| 摘要 |
PROBLEM TO BE SOLVED: To provide a chair mountable directly on a back frame, having the small number of components, capable of preventing omission of a lumber support, and adjusting stepwise smoothly vertical movement of the lumber support.SOLUTION: In a chair having at least a back frame, and a lumber support to be mounted on the back frame, the lumber support has a longitudinal movement regulation member for regulating longitudinal movement of the lumber support when being mounted on the back frame, and the back frame has a vertical movement regulation member for regulating vertical movement of the lumber support when the lumber support is mounted thereon. |
