| 摘要 |
PURPOSE: A reservoir tank for washer fluid is provided to prevent the breakage of the reservoir tank in spite of frozen washer fluid by improving the structure of an injection hole and to separately inject mold an injection unit, an upper unit, and lower unit of the reservoir tank. CONSTITUTION: A lower unit(32), an upper unit(31), and an injection unit(33) are separately formed in each different mold. Then, the lower unit and the upper unit are combined by high-frequency wave induction heating. In addition, the upper unit and the injection unit are joined with a threaded part. An end portion of an internal screw unit(31a) fills the injection unit after leaving an air hold space(34) while washer liquid fills the reservoir tank. Thereby, frozen washer fluid fills the air hold space for expanding force not to be applied to the reservoir tank.
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