Circuit board assembly, circuit board stack structure, and electronic device

A circuit board stack structure, comprising a third circuit board, a circuit board assembly, and a second circuit board that are stacked in sequence, wherein

• the circuit board assembly comprises a first connector, a first circuit board, and a second connection base that are stacked in sequence,
• the first connector is provided with a second electrical connection portion and a second connection portion, and the second connection base is provided with a fourth connection portion;
• a surface of the first circuit board that faces the first connector is provided with a third electrical connection portion and a third connection portion, and a surface of the first circuit board that faces the second connection base is provided with a fourth electrical connection portion;
• the first circuit board comprises a first conducting wire, and the first conducting wire, the third connection portion, and the second connection portion are electrically connected in sequence to form a second path;
• the fourth connection portion, the fourth electrical connection portion, the third electrical connection portion, and the second electrical connection portion are electrically connected in sequence to form a first path;
• a surface of the third circuit board that faces the circuit board assembly is provided with a first connection base, and the third circuit board is connected to the first connector through the first connection base;
• a surface of the second circuit board that faces the circuit board assembly is provided with a second connector, and the second circuit board is connected to the second connection base through the second connector;
• the third circuit board is provided with a first receiving portion and a second receiving portion, the first connection base is provided with a first electrical connection portion and a first connection portion, the second connector is provided with a fifth connection portion, and the second circuit board is provided with a sixth connection portion;
• in the first path, the sixth connection portion, the fifth connection portion, the fourth connection portion, the fourth electrical connection portion, the third electrical connection portion, the second electrical connection portion, the first electrical connection portion, and the first receiving portion are electrically connected in sequence;
• and
• in the second path, the first conducting wire, the third connection portion, the second connection portion, the first connection portion, and the second receiving portion are electrically connected in sequence.

An electronic device, comprising a circuit board assembly, wherein the circuit board assembly comprises a first connector, a first circuit board, and a second connection base that are stacked in sequence, wherein

• the first connector is provided with a second electrical connection portion and a second connection portion, and the second connection base is provided with a fourth connection portion;
• a surface of the first circuit board that faces the first connector is provided with a third electrical connection portion and a third connection portion, and a surface of the first circuit board that faces the second connection base is provided with a fourth electrical connection portion;
• the first circuit board comprises a first conducting wire, and the first conducting wire, the third connection portion, and the second connection portion are electrically connected in sequence to form a second path;
• the fourth connection portion, the fourth electrical connection portion, the third electrical connection portion, and the second electrical connection portion are electrically connected in sequence to form a first path;
• the circuit board assembly further comprises a transition board, and the transition board is stacked between the first circuit board and the second connection base;
• a surface of the transition board that faces the second connection base is provided with a sixth electrical connection portion, and a surface of the transition board that faces the first circuit board is provided with a fifth electrical connection portion;
• and
• the fourth connection portion, the sixth electrical connection portion, the fifth electrical connection portion, the fourth electrical connection portion, the third electrical connection portion, and the second electrical connection portion are electrically connected in sequence to form the first path.