Locking mechanism of crank lock with two locking states

Abstract

The invention discloses a locking mechanism of a crank lock with two locking states. The real locking state and the false locking state are included. The mechanism comprises an unlocking button, a lock cylinder, a rotating lock tongue and a bird tongue assembly; the unlocking button comprises a button part, a lock cylinder is assembled, and the front end of the unlocking button is hinged to the lower portion of a base, the rotating lock tongue is rotatably connected to the position below the unlocking button , is connected with the lock cylinder and is provided with a protrusion portion, a base body of the bird tongue assembly is assembled with the unlocking button and is provided with a lock tongue head portion, a small lock piece is rotatably arranged behind the base body, and is provided with an abutting slope, through rotation of the rotating lock tongue, the small lock piece is extruded to be downward, and the bird tongue assembly is driven to rotate backwards to shrink into the lock tongue head portion; a lock hole is formed in the position, corresponding to the lock tongue head portion, of a locking end of a handle; a limiting pin is further included, and is located below the rotating lock tongue so as to limit the rotting lock tongue in an abutting manner. Through design of the false locking state, unlocking for door opening through repeated use of a key is avoided, after work is completed, the key is used for achieving real locking, work smoothness and convenience are improved, and work efficiency is greatly improved.

Description

technical field [0001] The present invention relates to a lock, in particular to a locking mechanism of a crank lock. The crank lock includes a straight-pull crank lock and a rotary crank lock, and is suitable for locking objects such as doors and cabinets, especially for Lock the electrical control cabinet. Background technique [0002] Crank locks are widely used in industrial cabinets, construction machinery equipment, communications, medical technology, refrigeration, food industry, environmental technology and rail locomotives due to their advantages of small space occupation and high protection level. At present, the commonly used crank lock includes a base and a handle, and a locking mechanism is arranged between the handle and the base. In the locked state, the handle is locked on the base; when opening the door, it needs to go through the following three steps: the first step, Unlock the locking mechanism between the handle and the base, and pull the handle away fr...

Images