| 摘要 |
PURPOSE:To eliminate correction of a core balance after a rotation detector is completed, to delete the number of steps and to improve productivity by providing a cutout at a copper plate having the same weight at a position radially opposed to a cylindrical conductor. CONSTITUTION:An insulator 1 and a cylindrical conductor 2 made of a copper plate having cutouts 6a, 6b are integrally molded by molding synthetic resin made of an insulator to constitute a rotation detector. The cutouts 6a, 6b are weight-balanced in a rotating direction in size of the same weights of the cut-out plates. Contactors 7a, 7b are brought into contact with the same positions axially oppositely in the radial direction of the outer periphery to obtain ON-OFF electric signals upon rotation as shown. Thus, since no unbalance in the radial direction upon rotation occur, a detector having excellent weight balance can be obtained. |
