JPH01155846A - Shoes for knee arthropathia patient - Google Patents

Abstract

PURPOSE:To allow the inside and the outside to wear out while keeping a balance between them, by making the length of an abrasion resistant material constituting the ground contact surface of the heel large on the outside of a shoe and small on the inside thereof. CONSTITUTION:The vicinity of front of the point where the extension line X-X of a knee bone axis crosses the bottom surface of the heel is set to a reference point H and a heel part is notched so as not to protrude from the line A-A connecting the under surface of the rear end of a shoe and the reference point H. The angle alpha of the line A-A crossing the surface of the ground is set to 20 deg. or more and the rear end of the shoe is constituted so as to have strength sufficient to support one's body wt. in a cantilevered fashion. The dimension of the abrasion resistance material 3 constituting the ground surface of the heel is made different in the outside E and inside I of the shoe 1 so that the depth (e) on the outside E is made large and the depth (i) on the inside I is made small. As a result, it is prevented that the outside of the heel of the shoe for a knee arthropathia patient is precedently worn out, and the inside and the outside thereof can be worn out equally while the balance therebetween is kept.

Description

[Detailed description of the invention] 【Technical field】

It has a structure that equalizes the progress of wear on the rear ground-contacting part of shoes for knee arthropathy patients, reducing the difference in wear between the outer and inner parts of the ground-contacting part due to "toe out".

[Prior art]

Patent application filed in 1983 by the same applicant as the present invention as a prior application of the present invention
2-231685.62-251083゜Patent Application 62-2
69818. There is a patent application No. 62-168246゜ (hereinafter referred to as the "prior application"), in which the point near or in front of the point where the extension line X-x of the knee bone axis intersects with the bottom surface of the heel is used as a base point, and the lower surface of the rear end of the shoe and H are The heel is notched so that it does not protrude beyond the connecting line A-A, the angle α at which the line A-A intersects with the ground surface is 20 degrees or more, and the rear end of the shoe is provided in a cantilever shape strong enough to support the body weight. In consideration of the case where the patient is "toe out", it is necessary to provide the grounding end with the outer side closer to the front. In order to maintain the angle α, the height of the heel increases as the ground contact edge moves forward. If possible, it is desirable to avoid the heel from being too high, both in terms of aesthetics and aesthetics.

[Problems to be solved]

In order to prevent the heel from becoming too high, it is best to provide the ground contact edge perpendicular to the longitudinal direction of the shoe, but in this case the heel wears out first from the outside. In some cases, women do not have "Sotowa", but even in that case, the end of the heel bone is located deviated to the outside, and as a result, the outside of the heel wears out first, and the inside of the heel wears out first, just as in 11 "Sotowa". If possible, it is desirable that wear progresses while maintaining balance between the inside and outside of the heel, with no major difference.

[Means to solve the problem]

The wear resistance of the ground-contacting part of the heel is set to be different between the inner side and the outer side, so that even if the calcaneus is biased to the outside, the inner side and the outside wear out while maintaining a balance.

Embodiment 1 FIG. 1 is a sectional view of a shoe according to the present invention. FIG. 2 is a cross-sectional view taken along the chain line Y-Y in FIG. The heel is cut out so as not to protrude from the line A-A connecting the lower surface of the rear end of the shoe 1 and H, with the base point near or in front of H, and the angle α at which the line A-A intersects with the ground surface is 20 degrees or more, The rear end of the shoe should be strong enough to support the weight in a cantilevered manner. The contact surface of the heel is made of a wear-resistant material, and the edge H is provided so as to constitute, for example, a ridge line perpendicular to the longitudinal direction of the heel. When installed as described above, the outside of the heel wears out faster than the inside, causing the heel to lose its levelness and become slanted. This results in a negative impact on the patient. In this embodiment, in order to maintain a balance between the wear rates on the inside and outside of the ground contact surface, the depth e of the outside E is set large, and the depth i of the inside I is set small. the result. The outer side has a larger ground contact area, and the inner side has a smaller ground contact area. By appropriately selecting and providing the depths e and i, the ground contact area changes, and the patient's heel bone end may be biased to the outside.
Even when the heel is "soft", it is possible to prevent the occurrence of wear that is biased toward the outside, balance the wear on the outside and the inside, and adjust the heel so that it wears horizontally.

Embodiment 2 In FIG. 3, a large number of holes 4 are provided in the wear-resistant material 3 of the heel contact surface 2, and the holes are larger on the inside and smaller on the outside. The inside of the hole 4 may be hollow,
Alternatively, it may be filled with a material other than a wear-resistant material.As a result, as in the first embodiment, the outer side has a large ground contact area, and the inner side has a small ground contact area. Instead of the size of the holes 4, the distribution density of the holes 4 (the number of holes per unit area) may be set coarsely or densely, with fewer holes distributed on the outside and more holes distributed on the inside. Figure 4).

[Example 3] In the fifth @, the heel contact part 2 is composed of a solid piece, and the outermost piece a is a wear-resistant material, followed by a wear-resistant material. The innermost section d is composed of the least wear-resistant material. The number of fragments is arbitrary, and the abrasion resistance may be changed steplessly not in fragments but continuously. In addition to changing the contact area as mentioned above, the wear resistance can be changed. Any method such as material, mixture, foaming, etc. may be used. Through each of the above embodiments, even with the above-described configuration, patients' habits vary depending on the individual, and the patient's habits may be different than expected.
Some people walk slowly. Since the shoes of the prior application and the present invention are medical devices, they are sold with an instruction manual containing precautions for use. It is desirable to illustrate and explain whether the design was based on the fingertip angle (toe) and to instruct the patient to walk with a fingertip angle (toe) close to that standard. Use different insoles for the affected side (for example, the right foot) and the affected side (for example, the left foot).The healthy side should be provided with a pressure-resistant insole that supports the body weight, and the affected side should be provided with a cushioning insole that is dented by the weight. Alternatively, the insole can be prepared separately and inserted over the counter at the patient's request.It is convenient to make the insole the same shape for the left and right sides.[Effect 1: Shoes for patients with knee arthrosis] This prevents the outside of the heel from wearing out first, and the inside and outside of the heel wear out in a balanced manner, keeping the left and right sides horizontal.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the shoe of the present invention, and FIGS. 2 to 5 are sectional views of essential parts in the direction of the chain arrow in FIG. 1. 1... Shoes, 2... Ground contact surface, 3. Old... Abrasion resistant material. 4......hole, E......outside, ■1 old...inside. Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. With reference point H near or in front of the point where the extension line X-X of the knee bone axis intersects with the bottom surface of the heel, it does not extend beyond the line A-A connecting H with the lower surface of the rear end of the shoe. Cut out the heel part as shown, and mark line A-
The angle at which A intersects with the ground surface is 20 degrees or more, the rear end of the shoe is strong enough to support the body weight in a cantilever shape, and the dimensions of the wear-resistant material that makes up the contact surface of the heel are on the outside and inside of the shoe. Shoes for knee arthropathy patients, which are different from the previous model, have a larger depth on the outside and a smaller depth on the inside. 2 A large number of holes are provided in the wear-resistant material that makes up the contact surface of the heel,
Shoes for knee arthropathy patients according to claim 1, wherein the size of the holes or the distribution density of the holes is small on the outside and large on the inside. 3. Claims 1 and 2 provide that the material of the wear-resistant material constituting the contact surface of the heel is different between the outside and inside, and the wear resistance of the inside material is inferior to that of the outside material. Shoes for patients with knee arthrosis as described.