Abstract: A vehicle seat includes a back frame connected to a base member so as to be able to rotate around a first rotation shaft; a rotation locking mechanism; a cushion frame connected to the back frame so as to be able to rotate around a second rotation shaft, and in which a long hole is formed; a link member connected to the base member so as to be able to rotate around a third rotation shaft; a fourth rotation shaft fixed to the link member and inserted in the long hole so as to be able to move relatively and so as to be able to rotate; and movement restricting portion provided between the fourth rotation shaft and an inner surface of the long hole, and that restricts movement of the fourth rotation shaft from one end portion of the long hole toward another end portion side.

Abstract: A vehicle seat includes a back frame connected to a base member so as to be able to rotate around a first rotation shaft; a rotation locking mechanism; a cushion frame connected to the back frame so as to be able to rotate around a second rotation shaft, and in which a long hole is formed; a link member connected to the base member so as to be able to rotate around a third rotation shaft; a fourth rotation shaft fixed to the link member and inserted in the long hole so as to be able to move relatively and so as to be able to rotate; and movement restricting portion provided between the fourth rotation shaft and an inner surface of the long hole, and that restricts movement of the fourth rotation shaft from one end portion of the long hole toward another end portion side.

Abstract: The present invention relates to a range switching device for performing range switching of an automatic transmission by using an actuator that is electrically controlled to be driven, and to a switching method thereof. A range switching device of an automatic transmission that can reduce collision noise occurring from a detent mechanism and a switching method thereof are provided. The automatic transmission includes a detent mechanism that presses a roller against a groove by using a spring, moves the roller between grooves, and determines a range position of the transmission, and a range of the transmission is changed by driving the detent mechanism by the actuator. In changing a range position of the transmission, the actuator is braked in accordance with a drawing force of the spring into a groove so that energy of the velocity when the roller reaches a target stop position can be controlled to approach zero.

Abstract: A device for switching an automatic transmission range includes an actuator, a detent mechanism driven by the actuator and engageable with concave portions, and a control unit. The control unit sets first and second positions of the detent mechanism as first and second target values for positions corresponding to first and second transmission ranges. The first position is detected when the detent mechanism is driven to a limit position, is driven by a first predetermined amount, moves toward a valley of a first concave portion without being driven by the actuator, and then stops naturally. The second position is detected when the detent mechanism is driven by a second predetermined amount to move away from the first target value, move toward a valley of a second concave portion without being driven by the actuator, and then stop naturally.

Abstract: A device for switching an automatic transmission range includes an actuator, a detent mechanism driven by the actuator and engageable with concave portions, and a control unit. The control unit sets first and second positions of the detent mechanism as first and second target values for positions corresponding to first and second transmission ranges. The first position is detected when the detent mechanism is driven to a limit position, is driven by a first predetermined amount, moves toward a valley of a first concave portion without being driven by the actuator, and then stops naturally. The second position is detected when the detent mechanism is driven by a second predetermined amount to move away from the first target value, move toward a valley of a second concave portion without being driven by the actuator, and then stop naturally.

Abstract: The present invention relates to a range switching device for performing range switching of an automatic transmission by using an actuator that is electrically controlled to be driven, and to a switching method thereof. A range switching device of an automatic transmission that can reduce collision noise occurring from a detent mechanism and a switching method thereof are provided. The automatic transmission includes a detent mechanism that presses a roller against a groove by using a spring, moves the roller between grooves, and determines a range position of the transmission, and a range of the transmission is changed by driving the detent mechanism by the actuator. In changing a range position of the transmission, the actuator is braked in accordance with a drawing force of the spring into a groove so that energy of the velocity when the roller reaches a target stop position can be controlled to approach zero.

Abstract: The position of a detent lever, which is detected when the detent lever is driven by a predetermined angle of ?1 from a state in which the detent lever is in contact with a stopper so as to move away from a stopper, and the detent lever moves toward the valley of a concave portion corresponding to a P range from the one wall of concave portion away from the stopper, and naturally stops, is set as a first learning value, subsequently, the position of the detent lever, which is detected when the detent lever is driven by a predetermined angle of ?2 so as to move away from the stopper, and the detent lever moves toward the valley of the concave portion from the one wall of concave portion close to the stopper, and naturally stops, is set as a second learning value, and a value acquired by averaging the first and the second learning values, is set as a target value for a position corresponding to a transmission range.