| 摘要 |
<p>A mortise lock assembly (10) is provided for mounting in a door opposite a strike plate on a door jamb. The assembly includes an automatic deadbolt feature with a bolt retractor arm (70) that directly contacts and applies inward retraction pressure to a latch bolt (90) and a deadbolt (34) in response to bolt retractor hub (64) rotation to retract the latch bolt and the deadbolt. Two deadbolt stops engage two housing stops when the deadbolt reaches the deadbolt extended position and restrain the deadbolt against further outward movement. Coil extension springs (46, 96) continuously bias the deadbolt and the latch bolt against retraction. A dead lock blocker (52) releasably holds the deadbolt in the deadbolt extended position. The bolt retractor arm is additionally engageable with the blocker to release the blocker in response to bolt retractor hub rotation. A trigger (56) releasably engages and retains the deadbolt in the deadbolt retracted position. The trigger releases the deadbolt when the door closes and the door jamb drives a bolt portion of the trigger inward. Forming the trigger bolt from Dupont Delrin, low-friction plastic, minimizes door closing forces.</p> |
