Patent ID: 7963133

Claim:
A cylinder lock, comprising: a sleeve; a key plug arranged in the sleeve and having a key insert hole opening on a face of a key insert side; a key matching tumbler member movably supported on the key plug, detachably engaged to the sleeve and withdrawn from engagement with the sleeve by an insertion of a matching key into the key insert hole; and a clutch arranged on an opposite side of the key insert side of the sleeve for transmitting an unlocking movement of an operating handle to a locking mechanism, wherein the clutch has an input clutch element moved by the unlocking movement of the operating handle, and an output clutch element moved by the input clutch element, and the output clutch element is detachably coupled with the sleeve, and the input clutch element is detachably coupled with the sleeve and wherein the input clutch element withdraws the output clutch element in the sleeve in an axial direction as a result of a pivotal movement caused by the unlocking movement of the operating handle when the key matching tumbler member is in a locking state.