| 摘要 |
PROBLEM TO BE SOLVED: To provide a natural ventilation window which can realize a large angle at which a shoji opens and which enables the shoji to move smoothly. SOLUTION: The natural ventilation window is provided with the shoji 1, a rigid frame 2, a main arm 3 and a sub-arm 4. The upper part or the lower part of the shoji 1 is connected to the rigid frame 2 so that it can freely move up and down and that it can rotate freely. One end of the main arm 3 is connected to the position of the center of gravity of the shoji 1 so that the main arm can rotate freely, and the other end is connected to the upper part or the lower part of the rigid frame 2 so that it can freely move up and down and that it can rotate freely. One end of the sub-arm 4 is connected to the midpoint of the main arm 3 so that it can rotate freely, and the other end is connected to the midpoint of the rigid frame 2 so that it can rotate freely. COPYRIGHT: (C)2011,JPO&INPIT
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