| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving device capable of setting a position of a driven member to a position where a driving start position is set by an easier structure.SOLUTION: This invention comprises a clutch coaxially mounted with a cam for connecting or disconnecting a rotational force from a driving source with or from the cam in response to a rotation of a clutch collar 204G, and an actuator having claws. The clutch collar 204G is provided with a salient 204E and a salient 204F at their non-symmetrical positions. When a central angle ranging from the salient 204E toward the salient 204F is defined as an angle A and a central angle ranging from the salient 204F to the salient 204F is defined as an angle B, the angle A and the angle B satisfy a relation A<B. When the driving operation is started, the claws are released from the clutch collar during a time in which the clutch collar is rotated by an amount larger than the angle A and smaller than the angle B and after that, the claws are approached to the clutch collar. |
