| 摘要 |
PROBLEM TO BE SOLVED: To provide a seating apparatus that is adaptable to both a physically-healthy person and a physically-disabled person, and can easily maintain the posture of the head of a human body for a long period of time such that the head exactly faces to the front side so that a user can look straight naturally.SOLUTION: A seating apparatus includes a sitting part 3 supported by a frame 2, and upper support poles 8 supported by the frame 2 on the back side of the sitting part 3. The upper support poles 8 are provided with right and left rotating shafts 10 with a horizontal direction as an axial direction, and a curved back rest 4 held between the right and left rotating shafts 10, and pivotally supported for free rotation and inclination. The curved back rest 4 is provided in the curved inner surface thereof with a contact surface 6 for supporting a human body. The central portion 14 of the curved inner surface of the contact surface 6 has the most proximate position point at a position within 2 cm in radius from a support point axis connecting the right and left rotating shafts 10. In addition, the height of the upper end of the central portion of the contact surface 6 is 4 to 8 cm higher than the height of the support point axis when the curved inner surface of the contact surface is at an upright position. |
