To suppress the heat transmitted from a heat-generating component to a temperature sensor 51 via a circuit board 3 itself as a medium, and detect an internal atmospheric temperature with good accuracy.SOLUTION: A circuit board 3 composed of one sheet of multilayered circuit board is accommodated inside of an outer packaging member by being bent in a substantially U-shape by two thin-wall parts 17 which are secondarily processed by machining from a recessed groove 16. Electronic components including heat-generating components such as a CPU 21 are mounted in first and second rigid parts 11, 12. A temperature sensor 51 is mounted on the inside face of a temperature sensor mounting part 15 that constitutes the uppermost part when loaded aboard a vehicle. As the temperature sensor 51 faces a space inside of the circuit board 3 that forms a substantially U-shape, an atmospheric temperature can be detected with good accuracy. The heat transfer from the heat-generating components via the circuit board 3 itself is suppressed by the thin-wall parts 17.SELECTED DRAWING: Figure 5
電子回路装置
2022-10-13
Patent
Electronic Resource
Japanese