Slide fastener

摘要

A slide fastener for preventing core strings from being caught in a gap between upper and lower flanges, securing the flexibility of the slide fastener when engaged, and improving the designability of the slide fastener. The gap dimension between the upper and lower flanges of a slider in the up-down direction is smaller than the core string dimension in the front-rear direction when the core strings are pressed with the pressure of 5 kgf. Fastener elements are independently disposed in the up-down direction of a tape member when engaged. The fastener element has a design portion disposed at a front side of the tape member, and an engaging portion disposed at a rear side of the tape member so as to engage with adjacent fastener element, and the design portion is disposed distant from the adjacent design portion when engaged and having a hemispherical shape with a curved shape.

主权项

1. A slide fastener comprising:
a pair of tape members disposed in parallel in a left-right direction, a pair of fastener element rows attached to the tape members, and a slider into which the pair of fastener element rows are inserted, the slider engages and disengages the pair of fastener element rows, wherein each of the fastener element rows is composed of a plurality of fastener elements, wherein each of the fastener elements includes a design portion disposed at a front side of its respective tape member, and an engaging portion disposed at a rear side of its respective tape member so as to engage with an adjacent fastener element attached to a counterpart tape member, wherein the design portion is disposed distant from an adjacent design portion when engaged, wherein a tape-receiving groove for receiving the tape-side edge of the counterpart tape member when engaged is provided at a leading end portion of each of the fastener elements and between the design portion and the engaging portion, wherein the engaging portion includes a base portion attached to the tape member, an engaging head portion extending from the base portion towards the counterpart tape member and having the tape-receiving groove therein, and a neck portion provided between the base portion and the engaging head portion, wherein the engaging head portion has engaging parts protruding in an up-down direction, wherein the engaging parts of the engaging head portion include first engaging parts protruding from an upper end and a lower end of the design portion in the up-don direction, respectively, and second engaging parts continued from the first engaging parts respectively, and wherein a length of each of the first engaging parts in the up-down direction is set to be shorter than a length of a gap between the design portions adjacent to each other in the up-down direction when the pair of fastener element rows are engaged with each other in a linear fashion.