IGNITION COIL FOR INTERNAL-COMBUSTION ENGINE AND AUTOMOBILE

摘要

PROBLEM TO BE SOLVED: To provide an ignition coil which can surely prevent a secondary coil from being short-circuited irrespective of a fluctuated insulation breakdown voltage of a wining.

SOLUTION: The ignition coil for an internal-combustion engine is made by coaxially arranging a primary coil 5 and a secondary coil 3 outside a central iron core 1. In this case, the secondary coil 3 is comprised of a nearly cylindrical secondary bobbin 2 and a winding WR wound around the secondary bobbin 2. The secondary bobbin 2 is divided into a plurality of winding sections SC by a nearly annular flange FG, and a transfer part 21 is formed to the flange FG to deliver the winding to the adjoining winding section. The flange FG following the transfer part 21 is formed with an introduction groove 25 for receiving the delivered winding.

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