JPH0440247Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an electromagnet device used in electromagnetic relays and the like.

(Prior Art) Conventionally, a yoke is provided with two yokes each having a main body and a magnetic pole piece facing the main body formed by bending the tip side of a plate material, and a spool having a flange formed at both ends of a cylindrical body.
The yoke main body is press-fitted from both ends of the insertion portion of the body and overlapped, and the magnetic pole piece is opposed to the side of a coil wound around the body of the spool to form a substantially C-shaped electric circuit. An electromagnet device has been proposed in Japanese Utility Model Application Publication No. 58-49411.

(Problem to be solved by the invention) However, in the electromagnet device, although the yoke body is press-fitted into the body of the spool and overlapped, the yoke and spool have some manufacturing errors, so the yoke It is difficult to bring the bodies into uniform contact with each other without any gaps.

As a result, the yoke wobbles, making it impossible to accurately position the opposing magnetic pole pieces on the same plane, and the magnetic attraction force of the magnetic pole pieces fluctuates. Therefore, an electromagnetic relay or the like incorporating such an electromagnetic device has the problem that normal operating characteristics cannot be ensured, and this tendency is particularly noticeable as the cross section of the yoke body into which it is press-fitted becomes smaller. .

(Means for Solving the Problems) The present invention solves the above problems and provides an electromagnetic device that does not cause rattling of the yoke, accurately positions the magnetic pole piece, and can obtain stable operating characteristics. In the electromagnet device, the portion from the tip side of the yoke body to the tip of the magnetic pole piece is widened in the plate width direction to form a widened portion, and the insertion portion is widened in the flange portion. A recess is formed in the recess, and the widened portion of the yoke is fitted into the recess.

(Example) Hereinafter, the present invention will be explained with reference to the accompanying drawings.

FIG. 1 shows an electromagnet device 1 according to the present invention,
This electromagnet device 1 is roughly composed of a coil device 2 and yokes 10a and 10b.

As shown in FIGS. 2 and 3, the coil device 2 includes collar portions 6a and 6b integrally provided at both ends of a cylindrical body portion 4 having a rectangular insertion portion 5, and a coil 8 on the outside of the body portion 4. is wound, and both ends thereof are connected to coil terminals 9a, 9b provided on the flanges 6a, 6b.

Grooves 7a and 7b are formed in opposing portions of the flanges 6a and 6b, respectively, and as shown in FIG. The upper half of the insertion portion 5 located in the flange portion 6b is expanded in the vertical direction.

The yokes 10a and 10b are roughly U-shaped, with the tip sides of magnetic plates bent to form main bodies 11a and 11b, and magnetic pole pieces 12a and 12b facing the main bodies 11a and 11b, respectively. The portion from the tip side to the tip of the magnetic pole pieces 12a, 12b is expanded in the plate width direction (vertical direction) to form a widened portion 13.
a and 13b are formed respectively, and the widened portion 13
The plate width of the part having a and 13b is the flange part 6a and 6b.
It is set to be the same as the vertical width of .

Note that the distance between the main bodies 11a, 11b and the opposing magnetic pole pieces 12a, 12b is the same as that of the yoke 10a.
The yoke 10b is made larger by the thickness of the plate than the other yoke 10b.

As shown in FIG. 1, in the electromagnet device 1 having the above configuration, the yoke bodies 11a and 11b are press-fitted from both ends of the insertion portion 5 and overlapped, and the widened portions 13a and 13b on the body side are respectively inserted into the groove 7a. , 7b, and the magnetic pole pieces 12a, 12b
are opposed to each other at the sides of the coil 8, and the yokes 10a and 10b constitute a substantially C-shaped magnetic circuit.

In this way, the widened portions 13a and 13b of the yokes 10a and 10b are positioned and fixed in the grooves 7a and 7b, respectively, so even if the state of contact between the main bodies 11a and 11b is uneven,
The magnetic pole pieces 12a and 12b are held parallel to each other on the same plane without wobbling, and there is no difference in level between them.

Next, an example of the use of the electromagnet device 1 will be explained with reference to FIGS. 2 and 3.

2 and 3 show an electromagnetic relay in which an electromagnet device 1, a movable block 30, and a contact mechanism 40 are assembled in a housing consisting of a base 20 and a case 21.

That is, when a current is applied to the coil 8 via the terminals 9a, 9b to excite the magnetic pole pieces 12a, 12b with opposite polarities, the magnetic pole pieces 12a, 12b are located on both sides of the magnetic pole pieces 12a, 12b, and are opposed to each other with the magnets 32, 32 sandwiched therebetween. The movable iron pieces 31, 31 are attracted, and the movable block 30 rotates around the support shaft 33 in a clockwise or counterclockwise direction.

As a result, the protrusion 34 of the movable block 30,
34 presses the movable contact piece 42 whose center is supported by the common terminal 41, turns on either the left or right contact part 43 or 44, and switches the output.

Note that during the above operation, the opposing magnetic pole pieces 12a, 1
Since the magnetic pole pieces 2b are fixed on the same plane in parallel without wobbling, the magnetic attraction force of the magnetic pole pieces 12a and 12b is stable.

Therefore, no matter which direction the movable block 30 rotates, the movable contact piece 42 can obtain the same contact stroke and contact pressure on the left and right sides, and the electromagnetic relay can ensure stable operating characteristics. .

In the embodiment described above, the grooves 7a and 7b are formed in the flanges 6a and 6b, respectively, and the widened portion 13 is formed here.
a and 13b, but the widened part 13
Depending on the size of a, 13b, the recess into which they fit is not limited to the grooves 7a, 7b, but may be a simple depression.

(Effect of the invention) As is clear from the above explanation, the electromagnet device according to the invention has two yokes formed in a substantially U-shape that are press-fitted into the spool insertion portion and overlapped.
A letter-shaped electric circuit is formed, and the widened portions of each yoke are fitted into recesses formed in the flanges at both ends to be firmly fixed.

Therefore, the yoke does not wobble, and since the opposing magnetic pole pieces are held parallel on the same plane, the magnetic attraction of the magnetic pole pieces is stabilized.

Therefore, in an electromagnetic relay or the like incorporating the electromagnetic device according to the present invention, the operation of the movable block that is attracted to the magnetic pole piece and the contact state of the contact portion are stabilized.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an electromagnetic device according to the present invention, and FIGS. 2 and 3 are a cross-sectional view and a vertical cross-sectional view of an electromagnetic relay. 1... Electromagnet device, 2... Coil device, 3...
Spool, 4... Body, 5... Insertion part, 6a, 6
b...Flame, 7a, 7b...Groove (recess), 8...
...Coil, 10a, 10b...Yoke, 11a,
11b...Main body, 12a, 12b...Magnetic pole piece, 1
3a, 13b... Widening section.

Claims (1)

[Scope of utility model registration request] Two yokes are formed by bending the tip side of a plate material to form a main body and a magnetic pole piece facing the main body, and a spool having flanges formed at both ends of a cylindrical body. In the electromagnet device, the yoke bodies are press-fitted and overlapped, and the magnetic pole pieces are opposed to each other at the sides of a coil wound around the body of the spool, forming a substantially C-shaped magnetic circuit. The part from the tip side to the tip of the magnetic pole piece is widened in the plate width direction to form a widened part, and the insertion part is widened in the flange to form a recess, and the widened part of the yoke is formed in the recess. An electromagnetic device characterized by being fitted with.