| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve driving unit capable of automatically returning a valve member which was in an opening position when power failed to a closing position, by respectively driving a plurality of valve members with a small and inexpensive constitution. SOLUTION: This valve driving unit 1 pushes in the valve members 101 and 102 of a wash water supply device, by driving two cams 11 and 12 by a common stepping motor 2. In the power failure, since the mechanical connection in a common driving transmission mechanism 4 to the cams 11 and 12 from the stepping motor 2 is cut off by a clutch mechanism 3, supply of wash water is stopped, by displacing the cams 11 and 12 by energizing force impressed on the cams 11 and 12, without making detent torque of the stepping motor 2 act on the cams 11 and 12. COPYRIGHT: (C)2008,JPO&INPIT
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