Cylindrical lock uses the design of turning tongue
At present, there are many kinds of locks used in the room, and the locks used in the office are cylinder locks. This is a kind of locks with a simple appearance, and its internal structure is a kind of turning tongue. This kind of lock tongue is different from the present telescopic tongue. It is a rotating type of lock tongue. By matching the lock cylinder with the key, the turning tongue can rotate. When it rotates parallel to the horizontal plane, it is just vertical to the door frame, which has the effect of dislocation, blocking the door and locking it, otherwise, it has the effect of unlocking it.
This is the current characteristics of tongue-turning, and when it comes to cylinder locks, this kind of lock is actually a development of tongue-turning locks. For the more telescopic tongue locks used now, it is still more than tongue-turning locks. Because this kind of lock needs less space than tongue-turning locks, and is safer than tongue-turning locks, so this kind of lock is more safe than tongue-turning locks. Locks have gradually become the mainstream locks. And now the combination of retractable tongue lock and lock core is used in anti-theft door, which is now the mainstream anti-theft door lock.