A slide fastener of the present invention includes: a first fastener stringer; a second fastener stringer; and a slider which couples or separates the first and second fastener stringers, in which the second fastener stringer separated from the slider is inserted into the slider wherein the first fastener stringer and the second fastener stringer are coupled in a vertical direction. Accordingly, a row of fastener elements of the second fastener stringer separated from the slider is inserted into the slider by first and second fastening members when a fixing pin and an insertion pin are coupled in a vertical direction, and as a result, the coupling operation is convenient.

A lower stop assembly for slide fasteners comprises a left stop member and a right stop member. The inside of the right stop member is provided with a right slot and an annular orifice both extending in the direction of the inside, the annular orifice being located at the front end of the right slot and in direct communication with an opening of the right slot. The left stop member can be movably inserted into the opening of the right slot and then released from lateral notches of the right slot. As the left stop member can be released from the lateral notches of the right slot, when the left stop member needs to retreat from the right slot, the left stop member may rotate around the outer lateral wall of the annular orifice under the drive of the left slide fastener belt to come out from the right slot.

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 lower zipper stopper and a zipper. The lower zipper stopper comprises a lower stopper surface member (4) and a lower stopper bottom member (5). The lower stopper surface member (4) comprises a surface member cylinder (4.3), a hook (4.4) protrudes from an outer peripheral surface of the surface member cylinder (4.3), the hook (4.4) comprises a hook-shaped structure formed by a butt-joint between a guide rod portion (4.4b) and a hook protrusion (4.4a), and the hook protrusion (4.4a) is positioned at the bottom of the hook (4.4) in the axial direction. A main groove (5.3) is provided in the middle of the lower stopper bottom member (5), a bottom member guide protrusion (5.4) and a bottom member limiting protrusion (5.9) are arranged on an inner peripheral surface of the main groove (5.3), the bottom member guide protrusion (5.4) and the bottom member limiting protrusion (5.9) are sequentially arranged in the peripheral direction, and a guide channel (5.11) is formed between the bottom member guide protrusion and the bottom member limiting protrusion. During assembly, firstly, the lower stopper surface member (4) and the lower stopper bottom member (5) are axially aligned; then, the lower stopper surface member (4) and the lower stopper bottom member (5) rotate while axially moving until the lower stopper surface member and the lower stopper bottom member axially abut against each other; and finally, the lower stopper surface member (4) rotates, such that the hook (4.4) is snap-fitted with the bottom member limiting protrusion (5.9), thereby realizing axial limiting. The step of manually determining whether the lower stopper surface member (4) and the lower stopper bottom member (5) are connected in place can be omitted, and use is facilitated.