Patent ID: 7523998

Claim:
A quick release device for a bicycle, the bicycle including left and right fork blades spaced apart from each other along a hub axis, and a hub assembly rotatable about the hub axis, said quick release device comprising: a tightening bar including an enlarged head which is adapted to be outboard of the right fork blade, a shank body which extends from said enlarged head, and which is movable relative to the hub assembly along the hub axis, and an actuated end which is connected to said shank body opposite to said enlarged head, which has a cam follower surface, and which is adapted to be outboard of the left fork blade; a cam member having front and rear ends opposite to each other along a rotating axis transverse to the hub axis, and a cam segment, which is interposed between said front and rear ends, which is rotatable about the rotating axis, and which is configured to engage said cam follower surface such that when said cam segment is rotated about the rotating axis, said actuated end is moved between a tightening position, where said actuated end is remote from the left fork blade, and a loosening position, where said actuated end is closer to the left fork blade; a cover including front and rear walls which are spaced apart from each other along the rotating axis to define an accommodation space therebetween for receiving said actuated end and said cam segment, and which have an access bore and an access hole, respectively, said access bore and said access hole being communicated with said accommodation space such that said front and rear ends extend respectively and outwardly of said access bore and said access hole; and a lever including a handle portion having proximate and distal ends opposite to each other along a lengthwise direction, and front and rear lug portions extending from said proximate end away from said distal end, said front and rear lug portions being spaced apart from each other along the rotating axis to respectively flank said front and rear walls of said cover, and being coupled respectively with said front and rear ends of said cam member to enable said cam segment to be rotated by a turning movement of said distal end about the rotating axis, said rear lug portion having an insert hole said rear end including a spindle segment and a stud which has inner and outer tubular surfaces that are opposite to each other in radial directions relative to the rotating axis, said inner and outer tubular surfaces being configured to be in splined engagement with said spindle segment and said insert hole, respectively.