Patent ID: 7174859

Claim:
An adjustable pet collar, comprising: a long chain; an adjuster, constructed by a upper cover and seat body, a slit being opened on said upper cover and a slanting channel is disposed on said seat body, said chain being placed through said channel, and a sliding groove in which one end thereof is closed perpendicular to said channel being disposed at one side of said channel, and a recess groove being disposed at another end thereof, an inserting pin seat being installed in said sliding groove, an elastic element being installed between said inserting pin seat and the closed end of said sliding groove; whereby, the size of said collar formed by said chain is adjusted by said inserting pin seat, said inserting pin seat including a main body, located in said sliding groove, a circular hole for accepting said elastic element is disposed at one end of said main body propped against by said elastic element and a inserting pin for being inserted into a chain unit of said chain is disposed at another end thereof; a pushing mass, extended out of said slit opened on said upper cover; and a connecting neck, disposed between said main body and said pushing mass, the width thereof is smaller than the width of said slit and is installed in said slit.