Cartridge for vehicle-mounted accessory device

A cartridge for a vehicle-mounted accessory device, the cartridge comprising:

• a cylindrically-shaped housing that can be inserted into and removed from an insertion guide of a vehicle-mounted accessory device;
• and
• a plurality of contact conductors provided at a tip of the cylindrically-shaped housing, wherein
• the plurality of contact conductors form one or more rings and/or one or more arcs of different extents of curvature when viewing an axis in an insertion/removal direction of the cylindrically-shaped housing at an inner side, and are arranged in order from a higher extent of curvature to a lower extent of curvature, from an inner side toward an outer side, and
• when the cylindrically-shaped housing is inserted into the insertion guide, each of a plurality of contact terminals provided on the insertion guide contacts a corresponding contact conductor among the plurality of contact conductors.