| 摘要 |
PROBLEM TO BE SOLVED: To provide a chair having a backrest whose height is fixed regardless of the presence/absence of armrests easy and stable to attach. SOLUTION: Back supports 2a are disposed on the left and right sides of a seat. A boss body 17 smaller than the back support 2a in the plane shape is set on each back support 2a to project upward, and therefore, the upper end face of the back support 2a is exposed to the outside of the boss body 17. Boss holes 39, into which the boss bodies 17 are fitted, are bored in left and right attaching parts 12c of an outer shell 12 which constitutes the backrest 4. A wide hole 20 into which the upper part of the back support 2a is fitted and a small hole 21 into which the boss body 17 is fitted are bored in each armrest 5, and accordingly, the armrest 5 is held at the back support 2a in such a way as can not fall. A spacer 16 is fitted into the boss body 17 when the armrest 5 is not used. COPYRIGHT: (C)2009,JPO&INPIT
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