| 摘要 |
PROBLEM TO BE SOLVED: To easily insert a key for cylinder lock (key main body) into a cylinder lock (cylinder lock main body), even if inserting a tip of a rod-shaped shaft portion of a handle into a key hole at a rough angle by gripping a grip portion of the handle in a simple constitution and such a rational constitution as utilizing the rod-shaped shaft portion of the handle.SOLUTION: In a cylinder lock, a tumbler located on an axial right-angle cross section which is orthogonal to a rotation axis of an inner cylinder coincides with a key code formed at a blade, when inserting the blade of a key main body into a key hole of the inner cylinder of a lock main body. The key main body is constituted of: a grip portion; a shaft portion which protrudes from the grip portion in a rod shape; and the cylindrical blade which is rotatably and externally fitted to the shaft portion. An external peripheral shape of the blade is formed into either a circular shape or a polygonal shape of three-rotation symmetry or larger depending on a shape of an internal peripheral face of the key hole. When completely inserting the key main body into the key hole of the lock main body, a rotational force of the key main body is transmitted to the inner cylinder via engagement means arranged at the inner cylinder and the key main body.SELECTED DRAWING: Figure 4 |
