An element-side connection terminal (40) extending from a power conversion circuit unit (16) includes a first connection terminal portion (40A) that extends in a direction intersecting a direction of extension of a counterpart-side connection terminal (38); and a second connection terminal portion (40B) that is bent at a point before the first connection terminal portion (40A) reaches the counterpart-side connection terminal (38) in a direction to intersect the direction of extension of the counterpart-side connection terminal (38) such that the second connection terminal portion (40B) is provided with elasticity and is in an elastic contact with the counterpart-side connection terminal (38) at an angle. A tip end side (38T) of the counterpart-side connection terminal (38) and a tip end side (40T) of the second connection terminal portion (40B) are electrically joined.