JPH04123506U - electromagnet device - Google Patents

Abstract

(57) [Summary] [Purpose] The first and second magnetic pole plates and the permanent magnet can be connected without generating burrs at the corners of the rounded bent portion of the second magnetic pole plate and without enlarging the shape. are fixed with high dimensional accuracy by integral molding. [Structure] The second magnetic pole plate 2 is provided with a stepped portion 2g in the thickness direction of the other piece 2c on the other side 2c of the rounded bent portion 2b. Therefore, when performing integral molding in the molding part 4, the outer surface 2f of the other piece 2c of the second magnetic pole plate 2 and the outer surface of the molding part 4
4a are located on the same plane, the above step part
2g is sufficiently filled with the molding material, no burrs are generated at the corners of the rounded bent portion 2b, and the outer surface 4a of the molded portion 4 does not protrude from the outer surface 2f of the other piece 2c. Therefore, the shape does not become large and the first and second
The magnetic pole plates 1, 2 and the permanent magnet 3 can be fixed together with high dimensional accuracy by integral molding.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to an electromagnet device used in electromagnetic relays and the like.

0002

[Conventional technology]

A first conventional example of this type of electromagnet device is shown in FIG.

[0003]This device includes a flat first magnetic pole plate A, one piece _B1 facing the first magnetic pole plate A, and a bent portion _B2 whose outside is rounded with respect to the first magnetic pole plate _B1 . A second magnetic pole plate B has a second magnetic pole plate B having _the other side _B3 bent with A permanent magnet C interposed so as to magnetize the magnetic pole plates with different polarities, one piece _B1 of the first magnetic pole plate A and the second magnetic pole plate B, and the permanent magnet C are integrally molded with a molding material. The proximal end E2 is rotatable so that the fixed molded part D and the distal end _E1 selectively abut one of _the other ends between the opposing first and second magnetic pole plates A and B. It includes a supported armature E and a coil F wound around the armature E.

[0004] In the integral molding of the molded part D, the mold that comes into contact with the outer surface _B4 of the other piece _B3 of the second magnetic pole plate B is flat, so that the shape after the integral molding is The outer surface B ₄ of the other piece B ₃ and the outer surface D ₁ of the molded part D are located on the same plane.

Next, a second conventional example is shown in FIG. This product differs from the first conventional example only in the shape of the molded portion D. That is, in the shape after integrally molding one piece B ₁ of the first magnetic pole plate A and the second magnetic pole plate B and the permanent magnet C, the outer surface D ₁ of the molded part D is different from that of the first conventional example. As such, it is not located on the same plane as the outer surface _B4 of the other piece _B3 of the second magnetic pole plate B, but protrudes.

[0006]

[Problem that the idea aims to solve]

In the above-described conventional electromagnetic device, the armature E has a tip end E ₁ placed between the first magnetic pole plate A and one piece B ₁ of the second magnetic pole plate B and one of the two magnetic pole plates. Since they selectively abut, the stroke of the armature E is determined by the above-mentioned distance between the opposing sides. Therefore, since this distance between opposing faces is an important dimension, one piece _B1 of the first magnetic pole plate A and the second magnetic pole plate B and the permanent magnet C are positioned relative to each other by integrally molding the molded part D. It is designed to stick.

By the way, when performing this integral molding, the second magnetic pole plate B is bent so that the bent portion _B2 of one piece _B1 and the other piece _B3 is curved on the outside. As shown in FIG. 3, when the outer surface D ₁ of the molded part D is located on the same plane as the outer surface B ₄ of the other piece B ₃ of the second magnetic pole plate B as in the conventional example No. 1, as shown in FIG. The molded part D becomes thinner at the corner of the rounded bent part B ₂ and burrs D ₂ are generated, and these burrs D ₂ fly off and cause trouble in the operation of the armature E or damage the electromagnetic device. It may adhere to the contacts of electromagnetic relays constructed using it, resulting in poor contact.

[0008]The second conventional example is designed to prevent the occurrence of the burr _D2 , and in order to prevent the molded part D from becoming thin at the corners of the rounded bent part _B2 , the outer surface D of the molded part D is ₁ is made to protrude beyond the outer surface _B4 of the other piece _B3 of the second magnetic pole plate B. However, in this case, the overall length is longer than that of the first conventional example due to the protrusion caused by the molded portion D.

[0009] This invention was created in view of the above reasons, and its purpose is to The shape can be maintained without creating burrs at the corners of the rounded bends of the magnetic pole plates. By integrally molding the first and second magnetic pole plates and the permanent magnet, the dimensions can be reduced without increasing the size. An object of the present invention is to provide an electromagnetic device that can be fixed with high precision.

0010

[Means to solve the problem]

In order to solve the above problems, the electromagnet device of the present invention has a flat first magnetic pole. a plate, one piece facing the first magnetic pole plate, and the outside of the other piece having a rounded shape. a second magnetic pole plate having a bent portion and the other bent piece, and both magnetic pole plates facing each other. a permanent magnet interposed between them so as to magnetize each magnetic pole plate to a different polarity; A molded part in which the magnetic pole plate of No. 2 and the permanent magnet are integrally molded and fixed using a molding material, and a tip. The proximal end portion is configured such that the base portion selectively abuts one of the magnetic pole plates between the opposing magnetic pole plates. It has a rotatably supported armature and a coil wound around the armature. In the electromagnet device, on the other side of the rounded bent portion of the second magnetic pole plate, the other side is It has a structure in which a stepped portion is provided in the thickness direction of the piece.

[0011]

[Effect]

According to the electromagnet device of the present invention, the second magnetic pole plate has the other side of the rounded bent portion. On the side, there is a step in the thickness direction of the other piece, so the molded part can be integrally formed. When doing so, the outer surface of the other piece of the second magnetic pole plate and the outer surface of the molded part are on the same plane. Even if the molding material is positioned at , burrs may occur at the corners of the rounded bent portion of the second magnetic pole plate as in the first conventional example. Since there is no edge and the outer surface of the molded part does not protrude from the outer surface of the other piece, Unlike the conventional example No. 2, the shape does not become large, and the first and second magnetic pole plates are permanently connected. The magnet can be fixed with high dimensional accuracy by integral molding.

0012

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

[0013] 1 is the first magnetic pole plate, which is made of magnetic material and is shaped like a flat plate. be.

[0014] 2 is a second magnetic pole plate, which is made of magnetic material and has one piece 2a facing the first magnetic pole plate 1; , the other side is bent with a bent part 2b having a radiused outer side relative to the one side 2a. The other piece 2c has a central piece 2d which is bent parallel to the one piece 2a. and the other end piece 2e which is bent from the center piece 2d to be parallel to the other piece 2c. It is formed. Then, on the other piece 2c side of the rounded bent portion 2b, the other piece 2c is The stepped portion 2g, which has a straight portion in the plate thickness direction, cannot press a mold formed into a similar shape. It is formed by

[0015] 3 is a permanent magnet, which is placed between the opposing pieces 2a of the first magnetic pole plate 1 and the second magnetic pole plate 2. The magnetic pole plates are interposed at one end thereof so as to be magnetized to different polarities.

[0016] 4 is a molding part where one piece 2a of the first magnetic pole plate 1 and second magnetic pole plate 2 and a permanent magnet are attached. 3 are integrally molded using a molding material such as synthetic resin so that they are positioned and fixed to each other. It is formed to surround the permanent magnet 3. In this integral molding, the second The mold that comes into contact with the outer surface 2f of the other piece 2c of the magnetic pole plate 2 is flat, and therefore The shape after integral molding is such that the outer surface 2f of the other piece 2c and the outer surface 4a of the molded part 4 are on the same plane. It is positioned at the top.

[0017] 5 is an armature made of magnetic material in the shape of a flat plate, and designates coil 6, which will be described later. By excitation in the direction, the tip portion 5a is connected to the first magnetic pole plate 1 and the second magnetic pole plate 2. The proximal end portion 5b is arranged so as to selectively abut one of the other end portions between opposite sides of the one piece 2a. It is rotatably supported at the end of the other end piece 2e of the second magnetic pole plate 2.

[0018] 6 is a coil, which is wound around the armature 5 through a coil frame 6a. be.

[0019] Next, the operation of this electromagnet device will be explained. Now, Figure 1 shows the state where coil 6 is not energized. The magnetic flux of the permanent magnet 3 is distributed between the first magnetic pole plate 1, the armature 5, and the second magnetic pole plate 2. The tip 5a of the armature 5 is brought into contact with the first magnetic pole plate 1 so as to form a closed magnetic path through the ing. Here, the coil 6 is excited in the specified direction so that the tip 5a of the armature 5 becomes the N pole. By doing so, one piece 2a of the first magnetic pole plate 1 and the second magnetic pole plate 2 is attached to the permanent magnet 3. Since they are magnetized to N and S poles, the polarization occurs due to attraction and repulsion. The tip end 5a of the child 5 is inverted and comes into contact with one piece 2a of the second magnetic pole plate 2. Next, carp When magnet 6 is de-energized, the magnetic flux of permanent magnet 3 forms a closed magnetic path in the same way as above. The tip end 5a of the armature 5 comes into contact with the first magnetic pole plate 1 and returns to the state shown in FIG.

[0020] This electromagnetic device is then used to create a contact that opens and closes in response to the operation of armature 5. When installed, an electromagnetic relay can be configured.

[0021]

[Effect of the idea]

In the electromagnet device of the present invention, the second magnetic pole plate is located on the other side of the curved portion. Since there is a step in the thickness direction of the other piece, it is integrally formed in the molding part. When the outer surface of the other piece of the second magnetic pole plate and the outer surface of the molded part are located on the same plane. Even if it is done, the step part will be sufficiently filled with the molding material, so the first This eliminates the occurrence of burrs at the corners of the rounded bent portion of the second magnetic pole plate as in the conventional example. Moreover, since the outer surface of the molded part does not protrude from the outer surface of the other piece, the second follower Unlike the previous model, the shape does not become large, and the first and second magnetic pole plates and permanent magnets can be fixed with good dimensional accuracy by integral molding.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional front view showing an embodiment of the present invention.

FIG. 2 is a partial perspective view of the same as above.

FIG. 3 is a cross-sectional front view showing a first conventional example.

FIG. 4 is a cross-sectional front view showing a second conventional example.

[Explanation of symbols]

1 First magnetic pole plate 2 Second magnetic pole plate 2a One piece 2b Bend part 2c the other side 2g stepped section 3 permanent magnet 4 Molding section 5 Armature 5a Tip 5b Proximal end 6 coils

Claims (1)

[Scope of utility model registration request] Claim 1: A first magnetic pole plate in the form of a flat plate, one piece facing the first magnetic pole plate, and the other piece bent so as to have a bent portion whose outer side forms a radius with respect to the one piece. and the second having
a permanent magnet interposed between the opposing magnetic pole plates so as to magnetize the respective magnetic pole plates to different polarities, and a first and a second magnetic pole plate.
A molded part in which the magnetic pole plate and a permanent magnet are integrally molded and fixed using a molding material, and a base end part that is rotatable so that the tip part selectively abuts one of the two magnetic pole plates between the opposing magnetic pole plates. In an electromagnetic device having an armature supported by an armature, and a coil wound around the armature, on the other side of the rounded bent portion of the second magnetic pole plate, a coil is attached in the thickness direction of the other piece. An electromagnet device characterized by having a stepped portion.