| 摘要 |
<p>A switch is disclosed comprising a base (1) having therein an elongate first channel (5). A second channel (8) is connected at opposite ends to the first channel and is separated therefrom by an island (9). A rotor member movable on the base has a latch structure pivotally mounted thereon. The latch includes a peg which projects from the latch into one or other of the channels to follow the channel as the rotor is moved relative to the base. The latch structure also includes a wiper arranged to engage the island to divert the peg from the first channel into one end of the second channel in one direction of movement of the rotor. When the peg is in the second channel, it is prevented from re-entering the first channel by moving in a direction opposite to that in which it entered the second channel, thereby preventing the member from moving in the opposite direction. As an ignition switch for a motor vehicle, return to the START position can thus be prevented until the switch has first returned to the OFF position. <IMAGE></p> |
