Cathode lock and method allowing the cathode lock to switch between normally-opened state and normally-closed state

摘要

A cathode lock comprising: a lock body (1) mounted on a door or on a door frame and a lock tongue capable of locking with the lock body (1). A lock catch (6) capable of locking with the lock tongue is arranged on the lock body (1). A solenoid (9) capable of generating an electromagnetic force when electrified is also mounted on the lock body (1). A braking apparatus (10) capable of jamming the lock catch (6) is connected to one end of the solenoid (9). The solenoid (9) is electrified to generate the electromagnetic force, and the braking apparatus (10) is driven into motion under the effect of the electromagnetic force, thus allowing the braking apparatus (10) to either be abutted against or separated from the lock catch (6). Also disclosed is a method for the cathode lock to switch between a normally-opened state and a normally-closed state.