Back-held carrying device, in particular for a battery pack

0001The invention relates to a back carrying device, which comprises a carrying base, a carrying belt unit for the carrying base and a holding device for releasably holding the battery pack in a carrying position on the carrying base. wherein the holding device comprises a docking device on the support base for pivotal docking of the battery pack in a docking position and a retaining device on the support base for holding the battery pack in the support position pivoted toward the support base relative to the docking position, and on a device set with such a back carrying device.

0002The support base serves to receive an object to be carried, for example by attaching the object to the support base or by introducing the object into a receiving space of the support base. The carrying belt unit is used so that a user can carry the carrying base with the object on or in it on the back.

0003The back carrying device can be designed in particular for carrying a battery pack, in particular a portable battery pack for the electrical energy supply of hand-held electrical devices, in particular electrically driven gardening and / or forestry equipment. In the present case, hand-held electrical devices are to be understood to mean, above all, electrical devices which are hand-carried or ground-guided, in particular those which are used for gardening and / or forestry work, such as chain saws, hedge trimmers, leaf blowers, sweepers, lawn mowers and scarifiers, to name just a few application examples . The battery pack is designed to be carried by the user on the back by means of the back support system and provides the electrical energy that the electrical appliance needs in use, for which purpose it has suitable battery cells, which are understood to mean any conventional battery cells. The battery cells are typically arranged to form a battery cell block.

0004In the application for carrying a battery pack, the back carrying device has a holding device for detachably holding the battery pack in a carrying position on the carrying base. Various fastening or holding mechanisms are known for the holding device. In one of these known types, the battery pack is in a translational approach movement to the support base, for example can be formed by a plate-like supporting structure, applied and then brought into the supporting position in a displacement movement perpendicular to the approach movement, for example from top to bottom, see for example the published documents <patcit id="pcit0001" dnum="US20160345714A1"><text>US 2016/0345714 A1</text></patcit> and <patcit id="pcit0002" dnum="WO2018007111A1"><text>WO 2018/007111 A1</text></patcit> as well as the utility model documents <patcit id="pcit0003" dnum="DE202012013284U1"><text>DE 20 2012 013 284 U1</text></patcit> and <patcit id="pcit0004" dnum="DE202013011447U1"><text>DE 20 2013 011 447 U1</text></patcit>. Unless otherwise stated, reference is made here to the orientation of the back carrying device when it is on the back of a user, or the orientation of the battery pack in its carrying position when the back carrying device is on the back of a user, unless otherwise stated. In the alternative type considered here, the holding device has a docking device on the support base for pivotally docking the battery pack in a docking position and a holding device on the support base for holding the battery pack in the support position pivoted toward the support base relative to the docking position.

0005The disclosure <patcit id="pcit0005" dnum="EP2819207A1"><text>EP 2 819 207 A1</text></patcit> discloses such a holding device according to the preamble of claim 1, wherein there the docking device is formed by an upper edge of the support base, which can be overlapped by a hook-shaped design of an upper edge of the battery pack in such a way that a certain pivoting mobility of the battery pack relative to the support base with the top edge of the support base is retained as the pivot axis. Two retaining projections arranged laterally in the lower area act as a holding device on the carrying base, which cooperate with corresponding counter-locking projections in the lower side area of ​​the battery pack to form a snap-fit ​​connection, a handle being arranged on the bottom side of this battery pack, i.e. on its carrying position on the Lower back of a user.

0006The carrying strap unit of the back carrying device usually comprises a shoulder strap unit as a carrying aid for the user. For corresponding applications, it is also favorable if the riser belt unit has a lap belt unit. In a typical back support device of this type, the carrying belt unit additionally has a joint unit which connects the lap belt unit to the supporting base in an articulated manner. In the utility model already mentioned<patcit id="pcit0006" dnum="DE202013011447U1"><text>DE 20 2013 011 447 U1</text></patcit> the joint unit consists of a joint via which a cross member is pivotally coupled to the support base about a substantially horizontal pivot axis perpendicular to a plane of the plate-shaped support base, the cross member serving as a fastening for a lap belt. At one in the published application<patcit id="pcit0007" dnum="DE102015002724A1"><text>DE 10 2015 002 724 A1</text></patcit> disclosed back support device, the joint unit consists of a joint, preferably formed by a fabric / film hinge, with which the lap belt unit is pivotally connected to the support base about a substantially horizontal pivot axis parallel to a plane of the plate-shaped support base. This is intended to enable the lap belt unit to be folded in when the back support device is parked, and in this way to prevent the lap belt unit from obstructing the upright parking of the back support device.

0007Furthermore, back-carrying devices of the type mentioned at the outset are known, in which the carrying belt unit has at least one shoulder belt unit which can be detachably connected to the carrying base and which can be adjusted for the purpose of height adjustment of the carrying base. Conventionally, this is usually achieved by using a belt strap for a respective shoulder strap of the shoulder strap unit, the length of which can be adjusted.

0008The invention is based on the technical problem of providing a back carrying device of the type mentioned at the outset, which is improved compared to the above-mentioned carrying devices of the prior art, in particular with regard to the type of fastening of a battery pack to the support base, and an equipment set equipped with such a carrying device.

0009The invention solves this problem by providing a back support device with the features of claim 1 and a device set with the features of claim 14. Advantageous developments of the invention are specified in the subclaims, the wording of which is hereby made part of the description by reference.

0010According to the invention, the back carrying device is set up so that a user can carry a battery pack with it for the electrical energy supply of hand-held electrical devices on the back, which can be, in particular, electrically driven gardening and / or forestry tools. For this purpose, the back carrying device includes a carrying base, a carrying belt unit for the carrying base and a holding device for releasably holding the battery pack in a carrying position on the carrying base, the holding device comprising a docking device on the carrying base for pivotably docking the battery pack in a docking position and a holding device on the carrying base Holding the battery pack in the support position pivoted in relation to the docking position towards the support base. Characteristically, the docking device is arranged on a lower region of the support base.

0011On the basis of these features of the backpack device, the battery pack can be coupled to the backpack device in a very advantageous manner. For this purpose, it is docked to the lower area of ​​the support base using the docking device and can then be pivoted in towards the support base in order to reach the support position. If the battery pack is provided with a handle on its upper side, it can be held by the handle while it is docked to the lower region of the supporting base and then swung into the supporting position towards the supporting base.

0012The handling of the battery pack when attaching and detaching to or from the back support device can be limited in this way to the upper area of ​​the battery pack and the back support device, the user does not necessarily have to take any handling measures on the lower area of ​​the battery pack and the back support device. This usually makes handling easier for the user if he wants to attach the battery pack to the back-rest device placed on the floor or on a storage surface . In addition, that side of the support base on which the battery pack is to be attached remains clearly visible after the battery pack has been docked on, which can make it easier for it to pivot into the support position. Docking the battery pack on the lower area of ​​the support base is also advantageous for reasons of stability in that the tilting moment for the back carrying device associated with the docking of the battery pack can be kept low, in particular significantly less than in the case of docking the battery pack on a middle or even upper area the support base.

0013According to one aspect of the invention, the holding device has a holding slider, which is displaceably arranged on the carrying base between a release position and a holding position, with a holding hook which is designed for gripping behind a corresponding holding element of the battery pack in the carrying position. This represents a structurally simple and functionally advantageous realization of the holding device. When the battery pack is not docked, the holding slide is in the holding position, and it has a run-on slope which is designed to automatically move the holding slide when the battery pack docked on the support base is pivoted in the direction of the carrying position in the direction of the release position by interaction with the holding element of the battery pack. With this measure, the holding slide can be automatically moved out of the holding position by pivoting the battery pack into its carrying position, without the user having to operate it separately. In this case, the holding slide can preferably be prestressed in the direction of the holding position by a corresponding elastic prestressing element. The holding slide is then moved into the release position against the action of the biasing element when the battery pack is pivoted into its carrying position, and as soon as the battery pack has reached its carrying position, the biasing element can automatically return the holding slide to its holding position. According to an alternative aspect of the invention, the holding device has a holding lever which is arranged on the support base between a release position and a holding position and can be pivoted, with a holding bracket which is designed for gripping behind a corresponding holding element of the battery pack in the carrying position. This also represents a structurally simple, technically favorable and functionally reliable implementation of the holding device.

0014In a development of the invention, the docking device provides a pivot axis which is substantially parallel to an underside of the support base for the pivoting movement of the battery pack into the support position. This further contributes to optimizing the handling of the battery pack when assembling and disassembling the back support device.

0015In a development of the invention, the retaining bracket has an arcuate running surface with a non-constant distance from a pivot axis of the retaining lever, against which the retaining counter-element can be placed at a distance from the pivot axis, which decreases with increasing pivoting of the retaining lever in the direction of the retaining position. This makes it easier to swivel the battery pack securely into its carrying position on the carrying base. In particular, this special kinematics of the holding lever enables an optimal force profile of the pivoting force or holding force exerted on the battery pack. The contact surface preferably extends at least in an area on the entry side with the decreasing distance from the pivot axis, in corresponding embodiments over its entire length to its end point corresponding to the holding position of the holding lever or alternatively only to a point spaced from the end point, from which their distance from the swivel axis to the end point or at least over part of this remaining length of the contact surface no longer decreases.

0016In a further development of the invention, the retaining bracket has an abutting surface that runs in an arc shape with a non-constant distance from a pivot axis of the retaining lever, against which the retaining counter-element can be placed at a distance from the pivot axis, whereby the contact surface extends from a starting point to an end point corresponding to the holding position of the holding lever and a distance between a contact point of contact of the contact surface with the holding counter element decreases with increasing pivoting of the holding lever in the direction of the holding position from the starting point until a turning point of the contact surface is reached, and the contact surface at the turning point to provide a reversal of one from the holding counter element to the Holding lever exercisable torque is set up from a torque acting in the direction of the release position to a torque acting in the direction of the holding position. This special kinematics of the holding lever enables an optimal force profile of the pivoting force exerted on the battery pack or Holding force, and the special torque reversal on the holding lever at the turning point can ensure that the holding lever experiences a torque in the direction of its holding position when a force pointing in the direction of the docking position acts on the battery pack, if it reaches the end point of the turning point directly at the turning point Contact surface facing side. The latter has the result that such a force effect on the battery pack does not lead to a further pivoting out of the battery pack, but rather the holding lever holds the battery pack in the position which corresponds to the position of the holding counter-element at the turning point of the contact surface.

0017In a development of the invention, the holding lever has an ejector contour which is set up to exert an ejector force acting in the direction of the docking position on the battery pack when the holding lever is pivoted in the direction of the release position. This measure has the advantage that the pivoting of the holding lever in the direction of the release position can support the pivoting out of the battery pack from its carrying position into its docking position, ie in this way, a swiveling aid is provided for swiveling the battery pack out of its carrying position into its docking position.

0018In one embodiment of the invention, the ejector contour has an ejection pressure surface acting on a counter abutment surface of the battery pack on a side of the retaining bracket facing away from the contact surface and / or an ejection pressure surface acting on the counter-holding element of the battery pack on a side of an ejector cam of the retaining lever facing the contact surface. Both measures, either individually or in combination, represent advantageous implementations for providing the ejector force on the battery pack by the holding lever. In the combined implementation, the two ejection pressure surfaces can complement one another, depending on the system design, in such a way that they are effective or at least effective in different pivoting ranges of the holding lever are simultaneously effective in a partial area of ​​the entire pivoting movement of the holding lever.

0019In a development of the invention, the holding slide or the holding lever has a user-operated control element, which is located on a side of the supporting base that faces away from a battery pack coupling side of the supporting base. This simplifies handling for the user when moving the battery pack from its docking position to its carrying position. To do this, the user can use the Operate the holding lever from the side of the support base that faces away from the side of the support base for coupling the battery pack. This operation is therefore not hindered by the docked battery pack.

0020In a further development of the invention, the holding device has a support spring arrangement which provides an elastic support with a spring force acting in the pivoting direction for the battery pack in the carrying position. This contributes to the secure, play-free holding of the acupack in its support position on the support base. Since the spring force of the support spring arrangement acts on the battery pack in the pivoting direction away from the support base, the support spring arrangement can prevent the battery pack from being struck undesirably against rigid parts of the support base. A swivel lock is expediently used to block swiveling out of the battery pack due to the spring force of the support spring arrangement. This swing-out lock can be released if the user removes the battery pack from the carrying base and first wants to swing it out of its carrying position into its docking position. The holding slide or the holding lever preferably functions as such a swing-out lock; alternatively, a separate swing-out lock can be provided.

0021In a development of the invention, the back support device comprises a support base and a support belt unit for the support base, wherein the support belt unit has a shoulder belt unit, a lap belt unit and a joint unit, which connects the lap belt unit to the support base in an articulated manner. The joint unit includes a double joint, through which the lap belt unit is pivotally connected to the support base about two pivot axes, one of the two pivot axes running essentially parallel to a plate plane of the support base and the other pivot axis essentially perpendicular to the plate plane of the support base.

0022This represents a very advantageous implementation for a pivoting pivoting of the lap belt unit on the support base about two axes, without the need for two individual joint units and without two such joints being able to interfere with one another. By means of this double joint, the lap belt unit can be pivoted to the desired extent relative to the support base both about the pivot axis which is essentially parallel to the support base plate level and also about the pivot axis which is essentially perpendicular to the support base plate level. Both swiveling movements are advantageous for providing corresponding evasive movements of the lap belt unit relative to the support base.

0023In one embodiment of the invention, the joint unit and thus also the double joint is formed by an independent component which is fastened on the one hand to the lap belt unit and on the other hand to the support base. Such a joint unit can be manufactured with high resilience and durability and does not restrict the choice of material for the lap belt unit and the support base.

0024In one embodiment of the invention, the one pivot axis runs essentially between and parallel to two mutually facing side edges of the lap belt unit on the one hand and the support base on the other hand, and the other pivot axis is offset with respect to this pivot axis in a direction facing away from the lap belt unit. This results in advantageous kinematics for the pivoting mobility of the lap belt unit relative to the support base.

0025In a further development of the invention, the back support device comprises a support base and a support belt unit for the support base, the support belt unit having at least one shoulder belt unit which can be detachably connected to the support base. Characteristically, the shoulder belt unit in this development comprises at least one rigid belt holder, which can be detachably latched to the support base in several different heights by means of a latching mechanism, and at least one flexible belt strap connected to it. The rigid construction of the belt holder enables a very stable connection of the shoulder belt unit to the support base. The possibility of being able to detachably latch the belt holder at several different heights to the support base provides an advantageous height adjustment for the shoulder belt unit. In contrast to the belt holder, the flexible, non-rigid design of the belt straps allows the back carrying device to be carried comfortably by the user in the usual way.

0026In one embodiment of the invention, the latching mechanism provides a plurality of latches for the at least one belt holder at different heights on the support base, the respective latching comprising a latching release position and a latching holding position offset upwards relative to the latching release position, between which the belt holder can be displaced in height on the support base . In the locking release position, the belt holder can be attached to the support base at the desired height or can be removed from this. In the latching position, the belt holder is connected to the supporting base so that it cannot detach from the supporting base. To release the belt holder from the support base, the belt holder must be moved down into the latching release position. The upward offset arrangement of the latching holding position with respect to the latching release position has the advantage that a weight force acting downward on the support base cannot lead to the belt holder being inadvertently shifted into the latching release position. Rather, this weight of the support base acts in the direction of the belt holder remaining securely in the latching position.

0027In one embodiment of the invention, the latching mechanism has an unlockable latching latch, which holds the belt holder locked in the respective latching holding position. Only after unlocking this locking by the user can the belt holder on the support base be shifted down into the latching release position and then removed from the support base or reattached to it at a different height. This is an additional safeguard for the height-adjustable bracket of the belt holder on the support base.

0028In a further aspect, the invention provides a device set that includes a back carrying device according to the invention and a back pack that can be attached to it, for the electrical power supply of hand-held electrical devices, in particular electrically driven gardening and / or forestry tools. The battery pack can in particular be one such as the one in the applicant's European patent application with application number<patcit id="pcit0008" dnum="EP18194901A"><text>18194901.7</text></patcit> is disclosed, the content of which is hereby fully incorporated by reference into the disclosure of the present application.

0029In one embodiment of the invention, the device set additionally comprises a hand-held electrical device that can be supplied with electrical energy by the battery pack.

0030Advantageous embodiments of the invention are shown in the drawings. These and further advantageous embodiments of the invention are specified and described in more detail below. Here show:<ul id="ul0001" list-style="none"><li><figref idref="f0001">Fig. 1</figref> a perspective front view of a back support device,</li><li><figref idref="f0001">Fig. 2</figref> a rear perspective view of the back support device,</li><li><figref idref="f0002">Fig. 3</figref> a detailed view of an area III in <figref idref="f0001">Fig. 2</figref>,</li><li><figref idref="f0002">Fig. 4</figref> 2 shows a longitudinal sectional view of a back carrying device with a holding lever and a battery pack coupled in the docking position,</li><li><figref idref="f0003">Fig. 5</figref> a detailed view of an upper part of <figref idref="f0002">Fig. 4</figref>,</li><li><figref idref="f0003">Fig. 6</figref> the view of <figref idref="f0002">Fig. 4</figref> with the battery pack in the carrying position,</li><li><figref idref="f0004">Fig. 7</figref> the view of <figref idref="f0003">Fig. 5</figref> with the battery pack in the carrying position,</li><li><figref idref="f0004">Fig. 8</figref> 1 shows a perspective cutout view of a connection area of ​​a lap belt unit and a shoulder belt unit of a back carrying device,</li><li><figref idref="f0005">Fig. 9</figref> a view accordingly <figref idref="f0001">Fig. 1</figref> with an omitted strap,</li><li><figref idref="f0005">Fig. 10</figref> a view accordingly <figref idref="f0005">Fig. 9</figref> with omitted belt straps and partially omitted lap belt unit,</li><li><figref idref="f0006">Fig. 11</figref> the rear view of the back carrier of <figref idref="f0005">Fig. 10</figref>,</li><li><figref idref="f0006">Fig. 12</figref> a view accordingly <figref idref="f0003">Fig. 5</figref> for a back support device with holding slide,</li><li><figref idref="f0007">Fig. 13</figref> a rear perspective view of a portion of the back support device of the holding slide of FIG <figref idref="f0006">Fig. 12</figref>,</li><li><figref idref="f0007">Fig. 14</figref> is a schematic sectional view of the area of <figref idref="f0007">Fig. 13</figref> with the battery pack from <figref idref="f0006">Fig. 12</figref> in docking position,</li><li><figref idref="f0008">Fig. 15</figref> the view of <figref idref="f0007">Fig. 14</figref> with the battery pack in the carrying position,</li><li><figref idref="f0008">Fig. 16</figref> a detailed sectional view of a back carrying device similar <figref idref="f0003">Fig. 5</figref> with a modified locking lever with contact point turning point and swiveling aid in a swivel position at the level of a contact point turning point,</li><li><figref idref="f0009">Fig. 17</figref> the view of <figref idref="f0008">Fig. 16</figref> with the holding lever in a pivoting position directly behind the turning point,</li><li><figref idref="f0009">Fig. 18</figref> the view of <figref idref="f0008">Fig. 16</figref> with the holding lever in a holding position,</li><li><figref idref="f0010">Fig. 19</figref> the view of <figref idref="f0008">Fig. 16</figref> with the holding lever in a first swing-out position,</li><li><figref idref="f0010">Fig. 20</figref> the view of <figref idref="f0008">Fig. 16</figref> with the holding lever in a second swivel position,</li><li><figref idref="f0011">Fig. 21</figref> the view of <figref idref="f0008">Fig. 16</figref> with the holding lever in a third swing-out position and</li><li><figref idref="f0011">Fig. 22</figref> is a schematic block diagram representation of a device set with back support device, battery pack and the latter powered electrical device.</li></ul>

0031One in the <figref idref="f0001 f0002 f0003 f0004 f0005 f0006 f0007 f0008 f0009 f0010 f0011">1 to 21</figref> Back support device illustrated in various representations and design variants can be used for carrying any items that can be carried on the back of a user. For this purpose, the back support device has a support base 3 which serves to receive the object to be carried, for example by attaching the object to the support base 3 or by introducing the object into a receiving space of the support base 3 analogously to that in the case of a conventional backpack. In advantageous implementations, the support base 3 has a plate-like structure, as shown. Alternatively, it can have any other structure, as are known per se to the person skilled in the art for this functional component of back support devices of the type considered here, which does not require any further explanation here. The back carrying device further includes a carrying belt unit 4 for the carrying base 3. With the carrying belt unit 4, the user can carry the carrying base 3 with the object on or in it on the back.

0032In corresponding embodiments, the back-carrying device is designed, as shown, to carry a battery pack 2, which in particular can be a back-portable battery pack for the electrical power supply of hand-held electrical devices, such as electrically driven gardening and / or forestry equipment. For this purpose, the back carrying device in such embodiments has a holding device 6 for releasably holding the battery pack 2 in a carrying position 7 on the carrying base 3.

0033The holding device 6 comprises a docking device 8 on the support base 3 for the pivoting docking of the battery pack 2 in a docking position AL, as shown, for example, in FIGS <figref idref="f0002">Fig. 4</figref>, <figref idref="f0003">5</figref>, <figref idref="f0006">12</figref> and <figref idref="f0007">14</figref> is shown, and a holding device 9 on the support base 3 for holding the battery pack 2 in the support layer 7 pivoted toward the support base 3 relative to the docking position AL, as is shown, for example, in FIGS <figref idref="f0003">Fig. 6</figref>, <figref idref="f0004">7</figref> and <figref idref="f0008">15</figref> is shown. The docking device 8 is arranged on a lower region 3c of the support base 3.

0034In corresponding designs, the docking device 8 provides a pivot axis S which is substantially parallel to an underside 3a of the support base 3_A ready for the pivoting movement of the battery pack 2 in the support layer 7, as is the case, for example, in FIGS <figref idref="f0002">3, 4</figref>, <figref idref="f0003">6</figref> and <figref idref="f0006">11</figref> can be seen. This pivot axis S is in advantageous implementations_A directly on the support base underside 3a or with only a relatively small vertical distance above it.

0035In a corresponding embodiment, the holding device 9 includes a holding slider 10, which is displaceably arranged on the support base 3 between a release position and a holding position 10a, with a holding hook 11 which is designed for gripping behind a corresponding holding element 19 of the battery pack 2 in the carrying position 7. Such an implementation is in the<figref idref="f0006 f0007 f0008">12 to 15</figref> illustrated. The release position, which is not explicitly shown, is located vertically above the holding position 10a shown.

0036In corresponding designs, when the battery pack 2 is not docked, the locking slide 10 is in the locking position 10a, and the locking slide 10 has a run-on slope 10b, which is designed to interact with the locking counter-element 19 of the battery pack 2 to hold the locking slide 10 when the docked battery pack is swung in 2 in the direction of the support position 7 to move automatically in the direction of the release position. Optionally, an elastic biasing element (not shown) is arranged on the support base 3, which biases the locking slide in the direction of its locking position 10a. When the battery pack 2 is pivoted into its carrying position 7, the holding slide 10 is then moved from its holding position 10a into its release position against the action of the biasing element, so that the battery pack 2 can be pivoted completely into its carrying position 7, after which the biasing element automatically moves the holding slide 10 into brings his holding position 10a back.

0037In corresponding implementations, the retaining hook 11 is as in the example in FIG <figref idref="f0006 f0007 f0008">12 to 15</figref> with an inner side 11a designed obliquely, so that it holds the retaining counter-element 19 of the battery pack 2 securely against forces acting in the pivoting direction in the manner of a catch hook. In other words, this inner bevel 11a of the retaining hook 11 counteracts the accidental sliding out of the battery pack 2 from its carrying position 7.

0038In an alternative embodiment of the holding device 9, it has a holding lever 12 which is pivotably arranged on the support base 2 between a release position 12b and a holding position 12a and has a holding bracket 13 which is designed to grip behind a corresponding holding element 20 of the battery pack 2 in the carrying position 7. Such a realization of the holding device 9 is in the<figref idref="f0001">1, 2</figref>, <figref idref="f0002 f0004">4th to 7</figref>, <figref idref="f0005 f0006">9 until 11</figref> and <figref idref="f0008 f0011">16 until 22</figref> to recognize.

0039In corresponding designs, the retaining bracket 13 has an arc shape as shown with a non-constant distance from a pivot axis S._H of the holding lever extending stop surface 13a. The retaining counter-element 20 of the battery pack 2 lies at a distance A from the pivot axis S._H of the holding lever 12 against the contact surface 13a of the holding bracket 13, this distance A decreasing with increasing pivoting of the holding lever 12 in the direction of the holding position 12a. In the embodiment of the<figref idref="f0002 f0003 f0004">4 to 7</figref> this distance A decreases over the entire length of the contact surface 13a to its end point corresponding to the holding position of the holding lever. This distance A in the support position 7 of the battery pack 2 or in the holding position 12a of the holding lever 12 is minimal, as in FIG<figref idref="f0004">Fig. 7</figref> shown, whereas it is significantly larger in the docking position AL of the battery pack 2, in which the battery pack 2 is located when its retaining counter-element 20 just reaches the area of ​​the holding lever 12 or its holding bracket 13, as in FIG <figref idref="f0003">Fig. 5</figref> shown. This represents an advantageous force characteristic for the force exerted by the holding lever 12 on the battery pack 2 during pivoting from the docking position AL into the carrying position 7.

0040Optionally, the holding lever 12, as for the embodiment of the <figref idref="f0002 f0003 f0004">4 to 7</figref> shown, be provided on its retaining end of the contact surface 13a with a locking shoulder 13b or the like in order to additionally secure the battery pack 2 in the carrying position 7 against unintentional pivoting out.

0041In corresponding designs, the holding slide 10 or the holding lever 12 has a user-operated control element 10c, 12c, which is located on a side VS of the carrying base 3 facing away from a battery pack coupling side AS of the carrying base 3. The coupling side AS can in particular be a rear side of the support base 3 facing away from the user's back, the side VS of the supporting base 3 facing away from the coupling side AS then being a front side of the supporting base 3 facing the back of a user when the back carrying device is being carried. The holding slide 10 or In this case, the holding lever 12 can be moved by the user through the operating element 10c, 12c on the front side RS of the support base 3 from the holding position 10a, 12a to the release position 12b in order to pivot the battery pack 2 out of its carrying position 7 into its docking position AL and to allow a subsequent removal of the battery pack 2 from the support base 3. In alternative designs, the retaining slide 10 or the holding lever 12 can be shifted in a different manner by the user from the holding position 10a, 12a into the release position 12b.

0042In corresponding designs, the holding device 6 has a support spring arrangement 14, which provides an elastic support with a spring force acting in the pivoting direction for the battery pack 2 in its carrying position 7. As a result of this support spring arrangement 14, the battery pack 2 can therefore resiliently bear against the support base 2 when it is in its support position 7, so that the support spring arrangement 14 absorbs impacts from the battery pack 2 onto the support base 3 and vice versa, or vice versa. can mitigate. In addition, the support spring arrangement 14 is suitable for holding the battery pack 2 in its support position 7 on the support base 2 without play. The support spring arrangement 14 can include, for example, an arrangement of one or more leaf springs arranged on the support base 3, as in FIGS<figref idref="f0006 f0007 f0008">12 to 15</figref> to recognize. In alternative embodiments, the support spring arrangement can, in addition or as an alternative to leaf springs, include an arrangement of one or more rubber buffers, in particular round rubber buffers, arranged on the support base.

0043In corresponding embodiments, the back support device comprises the support base 3 and the support belt unit 4 in an implementation in which the support belt unit 4 has a shoulder belt unit 5, a lap belt unit 15 and a joint unit which connects the lap belt unit 15 to the support base 3 in an articulated manner. The joint unit includes a double joint 16, by means of which the lap belt unit 15 is connected to the support base 3 such that it can pivot about two pivot axes GS1, GS2, as shown in particular in FIGS <figref idref="f0001">Fig. 1</figref> and <figref idref="f0004 f0005">8th until 10</figref> to recognize. The pivot axis GS1 runs essentially parallel to a plate plane P._T the support base 3, while the other pivot axis GS2 substantially perpendicular to this plate plane P_T the support base 3 runs. By means of this double joint 16, the lap belt unit 15 can thus be pivoted to the desired extent both laterally relative to the support base 3 about the preferably horizontal pivot axis GS1 in the direction of the front RS or rear side AS of the support base 3 and also about the preferably likewise horizontal pivot axis GS2. The joint unit or the double joint 16 is formed by an independent component which is fastened on the one hand to the lap belt unit 15 and on the other hand to the support base 3, as in the exemplary embodiment shown.

0044In advantageous embodiments, the pivot axis GS1 runs essentially between and parallel to two mutually facing side edges SK1, SK2 of the lap belt unit 15 on the one hand and the support base 3 on the other hand, as shown in particular in FIGS <figref idref="f0004 f0005 f0006">8 to 11</figref> can be seen, and the pivot axis GS2 runs with respect to this pivot axis GS1 offset in the direction facing away from the lap belt unit 15, in the exemplary embodiment shown specifically offset upwards. This results in optimal movement kinematics for the lap belt unit 15 relative to the support base 3 in corresponding applications. In corresponding implementations, the support base 3 forms a rigid or rigid component, alternatively it can be implemented as a flexible component.

0045In corresponding embodiments, the back carrying device includes the carrying base 3 and the carrying strap unit 4 in an implementation in which the carrying strap unit has at least one shoulder strap unit 5, which can be detachably connected to the carrying base 3. In these versions, the shoulder belt unit 5 comprises at least one rigid belt holder 17, which can be detachably attached to the support base 3 at a plurality of different heights by means of a latching mechanism 22 and comprises at least one flexible belt strap 18 which can be connected to the belt holder 17. In this case, the belt holder 17 consequently constitutes a rigid component that is rigid with respect to the flexible belt belt 18. The exemplary embodiments shown include this type of shoulder belt unit 5, as can be seen from the corresponding figures. In corresponding implementations, the shoulder belt unit 5 contains only one rigid belt holder, on which, for example, two flexible belt straps can be arranged for carrying by the user, or the shoulder belt unit 5, as shown, contains two rigid belt holders 17, with each of which a flexible belt strap 18 or a common belt strap is connectable.

0046In advantageous embodiments, the detent mechanism 22 provides a plurality of detents 23 for the at least one belt holder 17 at different heights on the support base 3. The respective detent 23 includes a detent release position 24 and a detent holding position 25 which is offset upwards relative to the detent release position. The belt holder 17 can be displaced in height on the support base 2 between the detent release position 24 and the detent holding position 25 of the selected detent 23. In the latching release position 24, the belt holder 17 can be attached to or removed from the support base 3 at the desired height. In the latching holding position 25, the belt holder 17 is connected in a latching manner to the support base 3 and thus secured against detachment from the support base 3. The belt holder 17 can only be released from the support base 3 if it is first shifted downward from the latching holding position 25 into the latching release position 24. This has the advantage that the weight of the support base 3, which acts downwards and therefore tries to move the support base 3 downward relative to the belt holder 17 held by the user via the remaining shoulder belt unit 5, does not inadvertently release the belt holder 17 from the support base 3 can cause. Rather, the belt holder 17 is held securely in its latching position 25 by the weight of the support base 3, which also includes the weight of an object held on or received by it.

0047In advantageous embodiments, the latching mechanism 22 has a latching lock 26 which holds the at least one belt holder 17 locked in the respective latching holding position 25. In the implementation shown, the latching lock 26 is formed by a locking button that can be unlocked by the user. If the user wants to release the locking of the belt holder 17 in its latching position 25 in order to be able to move the belt holder 17 from its latching position 25 into its latching release position 24, he presses the locking button.

0048In corresponding embodiments, the retaining bracket 13, as for the embodiment of FIG <figref idref="f0008 f0009 f0010 f0011">16 to 21</figref> shown, an arcuate with a non-constant distance from the pivot axis S_H of the retaining lever 12 extending stop surface 13'a against which the retaining counter-element 20 of the battery pack 2 can be placed, the stop surface 13'a extending from one of the release positions 12b of the retaining lever 12, as shown in FIG <figref idref="f0003">Fig. 5</figref> for the exemplary embodiment shown there, corresponding starting point P_A up to an end point P corresponding to the holding position 12a of the holding lever 12_E extends and a distance A 'of a contact point K_A the contact surface 13'a with the holding counter-element 20 with increasing pivoting of the holding lever 12 in the direction of the holding position 12a from the starting point P._A until a turning point P is reached_W the contact surface 13'a decreases. The contact surface 13'a is at the inflection point P._W to provide a reversal of a torque which can be exerted by the retaining counter-element 20 on the retaining lever 12 from a torque D acting in the direction of the release position 12b_L into a torque D acting in the direction of the holding position 12a_Z. set up.

0049The distance A 'of the contact point K_A the contact surface 13'a corresponds to the distance A of the contact surface 13a from the pivot axis S._H in the embodiment of <figref idref="f0002 f0003 f0004">4 to 7</figref>, the distance A 'with increasing pivoting of the holding lever 12 in the direction of the holding position 12a only in an area on the entry side until the turning point P is reached_W decreases. Immediately after the turning point P_W In any case, the distance A 'initially increases slightly before it then decreases again until the holding position 12a is reached by the holding lever 12.

0050The <figref idref="f0008">Fig. 16</figref> and <figref idref="f0009">17</figref> illustrate the torque reversal mentioned. In<figref idref="f0008">Fig. 16</figref> the holding lever 12 is in a position at which the contact point K_A the contact surface 13'a, which with increasing pivoting of the holding lever 12 in the direction of the holding position 12a from the starting point P_A to the end point P_E hikes, directly at or just before the turning point P_W lies. In this position of the holding lever 12, the holding counter-element 20 exerts a force F on the battery pack 2 in the direction of the docking position AL, ie in the pivoting direction, be it by a user or by the weight of the battery pack 2_D from whose in <figref idref="f0008">Fig. 16</figref> The dashed line of action shown on the starting point P_A the side of the pivot axis S facing the contact surface 13'a_H at a distance from the swivel axis S_H runs so that the force F_D in this case the torque D acting in the direction of the release position 12b_L causes. In<figref idref="f0009">Fig. 17</figref> is the contact point K_A the contact surface 13'a with the retaining counter-element 20 directly behind the turning point P._W, ie on the side of the turning point PW facing the end point PE of the contact surface 13'a. The force F in question runs in this position_D, which the battery pack 2, which is force-loaded in the swiveling direction, exerts with its retaining counter-element 20 on the retaining lever 12 and specifically on its retaining bracket 13, along a line of action, again indicated by dashed lines, which is now on the other, the starting point P_A the side of the pivot axis S facing away from the contact surface 13'a_H at a distance from the swivel axis S_H lies. As a result, the force F_D the torque D acting in the direction of the holding position 12a_Z. exerts on the holding lever 12. This torque reversal is determined by the suitably selected contour of the contact surface 13'a in the area of ​​the turning point P._W Provided, in the example shown, a change in the contour of the contact surface 13'a from an amount of the distance A 'of the contact point K which decreases with increasing pivoting of the holding lever 12 in the direction of the holding position 12a_A from the swivel axis S_H into an increasing amount of this distance A 'at the inflection point P_W includes.

0051This torque reversal at the inflection point P_W has the consequence that a force acting on the battery pack 2 in the pivoting direction, be it by a user or by the weight of the battery pack 2, only as long as the retaining counter-element 20 has the turning point P._W towards the end point P_E has not exceeded, leads to the fact that the holding lever 12 moves in the direction of the release position 12b and the battery pack 2 thereby moves into its pivoted-out docking position AL, as in FIG <figref idref="f0003">Fig. 5</figref> shown, moved. As soon as the retaining counter-element 20 has the inflection point P_W towards the end point P_E has exceeded, the battery pack 2 with its retaining counter-element 20 presses the retaining lever 12 in the direction of its retaining position 12b under the action of such a tensile force, so that the retaining lever 12 with its retaining bracket 13 the retaining counter-element 20 when the turning point P is exceeded_W towards the starting point P_A prevents the contact surface 13'a. In other words, the battery pack 2 is prevented under the effect of such a pulling force in the pivoting direction by this turning point contour of the contact surface 13'a, by means of the contact of its retaining counter element 20 at the turning point P_W Swing out the defined swivel position automatically until the docking position AL.

0052In corresponding embodiments, the holding lever 12, as for the embodiment of FIG <figref idref="f0008 f0009 f0010 f0011">16 to 21</figref> shown, an ejector contour 35, which is set up to release an ejector force F acting in the direction of the docking position AL when the holding lever 12 is pivoted in the direction of the release position 12b_A to exercise on the battery pack 2. By providing this ejector force F_A the holding lever 12 is able to support the pivoting out of the battery pack 2 from its carrying position 7 into its docking position AL by pivoting it in the direction of the release position 12b. The ejector force F_A can be used, for example, to overcome frictional forces between parts of the battery pack 2 and adjacent parts of the support base 3 and in any case to reduce a swiveling force on the battery pack 2 to be used by the user. The<figref idref="f0010 f0011">19 to 21</figref> illustrate the ejection or swiveling movement that can be effected from the in <figref idref="f0009">Fig. 18</figref> shown support position 7.

0053In advantageous embodiments, the ejector contour 35 includes an ejection pressure surface 35a, which acts on a counter abutment surface 37 of the battery pack 2, on a side of the retaining bracket 13 facing away from the run-on surface 13'a, as in the exemplary embodiment in FIG <figref idref="f0008 f0009 f0010 f0011">16 to 21</figref>, and / or an ejection pressure surface 35b acting on the retaining counter element 20 of the battery pack 2 on a side of an ejector cam 36 of the retaining lever 12 facing the stop surface 13'a, as also for the exemplary embodiment in FIG <figref idref="f0008 f0009 f0010 f0011">16 to 21</figref> shown. In alternative embodiments, the ejector contour 35 contains only the ejection pressure area 35a or only the ejection pressure area 35b.

0054In the embodiment of the <figref idref="f0008 f0009 f0010 f0011">16 to 21</figref> the ejector cam 36 is designed such that it presses with its ejection pressure surface 35b when the holding lever 12 is pivoted into the release position 12b during the entire lever pivoting movement against the holding counter element 20 of the battery pack and thus one over its entire movement path of the pivoting lever 12 from its holding position 12a into its release position 12b Swinging force F in the direction of the docking position AL_From on the battery pack 2 as part of the ejector force F_A exercises. For this purpose, the ejection pressure surface 35b is located on it in the manner of the contact point K_A the pressure contact point K migrating along the contact surface 13'a_D against the holding counter-element 12, a distance of this pressing contact point K. belonging to the ejection pressure surface 35b_D to the swivel axis S_H increases with increasing pivoting of the holding lever 12 in the direction of the release position 12b.

0055In the in the <figref idref="f0010 f0011">19 to 21</figref> Illustrated pivoting movement, the contact between the holding counter element 20 of the battery pack 2 and the holding bracket 13 of the holding lever 12 is canceled, ie when the battery pack 2 is pivoted out there is no force between the holding counter element 20 on the one hand and the holding bracket 13 on the other hand. In the exemplary embodiment shown, the contact surface 13'a of the retaining bracket 13 on the one hand and the ejection pressure surface 35b of the ejector cam 36 on the other hand delimit a movement slot area with a slot width that is sufficiently larger than the diameter of the retaining counter element 20 so that the retaining counter element 20 can move within this movement slot region in the desired manner, if the holding lever 12 in the direction of the holding position 12a or is pivoted in the direction of the release position 12b.

0056In the example shown, the ejection pressure surface 35a formed on the outside of the holding bracket 13 interacts with the counter-contact surface 36 of the battery pack 2 only in a partial area of ​​the entire pivoting movement of the holding lever 12 from its holding position 12a to its release position 12b. As in the<figref idref="f0010 f0011">19 to 21</figref> illustrated, in a first phase of the swiveling-out movement of the holding lever 12 from its holding position 12a, only the ejecting pressure surface 35b of the ejector cam 36 exercises its swiveling force F_From onto the retaining counter-element 20 and thus onto the battery pack 2, while the ejection pressure surface 35a of the retaining bracket 13 is still spaced from the counter-contact surface 37 of the battery pack 2. In a medium, in<figref idref="f0010">Fig. 20</figref> illustrated phase of the pivoting movement of the holding lever 12 in the direction of its release position 12b, then the ejection pressure surface 35a of the holding bracket 13 comes to bear against the counter abutment surface 37 of the battery pack 2 and exerts a pivoting force F_Aa as a further component of the total ejector force F_A of the holding lever 12 on the battery pack 2. In a last, in<figref idref="f0011">Fig. 21</figref> illustrated phase of the pivoting movement of the holding lever 12 into its release position 12b, the ejection pressure surface 35a of the holding bracket 13 has moved away from the counter-contact surface 37 of the battery pack, so that in this pivoting movement phase as in the first pivoting movement phase <figref idref="f0010">Fig. 19</figref> only the ejection pressure surface 35b of the ejector cam 36 with its swiveling force F_From to the ejector force F_A contributes, ie the ejector force F_A forms.

0057Depending on the system design and application, the ejector force F_A Depending on the pivoting position of the holding lever 12, only the ejection pressure surface 35b of the ejector cam 36 or only the ejection pressure surface 35a of the retaining bracket 13 or both ejection pressure surfaces 35a, 35b can be provided together. For example, a common effect of the two ejection pressure surfaces 35a, 35b can be provided in the pivoting positions of the holding lever 12, in which there is an increased need for swivel force or one of the two ejection pressure surfaces 35a, 35b alone is not able to exert the ejector force F_A to provide in the desired strength. In alternative embodiments, only the ejection pressure area 35a or only the ejection pressure area 35b is present without the respective other ejection pressure area, and in further alternative designs the ejection pressure area 35a of the holding bracket 13 acts on the entire pivoting movement of the holding lever 12 from its holding position 12a into its release position 12b, and in still further alternative designs, the ejection pressure surface 35b of the ejector cam 36 acts only in a partial region of the pivoting movement of the holding lever 12 from its holding position 12a into its release position 12b on the holding counter element 20 of the battery pack 2.

0058<figref idref="f0011">Fig. 22</figref> illustrates a block diagram of a device set with a back-carrying device 1 and with the back-portable battery pack 2 that can be attached to it. Optionally, the device set additionally comprises a hand-held electrical device 27 that can be supplied with electrical energy by the battery pack 2, such as an electrically driven gardening and / or forestry tool. The battery pack 2 can be detachably attached to the back carrying device 1 in the manner described. The electrical device 27 can be electrically coupled to the battery pack 2 and / or the back support device 1 by means of a flexible electrical line or alternatively by a direct plug connection. Furthermore, depending on the system design, the electrical device 27 can be mechanically rigidly coupled to the battery pack 2 and / or the back support device 1.

0059As the embodiments shown and the other above-mentioned exemplary embodiments make clear, the invention provides a back-carrying device with advantageous functional features with regard to coupling a back-portable battery pack and, if necessary, additionally with regard to belt height adjustment and / or connection of the lap belt unit to the support base. The back carrying device is particularly suitable for carrying a battery pack, however, depending on the design, it is alternatively or additionally suitable for carrying other objects which are attached to the carrying base or are accommodated in, for example, a container or bag on the carrying base.