Commutator

The utility model discloses a commutator, offer welding groove including plastics mold core and switching -over copper sheet, the outer disc of switching -over copper sheet at top position, carry out insulated isolation, its characterized in that through the mica sheet between the adjacent switching -over copper sheet: the top end of plastics mold core is higher than the top end of the copper sheet that commutates, and the top end that the top height of mica sheet is greater than the copper sheet that commutates highly is less than the top end height of plastics mold core, and the top end of switching -over copper sheet is kept apart the back by the mica sheet and forms the independent space that partly surrounds separately, the outer disc of switching -over copper sheet has inclined plane design except that the top, the outer disc of all switching -over copper sheets encloses a big -end -up's toper cylinder jointly. The utility model discloses the adjacent foreign matter contact who commutates between the co