| 摘要 |
<p>A door closer includes an anchor assembly for mounting on a door frame, an actuator assembly for mounting within the thickness of a door which is hinged for movement between open and closed positions relative to the door frame, an operating member coupled by a linkage to the anchor assembly and mounted for a range of movements between a retracted position and an extended position, a resilient driving apparatus arranged to exert a driving force on the operating member to drive the operating member towards the retracted position to draw the door into its closed position relative to the frame, a damper mechanism operatively connected to the operating member so as to damp movement of the operating member at least in a direction towards the retracted position, and a resilient thrust device arranged to exert an increased driving force on the operating member over a defined part of its range of movement as the operating member approaches the retracted position, corresponding to movement of the door over a final part of its movement into its closed position, and wherein the resilient thrust device includes at least one spring which acts in a direction generally normally inwardly relative to the direction of movement of the operating member, to apply the increased driving force to the operating member.</p> |
