| 摘要 |
<p>PROBLEM TO BE SOLVED: To sufficiently ensure a withstand voltage between a secondary coil and a magnetic core arranged inside, even in a compact firing coil equipment to be mounted on the plug hole of an engine main body. SOLUTION: The outer periphery of a magnetic core 3 (and a permanent magnet 6 in the case of the presence of a magnet) inside a secondary coil bobbin 2A is covered with several layers of a high insulating film 20. Thus, the center positioning of the magnetic core 3 for the coil bobbin 2A can be attained, and even when the thickness of the coil bobbin 2A between the secondary coil 2 and the magnetic core 3 is thick, a withstand voltage can be ensured, and a compact firing coil device can be realized.</p> |
