To provide an inner cylinder controlling mechanism capable of temporarily locking an inner cylinder in a predetermined angle position for securing an electricity feeding time to an electromagnetic actuator in a clutch mechanism for an electronic cylinder lock.
A guide cylinder 11 is fixed on the inside of an aperture end edge part of an outer cylinder while being fitted rotationally in the outer end part of the inner cylinder. In insertion of a spare key 12 into a key hole, a guide projection part 14 of the key 12 is allowed to butt to the bottom part center of a circumferential guide groove 16 formed by cutting out the aperture end edge of the guide cylinder 11, and when the key 12 is turned by a fixed angle and the guide projection part 14 abuts on a locking stepped part 21, rotation of the spare key is forcibly prohibited and the inner cylinder is locked temporarily, while the spare key is turned further when it is pulled back slightly so as to pass the locking stepped part over the guide projection part 14.
ISHIKAWA HAJIME
SUGIMOTO TOSHINORI
HATAKEYAMA KAZUHISA
SECOM CO LTD