Patent ID: 6977572
Filing Date: 2005-12-20
Classification: H01F

Abstract:
1. A stick-shaped ignition coil comprising: a center core; a primary coil that is arranged on an outer circumferential side of the center core; a secondary coil that is arranged on the outer circumferential side of the center core; a body case that is arranged on an outer circumferential side of one of the primary coil and the secondary coil, which is on the outer circumferential side of the other of the primary coil and the secondary coil; an igniter; a head case that accommodates the igniter, the head case being provided to an upper end portion of the body case; a holder that is arranged between the igniter and upper end portions of all the center core, the primary coil, and the secondary coil; and an electrically insulative resin that is filled in a first space, which is formed of a gap defined among the center core, the primary coil, the secondary coil, the body case, and the holder, wherein the holder defines at least one resin flow hole through which epoxy resin is supplied into the first space, and the holder defines at least one vent hole through which air in the first space is vented to an outside.