JPH11134997A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide monostable operation of an electromagnetic relay without requiring complicated manufacturing work. SOLUTION: This electromagnetic relay is provided with an iron core on which a coil 3 is wound to form magnetic pole parts in both ends; an armature 6 having magnetic pole parts 6a, 6b in both end parts in the longitudinal direction and swung due to the magnetic pole parts 6a, 6b to be attracted to or released from the magnetic pole parts in both ends of the iron core; a permanent magnet 4 which, together with the iron core and the armature 6, forms magnetic routes of magnetic fluxes generated by excitation of coil 3; a swinging member 9 which swings together with the armature 6; a first movable spring 7e extended along the longitudinal direction of the armature 6 from one end of the swinging member 9 and provided with a first movable contact 7d; a second movable spring 8d extended along the longitudinal direction of the armature 6 from the other end of the swinging member 9 and provided with a second movable contact 8c; and a base 10 provided with a first fixed contact 10e and a second fixed contact 10f with or from which the first movable contact 7d and the second movable contact 8c are brought into contact or parted, respectively, following the swinging movement of the swinging member 9. In this case, the first movable spring 7e is produced so as to have higher toughness in the extended root part than the second movable spring 8d.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called balance armature type electromagnetic relay in which an armature is movable with a central shaft swingably supported.

[0002]

2. Description of the Related Art Conventionally, as this type of electromagnetic relay, FIG.
There are the following. This product has magnetic pole parts A ₁ and A at both ends.
A U-shaped iron core A wound with a coil B so as to be ₂ ,
The magnetic pole portions C ₁ and C ₂ provided at both ends in the longitudinal direction are attracted and released by the magnetic pole portions A ₁ and A ₂ at both ends of the iron core A, respectively. A permanent magnet D which is magnetized to the poles and one end of which is disposed so as to be in contact with an intermediate portion between both end magnetic pole portions A ₁ and A ₂ of the iron core A and forms a magnetic path together with the iron core A and the armature C; Oscillating member E that oscillates with armature C
A first movable spring F provided with a _first movable contact F ₁ extending from one end of the swing member E along the longitudinal direction of the armature C and serving as a normally open contact; D the other end a second movable spring G which armature second movable contact G ₁ to be extended has been normally closed side contacts so that along the longitudinal direction of the C is provided from the swing of the swing member E first movable contact F ₁ is provided with a base H the first fixed contact H ₁ and a second movable contact G ₁ is provided with a second fixed contact H ₂ approaching and moving away from approaching and moving away from together. Specifically, the iron core A has the other end cross-sectional area of one magnetic pole portion A ₁ magnetic pole portion A ₂
It is formed smaller than the cross-sectional area on the side.

Next, the operation will be described in detail. When the coil B is energized in the specified direction, the armature changes according to the direction of magnetization.
In C, one end magnetic pole part C ₁ is attracted by one end magnetic pole part of the iron core and swings, and the swinging member D swings together with the armature C, and the swinging member D
One movable contact F ₁ of one movable spring F extending from one end of
There as well as contact with one fixed contact H ₁ of the base H, while the movable contact G ₁ of the other movable spring G which extends from the other end of the swinging member D is separable from one fixed contact of H ₂ based H.

When the energization is stopped, the magnetic pole portion A ₁ of one end of the iron core A ₁
Since the cross-sectional area of the side is smaller than the cross-sectional area of the other end magnetic pole portion A ₂ side, so that a predetermined and away a predetermined state, and a so-called monostable operation, the armature C is the The movable contact F ₁ is separated from the fixed contact H ₁ of the base H and the other movable contact G of the other movable spring G extended from the other end of the swing member D. ₁ is brought into contact with one fixed contact of H ₂ based H.

[0005]

In the above-mentioned conventional electromagnetic relay, an iron core A is required for monostable operation.
, The cross-sectional area of one magnetic pole portion A ₁ side must formed smaller than the cross-sectional area of the other end magnetic pole portion A ₂ side, which is troublesome that it takes to manufacture.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide an electromagnetic relay which can be operated in a monostable manner without troublesome production.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 is provided with an iron core having a coil wound so that both ends become magnetic pole portions, and provided at both ends in a longitudinal direction. The armature that is swung when the magnetic poles are attracted and released by the magnetic poles at both ends of the iron core, the permanent magnet that forms a magnetic path for magnetic flux generated by exciting the coil together with the iron core and the armature, and rocks with the armature A swinging member, a first movable spring extending from one end of the swinging member along the longitudinal direction of the armature and having a first movable contact, and a longitudinal armature from the other end of the swinging member. A second movable spring that extends in the direction and is provided with a second movable contact, a first fixed contact and a second movable contact that the first movable contact contacts and separates with the swing of the swing member And a base having a second fixed contact with which the second fixed contact comes and goes. Movable spring of, are a configuration in which the rigidity of the extension 設根 former portion is larger than the second movable spring.

According to a second aspect of the present invention, in the first aspect of the present invention, the first movable spring is provided with an overlapped portion by folding back at the extended base portion, so that the first movable spring is more resilient than the second movable spring. Also, the rigidity is increased.

According to a third aspect of the present invention, in the first aspect of the present invention, the first movable spring and the second movable spring are provided with an overlapped surface by folding back at the extended base portion. In order to increase the rigidity of the extended root portion of the first movable spring than that of the second movable spring,
A projection is provided on at least one of the overlapping surfaces of the first movable spring and the second movable spring.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 1 denotes an iron core, which is formed of a magnetic material and has a substantially U-shaped cross section with the leg portions at both ends serving as magnetic pole portions 1a and 1b. Reference numeral 2 denotes a coil bobbin, which is formed in a substantially cylindrical shape having a through hole in the axial direction, and has flanges 2a and 2b provided at both ends to partition a winding space 3a of the coil 3, and further includes a winding space 3a. A partition 2c is provided to divide the partition. Iron core
1 passes through the through hole of the coil bobbin 2, the coil 3 is wound through the coil bobbin 2 in the winding space 3a of the coil 3 partitioned by the two flanges 2a, 2b and the partition 2c. It will be. In the coil bobbin 2, a coil terminal 2d connected to the coil 3 protrudes from the other end flange 2b.

Reference numeral 4 denotes a permanent magnet which is formed in a substantially rectangular parallelepiped shape.
One end 4a is magnetized so as to have an N pole, and the other end 4b is magnetized so as to have an S pole.

Reference numeral 5 denotes an insulating member, which is formed of an insulating material such as a resin material and has a substantially U-shaped cross section by protruding leg pieces 5a at both ends in the longitudinal direction. The leg piece 5a is press-fitted and fixed in a press-fitting hole 2e formed in the coil bobbin 2. This insulating member 5
A through-hole 5b having a rectangular opening cross section through which the permanent magnet 4 penetrates is provided at the center, and opposing pieces 5c facing each other are provided on both sides of the center in the longitudinal direction with elasticity. Each of the opposing pieces 5c is pushed into the engaging projection 2f provided on the partition 2c of the coil bobbin 2.
An engagement hole which engages with the elasticity of each of them to form an engagement means 20 together with the engagement projection 2f so as to be sandwiched from the outside.
5d is provided. The insulating member 5 constitutes a coil block 30 together with the iron core 1, the coil bobbin 2, the coil 3, and the permanent magnet 4.

Reference numeral 6 denotes an armature, which is formed of a magnetic material into a substantially rectangular flat plate shape, and magnetic pole portions 6a and 6b provided at both ends in the longitudinal direction are attracted to both magnetic pole portions 1a and 1b of the iron core 1, respectively. A swing fulcrum 6c having a semicircular convex section is provided at the center on one side so as to be released, and is in contact with the permanent magnet 4. The swing fulcrum 6c has its semicircular center coincident with the central axis X passing through the center in the longitudinal direction.

Numeral 7 denotes a first spring member, which is made of a thin metal plate such as a copper alloy, and has one opposing spring 7a and the other opposing spring 7b longer than the one opposing spring 7a as shown in FIG. 2 (a). Thus, as shown in FIG. 3B, a substantially overlapped portion 7c is provided at the base end of the opposing spring 7a by folding back, as shown in FIG. It has been. In the first spring member 7, a first movable contact 7d serving as a normally open contact is fixed to a forked portion provided at each of the distal ends of the one opposing spring 7a and the other opposing spring 7b.

Reference numeral 8 denotes a second spring member, which is made of a thin metal plate such as a copper alloy and has a substantially opposed U-shaped spring 8a having one opposing spring 8a and the other opposing spring 8b longer than the one opposing spring 8a. Have been. The second spring member 8 has a one-sided spring 8a
A second movable contact 8c serving as a normally-closed contact is fixed to a forked portion provided at the tip of the other opposing spring 8b.

Reference numeral 9 denotes an oscillating member, and protrusions 9a, 9a which are passed through the through holes 6d, 6d formed in the armature 6 and are heat-welded are provided with the armature.
6 along the longitudinal direction. This swing member 9
The first spring member 7 and the second spring member 8 are formed two by two, and the base ends thereof are integrally formed to form a movable spring block 40. One of the opposed springs 7a of the first spring member 7 is A first movable spring 7e is provided extending from one end along the longitudinal direction of the armature 6, and a first opposing spring of the second spring member 8 is provided.
A second movable spring 8d extends from the other end along the longitudinal direction of the armature 6 as a second movable spring 8d. Since the first movable spring 7e is provided with the above-mentioned overlapping portion 7c and is thick,
The rigidity of the extended root portion is greater than that of the movable spring 8d.

Reference numeral 10 denotes a base, which is formed in a substantially plate shape from a resin material, and is provided with insertion holes 10a for inserting the coil terminals 2d on both sides of one end in the longitudinal direction thereof. The erected portions 10b, 10b are erected, and on both sides of the central portion in the longitudinal direction, the supported portions 9 having a semicircular cross section provided on the swinging member 9 are provided.
b, 9b swingably supporting section 10c with a semicircular opening section
Erected portions 10d, 10d are provided.

The base 10 is connected to an adjacent first movable contact.
First fixed contacts 10e, 10e contacting and separating from 7d, 7d are respectively provided at one end in the longitudinal direction, and second fixed contacts 10f, 10f contacting and separating from adjacent second movable contacts 8c, 8c are provided. Each is provided at the other end in the longitudinal direction. Between these first fixed contacts 10e, 10e and second fixed contacts 10f, 10f
Insulation is provided by providing an insulating wall 10g. Further, the coil 3 is engaged with the first and second fixed contacts 10e, 10f and the first and second movable contacts 7d, 8c and the coil 3 to be attached to the coil bobbin 2. The insulating member 5 is partitioned and insulated.

The base 10 includes first to third terminal strips 10.
h, 10j, and 10k are provided. Specifically, the first terminal strip
10h is the first fixed contact 10 provided outside the insulating wall 10g.
e, the second terminal piece 10j is connected to a second fixed contact 10f provided outside the insulating wall 10g, and the third terminal piece 10k is connected to the insulating wall 10g.
g, first and second fixed contacts 10e, 10f provided inside
Connected to each other.

Reference numeral 11 denotes a case, a coil block 30, and an armature.
After the movable spring block 40 and the movable spring block 40 are mounted on the base 10, they are fitted to the base 10 to cover them.

Next, the operation will be described. When the coil 3 is energized in the specified direction, the armature 6 swings by the magnetic pole part 6a of the iron core 1 being attracted to the magnetic pole part 1a of the iron core 1 in accordance with the direction of magnetization, and the rocking member 9 moves together with the armature 6 Swing, swing member 9
One opposing spring 7a of a first spring member 7 integrally formed with
That is, the first movable contact 7d of the first movable spring 7e extending from one end of the swing member 9 contacts the first fixed contact 10e, and the other opposed spring 7b of the first spring member 7 The first movable contact 7d abuts on the second fixed contact 10f. At this time, the second spring member 8 integrally formed with the swinging member 9 is formed.
The second movable contact 8c of the second movable spring 8d extending from the other end of the swinging member 9 separates from the second fixed contact 10f, Spring member
The second movable contact 8c of the other opposing spring 8b is separated from the second fixed contact 10f.

More specifically, in the first spring member 7, the other opposing spring 7b is formed longer than the one opposing spring 7a, and also in the second spring member 8, the other opposing spring 8b is formed longer than the one opposing spring 8a. As a result, the first movable contact 7d of the one opposing spring 7a of the first spring member 7 is moved to the first fixed contact 7d after the first movable contact 7d of the other opposing spring 7b, as shown in FIG. 10e, and the one opposing spring 8a of the second spring member 8
The second movable contact 8c is separated from the second fixed contact 10f after the second movable contact 8c of the other opposing spring 8b.

When the energization is stopped, the first movable spring 7e
Since the rigidity of the base of the extension is greater than that of the second movable spring 8d, the armature 6 performs a so-called monostable operation so as to be in a predetermined contact / separation state. The first movable member 7e of the first movable member 7e extends from one end of the first movable member 7a. The movable contact 7d is separated from the first fixed contact 10e, and the first movable contact 7d of the other opposing spring 7b of the first spring member 7 is separated from the first fixed contact 10e. At this time, one opposing spring 8a of the second spring member 8 integrally formed with the swing member 9, that is, the second movable spring 8d extending from the other end of the swing member 9
The second movable contact 8c contacts the second fixed contact 10f, and the second opposing spring 8b of the second spring member 8 contacts the second movable contact 8c.
The movable contact 8c contacts the second fixed contact 10f.

More specifically, in the first spring member 7, the other opposing spring 7b is formed longer than the one opposing spring 7a, and also in the second spring member 8, the other opposing spring 8b is formed longer than the one opposing spring 8a. Thus, the first movable contact 7d of the one opposing spring 7a of the first spring member 7 is separated from the first fixed contact 10e after the first movable contact 7d of the other opposing spring 7c, The second movable contact 8c of the one opposing spring 8a of the spring member 8 abuts on the second fixed contact 10f after the second movable contact 8c of the other opposing spring 8b.

Next, a second embodiment of the present invention will be described below with reference to FIGS. Note that members having substantially the same functions as those of the first embodiment are denoted by the same reference numerals, and only different points from the first embodiment will be described. In the first embodiment, the overlapping portion 7c is provided only in the first movable spring 7e, and the rigidity of the extended root portion of the first movable spring 7 is increased. Movable spring 8
Is provided with an overlapping portion 8e, and an overlapping surface 7f of the first movable spring 7 is provided.
Is provided with the protrusion 7g only on the first movable spring.
The rigidity of the base of the extension is increased.

In the electromagnetic relays according to the first and second embodiments, the first movable spring 7e, whose rigidity of the extended base portion is larger than that of the second movable spring 8d, is different from the second movable spring 8d.
8d, the first movable spring 7e
In order for the first movable contact 7d provided on the second movable spring 8d to come into contact with the first fixed contact 10e,
A larger force is required to swing the armature 6 in the contact contact direction than when the movable contact 8c contacts the second fixed contact 10f, and only the magnetic flux generated by the permanent magnet 4 is generated. At the time of energization, a state in which a small force is required to swing the armature 6 in the contact contact direction, that is, a state in which the second movable contact 8c contacts the second fixed contact 10f. Therefore, unlike the conventional example, the monostable operation can be performed without taking the trouble of forming the cross-sectional area of the one end magnetic pole portion 1a side of the iron core 1 smaller than the cross-sectional area of the other end magnetic pole portion 1b side. .

The insulation between the coil 3 and the first and second fixed contacts 10e, 10f and the first and second movable contacts 7d, 8c is controlled by the first and second fixed contacts 10e, 10f and The first and second movable contacts 7d and 8c are secured by an insulating member 5 provided to partition between the coil 3 and the first and second movable contacts 7d and 8c.
Fixed contacts 10e, 10f and first and second movable contacts 7d, 8c
It is not necessary to secure a distance between the coil 3 and the coil 3 equal to or more than a predetermined dimension, and the size can be reduced.

Also, since it is a so-called double-sided electromagnetic relay which is opened and closed by the first movable contacts 7d, 7d and opened and closed by the second movable contacts 8c, 8c, it is a first-order electromagnetic relay rather than a single-sided electromagnetic relay. This makes it easy to ensure insulation between the fixed contact 10e and the first movable contact 7d and between the second fixed contact 10f and the second movable contact 8c.

In the first spring member 7, the first fixed contact 10e is provided after the first movable contact 7d of the other opposing spring 7b.
The first movable contact 7d of the opposed spring 7a can be used as a movable contact for opening and closing the load, and the first movable contact 7d of the opposed spring 7b can be selectively used as an energizing contact. Similarly, in the second spring member 8, the other opposing spring
The second movable contact 8c of the opposing spring 8a is used as a load switching contact while the second movable contact 8c of the opposing spring 8a comes into contact with and separates from the second fixed contact 10e after the second movable contact 8c of the other opposing spring 8b. The contact 8c can be properly used as a current-carrying contact. Therefore, the first and second movable contacts 7d, 8 serving as load switching contacts are provided.
It is sufficient to increase the plating thickness of silver etc. only for c.

Further, in the electromagnetic relay of the first embodiment, the first movable spring 7e has an increased rigidity by being provided with an overlapped portion 7c by folding back at an extended root portion. Since the thickness of the movable spring 7e itself is not increased, the effect of eliminating the trouble of manufacturing can be further achieved.

In the electromagnetic relay according to the second embodiment, the protrusion 7g is provided on the overlapped surface 7f by folding, so that the rigidity of the extension root portion can be easily increased. In addition, by appropriately adjusting the height of the projection 7g, the degree of rigidity that greatly affects the monostable operation can be changed, so that the degree of freedom in design can be increased.

The kicking action of the projection 7g can prevent sticking and small welding between the first movable contact 7d and the first fixed contact 10e.

The provision of the projection 7g increases the rigidity when the contact pressure between the first movable contact 7d and the first fixed contact 10e starts to be generated. Contact bounce can be suppressed.

In the first embodiment, the first movable spring
7e has a rigidity greater than that of the second movable spring 8d by being provided with an overlapped portion 7c formed by folding back at the extension base portion. For example, the extension portion of the extension base portion of the first movable spring 7e itself is provided. The same effect can be obtained even when the thickness is increased and the rigidity is made larger than that of the second movable spring 8d.

Further, in both the first and second embodiments,
The movable contacts 7d, 7d of the first spring member 7 and the second spring member 8
Are opened and closed by the second movable contacts 8c, 8c, respectively.
Although it is a so-called double-sided electromagnetic relay, even if it is not a double-sided electromagnetic relay, as in the conventional example, one end of the magnetic pole
The monostable operation can be performed without taking the trouble of forming the cross-sectional area on the 1a side smaller than the cross-sectional area on the other end magnetic pole portion 1b side.

In each of the first and second embodiments,
This is a so-called 2T electromagnetic relay having two pairs of first movable contacts 7d, 7d and second movable contacts 8c, 8c.
Even if it is not an electromagnetic relay, the cross-sectional area of one end of the magnetic pole 1a of the iron core 1 is made smaller than the cross-sectional area of the other end of the magnetic pole 1b, as in the conventional example, without the trouble of being monostable. You can make it work.

Further, in both the first and second embodiments,
In the first spring member 7, the other opposing spring 7b is changed to the one opposing spring 7a.
The second opposing spring 8b is formed longer than the one opposing spring 8a in the second spring member 8 as well. For example, when the load switching contact and the energizing contact are not properly used, FIG. As shown in FIG. 8, the length may be the same.

In the second embodiment, the first movable spring
The protrusion 7g is provided only on the overlapped surface 7f of the first movable spring 7 to increase the rigidity of the extended base portion of the first movable spring. However, the protrusion 7g is provided on the overlapped surface 7f of the first movable spring 7e. Are provided, and projections are provided on the overlapping surface of the second movable spring 7e. By changing the height of these projections, the rigidity of the extended base portion of the first movable spring 7e is increased. You may.

[0040]

According to the first aspect of the present invention, the first movable spring in which the rigidity of the extended base portion is larger than that of the second movable spring is less likely to bend than the second movable spring. From the first movable contact provided on the first movable spring
In order to swing the armature in the contact contact direction, when the second movable contact provided on the second movable spring contacts the second fixed contact. When a large force is required and only a magnetic flux is generated by the permanent magnet, a state in which only a small force is required to swing the armature in the contact direction, that is, the second movable contact is The second fixed contact comes into contact with the second fixed contact. Therefore, the monostable operation can be performed without the trouble of forming the cross-sectional area of one end of the iron core at the magnetic pole portion side smaller than the cross-sectional area of the other magnetic pole portion side as in the conventional example.

According to the second aspect of the present invention, the first movable spring has increased rigidity by being provided with an overlapped portion at the base of the extension, and the first movable spring itself has a large thickness. Therefore, the effect of the invention described in claim 1 can be further enhanced because the time and effort for manufacturing is reduced.

According to the third aspect of the present invention, in addition to the effect of the first aspect of the present invention, since the projection is provided on the overlapped surface by folding, the rigidity of the extending base portion can be easily increased. In addition, by appropriately adjusting the height of the projection, the degree of rigidity that greatly affects the monostable operation can be changed, so that the degree of freedom in design can be increased.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a processing procedure of the above spring member.

FIG. 3 is a plan view showing the same movable spring block.

FIG. 4 is a side sectional view of the same.

FIG. 5 is a partial side view showing a contact / separation state of the contact point.

FIG. 6 is a perspective view showing a movable spring block according to a second embodiment of the present invention.

FIG. 7 is a perspective view showing a processing procedure of the spring member.

FIG. 8 is a plan view showing a movable spring block in which both opposing springs have the same longitudinal dimension.

FIG. 9 is an exploded perspective view showing a conventional example.

[Explanation of symbols]

 1 Iron core 1a, 1b Magnetic pole part 3 Coil 4 Permanent magnet 6 Armature 6a, 6b Magnetic pole part 9 Swinging member 7c Overlapping part 7d First movable contact 7e First movable spring 7f Projection 7g Overlapping surface 8c Second movable Contact 8d Second movable spring 8e Overlapping portion 8f Overlapping surface 10 Base 10e First fixed contact 10f Second fixed contact

Claims (3)

[Claims] 1. An iron core on which a coil is wound so that both ends become a magnetic pole portion, and an armature which swings when the magnetic pole portions provided at both ends in the longitudinal direction are attracted and released by the magnetic pole portions at both ends of the iron core. A permanent magnet serving as a magnetic path of a magnetic flux generated by exciting the coil together with the iron core and the armature; a swinging member swinging with the armature; and extending from one end of the swinging member along the longitudinal direction of the armature. A first movable spring provided with a first movable contact, and a second movable contact provided with a second movable contact extending from the other end of the swing member along the longitudinal direction of the armature. An electromagnetic system comprising: a movable spring; and a base provided with a first fixed contact and a second fixed contact with which a first movable contact contacts and separates with the first movable contact as the swing member swings. In the relay, the first movable spring has a greater rigidity at an extended root portion than the second movable spring. Electromagnetic relay, characterized in that rot. 2. The rigidity of the first movable spring is made greater than that of the second movable spring by providing an overlapped portion by folding back at the extension base portion. Electromagnetic relay as described. 3. The first movable spring and the second movable spring are provided with an overlapped surface by folding back at the extended base portion, and the first movable spring and the second movable spring are more than the second movable spring in the first movable spring. The projection according to claim 1, wherein at least one of the first movable spring and the second movable spring is provided with a projection so as to increase the rigidity of the extension root portion of the movable spring. Electromagnetic relay.