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Anonymous users2024-01-24The marble chamber in the pit corresponding to the different depths of the A and B keys has a special structure and is equipped with a 1mm steel ball between the upper and lower marbles. When the A key is used, the height of the lower marble in the marble chamber plus the height of the small steel ball is just flush with the lock cylinder, so the lock cylinder can be unlocked by twisting the lock cylinder with the A key; When using the B key, just the small steel ball can be pushed out of the lock cylinder, that is to say, the lower bead and the lock cylinder are flush at this time, so the B key can also be twisted to open the lock cylinder (this principle is the same as the mother and son key system), but when the lock cylinder rotates at a certain angle, the small steel ball will be affected by the action of the spring spring, and fall into the blind hole that is cleverly designed on the lock cylinder in advance (this is the difference with the key system), some people call this small blind hole a trap, very appropriate. The diameter of this blind hole is larger than the small steel ball, but smaller than the diameter of the marble, otherwise the marble will fall and the lock cylinder will be stuck and cannot be unlocked.
Once the small steel ball falls into the blind hole, it can only rotate with the lock cylinder, and will not run out of the blind hole, which will not affect the use of the B key, but because there is no small steel ball when using the A key, the lower ball in this marble room can not be flush with the lock cylinder (the height of the small steel ball is different), and the lock cylinder cannot be unlocked.
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Anonymous users2024-01-23I picked the lock, and the security door is very simple. But I don't want to draw you anymore. An anti-theft door is a door with the addition of a heaven and earth and an anti-theft lock.
And the anti-theft lock drives the heavens and the earth. Lock the door on three sides. It's too simple, it's rare to draw, just look at your own security door.
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Anonymous users2024-01-22Magnetic anti-theft, that is.
Mall. The goods are magnetic anti-theft, and it will be fine if the cash register is demagnetized.
--That is, the goods in the shopping mall have magnetic anti-theft, and it will be fine if the cash register is demagnetized.
--In general, it is still ...... the principle of 0 and 1
When 0+0, there is no alarm, and when 0+1, the alarm is ......
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Anonymous users2024-01-21There are AB locks with A key and B keys.
Two sets of unlocking systems. After using the A key, just insert another key and turn it, and the spring inside is reassembled. In this way, the A key does not match the system of opening the door again, and it will be again.
Nor can I open the door. ，
There are many types of anti-theft doors on the market, according to the Ministry of Public Security promulgated the standard GB25 92 "General Technical Conditions for Anti-theft Security Doors", anti-theft doors can be divided into three types: fence anti-theft doors, physical doors and composite doors. Types of security doors. At present, there are many types of anti-theft doors in China, mainly including push-pull fence anti-theft doors, casement fence anti-theft glass door series doors, plastic embossed anti-theft doors and multi-functional luxury anti-theft doors. >>>More
It's very simple, go to any factory in Yongkang, Zhejiang, and look at it in an afternoon, and you'll know it, hehe, if you don't look at it, how can you write it.
The principle is simple, but it cannot be said.
The electronic anti-theft door mainly relies on the ID recognition function of the second signature of the smart IC card, and the mechanical motor is driven by the motherboard to realize the opening and closing of the anti-theft door. At present, the main problem that needs to be solved is the intelligent reading and signing technology of IC card, and it is particularly important to do a good job in electronic intelligent signing and anti-theft technology in today's flood of electronic social technology.
Haha, maybe you need to lubricate, put some oil. Leave it alone, just work fine. If you choose the security door of Changling, this situation will not occur.