Abstract: The clutch assembly includes a controlling lever, a push bar, a locking shaft, a guiding sleeve, a driving sleeve, and a restoring spring member. The locking shaft has several locking protrusions and several guiding protrusions formed thereon. The push bar is driven by the control lever to push the locking shaft axially move along a rotation axis, and the guiding protrusions therefore engage with the driving sleeve. The driving sleeve is driven to rotate for making the locking protrusions aligned with the locking grooves. The restoring spring member bounds and pushes the locking shaft to an engaging position while the locking protrusions are received in the locking grooves. Thus, the clutch assembly is easily switched from a disengagement status to an engagement status.

Abstract: The clutch assembly includes a controlling lever, a push bar, a locking shaft, a guiding sleeve, a driving sleeve, and a restoring spring member. The locking shaft has several locking protrusions and several guiding protrusions formed thereon. The push bar is driven by the control lever to push the locking shaft axially move along a rotation axis, and the guiding protrusions therefore engage with the driving sleeve. The driving sleeve is driven to rotate for making the locking protrusions aligned with the locking grooves. The restoring spring member bounds and pushes the locking shaft to an engaging position while the locking protrusions are received in the locking grooves. Thus, the clutch assembly is easily switched from a disengagement status to an engagement status.

Abstract: A driving apparatus for fine-tuning focus is provided, including a movable structure suspended inside an outer holder by a suspension set. The suspension set is connected to the movable structure and the outer holder respectively so that the movable structure is suspended inside the outer holder, and can move inside the outer holder. With a magnet force generated by the interaction of the magnetic field of said first magnet set and said second magnet set of said outer holder, and the electrical current in said first coils and said second coils of said movable structure, the magnet force is able to drive the movable structure upward and downward to adjust the focus.