| 摘要 |
A manual switch that has a built-in rigid lock lever having one end seated in the switch actuator, biased by a helical compression spring, and having a detent at the other end that snaps into a hole in the frame when the switch is released to return to its off position to lock the switch off. A thumb-operated release button when depressed pivots the lock lever to separate the detent from the hole thereby to allow reoperation of the switch actuator. The rigid lock lever is angularly disposed so that attempted forcing of the switch actuator without depressing the release button tightens the locking engagement to absolutely prevent operation. |
