| 摘要 |
PCT No. PCT/JP96/02221 Sec. 371 Date Dec. 23, 1997 Sec. 102(e) Date Dec. 23, 1997 PCT Filed Aug. 7, 1996 PCT Pub. No. WO97/06706 PCT Pub. Date Feb. 27, 1997A protective cap is formed of a cap body having an inner layer and an outer layer with a clearance therebetween. A number of air holes are provided in the inner and outer layers so that the air holes in the inner layer are displaced from those in the outer layer, and a dam is provided around each of the air holes in the inner layer on a surface thereof facing the outer layer. A spacer formed of a vertical wall contacting the inner and outer layers is provided at least adjacent to each of the air holes of the inner layer. Thus, the protective cap has excellent ventilating capability, a waterproof feature in rain and strength.
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