Waterproof light artificial foot

Abstract

The utility model discloses a waterproof light 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, a keel and a weight reducing groove are added on the foot core and are matched with each other, so that the structural support strength of the foot core is effectively ensured, the dead weight of the artificial foot is effectively reduced, and the waterproof light artificial foot is convenient to use. Further, the stump load of the user is reduced, the amount of exercise of the wearer during walking is reduced, and the disabled can use the device more effortlessly; the static ankle connecting disc tightly covers the top of the foot core and the top of the outer layer of the artificial foot, so that the foot core is effectively waterproof, a central water tank and a side water tank are additionally arranged, water at the top of the foot core can be guided and drained away, water vapor can be conveniently volatilized, water is effectively prevented from being deposited between the foot core and the static ankle connecting disc, the static ankle connecting disc and a butt joint bolt are effectively prevented from being rusted, and the service life of the foot core is prolonged. The whole structure of the foot core can be conveniently 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 utility model relates to the technical field of artificial limb, especially to a waterproof light-weight artificial foot. BACKGROUND

[0002] Artificial limb is a kind of artificial body specially designed and made for amputees or limb defect patients by engineering technology, also known as artificial limb. Its main function is to replace the lost part of the body and restore the self-care and working ability of amputees.

[0003] Artificial limb is divided into upper artificial limb and lower artificial limb. Lower limb artificial limb can be divided into several categories according to different amputation planes of lower limbs: foot and ankle artificial limb, lower leg artificial limb, thigh artificial limb and hip joint disarticulation artificial limb. No matter which plane is amputated, artificial limb can achieve the purpose of supporting the body and walking.

[0004] The foot artificial limb part is also known as artificial half foot or artificial foot. Artificial foot is needed for artificial limb of any amputation plane. Common artificial feet include single-axis foot, universal foot and static ankle foot.

[0005] The structure of static ankle foot generally includes a foot core inside for support and a polyurethane foot outer layer outside. The foot core also needs to be installed with a static ankle connecting disc, i.e. a cover plate at the ankle, and then connected with the leg tube at the upper end through the static ankle connecting disc. The static ankle connecting disc is used for convenient alignment and disassembly with other structures at the upper end. Therefore, the top of the static ankle connecting disc has a four-sided square pyramid-shaped connecting bolt for clamping. This is a general structure of artificial foot. In order to facilitate installation, the bolt needs to protrude on the top of the artificial foot. The connecting bolt below needs to be integrated with the foot core of the static ankle foot for connecting the artificial foot with the artificial limb or residual limb above as a whole.

[0006] The foot core of static ankle foot is generally made of plastic or wood to make the artificial foot more lightweight. However, the bolt can only be made of stainless steel. The wooden foot core is greatly affected by temperature and humidity. Especially after accidentally soaking in water on a rainy day, it is easy to swell after drying and prone to cracks, which reduces the service life. The plastic foot core is prone to water accumulation. Moreover, the connection between the plastic foot core and the polyurethane foot outer layer is not firm, which is prone to peeling off from the outer layer. This may cause the polyurethane foot outer layer to separate from the foot core, especially after soaking in water. The situation is more serious. In daily life, the top of the foot core of the artificial foot is prone to water splashing, especially when washing. It is inevitable for water to splash on the artificial foot. Plastic and silicone do not have water absorption, and water droplets will accumulate in the gap of the foot core. Long-term water accumulation will corrode the bolt, and water will also seep into the gap between the static ankle connecting disc and the foot core. Long-term water accumulation will also corrode or slip the static ankle connecting disc, which is not conducive to the long-term use of the artificial foot.

[0007] Based on this, the utility model discloses a waterproof light weight artificial foot to solve above -mentioned problem. Utility model content

[0008] The utility model discloses a waterproof light weight artificial foot, the device adds keel and weight reduction groove on the foot core, and the both mutual cooperation, that is, effectively guarantee the structural support strength of foot core, effectively reduce the dead weight of artificial foot further, reduce the residual limb load of user, alleviate the motion amount of wearer when walking, make the disabled use more labor saving, the device still adds center water tank and side water tank, can flow away the water of foot core top, also can be convenient for the evaporation of water vapor, effectively avoid the water in the foot core and static ankle connecting disc between the siltation, effectively avoid static ankle connecting disc and butt joint bolt corrosion, also can be convenient for keeping the overall structure of foot core dry, increase the service life of whole artificial limb, make artificial foot also more convenient for maintenance and cleaning.

[0009] The utility model is realized as follows: a waterproof light weight artificial foot, comprising:

[0010] Artificial foot outer layer, foot core, static ankle connecting disc, center water tank and keel;

[0011] The foot core is an overall structure;

[0012] The center of the splicing surface of the top of the foot core is also vertically provided with a main lock hole, and the bottom supporting surface of the foot core is vertically provided with a bottom lock hole, the bottom lock hole is communicated with the main lock hole, and the axis of the main lock hole and the bottom lock hole is coincident;

[0013] The static ankle connecting disc is a buckle cover, a four-rib square pyramid is protruded upward on the top of the static ankle connecting disc, the four-rib square pyramid is internally provided with a threaded hole, the four-rib square pyramid is externally closed, the threaded hole of the four-rib square pyramid is arranged on the bottom of the static ankle connecting disc, and a butt joint bolt is vertically arranged in the main lock hole; The static ankle connecting disc is closely covered on the top of the foot core, the butt joint bolt passes through the bottom lock hole and the main lock hole from bottom to top, and the upper end of the butt joint bolt is locked in the threaded hole in the bottom of the static ankle connecting disc;

[0014] The top of the foot core is provided with a center water tank and a side water tank, the front-rear direction axis of the center water tank is coincident with the front-rear direction axis of the foot core, the side water tank has two, and the two side water tanks are symmetrically and parallelly arranged on the left and right sides of the center water tank;

[0015] The two ends of the center water tank are arranged outside the covering range of the static ankle connecting disc, and the left and right side side water tanks are also arranged outside the covering range of the static ankle connecting disc;The bottom of the center water tank and the two side water tanks are communicated with the same water guide hole, and the lower end opening of the water guide hole is arranged on the side wall of the bottom of the bottom lock hole;

[0016] The outer layer of the artificial foot is a silica gel sheath, the outer layer of the artificial foot is wrapped outside the foot core, a top cover is arranged on the top of the outer layer of the artificial foot, and the top cover is detachably arranged on the top of the outer layer of the artificial foot.

[0017] The docking bolt on the top of the static ankle connecting disc extends above the top cover, the top joint seams of the foot core and the outer layer of the artificial foot are both below the top cover, and the top cover does not contact the foot core.

[0018] Further, the foot core further comprises a keel, an upper support and a bottom column, the keel is a vertical plate arranged in the front-rear direction, and the keel is vertically arranged on the vertical central axis surface of the foot core.

[0019] The upper support and the bottom column are both circular tubes, the upper support is vertically connected to the top of the bottom column, the keel, the upper support and the bottom column are integrally formed by injection molding, the upper support is sleeved outside the main lock hole, and the bottom column is sleeved outside the bottom lock hole.

[0020] The diameter of the bottom lock hole is larger than that of the main lock hole.

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

[0022] Further, the outer surface of the foot core is uniformly provided with anti-skid particles.

[0023] The left and right side walls of the foot core are further recessed to form weight-reducing grooves, the weight-reducing grooves are arranged on the left and right sides of the keel, and a muscle hole is arranged on each of the front and rear sides of the keel, and the muscle hole communicates the weight-reducing grooves on the left and right sides of the keel.

[0024] The left and right sides of the upper support and the bottom column are each vertically provided with a reinforcing rib, the reinforcing rib is a vertical plate arranged in the left-right direction, and the weight-reducing grooves on the two sides are divided into two independent grooves by the reinforcing rib.

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

[0026] Further, two auxiliary lock holes are vertically arranged on the top of the foot core, 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 the two sides of the main lock hole; and the auxiliary lock holes do not contact the central water tank.

[0027] A non-slip bolt is locked in each auxiliary lock hole, the non-slip bolt is a stainless steel bolt, and the non-slip bolt passes through the static ankle connecting disc from top to bottom and is locked in the auxiliary lock hole.

[0028] The static ankle connecting disc and the docking bolt are integrally formed of stainless steel.

[0029] Further, the top cover is a plastic cover plate.

[0030] The top cover is not in contact with the foot core, and the height difference between the top cover and the top of the foot core is 1-3 mm.

[0031] The center water tank and the side water tank are both in the covering range of the top cover, and the center water tank and the side water tank are not in contact with the top cover.

[0032] Further, the bottom of the artificial foot outer layer has an opening, and the lower end opening of the bottom lock hole is in communication with the bottom opening of the artificial foot outer layer.

[0033] The beneficial effects of the utility model are: 1. The foot core of the device is a light plastic made hollow structure, the weight reduction groove is increased, the keel, upper support and bottom column are increased, the self-weight can be reduced under the premise of not reducing the overall strength of the structure, the device is more portable, the active residual limb activity intensity is effectively reduced, and the wearer uses more labor-saving.

[0034] 2. The device further increases the anti-skid bolt on the static ankle connecting disc, and the eccentric force is formed with the butt joint bolt, so that the butt joint bolt is effectively prevented from slipping and rotating, and the situation that the butt joint bolt is loosened due to the inclination of walking and stress in long-term use of the artificial foot is avoided.

[0035] 3. The device further increases the center water tank, side water tank and water guide hole, can effectively guide the water storage in the cavity between the static ankle connecting disc and the foot core, the static ankle connecting disc does not completely block the center water tank and the side water tank, there is also a gap between the top cover and the foot core, the water vapor at the bottom of the static ankle connecting disc can be guided and dissipated, so that the accumulated water in the device can flow down from the guide hole along the bottom opening of the artificial foot outer layer, and the water vapor can be dissipated through the gap at the top, the situation that water is stored in the static ankle connecting disc is effectively avoided, and the overall service life of the artificial foot is improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] The utility model will be further described in combination with the embodiments with reference to the drawings.

[0037] Figure 1 It is the whole structure schematic diagram of the utility model artificial foot;

[0038] Figure 2 It is the assembly state structure schematic diagram of the utility model static ankle connecting disc, foot core and artificial foot outer layer;

[0039] Figure 3 It is the whole structure schematic diagram of the utility model foot core;

[0040] Figure 4 It is the bottom structure schematic diagram of the utility model foot core;

[0041] Figure 5 It is the overhead structure schematic view of the foot core of the utility model;

[0042] Figure 6 It is the overhead schematic view of the keel overall structure of the utility model;

[0043] Figure 7 It is the static ankle connecting disc structure schematic view of the utility model;

[0044] Figure 8 It is the foot core side surface and top cap position relation schematic view of the utility model;

[0045] Figure 9 It is the water guide hole connection schematic view of the foot core inside of the utility model.

[0046] In the drawing, the component list represented by each sign is as follows:

[0047] 1-prosthetic foot outer layer, 11-top cap, 12-main lock hole, 13-bottom lock hole, 14-secondary lock hole, 2-foot core, 21-weight reduction groove, 22-rib hole, 23-stiffener, 3-static ankle connecting disc, 31-butting bolt, 32-anti-skid bolt, 33-four square pyramid, 4-central water tank, 41-side water tank, 42-water guide hole, 5-keel, 51-upper strut, 52-bottom column. DETAILED DESCRIPTION

[0048] Please refer to Figures 1 to 9 The utility model provides a waterproof light quality artificial foot, in order to better understand the above technical scheme, below will combine with the drawing of specification and the above technical scheme is explained in detail to the specific implementation.

[0049] In the utility model technical scheme one specific embodiment:

[0050] Including prosthetic foot outer layer 1, foot core 2, static ankle connecting disc 3, central water tank 4 and keel 5;

[0051] The foot core 2 is the overall structure, is the overall structure of high-strength plastic injection molding, makes its weight lighter, and the structural strength is also higher, and the bottom of the foot core 2 is the inclined plane of low front high back, can be cambered surface, more round easy to make and install, has no stress dead angle;

[0052] The splicing surface center of the top of the foot core 2 is also vertically provided with the main lock hole 12, the main lock hole 12 vertically penetrates the bottom support surface of the foot core 2 from top to bottom, the bottom support surface of the foot core 2 is vertically provided with the bottom lock hole 13, the bottom lock hole 13 is communicated with the main lock hole 12, and the axis of the main lock hole 12 and the bottom lock hole 13 coincides;The bottom of the prosthetic foot outer layer 1 has an opening, and the lower end opening of the bottom lock hole 13 is communicated with the bottom opening of the prosthetic foot outer layer 1, so that the accumulated water in the foot core 2 can be conveniently guided to the outside of the foot bottom of the prosthetic foot outer layer 1, to avoid the internal accumulation of water in the foot core 2.

[0053] The foot core 2 is further provided with a keel 5, an upper pillar 51 and a bottom pillar 52. The keel 5 is a flat plate vertically arranged along the front-rear direction, and is vertically arranged on the vertical central axis surface of the foot core 2;

[0054] The upper pillar 51 and the bottom pillar 52 are both circular tubes, the upper pillar 51 is vertically butted at the top of the bottom pillar 52, the keel 5, the upper pillar 51 and the bottom pillar 52 are integrally formed by injection molding, the upper pillar 51 is sleeved outside the main lock hole 12, and the bottom pillar 52 is sleeved outside the bottom lock hole 13;

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

[0056] The outer diameter of the upper pillar 51 is smaller than that of the bottom pillar 52, and the upper pillar 51 and the bottom pillar 52 form a stepped shaft structure with the upper small and the lower large.

[0057] The outer surface of the foot core 2 is uniformly provided with anti-skid particles to form a frosted anti-skid pattern, so that the foot core 2 as a whole has anti-skid performance through the frosted pattern, thereby making the connection between the foot core 2 and the artificial foot outer layer 1 more stable and not easy to slip.

[0058] The left and right side walls of the foot core 2 are further provided with weight-reducing grooves 21 inwardly recessed, the weight-reducing grooves 21 are provided 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, and the density of the foot core 2 is greater than that of the artificial foot outer layer 1. Such weight-reducing grooves 21 have a significant effect on reducing the overall weight of the artificial foot.

[0059] The front and rear sides of the keel 5 are each provided with a muscle hole 22, and the muscle hole 22 communicates the weight-reducing grooves 21 on the left and right sides of the keel 5. The muscle hole 22 is used to fill the artificial foot outer layer 1 in the muscle hole 22 after the artificial foot outer layer 1 is injection molded, so as to form mutual hooking, make the connection between the artificial foot outer layer 1 and the keel 5 more firm and stable, effectively avoid uneven stress, and the foot core 2 is stressed through the static ankle connecting disc 3. In addition to the pulling stress on the top of the artificial foot outer layer 1, the muscle hole 22 also has pulling stress. Similarly, the inwardly recessed weight-reducing grooves 21 also form pulling stress between the artificial foot outer layer 1 and the foot core 2, so that the artificial foot outer layer 1 and the foot core 2 are stressed in more dimensions and more ways, the connection is more firm, the adhesive gap is effectively prevented from being pulled too much, more structural stress is formed, the adhesive surface is pulled less, and the probability of the adhesive surface being pulled apart to form a gap is effectively reduced.

[0060] The left and right sides of the upper pillar 51 and the bottom pillar 52 are each vertically provided with a reinforcing rib 23, and the reinforcing rib 23 is a flat plate vertically arranged along the left-right direction. The two weight-reducing grooves 21 on the left and right sides are separated into two independent grooves by the reinforcing rib 23.

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

[0062] The static ankle connecting disc 3 is a stainless steel cover, and a four-sided pyramid 33 is protruded upward on the top of the static ankle connecting disc 3. The inside of the four-sided pyramid 33 is a threaded hole, and the outside of the four-sided pyramid 33 is closed. The threaded hole of the four-sided pyramid 33 is arranged at the bottom of the static ankle connecting disc 3, and a butt joint bolt 31 is vertically arranged in the main lock hole 12. The static ankle connecting disc 3 is tightly covered on the top of the foot core 2, the butt joint bolt 31 passes through the bottom lock hole 13 and the main lock hole 12 from bottom to top in sequence, and the upper end of the butt joint bolt 31 is locked in the threaded hole at the bottom of the static ankle connecting disc 3. Although the static ankle connecting disc 3 is made of stainless steel, the split assembly structure of the device can be easily disassembled, and the butt joint bolt 31 and the threaded hole at the bottom of the four-sided pyramid 33 need to be filled with sealing glue to ensure stable and firm bolt connection and better sealing effect. When the overall static ankle connecting disc 3 is damaged or the screw rod is damaged and needs to be replaced, the static ankle connecting disc 3 can be reinstalled after positioning at the maintenance point, so that professional personnel can replace it.

[0063] Two auxiliary lock holes 14 are vertically arranged 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 are in the same vertical plane as the vertical axis of the main lock hole 12, and the two auxiliary lock holes 14 are symmetrically arranged on the two sides of the main lock hole 12. The auxiliary lock hole 14 does not contact the central water groove 4, the connecting line of the two auxiliary lock holes 14 forms an eccentric angle with the central water groove 4, and the central water groove 4 is on the front-rear direction central axis.

[0064] A non-slip bolt 32 is locked in each auxiliary lock hole 14. The non-slip bolt 32 is a stainless steel bolt, and the non-slip bolt 32 passes through the static ankle connecting disc 3 from top to bottom and is locked in the auxiliary lock hole 14. The edge of the static ankle connecting disc 3 is locked on the top of the foot core 2 through the non-slip bolt 32, and the center of the static ankle connecting disc 3 is locked on the foot core 2 through the butt joint bolt 31.

[0065] The static ankle connecting disc 3 and the butt joint bolt 31 are made of stainless steel as a whole. The conventional static ankle connecting disc 3 only has a cover plate and a bolt, so it can be locked with the foot core 2. It is easy to slip, easy to accumulate water on the top for a long time, and easy to rust. In addition, only one bolt is locked, and the bolt and the cover plate are easy to rotate with the foot core 2, which causes the device to slip. In addition to the butt joint bolt 31, the device also increases the non-slip bolt 32, which can effectively prevent the static ankle connecting disc 3 and the butt joint bolt 31 from rotating with the foot core 2, and effectively prevent the foot core 2 from rotating and loosening with the static ankle connecting disc 31.

[0066] The top of the foot core 2 is provided with a central water groove 4 and a side water groove 41. The front-rear direction axis of the central water groove 4 coincides with the front-rear direction axis of the foot core 2. The side water groove 41 has two, and the two side water grooves 41 are symmetrically and parallelly arranged on the left and right sides of the central water groove 4.

[0067] The center water tank 4 and the two side water tanks 41 are arranged outside the static ankle connecting disc 3, and the bottom of the center water tank 4 and the two side water tanks 41 are communicated with the same water guide hole 42, and the lower end of the water guide hole 42 is arranged on the side wall of the bottom lock hole 13.

[0068] The outer layer 1 of the artificial foot is a silica gel sheath, the outer layer 1 of the artificial foot is wrapped outside the foot core 2, and the top cover 11 is arranged at the top of the outer layer 1 of the artificial foot, and the top cover 11 is detachably covered at 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 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 1-3mm;

[0070] The center water tank 4 and the side water tank 41 are in the covering range of the top cover 11, and the center water tank 4 and the side water tank 41 are not in contact with the top cover 11. The water vapor generated in the center water tank 4 and the side water tank 41 can be discharged through the gap between the top cover 11 and the top of the foot core 2, so as to avoid water vapor accumulation to form water droplets.

[0071] The butt joint bolt 31 at the top of the static ankle connecting disc 3 is above the top cover 11, the top cover 11 covers the top of the foot core 2 and the outer layer 1 of the artificial foot, and the top cover 11 is above the foot core 2 without contact, and the top cover is sleeved on the static ankle connecting disc 3 and can be easily disassembled for cleaning.

[0072] It should be noted that:

[0073] 1. Sometimes the artificial foot is dirty and needs to be cleaned, which is inevitable. Once the artificial foot is cleaned, the top of the foot core 2 will be inevitably watered, and the top of the wooden foot core 2 will be coated with sealing varnish, but the wooden material will still absorb water, and long-term absorption of water will easily cause swelling, because the wooden material will volatilize internal water according to the environment, and after drying, it is easy to crack, resulting in shortening of the service life of the artificial foot. The device does not change the physical properties due to humidity change and watering, the device can easily clean the artificial foot, can wash the outside of the outer layer 1 of the artificial foot, and can also clean the top of the foot core 2, is convenient to use, the device can volatilize internal water through the center water tank 4 and the side water tank 41, and can also conveniently drain water;

[0074] 2. Existing prosthetic feet all require the use of connecting bolts 31. The conventional structure uses a single bolt to lock the prosthetic foot and the foot core into a whole. The foot core has bolt holes and is internally sealed. With such a structure, the foot core 2 can only try to prevent water from entering. Once water enters, it cannot be drained at all. Even water that seeps into the foot core 2 becomes extremely difficult to evaporate because it is completely sealed inside. This leads to the continuous accumulation of water inside the foot core, resulting in a dark and damp internal environment, which will cause many problems for use, such as mold, scale, and moss growth. Wooden ones will also shrink and crack. These problems will not occur with this device because it has excellent drainage. The top cover 11 can also be removed for cleaning. This device can use a blower to dry the water in the central water tank 4 and the side water tank 41, effectively preventing the continuous accumulation of water inside the foot core and thus avoiding these problems caused by dampness and water accumulation.

[0075] 3. The existing prosthetic foot core 2 is solid, and the internal structure is solid, which results in a lack of structural design and heavy weight. In contrast to the existing solid integral foot core 2, this device has a weight-reducing groove 31 to form a hollow support structure. Under the condition of using the same material foot core, this device is lighter.

[0076] 4. The current foot core 2 lacks stress guidance and can only bear the load rigidly, resulting in a greater reaction force on the user. This device is lower in the front and higher in the back. Figure 8 As shown, the stress is directed towards the toes, making the overall force transmission more forward. The heel has more silicone cushioning, reducing the vertical recoil force and alleviating the reaction force of the human residual limb. At the same time, the hollow structure makes it lighter. These two aspects reduce the user's exercise fatigue and make wearing it more effortless.

[0077] In the manufacturing process of this utility model, the foot core 2 is first made using a mold, and then the matching static ankle connecting plate 3 is made. The foot core 2 is then placed into the mold of the outer layer 1 of the prosthetic foot. Finally, the outer layer 1 of the prosthetic foot and the foot core 2 are injection molded and bonded into an integral structure. The outer layer 1 of the prosthetic foot is an elastic silicone structure with air bubbles injected inside. It has low density, elasticity, and can cushion the human body. It is also lightweight. The foot core 2 is a high-strength plastic, which is heavier, has strong load-bearing capacity, does not absorb water, and is corrosion resistant.

[0078] After the core 2 and the outer layer 1 of the prosthetic foot form an integral structure, the structure has high strength. The bottom of the core 2 is lower in the front and higher in the back, which can form a force-bearing structure with the ball of the foot as the main support, resulting in less reaction force and less effort when walking.

[0079] The front side of the device refers to the toe side, the rear side refers to the heel side, the left and right refer to the medial and lateral sides of the foot, the top refers to the dorsal surface of the foot, and the bottom refers to the plantar surface; the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated having a specific orientation, being constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0080] Although the specific embodiments of the utility model are described above, those skilled in the art should understand that the specific examples described by us are only illustrative, not for limiting the scope of the utility model, and equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the utility model should be covered within the scope of protection of the claims of the utility model.

Claims

1. A waterproof, lightweight prosthetic foot, characterized by Include: The outer layer of the artificial foot (1), the foot core (2), the static ankle connecting disc (3), the center water tank (4) and the keel (5); The foot core (2) is a whole structure; The center of the splicing surface of the top of the foot core (2) is also vertically provided with a main lock hole (12), the bottom supporting surface of the foot core (2) is vertically provided with a bottom lock hole (13), the bottom lock hole (13) is communicated with the main lock hole (12), and the axis of the main lock hole (12) and the bottom lock hole (13) coincides; The static ankle connecting disc (3) is a cover, a four-pronged square pyramid (33) is upwardly provided on the top of the static ankle connecting disc (3), the inside of the four-pronged square pyramid (33) is a threaded hole, the outside of the four-pronged square pyramid (33) is closed, the threaded hole of the four-pronged square pyramid (33) is provided on the bottom of the static ankle connecting disc (3), a butt joint bolt (31) is vertically provided in the main lock hole (12); the static ankle connecting disc (3) is tightly covered on the top of the foot core (2), the butt joint bolt (31) passes through the bottom lock hole (13) and the main lock hole (12) from bottom to top in sequence, and the upper end of the butt joint bolt (31) is locked in the threaded hole in the bottom of the static ankle connecting disc (3); The top of the foot core (2) is provided with a center water tank (4) and a side water tank (41), the front-rear direction axis of the center water tank (4) coincides with the front-rear direction axis of the foot core (2), the side water tank (41) has two, and the two side water tanks (41) are symmetrically and parallelly arranged on the left and right sides of the center water tank (4); The two ends of the center water tank (4) are arranged outside the covering range of the static ankle connecting disc (3), and the left and right side water tanks (41) are also arranged outside the covering range of the static ankle connecting disc (3); the bottoms of the center water tank (4) and the two side water tanks (41) are communicated with the same water guide hole (42), and the lower end opening of the water guide hole (42) is provided on the side wall of the bottom of the bottom lock hole (13); The outer layer of the artificial foot (1) is wrapped outside the foot core (2), a top cover (11) is arranged on the top of the outer layer of the artificial foot (1), and the top cover (11) is detachably covered on the top of the outer layer of the artificial foot (1); The butt joint bolt (31) on the top of the static ankle connecting disc (3) is arranged above the top cover (11), the top splicing seams of the foot core (2) and the outer layer of the artificial foot (1) are arranged directly below the top cover (11), and the top cover (11) is not in contact with the top of the foot core (2); The center water tank (4) and the side water tank (41) are all arranged in the covering range of the top cover (11), and the center water tank (4) and the side water tank (41) are not in contact with the top cover (11); The bottom of the outer layer of the artificial foot (1) has an opening, and the lower end opening of the bottom lock hole (13) is communicated with the bottom opening of the outer layer of the artificial foot (1).

2. A waterproof, light-weight prosthetic foot according to claim 1, characterized in that: The inside of the foot core (2) is further provided with a keel (5), an upper support column (51) and a bottom column (52), the keel (5) is a vertical plate vertically arranged along the front-rear direction, and the keel (5) is vertically arranged on the vertical central axis surface of the foot core (2); The upper pillar (51) and the bottom pillar (52) are both circular tubes, the upper pillar (51) is vertically butted at the top of the bottom pillar (52), the keel (5), the upper pillar (51) and the bottom pillar (52) are integrally formed by injection molding, the upper pillar (51) is sleeved outside the main lock hole (12), and the bottom pillar (52) is sleeved outside the bottom lock hole (13). The diameter of the bottom lock hole (13) is greater than that of the main lock hole (12), The outer diameter of the upper pillar (51) is smaller than that of the bottom pillar (52).

3. A waterproof, light-weight prosthetic foot according to claim 2, characterized in that: The outer surface of the foot core (2) is uniformly provided with anti-skid particles; The left and right side walls of the foot core (2) are also inwardly recessed to form weight reduction grooves (21), the weight reduction grooves (21) are formed on the left and right sides of the keel (5), and the front and rear sides of the keel (5) are also each provided with a rib hole (22) that communicates the weight reduction grooves (21) on the left and right sides of the keel (5); The left and right sides of the upper pillar (51) and the bottom pillar (52) are each vertically provided with a reinforcing rib (23), and the reinforcing rib (23) is a flat plate vertically arranged along the left-right direction; the weight reduction grooves (21) on the two sides are separated into two independent grooves 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. A waterproof, light-weight prosthetic foot according to claim 1, characterized in that: The top of the foot core (2) is also vertically provided with two secondary lock holes (14), the secondary lock holes (14) are embedded with nuts, 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 the two sides of the main lock hole (12); the secondary lock holes (14) do not contact the central water tank (4); Each of the secondary lock holes (14) is locked with an anti-skid bolt (32), the anti-skid bolt (32) is a stainless steel bolt, and the anti-skid bolt (32) passes through the static ankle connecting disc (3) from top to bottom and is locked in the secondary lock hole (14); The static ankle connecting disc (3) and the butt bolt (31) are integrally formed of stainless steel.

5. A waterproof, light-weight prosthetic foot according to claim 1, characterized in that: The top cover (11) is a plastic cover plate; The top cover (11) is not in contact with the foot core (2) above, and the height difference between the top cover (11) and the top of the foot core (2) is 1-3 mm.

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