| 摘要 |
PROBLEM TO BE SOLVED: To moderate the impact force when a switch changed over to extend the life by forming an inclined surface of the edge part in the relatively moving direction on the conductive surface of a surface electrode making contact with the other electrode. SOLUTION: The protruding part from the cylindrical part 17 of a rotary shaft 16 supported in such a manner as to be rotatable around the axis and slidable in the axial direction within the casing K of the body part 11 of a sensor S and slidnable is fitted into an annular member 18 having a detecting body 10 fitted to the circumferential surface thereof. A sliding electrode G having first and second sliding contacts G1, G2 which is integrally formed on metal is mounted on a disc-like mounting part 21 mounted on the lower part of the shaft 16, and brought into contact with a rotation detecting base 24 on the bottom surface. Concentrically circular first and second strip electrode L1, L2 are formed on the part where the metal foil of a printed board is slid in opposition to the contacts G1, G2 of the base 24 by etching removal and buffing. The circular lengths of the electrodes L1, L2 are set so as to correspond to rotating angles 90 deg.,αdeg. of the detecting body 10. According to this structure, the circular edge part CE of the electrode L1 is formed into a curved surface.
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