The description relates to devices that include hinged portions and controlling rotation of the portions. One example can include a display that is configured to rotate relative to an axis. The example can also include a clutch assembly interposed between first and second planet gear assemblies positioned along the axis. The first and second planet gears configured to multiply resistance to rotation around the axis that is supplied by the clutch assembly.

The description relates to devices that include hinged portions and controlling rotation of the portions. One example can include a display that is configured to rotate relative to an axis. The example can also include a clutch assembly interposed between first and second planet gear assemblies positioned along the axis. The first and second planet gears configured to multiply resistance to rotation around the axis that is supplied by the clutch assembly.

In some implementations, the device may include a first member having a locking structure and a second member having a receiving area. The device may include a locking element supported in the receiving area of the second member, the locking element moving between an engaged position where the locking element holds or transfers torque between the first and second members and a disengaged position where the locking element holds or transfers no torque between the first and second members. The locking element includes a socket. Moreover, the device may include a reciprocating member in the socket when the locking element is in the disengaged position.

A control device for a power transmission mechanism includes a controller. The power transmission mechanism includes an engagement mechanism and an operation mechanism including a movable member and a guide member. The guide member includes a plurality of guide areas being configured to move relative to the movable member to guide the movable member to an engaging position or to a disengaging position. The controller is configured to switch, when determining that a predetermined condition related to traveling of the vehicle is satisfied, a contact guide area that is in contact with the movable member to guide the movable member to the engaging position or to the disengaging position, from a first guide area to a second guide area that are included in the plurality of guide areas.

A control device for a power transmission mechanism includes a controller. The power transmission mechanism includes an engagement mechanism and an operation mechanism including a movable member and a guide member. The guide member includes a plurality of guide areas being configured to move relative to the movable member to guide the movable member to an engaging position or to a disengaging position. The controller is configured to switch, when determining that a predetermined condition related to traveling of the vehicle is satisfied, a contact guide area that is in contact with the movable member to guide the movable member to the engaging position or to the disengaging position, from a first guide area to a second guide area that are included in the plurality of guide areas.

A clutch actuator assembly includes a drive member, a threaded rod including a first end operatively connected to the drive member, a second end, and an intermediate portion including a plurality of threads extending therebetween. A member is threadably engaged with the plurality of threads of the threaded rod, a clutch actuator member is arranged at the second end of the threaded rod, and a velocity brake is operatively coupled to the threaded rod. The velocity brake decelerates rotation of the threaded rod.

A clutch actuator assembly includes a drive member, a threaded rod including a first end operatively connected to the drive member, a second end, and an intermediate portion including a plurality of threads extending therebetween. A member is threadably engaged with the plurality of threads of the threaded rod, a clutch actuator member is arranged at the second end of the threaded rod, and a velocity brake is operatively coupled to the threaded rod. The velocity brake decelerates rotation of the threaded rod.

A clutch assembly for a lock includes a driver (1), having a driver shaft (9); a coupler (3); and a follower (2). The driver (1), the coupler (3) and the driver shaft (9) are configured to rotate concentrically together. The coupler (3) is configured to move along the central axis of the driver shaft (9) to couple to or decouple from the follower (2). The driver (1) and the follower (2) are configured to rotate concentrically together when the coupler (3) is engaged to the follower (2), and wherein the driver (1) and the follower (2) are configured to rotate independently when the coupler (3) is disengaged from the follower (2).

A clutch for selectively preventing rotation of a rotating component may include a first and second pawls pivotable between engagement and disengagement with the rotating component to selectively prevent or allow rotation of the rotating component in one or both directions. An armature moveable between a first and second armature positions may have a common member pivotally connected thereto and engaging the first and second pawls, with a torque spring biasing the common member to rotate toward the first pawl and away from the second pawl. In an intermediate armature position, the common member may disengage the first pawl from the rotating component while engaging the second pawl to allow rotation in one direction while preventing rotation in the opposite direction. In embodiments, a clutch may include a cam actuator rotating to selectively control engagement of the pawls with the rotating component and locking in one or both directions.

A clutch for selectively preventing rotation of a rotating component may include a first and second pawls pivotable between engagement and disengagement with the rotating component to selectively prevent or allow rotation of the rotating component in one or both directions. An armature moveable between a first and second armature positions may have a common member pivotally connected thereto and engaging the first and second pawls, with a torque spring biasing the common member to rotate toward the first pawl and away from the second pawl. In an intermediate armature position, the common member may disengage the first pawl from the rotating component while engaging the second pawl to allow rotation in one direction while preventing rotation in the opposite direction. In embodiments, a clutch may include a cam actuator rotating to selectively control engagement of the pawls with the rotating component and locking in one or both directions.