage that it functions both as a rotation transmitting member, intended to rotate said at least one rotary cross member around its eccentric axis, as well as part of the locking mechanism provided to lock said at least one rotating crossbar in a desired height position. The connector shown in figure 4 thus provides, in a very compact way, a suitable height adjustment system for adjusting and locking the desired height of the rotating crossbar 7. On the other hand, it does not negatively influence the height and weight of the entire mattress support system 1.

The connector 14 shown in Figure 4 can be housed directly in a hole in the outer frame 2 or it can be fitted in a box 24 which is mounted directly in a hole in the outer frame 2. Figures 3 and 5 show a preferred embodiment of a box 24, which is intended to be mounted directly in a hole in a longitudinal side 3 of the outer frame 2. The box 24 comprises a recess part that is provided to receive the protrusion of the connector. The recess part of the case shown in Figure 5 comprises a hollow cylindrical case part, which is provided to receive the hollow cylindrical projection of the connector. However, any other recess portion of the box considered suitable by a person skilled in the art is possible, provided that it is capable of receiving the protrusion of the connector. Said hollow cylindrical case part comprises a case blocking part provided to cooperate with the blocking part 21 of the connector 14 to block the at least one rotatable cross member in a desired position. The locking part 25 of the box 24 shown in Figure 5 comprises a number of alternating projections 26 and recesses 27, which are provided to cooperate with the corresponding projections 23 and recesses 22 of the locking part 21 of the connector 14. By inserting the connector 14 into the box 24 and pushing its smooth cylindrical portion 20 behind the locking portion 25 of the box, the connector 14 can rotate freely and a desired height can be installed. By pulling the connector 14 back towards the outer frame 2, after being rotated, the locking part of the connector 21 will fit into the locking part 25 of the case and the desired height position will be installed. The use of a box 24 has the advantage that it is not necessary to replace the entire outer frame in the event of damage to the cooperating recesses and projections, resulting in lower replacement costs. Preferably, the shape of the projections 26 of the locking part of the box are designed in such a way that the connector can only be mounted in the box in a way that is possible in such a way that the risk of erroneous installation of the modular adjustment system in height can be minimized.

ES 2 371 697 T3

The connector 14 of the modular height adjustment system may be directly connected to a rotatable cross member 7 or it may be connected to a beam member 28 mounted on an end portion of the rotatable cross member 7. The use of a joist member 28 is preferred because it results in lower replacement costs and is capable of absorbing some of the forces exerted on the rotatable cross member 7 by the connector 14. The connection between the joist member 28 and the connector 14 may be facilitated by any set screw means, which is arranged to connect the connector 14 and the joist member 28 (not shown). A preferred embodiment of a joist member 28 for use in a modular height adjustment system is shown in Figures 3 and 6. The beam member 28 shown in Figure 6 comprises a first face that mounts to an end portion of the rotary beam and a second face, opposite the first face, comprising means 30 for cooperating with the first region 16 of the connector. The cooperating means 30 may be any means considered suitable by a person skilled in the art. The cooperating means 30 as shown in figure 6 comprises a projecting part 29, which extends in the longitudinal direction of the eccentric axis and which is accessible from outside the outer frame. Preferably, said projecting portion 29 comprises a recess which is arranged to receive at least part of the first region 16 of the connector 14 as shown in Figures 3 and 6. The cooperating means can also be, for example, a recessed part that cooperates with a projecting part of the connector. The use of a beam member 28 has the advantage that it can be done separately from the rotatable cross member 7. Another advantage is that it again results in lower replacement costs, because the entire rotating cross member 7 does not need to be replaced in case there is damage to the receiving part of the first connector region. The rotatable cross member 7 may comprise a beam member 28 on one longitudinal side of the outer frame or on both longitudinal sides as shown in Figure 3.

Preferably, said height adjustment system further comprises a supporting member 31, which comprises a recess 32 for receiving and supporting at least a part of said projecting part 29 of said joist element and which is arranged to be mounted on an inner side of the outer frame of said mattress support system 1, and which is provided to drive the rotation of said at least one rotary crossbar 7. A preferred embodiment of such a beam support member is shown in Figures 3 and 7. The beam support member shown in Figure 7 is a U-shaped member, comprising a U-shaped recess and being connected on a first face to the inner side of the outer frame such that the hole in the outer frame extends between the U-shaped recess 32 of the beam supporting member 31. However, any other type of shape of the beam support member and recess considered suitable by a person skilled in the art is possible. The U-shaped recess is provided to receive and support the projecting portion 29 of the beam member 28 or of the rotatable cross member 7, which is arranged to receive the first region 16 of the connector 14 and drive the rotation of said at least one cross member. 7 rotary. Such a support member of the beam has the advantage that it is capable of absorbing part of the forces exerted on the supporting structure of the mattress and, in particular, on the rotating cross members 7. Preferably, said beam supporting member comprises a noise absorbing layer provided to absorb at least part of the noise produced by friction between the connector and / or the projection of the beam member or the rotating beam itself and the supporting member of the joist. Preferably, said U-shaped recess further comprises a bushing 33 arranged to reduce the displacement of the projection in the height direction of the outer frame as shown in Figure 7. The support member of the beam can be provided at one end of the rotary beam such as shown in figure 7.

Preferably, said height adjustment system further comprises a transition system that allows the transition from the installation part to the blocking part of said second region of the connector and vice versa. Preferably, said transition system comprises a resilient construction 34 mounted between said connector and said beam member or said rotatable cross member as shown in Figure 3. The elastic construction 34 can be mounted in any position with respect to the connector, for example, inside or outside the hollow cylinder of the connector. In case the connector is connected by means of a screw fixed to the rotating cross member or girder element, the spring is preferably mounted in such a way that it surrounds at least a part of the screw. By pushing the connector 14 towards the rotating cross member 7, the spring is compressed between part of the connector and part of the beam member and the connector 14 is pushed with its locking part 21 out of the corresponding locking part 25 of the box 24 or of the frame 2 Exterior. The connector 14 can then be freely rotated and a desired height position of the rotating beam can be established. After the rotation of the connector 14, the elastic construction 34 automatically pushes the connector 14 back towards the outer frame 2 so that its locking part 21 fits into a corresponding locking part 25 of the case 24 or the outer frame 2, so that the desired position in height is locked. Consequently, such a transition system and, in particular, such an elastic construction 34 makes it possible to obtain in one step a height adjustment and a lock of the desired height.

Preferably, said modular height adjustment system comprises an indicative system 35, which is mounted on the connector and which is visible from outside the outer frame 2 and which is provided to visually indicate the position in height of at least the rotating cross member 7 . Such an indicative system 35 has the advantage that the user, who wishes to adjust the height of the mattress supporting structure 1 in a specific place, observes directly what is the specific position in height of the rotating crossbar 7. Such a visual feeding system 35 also allows the producer to provide the user with an orthopedic recommendation and to view it. The indicative system 35 may take the form of an annular circular member as shown in Figure 3, dividing into a number

ES 2 371 697 T3 different colors, corresponding to the number of different height positions that are possible. In Figure 3, the indicative system 35 comprises four colors corresponding to the four height positions of the quadrangular rotary crossbar connected to the height adjustment system. The indicator system 35 may, however, be any other type of indicator system 35 suitable for a person skilled in the art. It can be completely visible from the outside or only that part that indicates the specific height. The indication can be made by colors, numbering or any other type of indication that can be used.

The different parts of the modular height adjustment system of the supporting structure of the mattress according to the present invention can be made of any material considered suitable by a person skilled in the art, such as a plastic material, a metallic material or a wooden material.