| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent poor conduction due to freezing of condensation by controlling the condensation at a contact section of an engine starting device. Ž<P>SOLUTION: The engine starting device 1 is driven by an electric motor 2. A switch part 42 controlling electric power supply to the electric motor 2 includes a first conduction plate 41a connected to a motor side, a second conduction plate 41b connected to an electric power source side, and a switch plate 43 changing over conduction and insulation between the first and the second conduction plate 41a, 41b. A condensation inducing part 95 connecting a mountain part 97a and valley part 97b in a sawtooth shape is provided at a side edge 96 separate from a contact touch part 94 of the second conduction plate 41b. Since heat capacity is low and heat is easily dissipated, condensation easily occurs at a part end surface 98 of the contact touch part 94 and an edge 99. Condensation occurs at the condensation inducing part 95 earlier than the contact touch part 94. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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