Multi-position electrical switch.

摘要

A multi-position electrical switch for controlling a rearview mirror of a motor vehicle comprising a PC board (21) provided in a casing, an insulating rubber sheet (24) arranged on the top of the PC board and having a plurality of movable contacts, a tiltable control knob (16) arranged on the top of the insulating rubber sheet and a light emitting element (34) arranged at the center in the control knob. A cylinder for containing the light emitting element is formed at the center of the control knob and the lower end face of the cylinder is formed in four curved surfaces made by intersecting the body of the cylinder by a quadrangular prism having a large vertex angle. The tilting angle of the knob is controlled by said curved surfaces and by stoppers projected at the four corners of the lower surface of the knob. The insulating rubber sheet has hollow truncated conical swells (25) to which the movable contacts are attached. After the knob of a slide switch for selecting the right or left side rearview mirror has been actuated to select either the right or left side rearview mirror, when the control knob is inclined, the movable contacts of the pressed side are depressed downward to close the stationary contacts on the PC board. Thus, an electric motor in the rearview mirror body is driven to adjust the tilting angle of the mirror in the horizontal or vertical direction. The motor is driven while the control knob is being pressed continuously and if the pressing of the control knob is released, the swell is recovered to lift the movable contact and to open the circuit, thereby stopping the motor for adjusting the arbitrary tilting angle.