Hydraulic heel adjusting type artificial limb foot plate

Abstract

The utility model relates to the technical field of prostheses, and discloses a hydraulic heel-adjusting prosthetic foot plate which comprises a rocker arm and a prosthetic body, a hydraulic cylinder is rotatably mounted on the rocker arm, one end, far away from the rocker arm, of the hydraulic cylinder is rotatably mounted on the foot plate, an oil cavity communicated with the hydraulic cylinder is arranged in the rocker arm, and an adjusting button is arranged on the rocker arm. A connecting block is arranged at the top of the rocker arm, a butt-joint groove is formed in the connecting block, a butt-joint block matched with the butt-joint groove is arranged at the bottom of the artificial limb body in a protruding mode, and when the rocker arm is connected with the artificial limb body, the butt-joint block at the bottom of the artificial limb body can be inserted into the butt-joint groove in the connecting block. At the moment, sliding shafts on transmission sliding blocks can slide along arc-shaped guide grooves by rotating an annular rotating disc, and meanwhile, the multiple transmission sliding blocks can be synchronously close to one another and inserted into lock holes in a butt joint block by limiting the moving directions of the transmission sliding blocks through sliding holes, so that locking and fixing between the rocker arm and the artificial limb body are completed; otherwise, the disassembly can be realized.

Description

Technical Field

[0001] This utility model relates to the field of prosthetics technology, specifically to a hydraulically adjustable prosthetic footplate. Background Technology

[0002] Currently, most prosthetic footplates on the market are made of wood with non-adjustable heel height, such as PU plastic or carbon fiber footplates. When amputees wear shoes of different heights, because the prosthetic footplate cannot adjust the heel height, the body tends to lean forward or backward. To adapt to this physiologically incompatible angle, the body forcibly compresses the residual limb to achieve a balanced angle. In this situation, the person wearing the prosthesis experiences a large amount of friction and actively sweats to evaporate heat, causing a sudden increase in the pressure on the patient's muscles within the prosthetic socket. The force is concentrated on the residual limb, leading to blisters, skin abrasions, and bleeding. This causes drastic changes in the temperature and humidity of the amputee's residual limb, resulting in skin damage, bacterial infection, and various skin problems. Amputees are also more prone to losing balance and falling due to the mismatch between the shoe heel and the prosthetic heel height. In more serious cases, this can lead to fractures and secondary disabilities. The seemingly simple problem of the non-adjustable heel height of the prosthesis creates various obstacles for amputees in their travel, daily life, and sports activities. Amputees can only repeatedly visit fitting centers to adjust their prostheses, and these centers also have to spend considerable time and energy on these repetitive adjustments, consuming a significant amount of the amputee's time, energy, and social resources. Furthermore, lower limb amputees cannot return to the fitting center to adjust the prosthesis alignment every time they change shoes, nor can they ensure that every pair of shoes has the same standard heel thickness, causing significant disruption to their work and daily life. This problem is not a usability issue for lower limb amputees, but rather a technical issue with prostheses. Currently, prostheses are custom-made by technicians based on the user's residual limb, and it cannot be guaranteed that the angle of the prosthesis will conform to bionics requirements for everyone.

[0003] Patent CN 217409078 U discloses a hydraulically adjustable prosthetic footplate, comprising a hydraulic cylinder and a footplate. The piston of the hydraulic cylinder is slidably disposed within the inner cavity of the cylinder body, forming two oil chambers by separating the inner cavity. A base is provided between the footplate and the hydraulic cylinder. The piston rod and cylinder body of the hydraulic cylinder are respectively hinged to the base. A locking groove is provided at the end of the cylinder body away from the footplate, through which the piston rod passes and extends into the locking groove. An adjustment button is movably inserted on the hydraulic cylinder. This utility model's hydraulically adjustable prosthetic footplate hinges the cylinder body and piston rod of the hydraulic cylinder to the base on the footplate. The adjustment button controls the hydraulic cylinder, using the pressure of the residual limb to push the piston rod, thereby tilting the base upwards or downwards, causing the heel to tilt and conform to the shoe heel height. This allows lower limb amputees to adjust the prosthesis themselves after fitting, simply achieving the bionic alignment standard required by human anatomy.

[0004] However, the device only connects and fixes the rocker arm to the prosthesis through a locking tube. The connection process requires bolts, making the assembly and disassembly process cumbersome and prone to angular displacement during use. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a hydraulically adjustable prosthetic footplate, solving the aforementioned technical problems.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a hydraulically adjustable prosthetic footplate, comprising a rocker arm and a prosthetic body. A hydraulic cylinder is rotatably mounted on the rocker arm, with the end of the hydraulic cylinder away from the rocker arm rotatably mounted on the footplate. An oil chamber communicating with the hydraulic cylinder is provided inside the rocker arm. An adjustment knob is provided on the rocker arm. A connecting block is provided at the top of the rocker arm, and a docking groove is provided on the connecting block. A docking block adapted to the docking groove is protruding from the bottom of the prosthetic body. A transmission cavity is provided inside the connecting block, and an annular rotating disk is rotatably mounted inside the transmission cavity. An annular groove is provided on the annular rotating disk. Several symmetrical arc-shaped guide grooves are provided on the inner walls of the top and bottom of the annular groove, spaced apart along the circumferential direction. A sliding shaft is slidably arranged in the arc-shaped guide groove, and a transmission slider is mounted on the sliding shaft. Several sliding holes spaced apart along the circumferential direction and communicating with the docking groove are provided on the inner wall of the annular groove. Several locking holes adapted to the transmission slider are provided on the docking block.

[0009] Preferably, the bottom inner wall of the docking groove is provided with an internal hexagonal slot, and the bottom of the docking block is provided with a hexagonal plug that is compatible with the internal hexagonal slot.

[0010] Preferably, a guide groove communicating with the outside is provided on one side inner wall of the docking groove, and two mutually symmetrical slots are provided on the bottom inner wall of the guide groove.

[0011] Preferably, a limiting groove is provided on the outer wall of the annular rotating disk, a movable block is slidably arranged in the limiting groove, and an adjusting rod is protruding on the movable block, which extends to the outside through the guide groove.

[0012] Preferably, a compression spring is arranged inside the limiting slide groove, with one end of the compression spring abutting against the inner wall of the limiting slide groove and the other end of the compression spring abutting against the movable block.

[0013] Preferably, a plurality of the lock holes are arranged at intervals along the circumferential direction on the mating block.

[0014] Preferably, every two sliding shafts with the smallest spacing are mounted on the same transmission slider.

[0015] Compared with the prior art, this utility model provides a hydraulically adjustable prosthetic footplate, which has the following beneficial effects:

[0016] 1. In this utility model, through the cooperation of the structure such as the annular rotating disk, the transmission slider and the docking block, when connecting the rocker arm to the prosthesis body, the docking block at the bottom of the prosthesis body can be inserted into the docking groove on the connecting block. At this time, by rotating the annular rotating disk, the sliding shaft on the transmission slider can slide along the arc-shaped guide groove. At the same time, the sliding hole restricts the movement direction of the transmission slider, so that several transmission sliders can synchronously approach each other and be inserted into the locking hole on the docking block to complete the locking and fixing between the rocker arm and the prosthesis body. Conversely, disassembly can be achieved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a top cross-sectional view of the connecting block and transmission slider of this utility model.

[0019] Figure 3 This is a side cross-sectional view of the transmission slider and sliding shaft of this utility model.

[0020] Figure 4 For the present utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0021] Figure 5 For the present utility model Figure 3 Enlarged schematic diagram of the structure at point B.

[0022] The components are: 1. Rocker arm; 2. Hydraulic cylinder; 3. Connecting block; 4. Prosthetic body; 5. Adjusting knob; 6. Connecting block; 7. Hexagonal insert; 8. Socket hexagonal slot; 9. Oil chamber; 10. Guide groove; 11. Slot; 12. Movable block; 13. Adjusting rod; 14. Annular rotating disk; 15. Arc-shaped guide groove; 16. Transmission slider; 17. Annular groove; 18. Sliding hole; 19. Locking hole; 20. Compression spring; 21. Sliding shaft; 22. Connecting groove; 23. Transmission chamber; 24. Limiting slide groove. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship 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. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figure 1-5 A hydraulically adjustable prosthetic footplate includes a rocker arm 1 and a prosthetic body 4. A hydraulic cylinder 2 is rotatably mounted on the rocker arm 1, with the end of the hydraulic cylinder 2 away from the rocker arm 1 rotatably mounted on the footplate. An oil chamber 9 communicating with the hydraulic cylinder 2 is provided inside the rocker arm 1. An adjustment knob 5 is provided on the rocker arm 1. A connecting block 3 is provided at the top of the rocker arm 1, and a mating groove 22 is formed on the connecting block 3. A mating block 6 adapted to the mating groove 22 is protruding from the bottom of the prosthetic body 4. A transmission cavity 23 is formed inside the connecting block 3, and a rotatable... The device is equipped with an annular rotating disk 14, on which an annular groove 17 is formed. Several symmetrical arc-shaped guide grooves 15 are formed on the inner walls of the top and bottom of the annular groove 17 and are spaced apart along the circumference. A sliding shaft 21 is slidably arranged in the arc-shaped guide groove 15, and a transmission slider 16 is installed on the sliding shaft 21. Several sliding holes 18 are formed on the inner wall of the annular groove 17 and are spaced apart along the circumference and communicate with the docking groove 22. Several locking holes 19 that are adapted to the transmission slider 16 are formed on the docking block 6.

[0027] Through the cooperation of the annular rotating disk 14, the transmission slider 16, and the docking block 6, when connecting the rocker arm 1 to the prosthetic body 4, the docking block 6 at the bottom of the prosthetic body 4 can be inserted into the docking groove 22 on the connecting block 3. At this time, by rotating the annular rotating disk 14, the sliding shaft 21 on the transmission slider 16 can slide along the arc-shaped guide groove 15. At the same time, the sliding hole 18 restricts the movement direction of the transmission slider 16, so that several transmission sliders 16 can synchronously approach each other and be inserted into the locking hole 19 on the docking block 6 to complete the locking and fixing between the rocker arm 1 and the prosthetic body 4. Conversely, disassembly can be achieved. The mechanism for adjusting the heel angle through the hydraulic cylinder 2 and the oil chamber 9 is the same as the hydraulic adjustment mechanism in the hydraulic heel-adjusting prosthetic footplate disclosed in patent CN 217409078U, and will not be described in detail here.

[0028] Specifically, in this embodiment, an internal hexagonal slot 8 is provided on the bottom inner wall of the docking groove 22, and a hexagonal plug 7 that is adapted to the internal hexagonal slot 8 is protruding from the bottom of the docking block 6.

[0029] Through the cooperation of the internal hexagonal slot 8 and the hexagonal insert 7, the position of the mating block 6 is restricted after it is inserted into the mating groove 22, and it will not easily rotate.

[0030] Specifically, in this embodiment, a guide groove 10 communicating with the outside is provided on one side inner wall of the docking groove 22, and two mutually symmetrical slots 11 are provided on the bottom inner wall of the guide groove 10. A limiting slide groove 24 is provided on the outer side wall of the annular rotating disk 14, and a movable block 12 is slidably arranged in the limiting slide groove 24. An adjusting rod 13 is protruding on the movable block 12, and the adjusting rod 13 extends through the guide groove 10 to the outside.

[0031] By setting the guide groove 10 and the slot 11, the movement range of the adjusting rod 13 can be limited, and the adjusting rod 13 can be locked into the slot 11 after adjusting the annular rotating disk 14 by adjusting the annular rotating disk 14.

[0032] Specifically, in this embodiment, a compression spring 20 is arranged inside the limiting slide groove 24. One end of the compression spring 20 abuts against the inner wall of the limiting slide groove 24, and the other end of the compression spring 20 abuts against the movable block 12.

[0033] By setting the compression spring 20, the movable block 12 can always be pressed against the inner wall of the limiting slide groove 24, and the adjusting rod 13 can always be locked in the slot 11 under normal conditions, further ensuring the stability of the annular rotating disk 14 when it is self-locking.

[0034] Specifically, in this embodiment, a plurality of lock holes 19 are arranged at intervals along the circumferential direction on the mating block 6.

[0035] Specifically, in this embodiment, every two sliding shafts 21 with the smallest spacing are mounted on the same transmission slider 16.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic follow-through prosthetic foot plate comprising a rocker and a prosthetic body, characterized in that: The hydraulic cylinder is rotatably installed on the rocker arm, and the end of the hydraulic cylinder away from the rocker arm is rotatably installed on the foot plate, the rocker arm is provided with an oil cavity communicated with the hydraulic cylinder, the rocker arm is provided with an adjusting knob, the top of the rocker arm is provided with a connecting block, the connecting block is provided with a butt joint groove, the bottom of the prosthesis body is provided with a butt joint block matched with the butt joint groove, the connecting block is provided with a transmission cavity, the transmission cavity is rotatably provided with an annular rotating disc, the annular rotating disc is provided with an annular groove, the top and bottom inner walls of the annular groove are provided with a plurality of arc-shaped guide grooves matched with each other and arranged along the circumferential direction, the arc-shaped guide grooves are slidably provided with sliding shafts, the sliding shafts are provided with transmission sliding blocks, the inner wall of the annular groove is provided with a plurality of sliding holes arranged along the circumferential direction and communicated with the butt joint groove, and the butt joint block is provided with a plurality of lock holes matched with the transmission sliding blocks.

2. A hydraulic foot plate according to claim 1, characterized in that: The bottom inner wall of the butt joint groove is provided with an internal hexagonal slot, and the bottom of the butt joint block is provided with a hexagonal plug matched with the internal hexagonal slot.

3. A hydraulic foot plate according to claim 1, characterized in that: The inner wall of one side of the butt joint groove is provided with a guide groove communicated with the outside, and the bottom inner wall of the guide groove is provided with two symmetrical clamping grooves.

4. A hydraulic foot plate according to claim 1, characterized in that: The outer side wall of the annular rotating disc is provided with a limiting sliding groove, the limiting sliding groove is slidably provided with a movable block, the movable block is provided with an adjusting rod, and the adjusting rod extends to the outside through the guide groove.

5. A hydraulic foot plate according to claim 4, characterized in that: The limiting sliding groove is provided with a compression spring, one end of the compression spring abuts against the inner wall of the limiting sliding groove, and the other end of the compression spring abuts against the movable block.

6. A hydraulic foot plate according to claim 1, characterized in that: A plurality of lock holes are arranged on the butt joint block along the circumferential direction.

7. A hydraulic foot plate according to claim 1, characterized in that: Every two smallest spacing sliding shafts are installed on the same transmission sliding block.

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