| 摘要 |
A rotary electric switch 1 comprises a base 2 having a rotary actuator 3 mounted thereon, the base 2 including a pair of substantially parallel, spaced apart substrate layers 6, 7 . Each layer 6, 7 has a first surface 9, 10 which faces the other substrate layer 7, 6 and a second surface 11, 12 which faces away from the other substrate layer 7, 6 , the first surface 9, 10 of each layer having an electrically conducting contact 13, 14, 16 provided thereon. At least one of the substrate layers 6, 7 is deformable towards the other so as to effect an electrical connection between the contacts 13, 14, 16 on the two layers 6, 7 , and the rotary actuator 3 includes a projection 21 which engages against the second surface 11 of said deformable substrate layer 6 so as to press it towards the other layer 7 in the immediate vicinity of the projection 21 . In this way, rotation of the rotary actuator 3 moves the projection 21 relative to the substrates 6, 7 and hence varies the point of electrical connection between the contacts 13, 14, 16.
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