| 摘要 |
A spinning reel reciprocation mechanism includes a freely rotatable screw shaft which has an outer circumference in which a plurality of helical grooves are formed, a pinion gear which has a rotational speed ratio of at least 1.5 relative to the screw shaft, a slider which has an engaging member that engages with the helical grooves. The slider is adapted to perform reciprocating motion in response to rotation of the screw shaft.
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