US Patent 9631399 Miniaturized electronic cam lock

A very small and efficiently compact electronic cam lock has a motor-driven worm drive lock/unlock actuator that moves a blocking pin to block or to allow unlocking rotation of a locking cam of the device. A spring in the actuator provides for the actuator to move to the locking position while the cam is still in the unlocked position, but to spring into the locking position when the cam is moved back to the locking position. The lock housing includes a threaded bore for a mounting machine screw, strategically placed within the limited space of the lock mechanism.