| 摘要 |
PROBLEM TO BE SOLVED: To provide a lid body opening/closing device which can be downsized even when a potentiometer gear is engaged with a gear at the adjacent position of a rotation axis in a configuration in which a coil spring is arranged on the outer peripheral side of the rotation axis so as to assist the opening operation of a lid body with energizing force of the coil spring.SOLUTION: An output axis 2 includes a gear part 31 and an axis part 32 projecting from the gear part 31. An assist spring (coil spring) 28 is coaxially arranged on the outer peripheral side of the axis part 32. A fourth composite gear 39 of a deceleration gear train 26 transmitting driving force to the output axis 2 is arranged adjacently to the output axis 2. The fourth composite gear 39 includes a fourth small diameter gear part 39b engaged with the gear part 31 and a detection gear part 39c having a diameter smaller than the fourth small diameter gear part 39b. The detection gear part 39c is positioned at the side of the assist spring 28. The detection gear part 39c is engaged with a potentiometer gear 40. |
