| 摘要 |
PROBLEM TO BE SOLVED: To ensure smooth operation of a half tumbler by making a foreign matter, which enters from a key insertion hole into a tumbler insertion hole, escape to a locking recessed part side, in a cylinder lock where a half tumbler spring-energized to a side engaging an engaging part with a locking recessed part of a cylinder body is inserted into a tumbler insertion hole of a rotor so as to disengage the engaging part from the locking recessed part in response to the insertion of a normal mechanical key into a key insertion hole.SOLUTION: The inner surface 54 of a tumbler insertion hole 21 is formed to include: a guide part 55 which extends in the movement direction of a half tumbler 32 so as to approach and face the half tumbler 32; and a passage forming part 57 which makes a clearance between it and the half tumbler 32 larger than that of the guide part 55 so as to form an escape passage 59 extending in the movement direction of the half tumbler 32 while facing a side edge part of a key insertion hole 14, and opening both ends thereof to the outer surface of the rotor 13. |
