| 摘要 |
PROBLEM TO BE SOLVED: To improve durability of a supporting member and a supported member. SOLUTION: The top surface 28 of a first yoke 24 in a wiper blade 12 is made to be about arc-shaped curved surface. An oval-shaped pivot hole 32 curved along this curved surface is formed in the vicinity of the side surface 30. A pivot 20 is formed in the vicinity of the side surface 19 of a second yoke 14. In the wiping condition, a pressing force acts to a right angled direction to an axis and to an axial direction to the pivot 20 in the second yoke 14, and a turning force acts around an axis of the pivot 20. The top surface 28 and side surface 30 of the first yoke 24 abut on the top surface 16 and the side surface 18 of the second yoke 14, respectively. Also, the pivot 20 moves along the pivot hole 32 and the second yoke 14 turns along the curved surface, and the first yoke 24 supports the second yoke 14 while the pivot 20 does not come in contact with the pivot hole 32. Accordingly, abrasions or damages of the pivot 20 or the pivot hole 32 can be prevented and durability of the first yoke 24 and the second yoke 14 can be improved.
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