Can the anti theft door be opened with a key from the inside?

The door that is locked on the outside may not be able to be opened, you need to see what kind of door, if it can be used inside and outside with a key, it can be opened; If the door is double-safe, or if there is only a small lock inside the door, it cannot be opened.

Detailed analysis: 1. If you can open the door with internal and external keys, you can open it.

2. If the door is the kind of double security, use a small lock, and after locking, the outside cannot be opened.

3. If the door only has a small lock on the inside, and there is no keyhole, once it is locked, the outside cannot be opened.

If the inside of the security door is locked with a knob, under normal circumstances, the outside cannot be opened. If there's only one way to pick a lock, it's to find the lock king and pick the lock open from the outside.

After the key outside the anti-theft door is locked, it can't be opened without a key inside, but it should be able to be opened with a key, and now the key can't be opened;

After the inside key is locked, the outside should be able to be opened with a key, but now the key can't be opened;

After the inside is locked with a knob, the outside cannot be opened with a key

There are generally two kinds of anti-theft door locks, one is to use the key to lock from the inside, just like the outside with the key to lock the effect, from the outside with the key can be opened.

The other is a manual lock from the inside (usually a knob), which cannot be opened with a key from the outside.

In addition, you can open the door and do your own experiment to see if it is the most accurate.

The anti-theft door is equipped with an anti-theft lock, which can resist abnormal opening under certain conditions within a certain period of time, has a certain safety protection performance and meets the corresponding anti-theft security level. Generally speaking, the part of the lock body that can be controlled by the key on the outside, if you are inside, how to lock it, of course, can be opened. In fact, many locks can be seen that there is a small lock inside the door, and there is no keyhole outside, so you can't open it outside.

The electronic lock will be relatively better, it can be set up, and it can't be opened at all.

I tried, but it didn't work. I've been working on this issue lately, and I think the lock design is inhuman, and I think it should be like this:

After the outside key is locked, it can't be opened without a key inside, but it should be able to be opened if there is a key, and now the key can't be opened;

After the inside key is locked, the outside should be able to be opened with a key, but now the key can't be opened;

After the inside is locked with a knob, the outside cannot be opened with a key, and this is indeed the case now.

The first and third, both with their own eyes. Because I forgot to bring the key to find the unlocker, this is how the door was opened. Fortunately, it will be locked at home.