| 摘要 |
PURPOSE: To provide a chair which is moved in the longitudinal direction along a user's back not to rub the back and produce wearing-away and discomfort feeling by arranging a chair back part and a chair seat part in such a manner that the common axis on which the above parts mutually turn is positioned adjacent to a point H, that is, a hip joint of a user. CONSTITUTION: A chair back part and a chair seat part are connected to each other in such a manner as to freely mutually turn on a common axis positioned above the chair seat part 6, in front of the chair back part 5, and substantially adjacent to a hip joint of a sitting user to limit the adjacent space relationship between the hip joint and the common shaft. The chair back part is supported on a base 4 to enable backward inclination of the chair back part. Further, the chair seat part is supported on the base to move the chair seat part on the base, so that the backward inclination of the chair back part simultaneously shifts the positions of the chair back part, the chair seat part and the common axis to keep the adjacent space relationship between the common axis and the hip joint of the sitting user and give improved sitting comfortableness and support of the user.
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