| 摘要 |
PURPOSE:To prevent blades from breaking down due to thermal expansion and at the same time enable to ensure the energizing between heat generating body and its holding member by a structure wherein the blades of a rotary fan are made of the heat generating body and at the same time fan frames are axially pushed by elastic pushers. CONSTITUTION:When the temperature of blades 2 made of heat generating body or of a heat generating body 21 arranged near the blades 2 rises and consequently the blades 2 and the heat generating body expand thermally, fan frames 3 shift in the direction of a shaft 1 against the pushing force of elastic pushers, resulting in absorbing the axial thermal expansion of the blades 2 and the heat generating body 21. Because the heat generaing body 21 is pushed to the blades 2 or to the members 3a pinchingly holding the heat generating body 21 at all times with the proper contact pressure, which is determined by the pushing force of the elastic pushers, the energizing property between the members 3a and the blades 2 or the heat generating body 21 can be held favorably. |
