| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a protector which prevents water from entering a plug hole when the water is splashed to a rubber part. SOLUTION: Grooves are formed on a surface of a rubber part to be abutted against an ignition coil. Grooves are composed of arcuate first grooves 26a to 26d each having different diameter, second grooves 27a to 27d for radially communicating the first grooves 26a to 26d to each other, third grooves 28a, 28b for communicating the first groove 26a to the radially outside and located symmetrically in respect to a center of the rubber part. One end of an air hole 29 is communicated with the first groove 26b, at its position spaced from the second groove 27b.</p> |
