JP2016049388A - Artificial leg cover, artificial leg, manufacturing method of artificial leg cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an artificial leg cover which can be easily attached and detached, and has a simple structure.SOLUTION: A cylindrical artificial leg cover comprises: a flexible body having an upper part which is in substantially close contact with an outer periphery of a swelling portion of a socket of an artificial leg and is held from the substantially close contact portion to an upper end while coming into substantially close contact with the socket, a lower part which is held while coming into substantially close contact with an upper part of a foot part of the artificial leg, a first end part in a circumferential direction, which extends from the upper end to a lower end, and a second end part in the circumferential direction, which extends from the upper end to the lower end; and a connection member for connecting the first end part and the second end part. The first end part and the second end part can be attached and detached.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for manufacturing a cover for a lower leg prosthesis, a lower leg artificial leg, and a lower leg artificial leg cover.

  Prostheses can be broadly classified into thigh prostheses and lower leg prostheses. The thigh prosthesis is a prosthetic leg that is used when it is cut at a higher level than the knee joint, and includes a thigh, a knee joint, and a crus. The lower leg prosthesis is a prosthesis used when it is cut at a level lower than the knee joint.

  Conventionally, as a cover for a thigh prosthesis, for example, there is one disclosed in Patent Document 1. The cover for the thigh prosthesis is composed of a sponge-like upper knee exterior and lower knee exterior that are attached to the outer peripheries of the thigh pipe and the lower leg pipe constituting the skeleton structure.

  In addition, as a cover for a thigh prosthesis, for example, there is one disclosed in Patent Document 2. The cover for the thigh prosthesis is made of urethane foam that is attached around the skeletal structure and cut into a foot shape by a three-dimensional processing device.

  Further, as a cover for a leg prosthesis, a sponge-like cover shown in Patent Documents 1 and 2 and a cover made of urethane foam are generally used.

Utility Model Registration No. 3103785 JP 2009-56083 A

  However, the thigh prosthesis cover and the conventional lower leg prosthesis cover of Patent Documents 1 and 2 are made of sponge or urethane foam, so that it is not easy to attach and detach from the skeleton, and exchange and adjustment are complicated and time consuming. .

  In addition, when used for a long period of time, it tends to lose its shape due to the pressure of socks and the like, and the beauty is impaired. In addition, if the cover is repeatedly attached and detached, the cover may be painful and damaged.

  Moreover, since the cover of patent documents 1 and 2 is for a thigh prosthesis and it is necessary to consider the knee part which needs a bending | flexion, a structure becomes complicated and cost starts.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a crus prosthesis cover that is easy to attach and detach and has a simple structure, a crus prosthesis provided with the crus prosthesis, and a method for manufacturing the crus prosthesis cover. .

  In order to solve the above problems, a crus prosthesis cover according to the present invention is a tubular crus prosthesis cover, which is in close contact with the outer periphery of the bulge portion of the socket of the crus prosthesis, and from the close contact portion to the upper end An upper portion that is held in close contact with the socket, a lower portion that is held in close contact with a portion of the leg portion of the lower leg prosthesis, a first circumferential end extending from the upper end to the lower end, and an upper end A flexible main body having a second end in the circumferential direction extending toward the lower end; and a connecting member connecting the first end and the second end; and the first end and the first end Two ends are detachable.

  Here, the flexible main body is, for example, carbon, glass fiber, resin, or a mixture of carbon fiber, glass fiber, and resin. Moreover, although it is preferable to arrange | position a 1st edge part and a 2nd edge part from a viewpoint of an aesthetics, you may arrange | position to a side or the front.

  Preferably, in this lower leg prosthesis cover, the connecting member is any one of a fastener, a magnet and a hook. More preferably, it is a slide fastener included in the fastener and has a configuration in which both end portions are attached to each other, the overlapping portion of the end portions of the main body does not occur, the appearance is beautiful, and it is easy to attach and detach. In addition to the slide fastener, a surface fastener or a magnet may be used. In this case, the end portions of the main body are overlapped with each other by a predetermined amount. Thereby, it is easy to adjust the peripheral dimension of the lower leg prosthesis cover according to the user. A hook can also be used.

  Preferably, the lower leg prosthesis cover has a gap formed between the upper end of the main body and the socket in a state of being attached to the lower leg prosthesis. Here, the partial gap between the upper end of the main body and the socket means that a gap is not formed on the entire circumference of the upper end, but is formed at a predetermined position. According to this configuration, a bend that is a characteristic of the prosthetic leg portion is suppressed, and abnormal noise due to interference with the lower leg prosthetic leg cover when the prosthetic leg length is shortened is suppressed.

  Here, a conventional leg prosthesis will be described. A conventional leg prosthesis is generally a so-called skeletal leg prosthesis in which a strut and ankle joint are used as an intermediate member connecting the socket and the foot. In recent years, leaf springs have been increasingly used as intermediate members in place of struts and foot joints. The upper portion of the leaf spring is attached to the back surface of the socket with a bolt, extends downward therefrom, and the lower portion is bent like a heel and extends forward, and is connected to the foot portion. This lower leg prosthesis is often used mainly for sports.

  However, most leg prostheses using leaf springs as intermediate members are barely used, and sponges and urethane foam are not flesh around like conventional leg prostheses with a skeletal structure. This is because the flexibility of the leaf spring is impaired by fleshing. On the other hand, there is a demand for a lower leg prosthesis using a leaf spring to have an appearance like a healthy leg.

  Therefore, in order to solve these problems, a leg prosthesis according to the present invention is any one of claims 1 to 3, wherein the socket, the foot, and an intermediate member that connects the socket and the foot. A lower leg prosthesis cover according to item 1.

  According to this configuration, not only a conventional skeletal structure but also a leg prosthesis using a leaf spring can provide an appearance like a healthy leg.

  Preferably, in the lower leg prosthesis, the intermediate member is a curved leaf spring.

  Preferably, in the lower leg prosthesis, the upper part of the leaf spring is embedded in the socket, and the leaf spring and the socket are integrated.

  According to this configuration, unlike the lower leg prosthesis that is fastened with bolts behind the conventional socket, the upper part of the leaf spring is embedded in the socket, so that the lower leg prosthesis cover can be easily attached, Appearance is beautiful and you can get a good look. In addition, the lower leg prosthesis cover can be stably attached and is not easily displaced.

  Preferably, the lower leg prosthesis is fleshed along the leaf spring, the bottom portion of the foot contacting the ground connected to the front side of the leaf spring, the buttocks protruding upward behind the bottom portion, and the leaf spring. A foot-shaped exterior made of a foam material.

  According to this configuration, when the leaf spring moves up and down during use, the leaf spring stops at the bottom of the foot portion, thereby preventing the leaf spring from being damaged. In addition, when the leaf spring moves up and down, the vertical movement of the lower end of the lower leg prosthesis cover is absorbed by the exterior made of the foam material, and the bottom part prevents contact with the ground and prevents the lower leg prosthesis cover from being damaged. The flexibility of the lower leg prosthesis cover also helps. Here, the foam material is, for example, sponge or urethane foam.

  Further, a method for manufacturing a cover for a lower leg prosthesis according to the present invention is a method for manufacturing a cover for a lower leg prosthesis, and includes a step of manufacturing a lower leg prosthesis in advance, and covering the lower leg prosthesis with a sponge, A step of cutting out the foam cover according to the shape, a step of molding the lower leg prosthesis with the foam cover with a bandage containing gypsum, and molding a negative model; and pouring gypsum into the negative model; A step of forming a positive model, a step of covering the positive model with a laminated material, a step of covering the PVA back and casting a resin by vacuum forming, and after the resin is cured, the molded product is transferred to the positive model. Detaching, connecting the first end and the second end in a detachable manner, providing a first end and a second end in the circumferential direction, Remove the connection member Including kicking and step.

  Here, as the laminated material, for example, carbon fiber, glass fiber, nylon stockinet, or the like is used. The negative model is a mold for forming a positive model.

  Further, in the method for manufacturing a crus prosthesis cover, the step of covering the positive model with the laminated material may be a step of covering a plurality of the laminated materials. The number of sheets covered with the laminated material may be changed depending on the strength of the lower leg prosthesis cover and the type of laminated material. For example, when carbon fibers are used for the laminated material, two or more sheets are preferable from the viewpoint of the thickness and strength of the carbon fibers.

  Further, in the method for manufacturing the crus prosthesis cover, the connecting member is any one of a fastener, a magnet, and a hook.

  As described above, the crus prosthesis cover according to the present invention is easy to attach and detach, has a simple structure, and can be attached to a crus prosthesis using a skeletal structure or a leaf spring. Moreover, the manufacturing method of the lower leg prosthetic leg cover according to the present invention can manufacture the lower leg artificial leg cover. Moreover, even if the leg prosthesis according to the present invention uses a skeleton structure and a leaf spring, an appearance like a healthy leg can be obtained.

It is a perspective view which shows the cover for leg leg prostheses concerning one Embodiment. It is a rear view of the same leg prosthesis cover. It is a perspective view of a leg prosthesis with a lower leg prosthesis cover attached. It is the enlarged view which looked at the same leg prosthesis from the upper part. It is an enlarged view of the foot vicinity of the lower leg prosthesis. It is a side view of a state where shoes are put on a leg prosthesis to which a cover for leg prosthesis is attached. It is a perspective view of a lower leg prosthesis with another structure in a state where a lower leg prosthesis cover is attached. It is a rear view in the state where the lower leg prosthesis cover was opened. It is explanatory drawing which shows one manufacturing process of the cover for lower leg prostheses. It is explanatory drawing which shows one manufacturing process of the cover for lower leg prostheses. It is explanatory drawing which shows one manufacturing process of the cover for lower leg prostheses. It is explanatory drawing which shows one manufacturing process of the cover for lower leg prostheses. It is explanatory drawing which shows one manufacturing process of the cover for lower leg prostheses. It is explanatory drawing which shows one manufacturing process of the cover for lower leg prostheses.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described with reference to the drawings, but the present invention is not limited to the embodiments.

<1. Structure of lower leg prosthesis cover>
FIG. 1A is a perspective view of a lower leg prosthesis cover according to an embodiment of the present invention. FIG. 1B is a rear view of the same. As shown in FIGS. 1A and 1B, the lower leg prosthesis cover 10 includes a main body 11 and a fastener 12.

  The main body 11 has a thin cylindrical shape that covers from the vicinity of the knee portion to the foot portion and imitates the human lower leg. The upper portion 11a of the main body 11 has a shape along the shape of the upper portion of the socket 21 of the lower leg prosthesis 20, and the lower portion 11b of the main body 11 has a shape along the shape of the upper portion near the base of the foot portion 23 of the lower leg prosthesis 20. is there.

  The main body 11 has a vertical cut on the back surface, and includes a first end portion 11c and a second end portion 11d in the circumferential direction. The upper end and the lower end of the first end portion 11c and the second end portion 11d in the circumferential direction are rounded. This is to prevent corner damage and to facilitate opening and closing of the fastener when the fastener 12 is attached.

  In the present embodiment, the upper end of the main body 11 is lowered downward from both sides to the rear. This is because the knee is easily bent in accordance with the shape of the socket 21 of the lower leg prosthesis 20 described later.

  In the present embodiment, the lower end of the main body 11 is increased upward from both sides to the rear. This is to prevent the lower end of the main body 11 from coming into contact with the ground with respect to vertical movement during walking.

  The fastener 12 is a slide fastener. The fastener 12 is detachably connected to the cut in the vertical direction on the back surface of the main body 11, and is attached to the first end portion 11c and the second end portion 11d.

  Instead of the fastener 12, a hook-and-loop fastener or a magnet may be used. In that case, a predetermined amount of the first end portion 11c and the second end portion 11d are overlapped, and the surface fastener is formed on the surface of the first end portion 11c. A male or minus magnet is attached, and a female or positive magnet of a surface fastener is attached to the back surface of the second end portion 11d.

<2. Structure of lower leg prosthesis>
FIG. 2 is a perspective view of the lower leg prosthesis with the lower leg prosthesis cover 10 attached thereto, and is a perspective view showing the structure of the lower leg prosthesis through the lower leg prosthesis cover 10. In this figure, the lower leg prosthesis cover is indicated by a dotted line. FIG. 3 is an enlarged view of the same leg prosthesis as seen from above. FIG. 4 is an enlarged view of the vicinity of the leg portion of the lower leg prosthesis.

  As shown in FIG. 2, the lower leg prosthesis 20 includes a socket 21, a foot 23, and a leaf spring 22 that connects them as main components.

  As shown in FIGS. 2 and 3, the socket 21 is integrally provided with a mounting portion 21a for attaching a leaf spring 22 to the rear, and a space portion 21b for inserting a human knee and a lower thigh upward. The attachment part 21a is arranged behind the socket 21 and from the most swollen part of the person's calf to the upper part of the calf. The attachment portion 21 a is smoothly rounded upward and is smoothly connected to the socket 21. This roundness is to make it look like a person's calf round when viewed from above when the lower leg prosthesis cover 10 is worn (see FIG. 3).

  As shown in FIG. 2, the upper portion of the leaf spring 22 is fixed by being embedded in the attachment portion 21 a of the socket 21. The leaf spring 22 extends rearward from the attachment portion 21a of the socket 21, curves in the vicinity of the lower buttock, and extends forward. The back surface in front of the leaf spring 22 is firmly fixed to the bottom 23 a of the foot 23. A foot-shaped exterior portion 23 b is provided on the front surface of the leaf spring 22.

  As shown in FIGS. 2 and 4, the foot portion 23 includes a bottom portion 23 a, an exterior portion 23 b, and a flange portion 23 c. The bottom 23a has a sole shape like a shoe sole and is made of an elastic member. The elastic member is rubber, for example. A flange 23c is provided behind the bottom 23a. The collar part 23c is higher from the front to the rear. Like the bottom 23a, the flange 23c is made of an elastic member.

  The flange portion 23c has a slope that increases from the front to the rear, and when the leaf spring 22 moves up and down due to vertical movement during walking of a person, the flange portion of the leaf spring 22 comes into contact with the slope and the leaf spring Absorbs 22 vertical movements. This prevents the leaf spring 22 from contacting the ground and prevents damage to the leaf spring 22.

  A front end portion of the exterior portion 23b is fixed to the bottom portion 23a in the vicinity of the front end thereof. The exterior portion 23b has a foot-like sponge shape that protrudes from the front end portion fixed to the bottom portion 23a along the leaf spring 22 to the upper surface of the leaf spring 22.

  Next, the attachment structure to the lower leg artificial leg 20 of the lower leg artificial leg cover 10 will be described. The parts corresponding to the upper part 11a and the lower part 11b of the main body 11 of the lower leg prosthesis cover 10 are the upper part 10a and the lower part 10b.

  As shown in FIGS. 2, 3, and 4, the crus prosthesis 20 is a crus prosthesis to which a crus prosthesis cover 10 is attached. The upper part 10a of the crus prosthesis cover 10 is held in close contact with the part where the attachment part 21a is arranged behind the socket 21, and a gap C is formed at a predetermined position. The gap C is formed on both sides of the bulge portion at the top of the attachment portion 21a.

  Further, the lower part 10 b of the lower leg prosthesis cover 10 is held substantially in close contact with the upper part that is the base part of the foot part 23 and the vicinity of the buttocks of the leaf spring 22. The lower part 10b of the crus prosthesis cover 10 is held above the lower surface of the crus prosthesis 20 so that the lower end of the crus prosthesis cover 10 does not come into contact with the ground even when it moves up and down during walking. It is to do.

  The front shape of the lower part 10b of the lower leg prosthesis cover 10 is a shape along the curved surface shape of the upper part of the outer part 23b of the foot part 23, and the lower part 10b of the lower leg prosthesis cover 10 to the outer part 23b of the leg part 23b. Connected smoothly to the shape.

  FIG. 5 is a side view of a state where shoes are put on the lower leg prosthesis 20 to which the lower leg prosthesis cover 10 is attached. As shown in FIG. 5, the crus prosthesis 20 to which the crus prosthesis cover 10 is attached has a natural appearance since it has a shape imitating a human foot. The surface of the lower leg prosthesis cover 10 can be made to be a human skin color so as to have a more natural appearance. Moreover, general socks and shoes can be put on, and in that case, a natural appearance is obtained.

<3. Effects of this embodiment>
According to the lower leg prosthesis cover 10 of the present embodiment, since the fastener 12 is provided on the back surface, the lower leg prosthesis cover 10 can be easily detached from the lower leg prosthesis 20. In addition, it is a thin cylinder shaped like a human lower leg and is made of a mixed material of carbon fiber and resin, so the structure is simple, flexible, strong, and lightweight.

  In addition, the upper part 10a of the lower leg prosthesis cover 10 is substantially in close contact with the part where the mounting part 21a is arranged behind the socket 21, and the lower part 10b of the lower leg prosthesis cover 10 is an upper part of the base part of the foot part 23 and a leaf spring. Since it is almost in close contact with the vicinity of the buttocks 22 and is firmly held at these two points, it can be easily attached to a lower leg prosthesis using a skeletal structure and various lower leg prostheses using leaf springs.

  In addition, since the upper portion 10a of the lower leg prosthesis cover 10 and the portion where the attachment portion 21a is disposed behind the socket 21 are substantially in close contact with each other, the gap C is formed on both sides of the bulge portion on the upper portion of the attachment portion 21a. Suppresses noises caused by interference with the lower leg prosthetic leg cover when the prosthetic leg part is bent and the prosthetic leg length is shortened. Note that this gap is not always necessary because it depends on the size of the socket. It may also be necessary to match the shape with the healthy side.

  Further, since the lower portion 10b of the lower leg prosthesis cover 10 is held above the lower surface of the lower leg prosthesis 20, it is possible to prevent the lower end of the lower leg prosthesis cover 10 from coming into contact with the ground even when the leg is moved up and down. This prevents damage to the lower leg prosthesis cover 10. Moreover, since the exterior part 23b of the foot part 23 is made of sponge, the vertical movement of the lower leg prosthetic leg cover 10 due to the vertical movement during walking is absorbed to prevent the lower leg artificial leg cover 10 from being damaged.

  Further, since the lower leg prosthesis 20 is provided with the heel part 23c of the foot part 23, when the leaf spring 22 is moved up and down by a vertical movement during walking, the buttock of the leaf spring 22 comes into contact with the slope, The vertical movement of the spring 22 is absorbed. This prevents the leaf spring 22 from contacting the ground and prevents damage to the leaf spring 22.

<4. Modification of this embodiment>
FIG. 6A is a perspective view of a lower leg prosthesis having another structure with a lower leg prosthesis cover attached thereto. FIG. 6B is a rear view of the crus prosthesis cover with the fastener open. The main difference between the lower leg prosthesis 40 of this embodiment and the lower leg prosthesis 20 of the above embodiment is that the intermediate member of the lower leg prosthesis has a skeletal structure instead of the leaf spring 22.

  As shown in FIGS. 6A and 6B, the modified lower leg prosthesis cover 30 includes a main body 31 that covers from the vicinity of the upper end of the socket 41 of the lower leg prosthesis 40 to the upper part of the foot 43, and a fastener 32 disposed on the back surface. I have. The main body 31 is made of a mixed material of carbon fiber and resin and has flexibility.

  The lower leg prosthesis 40 includes, as main components, a socket 41, a foot portion 43, and a support column 42 that connects them.

  The socket 41 is longer and narrower than the socket 21, and has a space portion 41 a in which a human knee and a lower thigh are placed. Further, the socket 41 is swelled in the vicinity of the center in the vertical direction, and has a shape imitating a human calf. The upper part of the lower leg prosthesis cover 30 is in close contact with the outer periphery of the swollen portion near the center of the socket 41, and is closely held from the close portion to the vicinity of the upper end.

  The support column 42 is connected to the socket 41 and extends from the lower surface of the socket 41 to the foot portion 43. The foot portion 43 has a foot shape imitating a human foot. The lower portion of the support column 42 is connected to the foot portion 43, and the support column 42 protrudes from the vicinity of the center of the upper surface of the foot portion 43.

<5. Manufacturing process for lower leg prosthesis cover>
Next, the manufacturing process of the lower leg prosthesis cover 10 will be described. 7A to 7F are explanatory views showing respective manufacturing steps of the lower leg prosthetic leg cover 10.

  As shown in FIG. 7A, a foam cover 51 is cut out on a prosthetic leg 50 manufactured in advance with a hard sponge matched to the size of a healthy leg.

  As shown in FIG. 7B, a gypsum bag 52 is wound around a lower leg prosthesis 50 with a foam cover 51, and after the plaster bag 52 is hardened, the lower leg prosthesis 50 is extracted and a negative model is obtained.

  As shown in FIG. 7C, gypsum is poured into a negative model and hardened to create a positive model 53. Then, an exterior trimming line is entered in the positive model 53. When entering the trimming line, the trimming line is set in consideration that the lower leg prosthesis cover 10 which is the final molded product is held at two points of the socket and the foot.

  As shown in FIG. 7D, the positive material 53 is covered with a laminated material 54. The laminated material in the present embodiment uses carbon fibers as an example, and two layers of carbon fibers are covered as an example. For example, glass fiber or nylon stockinette may be used instead of carbon fiber. Further, the number of laminated layers 54 may be changed according to the material and required strength, and may be one or two or more. In addition, when a skin pattern or other pattern is to be applied to the surface, a pattern may be put on the laminated material 54.

  As shown in FIG. 7E, a PVA back 55 is placed on this and a resin 56 is poured by vacuum forming. The resin 56 soaks into the carbon fiber as the laminated material 54 and waits for the resin 56 to cure.

  As shown in FIG. 7F, when the resin 56 is cured, the molded product is cut with a Gibbs cutter or the like and removed from the positive model 53. At this time, a cut is made in the part to which the fastener 12 of the molded product is attached, that is, the back surface. Then, trimming is performed with a carving machine. At this time, it becomes easy to put the fastener 12 by scraping the insertion part of the fastener 12. Thus, the main body 11 is completed.

  And the fastener 12 is attached to the 1st end part 11c and the 2nd step part 11d of the main body 11, and the cover 10 for lower leg prostheses is completed (refer FIG. 1).

<6. Other Embodiments>
As described above, the preferred embodiments of the present invention have been described with reference to the drawings, but various additions, modifications, or deletions can be made without departing from the spirit of the present invention. For example, the fastener 12 of the lower leg prosthesis cover 10 is not limited to a slide fastener, and a hook-and-loop fastener may be used. In this case, when a predetermined amount of the first end portion 11c and the second end portion 11d are overlapped, a male surface fastener is attached to the surface of the first end portion 11c and a female surface fastener is attached to the back surface of the second end portion 11d. Good. Similarly, a magnet may be used instead of the hook-and-loop fastener. The material of the main body 11 of the lower leg prosthesis cover 10 is not limited to the mixed material of carbon fiber and resin, and other flexible materials may be used. Therefore, such a thing is also included in the scope of the present invention.

10 Lower leg prosthesis cover 10a Upper part 10b Lower part 11 Main body 11a Upper part 11b Lower part 11c First end part 11d Second end part 12 Fastener 20 Lower leg prosthesis 21 Socket 21a Attachment part 21b Space part 22 Leaf spring 23 Leg part 23a Bottom part 23b Exterior part 23c Thigh 30 Prosthetic Leg Cover (Modification)
31 Body 32 Fastener 40 Lower leg prosthesis (modified)
41 Socket 42 Post 43 Leg 50 Leg Prosthesis 51 Foam Cover 52 Plaster Bag 53 Positive Model 54 Laminate 55 PVA Back 56 Resin C Gap

Claims (10)

A tubular lower leg prosthesis cover,
An upper part that is substantially in close contact with the outer periphery of the bulging part of the socket of the lower leg prosthesis, and is held in intimate contact with the socket from the substantially intimate part to the upper end;
A lower part which is held in close contact with the upper part of the leg part of the lower leg prosthesis,
A first circumferential end extending from the upper end to the lower end;
A second circumferential end extending from the upper end to the lower end;
A flexible body having
A connecting member connecting the first end and the second end;
With
The first end and the second end are removable.
Cover for lower leg prosthesis. The connecting member is any one of a fastener, a magnet, and a hook.
The lower leg prosthesis cover according to claim 1. In a state attached to the lower leg prosthesis, a gap is formed between the upper end of the main body and the socket.
The lower leg prosthesis cover according to claim 1 or 2. The socket;
The foot,
An intermediate member connecting the socket and the foot,
A lower leg prosthesis cover according to any one of claims 1 to 3,
Comprising
Lower leg prosthesis. The intermediate member is a curved leaf spring;
The leg prosthesis according to claim 4. The upper part of the leaf spring is embedded in the socket,
The leaf spring and the socket are integrated,
The leg prosthesis according to claim 5. The foot is
A bottom portion in contact with the ground connected to the leaf spring in front;
A collar that rises upward behind the bottom;
A foot-shaped exterior portion made of a foam material fleshed along the leaf spring;
Comprising
The leg prosthesis according to claim 5 or 6. A method of manufacturing a tubular lower leg prosthesis cover,
A step of producing a leg prosthesis in advance;
Covering the lower leg prosthesis with a sponge and scraping the foam cover in accordance with the shape of the healthy leg;
Forming a negative model by molding the lower leg prosthesis with the foam cover with a bandage containing plaster;
Pouring gypsum into the negative model, setting the gypsum, and forming a positive model;
Covering the positive model with a laminate material;
Further, a process of covering the PVA back and casting the resin by vacuum forming,
Removing the molded product from the positive model after the resin is cured;
A step of making a cut in the vertical direction in the molded product, and providing a first end and a second end in the circumferential direction;
Attaching a connecting member that detachably connects the first end and the second end;
Comprising
A method of manufacturing a lower leg prosthesis cover. The step of covering the positive model with a laminated material is a step of covering a plurality of the laminated materials.
The manufacturing method of the cover for lower leg prostheses of Claim 8. The connecting member is any one of a fastener, a magnet, and a hook.
A method for manufacturing a cover for a leg prosthesis according to claim 8 or 9.

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