Slider for concealed slide fastener

摘要

Providing a slider for a concealed slide fastener, capable of achieving a smooth sliding operation of the slider, even when the slider is applied to a seat cover for a seat and strong lateral pulling force is applied to the slider when the slide fastener is closed. A slider for a concealed slide fastener comprises a slider body having at least a lower blade, left and right side wall portions and left and right first flanges, and slider upper plate member engaged with the slider body and having at least a second flange projecting toward at least the left and right side wall portions.

主权项

1. A slider for a concealed slide fastener which engages and disengages fastener elements of a pair of fastener stringers in which opposite side edges of fastener tapes are bent and fixed into U-shapes and the fastener elements are attached along bent end edges of the side edges, the slider comprising:
a lower blade; left and right side wall portions erected along side edges of the lower blade in a right and left direction; left and right first flanges extending from upper ends of the left and right side wall portions in a mutually approaching direction; a guide post disposed between the left and right first flanges and extending from a central portion of the lower blade in the right and left direction at a side of shoulder mouths of the slider toward a rear mouth of the slider; and a second flange protruding from an upper portion of the guide post toward at least the left and right first flanges and the rear mouth, wherein the slider is comprised of a slider body having at least the lower blade, the left and right side wall portions and the left and right first flanges, and a slider upper plate member engaged with the slider body and having at least the second flange, wherein the guide post is provided in one of the slider body and the slider upper plate member, wherein leading ends of the left and right first flanges at the side of the shoulder mouths of the slider extend forwardly beyond a front end edge of the guide post, wherein the second flange and the left and right first flanges are formed so as to uniformly increase in widths thereof from a side of the rear mouth of the slider to the front end edge of the guide post, and wherein outer surfaces of the second flange are substantially parallel to inner surfaces of the left and right first flanges such that gaps each having a substantially constant interval are formed between the outer surfaces of the second flange and the inner surfaces of the left and right first flanges.