JPH0510328Y2 - - Google Patents

Description

[Detailed explanation of the idea] 〔Technical field〕 This invention relates to a polarized electromagnet device.

[Background technology]

There are various types of polar electromagnetic devices. For example, as shown in FIG.
Another example includes an E-shaped electromagnetic block 24 in which an iron core 23 around which a coil 22 is wound is magnetically connected. Such an electromagnetic device includes an armature block 34 in which two magnetic pieces 31 and 32 sandwich a permanent magnet 33 from both ends in the direction of magnetization, forming a U-shape. By moving this armature block 34 in parallel in the forward and reverse directions A and B, for example, the contacts are opened and closed.

In the conventional electromagnet device, when the armature block 34 moves in the forward and reverse directions, the yoke 21
Both tips of the magnetic material pieces 31 and 32 were in contact with each other on large surfaces. However, due to variations in the dimensions of the yoke and the magnetic material pieces, for example, one end of the yoke 21 should be as shown by the dashed line in the figure, but is instead shown as a solid line. The armature block 34 may not be in surface contact with the tip of the yoke, and the armature block 34 may be tilted. The inclination of the armature block 34 is not constant but varies. For this reason,
A problem arises in that the contact position of the armature block 34 with the yoke 21 is not stable, and the stroke of the armature block 34 varies. When such an electromagnetic device is combined with a switch or the like to form an electromagnetic relay, a problem arises in that the characteristics of the relay are not constant.

[Purpose of invention]

In view of the above, the object of this invention is to provide an electromagnet device in which the forward and reverse movement of the armature block is stabilized.

[Disclosure of invention]

In order to achieve the above object, this invention has a central magnetic pole part and opposing magnetic pole parts facing each other across the central magnetic pole part, and these opposing magnetic pole parts are located ahead of the central magnetic pole part, and the coil an electromagnetic block which has a polarity opposite to that of the central magnetic pole when excited by
and an electromagnet device including an armature block in which two pieces of magnetic material sandwich a permanent magnet from both ends in the direction of magnetization, wherein the opposing magnetic pole portions include inwardly directed portions that protrude inwardly so that the opposing magnetic pole portions approach each other. The armature block faces between the inward portions on one end side of the two magnetic material pieces, and sandwiches the central magnetic pole portion on the other end side of the two magnetic material pieces, The gist of the electromagnet device is an electromagnet device characterized in that either one of the facing surfaces of the other end portion and the central magnetic pole portion is provided with a protruding portion directed toward the other.

This idea will be explained in detail below.

In the electromagnet device according to this invention, the opposing magnetic pole portions are located further forward than the central magnetic pole portion, and have inward portions that partially protrude toward each other. The armature block faces between the inwardly directed parts on one end side of the two magnetic pieces, and
The other ends of the two magnetic pieces sandwich the central magnetic pole part. A protrusion toward the other end is provided on either the other end side of the magnetic piece or the opposing surface of the central magnetic pole.

Therefore, when the armature block operates normally and is attracted to one of the opposing magnetic pole parts, the outer end of one of the two magnetic pieces comes into contact with the inner part of the armature block, and the two magnetic pieces The inner side of the other end of the piece and the central magnetic pole part abut each other at one of the protrusions and the other side surface.

Also, when the armature block operates in reverse and is attracted to the other of the opposing magnetic poles, the armature block will
The outside of the other end of the two magnetic pieces comes into contact with the inward part, and the inside of the other end of the two magnetic pieces and the center magnetic pole part touch each other between the protrusion of one of them and the side of the other side. come into contact with

When the armature block moves in either the forward or reverse direction, the contact position between the armature block and the opposing magnetic pole part is specified at the tip position of the inward part, and the contact position between the armature block and the central magnetic pole part is specified. It is specified by the tip position of the protrusion. In other words, the contact between the armature block, the opposing magnetic pole part and the central magnetic pole part is
The contact is limited to a narrow area of the inward portion or the protruding portion, resulting in a state close to so-called point contact.

This contact state does not change even if the armature block is slightly tilted. In other words, unless the armature block is extremely tilted to the point where the inward portion or the protruding portion comes into contact, the contact position between the armature block and the opposing magnetic pole portion and the central magnetic pole portion remains unchanged, and the armature block The stroke becomes stable.

Further, the inward portion and the central magnetic pole portion, which come into contact with each other when the armature block moves in the forward and reverse directions, are arranged to form a triangle, and each is located at one end of the two magnetic pieces of the armature block. Since the armature block and the other end are in contact with each other, the operation of the armature block becomes stable.

Therefore, in the electromagnet device of this invention, even if there are variations in component dimensions, the contact position of the armature block is stable (or almost stable), and the stroke is always (or almost) stable. ing.

This invention will be explained in detail below with reference to drawings showing embodiments thereof.

FIG. 1 shows a first embodiment of the electromagnet device of this invention. As shown in the figure, this electromagnet device includes an electromagnet block 1 and an armature block 2.

The electromagnetic block 1 has an iron core 5 magnetically connected to a yoke 3 which is generally C-shaped in plan, so that the electromagnetic block 1 has an approximately E-shape in plan. The coil 4 is wound around a coil frame 6, and the coil frame 6 is wound around the iron core 5, thereby ensuring insulation from the iron core 5. The yoke 3 extends longer than the iron core 5.
The tip of the iron core becomes the central magnetic pole 5a, and both tips of the yoke 3 serve as opposing magnetic poles. Both distal ends of the yoke 3 have inwardly directed parts 3a and 3b extending inwardly so as to approach each other at their most distal ends. These inward portions 3a, 3b and the central magnetic pole portion 5a are arranged to form a triangle (indicated by a chain line in the figure). The central magnetic pole part and the opposing magnetic pole part are the coil 4
It has opposite polarity due to excitation of .

Length M extending inward of the inward parts 3a, 3b
is not particularly limited, but may have a minute length, for example, preferably about 0.1 mm. If this is the case,
The suction power remains almost the same. If the length M is too small, the effect of providing the inward portion may not be obtained, and if it is too large, the size of the electromagnet device may become too large. Further, it is preferable that the inward portion is located further away from the central magnetic pole portion because the inclination of the armature block becomes smaller.

The armature block 2 has two magnetic pieces 11, 1
2 is at one end thereof, and the permanent magnet 13 is sandwiched from both ends in the direction of magnetization, forming a generally U-shape. This armature block 2 consists of two magnetic pieces 11 and 12.
Inward facing part 3 on one end side (U-shaped middle side)
a, 3b, and the center magnetic pole portion 5a is sandwiched between the other end sides of the two magnetic pieces 11 and 12 (the tip side of the opposite side that is U-shaped).

The magnetic pieces 11 and 12 are arranged substantially parallel to each other, and the ends 11a and 12a on both sides of the central magnetic pole part 5a are bent inward so as to approach each other, and the tips thereof are made of magnetic material. Piece 11,
The end portions 11a and 12a are protrusions.

When the magnetization direction of the permanent magnet 13 of the armature block 2 is as shown in FIG. 1, the coil 4 is energized to make both ends of the yoke 3 the S pole and the central magnetic pole part 5a the N pole. 1, the armature block 2 moves in the direction of arrow A, as shown in FIG. That is, the armature block 2 contacts the inward portion 3a on the outside of one end of the magnetic piece 11, and the inner tip of the other end 12a of the magnetic piece 12
It comes into contact with the side surface of the central magnetic pole portion 5a.

When the excitation polarity of the coil 4 is reversed, the armature block 2 moves in the direction of arrow B, and the armature block 2
The outer side of one end of the magnetic piece 12 abuts the inward portion 3b, and the inner tip of the other end 11a of the magnetic piece 11 abuts the side surface of the central magnetic pole portion 5a.

In this way, when the armature block 2 is operated in either the forward or reverse direction, the outer ends of the magnetic pieces 11 and 12 make approximately point contact with the inwardly directed parts 3a and 3b, and the magnetic pieces 11 , 12's other end 11a,
The inner side of 12a makes approximately point contact with the side surface of central magnetic pole portion 5a. Point contact here refers to introverted part 3
This means contact in a very narrow and limited range, such as the tips of the other ends 11a and 12a, and does not mean only point contact in a mathematically strict sense.

From the above, even if the armature block 2 is slightly tilted, as long as the inward portions 3a, 3b or the other end portions 11a, 12a are in contact, the contact position between the armature block 2 and the yoke 3 is almost the same. The stroke of the armature block 2 remains stable.

It should be noted that if either the inward portions 3a and 3b or the other end portions 11a and 12a of the magnetic pieces 11 and 12, that is, the protruding portions, are not present, one end outside of the armature block 2 and the opposing magnetic pole portion or the armature There is a possibility that the contact position between the inner side of the other end of the block 2 and the center magnetic pole portion 5a changes, and the object of the present invention cannot be fully achieved. Therefore, the introvert part 3a,
3b and the structure of the other end portions 11a and 12a,
It is important to have both configurations.

As mentioned above, when the armature block 2 moves forward or backward, the positions where it contacts the inward parts 3a, 3b and the central magnetic pole part 5a are in the operating direction of the armature block 2 (horizontal direction in the figure). Since the armature block 2 is deviated in the direction perpendicular to that direction (vertical direction in the figure), the contact position of the armature block 2 does not change much even if the dimensions of the parts vary, and the stroke is stabilized. . Therefore, the forward and reverse operations of the armature block 2 are stabilized. Ideally, the deviation in the orthogonal directions is equal to the full length of the two magnetic pieces of the armature block, but the invention is not limited to this.

Next, the inward part of the yoke may be one in which both ends of the C-shaped yoke are bent inward so that the end faces face each other, as shown in FIG. Not exclusively. For example, the second
As shown in the figure, both ends of the yoke may be bent diagonally inward to form inward parts 3a and 3b, and as shown in Fig. Inward facing parts 3a, 3b
There is no particular limitation.

Further, in the embodiment, the other end side of the magnetic material pieces 11 and 12 is bent to form the other end 11 which becomes the protruding part.
a, 12a, but the shape and structure of the protrusions formed on the magnetic pieces 11, 12 are not limited as long as they can perform the same function.

Furthermore, the protrusions are not only provided on the magnetic pieces 11 and 12, but also on the central magnetic pole part 5 that comes into contact with the protrusions.
Even if it is provided on the a side, the same effect can be achieved. For example, as shown in FIG.
1 and 12 are formed parallel to each other,
It is also possible to use an iron core 5 whose tip is T-shaped, and to provide a wing-shaped protrusion extending to both sides at the tip of the central magnetic pole portion 5a, and to abut the side surfaces of the magnetic pieces 11 and 12 on this protrusion. , the same effect as above can be achieved. In this case, as shown in FIG. 4, if both wings of the central magnetic pole part 5a are triangular, the contact between the protruding part and the magnetic pieces 11, 12 becomes closer to a point contact, and the contact between the magnetic pieces 11, 12 becomes closer to a point contact. Since the contact position is more specified, the above effect is enhanced.

In addition, in FIGS. 1 to 5, the same numbers and symbols are given to the same parts.

The electromagnet device according to this invention has been described above as having an E-shaped electromagnet block and a U-shaped armature block. When the electromagnet block and the armature block are formed as described above and combined as described above, leakage of magnetic flux from the electromagnet device can be reduced and the electromagnet device can be made compact.

Note that this invention is not limited to the above embodiments.

In the embodiment described above, the yoke is C-shaped, the iron core is I-shaped, and the whole is E-shaped, but the shape of the electromagnetic block is not limited to these. There are no particular limitations on the shape or combination of the magnetic path components that magnetically connect the central magnetic pole portion and the opposing magnetic pole portions. The central magnetic pole part is
It is not limited to the tip of the iron core, and may be, for example, the tip of the yoke. The opposing magnetic pole portions are not limited to both ends of the yoke, and may be, for example, two ends of the core. Although the yoke and the iron core are formed separately and integrated by press-fitting, caulking, etc., they may be formed integrally from the beginning. Each magnetic piece of the armature block,
Although the inward portions of the opposing magnetic pole portions and the central magnetic pole portion are literally in contact with each other, they may also be in contact with each other through a permanent gap. The electromagnetic device of this invention can be formed as either a latching type or a single stable type. The forward and reverse movement of the armature block is not limited to strict parallel movement.

[Effect of idea]

As seen above, the electromagnet device according to this invention has opposing magnetic pole parts located further ahead than the central magnetic pole part, and also has inward parts that protrude inward so as to approach each other. , an armature block faces between the inwardly directed parts on the integrated part side of the two magnetic pieces, and sandwiches the central magnetic pole part on the other end side of the two magnetic pieces; Since a protrusion toward the other is provided on either the opposing surfaces of the end side and the central magnetic pole, the operating position (abutting position) of each armature block is stable when the armature block operates in the forward and reverse directions. However, the stroke is always constant.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional plan view of the entire first embodiment;
2 to 5 are plan views of essential parts of the second to fifth embodiments, respectively, and FIG. 6 is a partially sectional plan view showing an example of the prior art. DESCRIPTION OF SYMBOLS 1... Electromagnet block, 2... Armature block, 3... Yoke, 3a, 3b... Inward part, 4...
...Coil, 5...Iron core, 5a...Central magnetic pole part, 1
1, 12...Magnetic material piece, 11a, 12a...Protrusion part, 13...Permanent magnet.

Claims (1)

[Claims for Utility Model Registration] 1. It has a central magnetic pole portion and opposing magnetic pole portions facing each other across the center magnetic pole portion, and these opposing magnetic pole portions are located further forward than the central magnetic pole portion, and when the coil is excited, the central magnetic pole portion is In an electromagnet device comprising an electromagnetic block having a polarity opposite to that of the magnetic pole part, and an armature block in which two magnetic pieces sandwich a permanent magnet from both ends in the direction of magnetization, the opposing magnetic pole part has an inward portion that protrudes inward so as to approach each other, and the armature block faces between the inward portions on one end side of the two magnetic pieces, and the other end of the two magnetic pieces An electromagnet device, characterized in that the central magnetic pole part is sandwiched between the two ends thereof, and a protruding part directed toward the other is provided on either the other end side of the magnetic material piece or the opposing surface of the central magnetic pole part. 2. The electromagnetic block has an iron core magnetically connected to a yoke that is generally C-shaped in plan, and has an approximately E-shape in plan, with the tip of the iron core serving as the central magnetic pole, and both tips of the yoke The armature block has an inward portion that extends longer than the tip of the iron core and serves as an opposing magnetic pole, and protrudes inward so that both tips of the yoke approach each other. The permanent magnet is sandwiched from both ends in the direction of magnetization on one end side, forming a generally U-shape in plan, and one end side of the two magnetic material pieces faces between the inward portions, and the other end of the two magnetic material pieces The electromagnet device according to claim 1, wherein the sides sandwich the central magnetic pole part.