| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a key which is improved in shape precision by preventing a molding of the key from being strained, and a metal mold for key molding for molding the same. <P>SOLUTION: The key 10 which has a recess on its reverse surface is formed by extending sidewall portions 15 and 16 and a front wall portion 11a downward from peripheral edges of a top surface portion 14 whose top surface 14b is made smooth. The sidewall portions 15 and 16 are tilted so that lower-end sides are positioned outside upper-end portions, and tilt angles of internal surfaces 15a and 16a of the sidewall portions 15 and 16 to a vertical direction are made smaller than tilt angles of external surfaces 15b and 16b of the sidewall portions 15 and 16. <P>COPYRIGHT: (C)2010,JPO&INPIT |
