Patent ID: 9206783
Filing Date: 2015-12-08
Classification: F02P,H01F,H01T

Abstract:
1. An ignition coil for an internal combustion engine comprising: a coil body which has a base end and a top end farther away from the base end and includes a coil casing, a primary coil, and a secondary coil, the primary coil and the secondary coil being disposed coaxially with each other within the coil casing, the primary coil including a primary spool which is made of resin and around which a primary winding is wound, the primary winding having a winding end which extends from the primary spool substantially in a winding direction that is a direction in which the primary winding is wound; and a connector casing which includes a fitting hole in which the base end of the coil body is fit and a connector for energizing the primary coil, the connector also including a conductive terminal which extends from the fitting hole to the connector and has a conductor fastener disposed inside the fitting hole, the conductor fastener having formed therein a gripping slit which extends in a direction in which the coil body is fitted into the connector casing, wherein the primary spool is equipped with a backup support which protrudes toward the connector casing in a fitting direction that is a direction in which the based end of the coil body is fitted into the connector casing, the backup support working to physically support the winding end, wherein the connector casing also includes conductor guides which extend toward the primary spool in the fitting direction and are disposed away from each other across the conductor fastener in the winding direction, each of the conductor guides having a guide slit into which the winding end is inserted, the guide slit including a main guide slot and a tapered opening, the main guide slot having side wall extending substantially parallel to each other, the tapered opening leading to the main guide slot and having a width tapering away from the coil body in the fitting direction, and wherein each of the conductor guides is so shaped that the winding end is inserted into the guide slit before being thrust into the gripping slit of the conductor fastener when the coil body is fitted into the connector casing.