| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain both high voltage output characteristics and insulation property even at a limited dimension, by electrically insulating between a secondary coil assigned around an iron core and the iron core. SOLUTION: Relating to an ignition coil, a secondary bobbin 21 is assigned around an iron core 30 and a secondary winding wire 22 is wound around a secondary coil part 23, thus a secondary coil 20 is formed, and a primary bobbin 11 is assigned around the secondary coil 20, and a primary winding wire 12 is wound around a primary coil part 13, so that a primary coil 10 is formed, with insulation materials 40-40 assigned at both ends parts in longitudinal direction in cylindrical space formed with the inside periphery of the secondary bobbin 21. The iron core 30 is sandwiched and fixed between the insulation materials 40-40 for forming a space 50, with the iron core 30 insulated from the primary and secondary coils. With the iron core 30 intentionally charged, an absolute value of electric potential difference between the secondary coil 22 and the iron core 30 can be close each other between high voltage side and low voltage side of the secondary coil 22.</p> |
