JPH0838529A - Footwear for knee osteoarthritis patient - Google Patents

Abstract

PURPOSE:To facilitate walking while preventing strange appearance by forming an upper into a shoe shape and forming a sole material from front and rear regions forming a fulcrum at the boundary of them to make the same shakable at the fulcrum in a seesaw like manner and making the thickness of the front region of the sole material less than that of the fulcrum part and providing an ankle part with a shock absorbing mechanism. CONSTITUTION:A shoe main body 100 is constituted of a shoe-shaped upper 101 and a sole material 102. The sole material 102 is constituted of front and rear regions 3, 4 and a fulcrum 5 is formed to the boundary of both regions 3, 4. A balance member 8 is attached above the fulcrum 5 not only to support one's body wt. in a balance like manner but also to shake the sole material 102 in a seesaw like state centering around the fulcrum 5. That is, the thickness of the front region 3 of the sole material is gradually reduced forwardly as compared with the thickness of the fulcrum part so that the balance member 8 is inclined when an ankle receives load to float at the front part thereof. Further, an ankle part supporting elastic member 4a is attached to a region where the earth surface of an ankle 20 is positioned 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 knee osteoarthritis, and in particular, the footwear has a function sufficient for use in the above-mentioned patients, and in addition to such a function, the footwear is also provided. The present invention relates to footwear that prevents the appearance from becoming strange in order to obtain the above-mentioned function and has the above-mentioned function and at first glance an appearance that is not different from ordinary footwear.

[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. In addition, in another example, FIG.
There are shoes like this, which are sold for muscle training.

Although not shown in the prior art example 3, there is a known rocker shoe which has a bottom surface in an arc shape curved in the front-rear direction and swings back and forth like a cradle. .

In order to obtain a functionally superior product to the above-mentioned conventional example, a series of six prior applications (hereinafter referred to as prior application) by JP-A-2-107243 and the like by the same inventor of the present invention. ). In this earlier application, the following theory is stated as means for preventing wear of the knee joint of patients with osteoarthritis of the knee.

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 a shoe-shaped upper cover. The bottom material is a fulcrum provided on the bottom surface and the front of the fulcrum. And a bottom member front region and a bottom member rear region which are positioned rearward and swing in a seesaw shape.
The thickness of the bottom material in the front part of the bottom material is formed so that the front part is thinner than the fulcrum so that the lower surface of the bottom material where the metatarsal head is located rises from the horizon. The region of the heel located on the ground contact surface is provided with a shock absorbing mechanism, at least a part of which is made of an elastic material.

The footwear for patients with knee osteoarthritis according to the present invention comprises a bottom material and a shoe-shaped instep cover. The bottom material is a ridge line that traverses the bottom surface and bottom materials that are located before and after the ridge line. Consists of an anterior region and a bottom material posterior region, and the ridgeline is relative to the line connecting the center of the calcaneus and the second metatarsal head so that the ridgeline on the little finger side is more advanced than the ridgeline on the thumb side. They are turning and intersecting.

Further, according to the present invention, in the footwear for patients with knee osteoarthritis, the shape of the bottom material bottom surface when the both ends of the ridge line are arranged at the same height is located below the second metatarsal head. The contour line passing through the point is formed so that the little finger side is advanced as compared to the thumb side, while turning and intersecting with the line connecting the center of the calcaneus and the second metatarsal head.

Further, according to the present invention, in the above-described footwear for a patient with knee osteoarthritis, the contour line located between the contour line and the front end of the sole is connected to the line connecting the center of the calcaneus and the second metatarsal head. The bottom surface of the bottom member is formed so that the little finger side moves forward as compared to the thumb side.

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the impact absorbing mechanism provided on the surface in contact with the human heel replaces the impact absorbing function of absorbing the impact when the human knee bends. Or a member made of a material having an elastic force capable of absorbing a shock exceeding it,
It is formed in the area of the bottom material located on the ground contact surface of the human heel.

In the footwear for patients with knee osteoarthritis according to the present invention, at least a part of the impact absorbing mechanism provided in the bottom material of the area of the ground contact surface of the human heel is elastic material. An elastic member supporting a heel portion and / or an upper layer member made of an elastic material provided on an upper part of a bottom material, and the elastic member supporting the heel portion and / or the upper layer contacting a human heel portion by elastic deformation of the upper member. The surface of the member descends.

Further, according to the present invention, in the footwear for patients with knee osteoarthritis, the position of the rear end of the lower surface of the elastic member for supporting the heel portion in the front-rear direction is measured at the center of the bottom width, and the heel of the human heel is contacted. It is located in front of the rear edge of the ground.

In the footwear for patients with knee osteoarthritis according to the present invention, the rear portion of the rear end of the lower surface of the heel-supporting elastic member is more easily elastically deformed than the heel-supporting elastic member. -It has a profile forming member.

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the shape of the rear bottom surface of the rear end of the lower surface of the heel-supporting elastic member is formed as an ascending slope so as to gradually move backward from the ground. It is a thing.

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

In the footwear for patients with knee osteoarthritis according to the present invention, the balance member has a length substantially extending from the front part of the heel of the human to the front part of the metatarsal bone.

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.

In the footwear for patients with knee osteoarthritis, the difference in elastic force between the balance member, the heel-supporting elastic member, and the decorative heel-shape forming member is a bubble. It is formed by at least one of the difference in the size or the number of the shapes of the perforations, the cavities and the recesses, the difference in the cross-sectional area or the difference in the elasticity of the material.

Further, in the footwear for patients with osteoarthritis of the present invention, the affected part of the knee joint is lowered,
The bottom surface is formed with an inclined surface that decreases from left to right or from right to left when viewed from the rear.

Further, according to the present invention, in the above-mentioned 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.

The present invention also provides the above-described footwear for patients with knee osteoarthritis, wherein the inclined surface is a part of the inclined surface, and an area portion for supporting a human heel is formed in another region of the inclined surface. It is formed so as to be easily elastically deformed in part as compared with.

In the footwear for patients with knee osteoarthritis according to the present invention, the difference in partial elastic force of the inclined surface is the difference in size or number of bubbles, perforations, voids and recesses. Or the difference in the elasticity of the material, it is formed by at least one.

Further, according to the present invention, in the footwear for a patient with knee osteoarthritis, the heel-portion elastic member for supporting the lower side of the inclined surface is the heel-portion elastic member for supporting the higher side of the inclined surface. The elastic force of the low-side supporting elastic member is different from that of the high-side supporting elastic member so that the lower-side supporting elastic member and the higher-side supporting elastic member may be lowered more easily.

In the footwear for patients with knee osteoarthritis according to the present invention, the difference in elastic force of the heel-supporting elastic member between the lower side and the higher side is due to air bubbles, perforations, voids and recesses. 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 material elasticity.

Further, according to the present invention, in the footwear for patients with knee osteoarthritis, the shape of the bottom material bottom surface between the bottom surface of the bottom material where the second metatarsal head is located and the fulcrum is lateral when loaded. It is formed in a substantially straight line shape or a shape that is recessed upward when viewed from above.

Further, according to the present invention, in the above-described footwear for patients with knee osteoarthritis, the bottom material bottom surface between the heel portion and the fulcrum is substantially linear or upward when viewed from the side when loaded. It is formed in a concave shape.

Further, according to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the shapes of the ground contact surfaces located below the heel-supporting elastic members are respectively located laterally when viewed from the rear and are on the ground. It is formed by both side portions contacting with each other and an inner side portion located between the both side portions and substantially not contacting the ground when there is no load.

In the footwear for patients with knee osteoarthritis according to the present invention, the shock absorbing function is formed by a shock absorbing material in place of at least a part of the shock absorbing mechanism in place of the elastic material. .

[0039]

In the present invention, the footwear main body is composed of a sole and an instep, and the footwear is used for patients with osteoarthritis of the knee,
The bottom material is composed of a fulcrum provided on the bottom surface and a bottom material front region and a bottom material rear region located in front of and behind the fulcrum and swinging in a seesaw shape, and receives a load on the heel portion. In this state, the bottom material of the bottom material on which the second metatarsal head is located rises above the horizon so that the thickness of the bottom material in the front part of the bottom material is smaller than that of the fulcrum. Further, since the region formed and located on the ground contact surface of the human heel has a shock absorbing mechanism, at least a part of which is made of an elastic material, by configuring in this manner, the "knee generated at the start of landing""Stretchingeffect" and "Supporting effect close to the vertical line"
(Described later) is obtained. On the other hand, a shock-absorbing mechanism that compensates for the "natural loss of shock-absorbing function" that naturally occurs as a side effect of the above-mentioned "support effect close to the vertical line" is provided as described below. Prevent the above side effects.

According to the present invention, in footwear for patients with knee osteoarthritis, the body of the footwear is composed of a sole and an instep, and the sole is located at a ridge line that crosses the bottom surface and before and after the ridge line. Consists of a front part of the bottom material and a rear part of the bottom material. The ridge line is a line connecting the center of the calcaneus and the second metatarsal head so that the ridge line on the little finger side is more advanced than the ridge line on the thumb finger side. Since the vehicle turns and intersects with each other, not only can the walking motion be performed smoothly, but also a remarkable effect can be obtained especially for a patient with an O-leg described later.

Further, in the present invention, in the footwear for patients with knee osteoarthritis, the shape of the bottom material lower surface when the both ends of the ridge line are arranged at the same height is that the shape of the bottom material is below the second metatarsal head. The contour line passing through the located point is formed so that the little finger side is advanced as compared to the thumb side, by turning and intersecting the line connecting the center of the calcaneus and the second metatarsal head and intersecting, This effect is enhanced, and particularly, the effect of the O-leg described later on the patient is enhanced.

In the footwear for patients with knee osteoarthritis according to the present invention, the contour line located between the contour line and the front end of the sole is a line connecting the center of the calcaneus and the second metatarsal head. Since the bottom material bottom surface is formed so that it turns and crosses with respect to it and the little finger side moves forward as compared to the thumb side, the effect described in the preceding paragraph is enhanced, and particularly the effect of the O-leg described later on the patient is enhanced. Strengthen.

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 has a shock absorbing function of absorbing an impact when the human knee bends. In place of or beyond, a member made of a material having an elastic force capable of absorbing impact is formed in the area of the bottom material located on the ground contact surface of the human heel. It is possible to compensate for the "loss of natural shock absorption function" that naturally occurs as a side effect of "close support effect" and to walk easily.

In the footwear for patients with knee osteoarthritis according to the present invention, at least a part of the impact absorbing mechanism provided in the bottom material of the region located on the ground contact surface of the human heel is elastic. A heel supporting elastic member made of a material and / or an upper layer member made of an elastic material provided on an upper part of the bottom material, and contacting the human heel by elastic deformation of the heel supporting elastic member and / or the upper member Since the surface of the upper layer member descends, it is possible to compensate for the "natural loss of shock absorption function" that occurs as a side effect of the "support effect close to the vertical line". .

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 portion supporting elastic member in the front-rear direction is measured at the center of the bottom width, and the heel of a human heel is measured. Since it is located in front of the rear end of the ground contact surface, the above-mentioned "support effect close to the vertical line" can be obtained.

Further, in the present invention, in the footwear for patients with knee osteoarthritis, the rear of the lower surface rear end of the heel-supporting elastic member is a decorative member that is more easily elastically deformed than the heel-supporting elastic member. Since it has a heel shape forming member, despite the fact that the rear end of the bottom surface of the heel is substantially positioned at a special position for obtaining the above-mentioned "support effect close to the vertical line". , You can make the heel look like normal footwear.

According to the present invention, in the footwear for patients with knee osteoarthritis, the shape of the rear bottom surface of the rear end of the lower surface of the heel-supporting elastic member is formed as an ascending slope so as to gradually move backward from the ground. Therefore, the rear part from the rear end of the lower surface of the heel portion supporting elastic member is not grounded. Therefore, it is possible to obtain the above-mentioned "support effect close to the vertical line".

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. It is possible to support and smoothly perform the operation of tilting in a seesaw shape from the "first state" to the "fourth state" described later.

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 ensure the above-described action of supporting the weight in a balance.

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, the heel portion supporting elastic member and the decorative heel shape forming member is: Since it is formed by at least one of the difference in the size or the number of the shapes of the bubbles, perforations, voids and recesses, and the difference in the cross-sectional area or the elasticity of the material, the impact absorbing function and the weight carrying function described above. And the elastic function of the decorative heel shape forming member can be properly formed.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the height is lowered from left to right when viewed from the rear or lowered from right to left so that the affected part of the knee joint is lowered. It is well-known that a sloped surface is formed on the upper part of the bottom material, and the left and right axial directions of the bones connected to the upper and lower joints are guided to protect the affected side of the knee joint, and the effect is insufficient. Is also well known. In the present invention, due to the synergistic effect of the inclined surface, the above-mentioned seesaw-like swing, and the above-described turning angle of the bottom ridge, an effect which cannot be obtained only by the known inclined surface is obtained. It is especially effective for patients with O-legs.

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 action, the landing is performed. 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 a part of the inclined surface, and the area portion for supporting the heel of a human is different from that of the inclined surface. Since it is formed so as to be easily elastically deformed in part as compared with the region, it is possible to absorb a small initial impact at the time of landing in addition to the above-mentioned action.

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.

According to the present invention, in the footwear for patients with knee osteoarthritis, the heel-bearing elastic member that carries the lower side of the inclined surface is the heel-bearing elastic member that carries the higher side of the inclined surface. Since a difference in elastic force between the low-side supporting elastic member and the high-side supporting elastic member is provided so that the lower side supporting elastic member and the higher side supporting elastic member may be more easily lowered, the "unequal descent phenomenon of a heel" which occurs as a side effect of setting the inclined surface. Can be prevented.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the difference in elastic force of the heel part supporting elastic member between the lower side and the higher side is due to bubbles, perforations, voids and recesses. Since it is formed by at least one of the difference in the size or the number of the shapes, 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 bottom material bottom surface between the lower surface of the bottom material on which the second metatarsal head is located and the fulcrum has a shape when the side is under load. 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.

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 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, according to the present invention, in the above-mentioned 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 made up of both side parts that come into contact with the ground and an inner part that is located between both side parts and that does not substantially come into contact with the ground when there is no load. It deforms and absorbs shock,
A heavier weight person also adds the inner portion to carry the weight, so that it is not elastically deformed excessively, and the tolerance can be increased so that it can be commonly used by a light weight person and a heavy weight person.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the shock absorbing function may be formed by a shock absorbing material instead of at least a part of the shock absorbing mechanism. it can. Even in that case, the impact at the time of landing can be absorbed together with or instead of the impact absorption by the elastic material.

[0062]

EXAMPLE 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 4, 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 fifth embodiment. Descriptions of both the case with the instep and the case without the instep are incorporated throughout the present specification, and the description of [action], [Example], and [Effect] common to both is with "shoes". The description will be made on behalf of each other, and the same or corresponding portions common to both will be described with common reference numerals.

Example 1. 1 and 2 (a), (b), and (c) are diagrams showing a process of walking while wearing shoes for a patient with knee joint disease according to an embodiment of the present invention, in order from landing to kicking out. And shows a state of swinging like a seesaw from a "first state" to a "fourth state" which will be described later. 3 (a) and 3 (b) show the shoe of Example 1 of the present invention when there is no load immediately before the start of landing,
FIG. 3 (c) is a bottom view of the shoe sole. Figure 3 (a) is the same as Figure 3 (c).
FIG. 3B is a vertical cross-sectional view taken along the chain line vv of FIG. 3, and 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 front region, 4 is a bottom material rear region, 5 is a bottom material front region 3 and a bottom material rear region 4. 8 is a fulcrum located on the boundary between and, and 8 is a balance member which is provided on the fulcrum 5 and carries the weight in a balance-like manner. In the state shown in FIG. 1 in which the heel part is loaded, the balance member 8 is tilted and the front part is raised, and the lower end of the human second metatarsal head 30 is held higher than the calcaneus lower end 20. The bottom material front region 3 is formed so that the bottom material lower surface 7 on which the bone head 30 is located rises above the horizon.
Is formed so as to be gradually thinner toward the front than the thickness near the fulcrum 5, and the bottom material rear region 4 is gradually rearward compared to the thickness near the fulcrum 5 (also due to the elastic deformation described later). It is thin. 9 is an upper layer member formed above the bottom material,
40 is the second metatarsal bone of the human, 50 is the center of the ankle of the human, 3c is a bottom cover material, 4a is a substantial heel, and an elastic member for supporting the heel portion described later, 9a is the lower end of the human heel. Shows the upper surface of the upper layer member 9 and e shows the rear end of the lower surface of the heel portion supporting elastic member 4a. It is preferable that the length of the balance member 8 in the front-back direction substantially reaches the position of the front part of the metatarsal bone from the position of the front part of the heel of a human.

FIG. 3C is a bottom view of the shoe of this embodiment. Generally, in the case of a normal shoe structure, the floor separation point at which the front part of the shoe sole curves upward and separates from the ground is that the floor separation point on the little finger side is shorter than that on the thumb side (the little finger side is the shortest). So it is located backwards. However, in the embodiment of the present invention, the position of the fulcrum 5 is indicated by the line 5 in FIG. 3 (c) (bottom view).
As shown by -5, the fulcrum 5 forms a straight ridge line 5-5 that traverses the bottom surface of the bottom material. This ridge line is measured from the rear end of the heel, and the ridge line on the little finger side is forward compared to the ridge line on the thumb side. Is located. This is the opposite of ordinary shoes. In other words, the ridgeline on the little finger side is positioned to be advanced compared to the ridgeline on the thumb finger side, while turning and intersecting with the chain line VV connecting the center of the calcaneus and the second metatarsal head. In this case, the turning angle of the line 5-5 with respect to the line P-P orthogonal to the chain line V-V should be set in consideration of whether the patient's walk is the inner ring (toe in) or the outer ring (toe out). Is preferred. Outer ring (toe ou
In case of t), it is necessary to make many turns. If it is designed to be commonly used, the turning angle is, for example, 1
Set around 5 degrees. Further, the combination of the loose outer ring and the inner ring may be set to 10 degrees, and the outer ring may be set to 20 degrees, or the three kinds such as 5 degrees, 15 degrees and 25 degrees. With this configuration, when the legs gradually move and the front part of the balance member 8 drops in a seesaw shape, the fulcrum on the little finger side, which is provided forward, is close to the little finger. Is short, and therefore the amount of seesaw movement is small, and the little finger does not greatly descend. On the contrary, the retracted fulcrum on the thumb side is far from the thumb, so that the distance between the fulcrum 5 and the thumb is long, so that the thumb moves largely due to a large movement. Generally, when walking with ordinary shoes, the load concentrates on the thumb when leaving the floor, but in the present embodiment, the thumb is greatly lowered to prevent the load from being concentrated on the thumb in the above configuration, which is a unique behavior of the present invention. The seesaw-like swinging motion can be smoothed. In addition, this theory has the effect of generating a force E (described later) that pushes down the affected side (thumb side) of the O-leg patient, as will be described later in the second embodiment. On the other hand, it was particularly effective, and was significantly effective in clinical experiments.

The bottom material lower surface 7 located below the second metatarsal head 30 can be considered to be a point 7 as indicated by reference numeral 7 in FIG. 3 (c). In the figure, the ridge line 5- that constitutes the fulcrum
When arranging 5 at the same height, the contour line of the bottom surface passing through the point 7 is swung to intersect the chain line V-V as shown by the line 7a-7a, and the little finger side is moved forward as compared with the thumb side. It is preferably located. As a result, the seesaw movement was made smoother, and the effect of preventing the O-leg was obtained.

For the same reason, it is preferable to advance the little finger side more than the thumb side, as indicated by the contour line bb between the above 7a-7a and the front end of the bottom material. Depending on the case, the little finger side of the contour line c-c may be moved forward in the front of the contour line b-b as well.

FIG. 1 is a sectional view showing a landing start state in which a load is applied to the heel portion. Internal member 9 that contacts the lower end of the human heel
With the surface of the shoe under a load of 70 kg, a line connecting the lower surface 7 of the shoe sole located below the second metatarsal head 30 and the fulcrum 5 rises from the horizontal line at an angle. The state as shown in FIG. 1 in which the second metatarsal head is lifted due to the load applied to the heel portion in this manner is hereinafter referred to as a “first state”.

In the embodiment shown in FIG. 3 (a), the floating angle is set to 9 degrees (no load). If it exceeds a certain limit and is set to a large value, for example, 15 degrees (when there is no load), the design becomes bad and the ease of walking is reduced. Therefore, it is preferable that the above-mentioned lifting angle is an angle that can cause the below-mentioned "third state" (high heel type bed leaving preparation) when a load is applied to the heel portion, and is the maximum when there is no load. However, it is desirable to set it within the range of less than 15 degrees, preferably 14 degrees or less. Compared with the above-mentioned conventional example 2, the conventional example 2 had an unavoidable requirement to increase the angle (for example, 15 degrees or 18 degrees) in order to move the heel far away from the ground. This is a significant difference from the present invention. In the present invention, as shown in FIGS. 1 and 23, the line (oblique side) R4 connecting the ankle and the calcaneus lower end d approaches the χ-χ depending on the heel down angle.
The "flexing effect of the knee joint" is obtained by the "support effect close to the vertical line" described below, and the "knee extension effect" described below is also generated to prevent abrasion of the knee joint. Produce an effect.

The heel portion supporting elastic member 4a is located in the region of the ground contact surface of the human heel, and the position of the rear end e of the lower surface in the front-rear direction is measured at the center of the bottom material width, and the ground contact surface of the human heel is measured. Position it forward of the rear edge. The reason for this will be described in detail in "Supporting effect close to vertical line" and the description regarding FIG. In addition, as shown by the line ee in the bottom view FIG. 3 (c),
The rear end of the lower surface of the heel portion supporting elastic member 4a is preferably swiveled with respect to the vertical axis vv so that the little finger side advances more than the thumb side. The ground contact surface of the human heel is a black portion that is marked on the paper by applying ink to the sole of the foot. Generally, there is a distance between the rear end of the ground contact surface of the human heel and the last end of the shoe body, and the distance is, for example, 15 mm.

When a load is applied to the unloaded state shown in FIG. 3 (a), the heel portion supporting elastic member 4a is compressed and deformed as shown in FIG. 1, but in this embodiment, as shown in FIG. A decorative heel shape forming member 4b is provided behind the portion supporting elastic member 4a.
And the decorative heel shape forming member 4b is formed.
Is formed so as to be less deformable than the heel portion supporting elastic member 4a so as not to participate in weight bearing as much as possible, and thus prevents the "knee bending action of the heel" as shown in FIG. 20 (b) as a conventional example. can do.

In this embodiment, the decorative heel shape forming member 4b is easily deformed by enlarging the void 4C, which is the same as the heel portion supporting elastic member 4a in place of the void 4C. The same effect can be obtained by forming a material and increasing the number of recesses, perforations or bubbles (not shown). Further, it may be formed of a material softer than the heel portion supporting elastic member 4a. It is preferable that the rear portion of the lower surface rear end e of the heel portion supporting elastic member 4a is formed as a rising slope d1 (FIG. 3 (a)), which is slightly raised so as to be separated from the ground.

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. 1) of the decorative heel shape forming member 4b.
In FIG. 16, 5) was filled with the material 4h. If you are going down a slope under the same conditions as in FIG. 15 or when landing with your toes raised, there is no empty space 4c, so the reaction force of the arrow A from the harmful ground described in the conventional example occurs at the 4h portion,
Impact the affected area of the knee joint.

A large space 4 is larger in FIG. 15 than in 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.

Even if the decorative heel shape forming member is filled with an elastic material as shown by 4h as shown in FIG. 16, the rear end e of the heel portion supporting elastic member 4a is modified as a modification.
May be cut away from the line d-d to the bottom, and the shape of the bottom surface may be formed in an ascending slope that gradually separates backward from the ground. Notching the lower part from the line d-d is a bad design in that the rear part from the rear end e of the bottom of the heel is substantially cut off, but the above-mentioned effect "supporting effect close to the vertical line" is caused. can get.

In each of the above embodiments and modifications, the lower surface rear end e of the heel portion supporting elastic member 4a that substantially supports the weight.
The position in the front-back direction is located in front of the rear end of the ground contact surface of the human heel, measured at the center of the bottom width. Generally, the position of the rear end of the ground contact surface of the human heel is at a position advanced by, for example, 6% from the rear end with respect to the entire length of the shoe main body. However, since it is preferable to further advance it for the reason described later, in this embodiment, the rear end e of the heel portion supporting elastic member 4a is set at a position advanced by 12% from the rear end of the shoe body. Experiments have shown that this position gives good results in the range of 6% -18%, preferably in the range of 8% -16%. The upper limit is because the shape becomes strange, so it may be functionally large. The lower limit is because the function becomes insufficient. In this way, setting the rear end e of the heel portion supporting elastic member 4a so as to be advanced from the rear end of the footwear body is effective in further enhancing the above-mentioned "flexion effect of the knee joint". . That is, as a result of the rear end e being provided forward, the hypotenuse R
4 (FIGS. 1 and 23) approaches the vertical line.

The rear end E of the heel shown in FIG. 17 as a prior application is formed of a hard material into an angular corner, and at the moment of landing, only the rear end E carries a concentrated weight. However, on the contrary, in the embodiment of FIG. 1, since the heel portion supporting elastic member 4a itself is formed of a soft material, the square shape of the rear end e shown in FIG. 1 seems to be angular. In reality, since it is deformed flexibly, the weight is carried by the entire heel part supporting elastic member 4a, so 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. 13 (described later). Assuming the hypotenuse 5 passing through the center of gravity V, the hypotenuse R5 passes through the hypotenuse R4 and becomes closer to the vertical line as shown by the dotted line in FIGS. 1 and 23. Although the estimation of the angle of the hypotenuse R5 is not definite, it passes through at least the hypotenuse R1, R2, R3, or R4 shown in FIG.
It can be expected that approaching 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 hypotenuse 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 more sufficiently prevent the "knee bending effect of the heel" in the direction of the arrow B.

Further, in the embodiment of the present invention, since the lower end of the calcaneus is brought close to the vertical line χ-χ in order to obtain the "knee joint non-flexing effect", the toes are lifted from the ground. Losing the spring of the arrow A and the arrow B described in the section of [Prior Art] and losing the "natural shock absorbing function",
In order to compensate for this, the bottom material rear region 4 is designed so that the height of the surface of the heel part in contact with the lower end of the heel of the human is elastically deformed and lowered by the above load, and the impact at the start of landing is reduced. Absorb. 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 sufficient for a patient who suffers from pain and suffers step by step 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. Since the shock absorbing mechanism of the sports shoe is designed to have a structure in which it is elastically deformed by such a strong force, it cannot be sufficiently elastically deformed by a quiet landing of the patient.

The elastic deformation referred to here is an elastic deformation that is deformed by a load that can substantially contribute to carrying weight. If, on the other hand, a layer of special soft material (eg feathers, soft sponge) is used as an insole, it cannot be said to carry weight and with extremely weak force (eg less than 1 kg / 1 cm ² ). Even if the material is deformed, the numerical value of the deformation of the material is far from the purpose of weight bearing and is confusing. Therefore, the numerical value of the elastic deformation of the weight bearing elastic member is excluded from the calculation. A configuration in which the patient is gently landed 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 by the load from the state of FIG. 3 (a) to the state of FIG. As a material that is easily elastically deformed, E.I. V. A soft foam material called A (ethylene vinyl acrylic) resin was used. To try out how soft it is, this material is 10mm x 10mm x
Take 10mm, insert it between your fingers and push it,
It was easily compressed to 1/4. 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.

When the inner member 9 provided inside the shoe body is also made of an elastic material, the surface 9a for receiving the heel of a human is slightly recessed to help absorb shock. 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 inner 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 inner member 9 located at the lower end of the heel. .

The elastic material for shock absorption, including each of the embodiments described below, may be partially replaced by the shock absorption material, if necessary.

The heel 9a on the surface of the inner member 9 is desired to compensate for the impact absorbing function, in other words, the elastic deformation of the elastic material, to compensate for the loss of the "natural impact absorbing function" possessed by humankind. The material of the part-bearing member 4a is one that can be sufficiently elastically deformed. For example, when the static load applied to the surface 9a of the lower end of the heel of the inner member 9 is 70 kg, the total length of the footwear is set to 250 mm and the descending dimension is set in the embodiment. To 10.0
It is set to mm, which is 4% of the total length of the shoe. I tried to make the drop size 2%, 3%, 4%, 5%, 6% of the total length of the shoe. 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 4% of the examples, the shock absorption is sufficient. If it is increased to 7% or 8%, the shock absorbing function is further enhanced, but unless the thickness of the bottom material is increased, the upper limit is also suppressed by the thickness.

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.

FIG. 5 shows a modification in which the structure is simplified for the purpose of reducing the manufacturing cost. In this modification, the bottom member front elastic member 3, the balance member 3b, and the heel portion supporting elastic member 4a are made of the same material. The balance member portion 3b, which is a portion corresponding to the balance member 8 described above, has a heel portion supporting elastic member 4
It is integrally formed of the same material as a. However, Fig. 5
As shown in (a) and (b), there is a difference in elastic force between the balance member portion 3b and the heel portion supporting elastic member 4a due to the difference in cross-sectional area. In other words, the balance member portion 3b is formed without providing a void, while the heel portion supporting elastic member 4a is provided with a void 4C,
The cross-sectional area is reduced by 4M. Therefore, the balance member portion 3b is not elastically deformed as compared with the heel portion supporting elastic member 4a. In this way, when the pillar member portion 3b is made of the same material as the heel portion supporting elastic member 4a, it is desirable to provide the reinforcing member 6 for reinforcement. In addition, the insole 3 with sufficient strength
m may be used as the reinforcing member. In the modified example of FIG. 5, the portion of the fulcrum 5 easily receives a load and is recessed, and the position of the fulcrum 5 is likely to be indefinite. If the portion of the fulcrum 5 becomes indefinite, the fulcrum moves as the leg advances, and the fulcrum 5 moves forward to make walking difficult (the adverse effect of the movement of the fulcrum will be described later). Therefore, it is not so preferable to form the balance member portion 3b with a soft material. However, when the balance member portion 3b and the heel portion supporting member 4a are made of a common slightly hard material in order to avoid the movement of the fulcrum, the heel portion supporting elastic member 4a does not sufficiently elastically deform. In order to prevent such an adverse effect, in this modification, the cross-sectional area of the heel portion supporting elastic member 4a is reduced (a space is provided) to facilitate elastic deformation.

Further, it is preferable that the shape between the heel portion of the bottom surface of the bottom member and the fulcrum 5 is substantially linear or dented upward when viewed from the side when a load is applied. For example, as shown in FIG. 4, the heel region of this modification is an example in which it is slightly recessed upward. If it is unavoidable that a loose downward projection is formed for convenience of design, this heel region is liable to form bubbles or perforations so that it is likely to be substantially straight when viewed from the side when loaded, though not shown here. , At least one of a void, a recess, or a soft material is provided to facilitate the recess,
The result is a straight line. As shown in FIG.
Formed substantially linearly as shown in (a), or FIG.
As shown in FIG. 1, the rear end of the bottom surface of the heel area and the fulcrum 5 are both horizontal as shown in FIG. 1 at the start of landing. It is stable in contact with the front and back and never swings back and forth. This is a significant difference from the conventional rocker shoe.

FIG. 2 (a) shows the "second state" in which the weight gradually shifts and the weight is supported by the fulcrum 5, and the weight is mainly the human lower calcaneus lower end 20 and the metatarsal head 30.
And the lower end thereof is supported by the balance member 8 in a balance shape, and the load is concentrated on the fulcrum 5.

The distance from the rear end of the shoe body to the fulcrum 5 is 50% of the total length of the shoe body, measured parallel to the line connecting the center of the calcaneus and the second metatarsal head. . In reality, 30% is sufficient if the doctor can explain the function to the patient and the patient can understand it well and can walk properly from the heel to the ground. 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 presence of such misused patients, the fulcrum 5 was set to be advanced further. Set the position of the fulcrum 5 to 35%, 40%, 45
%, 50%, but the presence of misused patients decreased as the value increased. In the experiment, there was no misuse patient because it was set to the position of 50%. Therefore, the above fulcrum 5
The position was tried to be 60% and 65%. As a result, the knee stretching effect increases as the value increases, but the patient complains that he / she is prone to fatigue in proportion to the increase in the value. Since there are individual differences among patients, the position of the fulcrum 5 will be determined depending on what kind of patient is targeted. If an average value design that can be shared by various patients is attempted, the position of the fulcrum 5 is set in the range of 35% to 65%, for example, 40% to 40%.
60% range is safe, preferably 45% to 55%
Set to the range of. This is remarkably different from 37% in the case of the "toe walking shoe for muscle training" of the above-mentioned conventional example 2. The reason for this is that the present embodiment is intended to "prevent walking of the toes" of a sick person, and the purpose is completely contrary to the "toe walking shoes" as in the conventional example 2 described above.

FIG. 2 (b) shows the "third state" in which the weight is carried on the substantially linear portion between the bottom material lower surface 7 of the second metatarsal head 30 and the fulcrum 5. Show. 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. Therefore, the movement from the "second state" to the "third state" is merely an operation of tilting the balance. There is little resistance.

The reason why the resistance to the movement from the "second state" to the "third state" is small is that, as shown in FIG. 2 (b), the lower sole 7 of the metatarsal head and the fulcrum 5 are 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 FIG. 6, a curve 5f is formed between the lower surface 7 of the shoe sole of the metatarsal head and the fulcrum 5 and projects gently from the side,
As shown in FIG. 7, the front of the fulcrum 5 functions like a loose roller, and the grounding point moves to the front 5f while rolling like a roller, and if it rolls, the grounding point further moves forward and walks. Make it difficult. Originally, the position of the fulcrum 5 is set to the best position according to the request from the patient and the judgment of the doctor, and it is preferable that the 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 substantially linear or recessed upward when viewed from the side when a load is applied (example FIG. 8). Is preferred.

As another modification (not shown), at least one of bubbles, perforations, cavities, recesses or soft materials is provided between the bottom surface 7 of the bottom member and the fulcrum 5 to make a straight line by denting with a load. You may do it.

As described above, between the bottom material lower surface 7 and the fulcrum 5, the case where the bottom material lower surface 7 and the fulcrum 5 are substantially brought into the state of FIG. The "first state" to the "second state" are commonly applied to the case of forming the shape from FIG. 2 (b) from the beginning and the case of forming the shape having an upward recess as shown in FIG. It has been confirmed by an experiment in a sick person that the transition to the "third state" after that is an easy operation in which the tilt of the balance simply changes into a seesaw shape.

The fulcrum 5 (ridge line 5-5) is, as shown in the figure,
It is functionally necessary to form a corner to act as a fulcrum. Although this angle 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 shoe having a normal heel is worn.
The heel is slightly raised as compared with the first and second states. This state is opposite to the state in which the Achilles tendon was forcibly pulled as described in Conventional Example 1, and it is possible to gently move to the next "fourth state" (kicking out) without pulling the Achilles tendon. Thus, without pulling the Achilles tendon, it is easy to move to the "fourth state" (kicking out)
The “third state” is hereinafter referred to as the “high heel type bed leaving preparation state”. The present invention is based on the principle of lowering the heel. However, even with such a low heel, it is possible to prevent the Achilles tendon from being forcibly pulled "high heel type bed preparation state". Prevents or corrects the occurrence of bent implantation habits of the knees found in normal patients with knee osteoarthritis, in other words, bad implantation habits such as stretched Achilles tendon, thereby preventing the disease. Effective in preventing progression and reducing pain.

FIG. 2 (c) shows the "fourth state" in which the weight of the person gradually moves forward and kicks the ground with his fingertips. At this time, the void 3f is provided to facilitate bending of the bottom material, and flexibly bends to facilitate kicking out.

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 and the heel portion supporting elastic member 4 are used.
The explanation of the rear end e of the lower surface of a is made by ignoring the existence 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 formed integrally with the bottom material front region 3 and / or the heel portion supporting elastic member 4a. 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 the decorative heel member are formed. 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.

[Footwear Behavior of Example 1] With the structure shown in the above example, when landing is started, as shown in the "first state" in FIG. 1, the center 50 of the ankle and the lower end of the calcaneus d. The line connecting to and (the hypotenuse R4 shown in FIG. 1) is the vertical line χ-χ
1 and 23, the calcaneus lower end d is located 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 toes raised in this way (the front part 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 lost by the "knee joint non-flexing effect", by providing the impact absorption means as described above, it is possible to absorb the natural impact absorption. Beyond the function, it is possible to provide a shock absorbing function that is gentle to the sick.

Next, in the "second state" shown in FIG. 2 (a), the weight is carried by the balance member 8 in a balance-like manner at the fulcrum 5, so that even a sick person with a weak leg muscle can easily perform the "first state". Status"
Can shift to this "second state", and can easily shift to the next "third state" without any resistance.

In the "third state" (high heel type bed preparation state) shown in FIG. 2 (b), the person approaches a state in which he / she wears an ordinary heel shoe, and the [problem to be solved by the invention] ] The Achilles tendon is released from the pulled state as described in [. In this way, we can easily move to the "third state",
The unreasonable stretching of the Achilles tendon when leaving the bed as shown in FIG. 18 described in the first conventional example does not occur, and even if it is continuously used, the conventional harmful effect of stretching the Achilles tendon does not occur. Therefore, it is possible to design an ideal lifting angle in the first state without worrying about the adverse effect caused by the excessive pulling of the Achilles tendon.

In the "fourth state" shown in FIG. 2 (c), kicking is performed, but a space 3f is formed on the metatarsal head of the shoe sole.
By providing, the shoe sole can be easily bent when kicking out, and kicking out can be facilitated.

Example 2. In addition to the effect of the above-described embodiment, a second embodiment having an inclined surface inside the footwear will be described so that the varus knee (valgus knee) can be further corrected. The setting of the inclined surface is known. It is also known that the effect is insufficient. The second embodiment is the same as the one described in the first embodiment.
With the cooperation of "saw-like rocking" and "the turning angle of the ridge line set on the bottom of the bottom material", it is possible to obtain a remarkable effect as a synergistic effect of the three, especially for O-leg patients. is there.

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 of 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.

The reason why the inclined surface is formed is well known, and the explanation will be simplified. As an example in the case of osteoarthritis of the knee, a varus knee (O leg, crotch of the knee) will be described. 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 this method is insufficient, the effect is recognized.

In the above description, the example of the valgus knee is explained. However, in the case of the valgus knee, the outer side is read as the inner side and the inner side is read as the outer side in the above description, and the inclined surface is also inclined in the opposite direction. Is omitted.

Although the inclined surface is formed by the upper layer member 9 made of an elastic material in this embodiment, the upper layer member 9 may have a uniform thickness and the upper surface of the shoe sole may be inclined instead.

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-described 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 a softness that elastically deforms even with a light initial impact of 1 kg and a strong shape holding function capable of withstanding a heavy static load of 70 kg and holding a 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. This area Q is 1 k compared to other areas due to a large number of bubbles not shown.
Lower end of the human heel (eg 1 cm ² area) even with a load of g
Although the upper layer member 9a located at is softened so as to be easily elastically deformed, it may be softened by providing perforations, cavities, recesses or the like in place of the large number of bubbles, or as compared with the internal member 9. The region Q may be formed using a softer material.

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

Example 3. When an experiment was conducted using the shoe of Example 2 described above, it was unexpectedly encountered that the effect of the inclined surface could not be obtained, 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. This phenomenon cannot be noticed unless observed carefully, but this is a fatal phenomenon in the case where the heel portion supporting elastic member 4a is made of a particularly soft material. Such a phenomenon that the heel-supporting elastic member 4a does not descend evenly left and right and a large amount of the heel-supporting elastic member on the high side of the inclined surface descends 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 shoe sole just above the bottom face cover material 3c along the 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 and providing a difference between the cross-sectional area of 4n and the cross-sectional area of 4r, the force in the bad direction described in the previous section is prevented from acting to bend the axis aa. This is an example of providing a difference in the size of the void, but instead of the size of the void, not shown, a recess, a bubble, a hole, etc. You may make it easy to descend. Also, as shown in FIG. 14, even if the heel portion supporting elastic member 4a is formed of a material S that is elastically deformed (soft) on the affected part side with a weak force, and is formed of a material H that is hard to elastically deform (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.

By thus constructing the heel part supporting elastic member 4a and forming the heel region, the "soft heel supporting elastic member" which is the basic structure 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 4. In this embodiment, the heel portion supporting elastic member 4 is used.
With respect to the design of the shock absorbing function of a, the present invention seeks to tolerate the expected range of the expected value of the human body weight. 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. This embodiment solves that problem.

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 figure, the shape of the ground contact surface below the heel portion supporting elastic member 4a is located between the side portions 4S, 4s and the side portions 4S, 4s which are respectively located laterally and contact the ground when viewed from the rear. , The inner part 4h that does not substantially contact the ground when there is no load
It is formed by. For example, in the case of a light-weight person with a weight of 35 kg, the two side portions 4S, 4s have a small ground contact area, so that they are fully deformed and compressed in the first place to absorb the landing impact of a light-weight person. As a result, the inner portion 4h comes into contact with the ground to form a flat bottom surface as shown in FIG. 24 (b). In this way, when a load is further applied on the state where the inner portion 4h is in contact with the ground as a flat surface (for example, in the case of a weight of 70 kg), the total area of the inner portion 4h and the side portions S and s is large. Since the weight is supported (for example, four times the ground contact area as in the case of FIG. 24 (a)), the carrying force is large and it is not easily deformed. Therefore, it can bear a heavy weight, for example, 70 kg. Therefore, in the case of a 35 kg person who weighs lightly, it is easily deformed only by the side parts S and s, and in the case of a person who weighs heavily, as shown in FIG. It is strong and the descent dimension does not become excessive. Since the high side of the slope described in Examples 2 and 3 receives a large load, the section S carrying the high side has a larger cross-sectional area than the section s carrying the low side so as to withstand the large load. It is preferable. When the cross section is formed as in this embodiment, since the ground contact area is small, it is substantially elastically deformable. Therefore, the heel portion supporting elastic member 4a is the same as that of the first embodiment.
It is made of a material having a higher hardness than the case.

Example 5. Embodiment 5 shows an embodiment having the functions of the above-mentioned embodiments and having an instep close to a slipper so that it can be easily put on and taken off. FIG. 25 is a vertical cross-sectional view showing the footwear according to the fifth embodiment of the present invention, and shows a state in which the weight is applied to the heel part similarly to FIG. 1 in the case of the first embodiment. FIG. 26 (a) shows the appearance of the footwear shown in FIG. 25 when there is no load, and FIGS. 26 (b) and (c) are cross-sectional views taken along the chain line of FIG. 26 (a) taken along the line uu. It is a figure. 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 reinforcing member 6, and the heel portion supporting elastic member 4 described in each of the above-described embodiments.
a, the bottom material front region 3 (not shown), and the balance member 8 (not shown) are covered with a covering material (not shown) to form a footing material 3g. Reference numeral 2b indicates the upper of the slipper, and 2c indicates the lower end of the upper. In order to simplify the structure, the insole 3m and the reinforcing member 6 may be omitted. The structure in which the balance member 8 is omitted is described in the first embodiment with reference to FIGS. 5 (a) and 5 (b). Further, the means described in the first, second, third, and fourth embodiments, such as inclining the upper surface of the bottom material instead of inclining the upper surface of the upper layer member 9, are also incorporated in the fifth embodiment.

Below the footing material 3g, there is provided a bottom cover material 3c in which a synthetic resin foam material is exposed without being covered with a covering material. Instep 2b, stepping material 3g, bottom cover material 3c
There are various methods other than the sewing method shown in FIGS. 26 (b) and 26 (c), but the connection is not limited to this method because they are not essentially related to the function. .

[0124]

As described above, according to the present invention, in the footwear in which the main body of the footwear comprises the sole and the instep, which is used for patients with knee osteoarthritis, the sole is a fulcrum provided on the bottom surface and its fulcrum. Front and rear regions of the bottom member and swinging in a seesaw shape, the bottom member having a second metatarsal head in a state where a load is applied to the heel part. The thickness of the bottom material in the front area of the bottom material is formed so that the front part is thinner than the fulcrum part so that the bottom surface of the material rises above the horizon, and further, it is located on the ground contact surface of the human heel. At least a part of the area to be provided is provided with an impact absorbing mechanism made of an elastic material.
It is possible to obtain the "knee extension effect" and "supporting effect close to the vertical line" that occur at the start of landing. On the other hand, a shock-absorbing mechanism that compensates for the "loss of natural shock-absorbing function" that occurs as a side effect of the above "support effect close to the vertical line" is provided as described below. Thus, the above side effects can be prevented.

Further, according to the present invention, in the footwear for patients with knee osteoarthritis, the body of the footwear comprises a sole and an instep, and the sole is located at a ridge line crossing the bottom surface and before and after the ridge line. Consists of a front part of the bottom material and a rear part of the bottom material. The ridge line is a line connecting the center of the calcaneus and the second metatarsal head so that the ridge line on the little finger side is more advanced than the ridge line on the thumb finger side. The thumbs are greatly lowered in the "third state" and the "fourth state" because they are turned to intersect with each other, so that concentrated load on the thumbs is prevented, which is particularly effective for patients with O-legs. .

Further, in the present invention, in the footwear for patients with knee osteoarthritis, the shape of the bottom material lower surface when both ends of the ridge line are arranged at the same height is that the shape of the bottom material is below the second metatarsal head. The contour line passing through the located point is formed so that the little finger side is advanced as compared to the thumb side, by turning and intersecting the line connecting the center of the calcaneus and the second metatarsal head and intersecting, This effect is enhanced, and particularly, the effect of the O-leg described later on the patient is enhanced.

Further, in the present invention, in the footwear for patients with knee osteoarthritis, the contour line located between the contour line and the front end of the sole is a line connecting the center of the calcaneus and the second metatarsal head. Since the bottom material bottom surface is formed so that it turns and crosses with respect to it and the little finger side moves forward as compared to the thumb side, the effect described in the preceding paragraph is enhanced, and particularly the effect of the O-leg described later on the patient is enhanced. Strengthen.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the shock absorbing mechanism provided on the surface contacting the heel of the human has a shock absorbing function of absorbing a shock when the human knee bends. In place of or beyond, a member made of a material having an elastic force capable of absorbing impact is formed in the area of the bottom material located on the ground contact surface of the human heel. It is possible to compensate for the "loss of natural shock absorption function" that naturally occurs as a side effect of "close support effect" and to walk easily.

In the footwear for knee osteoarthritis according to the present invention, at least a part of the impact absorbing mechanism provided on the bottom material of the area of the ground contact surface of the human heel is elastic. A heel supporting elastic member made of a material and / or an upper layer member made of an elastic material provided on an upper part of the bottom material, and contacting the human heel by elastic deformation of the heel supporting elastic member and / or the upper member Since the surface of the upper layer member descends, it is possible to compensate for the "natural loss of shock absorption function" that occurs as a side effect of the "support effect close to the vertical line". .

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 portion supporting elastic member in the front-rear direction is measured at the center of the bottom width, and Since it is located in front of the rear end of the ground contact surface, the above-mentioned "support effect close to the vertical line" can be obtained.

Further, in the present invention, in the footwear for patients with knee osteoarthritis, the rear of the lower surface rear end of the heel-supporting elastic member is a decorative member which is more easily elastically deformed than the heel-supporting elastic member. Since it has a heel shape forming member, despite the fact that the rear end of the bottom surface of the heel is substantially positioned at a special position for obtaining the above-mentioned "support effect close to the vertical line". The appearance of the heel part can be made to look like normal footwear.

According to the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the shape of the rear bottom surface of the lower surface rear end of the heel-supporting elastic member is formed as an ascending slope so as to gradually move backward from the ground. Therefore, the rear part from the rear end of the lower surface of the heel portion supporting elastic member is not grounded. Therefore, it is possible to obtain the above-mentioned "support effect close to the vertical line".

In the present invention, in the above-mentioned 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. Support, from "first state" to "fourth state"
It is possible to smoothly perform the operation of inclining in the state of ".

Further, in the present invention, in the above-mentioned 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, it is possible to ensure the above-described action of supporting the weight in a balance.

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, the heel portion supporting elastic member and the decorative heel shape forming member is: Since it is formed by at least one of the difference in the size or the number of the shapes of the bubbles, perforations, voids and recesses, and the difference in the cross-sectional area or the elasticity of the material, the impact absorbing function and the weight carrying function described above. And the elastic function of the decorative heel shape forming member can be properly formed.

Further, in the present invention, in the above-mentioned footwear for patients 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. Forming an inclined surface that lowers to the left on the upper part of the bottom material and guiding the left and right axial directions of the bones connecting the joints vertically to the direction of protecting the affected side of the knee joint is not well known. It is also well known that In the present invention, due to the synergistic effect of the inclined surface, the above-mentioned seesaw-like swing, and the above-described turning angle of the bottom ridge, an effect which cannot be obtained only by the known inclined surface is obtained. The
In particular, a marked effect can be obtained in patients with O-legs.

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 the elastic material provided on the upper portion of the bottom member, the landing is performed in addition to the above-described action. Can absorb the shock of time.

Further, in the present invention, in the above-mentioned footwear for a patient with knee osteoarthritis, the inclined surface is a part of this inclined surface, and the area portion for supporting the heel of a human is different from that of the inclined surface. Since it is formed so as to be easily elastically deformed in part as compared with the region, it is possible to absorb a small initial impact at the time of landing in addition to the above-mentioned action.

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 footwear for patients with knee osteoarthritis according to the present invention, the heel-bearing elastic member that carries the lower side of the inclined surface is the heel-bearing elastic member that carries the higher side of the inclined surface. Since a difference in elastic force between the low-side supporting elastic member and the high-side supporting elastic member is provided so that the lower side supporting elastic member and the higher side supporting elastic member may be more easily lowered, the "unequal descent phenomenon of a heel" which occurs as a side effect of setting the inclined surface. Can be prevented.

Further, in the present invention, in the above-mentioned footwear for patients with knee osteoarthritis, the difference in elastic force of the heel part supporting elastic member between the lower side and the higher side is caused by bubbles, perforations, voids and recesses. Since it is formed by at least one of the difference in the size or the number of the shapes, 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. .

According to the present invention, in the footwear for patients with knee osteoarthritis, the shape of the bottom material bottom surface between the bottom surface of the bottom material on which the second metatarsal head is located and the fulcrum is the side 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.

In the present invention, in the 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. 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 shape of the ground contact surface located below the heel part 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. It absorbs impact and, in a heavy person, the inner part is also added to carry the weight, so it does not undergo excessive elastic deformation, and the tolerance is increased so that it can be used in common by both a light weight person and a heavy weight person. be able to.

In the footwear for patients with knee osteoarthritis according to the present invention, the impact absorbing function may be formed by an impact absorbing material in place of at least a part of the impact absorbing mechanism. it can. Even in that case, the impact at the time of landing can be absorbed together with or instead of the impact absorption by the elastic material.

[Comprehensive Effect] The above-described functions and actions are completely physical and prevent wear of the joint affected area due to friction, so that the disease can be prevented from progressing if used regularly. 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 patient with knee osteoarthritis according to the first embodiment of the present invention. FIG. 2 is a “second state” when walking with footwear for a knee osteoarthritis patient according to the first embodiment of the present invention.
2 (a), a "third state" (FIG. 2 (b)), and a "fourth state" (FIG. 2 (c)) . FIG. 3 is a longitudinal sectional view showing footwear for a patient with knee osteoarthritis according to the first embodiment of the present invention (FIG. 3 (a)).
), An external view (FIG. 3 (b)), and a bottom view of the footwear as viewed from the bottom (FIG. 3 (c)). FIG. 4 is a vertical cross-sectional view showing a modified example of the footwear for a patient with knee osteoarthritis according to the first embodiment of the present invention). FIG. 5 is a longitudinal sectional view showing a modified example of the footwear for a knee osteoarthritis patient according to the first embodiment of the present invention ((
(a)) and a horizontal cross-sectional view of the foot sole just above the bottom cover material of this footwear (Fig. 5 (b)). FIG. 6 is a vertical cross-sectional view illustrating the function of footwear for a knee osteoarthritis patient according to the first embodiment of the present invention. FIG. 7 is a vertical cross-sectional view illustrating the function of footwear for a patient with knee osteoarthritis according to the first embodiment of the present invention. FIG. 8 is a vertical cross-sectional view showing a modified example of the footwear for patients with knee osteoarthritis according to the first embodiment of the present invention. FIG. 9 shows the second embodiment of the present invention.
FIG. 6 is a plan view of an upper layer member of footwear for a knee osteoarthritis patient according to the embodiment of FIG. 10: is sectional drawing (FIG. 10 (a)), bb sectional view (FIG. 10 (b)), cc sectional view (FIG. 10 (c)) of the upper layer member aa of FIG. FIG. 11 is an explanatory diagram showing a joint of a patient. FIG. 12 is an explanatory diagram showing joints of a patient. FIG. 13 is a horizontal cross-sectional view of the bottom of the sole just above the bottom cover of the footwear for patients with knee osteoarthritis according to the third embodiment of the present invention. 14
FIG. 14 is a horizontal cross-sectional view of a bottom material bottom portion immediately above a bottom surface cover material showing a modification example of FIG. 13. FIG. 15 is a longitudinal sectional view showing footwear for a knee osteoarthritis patient according to the first embodiment of the present invention. FIG.
[Fig. 16] is an explanatory view for explaining the operation of Fig. 15. FIG. 17 is a vertical cross-sectional view showing a shoe of the prior application. FIG. 18: is a side view which shows the external appearance of the conventional shoe. FIG. 19 is a side view showing the appearance of a conventional shoe. FIG.
[FIG. 4] is an explanatory view for explaining an action of a force applied to a human heel on a knee. FIG. 21: is explanatory drawing explaining the effect | action of the conventional high heel shoe. FIG. 22: is explanatory drawing explaining the effect | action of the conventional shoe of a low heel. FIG. 23 is an explanatory diagram 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 the footwear for patients with knee osteoarthritis according to the fourth embodiment of the present invention, which carries the lower heel of the human heel, and is unloaded (FIG. 24 (a)) and loaded. (Fig. 24
(b)). FIG. 25 is a longitudinal sectional view showing footwear for a patient with osteoarthritis of the knee according to the fifth embodiment of the present invention. FIG. 26 shows footwear for a patient with knee osteoarthritis according to a fifth embodiment of the present invention, showing a side view (FIG. 26 (a)) showing the appearance and a cross-sectional view of FIG. 26 (a) (FIG. 26). (b) and 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 material on which metatarsal bone is located,
8 balance member, 9 upper layer member, 20 human heel part, 30
Human metatarsal head, 50 center of ankle, 106
Affected area.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kumiko Isaka 41 Kannonji-cho, Izumi City, Osaka Prefecture

Claims (23)

[Claims] 1. A footwear consisting of a sole and a shoe-shaped upper cover, which is used for a patient suffering from osteoarthritis of the knee, wherein the sole is located on a fulcrum provided on the bottom surface and in front of and behind the fulcrum. The bottom surface of the bottom material, in which the second metatarsal head is located, is lifted from the horizon with the front part of the bottom material and the rear part of the bottom material swinging in a seesaw shape. As described above, the thickness of the bottom material in the front part of the bottom material is formed so that the front part is thinner than the fulcrum part, and further, the region located on the ground contact surface of the human heel has at least one of them. Footwear for patients with knee osteoarthritis, characterized in that the part is provided with a shock absorbing mechanism made of an elastic material. 2. A footwear consisting of a bottom material and a shoe-shaped upper cover, which is used for a patient suffering from osteoarthritis of the knee, wherein the bottom material has a ridge line crossing its bottom surface and bottoms located before and after the ridge line. Consists of a timber front region and a bottom timber rear region, and the ridge line with respect to the line connecting the center of the calcaneus and the second metatarsal head so that the ridge line on the little finger side is more advanced than the ridge line on the thumb side. Footwear for patients with knee osteoarthritis, characterized in that they are swiveled and intersected. 3. The footwear for a patient with knee osteoarthritis according to claim 2, wherein the bottom material bottom surface has a shape below the second metatarsal head when both ends of the ridge line are arranged at the same height. The contour line passing through the point located at is pivoted and intersects with respect to the line connecting the center of the calcaneus and the second metatarsal head, and the little finger side is formed to be advanced as compared to the thumb side. Footwear for knee osteoarthritis patients. 4. The footwear for a patient with knee osteoarthritis according to claim 2, wherein the contour line located between the contour line and the front end of the sole is a line connecting the center of the calcaneus and the second metatarsal head. Footwear for patients with knee osteoarthritis, characterized in that the bottom surface of the bottom material is formed so that the little finger side moves forward with respect to the thumb side, while turning and crossing. 5. 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
A member made of a material that has an elastic force capable of absorbing a shock in place of or beyond the shock absorbing function of bending the knee of a human and absorbing the shock is a bottom member located on the ground contact surface of the human heel. Footwear for patients with knee osteoarthritis, characterized in that it is formed in the region of. 6. The footwear for patients with knee osteoarthritis according to claim 1 or 5, wherein the impact absorbing mechanism is provided on at least one of bottom materials provided in a region located on a ground contact surface of a human heel. A heel part supporting elastic member made of an elastic material and / or an upper layer member made of an elastic material provided on an upper part of the bottom material, and the human heel part due to elastic deformation of the heel part supporting elastic member and / or the upper layer member. Footwear for patients with knee osteoarthritis, characterized in that the surface of the upper layer member in contact with the lower part descends. 7. The footwear for patients with knee osteoarthritis according to claim 1, 2 or 6, wherein the position of the rear end of the lower surface of the heel portion supporting elastic member in the front-rear direction is
Footwear for patients with knee osteoarthritis, characterized in that it is located anterior to the rear end of the ground contact surface of the human heel, measured at the center of the bottom width. 8. The footwear for patients with knee osteoarthritis according to claim 7, wherein the rear of the lower surface rear end of the heel-supporting elastic member is elastically deformed more easily than the heel-supporting elastic member. Footwear for patients with knee osteoarthritis, characterized in that the footwear comprises a static heel shape forming member. 9. The footwear for patients with knee osteoarthritis according to claim 7, wherein the shape of the rear bottom surface of the rear end of the lower surface of the heel-supporting elastic member is an upward slope so as to gradually move backward from the ground. Footwear for patients with knee osteoarthritis characterized by being formed. 10. The footwear for patients with knee osteoarthritis according to claim 1 or 2, wherein the sole material has a balance member for supporting the weight in a balance-like manner. Footwear for patients with knee osteoarthritis. 11. Footwear for a knee osteoarthritis patient according to claim 10, wherein the balance member has a length that substantially reaches the position of the front part of the metatarsal bone from the front part of the human heel. Footwear for patients with knee osteoarthritis characterized by: 12. The footwear for patients with knee osteoarthritis according to claim 6 or 10, wherein the elastic force of the heel-supporting elastic member can be elastically deformed more easily than the balance member. Characteristic footwear for patients with knee osteoarthritis. 13. The footwear for patients with knee osteoarthritis according to claim 1, wherein a difference in elastic force between the balance member, the heel-supporting elastic member, and the decorative heel shape forming member is different. , Bubbles,
For the patients with osteoarthritis of the knee characterized by being formed by at least one of the difference in size or number of perforations, voids and recesses, and difference in cross-sectional area or elasticity of material. footwear. 14. The footwear for patients with knee osteoarthritis according to claim 1 or 2, wherein the affected part of the knee joint is lowered from left to right when viewed from the rear, or right to left. Footwear for patients with knee osteoarthritis, characterized in that an inclined surface which becomes extremely low is formed on the upper part of the sole material. 15. The footwear for patients with knee osteoarthritis according to claim 14, wherein the inclined surface is formed on an upper layer member made of an elastic material provided on an upper part of the bottom material. Footwear for patients with illness. 16. The footwear for a patient with knee osteoarthritis according to claim 14, wherein the inclined surface is a part of the inclined surface, and an area portion for supporting a heel of a human is different from that of the inclined surface. Footwear for patients with knee osteoarthritis, characterized in that it is formed so as to be elastically deformable partially compared to the region. 17. The footwear for patients with knee osteoarthritis according to claim 16, wherein the difference in partial elastic force of the inclined surface is the 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 material elasticity. 18. The footwear for knee osteoarthritis patients according to claim 14, wherein the heel part supporting elastic member carrying the lower side of the inclined surface is the heel part carrying elastic member carrying the higher side of the inclined surface. Footwear for patients with knee osteoarthritis, characterized in that a difference in elastic force between the low-side supporting elastic member and the high-side supporting elastic member is provided so that the lower side supporting elastic member and the higher side supporting elastic member are different from each other. 19. The footwear for patients with knee osteoarthritis according to claim 18, wherein the difference in elastic force of the heel-supporting elastic member between the lower side and the higher side is due to air 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 the size or the number of the shapes, a difference in the cross-sectional area, or a difference in the elasticity of the material. 20. Footwear for a patient with knee osteoarthritis according to claim 1, wherein the shape of the bottom material bottom surface between the bottom 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, characterized in that it is formed into a shape that is substantially straight or recessed upward when viewed from the side. 21. The footwear for patients with knee osteoarthritis according to claim 1, wherein the bottom material bottom surface between the heel and the fulcrum has a substantially linear shape when viewed from the side when loaded. Or footwear for patients with knee osteoarthritis, characterized by being formed in a shape that is recessed upward. 22. Footwear for a patient with knee osteoarthritis according to claim 1, 6 or 14, wherein the shape of the ground contact surface located below the heel-portion elastic member is the side when viewed from the rear side, respectively. For patients with knee osteoarthritis, characterized in that it is formed by both side portions located toward the ground and contacting the ground, and an inner portion located between the both sides and not substantially contacting the ground when there is no load Footwear. 23. The footwear for patients with knee osteoarthritis according to claim 1, wherein the shock absorbing function is formed by a shock absorbing material in place of at least a part of the shock absorbing mechanism. Footwear for patients with knee osteoarthritis characterized by: