Patent ID: 8602191

Claim:
A clutch assembly for mounting in an electronic apparatus, the electronic apparatus having a base body, the clutch assembly comprising: a control lever for being pivotally coupled to the base body; a push bar having a first end mechanically coupled with the control lever and a cup at an opposing second end thereof, the cup having a T-shaped stopper formed thereon, the control lever configured for driving the push bar to axially move along a rotation axis; a locking shaft aligned with the push bar, the locking shaft comprising: a shaft having a first end and an opposing second end, the second end engagingly received in the cup; a plurality of parallel elongated locking protrusions formed on the shaft at the second end, each of the locking protrusions having a first slanted end face; and a plurality of parallel elongated guiding protrusions formed on the shaft at the first end, each of the guiding protrusions having a cusp end; a guiding sleeve immovable along the rotation axis and rotatable around the rotation axis, the guiding sleeve comprising: a plurality of spaced U-shaped blocking protrusions formed on an internal sidewall of the guiding sleeve, each of the blocking protrusions having two legs and a locking groove formed between the two legs; and a plurality of releasing channels each formed between each two adjacent blocking protrusions, at least one of the two legs having a second slanted end face matching with the first slanted end faces for directing the corresponding locking protrusion to move into the corresponding locking groove or to move into the corresponding releasing channel; a driving sleeve arranged along the rotation axis and configured for being driven to rotate around the rotation axis, the driving sleeve comprising: a plurality of spaced retaining protrusions formed on an internal side wall thereof, each of retaining protrusions having a tip end with opposite slanted end faces facing toward the locking shaft; and a plurality of engaging channels each formed between each two adjacent retaining protrusions; and a restoring spring member having a first end for being fixed to the base body and an opposing second end fixed to the first end of the locking shaft, the spring member configured for applying a pushing force to the locking shaft, the locking shaft being rotatable about the rotating axis for alternately switching between an engaging position where the locking protrusions are lockingly engaged in the corresponding locking grooves, and a disengaging position where the locking protrusions are slidably received in the corresponding releasing channels.