Device for pivoting a motor-vehicle mirror from the normal position to a non-dazzle position
First Claim
1. In a device for pivoting a motor-vehicle mirror between a normal fully reflecting position to a non-dazzle partly reflecting position in response to the presence of glare from the headlight of a following vehicle and ambient light conditions, said device comprising a voltage source, a motor having a shaft acting upon said mirror through a tilting mechanism, and first and second thyristers controlling energization of said motor, and circuit means for energizing and de-energizing said thryisters in accordance with the presence of glare and interference from ambient light, the improvement wherein said circuit means includes a bipolar rotary switch connected in series with said motor, said switch interrupting the flow of current through said motor at specific angles of rotation of the shaft of said motor, disconnecting the previously conducting thyrister from the voltage source and switching it off and wherein the tilting mechanism comprises a crank-disk driven by said motor with a crank pin and a connecting rod which is moved back and forth by means of said crank pin, said connecting rod being connected to said mirror and having a substantially elliptical opening surrounding said crank pin, said elliptical opening defining areas of greater and lesser radial extension, the areas of said opening of lesser radial extension being associated with the normal and non-dazzle positions of said mirror and the areas of greater radial extension of said opening being associated with said specific angles of rotation of the shaft of said motor.
1 Assignment
0 Petitions
Accused Products
Abstract
Device for pivoting a motor-vehicle mirror in or at a car from the normal position (fully-reflecting condition V) to a non-dazzle position (partly-reflecting condition T) in the event of excessive glare (B) from the headlight of a following vehicle and taking into account any interference from ambient light (U), said device comprising a voltage-source, a motor (M), the shaft (10) of which acts upon the mirror through a tilting mechanism and which is fed from thyristors (T1 and T2) which are, in turn, controlled by transistors (TR1, TR2 and TR3) with the aid of photodiodes or photoresistors (B, U) for glare and interference from ambient light. A bipolar rotary switch (DS) is connected in series with the motor (M), said switch interrupting the flow of current through the motor in accordance with a specific angle of rotation of the shaft thereof, disconnecting the previously conducting thyristor (T1 or T2) from the voltage-source and switching it off. The tilting mechanism comprises: a crank-disc (11) driven by the motor with a crank-pin (12) and a connecting rod (13) which is moved back and forth by means of said crank-pin, which connecting rod is connected to the mirror and is designed with a substantially elliptical opening (14) surrounding said crank-pin, the areas (15) thereof of greater radial extension being associated with the switching area of the rotary switch (DS), while the areas (16) of lesser radial extension are associated with the normal and non-dazzle positions (V, T) of the mirror (FIG. 1).
5 Citations
6 Claims
- 1. In a device for pivoting a motor-vehicle mirror between a normal fully reflecting position to a non-dazzle partly reflecting position in response to the presence of glare from the headlight of a following vehicle and ambient light conditions, said device comprising a voltage source, a motor having a shaft acting upon said mirror through a tilting mechanism, and first and second thyristers controlling energization of said motor, and circuit means for energizing and de-energizing said thryisters in accordance with the presence of glare and interference from ambient light, the improvement wherein said circuit means includes a bipolar rotary switch connected in series with said motor, said switch interrupting the flow of current through said motor at specific angles of rotation of the shaft of said motor, disconnecting the previously conducting thyrister from the voltage source and switching it off and wherein the tilting mechanism comprises a crank-disk driven by said motor with a crank pin and a connecting rod which is moved back and forth by means of said crank pin, said connecting rod being connected to said mirror and having a substantially elliptical opening surrounding said crank pin, said elliptical opening defining areas of greater and lesser radial extension, the areas of said opening of lesser radial extension being associated with the normal and non-dazzle positions of said mirror and the areas of greater radial extension of said opening being associated with said specific angles of rotation of the shaft of said motor.
Specification