公开(公告)号：US06596215B2

公开(公告)日：2003-07-22

申请号：US09955953

申请日：2001-09-20

申请人： Eiji Mayumi ,  Yasuhiro Ota ,  Kazuyo Okajima

发明人： Eiji Mayumi ,  Yasuhiro Ota ,  Kazuyo Okajima

IPC分类号： B29C4514

CPC分类号： H02K1/145 ,  H02K37/14

摘要： A stepping motor having a rotor consisting of a permanent magnet magnetized such that N poles and S poles are alternately arranged in the hoop direction, stator cores with pole teeth oppositely disposed on the outer peripheral surface of the rotor, and a coil bobbin integrally containing the stator cores as the result of resin molding and being used for supporting a coil wound thereon. In the stepping motor, holes are formed in the coil bobbin, and the holes range from an outer wall of the coil bobbin to the outer peripheral surfaces of the pole teeth. In the stage of resin molding, the dies are brought into contact with the pole teeth by the utilization of the holes, thereby preventing the pole teeth from being declined in the radial direction, and securing a satisfactory rigidity of the coil bobbin.

摘要翻译： 一种步进电动机，其具有由永久磁铁构成的转子，所述永磁体被磁化以使得N极和S极在环向方向上交替布置，定子铁心具有相对设置在转子的外周面上的极齿，以及线圈架， 定子铁芯作为树脂成型的结果，用于支撑卷绕在其上的线圈。 在步进电机中，在线圈架上形成有孔，并且孔从线圈架的外壁到极齿的外周面。 在树脂成型的阶段，通过利用孔使模具与极齿接触，从而防止极齿沿径向下降，并且确保线圈架的良好刚性。