Insole for a shoe

Abstract

The present invention relates to an insole installed inside a shoe to contact each foot sole portion of the human forefoot (A), midfoot (C) and rearfoot (B), which is made of a plurality of materials having varying degrees of hardness depending on the insole region, wherein the respective materials are combined to form a single layer. Preferably, the insole for a shoe comprises: a base plate with any one of a forefoot hole, a midfoot hole and a rearfoot hole formed therein corresponding to one of respective foot regions (A), (B) and (C); and an inner plate including one or more of a forefoot support, midfoot support and rearfoot support to be inserted into one of the holes, and, respectively, wherein the base plate and the inner plate are manufactured with materials having varying degrees of hardness relative to one another.

Description

TECHNICAL FIELD[0001]The present invention relates to an insole installed in the bottom inside a shoe to contact the human sole for supporting a sole of the human foot and absorbing the pressure shock, and more particularly, to an insole being made of a plurality of materials having varying degree of hardness depending on the insole region, wherein the respective materials are combined to form a single layer, considering the different pressure distribution depending upon a foot sole portion by a human load.BACKGROUND ART[0002]Conventionally, an insole is installed in the bottom inside a shoe to contact the human sole for supporting, protecting human foot and absorbing the pressure shock, and most of them generally has a shape similar to the sole of a human foot and some specific portion of the insole is protruded in order to support the concave portion of a foot. And the insole is entirely made of single material, foam resin of elasticity and restoration, such as urethane foam and s...

AI Technical Summary

Benefits of technology

The present invention is an insole for a shoe that has a shape complementary to the human foot with different materials of varying hardness to absorb pressure shocks and provide a comfortable bare-foot sensation. Unlike previous designs, the invention avoids different sensations between materials and achieves better fitting power without requiring multiple layers or adhesive agents. The gaps between materials improve air permeability and help to dry sweat and inhibit malodors.

Problems solved by technology

Therefore, an insole made of a single material cannot effectively reflect on or cope with the different pressures applied to the different portions of the sole respectively, and especially cannot absorb much higher pressure-shock concentrated on specific protruded portion of the foot, so that long time walking with a shoe having a single-material insole causes to the foot aches and feels easily fatigue.

The disclosed foaming insole of prior art, however, cannot absorb sufficiently all the pressure shocks on different pressure portions of the foot sole, because the said insole is manufactured by using the materials having simply different hardness of the fore portion and rear portion of the insole without considering the pressure distribution of a foot sole on the biomechanical data.

That is to say, although the received pressures to be contacted the forefoot and the toes in the fore portion of an insole are different one another, the said insole is made of a single material, thereby it being not possible to distribute the pressure shocks uniformly.

Furthermore, the insole having the attached insole piece has disadvantages in that air permeability thereof is not good because the attached piece on the basic insole is attached by adhesive agent, and also the attached piece may be easily removed from the basic insole.

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