JPS6229777U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a stepping motor to which this embodiment is applied in the rotational axis direction, Fig. 2 is a partially enlarged sectional view showing a conical recess of the embodiment, and Fig. 3 is a partially enlarged cross-sectional view showing a modified example. FIG. Magnetic pole teeth...1: Outer yoke, 2: Inner yoke, 3: Excitation coil, 4: Rotating shaft, 6: Rotor, 6a: Rotor support, 6b: Annular permanent magnet, 7: Bearing, 8:
End plate, 9: Conical recess, 11: Coil spring, 20
: Conical convex part.

Claims (1)

[Claims for Utility Model Registration] 1. A rotor fixed to a rotating shaft, a large number of magnetic pole teeth facing each other at intervals on the outer periphery of the rotor and arranged circumferentially, and an excitation coil that magnetizes the magnetic pole teeth. , a pair of end plates having bearings that support the magnetic pole teeth and the coil and rotatably support the rotating shaft; a conical surface having an inclined surface facing the end plate; a coil spring mounted in compression between the conical surface and the one end plate, thereby urging the rotor toward the other end plate; A stepping motor, characterized in that the rotor and the coil spring rotate together by pressing the coil spring against the conical surface. 2. The stepping motor according to claim 1, wherein the rotor has a conical recess whose diameter increases toward the end face, and the conical surface is formed by the circumferential surface of the recess. . 3. The utility model according to claim 1, wherein the rotor has a conical convex portion whose diameter decreases toward the end face, and the circumferential surface of the convex portion forms the conical surface. ping motor.