Insole with shock-absorbing function and manufacturing method thereof

Abstract

The present invention relates to a shock-absorbing insole for a footwear and a method of manufacturing the same wherein the shock-absorbing insole is disposed on the bottom surface in a footwear for absorbing and reducing the shocks applied from the ground to a wearer's sole during running, jogging, walking, etc. The shock-absorbing insole includes: a bottom plate made of a synthetic resin and having fabric attached on the top surface thereof; and a shock-absorbing member made of an elastic synthetic resin for absorbing shocks applied to the footwear in such a manner as to be contracted and restored from/to its original state in accordance with the load applied during walking, the shock-absorbing member being formed integrally with a bottom surface of a heel portion of the bottom plate.

1 . A shock-absorbing insole for a footwear comprising:
 a bottom plate ( 110 ) made of a synthetic resin and having fabric attached on the top surface thereof; and   a shock-absorbing member ( 10 ) made of an elastic synthetic resin for absorbing shocks applied to the footwear in such a manner as to be contracted and restored from/to its original state in accordance with the load applied during walking, the shock-absorbing member ( 10 ) being formed integrally with a bottom surface ( 114 ) of a heel portion ( 112 ) of the bottom plate ( 110 ).   
   
   
       2 . The shock-absorbing insole according to  claim 1 , wherein the shock-absorbing member ( 10 ) has a plurality of first protrusions ( 12 ) formed integrally with the bottom plate ( 110 ) upon the molding of the bottom plate ( 110 ) in such a manner as to be protruded downwardly from the bottom surface ( 114 ) of the bottom plate ( 110 ), each of the plurality of first protrusions ( 12 ) having a plurality of folds ( 13 ) formed along the outer periphery thereof in such a manner as to be contracted and restored in the upward and downward direction thereof. 
   
   
       3 . The shock-absorbing insole according to  claim 2 , wherein the shock-absorbing member ( 10 ) has a second protrusion ( 14 ) formed integrally with the bottom plate ( 110 ) upon the molding of the bottom plate ( 110 ) in such a manner as to be protruded inclinedly toward the front side of the bottom plate ( 110 ) in front of the first protrusions ( 12 ), the second protrusion ( 14 ) having a plurality of folds ( 15 ) formed along the outer periphery thereof in such a manner as to be contracted and restored in the upward and downward direction thereof. 
   
   
       4 . The shock-absorbing insole according to  claim 1 , further comprising a plurality of springs ( 19 ) disposed at the inside of the shock-absorbing member ( 10 ) in such a manner as to be contracted and restored in the upward and downward direction thereof, each of the springs ( 19 ) being disposed at the inside of the shock-absorbing member ( 10 ) before the molding of the shock-absorbing member ( 10 ) in such a manner as to be formed integrally with the shock-absorbing member ( 10 ) upon the molding of the shock-absorbing member ( 10 ). 
   
   
       5 . The shock-absorbing insole according to  claim 1 , wherein the shock-absorbing member ( 10 ) further comprises: a frame ( 11 ) having a plurality of receiving grooves ( 18 ) formed downwardly from the top surface thereof, and a plurality of protrusions ( 12  and  14 ) protruded downwardly from the bottom surface thereof at the positions corresponding to each of the plurality of receiving grooves ( 18 ), the frame ( 11 ) being attached integrally to the bottom surface ( 114 ) of the bottom plate ( 110 ) by means of heat fusion; and a plurality of springs ( 19 ) insertedly coupled to the plurality of receiving grooves ( 18 ). 
   
   
       6 . The shock-absorbing insole according to  claim 5 , wherein the frame ( 11 ) has a main recess ( 16 ) formed to a lower depth than that of each of the plurality of receiving grooves ( 18 ), for forming the plurality of receiving grooves ( 18 ) at the inside thereof, and the shock-absorbing member ( 10 ) further has a supporter ( 20 ) adapted to be insertedly coupled with the main recess ( 16 ) and having a plurality of insertion holes ( 22 ) formed at the inside thereof for inserting the springs ( 19 ) thereto and a holding plate ( 30 ) adapted to be coupled to the top surface of the frame ( 11 ) for compressing the springs ( 19 ). 
   
   
       7 . The shock-absorbing insole according to  claim 1 , wherein the shock-absorbing member ( 10 ) further has a base plate ( 40 ) attached integrally on the bottom surface ( 114 ) of the heel portion ( 112 ) of the bottom plate ( 10 ) by means of heat fusion, a plurality of protrusions ( 12  and  14 ) molded integrally to the base plate ( 40 ) in such a manner as to be protruded downwardly from the base plate ( 40 ), and a plurality of springs ( 19 ) molded integrally to the plurality of protrusions ( 12  and  14 ) in such a manner as to be inserted at the inside of the plurality of protrusions ( 12  and  14 ). 
   
   
       8 . A shock-absorbing insole for a footwear comprising:
 a bottom plate ( 110 ) made of a synthetic resin and having fabric attached on the top surface thereof; and   a shock-absorbing member ( 10 ) formed integrally with a bottom surface ( 114 ) of a heel portion ( 112 ) of the bottom plate ( 110 ), the shock-absorbing member ( 110 ) being made of an elastic synthetic resin for absorbing shocks applied to the footwear in such a manner as to be contracted and restored from/to its original state, the shock-absorbing member ( 10 ) comprising:
 a heel cup ( 11 ′) made of a synthetic resin in such a manner as to be formed integrally with the bottom surface ( 114 ) of the heel portion ( 112 ) of the bottom plate ( 110 ) by means of heat fusion and having a main recess ( 16 ) formed downwardly from the top surface thereof at the inside thereof, a plurality of receiving grooves ( 18 ) formed downwardly from the main recess ( 16 ), and a plurality of protrusions ( 12 ′) protruded downwardly from the bottom surface at the positions corresponding to the plurality of receiving grooves ( 18 ); 
 a plurality of springs ( 19 ) disposed at the inside of the plurality of receiving grooves ( 18 ) of the heel cup ( 11 ′) in such a manner as to make the heel cup (H′) attached supportedly to the bottom surface ( 114 ) of the bottom plate ( 110 ) to apply an elastic force to the bottom plate ( 110 ); and 
 a supporter ( 20 ) adapted to be insertedly coupled with the main recess ( 16 ) and made of an elastic synthetic resin for supporting the surroundings of the springs ( 19 ), the supporter ( 20 ) having a plurality of insertion holes ( 22 ) formed at the inside thereof for inserting the springs ( 19 ) thereto. 
   
   
   
       9 . A method of manufacturing a shock-absorbing insole having a bottom plate made of a synthetic resin and having fabric attached on the top surface thereof, the method comprising the steps of:
 molding a shock-absorbing member with a synthetic resin, the shock-absorbing member having a plurality of protrusions formed protruded downwardly from the bottom surface (S 520 ); and   coupling the shock-absorbing member with a bottom plate by means of heat fusion (S 530 ).   
   
   
       10 . The method of manufacturing a shock-absorbing insole according to  claim 9 , further comprising the step of insertedly coupling a plurality of springs correspondingly to the inside of the plurality of protrusions. 
   
   
       11 . The shock-absorbing insole according to  claim 2 , further comprising a plurality of springs ( 19 ) disposed at the inside of the shock-absorbing member ( 10 ) in such a manner as to be contracted and restored in the upward and downward direction thereof, each of the springs ( 19 ) being disposed at the inside of the shock-absorbing member ( 10 ) before the molding of the shock-absorbing member ( 10 ) in such a manner as to be formed integrally with the shock-absorbing member ( 10 ) upon the molding of the shock-absorbing member ( 10 ). 
   
   
       12 . The shock-absorbing insole according to  claim 3 , further comprising a plurality of springs ( 19 ) disposed at the inside of the shock-absorbing member ( 10 ) in such a manner as to be contracted and restored in the upward and downward direction thereof, each of the springs ( 19 ) being disposed at the inside of the shock-absorbing member ( 10 ) before the molding of the shock-absorbing member ( 10 ) in such a manner as to be formed integrally with the shock-absorbing member ( 10 ) upon the molding of the shock-absorbing member ( 10 ).