Abstract: A snap hook includes a main body having hook and sleeve portions extending from a base, ends of the hook portion and sleeve portions being opposed to each other to define an opening of the hook portion; a pin which moves back from and towards the end of the hook portion so as to open and close the opening, the pin including an operating portion including a ridge exposed to outside through a sliding slit of the sleeve portion; and a spring for biasing the pin toward the end of the hook portion so as to achieve contact. The main body includes a restraining wall which extends from the base and between the sleeve portion and the hook portion, toward a connection where the hook portion is joined to a connection object so as to restrict the connection between the end of the hook portion and the connection object.

Abstract: A snap hook for an animal leash is configured to include a main body, a ring, a slide bar and a spring. The main body may include a base, a hook portion extending from the base, a sleeve portion having an end and being provided with a slit formed along a direction of the length of the sleeve portion, and a restraining plate extending from the base and between the hook portion and the sleeve portion toward the connection part. The ring may be rotatably connected to the base and the slide bar may be encased in the sleeve portion. The spring may bias the slide bar toward the end of the hook portion.

Abstract: A snap hook for an animal leash is configured to include a main body including a base, a tip portion positioned opposite to the base, a side face, and a forked portion extending from the base and positioned adjacent to the tip portion, the forked portion having a first prong and a second prong defining an opening therebetween for accepting an object, a slidable hook formed in the shape of the letter C and encased in the main body in a manner where the slidable hook can be rotatable back and forth, the slidable hook including a connection part closing the opening and being adapted to accept the object, the slidable hook including an operating part exposed from the side face for moving the slidable hook backward by an externally applied force, a ring rotatably connected to the base on an axis, and a spring for biasing the slidable hook toward the second prong to close the opening, the opening being opened when the biased connection part is moved from the second prong to the first prong, and the operating part b