| 摘要 |
PROBLEM TO BE SOLVED: To shorten a movement stroke of a rack.SOLUTION: In a gear mechanism 36, a main large gear 42 of a main pinion 38 and a sub large gear 48 of a sub pinion 44 are meshed, a rack 54 is moved and is meshed with a main small gear 40 of the main pinion 38 and a sub small gear 46 of the sub pinion 44. Thus, the main pinion 38 and the sub pinion 44 are rotated by the rack 54, and the main pinion 38 is rotated by the sub pinion 44. Therefore, a load from the rack 54 can be dispersed to the main small gear 40 and the sub small gear 46, and even when diameters of the main small gear 40 and the sub small gear 46 are reduced, strength of the main small gear 40 and the sub small gear 46 to the load from the rack 54 can be secured and a movement stroke of the rack 54 can be reduced. |
