Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for switching a secondary cell to a primary cell. A user equipment (UE) monitors a first radio condition of the UE for beams of a primary cell and a second radio condition for beams of one or more secondary cells configured for the UE in carrier aggregation. The UE transmits a request to configure a candidate beam of at least one candidate secondary cell as a new primary cell in response to the first radio condition not satisfying a first threshold and the second radio condition for the at least one candidate secondary cell satisfying a second threshold. A base station determines to reconfigure at least one secondary cell as the new primary cell. The base station and the UE perform a handover of the UE to the new primary cell.

Abstract: A device for lifting and tightening screws includes a transporting unit to move the device to a screw suction position or a screw locking position, a suction nozzle unit, a vacuum generator, and an electronic screwdriver unit. When the device is moved to a position to attract and apply suction to a screw, the suction nozzle unit captures a screw. When the device is moved to the screw locking position, the electronic screwdriver unit tightens the screw. The device prevents the suction nozzle from contacting the workpiece, guides a suction position of the screw, and can function in relation to screw holes surrounded by steps and barriers.

Abstract: A device to present screws of different sizes and characteristics for insertion and fastening in manufacturing processes includes an aligning module and a dispensing module. The aligning module includes a track with two supporting plates. One end of each supporting plate is chamfered and the two supporting plates are spaced to form a first receiving space and a second receiving space for receiving the screws, a screening module functions to brush away screws which do not fall correctly into place on the track. The dispensing module includes a circular member with notches to receive screws transported by the track.

Abstract: A device to present screws of different sizes and characteristics for insertion and fastening in manufacturing processes includes an aligning module and a dispensing module. The aligning module includes a track with two supporting plates. One end of each supporting plate is chamfered and the two supporting plates are spaced to form a first receiving space and a second receiving space for receiving the screws, a screening module functions to brush away screws which do not fall correctly into place on the track. The dispensing module includes a circular member with notches to receive screws transported by the track.

Abstract: A device for lifting and tightening screws includes a transporting unit to move the device to a screw suction position or a screw locking position, a suction nozzle unit, a vacuum generator, and an electronic screwdriver unit. When the device is moved to a position to attract and apply suction to a screw, the suction nozzle unit captures a screw. When the device is moved to the screw locking position, the electronic screwdriver unit tightens the screw. The device prevents the suction nozzle from contacting the workpiece, guides a suction position of the screw, and can function in relation to screw holes surrounded by steps and barriers.