| 摘要 |
The chair back is reclined independently of movement of the footrest which is operated by a handle. Detents associated with the handle mechanism allow the footrest to be extended and retracted into any four positions including fully extended, fully retracted and two intermediate positions. As the back is reclined, the seat and arms which constitute a unit, are first tilted to a predetermined "bucketing" angle by the locking mechanism, forward rocking is inhibited then rearward rocking is also prevented by the novel locking mechanism. The locking mechanism mounts on the underside of the cam frame, between the cams and works off a torque tube that moves angularly about its long axis as the footrest is operated and which moves forward and upwardly and rotates angularly as the chair back is reclined. The seat and frame unit also move forwardly and upwardly as the chair is reclined. In the preferred form, the chair is a platform rocker; it may also be mounted on a swivel platform rocker base. The back is provided with tapered sleeves which fit over tapered tongues on the mechanism to allow the chair to be shipped knocked down, and then set-up. The footrest includes two sections which store one behind the other when retracted, then move to coplanar relationship as the footrest is extended to its first position to provide greater extension. The lazy tongs action of the footrest extending and retracting part of the mechanism is skewed to permit exposed front rail and/or high leg styling for the base. The design of the mechanism permits a particularly cushioning seat filling to be used. |
