Patent ID: 9343211
Filing Date: 2016-05-17
CPC Classification: F02P,H01F,H01T

Claim Text:
1. An ignition coil for an internal combustion engine, the ignition coil comprising: a coil section formed by arranging a primary coil and a secondary coil in a coil case, the primary and secondary coils being arranged at inner and outer periphery positions in a concentric manner; and a connector case section formed with a fitting hole for fitting an end portion of the coil section thereto, and having a connector portion for connecting and disconnecting current supplied to the primary coil; and a thermosetting resin filled in spaces formed in the coil section and in the connector case section, wherein, the primary coil is formed by winding a primary electric wire about an outer periphery of a primary spool made of a resin, the connector case section is provided with a terminal formed of a conductor, the terminal being arranged from inside the fitting hole to the connector portion, the terminal has an insertion portion arranged in the fitting hole, with an insertion slit being formed in the insertion portion in a fitting direction of fitting the coil section to the connector case section, the primary coil has a winding end portion drawn out substantially along a winding direction of the primary electric wire and inserted into the insertion slit in the fitting direction, the insertion portion comprises: the insertion slit is formed such that the insertion slit divides the end plate portion and continues to the pair of opposing plate portions, the thermosetting resin contacts the pair of opposing plate portions and the end plate portion, and curing and contractive force of the thermosetting resin caused when the thermosetting resin is cured acts on the terminal in a direction of narrowing the insertion slit.