Elastic heel prosthetic foot
By designing a cushioning device and protective structure for the elastic heel prosthetic foot, and utilizing components such as dampers and springs, the impact force problem when the foot lands is solved, achieving more comfortable and stable support, extending the lifespan of the prosthetic foot, and reducing the risk of falls.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHIJIAZHUANG PERFECT PROSTHETIC MFG CO LTD
- Filing Date
- 2025-05-06
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technologies struggle to provide cushioning when feet land, increasing impact and causing pain and discomfort for users, thus failing to offer comfortable and stable support.
A flexible heel prosthetic foot was designed, which includes a cushioning device and a protective structure. Utilizing components such as dampers, springs, and telescopic rods, it absorbs vibrations and lateral forces through the linkage of a cushioning plate and a sliding rod, providing a soft walking experience. Furthermore, it converts vibration energy through springs and a return spring to achieve a cushioning effect.
It effectively reduces the impact of foot landing, reduces pain and discomfort, provides more comfortable and stable support, extends the lifespan of the prosthetic foot, and avoids the risk of falls.
Smart Images
Figure CN224523347U_ABST
Abstract
Description
Technical Field
[0001] The embodiments disclosed herein relate to the field of prosthetics, and more specifically, to a flexible heel prosthetic foot. Background Technology
[0002] A heel prosthesis is a type of prosthetic design intended to provide support for lost or damaged lower limbs, particularly for the functional recovery of the heel area. The heel is a critical part of the human gait and bears pressure during walking; therefore, designing a prosthesis that can mimic the natural movement of the heel is essential for restoring the user's gait and comfort.
[0003] According to a public disclosure (Publication No.: CN202069723U), an elastic prosthetic foot core includes an upper plate, a lower plate, a connecting structure, and a middle plate located between the upper and lower plates. The upper, middle, and lower plates are all sheet-like and are connected and fixed together by the connecting structure. After being connected and fixed to the middle and lower plates, the upper plate forms two openings, one in front and one behind, with the middle plate. However, the above device, through the cooperation of components such as the upper, middle, and lower plates, is difficult to achieve a cushioning effect, increasing the impact force when the foot lands, increasing the user's pain and discomfort, and making it difficult for the user to feel more comfortable and stable support, thus increasing discomfort. It needs improvement. Utility Model Content
[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide an elastic heel prosthetic foot, which solves the technical problems in related / existing technologies that are difficult to achieve a cushioning effect, increase the impact force when the foot lands, increase the user's pain and discomfort, and make it difficult for the user to feel more comfortable and stable support, thus increasing discomfort.
[0005] According to one aspect, at least one embodiment of this disclosure provides an elastic heel prosthetic foot, including a heel body, a foot plate provided at the bottom of the heel body, a support frame provided at the top of the heel body, a rotating shaft provided on the side of the support frame, and a cushioning structure provided on the side of the support frame. The bottom of the heel body is provided with a cushioning device, which includes a fixed plate fixedly connected to the top of the foot plate. A fixed block is fixedly connected to the top of the fixed plate, a damper is fixedly connected to the top of the fixed block, a positioning block is fixedly connected to the top of the damper, a cushioning plate extends through the side of the positioning block, a slider is slidably connected to the top of the fixed plate, and a sliding rod is fixedly connected to the top of the slider. The cushioning device includes a shock-absorbing structure.
[0006] For example, in at least one embodiment of this disclosure, an elastic heel prosthetic foot is provided, which further includes a positioning plate fixedly connected to the side of a fixed plate, an mounting block fixedly connected to the side of the positioning plate, a telescopic rod fixedly connected to the side of the buffer plate, and a buffer block at the telescopic end of the telescopic rod. Through the linkage of the buffer plate, the telescopic rod, and the buffer block, some unnecessary vibrations and lateral forces can be absorbed when walking, thereby helping to maintain balance and stability when walking and avoiding possible accidental falls.
[0007] The end of the slide bar away from the slider is fixedly connected to the bottom of the buffer plate. The mounting block is located on the movement trajectory of the buffer block. Through the flexible cooperation of components such as the slide bar, slider, and return spring, the prosthetic foot can adapt to different paces and strides, providing a softer and more natural walking experience.
[0008] According to another aspect, at least one embodiment of this disclosure also provides an elastic heel prosthetic foot, including the cushioning device comprising a protective structure, the protective structure comprising a mounting plate, the mounting plate being fixedly connected to the bottom of the heel body, a telescopic column being fixedly connected to the side of the mounting plate, a support block being fixedly connected to the telescopic end of the telescopic column, a support plate being fixedly connected to the side of the foot plate, and a fixing block A being fixedly connected to the side of the support plate.
[0009] For example, in at least one embodiment of this disclosure, an elastic heel prosthetic foot is provided, which further includes a spring fixedly connected to the top of the fixing block. The end of the spring away from the fixing block is fixedly connected to the bottom of the buffer plate. The spring in the design can effectively reduce the direct impact force from the ground and gait, reduce the damage to the prosthetic foot body, and help extend the service life of the prosthetic foot.
[0010] The slider is fixedly connected to a compression spring, and the end of the compression spring away from the slider is fixedly connected to the bottom of the buffer plate. The design of the compression spring helps the slider to automatically reset, reducing manual intervention.
[0011] The fixed block A is located on the movement trajectory of the support block. The initial state of the compression spring is relaxed. When the support block contacts the side of the fixed block A and displacement occurs, the extensibility of the device and the buffering effect of the spring help to provide additional stability and avoid the risk of falling or tripping due to imbalance or excessive impact, which is especially important on uneven ground.
[0012] The spring is initially in a relaxed state. A return spring is fixedly connected to the side of the buffer plate. The end of the return spring away from the buffer plate is fixedly connected to the side of the buffer block. The design of the return spring can make the buffer block automatically reset, thus improving the buffering effect.
[0013] A buffer spring is fixedly connected to the side of the mounting plate. The end of the buffer spring away from the mounting plate is fixedly connected to the side of the support block. The buffer spring effectively absorbs and buffers vibrations, reducing the pressure on the joints of the upper or lower limbs due to the transmission of inappropriate forces, avoiding joint fatigue caused by prostheses, and thus alleviating other health problems.
[0014] The initial state of the reset spring is relaxed, and the initial state of the buffer spring is relaxed. By compressing the reset spring and the buffer spring, the vibration energy is converted into elastic potential energy. The reset spring counteracts the vibration force by generating a reaction force opposite to the vibration direction, thus achieving the buffering effect.
[0015] The beneficial effects of the embodiments disclosed herein are as follows: 1. In this utility model, the downward pressure of the heel body compresses the buffer plate and positioning block, which, in conjunction with the damper, spring, and telescopic rod in the buffer device, achieves the displacement of the buffer plate, which in turn drives the sliding rod to move, and the sliding rod to move the slider. The compression spring at the bottom of the buffer plate is compressed, and the vibration energy is converted into elastic potential energy through the compression of the spring and the compression spring. The spring generates a reaction force opposite to the direction of vibration to counteract the vibration force, thus achieving a buffering effect. This reduces the impact force when the foot lands, reduces the user's pain and discomfort, and allows the user to feel more comfortable and stable support, reducing discomfort.
[0016] 2. In this utility model, the force that drives the telescopic column to move by the displacement of the mounting plate cooperates with the support block, fixed block A and buffer spring in the buffer device to realize the displacement of the support block by the displacement of the telescopic column. When the support block moves to the side of the fixed block A, the arc surface of the support block is squeezed and moves. The buffer spring and telescopic column on the side of the support block are squeezed, which achieves the effect of protecting the heel body and extending the service life of the device. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of an elastic heel prosthetic foot in one embodiment of the present disclosure; Figure 2 for Figure 1 A three-dimensional side view structural schematic diagram of the central fixing plate; Figure 3 This is a schematic diagram of the structure of an elastic heel prosthetic foot in yet another embodiment of the present disclosure; Figure 4 for Figure 3 A magnified three-dimensional structural diagram of the buffer plate. Figure 5 for Figure 4 A magnified three-dimensional structural diagram of the spring in the middle.
[0019] In the diagram: 101, heel body; 102, foot plate; 103, support frame; 104, rotating shaft; 105, buffer structure; 2, buffer device; 201, fixing plate; 202, fixing block; 203, damper; 204, spring; 205, positioning block; 206, buffer plate; 207, telescopic rod; 208, return spring; 209, buffer block; 210, positioning plate; 211, mounting block; 212, support plate; 213, fixing block A; 214, mounting plate; 215, telescopic column; 216, buffer spring; 217, support block; 218, slider; 219, sliding rod; 220, compression spring. Detailed Implementation
[0020] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.
[0021] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0022] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0023] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0024] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.
[0025] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0026] like Figures 1-5 As shown, it illustrates an elastic heel prosthetic foot in one embodiment of the present disclosure, including a heel body 101, a foot plate 102 provided at the bottom of the heel body 101, a support frame 103 provided at the top of the heel body 101, a rotating shaft 104 provided on the side of the support frame 103, and a cushioning structure 105 provided on the side of the support frame 103. A cushioning device 2 is provided at the bottom of the heel body 101. The cushioning device 2 includes a fixing plate 201, which is fixedly connected to the top of the foot plate 102. A fixing block 202 is fixedly connected to the top of the fixing plate 201. A damper 203 is fixedly connected to the top of the fixing block 202. A positioning block 205 is fixedly connected to the top of the damper 203. A cushioning plate 206 passes through the side of the positioning block 205. A slider 218 is slidably connected to the top of the fixing plate 201. A slider rod 219 is fixedly connected to the top of the slider 218. The cushioning device 2 includes a shock-absorbing structure.
[0027] In some examples, the shock-absorbing structure includes a positioning plate 210 fixedly connected to the side of a fixed plate 201, an mounting block 211 fixedly connected to the side of the positioning plate 210, a telescopic rod 207 fixedly connected to the side of a buffer plate 206, and a buffer block 209 at the telescopic end of the telescopic rod 207. Through the linkage of the buffer plate 206, the telescopic rod 207 and the buffer block 209, some unnecessary vibrations and lateral forces can be absorbed when walking, thereby helping to maintain balance and stability when walking and avoiding possible accidental falls.
[0028] The end of the slide bar 219 away from the slider 218 is fixedly connected to the bottom of the buffer plate 206. The mounting block 211 is located on the movement trajectory of the buffer block 209. Through the flexible cooperation of components such as the slide bar 219, the slider 218 and the return spring 208, the prosthetic foot can adapt to different paces and steps, providing a softer and more natural walking experience.
[0029] For example, as shown in the figure, when the device is in use, the downward pressure of the heel body 101 when the prosthetic foot is walking will squeeze the buffer plate 206 and the positioning block 205. The buffer plate 206 drives the positioning block 205 to move, and the spring 204 at the bottom of the buffer plate 206 is compressed. Then, the displacement of the buffer plate 206 drives the slide rod 219 to move, and the displacement of the slide rod 219 drives the slider 218 to move. The compression spring 220 at the bottom of the buffer plate 206 is compressed. The compression of the spring 204 and the compression spring 220 converts the vibration energy into elastic potential energy. The spring 204 counteracts the vibration force by generating a reaction force opposite to the vibration direction, thus achieving the buffering effect. The displacement of the buffer plate 206 drives the telescopic rod 207 to move, and the displacement of the telescopic rod 207 drives the buffer block 209 to move. When the buffer block 209 moves to the side of the mounting block 211, the arc surface of the buffer block 209 is compressed and moved. The return spring 208 and the telescopic rod 207 on the side of the buffer block 209 are compressed, thus achieving the buffering effect.
[0030] like Figures 1-5 As shown, it illustrates an elastic heel prosthetic foot according to another embodiment of the present disclosure, including a cushioning device 2 and a protective structure. The protective structure includes a mounting plate 214, which is fixedly connected to the bottom of the heel body 101. A telescopic column 215 is fixedly connected to the side of the mounting plate 214, and a support block 217 is fixedly connected to the telescopic end of the telescopic column 215. A support plate 212 is fixedly connected to the side of the foot plate 102, and a fixing block A213 is fixedly connected to the side of the support plate 212. In some examples, a spring 204 is fixedly connected to the top of the fixing block 202, and the end of the spring 204 away from the fixing block 202 is fixedly connected to the bottom of the buffer plate 206. The spring 204 in the design can effectively reduce the direct impact force from the ground and gait, reduce the damage to the prosthetic foot body, and help extend the service life of the prosthetic foot.
[0031] The slider 218 is fixedly connected to a compression spring 220. The end of the compression spring 220 away from the slider 218 is fixedly connected to the bottom of the buffer plate 206. The design of the compression spring 220 helps the slider 219 to automatically reset, reducing manual intervention.
[0032] The fixed block A213 is located on the movement trajectory of the support block 217. The initial state of the compression spring 220 is relaxed. When the support block 217 contacts the side of the fixed block A213 and displacement occurs, the telescoping of the device and the buffering effect of the spring 204 help to provide additional stability and avoid the risk of falling or tripping due to imbalance or excessive impact, which is especially important on uneven ground.
[0033] The initial state of spring 204 is relaxed. A return spring 208 is fixedly connected to the side of the buffer plate 206. The end of the return spring 208 away from the buffer plate 206 is fixedly connected to the side of the buffer block 209. The design of the return spring 208 can make the buffer block 209 automatically reset, thus improving the buffering effect.
[0034] A buffer spring 216 is fixedly connected to the side of the mounting plate 214. The end of the buffer spring 216 away from the mounting plate 214 is fixedly connected to the side of the support block 217. The buffer spring 216 effectively absorbs and buffers vibrations, reducing the pressure on the joints of the upper or lower limbs due to the transmission of inappropriate forces, avoiding joint fatigue caused by prostheses, and thus alleviating other health problems.
[0035] The initial state of the return spring 208 is relaxed, and the initial state of the buffer spring 216 is relaxed. By compressing the return spring 208 and the buffer spring 216, the vibration energy is converted into elastic potential energy. The return spring 208 counteracts the vibration force by generating a reaction force opposite to the vibration direction, thus achieving the buffering effect.
[0036] For example, as shown in the figure, when the heel body 101 moves downward, it will cause the mounting plate 214 to move downward. The displacement of the mounting plate 214 will cause the telescopic column 215 to move, and the displacement of the telescopic column 215 will cause the support block 217 to move. When the support block 217 moves to the side of the fixed block A213, the arc surface of the support block 217 will be compressed and displaced. The buffer spring 216 and the telescopic column 215 on the side of the support block 217 will be compressed, thus achieving the buffering effect.
[0037] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.
Claims
1. A flexible heel prosthetic foot, characterized in that, Includes a heel body (101), a foot plate (102) is provided at the bottom of the heel body (101), a support frame (103) is provided at the top of the heel body (101), a rotating shaft (104) is provided on the side of the support frame (103), and a buffer structure (105) is provided on the side of the support frame (103). The bottom of the heel body (101) is provided with a cushioning device (2). The cushioning device (2) includes a fixing plate (201), which is fixedly connected to the top of the foot plate (102). A fixing block (202) is fixedly connected to the top of the fixing plate (201). A damper (203) is fixedly connected to the top of the fixing block (202). A positioning block (205) is fixedly connected to the top of the damper (203). A cushioning plate (206) passes through the side of the positioning block (205). A slider (218) is slidably connected to the top of the fixing plate (201). A sliding rod (219) is fixedly connected to the top of the slider (218). The cushioning device (2) includes a shock-absorbing structure.
2. The elastic heel prosthetic foot according to claim 1, characterized in that, The shock absorption structure includes a positioning plate (210) fixedly connected to the side of a fixed plate (201), an installation block (211) fixedly connected to the side of the positioning plate (210), a telescopic rod (207) fixedly connected to the side of the buffer plate (206), and a buffer block (209) at the telescopic end of the telescopic rod (207).
3. The elastic heel prosthetic foot according to claim 2, characterized in that, The end of the slide bar (219) away from the slider (218) is fixedly connected to the bottom of the buffer plate (206), and the mounting block (211) is located on the movement trajectory of the buffer block (209).
4. The elastic heel prosthetic foot according to claim 3, characterized in that, The buffer device (2) includes a protective structure, which includes a mounting plate (214). The mounting plate (214) is fixedly connected to the bottom of the heel body (101). A telescopic column (215) is fixedly connected to the side of the mounting plate (214). A support block (217) is fixedly connected to the telescopic end of the telescopic column (215). A support plate (212) is fixedly connected to the side of the foot plate (102). A fixing block A (213) is fixedly connected to the side of the support plate (212).
5. The elastic heel prosthetic foot according to claim 4, characterized in that, A spring (204) is fixedly connected to the top of the fixing block (202), and the end of the spring (204) away from the fixing block (202) is fixedly connected to the bottom of the buffer plate (206).
6. The elastic heel prosthetic foot according to claim 5, characterized in that, The slider (218) is fixedly connected to a compression spring (220), and the end of the compression spring (220) away from the slider (218) is fixedly connected to the bottom of the buffer plate (206).
7. The elastic heel prosthetic foot according to claim 6, characterized in that, The fixed block A (213) is located on the movement trajectory of the support block (217), and the initial state of the compression spring (220) is relaxed.
8. The elastic heel prosthetic foot according to claim 7, characterized in that, The initial state of the spring (204) is relaxed. A return spring (208) is fixedly connected to the side of the buffer plate (206). The end of the return spring (208) away from the buffer plate (206) is fixedly connected to the side of the buffer block (209).
9. The elastic heel prosthetic foot according to claim 8, characterized in that, A buffer spring (216) is fixedly connected to the side of the mounting plate (214), and the end of the buffer spring (216) away from the mounting plate (214) is fixedly connected to the side of the support block (217).
10. The elastic heel prosthetic foot according to claim 9, characterized in that, The initial state of the reset spring (208) is relaxed, and the initial state of the buffer spring (216) is relaxed.