JP2000268693A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform an inserting work by providing a pushing part capable of being pushed into a base from an upper side on a movable contact piece and forming an insulating wall insulating the movable contact piece and a fixed contact piece on the base so that an insertion hole with an inserted terminal of the movable contact piece may be visualized and space between the insulating wall and the pushing part may be secured. SOLUTION: A first fixed contact piece 45 force-fits a forcible fitting protrusion into a forcible fitting reception part of a base 1 from an upper side, projects the forcible fitting protrusion from an insertion hole and assembles the forcible fitting protrusion. In the same way, also a second fixed contact piece 46 force-fits the forcible fitting protrusion into the forcible fitting reception part, projects the forcible fitting protrusion from the insertion hole and assembles the forcible fitting protrusion. In the same way, also a movable contact piece 47 force-fits the forcible fitting protrusion of a terminal part into the forcible fitting reception from the upper side and projects the forcible fitting protrusion from the insertion hole. Because the first and second fixed contact pieces 45, 46 and the movable contact piece 47 are assembled from the upper side, the direction of the base 1 is not required to be changed and the assembling works are efficient. An insulating member 3 guides a tip part by a guide part 18, force- fits and fixes a forcible fitting protrusion 43 into/to a forcible fitting hole, coats a bent part of the second fixed contact piece 46 and maintains an insulating state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, as an electromagnetic relay, US Pat.
No. 719,541 is disclosed. In this electromagnetic relay,
All the contact pieces are pressed into the press-fit holes of the base from above. In addition, the contact pieces are separated by an insulating wall up to the vicinity of a contact opening / closing portion for insulation.

[0003]

However, in the above-mentioned electromagnetic relay, the press-fit hole is hidden by the insulating wall formed high between the contact pieces, and it is difficult to insert the contact piece into the press-fit hole. . In addition, since each of the contact pieces has a substantially flat plate shape, the pressed portion is only a limited portion protruding from both edges. For this reason, the press-fitting operation becomes extremely difficult in combination with the height of the insulating wall.

[0004] Therefore, an object of the present invention is to provide an electromagnetic relay having a configuration capable of efficiently press-fitting a contact piece as a base.

[0005]

According to the present invention, as a means for solving the above-mentioned problems, a movable contact piece and a fixed contact piece are assembled to a base from above, and an electromagnet block is placed on a side of the movable contact piece and the fixed contact piece. In the electromagnetic relay described above, the movable contact piece is formed with a pushing portion that can be pushed into the base from above, and the base has an insulating wall that insulates the movable contact piece and the fixed contact piece from each other, and a terminal of the movable contact piece. Are formed so that the insertion hole through which the insertion portion is inserted can be visually recognized from the side, and an appropriate space can be secured between the insertion hole and the portion where the pushing portion is located.

[0006] With this configuration, there is no insulating wall near the insertion hole that hinders the operation of inserting the terminal, and this insertion operation can be easily performed. Also, when the pushing portion of the contact piece is pushed in, the insulating wall does not interfere, and the pushing operation can be easily performed.

It is preferable that the insulating wall be configured so as to also position one end of the electromagnet block covered with the insulating member, since the structure can be dealt with without complicating the structure.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view of the electromagnetic relay according to the present embodiment.

The electromagnetic relay generally includes a base 1, an electromagnet block 2, an insulating member 3, a contact piece 4, and a case 5 provided on the base 1.

The base 1 has a thick portion 6 as shown in FIG.
A first press-fit receiving portion 8 and a second press-fit receiving portion 9 are formed in the thick portion 6 on one end side.

As shown in FIG. 3A, the first press-fitting receiving portion 8 and the second press-fitting receiving portion 9 are provided with slits 1 in the width direction of the thick portion 6.
0a and 10b are formed. Each slit 10
Press-in protrusions 51 and 57 of the contact piece 4 are press-fitted at both ends of the contact pieces 4 and 10b, respectively. 11b are respectively formed. Further, a shielding wall 13 protrudes from the partition wall 12 that partitions the slits 10a and 10b. Both sides of the bottom surface of the slits 10a and 10b of the first press-fitting receiving portion 8 and the relief recess 11a
Each of the terminal portions 52 of the first fixed contact piece 45
The first insertion holes 14a and 14b for inserting the holes are respectively formed. On the other hand, on the bottom surface of each escape recess 11b of the second press-in receiving portion 9, each terminal portion 60c of the movable contact piece 47 is provided.
The second insertion holes 15 for inserting the holes are respectively formed. However, the insertion holes 14a and 14b of the slit 10a are not used at the same time (this point will be described later).

The thick portion 6 and the thin portion 7 of the base 1
Are separated by a third press-fitting receiving portion 16 which is an insulating wall according to the present invention. The third press-fit receiving portion 16 has a contact piece press-fit portion 17 protruding in a substantially U-shape toward the thick portion 6, and a guide having a substantially L-shaped cross section which is located on both sides of the contact piece press-fit portion 17 and protrudes further upward. And part 18. Contact piece press-fit part 17
On the inner surface of the opposing side wall 32, there is formed a press-fit groove 19 extending downward from the upper edge. The guide part 18 is for guiding the insulating member 3 described later. In addition, the third press-fit receiving portion 16 is formed so that the second insertion hole 15 can be visually recognized from the side, and as described later, the terminal can be easily inserted.

The thin portion 7 of the base 1 is reinforced by ribs 20 to prevent warping and the like, and rectangular press-in holes 21 are formed at three places. Also,
Third insertion holes 22a and 22b are formed in the thin portion 7 at two locations near one of the guide portions 18 and at one location near the other. Further, in the thin portion 7, locking recesses 23 are respectively formed on both side portions of the upper surface on one end side, and an engagement projection 24 is projected from one edge portion.

The electromagnet block 2, as shown in FIG.
A substantially L-shaped yoke 29 is integrated with an electromagnet section 28 in which a coil 27 is wound around a core 25 via a spool 26, and a movable iron piece 30 shown in FIG. Both ends of the upper end of the one end side flange portion 26a of the spool 26 are formed obliquely, and a pair of guide pieces 31 are formed by cutting out the center portion. Further, a side wall 32 and a bottom wall 33 extend from a lower half of both side edges and a lower edge of the one end side flange portion 26 a of the spool 26. A coil terminal 3 around which both ends of the coil 27 are wound, respectively, on the side wall 32
4 are press-fitted and integrated. The bottom wall 33 is provided with an engagement hole 35 with which the engagement protrusion 24 of the base 1 is engaged. A hinge spring 36 bent in a substantially L-shape is integrated with the movable iron piece 30. A locking claw 37 is cut and raised at one end of the hinge spring 36 and is inserted between the base 1 and the electromagnet block 2 to lock the locking recess 2 of the base 1.
3. In addition, the movable iron piece 30
Is formed on the upper part of the card 39, in which the card 39
Is locked at one end. Card 39
As shown in FIG. 6, the stopper has a substantially frame shape, and a stopper portion 40 extending downward is formed at the other end portion, and a locking projection 41 is formed at the end portion. The stopper surface 40a of the stopper portion 40 contacts the guide portion 18 of the base 1,
The movement range of the card 39 is regulated. The card 39 includes the guide pieces 3 of the spool 26.
A guide hole 42 where 1 is located is formed. The guide hole 42 is for enabling the card 39 to move stably.

The insulating member 3 is, as shown in FIG.
A press-fitting projection 4 for press-fitting each press-fitting hole 21 of the base 1 on the bottom wall 33.
3 are formed. In addition, guide grooves 44 are formed on the inner surface of the lower portion of the side wall of the insulating member 3 so that the yoke 29 of the electromagnet block 2 is press-fitted.

The contact piece 4 comprises a first fixed contact piece 45, a second fixed contact piece 46, and a movable contact piece 47 disposed therebetween.

As shown in FIG. 8A, the first fixed contact piece 45 is formed by pressing a conductive material into a substantially rectangular plate shape. A through hole 45 is provided in the upper part of the first fixed contact piece 45.
The first fixed contact 48 is swaged and fixed therein. Notches 49 are formed at the side edges of the first fixed contact piece 45, and the notches 49
The first press-fit portion 50 is wider than the upper portion of the first press-fit portion.
The first press-fitting portion 50 can be press-fitted into the first press-fitting receiving portion 8 of the base 1 by forming first press-fitting protruding portions 51 protruding in the plate thickness direction on both side portions. The first terminal portion 5 is provided at the lower end of the first fixed contact piece 45.
2 are formed. According to the type of the electromagnetic relay, as shown in FIG. 8B, the first terminal portion 52 has two first projecting portions projecting downward in the same plane from both lower end portions of the first fixed contact piece 45. As shown in FIG.
As shown in (c), there is a low power type provided with one first terminal portion 52 that protrudes in a crank shape from one side of the lower end.
In the case of the high power type, the two first terminal portions 52 are provided with the first insertion holes 14 provided on both sides of the slit 10 of the base 1.
a. On the other hand, for low power,
One first terminal portion 52 is inserted into a first insertion hole 14b provided in one of the escape recesses 11.

As shown in FIG. 9A, the second fixed contact piece 46 has a bent portion 53 which is bent at substantially a right angle at the lower end by pressing a conductive material. The upper portion of the second fixed contact piece 46 is formed with a through hole 46a
Fixed contact portion 55 to which the second fixed contact 54 is fixed by caulking
It has become. The lower side of the fixed contact portion 55 is a narrow second press-fit portion 56. The second press-fit portion 56 can be press-fitted into the second press-fit receiving portion 9 of the base 1 by forming second press-fit protrusions 57 protruding in the thickness direction at both upper edge portions thereof. I have. In addition, a second terminal portion 58 extending substantially at a right angle is formed at the tip of the bent portion 53,
The base 1 is inserted through the second insertion hole 15 and protrudes downward. As shown in FIG. 9 (b), the second terminal portion 58 also has a high-power configuration including two second terminal portions 58, as shown in FIG. There is a low power type comprising one second terminal portion 58, and each second insertion hole 22a provided on both sides of the slit 10 is provided.
And a second insertion hole 22b provided in one of the escape recesses 11.

As shown in FIG. 10A, the movable contact piece 47 has a plate-like contact piece 59 formed by pressing a conductive material, and a terminal caulked and fixed to the contact piece 59. And a unit 60.

The upper half of the contact piece 59 has a cutout 6
1 forms a movable contact portion 62 and driving pieces 63 located on both sides thereof. A through hole 46a is formed in the movable contact portion 62, and a movable contact 64 is fixed by caulking so as to be located on both surfaces. In addition, each driving piece 63
Are formed on the upper side edge of each of them in a semicircular shape, the locking receiving portions 65 of which inner edges are cut and raised. In each locking receiving portion 65,
The locking projections 41 of the card 39 are locked. On the other hand, a cutout 66 is formed in the center of the lower half of the contact piece 59, and a through hole 59a for caulking and fixing the terminal 60 is formed below the cutout 66. As described above, the contact piece portion 59 can reduce the stress required for driving the drive piece 63 by the cutout portion 61 and the notch 66, and the drive pieces 6 provided on both sides can be suppressed.
3, a uniform and stable operation can be obtained.

A crimping projection 60 for caulking and fixing to the through hole 59a of the contact piece 59 is provided on the terminal portion 60.
a, a guide projection 60b for guiding the contact piece 59, and a third terminal 60c penetrating through the third insertion holes 22a, 22b of the base. In the terminal portion 60, portions that protrude to both sides while being caulked and fixed to the contact piece portion 59 constitute push-in portions A and B according to the present invention. As shown in FIG. 10B, the terminal portion 60 is also provided with two third terminal portions 60c for high power as shown in FIG.
As shown in FIG. 0 (c), there is a low power type including one third terminal portion 60c, and a high power type is inserted into the third insertion hole 15 and a low power type is inserted into the third insertion hole 16, respectively. It has become.

As shown in FIG. 1, the case 5 is fitted to the outer edge of the base 1 and the flange of the spool 26 of the electromagnet block 2 to cover each component.
A gas hole 67 is formed in the ceiling surface of the case 5 so that the inside is evacuated or an inert gas is injected and then sealed.

Next, a method of assembling the electromagnetic relay will be described. Here, an electromagnetic relay for high power will be described.

First, each contact piece 4 is attached to each press-fit portion of the base 1. The first fixed contact piece 45 has a first press-fit portion 5
The first press-fitting projection 51 of No. 0 is press-fitted into the first press-fitting receiving portion 8 of the base 1 from above, and the terminal portion 52 is protruded from the insertion hole 14a to be assembled. The second fixed contact piece 46 press-fits the second press-fitting protrusion 57 of the second press-fitting portion 56 into the press-fitting groove 19 formed in the third press-fitting receiving portion 16 of the base 1 from above. Assembling is performed by projecting the terminal portion 58. At this time, the bent portion 53 is provided on the thin portion 7 and does not protrude from the rib 20. The movable contact piece 47 is assembled by pressing the terminal portion 60 into the second press-in receiving portion 9 of the base 1 from above and projecting the terminal 60c from the insertion hole 22a. In this case, the terminal section 60
The push-in portions A and B protruding from the contact piece portion 59 are pushed in. However, since the push-in portions A and B are separated from the third press-in receiving portion 16, the pushing operation is not hindered. Further, all of the contact pieces 4 can be assembled from above the base 1 and there is no need to change the direction of the base 1, so that the contact pieces 4 can be efficiently assembled.

When the attachment of each contact piece 4 is completed, FIG.
2, the insulating member 3 is attached to the base 1. The insulating member 3 is fixed by guiding one end edge thereof by the guide portion 18 and press-fitting the press-fitting projection 43 into the press-fitting hole 21. Thereby, the second fixed contact piece 4
6 can be completely covered with the insulating member 3,
The bent portion 53 can be disposed below the electromagnet block 2 while maintaining a sufficient insulating state between the two members.

Subsequently, the electromagnet block 2 previously assembled in another process is assembled to the base 1. Electromagnet block 2
Is assembled from one end of the base 1 so that one end thereof is accommodated in the insulating member 3. The electromagnet block 2 is configured such that both side edges of the yoke 29 are guided by the guide grooves 4
4 and is fixed by engaging the engaging projection 24 of the base 1 with the engaging hole 35 of the spool 26.

Next, the movable iron piece 30 to which the hinge spring 36 is attached is assembled to the base 1. One end of the hinge spring 36 is inserted between the base 1 and the electromagnet block 2 and the locking claw 37 is locked in the locking recess 23 of the base 1 so that the movable iron piece 30 is rotatably supported. .

Thereafter, the movable iron piece 30 and the movable contact piece 47 are connected by the card 39. Since the moving range of the card 39 is regulated by the guide portion 18 of the base 1 to which the electromagnet block 2 is attached, it is possible to accurately maintain the amount of pushing of the movable contact 64 with respect to the second fixed contact 54 at a constant amount. .

Finally, the case 5 is fitted to a part of the base 1 and the electromagnet block 2 to cover each component, and the fitted portion is sealed with a sealant.
7 is sealed to complete the electromagnetic relay.

Next, the operation of the electromagnetic relay will be described.

When the electromagnet section 28 is not energized, the movable iron piece 30 urges the movable contact piece 47 via the card 39 by the hinge spring 36, and the movable contact 64 is moved to the second fixed contact piece of the second fixed contact piece 46. Closed at 54. At this time, as described above, since the moving range of the card 39 is regulated by the guide portion 18 provided on the base 1, the pushing amount of the movable contact 64 with respect to the second fixed contact 54 is kept constant, and the desired contact is maintained. Reliability can be obtained.

When the electromagnet section 28 is excited, the movable iron piece 30 is attracted to the end of the iron core 25 and rotates, and the movable contact piece 47 is bent toward the first fixed contact piece 45 via the card 39. . Thereby, the movable contact 64 is separated from the second fixed contact 54, and is closed to the first fixed contact 48 of the first fixed contact piece 45.

By the way, in the above-described embodiment, the case where the configuration of the present invention is applied to an electromagnetic relay having a single-pole contact opening / closing section has been described, but the present invention is also applicable to an electromagnetic relay having two or more poles.

An electromagnetic relay having two contact switches is shown in FIG.
As shown in FIG. 15 and FIG.
Each of the press-fitting sections 8a, 8b, 9a, and 9b, which are separated by a, is provided so that different circuits can be opened and closed. Also, on the upper surface of the base 1, each bent portion 53 of each of the second fixed contact pieces 46a and 46b located on both sides.
A first groove 69 is formed therebetween. Further, as shown in FIG. 14, the first groove 69 is formed on the bottom surface of the insulating member 3.
A second groove 70 is formed at a position facing the second groove 70. Thereby, even if the base 1 is configured to be narrow, it is possible to sufficiently secure the creepage distance between the two bent portions 53 as shown in FIG. Even if one of the grooves 69, 70 is formed by a ridge that engages with one of the remaining grooves, a sufficient creepage distance can be similarly obtained. Other parts have the same configuration as the electromagnetic relay according to the embodiment.

In the above-described embodiment, the insulating member 3 is assembled to the base 1 only by press-fitting the press-fitting projection into the press-fitting hole 21 of the base 1. However, the insulating member 3 is assembled with an adhesive or a sealant. The attachment strength may be increased.

As shown in FIG. 16, the insulating member 3 is press-fitted by forming a substantially L-shaped slide press-fit portion on the bottom surface and inserting each slide press-fit portion from above and sliding it horizontally. You may make it form the slide press fit recessed state.

The insulating member 3 may be formed by secondary molding after attaching the electromagnet block 2 to the base 1.

[0039]

As is apparent from the above description, according to the electromagnetic relay of the present invention, the insertion wall through which the terminal of the movable contact piece is inserted can be visually recognized from the side, and the push-in portion is formed. Since the terminal is formed so as to secure an appropriate space between the terminal and the terminal, not only can the terminal be easily inserted into the insertion hole, but also the press-fitting operation can be easily performed.

Particularly, since the positioning of the electromagnet block is also performed at a part of the insulating wall, it is possible to obtain a configuration having high assembling properties at low cost without complicating the structure.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an electromagnetic relay according to an embodiment and a case thereof.

FIG. 2 is a perspective view of the base of FIG. 1;

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a perspective view of the electromagnet block of FIG. 1;

FIG. 5 is a perspective view of the movable iron piece of FIG. 1;

FIG. 6 is a perspective view of the card of FIG. 1;

FIG. 7 is a perspective view of the insulating member of FIG. 1;

FIG. 8 is a perspective view of a first fixed contact piece of FIG. 1;

FIG. 9 is a perspective view of a second fixed contact piece of FIG. 1;

FIG. 10 is a perspective view of the movable contact piece of FIG. 1;

11 is an exploded perspective view showing a state where an insulating member is assembled to the base of FIG. 1;

FIG. 12 is a perspective view showing a state where a case of an electromagnetic relay according to another embodiment is removed.

FIG. 13 is a sectional view of FIG.

FIG. 14 is a perspective view of the insulating member of FIG.

FIG. 15 is a perspective view of the base of FIG. 12;

FIG. 16 is a perspective view of an insulating member according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Electromagnet block 3 ... Insulating member 4 ... Contact piece 15 ... Second insertion hole 16 ... Third press-fit receiving part 21 ... Press-fit hole 22 ... Third insertion hole 28 ... Electromagnet part 45 ... First fixed contact piece 46 ... Second fixed contact piece 47 ... Movable contact piece 53 ... Bending part 60 ... Terminal part 60c ... Third terminal part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Masugi, Omron K.K. Inside

Claims (2)

[Claims] 1. An electromagnetic relay in which a movable contact piece and a fixed contact piece are assembled to a base from above and an electromagnet block is placed on a side of the movable contact piece and the fixed contact piece, wherein the movable contact piece can be pushed into the base from above. Forming a push portion, the insulating wall insulating the movable contact piece and the fixed contact piece from the base, an insertion hole through which a terminal of the movable contact piece is inserted can be visually recognized from the side, and the push portion An electromagnetic relay formed so that an appropriate space can be ensured between a portion where the electromagnetic relay is located. 2. The electromagnetic relay according to claim 1, wherein the insulating wall also serves to position one end of an electromagnet block covered with an insulating member.