Prosthetic socket with composite structure and prosthetic auxiliary device

Abstract

This utility model discloses a prosthesis receiving cavity with a composite structure. The prosthesis receiving cavity defines a receiving cavity for accommodating the residual limb. The prosthesis receiving cavity includes a shell, a connecting piece, and an adjustment component: the shell has at least one slit extending from the top of the receiving cavity to the bottom of the receiving cavity; the connecting piece is disposed at at least one slit of the shell and connected to the shell, and the connecting piece is stretchable and deformable; the adjustment component is disposed on the shell or the connecting piece, and the adjustment component is used to adjust the size of at least one slit. This utility model also discloses a prosthesis assistive device with a prosthesis receiving cavity. This utility model, by adding a slit to the prosthesis receiving cavity, facilitates donning and doffing, and at the same time, the connecting piece at the slit provides the shell part with good integrity and support, making the structure lighter and more breathable.

Description

Technical Field

[0001] This utility model relates to the field of medical rehabilitation devices, and in particular to a prosthesis receiving cavity and prosthesis assistive device with a composite structure. Background Technology

[0002] The receiving cavity is the interface connecting the residual limb and the prosthesis. It is the most important component of the prosthesis and directly affects the wearing comfort and performance of the prosthesis. It is the key and difficult point in the entire prosthesis design and manufacturing process.

[0003] Therefore, designing a reasonable prosthetic interface that maximizes the wearing comfort of the prosthesis while ensuring functional transferability, and resolving the fundamental contradiction that the rigidity and flexibility of the prosthetic receiving cavity interface cannot be simultaneously satisfied in current clinical applications, has significant social implications and market prospects. Utility Model Content

[0004] This invention provides a prosthesis receiving cavity and prosthesis auxiliary device with a composite structure, which satisfies the rigidity and flexibility characteristics of the interface of the prosthesis receiving cavity, and is lightweight, breathable, easy to put on and take off, and relatively low in cost.

[0005] This invention provides a prosthesis receiving cavity with a composite structure. The prosthesis receiving cavity defines a receiving cavity for accommodating a residual limb. The prosthesis receiving cavity includes a shell, a connecting piece, and an adjustment assembly. The shell has at least one slit extending from the top of the receiving cavity to the bottom of the receiving cavity. The connecting piece is disposed at at least one slit in the shell and connected to the shell. The connecting piece is stretchable and deformable. The adjustment assembly is disposed on the shell or the connecting piece and is used to adjust the size of the at least one slit.

[0006] In some embodiments, the adjustment assembly includes at least one adjustment cord and a knob winder. The at least one adjustment cord is wound around the outside of the housing, passes over the at least one slit, and is connected to the knob winder. The knob winder is used to adjust the tension of the at least one adjustment cord to adjust the size of the at least one slit.

[0007] In some embodiments, the adjustment assembly includes at least one tightening rope and at least two fixing parts, the at least two fixing parts being disposed on opposite sides of the housing located at the at least one slit, the two ends of the tightening rope crossing upwards from the bottom end of the receiving cavity and passing through the fixing parts to be tied to the surface of the housing, the tightening rope being used to adjust the size of the at least one slit.

[0008] In some embodiments, the adjusting assembly includes two zipper tabs and a zipper pull slidably disposed between the two zipper tabs. The two zipper tabs are disposed on opposite sides of the housing located at the at least one slit. The zipper pull is pulled upward from the bottom end of the receiving cavity to tighten the sidewall of the receiving cavity and adjust the size of the at least one slit.

[0009] In some embodiments, the adjusting assembly includes two zipper tabs and a slider slidably disposed between the two zipper tabs. The two zipper tabs are disposed on a connecting piece. The slider is pulled upward from the bottom end of the receiving cavity to close the sidewall of the receiving cavity and tighten it to adjust the size of the at least one slit.

[0010] In some embodiments, the adjustment assembly includes a fixed adhesive portion and a movable adhesive portion, which are respectively disposed on opposite sides of the housing located in the at least one slit. The fixed adhesive portion and the movable adhesive portion can be bonded together to adjust the size of the at least one slit.

[0011] In some embodiments, a buffer layer is further included, the shape of which is adapted to the housing and fits against the inner peripheral surface of the housing, and at least one of the housing and the buffer layer is provided with vent holes.

[0012] In some embodiments, the connecting piece is made of a flexible material, the outer shell is made of a rigid material, and the hardness of the outer shell is greater than the hardness of the connecting piece.

[0013] This utility model also provides a prosthesis assistive device, including the prosthesis receiving cavity and support member described above, wherein the support member is connected to the bottom of the prosthesis receiving cavity.

[0014] In some embodiments, the support member is a retractable structure.

[0015] The beneficial effects of this utility model are as follows:

[0016] The prosthesis receiving cavity of this invention abandons the traditional fully enclosed receiving cavity structure. A slit is added to the side wall of the prosthesis receiving cavity, and the prosthesis receiving cavity is tightened by the adjustment component. On the one hand, the air permeability is improved, and on the other hand, the size of the prosthesis receiving cavity entrance can be freely controlled by stretching the outer shell, making it convenient to put on and take off.

[0017] In addition, the outer shell is connected to the slit with a connecting piece. This composite structure gives the outer shell a good integrity and support, meets the rigidity and flexibility requirements of the prosthesis receiving cavity interface, and makes the structure lighter and more breathable. Attached Figure Description

[0018] Figure 1This is a three-dimensional structural diagram of a prosthesis receiving cavity provided in Embodiment 1 of this application.

[0019] Figure 2 yes Figure 1 The diagram shows an exploded view of the prosthesis receiving cavity.

[0020] Figure 3 This is a side view of a prosthesis receiving cavity provided in Embodiment 2 of this application.

[0021] Figure 4 This is a side view of a prosthesis receiving cavity provided in Embodiment 3 of this application.

[0022] Figure 5 This is a side view of a prosthesis receiving cavity provided in Embodiment 4 of this application.

[0023] Figure 6 This is a three-dimensional structural diagram of a prosthesis receiving cavity provided in Embodiment 5 of this application.

[0024] Figure 7 This is a three-dimensional structural schematic diagram of a prosthetic assistive device provided in Embodiment Six of this application.

[0025] Reference numerals in the attached figures: Prosthetic receiving cavity 1; Prosthetic receiving cavities 100, 100a, 100b, 100c, 100d; Receiving cavity 101; Support member 200; Outer shell 10, 10a, 10b, 10c, 10d; Slits 11, 11a, 11b, 11c, 11d; First positioning part 12; Connecting pieces 20, 20a, 20b, 20c, 20d; Second positioning part 21; Adjustment components 30, 30a, 30b, 30c, 30d; Adjustment rope 31; Knob rope winder 32; Tightening rope 33; Fixing part 34; Zipper piece 35; Zipper head 36; Fixed adhesive part 37; Movable adhesive part 38; Buffer layer 40, 40a, 40b, 40c, 40d; Vent hole 41. Detailed Implementation

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Example 1

[0030] Please refer to Figure 1 and Figure 2 As shown, Embodiment 1 of this application provides a prosthesis receiving cavity 100 with a composite structure. The prosthesis receiving cavity 100 defines a receiving cavity 101 for accommodating the residual limb. The receiving cavity 101 has a barrel-shaped structure that is wider at the top and narrower at the bottom, and is adapted to the shape of the human residual limb, such as the thigh, calf, or arm.

[0031] The prosthetic receiving cavity 100 includes a housing 10, a connecting piece 20, and an adjustment assembly 30. The housing 10 has at least one slit 11 extending from the top end of the receiving cavity 101 to the bottom end, penetrating the top end but not the bottom end. The connecting piece 20 is disposed at at least one slit 11 of the housing 10 and connected to the housing 10; the connecting piece 20 is stretchable and deformable. The adjustment assembly 30 is disposed on the housing 10 or the connecting piece 20, and is used to adjust the size of the at least one slit 11, thereby adjusting the size of the receiving cavity 101.

[0032] The adjustment assembly 30 includes at least one adjustment rope 31 and a knob rope winder 32. The at least one adjustment rope 31 is wound around the outside of the housing 10. The adjustment rope 31 passes over at least one slit 11 and is connected to the knob rope winder 32. The knob rope winder 32 is used to adjust the tension of the at least one adjustment rope 31. The size of the receiving cavity 101 is adjusted by adjusting the size of the at least one slit 11.

[0033] The adjusting rope 31 is arranged around the outer side of the housing 10, with the top of the housing 101 facing the opposite bottom end, preferably inclined around the circumference of the housing 10. The knob rope winder 32 is preferably a BOA adjusting knob, and the material of the BOA adjusting knob is considered to be PA12. The knob rope winder 32 is fixedly connected to the side wall of the housing 10. The design of the adjusting rope 31 makes the force-bearing area larger and the force more even, avoiding a state where only the top is tightened while the middle part is still loose.

[0034] The adjusting rope 31 is a flat, ring-shaped strip wound around the side wall of the housing 10 and passes through the slit 11. One side of the bent adjusting rope 31 is fixed to the side wall of the housing 10 by a knob rope winder 32, and the other side of the bent adjusting rope 31 can be fixed to the side wall of the housing 10 by a rope winding shaft seat (not shown).

[0035] To better define the position of the adjustment rope 31, a first positioning part 12 is provided on the side wall of the outer casing 10 for accommodating the adjustment rope 31. The shape of the first positioning part 12 corresponds to that of the adjustment rope 31 and is a flat annular strip. The first positioning part 12 can be a positioning groove or a pipe that passes through the inside of the outer casing 10 for the adjustment rope 31 to pass through. The knob rope winder 32 is located near the first positioning part 12.

[0036] The adjusting rope 31 can be directly wound around the outer surface of the connecting piece 20, or a second positioning part 21 for accommodating the adjusting rope 31 can be provided on the outer surface of the connecting piece 20. Preferably, the second positioning part 21 has a rope channel penetrating through the inside of the connecting piece 20 to facilitate the positioning of the adjusting rope 31.

[0037] In this embodiment, the outer shell 10 preferably has two symmetrical slits 11, which makes it convenient for the user to quickly and easily insert the affected limb into the receiving cavity 101 of the prosthesis receiving cavity 100 when wearing it.

[0038] Two adjusting ropes 31 are wound around the outer side of the outer casing 10, each rope 31 passing over two slits 11. A first adjusting rope is wound around the outer side of the outer casing 10 near the top, and a second adjusting rope is wound around the outer side of the outer casing 10 near the bottom. Preferably, one knob rope winder 32 is located at the upper left end of the outer casing 10, and the other knob rope winder 32 is located at the lower right end. When the knob rope winder 32 is adjusted, the adjusting ropes 31 gradually tighten, the slits 11 on both sides of the outer casing 10 gradually narrow, and the receiving cavity 101 also contracts accordingly, with its diameter and volume changing accordingly. The pressure on the two adjusting ropes 31 is less than that on a single adjusting rope 31, and the dimensions and circumference of the upper and lower parts of the receiving cavity 101 can be adjusted separately, which better ensures the stability and fit of the outer casing 10.

[0039] In addition, the two adjusting ropes 31 can also be arranged symmetrically, with each adjusting rope 31 corresponding to a slit 11. Each slit 11 is controlled by the corresponding adjusting rope 31 and the knob rope winder 32 to adjust the size of the receiving cavity 101.

[0040] Of course, the side wall of the outer shell 10 can also be wound with only one adjusting rope, which is spiral and passes through both slits 11 at the same time.

[0041] The prosthesis receiving cavity 100 also includes a buffer layer 40. The shape of the buffer layer 40 is adapted to the outer shell 10 and fits against the inner peripheral surface of the outer shell 10; the inner peripheral surface of the buffer layer 40 is fitted with a skin-friendly fabric layer (not shown).

[0042] At least one of the outer shell 10 and the buffer layer 40 is provided with a plurality of evenly distributed vent holes.

[0043] The outer shell 10 and the buffer layer 40 are preferably printed using 3D printing technology. The outer shell 10 is preferably a rigid shell printed from PA12 (polyamide 12) material. PA12 has good toughness, toughness, chemical resistance, a smooth surface, and good dimensional stability. The outer shell 10 has locally distributed ventilation holes (not shown in the figure) with a diameter of 2 mm and a spacing of approximately 3 mm, for aesthetic and ventilation purposes.

[0044] The cushioning layer 40 is preferably made of polyurethane with a thickness of 2 mm. Polyurethane has excellent elasticity, abrasion resistance and heat insulation, and can provide good shock absorption, effectively cushioning the contact and pressure of the limbs and reducing the impact force during walking. In addition, the evenly distributed ventilation holes 41 on the cushioning layer 40 can also ensure breathability.

[0045] For comfort, the cushioning layer 40 will be covered with a skin-friendly fabric layer. This skin-friendly fabric layer is preferably a knitted fabric, which not only improves the wearing experience but also secures the connection between the outer shell 10 and the cushioning layer 40.

[0046] The connecting piece 20 is made of a flexible material, with a lower hardness than the rigid outer shell 10. The flexible material can be made of a breathable and elastic fabric, preferably Lycra. Lycra fabric is breathable, elastic, and less irritating to the skin. At the same time, this fabric reinforces the outer shell 10, effectively connecting the rigid outer shell 10 and ensuring its integrity and support. Without the connecting piece 20, the outer shell 10 would easily collapse after prolonged wear. When wearing the garment, the user can freely control the size of the opening for the affected limb by stretching the outer shell 10, facilitating easy donning and doffing.

[0047] The prosthesis receiving cavity 100 adopts a composite layer structure with a hard outer layer and a soft inner layer. At the same time, a slit 11 is opened on the side wall of the outer shell 10 for easy wearing. A connecting piece 20 is set at the slit 11 to ensure both skin-friendliness and breathability.

[0048] Example 2

[0049] Please refer to Figure 3 As shown, Embodiment 2 of this application provides a prosthesis receiving cavity with a composite structure. The difference between this embodiment and Embodiment 1 lies in the structure of the adjustment component.

[0050] In this embodiment, the prosthesis receiving cavity 100a includes a housing 10a, a connecting piece 20a, and an adjustment assembly 30a. The housing 10a has two slits 11a extending from the top of the receiving cavity to the bottom, penetrating the top but not the bottom. The connecting piece 20a is disposed at the slits 11a of the housing 10a and connected to the housing 10a; the connecting piece 20a is stretchable and deformable. The adjustment assembly 30a is disposed on the connecting piece 20a and is used to close the receiving cavity and adjust the size of the slits 11a, thereby adjusting the size of the receiving cavity.

[0051] The adjusting assembly 30a includes two zipper tabs 35a and a zipper pull 36a slidably disposed between the two zipper tabs 35a. The connecting piece 20a has a slit in the middle (not shown in the figure), and the two zipper tabs 35a are disposed on both sides of the slit in the connecting piece 20a. The zipper pull 36a is pulled upward from the bottom end of the receiving cavity to close the side wall of the receiving cavity and tighten the size of the adjusting slit 11a.

[0052] Please refer to Figure 4 As shown, Embodiment 3 of this application provides a prosthesis receiving cavity with a composite structure. The difference between this embodiment and Embodiment 2 is that the adjustment component is located in the outer shell.

[0053] In this embodiment, the prosthesis receiving cavity 100b includes a housing 10b, a connecting piece 20b, and an adjustment assembly 30b. The housing 10b has two slits 11b extending from the top of the receiving cavity to the bottom, penetrating the top but not the bottom. The connecting piece 20b is disposed at the slits 11b of the housing 10b and connected to the housing 10b; the connecting piece 20b is stretchable and deformable. The adjustment assembly 30b is disposed in the housing 10b and is used to adjust the size of the slits 11b, thereby adjusting the size of the receiving cavity.

[0054] The adjusting component 30b includes two zipper pieces 35b and a zipper head 36b slidably disposed between the two zipper pieces 35b. The two zipper pieces 35b are disposed on opposite sides of the housing 10b located in the slit 11b. The zipper head 36b is pulled upward from the bottom end of the receiving cavity to tighten the side wall of the receiving cavity and adjust the size of the slit 11b.

[0055] Example 4

[0056] Please refer to Figure 5 As shown, Embodiment 4 of this application provides a prosthesis receiving cavity with a composite structure. The difference between this embodiment and Embodiment 1 lies in the structure of the adjustment component.

[0057] In this embodiment, the prosthesis receiving cavity 100c includes a housing 10c, a connecting piece 20c, and an adjustment assembly 30c. The housing 10c has two slits 11c extending from the top of the receiving cavity to the bottom, penetrating the top but not the bottom. The connecting piece 20c is disposed at the slits 11c of the housing 10c and connected to the housing 10c; the connecting piece 20c is stretchable and deformable. The adjustment assembly 30c is disposed in the housing 10c and is used to adjust the size of the slits 11c, thereby adjusting the size of the receiving cavity.

[0058] The adjustment assembly 30c includes at least one tightening rope 33 and at least two fixing parts 34. The at least two fixing parts 34 are located on opposite sides of the housing 10c at the slit 11c. In this embodiment, the fixing parts 34 on one side of the slit 11c are arranged from the top of the receiving cavity to the bottom of the receiving cavity, and the fixing parts 34 on both sides of the slit 11c are symmetrically arranged. The two ends of the tightening rope 33 cross and pass through the fixing parts 34 from the bottom of the receiving cavity upwards, thus securing it to the surface of the housing 10c. The tightening rope 33 is used to adjust the size of the slit 11c.

[0059] Example 5

[0060] Please refer to Figure 6 As shown, Embodiment 5 of this application provides a prosthesis receiving cavity with a composite structure. The difference between this embodiment and Embodiment 1 lies in the structure of the adjustment component.

[0061] In this embodiment, the prosthetic receiving cavity 100d includes a housing 10d, a connecting piece 20d, and an adjustment assembly 30d. The housing 10d has two slits 11d extending from the top of the cavity to the bottom, penetrating the top but not the bottom. The connecting piece 20d is positioned at one of the slits 11d and connected to the housing 10d; the connecting piece 20d is stretchable and deformable. The adjustment assembly 30d is located on the housing 10d and is used to adjust the size of the slits 11d, thereby adjusting the size of the receiving cavity.

[0062] The adjusting component 30d includes a fixed adhesive portion 37 and a movable adhesive portion 38, which are respectively disposed on opposite sides of the slit 11d in the housing 10d. The fixed adhesive portion 37 and the movable adhesive portion 38 can be adhesively connected to fit the size of the slit 11d. The fixed adhesive portion 37 and the movable adhesive portion 38 are preferably of a Velcro structure.

[0063] The adjusting component 30d can also be set in the connecting piece 20d. The connecting piece 20d has a slit in the middle, which divides the connecting piece 20d into left and right parts. The fixed adhesive part 37 is set in the left part of the connecting piece 20d, and the movable adhesive part 38 is set in the right part of the connecting piece 20d. The fixed adhesive part 37 and the movable adhesive part 38 are connected by adhesive to close the side wall of the receiving cavity. The size of the slit 11d is adjusted by different adhesive positions, thereby adjusting the size of the receiving cavity.

[0064] Example 6

[0065] Please refer to Figure 7 As shown, Embodiment Six of this application provides a prosthetic assistive device 1, including a prosthetic receiving cavity 100 and a support member 200. In this example, the prosthetic receiving cavity 100 adopts the structure of Embodiment One, but of course, other embodiments can also be used.

[0066] The prosthetic receiving cavity 100 includes a housing 10, a connecting piece 20, and an adjustment assembly 30. The housing 10 has at least one slit 11 extending from the top of the cavity to the bottom, penetrating the top but not the bottom. The connecting piece 20 is disposed at and connected to the housing 10 at at least one slit 11, and is stretchable and deformable. The adjustment assembly 30 is disposed on the housing 10 or the connecting piece 20, and is used to adjust the size of the at least one slit 11, thereby adjusting the size of the receiving cavity 101.

[0067] The support member 200 is connected to the bottom of the prosthesis receiving cavity 100. This support member 200 is only fixedly connected to the outer shell 10 and does not penetrate into the buffer layer 40. This allows for connection to the outer shell 10 while avoiding direct contact with the affected limb and preventing discomfort. The support member 200 is a rigid, extendable structure that allows for length adjustment for easy storage while providing good support.

[0068] In the embodiments provided in this application, the slits extend from the top of the cavity to the bottom of the cavity, and the slits pass through the top of the cavity but do not penetrate to the bottom of the cavity.

[0069] In other embodiments, the slit may extend from the top to the bottom of the receiving cavity, but it does not penetrate both the top and bottom of the receiving cavity. The slit is a strip-shaped opening located on the side wall of the outer shell. A connecting piece is attached to the slit, filling it to make the outer shell a closed structure. An adjustment component is located on the outer shell or the connecting piece, and is used to tighten and adjust the circumference of the slit in the outer shell. To facilitate the insertion of the residual limb into the receiving cavity of the prosthesis, the opening at the top of the outer shell is sufficiently wide. Therefore, a retaining assembly is added to the top of the outer shell to adjust the circumference of the top of the outer shell, thereby adjusting the size of the receiving cavity. If the adjustment component extends from the top to the bottom of the outer shell and is also positioned around the top of the outer shell, the size of the receiving cavity can be adjusted directly without the need for the retaining assembly.

[0070] Of course, the slit can also extend from the top of the cavity to the bottom of the cavity, and the slit can penetrate the top and bottom of the cavity.

[0071] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A prosthesis receiving cavity with a composite structure, characterized in that, The prosthesis receiving cavity is defined with a receiving cavity for accommodating the residual limb, the prosthesis receiving cavity comprising: The housing has at least one slit extending from the top of the receiving cavity to the bottom of the receiving cavity; A connecting piece, wherein the connecting piece is disposed at at least one slit in the housing and connected to the housing, and the connecting piece is stretchable and deformable; An adjustment component is disposed on the housing or the connecting piece, and the adjustment component is used to adjust the size of the at least one slit.

2. The prosthesis receiving cavity according to claim 1, characterized in that: The adjustment assembly includes at least one adjustment rope and a knob rope winder. The at least one adjustment rope is wound around the outside of the housing, passes over the at least one slit, and is connected to the knob rope winder. The knob rope winder is used to adjust the tension of the at least one adjustment rope to adjust the size of the at least one slit.

3. The prosthesis receiving cavity according to claim 1, characterized in that: The adjustment assembly includes at least one tightening rope and at least two fixing parts. The at least two fixing parts are disposed on opposite sides of the housing located at the at least one slit. The two ends of the at least one tightening rope cross and pass through the fixing parts from the bottom of the receiving cavity upwards so as to be tied to the surface of the housing. The at least one tightening rope is used to adjust the size of the at least one slit.

4. The prosthesis receiving cavity according to claim 1, characterized in that: The adjustment assembly includes two zipper tabs and a zipper pull slidably disposed between the two zipper tabs. The two zipper tabs are disposed on opposite sides of the housing located at the at least one slit. The zipper pull is pulled upward from the bottom end of the receiving cavity to tighten the side wall of the receiving cavity and adjust the size of the at least one slit.

5. The prosthesis receiving cavity according to claim 1, characterized in that: The adjustment assembly includes two zipper tabs and a slider slidably disposed between the two zipper tabs. The two zipper tabs are disposed on a connecting piece. The slider is pulled upward from the bottom end of the receiving cavity to close the side wall of the receiving cavity and tighten it to adjust the size of the at least one slit.

6. The prosthesis receiving cavity according to claim 1, characterized in that: The adjustment assembly includes a fixed adhesive part and a movable adhesive part, which are respectively disposed on opposite sides of the housing located at the at least one slit. The fixed adhesive part and the movable adhesive part can be bonded together to adjust the size of the at least one slit.

7. The prosthesis receiving cavity according to claim 1, characterized in that: It also includes a buffer layer, the shape of which is adapted to the outer shell and fits against the inner circumferential surface of the outer shell, and at least one of the outer shell and the buffer layer is provided with vent holes.

8. The prosthesis receiving cavity according to claim 1, characterized in that: The connecting piece is made of a flexible material, while the outer shell is made of a rigid material, and the hardness of the outer shell is greater than that of the connecting piece.

9. A prosthetic assistive device, characterized in that: It includes the prosthesis receiving cavity and support member as described in any one of claims 1 to 8, wherein the support member is connected to the bottom of the prosthesis receiving cavity.

10. The prosthetic assistive device according to claim 9, characterized in that, The support component is a retractable structure.

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