a kind of lock

Abstract

The invention discloses a lock comprising a shell. A rotary sleeve is arranged in the shell and is internally provided with a lock cylinder. A lug is arranged at the top of the lock cylinder and is provided with a rotary knob cap. The rotary knob cap can drive the lock cylinder to rotate. A plurality of lock pieces are arranged in the rotary sleeve movably and are clamped into the lock cylinder, and thus mutual rotation of the lock cylinder and the rotary knob cap is limited. A key is inserted into the lock cylinder, thus the lock blocks can move and do not clamp the lock cylinder any longer,and the lock cylinder and the rotary knob cap can rotate mutually. A motion stop groove is formed in the outer side wall of the rotary knob cap. An electromagnetic device is arranged in the shell, isconnected with a locking rod aligned with the motion stop groove, and can control stretching and retraction of the locking rod. The locking rod is clamped into the motion stop groove, and thus rotation of the rotary knob cap is limited. A number input plate is arranged on the front of the shell and controls work of the electromagnetic device. The lock has two unlocking modes which do not influenceeach other, and use is very convenient.

Description

technical field [0001] The invention relates to a lock, in particular to a lock with two opening modes. Background technique [0002] A door lock is, as the name implies, a device used to lock a door to prevent others from opening the door. There are many types of door locks, and the requirements for door locks are different in various occasions. Ordinary families generally use anti-theft door locks, which have high security and are relatively cheap. [0003] Now because of social development, people are very busy with work, so they are in a hurry to go out, and often forget to bring the keys. [0004] In addition, there are also people who come back from the supermarket and buy a lot of goods, which makes it inconvenient to take out the keys. Therefore, there is a need for a door lock that can be unlocked normally without using a key. Contents of the invention [0005] Aiming at the deficiencies in the prior art, the present invention provides a lock which is easy to u...

AI Technical Summary

Problems solved by technology

[0003] Nowadays, due to social development, people are very busy with work, so they are in a hurry to go out, and often forget to bring the keys

[0004] In addition, there are also people who come back from the supermarket and buy a lot of goods, which makes it inconvenient to take out the keys

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