JP2000077230A - Electromagnetic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain suction for a contact pole and an iron core as initial by designed. SOLUTION: This electromagnetic device is provided with an electromagnet 1, in which a coil is wound around an iron core 14 in a state that a winding space is partitioned by a bobbin 11 made of mold materials which are put through the iron core 14, a yoke 2 whose one edge is fixed to the top end of the iron core 14, and a contact pole 4 constituting a closed magnetic circuit in an abutting state with the other edge of the yoke 2 when this is attracted by the edge part of the iron core 14. This electromagnetic device 4 is constituted such that an energizing spring 3 for the contact pole 4 for making the contact pole 4 abut against the yoke 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic device such as an electromagnetic relay.

[0002]

2. Description of the Related Art Conventionally, as this type of electromagnet device, FIG.
15 to FIG. 15 exist. This is an electromagnetic relay including an electromagnet A, a yoke B, and an armature C.

An electromagnet A is composed of a coil bobbin A ₁ , a coil A ₂ ,
Consisting of iron core A _3. Coil bobbin A ₁ is made of molding material, on both ends of the coil winding portion A ₄ wound around the coil A _2, is provided a flange portion A _5, A ₆ partitioning the winding space of the coil A ₂ .
Further, the coil bobbin A _1, from the one end flange portion A _5, the extending portion A ₈ for deriving the coil terminals A ₇ connected to the coil A ₂ is extended. Iron core A ₃ is a flange portion A ₉ is provided at its proximal end, the coil winding portion A ₄ and Ryotsuba unit A ₅ of the coil bobbin A _1, A
₆ penetrates.

[0004] yoke B has one end portion is fixed to the distal end portion of the iron core A _3. Armature C is extended portion of the coil bobbin A ₁
Is disposed between the flange portion A ₉ of the projecting portion A ₁₀ and the iron core A ₃ projecting from the A _8, the magnetic flux coil A ₂ of the electromagnet A is energized through the iron core A ₃ occurs are attracted to the flange portion a ₉ is a proximal end portion of the iron core a _3, it forms a closed magnetic circuit in the contact between the other end of the yoke B.

[0005]

In the conventional electromagnetic device described above in which [0005] armature C, the coil A ₂ of the electromagnet A is excited, the magnetic flux is generated through the iron core A _3, the iron core A ₃ is a base end portion is attracted to the flange portion a _9, although constituting a closed magnetic circuit in the contact between the other end of the yoke B, the extending portion a ₅ of the coil bobbin a ₁
Since only is disposed between the flange portion A ₈ of the projecting portion A ₁₀ and the iron core A _3, magnetic flux coil A ₂ of the electromagnet A penetrates the iron core A ₃ not be energized If not, yoke B
Is not necessarily in contact with the yoke B, and the coil A _{2 of the} electromagnet A may be excited to be attracted to the flange A ₉ of the iron core A ₃ to be in contact with the yoke B for the first time. possible.

As described above, if the coil A ₂ of the electromagnet A is excited and is attracted to the flange A ₉ of the iron core A ₃ , the coil bobbin A ₁ will not contact the yoke B for the first time.
Of causes occurring positional deviation between the flange portion A ₉ of the projecting portion A ₁₀ and the iron core A _3, due to the positional deviation, armature C and iron core A ₃
The suction operation may not be performed as originally designed.

The present invention has been made in consideration of the above points, and it is an object of the present invention to provide an electromagnet apparatus in which an attracting operation between an armature and an iron core is performed as originally designed. is there.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 is directed to an iron core in a state where a winding space is partitioned by a coil bobbin made of a molding material penetrating the iron core. An electromagnet having a coil wound thereon, a yoke having one end fixed to the distal end of the iron core, and a closed magnetic path in contact with the other end of the yoke when attracted to the base end of the iron core. And an urging spring for urging the armature so as to contact the yoke.

According to a second aspect of the present invention, in the first aspect, the biasing spring is made of metal.

According to a third aspect of the present invention, in the second aspect of the present invention, the biasing spring is mounted on a mounting portion provided on the coil bobbin, and the mounting portion is unique. It is.

According to a second aspect of the present invention, in the first aspect of the invention, the biasing spring is formed integrally with the coil bobbin from the same material.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. This electromagnet device is an electromagnetic relay, and includes an electromagnet 1, a yoke 2, an urging spring 3, an armature 4, and a base 5.

The electromagnet 1 includes a coil bobbin 11, a coil 12,
A coil terminal 13 and an iron core 14 are provided. Coil bobbin 11
Is made of a molding material, and as shown in FIGS. 2 and 3,
A coil winding portion 11c around which the coil 12 is wound in a state where the winding space is partitioned by flange portions 11a and 11b provided at both ends is provided. Specifically, the coil winding portion 11c
A pair of opposed portions 11d facing each other and a bridge portion 11e for bridging between the opposed portions 11d are connected to the coil 12 from an extended portion 11f formed in a U-shaped cross section and extended from one end flange portion. The coil terminal 13 is drawn out. The coil terminal 13 is formed integrally with the coil bobbin 11, and forms a coil block 20 together with the coil bobbin 11 and the coil 12. The iron core 14 is, as shown in FIG.
It is formed in the shape of a square bar having a flange 14a provided at its base end. The distal end is inserted into both flanges 11a and 11b of the coil bobbin 11 and penetrates both flanges 11a and 11b.

The yoke 2 is formed of a magnetic material into an L-shape having one piece 2a and the other piece 2b, and the tip of an iron core 14 penetrating through a through hole 2c provided in the one piece 2a. One end is fixed to the iron core 13 by spin caulking. This yoke 2
The iron core 13 with one end fixed to the iron core 14.
The other piece 2b having substantially the same size as that of the iron core 13 is positioned parallel to the iron core 13, and the other end is disposed adjacent to a flange 14a which is a base end of the iron core 14.

The biasing spring 3 is made of a thin metal plate and, as shown in FIG. 4, has a substantially U-shaped cross section comprising a central piece 3a and two wing pieces 3b, 3b extending from both sides of the base end of the central piece 3a. A biasing piece 3c formed having a mold portion and capable of biasing in a direction away from the central piece 3a extends obliquely from the tip of the central piece 3a to between the two wing pieces 3b, 3b. . This biasing spring 3
Is mounted such that a substantially U-shaped section is inserted into a single mounting portion 11g protruding from the extending portion 11f of the coil bobbin 11.

As shown in FIG. 5, the armature 4 is made of a magnetic material and is formed in a plate shape with one end side being thinner than the other end side, and the urging piece 3c of the urging spring 3 and the other end of the yoke 2 are formed. With the one end side disposed therebetween, the other end side is urged by the urging piece 3c of the urging spring 3 so as to contact the other end of the yoke 2. As will be described in detail later, when one end side of the armature 4 is attracted to the flange 14a, which is the base end of the iron core 13, the armature 4 forms a closed magnetic path in a state of contact with the other end of the yoke 2. The armature 4 is connected to the electromagnet 1,
The yoke 2 and the urging spring 3 constitute an electromagnet block 30.

The base 5 is made of a molding material. As shown in FIG. 7, an extension 5a extends from the main body to form a U-shaped section, so that the electromagnet block is formed.
A mounting section 5b for mounting the side 30 from the side is provided. As shown in FIG. 7, the base 5 is provided with a normally open fixed contact terminal 6 having a normally open fixed contact 6a at the distal end by simultaneous molding, and a normally closed fixed contact 7a at the distal end. The normally closed fixed contact terminal 7 is provided by press-fitting. Further, as shown in FIG.
Are provided by press fitting. This movable contact spring 8
As shown in FIG. 1, a normally-open movable contact 8a and a normally-closed movable contact 8b are provided at the front end thereof back to back.
A through hole 8c is provided near 8a, 8b. Further, as shown in FIG. 9, an insulating wall 5c is attached to the center of the side surface of the base 5, so that predetermined insulation is ensured.

As shown in FIG. 9, the card 9 is formed of a molding material into a substantially ladder shape having a window portion 9a, and hook portions 9b provided on both sides of a base end thereof are provided on both sides of one end of the armature 4. In the state where the pointed portion 9c of the tip is press-fitted into the through hole 8c of the movable contact spring 8 and is fixed therethrough, the protruding portion 5d protruding from the extended portion 5a of the base 5 is attached. The window 9a is fitted, and is attached to the extension 5a of the base 5 movably along the longitudinal direction.

As shown in FIG. 10, the case 10 is formed in a box shape with one surface opened by a molding material, is attached to the base 5 from the opening, and is sealed between the case 5 and the base 5.

Next, an assembling procedure of the above-described apparatus will be described. First, as shown in FIG. 2 and FIG.
Is formed integrally with the coil bobbin 11, and then the coil wire is wound to form the coil 12. Next, as shown in FIG. 4, the iron core 14 is moved from its distal end to both opposing portions 11d of the coil bobbin 11.
And along the bridge portion 11e to penetrate both flange portions 11a and 11b, and penetrate the tip of the iron core 14 through the through hole 2c of the one piece 2a of the yoke 2, and fix it by spin caulking, Next, the U-shaped section of the biasing spring 3 is attached to the mounting portion of the coil bobbin 11.
Attach to 11g.

Next, as shown in FIG. 5, the armature 4 is moved between the urging piece 3c of the urging spring 3 and the other end of the yoke 2 and the flange 14a which is the base end of the iron core 14. Insert and arrange. More specifically, one end of the armature 4 is opposed to a flange portion 14a which is a base end of the iron core 14, and the other end is urged by an urging piece 3c of an urging spring 3 to form the other end of the yoke 2. Arrange so that it abuts.

Next, as shown in FIG. 8, both fixed contact terminals
A movable contact spring 8 is press-fitted into a base 5 provided with
Subsequently, the electromagnet block 30 is mounted on the mounting portion 5b of the base 5, and the coil terminal 13 is bent into a predetermined shape.
Next, as shown in FIG. 9, the card 9 and the insulating wall 5c are mounted, and finally, the case 10 is attached to the base 5 for sealing.

Next, the operation of this embodiment will be described.
When the coil 12 is energized, the electromagnet 1 is excited and the armature
4 is such that one thin end thereof is attracted to the flange 14a of the iron core 14 and is in contact with the other end of the yoke 2 by being urged by the urging piece 3c of the urging spring 3. One end side is an iron core 14 so as to form a closed magnetic circuit, with the contact portion on the end side as a pivot point.
In the direction in which it comes into contact with the flange 14a. Then, the cards 9 hooked on both sides of one end of the armature 4
The movable contact spring 8 movable along the longitudinal direction of the extended portion 5a of FIG. 5 and fixedly penetrated by the pointed portion 9c is moved toward the normally open fixed contact terminal 6 against the spring force. The normally-open movable contact 8a of the movable contact spring 8 contacts the normally-open fixed contact 6a of the normally-open fixed contact terminal 6, and the normally-closed movable contact 8b of the movable contact spring 8 normally contacts. The closed fixed contact terminal 7 is separated from the normally closed fixed contact 7a.

When the current supply to the coil 12 is stopped, the armature
20 is rotated in the opposite direction to the above, since one end of the same is separated from the flange 14a which is the base end of the iron core 14,
The card 9 moves and returns in the direction opposite to the above-described direction due to the resiliency of the movable contact spring 8, and the normally open movable contact 8 a of the movable contact spring 8 moves to the normally open side of the normally open fixed contact terminal 6. The movable contact spring 8 separates from the fixed contact 6a.
The normally closed movable contact 8b contacts the normally closed fixed contact 7a of the normally closed fixed contact terminal 7.

In such an electromagnet apparatus, the armature 4
Is displaced by being attracted to the iron core 14 unlike the conventional example, which is always urged to contact the yoke 2 by the urging spring 3, unlike the conventional example, which may come into contact only when attracted. As a result, the suction operation with the iron core 14 is performed as originally designed.

The biasing spring 3 made of metal can increase the spring compliance and further increase the biasing force, so that the displacement is less likely to occur, and the suction operation with the iron core 14 is performed in the initial design. The effect of being able to be performed as described above can be further achieved.

A mounting portion provided on the coil bobbin 11
Since there is only one 11g, it is possible to reduce the time and effort required to mount the biasing spring on the three mounting portions 11g.

In this embodiment, the coil bobbin 11 is provided with only one mounting portion 11g. For example, when the urging spring 3 is mounted on the mounting portion 11g without much trouble, a plurality of mounting portions may be provided. It may be provided.

Next, a second embodiment of the present invention will be described below. This embodiment is basically the same as the first embodiment, except that the biasing spring 3 is integrally formed of the same material as the coil bobbin 11.

In this electromagnet device, similarly to the first embodiment, the effect that the suction operation with the iron core 14 is performed as originally designed can be further achieved. , The biasing spring 3 and the coil bobbin 11
Since it is integrally formed of the same material as above, the number of parts can be reduced.

Although the first and second embodiments are electromagnetic relays, they are not limited to electromagnetic relays.

[0032]

According to the first aspect of the present invention, the armature is urged to always contact the yoke by the urging spring, so that the armature may come into contact only when sucked. On the contrary, since no displacement occurs due to the displacement caused by the suction by the iron core, the suction operation with the iron core is performed as originally designed.

According to the second aspect of the present invention, the biasing spring made of metal can increase the spring compliance,
Since the urging force is further increased, the displacement is less likely to occur, and the effect of the invention described in claim 1 can be further exhibited.

According to the third aspect of the present invention, in addition to the effect of the second aspect of the present invention, since only one mounting portion is provided on the coil bobbin, it is troublesome to mount the urging spring on the mounting portion. Can be reduced.

According to a fourth aspect of the present invention, in addition to the effect of the first aspect, the number of parts can be reduced since the biasing spring is integrally formed of the same material as the coil bobbin.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a first embodiment of the present invention.

FIG. 2 is a perspective view of the same coil bobbin.

FIG. 3 is a perspective view of the same coil bobbin viewed from a different direction from FIG. 2;

FIG. 4 is a perspective view showing a state where an iron core is inserted into the coil bobbin according to the first embodiment.

FIG. 5 is a perspective view showing a state in which the armature according to the first embodiment is provided.

FIG. 6 is a perspective view showing a state in which the above-described armature is provided.

FIG. 7 is a perspective view showing a state where the normally closed fixed contact terminal is pressed into a base.

FIG. 8 is a perspective view showing a state in which the movable contact spring is pressed into a base.

FIG. 9 is a perspective view showing a state where the insulating wall and the card are mounted on a base.

FIG. 10 is a perspective view showing a state where the above case is attached to a base.

FIG. 11 is a perspective view showing a state where the case is attached to a base.

FIG. 12 is an exploded perspective view of a conventional example.

FIG. 13 is an exploded perspective view of the electromagnet.

FIG. 14 is a perspective view showing a state in which the armature according to the third embodiment is provided.

FIG. 15 is a perspective view showing a state in which the above-described armature is provided.

[Explanation of symbols]

 1 Electromagnet 11 Coil bobbin 11g Mounting part 12 Coil 14 Iron core 2 Yoke 3 Urging spring 4 Armature

Claims (4)

[Claims] 1. An electromagnet in which a coil is wound around an iron core in a state where a winding space is partitioned by a coil bobbin made of a molding material penetrated through the iron core, and one end fixed to a tip of the iron core. An electromagnet apparatus comprising: a yoke, and an armature that forms a closed magnetic path in a state of contact with the other end of the yoke when attracted to the base end of the iron core. An electromagnet device comprising an urging spring for urging an armature. 2. The electromagnet device according to claim 1, wherein said urging spring is made of metal. 3. The electromagnet device according to claim 2, wherein the urging spring is mounted on a mounting portion provided on the coil bobbin, and the mounting portion is a single mounting portion. 4. The electromagnet device according to claim 1, wherein said urging spring is integrally formed of the same material as said coil bobbin.