Rearview mirror assembly for automobiles including positioning m

Details Rearview mirror assembly for automobiles including positioning m Rearview mirror assembly for automobiles including positioning m

1989-10-31

1991-01-01

Henry, Jon W.

350637, B60R 106, G02B 718

Patent

active

049813498

ABSTRACT:
A rearview mirror assembly for an automobile includes a base adapted to be mounted on an automobile body and having a substantially vertical support shaft, a rotatable bracket mounted on the base and having a mirror and an electric motor, the rotatable bracket being angularly movable about the support shaft between a normal position and a rearwardly tilted position in response to energization of the motor, and a positioning mechanism for positioning the rotatable bracket in the normal position and the rearwardly tilted position one at a time. The positioning mechanism comprises a plurality of balls partly fitted in a plurality of recesses defined in the base and a plurality of semispherical recesses defined in the rotatable bracket. The recesses of the base have horizontal surfaces. When the rearview mirror assembly moves between the normal position and the rearwardly tilted position, the balls engage only the horizontal surfaces of the recesses of the base. Therefore, the load on the motor remains constant while the rearview mirror assembly is being turned. When the balls leave one end of the recesses of the base and reach the other ends thereof, a change in the load on the motor is detected by a sensor, and a detected signal is applied to a controller which de-energizes the motor. Rather than such a sensor, a limit switch for detecting the position of a mirror housing may be used to de-energize the motor.

REFERENCES:
patent: 4626083 (1986-12-01), Nakayama et al.
patent: 4626084 (1986-12-01), Kumai

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