| 摘要 |
<p>A deadbolt assembly of the kind in which a deadbolt (l0 ) is mounted on a housing (l) for linear movement between an operative position in which deadbolt parts (ll,l2) extend across recesses (5,6) in the housing (l) to trap strike bars in the recesses (5,6) and an inoperative position in which the strike bars are not trapped. At least one actuator, such as turn knob (l3) is rotatably mounted on the housing (l) and is drivably connected to the deadbolt (l0) through a drive plate (l5) which rotates in response to operation of the actuator (l3). A drive pin (l6) is secured to the plate (l5) at a position radially outwards of the rotational axis of the plate (l5). The pin (l6) locates within a non-circular hole (30) provided in a carrier plate (24) forming part of the deadbolt (l0) and reacts against edges (32,33) of the hole (30) to cause the deadbolt movement. The pin (l6) moves along an arcuate path (20) in the plate (l5) between each of its two extreme positions (22,23), and at each of those positions the pin (l6) lies on a straight line which extends substantially parallel to the direction of movement of the deadbolt (l0) and which substantially intersects the rotational axis of the plate (l5). Both the deadbolt and the strike can be made from steel or other strong metal.</p> |
