| 摘要 |
PROBLEM TO BE SOLVED: To suppress a heat conduction to the periphery in simple configuration and to provide a high heat dissipating effect in respect to heat generating parts or peripheral parts thereof. SOLUTION: In a self-running power feeding device 16, grooves 1611 are formed on the surface of a casing 161 opposite to the mounting surface of a heating element 162 to gain a heat dissipating surface area. Space for the heating element 162 and the other peripheral circuit is secured for this increase in the radiation surface area, and the heat conduction to the other peripheral circuit is suppressed as well. Besides, the grooves 1611 formed on the casing 161 accelerate a wind flow.
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