| 摘要 |
<p>PROBLEM TO BE SOLVED: To securely lock a separated member without mistaking the operating procedure, and to enable an operating state to be recognized at a glance. SOLUTION: This lock mechanism comprises: a first hook member 11 for detachably locking a battery box 8 and releasing the lock by operating a first operation button 17 against a coil spring 16; and a second hook member 12 for detachably locking the battery box 8 and changing over a switch and releasing the lock by moving in accordance with an operation of a second operation button 27. The operation buttons 17 and 27 are positioned in a long hole 18 in a state where the operating directions of the operation buttons 17 and 27 are coincident. Consequently, when the lock is released by operating the first operation button 17, the second operation button 27 is moved and the switch is changed over. Even when the first hook member 11 is returned by the coil spring 16 and is locked, the second hook member 12 is not moved. Therefore, the battery box 8 can be certainly locked without erroneous operation procedure and, moreover, the operating states of the hook members 11 and 12 can be recognized at a glance.</p> |
