JP2002170469A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric relay which is excellent in assembling characteristics and operation characteristics of a movable block. SOLUTION: Attracting parts 26a and 26b extended on the side of a movable block 3 are formed at an iron core 21. A movable iron piece 33 is so supported that one end part is rotatable with the attracting part 26b of the iron core 21 as a support point. A bent part 37 so bent as to follow the one end part of the movable iron piece 33 is formed at a movable contact piece 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay for driving a movable block beside a coil block.

[0002]

2. Description of the Related Art Conventionally, for example, the following configuration has been proposed as an electromagnetic relay. Japanese Patent Application Laid-Open No. 2000-222990 discloses that an attraction portion of an iron core is extended laterally from a coil block mounted on an upper surface of a base, and a movable iron piece disposed below is driven to be disposed above. An electromagnetic relay that opens and closes a contact by operating a movable contact piece is disclosed.

[0003] Japanese Patent Publication No. 4-42766 discloses that an armature is driven by a suction part of an iron core extending downward from an electromagnet.
An electromagnetic relay that opens and closes a contact is disclosed.

[0004]

SUMMARY OF THE INVENTION However, Japanese Patent Application Laid-Open
In the electromagnetic relay described in Japanese Patent Application Publication No. 00-222990, since the movable iron piece and the movable contact piece are arranged above and below the iron core, the structure is poor in assemblability and difficult to stabilize the operation.

Further, the electromagnetic relay described in Japanese Patent Publication No. 4-42766 has a problem in that it is difficult to structure the electromagnetic relay because of its small size, and it also lacks operational stability.

Accordingly, an object of the present invention is to provide an electric relay having excellent assemblability and operating characteristics of a movable block.

[0007]

According to the present invention, as a means for solving the above-mentioned problems, there are provided a coil block formed by winding a coil around an iron core via a spool, and a coil disposed on a side of the coil block. In an electromagnetic relay provided with a movable block including a movable iron piece and a movable contact piece, the iron core includes a suction portion extending laterally at both ends, and the movable iron piece has one end portion provided with the suction portion. And the movable contact piece is provided with a bent portion bent along one end of the movable iron piece. With this configuration, when the coil block is excited, one end of the movable iron piece is attracted to the one suction unit, and the movable block rotates around the other suction unit. At this time, the pivot point of the movable iron piece,
The turning fulcrum of the movable contact piece is close to the movable contact piece because the movable contact piece has a bent portion. Therefore, the operation of the movable block becomes stable.

The base has an electric connection portion to which the movable contact piece is electrically connected, and the movable contact piece has a structure in which a flat portion electrically connected to the electric connection portion is partially cut off. Since the electric connection portion and the flat portion of the movable contact piece can be melted and joined together, it is preferable in that a good and strong connection state can be formed.

The base has a notch in a side wall near the electric connection portion, and the movable contact piece has a second bent portion at one end thereof which engages with the notch. So that it is positioned in the longitudinal direction,
This is preferable in that the contacts can be reliably arranged to face each other with a simple configuration.

When the movable iron piece is provided with an inclined surface that is not in contact with the movable contact piece at both ends, it is possible to reliably avoid interference with the bent portion of the movable contact piece and to elastically deform the movable contact side. This is preferable in that the range can be secured.

If a case is provided to cover the base, and a projection is provided on the ceiling surface of the case against the elastic force of the movable contact piece so as to press against the elastic force of the movable contact piece. This is preferable in that it can be configured.

When the electric connection portion is formed above the suction portion of the iron core by a predetermined dimension, the elastic force of the movable contact piece acts to reduce the contact pressure between the movable iron piece and the suction portion of the iron core, This is preferable because deterioration due to wear can be prevented.

[0013]

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 has a configuration in which a coil block 2 and a movable block 3 are accommodated in a base 1 and covered with a case 4.

As shown in FIG.
It is obtained by molding a synthetic resin material into a substantially box-like shape having a housing recess 6 which is surrounded by a, 5b, 5c, and 5d and opens upward. The housing recess 6 is divided into a first housing recess 8 for housing the coil block 2 and a second housing recess 9 for housing the movable block 3 by an insulating wall 7 provided at a central portion. The insulating wall 7 has projecting portions 10a and 10b formed at both ends toward the first housing recess 8 side.
Terminal holes 11 (one not shown) into which coil terminals 29 to be described later are inserted are provided at two places at the bottom corners of the first accommodation recess 8.
Are drilled respectively. The bottom surface of the second housing recess 9 is located above the first housing recess 8. A pedestal portion 12 is formed on one end side of the second housing recess 9. The fixed contact 13a is exposed in the pedestal portion 12 upward by press-fitting the contact terminal 13 into a terminal hole (not shown). Further, a first cutout 14 (corresponding to the opening of the present invention, which may be formed not only by the cutout shape but also by a through hole) is formed in the side wall 5c near the pedestal portion 12, as shown in FIG. As shown,
The operation state of the movable iron piece 33 can be detected from the side. On the other hand, the connection terminal 15 is press-fitted into a terminal hole (not shown) at the other end side of the second housing recess 9, so that the electrical connection portion 15a is exposed upward. A second notch 16 and a third notch 17 are formed in the side walls 5b and 5c near the electrical connection part, respectively. The second notch 16 is for positioning the end of the movable contact piece 34,
The third cutout 17 is a relief for a wall surface forming a concave portion 42 of the case 4 described later. Further, a projection 18 for guiding both edges of the movable contact piece 34 with the side wall 5c is formed near the electric connection portion 15a on the bottom surface of the second housing recess 9. In addition, locking portions 19 are formed on both end walls 5a and 5b of the base 1 at the upper edge of the central portion, respectively. Further, on the bottom surface of the base 1, seal holes 20 used at the time of sealing, which will be described later, are formed at the center portions on both ends. In addition, both lower side edges of the base 1 are chamfered.

The coil block 2 is, as shown in FIG.
A coil 23 is wound around an iron core 21 via a spool 22.

The iron core 21 has a configuration in which the iron core 21 is divided into two parts 24a and 24b. The iron cores 24a and 24b have the same shape and can be processed in the same process (die). Each iron core 24
On one end side (connection side) of each of the connection portions 25a, 24b, a stepped portion is provided with a tapered surface at an end for facilitating connection.
25b are formed, and leakage of magnetic flux is suppressed by surface contact with each other. The other ends of the core portions 24a and 24b are connected to the connecting portions 25a and 25
The suction portions 26a and 26b extend in a direction along the line b.

The spool 22 has flanges 27a, 27 at both ends.
b is connected by a substantially rectangular cylindrical body 28. The flanges 272 and 27b are open so that the coil terminals 29 are press-fitted into the terminal holes 29a on the side edges, and the opposite side edges and one end communicate with each other via the body 28. Collar 27
The thickness t on the lower side obtained by opening laterally is the same as the step between the bottom surface of the first housing recess 8 and the bottom surface of the second housing recess 9. Thereby, when the coil block 2 is disposed in the first accommodation recess 8,
The suction portions 26a and 26b of the iron core 21 are arranged on the bottom surface of the second housing recess 9 without gaps. A projecting ridge 30 projecting upward is provided at a boundary between the flanges 27a and 27b and the body 28.
a and 30b are formed. By forming the relief portions 31a and 31b by removing the central portions of the ridge portions 30a and 30b, the ends of the coil 23 wound around the body portion 28 can be easily pulled out to the upper surfaces of the flange portions 27a and 27b. . The side edges of the flanges 27a and 27b are cut out, and the projections 30a and 30b form guide recesses 32a and 32b. The protrusions 10a and 10b of the insulating wall 7 of the base 1 are engaged with the guide recesses 32a and 32b, respectively, so that the coil block 2 can be positioned.

The movable block 3 includes a movable iron piece 33 and a movable contact piece 34. The movable iron piece 33 is made of a strip-shaped magnetic plate, and has inclined surfaces 35a, 35
b are formed respectively. The inclined surface 35a is for providing a non-contact portion on the movable contact 36 side of the movable contact piece 34 described later to secure a length that can be elastically deformed. The inclined surface 35b is provided for the movable contact piece 34 described later. 1st bending part 3
7 to avoid interference.

One end of the movable contact piece 34 is separated into two branches, and a movable contact 36 is provided on the lower surface of each tip. Further, the other end of the movable contact piece 34 is bent in two stages, and the first bent portion 37 extends along one end of the movable iron piece 33,
The second bent portion 38 engages with the second notch 16 of the base 1 and is used for positioning in the longitudinal direction. A notch 40 is formed at the center of each edge of the flat portion 39 between both bent portions. Then, the flat portion 39 comes into contact with the electrical connection portion 15a of the connection terminal 15 to be electrically conducted, and both side edges are guided between the side wall 5c of the base 1 and the projection 18 to be positioned in the width direction. The width W1 of the intermediate portion 34a of the movable contact piece 34 is formed to be the same as the width W2 of the movable iron piece 33, so that the two can be accurately positioned.

As shown in FIG. 1, the case 4 has a substantially box shape with an open lower surface, and a pressing portion 41 (see FIG. 8) protruding from the top of the movable contact piece 34 protrudes from the ceiling surface. ing. Further, a concave portion 42 is formed at a corner of the upper surface of the case 4,
After the completion of the electromagnetic relay, the cylindrical portion 43 provided therein is melted to seal the inside. Standoffs 44 are protruded from lower edges of both side walls of the case 4 so that when an electromagnetic relay is mounted on a printed circuit board or the like, a predetermined gap can be formed between the printed circuit board or the like and the bottom surface of the base 1. ing.

The legs of the terminals 13, 15, 29 are bent so as to correspond to the positions of terminal holes (not shown) of a substrate or the like to be mounted.

Next, a method of assembling the electromagnetic relay having the above configuration will be described. The contact terminal 13 and the connection terminal 15 are attached to the base 1 by press fitting. The coil terminal 29 is press-fitted into the flanges 27a and 27b of the spool 22, and the coil 23 wound around the body 28 is wound around the upper end 29a. Then, the upper end 29a of the coil terminal 29 is
a, 27b are bent at substantially right angles along the upper surface. In this case, since the coil 23 is wound around the coil terminal 29 via the relief portions 31a and 31b of the ridges 30a and 30b, the coil 23 is hardly broken along the upper surfaces of the flanges 27a and 27b. Then, from both ends of the spool 22, the iron core portions 24a,
24b are respectively inserted. At this time, when the edge e1 of the core portion 24a comes into contact with the contact portion (not shown) of the spool 22, a slight gap is formed between the edge e2 of the core portion 24b and the spool 22. Like that. Therefore, the connecting portion tip e3 (or e3 ') of the iron core portion 24b abuts on the edge e4 (or e4') of the iron core portion 24a, and the surface contact range is constantly set to a stable value. In addition, iron core 2
1 is divided into two core portions 24a, 24b, so that the coil 23 is wound around the spool 22,
Can be attached, so that the suction portions 24a,
24b can be extended in the direction approaching each other from the side to increase the occupied area, and the winding range of the coil 23 can be widened so that the desired attractive force characteristics can be exhibited even in a small size. It is possible.

The completed coil block 2 is attached to the first receiving recess 8 of the base 1 from above. The coil terminal 29 is press-fitted into the terminal hole 11 of the base 1 and protrudes from the lower surface. When the coil block 2 comes into contact with the bottom surface of the first housing recess 8, the locking portion 19 is locked by locking to the upper surfaces of the flange portions 27 a and 27 b, so that the coil block 2 is prevented from coming off. In this state,
The protrusions 10a, 10b of the insulating wall 7 are
There is no backlash since each is engaged with and positioned at 32b. Moreover, the creepage distance between the coil 23 and the suction portions 26a and 26b of the iron core 21 is ensured by the insulating wall 7, and a desired insulating state is maintained. Further, each of the suction portions 26a and 26b of the iron core 21 is fixed to the fixed contact 1 on the second housing recess 9 side.
3a and the inside of the electrical connection 15a, FIG.
As shown in (1), they are located on substantially the same straight line. At this time, the electric connection part 15a is located in the same plane or slightly above the suction part 26b of the iron core 21. However,
This step is a value that does not impair the suction force between the movable iron piece 33 and the suction portion 26b.

Here, the movable contact piece 34 is fixed to the upper surface of the movable iron piece 33 by bonding, caulking, etc.
To form Then, the movable block 3 is disposed in the second accommodation recess 9 of the base 1. At this time, the movable block 3
Is the second of the movable contact piece 34, as shown in FIG.
The bent portion 38 is engaged with the second cutout portion 16 of the base 1, and the flat portion 39 is guided between the side wall 5 c and the projection 18 to be installed at a desired position. Therefore, the movable contact piece 34 and the electrical connection portion 15a of the connection terminal 15 are integrated by welding using the notch 40 of the flat portion 39. As a result, the movable contact piece 34 has a flat portion 39 with the electrical connection portion 15a.
And is electrically connected to the movable contact 36.
Are firmly positioned so as to be able to contact and separate from the fixed contact 13a. The operating state of the movable iron piece 33 is confirmed via the first cutout 13 of the base 1.

Finally, a case 4 is put on the base 1 to seal the bottom side. At this time, the sealing agent enters through the sealing hole 20 of the base 1 and the flange 27 of the coil block 2
a, 27b are joined to the base 1. Thereby, it is possible to reliably prevent the coil block 2 from rattling due to vibration or the like. Further, the cylindrical portion 43 of the case 4 may be used depending on the application.
Is sealed by heat sealing to complete the electromagnetic relay.

Next, the operation of the electromagnetic relay having the above configuration will be described. If the coil 23 is not energized and the coil block 2 is in the demagnetized state, the movable iron piece 33 rotates clockwise in FIG. Is separated from the fixed contact 13a. At this time, the movable block 3 has a case 4
Since the pressing portion 41 is pressed, there is no backlash, and the inter-contact distance is maintained at a constant value.

Here, when the coil block 2 is excited by energizing the coil 23, the tip of the movable iron piece 33 is attracted to the attracting portion 26a of the iron core 21, and the attracting portion 26b is used as a fulcrum in the counterclockwise direction in FIG. To rotate. At this time, the movable contact piece 34 is moved by the first bent portion 37 to the movable iron piece 3.
3 does not hinder the turning operation of the movable iron piece 33. Further, as described above, since the electric connection portion 15a is located in the same plane or slightly above the suction portion 26b of the iron core 21, the contact pressure between the movable iron piece 33 and the suction portion 26b is reduced. I have. Therefore,
The operating state of the movable iron piece 33 and the movable contact piece 34 is stabilized, and one end of the movable iron piece 33 and the suction portion 26 of the iron core 21 are
Is prevented.

[0028]

As is apparent from the above description, according to the present invention, since the movable contact piece has the bent portion bent along one end of the movable iron piece, the rotating state of the movable block can be reduced. Stabilize. In addition, since the coil block can be assembled simply by placing the coil block on the base and disposing the movable block beside the coil block, the assemblability is excellent.

[Brief description of the drawings]

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

FIG. 2 is a front view in a state where components other than the case of FIG. 1 are assembled.

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

FIG. 4 is an exploded perspective view of the coil block of FIG.

FIG. 5 is an exploded perspective view of the movable block of FIG.

FIG. 6 is a plan view in a state where components other than the case of FIG. 1 are assembled.

FIG. 7 is a perspective view in a state where components other than the case of FIG. 1 are assembled.

FIG. 8 is a front sectional view taken along the line AA in a state where the case is assembled in FIG. 6;

FIG. 9 is a sectional view taken along line BB of FIG. 6;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Coil block 3 ... Movable block 7 ... Insulating wall 8 ... 1st accommodation recess 9 ... 2nd accommodation recess 10a, 10b ... Protrusion 13 ... Contact terminal 14 ... 1st notch 15 ... Connection terminal 15a ... Electricity Connection portion 16: second cutout portion 17: third cutout portion 18 ... projection 19 ... locking portion 20 ... seal hole 21 ... iron core 22 ... spool 23 ... coils 24a, 24b ...
Iron cores 25a, 25b ... Connections 26a, 26b ...
Suction parts 27a, 27b ... Flange part 30 ... Protrusion part 31 ... Relief parts 32a, 32b ...
Guide recess 33: movable iron piece 34: movable contact piece 35a, 35b: inclined surface 36: movable contact 37: first bent portion 38: second bent portion 39: flat portion 40: notch 41: pressing portion

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mitsuhiro Kawai 801 Shidokoro Shiorikyo-dori Horikawa-Higashi-Irami-Fudodoucho, Shimogyo-ku, Kyoto, Japan Omron Corporation

Claims (6)

[Claims] 1. An electromagnetic apparatus comprising: a base provided with a coil block formed by winding a coil around an iron core via a spool, and a movable block disposed on a side of the coil block and including a movable iron piece and a movable contact piece. In the relay, the iron core includes a suction portion extending laterally at both ends, the movable iron piece is rotatably supported at one end with one of the suction portions as a fulcrum, and the movable contact piece, An electromagnetic relay, comprising: a bent portion bent along one end of the movable iron piece. 2. The base includes an electric connection portion to which the movable contact piece is electrically connected, and the movable contact piece has a flat portion partially cut away electrically connected to the electric connection portion. The electromagnetic relay according to claim 1, wherein: 3. The base has a notch on a side wall near the electrical connection portion, and the movable contact piece has a second end engaged with the notch at one end.
The positioning portion is positioned in a longitudinal direction with respect to the base by providing a bent portion.
Electromagnetic relay according to the item. 4. The electromagnetic relay according to claim 1, wherein the movable iron piece has an inclined surface that is not in contact with the movable contact piece at both ends. 5. A case that includes a case that covers the base, and a projection that presses against the elastic force of the movable contact piece is provided on a ceiling surface of the case. Item 2. The electromagnetic relay according to item 1. 6. The electromagnetic relay according to claim 2, wherein the electric connection portion is formed above a suction portion of the iron core by a predetermined dimension.