| 摘要 |
PURPOSE:To obtain a sufficient cooling effect and to prevent the contamination of a display part by blasting by directing the blast of a fan downward of a body. CONSTITUTION:A housing 1 is made of a metallic plate of, for example, an aluminum alloy, etc., having an excellent thermal conductivity and has an aperture 1' at its front surface side. This aperture 1' is held covered by a transparent material 2, such as glass sheet. The housing 1 is, therefore, completely shut off from the outdoor air (outer part of the housing 1). The body 3 is provided by maintaining a prescribed spacing from the inside wall of the housing 1 within the housing 1 facing the transparent material 2. The body 3 has the display part 4 formed by disposing many LEDs on the transparent material 2 side. Further, the display part 4 is mounted via mounting members 7, spaced from each other, to a base plate 6 fixed to a frame 5 which is fixed to the housing 1. The fan F of a propeller type is provided above the body 3 and below the upper wall 1'' of the housing 1 so as to blast the air toward the body 3 side. |
