Groove -type reverser

The utility model discloses a groove -type reverser, make the switching -over copper sheet that the circumference equipartition was laid including the plastics mold core with at the excircle of plastics mold core, the top of switching -over copper sheet is equipped with the bonding wire step, and welding groove is seted up to the bonding wire step, carries out insulated isolation, its characterized in that through the mica sheet between the piece of 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 utility model discloses foreign matter contact in the time of can preventing the commutator installation between