| 摘要 |
PROBLEM TO BE SOLVED: To provide a configuration for appropriately housing a circuit board and its wiring in a case on whose one end surface a wiring lead-out part is provided, in a switching power supply device.SOLUTION: A switching power supply device comprises: a circuit board mounting a component group configuring a light source lighting circuit, and to which input wiring from an AC power supply is connected at one end in a longitudinal direction, and output wiring for supplying a power to a light source is connected at the another end while interposing the component group; an insulation sheet covering the circuit board over the substrate longitudinal direction; and a case incorporating the circuit board via the insulation sheet, and having a wiring lead-out part on an end surface corresponding to the one end side. The output wiring is laid while crawling between an inner surface of the case and an outer surface of the insulation sheet, and the input wiring and the output wiring are led out from the wiring lead-out part. |
