| 摘要 |
PURPOSE:To enable detection of a type position by means of a single detecting plate and a gate circuit with a less number of detection brushes for a reference position signal by shutting off the detection plate and the detection brushes at a constant rotational interval mechanically, using a reference position signal shutoff gear. CONSTITUTION:A detection plate 2 is engaged with a rotational shaft 9 under pressure by means of a transmission gear 3. A reference position signal shutoff gear 4 is set in a fixed shaft 1a of a frame in such a manner that said gear may be positioned over the detection plate 2. Further the reference position signal shutoff gear 4 is engaged with the transmission gear 3, so that the shutoff gear may rotate with the rotational shaft 1 and a detection plate 4 at a rotational count ratio of 1:4. A detection brush for reference position signal 5 is engaged with a protrusion of a cover 10 using caulking. An electric contact part 5a at the tip of the frame is set in touch with the detection plate 2 through a hole part 4b of the reference position signal shutoff gear 4 by fixing the cover to the frame. In addition, a cam contact part part 5b of the detection brush for reference position signal 5 is engaged with a cam part 4a of the reference position signal shutoff gear 4, and the brush 5 moves vertically by rotation of the shutoff gear 4. |
