A method for switching a cathode lock between a normally-opened state and a normally-closed state, comprising:
- providing a lock body mounted on a door or on a door frame and a lock tongue capable of locking with the lock body;
- providing a lock catch capable of locking with the lock tongue arranged on the lock body;
- providing a solenoid capable of generating an electromagnetic force when electrified also mounted on the lock body;
- providing a breaking apparatus capable of jamming the lock catch connected to one end of the solenoid;
- providing a breaking rod movably installed on the lock body;
- connecting the breaking rod to the solenoid;
- circularly arranging a breaking block capable of jamming the lock catch on the breaking rod;
- fixing the breaking block on the breaking rod via a fastening screw set on one side of the breaking block, such that the position of the breaking block on the breaking rod can be regulated/adjusted by loosening the fastening screw;
- switching to the normally-opened state by loosening the fastening screw and adjusting the position that the breaking block is placed on the breaking rod for separating the breaking block from the lock catch, screwing up the fastening screw for securing the breaking block on the breaking rod, thereby unlocking the door, such that when closing the door, the solenoid is electrified and the spindle of the solenoid drives the breaking rod into motion via the action of the electromagnetic force, and the breaking rod drives the breaking block thereon into motion, which, in turn, causes the breaking block to be abutted against the lock catch, thereby locking the door;
- and
- switching to the normally-closed state by loosening the fastening screw and adjusting the position that the breaking block is placed on the breaking rod for abutting the breaking block against the lock catch, screwing up the fastening screw for securing the breaking block on the breaking rod, thereby locking the door, such that when opening the door, the solenoid is electrified and the spindle of the solenoid drives the breaking rod into motion via the action of the electromagnetic force, and the breaking rod drives the breaking block thereon into motion, which, in turn, causes the breaking block to be separated from the lock catch, thereby unlocking the door.