To provide a key for a cylinder lock, which can be smoothly pulled out from a keyhole.
Each dent 7 is composed of two-tier cone-shaped portions, that is, an inside cone-shaped portion 11 ranging from its bottom surface to a predetermined height, and an outside cone-shaped portion 12 which is provided in such a manner as to continue into the inside cone-shaped portion and opened in a surface of a body portion. An opening angle of the inside cone-shaped portion is set larger by 10-odd degrees than an angle of 90 degrees, so that the inclination of the slope of the inside cone-shaped portion can become gentle; and an opening angle of the outside cone-shaped portion is set smaller than that of the inside cone-shaped portion, so that the size of the opening of the body portion surface of the outside cone-shaped portion can be set almost equal to that of a conventional opening.
JP2005016277 | PICKING PREVENTIVE KEY |
TANAKA TAKUYA
JPH09144398A | 1997-06-03 | |||
JPH09144398A | 1997-06-03 |
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