| 摘要 |
<p>A battery-less electronic cylinder lock comprises an electromagnet (14) or other electrical release mechanism controlled by an electronic circuit (15). A cooperating key comprises a battery (20) and a code producing circuit (21). When the key is inserted in the lock, power for the lock is supplied from the battery (20) to the electronic circuit (15) and the electromagnet (14) by means of a transformer coupling arrangement (16, 17, 22, 23) with a primary portion (22, 23) in the key and a secondary portion (16, 17) in the lock. Alternatively, power may be supplied via electrical contacts (50, 52) on the key and on the lock. <IMAGE></p> |
