A zipper head includes a puller, a horse hook, an elastic piece, a cap and a pulling piece. The puller has guiding grooves there inside and an accommodating portion and a penetrating hole on top thereof. The end portion is disposed under the horse hook. One end of the elastic piece is fixed on the puller. Both sides in the interior of the cap are provided with a protrusion respectively. The two protrusions of the cap are located above the fulcrum portion of the horse hook. Via the above arrangement, a function of blocking and restricting the position of the fulcrum portion of a horse hook can be provided, and thus the fulcrum portion of the horse hook cannot be displaced excessively due to an extreme pulling force of the pulling piece. Therefore, the horse hook can be prevented from getting deformed or deviating from a predetermined position.
1. A zipper head for operating a zipper fastener having a pair of zipper rows, comprising:
a puller body having guiding grooves for allowing the zipper fastener to be fitted therein, an accommodating portion formed on a top thereof, a fixing base protruded from one end of a top surface thereof, and a penetrating hole permitting passage from the top surface of the puller body to the guiding grooves;
a horse hook having two ends and a middle portion, the horse hook including a hook portion on one end, and a fulcrum portion on the other end, the middle portion formed an abutting surface, the middle portion being accommodated in the accommodating portion of the puller, wherein the hook portion is movably disposed in the penetrating hole of the puller body;
a pulling piece having a pivoting portion disposed in the accommodating portion and under the horse hook;
an elastic piece, being strip-shaped, the elastic piece including a free end and a fixed end fixed on the fixing base of the puller body, wherein the free end of the elastic piece presses against the abutting surface of the horse hook; and
a cap having a hollow bottom and two protrusions formed in the hollow bottom portion, the cap covering on the horse hook and the elastic piece, the cap being fixed on the puller, the two protrusions of the cap being located on the fulcrum portion of the horse hook directly.
2. The zipper head according to claim 1 , wherein one end of the accommodating portion includes a platen, and the fulcrum portion of the horse hook is fixedly arranged on the platen.
3. The zipper head according to claim 1 , wherein each of the two protrusions has a restricting surface, and the restricting surface of the restricting surface is arranged above the fulcrum portion of the horse hook.
4. The zipper head according to claim 1 , wherein the puller body further comprises at least two blocking portions on both sides of the accommodating portion, and the horse hook is arranged between the blocking portions.
5. The zipper head according to claim 1 , wherein the top of the puller body is provided with a fixing base, and one end of the elastic piece is fixed on the fixing base of the puller.
6. The zipper head according to claim 1 , wherein both sides of the cap are formed with a notch and the pivoting portion of the pulling piece penetrates through the notches.