Single-layered arch support insole to be inserted into shoe

Abstract

Provided is an arch support insole to be inserted into a shoe. The insole should satisfy tasks for a wearer as follows: (1) improvement of wearing feeling by maximally reducing the thickness of the insole, (2) reduction of fatigue on walking by maximally preventing transmission of shocks, and (3) sufficient support of the arch of the wearer by maintaining an original shape of the arch support part. In addition, these tasks should be solved by a minimum number of manufacturing processes and minimum cost. The arch support insole includes an insole main body having a portion or the entire of an arch support part curvedly projecting upward to support the arch of a wearer's foot, and a heel support part coupled to a rear part of the insole main body, wherein the insole main body and the heel support part are formed of a single layer by dual injection, the insole main body is formed of a material having hardness higher than that of the heel support part, and a plurality of honeycomb-shaped projections are formed downward at a bottom surface of the curved arch support part.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of Korean Patent Applications No. 10-2007-0125416 and No. 10-2008-0021299 filed with the Korea Intellectual Property Office on Dec. 5, 2007 and Mar. 7, 2008, respectively, the disclosure of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a single-layered arch support insole to be inserted into a shoe.[0004]2. Description of the Related Art[0005][Related Prior Art Documents][0006]1. Korean Utility Model Registration No. 20-0428449 B[0007]2. Korean Utility Model Registration No. 20-0390153 B[0008]3. Korean Utility Model Registration No. 20-0395056 B[0009]4. Korean Patent Laid-open Publication No. 2003-0093618 A[0010]5. Korean Utility Model Registration No. 20-0431315 B[0011]6. U.S. Pat. No. 6,976,322 B[0012]In general, an insole corresponds to the shape of the sole of a foot to form a curved shape such that the inso...

AI Technical Summary

Benefits of technology

[0019]The multi-layered structure of insole formed of thermoplastic rubber has a large thickness of the entire insole to degrade wearing feeling. In addition, addition of unnecessary processes upon manufacturing increases the number of manufacturing processes and manufacturing cost. Further, the insole formed of a single material having no resilience to support the pressure periodically receives shock applied from the ground to the heel to give fatigue on walking for a long time. Furthermore, long-term use of the insole causes deformation of the arch support part to make it impossible to sufficiently support the arch of the wearer's foot.

[0020]That is, the insole should satisfy tasks for a wearer as follows: (1) improvement of wearing feeling by maximally reducing the thickness of the insole, (2) reduction of fatigue on walking by maximally preventing transmission of shocks, and (3) sufficient support of the arch of the wearer by maintaining an original shape of the arch support part. In addition, these tasks should be solved by a minimum number of manufacturing processes and minimum cost.

[0024]Therefore, it is possible to minimally maintain the thickness of a “single-layered” insole to improve wearing feeling and more effectively and securely maintain the arch support part. In addition, it is possible to maintain the arch support part or the anti-slip part softer than the arch support part, wherein the heel support part or the anti-slip part should require comfort, other than stiffness. Further, since the insole is manufactured by a dual injection process, it is possible to solve problems that the number of manufacturing processes and manufacturing cost are increased due to addition of unnecessary processes. Furthermore, it is also possible to increase durability of the insole, in comparison with a process of using adhesive, and so on.

[0031]Therefore, as described above, it is possible to minimally maintain the thickness of a “single-layered” insole to improve wearing feeling and more effectively and securely maintain the arch support part. In addition, it is possible to maintain the arch support part or the anti-slip part softer than the arch support part, wherein the heel support part or the anti-slip part should require comfort, other than stiffness. Further, since the insole is manufactured by a dual injection process, it is possible to solve problems that the number of manufacturing processes and manufacturing cost are increased due to addition of unnecessary processes. Furthermore, it is also possible to increase durability of the insole, in comparison with a process of using adhesive, and so on. In particularly, the projections formed at a position corresponding to the bottom surface of the arch support part curvedly projecting upward to support the arch of the wearer's foot employs a honeycomb structure, i.e., a hexagonal structure, to effectively prevent the arch support part from being buckled, by ideally and evenly distributing the weight of the wearer, even though repeated fatigue loads are generated due to the long-term use.

[0034]That is, as described above, the projections formed at a position corresponding to the bottom surface of the arch support part curvedly projecting upward to support the arch of the wearer's foot employs a honeycomb structure, i.e., a hexagonal structure, to effectively prevent the arch support part from being buckled or deformed, by ideally and evenly distributing the weight of the wearer, even though repeated fatigue loads are generated due to the long-term use. In addition, according to use purposes, the insole may be formed by dual injection such that a minimal part corresponding to the arch support part is formed of a material having high hardness, and the other part is formed of a relatively soft material. As a result, it is possible to feel comfort and minimize fatigue on walking, in addition to the arch support and buckling prevention purposes.

[0035]Further, the plurality of honeycomb-shaped projections may have the size that is gradually reduced from the front part to the rear part of the insole main body to effectively prevent deformation and buckling of the rear part of the arch support part due to general load concentration to the rear part of the insole by the weight of the wearer.

Problems solved by technology

In addition, addition of unnecessary processes upon manufacturing increases the number of manufacturing processes and manufacturing cost.

Further, the insole formed of a single material having no resilience to support the pressure periodically receives shock applied from the ground to the heel to give fatigue on walking for a long time.

Furthermore, long-term use of the insole causes deformation of the arch support part to make it impossible to sufficiently support the arch of the wearer's foot.

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