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Title:
KEY
Document Type and Number:
Japanese Patent JP2009243224
Kind Code:
A
Abstract:

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.


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Inventors:
KONOSE MASAAKI
TANAKA TAKUYA
Application Number:
JP2008093286A
Publication Date:
October 22, 2009
Filing Date:
March 31, 2008
Export Citation:
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Assignee:
MIWA LOCK KK
International Classes:
E05B19/06; E05B29/00
Domestic Patent References:
JPH09144398A1997-06-03
JPH09144398A1997-06-03
Attorney, Agent or Firm:
Takeo Iida