JPH0142681B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a shoe sole suitable for use as an inner sole that is integrally provided on the surface layer of a shoe sole, or as an insole that is removably installed. This invention relates to improving the midsole structure.

(Prior Art) For the purpose of reducing foot fatigue when walking, insoles of shoes have been widely known that have a raised part made of an elastic material such as rubber on the part of the sole corresponding to the arch of the foot. There is.

This raised area is formed to constantly and gently support the entire arch, which is a characteristic feature of the human foot, on a large surface when wearing shoes, reducing foot fatigue and maintaining foot health. It is.

(Problem to be solved by the invention) However, if the ridges are placed closely together along the arch of the sole of the foot, the part corresponding to the calcaneus of the foot, where a large nerve runs, will also be compressed. Direct pressure may sometimes cause pain and make walking unnatural.

Furthermore, when chronic weight-bearing is applied to the foot for a long period of time, the arch of the foot becomes unable to support the weight and gradually becomes lower. Because it is made of elastic material, even if it is possible to apply arch action force to the arch, it is unable to prevent and support the arch from lowering, making it easy to get tired from walking for long periods of time. There was a problem in that leg pain occurred as the condition progressed.

In addition, as mentioned above, conventional raised parts do not take into account the structure of the skeletal bones of the foot.
Because it is simply formed in a shape that is closely connected to the arch, its apex is located at the front of the calcaneus behind the navicular bone, and it only serves to eliminate the fat pad on the sole of the heel that has a cushioning effect. Moreover, it also causes distortion to the foot skeletal structure, causing loosening and deformation of the ankle joints due to long-term wear.

The object of the present invention is to provide an insole structure for shoes that fundamentally solves these problems.

(Means for Solving the Problems) In order to achieve the above object, the insole of the shoe of the present invention has an elastic ridge on the part corresponding to the arch of the sole, as shown in the drawings corresponding to the embodiments. In the insole provided with the portion 2, the elastic raised portion 2 is connected to a cushion portion 3 made of a soft sponge material.
The support part 4 is made of a hard ultra-viscous material embedded in the thick part of the cushion part 3.
The apex of the support portion 4 and the support portion 4 are provided so as to correspond to the scaphoid tuberosity of the foot.

(Function) Since the apex of the elastic protuberance 2 corresponds to the navicular tuberosity of the foot, there is no pressure on the anatomically large nerves and blood vessels, making it possible to walk comfortably and painlessly. The compressive force on the calcaneus behind the calcaneus is reduced, and the elastic bulge 2 brings its cushion portion 3 into elastic contact with the arch of the foot, exerting a cushioning action on the foot, causing a pine surge action on the sole of the foot and a reduction in venous blood flow. Increases circulation and promotes strengthening and strengthening of the plantaris muscles.

In addition, the arch structure of the foot is supported by a support portion 4 made of a hard ultra-viscous material embedded in the cushion portion 3 in correspondence with the navicular bone of the foot, thereby preventing loosening and deformation of the ankle joint. , all of which have the effect of preventing fatigue of the plantaris muscles.

In addition, the cushion portion 3 absorbs the large impact force that the arch of the foot receives when walking, and the support portion 4 absorbs the impact energy, thereby reducing the impact on the foot.

(Example) To explain an example of the present invention with reference to the drawings, 1
The insole is mainly made of rubber, elastic synthetic resin material, etc., and an elastic protrusion 2 is integrally provided on one side of the insole along the shape of the arch portion b of the foot a.

The elastic raised portion 2 is composed of a cushion portion 3 made of a soft sponge body that is in direct contact with the arch portion b, and a support portion 4 embedded at a predetermined location within the cushion portion 3.

The cushion part 3 has its apex 5 corresponding to just below the scaphoid tuberosity c of the foot a, and the front and medial parts of its upper surface extend gently downward from the apex 5 along the sole of the arch part b. The rear part is formed into a steeply inclined surface 7 which is spaced from the sole of the foot of the arch part b and directed downward, and a space 8 is provided between this steeply inclined surface 7 and the sole of the foot. This allows the arch structure to move smoothly, eliminates excessive pressure on the calcaneus d, and stabilizes the calcaneus itself in place.

On the other hand, the support portion 4 is made of a super-viscous material such as hard rubber or elastic hard synthetic resin that is harder than the sponge body forming the cushion portion 3, such as Hanenite (trade name, manufactured by Naigai Rubber Co., Ltd.),
The apex 9 is located directly below the apex 5 of the cushion portion 3 at a suitable distance 10 from the apex 5, and the upper surface of the anterior part from the apex 9 is located below the anterior end of the navicular bone c. The cushion part 3 is provided so as to form a downwardly sloping surface up to the upper part thereof, and the rear part and the side part are provided along the surface of the cushion part 3 with the distance 10 substantially maintained from the apex 9.

Note that the thickness of the spacing section 10 of the cushion section 3 is smaller than the thickness of the maximum thickness section of the support section 4.

In the embodiment of the present invention, in addition to the elastic protrusion 2 on the arch portion b, a second cushion portion 11 made of the same material as the cushion portion 4 is also protruded on the upper surface of the front end of the main body 1 of the insole. It has been set up.

This second cushion portion 11 is provided from the second finger e to the fourth finger g in the width direction, and its apex 12 is located at a portion that comes into elastic contact with the base of the second finger e, and extends from the apex 12 to the fourth finger g. While it is formed into a gentle slope 13 in close contact between the bases of the four fingers g,
A steep slope 14 is formed from the apex 12 on the side from the second finger e to the first finger h. Further, the rear part from the apex 12 is inclined 15 toward the rear bone part of the third finger f.

With this structure, the second cushion part 11 forms and maintains a natural forefoot arch, and when the foot kicks off, it produces a spring effect, allowing for nimble walking, and also allows the foot to move smoothly. This prevents the finger from sliding forward excessively inside the shoe and allows it to be placed at a predetermined location within the shoe, thereby preventing the finger from coming into contact with the tip inside the shoe and causing injury.

Further, in the foot corresponding to the region between the second cushion portion 11 and the elastic raised portion 2, there are the flexor hallucis brevis muscle and the adductor hallucis muscle; Since a large recess 15 is formed between the protuberances 2, pressure on the flexor hallucis brevis and adductor hallucis muscles is eliminated, allowing easy kicking and rhythmic walking.

The insole configured in this manner may be provided integrally with the inner sole of the shoe, or may be inserted as a replaceable insole, but in any case, the cushion portion of the inner sole may In order to prevent the support part 3 and the support part 4 from expanding outward under load and reducing their effectiveness, a moon-shaped core is provided inside the side wall surrounding the heel (usually a moon-shaped core is inserted to protect the heel more firmly than before). (The conventional one is short in order to protect the heel) and is attached to shoes with a strong inner moon-shaped core that is wide and long enough to provide pressure support from the sides. As a result, the effect can be further expressed.

(Effects of the Invention) As described above, according to the insole of the present invention, the elastic protrusion 2 corresponding to the arch of the foot is embedded within the cushion portion 3 made of soft sponge and the thick portion of the cushion portion 3. The cushion part 3 and the support part 4 are made of a hard, ultra-viscous material, and the apexes of the cushion part 3 and the support part 4 are provided so as to correspond to the lower part of the navicular tuberosity of the foot, so that the elastic protuberance 2
Since the apex of the foot corresponds to the lower part of the navicular bone of the foot, it is possible to walk comfortably without any pain, and the pressure on the calcaneus bone behind the navicular bone is reduced, preventing nerve damage. In addition, the elastic bulge 2 brings its cushion portion 3 into elastic contact with the arch of the foot, exerting a cushioning effect on the foot, promoting strengthening and strengthening of the plantaris muscles, and strengthening the sole of the foot. While the pine surge action and venous blood circulation action can be enhanced, the arch structure of the foot is improved by the support part 4 made of a hard, ultra-viscous material embedded in the cushion part 3 corresponding to the navicular bone of the foot. The decline can be prevented. Deterioration of the arch leads to a decrease in spring efficiency, leading to early foot fatigue, so preventing the deterioration of the arch structure of the foot helps prevent fatigue, as well as loosening of the ankle joint and foot deformity.

Furthermore, the cushion portion 3 absorbs the large impact force that the arch of the foot receives when walking, etc., and the support portion 4 absorbs the impact energy, thereby reducing the impact on the foot.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional side view of a state in which it is placed along the sole of the foot, FIG. 2 is a plan view, and FIG. 4
The figure is a longitudinal sectional front view of a portion along the finger portion. 1... Insole main body, 2... Elastic ridge, 3... Cushion part, 4... Support part, 5... Steeply inclined surface.

Claims (1)

[Scope of Claims] 1. An insole in which an elastic ridge is provided in a portion corresponding to the arch of the sole of the foot, the elastic ridge is embedded within a cushion portion made of a soft sponge and a thick portion of the cushion portion. What is claimed is: 1. An insole for a shoe, characterized in that the insole is formed of a support part made of a hard ultra-viscous material, and the apex of the cushion part and the support part is provided so as to correspond to the scaphoid tuberosity of the foot. 2. The shoe according to claim 1, characterized in that the rear surface of the cushion portion is steeply sloped downward to form a space between the steeply sloped surface and the arch of the sole of the foot. bottom.