| 摘要 |
The further provision of a center locking mechanism for locking a first housing and a second housing, where the center locking mechanism comprises a second center locking portion that is formed at the base end of a second housing and a first central locking portion that is attached to the first housing and that interlocks with the second center locking portion, where a rotating operating rod that can be discerned visually from above the board is connected to the first center locking portion, where the rotating operating rod is held, by orientation maintaining means, in a locked orientation wherein the first central locking portion and the second center locking portion are interlocked, and in a non-locked orientation wherein the first center locking portion and the second center locking portion are not interlocked. |
