Patent ID: 7673947

Claim:
A quick release device comprising: an operation member composed of a cam portion and a lever connected to the cam portion; a cooperation unit which includes a pad with a curved and concaved recess with which the cam portion is pivotally engaged; a rod having a first threaded section at a first end thereof and the first threaded section extending through the cooperation unit and into the cam portion and is threadedly connected with a pin which transversely and eccentrically extends through the cam portion, a second end of the rod including a second threaded section which extends through a biasing unit and is connected with an adjustment member in the biasing unit, the biasing unit longitudinally pulling the rod away from the operation member, the biasing unit including a tubular case which includes a passage centrally and longitudinally defined therethrough, the contact member engaged with a first end of the case and a spring mounted to the rod and received in the passage, the adjustment member including an outer periphery which is complementary to the passage and a threaded hole centrally defined through the adjustment member, the adjustment member slidably received in the passage and the threaded section of the rod threadedly extending through the threaded hole such that adjustment member is rotated with the case and moves along the threaded section of the rod to compress the spring when rotating the case, the spring being in contact between the contact member and the adjustment member.