| 摘要 |
In order to provide a lumbar support apparatus whose position can be adjusted by a simple structure and which can softly support a lumbar vertebra portion of a sitting person, a lumbar support apparatus of a chair according to the present invention is configured by two lumbar support members 10 which are separated into left and right parts, each of the lumbar support members 10 includes a lumbar support portion 11 supporting the lumbar vertebra portion and a stay portion 12 supporting the lumbar support portion, and an end portion of the lumbar support stay portion 12 is rotatably connected and attached to a back frame 2 via a rotation shaft 14, so that the position of the lumbar support portion 11 in the height direction can be adjusted by moving the same such that its distal end side is moved in a circular manner about the rotation shaft 14.
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