| 摘要 |
The present invention relates to a back of a chair, including: a frame formed in a rectangular frame shape; a seat installed at a front side or in an internal space of the frame; a lumbar support which supports a waist area while being formed in a shape corresponding to a waist area shape of a user; a bracket which is combined to both sides and a lower part of the frame, and is combined to the lumbar support while being distance-adjustable; and an elastic unit which provides elastic force by being installed between the lumbar support and the bracket so as to support the lumbar support elastically. The back of the chair of the present invention can obtain the effect of being able to adjust protrusion of the lumbar support selectively according to a body type and a posture of the user by preparing the elastic unit between the lumbar support and the bracket. |
