| 摘要 |
A cylinder mechanism (11) manipulates a lever (7) that is biased in an engagement direction to engage an engagement member (6) with the clutch plate (3). The cylinder mechanism (11) includes a piston (17) that is movable toward and away from the lever (7); a spring (20) that biases a pressing member of the piston (17) toward a reference position; and movement means (27) for moving the piston (17) from the reference position toward the lever (7). The cylinder mechanism (11) further includes regulating means (41, 42) for preventing the piston (17) from moving further toward the lever (7) from the position nearest to the lever (7) within the normal movement range of the piston (17).
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