Slip ring device

A slip ring device comprising a plurality of ring members that are provided upon a rotation shaft so as to be lined up in sequence in an axial-line direction, each of the plurality of ring members being in contact with at least one brush, wherein

• the slip sing device further comprises a plurality of bus bars that are supported within the rotation shaft via an insulating member and extend along the axial-line direction, each of the plurality of bus bars being provided for each of the plurality of ring members, and wherein, on an inner circumferential surface of at least one of the ring members,
• a groove portion is provided, the groove portion being formed so as to extend along the axial-line direction and hollow outwards in a radial direction, and into the groove portion one end portion of the bus bar being set, and
• a reception groove portion is provided on the inner circumferential surface of a ring member of the plurality of ring members, an inward in the radial direction of the ring member the bus bar of another ring member passing through, the reception groove portion:
• being formed so as to extend in the axial-line direction and hollow outwards in the radial direction of the plurality of ring members;
• and
• receiving the bus bar of the another ring member via the insulating member.