| 摘要 |
A drive device includes: a cam; a clutch installed on a same shaft with the cam, and for connecting/disconnecting rotational force from a power source to the cam through the shaft according to rotation of a clutch collar; an actuator including a claw part; and a control mechanism for controlling a position of the claw part of the actuator, wherein a projection part includes a first projection part and a second projection part provided at asymmetric positions on a periphery of the clutch collar, and an angle A and an angle B satisfy the angle A<the angle B, where a central angle from the first projection part to the second projection part in the rotating direction is the angle A, and a central angle from the second projection part to the first projection part in the rotating direction is the angle B. |
| 主权项 |
1. A drive device comprising:
a cam; a clutch installed on a same shaft with the cam, and for connecting/disconnecting rotational force from a power source to the cam through the shaft according to rotation of a clutch collar; an actuator including a claw part; and a control mechanism for controlling a position of the claw part of the actuator, wherein the control mechanism controls the position of the claw part such that a distance L becomes a first distance with which the claw part is able to abut on a projection part provided on the clutch collar, or a second distance with which the claw part is able to be separated from the projection part of the clutch collar, where a distance from the claw part to a surface of the clutch collar of the clutch is the distance L, the clutch transmits the rotational force to the cam by rotation of the clutch collar according to the rotational force in a state where the claw part is separated from the projection part, and cuts off the transmission to the cam by stopping of the rotation by the clutch collar in a state where the claw part abuts on the projection part, the projection part includes a first projection part and a second projection part provided at asymmetric positions on a periphery of the clutch collar, the periphery being of a rotating direction of the rotating force, an angle A and an angle B satisfy the angle A<the angle B, where a position where the claw part abuts on the first projection part is an initial position in a drive operation of the cam, a central angle from the first projection part to the second projection part in the rotating direction of the rotational force is the angle A, and a central angle from the second projection part to the first projection part in the rotating direction of the rotational force is the angle B, and the control mechanism executes initial control in which the position of the claw part is caused to be a position where the distance L becomes the second distance during a time T1 in which the clutch collar is rotated by an angle larger than the angle A and smaller than the angle B by the rotational force, and the position of the claw part is caused to be a position where the distance L becomes the first distance after passage of the time T1, at a time of starting the drive operation, in order to cause the cam to come to the initial position. |
