A split foot prosthesis with easy drainage

Abstract

The utility model discloses a split type artificial foot of easy drainage in the technical field of artificial limb, the device has increased the inner bolster plate of artificial foot cover and carbon fiber, and the artificial foot cover can be tightly clamped with the inner bolster plate, forms integral force structure, and increases various different clamping structures in the artificial foot cover, makes the stable assembly of artificial foot cover and inner bolster plate, and the inner bolster plate of carbon fiber is sheet structure, has higher structural strength and small weight, is convenient for assembly, and the sheet arc structure still has deformation buffer action from taking, can effectively reduce the impact force of ground to leg, and the ring groove of drainage is arranged in the artificial foot cover, and the matched flow guide groove and drain hole, thereby can quickly drain the accumulated water of the accidental entry inside the artificial foot cover, effectively links and reduces the mildew and stink condition of the damp inside the artificial foot cover, and because of being equipped with the flow guide channel, can not disassemble the device, also can conveniently dry the inside space of artificial foot cover.

Description

Technical Field

[0001] This utility model relates to the field of prosthetics technology, and in particular to a detachable prosthetic foot that is easy to drain. Background Technology

[0002] A prosthesis is an artificial prosthesis specially designed, manufactured, and fitted using engineering techniques to compensate for amputees or those with incomplete limb loss; it is also known as a "surgery limb." 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. It is suitable for amputees due to illness, traffic accidents, workplace injuries, sports injuries, and other causes.

[0003] The prosthetic foot in a prosthesis needs to use a rigid structure to provide strong support for the user. Therefore, during manufacturing, it is made to simulate the support and force-bearing structure of the foot to facilitate patient movement and cushion the impact force from the ground during movement. Thus, some prosthetic feet are made into a flat support, or even with springs for cushioning; others are made directly into a wooden foot model to provide support for the patient and make its support more stable. These are all the skeleton of the prosthesis.

[0004] For aesthetic purposes, some disabled people use prosthetic sleeves, which are protective covers that make the prosthesis feel and shape more realistic. These sleeves provide both protection and aesthetics to the frame and are a common prosthesis manufacturing technique. These prosthetic sleeves are usually made of polyurethane material and are worn over the supporting structure of the prosthetic frame on the foot.

[0005] Currently, there are gaps between the outer cover and the internal support structure of prostheses. When walking or engaging in activities outdoors, water may splash onto the prosthetic foot. This seepage can cause the wooden structure inside the prosthesis to mold and swell, while the metal parts will become damp and rust. Even carbon fiber structures, although less prone to rust, are susceptible to bacterial growth and mold growth due to dampness inside the prosthetic cover. Moreover, these prosthetic feet are generally fixed structures, making drying difficult. Some are also modular structures, requiring disassembly for drying. Not only is disassembly difficult, but internal sealing and drying are also extremely challenging, increasing the difficulty of prosthetic maintenance. This is especially true after using the prosthesis in the rain, as it is difficult to dry, causing prostheses wearers to avoid going out in the rain and bringing inconvenience to their lives.

[0006] Based on this, this utility model designs a detachable prosthetic foot that is easy to drain, in order to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide a detachable prosthetic foot that is easy to drain. This device adds a prosthetic foot sleeve and a carbon fiber inner support plate. The prosthetic foot sleeve can be tightly fitted with the inner support plate to form an integral force-bearing structure. In addition, various different locking structures are added inside the prosthetic foot sleeve to ensure stable assembly between the prosthetic foot sleeve and the inner support plate. The carbon fiber inner support plate has a sheet-like structure, which has higher structural strength and lower weight. While facilitating assembly, its sheet-like arc-shaped structure also has a deformation buffering effect, which can effectively reduce the impact force of the ground on the legs. At the same time, the prosthetic foot sleeve is equipped with a drainage ring groove, as well as matching guide channels and drainage holes, so that water that accidentally enters the prosthetic foot sleeve can be quickly drained, effectively preventing and reducing the mold and odor caused by dampness inside the prosthetic foot sleeve. Moreover, because of the guide channel, the internal space of the prosthetic foot sleeve can be easily dried without disassembling the device.

[0008] This utility model is implemented as follows: a detachable, easily drainable prosthetic foot, comprising:

[0009] Fake foot covers, drain trough, inner support plate, and fasteners;

[0010] The prosthetic foot cover is a hollow, closed foot-shaped sleeve. An installation hole is provided at the connection between the top of the prosthetic foot cover and the ankle. The installation hole is a downward-opening round hole. The inner cavity of the prosthetic foot cover is connected to the outside through the installation hole. An assembly groove is also provided on the top rear side wall of the installation hole. The assembly groove is a long strip-shaped groove that is vertically opened in the front-back direction. The assembly groove passes through both the rear side wall and the top end face of the installation hole.

[0011] The clip is a snap-fit, which can be detachably snapped into the mounting groove of the mounting hole. The front end of the clip is also equipped with a locating wheel via a rotating shaft. The locating wheel can rotate and is blocked on the rear inner wall of the mounting hole.

[0012] The inner cavity of the prosthetic foot cover also features an upward-protruding retaining ridge at the forefoot area, which is a long strip structure arranged in the front-back direction; the inner cavity of the prosthetic foot cover also features an upward-protruding elevating pad, which is a foot-shaped sheet structure that protrudes upwards.

[0013] The bottom edge of the inner cavity of the fake foot cover is also recessed to form an annular groove. The annular groove is a complete annular groove surrounding the outside of the shim. The highest opening of the annular groove is lower than the height of the shim.

[0014] The drainage trough is a sunken groove with an opening at the top. The drainage trough is located at the center of the raised plate, and the bottom of the drainage trough is also at the height above the annular groove.

[0015] The drainage trough is also provided with a flow guide channel along its edge, and the drainage trough is connected to the annular trough through the flow guide channel;

[0016] The prosthetic foot cover also has a drainage hole on the outside, which penetrates the outer wall of the prosthetic foot cover. The annular groove is connected to the inner end of the drainage hole. The annular groove is connected to the outside of the prosthetic foot cover through the drainage hole, and the inner end of the drainage hole is higher than the outer end.

[0017] The inner support plate is a curved sheet structure that is lower in the front and higher in the back. The inner support plate can be detachably and tightly snapped into the inside of the prosthetic foot cover. The forefoot of the inner support plate has a locking groove along the front-to-back direction. The locking groove is open on the front side of the inner support plate and is engaged with the edge of the locking plate. The bottom of the inner support plate is stably fitted and abutted against the padding piece.

[0018] Furthermore, the pad is a raised platform in the shape of a foot sole, the pad is a curved arc surface that is lower in the front and higher in the back, and two positioning grooves are recessed downward at the heel of the pad, the positioning grooves being countersunk holes;

[0019] A connector is also installed at the top of the heel of the inner support plate, and two locking pins are also provided at the bottom of the heel of the inner support plate. The connector is locked to the top of the heel of the inner support plate by the two locking pins. The two locking pins are positioned one-to-one and sealed against the two positioning grooves. The positioning grooves and locking pins have the same shape, and the positioning grooves and locking pins are clearance fit.

[0020] Furthermore, it also includes a rear retaining edge and a front retaining edge, both of which are fixed directly above the annular groove;

[0021] The front gusset is a horseshoe-shaped plate structure. The concave side of the front gusset is fixed to the toe of the fake foot cover. The front gusset blocks the toe of the inner support plate directly above it.

[0022] The rear gusset is a U-shaped protrusion, and the concave side of the rear gusset is arranged in a ring around the heel of the fake foot cover. The rear gusset blocks the area directly above the heel of the inner support plate.

[0023] Furthermore, the rear retaining edge does not interfere with the connecting piece;

[0024] Both the rear and front gussets are integrally formed with the dummy foot covers;

[0025] The prosthetic foot cover is a flexible polyurethane prosthetic foot.

[0026] Furthermore, at least one guide channel is connected to each of the left and right sides of the drain trough, and the end of the guide channel connected to the drain trough is higher than the end connected to the annular channel.

[0027] The outer end of the guide channel is obliquely arranged towards the drain hole;

[0028] At least one drainage hole is provided on each of the inner and outer sides of the prosthetic foot cover. The annular groove is an inclined groove at the heel that is higher than the forefoot. The drainage hole is connected to the lowest point of the annular groove.

[0029] The annular groove is foot-shaped.

[0030] Furthermore, the inner support plate is an elastic multi-layer carbon fiber plate, and the inner support plate is a curved thin sheet that is lower in the front and higher in the back; the protrusion height of the clamping plate edge is greater than the thickness of the inner support plate.

[0031] The slot and the edge of the card plate are in clearance fit, and the clearance does not exceed 0.5mm.

[0032] Furthermore, the clamp is an I-shaped spring steel sheet;

[0033] The card has a locking groove with an outer opening on each of its left and right sides. The locking grooves on the left and right sides of the card are respectively engaged with the left and right sides of the assembly groove. The locking grooves are clamped to the inner and outer side walls of the mounting hole.

[0034] The rotating shaft of the caliper is set horizontally in the left-right direction.

[0035] Furthermore, the mounting groove is located above the rear retaining edge, and the mounting groove does not contact the rear retaining edge.

[0036] The beneficial effects of this utility model are: 1. The prosthetic foot cover of this utility model is a complete prosthetic limb cover. The interior is also equipped with a rear and front retaining plate, which can stably lock the inner support plate in the front-back direction. The interior of the prosthetic foot cover is also equipped with retaining plate ridges and positioning grooves, which can be positioned and locked with the retaining grooves and locking pins of the inner support plate. This allows the prosthetic foot cover and the inner support plate to be effectively limited in the left and right directions, so that the prosthetic foot cover can be stably assembled with the inner support plate. After wearing, it can provide stable support force and can be easily disassembled and replaced. In particular, the service life of the inner support plate is much longer than that of the prosthetic foot cover, and this device can be easily replaced.

[0037] 2. The prosthetic foot sleeve of this device has an added ring groove inside. The inner side of the ring groove is connected to the guide groove and the drain groove. The outer side is also connected to the outside of the prosthetic foot sleeve through the drain groove. This can easily drain the water accumulated in the inner cavity of the prosthetic foot sleeve, effectively preventing water accumulation inside the prosthetic foot sleeve. The guide groove, the drain groove and the ring groove can also form a channel for air drying. When maintaining the prosthesis after use, it can be dried directly by air drying more quickly and conveniently, avoiding the situation where the metal connectors inside the prosthetic foot sleeve rust due to moisture. It can also improve or eliminate the situation of odor caused by moisture.

[0038] 3. The split structure of this device is assembled by positioning and clamping. It also has an assembly slot that can be opened and enlarged to facilitate the installation of the inner support plate. After installation, a clamp can be installed to lock the assembly slot. At the same time, a chuck is set on the inside to limit the inner support plate. The chuck can also form a rolling support for the connecting parts, so that the dummy foot cover will not be squeezed and damaged when the dummy foot cover moves due to force. Attached Figure Description

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0040] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0041] Figure 2 This is a schematic diagram of the structure of the prosthetic foot cover of this utility model;

[0042] Figure 3 This is a schematic diagram of the internal structure of the spurious foot cover of this utility model cut open;

[0043] Figure 4 This is a schematic diagram of the internal structure of the assembly of the dummy foot cover and the inner support plate of this utility model.

[0044] Figure 5 This is a schematic diagram of the top structure of the inner support plate of this utility model;

[0045] Figure 6 This is a schematic diagram of the bottom structure of the inner support plate of this utility model;

[0046] Figure 7 This is a schematic diagram of the card and dummy foot cover of this utility model;

[0047] Figure 8 This is a schematic diagram of the internal support plate and the front clamping edge of this utility model in their clamping state.

[0048] Figure 9 This is a top view of the card structure of this utility model;

[0049] Figure 10 This is a top view of the installation state of the card and assembly slot of this utility model;

[0050] Figure 11 This is a schematic diagram of the side structure of the inner support plate of this utility model.

[0051] The attached diagram lists the components represented by each number as follows:

[0052] 1-Dummy foot cover, 11-Assembly groove, 12-Positioning groove, 13-Clamping plate edge, 14-Elevating piece, 15-Mounting hole, 2-Drain groove, 21-Guide groove, 22-Ring groove, 23-Drain hole, 3-Inner support plate, 31-Clamping groove, 32-Locking nail, 33-Connector, 4-Clamping piece, 41-Locking groove, 42-Clamping wheel, 5-Rear clamping edge, 51-Front clamping edge. Detailed Implementation

[0053] Please see Figures 1 to 11 As shown, this utility model provides a detachable prosthetic foot that is easy to drain. To better understand the above technical solution, the following will describe the above technical solution in detail with reference to the accompanying drawings and specific embodiments.

[0054] In a specific embodiment of the technical solution of this utility model:

[0055] Includes 1. fake foot cover, 2. drain trough, 3. inner support plate, and 4. clips;

[0056] The prosthetic foot cover 1 is a hollow, closed foot-shaped sleeve. The front end of the prosthetic foot cover 1 is the toe and the rear end is the heel. An installation hole 15 is opened at the connection between the top of the prosthetic foot cover 1 and the ankle. The installation hole 15 is a downward-opening round hole. The inner cavity of the prosthetic foot cover 1 communicates with the outside through the installation hole 15. An assembly groove 11 is also opened on the rear side wall of the top of the installation hole 15. The assembly groove 11 is a long strip-shaped groove that is vertically opened in the front-back direction. The assembly groove 11 passes through the rear side wall and the top end face of the installation hole 15.

[0057] The clip 4 is a snap-fit, which can be detachably snapped into the mounting groove 11 of the mounting hole 15. The front end of the clip 4 is also equipped with a locating wheel 42 via a rotating shaft. The locating wheel 42 can rotate and is blocked on the rear inner wall of the mounting hole 15.

[0058] Card 4 is a thin sheet made of I-beam shaped spring steel;

[0059] A locking groove 41 with an outer opening is opened on each of the left and right sides of the clip 4. The locking grooves 41 on the left and right sides of the clip 4 are respectively locked onto the left and right sides of the assembly groove 11, and the locking grooves 41 are clamped on the inner and outer side walls of the mounting hole 15.

[0060] The pivot of the chuck 42 is horizontally arranged in the left-right direction. The chuck 42 can rotate and abut against the connector 33, preventing the connector 33, which is made of stainless steel or aluminum alloy, from puncturing the dummy foot 1 when squeezed. The mounting groove 11 is closed by the clamp 4, and the connector 33 is limited by the chuck 42.

[0061] The inner bottom of the prosthetic foot cover 1 has an upward-protruding locking plate 13 at the forefoot area. The locking plate 13 is a long strip structure arranged in the front-back direction. The inner bottom of the prosthetic foot cover 1 also has an upward-protruding pad 14 at the foot. The pad 14 is an upward-protruding foot-shaped sheet structure.

[0062] The raised plate 14 is a raised platform in the shape of the sole of a foot. The raised plate 14 is a curved arc surface that is lower in the front and higher in the back. Two positioning grooves 12 are recessed downward at the heel of the raised plate 14. The positioning grooves 12 are countersunk holes.

[0063] The bottom edge of the inner cavity of the fake foot cover 1 is recessed and has an annular groove 22. The annular groove 22 is a complete annular groove surrounding the outside of the shim plate 14. The annular groove 22 acts as a water guide, guiding water from the high place to the lowest place, so that the accumulated water enters the drain hole 23 along the annular groove 22 and is discharged outside the fake foot cover 1. The highest opening of the annular groove 22 is lower than the height of the shim plate 14.

[0064] The water trough 2 is a recessed groove with an open top. The water trough 2 is located at the center of the shim plate 14, which is the highest point of the bottom of the entire inner cavity of the fake foot cover 1, that is, the center of the foot of the shim plate 14. The bottom of the water trough 2 is also located above the height of the annular groove 22. A guide groove 21 is also provided on the edge of the water trough 2, and the water trough 2 is connected to the annular groove 22 through the guide groove 21.

[0065] The exterior of the prosthetic foot cover 1 is also provided with a drainage hole 23. The drainage hole 23 penetrates the outer wall of the prosthetic foot cover 1. The annular groove 22 is connected to the inner end of the drainage hole 23. The annular groove 22 is connected to the exterior of the prosthetic foot cover 1 through the drainage hole 23. The inner end of the drainage hole 23 is higher than the outer end.

[0066] At least one guide channel 21 is connected to each of the left and right sides of the drain trough 2, and the end of the guide channel 21 connected to the drain trough 2 is higher than the end connected to the annular channel 22.

[0067] The outer end of the guide channel 21 is inclined towards the drain hole 23, that is, the outer end is inclined forward, which facilitates the smooth discharge of water and plays the role of guiding the flow, so that the accumulated water can flow down and be discharged away.

[0068] At least one drainage hole 23 is provided on the inner and outer sides of the prosthetic foot cover 1. The annular groove 22 is an inclined groove at the heel that is higher than the forefoot. The drainage hole 23 is connected to the lowest point of the annular groove 22.

[0069] The annular groove 22 is foot-shaped.

[0070] The inner support plate 3 is a curved sheet structure with a lower front and a higher back. The inner support plate 3 can be detached and tightly fitted inside the prosthetic foot cover 1. A locking groove 31 is opened at the front of the inner support plate 3 along the front-back direction. The locking groove 31 is open on the front side of the inner support plate 3. The locking groove 31 is engaged with the locking plate edge 13. The bottom of the inner support plate 3 is stably fitted and abutted against the pad 14.

[0071] A connector 33 is also installed at the top of the heel of the inner support plate 3, and two locking pins 32 are also provided at the bottom of the heel of the inner support plate 3. The connector 33 is locked to the top of the heel of the inner support plate 3 by the two locking pins 32. The two locking pins 32 are positioned one-to-one and sealed against the two positioning grooves 12. The positioning grooves 12 and the locking pins 32 have the same shape, and the positioning grooves 12 and the locking pins 32 are in clearance fit, with a gap not exceeding 0.5mm, to ensure easy assembly and more stable wearing after snapping. By locking the position of the positioning grooves 12 and the locking pins 32, the inner support plate 3 can be restricted from moving left and right, ensuring that the inner support plate 3 maintains a stable position in the left and right direction when a person walks, thus providing a positioning function.

[0072] The inner support plate 3 is an elastic multi-layer carbon fiber plate, and the inner support plate 3 is a curved thin sheet with a lower front and a higher back; the protrusion height of the card plate edge 13 is greater than the thickness of the inner support plate 3.

[0073] The locking groove 31 and the locking plate edge 13 are in clearance fit, and the clearance does not exceed 0.5mm. The locking groove 31 and the locking plate edge 13 position the toe of the inner support plate 3, so that the toe of the inner support plate 3 cannot move left or right, providing stable support for the wearer of this device. The assembly groove 11 is located above the rear locking edge 5. The assembly groove 11 does not contact the rear locking edge 5, so that the rear locking edge 5 remains intact, which means that the rear locking edge 5 locks and limits the inner support plate 3.

[0074] It also includes a rear retaining 5 and a front retaining 51, both of which are fixed directly above the annular groove 22;

[0075] The front gusset 51 is a horseshoe-shaped plate structure. The concave side of the front gusset 51 is fixed to the toe of the fake foot cover 1. The front gusset 51 blocks the toe of the inner support plate 3 directly above it.

[0076] The rear gusset 5 is a U-shaped protrusion. The concave side of the rear gusset 5 is arranged in a ring around the heel of the fake foot cover 1. The rear gusset 5 blocks the area directly above the heel of the inner support plate 3.

[0077] Furthermore, the rear retaining lip 5 does not interfere with the connecting piece 33;

[0078] Both the rear camber 5 and the front camber 51 are integrally formed with the false foot cover 1;

[0079] Prosthetic foot cover 1 is made of flexible polyurethane. This material is currently the best material for making prosthetic foot covers. It is flexible, elastic, and skin-friendly. The disadvantage is that its service life is much shorter than other accessories, so it needs to be replaced after it ages.

[0080] It should be noted that:

[0081] 1. Current prosthetic feet are generally assembled into a fixed structure and are usually not disassembled after assembly. Connectors are a common device in every prosthetic foot, used to assemble with the lower leg or other accessories. However, if the leg is also a prosthesis, the prosthetic leg needs to be disassembled for rest, while the prosthetic foot is not disassembled and is usually locked to the prosthetic leg. This structure makes maintenance more inconvenient. The inner support plate 3 and the prosthetic foot sleeve 1 of this device can be easily disassembled, making replacement and disassembly maintenance more convenient. At the same time, the locking plate ridge 13 and the locking groove 31 provide limiting, and the rear locking eave 5 and the front locking eave 51 are added for front and rear limiting and height limiting, so that the inner support plate 3 is installed in an accurate position and the limiting is stable. It is convenient to disassemble and assemble without affecting the daily wearing of the entire prosthesis, making it convenient to use.

[0082] 2. The artificial foot cover 1 has a raised pad 14 inside, which can create a height difference between the inner support plate 3 and the water inside, making it difficult for the water to disengage from the connector 33. The inner support plate 3 is made of carbon fiber material and will not rust or corrode. The artificial foot cover 1 has an annular groove 22 inside. The annular groove 22, the guide groove 21, and the drain hole 23 can guide and drain the water flowing in from the mounting hole 15, so that the inner cavity of the artificial foot cover 1 cannot accumulate water and can be smoothly discharged along the drain hole 32. Moreover, through these water flow channels, it can also be dried by blowing air. When the blower is pointed at the mounting hole 15, the strong airflow can also blow out the residual water along the drain hole 32, effectively preventing water droplets from remaining inside the artificial foot cover 1. In addition, hot air drying can ensure that the inside of the artificial foot cover 1 is dry, making it difficult for bacteria to grow inside, effectively preventing the artificial foot cover 1 from smelling bad due to bacterial growth.

[0083] 3. While prostheses generally use rigid structures, carbon fiber plates are now also used as foot support structures. This material has stronger elastic deformation capabilities, resulting in better energy storage and effectively improving gait smoothness and naturalness, meeting the daily walking needs of patients. It also enhances structural strength and durability, achieving a balance between lightweight, high strength, and high elasticity. Crucially, this material does not rust, has a long service life, and is relatively easy to maintain. The multi-layered carbon fiber plate structure has a certain degree of deformation and bending capability, allowing it to bend and store energy. This enables the device to buffer the impact energy generated during activity, reducing the impact force on the legs and also cushioning the ground reaction force.

[0084] In use, the inner support plate 3 of this device is fitted onto the top of the padding plate 14 inside the dummy foot cover 1, and they fit together for support. The bottom of the dummy foot cover 1 provides cushioning, and the inner support plate 3 provides higher strength cushioning, effectively alleviating the reaction force generated by greater intensity of movement.

[0085] During assembly, first pull the clip 4 upward to expose the assembly groove 11, then pry the assembly groove 11 open to the left and right sides to enlarge the opening of the mounting hole 15 at the heel of the dummy foot cover 1, and then the inner support plate 3 can be easily inserted forward into the dummy foot cover 1.

[0086] The slot 31 is inserted into the left and right sides of the card plate edge 13, and the inner support plate 3 is inserted under the front card edge 51 and the inner support plate 3 is locked on the top of the pad 14.

[0087] Next, insert the rear end of the inner support plate 3 under the rear lip 5, and align the locking pin 32 in the positioning groove 12 to ensure that the inner support plate 3 is in the correct position.

[0088] The connector 33 faces upward at the mounting hole 15 for easy connection with the leg structure. Then, the clamp 4 is clamped into the assembly groove 11 on the rear side of the mounting hole 15, and the clamping wheel 42 extends out of the mounting hole 15 to block the connector 33, completing the installation.

[0089] When water enters the interior of the dummy foot cover 1, it flows down the connector 33 into the mounting hole 15. The water continues to flow downwards, along the higher parts. Most of the water flows along the four edges into the annular groove 22, while the water remaining at the higher parts flows down the bottom of the inner support plate 3 into the lower water tank 2. At the same time, the water flows along the guide groove 21 to the annular groove 22. The lowest point of the annular groove 22 is connected to the drain hole 23, and the accumulated water flows out of the exterior of the dummy foot cover 1 through the drain hole 23.

[0090] The drying operation for the prosthetic foot cover 1 involves disassembling the inner support plate 3 and wiping it dry.

[0091] Next, use a hair dryer to aim at the mounting hole 15. The hair dryer blows hot air along the mounting hole 15, filling the fake foot cover 1 with hot air and blowing it out through the drain hole 23. This also drains all the water droplets attached to the inner wall of the fake foot cover 1 and dries the fake foot cover 1, keeping it dry and preventing bacteria from growing and the fake foot from smelling bad.

[0092] The interior of this device refers to the inner cavity of the prosthetic foot sleeve 1. The front end refers to the toe end, the rear end refers to the heel side, and the left and right directions refer to the left and right directions of the human body. The prosthetic foot can be either the left or right foot, with the same shape and structure as this device, only the directions are reversed to make them mirror images of each other. The prosthesis needs to be customized according to the human body structure. The forefoot of this device refers to the part of the foot between the arch and the toes.

[0093] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A detachable prosthetic foot that facilitates drainage, characterized in that, include: False foot cover (1), water tank (2), inner support plate (3) and fastener (4); The prosthetic foot sleeve (1) is a hollow, closed foot-shaped sleeve. An installation hole (15) is opened at the connection between the top of the prosthetic foot sleeve (1) and the ankle. The installation hole (15) is a downward-opening round hole. The inner cavity of the prosthetic foot sleeve (1) is connected to the outside through the installation hole (15). An assembly groove (11) is also opened on the rear side wall of the top of the installation hole (15). The assembly groove (11) is a long strip-shaped groove that is vertically opened in the front-back direction. The assembly groove (11) passes through the rear side wall and the top end face of the installation hole (15). The clip (4) is a snap fastener. The clip (4) can be detachably snapped into the mounting groove (11) of the mounting hole (15). The front end of the clip (4) is also equipped with a cam (42) via a rotating shaft. The cam (42) can rotate and block the rear inner wall of the mounting hole (15). The inner cavity of the prosthetic foot cover (1) is further provided with a card plate ridge (13) protruding upward at the forefoot. The card plate ridge (13) is a long strip structure arranged in the front-back direction. The inner cavity of the prosthetic foot cover (1) is further provided with a raised pad (14) protruding upward at the bottom. The raised pad (14) is a foot-shaped sheet structure that protrudes upward. The bottom edge of the inner cavity of the fake foot cover (1) is recessed downward to form an annular groove (22). The annular groove (22) is a complete annular groove surrounding the outside of the pad (14). The highest opening of the annular groove (22) is lower than the height of the pad (14). The drainage trough (2) is a sunken groove with an opening at the top. The drainage trough (2) is located at the center of the raised plate (14), and the bottom of the drainage trough (2) is also located at the height above the annular groove (22). The drainage trough (2) is also provided with a guide channel (21) along its edge, and the drainage trough (2) is connected to the annular groove (22) through the guide channel (21); The prosthetic foot cover (1) also has a drainage hole (23) on its outside. The drainage hole (23) penetrates the outer wall of the prosthetic foot cover (1). The annular groove (22) is connected to the inner end of the drainage hole (23). The annular groove (22) is connected to the outside of the prosthetic foot cover (1) through the drainage hole (23). The inner end of the drainage hole (23) is higher than the outer end. The inner support plate (3) is a curved sheet structure with a lower front and a higher back. The inner support plate (3) is detachably and tightly fitted inside the fake foot cover (1). The inner support plate (3) has a slot (31) at the front of the foot along the front-back direction. The slot (31) is open on the front side of the inner support plate (3). The slot (31) is engaged with the edge of the card plate (13). The bottom of the inner support plate (3) is stably fitted and abutted against the pad (14).

2. The easily drainable detachable prosthetic foot according to claim 1, characterized in that: The pad (14) is a raised platform in the shape of a foot sole. The pad (14) is a curved arc surface that is lower in the front and higher in the back. The heel of the pad (14) is also recessed with two positioning grooves (12). The positioning grooves (12) are countersunk holes. A connector (33) is also installed at the top of the heel of the inner support plate (3), and two locking pins (32) are also provided at the bottom of the heel of the inner support plate (3). The connector (33) is locked to the top of the heel of the inner support plate (3) by the two locking pins (32). The two locking pins (32) are positioned one-to-one and sealed against the two positioning grooves (12). The positioning grooves (12) and the locking pins (32) have the same shape, and the positioning grooves (12) and the locking pins (32) are in clearance fit.

3. The easily drainable detachable prosthetic foot according to claim 2, characterized in that: It also includes a rear retaining edge (5) and a front retaining edge (51), both of which are fixed directly above the annular groove (22); The front gusset (51) is a horseshoe-shaped plate structure. The front gusset (51) is fixed to the toe of the fake foot cover (1) with its concave surface facing backward. The front gusset (51) blocks the toe of the inner support plate (3) directly above it. The rear gusset (5) is a U-shaped protrusion. The concave side of the rear gusset (5) is arranged around the heel of the fake foot cover (1). The rear gusset (5) blocks the inner support plate (3) directly above the heel. Furthermore, the rear retaining edge (5) does not interfere with the connecting piece (33); The rear gusset (5) and the front gusset (51) are both integrally formed with the false foot cover (1); The prosthetic foot cover (1) is a flexible polyurethane prosthetic foot.

4. The easily drainable detachable prosthetic foot according to claim 1, characterized in that: At least one guide channel (21) is connected to each of the left and right sides of the water tank (2), and the end of the guide channel (21) connected to the water tank (2) is higher than the end connected to the ring channel (22). The outer end of the guide groove (21) is obliquely arranged towards the drain hole (23); The prosthetic foot cover (1) has at least one drainage hole (23) on each of its inner and outer sides. The annular groove (22) is an inclined groove at the heel that is higher than the forefoot. The drainage hole (23) is connected to the lowest point of the annular groove (22). The annular groove (22) is foot-shaped.

5. The easily drainable detachable prosthetic foot according to claim 1, characterized in that: The inner support plate (3) is an elastic multi-layer carbon fiber plate, and the inner support plate (3) is a curved thin sheet with a lower front and a higher back; the protrusion height of the card plate edge (13) is greater than the thickness of the inner support plate (3); The slot (31) and the plate edge (13) are in clearance fit, and the clearance does not exceed 0.5mm.

6. The easily drainable detachable prosthetic foot according to claim 1, characterized in that: The clamp (4) is an I-shaped spring steel sheet; The card (4) has a locking groove (41) with an outer opening on each of its left and right sides. The locking grooves (41) on the left and right sides of the card (4) are respectively locked onto the left and right sides of the assembly groove (11). The locking grooves (41) are clamped on the inner and outer side walls of the mounting hole (15). The shaft of the chuck (42) is set horizontally in the left-right direction.

7. The easily drainable detachable prosthetic foot according to claim 3, characterized in that: The assembly groove (11) is located above the rear retaining edge (5), and the assembly groove (11) does not contact the rear retaining edge (5).

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