The slide fastener has a separable bottom end stop, and the separable bottom end stop has at least an insert pin and a box pin. The insert pin has an escape portion provided with an inclined surface or a curved surface along which the thickness dimension of the insert pin decreases in the direction of the tape width toward the side edge that faces the box pin, the escape portion being positioned in the front-end corner portion of a first-surface of the insert pin, the corner portion being positioned along the edge that faces the box pin. This allows the escape portion of the insert pin to function as an interference prevention means, efficiently prevent chain failure in an element row when the slide fastener is bent into a U-shape, and maintain stable engaging.

A two-way insertion assembly includes an insertion rod and an insertion pin for mounting two-way sliders, an insertion pin side wing base is provided on a cloth tape of the insertion pin; and an insertion pin side wing channel for the two-way sliders to enter is formed between the insertion pin and the insertion pin side wing base, and the insertion pin side wing channel is provided with a limiting portion capable of transversely limiting the sliders moving in place. The problem of the cloth tape coming into an inner cavity of a slider due to a transverse shake of the slider can be solved, and rapid and precise alignment of inner cavities of the two-way sliders can be easily achieved, thereby facilitating quick and accurate insertion and pull-out of the insertion rod.

The present invention provides a double-separating and double-pulling zipper comprising a left tape extension, a right tape extension, a first slider, a second slider, two zipper teeth row. The two zipper teeth row are respectively arranged on the inner edges of the left tape extension and the right tape extension. The first slider and the second slider are slidably arranged on the two zipper teeth row, and the first slider and the second slider are pulled so that the left tape extension and the right tape extension are opened or closed. Therefore, the zipper of the present invention can be opened and closed in a two-way manner, making it applicable to partition structures to achieve the effect of space separation. Further, the zipper made of plastic materials can be applied to patient gowns, allowing patients to undergo MRI examinations directly while maintaining their self-esteem during various examinations.

The two-way separator includes a pair of fastener stringers and a pair of sliders. The fastener stringers include fastener tapes, element columns, and a separable pin and a retainer pin. The sliders are disposed on the fastener stringers. Each of the sliders has a slider body and a lock pin. The separable pin has a separable pin body, a separable pin protrusion, and a groove. The retainer pin has a retainer pin body and a retainer pin protrusion. The separable pin protrusion has a half tooth portion and a tilt portion. The tilt portion has a tilt surface that tilts from an upper surface of the separable pin body toward a projecting side edge of the half tooth portion and tilts from an upper side toward a lower side, and a dimension of the tilt portion in an up-down direction is greater than a protrusion amount of the lock pin.