ELECTRONIC CIRCUIT DEVICE

摘要

PROBLEM TO BE SOLVED: To improve vibration resistance of a connection terminal 23 with a tip solder bonded to a circuit board 13.SOLUTION: A controller comprises: a metal controller housing 6 which stores a circuit board 13; and a connection terminal 23 which extends from an actuator housing 3 through an opening 24 and has a tip fixed to the circuit board 13. The controller further comprises a semiconductor switching element 27 and an electrolytic capacitor 28 which are heat generating components and collectively arranged in a region adjacent to the connection terminal 23; and a heat mass 30 where the circuit board 13 is adhesively fixed to a top face 30a via a thermal adhesive 31. The thermal adhesive 31 improves heat dissipation and since the circuit board 13 is fixed to a controller housing 6 near the connection terminal 23, a load due to vibration is reduced.SELECTED DRAWING: Figure 6