| 摘要 |
PURPOSE:To uniform the temperature distribution in an enclosure and to prevent a handset from tending to overheat locally by disposing a heat radiation member effectively on a power unit. CONSTITUTION:A heat radiation plate 6 is fitted on the power unit 6 and heat radiated by the power unit 5 is conducted not only to the vicinity of the power unit, but also to other places. When an element as a heat generation source is mounted nearly in the center of the power unit 5, the heat radiation plate 6 is fitted in the vicinity of the element and its heat is conducted to places distant from the power unit 5 to reduce thermal influence upon the handset arranged right above it. Further, a part of the heat radiation plate 6 is put close to or abutted with the internal surface of the external cover 1 of the equipment and the heat generated by the power unit 5 is transmitted to the external cover 1 and further transmitted to the outside air to accelerate the cooling effect of the whole equipment. Consequently, the reception part 21 is prevented from tending to overheat.
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