Power seat assembly with motor actuated spring release and rewind of a seatback sector and with the motor removed from an inertial load path such as during an impact event

Abstract

A power seat assembly with motor actuated release and rewind of a seatback sector. First and second support plates sandwich a forwardly biased seatback sector and a cam engaged with the seatback sector in an upright position. A first pin extends from said cam offset its pivotal connection and passes through a slot defined in the second support plate to define a range of pivotal motion of the cam. A toothed gear sector rotatably mounted to an exterior of the second support plates and exhibits a polygonal shaped portion as well as an end shoulder offset and inwardly recessed from exteriorly defined teeth and the polygonal shaped portion. An electric motor includes an output gear in toothed engagement with the gear sector and for rotating the gear sector in a first direction so that the polygonal shaped portion contacts and deflects the pin and cam out of contact with the seatback, causing it to rotate to a forward dump position. A second pin extends from the seatback sector and contacts the end shoulder at the dump position, the motor rotating the gear sector in a second direction and forcibly rewinding the seatback sector, against its bias, to the upright design position coinciding with the cam re-engaging the seatback sector.