| 摘要 |
A chair is equipped with a leg column 1, a seat 3, and a back support 4. An intermediate supporting member 9 is fitted to an upper end of the leg column 1, the seat 3 and a back frame 5 are fitted to the intermediate supporting member 9, and the back support 4 is fitted to an upper end of the back frame 5 via a joint unit 11. The seat 3 has an elongated shape when viewed from the top, and is fitted to the intermediate supporting member 9 to swivel horizontally. The back support 4 can be turned freely around a first axis 13 and also can be turned freely around a second axis 12. Since the seat 3 and the back support 4 can be changed into various modes, a using mode of the chair can be changed variously. |
