Back plate assembly and electronic device

An electronic device, comprising:

• a back plate assembly including a base plate formed with a groove having a bottom wall and a pair of side walls opposite to each other in a first horizontal direction, and an arch plate assembled into the groove and having a pair of opposite ends in the first horizontal direction, a pair of end surfaces of the ends of the arch plate abut against the side walls and a part of a middle portion of the arch plate between the ends is not in contact with the bottom wall of the groove and the arch plate having a length less than a length of the base plate when assembled into the groove;
• an electronic component including a circuit board having a bottom side placed directly on the arch plate;
• and
• a connection mechanism mounting the electronic component on the back plate assembly and applying a loading force on the electronic component directed in a vertical direction of the arch plate,
• wherein the electronic component includes a socket connector mounted on a top side of the circuit board directly opposite the arch plate, a central processing unit mounted on the socket connector, and a heatsink mounted on the central processing unit.