| 摘要 |
An axial lead screw having one end pivotally connected to a rearview mirror is threadedly engaged by a motor driven worm gear, which upon rotation effects axial movement of the lead screw. A pair of flux collectors are disposed on opposite sides of the lead screw adjacent the distal end. A Hall effect sensor is disposed in one of the flux collectors. The distal end of the lead screw is magnetized and the Hall effect sensor provides a signal indicative of the lead screw movement. In one embodiment, the lead screw is magnetized; and, in another embodiment a permanent magnet is inserted in a bore in the distal end of the lead screw.
|
