Slide Fastener

Abstract

There is provided a slide fastener including a pair of fastener tapes each having a waterproof layer, a pair of fastener element rows each having a plurality of fastener elements, an upper opening slider, a box pin, and an insert pin. At least one recess which is elongated in a longitudinal direction of the pair of fastener tapes is formed on each of both the front and back surfaces of the box pin and both the front and back surfaces of the insert pin.

1 . A slide fastener comprising:
 a pair of fastener tapes each having a waterproof layer;   a pair of fastener element rows each having a plurality of fastener elements which are respectively arranged along opposing side edges of the pair of fastener tapes;   an upper opening slider configured to disengage engagement of the pair of fastener element rows from above;   a box pin attached to both front and back surfaces of one end of one of the fastener tapes, the one end where the fastener elements are not present; and   an insert pin attached to both front and rear surfaces of one end of the other one of the fastener tapes, the one end where the fastener elements are not present,   wherein at least one recess which is elongated in a longitudinal direction of the pair of fastener tapes is formed on each of both front and back surfaces of the box pin and both front and back surfaces of the insert pin.   
     
     
         2 . The slide fastener according to  claim 1 ,
 wherein the at least one recess comprises a plurality of recesses, and   wherein at least one through-hole is formed on each of the fastener tapes at a position between the plurality of recesses.   
     
     
         3 . The slide fastener according to  claim 1 , further comprising:
 the upper opening slider configured to disengage the engagement of the pair of fastener element rows from above; and a lower opening slider configured to disengage the engagement of the pair of fastener element rows from below,   wherein the recess which is formed on the box pin is configured such that a width dimension thereof increases with distance from the fastener elements in the longitudinal direction of the fastener tapes.   
     
     
         4 . The slide fastener according to  claim 1 ,
 wherein the at least one recess which is formed on the insert pin comprises a plurality of recesses, and   wherein the front surface of the insert pin is formed with a step at a position between the plurality of recesses.