Variable-pitch slip ring

The invention discloses a variable-pitch slip ring. The variable-pitch slip ring comprises a conductive ring and a conductive brush wire, wherein insulating rings are arranged on the two sides of the conductive ring; a groove is formed, surrounding the periphery, in the outer side of the conducive ring; a brush head matched with the groove is arranged at the end part of the conductive brush wire; and the brush head and the bottom of the groove are in line contact or surface contact. According to the variable-pitch slip ring, the width of the conductive ring is kept the same, and the conductive contact area is enlarged by changing the original point contact into line contact or surface contact, so that the contact resistance is reduced and the signal transmission quality is improved; a T-shaped slot structure has a good guide and limiting function, so that the conductive brush wire can be well positioned in the T-shaped slot in rotation without being in contact with the insulating rings; and therefore, an elec