State-changing element operating device, range changing device for automatic transmission, and parking apparatus

An operating device for a state-changing element whose state changes by being mechanically displaced, comprising:

• a detent mechanism for displacing and positioning a displacement member included in the state-changing element,
• an actuator for driving the detent mechanism,
• an output angle detection means detecting a rotation angle of an output shaft of the actuator, and
• a control unit that controls the actuator,
• the detent mechanism including a detent member that displaces the displacement member by being tilted by the actuator, and a positioning member that maintains a resting position of the detent member,
• the actuator including an electric motor that generates rotational power, the output shaft that is coupled coaxially with a spindle of the detent member and so as to be capable of integral rotation, and a deceleration mechanism that decelerates the rotational power generated by the electric motor, and outputs the decelerated rotational power from the output shaft,
• the control unit including an initial motion means that, in a case of receiving a request to change the state of the state-changing element and changing the position of the detent member, reduces play in the rotation direction that exists in a coupling portion between the spindle and the output shaft from after driving of the electric motor until the output shaft rotates, and
• a management means that, when it has been determined that the play has been reduced at a time of detecting the start of rotation of the output shaft by the output angle detection means, sets a value obtained by tacking on play in the rotation direction that exists in a coupling portion between the spindle and the output shaft to a spindle rotation angle necessary for a position change of the detent member corresponding to the request, as a target rotation angle of the electric motor after it has been determined that the play has been reduced.