JP2021126444A - insole - Google Patents

Abstract

To provide an insole capable of preventing sufficiently a metatarsal bone from tilting to the inside.SOLUTION: An insole, which is an insole having a shape approximately along a contour of the footwear inside, and formed of a natural or artificial rubber material, is provided with a medium repulsion cushion in a range corresponding to a thenar rear part. As a result, hallux valgus can be prevented effectively, and progression of hallux valgus can be prevented by a very simple constitution.SELECTED DRAWING: Figure 1

Description

The present invention relates to footwear insoles.

The arch of the foot. It is supported by muscles and ligaments, along with the shape of 26 bones. However, abnormal alignment of the ankle joint and foot causes a feeling of instability in the arch, and further causes hardening of the arch and disruption of its function. Failure of arch function results in reduced stress in the foot, resulting in foot disease such as sole tendinitis, stress fractures, and hallux valgus. For example, the hallux valgus is transferred to the valgus of the first MP joint, causing adduction and supination of the first metatarsal bone. Also, in this background, lateral arch descent and lateral displacement of the supraclavicular bone can be seen.

Insoles for hallux valgus have been developed.
For example, Patent Document 1 discloses a shoe provided with a weir portion that reduces a weight load on the toes. In this shoe, the weir portion has the effect of preventing weight transfer to the toes and securing a space for the fourth arch to function.

Further, Patent Document 2 discloses that a protrusion is formed on the upper surface of an intermediate portion in the vertical direction of the insole main body, and an inner protrusion is formed on the inner edge portion of the insole main body behind the protrusion. This structure prevents valgus, etc., prevents progression, and prevents shoe user fatigue.

Japanese Unexamined Patent Publication No. 2019-181050 Japanese Unexamined Patent Publication No. 2019-237

However, in hallux valgus, the bone at the base of the thumb (metatarsal bone) tilts inward (varus) and the fingertips tilt outward (valgus). However, in Patent Document 1, although the weight load is reduced, it is not possible to sufficiently prevent the metatarsal bone from tilting inward.

Further, also in Patent Document 2, it is not possible to sufficiently prevent the metatarsal bone from being tilted inward by the protrusion on the upper surface of the vertical intermediate portion of the insole body.
An object of the present invention is to provide an insole capable of sufficiently preventing the metatarsal bone from tilting inward.

The insole of the present invention is a footwear insole having a shape substantially along the contour of the inside of the footwear and formed of a natural or artificial rubber material, and has a medium repulsion within a range corresponding to the rear part of the ball of the finger. Cushions are provided.

The present inventors have found that twisting of the metatarsal bone can be prevented by providing a metatarsal cushion in a range corresponding to the posterior part of the ball of the insole. This makes it possible to effectively prevent hallux valgus and prevent progression with a very simple configuration.

Further, the insole of the present invention may be provided with a convex cushion in a range corresponding to the medial cuneiform bone and the longitudinal arch direction of the cuboid bone. With this configuration, it is possible to reduce the lateral movement of the foot in the shoe. As a result, the vertical mobility of the foot in the shoe is improved, so that the hallux valgus can be effectively prevented and the progression of the hallux valgus can be prevented.

The insole of the present invention is a footwear insole having a shape substantially along the contour of the inside of the footwear and formed of a natural or artificial rubber material, and has a medium repulsion within a range corresponding to the rear part of the ball of the finger. Cushions are provided. As a result, it is possible to effectively prevent hallux valgus and prevent the progression of hallux valgus with a very simple configuration.

FIG. 1 is an explanatory view showing the structure of the insole.

FIG. 1 is a diagram showing the internal structure of the insole of the present invention. It is a top view. As the insole, the material usually used for the insole is used. Specifically, tennen or a synthetic latex material is used. In particular, it is preferable to use an effervescent latex material because the insole has elasticity.

A first insole cushion 2 is provided on the insole 1 in a range corresponding to the rear part of the ball of the thumb. The first medium-resilience cushion 2 shown in FIG. 1 is a substantially semicircular plate. As long as the first mid-repulsive cushion 2 abuts on the rear part of the thumb ball, it does not have to be substantially semicircular. The metatarsal cushion 2 can be used to prevent twisting of the metatarsal bone. As the material of the medium-resilience cushion, a known material such as sponge material, foamed polyethylene, and foamed polyurethane can be used.

The insole 1 of the present invention has a first convex cushion 3 that contacts a range corresponding to the medial cuneiform vertical arch direction and a second convex cushion 3 that abuts a range corresponding to the longitudinal arch direction of the cuboid bone. 4 may be provided. The first convex cushion 3 and the second convex cushion 4 have a structure having continuous vertices along the longitudinal direction. The medial portion of the first convex cushion 3 and the second convex cushion 4 located inside the continuous apex along the longitudinal direction protects the longitudinal arch from the sole portion. On the other hand, the outer portions of the first convex cushion 3 and the second convex cushion 4, located inside the continuous vertices along the longitudinal direction, protect the vertical arch from the lateral side of the sole. As a result, the lateral movement of the foot can be reduced.

The first convex cushion 3 that contacts the area corresponding to the medial cuneiform longitudinal arch direction and the second convex cushion 4 that abuts the area corresponding to the longitudinal arch direction of the cuboid bone are integrated. Alternatively, those having the same vertical cross section at the apex may be bonded and used.

The insole 1 of the present invention is used by attaching artificial leather or the like to the surface thereof.

The insole of the present invention can be generally used for shoes such as high heels, pumps, sneakers, women's shoes, boots, men's shoes, mountain climbing shoes, safety shoes, and athletic shoes. In particular, it is effective in preventing hallux valgus and preventing progression of hallux valgus in high heels, pumps and the like.

1 Insole 2 1st medium repulsion cushion 3 1st convex cushion 4 2nd convex cushion 5 2nd medium repulsion cushion

Claims (3)

An insole for footwear that has a shape that roughly follows the contour of the inside of the footwear and is made of natural or artificial rubber material, and has a mid-repulsion cushion in the range corresponding to the rear part of the ball of the thumb. insole. The insole according to claim 1, further comprising a convex cushion in a range corresponding to the medial cuneiform and cuboid longitudinal arch directions. The insole according to claim 1 or 2, wherein a mid-resilience cushion is provided in a range corresponding to the center of the calcaneus.

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