| 摘要 |
<p>A device for swivelling a mirror in or on a motor vehicle from the normal position (fully reflecting state T) to a non-dazzling position (partially reflecting state T) in the event of a dazzling beam from the headlights of the following vehicle, allowance being made for ambient glare (U), has a voltage source and a motor (M) the shaft (10) of which is connected via a tilting mechanism to the mirror and which is supplied by thyristors (T1, T2). The thyristors are controlled by transistors (TR1, TR2, TR3) with the aid of photodiodes or photoresistors (B, U) for dazzle and ambient glare. A bipolar rotary switch (DS) connected in series to the motor (M) cuts off the current through the motor after a given angle of rotation of the shaft, disconnects the previously conducting thyristor (T1 or T2) from the voltage source and switches it off. The tilting mechanism has a crank disk (11) driven by the motor with a crank pin (12) and a connecting rod (13) which is moved to and fro by the crankpin. The connecting rod is connected to the mirror and has an essentially elliptical opening (14) surrounding the crankpin. The outer regions (15) on the major axis are associated with the switch region of the rotary switch (DS) and the outer regions (16) on the minor axis are associated with the normal and non-dazzling positions (V, T) of the mirror.</p> |
