Lever or switch position recording system e.g. for vehicle automatic transmission gearbox selector

摘要

A position detecting switch has a control unit 13 for controlling the operation of an automatic transmission, and a position detecting device generally composed of a rotary member 6 rotatable together with the operation of a shift lever 2, a light emitting element 12a and light receiving elements 12b. The position detecting device is switched on or off in accordance with whether any of the light receiving elements receives light from the light emitting element. The on and off states of the device are changed over by rotating member 6. The member 6 may have reflective portions or apertures for light transmission. Permanent magnets and Hall effect sensors may be used instead. The position detecting device and the control unit are contained in a single casing 4.