| 摘要 |
PURPOSE:To keep a suitable gap between a secondary bobbin and a primary coil, and miniaturize a device while specified ignition performance is ensured, by forming the secondary bobbin by molding en bloc synthetic resin, around a primary bobbin which contains a center core and the primary coil is wound around. CONSTITUTION:At specified positions between members 230, 230 constituting a primary bobbin 23, cores 11-13 and permanent magnets 17, 18 are arranged and fixed. A primary coil 21 is formed by winding a coil on the outer periphery of the primary bobbin 23. In this state, a second bobbin 24 is formed in a unified body by insert-resin-molding. Said bobbin is a cylindrical type whose section is almost rectangular, and a plurality of grooves are formed on the outer side surface. A wire is wound in each groove of the secondary bobbin 24 and the secondary coil is arranged, thereby forming a coil subassembly 10a. On the other hand, cores 15, 16 are subjected to insert-resin-molding, thereby forming holders 31, 32. |
