APPARATUS OF ADJUSTING BACK PROTRUSION OF SEAT

摘要

PURPOSE: An apparatus of adjusting the protrusion of a seatback is provided to adjust the projection quantity of the seatback by being moved following the movement of a passenger. CONSTITUTION: An apparatus(100) of adjusting the protrusion of a seatback comprises a guide member(110), a support plate(120), a primary moving member(130), a secondary moving member(160), a curve driving spiral shaft(180), and a stopper(190). The guide member guides the moving of the support plate. The support plate is installed in a seatback. The primary moving member is fixed in the support plate and installed to be moved along the guide member. The secondary moving member is fixed in the primary moving member and installed to be moved along the guide member. The curve driving spiral shaft is coupled with the female spiral portion(161) of the secondary moving member. The stopper limits the straight distance between the primary moving member and the secondary moving member.