Patent ID: 8922314
Filing Date: 2014-12-30
Classification: H01F

Abstract:
1. An ignition coil comprising: a coil being attached to a main core portion, and being sandwiched between and held by an auxiliary core portion and a side core portion; and a covering layer made of an elastic body, the covering layer being formed in a clearance at least between an end face of a coil bobbin and an inner circumferential surface of the main core portion or the auxiliary core portion facing the end face of the coil bobbin; wherein flange portions of the main core portion and the auxiliary core portion are covered with the covering layer made of the elastic body and configured as a single molded assembly component; wherein the covering layer has a portion projecting in a stacking direction of the main core portion that positions the coil bobbin into which the main core portion is inserted; a projecting portion of the coil bobbin is formed at the auxiliary core portion side of the coil bobbin; a recess is formed by the portion of the covering layer projecting in the stacking direction and a remainder of the covering layer; and the projecting portion of the coil bobbin fits in the recess so that the coil bobbin is positioned.