| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electronic key type lock device capable of releasing a lock by a mechanical key and capable of avoiding becoming impossible to extract/remove the mechanical key. SOLUTION: When a lock cannot be released by an electronic key 20 due to a flat battery, a mechanical key is inserted into a key cylinder 1 to release engagement of a tumbler 6 and a sleeve 4 to release the lock by rotating the key cylinder 1. The sleeve 4 rotates together with the key cylinder 1 when using a immobile key as the mechanical key, in the case where dislocation is caused in the rotational direction from the key cylinder 1 in key returning operation, the sleeve 4 is returned to a former position by a sleeve returning means 30 to avoid becoming impossible to extract/remove the immobile key.</p> |
