| 摘要 |
An objective of the present invention is to provide a key switch in which a worker confined in a dangerous region can unlock inside. A key switch (1A) includes a first slide member moving as an electronic solenoid (25) is driven; a second slide member (48B) that cannot be moved when the first slide member is moved in one direction, and can be moved when the first slide member is moved in an opposite direction; a lock member (49) cooperating with the movement of the second slide member to be moved to a lock position or an unlock position; and lock and unlock manipulation switches (4, 50) installed to allow a worker to manipulate a door outside, so that the second slide member is moved to the lock position and the unlock position. A rear surface unlocking member (51A) is installed inside the door so that the manipulation of the rear surface unlocking member (51A) is possible inside the door. While moving the first slide member to the unlock position through the first manipulation step, the rear surface unlocking member (51A) moves the second slide member to the unlock position in the second step. |
