JPH0179384U

JPH0179384U -

Info

Publication number: JPH0179384U
Application number: JP1987174044U
Authority: JP
Priority date: 1987-11-14
Filing date: 1987-11-14
Publication date: 1989-05-29

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す分解斜視図、
第２図は同上の要部断面図、第３図ａ，ｂはそれ
ぞれ同上の要部断面図と要部平面図、第４図は同
上の組立過程における要部断面図、第５図は本考
案に係るステツプモータの要部断面図である。１０はハウジング、２１は回転軸、２２ａ，２
２ｂは回転子円盤、３２ａ，３２ｂはヨーク、３
３ａ_１，３３ｂ_１は第１ヨーク素体、３３ａ_２，
３３ｂ_２は第２ヨーク素体、３４ａ，３４はコイ
ル、３５_１，３５_２は周壁、３７は磁極歯、３８
は弾性片である。 FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
Figure 2 is a cross-sectional view of the main part of the same as above, Figures 3a and b are a cross-sectional view of the same and a plan view of the main part, respectively, Figure 4 is a cross-sectional view of the main part of the same in the assembly process, and Figure 5 is the main part of the main part. FIG. 2 is a cross-sectional view of essential parts of the step motor according to the invention. 10 is a housing, 21 is a rotating shaft, 22a, 2
2b is a rotor disk, 32a, 32b are yokes, 3
3a ₁ , 33b ₁ are first yoke element bodies, 33a ₂ ,
33b ₂ is a second yoke body, 34a and 34 are coils, 35 ₁ and 35 ₂ are peripheral walls, 37 is a magnetic pole tooth, and 38
is an elastic piece.

Claims

[Scope of utility model registration request]

A housing, a pair of rotor disks whose circumferences are magnetized with multiple poles so that the polarities alternate in the circumferential direction, and which are mounted spaced apart in the axial direction of the rotating shaft so as to co-rotate with the rotating shaft. , a pair of yokes that are fixed at fixed positions in the housing and have a large number of magnetic pole teeth formed on both sides of the circumference of each rotor disk in the thickness direction, each facing the magnetic poles of the rotor disk, and the thickness of each rotor disk. In a step motor equipped with a pair of coils that excite the magnetic pole teeth of opposing yokes on both sides of the direction to different polarities, each yoke includes a first yoke element body disposed in the thickness direction of the rotor disk, and a first yoke body disposed in the thickness direction of the rotor disk. The first yoke element body and the second yoke element body are each formed with a peripheral wall that protrudes in the same direction as the magnetic pole teeth over the entire circumference of the outer periphery, and the peripheral wall of the first yoke element body The second yoke element body is fitted into the first yoke element body in such a manner that the outer peripheral surface of the peripheral wall of the second yoke element body is in contact with the inner surface of A plurality of elastic pieces are formed by cutting and bending and project from the outer peripheral surface of the element body and come into elastic contact with the inner peripheral surface of the peripheral wall of the first yoke element body, and the elastic pieces protrude in the same direction as the peripheral wall of the first yoke element body. motor.