| 摘要 |
PURPOSE: An armrest of a chair which selectively installs a seat board of various types is provided to ascend and descend a seat board in the control of a height. CONSTITUTION: A pair of armrest frames(120, 120') is perpendicularly supported in both sides of a connection member(110). Sliders(130, 130') are combined to the top and bottom side of the armrest frame. A horizontal support(140) is connected to both sides of a slider. A seat panel is installed in the horizontal support. A driving unit is installed in the armrest frame and the slider. The driving unit ascends and descends the slider to the top and bottom.
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