| 摘要 |
PROBLEM TO BE SOLVED: To provide a plastic fan (cooling fan) of high reliability excellent in durability and safety. SOLUTION: This plastic fan is constituted so as to comprise a plastic-made fan part comprising a plastic-made fan blade and fan boss and a metal-made insert part 2 integrally molded in the fan boss of the plastic fan part to have almost circular plane shape and U-shaped sectional shape. Here, the metal-made insert part 2 is constituted by having a turn lock hole 2a arranged in a peripheral part with a desired space apart to communicate with an internal surface side from an external surface side, and a peripheral edge part of each turn lock hole 2a is constituted by a smooth flat surface in at least one side of external/internal surface sides of the metal-made insert part 2. |
