Limb prosthesis shaft

Abstract

The invention relates to a limb prosthesis shaft comprising an inner part (1), which forms a receptacle for receiving a limb stump and defines a longitudinal central axis (L) of the limb prosthesis shaft. It also comprises an outer part (2) for receiving a first end of the inner part (1), wherein the outer part (2) has, on an end facing away from the inner part (1), a base (26) and at least one elongate support (20), which is arranged at a first end on the base (26) and which extends from the base (26) over at least part of the inner part (1). The receptacle is formed by a mesh of flexible bands (10) acting as a Chinese finger trap. The inner part (1) has a connecting part (41) and the limb prosthesis shaft has a connecting rod (40) for fixedly connecting the connecting part (41) to a connecting unit (3) of a prosthesis (33, 34). This limb prosthesis shaft can be cost-effectively produced and allows easy adaptability to limb stumps.

Description

[0001] TITLE

[0002] LIMBORSE SHAFT

[0003] TECHNICAL AREA

[0004] The present invention relates to a limb prosthesis socket, in particular for a forearm prosthesis or for a lower leg prosthesis, and to a limb prosthesis system.

[0005] STATE OF THE ART

[0006] Limb prostheses are artificial limbs that replace a missing body part. This body part may have been amputated due to illness or accident, or it may have been absent from birth. Limb prostheses improve quality of life and enable people to lead an active life, which can include high-level sports.

[0007] A prosthetic limb socket connects the limb stump or amputation stump to the prosthesis. It must transmit movements as directly as possible, optimally absorb and evenly distribute forces, and also be comfortable.

[0008] Prosthetic sockets for limbs are often uncomfortable and therefore not worn willingly. Many sockets are also so rigid that they are unsuitable for sports activities. More comfortable sockets are expensive, especially those designed for specific sports. Another disadvantage of existing prosthetic sockets is that they hardly adapt to a child's growth and only to a limited extent to the daily changes in the residual limb. Furthermore, poorly fitted prosthetic sockets pose an increased risk of injury not only during sports activities but also in daily life. Only a minority of people missing an arm wear prostheses. Acceptance is greater among people missing a leg.WO 01 / 21113 A2 discloses a semi-rigid shell for receiving a stump of a lower leg and an insert, also called a liner, connected to the shell and surrounding the stump.

[0009] EP 2 866747 B1 shows an adjustable limb prosthesis socket with a distal end piece having an axis for connection to the prosthesis and with a frame to receive the limb stump. The frame has hinged fingers that surround the stump and are fixed to the stump by means of a lacing system.

[0010] US 2023 / 0255803 shows a limb prosthesis socket that is also adjustable by means of a lacing system. It has a complex design and is therefore correspondingly elaborate and expensive to manufacture.

[0011] US 2022 / 0370214 A1 shows a prosthetic limb socket with an outer shell and a conical inner socket. The socket is shaped to fit the residual limb by heating. The inner socket is more easily deformable than the outer shell. Additionally, a woven or knitted cover can be placed over the inner socket, acting similarly to a Chinese finger trap.

[0012] US 2013 / 0103166 A1 discloses a foot prosthesis in the form of a leaf spring connected to a shaft via a joint. The shaft is made of a fabric. In one embodiment, the shaft is shaped like a Chinese finger trap.

[0013] A Chinese finger trap is an extension sleeve made of a braided material. It is closed at one end and open at the other. When a finger or limb of a suitable or slightly larger diameter is inserted into the sleeve, its diameter increases as it is compressed. When attempting to withdraw the finger or limb, the sleeve lengthens and its diameter decreases. Once the diameter is reduced below the original size, the finger or limb is immobilized. To release the finger trap, the two ends are squeezed together, causing the diameter to increase again. Such finger traps are used in medicine to immobilize outstretched fingers. This is illustrated, for example, in US 2688961.

[0014] US 1 268932 proposes an extension bandage for an injured leg or arm, designed according to a Chinese finger trap. DESCRIPTION OF THE INVENTION

[0015] It is therefore an object of the invention to create a limb prosthesis socket and a limb prosthesis system that can be manufactured cost-effectively and that can be adapted as flexibly and individually as possible to a user's limb stump.

[0016] This problem is solved by a limb prosthesis socket with the features of claim 1 and a limb prosthesis system with the features of claim 19.

[0017] The prosthetic limb socket according to the invention comprises an inner part that forms a receptacle for receiving a limb stump and defines a longitudinal center axis of the prosthetic limb socket. The socket further comprises an outer part for receiving a first end of the inner part. The outer part has a base at an end facing away from the inner part and at least one elongated support, the first end of which is arranged on the base and which extends from the base over at least a portion of the inner part. The receptacle is formed by a mesh of flexible bands acting like a Chinese finger trap. The inner part comprises a connecting part. The prosthetic limb socket has a connecting rod for firmly connecting the connecting part to a prosthesis connection unit. The connection unit is also called a socket attachment or adapter.

[0018] The receptacle for the limb stump, designed as a Chinese finger trap, forms a flexible and easily adjustable sleeve that surrounds the stump without causing pressure points. Thanks to the Chinese finger trap principle, this sleeve adheres more securely to the stump the greater the external tensile forces acting upon it. The outer part, particularly the at least one elongated support, provides sufficient external support for the inherently soft or at least flexible receptacle and thus the limb stump itself, enabling it to withstand radially acting external forces. A connecting rod, linking the inner part to a connecting unit, ensures direct force transmission from the inner part, and therefore from the stump, to the prosthesis.

[0019] The definition of the longitudinal center axis is recognizable by the orientation of the mesh and the direction of action of the finger trap, particularly in combination with the outer part or the base. It is also recognizable in the use of the prosthetic limb socket, i.e., with the user's limb stump inserted.

[0020] Thanks to the combination of a Chinese finger-trap-shaped inner part with the supporting outer part and the connecting rod, both optimal force transmission and comfortable and pressure-free fixation of the limb stump are guaranteed.

[0021] This prosthetic socket can be manufactured cost-effectively. A key advantage is that it contains no parts that require specific adaptation to the shape of the individual limb stump during production. This is because there is no rigid or semi-rigid shell that, as is typical in the prior art, must fit the stump as pressure-free, evenly, and completely as possible. Since only the length and circumference of the stump are needed to manufacture the prosthetic socket, lengthy, painful, and expensive fitting sessions with a specialist are unnecessary. The prosthetic socket can be ordered online, for example, after entering relevant data about the stump, such as length and at least one circumference. This significantly reduces costs and makes it accessible to all users.

[0022] If the connecting rod runs parallel to the longitudinal center axis of the limb prosthesis shaft, the force transmission is further optimized.

[0023] In some embodiments, the connecting rod is rigidly attached to the base. Preferably, however, the connecting rod penetrates the base in such a way that it is displaceable relative to the base along its longitudinal central axis. This allows for an abrupt force to be applied from the inner part to the prosthesis, or vice versa, without the outer part transmitting the force to the circumference of the limb stump. This ensures the proper functioning of the finger catch. Furthermore, it helps prevent injuries.

[0024] The base can be designed in various ways. Preferably, it is a cylindrical disc with a central opening for receiving the connecting rod. The relative mobility of the connecting rod to the base can be achieved in different ways. In preferred embodiments, the base has an opening through which the connecting rod passes.

[0025] The connecting rod is preferably a rod that absorbs and transmits force when the limb prosthesis socket is loaded in the direction of the longitudinal center axis. It is also referred to as a pressure rod.

[0026] Preferably, the rod has a round cross-section. Preferably, the cross-section is constant over the entire length of the rod, possibly with the exception of the ends. The rod is preferably made of a metal, preferably steel. In preferred embodiments, the rod has a thread at both ends. In even more preferred embodiments, the rod is designed as a threaded rod along its entire length. This allows the use of lengths of rod and cutting to length for any size of prosthetic limb stumps, which reduces manufacturing costs and increases manufacturing flexibility.

[0027] Preferably, the connecting rod extends along the longitudinal center axis of the limb prosthesis shaft, i.e., its longitudinal axis corresponds to the longitudinal center axis of the shaft.

[0028] The inner part and the connecting rod serve to transmit force. The at least one elongated support acts as a support for the limb stump, which is held within the flexible, preferably soft, inner part. The support is preferably made of plastic. However, it can also be made of metal or another material. Preferably, it is rigid at least in its longitudinal direction.

[0029] In preferred embodiments, the at least one elongated support is flexible transversely to its longitudinal direction. This allows for optimal and pressure-free adaptation to the limb stump.

[0030] The outer part is preferably detachably fixed to the inner part. This facilitates the application and removal of the prosthetic socket. Furthermore, it allows the socket to be adjusted to the current condition of the residual limb. This means the socket can be rotated relative to the residual limb so that the support does not press on a currently sensitive area. Additionally, the socket can be fastened to the residual limb as tightly as is currently comfortable and beneficial. For example, the position of the outer part against the inner part, and thus against the residual limb, can be adjusted depending on whether the residual limb is swollen or not.

[0031] In some embodiments, the outer part is completely removable from the inner part. In other embodiments, only the supports are detachable from the inner part. If the entire inner part is detachable, it can be cleaned separately from the other components. This is particularly advantageous if the mesh is made of a textile material, as it can then be easily cleaned in a washing machine.

[0032] The outer part can be fixed to the inner part in various ways. In preferred embodiments, at least one flexible fixing strap is provided for the releasable fixing of the at least one support to the inner part, wherein the at least one fixing strap surrounds an outer circumference of the inner part. The fixing strap has, for example, a hook-and-loop fastener, a buckle, or a loop. Other types of releasable fasteners can also be used. The fixing strap is preferably flexible, more preferably soft, but not stretchable in length. In other embodiments, it is a stretchable strap.

[0033] In some embodiments, the fixing band is attached to the inside of the support. In other embodiments, it is attached to the inner part. In further embodiments, it can be placed over the outer circumference of the at least one support, preferably with means that prevent it from sliding in the direction of the longitudinal center axis relative to the support. This means is, for example, a groove on the outside of the support in which the fixing band is inserted.

[0034] In preferred embodiments, the at least one support has at least one slot for receiving the at least one fixing band, the slot extending longitudinally along the support. This prevents the band from slipping or being lost when the shaft is removed from the stump.

[0035] Preferably, more than one support is provided. Preferably, two and even more preferably three supports are provided. Preferably, the supports are identical in design and of the same length. In other embodiments, the supports are of different lengths and / or widths.

[0036] If exactly two supports are present, they are preferably arranged diametrically opposite each other. With three or more supports, they are preferably evenly distributed in a circle around the longitudinal central axis of the shaft. Asymmetrical arrangements that take the anatomy of the stump into account are also possible.

[0037] Preferably, the multiple supports are fixed together to the inner part by at least one common fixing band. This facilitates the application and removal of the socket. Furthermore, it ensures an even distribution of pressure from the supports on the stump.

[0038] In some embodiments, the braid is not directly connected to the at least one support and preferably not directly to other parts of the outer section either. However, in preferred embodiments, the at least one support has a fastening unit at a free second end for securing the braid. This facilitates putting on and taking off the shaft.

[0039] In some embodiments, the braid is attached directly to the rod. In preferred embodiments, the inner part has a connecting element for connection to the connecting rod. In some embodiments, the connecting element is permanently attached to the connecting rod. In preferred embodiments, it is detachably attached to the connecting rod. The detachable connection allows for the replacement of the shaft components and separate cleaning, particularly of the braid.

[0040] In a preferred embodiment, the connecting part has a preferably central threaded hole for the detachably fixed reception of the connecting rod. Preferably, the connecting part is a circular cylindrical disc.

[0041] In some embodiments, the connecting element is arranged outside the mesh. In preferred embodiments, the mesh is closed towards the prosthesis, forming a pouch, and the connecting element is arranged within this pouch. Preferably, the connecting rod penetrates the bottom of this pouch to be connected to the connecting element.

[0042] The limb prosthesis system according to the invention comprises the limb prosthesis socket described above and a connecting unit for connection to the connecting rod of the limb prosthesis socket. The connecting unit has a receptacle for receiving the base, wherein the base is displaceable relative to the connecting unit in the direction of the longitudinal center axis.

[0043] Further embodiments are specified in the dependent claims.

[0044] BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Preferred embodiments of the invention are described below with reference to the drawings, which serve only for illustration and are not to be interpreted restrictively. The drawings show:

[0046] Figure 1 shows a perspective view of a limb prosthesis shaft according to the invention;

[0047] Figure 2 shows an exploded view of the limb prosthesis socket according to Figure 1 with a hand prosthesis;

[0048] Figure 3 shows a second perspective view of the limb prosthesis socket according to Figure 2 with the hand prosthesis mounted according to Figure 2;

[0049] Figure 4 shows a perspective view of the limb prosthesis socket with hand prosthesis according to Figure 3, looking towards a receiving opening of the socket;

[0050] Figure 5 shows a first side view of the limb prosthesis shaft according to Figure 3;

[0051] Figure 6 shows a second side view of the limb prosthesis shaft according to Figure 3;

[0052] Figure? A side view of the limb prosthesis socket according to Figure 1 with a foot prosthesis;

[0053] Figure 8 shows a perspective view of a limb prosthesis shaft according to the invention in a second embodiment;

[0054] Figure 9 shows a perspective view of a limb prosthesis shaft according to the invention without showing the inner part in a third embodiment and

[0055] Figure 10 shows an exploded view of the limb prosthesis shaft according to Figure 9.

[0056] DESCRIPTION OF PREFERRED EXECUTION FORMS

[0057] Figures 1 to 6 show a first embodiment of a limb prosthesis socket according to the invention, here in use with a hand prosthesis 3.

[0058] The limb prosthesis socket comprises an inner part 1, an outer part 2, and a connecting rod 40. The connecting rod 40 connects the limb prosthesis socket to a connecting unit 3 of a prosthesis, in this case a hand prosthesis 33. This is clearly visible in Figures 3, 5, and 6.

[0059] The inner part 1 forms a receptacle for receiving a user's limb stump, in this case, an arm stump. The outer part 2 surrounds at least a lower, distal region of the inner part 1. Preferably, the outer part 2 extends to approximately half the length of the inner part 1. The connecting rod 40 is rigidly connected to the inner part 1 and extends from a lower, distal end of the inner part 1 through the outer part 2 to the connecting part 3, as can also be seen in Figures 3, 5, and 6. The connecting part 3 is rigidly connected to the connecting rod 40 and is displaceable in its longitudinal direction relative to the outer part 2. The connecting part 3 forms a receptacle with fingers 31 in which the base 26 of the outer part 2 is held so as to be displaceable in the longitudinal direction.

[0060] The inner part 1 is essentially formed by a braid of bands 10, which are woven in such a way as to form a Chinese finger trap. The braid consists of several strands or bands that are passed over and under each other to create a diamond-shaped structure. In English, this is called a "diamond braid" or a "biaxial braid".

[0061] The mesh forms a receptacle for receiving a user's limb stump (not shown). In this example, the stump is part of a forearm or upper arm. Preferably, the mesh is designed to form a conical receptacle for the stump. The taper preferably corresponds approximately to the taper of the user's corresponding arm stump.

[0062] As can be seen in Figure 1, a connecting part 41 is provided for connection with the connecting rod 40.

[0063] The lower end of the mesh of straps 10 is closed at the end of the inner part 1 that faces the hand prosthesis. A round piece of material, i.e., a circular piece of material, made of the same material as the straps 10 can be sewn onto the straps, or the straps 10 can be sewn together at a common end. In both cases, this creates a stocking, closed at one end, to receive the limb stump. The connecting part 41 is inserted into the stocking at this lower end. The closed end of the stocking has an opening for the passage of the connecting rod 40.

[0064] Alternatively, the stocking can also be designed openly, with the end of the braid or the ends of the bands attached to the connecting part 41, for example by gluing or fixing with a Velcro fastener.

[0065] The other end of the mesh, which forms an opening for the limb stump, is equipped with a closure device, in this case a closure strap 11. The closure strap 11 is preferably an open strap with a buckle. It can also be designed in other ways, provided it is individually adjustable to the circumference of the stump. For example, it can be designed with a hook-and-loop fastener or as a closed elastic ring.

[0066] When the fastening device, here the fastening strap 11, is tightened, the inner part 1 is fixed to the stump. By first pulling the mesh upwards along the stump, the straps 10 are stretched in the direction of a longitudinal central axis L of the socket, in particular of the inner part 1. They thereby fix the stump in the Chinese finger trap formed by the straps 10. When the fastening device, here the fastening strap 11, is released again, the mesh can be easily pushed downwards with the other hand. This increases the inner diameter of the inner part 1 again, the straps 10 loosen, and the stump is released. The prosthetic socket can then be removed from the stump. The straps 10 and preferably also the disc are flexible. They are preferably made of a textile material, more preferably a woven fabric.Depending on the embodiment, the bands 10 are either flexibly stretchable or not stretchable in their longitudinal and / or transverse direction. Bands that are not stretchable in their longitudinal direction are preferred.

[0067] The outer part 2 is made of a stiffer material than the inner part 1. Preferably, it is made of a plastic or a metal. It has at least one, here three, supports 20, the longitudinal direction of which runs parallel to or at an angle to the longitudinal center axis L.

[0068] Each support 20 has at least one slot 200 extending longitudinally along the support 20. At the end closest to the prosthesis, each support 20 has through-holes 201 for attachment to a base 26 of the outer part 2. At the opposite end, each support 20 has a projecting knob 24 for attaching the inner part 1. This is clearly visible in Figure 2.

[0069] The base 26 of the outer part is a circular cylindrical disc with a central through-opening 27 and lateral recesses with threaded holes. The ends of the struts 20 are received in these recesses and fixed to the base 26 by means of screws 44. This is clearly visible when looking together at Figures 1 and 2.

[0070] The connecting rod 40 penetrates the through-opening 27 of the base 26 and is screwed into a threaded bore 32 of a base body 30 of the connecting unit 3. At the opposite end, the connecting rod 40 is screwed into the connecting part 41, or it passes through a through-opening 42 and is rigidly connected to the connecting part 41 by a nut 43 and a locknut. The latter is shown in Figure 2. The connecting part 41, like the base 26, is designed as a circular cylindrical disc.

[0071] The base 26 is longitudinally displaceable relative to the base body 30 and the connecting rod 40. Fingers 31, which project from the base body 30 and surround the base 26, serve as guides for the base 26.

[0072] Due to this arrangement, the struts 20 of the outer part 2 are also longitudinally displaceable relative to the inner part 1. However, to hold them axially in their position and thereby support the inner part 1, and thus the user's limb stump, in the radial direction, at least one fixation strap, here a first and a second fixation strap 22, 23, is provided. They pass through the slots 200 of the supports 20 and surround the circumference of the inner part 1. In the figures, the fixation straps 22, 23 are shown schematically with buckles. They can alternatively be designed as closed elastic rings. However, they are preferably open straps with loops or clips and / or open straps with hook-and-loop fasteners. In Figure 4, a gap can be seen between the fixation strap 22 and the mesh of straps 10 of the inner part 1.In use, however, the fixing straps 22, 23 are tightened in such a way that they press the supports 20 against the outer circumference of the inner part 1, as can be seen in Figures 5 and 6.

[0073] The supports 20 are shaped such that they are at least slightly movable in the radial direction; preferably, they are resilient in this direction. In the longitudinal direction, they are rigid.

[0074] The mesh of bands 10 is preferably hooked onto the inwardly projecting buttons 24 of the outer part 2, as can be seen in Figure 4.

[0075] Flat bars 21, visible in Figure 2, are inserted into inner grooves of the supports 20 and screwed to the base 26 together with the supports 20. They serve to reinforce the supports. In other embodiments, no such flat bars 21 are present.

[0076] Figure 7 shows the limb prosthesis socket according to Figure 1 in use with a foot prosthesis 34. In this embodiment, the base 26 is not guided by the base body 30 of the connecting unit 3. However, in other embodiments, such a guide is provided, and this guide may also be absent in arm or hand prosthesis systems.

[0077] Figure 8 shows a variant of the system according to Figures 1 to 6. The difference is that instead of three supports 20, only two supports 20 are used, which are diametrically offset from each other and attached to the base 26.

[0078] Figure 9 shows another embodiment. The inner part 1, not shown, with band 10 and closure band 11, is the same as in the embodiments described above. The outer part 2 has only two supports 20 and optionally two flat bars 21, not shown here. However, three or more supports 20 and flat bars 21 can also be used. Likewise, the embodiments described above can be designed with only two supports 20 and optionally with two flat bars 21.

[0079] The supports 20 can preferably also be fixed relative to the inner part 1 by means of at least one fastening band 11. Preferably, the supports 20 have slots 200 for the passage of flat fastening bands 11. Instead of the slots 200, through-openings of other shapes can also be used.

[0080] The supports 20 can also be attached to the band 10 by means of buttons 24. Preferably, however, they have through-openings 202 to allow a screw connection with the inner part 1, preferably with the band 10.

[0081] The connecting unit 3, which can be connected to the outer part 2, has a base body 30 and a hand prosthesis 33. Instead of this unit 3, a foot prosthesis 34 can also be connected to the outer part 2.

[0082] The supports 20, or optionally the flat bars 21, are preferably screwed to the base 26 of the outer part 2 or can be connected to the base 26 in another way. Some of the corresponding through-openings are designated with reference numeral 201 in Figures 9 and 10. The supports 20, and optionally the flat bars 21, are received in corresponding outer grooves 260 of the base 26.

[0083] The connecting rod 40 is designed as a threaded rod. At the end of the connecting rod 40 closest to the limb stump is the connecting part 41. In the embodiments already described, the connecting part 41 can be inserted into the stocking or attached to it.

[0084] The opposite end of the connecting rod 40 terminates in a receiving bushing 46, which has internal threads for engagement with the external thread of the threaded rod 40. The receiving bushing 64 preferably has one end with a radially projecting flange 47 that transitions into a second threaded rod 48. Instead of two threaded rods 40, 48, a single, one-piece threaded rod can also be used. However, the use of two threaded rods 40, 48 allows for further adjustments in the longitudinal direction L. A rotation aid 45 in the form of a rotationally fixed bushing is preferably arranged on the first threaded rod 40.

[0085] The base 26 is provided with a through-opening in which the receiving bushing 46 is received. Preferably, the receiving bushing 46 is held so as to be displaceable in the longitudinal direction L relative to the base 26. In other embodiments, the through-opening is provided with an internal thread that interacts with the external thread of the threaded rod.

[0086] The second threaded rod 48 passes through a central through-opening 35 in the base body 30 of the connecting unit 3. Its free end can be secured in position relative to the base body 30 by a nut 49. The central through-opening 35 can have smooth inner walls or be provided with an internal thread.

[0087] In this example, the base 26 is designed in two parts. The two base parts 261 preferably form together the two opposing external grooves 260, as well as the through-opening 27. They have through-openings 262 into which screws 263 can be inserted and secured with nuts 264. Alternatively, they have internal threads for receiving the screws.

[0088] The supports 20 or the flat bars 21 lie against the end face of the base 26 near the limb stump and, on the other hand, against the end face of the base body 30 of the connecting unit 3 near the limb stump.

[0089] This embodiment enables a fixed connection between the connecting part 41, the base 26, the main body 30, and the prosthesis 33, 34. In contrast to the embodiments described above, this embodiment thus has no relative mobility of the connecting rod to the base. In one variant, the base 26 in this embodiment is cylindrical or, as shown here, frustoconical. Other shapes are also possible.

[0090] The prosthetic limb socket according to the invention can be manufactured cost-effectively and allows for easy adaptation to limb stumps. REFERENCE SIGN LIST

[0091] 1 inner part

[0092] Volume 10

[0093] 11. Closure strap

[0094] 2 Outdoor part

[0095] 20 support

[0096] 200 slots

[0097] 201 Passage opening

[0098] 202 Passage opening

[0099] 21 flat bar

[0100] 22 first fixation tape

[0101] 23 second fixation tape

[0102] 24 button

[0103] 26 sockets

[0104] 260 outer groove

[0105] 261 Base part

[0106] 262 Passage opening

[0107] 263 screw

[0108] 264 Mother

[0109] 27 Passage opening

[0110] 3 Connection unit

[0111] 30 basic shapes

[0112] 31 fingers

[0113] 32 threaded holes

[0114] 33 Hand prosthesis

[0115] 34 Foot prosthesis

[0116] 40 Connecting rod

[0117] 41 Connecting part

[0118] 42 Passage opening

[0119] 43 Mother

[0120] 44 screw

[0121] 45 Rotary aid 46 Mounting bushing 47 Flange

[0122] 48 second threaded rod 49 nut

[0123] L Longitudinal axis

Claims

PATENT CLAIM 1. Limb prosthesis socket with an inner part (1) which forms a receptacle for receiving a limb stump and which defines a longitudinal central axis (L) of the limb prosthesis shaft, and with an outer part (2) for receiving a first end of the inner part (1), wherein the outer part (2) has a base (26) at an end facing away from the inner part (1) and wherein the outer part (2) has at least one elongated support (20) which is arranged with a first end on the base (26) and which extends from the base (26) over at least a part of the inner part (1), characterized by that the recording is formed by a network of flexible bands (10) acting as a Chinese finger trap, that the inner part (1) has a connecting part (41), and that the limb prosthesis socket has a connecting rod (40) for firmly connecting the connecting part (41) to a connecting unit (3) of a prosthesis (33, 34).

2. Limb prosthesis socket according to claim 1, wherein the connecting rod (40) runs parallel to the longitudinal central axis (L) of the limb prosthesis socket.

3. Limb prosthesis socket according to one of claims 1 or 2, wherein the mesh forms a stocking and wherein a) the connecting part (41) is inserted at a closed end of the stocking or b) the connecting element (41) is attached to an open end of the stocking.

4. Limb prosthesis socket according to one of claims 1 to 3, wherein a closure band (11) is provided at an end of the mesh opposite the connecting part (41) in order to pull the mesh together and fix it to the stump.

5. Limb prosthesis socket according to one of claims 1 to 4, wherein the connecting rod (40) penetrates the base (26), wherein the connecting rod (40) is displaceable along the longitudinal central axis (L) relative to the base (26).

6. Limb prosthesis shaft according to claim 5, wherein the displaceability allows an abrupt force to be applied from the inner part to the prosthesis or vice versa, without the outer part transmitting the force impulse to the circumference of the limb stump.

7. Limb prosthesis socket according to one of claims 1 to 6, wherein the base (26) has a through-opening with an internal thread (27) into which the connecting rod (40) is screwed, wherein the connecting rod (40) penetrates the base (26) for a fixed connection with the connecting unit (3).

8. Limb prosthesis socket according to one of claims 5 to 7, wherein the base (26) is a circular cylindrical or frustoconical disc with a central through-opening (27) for receiving the connecting rod (40).

9. Limb prosthesis socket according to one of claims 1 to 8, wherein the connecting rod (40) is a force-receiving and force-transmitting rod in the direction of the longitudinal central axis (L) when the limb prosthesis socket is loaded.

10. Limb prosthesis shaft according to one of claims 1 to 9, wherein the connecting rod (40) extends along the longitudinal central axis (L) of the limb prosthesis shaft.

11. Limb prosthesis socket according to one of claims 1 to 10, wherein the at least one elongated support (20) is rigid at least in its longitudinal direction.

12. Limb prosthesis socket according to one of claims 1 to 11, wherein the at least one elongated support (20) is flexibly designed transversely to its longitudinal direction.

13. Limb prosthesis socket according to one of claims 1 to 12, wherein at least one flexible fixation band (22, 23) is provided for releasably fixing the at least one support (20) to the inner part (1), wherein the at least one fixation band (22, 23) surrounds an outer circumference of the inner part (1).19 14. Limb prosthesis socket according to claim 13, wherein the at least one support (20) has at least one slot (200) for receiving the at least one fixation band (22, 23), wherein the slot (200) extends in the longitudinal direction of the support (20).

15. Limb prosthesis socket according to one of claims 1 to 14, wherein at least two, preferably three, supports (20) are provided.

16. Limb prosthesis socket according to claim 15, if referred back to one of claims 12 or 13, wherein the at least one fixation band (22, 23) fixes the supports (20) jointly to the inner part.

17. Limb prosthesis socket according to one of claims 1 to 16, wherein the at least one support (20) has a fastening unit (24) at a free second end for fastening the mesh.

18. Limb prosthesis socket according to one of claims 1 to 17, wherein the connecting part (41) is a circular cylindrical disc with a central threaded hole (42) for releasably fixed reception of the connecting rod (40).

19. Limb prosthesis system comprising a limb prosthesis socket according to any one of claims 1 to 18 and comprising a connecting unit (3) for connection to the connecting rod (40) of the limb prosthesis socket, wherein the connecting unit (3) has a receptacle for receiving the base (26), wherein the base (26) is displaceable in the direction of the longitudinal central axis (L) relative to the connecting unit (3).

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