| 摘要 |
<P>PROBLEM TO BE SOLVED: To block complete insertion of a key with an insufficiently deep blocking groove by a pair of blocking tumbler pins. <P>SOLUTION: The security reversible key with an assigned cylinder Z has a blocking groove BN with a coded blocking depth (B1, B2, B3), which runs parallel to the axis (x) of the key from the tip of the key to at least the first position (P1) of a row (A2) of tumbler pins on the key. In the assigned cylinder, at least at the rearmost coding position (P1), a pair of tumbler pins corresponding to the blocking groove BN with a blocking tumbler pin BZ and an extended blocking counter pin BG are provided, whereby the blocking counter pin BG impinges on the cylinder housing (10), when the blocking groove is insufficiently deep. <P>COPYRIGHT: (C)2009,JPO&INPIT |
