JP2000348590A - Electromagnetic relay - Google Patents

Abstract

(57) [Summary] [Problem] To assemble a movable iron piece, a hinge spring is not deformed, is inserted obliquely, and does not generate resin dust. SOLUTION: An insertion portion 23b is formed between a base 1 and an electromagnet block 2. A lock receiving portion 23a and a guide portion 23c are provided on one of the inner surfaces constituting the insertion portion 23b. A hinge spring 36 having a locking portion 37 inserted into the insertion portion 23b and locked to the locking receiving portion 23a in the movable iron piece 30.
Is provided. A bent portion 36a guided by the guide portion 23c is formed on at least one side edge of the hinge spring 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay,
The present invention relates to an electromagnetic relay having a feature in the mounting structure of the movable iron piece.

[0002]

2. Description of the Related Art Conventionally, as an electromagnetic relay, for example, FIG.
6 (registered utility model 25705)
No. 72). In this electromagnetic relay, the movable contact piece 102 and the fixed contact piece 1
03 are arranged opposite to each other. An electromagnet block 104 is accommodated in the upper accommodation portion 101b of the base 100. A movable iron piece 105 is disposed above the electromagnet block 104, and the movable contact piece 102 is
06. The movable iron piece 105 is provided with a hinge spring 107. Hinge spring 107
Is formed with a locking portion 108. Electromagnet block 1
A lock receiving portion (not shown) is formed on an end surface of the cover 04. Then, the hinge spring 107 is inserted into the gap between the base 100 and the electromagnet block 104, and the locking portion 108 is locked to the locking receiving portion, whereby the movable iron piece 105 can be assembled.

[0003]

However, the hinge spring 107 is formed to be thin so that the movable iron piece 105 can rotate smoothly. For this reason, there is a problem that it is easily deformed when inserted into the gap. Also,
There is also a problem that it is easy to be inserted obliquely and cannot be assembled properly. In this case, simply guiding both side edges of the hinge spring 107 with the base 100 or the like has the following problem. That is, since the hinge spring 107 is pressed, burrs are formed at the edges. The base 100 and the like for guiding the edge are made of resin. For this reason,
The guide portion is shaved by the burrs, and the generated resin dust is scattered in the internal space, and in some cases, adheres to the contact surface to cause poor contact. On the other hand, removing burrs increases the number of man-hours and increases the cost.

Accordingly, an object of the present invention is to provide an electromagnetic relay having a configuration in which a hinge spring is not deformed, is inserted obliquely, or does not generate resin dust when a movable iron piece is assembled. And

[0005]

According to the present invention, as a means for solving the above problems, an electromagnet block provided on a base is excited and demagnetized to rotate a movable iron piece and drive a movable contact piece. In an electromagnetic relay for opening and closing a movable contact of the movable contact piece to a fixed contact of a fixed contact piece disposed oppositely, an insertion portion is formed between the base and the electromagnet block, and an inner surface constituting the insertion portion. And the movable iron piece is provided with a hinge spring having a locking portion inserted into the insertion portion and locked to the lock receiving portion, and at least one of the hinge springs is provided on the movable iron piece. A bent portion guided by the guide portion is formed on one side edge.

With this configuration, when the hinge spring of the movable iron piece is inserted into the insertion portion in a state where the electromagnet block is assembled to the base, the bent portion is guided by the guide portion and does not tilt. The strength of the hinge spring itself is increased by the bent portion, and the hinge spring is not deformed even if it is thin. Then, the locking portion is locked to the locking receiving portion, so that the locking portion cannot drop off, and the mounting of the movable iron piece is completed.

[0007] It is preferable that the bent portion has a curved surface guided by the guide portion, since a burr formed on an edge portion of the hinge spring does not slidably contact the guide portion during processing.

[0008] The engaging portion may be formed in the bent portion.

[0009]

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.

This electromagnetic relay generally comprises 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
And a thin plate portion 7. The thick portion 6 is divided into two in the width direction by the partition wall 1a, and the first press-fit receiving portions 8a and 8b and the second press-fit receiving portions 9 are formed in the width direction.
a, 9b are formed.

As shown in FIG. 3A, the first press-fit receiving portion 8
a, 8b and the press-fitting projections 51a, 51b, 57 of the contact piece 4 at both ends of the second press-fit receiving portions 9a, 9b as described later.
a and 57b are press-fitted respectively. In each of the press-fit receiving portions 8a, 8b and 9a, 9b, escape recesses 11a, 11b directed toward the other end of the base 1 are formed, respectively. The first insertion hole 1 through which each terminal portion 52 of the first fixed contact piece 45 is inserted is provided at the bottom end of the first press-fit receiving portion 8a, 8b and at one bottom surface of the escape recess 11a.
4a and 14b are respectively drilled. On the other hand, the bottom surface of each escape recess 11b of the second press-in receiving portion 9 has a second insertion hole 1 for inserting each terminal portion 60a of the movable contact piece 47.
5 are provided.

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 is a contact piece press-fit portion 1 protruding toward the thick portion 6 side.
7 and a guide portion 18 located on both sides of the contact piece press-fitting portion 17 and projecting further upward and having a substantially L-shaped cross section.
In the contact piece press-fitting portion 17, a press-fit groove 19 is formed on the inner surface of the opposing side wall 32 so as to extend downward from the upper edge. 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 warpage and the like, and rectangular press-in holes 21 are formed at three places. Also,
The thin portion 7 has third insertion holes 22a at two locations near one of the guide portions 18 and third insertion holes 2 at one location near the other.
2b are respectively formed. Also, in the thin portion 7,
A locking recess 23a is formed in the center of the upper surface on one end side, and a groove 23b is formed on both sides thereof. The outer inner surface 23c of the groove 23b serves as a guide for a hinge spring 36 provided on the movable iron piece 30 described later. Further, an engagement protrusion 24 protrudes from one edge of the thin portion 7.

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. The electromagnet block 2 is assembled so as to form a gap (insertion portion) C into which the hinge spring 36 can be inserted into the base 1 as described later.

As shown in FIG. 5, a hinge spring 36 is integrated with the movable iron piece 30. The hinge spring 36 is
The center portion of the rectangular leaf spring is cut into a substantially H shape by press working, and further bent into a substantially L shape. One end of the hinge spring 36 is fixed to the movable iron piece 30 by caulking. On the other hand, the locking claw 3 is provided on the other end of the hinge spring 36.
7 has been cut and raised. The locking claw 37 is attached to the base 1
And the electromagnet block 2, and is inserted into an insertion portion formed between the base 1 and the engagement recess 23 a of the base 1. A bent portion 36a is formed on both side edges of the other end of the hinge spring 36 so that burrs generated during the press working are located inside. The bent portion 36a
It is inserted into a groove 23b formed in the base 1, and its side surface comes into contact with the outer inner surface 23c of the groove 23b. Thereby, the hinge spring 36 and the movable iron piece 30
Can be positioned in the width direction. At this time, since the burrs are located inside, there is no direct contact with the inner surface of the groove 23b, so that no resin dust is generated from the base 1. Further, since the bent portion 36a itself has elasticity, the positioning state is stabilized. The bent portion 36a
May be further bent inward to form a curved surface on the outside, and this curved surface may be brought into contact with the outer inner surface 23c of the groove 23b. Thus, the hinge spring 36 can be completed without worrying about the formation position of the burr. Further, although the two bent portions 36a are provided, only one of them may be provided.

A locking portion 38 is provided above the movable iron piece 30.
Is formed, and one end of the card 39 is locked therein. The card 39 is, as shown in FIG.
A stopper 4 having a substantially frame shape and extending downward at the other end.
0 is formed, and a locking projection 41 is formed at the end. The stopper surface 40a of the stopper portion 40 comes into contact with the guide portion 18 of the base 1 so as to regulate the moving range of the card 39. The card 39 has a guide hole 4 in which each guide piece 31 of the spool 26 is located.
2 are formed. The guide hole 42 is for enabling the card 39 to move stably.

As shown in FIG. 7, the insulating member 3 has a cylindrical shape that opens only at one end, and press-fit projections 43 for press-fitting the press-fit holes 21 of the base 1 are formed on the bottom wall 33. ing. A guide groove 44 is formed on the inner surface of the lower part of the side wall of the insulating member 3, and the electromagnet block 2
Yoke 29 is press-fitted.

The contact piece 4 is composed of a first fixed contact piece 45 and a second fixed contact piece 46, and a movable contact piece 47 disposed therebetween, and each is a single pole type.

As shown in FIG. 8A, the first fixed contact piece 45 is formed by pressing a conductive material into a substantially rectangular plate shape. The first fixed contact piece 45 has a notch 45a formed upward from the center of the lower edge. The notch 45a is for avoiding interference with the partition 1a of the base 1. A single first fixed contact 48 is caulked and fixed on the upper part of the first fixed contact piece 45. A cutout portion 49 is formed at a side edge of the first fixed contact piece 45, and a lower portion thereof is a first press-fit portion 50 wider than an upper portion of the cutout portion 49. The first press-fitting portion 50 has first press-fitting protruding portions 51 protruding on both sides in the thickness direction.
Are formed, it is possible to press-fit into the first press-fit receiving portions 8a and 8b of the base 1, respectively. Further, a lower end of the first fixed contact piece 45 has a notch 45a.
The first terminal portion 52 is formed on one side.

As shown in FIG. 9A, the second fixed contact piece 46 is formed by pressing a conductive material and forming a notch 46a at the center.
Are formed into two branches, and a bent portion 53 that is bent substantially at a right angle is formed at the lower end thereof. The upper part of the second fixed contact piece 46 is
4 is a fixed contact portion 55 to be fixed by caulking. The lower side of the fixed contact portion 55 is a narrow second press-fit portion 56. The second press-fitting portion 56 can be press-fitted into the second press-fitting receiving portions 9a and 9b of the base 1 by forming second press-fitting protruding portions 57 protruding in the thickness direction at both upper edge portions thereof. It has become. Further, a second terminal portion 58 extending substantially at a right angle is formed at the tip of the one bent portion 53 so as to penetrate the second insertion hole 15 of the base 1 and protrude downward.

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. It comprises the parts 60a and 60b.

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. A movable contact 64 is caulked and fixed to the movable contact portion 62 so as to be located on both surfaces.
A lock receiving portion 65 having a semicircular inner edge is formed on the upper side edge of each drive piece 63.
The locking projections 41 of the card 39 are locked to the locking receiving portions 65, respectively. On the other hand, the lower half of the contact piece 59 is separated into a pair of legs 45a and 45b by a central cutout 66. As described above, the contact piece portion 59 can reduce the force required for driving the drive piece 63 by the cutout portion 61 and the cutout portion 66, and is evenly and stable by the drive pieces 63 provided on both sides. An action can be obtained. The terminal 6
The reference numerals 0a and 60b are caulked and fixed to the legs 45a and 45b separated by the notches 66 of the contact piece 59, respectively. The base 1 is connected to one terminal 60a.
A third terminal portion 60c penetrating through the third insertion hole 22a is formed.

Each of the contact pieces 4 is a single-pole type having the above-mentioned single contact, as well as FIGS.
(b), 1 shown in FIG.
There are a pole type and a two pole type which is divided into two as shown in FIGS. 8 (c), 9 (c) and 10 (c). However, any of these contact pieces 4 can be assembled to the base 1 having the same configuration as described above. The two contact pieces 4
Is different only depending on whether the image is divided into two or not, and is completely the same until the image is divided into two. Therefore, except for the final cutting or cutting step, all can be manufactured on the same manufacturing line, and there is no extra cost due to the difference in type. Each of the one-pole type contact pieces 4 has a pair of terminals for high power (see FIG. 3B) and one terminal for low power (FIG. 3C). See).

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
0 (first press-fitting protrusion 51) is press-fitted into the first press-fitting receiving portions 8a and 8b of the base 1 from above, and the terminal portion 52 is protruded from the insertion hole 14b to be assembled. The second fixed contact piece 46 has a second press-fitting portion 56 (second press-fitting protrusion 5
7) is press-fitted into the press-fitting groove 19 formed in the third press-fitting receiving portion 16 of the base 1 from above, and the terminal portion 58 is protruded from the insertion hole 22b to be assembled. At this time, the bending portion 5
3 is disposed on the thin portion 7 and does not protrude from the rib 20. The movable contact piece 47 is assembled by press-fitting the terminal portions 60a, 60b into the second press-fitting receiving portions 9a, 9b of the base 1 from above, and projecting the terminal portions 60c from the insertion holes 15. In this manner, all of the contact pieces 4 can be assembled from above the base 1,
Since it is not necessary to change the direction, it is possible to carry out efficiently.

When the mounting 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. Here, one end of the hinge spring 36 is inserted into an insertion portion between the base 1 and the electromagnet block 2. At this time, the bent portion 36a of the hinge spring 36 enters the groove 23a of the base 1, and the bent portion 36a
When the side surface a contacts the outer inner surface 23c of the groove 23a, positioning in the width direction is performed. The movable iron piece 30 is rotatably supported by the locking claw 37 being locked in the locking recess 23 a of the base 1.

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 contact 64 is closed to the second fixed contact 54 of the second fixed contact piece 46 by the elastic force of the movable contact piece 47 itself. At this time, as described above, the guide portion 18 provided on the base 1
The movement range of the card 39 is regulated by the
The amount of pushing of the movable contact 64 with respect to the second fixed contact 54 can be kept constant, and desired contact 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 embodiment,
Although the single-contact type single-contact type contact piece 4 shown in FIGS. 8 (a), 9 (a) and 10 (a) is assembled,
By assembling the contact piece 4 having the configuration shown in FIGS. 8B, 9B and 10B, a single-pole twin contact can be obtained. In addition, by assembling the contact pieces 4 having the configurations shown in FIGS. 8C, 9C and 10C, a two-pole type can be obtained as shown in FIG.

In the case of the two-pole type shown in FIG. 11, as shown in FIGS. 12 and 13, the first groove portion is provided between the bent portions 53 of the second fixed contact pieces 46a and 46b on the upper surface of the base 1. 69, and the first groove 6 is formed on the bottom surface of the insulating member 3.
It is preferable that the second groove 70 is formed at a position opposed to the second groove 9. Thereby, even if the base 1 is configured to be narrow, it is possible to secure a sufficient creepage distance between the two bent portions 53.
However, even if the groove portions 69 and 70 are formed of a ridge that engages with one of the remaining grooves, a sufficient creepage distance can be similarly obtained.

In the above embodiment, the hinge spring 36 integrated with the movable iron piece 30 is configured as shown in FIG. 5, but may be configured as shown in FIGS. 14 and 15.

In FIG. 14, the bent portion 71 formed on the hinge spring 70 is formed by bending both side edges downward at a substantially right angle and further bending a part of the bent portion inward to form an elastic locking portion 72. It has a configuration. On the other hand, the groove 73 formed in the base 1 is formed such that the outer inner surface 73a contacts the outer surface of the bent portion 71 and the inner inner surface 73b elastically deforms the elastic locking portion 72 outward. In addition, the groove 73 has an elastic locking portion 7 inside the base 1.
A lock receiving portion 74 is formed in which the lock member 2 returns to its shape and is locked. Thereby, the movable iron piece 3 is formed only by the bent portion 71.
It is possible to perform not only the positioning of 0 but also the prevention of falling off. Further, since the positioning can be performed by the outer surface of the bent portion 71, there is no generation of resin dust due to the sliding contact of the burr.

In FIG. 15, the bent portion 81 formed on the hinge spring 80 has a configuration in which a tongue piece formed by cutting out a substantially L-shape from both side edges is bent obliquely downward. On the other hand, the groove 82 formed in the base 1 is
Abuts against the outer edge of the bent portion 81, and the bottom surface 82b is formed so as to elastically deform the bent portion 81. A locking recess 83 is formed in the bottom surface 82b of the groove 82 so that the bent portion 81 returns to its shape and is locked. Thus, as in the case shown in FIG. 14, not only the positioning of the movable iron piece 30 but also the prevention of falling off can be performed by only the bent portion 81.

[0042]

As is apparent from the above description, according to the electromagnetic relay of the present invention, the bent portion guided by the guide portion is formed on at least one side edge of the hinge spring provided on the movable iron piece. The hinge spring is reinforced by the bent portion and does not deform when inserted into the insertion portion. Further, since the bent portion is guided by the guide portion, the hinge spring is not inserted obliquely. Furthermore, since the edge of the hinge spring where burrs are generated is located inside and the curved surface is guided by the guide portion, no resin waste is formed.

[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;

FIG. 11 is a perspective view of an electromagnetic relay according to another embodiment.

FIG. 12 is a sectional view of FIG.

FIG. 13 is a perspective view of the insulating member of FIG. 11;

FIG. 14 is an exploded perspective view (a) and a perspective view (b) of a movable iron piece according to another embodiment.

FIG. 15 is an exploded perspective view (a) and a perspective view (b) of a movable iron piece according to another embodiment.

FIG. 16 is an exploded perspective view of an electromagnetic relay according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Electromagnetic block 7 ... Thin part 23a ... Locking recessed part (locking receiving part) 23b ... Groove part (insertion part) 30 ... Movable iron piece 36 ... Hinge spring 36a ... Bending part 37 ... Locking claw

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Asao Omron Kumamoto Co., Ltd. 1110, Oazagi, Yamaga-shi, Kumamoto Prefecture Inside

Claims (3)

[Claims] An electromagnet block provided on a base is excited.
An electromagnetic relay for demagnetizing, rotating a movable iron piece and driving a movable contact piece to open and close a movable contact of the movable contact piece with a fixed contact of a fixed contact piece disposed oppositely, wherein the base and the electromagnet block And a locking receiving part and a guide part are provided on one of the inner surfaces constituting the inserting part, and the movable iron piece is inserted into the inserting part, and the locking receiving part An electromagnetic relay, comprising: a hinge spring having a locking portion for locking the hinge spring; and a bent portion guided by the guide portion is formed on at least one side edge of the hinge spring. 2. The electromagnetic relay according to claim 1, wherein the bent portion has a curved surface guided by the guide portion. 3. The electromagnetic relay according to claim 1, wherein the locking portion is formed in the bent portion.