To determine the broken core is not bad, how to judge
The general small ball or gear is relatively easy to open. There are A-level, B-class, ultra-B-level cylinder, how to distinguish: A-level anti-theft lock key is a word key and cross key. A-level cylinder internal structure is very simple, limited to the changes in the ball, the ball slot less shallow. Anti-technical open time 1 minute, the opening rate is extremely high. The ball structure is a single row of balls or a cross lock. B-level lock key for the flat key, a double row of marbles slot, with the A-level lock is different from the key surface of a row of curved irregular lines. The main type of lock cylinder is 3, the computer double row cylinder, double row crescent cylinder, double blade cylinder core. Anti-technical open time 5 minutes, the mutual high rate. Through the torsion tool, 1 minute can open the cylinder.
The first may be your lock is fixed too tight, causing the key to screw the head, resulting in rebound when the lock body can not drive the tongue rebound;
The second possibility is the lock body problem, inside the mechanical transmission device has a problem, so that the tongue can not rebound.
From the door to the material on the distinction, from good to bad followed by copper, stainless steel, zinc alloy, aluminum, iron. In the price is not necessarily copper than stainless steel, the material is solid and hollow. In the choice of time to carefully weigh the weight.
The third is security. The lock core is the key to the key to a lock. Small is related to the loss of items, large is related to the safety of life. So when you choose the lock to be particularly important to this point.
1, from the cylinder material to distinguish: the price is not necessarily copper than stainless steel, the material is solid and hollow. In the choice of time to carefully weigh the weight;
2, the size from the keyhole: the lock cylinder is not bad, the key can be inserted into the bad words can not be inserted into the;
3, see the color: the color of the cylinder should be bright pure, not very dark and hurry, there is a rough feeling is bad;
