| 摘要 |
<p>PURPOSE: A seat back combining structure of a chair is provided, which can improve the convenience of use by efficiently buffering the weight of a user applied to the lumbar vertebra and seat back. CONSTITUTION: A seat back combining structure of a chair comprises a seat back(200) which is installed in the back side of the seat plate of the chair(100); lots of fixing apertures in the top and perforation parts in the outer circumference; a back board plate(210) which has a coupling aperture; a seat back cushion member(220) which is installed on frontal top surface of the back board plate and is fixed by a bolt; and a pair of lumbar vertebra supports(300) which are installed on both sides and are fixed by a bolt and a nut. The lumbar vertebra support consists of a lumbar vertebra support plate and a lumbar vertebra support cushion member(320).</p> |
