CYLINDER LOCK AND DOOR

To provide a cylinder lock capable of preventing a driver pin from falling down in the inside of a pin hole even when the driver pin is made shorter.SOLUTION: A cylinder lock has an external cylinder and an internal cylinder that rotatably engages with the external cylinder. A hole part in communication with a keyhole is formed on the external cylinder and the internal cylinder so as to allow a driver pin to be inserted therethrough. Diameter of the driver pin on the external cylinder side is larger than diameter of the driver pin on the internal cylinder side. It is preferable that a posture keeping area having a predetermined length in an axial direction and a fixed diameter be provided on an end of the driver pin on the external cylinder side.SELECTED DRAWING: Figure 6 【課題】ドライバーピンを短くした場合であってもピン孔内部でのドライバーピンの転倒を防止できるシリンダ錠を提供すること。【解決手段】外筒と、外筒に回動可能に篏合する内筒と、を備え、外筒及び内筒には、鍵穴に連通しドライバーピンが挿通可能な孔部が形成され、ドライバーピンの外筒側の径は、ドライバーピンの内筒側の径よりも大きい、シリンダ錠。ドライバーピンの外筒側の端部には、軸方向に所定の長さで一定の径を有する姿勢保持領域が設けられることが好ましい。【選択図】図６