| 摘要 |
PROBLEM TO BE SOLVED: To prevent a backlash between a rotational internal machine installed to an electric wiring board and the electric wiring board due to a change in an ambient temperature. SOLUTION: A mounting engagement member 34 having an engagement part 34c engaged with a printed wiring board 40 is formed in a second housing 32 of the rotational internal machine 30, while an elastic member 35 elastically deforming for increasing engagement force between the engagement part 34c and the printed wiring board 40 is formed in a first housing 32 of the rotational internal machine 30. In this way, the engagement force between the engagement part 34c of the mounting engagement member 34 and the printed wiring board 40 is increased by resiliency of the elastic member 35, so that a backlash between the engagement part 34c and the printed wiring board 40 can be reduced regardless of a change in an ambient temperature.
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