The new bicycle anti-picking lock, this kind of lock has five marble holes and a few marbles. It is a small five-tooth lock. The key is made of all copper. Its lock body is an all-clad steel shell with no gaps. Unlike the old bicycle lock, there is an open long curved notch on the lock cylinder shell of the lock body, and there is no bolt. It is equipped with a gear behind the lock core. This button is connected to a shrapnel that just fits into a side slot on the lock core. There is a strong tension spring at the end of the lock cylinder. When you press the button on the bottom of the hospital lock body by hand, the bayonet shrapnel stuck in the lock core will leave the lock core. Under the action of the tension spring at the end of the lock column, the gear on the lock column drives the upper gear of the lock core to make The lock heart turned around. The lock column will shrink back. When the lock core rotates 800 degrees (clockwise), the lock is fully opened. At this time, the key hole is 80 degrees from the original position, and the lock core does not return to its original position. In this way, the billiard card is in the concave tooth groove on the key, the key cannot be pulled out of the key hole, and it is in the state of retaining the key. If it is locked, you need to hold the key and turn it counterclockwise by 800 degrees. The rotation of the lock core drives the gear, and then drives the gear on the lock column to extend the lock column downwards, and the lock is naturally locked. Only then can the key be taken out.