| 摘要 |
<p>PURPOSE: To provide a device capable of performing the positioning of a headlight of an automobile, for instance, with high reliability, although various kinds of locations can be taken between both extreme locations. CONSTITUTION: A stepping motor 12 to be controlled by a means capable of detecting the falling of a step is used. Revolution of the stepping motor 12 is transmitted to a gear 15 by a pinion 14 at a reduction gear ratio. A male screw part 19 of a shaft 2 is screwed into a female hole 17 at the center of a hub of the gear 15. The shaft 2 restricts revolution by an end 18 of square cross section and allows only the axial direction moving. The shaft 2 is connected with a part to be controlled via a link. In the case of the falling of a control step, the shaft 2 is automatically returned to a stopper 22 and this device is restarted by an adjusting electronic device operating by an open loop.</p> |
