Circuit board assembly and electronic device

An electronic device, comprising:

• a middle frame;
• and
• a circuit board assembly, wherein the circuit board assembly comprising at least the following:
• a frame plate, comprising a frame body, first soldering portions, and second soldering portions, wherein the frame body base a middle accommodating hole, an inner wall facing the middle accommodating hole, and an outer wall facing away from the middle accommodating hole, the first soldering portions are provided in an intermediate region located on the frame body between the inner wall and the outer wall, and at least one of the inner wall and the outer wall is provided with accommodating grooves, the accommodating grooves extend along a thickness direction of the frame plate, and the second soldering portions are provided in the accommodating grooves and connected to the frame body;
• and
• two circuit boards that are respectively provided on two opposite sides of the frame plate along the thickness direction, each circuit board of the two circuit boards comprises pads, and the first soldering portions and the second soldering portions are soldered to corresponding pads, respectively, and wherein surfaces of the second soldering portions that face away from the middle accommodating hole comprise a first concave surface, a second concave surface, and a third concave surface;
• the first concave surface, the second concave surface, and the third concave surface are depressed towards the intermediate region;
• the second concave surface and the third concave surface are respectively located on both sides of the first concave surface along a circumferential direction of the frame plate;
• and an intersecting region between the first concave surface and the second concave surface and an intersecting region between the first concave surface and the third concave surface both exceed an opening of the accommodating groove.