| 摘要 |
<p>A lock head, specially a lock head with secondary key, comprises a lock body (1), a lock core (2,2b), inner pins (10) with cuts (11), an identification code sheet (13), and a lock core pin (38) or an engaging and disengaging bolt (5). When the lock core (2,2b) is rotated, the inner pins (10) are located in the lock core (2,2b). When a correct key (33) is inserted, the identification code sheet (13) is aligned with the cuts (11) of the inner pins (10). The identification code sheet (13) is an axially normally open identification code sheet. The arrangement of parts of the lock head is reasonable, and reliability and whole strength of the lock head are increased.</p> |
