| 摘要 |
The locking mechanism described herein is for use in an enclosure, which is part of a product delivery system. The locking mechanism uses existing locks and latches, and configures them using linkages into a mechanism that is not currently available. The mechanism has a latch that holds the door of the enclosure closed. This latch stays in a normally unlocked state until deliberate acts are taken to lock the latch. When a delivery is made, the delivery person opens the unlocked door, makes the delivery, and then closes the door and turns the rotary latch counter clockwise until it latches in the locked position. There are three independent and distinct ways to unlock the mechanism: (1) a key can be used to unlock the mechanism; (2) a combination lock can be used to unlock the mechanism; or (3) an emergency release paddle, for child safety is located on the lower back cover of the lock, and can be pushed to unlock the mechanism. If children were playing around the enclosure and one child was locked in the enclosure by another, the child in the enclosure need only to push the paddle to release the lock, and then push the door open. Once unlocked either by the key, the combination, or the release paddle the latch will remain unlocked. The combination of the lock can only be changed by use of the key lock.
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