JPH0653031A - Electromagnetic device - Google Patents

Abstract

PURPOSE:To obtain an electromagnet device wherein the inclination of a movable flame can be made small, the design freedom of the movable frame can be improved, and the deformation of a member having large influence upon characteristic scarcely occurs. CONSTITUTION:A part which holds an armature 5 is made a connection segment 8d. From the connection segment 8d, facing leg segments 8b, 8c are continuously connected with a movable frame 8. Pivotary motion supporting parts 8g, 8g are installed on both of the leg segments 8b, 8c. From other end 4d of a yoke, two superposing leg segments 4b, 4c are continuously connected with the respective leg segments of the movable frame. Supporting parts 4g, 4g for supporting the pivotary motion supporting part are installed on the respective leg segments 4b, 4c, Hence magnetic pole surfaces 4a, 4a are subjected to position regulation by the two leg segments 4b, 4c of the yoke.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnet device used for an electromagnetic relay or the like.

[0002]

2. Description of the Related Art As this type of electromagnet device, in particular, there is a polar type electromagnet device having a structure shown in FIG.

In the figure, 1 is a coil frame having a winding drum portion and flanges connected to both ends thereof, 2 is a coil wound around the coil frame 1, and 3 is a coil penetrating through the winding drum portion of the coil frame 1. Frame 1
One end protruding from the fixed iron core having pole faces 3a, 3a, and 4 one end facing the pole faces 3a, 3a of the fixed iron core 3
a, the other end of which is connected to the other end of the fixed core 3, the yoke,
5 is located between the magnetic pole surfaces 3a and 4a of the fixed iron core 3 and the yoke 4, and the magnetic pole surfaces 3a and 4a are controlled by controlling the excitation of the coil 2.
The armature 6 has armatures 6 and 6 which are attracted and separated from each other, and a permanent magnet 7 sandwiched between the armatures 6 and 6, and 8 holds the armature 5 so as to ensure the operation of the armature 5 and is rotatably arranged. It is a movable frame.

The movable frame 8 has a rotation fulcrum portion 8g on the side opposite to the armature 5, which is fitted to a support portion 1g provided on the coil frame 1. Further, since the movable frame 8 becomes a member that drives the movable contact plate when used in an electromagnetic relay,
A contact drive unit 8e is formed near the middle.

In this electromagnet device, when the coil 2 is not excited, the armatures 6, 6 of the armature 5 are attracted by the magnetic force of the permanent magnet 7 to one of the magnetic pole faces 3a, 3a of the fixed iron core 3. Then, the coil 2 is excited by applying a current in an appropriate direction, and the armatures 6, 6 are attracted to the magnetic pole surface 3a on the side that has been separated. Since the operation of the armature 5 is also the operation of the movable frame 8, the contact drive unit 8e opens and closes the contact device when used in the electromagnetic relay.

In this electromagnet device, each armature 6, 6 has a magnetic pole surface.
Since there are four magnetic gaps located between 3a and 4a, the attractive force width can be increased. In addition, the winding width of coil 2 is
Since it is not regulated by a and 4a, the number of turns can be increased and efficiency can be improved.

[0007]

The electromagnet device described above has various advantages in basic structure, but has the following problems in concrete structure. That is, since the movable frame 8 holding the armature 5 has a structure in which the rotation fulcrum portion 8g is fitted to the support portion 1g of the coil frame 1, it is necessary to maintain and manage the dimensions of the fitting portion with high accuracy. . In reality, variation in the dimensions of the fitting portion is unavoidable, and if the clearance is large, the movable frame 8 tilts as shown by the broken line in FIG. Then, the part of the movable frame 8 away from the rotation fulcrum 8g may come into contact with the cover C of the electromagnetic relay or the armatures 6,6.
The inclination with respect to the magnetic pole surfaces 3a, 4a increases, and the operating voltage rises or the operating characteristics deteriorate.

Further, since the movable frame 8 is supported by the coil frame 1, the position of the rotation fulcrum portion 8g is restricted, and the degree of freedom in matching the spring load and designing the stroke is low.

Further, since one end of the yoke 4 which becomes the magnetic pole surfaces 4a, 4a has a cantilever structure that is bent and formed, deformation or the like is likely to occur during assembly.

The present invention has been made in view of the above circumstances. A first object of the present invention is to provide an electromagnet device capable of reducing the inclination of a movable frame, and a second object thereof is. The third purpose is to provide an electromagnet device in which the degree of freedom in designing the movable frame is increased.
An object of the present invention is to provide an electromagnet device that does not easily deform a member that greatly affects the characteristics.

[0011]

In order to solve the above problems, an electromagnet device according to a first aspect of the present invention is provided with a coil frame having a winding barrel portion and flange portions continuously provided at both ends thereof, and wound around the coil frame. The coil and the fixed iron core that penetrates the coil barrel winding portion and protrudes from the coil frame and has one end serving as a magnetic pole surface, and one end that is a magnetic pole surface that faces the magnetic pole surface of the fixed iron core and the other end is connected to the other end of the fixed iron core. And the armature that has an armature that is located between the fixed iron core and the magnetic pole surface of the yoke and that attracts and separates from the magnetic pole surface by controlling the excitation of the coil, and holds and rotates it to ensure the operation of the armature. In an electromagnet device provided with a freely arranged movable frame, the movable frame is such that a portion holding an armature is used as a connecting piece, and leg pieces facing from the connecting piece are continuously provided, and a pivoting fulcrum is provided on both leg pieces. It is configured to have a section.

Further, in the electromagnet device according to a second aspect of the present invention, the yoke is provided with two leg pieces which are superposed on each leg piece of the movable frame from the other end, and the leg pieces of the movable frame are connected to the respective leg pieces. It is configured to include a support portion that supports the dynamic fulcrum portion.

Further, in the electromagnet device according to a third aspect of the present invention, the magnetic pole surface of the yoke is restricted by the two leg pieces of the yoke.

[0014]

According to the structure of the first aspect, since the movable frame is provided with the turning fulcrums on both leg pieces facing each other and is supported at two points, the inclination of the movable frame can be greatly reduced.

Further, according to the second aspect of the invention, since the supporting portion for supporting the rotation fulcrum portion of the movable frame is provided on the two leg pieces of the yoke, the supporting portion can be set at any position. .

Further, according to the third aspect of the present invention, the magnetic pole surface of the yoke is supported by both legs by the two leg pieces so that there is almost no deformation during assembly.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The members having the same basic functions as those of the conventional example described above are designated by the same reference numerals.

Reference numeral 1 denotes a coil frame, which is provided at both ends of the winding drum portion with collar portions 1a, 1a.
b is installed in series. The coil 2 is wound around the winding barrel of the coil frame 1. Coil terminals 2a, 2a, 2a are fixed through one flange portion 1a of the coil frame 1 so as to penetrate therethrough.

Numeral 3 is a fixed iron core having a substantially T-shape with one end having a wide width portion 3b and the other end having a narrow width portion 3c. Both sides of the wide width portion 3b serve as magnetic pole surfaces 3a, 3a for an armature described later.

Reference numeral 4 is a yoke, which is a pair of two opposing leg pieces 4b and 4c.
And connecting pieces 4d for connecting them, and magnetic pole pieces 4e, 4f extending on opposite sides from each other at the tips of the leg pieces 4b, 4c. The magnetic pole pieces 4e, 4f are one end of the yoke 4 and are bent at substantially right angles so as to face each other at the position of the broken line, and the respective inner surfaces become the magnetic pole surfaces 4a, 4a.

The two leg pieces 4b, 4c are so arranged that their opposing intervals are such that the coil frame 1 can be fitted therein, and the outer surface of the leg pieces 4b, 4c has a shaft-like support portion for supporting a movable frame described later. 4g and 4g are formed. Further, concave-convex fitting portions 4h, 4h are formed on the side surface of the tip portion on the side where the magnetic pole pieces 4e, 4f are not provided. The pole pieces 4e, 4f are formed with recesses 4j, 4j that fit into the fitting parts 4h, 4h at their tips, and when bent at a substantially right angle as described above, these recesses 4j, 4j The fitting parts 4h, 4h are fitted and the position is regulated.

The connecting piece 4d is a yoke for the magnetic pole pieces 4e, 4f.
A fixing hole 4k is provided at the other end of the same and substantially in the center thereof.
In the fixed iron core 3 described above, the narrow portion 3c at the other end is passed through the winding barrel portion of the coil frame 1, and the end portion thereof is fixed to the fixing hole 4k and coupled to the yoke 4. As a result, the magnetic pole surfaces 3a, 3a of the fixed iron core 3 and the magnetic pole surfaces 4a, 4a of the yoke 4 face each other with a predetermined interval.

Numeral 5 is an armature, which is composed of two armatures 6 and 6 and a permanent magnet 7 sandwiched between them, and is held by a movable frame which will be described later and between the magnetic pole faces 3a and 4a of the fixed iron core 3 and the yoke 4. Located in. This armature 5 is attracted and separated from the magnetic pole surfaces 3a, 3a of the fixed iron core 3 by controlling the excitation of the coil 2. Depending on the design, the armature 5 may have magnetic pole faces 3a, 3a.
At the same time, the magnetic pole surfaces 4a, 4a of the yoke may be attracted and separated from each other.

8 is a movable frame, which is made of resin,
It is rotatably arranged so as to hold it so as to secure the operation of. Specifically, the two opposing leg pieces 8b and 8c and the connecting piece 8d that connects them together form a generally U-shape. The leg pieces 8b, 8c are superposed with the leg pieces 4b, 4c of the yoke 4, and the inner dimension thereof is slightly larger than the outer dimension of the leg pieces 4b, 4c. In addition, hole-shaped turning fulcrums 8g, 8g that fit into the supporting portions 4g, 4g of the yoke 4 are formed at the tip ends of the leg pieces 8b, 8c. Then, the above-mentioned armature 5, that is, the two armatures 6 and 6 and the permanent magnet 7 are held by the connecting piece 8d.

When the movable frame 8 is used for an electromagnetic relay, it serves as a member for driving the movable contact plate, so that one leg piece 8b is used.
A contact drive portion 8e is formed in the vicinity of the middle (upper side in the drawing).

In this electromagnet device, when the coil 2 is not excited, the armatures 6, 6 of the armature 5 are attracted to either of the magnetic pole faces 3a, 3a of the fixed iron core 3 by the magnetic force of the permanent magnet 7. Then, the coil 2 is excited by applying a current in an appropriate direction to attract the armatures 6, 6 to the magnetic pole surface 3a on the side that has been separated until then, as shown in FIG. Since the operation of this armature 5 is also the operation of the movable frame 8, its contact drive unit 8e (not shown in FIG. 2) opens and closes the contact device when it is used in an electromagnetic relay.

In this electromagnet device, the movable frame 8 is provided with turning fulcrums 8g and 8g on both leg pieces 8b and 8c facing each other, and this is supported by two points of the supporting portions 4g and 4g of the yoke 4, The tilt of the movable frame 8 can be greatly reduced. That is, as shown in FIG. 3, even if the movable frame 8 inclines due to the clearance between the one rotation fulcrum portion 8g and the support portion 4g, the other rotation fulcrum portion 8g.
Even if the support portion 4g and the support portion 4g have the same clearance, they are at a distance x sufficiently far from each other that they hardly tilt.
Therefore, it is possible to prevent the operating voltage from rising and the operating characteristics from deteriorating as compared with the conventional one.

Further, since the support portions 4g, 4g for supporting the rotation fulcrum portions 8g, 8g of the movable frame 8 are provided on the two leg pieces 4b, 4c of the yoke 4, the support portions 4g, 4g are arbitrary. Can be set to position. Therefore, the degree of freedom in matching the spring load and designing the stroke is high.

Further, since the magnetic pole surfaces 4a, 4a of the yoke 4 are supported on both sides by the two leg pieces 4b, 4c, there is almost no deformation during assembly.

Next, a second embodiment of the present invention will be described with reference to FIGS.
It will be described based on. This is the yoke of the first embodiment.
4 is formed by two members, which are later integrated. This one also has the same effect as the first embodiment, and
The die of the yoke 4 can be easily manufactured, and the material loss of the yoke 4 can be reduced.

Next, a third embodiment of the present invention will be described with reference to FIGS. 6 and 7.
It will be described based on. This is the first and second embodiments.
The shapes of the support portions 4g, 4g and the rotation fulcrum portions 8g, 8g of the embodiment are changed. That is, the support portions 4g, 4g are in the shape of holes, and the rotation fulcrums 8g, 8g are in the shape of shafts. Accordingly, when the movable frame 8 is fitted to the yoke 4, the leg pieces 8b and 8c of the movable frame 8 are elastically deformed. This one also has the same effects as the first embodiment, and the work of assembling the movable frame 8 is easy.

In each of the embodiments, the movable frame is described as being fitted and supported by the yoke, but the movable frame may be fitted and supported by an appropriate member other than the yoke. If the deformation of the magnetic pole surface of the yoke does not pose a problem due to the material surface or the installation of other position regulating members, the magnetic pole surface may have a cantilever support structure. Further, the permanent magnet may be inserted in a part of the yoke or the fixed iron core, and further, it can be applied to one having no permanent magnet.

[0033]

In the electromagnet device according to the first aspect of the present invention, since the movable frame is provided with the pivoting fulcrum portions at both leg pieces facing each other and is supported at two points, the inclination of the movable frame can be greatly reduced and the movable frame can be operated. It is possible to suppress an increase in voltage and a decrease in operating characteristics.

Further, in the electromagnet device according to the second aspect, in addition to the above-mentioned effect, since the supporting portions for supporting the rotation fulcrum portion of the movable frame are provided on the two leg pieces of the yoke, the supporting portions are arbitrary. The position can be set to, which increases the degree of freedom in designing the movable frame.

Further, in addition to the above-mentioned effects, the electromagnet device according to the third aspect of the present invention has the magnetic pole surface of the yoke supported by the two leg pieces at both ends, so that there is almost no deformation during assembly. The deformation of the member having a large influence is less likely to occur.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 is a plan view thereof.

FIG. 3 is a side view thereof.

FIG. 4 is an exploded perspective view showing a second embodiment of the present invention.

FIG. 5 is a plan view thereof.

FIG. 6 is an exploded perspective view showing a third embodiment of the present invention.

FIG. 7 is a plan view thereof.

FIG. 8 is an exploded perspective view showing a conventional example.

FIG. 9 is an enlarged view of a main part for explaining the problem.

[Explanation of symbols]

 1 Coil frame 2 Coil 3 Fixed iron core 3a, 3a Fixed iron core pole face 3b Fixed iron core wide part (one end) 3c Fixed iron core narrow part (other end) 4 Yoke 4a, 4a Yoke magnetic pole face (one end) 4b, 4c Yoke leg piece 4d Yoke connecting piece (other end) 4e, 4f Yoke pole piece 4g, 4g Yoke support section 4h, 4h Yoke leg piece mating section 4j, 4j Yoke pole piece recess 5 Amachiya 6,6 Armature armature 7 Amachiya permanent magnet 8 Movable frame

Claims (3)

[Claims] 1. A coil frame having a winding drum portion and flanges continuously provided at both ends thereof, a coil wound around the coil frame, and one end of the coil frame penetrating the winding drum portion of the coil frame and projecting from the coil frame. Is located between the fixed iron core and the magnetic pole surface of the yoke, and the coil is located between the fixed iron core and the yoke, and controls the excitation of the coil. In the electromagnet device, the armature has an armature that is attracted to and separated from the magnetic pole surface, and a movable frame that holds the armature to ensure the operation of the armature and is rotatably disposed. The electromagnet device, wherein the armature holding portion is used as a connecting piece, and the leg pieces facing each other are continuously provided from the connecting piece, and a pivoting fulcrum portion is provided on both leg pieces. 2. The yoke comprises a support portion for connecting two overlapping leg pieces to each leg piece of the movable frame from the other end, and for supporting a rotation fulcrum portion of the movable frame on each leg piece. The electromagnet device according to claim 1, wherein the electromagnet device is provided. 3. The yoke has a magnetic pole surface whose position is regulated by two leg pieces.
The electromagnet device described.