JP2000149749A - Contact piece structure of electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small but stably operatable relay, by installing a movable contact on a contact part, and by forming driving pieces to be elastically deformed and driven by a driving force generated by excitation and demagnetization of an electromagnet block, symmetrically to right and left through cut-off parts on both sides of the contact part, and by forming a removed part symmetrically to right and left on the lower side of the contact part or the driving pieces. SOLUTION: A movable contact part 62 and driving pieces 63 positioned on both sides are formed by cut-off parts 61 on the upper piece part of a contact piece part 59. The cut-off parts 61 have enlarged cut-off parts 61a enlarged to the periphery on the base part side of the movable contact part 62 and the driving pieces 63. A through hole is formed on the movable contact part 62, and a movable contact 64 is fixed by caulking so as to be positioned on both faces. On the lower half of the contact piece part 59, a notch 66 is formed on the center, and through holes 59a for fixing by caulking a terminal part 60 are perforated on the lower part. The upper edge of the notch 66 is spread in a mountain shape symmetrical to right and left, and the head is extended furthermore to the upside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact piece structure of an electromagnetic relay, and more particularly to a contact piece structure of an electromagnetic relay capable of performing a smooth operation even if it is very small.

[0002]

2. Description of the Related Art Conventionally, as a contact piece structure of an electromagnetic relay,
One is disclosed in U.S. Pat. No. 5,719,541. In this contact piece structure, the driving force of the electromagnet acts symmetrically via the card.

[0003]

However, in the contact piece structure of the electromagnetic relay, since an opening or a notch is formed asymmetrically around the contact, the elastic coefficient varies, and stable operation cannot be expected. For this reason, a torsional stress is likely to be generated, and in some cases, it is assumed that breakage may occur. In particular, since one of the portions pressed by the card is thin, there is a high risk of breakage at this portion.

Accordingly, an object of the present invention is to provide a contact piece structure of an electromagnetic relay that can operate stably by being sufficiently elastically deformed even if it is small.

[0005]

According to the present invention, as a means for solving the above-mentioned problems, a thin plate-shaped device having a movable contact on an upper portion and driven by excitation and demagnetization of an electromagnet block mounted on a base, In the contact piece structure of the electromagnetic relay that opens and closes with the fixed contact of the fixed contact piece standing opposite to each other, the contact portion provided with the movable contact, and formed on both sides of the contact portion symmetrically via cutout portions, And a driving piece which is driven by being elastically deformed by a driving force accompanying excitation / demagnetization of the electromagnet block, and a removing portion is formed symmetrically below the contact portion or the driving piece.

With the above configuration, the electromagnet block is excited and
When degaussing, the movable piece is driven by the drive piece being elastically deformed. Since the elastic coefficient of the movable contact piece is reduced by the cutout and the removed portion, the movable contact easily deforms elastically when the movable contact is closed to the fixed contact. Therefore, a desired contact pressure can be obtained even if the movable contact piece is small in size.

It is preferable to form the enlarged cut portion symmetrically by enlarging the cut portion at the contact portion and the base of the drive piece, since the movable contact piece can be more easily elastically deformed.

The removal portion may be formed by a notch formed upward from the center of the lower edge, or may be formed by an opening formed on the lower side.

It is preferable that a symmetrical auxiliary opening is formed between the contact portion and the removed portion, since the elastic opening can be further facilitated.

The driving piece is formed in a substantially semicircular shape from the side edge, and is provided with a locking receiving portion for locking the locking projection of the card for transmitting the driving force of the electromagnet block, thereby punching out. Since it can be formed without any problem, it is preferable in that generation of flash can be suppressed.

[0011]

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.

As shown in FIG. 2, the base 1 has a thick portion 6
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-fit receiving portion 8 and the second press-fit receiving portion 9 have 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-fit receiving portion 8 and the escape 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
Is partitioned by the third press-fit receiving portion 16. 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. Part 18
Consists of The contact piece press-fitting portion 17 has opposite side walls 32.
A press-fit groove 19 extending downward from the upper edge is formed on the inner surface. The guide part 18 is for guiding the insulating member 3 described later.

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 and 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 a substantially 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 15 provided on both sides of the slit 10.
And a second insertion hole 15 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 portion 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. The resection portion 61 has an enlarged resection portion 61a that is spread around the base of the movable contact portion 62 and the driving piece 63. 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. The locking projections 41 of the card 39 are locked to the locking receiving portions 65, respectively. 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. The upper edge of the notch 66 is expanded in a bilaterally symmetric mountain shape, and its tip extends further upward. in this way,
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 obtain a uniform and stable operation by the drive pieces 63 provided on both sides. Is available. A crimping projection 60a for caulking and fixing the contact piece 59 to the through hole 59a of the contact piece 59, a guide projection 60b for guiding the contact piece 59, and a third insertion of the base A third terminal portion 60c penetrating through the holes 22a and 22b. In addition, also in the said terminal part 60,
Similarly to the first fixed contact piece 45, as shown in FIG. 10 (b), for high power composed of two third terminals 60c, and as shown in FIG. 10 (c), one third terminal 60c. 60c, and the third insertion hole 22a for the high power.
In addition, the low power type is inserted into the third insertion hole 22b.

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.

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-fitting 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 60 is protruded from the insertion hole to be assembled. The second fixed contact piece 46 press-fits the second press-fit projection 57 of the second press-fit portion 56 from above into the press-fit groove 19 formed in the third press-fit receiving portion 16 of the base 1, and inserts the terminal portion 60 from the insertion hole. Assemble by projecting
At this time, the bent portion 53 is disposed on the thin portion 7 and the rib 20
Does not protrude. The movable contact piece 47 is connected to the terminal 6.
0 is press-fitted into the second press-fitting receiving portion 9 of the base 1 from above, and its terminals are protruded from the insertion holes to assemble them.
In this manner, 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 on 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 excited, 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 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.

Then, when the electromagnet section 28 is excited, the movable iron piece 30 is attracted to the end of the iron core 25 and turns, 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.

In the above embodiment, the movable contact piece 47 is used.
The contact piece 59 of FIG. 12 has the configuration shown in FIG.
The configuration shown in FIG.

That is, in FIG. 12A, an opening 100 is employed as a removing portion according to the present invention, instead of the notch 66 shown in FIG. 10A. In addition, this opening 10
A through-hole 101 serving as an auxiliary opening according to the present invention is formed between the movable contact 64 and the movable contact 64.

In FIG. 12B, the auxiliary opening is constituted by a vertically elongated slit 102.

FIG. 12C shows a configuration having an opening 103 in which the slit 102 communicates with the opening 100.

In FIG. 12D, not only the slit 102 is communicated with the opening 100 but also in FIG.
As in (a), an opening 104 having a shape communicating with the opening 100 side so as to gradually spread is provided.

In FIG. 12E, an inverted T-shaped opening 105 is formed as a removing portion according to the present invention instead of the notch 66 shown in FIG. A configuration in which the notches 106 are formed is adopted.

In FIG. 12 (f), a slit 107 is formed upward from the center of the lower edge as a removal portion according to the present invention, while a notch 108 is formed inward from both side edges.
And the leading end of the notch 108 is
A configuration extending downward along line 7 is employed.

In FIG. 12 (g), a slit 109 is formed upward from the center of the lower edge as a removing portion according to the present invention, and an intermediate portion of the slit 109 is extended on both sides, and furthermore, the tip thereof is formed. Is directed downward.

In FIG. 12H, an opening 110 is used in place of the notch 66 shown in FIG. The opening 110 has an upper edge spread in a mountain shape and a lower edge central portion extending downward.

FIG. 12 (i) has an opening 111 having a shape different from that of FIG. 12 (h). This opening 111 is
The upper edge is in the shape of a circular arc spread upward.

FIG. 12 (j) has an opening 112 and an enlarged cut-out portion 113 having different shapes from those of FIG. 12 (h). That is, the opening 112 has an arc shape in which the upper edge swells downward. The enlarged cut portion 113 is formed such that the lower edge has a substantially constant gap with the shape of the upper edge of the opening 112.

[0047]

As is clear from the above description, according to the contact piece structure of the electromagnetic relay according to the present invention, the contact piece is provided with a drive piece for receiving the driving force from the card, and a symmetrical removal is provided below the contact portion. Since the portion is formed, the elastic coefficient can be reduced. Therefore, even if the contact piece is small,
The contact pressure at the time of closing the contact can be set to a desired value, and the contact reliability can be improved.

Further, since the enlarged excision portion and the auxiliary opening are formed, the elastic modulus of the contact piece can be further reduced.

Further, since the locking receiving portion for locking the locking projecting portion of the card is formed in a substantially semicircular shape provided from the side edge of the arm portion, generation of burrs due to punching can be prevented. Therefore, after the completion of the electromagnetic relay, it is possible to prevent the occurrence of a malfunction or the like due to the shaving of the locking portion between the card and the locking projection.

[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 plan view of a movable contact piece according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Electromagnet block 3 ... Insulating member 4 ... Contact piece 28 ... Electromagnet part 39 ... Card 45 ... First fixed contact piece 46 ... Second fixed contact piece 47 ... Movable contact piece 53 ... Bending part 59 ... Contact piece part Reference numeral 61 denotes a cutting portion 61a an enlarged cutting portion 62 a movable contact portion 63 a driving piece 64 a movable contact 65 a locking receiving portion 66 a notch.

Continuing on the front page (72) Inventor Go Nishida, Omron Co., Ltd., 10-10, Hanazono Todocho, Ukyo-ku, Kyoto, Kyoto Prefecture

Claims (6)

[Claims] 1. An electromagnetic relay having a thin plate shape, having a movable contact at an upper portion thereof, driven by excitation and demagnetization of an electromagnet block mounted on a base, and opening and closing a fixed contact of a fixed contact piece which stands upright. In the contact piece structure, a contact portion in which the movable contact is provided, and formed symmetrically on both sides of the contact portion via cutout portions,
A driving piece that is elastically deformed and driven by a driving force accompanying excitation / demagnetization of the electromagnet block, wherein a removing portion is formed symmetrically below the contact portion or the driving piece. Contact piece structure. 2. The contact piece structure for an electromagnetic relay according to claim 1, wherein the enlarged cutout portion is formed symmetrically at the base of the contact portion and the drive piece by enlarging the cutout portion. 3. The contact piece structure for an electromagnetic relay according to claim 1, wherein the removing portion is formed by a notch formed upward from a central portion of a lower edge. 4. The contact piece structure for an electromagnetic relay according to claim 1, wherein the removing portion is constituted by an opening formed on a lower side. 5. The contact piece structure for an electromagnetic relay according to claim 1, wherein a left-right symmetric auxiliary opening is formed between the contact part and the removing part. 6. A driving member, wherein the driving piece is formed in a substantially semicircular shape from a side edge, and includes a locking receiving portion for locking a locking projection of a card for transmitting a driving force of the electromagnet block. The contact piece structure of an electromagnetic relay according to any one of claims 1 to 5, wherein