A clutch mechanism for coupling and uncoupling an electric motor and leadscrew has dog-clutch gears that can be engaged by a linear actuator, bell crank, and linkage shaft. Uncoupling force due to narrowed dog teeth are resisted by the alignment of the linkage shaft with the central portion of the bell crank.

A deck system includes a baluster actuator device that moves balusters from an open position to a closed position. The movable balusters are positioned in the open position to at least partially open the baluster gaps between the stationary balusters, and the movable balusters are positioned in the closed position to close the baluster gaps between the stationary balusters. The balusters further include one or more functional modules secured to module inserts defined in the balusters.

A deck system includes a baluster actuator device that moves balusters from an open position to a closed position. The movable balusters are positioned in the open position to at least partially open the baluster gaps between the stationary balusters, and the movable balusters are positioned in the closed position to close the baluster gaps between the stationary balusters. The balusters further include one or more functional modules secured to module inserts defined in the balusters.

A double sliding-plug door system includes a fixed frame, a sliding-plug rail arranged in the fixed frame, a cross beam, a driving mechanism, a linkage mechanism, a guide locking piece and a limiting mechanism. The driving mechanism has a screw rod and a motor driven nut assembly having a transmission frame, a nut sleeved in the screw rod and a follow-up member fixed in the nut; the nut mounted in the transmission frame, which itself is connected with an active sleeve assembly; the screw rod drives the nut assembly to reciprocate axially along the screw rod.

A double sliding-plug door system includes a fixed frame, a sliding-plug rail arranged in the fixed frame, a cross beam, a driving mechanism, a linkage mechanism, a guide locking piece and a limiting mechanism. The driving mechanism has a screw rod and a motor driven nut assembly having a transmission frame, a nut sleeved in the screw rod and a follow-up member fixed in the nut; the nut mounted in the transmission frame, which itself is connected with an active sleeve assembly; the screw rod drives the nut assembly to reciprocate axially along the screw rod.

A clutch mechanism for coupling and uncoupling an electric motor and leadscrew has dog-clutch gears that can be engaged by a linear actuator, bell crank, and linkage shaft. Uncoupling force due to narrowed dog teeth are resisted by the alignment of the linkage shaft with the central portion of the bell crank.

A clutch mechanism for coupling and uncoupling an electric motor and leadscrew has dog-clutch gears that can be engaged by a linear actuator, bell crank, and linkage shaft. Uncoupling force due to narrowed dog teeth are resisted by the alignment of the linkage shaft with the central portion of the bell crank.

A telescopically extendable truck bed shell including a shield assembly, a transmission assembly. The shield assembly includes shields telescopically connected together. The shields are configured to be mounted on top of a truck bed and attached at side rails. The transmission assembly includes a motor which drives motion to a threaded rod that is internally connected to the shields by means of bearing units and transmission gears. The motor is electrically powered and remotely controlled to permit a user to retract or extend the shields wirelessly. When contracted, the shields permit a user to easily retrieve items inside the truck bed.

A telescopically extendable truck bed shell including a shield assembly, a transmission assembly. The shield assembly includes shields telescopically connected together. The shields are configured to be mounted on top of a truck bed and attached at side rails. The transmission assembly includes a motor which drives motion to a threaded rod that is internally connected to the shields by means of bearing units and transmission gears. The motor is electrically powered and remotely controlled to permit a user to retract or extend the shields wirelessly. When contracted, the shields permit a user to easily retrieve items inside the truck bed.

A locking device includes a cam that is formed in a rotating unit configured to rotate about a rotational center axis that is parallel to an opening width direction of a door, and the cam permits or prohibits movement of a door leaf in the opening width direction in accordance with a rotational position of the rotating unit.