| 摘要 |
<p>PURPOSE: A back supporting apparatus of a chair is provided to minimize the left and right movement of user's back and to rotate a back support according to the left and right movement of user's back. CONSTITUTION: A back supporting apparatus of a chair comprises: a back support(100) supporting the right and left of the back at the same time; a back support supporting stand(200) which supports the back support; a fixing unit(300) which fixes the upper part of the back support to the back support supporting stand; and an elastic unit(400) which provides elastic force so that the lower part of the back support can move to the right and left based on the back support supporting stand; a lumbar rest(500) supporting the lumbar of a user; and a mobile unit(600) which moves the lumbar rest forward and backward.</p> |
