If the lock cylinder cannot rotate, it means that there is something wrong with the lock cylinder.

Generally, the main function of the lock cylinder is to transmit torque from the head, and then drive other parts of the lock, so that the lock can be opened and closed. First, check the specific reason why the lock cylinder cannot rotate. If the lock pin is stuck on the key and the slip, you can use rust remover, spray it into the keyhole and move the key.

Extended information:

Bicycle locks play the role of anti-theft bicycle locks. There are bicycle locks with different functions on the market. In the early days of reform and opening up, many people called for strengthening the safety of bicycle locks;

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The passwords for combination locks are usually just permutations rather than real combinations. Some combination locks only use a turntable to rotate several discs or cams in the lock; some combination locks turn a set of dial rings engraved with numbers to directly drive the mechanism inside the lock.

New bicycle anti-pry lock. This lock has five pin holes and several pins. It is a small five-tooth lock. The key is made entirely of copper. Except for the key hole, there are basically no gaps in other parts of the lock. Moreover, the lock shell is made of all steel and is relatively strong. Therefore, if the average thief uses a screwdriver or a small crowbar to pick this kind of lock, he will not be able to open the lock at all. The installation of this lock is the same as the old-fashioned bicycle lock. It is fixedly installed on the bicycle tripod to block the wheel and prevent the wheel from rotating.