Safe locks are mainly divided into automatic drop spring type and non-automatic fall spring type. Foreign safes are mostly automatic fall spring type locks; domestic safes are mostly non-automatic fall spring type locks.
Automatic falling spring code lock This is a type of code (usually four groups), the hook and the upper side of the bar automatically fall into the groove next to the wheel disc and the lock tongue by itself, so that Pull the tongue to achieve the purpose of opening. This type of lock has good confidentiality, and usually it can also set the password according to the four groups of numbers it requires, but the price is expensive and it is basically not used in China.
Because the outer circle of the four coded lock discs cannot be absolutely the same, because it is an automatic drop spring, when the dial is rotated continuously in a certain direction, the unlocked hook or cross bar may fall into a certain slot. At this time, there will be a very tiny metal impact sound, which is also the method used to see how to open the safe in the video works. The commonly used opening method is permutation and combination, and the rotation direction is left, right, left, and right.
Non-automatic fall spring type code lock This is a commonly used code lock for domestic safes. The reason why it is called a non-automatic falling spring type lock is because after a good password, you need to turn the handle by hand or turn the key to open the door. When the key is not used to open the lock, the chuck on the sliding plate of the linkage mechanism is blocked by the lock tongue, and the slide plate cannot move; when the dial of the code lock is not properly aligned, the notch of the wheel plate is not in the open position. The flat tongue on the top cannot enter the gap of the three wheel disks, and the linkage mechanism cannot move. This is a double means to limit the opening of the door. Only when the lock has been opened and the password is correct, the linkage mechanism can move without hindrance.
The type of code lock dial is usually divided into three types or four types. The appearance of the three dials is shown in Figure 2. The principle of operation of the dial In order to facilitate the memory and communication, we will be called the first piece near the door of the counter, the middle is called the second piece, the most inside is called the third piece (also known as the dead piece). Each piece has one (some have two on the second piece) metal projection bamboo shoots, called a strap nail. Assume that the word locks three open passwords.
A, B, and C, respectively, because the dead piece is fixed on the lever of the dial, when the operator rotates the dial, the dead piece is driven to rotate together. When the rotation angle is enough, the strap nail on the dead piece comes into contact with the second strap nail and drives the second piece to rotate together; when the rotation continues for a sufficient angle, the second strap pin contact with the first strap nail will drive The first piece rotates together, aligning the code A with the mark on the dial base; this time the notch of the first piece is in the open position. Rotate the wheel plate in the opposite direction again. The dead band's band nails are detached from the second band's band pin and rotate by themselves. The first and second pieces stop at their original positions. When the dead piece continues to rotate and touches the second piece of tape nail, the second piece will be driven to rotate, and the code B will be aligned with the mark on the dial base, and the gap of the second piece will stay in the open position; Rotate the wheel disc in the opposite direction, and the dead band's band nails are separated from the second band's band nails, rotate by themselves, the second sheet stays at its original position, and the code C is aligned with the mark on the dial base. The gap in the third piece stays in the open position. Moving the handle (or turning the key) on the door to drive the linkage mechanism opens the safe.
Speaking about it: Turn the dial three times for the first password, and then turn it twice in the opposite direction (the first number does not appear) for the second number, then turn in the opposite direction directly to the third number, The password for the password lock is correct. When the safe is delivered from the factory, it will tell the dealership number dealership to tell the user the number of the safe, but some use the right, left, and right checkmarks, and some use the left, right, and left checkmarks. Any combination of rehearsal combinations can be used for the three locks.
The point here is to point out that if you turn one point when facing the first or second number, you cannot use the method of turning back a bit in the opposite direction, because when you roll back one point, it is only the third rotation, the first The piece and the second piece stayed in their original positions and did not rotate (this point was mentioned before, so I won't go into details here), so we must revisit the program again.
The method described above for the right three laps and the left laps is cumbersome and not well remembered. The manufacturer has improved the dial. A factory in Zhejiang counterfeit foreign products, and put the rear end of the dead piece on a plastic planetary gear mechanism. Using this structural feature, the disc plate was rotated one revolution, and the dead piece could be rotated three times. In this way, the first number will be directly turned on the dial, and then the second and third numbers will be directly on the left and right. Bringing great convenience to users, this is also the direction of development, that is, relatively expensive.
The continuous improvement of the code lock anti-destructive measures The early production of the code lock is the shape of Figure 2, he has two disadvantages: First, the dial handle is non-cylindrical, easy to fix special tools (called pullers), which will be the word When the disk is pulled out, the door of the cabinet can be opened by losing the lock after the wheel disk is detached; secondly, the dead disk of the disk disk is fixed on the rod of the dial with a split pin, and the shear strength of the split pin is not enough. Easily broken with special tools. After the manufacturer discovered the flaw, he improved it. On the basis of the original, the lever of the dial is screwed on the car, and the nut of M10 is attached and fixed with the split pin. Although the tensile resistance is increased, the fixed screw of the dial base can be broken as long as there is enough tension. , Make the entire code lock off, lose the lock function.
The recent production of the code lock has been improved in terms of pull prevention, and the dial handle is processed into a cylindrical shape, so that it cannot fix a special tool, and it cannot be pulled out with a special tool. However, if the height of the tower is one foot high and the road height is ten feet tall, the door handle can be tightened in the opening direction, so that the flat tongue of the door transmission can be cut into a piece of the word lock, and then clamped in a certain direction by a pipe wrench. When moving, the open pin of the fixed piece can be cut off, so that the pair of pieces fall off and the purpose of opening is also achieved. In order to avoid this happening, the manufacturer has made further improvements, using a spring clip to fix the first and second wheel discs on the dial base, even if the dial is pulled out, the first one, The second piece is still stuck in its original position. Since the gap between the two pieces is not in the open position, the door cannot be opened. Of course, some safes do not have this measure, and you can use this method to open the safe. You must understand this clearly beforehand. You can use this method with 100% certainty, so as not to open the door immediately after the dial is pulled out. On the contrary, it has increased many problems.
The methods described in the unlocking method of the code lock are all based on 100 numbers, and are performed under the premise that the security lock has been opened.
First, the cutting method The so-called cutting method is to move the handle so that the flat tongue of the linkage device tries to insert into the notch of the wheel plate. At the same time, turn the dial by hand, analyze and judge the opening password through the phenomenon and feel. Then, For a good password, open the safe. But how do we know that the password we judged is the first few passwords? In the front of the code lock operation principle, it has been said that a dead circle to the right can drive the second piece to turn to the right and then to the right. A circle can drive the first piece to turn right. At this time, turn the dial to the left. The first and second sheets do not move. Only the third sheet rotates. When the dial is rotated one turn to the left, the second sheet can be driven to the left and then to the left. Turn left to drive the first piece to the left. According to this principle, it can be determined that the cut-out password is the number of the password.
If the handle of the dial is continuously rotated three times or more to the right so that the tabs are in contact with each other, the left hand will open the door handle (or key) in the opening direction, and the right hand will continue to turn the handle of the dial to the right when the rotation is certain. At the angle, the latch will feel a flutter (a sound will be heard and the door handle will turn). At this time, rotate the dial handle to the left. If only a few dials can be turned, it means that the cut number is a dead number; if you can turn nearly one circle, it means that the second number is cut out; Nearly two revolutions indicate that the first number was cut out. The reason for the judgment is difficult to express clearly in words. It is best to actually operate it on the safe and understand the mystery.
The size of the outer diameters of the three disk disks cannot be absolutely the same. There are always large, medium, small, and divided, and the size distribution of each sheet. In order to be easy to understand, in the following explanations, the dial is first rotated to the right.
1. The arrangement of the three-disc disks shown is the best case for the safe.
The cabinet door handle is tightened in the opening direction so that the flat tongue of the cabinet door transmission device is cut into a piece of the code lock, and then clamped with a pipe wrench and moved in a certain direction to cut the cotter pin of the fixed piece. To make the wheel discs fall off also achieve the purpose of opening. In order to avoid this happening, the manufacturer has made further improvements, using a spring clip to fix the first and second dials on the dial base, even if the dial is pulled out, the first one, the first The two pieces are still stuck in their original position. Since the gap between these two pieces is not in the open position, the door cannot be opened. Of course, some safes do not have this measure, and you can use this method to open the safe. You must understand this clearly beforehand. You can use this method with 100% certainty, so as not to open the door immediately after the dial is pulled out. On the contrary, it has increased many problems.
Information from China Safe Exchange/
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