| 摘要 |
974,783. Adjustable steering columns; switch arrangements. GENERAL MOTORS CORPORATION. Oct. 24, 1963 [Nov. 19, 1962], No. 42053/63. Addition to 971,252. Heading B7H. [Also in Division H2] An electric switch assembly on an adjustable steering column, comprising mounted in an upper steering column portion 24, an upper shaft portion 12 pivotable in a vertical plane and connected by a universal joint 16 to a lower shaft portion 14 within a lower column portion 50, comprises a switch housing 68, slidably mounted on the lower column portion 50 and connected to the upper column portion 24 by a flexible casing 44 clamped to both housing 68 and upper column portion 24, and a flexible actuator wire 40 slidable within casing 44 in response to movements of lever 28 to cause a contact member 84 slidable within housing 68 to selectively engage contacts 76 fixed to the housing 68. As shown, the switch controls vehicle direction indicators, suitable cancelling and detent mechanisms being provided on the upper steering column portion 24 and contact member 84 is provided with three contacts 78, 80, 82 (Fig. 4) and a projection 86 engaged by a loop on the end of wire 40. The housing 68 is secured by tags 70 (Fig. 4) to a support plate 60 provided with a pair of rivets (Fig. 5) which slide in slots 54, 52 of lower support plate 48 which is adjustably bolted to the lower column portion 50. A helical spring 66 (Fig. 1) mounted between arms 62, 64 on plates 48 and 60 respectively biases the switch housing 68 towards the steering wheel 10. Since flexible casing 44 is clamped to both the upper steering column portion 24 and plate 60, as the upper steering column portion is pivoted plate 60 and housing 68 slide on plate 48 and the lower column portion without altering the position of wire 40 within casing 44 and hence of contact member 84 in housing 68. |
