IGNITOR FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide an ignitor for an internal combustion engine preventing peeling-off and crack of a joining part of circuit elements by cold heat stress. SOLUTION: A circuit board 11 is guided by a rail 30 in a case 20 to be stored in the case 20. The rail 30 is formed into recessed/projecting shape having a plurality of projections 31 projecting to the side of the circuit board 11. The projection 31 is in contact with the external wall of the circuit board 11 so as to prevent the circuit board 11 from vertically rattling before filled with potting resin 40. When vibration is applied while injecting filler 50 inside the case 20 with an ignition circuit 10 stored therein, the circuit board 11 is preventing from shaking floating or inclining by the vibration and is stored in an original position. This constitution can reduce the stress acting on the circuit element of the ignitor circuit 10 from the potting resin 40 due to the temperature change to prevent the peeling-off and the crack of the joining part of the circuit elements by the cold stress.