| 摘要 |
PROBLEM TO BE SOLVED: To solve the following problem: fraudulent unlocking is desired to be capable of being recognized, in a distribution process of a lock for being provided in a game machine and the like.SOLUTION: A lock, which is a lock with a keyhole, includes a filling member which is infilled into the keyhole to a position not to protrude from an opening surface of the keyhole and which cannot be nondestructively removed from the keyhole. In the filling member, the top of a surface exposed from the opening surface can have a recess for guiding an operation in which a tip of an extraction jig for nondestructively extracting the filling member is inserted into the filling member. The filling member can have a coating material provided within the recess.SELECTED DRAWING: Figure 4 |
