| 摘要 |
<p>The system is designed to position control elements which can each take up at least two predetermined positions. For example a shutter (11) in an automobile heater circuit. The system has a manual control element, a motor (1) which can rotate in both directions and a position detection element (7). The position detection element (7) is connected to a transmission element which adjusts the position of the shutter and is also connected to the motors supply source. This latter connection stops the motor when the shutter is in one of its predetermined positions. The transmission element rotates at least a first element such as a first pulley (3) which itself drives a second pulley (9) be means of a belt (8). The second pulley (9) being fixed to the rotational axis (10) of the shutter (11). The transmission element has a reduction gear unit whose output drives a wheel (4) fixed to the first pulley (3). The reduction gear has a control fin (5) which controls a bistable invertor (7) which forms the position detection element.</p> |
