Suddenly, the bolt of the electric door integrated lock is constantly expanding and contracting, what is the problem?
Hello! Thank you for using our company's products. Because bolt locks work by using electromagnetic coils to generate a magnetic field, the spring force of the bolt’s rebound spring is opposite to the magnetic force generated by the electromagnetic coil, only when the magnetic force generated by the electromagnetic coil is enough to overcome the spring force of the bolt rebound, the bolt will come out to realize the locking action.Bolt locks are easily magnetized in an electromagnetic field environment and produce residual magnetism, the longer the time, the greater the accumulation, and the smaller the magnetic force, therefore, the bolt lock moves more and more slowly, and finally does not move or the bolt cannot be retracted. If the bolt is weak, the bolt will retract automatically.
