BACKLASH REMOVING GEAR STRUCTURE

摘要

PROBLEM TO BE SOLVED: To exert a twist force, by which a backlash is removed, on a gap between two gears in a way that two gears of which a scissors gear consists are not separated away from each other and an inclination does not occur and to apply it for a gear having a low gear diameter. SOLUTION: A backlash removing gear structure comprises a shaft member 32A; a first gear 32B pivotally supported on the shaft member 32A and rotated integrally with the shaft member 32A; a second gear 61 being a gear having the same module and the same number of teeth as those of the first gear 32B and pivotally supported on the shaft member 32A adjacently to the first gear 32B and effecting relative rotation with the shaft member 32A; and a spring 62 for removing a backlash located between the shaft member 32A side and the second gear 61 side. The spring 62 has a function as a twist spring to apply a twist on a second gear 62 from the shaft member 32A side as well as a function as a compression spring to energize the second gear 61 on the first gear 32B.