A, B key lock It has AB two keys. It is a type of lock made up of bullets and other structures (the depth of the pit is different, the same as the difference in the depth of the flat key). There are also called "å’”å§é”" and "computer lock". There are also called "partial lock" and "Bai Li lock". The role of the A and B keys is that when people install the lock, the owner can hand over the A key to the house decorator for them to enter and exit the house door to unlock, so the A key is also called the “renovation keyâ€. When the decoration is completed, the owner does not need the decoration personnel to enter the room. After the owner inserts the B key into the lock hole and turns the lock cylinder one turn (circle), the A key loses the function of unlocking, so the B key is also called the “home key.†". The advantage of the AB key lock is that it can meet the needs of people to decorate the house. It is not necessary to remove the key to the door when the decoration is in a hurry, or the person with bad intentions can copy the door open key, etc., which may avoid the insecurities caused by the owner after the decoration. It can be avoided by avoiding the trouble and cost of changing locks for safety after renovation.
First, the difference between A and B keys and the working principle of the lock YNJ China unlock network -
1. For the sake of easy distinction between the manufacturers, the 6 B keys are packaged in a transparent hard case, and the 2 A keys are hung outside. Some A and B keys have different colors. The 2 A keys are yellow and the 6 B keys are white. There are instructions on the back of the 6-B key package. The owner should read it clearly before use, and recognize the use of the two keys. Do not confuse them to avoid improper use of the two keys.
2. If A and B keys are carefully observed, experienced people will find that one of the seven pits above the key is different (the average person does not pay much attention to it, thinks that there are two keys, nothing the difference). The deepest pit at a certain position on the A key, the shallowest (even flat, no pit) corresponding to this position on the B key, generally the position of the 7th or 1st marble. Speaking of the people I want to be here, I must have thoughts in my heart, so I will remind the homeowner that A key must be taken back after use and properly preserved or destroyed.
3. The marble structure in the marble chamber corresponding to the different depths of the A and B keys is special. A steel ball of φ1mm is placed between the upper and lower marbles. When using the A key, the height of the lower marble in the marble chamber plus the height of the small steel ball is just flush with the lock core, so the lock can be unlocked with the A key; when the B key is used, the small steel ball can be used. The top lock cylinder, that is to say, the lower bead and the lock core are flush, so the B key can also be turned to lock the lock cylinder (this principle is the same as the mother key system), after the lock core is rotated by a certain angle, The small steel ball will be subjected to the action of the upper spring and fall into the blind hole that was previously designed on the lock core (this is different from the key system of the child). Some people call this small blind hole a trap, which is very appropriate. . The diameter of this blind hole is larger than that of the small steel ball, but it is smaller than the diameter of the marble. Otherwise, the falling of the marble will make the lock cylinder jam and cannot be unlocked. Once the small steel ball falls into the blind hole, it can only rotate with the lock core, and will not run out of the blind hole. It will not affect the use of the B key, but when the A key is used, there is no small steel ball, so the lower part of the marble chamber The marble cannot be flush with the lock core (the height of the small steel ball is different), and the lock cylinder cannot be unlocked.
1. The lock cylinder is designed to be unlocked outside the door. Therefore, the middle part of the inner and outer lock cylinders is provided with a clutch device. When one side lock core is inserted into the key, the front end of the key will be the top of the plug device on the side. Into the engagement groove in the middle cam (the engagement groove in the cam is a cross groove, so there are two positions for the plug device to enter the slot), and the plug device in the other side slot can be pushed out of the slot ( Otherwise, the inner lock cylinder cannot be rotated, so that the outer lock cylinder cannot rotate to drive the cam to unlock. When the lock cylinder is turned, the plug device drives the cam to move the lock to unlock.
2. There are two ways to position the A and B keys into the depth of the lock cylinder. One is to locate the root of the key (commonly known as "two shoulders"); the other is to position the front end of the key. The function of the positioning is that when the key is inserted, the respective beads can be placed in the appropriate pit, and the front end of the key can engage the insertion device and the cam to drive the cam to rotate. Looking at the following faults, we can know the advantages and disadvantages of the two positioning.
3, A, B key lock produced by regular manufacturers, the quality is still good, each of the beads are anti-dial I-shaped beads (also less than 7 I-beads), plus the lock hole is narrow, use the shackle to unlock Law, there are certain difficulties for beginners, but for experienced people, the general lock can be opened with the dialing method, but the time used is long and short.
4. Unlocking tool: It can be used to open the "one" lock and a tool with a peak at the front end and a slightly curved side of the mountain tip (hook). When the lock cylinder is pulled by the other, the tool is extended into the mountain tip. The peak of the mountain is pointed at the lower bead, and the tool is used to pull the hard bead, and each broken can be unlocked. Because the upper beads have the anti-dip beads, it is necessary to have the experience of dialing the anti-balls to unlock. Because the lock beads are more and the lock hole is narrow, the use of the tool is hindered, and a lot of practice is performed, and the lock can be unlocked. The gap between the lower beads of this lock is not large (the thickness of the key is limited, and the depth of the pit does not exceed the thickness of the key), so in general, the lock is better. There are also multi-tooth tools that are bent at right angles and have a mountain peak on one side for brushing and unlocking, with a limited success rate.
In the practice of unlocking, there will be a tool to open and unlock the lock, and the lock cylinder can be unlocked and must be unlocked. Therefore, it is necessary to use a hook or a steel wire to extend into the lock core hole while rotating the lock cylinder, so that the plug device is reliable. The ground enters the engagement groove of the cam to drive the cam to rotate and unlock.
5, sometimes the keyhole will be artificially into the glue and the like, if there is a key, you can use the heating method to unlock, while heating, use the key to try to open. If there is no "anti-lock", sometimes the insert can be unlocked. If there is a fault in the lock, you can use the method of drilling to break the lock cylinder and then unlock it with the tool.
6. Because the lock can be unlocked outside the door, some people may be afraid to leave the door forgot to bring the key, or the figure is convenient to insert the key into the lock hole in the door as a temporary key. Once you forget to pull out the key in the lock, the door is locked or the door is locked by the wind. The temporarily stored key is often a string. The key in the keyhole is vibrated by the closing door. Under the gravity of the keychain, the lock cylinder will rotate. A small angle, this is the key outside the door can not be inserted in place to make the lock core rotate (because the key in the door rotates a small angle, the top force will not move outward, and the plug device on the outside of the door is pushed into the joint groove to drive The cam rotates and unlocks). At this point, you can use the tool to unlock the lock cylinder (turn 90 °), use the hook or wire to the lock hole to force the insertion device into the other engagement slot, and drive the cam to unlock. Also, shorten the front end of the original key or copy the key to open the lock, so that the key can be inserted to enable the lock cylinder to rotate, and the side of the key work is removed by half, so that the hook or the wire is extended from one side. The plugging device in the middle of the lock cylinder enters another engaging groove to drive the cam to rotate and unlock, and can also be unlocked by means of a blade. Of course, you can also use the method of destroying the door to open the door.
7. Sometimes, when it is in place, the lock cylinder can be turned, but the lock cannot be unlocked. This may be because the front end of the key is short and the plug device cannot be inserted into the engagement groove of the cam, so the lock core cannot drive the cam to unlock. This situation often occurs when the key is located at the root of the key. The treatment method can slightly remove the root of the key, and try to make the key enter a little more, so that the key can push the insertion device into the cam groove to drive the cam to rotate and unlock. It can also be unlocked by the method described in the sixth.
8. Use the A key to unlock the lock. After turning the lock core with the B key, the A key has failed. However, we have already said that the difference between the A and B keys is different. Only one "pit" is different. It is completely possible to use the A key to copy the B key for unlocking. The simpler method is to directly fill the "deep pit" of the A key, or directly attach the small steel ball in the lock cylinder to the "deep pit" of the A key with 502 glue, and then use the unlocking.
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