Moveable back panel for a vehicle seat
View Patent ↗A vehicle seat having a seat back including an actuatable back panel. The back panel of the seat back may be moved between a normal, or flush position, and an actuated, or spaced position, relative to the seat back assembly. The back panel may be provided with connectors that may be used to connect the back panel to the seat assembly. The back panel is actuated in the event of a rear end collision to provide added clearance for penetration of an occupant's torso into the seat back without interference by seat accessories, such as an adjustable lumbar system, a bolster assembly, massage assembly, or a heating/cooling system. The seat accessories may be secured to the back panel as a sub-assembly to facilitate manufacture. A resilient member biases a linkage or torsion bar to automatically reset the back panel.
1. A vehicle seat having a back rest for supporting the back of a seat occupant, the backrest comprising:
a seat back support assembly;
a cushion attached to the seat back support assembly;
a back panel that is movable between a flush position in which the back panel is secured flush to the seat back support assembly and a spaced position in which the back panel is retained in a spaced relationship relative to the seat back support panel;
a torsion bar operatively connected between the back panel and the seat back support assembly, wherein the torsion bar extends generally vertically across the back panel and is secured to the seat back support assembly adjacent first and second spaced portions of the seat back support assembly that are located near a top and a bottom of the seat back support assembly, respectively, and wherein forces applied by an occupant in a collision move the back panel from the flush position to the spaced position and against the force of the torsion bar, and wherein the torsion bar resets the back panel to the flush position after the collision.