Patent ID: 7956299
Filing Date: 2011-06-07
Classification: F16H,H01H

Abstract:
1. An inhibitor switch for an automatic transmission comprising: an insulative, plastic stationary contact board; a metallic detent plate moving depending on a select position of a select lever for an automatic transmission, wherein the stationary contact board and the detent plate are arranged to be opposed to each other while permitting relative rotation with each other around a common shaft, and the stationary contact board is provided with metallic stationary contact points; and an insulative, plastic movable contact board engaged to the detent plate, wherein the movable contact board is provided with metallic movable contact points at positions facing the stationary contact points to slide on the stationary contact points, wherein the stationary contact board rotatably supports the common shaft at a shaft support portion, the detent plate is fixed to the common shaft, and by detecting a change of an electrical connection pattern in accordance with a sliding position of the movable contact point to the stationary contact point when the detent plate rotates with rotation of the common shaft, a shift range position for the automatic transmission is detected, wherein: the movable contact board is provided with a shaft support portion for supporting the common shaft and also with boss portions extending toward the detent plate; the detent plate is provided with through bores engaged to the boss portions and the through bore is formed as an elongated bore extending along a radial direction of the common shaft; a dimension of the through bore in a direction of the shaft circumference is configured to have a regulation dimension equivalent to an outer dimension of the boss portion; and an engagement of the movable contact board to the detent plate is realized by fitting the boss portion to the through bore.