| 摘要 |
A convertible chair which is adjustable between sitting and reclining positions features a support frame, a seat and a backrest in which the seat and backrest are tiltably mounted so that their relative inclinations can be adjusted to define the afore-mentioned sitting and reclining positions and also a series of intermediate positions. The adjustment mechanism is defined by a support element with a curved support surface which forms a support for the seat and which is pivotably mounted to the support frame at a distance from the pivot axis of the seat and a control linkage which extends between the backrest, or an extension thereof, and the support element so that on changing the inclination of the backrest the support element rotates about its pivot mount and adjusts the vertical height of the point of support of the seat. In modifications the control linkage can conveniently form part of an armrest of the chair and the mechanism is further adapted to deploy a leg support mechanism to move a legrest from a stowed position at the front of the chair to a position for supporting the legs of an occupant of the chair when the chair is in a reclined or semi-reclined position. A single support element can be provided substantially on the center-line of the seat or a pair of support elements can usefully be provided one to either side of the seat. |
