Composite cable including collective braided shield
A composite cable includes a signal transmission cable including a pair of signal lines being arranged parallel to each other in a cable longitudinal direction and contacting to each other and a shield layer covering the pair of signal lines together, a pair of power supply lines being arranged contacting to each other and contacting to the shield layer, a collective braided shield covering around a cable core composed of the signal transmission cable and the pair of power supply lines collectively, a sheath covering around the collective braided shield. The collective braided shield is configured closely contacting to the shield layer in accordance with an outer shape of the shield layer.
1. A composite cable comprising:
a signal transmission cable including a pair of signal lines being arranged parallel to each other in a cable longitudinal direction and contacting to each other and a shield layer covering the pair of signal lines together;
a pair of power supply lines being arranged contacting to each other and contacting to the shield layer;
a collective braided shield covering around a cable core comprising the signal transmission cable and the pair of power supply lines collectively; and
a sheath covering around the collective braided shield,
wherein the collective braided shield is configured closely contacting to the shield layer in accordance with an outer shape of the shield layer.
2. The composite cable according to claim 1 , wherein the cable core is configured in such a manner that virtual hues connecting centers of the pair of signal lines and centers of the pair of power supply lines make a trapezoid shape in the cross-sectional view perpendicular to the cable longitudinal direction.
3. The composite cable according to claim 1 , wherein the shield layer includes as one piece a pair of flat areas extending straight along an arrangement direction of the pair of signal lines and a pair of round areas connecting ends of the pair of flat areas, wherein the pair of power supply lines are arranged contacting to one of the flat areas, and wherein the collective braided shield is closely contacting to an entire part of the flat area at a side where the pair of power supply lines are not contacting to and to a part of the pair of round areas at both sides of the flat areas.
4. The composite cable according to claim 1 , wherein each of the pair of signal lines comprises a signal conductor and an insulator covering around the signal conductor, wherein the insulator comprises an inner insulator covering around the signal conductor, and an outer insulator covering around the inner insulator, and wherein the outer insulator has a lower melting point than a melting point of the inner insulator.
5. The composite cable according to claim 4 , wherein the inner insulator has a lower permittivity than a permittivity of the outer insulator.
6. The composite cable according to claim 1 , wherein the signal transmission cable further comprises a resin tape spirally wrapping around the pair of signal lines, and wherein the shield layer comprises a metal tape on which a metal layer is provided on one side of a resin layer and an adhesive layer is provided on an other side of the resin layer, and configured by spirally wrapping the metal tape around the resin tape in such a manner that the adhesive layer is provided at a side of the resin tape.