| 摘要 |
PURPOSE: To intensify the ergonomics characteristics of an inside shell by installing an elastic and flexible inside shell having a flexible holding member cantilevered to the leg of chair by using a way such as not interfering the flexibility of the holding member. CONSTITUTION: A stretching tube 17 is made as a U-shaped tube having an arm 29 extended to a rear from a front of chair. A bracket 31 is fixed to the end of the arm 29. A shell is integrally formed together with an inside shell, and is held as not move to an upper direction, a side direction, a front direction and a rear direction by a loop 71 extended downward, and the loop 71 is fixed to the bracket 31 by a fixing screw 73. An additional flexibility is given to the central part of a seat 43 when an occupancy adds his weight on a seat or the weight is removed from the seat without losing the flexibility of a finger, i.e., the holding member formed on the seat by arranging the supporting bracket 31 to the both sides of the seat 43, therefore, no influence is given on the characteristics of human engineering.
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