JPH0838528A - Footwear for knee osteoarthritis patient - Google Patents

Abstract

PURPOSE:To facilitate walking while preventing strange appearance by removing the rear part of a shoe upper and forming the rear surface of a sole material from front and rear regions forming a fulcrum at the boundary of them and increasing the thickness of the sole material in the rear region at the fulcrum point as compared with that of the rear part thereof and providing an ankle part with a shock absorbing mechanism. CONSTITUTION:The rear part of a shoe upper 101 is removed to form the shoe upper into a sandal shape. A sole material 102 is constituted of a front region 3 and a rear region 4 and a fulcrum 5 is formed to the boundary of both regions 3, 4 so as to support load in a balance like state. The rear region 4 of the sole material is formed so that the thickness thereof in the vicinity of the fulcrum 5 is larger than that of the rear part thereof in order to float the line connecting the fulcrum 5 of the rear surface 7 of the sole material where a second metatarsal bone head part 30 is positioned in a landing state wherein an ankle part receives load from a horizontal line. An ankle part supporting elastic member 4a is attached to the ankle part as a shock absorbing mechanism.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to footwear used for patients with osteoarthritis of the knee, in addition to having the functions sufficient for use in the above-mentioned patients, and in addition to such functions, The present invention aims to obtain footwear having the above-mentioned function and having an appearance that is apparently the same as ordinary footwear in order to prevent the appearance from becoming strange.

[0002]

2. Description of the Related Art As a shoe which is said to be effective against a disease of the knee joint, as a conventional example 1, an extremely high heel as shown in FIG.
There are low shoes. According to the description of this shoe, it is effective for patients who have a unique gait due to extremely weak leg muscles. Further, in other examples, there is a shoe as shown in FIG. 19 as Conventional Example 2, which is sold for muscle training.

Although not shown in the drawings as Conventional Example 3, there is a known rocker shoe, which has an arcuate bottom surface and swings back and forth like a cradle.

Further, the same inventor of the present invention intends to obtain a functionally superior product to the conventional example described above.
There is a series of six prior applications (hereinafter referred to as prior applications) such as -107243. In this earlier application, the following theory is stated.

When a person walks and the heel starts landing, the heel connecting line is the angle between the heel and the foot, as shown in FIG. 20 (a). The impact of landing pushes it upwards (direction of arrow A) to generate a rotational force centering on the ankle (ankle), and acts to bend the knee (blur in the direction of arrow B) as shown in FIG. 20 (b). To do. The phenomenon in which the knee is pushed up by the heel and bent one step at a time in this way is one of the "natural shock absorption functions" given to humankind. The force that resists the force of arrow A is the spring of the heel, the force that resists the force of arrow B is the spring of the knee, and these springs absorb the impact of landing. However, on the other side, the force that the spring receives (the force of arrow A and arrow B) acts in a bad direction such as bending the knee joint. This phenomenon (arrow A, arrow B
The phenomenon in which the force of the knee acts to bend the knee) is called "the knee bending action of the heel".

The bending (that is, blurring) of the knee is repeated step by step, which causes wear of the knee joint of a patient with knee joint disease. As a solution to prevent this, in the prior application (JP-A-2-107243) filed by the same applicant as the present invention, as shown in FIG.
It is provided close to χ and is formed by cutting out a region behind it. This prevents the calcaneus from being pushed upwards (in the direction of arrow A) as shown in FIG. 20 due to the impact of landing when a person walks and the heel begins to land, which causes the knee to bend in the direction of arrow B. To be prevented. It is a theory that the lesions of the knee joint can be healed and at least the progression of the disease can be prevented by walking without bending the knee in this way and landing without the knee bending repeating step by step like this. The effect obtained by landing while keeping the joint in a non-flexed state is hereinafter referred to as "knee joint non-flexing effect". As described above, conventionally, there has been footwear for knee joint patients invented by the inventors of the above-mentioned prior application based on the above theory.

[0007]

[Problems to be Solved] The conventional footwear described above has the following problems. That is, FIG.
As shown in Fig. 3, there are shoes with extremely low heel 102, and according to the description of the shoes, it is effective for a patient who performs a unique gait due to extremely weak leg muscle strength. ing.
However, except for such a unique patient, this shoe is unsuitable for the general patient. On top of that, in shoes like this,
There is a habit of pulling the Achilles tendon due to lack of the "third state" shown in Fig. 2 (b) described below, and with regular use, not only the pulling effect (knee stretching effect) is diminished by continuous use, but also walking actually. It is difficult to walk. Moreover, due to the above-mentioned habit, there is a problem in that the angle at which the heel is lowered and the tip of the toe is raised cannot be set to a sufficient angle, and the patient has to put up with a small angle.

As a second conventional example, there is a shoe as shown in FIG. 19, which is sold for muscle training. However, this is an abnormal shape, and since force is exerted in the direction of stretching the knee, it may be a muscle training, but on the other hand, a cautionary note that the use of sick people is prohibited. That is, this is for the purpose of training a healthy person, and there is a problem that it is impossible for a physically handicapped person who does not have muscle strength to wear it even if he / she actually wears it.

In addition, as a conventional example 3, there is a so-called rocker shoe, which is not shown in the drawings, and has a shoe sole which has an arc shape and swings back and forth like a cradle. This type of shoe has the effect of protecting the ankle part, but on the other hand, the ground contact point changes back and forth (due to the movement of the fulcrum described later), so it is unstable in the front and rear, and the deformable knee that is the subject of the present invention. There is a problem that it has an adverse effect on the knees of arthropathy patients.

Further, in the shoe of the above-mentioned prior application by the same inventor of the present invention, as shown in FIG. 17, a substantial rear surface E of the lower surface of the heel is provided close to the vertical line χ-χ. As shown in the figure, the rear surface E of the bottom of the heel is cut out so that it does not extend beyond the slanted line A-A. Therefore, this slanted slope becomes a long slanted surface and the walking stride of a human being is kept constant. Therefore, since the inclination angle ρ of the slope cannot be reduced, the heel naturally increases. If the inclination angle ρ is made small (for example, 15 degrees) in order to prevent the heel from becoming high, as shown in FIG.
In the case of landing with the tip of the toe raised such as the angle θ shown in 0 (a) or in the case of a downhill, the rear part of the heel receives the direct hit of the arrow A and deteriorates the affected part. Therefore, it is inevitable that the angle ρ needs to be increased excessively (for example, 30 degrees) in consideration of the case where the tip of the toe is landed or the vehicle is going downhill. For this reason, when the heel becomes higher, the lower calcaneus b (FIG. 17) travels backward.

The above-mentioned phenomenon that the calcaneus travels backwards will be described with reference to the drawings. The conventional general high-heeled shoes (FIG. 21) and the extreme low-heeled shoes (FIG. 22). When comparing the above, when the heel becomes higher, the lower end a of the calcaneus draws an arc 103 about the ankle 50 and travels backward.
Such posterior protrusion of the lower calcaneus a is a general feature of high heels, which is significantly different from the lower calcaneus c of the low heel. As described above, a phenomenon in which the calcaneus lower end a in a general high-heeled shoe travels significantly rearward as compared with the calcaneus lower end c in the case of a low-heeled shoe is hereinafter referred to as a "backward protrusion of the heel".

FIG. 23 shows the relationship between the above-mentioned "heel rearward protrusion phenomenon" and heel height. In the figure, the distance that the lower calcaneus (the calcaneal furthest from the ankle) a, b or c is away from the vertical line χ-χ is a function of the height of the heel. That is, when the ankle 50 is used as a rotation axis and the lengths R1, R2, and R3 reaching the lower ends of the calcaneus a, b, or c from this axis are hypotenuses and χ-χ is the bottom, it is located along the arc 103. The distance D at which the point a, b or c moves away from the vertical line χ-χ has a relationship of D = R sin α, and the distance D increases as the height of the heel increases.
Therefore, the distance D is D1, D2, D3 depending on the height of the heel.
And changes. This distance D is a rotation mode applied to the rotation shaft 50.
You can think of it as a ment. Therefore, the position a in the case of the high heel is as shown in FIGS. 23 and 21, and the rotational force applied to the rotary shaft 50 is greater than the position c in the case of the extremely low heel (FIGS. 23 and 22). The size of the knees is very different, and the above-mentioned bad action, "the knee bending action of the heel", increases corresponding to the increase in the height of the heel. Unfortunately, the prior application shown in FIG. 17 is also a kind of high heel, so that the general high heel (see FIG.
As shown in 1), even in the prior application of FIG. 17, a large amount of the calcaneus lower end b protrudes rearward, and the protrusion increases the phenomenon of being pushed up (arrow A) described in FIG. 20, but In order to secure the angle ρ (FIG. 17) described above, the heel becomes high, and the calcaneus end is located at the position of b shown in FIG. 23 described above. There was a problem that it was unavoidable that a certain "backward protrusion of the heel" had an effect.

Further, the shoes shown in FIGS. 17, 18 and 19 have a problem that they have a strange appearance due to their special functions.

In addition, as an example of knee joint disease, varus knee (O
There are symptoms such as legs, crab crotch) and valgus knee (X leg),
In order to relieve or correct this symptom, a method is used in which a slope is provided inside the shoe sole to keep the inside (or outside) of the joint that you want to protect low, but the sloped surface on the sole like this is used. There is a problem that the cure rate of osteoarthritis of the knee is low only by means of forming it, and at present, it does not save the worries of many patients.

The present invention has been made to solve the above-mentioned problems, and is intended for patients with knee osteoarthritis.
An object of the present invention is to provide footwear for patients with knee osteoarthritis, which allows easier walking and does not have a strange appearance.

[0016]

The footwear for patients with knee osteoarthritis according to the present invention comprises a bottom material and an instep cover lacking a rear portion, and the bottom surface of the bottom material is a bottom material with a fulcrum as a boundary. It consists of an anterior region and a sole material posterior region, the lower end of the second metatarsal head of the human being is held higher than the lower end of the calcaneus of the human in a state where a load is applied to the heel part, and the second metatarsal head is The thickness of the bottom material in the rear area of the bottom material is formed so that the fulcrum portion is thicker than that in the rear area so that the lower surface of the bottom material located above the horizon is raised, and the rear area of the bottom material is formed on the human foot. It is provided with a shock absorbing mechanism in which the height of the heel portion of the contact surface is lowered when a load is applied.

Further, according to the present invention, in the footwear for patients with knee osteoarthritis, the sole material has a balance member for supporting the weight in a balance-like manner by the fulcrum.

According to the present invention, in the above-mentioned footwear for a patient with knee osteoarthritis, the balance member has a length substantially reaching from the front part of the heel to the front part of the metatarsal bone.

Further, in the present invention, in the above-described footwear for patients with knee osteoarthritis, the fulcrum forms a ridge line across the bottom surface of the sole material, and the distance of the ridge line from the rear end of the footwear is:
The ridgeline on the little finger side is positioned more forward than the ridgeline on the thumb side, measured parallel to the line connecting the center of the calcaneus and the second metatarsal head.

According to the present invention, in the footwear for patients with knee osteoarthritis, the shape of the bottom material bottom surface between the lower surface of the bottom material on which the second metatarsal head is located and the fulcrum is sideways when loaded. When viewed from the side, the shape is substantially linear or concave upward.

[0021] According to the present invention, in the footwear for patients with knee osteoarthritis, the bottom material bottom surface between the heel portion and the fulcrum is substantially linear or upwardly recessed when viewed from the side when loaded. It has a sword shape.

In the footwear for patients with knee osteoarthritis according to the present invention, the impact absorbing mechanism of the surface contacting the heel of the human has a knee that is a reaction force received by the heel from the ground when the human walks. In order to achieve shock absorption in place of or beyond the shock absorbing function of the human knee, which bends forward and absorbs shock.

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the impact absorbing mechanism is located at the heel of a human and easily elastically deforms under the load of the heel, at least a part of which is elastic. The elastic member has a heel portion supporting elastic member, or an upper layer member provided on the bottom member, and the surface of the upper layer member in contact with the human heel portion is lowered by elastic deformation thereof.

Further, according to the present invention, in the footwear for patients with knee osteoarthritis, the elastic force of the heel-supporting elastic member can be elastically deformed more easily than the balance member.

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the difference in elastic force between the balance member and the heel-supporting elastic member is due to air bubbles, perforations, voids and recesses. It is formed by at least one of a size difference or a number difference, a cross-sectional area difference, or a material elasticity difference.

According to the present invention, in the footwear for patients with knee osteoarthritis, the rear end of the lower surface of the elastic member for supporting the heel part is located at a position advanced from the rear end of the footwear, and the heel part is supported behind the heel part. Decorative heat that makes elastic deformation easier than elastic members
It has a profile forming member.

Further, according to the present invention, in the above-described footwear for a patient with knee osteoarthritis, when the load is applied, the affected part of the knee joint is lowered so that it is lowered from left to right when viewed from the rear or from the right. An inclined surface that lowers to the left is formed on the upper part of the bottom material.

Further, according to the present invention, in the footwear for patients with knee osteoarthritis, the inclined surface is formed on an upper layer member made of an elastic material provided on an upper part of the bottom material.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the inclined surface is formed so that the portion of the inclined surface which supports the human heel is elastically deformed more easily than other areas. There is something.

According to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the difference in partial elastic force of the inclined surface is the difference in size of bubbles, perforations, voids and recesses, or It is formed by at least one of the difference in the number and the difference in elasticity of the materials.

According to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, in the heel portion supporting elastic member, a portion carrying the lower side of the inclined surface carries a portion carrying the higher side of the inclined surface. In order to make it easier to descend as compared with, the difference in elastic force between the low-side supporting portion and the high-side supporting portion is provided.

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the difference in partial elastic force of the elastic member for supporting the heel part is large or small in the shape of bubbles, perforations, voids and recesses. It is formed by at least one of a difference or a difference in number, a difference in cross-sectional area, or a difference in elasticity of materials.

Further, the present invention provides the above-described footwear for patients with knee osteoarthritis, wherein the instep cover is on the lower side of the inclined surface so that a human foot does not slip toward the lower side of the inclined surface. It is reinforced with a reinforcement material compared to the instep on the side with a higher cover.

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the impact absorbing function is such that at least a part of the impact absorbing mechanism is formed of an impact absorbing material.

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the balance member, the heel portion supporting elastic member, and the decorative heel formed between the upper surface of the sole and the ground contact surface. The space of each member of the shape forming member and the space between the members are filled with an elastic material whose elasticity is weaker than that of each member.

In the footwear for patients with knee osteoarthritis according to the present invention, the shape of the ground contact surface located below the heel-supporting elastic member is located laterally when viewed from the rear and is on the ground. It is formed of both side portions that come into contact with, and an inner portion that is located between the both side portions and that does not substantially contact the ground when there is no load.

In the footwear for patients with knee osteoarthritis according to the present invention, the heel of the footwear receives a load of 70 kg at an angle at which the lower surface of the bottom material on which the second metatarsal head is located rises from the ground. The angle is at least 5 degrees in the state.

Further, according to the present invention, in the footwear for patients with knee osteoarthritis, the position of the fulcrum is measured from the rear end of the footwear body parallel to the second metatarsal, and is 4 with respect to the entire length of the footwear body.
The distance is 1% to 65%.

The present invention also provides the above-described footwear for patients with knee osteoarthritis, wherein the shock absorbing function is such that the upper layer member or the bottom member provided on the bottom member when the surface in contact with the heel of a human being receives a load of 70 kg. The elastic deformation of the elastic member supporting the heel portion absorbs the impact, and the height of the surface contacting the lower end of the heel of the human lowers at least 2% of the entire length of the footwear.

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the impact absorbing function is such that the heel portion has a load of 7
When 0 kg is received, the elastic deformation of the heel-supporting elastic member absorbs the impact, and the height of the rear end of the upper surface of the sole can drop by at least 1% of the total length of the footwear.

In the footwear for patients with knee osteoarthritis according to the present invention, the position at which the rear end of the lower surface of the heel-supporting elastic member is advanced from the rear end of the footwear is at least the rear end of the footwear. The position is 5% of the total length of the footwear.

Further, according to the present invention, in the above-mentioned footwear for a patient with knee osteoarthritis, the footwear lacking the rear part of the instep is a tack or a slipper.

[0043]

In the present invention, the main body of the footwear comprises the sole and the instep lacking the rear part of the instep. In footwear for patients suffering from knee osteoarthritis, the bottom surface of the sole is bounded by the fulcrum. The front part of the bottom material and the rear part of the bottom material, the lower end of the second metatarsal head of the human being is held higher than the lower end of the calcaneus of the human in a state where the heel part is loaded, and 2 The thickness of the bottom material in the rear region of the bottom material is formed such that the fulcrum portion is thicker than the rear portion thereof so that the bottom surface of the bottom material on which the metatarsal head is located floats from the horizontal line. The posterior region is equipped with a shock absorbing mechanism that allows the heel of the surface in contact with the human foot to drop when a load is applied, so that the lower surface of the metatarsal head is higher than the lower calcaneus when landing. By the "support effect close to the vertical line" that is held,
It is possible to reduce the "knee bending effect of the heel" in which the calcaneus is pushed up at the moment of landing and the knee is bent. On the other hand, since it is equipped with a shock absorbing mechanism that compensates for the loss of the "natural shock absorbing function" inherent in humankind, which is inevitably caused by its action, the above "loss of natural shock absorbing function" is provided. ”
Can be compensated for, and the toe can be lifted higher due to the fall of the heel part, and a "knee extension effect" can be generated.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, since the sole material has a balance member for supporting the weight in a balance-like manner by the fulcrum, the weight is in a balance-like manner. Support and transfer weight with a small burden.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the balance member has a length that substantially reaches from the front part of the heel to the front part of the metatarsal bone. Therefore, it is possible to carry the weight in a balance-like manner and to ensure the above-mentioned action.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the fulcrum forms a ridge line across the bottom of the sole material, and the distance of the ridgeline from the rear end of the footwear is the heel. Measured parallel to the line connecting the center of the bone and the second metatarsal head, the ridgeline on the little finger side was made to be more advanced than the ridgeline on the thumb side, so it is possible to correct symptoms such as the O-leg. it can.

According to the present invention, in the footwear for patients with knee osteoarthritis, the shape of the bottom material bottom surface between the lower surface of the bottom material on which the second metatarsal head is located and the fulcrum is sideways when loaded. The fulcrum is prevented from moving while the weight is moving, because the fulcrum is formed to have a substantially straight shape or a shape that is recessed upward as viewed from the side.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the bottom material bottom surface between the heel portion and the fulcrum has a substantially linear shape when viewed from the side when loaded or Since it is formed in a shape that is recessed upward, it is possible to accurately hold the above-mentioned rising angle so as not to swing back and forth.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the impact absorbing mechanism of the surface contacting the heel of the human is a reaction force received from the ground by the heel when the human walks. The knee bends forward to absorb impact, and instead of or beyond the impact absorption function of the human's knee, it achieves shock absorption, so there is sufficient loss of "natural impact absorption function". Can be compensated.

Further, in the present invention, in the above-described footwear for patients with knee osteoarthritis, at least a part of the impact absorbing mechanism is located at the heel of a human and easily elastically deforms under the load of the heel. Since it has a heel-supporting elastic member made of an elastic material or an upper layer member provided on the upper part of the bottom member, and the elastic deformation causes the surface of the upper layer member in contact with the human heel to drop, it is a "natural impact". The loss of "absorption function" can be compensated.

Further, according to the present invention, in the footwear for patients with knee osteoarthritis, the elastic force of the heel-supporting elastic member can be elastically deformed more easily than the balance member.
The shock absorbing function and the balance mechanism can be obtained.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the difference in elastic force between the balance member and the heel-supporting elastic member is due to the shapes of bubbles, perforations, voids and recesses. Since it is formed by at least one of the difference in size or the number, the difference in cross-sectional area, or the difference in elasticity of materials, the shock absorbing function and the weight carrying function can be appropriately formed.

Further, in the present invention, in the footwear for patients with knee osteoarthritis, the rear end of the lower surface of the elastic member for supporting the heel portion is located at a position advanced from the rear end of the footwear, and the heel member for supporting the heel portion is located behind it. Since it has a decorative heel shape forming member that is more easily elastically deformed than the elastic member, it is substantially located at a special position for obtaining the above-mentioned "support effect close to the vertical line". Despite the ends being located, the heel looks like normal footwear.

Further, in the present invention, in the above-mentioned footwear for a patient with knee osteoarthritis, when the load is applied, the affected part of the knee joint is lowered so that it is lowered from left to right when viewed from the rear or from the right. Since the inclined surface that becomes lower to the left is formed on the upper part of the bottom material, the left and right axial directions of the bones that are connected to the upper and lower sides of the joint can be corrected so as to protect the affected side of the knee joint.

According to the present invention, in the footwear for patients with knee osteoarthritis, since the inclined surface is formed on the upper layer member made of an elastic material provided on the upper portion of the bottom material, in addition to the above-described action, landing is achieved. Can absorb the shock of time.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the inclined surface is formed so that the portion of the inclined surface for supporting the human heel is elastically deformed more easily than other areas. Therefore, in addition to the above-mentioned action, it is possible to absorb the initial impact at the time of landing.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the difference in partial elastic force of the inclined surface is the difference in size of bubbles, perforations, voids and recesses, or Since it is formed by at least one of the difference in the number or the difference in the elasticity of the material, the difference in the elastic force for obtaining the above action can be adjusted appropriately.

In the present invention, in the footwear for patients with knee osteoarthritis, in the heel part supporting elastic member, the part supporting the lower side of the inclined surface supports the higher side of the inclined surface. Since the elastic force of the lower side bearing portion and the higher side bearing portion is made different so that the lower side bearing portion can be lowered more easily, it occurs as a result of the setting of the inclined surface in addition to the correction of the knee joint by the inclined surface. It is possible to prevent the uneven descent phenomenon of the heel.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the difference in partial elastic force of the elastic member for supporting the heel part is large or small depending on the shapes of bubbles, perforations, voids and recesses. Since it is formed by at least one of the difference in the number or the number, the difference in the cross-sectional area, or the difference in the elasticity of the material, the difference in the elastic force for obtaining the above-mentioned action can be appropriately adjusted.

Further, in the present invention, in the footwear for patients with knee osteoarthritis, the instep cover of the heel portion is an inclined surface so that the human foot does not slip toward the lower side of the inclined surface. Since the instep cover on the lower side is reinforced with the reinforcement material compared to the instep on the high side, it is possible to prevent the heel from slipping due to the inclination.

According to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, in the shock absorbing function, at least a part of the shock absorbing mechanism is formed of a shock absorbing material. It can absorb the initial impact of time.

According to the present invention, in the footwear for patients with knee osteoarthritis, the balance member, the heel portion supporting elastic member, and the decorative heel formed between the upper surface of the sole and the ground contact surface. The space of each member of the shape-forming member and the space between the members are filled with an elastic material whose elasticity is weaker than that of each member, so that the appearance is adjusted regardless of the presence of the bottom cover member. You can

Further, in the present invention, in the footwear for patients with knee osteoarthritis, the shape of the ground contact surface located below the heel portion supporting elastic member is located laterally when viewed from the rear, and It is composed of both side parts that come into contact with the ground and an inner part that is located between the two parts and that does not substantially come into contact with the ground when there is no load, so that even a light-weight person can elastically deform and absorb shock. Even a heavier person can carry the weight without being excessively elastically deformed, and can reduce the "uneven descent of the heel".

According to the present invention, in the footwear for patients with knee osteoarthritis, the angle at which the lower surface of the bottom material on which the second metatarsal head is located rises from the ground is such that the heel of the footwear receives a load of 70 kg. Since the angle is at least 5 degrees in the open state, it is possible to easily shift to the "third state".

Further, in the present invention, in the footwear for patients with knee osteoarthritis, the position of the fulcrum is measured from the rear end of the footwear body parallel to the second metatarsal bone, with respect to the entire length of the footwear body. Since it is installed at a distance of 41% to 65%, the action of the balance member can be made more effective.

Further, the present invention provides the above-mentioned footwear for patients with knee osteoarthritis, wherein the shock absorbing function is the upper layer member provided on the bottom member or the above-mentioned member when the surface in contact with the heel of a human being receives a load of 70 kg. Since the impact is absorbed by the elastic deformation of the heel-supporting elastic member, and the height of the surface contacting the lower end of the human heel causes a drop of at least 2% of the total length of the footwear, the "natural impact absorbing function" Can fully compensate for the loss of.

Further, in the present invention, in the footwear for patients with knee osteoarthritis, the impact absorbing function is to absorb the impact by elastic deformation of the heel portion supporting elastic member when the heel portion receives a load of 70 kg. However, since the height of the rear end of the upper surface of the sole material causes a drop of at least 1% of the entire length of the footwear, it is possible to partially compensate for the loss of the "natural shock absorbing function".

Further, in the present invention, in the footwear for patients with knee osteoarthritis, the position of the rear end of the lower surface of the heel-supporting elastic member is at least 5% of the total length of the footwear from the rear end of the footwear. From the above, it is possible to obtain the above "supporting effect close to the vertical line".

[0069]

EXAMPLES In the present invention, the above-mentioned footwear for patients with knee osteoarthritis may be formed as a "shoe" having a full instep as shown in Examples 1 to 5, or another embodiment. As for the form, it can be formed as a "trap" or "slipper" having no rear part of the instep so that it can be easily put on and taken off as shown in the sixth embodiment. The description of [action], [Example], and [Effect] that are common to both of the case with the instep and the case without the instep is represented by “shoe” as a representative throughout the specification. However, the same or corresponding portions common to both will be described with common reference numerals.

Example 1. FIGS. 1, 2 (a), (b) and (c) are views showing a state of a state when walking while wearing shoes for a patient with knee joint disease according to an embodiment of the present invention. The process up to kicking is shown in order, and is shown in a sectional view from a "first state" to a "fourth state" described later.

FIGS. 3 (a) and 3 (b) show the shoe of Example 1 of the present invention when there is no load, and FIG. 3 (c) is a bottom view of the sole material. FIG.
(a) is a vertical cross-sectional view taken along the dashed line vv of FIG. 3 (c),
FIG. 3B is a side view showing the outer appearance of the shoe of the first embodiment.

In FIG. 1, 100 is a shoe body, 101 is an upper, 102 is a bottom material, 3 is a bottom material elastic member, 4 is a bottom material rear area which indicates a rear area of a fulcrum 5, which will be described later, and 5 is a later description. In the "second state", the fulcrum is a fulcrum that supports the load in a balance-like manner, 7 is a bottom material lower surface located below the metatarsal head,
Reference numeral 8 is a balance member, and 9 is an upper layer member formed above the bottom material. In addition, 20 is a human heel part, 30 is a head of a human second metatarsal bone, 40 is a human second metatarsal bone, 50 is a human ankle center, 3c is a bottom cover material, and 4a is substantially Heel supporting elastic member 9a is the upper surface of the upper layer member 9 at the position where the lower end of the human heel contacts, and e is the heel supporting elastic member 4a.
The lower end rear end of is shown.

Although the bottom surface is covered with the bottom cover material 3c and the internal structure as shown in the sectional view cannot be seen from the bottom surface, for convenience of description, the fulcrum 5 described above and the heel portion supporting elastic member 4 described later are used.
The description of the rear end e of the lower surface of a will be made by ignoring the presence of the bottom cover member 3c. Another modification is a bottom cover material 3c.
May be omitted and the fulcrum 5 may be in direct contact with the ground, and the presence or absence of the bottom cover material 3c does not relate to the essential function. Here, the bottom cover material 3c may be integrally formed with the bottom material front elastic member 3 and / or the heel part supporting elastic member 4a described later. If the bottom cover member 3c is omitted, the internal structure is exposed, so that the balance member 8 formed between the upper surface of the bottom member and the ground contact surface, the heel portion supporting elastic member 4a, and a decorative cover to be described later. -The space of each member of the le-shape forming member 4b and the space between the members may be filled with an elastic material whose elasticity is weaker than that of each member to adjust the outer shape.

FIG. 1 is a sectional view showing a landing start state in which a load is applied to the heel portion. The height of the surface 9a, which is in contact with the lower end of the heel of a human as a part of the upper layer member 9, is formed so as to be lowered by at least 2% or more, or 5% in this embodiment, with respect to the entire length of the footwear under the condition of receiving 70 kg as a load. The lower end of the second metatarsal head 30 is held higher than the lower end of the calcaneus 20. This is a height that is contrary to the general concept of shoes.
Further, a line connecting the bottom material lower surface 7 where the second metatarsal head 30 is located and the fulcrum 5 is lifted from the horizontal line at a lift angle of 12 degrees. This is due to the difference in thickness from the bottom material upper surface to the ground in the bottom material rear region 4. That is, the bottom material rear region 4 is formed such that the thickness in the vicinity of the fulcrum 5 is thicker than the thickness of the rear portion thereof, and the balance member 8 further leans forward and leans to support the weight. The state as shown in FIG. 1 in which the lower part of the second metatarsal head is supported higher than the lower part of the calcaneus by the load on the heel part as described above is hereinafter referred to as “first state”.

As shown in FIG. 1, the angle at which the bottom surface 7 of the second metatarsal head floats up with respect to the horizontal line when loaded is as follows:
It is set to at least 5 degrees, preferably 6 degrees, 7 degrees or more with the heel portion receiving a load. According to experiments, 8 degrees, 9
The number of patients complaining about comfort increased as the angle increased to 10 degrees. Even if it was set to 15 degrees, 20 degrees, etc., it was functionally good except that the design became worse in proportion to the increase in angle. In this embodiment, the lifting angle is set to 12 degrees. As shown in the figure, the thickness of the bottom material is such that the line connecting the bottom material lower surface 7 where the second metatarsal head is located and the fulcrum 5 rises from the horizontal line at an angle with respect to the horizontal line. It is formed so that the rear side is thinner than the thickness of the position. When the bottom member 102 thus gradually becomes thicker from the rear toward the fulcrum 5, the top surface of the bottom member also moves forward due to the inclination of the balance member 8 when the balance member 8 is tilted to the front as shown in FIG. An ascending slope is formed. Therefore, the upper surface of the bottom material is higher in the vicinity of the fulcrum 5 than in the vicinity of the heel portion supporting elastic member 4a, and the balance member 8 is inclined forward and upward, and the lower end of the second metatarsal head 30 supported by the upper surface of the bottom material is the heel. It is held higher than the lower end of the bone 20.

In the present embodiment, the line (oblique side) R4 connecting the ankle and the calcaneus lower end d shown in FIGS. 1 and 23 is increased by the above-mentioned χ by increasing the lifting angle of the second metatarsal head.
-X, the "supporting effect close to the vertical line" provides a "non-flexing effect on the knee joint", and a "knee extension effect" described below also occurs to prevent abrasion of the knee joint. The effect described in [Effect 1] is produced.

In the experiment of this embodiment, the rising angle is set to 12 degrees. If the angle is too small, the effect will be poor, and if the angle is too large, the effect will be large, but the shape will not be normal. Based on the results of trials with 20 patients at the time of filing this application, the gait habits of patients are mixed and the medical conditions are light and severe, so it depends on what patients and what medical conditions are targeted. , Each angle shall be selected.

In the present embodiment, the position of the rear end e of the lower surface of the heel portion supporting elastic member 4a, which is a portion for substantially supporting the weight, is set at 10% of the total length of the shoe as measured from the rear end of the shoe. Further, a decorative heel shape forming member was provided in the cutout portion at the rear thereof (described later).

In the unloaded state shown in FIG. 3 (a), the heel part supporting elastic member 4a for carrying the weight on the heel part at the start of landing is a pre-calculated elastic material and is formed in the calculated shape. However, when landing is started and the body weight is supported, it is compressed and deformed as shown in FIG. Further, in this embodiment, as shown in FIG. 15, a decorative heel shape forming member 4b is formed behind the heel portion supporting elastic member 4a, and the decorative heel shape forming member 4b is as much as possible in weight. Since it is formed so as to be deformed more easily than the heel portion supporting elastic member 4a so as not to be involved in carrying the heel, the heel of the heel in the direction of the hypotenuse 5R (FIG. 1) passing through the substantial center of gravity V (FIG. 13) will be described later. The load is carried. As a result, the "knee bending effect of the heel" as described in the conventional example shown in FIG. 20 is reduced.

In this embodiment, the decorative heel shape forming member 4b is easily deformed by enlarging the space 4C. Even if the decorative heel shape forming member 4b is made of the same material as the heel portion supporting elastic member 4a, the above-mentioned void 4C is formed.
Instead, it is also possible to increase the number of recesses, perforations, or air bubbles (not shown) to facilitate deformation. In addition, the heel portion supporting elastic member 4
It may be formed of a material softer than a. It is preferable that the rear side from the position indicated by the symbol e in FIG. 3 (a) is formed as an ascending slope d1 so as to be slightly elevated so as to be separated from the ground. Further, as a modification, as shown in FIGS. 8A and 8B, the inclined portion d2 may be formed by cutting back from the rear end e of the heel portion supporting elastic member 4a.

FIG. 16 is a view for explaining the operation of the decorative heel shape forming member 4b shown in FIG. 15, and for the sake of explanation, the space 4c (FIG. In FIG. 16, 15) was filled with the material 4h.
If there is no void 4c when descending a slope under the same conditions as in FIG. 15 or landing with the toes raised, the reaction force of the arrow A from the harmful ground described in the conventional example occurs at the 4h portion, and the knee joint Give a shock to the affected area.

In FIG. 15, a large space 4 is provided as compared with FIG.
c is easily deformed, and the reaction force received from the ground is small. Such an effect is effective not only when descending a slope but also when a patient's walking habit lands on a toe. If the appearance is not desired for an ideal function, it is better not to have the decorative heel shape forming members 4b and 4h. Further, even if the hollow portion of the decorative heel shape forming member is filled with an elastic material as shown by 4h as shown in FIG. 16, the notch of the heel is formed at a steeper angle as indicated by a chain line d-d. If this is done, the rear part from the rear end e of the bottom of the heel is substantially lacking in the rear, which is a bad design, but an effect similar to the "support effect close to the vertical line" can be obtained.

However, there are large individual differences in the patient's medical condition, and there are also cases where comorbidities occur together. For elderly patients who lack the ability to stand up and cannot stand up satisfactorily, as shown in FIG. 16, the structure in which the rear portion 4h of the heel is filled may be used to compensate for the insufficient ability to stand up. Even in the case of such a structure as shown in FIG. 16, since the heel portion supporting elastic member 4a is formed of a sufficiently soft elastic material in the present invention, the substantial supporting point is positioned forward, and accordingly, Although not so clear as the above-mentioned "supporting effect close to the vertical line", a similar effect can be obtained.

In each of the above-described embodiments and modifications, the lower surface rear end e of the heel portion supporting elastic member 4a that substantially supports the weight.
Is located at a position advanced from the rear end of the shoe body. This position is at least 5% of the total length of the shoe, preferably 6% to 7% or more, measured from the rear end of the shoe. In this embodiment, the rear end e of the heel portion supporting elastic member 4a is set at a position 10% advanced from the rear end of the shoe body. in this way,
The fact that the rear end e of the heel portion supporting elastic member 4a is set to be advanced is effective in further enhancing the "non-flexion effect of the knee joint". That is, as a result of the rear end e being provided forward, the hypotenuse R4 (FIGS. 1 and 23) approaches the vertical line.

The rear end E of the heel shown in FIG. 17 as a prior application is made of a hard material and has an angled corner, and at the moment of landing, only the rear end E carries a concentrated weight. However, on the contrary, in the embodiment shown in FIG.
Since a itself is formed of a soft material, the square shape of the rear end e shown in FIG. 1 is actually deformed flexibly even if it looks angular, but rather the heel portion supporting elastic member. Since the weight is carried by the whole 4a, it is considered that there is a substantial supporting point in front of the angular rear end e shown in the figure. It may be considered that the supporting point exists near the center of gravity V of the heel portion supporting elastic member 4a as shown in FIG. Assuming the hypotenuse 5 that passes through the center of gravity V, the hypotenuse R5 passes the hypotenuse R4, as shown by the dotted lines in FIGS.
Get closer to the vertical line. The estimation of the angle of the hypotenuse R5 is not definite, but at least the hypotenuses R1 and R shown in FIG.
It can be expected that passing through 2, R3 or R4 and approaching the vertical line χ-χ is certain.

In this way, the lower surface rear end e of the heel portion supporting elastic member 4a, which is a substantial heel, is advanced further than the rear end of the shoe main body, and the above-mentioned oblique side R5 becomes the above vertical line χ-χ. When the weight is further approached, the weight is supported at a position advanced from the rear end of the shoe main body, and the best condition of the above-mentioned "support effect close to the vertical line" is obtained, and the harmful force of the arrow A (Fig. 20) is exerted. Therefore, it is possible to prevent the "knee bending effect of the heel" in the direction of the arrow B more sufficiently.

If the bottom cover member 3c is omitted, each member such as the balance member, the heel portion supporting elastic member 4a, the decorative heel 4b, or the like formed by the above-mentioned structure, or a space between them, Since the recess is exposed and unsightly, by filling it with an elastic material having an elastic force lower than that of other portions, it is possible to adjust the appearance and prevent a strange appearance.

In the embodiment of the present invention, the "lower knee flexion effect" is sought to bring the lower part of the calcaneus close to the vertical line χ-χ so that the toes are lifted from the ground. Since the "natural shock absorption function" is lost due to the loss of the spring of the arrow A or the arrow B described in the "Prior Art" section, the bottom material rear region 4 compensates for this by the human heel at the heel. The height of the surface in contact with the lower end of the is designed to drop under the above load, and absorbs the impact at the start of landing. Its shock absorbing function is special, and it requires a completely different function from the shock absorbing function of sports shoes. That is, the patient has a knee ailment and is enduring the pain, and therefore walks quietly and lands with a load almost equal to a static load as compared to a person who sports. It is preferable to protect such a weak patient positively and provide a shock absorbing mechanism to a patient who suffers from pain in a step-by-step manner so that he / she can land more gently than a healthy person. On the other hand, a sports shoe or the like is subjected to an acceleration load to which a speed is applied, and receives a strong load such as four times the gravity when jumping. Sports
Since the shock absorbing mechanism of the shoe is designed to have a structure that elastically deforms by such a strong force, it cannot sufficiently elastically deform when the patient is quietly landing.

The elastic deformation referred to here means that the elastic deformation is caused by a load that can substantially contribute to carrying weight. An extremely weak force that cannot be said to carry weight, for example, a layer of material that may be deformed even by one-200th of its weight may be laid inside the shoe. For example, "cotton"
The presence of an extremely soft material layer such as a “fluff” or an extremely soft sponge-like material layer causes an excessive illusion of the numerical value of deformation, which is harmful. Excluded from the definition of. For example,
When a fluffy material such as "cotton" described above is used for the insole and is soft so that it can be easily dented by a finger, a numerical value that is deformed by such a weak force is excluded in the present invention. Shall be calculated. In other words, a fluffy material is used, for example, with a slight load such that the descending dimension of the surface of the upper layer member (described below) carrying a weight of 70 kg (described below) is less than 1/200 (350 g / 1 cm ² ) of the body weight. The numerical value of the deformation in the case of deformation is excluded from the numerical value described later showing the correlation between the elastic deformation function of the weight-bearing elastic member and the carrying load. Therefore, the shock absorption function described in the following sections is not the weak one described in this section,
The present invention relates to a weight-bearing mechanism that actually absorbs impact while absorbing weight.

A structure for gently landing the patient by the above-described shock absorbing function will be described below. That is, the heel portion supporting elastic member 4a is formed of a material that is easily elastically deformed, and is deformed from the state of FIG. 3 (a) to the state of FIG. 1 by a load. As a material that is easily elastically deformed, E.I. V. A soft foam material called A (ethylene vinyl acrylic) resin was used. In order to test how soft it was, 10 mm × 10 mm × 10 mm of this material was sampled, inserted between the fingers and pressed, and could be easily compressed to a quarter. This is exceptional softness as a heel material.

Comparing the elasticity of this material with the elasticity of the heel region of a sports shoe, the heel of a sports shoe that can withstand four times the gravity is easy to handle under such a weak static load. In principle, it does not elastically deform. In the present invention, the heel portion supporting elastic member 4a starts to come into contact with the ground at the moment of contact with the ground where the weight is not yet applied, and when the weight is fully loaded, the weight bearing is carried by the fulcrum 5 (in other words, For example, since the load on the heel supporting elastic member 4a is reduced by moving to the balance member 8), the heel supporting elastic member 4a can be formed of an abnormally soft material as described above contrary to the common sense of shoes. is there.

Further, when the upper layer member 9 provided inside the shoe body is also formed of an elastic material, the surface 9a for receiving the calcaneus of the human is slightly recessed to help absorb the impact. As shown in FIG. 10, which will be described later, it is effective in shock absorption because it is considerably thick on the high slope side. The examples shown in FIGS. 1 and 2 show an example in which the upper layer member 9 is formed of an elastic material, and the descent of a human foot is measured by the descent on the surface 9a of the upper layer member 9 located at the lower end of the heel. .

In each of the embodiments described later, the elastic material for shock absorption may be partially replaced with the shock absorbing material, if necessary.

It is desirable that the heel portion 9a on the surface of the upper layer member 9 has a shock absorbing function capable of compensating for the loss of the "natural shock absorbing function" possessed by humankind as described above.
The material of a is sufficiently elastically deformable, and for example, the static load applied to the surface 9a of the heel lower end of the upper layer member 9 is 7
In the case of 0 kg, the total length of the shoe is 250 mm, and the descent dimension is set to 12.5 mm in the embodiment, which is 5% of the total length of the shoe. 2%, 3%, 4 of the total shoe length
% And 5%. The larger the descending dimension is, the better the shock absorbing function is, but if it is too large, walking becomes unstable. Patients say that at least 2% or more, preferably 3% or more, and 5% in this example, gives almost satisfactory shock absorption. Based on the results of trying 20 patients at the time of filing this application,
Since the walking habits of patients are various and the medical condition is light and heavy, each descent size should be selected depending on what kind of patient and what medical condition is targeted.

As described above, the upper layer member 9 made of an elastic material greatly contributes to shock absorption. Therefore, naturally, in the embodiment, the upper layer member 9 is made of an elastic material, and the numerical value of the descent is also shown by the descent value on the surface of the upper layer member 9a at the lower end of the heel.
However, the upper layer member 9 is a replaceable insert material having a special shape for a special purpose, and in the distribution stage, the upper layer member 9 may be handled separately and in a replaceable state. When it is distributed without the upper layer member,
Since the descent function cannot be indicated by the descent value of the surface of the upper layer member 9 of the heel, it may be measured at the rear end of the bottom material upper surface instead. In that case, since the upper layer member 9 itself lacks the compressive deformation, the numerical value becomes smaller accordingly. As in the case of the previous item, at least 1 of the total shoe length with a load of 70 kg applied
% Or more, preferably 1.5% or more, and in this example, 2.
It was set to 0%. However, this value is for an unfinished product lacking the upper layer member.

Further, in order that the heel portion supporting elastic member 4a may be deformed more easily than the balance member 8, a difference is provided in the easiness of elastic deformation between the heel portion supporting elastic member 4a and the balance member 8, but this difference is It should be formed by at least one of the difference in the size or number of the shapes of the bubbles, the perforations, the cavities, and the recesses, and the difference in the cross-sectional area or the material.

FIGS. 5 (a) and 5 (b) show modified examples in which the structure is simplified in order to reduce the manufacturing cost. In this modified example, the bottom member front elastic member 3, the balance member corresponding portion 3b, and the heel portion supporting elastic member 4a are made of the same material, and the hardness of the material is larger than that of the above-described embodiment. In the figure, the balance member corresponding portion 3b is integrally formed of the same material as the heel portion supporting elastic member 4a. However, there is a difference in elastic force between the balance member corresponding portion 3b and the heel portion supporting elastic member 4a due to the difference in cross-sectional area. In other words, the balance member-corresponding portion 3b is formed without providing a cavity, whereas the heel portion supporting elastic member 4a has a smaller cross-sectional area due to the cavity 4C, 4M. Therefore, the portion 3b corresponding to the balance member is not elastically deformed as compared with the heel portion supporting elastic member 4a. However, in this case, some deformation is inevitable because the material is not for a full scale member. In order to compensate for this, it is desirable to reinforce by using the reinforcing member 6 having sufficient strength. Further, in the modification of FIG. 5, the portion of the fulcrum 5 is likely to be dented due to the load, and the fulcrum moves as the legs advance, and the fulcrum 5 moves forward to make walking difficult. There is a limit to lowering the hardness (the adverse effect of the movement of the fulcrum will be described later).

FIG. 4 shows another modification, in which the bottom surface of the bottom portion of the rear region of the bottom member is substantially linear or recessed between the rear end and the fulcrum when viewed from the side when loaded. Is preferred. For example, this modification is an example in which the bottom surface of the bottom member rear region is slightly recessed upward. If it is unavoidable to form a loose downward protrusion for the convenience of design, this bottom material rear region is formed with bubbles, perforations, and voids so that it is easy to become substantially linear when viewed from the side when loaded, although not shown here. If at least one of the place, the recess, and the soft material is provided to facilitate the depression, a linear shape is obtained as a result. As described above, this portion should be formed substantially linearly as shown in FIG. 3 (a), or should be formed so as to be recessed upward as shown in FIG. 4, or to be easily recessed upward. Therefore, at the start of landing, as shown in FIG. 1, both the rear end of the lower surface of the bottom member rear region and the fulcrum 5 are in contact with the horizontal line and are stable in the front-rear direction, and never swing back and forth. This is a significant difference from the conventional rocker shoe.

FIG. 2A shows the “second state”, and FIG.
The weight gradually shifts from the landing start state "first state" of the human body, and the weight is supported by the fulcrum 5 at the front end of the lower surface of the heel region. The weight is mainly the human heel 20 and the metatarsal head 30. The balance member 8 is supported by the balance member 8 in a balance-like manner, and the load is concentrated on the fulcrum 5. Unlike ordinary shoes, for example, a patient weighing 70 kg can support a total weight of 70 kg in a balance-like manner, and the balance member 8 connects the front part of the heel 20 and the front part of the metatarsal bone 40 so as to endure it. Form a balance.

Further, in the present embodiment, the position of the fulcrum 5 is set at a distance of 50% with respect to the entire length of the shoe main body as measured along the line connecting the center of the calcaneus and the head of the second metatarsal bone. . In addition, the ridgeline formed by this fulcrum 5 on the bottom surface of the bottom material is line 5-
As shown by 5, the little finger side is formed to be advanced as compared to the thumb side (described later).

The position of the fulcrum 5 is 50% of the entire length of the shoe body, measured from the rear end of the shoe body parallel to the second metatarsal bone. If the doctor explains the function to the patient well, the patient understands this well, and can walk properly from the heel, 40% is sufficient. However, there are some patients who do not understand the doctor's explanation and erroneously perform “walking on the toes” as shown in FIG. 19 (conventional example). It was more common in younger and more muscular patients. In order to eliminate the existence of such misused patients, fulcrum 5
Was set to move forward. Set the position of the fulcrum 5 to 41
%, 43%, 45%, 47%, but the presence of misused patients decreased as the value increased. Therefore, the position of the fulcrum 5 was tried to be 56%, 58%, 61% and 63%. As a result, as the number increases, the number of abusers decreases and the knee extension effect increases, but as the number increases, the knees are forcibly stretched, and the number of patients complaining of ease of fatigue increases in proportion to the increase in the number. Even if the patient puts it up 6
If it exceeds 5%, it is often refused to wear. The position of the fulcrum 5 is determined depending on what kind of patient is targeted. If an average value design that can be shared by various patients is tried, it is safe to set the position of the fulcrum 5 in the range of 42% to 60%, and 44% to 5%.
If the range was set to 7%, fewer patients would complain, and if the range was set to 46% to 55%, almost no complaints were issued. Therefore, in this example, the position was set to 50%, so that it was well received by many patients.

FIG. 3 (c) is a view of the shoe of this embodiment seen from the sole. In the structure of a general shoe, the floor separation point at which the front part of the shoe sole curves upward and separates from the ground, the floor separation point on the little finger side compared to the floor separation point on the thumb finger side measured from the rear end of the heel ( It is short (because the shortest on the little finger side), and is located backwards.
On the contrary, in this embodiment, the position of the fulcrum 5 is as shown in FIG.
As shown by a line 5-5 in (c), the fulcrum 5 forms a ridge line 5-5 that crosses the bottom surface of the bottom material, and this ridge line is positioned with the ridge line on the little finger side advanced as compared to the ridge line on the thumb side. There is. In other words, a line P perpendicular to the chain line V-V connecting the center of the calcaneus and the second metatarsal bone
The ridgeline on the little finger side with respect to −P is positioned at a forward angle with an inclination compared to the ridgeline on the thumb side. This angle is set to at least 2 degrees or more, preferably 4 degrees or more, preferably 6 degrees or more, and 10 degrees in this embodiment. The theory that led to such setting was discovered during the experiment of the present invention. As will be described later in the third embodiment, the theory is to reduce the push-up action from the ground that the affected side of the knee joint receives. That is, when the legs gradually move and the balance member 8 leans forward, the weight is supported more on the little finger side where the ridge line travels forward, and less on the thumb side where the ridge line recedes. This has the effect of maintaining the force E (described later) that pushes down the affected side (thumb side) of the O-leg patient.

FIG. 2 (b) shows the "third state", in which the weight of the human gradually shifts from the "second state" supported by the balance as shown in FIG. The figure shows a state in which the second metatarsal head 30 is supported by a substantially straight line portion between the bottom material lower surface 7 and the fulcrum 5.

Since the position of the fulcrum 5 is almost in the center of the entire shoe and the foot is supported in a balance-like manner, the movement from the "second state" to the "third state" merely involves tilting of the balance. It operates and has little resistance.

The reason why there is little resistance to the movement from the "second state" to the "third state" is that the bottom material lower surface 7 of the metatarsal head and the fulcrum 5 are as shown in FIG. 2 (b). Seen from the side, they are tied in a substantially straight line, and are shown in Figures 2 (a) to 2 (b).
This is because there is no resistance in moving to the state of. If, as shown in FIGS. 6 (a) and 6 (b), the space between the lower surface 7 of the bottom material of the metatarsal head and the fulcrum 5 is formed into a curve 5f that projects loosely from the side, the shoe Although the design is good, the functional front is a loose roller as shown in Fig. 6 (b).
Functioning like, the ground contact point moves to the front 5f while rolling in a roller shape, and when it rolls, it moves further forward.
This movement of the ground contact point like 5f means that the fulcrum 5
Will have the same effect as moving and will make walking difficult. Originally, the position of the fulcrum 5 was 41 as described above.
The position is set to the best position that the doctor considers to be the most appropriate by referring to the request from the patient and the medical condition of the patient in the range of% -65%, and it is preferable that this best position is never moved. For that purpose, the space between the bottom material lower surface 7 where the second metatarsal head 30 is located and the fulcrum 5 is seen from the side when loading,
The shape is preferably substantially straight or recessed upward. FIG. 7 shows a modified example in which the shape is thus recessed upward. In addition, as will be described later, when it is unavoidably necessary to form a loose downward protrusion for the sake of design, the bottom material bottom surface 7 of the metatarsal bone head and the fulcrum are dented by the load so that the straight line tends to become as shown in FIG. At least one of bubbles, perforations, cavities, recesses or soft materials may be provided between the above and 5 so as to make it easier to dent (described later, the next item). Since it is not deformed, the above-mentioned portion which is easily recessed is compressed by the load and deformed linearly, and the movement of the fulcrum can be prevented. in this way,
When the space between the bottom surface 7 of the bottom material and the fulcrum 5 is substantially changed to the state of FIG.
In both of the case of forming the shape of (b) and the case of forming the shape recessed upward as shown in FIG. 7, the “first state” to the “second state” are followed by the “second state”. It has been confirmed by an experiment with a sick person that the transition to the “third state” is an easy operation simply by changing the inclination of the balance.

As shown in the figure, the fulcrum 5 is functionally required to form a corner so as to act as a fulcrum. Although this corner is a blunt angle, it is still more prone to wear than other parts. In order to prevent this, even if the corner is slightly cut (cornered corner), there is no problem as long as the function as a fulcrum is not lost.

The state shown in FIG. 2 (b) is similar to the state in which the balance member 8 is tilted forward and the shoes of a normal high heel are worn, and compared to the first and second states. The heel is slightly raised. This state is the opposite of the state in which the Achilles tendon was forcibly pulled as described in Conventional Example 1, and the gradual next "fourth state" was performed without pulling the Achilles tendon.
You can move to (kick off). In this way, the "third state", in which the Achilles tendon is not pulled but is ready to be easily moved to the "fourth state" (kicking out), is hereinafter referred to as "high heel type bed preparation state". The present invention is based on the principle of lowering the heel. Such low heat
The "high heel type bed preparation state" that made it possible to pull the Achilles tendon forcibly even though it is a leg is a habit of bending implantation of the knee that is seen in ordinary patients with knee osteoarthritis, in other words, of the Achilles tendon. It prevents or corrects the development of bad implantation habits such as prolongation, thereby preventing the progression of the disease and reducing pain.

FIG. 2 (c) shows the "fourth state", in which the weight of the human gradually moves from the "third state" in FIG. 2 (b) to kick the ground with the fingertip. At this time, the void 3f is provided to facilitate bending of the bottom material, and flexibly bends to facilitate kicking out.

[Behavior of Shoes of the Present Embodiment] The behavior of the shoes of the above-described embodiments will be described. When the landing is started, the lower surface of the heel area is shown in the "first state" in FIG. Like the second
The bottom material bottom surface 7 of the metatarsal head is lifted from the horizontal line, and the height of the bottom material upper surface is extremely lowered rearward, and the line connecting the center 50 of the ankle and the calcaneus lower end d (the hypotenuse R4 shown in FIG. 1). )
Approaches the vertical line χ-χ, and as shown by the symbol d in FIGS. 1 and 23, the calcaneus lower end d is positioned as close to the vertical line as possible. The position of this d is a low position that passes through the position c (FIG. 23) of the shoe with the extremely low heel described above, and as described in [Problems to be Solved by the Invention] By reducing the value of D represented by the distance D = R sinα, it is possible to reduce the bad force applied to the knee “the knee bending action of the heel”. (This is called the "support effect that approaches the vertical line").

When the landing is started with the tip of the toe raised (the front of the foot floating in the air), another effect is produced. In FIG. 1, when the force that lowers the heel acts as an arrow G, and thus acts to lift the bottom material of the metatarsal head into the air, this is the same as the above-mentioned harmful landing impact (arrows A and B). The force is exactly opposite in direction. Therefore, the force of arrow G is a harmful landing impact (arrow A,
It acts to antagonize or push back the force of B) to generate a beneficial force at the start of landing. The "toe raising effect" produced by the force of this arrow G acts as a supplementary effect to the main effect of the above-mentioned "support effect close to the vertical line", and acts synergistically to generate a "knee extension effect". Can be made.

On the other hand, in order to compensate for the loss of the natural human impact absorption function that has been lost due to the above-mentioned "knee joint non-flexing effect", this embodiment provides a special impact absorption means to provide a special impact absorption function. For patients in a situation,
It is possible to provide a shock-absorbing function that is gentle to the sick and weaker than the natural shock-absorbing function that humans have, while providing an extremely appropriate shock-absorbing power, and further increase the above-mentioned "toe lifting effect". You can

Next, as shown in FIG. 2 (a), the state is shifted to the balance-like state "second state" and the entire weight is carried. At this time, the balance member formed on the bottom member can support the weight like a balance, and the weight can be moved smoothly. In addition, in the state of this embodiment, the fulcrum 5 is located at a position approximately half of the total length of the shoe, so that the mechanical load is small, and even a physically handicapped person with weak leg muscles can easily change from the "first state" to this state. It is possible to shift to the “third state”, and by making the bottom material from the fulcrum 5 to the bottom material lower surface 7 where the metatarsal head is located substantially straight, there is no resistance and the next “ Third state "
You can move to.

FIG. 2B shows the "third state", in which the weight is supported by a substantially straight line portion between the bottom surface 7 of the metatarsal head and the fulcrum 5. In this "third state", the state approaches that of wearing a normal high-heeled shoe, and the state in which the Achilles tendon is pulled as described in [Problems to be Solved by the Invention] is released. In this way,
The state of FIG.
The unreasonable stretching of the Achilles tendon at the time of leaving the bed does not occur as in No. 8, and the conventional harmful effect of stretching the Achilles tendon does not occur even if it is continuously used. Not only that, but according to the present invention, the ideal lifting angle in the first state can be freely designed to an appropriate value without concern about the adverse effect of the excessive pulling of the Achilles tendon. This gives the ideal therapeutic effect. In this "third state", the heel is in a raised state, which facilitates the transition to the next bed leaving step "fourth state". In this way, the above-mentioned "high heel type bed leaving preparation state" in which the heel is raised to facilitate the transition to the next "fourth state" is achieved. Further, the O-leg can be corrected by advancing the little finger side of the ridgeline formed by the fulcrum 5.

FIG. 2 (c) shows the "fourth state", in which the weight of the human gradually moves from the "third state" in FIG. 2 (b) to kick the ground with the fingertip. At this time, the void 3f is provided to facilitate bending of the bottom material, and flexibly bends to facilitate kicking out.

Example 2. In the first embodiment, the upper layer member 9 is made of an elastically deformable elastic material. However, in order to obtain the balance mechanism, as shown in FIGS. 8 (a) and 8 (b) as another embodiment, The upper layer member 10 may be formed of a material that does not elastically deform, and the upper layer member 10 may serve as the balance member 8 (FIG. 1) described above. In FIG. 8A, the balance member 12 is formed by the pillar member 11 that does not substantially elastically deform and the upper layer member 10 that does not substantially elastically deform. As the shock absorbing mechanism, the rear end of the upper layer member 10 is separated from the bottom member to form the space 10a, and the heel region is elastically deformed, as in the case of FIG. In this embodiment, instead of providing a decorative heel shape forming member described below, a substantial heel is formed.
The rear end e is cut out obliquely so as not to interfere with the rear end, and this portion is formed as a slope d2.

In the case of this embodiment, the balance member 8 shown in FIG.
Corresponds to the upper layer member 10 and the column member 11 in FIG. 8, and therefore, FIG. 1 and FIG. 8 (a) have the same balance function. In a state where the load is applied, as shown in FIG. 8B, the upper layer member 10 dents the bottom member 3d and descends, and further the rear portion 10b of the upper layer member 10 descends to reduce the space 10a. It is designed to absorb shocks. In this embodiment, since the upper layer member 10 does not elastically deform, there is a drawback that it does not fit to the foot, but in order to eliminate it, the surface contacting the foot is formed with an elastic material not shown so as not to impair the balance function. It may be elastically deformable.

As described above, since the balance mechanism is obtained by the upper layer member 10 and the strut member 11 which are not substantially elastically deformed, the balance member 8 and the upper layer member 9 shown in the first embodiment also serve as the upper layer member 10. Therefore, it is possible to obtain the same effect as that of the first embodiment.

Example 3. In the above-described first embodiment, the treatment means is accompanied by "correction of the axial line in the anterior-posterior direction" as will be described as representative of the "knee joint non-flexing effect" and the "knee extension effect". On the other hand, on the other hand, as described later, “correction of the axis line in the left-right direction” is effective, and in addition to the correction in the front-rear direction described in the first and second embodiments, a third embodiment described later is also performed. Further, when both the means for correcting the right and left directions described in Example 4 are synergistically, the "synergistic effect" of the both can dramatically improve the therapeutic effect on the knee osteoarthritis patient.

In the third embodiment, in addition to the first embodiment or the second embodiment, a slope inclined to the left and right is provided in the upper layer of the bottom material, whereby upper and lower bones (femur and tibia) connected to the knee joint. Corrects the left and right axial directions of the O leg (or X leg)
Correct the left-right axis of the patient. Although the treatment by the correction of the axis line in the left-right direction is known, in reality, the satisfactory effect cannot be obtained only by correcting the axis line in the left-right direction, and the present invention solves it.

FIG. 9 is a plan view of the upper layer member 9 shown in FIG. 1, and FIGS. 10 (a), 10 (b), and 10 (c) are sectional views taken along the line aa and bb of the upper layer member in FIG. The cross section and the cc cross section are shown. As shown in FIG. 10, the surface of the upper layer member 9 is inclined so as to be lowered from left to right when viewed from the rear, and an inclined surface is formed so that the affected side direction of the joint of the patient is low.

Further, in order to prevent the human foot from sliding sideways toward the lower side of the inclined surface and pushing and bending the upper, the lower side of the upper than the upper side is strengthened with a reinforcing material (not shown). Strengthened.

The reason why the inclined surface is formed is well known, and the explanation will be concise. However, as an example in the case of osteoarthritis of the knee, a description will be given with reference to a varus knee (O leg, crab crotch). As shown, the axial direction aa is bent,
111 inside the joint rather than the cartilage 105 on the outside 112 of the joint
Received a lot of load, the cartilage was worn and lost, and the affected part 106
And the bones are exposed. As a means for correcting this, a slope is provided in the shoe, and the lower side of the shoe lowers the inside of the joint as shown by the downward arrow E to generate the force of the arrow F as shown in FIG. Is shown in FIG.
Try to correct the axial direction and release the affected area from the load as shown in. Although the effect can be recognized even by this method, it cannot be corrected as desired, and the effect is not satisfied only by this means, and the problem is solved in the third embodiment.
And Example 4 below.

Although the example of the valgus knee has been described above, in the case of the valgus knee, the outside is read as the inside and the inside is read as the outside in the above description, and the inclined surface is also inclined in the opposite direction. Is omitted.

In this embodiment, the upper layer member 9 forms the inclined surface, but the upper layer member 10 may form the inclined surface, or the upper surface of the bottom member may be inclined to form the inclined surface.

When the upper layer member 9 shown in FIGS. 9 and 10 is made of an elastic material, for example, E.
V. A foamed resin is used. In this case, the elasticity of the upper layer member 9 acts in cooperation with the above-mentioned heel portion supporting elastic member 4a, so that the action is under the same superordinate concept. However, there are functional differences between the two.

The elasticity of the heel portion supporting elastic member 4a is, for example, 7
Strong elasticity to withstand a load of 0 kg is required. This requirement is strong elasticity, for example, to absorb the impact of rails and wheels in railways. Therefore, walking above 70k
Sufficient elastic deformation only when g weight is applied. However, it is desirable that the upper layer member 9 be deformed with a weaker force (for example, 1 kg) like a vehicle seat. The reason is that since the weight of 70 kg is not yet loaded at the moment when landing is started, the heel part supporting elastic member 4a having strong elasticity is not deformed, and the upper layer member 9 which is deformed by a weak force is momentarily landed. Absorb the initial tremor of. The initial tremor at the moment of landing is the most painful point for patients with knee pain. Even if the weight of 70 kg is applied as a static load after the moment of landing, the effect on pain is small.

However, the upper layer member 9 is required to have the above-mentioned function of maintaining the shape of the slope in addition to the function of absorbing the initial fine movement, and the slope should not be deformed by losing the weight.

Therefore, for example, it is required to have both the softness that elastically deforms even with a light initial impact of 1 kg and the strong shape-retaining function capable of withstanding a heavy static load of 70 kg and retaining the shape.

The upper layer member 9 of the third embodiment shown in FIG. 9 has an inclined surface as shown in FIGS. 10 (a), 10 (b) and 10 (c). In this case, since the area of the upper layer member 9 in contact with the human foot is significantly larger than that of the heel portion supporting elastic member 4a and the load per unit area is small, the upper layer member 9 is attached to the heel portion supporting elastic member 4a. Less elastically deformed.

Further, in order to have both the above functions, FIG.
It is also possible to use a modified example in which the portion indicated by the area Q in FIG. This area Q is an area that receives a strong pressure from the calcaneus and is a portion that receives the load immediately at the initial stage of landing, and a small initial impact can be absorbed by this specially provided area Q. Compared to other regions, this region has a large number of air bubbles (not shown in FIG. 9), so that the lower end of the human heel (for example, 2 cm ²
The area of the upper layer member 9a is softened so as to easily start elastically deforming. However, instead of the large number of bubbles, perforations, voids, and recesses may be provided to soften the upper layer member 9a.
Alternatively, the region Q may be formed using a material that is softer than that of the upper layer member 9.

With this structure, it is possible to maintain the shape-retaining function of forming the inclined surface and at the same time absorb the weak initial movements of the landing, thereby preventing the most feared pain at the moment of landing of the patient.

Further, since the upper instep on the lower side of the inclined surface is reinforced with the reinforcing material as compared with the upper instep, it is possible to prevent the human foot from slipping toward the lower side of the inclined surface. .

Example 4. In an experiment using the shoes of Example 3, a scene was encountered where the effect of the inclined surface was not obtained unexpectedly, but at that time the cause was unknown. While investigating why the expected effect was not obtained, it was found that the cause was as follows. That is, since the heel portion supporting elastic member 4a is formed of an extremely flexible material, the heel portion supporting elastic member 4a that supports the high side of the inclined surface is the heel portion supporting elastic member that supports the low side of the inclined surface. It received a larger load than the member 4a and was compressed a lot and dropped. As described above, when the high side of the inclined surface descends more than the low side, the force of the arrow W opposite to the arrow E shown in FIG. 12 is generated, and the axis a- in the bad direction shown in FIG. 11 is generated. A force that bends a is generated. Although this phenomenon is not noticed without careful observation, it has been noticed that this is a fatal phenomenon in the case where the heel portion supporting elastic member 4a is made of an especially soft material. In this way, the heel portion supporting elastic member 4a
The phenomenon in which the heel-supporting elastic member on the high side of the inclined surface descends a lot without being evenly descended from side to side is hereinafter referred to as "heel uneven descent phenomenon".

In this embodiment, the above problem is solved as follows. FIG. 13 shows the bottom cover of the bottom part of the shoe of this embodiment.
It is a horizontal cross-sectional view which cut | disconnected the bottom material along the material 3c at the height of 1 mm above from the upper surface of the bottom cover material 3c. In the figure, the heel portion supporting elastic member 4a has a small cross-sectional area on the affected side 4n and a large cross-sectional area on the opposite side 4r. In other words, the void 4L on the affected part side is made larger than the void 4R on the opposite side. Therefore, the affected area is compressed even with a weak pressure. In other words, by adjusting the cross-sectional area, the cross-sectional area of 4n and 4r
By providing a difference in the cross-sectional area, the force in the bad direction described in the preceding paragraph is prevented from acting to bend the axis aa. The space 4L should be expanded in the direction of the arrow w so that the cross-sectional area of the bottom material 3 (the heel-portion elastic member 4a in a broad sense) is substantially smaller than that on the 4R side (in the narrow width portion N). Is preferred. The above is an example in which the size of the void is provided differently, but instead of the size of the void, not shown, a recess,
The size or number of bubbles, perforations, etc. may be provided to facilitate the descent on the affected area side. Also, as shown in FIG. 14, even if the heel portion supporting elastic member 4a is made of a material S which is elastically deformed (soft) on the affected part side with a weak force, and is hard to be elastically deformed (hard) on the opposite side. Good. Further, an intermediate material band (not shown) may be provided between the materials S and H. Also, these means may be used together. Note that if a partially narrow portion N is formed as shown in FIGS. 13 and 14, the bonding area between the instep and the bottom material becomes insufficient in the manufacturing process, and therefore the adhesion area (width) with the instep is 4R side. A softer material than the N portion may be added to the N portion to compensate for the narrowness, to the same extent.

By thus forming the heel portion supporting elastic member 4a and forming the heel region, the "soft heel supporting elastic member" which is the basic constitution of the present invention is used to support the weight and "natural". Of the impact absorption function of ", while preventing the occurrence of the above-mentioned" unequal descent of the heel "that occurs inevitably by providing the left and right inclined surfaces in that case," The tilt angle can be properly maintained.

Example 5. In this embodiment, the design of the impact absorbing function of the heel portion supporting elastic member 4a is allowed at the same time while preventing the occurrence of the above-mentioned "heel uneven descent phenomenon". If the elasticity of the heel-supporting elastic member 4a is set according to the weight of each person, the weight of the person varies, so that it is necessary to prepare a large number of types of merchandise. . If you try to avoid multiple products and force them to unify and design by relying only on the average value, and then release it as a product, you will not be able to adapt to the variety of human weight above, so the shock absorption function. May not be enough. For example, a person with a heavy weight of 70 kg loses a sense of stability due to an excessively large descending dimension, while a person with a light weight of 35 kg, for example, has a small elastic deformation and a small descending dimension, resulting in an insufficient impact absorbing function.
If feasible, it is desirable that even lighter weight people fall, and that even heavier people fall too little.
The present embodiment relates to a structure that can solve the problem and can stably prevent the occurrence of the "heel uneven descent phenomenon" from side to side.

FIG. 24 (a) is a heel portion supporting elastic member 4a near the portion 9a (FIG. 1) of the upper layer member 9 in contact with the lower end of the human heel.
The cross section of (including the bottom cover member 3c) is shown. In the drawing, the shape of the grounding surface below the heel portion supporting elastic member 4a is located between both side portions 4S which are respectively located laterally and contact the ground when viewed from the rear, and between the both side portions 4S. It is formed with an inner portion 4h that does not substantially contact the ground. The inner portion 4h may be completely recessed as compared with the both side portions 4S, or even a substantially recessed portion may be formed with a weak projection that is easily deformed and easily deformed by compression with a load. For example, in the case of a light person weighing 35 kg,
Since both side portions 4S have a small ground contact area, they are first fully deformed and compressed, and absorb the landing impact of a light-weight person. After deformation, it has a flat bottom surface as shown in FIG.
As a result, when the inner portion 4h is in contact with the ground, the weight is supported by a large total area of the inner portion 4h and both side portions 4S (eg, four times the ground contact area in the case of FIG. 24 (a)). Therefore, since the carrying force is large and is not easily deformed, the impact is absorbed with a force capable of withstanding a heavy weight, for example, 70 kg. In other words, in the initial stage of landing, both side portions 4S having a small area carry weight, and since the area is small, they are easily deformed and are crushed in the first place. For a heavy 70 kg person and a light 35 kg person, However, in common, it easily elastically deforms and absorbs landing impact. continue,
In the case of a heavy weight person, the weight is carried in a large area as shown in FIG. 24 (b), and the area is, for example, 5 times as large as that in the case of FIG.
Even in the case of a heavy person, the size of the descent does not become excessive. Also, the right and left inclined surfaces, which is the fate of the present invention (Fig. 10)
The instability in the left-right direction due to the uneven load on the left and right is strongly supported on both sides (both ends), so that even if there is some unevenness on the ground, it is stably supported on the left and right.

The side 4S carrying the high slope side 9H provided on the upper layer member has a larger horizontal cross-sectional area or a larger hardness than the side 4S carrying the low slope side 9L, so that the above-mentioned "hidden" It is preferable to prevent the occurrence of the "unevenly descending phenomenon of the le".

As described above, according to the fifth embodiment, "hi
While preventing the occurrence of the "unevenly descending phenomenon of the heel", at the same time, the design of the impact absorbing function of the heel portion supporting elastic member 4a is tolerated, and the heel portion supporting elastic member which should be originally designed according to the weight of each individual, It can be designed to be used by a heavy person and a light person.

Example 6. 25 and 26 show an embodiment having the function of each of the above-mentioned embodiments and having an instep covering close to a hook or slippers so as to be easily put on and taken off. FIG. 25 is a vertical cross-sectional view showing the footwear of Example 6,
1 shows a state in which the weight is loaded on the heel part, as in FIG. 1 in the case of Embodiment 1 described above. FIG. 26 (a) shows the appearance of the footwear shown in FIG. 25 when there is no load, which corresponds to FIG. 3 (b) shown as the first embodiment. 26 (b) and (c) are shown in FIG. 26 (a).
FIG. 7 is a cross-sectional view of a chain line portion of the u-u cross section of FIG. The same reference numerals as those in FIG. 1 indicate the same or corresponding portions.

In the figure, the upper layer member 9, the insole 3m, the heel portion supporting elastic member 4a, the bottom material front elastic member 3 and the balance member 8 described in each of the above embodiments are covered with a covering material (not shown), The footing material 3g is formed. Reference numeral 2b indicates the upper of the slipper, and 2c indicates the lower end of the upper. Below the footing material 3g, a bottom surface covering material 3c is provided in which a synthetic resin foam material is exposed without being covered with a covering material. FIG. 26 shows a method of joining the instep cover 2b, the stepping material 3g, and the bottom cover material 3c.
(B) As shown in (c), the lower end 2c of the instep is joined between the upper layer member 9 and the insole 3m, or between the heel portion supporting elastic member 4a and the bottom cover member 3c. There are various methods, such as a method of connecting the lower end 2c of the instep to the upper layer member 9 and the elastic member 4a for supporting the heel portion, but the connection is limited to this method because it is not essentially related to the function of the present invention. Not a thing.

As another modification, in order to simplify the structure, the reinforcing member for the balance member 8 may be provided with the inner bottom 3 m. In this case, the insole 3m (in other words, the balance member 8)
Is arranged directly below the upper layer member 9, but the balance member 8 (middle sole 3m) may be arranged below the heel portion supporting elastic member 4a if the balance function is not hindered.

As described above, since the shape of the instep is similar to that of slippers, it is easy to put on and take off, and it is possible to obtain footwear useful for patients with osteoarthritis of the knee that can be used indoors, for example.

[0144]

【The invention's effect】

[Effect 1] As described above, according to the present invention, the footwear body is
It consists of an instep cover without a bottom material and a rear part, and the bottom material lower surface is composed of a front part of the bottom material and a rear part of the bottom material with a fulcrum as a boundary. The thickness of the bottom material in the bottom material rear region is such that the lower end of the metatarsal head is held higher than the lower end of the calcaneus of the human, and the lower surface of the bottom material on which the second metatarsal head is located rises from the horizontal line. The fulcrum portion is formed thicker than the rear portion, and the bottom portion rear region is provided with a shock absorbing mechanism such that the height of the heel portion of the surface contacting the human foot is lowered when a load is applied. Therefore, at the moment of landing, the calcaneus is pushed up at the moment of landing, and the knee is bent due to the "supporting effect close to the vertical line" in which the bottom surface of the bottom material where the second metatarsal head is located floats from the horizontal line when landing. If the knee bending effect is reduced and the "non-flexion effect of the knee joint" is obtained, Moni According to the "toes up" is also obtained a "knee stretching effect". In addition, since a shock absorbing mechanism is provided to compensate for the loss of the "natural shock absorbing function" that inevitably occurs as a side effect in the case of such a configuration, it is possible to absorb the impact when landing, Wear of the knee joint can be prevented. Furthermore, the transition from the “first state” to the “third state” through the “second state” can be easily performed by simply changing the inclination of the balance, and the “third state” can be easily changed. "Is in a state of" high heel-type preparation for leaving the bed "in which it is easy to move to the next step of leaving the bed. Therefore, even a patient with weakened muscle strength can easily get out of bed. The above functions physically act to prevent the wear of the knee joints of patients with osteoarthritis, prevent the progress of symptoms, and reduce the pain in the affected area.

Further, according to the present invention, in the above-described footwear for patients with knee osteoarthritis, the bottom material has a balance member for supporting the weight in a balance-like manner by the fulcrum.
The transition from the “first state” to the “third state” described in [Effect 1] can be performed without resistance, and the effect of [Effect 1] can be enhanced.

According to the invention, in the above-described footwear for patients with knee osteoarthritis, the balance member has a length substantially reaching from the front part of the heel to the front part of the metatarsal bone. Therefore, the weight carrying function of the balance member can be ensured, and the effect of [Effect 1] can be enhanced.

Further, according to the invention, in the above-mentioned footwear for patients with knee osteoarthritis, the fulcrum forms a ridge line across the bottom surface of the bottom material, and the distance between the ridge line and the rear end of the heel is In addition to the effect of [Effect 1], since the ridgeline on the little finger side is advanced compared to the ridgeline on the thumb side, measured parallel to the line connecting the center of the calcaneus and the second metatarsal bone, , Especially O
The effect is that the effective fulcrum position can be set on the leg.

Further, according to the present invention, in the footwear for a patient with knee osteoarthritis, the shape of the bottom material bottom surface between the lower surface of the bottom material on which the second metatarsal head is located and the fulcrum is such that it is under load. Since it is formed in a shape that is substantially straight or concave upward when viewed from the side, the effect that the fulcrum is prevented from moving while the body weight is moving and the resistance of the knee osteoarthritis patient during walking can be reduced There is.

According to the invention, in the footwear for patients with knee osteoarthritis, the bottom material bottom surface between the heel portion and the fulcrum has a substantially straight line shape when viewed from the side when loaded. Since it is formed in a concave shape or a concave shape upward, the lifting angle described in [Effect 1] can be accurately maintained and can be accurately held so as not to swing back and forth.

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the impact absorbing mechanism of the surface in contact with the heel of the human has a reaction force that the heel receives from the ground when the human walks. Since the knee bends forward and absorbs the impact, instead of or beyond the impact absorption function of the human knee, the impact at the time of landing is absorbed. This has the effect of further enhancing the shock absorbing effect described in [1].

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the impact absorbing mechanism is located at the heel of a human and is elastically deformed easily under the load of the heel. Is a heel-supporting elastic member made of an elastic material or an upper layer member above the bottom member, and the elastic deformation of the member lowers the surface of the upper layer member in contact with the human heel. There is an effect that the impact described in 1] can be absorbed and the above effect can be enhanced.

Further, according to the present invention, in the footwear for patients with knee osteoarthritis, the elastic force of the heel-supporting elastic member can be easily elastically deformed as compared with the respective members forming the balance member. Therefore, it is possible to obtain the impact absorbing effect and the weight carrying function described in [Effect 1] above.

According to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the difference in elastic force between the balance member and the heel-supporting elastic member is due to air bubbles, perforations, voids and recesses. Since it is formed by at least one of the difference in size or the number of shapes, the difference in cross-sectional area, or the difference in elasticity of materials, the heel-bearing elastic member and the weight-bearing function having the impact absorbing effect described in the preceding paragraph. There is an effect that it is possible to obtain a difference in elasticity with the balance member having the.

Further, according to the present invention, the rear end of the lower surface of the heel portion supporting elastic member is located at a position advanced from the rear end of the footwear, and the rear portion thereof is elastically deformed more easily than the heel portion supporting elastic member. In order to obtain the "supporting effect close to the vertical line" described in [Effect 1], the rear end of the lower surface of the heel-supporting elastic member is closer to the rear end of the footwear. Even when the vehicle is positioned forward, it is possible to obtain footwear that does not look strange.

[Effect 2] Further, according to the present invention, in the footwear for patients with knee osteoarthritis described in the above [Effect 1], from the rear side, the affected part of the knee joint is lowered when loaded. The inclined surface that becomes lower from the left to the right or becomes lower from the right to the left is formed on the upper part of the bottom material, so that it is explained by the above-mentioned "knee joint non-flexing effect" and "knee extension effect". The above-mentioned [Effect 1] is synergistic with the "correction of the axis line in the left-right direction" against the "correction of the axis line in the front-back direction"
By the "synergistic effect" of [1] and [Effect 2], the therapeutic effect on patients with knee osteoarthritis can be dramatically improved.

Further, according to the present invention, in the footwear for patients with knee osteoarthritis, the inclined surface is formed in the upper layer member made of an elastic material provided inside the footwear body. In addition to the above, there is an effect that the impact at the time of landing described in [Effect 1] can be absorbed by the elastic upper layer member.

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the inclined surface is formed so that the portion of the inclined surface for supporting a human heel is elastically deformed more easily than other regions. Therefore, in addition to the effect of the preceding paragraph, there is an effect that the initial impact at the time of landing can be absorbed.

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the difference in partial elastic force of the inclined surface is caused by the difference in size of bubbles, perforations, voids and recesses or Since it is formed by at least one of the difference in the number or the difference in elasticity of the materials, there is an effect that the difference in elastic force can be properly adjusted and the above effect can be ensured.

According to the present invention, in the footwear for patients with knee osteoarthritis, in the heel part supporting elastic member, the portion supporting the lower side of the inclined surface supports the higher side of the inclined surface. Since the elastic force between the low-side supporting portion and the high-side supporting portion is made different so that the lower side supporting portion is more likely to descend than the lower side supporting portion, while forming an inclined surface for obtaining the above [Effect 2], The effect of being able to absorb the shock described in the above [Effect 1] while simultaneously preventing the "uneven descent of the heel" that occurs as described above.

Further, according to the present invention, in the above-described footwear for patients with knee osteoarthritis, the difference in partial elastic force of the heel-supporting elastic member is due to the shapes of bubbles, perforations, voids and recesses. Formed by at least one of the difference in size or the number, the difference in cross-sectional area or the difference in elasticity of the material,
The difference in elastic force for obtaining the effect of the preceding paragraph can be adjusted appropriately, and the effect of the preceding paragraph can be ensured.

Further, according to the present invention, in the footwear for the patient with knee osteoarthritis, the instep of the heel portion does not allow the human foot to slip toward the lower side of the inclined surface, Since the instep cover on the lower side of the inclined surface is reinforced with the reinforcement material compared to the instep cover on the higher side, the heel slip caused by the structure described in [Effect 2] can be prevented and deformation of the instep can be prevented. effective.

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, at least a part of the shock absorbing mechanism of the shock absorbing function is formed of a shock absorbing material. The impact absorption can be achieved in place of the elastic deformation function of the elastic material described in 1).

According to the present invention, in the footwear for patients with knee osteoarthritis, the balance member formed between the upper surface of the sole and the ground contact surface, the heel portion supporting elastic member, and the decorative shoe. -Since the space of each member of the shape-forming member and the space between the members are filled with an elastic material whose elasticity is weaker than that of each member, the constituent members are exposed even if the bottom cover member is not provided. There is an effect that the appearance can be adjusted without doing.

Further, according to the present invention, in the footwear for patients with knee osteoarthritis, the shape of the ground contact surface located below the heel portion supporting elastic member is located laterally when viewed from the rear. In addition, it is formed by both side parts that come into contact with the ground and the inside part that is located between the two parts and that does not substantially contact the ground when there is no load, so even a light-weight person can elastically deform and absorb impact. However, even a heavier person can carry the weight without being excessively elastically deformed, so the elasticity of the heel-supporting elastic member, which should be designed according to the weight of each individual, should be lighter than that of a heavier person. It can be designed so that it can be shared with humans, and the "heel uneven descent phenomenon" can be reduced in a stable manner from side to side.

According to the present invention, in the footwear for patients with knee osteoarthritis, the angle at which the lower surface of the bottom material on which the second metatarsal head is located rises from the ground is such that the heel of the footwear has a load of 70 kg. Since it is assumed that the angle is at least 5 degrees in the received state, it is possible to keep the uplifting angle described in [Effect 1] properly and make it easier to get out of the bed when shifting to the “third state”. it can.

Further, according to the present invention, in the footwear for patients with knee osteoarthritis, the position of the lower fulcrum is measured from the rear end of the footwear body parallel to the second metatarsal bone, and the entire length of the footwear body is measured. Since it is installed at a distance of 41% to 65%, there is an effect that the position of the fulcrum can be set to the most suitable position for obtaining the effect described in [Effect 1].

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the impact absorbing function is provided on the upper part of the sole when the surface in contact with the heel of a human being receives a load of 70 kg. The elastic deformation of the upper layer member or the elastic member supporting the heel portion absorbs the impact, and the height of the surface in contact with the lower end of the human heel causes a drop of at least 2% of the total length of the footwear, as described in [Effect 1] above. It has the effect of making the shock absorption effect sufficient.

Further, according to the present invention, in the footwear for knee osteoarthritis patients, the impact absorbing function is such that when the heel portion receives a load of 70 kg, the heel portion-supporting elastic member elastically deforms to impact. Absorbing, the height of the rear end of the top of the sole material drops by at least 1% of the total length of the footwear.
It is possible to achieve a part of the shock absorbing effect described in.

According to this invention, in the footwear for patients with knee osteoarthritis, the position of the rear end of the lower surface of the heel-supporting elastic member is at least 5% of the total length of the footwear from the rear end of the footwear. Therefore, there is an effect that “the knee bending phenomenon of the heel” can be reduced by the “supporting effect close to the vertical line” described in [Effect 1] above.

Further, according to the present invention, in the above-mentioned footwear for a patient with knee osteoarthritis, the instep covering lacking the rear portion makes it easy to take off and put on, such as slippers and “grips”. be able to.

[Comprehensive Effect] The above-mentioned functions and actions are completely physical and prevent wear of the joint affected area due to friction. In addition, since it does not require the passage of time like a medicine, when a patient puts on this footwear, there is an immediate effect that pain during walking disappears immediately. In other words, as a result, "patients with difficulty in walking due to pain in the affected area" can walk, and it can be expected to save many patients with knee osteoarthritis.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a “first state” when walking with footwear for a knee osteoarthritis patient according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view (FIG. 2 (a)) “third” showing a “second state” when walking with footwear for a patient with osteoarthritis according to the first embodiment of the present invention. Longitudinal section showing "state" (Fig. 2 (b)), longitudinal section showing "fourth state" (Fig. 2 (c))
).

FIG. 3 is a longitudinal sectional view (FIG. 3 (a)) and an external view (FIG. 3) showing footwear for a knee osteoarthritis patient according to the first embodiment of the present invention.
(b)) and a bottom view of this footwear from the bottom (Fig. 3)
(c)).

FIG. 4 is a vertical cross-sectional view showing a modified example of the footwear for a knee osteoarthritis patient according to the first embodiment of the present invention.

FIG. FIG. 5 (a) is a longitudinal sectional view showing a modified example of the footwear for a patient with osteoarthritis of the knee according to the first embodiment of the present invention.
And a horizontal sectional view of the bottom of the footwear just above the bottom cover material of the footwear (FIG. 5 (b)).

FIG. FIG. 6 (a) is a longitudinal sectional view illustrating the function of footwear for a patient with osteoarthritis of the knee according to the first embodiment of the present invention.
Figure 5 (b)).

FIG. 7. FIG. 3 is a vertical cross-sectional view showing a modified example of the footwear for a knee osteoarthritis patient according to the first embodiment of the present invention.

FIG. 8 is a longitudinal sectional view showing footwear for a knee osteoarthritis patient according to the second embodiment of the present invention (FIG. 8 (a)), (FIG. 8 (b)).
).

FIG. 9 is a plan view of an upper layer member of footwear for a knee osteoarthritis patient according to a third embodiment of the present invention.

10 is a sectional view of the upper layer member aa of FIG. 9 (FIG. 10 (a))
), Bb sectional drawing (FIG.10 (b)), cc sectional drawing (FIG.10 (c)).

FIG. 11 is an explanatory view showing a joint of a patient.

FIG. 12 is an explanatory diagram showing a joint of a patient.

FIG. 13 is a horizontal cross-sectional view of the bottom material bottom just above the bottom cover material of the footwear for patients with knee osteoarthritis according to the fourth embodiment of the present invention.

FIG. 14 is a horizontal cross-sectional view of the bottom material bottom portion immediately above the bottom cover material showing a modification example of FIG.

FIG. 15 is a longitudinal sectional view showing footwear for a patient with knee osteoarthritis according to a fifth embodiment of the present invention.

FIG. 16 is an explanatory diagram illustrating an operation of FIG. 15.

FIG. 17 is a vertical sectional view showing a shoe of the earlier application.

FIG. 18 is a side view showing the appearance of a conventional shoe.

FIG. 19 is a side view showing the appearance of a conventional shoe.

FIG. 20 is an explanatory view illustrating an action of a force applied to a human heel on a knee.

FIG. 21 is an explanatory view for explaining the operation of the conventional high heel shoe.

FIG. 22 is an explanatory view for explaining the action of a conventional shoe with a low heel.

FIG. 23 is an explanatory view for explaining the theory of footwear for patients with knee osteoarthritis according to the first embodiment of the present invention.

FIG. 24 is a cross-sectional view of a portion of a footwear for a patient with knee osteoarthritis according to a sixth embodiment of the present invention, which carries a lower end of the heel of a human, when no load is applied (FIG. 24 (a)), when load is applied. (Fig. 24 (b)
).

FIG. 25 is a longitudinal sectional view showing footwear for a knee osteoarthritis patient according to a sixth embodiment of the present invention.

FIG. 26 is a side view showing the outer appearance of the footwear for a knee osteoarthritis patient according to the sixth embodiment of the present invention (FIG. 26 (a)).
), A cross-sectional view of FIG. 26 (a) (FIG. 26 (b), FIG. 26 (c)).
).

[Explanation of symbols]

100 shoe body, 101 instep, 102 bottom material, 3 bottom material front elastic member, 3b balance member portion, 3c bottom cover
Material, 3m insole, 3f void, 4 bottom material rear area, 4
a heel-supporting elastic member, 4b decorative heel shape forming member, 4M space, 4C space, 4L space, 4R space, 5, fulcrum, 7 bottom surface of bottom of metatarsal head bone,
8 balance member, 9 upper layer member, 10 upper layer member, 11
Post, 12 Balance member, 10a space, 20 Human heel, 30 Human metatarsal head, 50 Center of ankle,
106 Affected area.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (31) Priority claim number Japanese Patent Application No. 6-136338 (32) Priority date Hei 6 (1994) May 26 (33) Priority claim country Japan (JP) (72) Inventor Kumiko Isaka 41 Kannonji-cho, Izumi City, Osaka Prefecture

Claims (27)

[Claims] 1. Footwear for a patient suffering from osteoarthritis of the knee, comprising a bottom material and an instep covering lacking a rear portion, wherein the bottom surface of the bottom material is a front area of the bottom material with a fulcrum as a boundary. And a bottom material rear region, the second lower part of the metatarsal head of the human being is held higher than the lower part of the calcaneus in a state where the heel part is loaded.
In addition, the thickness of the bottom material in the rear part of the bottom material is formed such that the fulcrum portion is thicker than the rear part thereof so that the bottom material lower surface on which the second metatarsal head is located rises from the horizontal line, and The footwear for knee osteoarthritis patients, wherein the bottom part rear region is provided with an impact absorbing mechanism such that the height of the heel part of the surface contacting the human foot is lowered when a load is applied. . 2. The footwear for patients with knee osteoarthritis according to claim 1, wherein the sole material has a balance member for supporting the weight in a balance-like manner by the fulcrum. Footwear for patients with knee osteoarthritis. 3. The footwear for patients with knee osteoarthritis according to claim 2, wherein the balance member has a length that substantially reaches from the front part of the heel to the front part of the metatarsal bone. Characteristic footwear for patients with knee osteoarthritis. 4. The footwear for patients with knee osteoarthritis according to claim 1, wherein the fulcrum forms a ridge line across the bottom surface of the bottom material,
The distance of the ridgeline from the rear end of the footwear shall be measured parallel to the line connecting the center of the calcaneus and the second metatarsal head, and the ridgeline on the little finger side should be positioned ahead of the ridgeline on the thumb side. Footwear for patients with knee osteoarthritis characterized by: 5. The footwear for a patient with knee osteoarthritis according to claim 1, wherein the shape of the bottom material bottom surface between the lower surface of the bottom material on which the second metatarsal head is located and the fulcrum is such that it is under load. Footwear for patients with knee osteoarthritis, which is characterized by being substantially straight or dented upward when viewed from the side. 6. The footwear for knee osteoarthritis patients according to claim 1, wherein the bottom material bottom surface between the heel portion and the fulcrum is substantially linear or upward when viewed from the side when loaded. Footwear for patients with knee osteoarthritis, characterized by having a concave shape. 7. The footwear for patients with knee osteoarthritis according to claim 1, wherein the shock absorbing mechanism provided on the surface contacting the heel of the human is
When the human walks, the knee bends forward with the reaction force received by the heel from the ground to absorb the shock. Instead of the shock absorbing function of the human's knee, or to exceed that function to achieve shock absorption. Footwear for patients with osteoarthritis of the knee characterized by the following. 8. The footwear for a patient with knee osteoarthritis according to claim 1, wherein the impact absorbing mechanism is located at a heel portion of a human and is at least partially elastically deformed by a load of the heel portion. A heel supporting elastic member made of an elastic material, or an upper layer member provided on the bottom member, and the elastic deformation causes the surface of the upper layer member in contact with the human heel to drop. Footwear for patients with knee osteoarthritis. 9. The footwear for patients with knee osteoarthritis according to claim 8, wherein the elastic force of the heel-supporting elastic member can be elastically deformed more easily than the balance member. And
Footwear for patients with knee osteoarthritis. 10. The footwear for patients with knee osteoarthritis according to claim 9, wherein the difference in elastic force between the balance member and the heel-supporting elastic member is the shape of bubbles, perforations, voids and recesses. Footwear for patients with knee osteoarthritis, characterized in that it is formed by at least one of a difference in size or the number thereof, a difference in cross-sectional area or a difference in material elasticity. 11. The footwear for a patient with knee osteoarthritis according to claim 1, wherein a rear end of a lower surface of the heel-supporting elastic member is located at a position advanced from a rear end of the footwear, and the heel is located behind the heel. Footwear for patients with knee osteoarthritis, characterized by having a decorative heel-shape forming member that is more easily elastically deformed than the part-supporting elastic member. 12. The footwear for a patient with knee osteoarthritis according to claim 1, 2, 4, or 8, so that the affected part of the knee joint becomes low when loaded.
Footwear for patients with knee osteoarthritis, characterized in that an inclined surface that decreases from left to right or from right to left when viewed from the rear is formed on the upper part of the sole material. 13. The footwear for patients with knee osteoarthritis according to claim 12, wherein the inclined surface is formed on an upper layer member made of an elastic material provided on an upper portion of the bottom material. Footwear for patients with knee joint disease. 14. The footwear for patients with knee osteoarthritis according to claim 13, wherein the inclined surface is formed so that a portion of the inclined surface which supports a human heel is elastically deformed more easily than other regions. Footwear for patients with osteoarthritis of the knee characterized by: 15. The footwear for patients with knee osteoarthritis according to claim 14, wherein the difference in partial elastic force of the inclined surface is a difference in size of bubbles, perforations, voids and recesses, or Footwear for knee osteoarthritis patients, characterized in that it is formed by at least one of the difference in the number or the difference in elasticity of the materials. 16. The footwear for patients with knee osteoarthritis according to claim 8 or 12, wherein the heel portion supporting elastic member has a portion supporting a lower side of the inclined surface and a higher side of the inclined surface. Footwear for patients with knee osteoarthritis, characterized in that a difference in elastic force is provided between the lower side supporting portion and the higher side supporting portion so that the lower side supporting portion and the higher side supporting portion can be easily lowered. 17. The footwear for knee osteoarthritis patient according to claim 16, wherein the partial elastic force difference between the heel-supporting elastic members is air bubbles,
Patients with knee osteoarthritis characterized by being formed by at least one of a difference in size or number of perforations, voids and recesses, and a difference in cross-sectional area or elasticity of material. Footwear. 18. The footwear for a patient with knee osteoarthritis according to claim 12, wherein the instep cover is provided on a lower side of the inclined surface so that a human foot does not slip toward the lower side of the inclined surface. Footwear for patients with knee osteoarthritis, characterized in that it is reinforced with a reinforcement material compared to the upper instep. 19. The footwear for patients with knee osteoarthritis according to claim 1, wherein the shock absorbing function is such that at least a part of the shock absorbing mechanism is formed of a shock absorbing material. Footwear for patients with knee osteoarthritis. 20. Footwear for a patient with knee osteoarthritis according to claim 2, 8 or 11, wherein the balance member, the heel portion-carrying elastic member, formed between the upper surface of the sole and the ground contact surface. Patients with knee osteoarthritis characterized in that the space of each member of the decorative heel shape forming member and the space between the members are filled with an elastic material whose elasticity is weaker than that of each member. Footwear. 21. Footwear for a knee osteoarthritis patient according to claim 8, wherein the shape of the ground contact surface located below the heel part supporting elastic member is located laterally when viewed from the rear. And footwear for patients with knee osteoarthritis, characterized in that the footwear is formed of both side parts that come into contact with the ground and an inner part that is located between the both parts and that does not substantially come into contact with the ground when there is no load . 22. The footwear for a patient with knee osteoarthritis according to claim 1, wherein an angle at which the lower surface of the bottom material on which the second metatarsal head is located rises from the ground is such that the heel of the footwear has a load of 70 kg. Footwear for patients with knee osteoarthritis, characterized in that the footwear is at an angle of at least 5 degrees when received. 23. The footwear for patients with knee osteoarthritis according to claim 1, wherein the position of the fulcrum is measured from the rear end of the footwear body in parallel with the second metatarsal bone and along the entire length of the footwear body. Footwear for patients with knee osteoarthritis, characterized in that they are at a distance of 41% to 65%. 24. The footwear for a patient with knee osteoarthritis according to claim 1, wherein the impact absorbing function has a load 7 on a surface in contact with a human heel portion.
When 0 kg is received, shock is absorbed by elastic deformation of the upper layer member or the heel portion supporting elastic member provided on the bottom material, and the height of the surface in contact with the lower end of the human heel is at least 2% of the total length of the footwear. Footwear for patients with knee osteoarthritis characterized by causing a descent. 25. The footwear for patients with knee osteoarthritis according to claim 1, wherein the impact absorbing function has a load of 7 on a heel portion.
When 0 kg is received, the impact is absorbed by the elastic deformation of the heel portion supporting elastic member, and the height of the rear end of the upper surface of the sole can drop by at least 1% of the total length of the footwear. Footwear for patients with knee osteoarthritis. 26. The footwear for a patient with knee osteoarthritis according to claim 11, wherein the position where the rear end of the lower surface of the heel-supporting elastic member is advanced from the rear end of the footwear is from the rear end of the footwear. Footwear for patients with knee osteoarthritis, which is at least 5% of the total length of the footwear. 27. The footwear for a knee osteoarthritis patient according to claim 1, wherein the footwear having no rear part of the instep is a tuck or a slipper. Footwear for patients with arthrosis.