Midsole pad for women's shoes that distributes pressure applied onto the sole of the foot, and midsole and shoe having same

Abstract

Disclosed is a midsole for women's shoes which covers the area ranging from the rear end of the foot to the rear end of the forepart of the foot. The curvature (S) formed in the lengthwise direction of the foot along an upper surface of the pad has a portion that bulges out upwardly from the straight line interconnecting both ends of the pad in the lengthwise direction. The highest point (X) of the bulging portion, which is the point at which the bulging portion bulges out the farthest from said straight line, is positioned further forward (toward the forepart of the foot) than the point at which the line starting perpendicularly from the half point (M) of the straight line meets the curvature (S). According to the present invention, the portion of the women's shoe sole, which interconnects the rear end of the shoe sole spaced apart from the ground and a ground contacting part of the shoe sole, has a varying degree of slope, in order to enable the heel of the foot of a wearer to be positioned flat in the horizontal direction, thus distributing the pressure applied to the forepart and big toe part of the wearer's foot by the weight of the wearer to the heel part of the foot of the wearer, and thus effectively reducing the pressure.

1 . A midsole pad for a women's shoe, which is configured to cover the area of the rear part of the foot, which extends from the rear end of the foot to the rear end of the ball of the foot, wherein the midsole pad comprises a contour line S as a curved line extending in the lengthwise direction of the foot along a top surface of the pad, wherein the contour line S has a portion that bulges out upwardly from a straight line connecting both ends of the pad in the lengthwise direction of the pad, and wherein the highest point X of the bulging portion, which is the point that is the farthest away from the straight line, is positioned further forward (toward the ball of the foot) than a point at which a line extending perpendicularly from the half point M of the straight line meets the contour line S. 
     
     
         2 . The midsole pad according to  claim 1 , wherein the length of a line segment that connects a point on the straight line and a point on the contour line S so as to extend perpendicularly to the straight line is a separation distance between the straight line and the contour line, and a ratio of the separation distance to the length of the straight line is a separation distance ratio, and wherein when the contour line S is divided into an inner contour line S 1  as a contour line defined with respect to the inner upper surface of the foot and an outer contour line S 2  as a contour line defined with respect to the outer supper surface of the foot, the maximum separation distance ratio as the maximum value of the separation distance ratio ranges from 8% to 20% in the inner contour line and ranges from 4% to 17% in the outer contour line. 
     
     
         3 . The midsole pad according to  claim 1 , wherein the pad is made of a rigid synthetic resin material, and comprises a shank portion and a peripheral portion formed integrally with the shank portion, the shank portion having a shape which is thicker than the peripheral portion so that it is further protruded as compared to the peripheral portion. 
     
     
         4 . The midsole pad according to  claim 3 , wherein the pad is formed by an injection molding process of synthetic resin. 
     
     
         5 . The midsole pad according to  claim 1  or  2 , wherein a change in the separation distance ratio of the inner contour line is larger than that of the outer contour line, and
 the maximum separation distance ratio of the inner contour line S 1  is larger by 3% point-5% point than that of the inner contour line S 2 . 
 
     
     
         6 . A midsole for a women's shoe, which comprises the midsole pad according to any one of  claims 1  to  5 , and a taction attached to the underside surface of the midsole pad in such a fashion as to be at least partially overlapped with the midsole pad, the midsole being configured to cover an area corresponding to the entire surface of the foot sole. 
     
     
         7 . A midsole for a women's shoe, which comprises the midsole pad according to  claim 3  or  4 , and a taction attached to the underside surface of the midsole pad in such a fashion as to be at least partially overlapped with the midsole pad, the midsole being configured to cover an area corresponding to the entire surface of the foot sole,
 wherein the midsole pad comprises a shank portion formed protrudingly downwardly from the underside surface of the pad, and 
 wherein the taction comprises an elongated opening formed therein to correspond to the shank portion so that when the taction and the midsole pad are joined to each other, the shank portion is fit into elongated opening. 
 
     
     
         8 . A shoe for women comprising the midsole according to  claim 6  and an outsole including a heel as shoe sole members. 
     
     
         9 . A shoe for women comprising the midsole according to  claim 6  and an outsole including a heel as shoe sole members, wherein the upper of the shoe and the midsole for a women's shoe are fixed to each other by using a fixture piecing through the upper and the taction together at a portion where the upper and the taction are overlapped with each other at an area where the midsole is composed of only the taction, and wherein the upper and the midsole for a women's shoe are fixed to each other by using only an adhesive at a portion where the midsole pad is overlapped with the upper together with the taction. 
     
     
         10 . A shoe for women comprising the midsole according to  claim 6  and an outsole including a heel as shoe sole members, wherein the midsole pad comprises a contour line S defined by the top surface thereof when viewed from the inside of the foot, the contour line S comprising:
 a heel seating section configured to form a gentle inclination angle of below 15° with the ground surface, i.e., the horizontal surface in its entirety; 
 an inclined section positioned in front of the heel seating section and configured to form a steep inclination angle of more than 45° with the ground surface due to an inclination angle difference of more than 30° between the inclined section and the heel seating section; and 
 a transition section configured to form a curved surface interconnecting the heel seating section and the inclined section.