| 摘要 |
PURPOSE: A chair frame is provided to reduce the size of a frame body and production costs as a fixing member, fixing the end of a spring, is formed on a sitting board frame. CONSTITUTION: A frame(A) consists of a sitting board frame(2) and a frame body(1). A fixing member(20) is formed at the bottom of the sitting board frame, and one end of a spring is fixed on the fixing member. A height adjusting part(22) is fixed on the sitting board frame in the rear area of the fixing member, and has fixing teeth(23). In the frame body, one end of the sitting bard frame is hinged by a rotation shaft(3), and the spring is fixed. A spring tension control part is installed in the frame body to control the tension of the spring. And a control part(10) for an angle of inclination is also installed in the frame body to be engaged with the fixing teeth of the height adjusting part.
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