| 摘要 |
A measuring tool has a slider ( 3 ) supported to a body frame ( 1 ) and a feeding mechanism ( 4 ) for moving the slider in axial direction. The feeding mechanism includes: an outer roller ( 41 ) rotatably supported to the body frame ( 1 ); a forward feed roller ( 42 ) disposed between the outer roller ( 41 ) and the slider ( 3 ) at a position closer to a forward side of the slider ( 3 ) relative to the outer roller ( 41 ); a reverse feed roller ( 43 ) disposed at a position on a reverse side; a roller holder ( 45 ) supporting these feed rollers to allow them to move along the circumference around the axis of the outer roller; a first leaf spring ( 44 ) that biases these feed rollers toward the slider side; and a power transmitter ( 46 ) connecting the outer roller ( 41 ) to these feed rollers to transmit the rotation of the outer roller to the feed rollers.
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