Presentation of an adjustable lumbar support mechanism for use in the airline aircraft seats. A new method of lumbar adjustment is introduced utilizing a push button (10) and control cable (12) to unlock the positioning rod (42). Rod holds any selected curvature of the lumbar support panel (46). The lumbar panel is formed and preloaded to a convex shape (50) and assumes the most forward adjustment position when control button is depressed and while pressure on the seat back is removed. The lumbar panel is flexible to assume any intermediate curvature when control button is depressed and when the passenger lightly pushes back against the seat back in the lumbar region. The new lumbar system is a fast acting device compared to traditional knob driven units and permits a frequent, quick and easy readjustment of lumbar position whenever said push button is depressed.
An apparatus for adjusting the arching of a resiliently flexible support element (4) for supporting the pelvic and/or lumbular vertebrae in a back rest of a seat including an arching mechanism comprising a spring and an operating mechanism. According to the invention the spring (20, 35; 21, 38) is included in the force transmission tract for adjusting the arching. Preferably a spring (20, 35) is fitted between one end of the support element (4) and the force transmission member of the arching mechanism and/or a spring (21, 38) is fitted to the free end of the force transmission member of the arching mechanism behind the operating mechanism.
A lumbar support device for an automotive seat, which comprises a drive mechanism, a crank-like rod operatively connected to the drive mechanism, an elastic synthetic resin support plate, the upper part of which is movably secured to a seat back frame within a seat back of the seat, and a lumbar support portion defined in the lower part of the support plate. The lumbar support portion is formed in a cambered or forwardly curved shape. A forward and backward displacement of the support plate may be ajustably effected by the drive mechanism and crank-like rod to apply a pressure against the lumbar support area of foam cushion member of the seat back, and because of integral formation of both support plate and lumbar support portion, a gradual pressure gradient or distribution may be attained in the seat back cushion member, without creating a local non-pressure or extremely soft spot therein.
A personal transportation seat, in particular for aircraft passengers, includes individually adjustable seat parts (3, 7). At least one seat part may be moved against a returning force, with a force reservoir (11), normally blocked by a locking device. A switch arrangement (35, 37) can move the locking device into an ineffective state to release the force reservoir (11) to generate the returning force on the movable seat part (3, 7). The switch device is a servo drive for each adjustable seat part (3, 7) for the generation of an adjusting force which renders each locking device ineffective. Each servo device is controllable by a manually displaced handle (35, 37), which is made to match the contour of the relevant seat part (3, 7) for adjustment, by virtue of its form and arrangement.
An apparatus for adjusting the arching of a resiliently flexible support element for supporting the pelvic and/or lumbular vertebrae in a back rest of a seat including an arching device comprising a spring and an operating device. The spring is included in the force transmission tract for adjusting the arching. Preferably a spring is fitted between one end of the support element and the force transmission member of the arching means and/or a spring is fitted to the free end of the force transmission member of the arching device behind the operating device.
A mattress may include one or more sections movable relative to one another, such as an adjustable head portion or an adjustable foot portion. Motors and/or other drive systems may be integrated within the mattress, and the mattress may be adapted for use with a convention frame or a conventional foundation.
