Patent ID: 8408094

Claim:
A quick release device comprising: a crank having a first hole defined in one end thereof and a second hole opened on one lateral side thereof, the second hole communicating with the first hole, the crank further having a sixth hole opened on another lateral side thereof, the sixth hole communicating with the first hole and having a threaded structure defined therein, a first engaging rod provided for inserted into the second hole; a fixing sleeve received in the first hole of the crank, a first groove defined on the outside periphery of the fixing sleeve, a third hole opened at one end of the fixing sleeve, a rubber ring mounted in the third hole, a fourth hole opened on the outside periphery of the fixing sleeve therethrough and corresponding to the sixth hole, the fourth hole communicating with the third hole, the first engaging rod inserted into the second hole and engaging with the first groove of the fixing sleeve so that the fixing sleeve is positioned in the first hole; and a quick release assembly partially received in the sixth hole, the quick release assembly further comprising: a second engaging rod received in the sixth hole, the second engaging rod having a head formed at one end thereof and a first threaded portion formed thereon, the cross-section of the head being greater than the cross-section of the second engaging rod; a fixing member having a eighth hole opened therethrough, the eighth hole having the threaded structure defined therein, the fixing member further having a second threaded portion formed at one end thereof; and a rotating button connected to the second engaging rod and being not rotated relative to the second engaging rod.