Shock-Absorbing Device for Shoes

Abstract

The present invention provides a shock-absorbing device for shoes comprises a cross-linked foam having a body and at least one inner cavity formed in the body; and a housing containing the cross-linked foam. The shock-absorbing device of the present invention can easily be applied to soles of shoes having diverse sizes and shapes to effectively reduce an impact applied to a foot. Besides, the present invention can cut down a manufacturing cost greatly by simplifying a manufacturing process of the shock-absorbing device.

1 . A shock-absorbing device for shoes, comprising: 
 a cross-linked foam having a body and at least one inner cavity formed in the body; and    a housing containing the cross-linked foam.    
     
     
         2 . The device according to  claim 1 , wherein the cross-linked foam has a plurality of inner cavities that is not connected to each other.  
     
     
         3 . The device according to  claim 1 , wherein the cross-linked foam has a plurality of inner cavities that is connected to each other.  
     
     
         4 . The device according to  claim 1 , wherein the cross-linked foam has a plurality of groups of the inner cavities and the inner cavity is connected to a neighboring inner cavity in a same group.  
     
     
         5 . The device according to  claim 1 , wherein the cross-linked foam has a plurality of groups of the inner cavities that are classified into a first group in which the inner cavities are connected to each other and a second group in which the inner cavities are not connected to each other.  
     
     
         6 . The device according to  claim 1 , wherein the body has a partially different color.  
     
     
         7 . The device according to one of  claims 1  to  6 , wherein at least one inner cavity is exposed to outside.  
     
     
         8 . The device according to one of  claims 1  to  6 , wherein at least one inner cavity is filled with at least one of gas, liquid and material that is same as or different from the body.  
     
     
         9 . The device according to one of  claims 1  to  6 , wherein molded material that is formed of at least one of materials that are same as or different from the body is inserted into at least one inner cavity.  
     
     
         10 . The device according to one of  claims 1  to  6 , wherein the housing is filled with at least one of gas, liquid and material that is same as or different from the body.  
     
     
         11 . The device according to one of  claims 1  to  6 , wherein molded material that is formed of at least one of materials that are same as or different from the body is inserted into the housing.  
     
     
         12 . The device according to one of  claims 1  to  6 , wherein at least one inner cavity is connected to at least one outer surface of the body.  
     
     
         13 . The device according to  claim 1 , wherein at least one hollow portion is formed on the housing.  
     
     
         14 . The device according to  claim 13 , wherein the hollow portion is formed by attaching one side of the housing to an opposing side of the housing.  
     
     
         15 . The device according to  claim 14 , wherein an attachment of the hollow portion of the housing is done by one of a high frequency attachment, a supersonic attachment and a heat-compression attachment.  
     
     
         16 . The device according to  claim 1 , wherein an attaching means is formed on a whole surface or a portion of a surface of the cross-linked foam for attaching the cross-linked foam to an inner surface of the housing.  
     
     
         17 . The device according to  claim 1 , wherein a sealing of the housing is done by one of a high frequency attachment, a supersonic attachment, a heat-compression attachment and a blow injection molding method.  
     
     
         18 . The device according to  claim 1 , wherein the housing is formed of thermoplastic polyolefin based resin or thermoplastic polyurethane resin.