Abstract
The invention relates to a device for supporting at least one arm (4) of a user (2), wherein: the device has at least one arm-supporting element (6) comprising an arm shell (8) for placing on the arm (4), at least one passive actuator which is configured to apply a force to the at least one arm-supporting element (6), and at least one counter bearing for the force to be applied, which counter bearing has at least one force transmission element (10) and a counter bearing element (14); the arm-supporting element (6) is connected to the force transmission element (10) via an articulation so as to be pivotable about at least one pivot axis; the device additionally has at least one restraining element (18) which limits a movement of the arm shell (8) along the arm (4) towards the hand when the device is worn, but does not affect a movement of the arm shell (8) in the opposite direction; and the at least one restraining element (18) is designed to be flexible but inelastic, and/or has at least one portion which extends in an axillary manner.
Claims
1. A device for supporting at least one arm (4) of a user (2), wherein the device has at least one arm support element (6) with an arm shell (8) for placing on the arm (4), at least one passive actuator, which is configured to apply a force to the at least one arm support element (6), and at least one counter bearing for the force to be applied, which comprises at least one force transmission element (10) and a counter bearing element (14), wherein the arm support element (6) is connected to the force transmission element (10) via a joint such that it can be swivelled about at least one swivel axis, characterized in that the device also comprises at least one restraining element (18) that restricts a displacement of the arm shell (8) along the arm (4) towards the hand when the device is mounted, but does not influence a displacement of the arm shell (8) in the opposite direction, wherein the at least one restraining element (18) is designed to be flexible yet inelastic and/or comprises at least one section that extends in an axillary manner.
2. The device according to claim 1, characterized in that the at least one axillary section of the at least one restraining element (18) forms a loop with at least one further section of the restraining element (18), wherein said loop encloses a torso of the user when the device is mounted.
3. The device according to claim 2, characterized in that a second axillary section constitutes part of the loop.
4. The device according to claim 3, characterized in that the device has a second arm support element (6) with a second arm shell (8) for placing on a second arm of the user and the at least one restraining element (18) restricts a displacement of the second arm shell (8) along the second arm towards the second hand when the device is mounted, but does not influence a displacement of the second arm shell (8) in the opposite direction.
5. The device according to one of the preceding claims, characterized in that the restraining element (18) extends from the arm shell (8) or the arm support element (6) to the counter bearing element (14).
6. The device according to claim 5, characterized in that the at least one axillary section of the at least one restraining element (18) extends from top to bottom, preferably within a sagittal plane, when the device is in the mounted state.
7. The device according to one of the preceding claims, characterized in that the restraining element (18) is an item of clothing or part of an item of clothing, the item of clothing preferably being a t-shirt (26), a shirt, a vest or a jacket.
8. The device according to one of the preceding claims, characterized in that the arm shell (8) and/or the counter bearing element (14) is detachably arranged on the restraining element (18).
9. The device according to claim 7 or 8, characterized in that the item of clothing features a reinforcement.
10. The device according to claim 9, characterized in that the reinforcement is a coating, an additional layer of fabric, particularly a woven fabric, or a reinforcement element, particularly made of a plastic.
11. The device according to claim 9 or 10, characterized in that the reinforcement extends across at least one section of a path, preferably across the entire path, from the arm shell (8) to the counter bearing element (14).
12. The device according to one of the preceding claims, characterized in that the restraining element (18) has at least one strap that is arranged on the arm shell (8) and an attachment element, particularly a harness, which is arranged on the user's upper body when the device is mounted.
Description
[0031] Various examples of embodiments of the present invention will be explained in more detail by way of the attached figures: They show:
[0032] FIGS. 1 to 3—schematic representations of a device according to an example of an embodiment of the present invention in the worn state, and
[0033] FIGS. 4 to 6—the representations from FIGS. 1 to 3 with a device according to a further example of an embodiment of the present invention.
[0034] FIG. 1 shows a rear view of a user 2 of the device with two raised arms 4. The device has two arm support elements 6, each of which bears an arm shell 8 that is mounted on an upper arm of the user 2. The arm support elements 6 are each connected to a force transmission element 10 that extends in a sleeve 12, where the passive actuator that is not shown in the figures is also located; it is not depicted for the sake of clarity. The lower end of the force transmission elements 10 is arranged on a counter bearing element 14, which is designed in the form of a pelvic harness or hip strap. The device is fixed to the user via two shoulder straps 16 that are connected to the counter bearing element 14.
[0035] The device shown in FIG. 1 also has two restraining elements 18, which are connected to the lower strap sections 20 of the shoulder straps 16 and arranged on the arm shell 8 at the opposite end. Each arm shell 8 comprises a separate restraining element 18. Instead of being arranged on the arm shell 8, the respective end of the restraining element 18 can also be arranged on the arm support element 6.
[0036] If the arms 4 of the user 2 are raised further from the position shown in FIG. 1, the angle between the respective arm support element 6 and the associated force transmission element 10 increases. Since the passive actuator, not depicted here, applies a supporting force to the arm support element 6, the actuator may cause the joint between the arm support element 6 and the force transmission element 10 to stretch without the user 2 wanting it to do so. The restraining element 18 is provided to prevent this, wherein it prevents the arm shell 8 from being displaced along the respective arm 4 towards the hand. Without this displacement, an accidental or unintentional stretching of the joint is not possible.
[0037] FIG. 2 depicts a frontal view of the user 2 from FIG. 1. The raised arms 4, arm shells 8, shoulder straps 16, which are also connected to the counter bearing element 14 in the frontal area by way of lower strap sections 20, and the two restraining elements 18 can be seen. The first section of the respective restraining element 18, as seen from the arm shell 8, extends in an axillary manner. In this area, the restraining element 18 is preferably a single strap made of a flexible yet inelastic material. Further on, a bifurcation 22 occurs where, in the example of an embodiment shown, the restraining elements 18 are split into a frontal section, shown in FIG. 2, and a dorsal section, shown in FIG. 1.
[0038] FIG. 3 shows a side view of the user 2. The arm 4 of the user 2 is raised and the arm shell 8 that is arranged on the arm support element 6 can be seen. Both the force transmission element 10 and the passive actuator not shown in FIG. 3 extend in the sleeve 12. In the representation in FIG. 3, the restraining element 18 can be seen particularly clearly, which in the upper section in FIG. 3, which adjoins the arm shell 8, is designed as a single strap that is split into two straps at the bifurcation 22. In the example of an embodiment shown, both the frontal section and the dorsal section are arranged on the lower strap sections 20 and thus connected to the counter bearing element 14. In FIG. 3, it is also clear that the lower end of the force transmission element 10 is arranged on the counter bearing element 14 via a ball element 24. This can be achieved, for example, in that the end of the force transmission element 10 is inserted into a specially provided pocket on the counter bearing element 14, instead of providing an actual ball joint.
[0039] FIG. 4 shows the user 2 in the position shown in FIG. 3 with a device according to a further example of an embodiment of the present invention. Unlike in FIGS. 1 to 3, the restraining element 18 is not designed in the form of a separate strap, but is formed by the t-shirt 26. The arm shell 8 arranged on the arm support element 6 is connected to the sleeve 28 of the t-shirt. The passive actuator, also not depicted in FIG. 4, which extends along the sleeve 12, exerts a supporting force on the arm support element 6 and without a restraining element 18 could cause the arm shell 8 to be displaced along the arm 4 towards the hand, i.e. upwards in FIG. 4, in order to stretch a joint between the arm support element 6 and the force transmission element 10. Since the arm shell 8 is arranged on the t-shirt 26 that forms the restraining element 18 and the lower end of the t-shirt 26 is connected to the counter bearing element 14, the arm shell 8 cannot be displaced or only to a very small extent upwards along the arm without the arm 4 being raised further. This prevents the displacement of the arm shell 8 along the arm 4 towards the hand. The contact between the lower end of the t-shirt 26 and the counter bearing element 14 may be achieved, for example, via velcro elements. However, it may be sufficient to design the counter bearing element 14 in the form of a belt or strap and thus apply a pressure by which the lower end of the t-shirt 26 is clamped between the counter bearing element 14 and the wearer's body. Of course, it is also possible to tuck the t-shirt 26 into trousers, for example, and achieve the required clamping effect via the trousers and/or a belt of the trousers.
[0040] FIGS. 5 and 6 show the user 2 in the positions from FIGS. 1 and 2 with a device according to FIG. 4. The arm shells 8 are connected to the t-shirt 26, so that this t-shirt 26 acts as a restraining element 18. In this case, therefore, there is also at least one section of the t-shirt 26 that extends in an axillary manner. It is especially preferable if the t-shirt 26, particularly in said section, is made of a material that is designed to be flexible yet as inelastic as possible.
[0041] In FIGS. 5 and 6 the device also features two shoulder straps 16 which, both in the frontal section in FIG. 6 and the rear section in FIG. 5, are connected to the counter bearing element 14 via lower strap sections 20. The arm shells 8 are located on the arm support element 6, which is connected to the respective force transmission element 10 via a joint. Said element extends along the sleeve 12 in which the passive actuator is also located, the latter not being depicted for the sake of better clarity. The lower ends of the force transmission elements 10 are connected to the counter bearing element 14 via ball joints 24.
REFERENCE LIST
[0042] 2 user [0043] 4 arm [0044] 6 arm support element [0045] 8 arm shell [0046] 10 force transmission element [0047] 12 sleeve [0048] 14 counter bearing element [0049] 16 shoulder strap [0050] 18 restraining element [0051] 20 lower strap section [0052] 22 bifurcation [0053] 24 ball joint [0054] 26 t-shirt [0055] 28 sleeve
