| 摘要 |
The invention provides a chair that the switching between operation and fixation of rocking may be operated with the height adjustment of the chair by one operation lever. A resilient member is interposed between a seat frame whose height is adjustable by a cylinder and a back frame rotatably fitted to the seat frame, wherein a joint member is rotatably fitted to the seat frame with a vertical shaft, an operation lever led to the outside of the seat frame and a pressing piece which touches and leaves a button for rod advancing and retreating of the cylinder are provided with a rocking member which is rockably assembled to the joint member with a horizontal shaft, and an interlocking regulating member is attached to an arm piece of the joint member so that the rotation of the back frame may be adjusted by moving the regulating member.
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