| 摘要 |
[PROBLEMS] To keep a determined phase angle without consuming power once the phase angle is determined. [MEANS FOR SOLVING PROBLEMS] An outer cylinder part (10) is connected with an intermediate member (14). The intermediate member (14) is connected with an inner cylinder part (12) via a pin (74). Rotary drums (84, 86) are arranged on both sides of a roller (76) mounted to the intermediate member (14). When the rotation of one rotary drum transmits the rotating force of the one rotary drum to the other rotary drum via the intermediate member (14) and the roller (76), the one rotary drum moves to the side of the other rotary drum, and the pin (74) moves along the guide grooves (48, 50) of the inner cylinder part (12) to rotate the inner cylinder part (12) and the outer cylinder part (10) in directions opposite to each other along the circumferential direction. The intermediate member (14) moves along the axial direction of the inner cylinder part (12) with the movement of the pin (74) and is positioned at the position where the rotation of the rotary drums (84, 86) is stopped. Since the roller (76) does not rotate by torque inputted from the outer cylinder part (10) or a camshaft (2) at that time, the intermediate member (14) is brought into a self-locking state.
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