JPH0432730Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an electromagnetic device operated by input of alternating current.

[Background technology]

Conventionally, an AC electromagnet device as shown in FIG. 3 has been used. As shown in Figure 3, iron core 51
The head is divided into two parts, and a shaded coil 52 made of a non-magnetic material such as a copper ring is fixed to one half by caulking or press-fitting, and a yoke 53 extending opposite to the iron core 51 is attached to the bottom of the iron core 51 by caulking or the like. I was connected. Further, an armature 54 is provided at the tip of the yoke 53 so that the front end of the armature 54 can rotate toward and away from the head end surface of the iron core 51, and the rear end of the armature 54 is fixed in one direction by a spiral spring 55. The main coil 56 was supported so that a force was exerted thereon, and operated by energizing and de-energizing the main coil 56. However, when attaching and fixing the darkening coil 52, the head end face of the iron core 51 (the part that becomes the magnetic pole) may be damaged, or the darkening coil 52 on the head of the iron core 51 may be damaged.
Without it, the end face of the head was warped and deformed. For this reason, the effect of providing the shade removal coil 52 is impaired, and chattering occurs, which is a major cause of generating whine and causing unstable operation.

[Purpose of invention]

In view of the above-mentioned circumstances, the present invention provides an AC electromagnet device with stable characteristics and less whirring.

[Disclosure of invention]

The present invention is a yoke in which a second L-shaped yoke with a short magnetic pole and main body is inscribed in a first L-shaped yoke with a long magnetic pole and main body, and both magnetic poles face each other, and a coil is wound around both main bodies. and an armature whose one end engages with at least the end of the main body of the first L-shaped yoke and into which the shaded coil is fitted into the other end, and the end faces of both magnetic pole parts are arranged opposite to the plate surfaces of the armature on both sides of the shaded coil. This is an alternating current electromagnet device with stable characteristics and less whirring.

An embodiment of the present invention will be described below based on the drawings.

As shown in FIG. 1, the AC electromagnet device of the present invention consists of a yoke 1 around which a coil 3 is wound, and an armature 2 engaged with the yoke 1.

The yoke 1 has a second L-shaped yoke 5 made of a magnetic pole part 5a and a short main body part 5b inscribed in a first L-shaped yoke 4 made of a magnetic pole part 4a and a long main body part 4b, and both magnetic pole parts 4a and 5a are made to face each other. Both the main body parts 4 are connected by the coil frame 6 around which the coil 3 is wound.
b and 5b are engaged and fixed.

The amateur 2 has one end 2a at least
It is hinged to the main body end 4c of the 1L type yoke 4, and can freely rotate around that part as a fulcrum (arrow A,
direction B), and consists of a single plate with an L-shape as a whole. In a case like this example, amateur 2
is subjected to a rotational force in the direction of arrow B by a suitable means such as a spring.

Incidentally, a substantially square-shaped shading coil 7 is fitted into the other end 2b of the armature 2 and caulked or press-fitted.

Further, the armature inner surfaces 2c and 2d on both sides of the shaded coil 7 are arranged opposite to the end surfaces 4d and 5d of the magnetic pole parts 4a and 5a. Since the two magnetic pole end faces 4d and 5d are obtained in this way, the area thereof can be made much larger than that of the conventional single magnetic pole, and thus the magnetic resistance can be reduced.

The shapes of the armature 2 and the first L-shaped yoke 4 are as follows.
If one end 2a of the armature 2 is hingedly engaged with the main body end 4c of the first L-shaped yoke 4, the second
As shown in the figure, the armature A is a flat plate, and the yoke B is approximately U-shaped by bending the main body portion 4b toward the magnetic pole portion 4a.
The structure may be configured as follows, and is not limited to this embodiment.

When an alternating current is passed through the coil 3 of the AC electromagnet device shown in this embodiment, the magnetic flux generated by the coil 3 creates an attractive force between the magnetic pole end surface 4d and the armature inner surface 2c, and between the magnetic pole end surface 5d and the armature inner surface 2d. As a result, the armature 2 rotates in the direction of arrow A, and the armature inner surfaces 2c and 2d abut against the magnetic pole end faces 4d and 5d, respectively. Although the input to the coil 3 is alternating current, the attraction force is smoothed by the shaded coil 7, and this state is kept stable during this excitation. In the AC electromagnet device of this embodiment, since the shaded coil 7 is fitted into one end 2a of the armature 2, when it is fixed by caulking or press-fitting, a caulking load is applied to the inner surfaces 2c and 2d of the armature, which are the surfaces facing the magnetic pole parts. Since the inner surfaces 2c and 2d of the armatures are not damaged or deformed such as distortion, a stable suction state with less whirring can be easily formed.

[Effect of idea]

As described above, the present invention is based on the first L
Since the magnetic pole end faces of the yoke and the second L-shaped yoke are provided, no load is applied to the magnetic pole surface when installing and fixing the shaded coil as in the conventional case, so there is no damage to the magnetic pole surface. In addition, there is no deformation such as distortion, and it is possible to easily construct an AC electromagnet device with stable operation and less whirring. In addition, since the end face of the magnetic pole part is made up of the end faces of two yokes, the area of the magnetic pole can be made extremely large compared to conventional ones, and the magnetic resistance can therefore be made small, so that an AC electromagnet device with a large attractive force can be constructed. Beneficial.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 2 is a perspective view showing another embodiment. FIG. 3 is a side view showing a conventional example. 1... Yoke, 2... Amateur, 2a... One end, 2b... Other end, 2c, 2d... Amateur plate surface, 3... Coil, 4... First L-shaped yoke, 4a,
5a... Magnetic pole part, 4b, 5b... Main body part, 4c...
...End of main body part, 4d, 5d...End face of magnetic pole part, 5...
...2nd L-shaped yoke, 7...shading coil.

Claims (1)

[Scope of utility model registration request] A yoke is formed by inscribing a second L-shaped yoke with a short magnetic pole and main body into a first L-shaped yoke with a long magnetic pole and a main body, with both magnetic poles facing each other, and a coil wound around both main bodies, and one end of the yoke. It comprises an armature that engages at least an end of the main body part of the first L-shaped yoke and into which a shading coil is fitted into the other end, and the end faces of both magnetic pole parts are arranged opposite to the armature plate surfaces on both sides of the shading coil. An AC electromagnet device featuring: