A waterproof light weight prosthetic foot

Abstract

The application discloses a waterproof light-weight artificial foot in the technical field of artificial limbs, which comprises an artificial foot outer layer, a foot core and a static ankle connecting disc, the artificial foot outer layer is wrapped outside the foot core, the device is provided with a keel and a weight-reducing groove on the foot core, and the two cooperate with each other, that is, the structural support strength of the foot core is effectively ensured, the self-weight of the artificial foot is effectively reduced, the residual limb load of a user is further reduced, the exercise amount of a wearer during walking is reduced, and the artificial foot is more labor-saving for a disabled person; the static ankle connecting disc is tightly covered on the top of the foot core and the artificial foot outer layer, the foot core is effectively waterproofed, the device is further provided with a central water groove and a side water groove, water on the top of the foot core can be drained away, water vapor can be volatilized, water accumulation between the foot core and the static ankle connecting disc is effectively avoided, the static ankle connecting disc and the butt joint bolt are effectively prevented from rusting, the overall structure of the foot core can be kept dry, the service life of the whole artificial limb is prolonged, and the artificial foot is more convenient to maintain and clean.

Description

Technical Field

[0001] The present invention relates to the technical field of artificial limbs, in particular to a waterproof and lightweight artificial foot. Background Art

[0002] A prosthesis, also known as a prosthetic limb, is an artificial limb designed and manufactured using engineering techniques to compensate for amputees or those with incomplete limb loss. Its primary function is to replace some of the functions of a lost limb, allowing amputees to regain a certain level of independence and work ability.

[0003] Prosthetic limbs are divided into upper and lower limb prostheses. Lower limb prostheses can be divided into several categories based on the amputation level: ankle prostheses, calf prostheses, thigh prostheses, and hip disarticulation prostheses. Regardless of the amputation level, the prosthesis can achieve the purpose of supporting the body and allowing walking.

[0004] The prosthetic foot, also known as a half-foot or prosthetic foot, is required regardless of the amputation plane. Common prosthetic feet include single-axis feet, universal feet, and static ankle feet.

[0005] The structure of a static ankle foot is generally a foot core for support inside, and a polyurethane prosthetic foot outer layer wrapped outside. The top of the foot core for support also needs to be installed with a static ankle connecting plate, which is a cover plate at the ankle, and then connected to the leg tube at the upper end through the static ankle connecting plate. The function of the static ankle connecting plate is to facilitate easy alignment and disassembly with other structures on the upper end. Therefore, there is a four-sided square pyramid-shaped connecting bolt on the top of the static ankle connecting plate for clipping. It is a common structure of prosthetic feet. In order to facilitate installation, this bolt needs to protrude from the top of the prosthetic foot, and the bottom of the connecting bolt needs to be connected to the foot core of the static ankle foot as a whole, which is used to connect the prosthetic foot to the upper prosthetic limb or residual limb as an overall force-bearing structure.

[0006] The core of a static ankle prosthesis is typically made of plastic or wood, making it lighter, but the bolts must be made of stainless steel. Wooden cores are highly susceptible to temperature and humidity, especially after being accidentally soaked in water during rainy days. They can easily swell and crack after drying, shortening their service life. Plastic cores, on the other hand, are prone to water retention. Furthermore, the plastic core is not firmly connected to the polyurethane outer layer of the prosthetic foot, which can easily peel off, causing the polyurethane outer layer to separate from the core. This is especially serious after being wet or soaked in water. In daily life, the top of the prosthetic foot core is easily splashed by water, especially when washing. Plastic and silicone are not water-absorbent, so water droplets will accumulate in the gaps of the core. Long-term water accumulation can corrode the bolts and the gap between the static ankle connection plate and the core. Long-term water accumulation can also corrode or cause the static ankle connection plate to slip, hindering the long-term use of the prosthesis.

[0007] Based on this, the present invention designs a waterproof and lightweight artificial foot to solve the above problems. Summary of the Invention

[0008] The purpose of the present invention is to provide a waterproof and lightweight prosthetic foot. The device adds a keel and a weight-reducing groove on the foot core. The two cooperate with each other to effectively ensure the structural support strength of the foot core and effectively reduce the weight of the prosthetic foot, thereby reducing the load on the user's residual limb, reducing the amount of exercise when the wearer walks, and making it more labor-saving for disabled people to use; the device also adds a central water tank and a side water tank, which can divert and drain water from the top of the foot core, and facilitate the volatilization of water vapor, effectively avoiding water accumulation between the foot core and the static ankle connecting plate, effectively avoiding rust on the static ankle connecting plate and the docking bolts, and also facilitating the maintenance and cleaning of the overall structure of the foot core, thereby increasing the service life of the entire prosthesis.

[0009] The present invention is achieved as follows: a waterproof and lightweight artificial foot, comprising:

[0010] The outer layer of the artificial foot, the foot core, the static ankle connection plate, the central sink and the keel;

[0011] The foot core is an integral structure;

[0012] A main locking hole is vertically provided at the center of the joint surface at the top of the foot core, and a bottom locking hole is vertically provided on the bottom supporting surface of the foot core. The bottom locking hole is connected to the main locking hole, and the axes of the main locking hole and the bottom locking hole coincide with each other;

[0013] The static ankle connection plate is a buckle cover, and a square pyramid is protruding upward from the top of the static ankle connection plate. The interior of the square pyramid is a threaded hole, and the exterior of the square pyramid is closed. The threaded hole opening of the square pyramid is set at the bottom of the static ankle connection plate, and a docking bolt is vertically set inside the main locking hole. The static ankle connection plate tightly covers the top of the foot core, and the docking bolt passes through the bottom locking hole and the main locking hole from bottom to top, and the upper end of the docking bolt is locked in the threaded hole at the bottom of the static ankle connection plate.

[0014] A central water tank and a side water tank are provided on the top of the foot core. The front-to-back axis of the central water tank coincides with the front-to-back axis of the foot core. There are two side water tanks, which are symmetrically arranged in parallel on the left and right sides of the central water tank.

[0015] The two ends of the central water trough extend outside the coverage of the static ankle connection plate, and the side water troughs on the left and right sides are also arranged outside the coverage of the static ankle connection plate; the bottoms of the central water trough and the two side water troughs are connected to the same water guide hole, and the lower end opening of the water guide hole is opened on the bottom side wall of the bottom lock hole;

[0016] The outer layer of the artificial foot is a silicone leather cover, which is wrapped around the outside of the foot core. A top cover is provided on the top of the outer layer of the artificial foot, and the top cover is detachably mounted on the top of the outer layer of the artificial foot;

[0017] The docking bolts on the top of the static ankle connection plate extend above the top cover, the top joints between the foot core and the outer layer of the artificial foot are directly below the top cover, and the top cover is above the foot core without contact.

[0018] Furthermore, a keel, an upper support and a bottom support are provided inside the foot core. The keel is a flat plate vertically provided in the front-back direction. The keel is vertically provided on the vertical mid-axis plane of the isolation foot core.

[0019] The upper support and the bottom support are both round tubes. The upper support is vertically connected to the top of the bottom support. The keel, the upper support and the bottom support are an integral structure of injection molding. The upper support is sleeved outside the main lock hole, and the bottom support is sleeved outside the bottom lock hole.

[0020] The bottom lock hole has a diameter larger than the main lock hole.

[0021] The outer diameter of the upper support column is smaller than the outer diameter of the bottom support column.

[0022] Furthermore, anti-skid particles are evenly arranged on the outer surface of the foot core;

[0023] The left and right side walls of the foot core are further recessed to form weight-reducing grooves, which are provided on the left and right sides of the keel. A rib hole is also provided on the front and back sides of the keel, respectively, and the rib hole connects the weight-reducing grooves on the left and right sides of the keel.

[0024] A reinforcing rib is vertically provided on the left and right sides of each of the upper and lower pillars. The reinforcing rib is a flat plate vertically provided along the left and right directions. The weight-reducing grooves on both sides are divided into two independent grooves in front and back by the reinforcing ribs.

[0025] The two rib holes are respectively arranged on the front and rear sides of the reinforcing rib.

[0026] Furthermore, two auxiliary lock holes are vertically opened on the top of the foot core, and nuts are embedded in the auxiliary lock holes. The vertical axes of the two auxiliary lock holes are in the same vertical plane as the vertical axis of the main lock hole, and the two auxiliary lock holes are symmetrically arranged on both sides of the main lock hole; the auxiliary lock holes do not contact the central water tank;

[0027] Each of the auxiliary lock holes is locked with an anti-slip bolt, which is a stainless steel bolt. The anti-slip bolt passes through the static ankle connection plate from top to bottom and is locked in the auxiliary lock hole;

[0028] The static ankle connecting plate and the butt bolts are an integral structure made of stainless steel.

[0029] Furthermore, the top cover is a plastic cover;

[0030] The top cover is located above the foot core without contact, and the height difference between the top cover and the top of the foot core is 1-3 mm;

[0031] The central water trough and the side water troughs are both within the covering range of the top cover, and the central water trough and the side water troughs are not in contact with the top cover.

[0032] Furthermore, the outer layer of the artificial foot has an opening at the bottom, and the lower end opening of the bottom locking hole is communicated with the bottom opening of the outer layer of the artificial foot.

[0033] The beneficial effects of the present invention are as follows: 1. The foot core of the device is a hollow structure made of lightweight plastic, with an additional weight-reducing groove, a keel, an upper support and a bottom support, which can reduce the weight without reducing the overall strength of the structure. The device is lighter and effectively reduces the intensity of the active residual limb, making it easier for the wearer to use;

[0034] 2. This device also adds an anti-slip bolt on the static ankle connection plate, which forms an eccentric force with the docking bolt, effectively preventing the docking bolt from slipping and rotating. This also avoids the situation where the docking bolt rotates and becomes loose due to walking and tilting during long-term use of the prosthetic foot;

[0035] 3. This device also adds a central water tank, side water tanks and water guide holes, which can effectively divert the water stored in the cavity between the static ankle connection plate and the foot core. The static ankle connection plate does not completely block the central water tank and the side water tank. At the same time, there is a gap between the top cover and the foot core, which can guide the water vapor at the bottom of the static ankle connection plate to disperse, so that the accumulated water in this device can flow downward through the guide holes and along the bottom opening of the outer layer of the prosthetic foot. The gap at the top can also disperse the water vapor, effectively avoiding the occurrence of water accumulation inside the static ankle connection plate and improving the overall life of the prosthetic foot. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] Figure 1 This is a schematic diagram of the overall structure of the prosthetic foot of the present invention;

[0038] Figure 2 This is a schematic structural diagram of the assembled state of the static ankle connection plate, the foot core and the outer layer of the artificial foot of the present invention;

[0039] Figure 3 This is a schematic diagram of the overall structure of the foot core of the present invention;

[0040] Figure 4 This is a schematic diagram of the bottom structure of the foot core of the present invention;

[0041] Figure 5This is a schematic diagram of the top view of the foot core structure of the present invention;

[0042] Figure 6 This is a schematic top view of the overall structure of the keel of the present invention;

[0043] Figure 7 This is a schematic structural diagram of the static ankle connection plate of the present invention;

[0044] Figure 8 This is a schematic diagram of the positional relationship between the side surface of the foot core and the top cover of the present invention;

[0045] Figure 9 This is a schematic diagram of the connection of the water guide holes inside the foot core of the present invention.

[0046] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0047] 1-outer layer of the artificial foot, 11-top cover, 12-main lock hole, 13-bottom lock hole, 14-auxiliary lock hole, 2-foot core, 21-weight reduction groove, 22-rib hole, 23-reinforcement rib, 3-static ankle connection plate, 31-docking bolt, 32-anti-slip bolt, 33-quadrangular pyramid, 4-center water trough, 41-side water trough, 42-water guide hole, 5-keel, 51-upper support, 52-bottom support. DETAILED DESCRIPTION

[0048] See also Figures 1 to 9 As shown, the present invention provides a waterproof and lightweight artificial foot. In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0049] In a specific embodiment of the technical solution of the present invention:

[0050] The prosthetic foot comprises an outer layer 1, a foot core 2, a static ankle connection plate 3, a central water tank 4 and a keel 5;

[0051] The foot core 2 is an integral structure, which is a high-strength plastic injection-molded integral structure, making it lighter and having higher structural strength. The bottom of the foot core 2 is an inclined surface with a lower front and a higher back, which can be a curved surface, which is more rounded and easy to manufacture and install, and has no stress dead corners.

[0052] A main locking hole 12 is also vertically opened at the center of the splicing surface at the top of the foot core 2. The main locking hole 12 vertically penetrates the bottom supporting surface of the foot core 2 from top to bottom. The bottom supporting surface of the foot core 2 is vertically opened with a bottom locking hole 13. The bottom locking hole 13 is connected with the main locking hole 12, and the axis of the main locking hole 12 and the bottom locking hole 13 coincide; there is an opening at the bottom of the outer layer 1 of the artificial foot, and the lower end opening of the bottom locking hole 13 is connected with the bottom opening of the outer layer 1 of the artificial foot, which is convenient for diverting the accumulated water in the foot core 2 to the outside of the sole of the artificial foot outer layer 1, so as to avoid water accumulation inside the foot core 2.

[0053] The foot core 2 is further provided with a keel 5, an upper support 51 and a bottom support 52. The keel 5 is a flat plate arranged vertically in the front-back direction. The keel 5 is vertically arranged on the vertical central axis of the isolation foot core 2.

[0054] The upper support 51 and the bottom support 52 are both round tubes. The upper support 51 is vertically connected to the top of the bottom support 52. The keel 5, the upper support 51 and the bottom support 52 are an integral structure of injection molding. The upper support 51 is sleeved outside the main lock hole 12, and the bottom support 52 is sleeved outside the bottom lock hole 13.

[0055] The diameter of the bottom lock hole 13 is larger than that of the main lock hole 12.

[0056] The outer diameter of the upper support column 51 is smaller than the outer diameter of the bottom support column 52 , and the upper support column 51 and the bottom support column 52 form a stepped shaft structure with a smaller upper portion and a larger lower portion.

[0057] The outer surface of the foot core 2 is evenly provided with anti-skid particles, forming a frosted anti-skid pattern, so that the entire foot core 2 has anti-skid properties through the frosted pattern, thereby making the connection between the foot core 2 and the outer layer 1 of the artificial foot more stable and not easy to slip;

[0058] The left and right side walls of the foot core 2 are recessed inward to form weight-reducing grooves 21. The weight-reducing grooves 21 are located on the left and right sides of the keel 5. The weight-reducing grooves 21 can effectively reduce the weight proportion of the foot core 2. The density of the foot core 2 is greater than the density of the outer layer 1 of the prosthetic foot. Such weight-reducing grooves 21 have a significant effect on reducing the overall weight of the prosthetic foot.

[0059] A rib hole 22 is also provided on the front and back sides of the keel 5, and the rib hole 22 is connected to the weight-reducing grooves 21 on the left and right sides of the keel 5; the function of the rib hole 22 is that after the outer layer 1 of the artificial foot is injection-molded, the outer layer 1 of the artificial foot is filled in the rib hole 22 to form a mutual connection, so that the connection between the outer layer 1 of the artificial foot and the keel 5 is more firm and stable, and uneven force is effectively avoided. The foot core 2 is subjected to force through the static ankle connection plate 3. In addition to the pulling force on the top of the outer layer 1 of the artificial foot, the foot core 2 is also subjected to pulling force at the rib hole 22. Similarly, the weight-reducing groove 21 is concave inward, which will also form a pulling force between the outer layer 1 of the artificial foot, so that the outer layer 1 of the artificial foot and the foot core 2 are subjected to force in more dimensions and in more ways, and the connection is more firm, effectively avoiding excessive pulling of the bonding gap, more structural force, reducing the pulling force on the bonding surface, and effectively reducing the chance of the bonding surface being pulled to cause gap separation.

[0060] A reinforcing rib 23 is vertically provided on the left and right sides of the upper support 51 and the bottom support 52. The reinforcing rib 23 is a flat plate vertically provided along the left and right directions. The weight-reducing grooves 21 on both sides are separated into two independent grooves in front and back by the reinforcing rib 23.

[0061] The two rib holes 22 are respectively provided on the front and rear sides of the reinforcing rib 23 .

[0062] The static ankle connection plate 3 is a stainless steel buckle cover. A square pyramid 33 is protruded upward from the top of the static ankle connection plate 3. The interior of the square pyramid 33 is a threaded hole. The outside of the square pyramid 33 is closed. The threaded hole opening of the square pyramid 33 is set at the bottom of the static ankle connection plate 3. A docking bolt 31 is vertically set inside the main lock hole 12. The static ankle connection plate 3 is tightly covered on the top of the foot core 2. The docking bolt 31 passes through the bottom lock hole 13 and the main lock hole 12 from bottom to top. The upper end of the docking bolt 31 is locked in the threaded hole at the bottom of the static ankle connection plate 3. Although the static ankle connection plate 3 is made of stainless steel, the detachable assembly structure of this device can be easily disassembled. In addition, sealant needs to be filled between the docking bolt 31 and the threaded hole at the bottom of the square pyramid 33 to ensure that the bolt connection is stable and firm, and also has a better sealing effect. When the entire static ankle connection plate 3 is damaged or the screw is damaged and needs to be replaced, the static ankle connection plate 3 can be reinstalled after being positioned at the maintenance point. Professionals can also perform the replacement.

[0063] Two secondary lock holes 14 are vertically opened on the top of the foot core 2, and nuts are embedded in the secondary lock holes 14. The vertical axes of the two secondary lock holes 14 are in the same vertical plane as the vertical axis of the main lock hole 12, and the two secondary lock holes 14 are symmetrically arranged on both sides of the main lock hole 12; the secondary lock holes 14 do not contact the central water tank 4, and the line connecting the two secondary lock holes 14 forms an eccentric angle with the central water tank 4, and the central water tank 4 is on the central axis in the front-back direction;

[0064] Each secondary locking hole 14 is locked with an anti-slip bolt 32. The anti-slip bolt 32 is a stainless steel bolt. The anti-slip bolt 32 passes through the static ankle connecting plate 3 from top to bottom and is locked in the secondary locking hole 14. The edge of the static ankle connecting plate 3 is locked to the top of the foot core 2 by the anti-slip bolt 32, and the center of the static ankle connecting plate 3 is locked to the foot core 2 by the docking bolt 31.

[0065] The static ankle connecting plate 3 and the docking bolt 31 are an integral structure made of stainless steel. The conventional static ankle connecting plate 3 only has a cover plate and a bolt, which can be locked with the foot core 2. It is easy to slip, and the top is prone to rust due to water accumulation for a long time. Moreover, there is only one bolt for locking, and the bolt and the cover plate are prone to rotation with the foot core 2, resulting in slippage. In addition to the docking bolt 31, this device also adds an anti-slip bolt 32, which can effectively prevent the entire static ankle connecting plate 3 and the docking bolt 31 from rotating with the foot core 2, and effectively prevent the foot core 2 and the static ankle connecting plate 31 from rotating and loosening.

[0066] A central water tank 4 and a side water tank 41 are provided on the top of the foot core 2. The front-to-back axis of the central water tank 4 coincides with the front-to-back axis of the foot core 2. There are two side water tanks 41, which are symmetrically arranged parallel to the left and right sides of the central water tank 4.

[0067] Both ends of the central water trough 4 extend outside the coverage of the static ankle connection plate 3, and the side water troughs 41 on the left and right sides are also set outside the coverage of the static ankle connection plate 3; the bottom of the central water trough 4 and the two side water troughs 41 are connected to the same water guide hole 42, and the lower end opening of the water guide hole 42 is opened on the bottom side wall of the bottom lock hole 13;

[0068] The outer layer 1 of the artificial foot is a silicone leather cover, which is wrapped around the outside of the foot core 2. A top cover 11 is provided on the top of the outer layer 1 of the artificial foot. The top cover 11 can be detachably installed on the top of the outer layer 1 of the artificial foot; the top cover 11 is a plastic cover plate;

[0069] The top cover 11 is located above the foot core 2 without contact, and the height difference between the top cover 11 and the top of the foot core 2 is 1-3 mm;

[0070] The central water tank 4 and the side water tank 41 are both within the coverage of the top cover 11 and do not touch the top cover 11. Water vapor generated in the central water tank 4 and the side water tank 41 can be released through the gap between the top cover 11 and the top of the foot core 2, preventing water vapor from accumulating and forming water droplets.

[0071] The docking bolts 31 on the top of the static ankle connecting plate 3 extend above the top cover 11, and the top cover 11 covers the top of the foot core 2 and the outer layer 1 of the artificial foot. The top cover 11 is above the foot core 2 without contact. The top cover is mounted on the static ankle connecting plate 3 and can be easily removed for cleaning.

[0072] It should be noted that:

[0073] 1. The artificial foot is sometimes soiled and needs to be cleaned. Once the artificial foot is cleaned, it is inevitable to spray water on the top of the foot core 2. The top of the wooden foot core 2 will also be coated with sealing varnish, but it is still inevitable that the wood will absorb water. After absorbing water for a long time, it is easy to swell. Because the wood will volatilize the internal moisture according to the environment, it is easy to crack after drying, which shortens the life of the artificial foot. The device does not have the physical property changes caused by humidity changes and water spraying. The device can conveniently clean the artificial foot. The outer layer 1 of the artificial foot can be flushed with water to clean the top of the foot core 2. It is easy to use. The device can conveniently volatilize the internal moisture through the central water tank 4 and the side water tank 41, and it can also be convenient for drainage.

[0074] 2. Existing artificial feet all need to use docking bolts 31. The conventional structure is that a bolt locks the artificial foot and the foot core into a whole. The foot core has a bolt hole and is closed inside. With such a structure, the foot core 2 can only avoid water from entering as much as possible. Once water enters, it cannot be discharged at all. Even water that has penetrated into the foot core 2 becomes extremely difficult to evaporate because it is trapped in the completely closed foot core 2. This causes the water inside the foot core to continue to accumulate, resulting in a dark and humid internal environment, which will bring a lot of troubles to the user. Mildew, scaling, and moss will occur, and the wood will shrink, swell, and crack. These situations will not happen in this device because it has excellent drainage. The top cover 11 can also be disassembled for cleaning, so that the device can use a hair dryer to blow dry the water in the central water tank 4 and the side water tank 41, effectively avoiding continuous water accumulation inside the foot core, and thus avoiding these problems caused by moisture and water accumulation.

[0075] 3. The core 2 of existing artificial feet is solid, and the internal structure is solid, resulting in no structural design and heavy weight. The existing solid integral core 2, while the present device has a weight-reducing groove 31, forming a hollow bracket support structure. Under the condition of using the core of the same material, the present device is lighter.

[0076] 4. The current foot core 2 has no guide for stress bearing and can only bear the load rigidly, which results in a greater reaction force being fed back to the user. The device is lower in front and higher in the back. Figure 8 As shown, the stress is guided to the toes, making the overall force transmission more forward. The heel has more silicone cushioning, which reduces the vertical upward recoil force and alleviates the reaction force of the human body's residual limbs. At the same time, the hollow structure makes the weight lighter. From these two aspects, the user's exercise fatigue is reduced and wearing is more labor-saving.

[0077] During the production of the present invention, the foot core 2 is first made using a mold, and then the matching static ankle connection plate 3 is made. The foot core 2 is then placed into the mold of the outer layer 1 of the artificial foot, and finally the outer layer 1 of the artificial foot and the foot core 2 are injection molded and bonded into an integral structure. The outer layer 1 of the artificial foot is an elastic silicone structure with bubbles injected inside. It has low density and elasticity, can cushion the load on the human body, and is light in weight. The foot core 2 is made of high-strength plastic, is heavy, has strong load-bearing capacity, does not absorb water, and is corrosion-resistant.

[0078] After the foot core 2 and the outer layer 1 of the artificial foot form an integral structure, the structural strength is high. The bottom of the foot core 2 is low in the front and high in the back, which can form a force-bearing structure with the sole of the foot as the main support. The reaction force is smaller, and walking is more labor-saving.

[0079] The front side referred to in this device is the toe side, the back side is the heel side, the left and right refer to the inner and outer sides of the foot, the top refers to the back of the foot, and the bottom refers to the plantar surface of the foot; the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0080] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A waterproof and lightweight artificial foot, characterized in that: include: The artificial foot comprises an outer layer (1), a foot core (2), a static ankle connection plate (3), a central water tank (4) and a keel (5); The foot core (2) is an integral structure; A main locking hole (12) is vertically provided at the center of the joint surface at the top of the foot core (2), and a bottom locking hole (13) is vertically provided on the bottom supporting surface of the foot core (2). The bottom locking hole (13) is communicated with the main locking hole (12), and the axes of the main locking hole (12) and the bottom locking hole (13) coincide with each other; The static ankle connection plate (3) is a buckle cover, and a square pyramid (33) is protruding upward on the top of the static ankle connection plate (3), the interior of the square pyramid (33) is a threaded hole, and the exterior of the square pyramid (33) is closed. The threaded hole opening of the square pyramid (33) is arranged at the bottom of the static ankle connection plate (3), and a docking bolt (31) is vertically arranged inside the main locking hole (12); the static ankle connection plate (3) is tightly covered on the top of the foot core (2), and the docking bolt (31) passes through the bottom locking hole (13) and the main locking hole (12) in sequence from bottom to top, and the upper end of the docking bolt (31) is locked in the threaded hole at the bottom of the static ankle connection plate (3); A central water trough (4) and a side water trough (41) are provided on the top of the foot core (2); the front-back axis of the central water trough (4) coincides with the front-back axis of the foot core (2); there are two side water troughs (41), which are symmetrically arranged in parallel on the left and right sides of the central water trough (4); The two ends of the central water trough (4) extend outside the coverage of the static ankle connection plate (3), and the side water troughs (41) on the left and right sides are also arranged outside the coverage of the static ankle connection plate (3); the bottoms of the central water trough (4) and the two side water troughs (41) are connected to the same water guide hole (42), and the lower end opening of the water guide hole (42) is opened on the bottom side wall of the bottom lock hole (13); The outer layer (1) of the artificial foot is wrapped around the outside of the foot core (2); a top cover (11) is provided on the top of the outer layer (1) of the artificial foot; the top cover (11) is detachably mounted on the top of the outer layer (1) of the artificial foot; The docking bolts (31) on the top of the static ankle connecting plate (3) extend above the top cover (11), the top joint seams of the foot core (2) and the outer layer (1) of the artificial foot are directly below the top cover (11), and the top cover (11) is above the foot core (2) without contact.

2. The waterproof and lightweight prosthetic foot according to claim 1, characterized in that: A keel (5), an upper support (51) and a bottom support (52) are further provided inside the foot core (2); the keel (5) is a flat plate vertically provided in the front-back direction; the keel (5) is vertically provided on the vertical mid-axis plane of the isolation foot core (2); The upper support (51) and the bottom support (52) are both circular tubes. The upper support (51) is vertically connected to the top of the bottom support (52). The keel (5), the upper support (51) and the bottom support (52) are an integral structure formed by injection molding. The upper support (51) is sleeved outside the main lock hole (12), and the bottom support (52) is sleeved outside the bottom lock hole (13). The bottom lock hole (13) has a larger diameter than the main lock hole (12). The outer diameter of the upper support column (51) is smaller than the outer diameter of the bottom support column (52).

3. The waterproof and lightweight prosthetic foot according to claim 2, characterized in that: The outer surface of the foot core (2) is evenly provided with anti-slip particles; The left and right side walls of the foot core (2) are further recessed to form weight-reducing grooves (21), which are formed on the left and right sides of the keel (5). A rib hole (22) is also formed on the front and rear sides of the keel (5), respectively, and the rib hole (22) is connected to the weight-reducing grooves (21) on the left and right sides of the keel (5); A reinforcing rib (23) is vertically provided on the left and right sides of each of the upper pillar (51) and the bottom pillar (52), and the reinforcing rib (23) is a flat plate vertically provided along the left and right directions; the weight-reducing grooves (21) on both sides are divided into two independent grooves in the front and rear by the reinforcing rib (23); The two rib holes (22) are respectively arranged on the front and rear sides of the reinforcing rib (23).

4. The waterproof and lightweight prosthetic foot according to claim 1, characterized in that: Two auxiliary lock holes (14) are vertically provided on the top of the foot core (2), and nuts are embedded in the auxiliary lock holes (14). The vertical axes of the two auxiliary lock holes (14) and the vertical axis of the main lock hole (12) are in the same vertical plane, and the two auxiliary lock holes (14) are symmetrically arranged on both sides of the main lock hole (12); the auxiliary lock holes (14) do not contact the central water tank (4); An anti-slip bolt (32) is locked in each of the auxiliary locking holes (14), and the anti-slip bolt (32) is a stainless steel bolt. The anti-slip bolt (32) passes through the static ankle connecting plate (3) from top to bottom and is locked in the auxiliary locking hole (14); The static ankle connecting plate (3) and the butt bolt (31) are an integral structure made of stainless steel.

5. The waterproof and lightweight prosthetic foot according to claim 1, characterized in that: The top cover (11) is a plastic cover; The top cover (11) is located above the foot core (2) without contact, and the height difference between the top cover (11) and the top of the foot core (2) is 1-3 mm; The central water trough (4) and the side water trough (41) are both within the covering range of the top cover (11), and the central water trough (4) and the side water trough (41) are not in contact with the top cover (11).

6. The waterproof and lightweight prosthetic foot according to claim 1, characterized in that: The outer layer (1) of the artificial foot has an opening at the bottom, and the lower end opening of the bottom locking hole (13) is connected to the bottom opening of the outer layer (1) of the artificial foot.

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