THREE-CLAMP TYPE LOCKSET

摘要

A three-clamp type lockset comprises a lock shell (1), a three-clamp leaf spring (2) and an eccentric wheel (3). The leaf spring (2) is installed in the lock shell (1) and has a hole (12) which is adapted to the eccentric wheel (3). The leaf spring (2) moves back and forth by the rotational movement of the eccentric wheel (3) in the hole (12). A holding boss (7) for supporting the leaf spring (2) is set in the lock shell (1). The eccentric wheel (3) is a sector eccentric wheel, the shape of the hole (12) which is adapted to the eccentric wheel (3) is a combination of a rectangle and a semi-circle. The inner end face of the holding boss (7) is an inclined face, which is inclined upwardly at the orientation where the leaf spring (2) protrudes. The present three-clamp type lockset, when the eccentric wheel (3) rotates 180° clockwisely for locking profile bars, the side face of the sector eccentric wheel contacts the rectangle's linear side of the hole of the leaf spring closely. In this way, the tension arm for stopping is greater than the tension arm for stopping of the conventional same type lockset which comprises a circle eccentric wheel or an eccentric wheel having a stopping boss. The present lockset increases the side stopping moment effectively and reduces the possibility of the failure.