A connector, for connecting to a plurality of substrates, the connector comprising: a plurality of bases 110 disposed on the substrates 10 individually, each of the bases comprising: a plurality of terminals embedded in the bases, wherein each terminal has a fixing end which is electrically connected to the corresponding substrate and a contact end which is related to the fixing end; and characterised by: a shaft pivoted to the bases, the shaft comprising: a first element; a second element stacked with the first element, two ends of the second element comprising a plurality of first conductive circuits and a plurality of second conductive circuits, wherein the first conductive circuits are electrically connected to the second conductive circuits correspondingly, and each of the first conductive circuits and each of the second conductive circuits have a first pad and a second pad on a surface of the second element individually; and a plurality of conductive rings disposed around two ends of the shaft and electrically connected to the corresponding first and second pads, individually, wherein when the shaft is rotatably assembled to the bases, the first pads and the second pads are electrically connected to the terminals through the conductive rings, and the conductive rings are adapted to continuously contact with the contact end during the shaft being rotated related to the bases. a plurality of bases 110 disposed on the substrates 10 individually, each of the bases comprising: a plurality of terminals embedded in the bases, wherein each terminal has a fixing end which is electrically connected to the corresponding substrate and a contact end which is related to the fixing end; and characterised by: a shaft pivoted to the bases, the shaft comprising: a first element; a second element stacked with the first element, two ends of the second element comprising a plurality of first conductive circuits and a plurality of second conductive circuits, wherein the first conductive circuits are electrically connected to the second conductive circuits correspondingly, and each of the first conductive circuits and each of the second conductive circuits have a first pad and a second pad on a surface of the second element individually; and a plurality of conductive rings disposed around two ends of the shaft and electrically connected to the corresponding first and second pads, individually, wherein when the shaft is rotatably assembled to the bases, the first pads and the second pads are electrically connected to the terminals through the conductive rings, and the conductive rings are adapted to continuously contact with the contact end during the shaft being rotated related to the bases. a plurality of terminals embedded in the bases, wherein each terminal has a fixing end which is electrically connected to the corresponding substrate and a contact end which is related to the fixing end; and a shaft pivoted to the bases, the shaft comprising: a first element; a second element stacked with the first element, two ends of the second element comprising a plurality of first conductive circuits and a plurality of second conductive circuits, wherein the first conductive circuits are electrically connected to the second conductive circuits correspondingly, and each of the first conductive circuits and each of the second conductive circuits have a first pad and a second pad on a surface of the second element individually; and a first element; a second element stacked with the first element, two ends of the second element comprising a plurality of first conductive circuits and a plurality of second conductive circuits, wherein the first conductive circuits are electrically connected to the second conductive circuits correspondingly, and each of the first conductive circuits and each of the second conductive circuits have a first pad and a second pad on a surface of the second element individually; and a plurality of conductive rings disposed around two ends of the shaft and electrically connected to the corresponding first and second pads, individually, wherein when the shaft is rotatably assembled to the bases, the first pads and the second pads are electrically connected to the terminals through the conductive rings, and the conductive rings are adapted to continuously contact with the contact end during the shaft being rotated related to the bases.