Newly bought locks are usually equipped with several keys. What's the point?

If the door lock used at home is an ordinary lock, such as a padlock, there are usually five or six keys. If it is an anti-theft door lock, it will usually be equipped with two A keys and five B keys. When decorating, the owner and the foreman each have a key A, and the key B will be owned by the owner. After the renovation is completed, the lock will be unlocked with the B key, not the A key.

1. When installing the door lock, first carefully check the instruction manual of the door lock, and then check whether the thickness of the door is between 4 and 5.5, and the width of the solid part inside the door frame is required to exceed 1 1cm. In addition, check whether the door lock installation accessories are complete, and try to open the door lock with the matching key to see if the door lock can be opened normally.

2. In the process of installing the door lock, first of all, you should open an opening on the door. The position and size of the opening should be operated according to the standard of the opening diagram. The size of the opening should not be too small, otherwise the door lock cannot be installed, and it should not be too large, so as not to affect the beauty of the security door.

3. When installing the door lock, check whether the opening direction of the door lock and the door is consistent, and adjust the position of the lock core. After determining that there is no problem in the installation position, fix the lock cylinder with screws, and finally check whether the lock cylinder can be opened normally.

Origin of lock:

The earliest lock was a simple mechanism designed by the owner to prevent others from opening it. The simplest lock on the door is the latch. In ancient China, there were stone locks without keys, which were tied with ropes or chains. During the Shang and Zhou Dynasties, the private ownership of the means of production further developed, the gap between the rich and the poor further intensified, and social contradictions were very prominent.