Abstract: A circuit board connection structure includes an adapter circuit board and an interface circuit board. The upper board face of the adapter circuit board is provided with a connection via, and an arcuate adapter pad coaxial with the connection via. A conductive pin is secured to the arcuate adapter pad. The conductive pin is provided with a protrusion. The lower board face of the interface circuit board is provided with a rotation shaft, and an arcuate interface pad coaxial with the rotation shaft. The rotation shaft is inserted into the connection via. The interface circuit board is configured to swing relative to the adapter circuit board about the axis of the rotation shaft. The protrusion is pressed against the arcuate interface pad and is configured to slide relative to the arcuate interface pad.

Abstract: An electrical connector assembly includes a housing, a connector rotating unit and a second magnetic attraction element. The connector rotating unit is rotatable relative to the housing under action of an external force. The connector rotating unit includes a rotating body, a first magnetic attraction element fixed to the rotating body, and an electrical connector fixedly connected to the rotating body. The second magnetic attraction element is disposed in the housing. The second magnetic attraction element is configured to attract the first magnetic attraction element to rotate the connector rotating unit automatically back to an original position after the connector rotating unit is rotated and the external force is released.