| 摘要 |
A door lock assembly includes a latching mechanism for latching a door. The latching mechanism has a hollow housing, a latch bolt with a tapered head portion and a body portion mounted slidably in the housing, an actuating block, a connecting member connected to the latch bolt, and a crank arm interconnecting the actuating block and the connecting member. The latch bolt is movable between a first latching position wherein both of the head portion and the body portion extend outwardly of the hollow housing, and a second latching position wherein only the head portion extends outwardly of the hollow housing. The crank arm is turned to an inward position when the latch bolt is in the second latching position. The crank arm is turned to an outward position when the latch bolt is in the first latching position. A spring is mounted in the housing and biases the latch bolt to move to the first latching position. A retaining member is disposed on the housing for retaining the crank arm in the inward position against the action of the spring. A releasing member is disposed in the hollow housing for causing the crank arm to be released from the retaining member when the latch bolt is moved to an unlatching position from the second latching position, thereby moving the latch bolt to the first latching position.
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