| 摘要 |
PURPOSE:To eliminate backlash of a gear train device by engaging a coiled spring in such a manner that both auxiliary gears give a habit of turning in the opposite direction to each other, and pressing both auxiliary gears to a driving gear and a driven gear by the coiled spring. CONSTITUTION:A motor gear 1 is engaged with a large-diameter gear 5a and an auxiliary gear 6, and the auxiliary gears 6, 7 are pressed to the motor gear 1 and the platen gear 3 by elastic force of a coiled spring 9. Accordingly, the tooth of the motor gear 1 is clamped by the tooth of the large-diameter gear 5a of the two-stage intermediate gear and the tooth of the auxiliary gear 6 to be rotated, and the tooth of the platen gear 3 is clamped by the tooth of a small-diameter gear of the two-stage intermediate gear and the tooth of the auxiliary gear 7 to be rotated. Thus, backlash of the gear train device can be eliminated. |
