A stable prosthetic foot plate structure

Abstract

The utility model relates to the technical field of artificial limb, and disclose a stable artificial limb footboard structure, including heel, sole and connecting piece, the heel welding in sole one side, the connecting piece set up in the top of sole and heel, the transmission cavity is opened in the sole, and the transmission gear is rotatably installed in transmission cavity, can be through pulling up the pull ring, makes transmission gear vertical motion and carries out the meshing with the first transmission slider or second transmission slider that corresponding need adjustment, to the first transmission slider or second transmission slider can be driven transmission gear rotation through screwing the pull ring, and then makes two first transmission slider synchronous telescopic or makes second transmission slider telescopic, realizes side telescopic part or front telescopic part telescopic, to realize the total width or total length of adjusting sole, makes sole can adapt to the demand of different users, and through the setting of self -locking block and self -locking groove, can be convenient for to the self -locking fixed of adjusting after side telescopic part or front telescopic part.

Description

Technical Field

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

[0002] As is well known, a prosthesis is an artificial prosthesis specially designed, manufactured, and fitted using engineering techniques to compensate for amputees or those with incomplete limb loss. Its main function is to replace some of the functions of the lost limb, enabling amputees to regain a certain degree of self-care and work ability.

[0003] A search revealed a Chinese patent publication dated August 28, 2020, with publication number CN211356083U, describing a prosthetic footplate structure. The structure comprises a footplate body made of nylon, with a forefoot, an arch, and a heel. The forefoot and heel are connected by the arch. The heel has an upper support for supporting the external prosthesis and a lower support for contacting the ground. The upper support has mounting holes for connecting the external prosthesis. The lower support is spaced apart from the upper support. The rear end of the lower support extends backward and protrudes beyond the rear end of the upper support. The gap between the upper and lower support provides space for the upper support to rebound under stress, giving the footplate good resilience and improving comfort. The rearward extension of the lower support beyond the rear end of the upper support provides a sufficiently large contact area, enhancing the stability of the heel's contact with the ground.

[0004] While the aforementioned existing technologies offer good comfort and stability, different patients have varying foot sizes. The size of the prosthetic footplate should match the patient's original foot size to accommodate their walking and shoe-wearing habits. In the aforementioned existing technologies, the size of the prosthetic footplate is relatively fixed, requiring the production of different models and sizes of prosthetic footplates to suit different patients, resulting in high production costs. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a stable prosthetic footplate structure, thus solving the aforementioned technical problems.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a stable prosthetic footplate structure, comprising a heel portion, a foot portion, and a connecting member. The heel portion is welded to one side of the foot portion. The connecting member is disposed at the top of the foot portion and the heel portion. A transmission cavity is provided inside the foot portion, and a transmission gear is rotatably installed inside the transmission cavity. A connecting post is provided at the top of the transmission gear, penetrating the transmission cavity and extending upward to the outside. A limit block is provided at the top of the connecting post, and a pull ring is provided at the top of the limit block. Two first transmission sliders are provided inside the transmission cavity. The ends of the two first transmission sliders that are far apart from each other both extend through the transmission cavity to the outside and are connected to a side telescopic part. A second transmission slider that is perpendicular to the two first transmission sliders is slidably installed inside the transmission cavity. One end of the second transmission slider that penetrates the transmission cavity is connected to a front telescopic part. A compression spring is sleeved on the connecting post. One end of the compression spring abuts against the transmission gear, and the other end of the compression spring abuts against the top inner wall of the transmission cavity.

[0007] Preferably, the bottom of the transmission gear is provided with a rotating block, the bottom of the rotating block is provided with a self-locking block, and the bottom inner wall of the transmission cavity is provided with a self-locking groove that matches the self-locking block.

[0008] Preferably, the self-locking groove is formed by a plurality of conical grooves arranged at intervals along the circumferential direction, and the self-locking block is formed by a plurality of conical protrusions arranged at intervals along the circumferential direction.

[0009] Preferably, both the first and second transmission sliders are provided with toothed grooves that mesh with the transmission gears.

[0010] Preferably, the inner walls on both sides of the transmission cavity are provided with side sliding holes that communicate with the outside, and the two first transmission sliders are respectively slidably arranged in the two side sliding holes.

[0011] Preferably, the transmission cavity has a front sliding hole that communicates with the outside, and the second transmission slider is slidably arranged in the front sliding hole.

[0012] Preferably, the second transmission slider is positioned directly above the two first transmission sliders.

[0013] Compared with the prior art, this utility model provides a stable prosthetic footplate structure, which has the following beneficial effects: 1. This utility model, by providing a transmission gear, a first transmission slider, and a second transmission slider, allows the transmission gear to move vertically and engage with the corresponding first or second transmission slider that needs adjustment by pulling up the pull ring. Twisting the pull ring then drives the transmission gear to rotate, causing the two first transmission sliders to extend and retract synchronously, or causing the second transmission slider to extend and retract, thus adjusting the side or front extension section. This allows for adjustment of the total width or length of the foot, adapting to the needs of different users. Furthermore, the self-locking block and self-locking groove facilitate self-locking and fixing of the adjusted side or front extension section. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a side cross-sectional structural diagram of the connecting column and pull ring of this utility model. Figure 3 This is a top cross-sectional view of the connecting column and foot part of the present invention. Figure 4 For the present utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0015] The components are: 1. Connector; 2. Heel; 3. Foot; 4. Side sliding hole; 5. First transmission slider; 6. Side telescopic part; 7. Front telescopic part; 8. Transmission cavity; 9. Self-locking groove; 10. Self-locking block; 11. Rotating block; 12. Second transmission slider; 13. Gear groove; 14. Connecting column; 15. Compression spring; 16. Front sliding hole; 17. Transmission gear; 18. Limiting block; 19. Pull ring. Detailed Implementation

[0016] 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.

[0017] 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.

[0018] 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.

[0019] Please see Figure 1-4 A stable prosthetic footplate structure includes a heel portion 2, a foot portion 3, and a connector 1. The heel portion 2 is welded to one side of the foot portion 3. The connector 1 is disposed at the top of the foot portion 3 and the heel portion 2. A transmission cavity 8 is provided in the foot portion 3. A transmission gear 17 is rotatably installed in the transmission cavity 8. A connecting post 14 is provided at the top of the transmission gear 17, penetrating the transmission cavity 8 and extending upward to the outside. A limit block 18 is provided at the top of the connecting post 14. A pull ring 19 is provided at the top of the limit block 18. Two first transmission sliders 5 are provided in the transmission cavity 8. The ends of the two first transmission sliders 5 that are far apart from each other both extend through the transmission cavity 8 to the outside and are connected to a side telescopic part 6. A second transmission slider perpendicular to the two first transmission sliders is slidably installed in the transmission cavity 8. One end of the second transmission slider that penetrates the transmission cavity 8 is connected to a front telescopic part 7. A compression spring 15 is sleeved on the connecting post 14. One end of the compression spring 15 abuts against the transmission gear 17, and the other end of the compression spring 15 abuts against the top inner wall of the transmission cavity 8.

[0020] With the provided transmission gear 17, first transmission slider 5, and second transmission slider 12, the transmission gear 17 can be vertically moved by pulling up the pull ring 19 and engage with the first transmission slider 5 or the second transmission slider 12 that needs to be adjusted. By turning the pull ring 19, the transmission gear 17 can be rotated, thereby causing the two first transmission sliders 5 to extend and retract synchronously or the second transmission slider 12 to extend and retract, so as to extend and retract the side extension part 6 or the front extension part 7, thereby adjusting the total width or total length of the foot part 3, so that the foot part 3 can adapt to the needs of different users. With the setting of the self-locking block 10 and the self-locking groove 9, it is easy to self-lock and fix the adjusted side extension part 6 or the front extension part 7.

[0021] Specifically, in this embodiment, a rotating block 11 is protruding from the bottom of the transmission gear 17, and a self-locking block 10 is protruding from the bottom of the rotating block 11. A self-locking groove 9 adapted to the self-locking block 10 is opened on the bottom inner wall of the transmission cavity 8. The self-locking groove 9 is formed by several conical grooves arranged at intervals along the circumferential direction, and the self-locking block 10 is formed by several conical protrusions arranged at intervals along the circumferential direction.

[0022] By cooperating with the self-locking block 10, the self-locking block 10 at the bottom of the rotating block 11 is pressed against the self-locking groove 9 when the compression spring 15 keeps the transmission gear 17 pressed against the bottom inner wall of the transmission cavity 8, thereby achieving self-locking fixation of the transmission gear 17.

[0023] Specifically, in this embodiment, both the first transmission slider 5 and the second transmission slider 12 are provided with toothed grooves 13 that mesh with the transmission gear 17, which facilitates the transmission gear 17 to drive the first transmission slider 5 or the second transmission slider 12 to move.

[0024] Specifically, in this embodiment, the inner walls on both sides of the transmission cavity 8 are provided with side sliding holes 4 that communicate with the outside, and the two first transmission sliders 5 are respectively slidably arranged in the two side sliding holes 4.

[0025] The side sliding hole 4 allows the two first transmission sliders 5 to slide along the side sliding hole 4, thus guiding the movement direction of the first transmission sliders 5.

[0026] Specifically, in this embodiment, a front sliding hole 16 communicating with the outside is provided in the transmission cavity 8, and the second transmission slider 12 is slidably arranged in the front sliding hole 16.

[0027] The front sliding hole 16 allows the second transmission slider 12 to slide along the front sliding hole 16, thus guiding the movement direction of the second transmission slider 12.

[0028] Specifically, in this embodiment, the second transmission slider 12 is positioned directly above the two first transmission sliders 5.

[0029] 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 stable prosthetic footplate structure, comprising a heel portion, a foot portion, and a connector, characterized in that: The heel is welded to one side of the foot. The connector is located at the top of the foot and the heel. A transmission cavity is provided inside the foot. A transmission gear is rotatably installed in the transmission cavity. A connecting post is provided at the top of the transmission gear, penetrating the transmission cavity and extending upward to the outside. A limit block is provided at the top of the connecting post, and a pull ring is provided at the top of the limit block. Two first transmission sliders are provided in the transmission cavity. The ends of the two first transmission sliders that are far apart from each other both extend through the transmission cavity to the outside and are connected to a side telescopic part. A second transmission slider is slidably installed in the transmission cavity, perpendicular to the two first transmission sliders. One end of the second transmission slider that penetrates the transmission cavity is connected to a front telescopic part. A compression spring is sleeved on the connecting post. One end of the compression spring abuts against the transmission gear, and the other end of the compression spring abuts against the top inner wall of the transmission cavity.

2. The stable prosthetic footplate structure according to claim 1, characterized in that: The bottom of the transmission gear is provided with a rotating block, the bottom of the rotating block is provided with a self-locking block, and the bottom inner wall of the transmission cavity is provided with a self-locking groove that matches the self-locking block.

3. The stable prosthetic footplate structure according to claim 2, characterized in that: The self-locking groove is formed by several conical grooves arranged at intervals along the circumference, and the self-locking block is formed by several conical protrusions arranged at intervals along the circumference.

4. The stable prosthetic footplate structure according to claim 1, characterized in that: Both the first and second transmission sliders have toothed grooves that mesh with the transmission gears.

5. The stable prosthetic footplate structure according to claim 1, characterized in that: The inner walls on both sides of the transmission cavity are provided with side sliding holes that communicate with the outside, and the two first transmission sliders are respectively slidably arranged in the two side sliding holes.

6. The stable prosthetic footplate structure according to claim 1, characterized in that: The transmission cavity has a front sliding hole that communicates with the outside, and the second transmission slider is slidably arranged in the front sliding hole.

7. A stable prosthetic footplate structure according to claim 6, characterized in that: The second transmission slider is positioned directly above the two first transmission sliders.

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