| 摘要 |
<p>In a reversible motor-operated wiper mechanism including a rotary gearwheel through which drive is imparted to a wiper from the reversible motor, a device is provided for operating a limit switch for stopping the motor at a parked position of the wiper. The device has an annulus and integral cam form and neck disposed under the gear wheel and rotatable relative thereto. An arcuate plate is rivetted to the underside of the gearwheel and includes a downwardly projecting plate portion. During forward rotation of the gearwheel, an abutment surface of the plate portion engages the neck to drive the annulus and cam form. In this direction, a spring urges the cam form upwardly so that a plunger of the limit switch does not lie in the path of movement of the cam form. In the reverse direction of rotation of the gear wheel, a ramp surface on the plate portion urges the cam form downwardly so that the limit switch is operated.</p> |
