What's the difference between the decoration key and the official key? Why won't the renovation key expire?

After paying the property fee, the property will give you the key, and the property will tell you that this is the decoration key and the official key. Official keys cannot be used during renovation. If the official key is used, the decoration key cannot be used, so many people don't understand why. What's the difference between the decoration key and the official key? Why won't the renovation key expire? After paying the property fee, the property will give you the key, and the property will tell you that this is the decoration key, which is the official key. Official keys cannot be used during renovation. If the official key is used, the decoration key cannot be used, so many people don't understand why and how to distinguish the decoration key from the official key. Then I'll tell you the difference between the decoration key and the official key? Why won't the renovation key expire?

The difference between decorative keys and official keys

1、? Decoration key? To put it bluntly, it is equivalent to a temporary key. Now all security doors have two sets of keys. Call the key? Decoration key? , also known as the A key, and the other key is called. Official key? Also known as B key, once the official key is inserted into the keyhole, the decorative key will be destroyed. The advantage is that you don't need to change the lock cylinder.

In fact, there is basically no difference between the two keys from the naked eye, but if you look closely, there are still some differences between the two keys in the tooth hole. If you look closely, you will find that one of the seven pits on the key is different. The deepest pit in a certain position of the A key is the shallowest pit corresponding to the position on the B key, which is generally the position of the 7th or 1 marble.

3. The marble structure of AB key pit with different shades is special, and 1mm steel balls are installed between the upper and lower marble.

When using the A key, the height of the marble in the lower layer of the billiard room plus the height of the small steel ball is just flush with the lock core, and the lock core can be turned to unlock with the A key. When using the B key, the small steel ball can just be pushed out of the lock core, and at this time, the lower steel ball is flush with the lock core, so you can also rotate the B key to unlock the lock.

Why won't the decoration key be invalid?

The decorative key will automatically become invalid. Maybe the key is taken by mistake, because there is a similar stopper setting in the door lock, once it is started, it cannot be reversed, and the decorative key will naturally be scrapped and cannot be used.

1, generally speaking, we call the decoration key a key and the official key b key, also known as the master key. Decoration key A is used and kept by the decoration construction team. After the renovation work is completed, the right of the renovation construction team to freely enter the house will be terminated.

2. The concrete principle is that in the anti-theft door lock, there is a marble structure in the marble room with pits of different depths, and there is a 1mm steel ball device between the upper and lower marble. When we use the decorative key, the height of the marble in the lower layer is just flush with the lock core, which can realize normal rotation and unlocking.

The above is the difference between the decoration key and the official key I introduced. Why won't the renovation key expire? We know that we need to use the decoration key when decorating, so we don't need to change the door lock after the decoration is completed, so we don't use the official key before moving in. If you use the official key, you need to wait until the renovation is completed.