| 摘要 |
The invention provides greater rigidity in a wiper arm unitarily formed of an arm shank section for connecting to an arm head and an arm piece section for connecting to a wiper blade. An intermediate section is formed between the arm shank section and the arm piece section of the wiper arm, having a bottom surface portion and folded-piece portions which approach the bottom surface portion and oppose each other. While the bottom surface portion is laterally curved, the thickness of the intermediate section facing a window surface is over twice the thickness of a plate material by forming a gap between the bottom surface portion and the folded-piece portions.
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