Multi-sac prosthetic socket

Abstract

The invention relates to a multi-sac prosthetic socket, which comprises a shell, a base, a sac group, a sensor and a control unit, and is characterized in that the shell is used for forming a cavity for wrapping a residual limb; the base is arranged at the bottom of the shell and connected with an artificial limb; the liquid bag set comprises a plurality of liquid bag modules which are laid on the inner side of the cavity and used for clamping the residual limb. The sensor is arranged on the side, away from the inner side of the cavity, of the liquid bag module and used for monitoring pressure borne by the stump. The control unit is arranged on the outer side of the shell and used for being in signal connection with the sensor and the liquid bag module. Compared with the prior art, the artificial limb socket has the advantages that the artificial limb socket can effectively transmit force during use and can controllably and automatically adapt to the change of the volume of the residual limb, constant force loading on the surface of the residual limb is realized, the wearing comfort is improved, multiple stress points are provided for stress, the stress on the residual limb is more uniform, meanwhile, the heat dissipation area of the skin of the residual limb is increased, and the heat dissipation efficiency is improved. And the risk of skin diseases caused by sweating, temperature rise and other factors of the stump is avoided.

Description

Technical Field

[0001] The present invention relates to the field of medical rehabilitation devices, and particularly to a multi-fluid sac type prosthetic socket. Background Art

[0002] Installing a prosthesis is the only engineering method for amputee patients to restore the shape of the residual limb and compensate for the missing limb. The prosthetic socket is the connecting part between the residual limb and the prosthesis and is the main basis for the prosthesis to function. There are various structures of prosthetic sockets on the market.

[0003] According to incomplete statistics of the World Health Organization, the number of patients with limb disabilities caused by diseases, wars, and accidents exceeds 300 million. Most of these patients choose amputation to protect their lives due to limited local medical levels. With the increase in life expectancy, some diffuse diseases of the limbs can be detected earlier, and the number of amputations may further increase. The prosthetic socket is not only a connecting component between the prosthesis and the human residual limb but also an interface component between the human body and the mechanical system. Its function is to wrap the residual limb and effectively transfer force to the distal end of the prosthesis. With the improvement of the quality of life, the basic performance of the current prosthetic socket can no longer meet the needs of amputees, bringing many inconveniences to the daily life of amputees, such as poor adaptability, low wearing comfort, easy injury and skin diseases after long-term wearing, which is the main reason for some current amputees to abandon the prosthesis. Therefore, it is necessary to optimize the design of the prosthetic socket to meet the urgent needs of current amputees.

[0004] For example, CN215384916U discloses a prosthetic socket. By using an inner cavity that can be thermoplastically deformed, the adjustable performance of the inner cavity size can be achieved, so that the inner cavity size can be adjusted to continue to fit the size of the residual limb after the residual limb atrophies, achieving the effect of repeated use. However, when adjusting the size of the prosthetic socket, it is necessary to disassemble the entire inner cavity and perform corresponding thermoplastic deformation, which is rather cumbersome. Summary of the Invention

[0005] The purpose of the present invention is to overcome the problems existing in the existing prosthetic sockets, such as poor adaptability, low wearing comfort, injury and skin diseases caused by long-term wearing, etc., and thus provide a multi-fluid sac type prosthetic socket.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] The technical solution of the present invention is to provide a multi-fluid sac type prosthetic socket, including a housing, a base, a fluid sac group, a sensor, and a control unit, wherein:

[0008] The housing is used to form a cavity for wrapping the residual limb;

[0009] The base is arranged at the bottom of the housing and is used to connect with the prosthesis;

[0010] The liquid sac group includes a number of liquid sac modules, which are respectively laid on the inner side of the cavity for clamping the residual limb;

[0011] The sensor is arranged on the side of the liquid sac module away from the inner side of the cavity for monitoring the pressure on the residual limb;

[0012] The control unit is arranged on the outer side of the housing for signal connection with the sensor and the liquid sac module.

[0013] In some specific embodiments, the housing includes a housing body for forming a cavity for wrapping the residual limb, a top cover arranged on the upper edge of the housing body, and a bottom cover arranged on the lower edge of the housing body. The housing body is a honeycomb-shaped housing composed of a number of Y-shaped small shells connected together.

[0014] In some specific embodiments, a Y-shaped empty groove is arranged inside the Y-shaped small shell.

[0015] In some specific embodiments, the liquid sac module includes a liquid sac, a liquid pump group, and a liquid storage sac, where:

[0016] The liquid sac includes an interface and a connecting piece arranged at the interface;

[0017] The liquid pump group and the liquid storage sac are communicated with each other and arranged inside the Y-shaped small shell. The liquid pump group also passes through the Y-shaped small shell and is communicated with the liquid sac through the connecting piece.

[0018] In some specific embodiments, the liquid pump group includes a liquid pump signal-connected to the control unit, a lower interface arranged at the bottom of the liquid pump for connecting with the connecting piece, and a side interface arranged on the side of the liquid pump for communicating with the liquid storage sac.

[0019] In some specific embodiments, there are 3 side interfaces.

[0020] In some specific embodiments, the liquid storage sac includes a liquid storage sac bag and a liquid storage sac outer interface arranged at one end of the liquid storage sac bag for connecting with the side interface.

[0021] In some specific embodiments, 18 liquid sac modules are arranged on the same horizontal plane of the housing.

[0022] In some specific embodiments, the base includes a base housing and a base inner lining arranged inside the base housing. A base connection port for connecting the prosthetic limb is arranged at the bottom of the base housing. A number of perforations for heat dissipation are arranged on both the base housing and the base inner lining.

[0023] In some specific embodiments, both the base housing and the base inner lining are in an arc shape that is wider at the top and narrower at the bottom.

[0024] As a more preferred embodiment, the base lining is made of silicone.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The liquid capsule group of the prosthetic receiving cavity of the present invention adopts an independent liquid capsule module, which can be controlled and adjusted in time and area according to the individual shape and structure of the residual limb. For example, a certain liquid pump can be controlled individually to control the flow direction of the liquid and improve the local hydraulic pressure. Multiple liquid pumps can also be controlled as a whole to improve the overall hydraulic pressure. By exchanging and controlling the local hydraulic pressure, a massage function can be achieved, and the residual limb wrapped by the shell can also be subjected to balanced force, promoting blood circulation of the residual limb, and reducing muscle damage and pressure sores. The independent liquid capsule module is also easy to disassemble and repair, and does not need to be replaced as a whole.

[0027] (2) The prosthetic receiving cavity of the present invention uses the hydraulic pressure of the liquid in the liquid bag to clamp the residual limb. Since the liquid has better fluidity and fits the residual limb more closely, the wearing comfort of the patient is improved and the possibility of skin diseases is reduced.

[0028] (3) The prosthetic receiving cavity of the present invention is provided with a plurality of sensors, which can monitor the pressure changes of the residual limb in real time, and control the volume of the liquid bag through the central control unit to adapt to the volume changes of the residual limb, thereby improving the adaptability of the prosthetic receiving cavity and the residual limb.

[0029] (4) The shell of the prosthetic receiving cavity of the present invention is honeycomb-shaped, which has excellent geometric mechanical properties, such as light weight, high strength, good rigidity, impact resistance, good vibration reduction, etc. At the same time, due to the particularity of the hexagonal honeycomb structure, the honeycomb structure that meets different needs can be designed by changing the size and arrangement of the cells, which is easy to manufacture and low in cost.

[0030] (5) The present invention can ensure the effective and controllable force transmission of the prosthetic receiving cavity when in use, automatically adapt to changes in the volume of the residual limb, achieve constant force loading on the surface of the residual limb, improve wearing comfort, provide multiple force points to make the residual limb more evenly stressed, and at the same time increase the heat dissipation area of ​​the residual limb skin, avoiding the risk of skin diseases caused by sweating and temperature increase in the residual limb. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of a multi-liquid-capsule prosthetic receiving cavity.

[0032] Figure 2 Schematic diagram of the positional relationship between the sensor and the liquid capsule module.

[0033] Figure 3 Schematic diagram of the structure of the liquid capsule module.

[0034] Figure 4 It is a schematic structural diagram of a liquid sac.

[0035] Figure 5 It is a schematic structural diagram of a liquid pump group.

[0036] Figure 6 It is a schematic structural diagram of a liquid storage sac.

[0037] Figure 7 It is a schematic structural diagram of a Y-shaped small shell.

[0038] Figure 8 It is a schematic structural diagram of a housing.

[0039] Figure 9 It is a schematic structural diagram of a base.

[0040] The markings in the figure are as follows:

[0041] 1 is a sensor, 2 is a liquid sac group, 20 is a liquid sac module, 21 is a liquid sac, 22 is a connecting piece, 23 is a liquid pump group, 231 is a liquid pump, 232 is a side interface, 233 is a lower interface, 24 is a liquid storage sac, 241 is an external interface of the liquid storage sac, 242 is a liquid storage sac bag, 3 is a housing, 31 is a top cover, 32 is a housing body, 321 is a Y-shaped small shell, 33 is a bottom cover, 4 is a base, 41 is a base lining, 42 is a base housing, 43 is a base connection port, 5 is a central control unit. Specific implementation manners

[0042] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0043] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0044] Some implementation manners of the present invention will be described in detail below with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0045] In the following embodiments, if there is no specifically described functional component or structure, it means that they are all conventional components or conventional structures adopted in the art to achieve the corresponding functions.

[0046] Embodiment 1

[0047] As Figures 1 to 9As shown in the figure, this embodiment provides a multi-sac type prosthetic socket, which includes a housing 3, a base 4, a sac group 2, a sensor 1, and a control unit 5, where: the housing 3 is used to form a cavity for wrapping the residual limb; the base 4 is arranged at the bottom of the housing 3 and is used to connect with the prosthetic limb; the sac group 2 includes several sac modules 20, which are respectively laid on the inner side of the cavity and are used to clamp the residual limb; the sensor 1 is arranged on the side of the sac module 20 away from the inner side of the cavity and is used to monitor the pressure on the residual limb; the control unit 5 is arranged outside the housing 3 and is used for signal connection with the sensor 1 and the sac module 20.

[0048] In this technical solution, the residual limb is clamped by using the hydraulic pressure of the liquid in the sac module 20. Since the liquid has good fluidity, it can fit the residual limb more closely, improve the comfort of the patient wearing, and reduce the possibility of skin diseases. The sac modules 20 are also independent of each other, and can achieve time-sharing and zone control, so as to realize the balanced force on the residual limb, promote the blood circulation of the residual limb, and reduce pressure sores. The sensor 1 can be a thin-film pressure sensor, which directly contacts the residual limb, senses the pressure on the residual limb and thus feedbacks the volume change of the residual limb. In this technical solution, the sensor 1 can sense the pressure on the residual limb in real time and transmit the pressure signal to the control unit 5. After receiving the signal, the control unit 5 analyzes it and adjusts the hydraulic pressure of the corresponding sac module 20 to adapt to the volume change of the residual limb, improve the adaptability between the prosthetic socket and the residual limb. For example, a certain sac module 20 can be controlled alone to control the liquid flow direction and increase the local hydraulic pressure, or multiple sac modules 20 can be controlled as a whole to increase the overall hydraulic pressure. By exchanging control of the local hydraulic pressure, a massage function can also be achieved, realizing time-sharing and zone control.

[0049] In this embodiment, the control unit 5 is a common signal receiving and processing device in the art. Exemplarily, such as a PLC controller, a PID controller, etc.

[0050] More specifically, as Figure 8 shown, the housing 3 includes a housing body 32 for forming a cavity for wrapping the residual limb, a top cover 31 arranged on the upper edge of the housing body 32, and a bottom cover 33 arranged on the lower edge of the housing body 32. The housing body 32 is a honeycomb-shaped housing formed by connecting several Y-shaped small shells 321 into one body. The honeycomb structure has excellent geometric and mechanical properties such as light weight, high strength, good rigidity, impact resistance, and good vibration damping. And since the honeycomb structure is composed of hexagonal cells, a honeycomb structure that meets different requirements can be obtained by adjusting the size and arrangement of the cells, which is convenient to prepare and has low cost. When in use, when the residual limb changes greatly, the distance between the sac 21 and the residual limb can be adjusted by adjusting the diameter of the housing 3, so that a larger volume of the residual limb can be accommodated, and corresponding changes can be made until the residual limb feels comfortable, relieving the situation that the force on the residual limb is too large or too small, enabling the residual limb to receive a comfortable constant force during volume change, and ensuring the performance of the prosthetic socket.

[0051] As shown Figures 3 to 7 in the figure, the inside of the Y-shaped small shell 321 is provided with a Y-shaped empty groove. The liquid sac module 20 includes a liquid sac 21, a liquid pump group 23, and a liquid storage sac 24. Among them: the liquid sac 21 includes an interface and a connector 22 provided at the interface. The liquid pump group 23 and the liquid storage sac 24 are interconnected and arranged in the Y-shaped empty groove. The liquid pump group 23 also passes through the Y-shaped small shell 321 and is connected to the liquid sac 21 through the connector 22. The liquid pump group 23 includes a liquid pump 231 signal-connected to the control unit 5, a lower interface 233 provided at the bottom of the liquid pump 231 for connecting to the connector 22, and a side interface 232 provided at the side of the liquid pump 231 for communicating with the liquid storage sac 24. The liquid storage sac 24 includes a liquid storage sac bag 242 and a liquid storage sac outer interface 241 provided at one end of the liquid storage sac bag 242 for connecting to the side interface 232. As a more preferred technical solution, the liquid pump 231 is located in the center of the Y-shaped empty groove. The liquid pump 231 is provided with 3 side interfaces 232 respectively facing each branch groove of the Y-shaped empty groove, connecting 3 liquid storage sacs 24 respectively located in the branch grooves. The liquid pump 231 is a kind of three-way and relatively miniature servo motor / variable frequency control pump. After receiving the signal transmitted by the control unit 5, the liquid pump 321 can control the liquid flow direction and flow rate in the liquid sac group 2 (the servo motor rotates forward and backward to directly drive the pump to change the liquid flow direction, and precisely adjusts the motor speed or pulse frequency to change the liquid flow rate), and can change the volume of the liquid sac 21 in real time to adapt to the volume change of the residual limb and improve the adaptability between the prosthetic socket and the residual limb. The liquid injected into the liquid sac 21 can be a kind of low-density liquid, so as to reduce the overall weight of the prosthetic socket.

[0052] Exemplarily, on the same horizontal plane, 18 liquid sac modules 20 are provided, forming a large liquid sac group in a 36-sided ring shape for clamping the residual limb on the same horizontal plane. By longitudinally and cross-arranging multiple large liquid sac groups in a 36-sided ring shape and combining them with each other, the length can be changed to be suitable for prosthetics of different lengths.

[0053] As shown Figure 9 in the figure, the base 4 includes a base housing 42 and a base lining 41 provided inside the base housing 42. A base connection port 43 for connecting the prosthetic limb is provided at the bottom of the base housing 42. A number of perforations for heat dissipation are provided on both the base housing 42 and the base lining 41. Both the base housing 42 and the base lining 41 are in an arc shape with a wider top and a narrower bottom, suitable for the shape of the residual limb end. As a more preferred option, the material of the base lining 41 is silicone.

[0054] The present invention can ensure the effective transmission and controllability of forces during the use of the prosthetic socket, automatically adapt to changes in the volume of the residual limb, achieve constant force loading on the surface of the residual limb, improve the wearing comfort, provide multiple force application points for force application, make the force on the residual limb more uniform, and at the same time increase the heat dissipation area of the residual limb skin, avoiding the risk of skin diseases on the residual limb caused by factors such as sweating and rising temperature.

[0055] The above description of the embodiments is to enable those of ordinary skill in the art to understand and use the invention. Obviously, those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present invention is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. A multi-fluid sac type prosthetic socket, characterized in that, It includes a housing (3), a base (4), a liquid sac group (2), a sensor (1), and a control unit (5), where: The housing (3) is used to form a cavity for wrapping the residual limb; The base (4) is provided at the bottom of the housing (3) and is used to connect with the prosthetic limb; The liquid sac group (2) includes several liquid sac modules (20), which are respectively laid on the inner side of the cavity and are used to clamp the residual limb; The sensor (1) is provided on the side of the liquid sac module (20) away from the inner side of the cavity and is used to monitor the pressure received by the residual limb; The control unit (5) is provided outside the housing (3) and is used to be signal-connected to the sensor (1) and the liquid sac module (20).

2. The multi-fluid sac type prosthetic socket according to claim 1, characterized in that, The housing (3) includes a housing body (32) for forming a cavity for wrapping the residual limb, a top cover (31) provided at the upper edge of the housing body (32), and a bottom cover (33) provided at the lower edge of the housing body (32). The housing body (32) is a honeycomb-shaped housing composed of several Y-shaped small shells (321) connected together.

3. The multi-fluid sac type prosthetic socket according to claim 2, wherein, The interior of the Y-shaped small shell (321) is provided with a Y-shaped empty groove.

4. The multi-fluid sac type prosthetic socket according to claim 2, wherein, The liquid sac module (20) includes a liquid sac (21), a liquid pump group (23), and a liquid storage sac (24), where: The liquid sac (21) includes an interface and a connecting piece (22) provided at the interface; The liquid pump group (23) and the liquid storage sac (24) are interconnected and are provided in the Y-shaped small shell (321). The liquid pump group (23) also passes through the Y-shaped small shell (321) and is connected to the liquid sac (21) through the connecting piece (22).

5. The multi-fluid sac type prosthetic socket according to claim 4, characterized in that, The liquid pump group (23) includes a liquid pump (231) signal-connected to the control unit (5), a lower interface (233) provided at the bottom of the liquid pump (231) and used to connect with the connecting piece (22), and a side interface (232) provided on the side of the liquid pump (231) and used to communicate with the liquid storage sac (24).

6. The multi-fluid sac type prosthetic socket according to claim 5, characterized in that, There are 3 side interfaces (232).

7. The multi-fluid sac type prosthetic socket according to claim 5, characterized in that, The liquid storage sac (24) includes a liquid storage sac bag (242) and a liquid storage sac outer interface (241) provided at one end of the liquid storage sac bag (242) and used to connect with the side interface (232).

8. The multi-fluid sac type prosthetic socket according to claim 1, characterized in that, At the same horizontal plane of the housing (3), there are 18 liquid sac modules (20).

9. The multi-fluid sac type prosthetic socket according to claim 1, characterized in that, The base (4) includes a base housing (42) and a base inner lining (41) provided inside the base housing (42). A base connection port (43) for connecting the prosthetic limb is provided at the bottom of the base housing (42). A number of perforations for heat dissipation are provided on both the base housing (42) and the base inner lining (41).

10. The multi-fluid sac type prosthetic socket according to claim 9, characterized in that, Both the base housing (42) and the base inner lining (41) are in an arc shape with a wider upper part and a narrower lower part.

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