| 摘要 |
PROBLEM TO BE SOLVED: To remove backlash between a gear and a pinion even after abutting of a driven body onto a stopper by energizing a driven body transmitting rotational movement of the gear through compression springs in the compressive direction of the compression springs under the condition of abutting of the driven body onto the stopper. SOLUTION: Respective compression springs 20, 21 are provided extending over between a pair of first hold openings 22 formed in the condition of sandwiching a fixed shaft 11 on a gear 14 and a pair of second hold openings 23 formed on the lower part of the driven body 12 corresponding to the respective first hold openings 22, and a stopper 30 positioning and stopping the driven body 12 is provided on the upper part of a supporting member 3. Hereby, when the driven body 12 in the horizontal state drives, continuously even after abutting onto the stopper 30, a motor 2 to rotationally move the gear 14 in the compressive direction of the compression springs 20, 21, restoring force of the respective compression springs 20, 21 generates rotational moving action in the reverse direction of the gear 14, and hence backlash between the gear 14 and a pinion 17 can be perfectly removed.
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