JPH0973849A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent what is called a bounce phenomenon from happening in which a fixed contact and a movable contact intermittently make opening/ closing actions while an armature is vibrating due to an impact when an electromagnetic relay works. SOLUTION: An object of reducing occurrences of bounce phenomenon for improving performances of an electromagnetic relay is achieved by providing a unidirectionally-coupling means 32a formed so as to be able to act with an armature and insulating support body 21a separated from each other. The unidirectionally-coupling means 32a comprising side walls 21c, 21d each equipped with a hook piece 3 on an end part of the insulating support body 21a and hook holes 37 provided in the armature, and the side walls 21c, 21d provided on the insulating support body 21a are adapted to be able to be hooked on the hook holes 37 provided in the armature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a balance armature type electromagnetic relay, and more particularly to a polarized electromagnetic relay in which bounce is prevented.

[0002]

2. Description of the Related Art As a conventional electromagnetic relay, there is one shown in FIGS. In this electromagnetic relay, a coil 69 is wound, and an electromagnet block 62 including an iron core 64 having magnetic poles 71, 71 at both ends and a permanent magnet 72,
Armature block 73, housing 51, and case 8
2 and 2. The armature block 73 includes an armature 75, an insulating support 79 attached to the lower surface of the armature 75, and a movable contact spring 76 provided on the insulating support 79. The movable contact spring 76 is arranged above the fixed contact joint portion 57 provided on the bottom surface of the housing 51 so as to project. Thus, the armature 75 and the movable contact spring 76 are integrated by the insulating support 79, and the support spring 78 extends from the inside of the insulating support 79 in the direction orthogonal to the longitudinal center of the movable contact spring 76. It is housed and fixed in the side wall 52 of the housing 51. When the coil 69 is excited in a predetermined direction, the armature 75 is integrated with the movable contact spring 76 via the insulating support 79, and the support spring 78 serves as a core and reversely swings with respect to the magnetic poles 71, 71. Move. Terminals such as a common terminal 58, a fixed contact terminal 56, and a coil terminal 60 are provided on the bottom surface of the housing 51. Reference numeral 82 is a case, which is fitted onto the housing 51. The armature block 73 and the electromagnet block 62 are mounted on the housing 51.

The housing 51 has a side wall 52 and is of a substantially box shape having an upper opening.
3 and the armature storage chamber 54, and one end of each terminal such as a fixed contact terminal 56, a common terminal 58, a coil terminal 60, etc., which is formed by pressing a conductive thin plate of copper alloy or the like into a desired shape. It is arranged so as to project downward from the bottom surface, and these terminal groups are insert-molded with synthetic resin or the like. One end of the fixed contact terminal 56 projects from the lower surface of the housing 51, and the other end is arranged at each of the four corners of the armature storage chamber 54.
A fixed contact 55 made of a bulky noble metal tip is electrically connected to a fixed contact terminal 56 by electric welding on the upper portion. One end of the common terminal 58 projects from the lower surface of the housing, and the other end is arranged at the longitudinal center of the side wall of the armature storage chamber 54 and the center of the partition wall 51a to form a common terminal joint 59. A support spring 78 of an armature block 73, which will be described later, is fixed to the common terminal joint portion 59 by electric welding. The coil terminal 60 has one end protruding from the lower surface of the housing 51 and the other end protruding from a recess in the side wall of the coil housing chamber 53.
To form A coil lead terminal 68 of an electromagnet block 62, which will be described later, is fixed to the coil terminal joint portion 61 by electric welding.

The electromagnet block 62 is composed of an electromagnet portion 63 and a permanent magnet 72. The electromagnet section 63 is
Further, it is composed of an iron core 64, a coil 69, and a coil lead-out terminal 68. The iron core 64 is formed of a magnetic material such as electromagnetic soft iron into a substantially U-shape. A spool 66 made of a molding material such as synthetic resin is provided at an intermediate portion thereof, and a molding material such as synthetic resin is provided at an end portion of the spool 66. Each of the collars 67 is provided, and both ends of the iron core 64 project laterally from the collar 67 to form the magnetic pole 71. The coil lead-out terminal 68 is formed of a conductive metal material into a substantially U shape,
Each of the flanges 67 is provided so as to project from the collar 67, and one end thereof is fixed to the coil terminal joint portion 61 of the housing 51 by electric welding and is electrically connected to the coil terminal 60. The coil 69 is wound around a spool 66 provided in an intermediate portion of the iron core 64, and a coil lead wire 70 is fixed to the other end of the coil lead terminal 68 by soldering, and the coil 69 is wound via the coil lead terminal 68. It is electrically connected to the terminal 60. The permanent magnet 72 has a substantially flat plate shape and is magnetized so that both ends have the same pole and substantially the center has different poles, and the permanent magnet 72 is provided between the magnetic poles 71, 71 that are end portions of the iron core 64.

73 to 76 show a conventional armature block 73. The armature block 73 includes an armature 75, a movable contact 77, a movable contact spring 76, a support spring 78, and an insulating support 79. The armature 75 is made of a soft magnetic material such as electromagnetic soft iron and has a substantially flat plate shape. Movable contact spring 7
6 is formed of a conductive metal material such as a copper alloy thin plate. The movable contact spring 76 is integrally formed with the armature 75 below the armature 75 by an insulating support 79 made of an insulating material such as synthetic resin and arranged in parallel with the armature 75. A movable contact 77 made of a noble metal tip of bulky is fixed by electric welding, and is electrically connected to a common terminal 58 via a support spring 78 described later. The support spring 78 is formed integrally with the movable contact spring 76 electrically and mechanically, and extends in a direction orthogonal to the longitudinal center of the movable contact spring 76.
It is fixed by electric welding to a common terminal joint portion 59 arranged at the center of the long side of the armature storage chamber 54 of the housing 51 and the center of the partition wall 51a, and is electrically connected to the common terminal 58. Since the electromagnetic force acts on the armature 75 by exciting the coil 69 of the electromagnet block 62, when the coil 69 is excited in the predetermined direction, the armature 75 causes the movable contact spring 76 and the armature 75 to move through the insulating support 79. Support spring 7
8 is inverted and oscillated so as to face the magnetic poles 71, 71 of the iron core 64.

The case 82 is formed of an insulating material such as synthetic resin into a substantially box shape, and is fitted onto the housing 51 in which the armature block 73 and the electromagnet block 62 are mounted.

[0007]

The conventional balanced armature type electromagnetic relay has the following problems.

When the electromagnetic relay is activated, the armature 75 of the armature block 73 and the electromagnet block 62 are
A collision occurs with the magnetic pole 71 of the armature 75, and this collision causes shock vibration in the armature 75. This state is shown in FIG.
Referring to (a), the armature 75a is magnetically attracted to one magnetic pole 71a of the electromagnet block 62, and the movable contact 77a stably contacts the fixed contact 55a (not shown). It shows the state of doing. Here, the following description will be made on the assumption that both ends of the permanent magnet 72 are magnetized to have N poles and substantially the center to have S poles. When both ends are magnetized to the S pole and the substantially center is magnetized to the N pole, the directions of the magnetic flux described below are opposite, but the operation is the same. The magnetic flux A from the permanent magnet 72 flows through the magnetic pole 71a and the armature 75a, so that the armature 75a is magnetically attracted to the magnetic pole 71a, and the armature 75 is stably held as shown in FIG. 77 (a). There is. Here, when a current is passed through the coil 69 so that the magnetic flux flows from the armature 75a toward the magnetic pole 71a, the permanent magnet 7 is provided between the armature 75a and the magnetic pole 71a.
The magnetic flux A from 2 and the magnetic flux C from the coil 69 (this magnetic flux C
Are flowing inside the iron core 64), and the magnetic attraction between the armature 75a and the magnetic pole 71a is reduced. At the same time, by passing a current through the coil 69, the magnetic flux C generated from the other magnetic pole 71b toward the armature 75b and the permanent magnet 72 to the magnetic pole 71b.
When the magnetic attraction force between the armature 75b and the magnetic pole 71b generated by the magnetic flux B passing through the armature 75b increases, and exceeds the magnetic attraction force between the armature 75a and the magnetic pole 71a, the armature 75b moves to the other side. It is magnetically attracted to the magnetic pole 71b, and the armature 75 is inverted (see FIG. 77 (b)). (B) shows the moment when the armature 75 is reversed by the excitation of the coil 69 of the electromagnet block 62 and the armature 75b collides with the other magnetic pole 71b. At this time, the kinetic energy of the inverted armature 75 cannot be absorbed between the armature 75b and the magnetic pole 71b, so that the armature 7
Impact vibration occurs in No. 5. The following (c) and (d) show the occurrence of this impact vibration. (C) shows a state in which the armature 75a is maximally separated from the magnetic pole 71a due to impact vibration caused by a collision between the armature 75b and the magnetic pole 71b. (D) shows the state after the armature 75a has approached the magnetic pole 71a, which is the next situation of (c). Here, the alternate long and short dash lines shown in (c) and (d) indicate the stable position of the armature 75 at rest, and the impact vibration continues to vibrate while gradually decreasing the vibration amplitude of the armature 75, and finally For armature 7
5 stably stands at the position indicated by the alternate long and short dash line. As described above, in the conventional electromagnetic relay, when the armature 75 reverses and swings during operation of the electromagnetic relay, due to the collision between the armature 75 and the magnetic pole 71, transient shock vibration occurs in the armature 75, The following problems have occurred.

(1) The movable contact spring 76 is an insulating support 7.
9 is integrated with the armature 75 by the coil 9 of the electromagnet block 62 during operation, and the support springs 78, 78 extending in a direction orthogonal to the longitudinal center of the movable contact spring 76 are centered around the armature 7
The magnet 5 oscillates in contact with the magnetic poles 71, 71 of the electromagnet block 62 alternately in a freely reversible manner. However, when the armature 75 collides with the magnetic pole 71, the above-mentioned excessive shock vibration is generated for a while until it stabilizes, and this shock vibration is propagated to the movable contact spring 76 and the support spring 78. Figure 7
8 is a cross-sectional view of the periphery of the support spring 78 shown in FIG. 77 as viewed from the side, and FIGS. 8 (a), (b), (c) and (d).
Correspond to each other. As you can see from this figure,
(A) shows a stable state of the support spring 78, and the stable state is maintained in a state where the end portion of the support spring 78 is fixed to the upper portion of the common terminal joint portion 59 of the housing 51.
In (c), since the support spring 78 is displaced downward and the armature 75 approaches the fixed contact 55 side, the amount of deflection of the movable contact spring 76 increases as compared with the stable state. In (d), on the contrary, the support spring 78 is displaced upward,
Since the armature 75 is separated from the fixed contact 55 side, the amount of deflection of the movable contact spring 76 is reduced as compared with the stable state. As a result, the contact pressure between the fixed contact 55 and the movable contact 77 changes, and in particular (d), the contact pressure between the fixed contact 55 and the movable contact 77 decreases, so that the contact between the contacts is reduced. When the resistance increases and, in the extreme case, the fixed contact 55 and the movable contact 77 are not sufficiently contacted with each other and are separated from each other. Thus, during the operation of the electromagnetic relay, while the armature 75 is undergoing shock vibration, the fixed contact 5
5 causes a so-called bounce phenomenon due to the intermittent opening and closing of the movable contact 77 and the movable contact 77. Further, when the amount of deflection of the movable contact spring 76 is decreasing, the contact pressure is decreasing, so that it is easily affected by disturbance. Therefore, while the bounce phenomenon is occurring,
Since a malfunction occurs in the circuit, it is necessary to take some measures on the circuit in order to prevent this. Further, during this period, there is a problem that it cannot be used for a device that requires high-speed switching because it does not fully function as a switching circuit.

(2) Under current-voltage conditions in which arc discharge occurs, the noble metal on the contact surface evaporates and transfers due to the discharge that occurs when the contact is opened and closed, and when the contact is opened and closed a large number of times, the contact surface is deformed and has a predetermined characteristic. Can no longer hold. If the bounce phenomenon occurs when the contacts are opened or closed, discharge occurs during the bounce phenomenon, which shortens the life of the contacts.

(3) Originally, the armature 75 oscillates about the support spring 78 so as to face the magnetic poles 71, 71 alternately and reversibly. Therefore, the support spring 78 undergoes torsional deformation. However, when impact vibration occurs in the armature 75 described above, the support spring 78 is deformed by bending and pulling in addition to the deformation of torsion as shown in FIG. The shock vibration of this armature 75 is
Since the support spring 78 is generated when it is subjected to the maximum torsional deformation, the maximum stress applied to the inside of the support spring 78 is larger than that in the case where only the torsional deformation is performed. There was a problem that the life was shortened. In addition, since shock vibration is generated every time the electric contacts are switched, deformation is caused by bending and pulling a large number of times for one contact switching operation, and the number of repetitions of deformation acting on the support spring 78 is increased. Therefore, there is a problem that the durability life of the support spring 78 is shortened.

(4) In order to adjust the magnetic attraction between the armature 75 and the magnetic pole 71, the armature 75 and the magnetic pole 7
1, a magnetic residual gap is formed between the magnetic residual gap and the nonmagnetic plating layer or the nonmagnetic metal plate. However, due to the shock vibration of the armature 75, the nonmagnetic plating layer and the nonmagnetic plating layer constituting the magnetic residual gap are not formed. Wear occurs on the magnetic metal plate.
When the contact surface between the armature 75 and the magnetic pole 71 is observed while the shock vibration is generated in the armature 75, the armature 75 between the armature 75 and the magnetic pole 71 is observed.
Relative motion with extremely small amplitude is performed in response to the impact vibration of No. 1, fine movement wear occurs at the contact surface between the armature 75 and the magnetic pole 71, and fine abrasion powder is produced. Since the abrasion powder adheres to the surfaces of the movable contact 77 and the fixed contact 55, there is a problem that contact failure of the contact is caused and the contact life is shortened. Also, due to wear, the armature 7
When the magnetic residual gap formed between the magnetic pole 5 and the magnetic pole 71 becomes small, the operating characteristics change due to the increase in the operating voltage and the decrease in the return voltage, which shortens the life of the electromagnetic relay. .

In the housing 51, fixed contact terminals 56, common terminals 58, coil terminals 60 and other terminals and fixed contacts 5 are provided.
5 is provided, and each terminal such as a fixed contact terminal 56, a common terminal 58, and a coil terminal 60, which is formed by pressing a conductive thin plate such as a copper alloy into a desired shape, has one end on the lower surface of the housing 51. Insert molding is performed with a molding material such as a synthetic resin so as to project further. The fixed contact 55 is formed on the fixed contact joint portion 57, and the movable contact 77 is formed on the end portion of the movable contact spring 76 by electrically welding a noble metal tip of the bulky, respectively. Is formed by electrically welding a bulky noble metal tip to the fixed contact joint portion 57, so that the contact height varies due to the complicated terminal shape and insert molding. If it occurs easily and the contact height varies, the fixed contact 5
5, the contact pressure between the movable contact 77 and the movable contact 77 varies from contact to contact, and the contact characteristics vary, and the fixed contact 5
Since the distance between the movable contact 77 and the movable contact 5 also varies, the condition of occurrence of the bounce phenomenon described above varies from contact to contact, which makes it difficult to adjust the performance of the electromagnetic relay. Further, there is a problem in that the contact height varies and the contact pressure varies depending on the state of electric welding of the bulky precious metal tip. If the welding state is insufficient, the thermal resistance between the fixed contact 55 and the fixed contact joint portion 57 and between the movable contact 77 and the movable contact spring 76 becomes large,
In particular, when used under the condition that arc discharge is generated, there is a problem that the contact wears sharply and the contact life is shortened. Further, when trying to obtain a sufficient welded state, there is a problem that the temperature of the welded portion rises during welding, the movable contact spring 76 and the fixed contact joint portion 57 are deformed, and the contact height varies.

In view of the above-mentioned conventional drawbacks, the present invention has been made.
These defects are eliminated, the occurrence of bounce phenomenon can be prevented, the durability life of the supporting spring in repeated movements can be improved, the microscopic wear of the contact surface between the armature and the magnetic pole can be reduced, and the change in the magnetic residual gap can be prevented. It is possible to prevent changes in the operating characteristics and contact failure due to the adhesion of wear powder to the contacts, and obtain a uniform contact height and stable contact pressure.
It is an object of the present invention to provide a high-performance, long-life electromagnetic relay that has a long contact life even under discharge conditions.

[0015]

To achieve the above object, the present invention provides an electromagnet block including an iron core around which a coil is wound and a permanent magnet, an armature, a movable contact spring, an insulating support and a movable contact. It consists of a support spring that extends in a direction orthogonal to the longitudinal center of the spring and is fixed to the housing.The armature and the movable contact spring are integrated by an insulating support, and the support spring is centered to face the electromagnet block. It is equipped with an armature block that swings freely between the magnetic poles of
In an electromagnetic relay consisting of a housing to which an armature block and an electromagnet block are mounted, and a case to which the housing is fitted, provide a stopper that regulates the upward or downward displacement of the support spring that occurs when the armature swings. Constitutes an electromagnetic relay. Also, an electromagnet block including an iron core around which a coil is wound and a permanent magnet, a support extending in a direction orthogonal to the longitudinal center of the armature, a movable contact spring, an insulating support and a movable contact spring and fixed to the housing. In an electromagnetic relay consisting of an armature block consisting of a spring, a housing equipped with a common terminal, a fixed contact terminal, and a coil terminal, on which the electromagnet block and the armature block are mounted, and a case fitted onto the housing, the armature and the movable contact spring are An electromagnetic relay is provided by providing a one-way connecting means for swinging the armature and the movable contact spring, facing the magnetic poles of the electromagnet block around the support spring in a reversible manner, in a state where the armature and the movable contact spring are dividedly formed through an insulating support. Are configured. Further, in the electromagnetic relay provided with the one-way connecting means, the electromagnetic relay is configured by providing a contact pressure stabilizing mechanism including a magnetic flux concentrator or an anchoring device for properly adjusting the contact pressure between the movable contact and the fixed contact. There is. Further, an electromagnetic relay is constructed by providing a displacement stopper that restricts the upward or downward displacement of the support spring due to the displacement of the armature caused by the magnetic attraction of the magnetic flux concentrator. Further, an electromagnetic relay is constructed by interposing a plastic sheet between the armature and the magnetic pole. In addition, the housing has an insulating substrate made of ceramic or glass-coated metal, a fixed contact made of a fired body of thick film paste formed on the upper surface of the insulating substrate, and a fixing portion for fixing the armature block and the electromagnet block. An electromagnetic relay is configured by providing a coil terminal, a common terminal, and a fixed contact terminal on the lower surface of the insulating substrate. Further, an electromagnetic relay is formed by forming movable contacts on both ends of the movable contact spring with a fired body of thick film paste.

As described above, the electromagnetic relay provided with the movable contact spring integrally formed with the armature and the insulating support has the attraction of the permanent magnet acting on the magnetic pole of the electromagnet block on the side in contact with the armature. By weakening the force and exciting the coil so as to increase the attractive force of the permanent magnet acting on the magnetic pole on the other side, the attractive force is applied to the substantially end portion of the armature on the side not in contact with the magnetic pole, With the support spring as the center, the armature is reversed and oscillated when energized to switch the contacts. At this time, collision occurs between the armature and the magnetic pole, and shock vibration occurs due to the fact that the swinging energy of the armature cannot be absorbed. This shock vibration is transmitted to the movable contact spring and the support spring,
In addition to torsional deformation, the support spring is vertically displaced. However, the vertical displacement of the support spring due to impact vibration is restricted by the stopper, so the vertical deformation of the support spring is reduced, the deflection of the movable contact spring becomes constant, and the impact vibration Occurrence time is shortened. Further, even when the armature and the movable contact spring are divided and separated via the insulating support, the armature is configured to oscillate in the reverse direction, so that impact vibration occurs due to collision between the armature and the magnetic pole. However, the impact vibration of the armature is not transmitted to the movable contact spring and the support spring. Therefore, the support spring is not displaced in the vertical direction, and the amount of deflection of the movable contact spring is constant. Further, since the plastic sheet is interposed between the armature and the magnetic pole, the shock vibration due to the collision between the armature and the magnetic pole is absorbed by the plastic sheet, and the occurrence time of the shock vibration of the armature is shortened, and at the same time, between the armature and the magnetic pole. No abrasion powder is generated due to fine movement wear. In addition, the movable contact is formed of a thick-film paste fired body, and the housing is a fixed contact made of an insulating substrate made of ceramic or glass-coated metal and a thick-film paste fired body formed on the insulating substrate. Since it is composed of and, the height of the fixed contacts is stable and does not vary, especially in the case of an electromagnetic relay with multiple contacts, the contact pressure between each fixed contact and the movable contact is constant. Therefore, the distance between each fixed contact and the movable contact becomes constant.

[0017]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In these embodiments, the same members as those in the conventional example are designated by the same reference numerals, and duplicate description of these reference numerals will be omitted.

The first embodiment of the present invention is shown in FIG.
0 to 71 will be described with reference to FIGS. 1 to 3. Reference numeral 51 denotes a housing, which has a side wall 52 and is substantially box-shaped with an upper opening, and is partitioned into a coil storage chamber 53 and an armature storage chamber 54 by a partition wall 51a, and is also provided with stoppers 24a and 24b described later. . The housing 51 has a fixed contact terminal 56 and a common terminal 5 formed by pressing a conductive thin plate of copper alloy or the like into a desired shape.
8, one end of each terminal such as the coil terminal 60 is the housing 51
It is arranged so as to project downward from the bottom surface, and these terminal groups are insert-molded with synthetic resin or the like.
One end of the fixed contact terminal 56 projects from the lower surface of the housing 51, and the other end is arranged at each of the four corners of the armature storage chamber 54. The fixed contact 55 made of a bulky noble metal tip is fixed to the upper portion by electric welding. It is fixed so as to be electrically connected to the contact terminal 56. One end of the common terminal 58 projects from the lower surface of the housing 51, and the other end of the common terminal 58 and the longitudinal center of the side wall of the armature storage chamber 54 and the partition wall 51.
The common terminal joint portion 59 is formed at the center of a.
A support spring 78 of an armature block 73, which will be described later, is fixed to the common terminal joint portion 59 by electric welding.
Stoppers 24a, 2 for restricting upward displacement of the support spring
4a is made of an insulating material such as synthetic resin and has a support spring 7a.
8 and the partition wall 5 at the center of the long side of the side wall of the armature storage chamber 54 so as to be in contact with or slightly separated from the lower part of 8.
It is provided so as to project from the central portion of 1a. Further, the stoppers 24b, 24 for restricting the downward displacement of the support springs
b is made of an insulating material such as synthetic resin, and protrudes from the central part of the long side of the armature storage chamber 54 and the central part of the partition wall 51a so as to be in contact with the upper part of the support spring or to be slightly separated. (Fig. 3). As described above, the coil terminal 60 has the housing 51 at one end.
Of the coil terminal bonding portion 6 and the other end thereof is provided so as to project from the recess of the side wall of the coil housing chamber 53.
Form one. A coil lead terminal 68 of an electromagnet block 62, which will be described later, is fixed to the coil terminal joint portion 61 by electric welding.

The electromagnet block 62 is composed of an electromagnet portion 63 and a permanent magnet 72. The electromagnet section 63 is
Further, it is composed of an iron core 64, a coil 69, and a coil lead-out terminal 68. The iron core 64 is formed of a magnetic material such as electromagnetic soft iron into a substantially U-shape. A spool 66 made of a molding material such as synthetic resin is provided at an intermediate portion thereof, and a molding material such as synthetic resin is provided at an end portion of the spool 66. Each of the collars 67 is provided, and both ends of the iron core 64 project laterally from the collar 67 to form the magnetic pole 71. The coil lead-out terminal 68 (FIG. 2) is formed of a conductive metal material in a substantially U-shape and is provided so as to project from the collar 67, and one end thereof is fixed to the coil terminal joint portion 61 of the housing 51 by electric welding. , And is electrically connected to the coil terminal 60. The coil 69 is wound around a spool 66 provided in an intermediate portion of the iron core 64, and a coil lead wire 70 is fixed to the other end of the coil lead terminal 68 by soldering, and the coil 69 is wound via the coil lead terminal 68. It is electrically connected to the terminal 60. The permanent magnet 72 has a substantially flat plate shape and is magnetized so that both ends have the same pole and substantially the center has different poles.
It is provided so as to be interposed between the magnetic poles 71 and 71 which are the end portions of No. 4.

The armature block 73 includes an armature 75, a movable contact 77, a movable contact spring 76 and a support spring 7.
8 and an insulating support 79. The armature 75 is made of a soft magnetic material such as electromagnetic soft iron and has a substantially flat plate shape. The movable contact spring 76 is formed of a conductive metal material such as a copper alloy thin plate. The movable contact spring 76 is integrally attached to the armature 75 below the armature 75 by an insulating support 79 made of an insulating material such as synthetic resin and arranged in parallel with the armature 75. A movable contact 77 made of a bulky noble metal tip is fixed by electric welding, and is electrically connected to a common terminal 58 via a support spring 78 described later. The support spring 78 is formed electrically and mechanically integrally with the movable contact spring 76, extends in a direction orthogonal to the longitudinal center of the movable contact spring 76, and extends between the center of the long side of the armature storage chamber 54 of the housing 51 and the partition wall 51 a. It is fixed by electric welding to a common terminal joint portion 59 arranged in the center and is electrically connected to the common terminal 58.

Further, a case 82 (not shown) is externally fitted to the housing 51 in which the armature block 73 and the electromagnet block 62 are mounted.

In the thus constructed electromagnetic relay according to the first embodiment of the present invention, when the coil 69 of the electromagnet block 62 is excited, an electromagnetic force is generated in the magnetic pole 71 and an attractive force acts on the armature 75. Therefore, the armature 75 faces the magnetic poles 71, 71 of the iron core and swings reversibly around the support spring 78. At this time, the armature 7
5 and the magnetic pole 71 collide with each other, shock vibration due to a transient phenomenon occurs in the armature 75, and the support spring 78 tends to be displaced in the vertical direction.
By contacting with 8, the downward displacement of the support spring 78 is restricted, a stable contact pressure can be obtained, the occurrence of the bounce phenomenon can be prevented, and the deformation of the support spring 78 other than torsion can be prevented. Is suppressed, the durability life of the support spring 78 can be improved. Further, since the stopper 24b and the support spring 78 come into contact with each other,
Since the upward displacement of the support spring 78 is regulated, a stable contact pressure can be obtained, the bounce phenomenon can be prevented from occurring, and the deformation of the support spring 78 other than torsion is suppressed. The durable life of 78 can be improved. Also, since the bounce phenomenon does not occur, even under the condition of current and voltage that arc discharge occurs,
The contact life is extended. Furthermore, the energy of shock vibration is
Since they are respectively absorbed by the stoppers 24a and 24b, it is possible to shorten the occurrence time of impact vibration. here,
Although the stoppers 24a and 24b are provided so as to project from the central portion of the long side of the side wall of the armature storage chamber 54 and the central portion of the partition wall 51a, respectively, only one of them may be provided. The same effect can be obtained by providing the housing 51 and the permanent magnet 72, the lower part and the upper part of the support spring 78, the case 82, etc., which are located in the lower part and the upper part of the body 79, the lower part and the upper part of the insulating support 79, respectively. be able to.

FIG. 4 shows a second embodiment of the present invention in which stoppers 24c and 24d are provided on the bottom surface of the housing 51 and the lower surface of the permanent magnet 72 with an insulating support 79 interposed therebetween. In the second embodiment of the present invention, the stopper 2
The vertical displacement of the armature block 73 is suppressed by 4c and 24d, so that the vertical displacement of the support spring 78 is restricted.

FIG. 5 shows the third embodiment of the present invention in which the stoppers 24e and 24f are provided on the lower surface and the upper surface of the insulating support 79, respectively. It has the same effect as the form. In addition, these stoppers 2
It goes without saying that 4e and 24f may be formed integrally with the insulating support 79.

In the fourth embodiment, a plastic sheet is interposed between the armature and the magnetic pole. (Not shown)

A magnetic residual gap is formed between the armature 75 and the magnetic pole 71 by interposing a plastic sheet such as polyethylene terephthalate, polyethylene naphthalate, polyimide, polyetherimide, polyphenylene sulfide, aramid or liquid crystal polymer. There is. In this embodiment, a 25 μm thick polyimide film is used, but the magnetic residual gap may be formed by combining with a conventional non-magnetic plating layer or non-magnetic metal plate.

In the electromagnetic relay constructed as described above, the impact due to the collision between the armature 75 and the magnetic pole 71, which occurs when the armature 75 is reversed and oscillated, is absorbed by the plastic sheet which is an elastic body. The impact vibration of the armature 75 can be reduced, the impact noise can be reduced, and the impact vibration generation time can be shortened, so that the effect of preventing the bounce phenomenon can be enhanced as compared with the first embodiment of the present invention. Support spring 7
Since the displacement other than the torsion generated in 8 can be further reduced, the deformation of the support spring 78 other than the torsion can be suppressed, and the durability life of the support spring 78 can be further improved. Also,
In addition to absorbing shock vibration between the armature 75 and the magnetic pole 71, like a conventional electromagnetic relay,
Since there is no generation of wear powder due to fine movement wear between the armature 75 and the magnetic pole 71, contact failure of the contacts due to wear powder can be prevented. Furthermore, since the magnetic residual gap does not change due to slight wear, it is possible to prevent changes in operating characteristics due to increase in operating voltage and decrease in return voltage.
In addition, by forming the magnetic residual gap with a plastic sheet, the magnetic residual gap can be easily adjusted and variations can be reduced. Here, a crystalline polymer is preferable as a material for the plastic sheet because the plastic sheet and the armature are subject to impact, and a minute relative movement is performed on the contact surface between the plastic sheet and the armature. Also,
When the electromagnetic relay is operated, heat is generated from the coil, and therefore it is desirable that the coil has heat resistance of 120 ° C. or higher if possible.
Polyimide is particularly preferable as a material satisfying these conditions.

Next, FIGS. 6 to 8 show a fifth embodiment of the present invention, in which the movable contact spring 76 and the support spring 78, the armature 19,
The magnetic pole 71 and the permanent magnet 72 are layered in this order, and the one-way connecting means 32a is constituted by the engaging portion provided on the insulating support 21a and the engaged portion provided on the armature 19, and the movable contact spring 76 and the armature 19 are formed. Is divided and operates independently through the insulating support 21a. 9 to 12 show an armature block 18a according to a fifth embodiment of the present invention, in which the movable contact spring 76 has a substantially U-shaped cross section made of an insulating material such as synthetic resin at the center thereof. The insulative support 21a is the movable contact spring 7
6 and insert molded. Insulating support 2
Engagement pieces 33 are formed on the upper surfaces of the side walls 21c and 21d which are the free ends of 1a. A support spring 78 electrically and mechanically integrated with the movable contact spring 76 is formed so as to extend in a direction orthogonal to the longitudinal center of the movable contact spring 76, and the long side of the armature storage chamber 54 of the housing 51. It is fixed by electric welding to a common terminal joint portion 59 arranged in the center and the center of the partition wall 51a. An armature 19 formed of a soft magnetic material such as electromagnetic soft iron in a substantially flat plate shape is disposed above the movable contact spring 76, and the armature 19 has a sidewall 2 formed on the insulating support 21a.
A hole 37 into which 1c and 21d are inserted is formed, and this hole 3
7, the side walls 21c and 21d of the insulating support 21a and the engaging piece 33 are inserted and engaged, and the movable contact spring 76 and the armature 19 are configured separately. Such a structure will be referred to as a one-way connecting means 32a here. Above the armature 19, the magnetic pole 71 of the electromagnet block 62 is provided.
And a permanent magnet 72 is arranged. One-way connection means 3
The side wall 21c and 21d formed on the insulating support 21a having a U-shaped cross section penetrates through the hole 37 formed in the armature 19 as described above, and the engaging portion provided at the end of the side wall 21c and 21d. The armature 1 is the engaging piece 33 which is
9 is engaged with a hole 37 which is the engaged portion of the armature 9. When the engaging piece 33 and the hole 37 of the engaged portion are engaged, one end of the armature 19 is moved by the attractive force of the permanent magnet 72. It is attracted and held by the magnetic pole 71.

In the electromagnetic relay according to the fifth embodiment of the present invention having the above-described structure, by exciting the coil 69 of the electromagnet block 62, an electromagnetic force is generated in the magnetic pole 71 and is separated from the magnetic pole 71. A suction force acts on the end of the armature 19 on the side, and the engaging piece 33 of the insulative support 21a engaged with the hole 37 of the engaged portion of the armature 19 on the side separated from the magnetic pole 71 is lifted to insulate. Sexual support 21a
And a movable contact spring 76 integrated with the insulating support 21a
It is possible to reversely swing between the magnetic poles 71, 71 about the support spring 78 fixed to the housing 51. In the armature 19, since the engaging piece 33 of the engaging portion and the hole 37 of the engaged portion which constitute the one-way connecting means 32a are engaged with each other and are held by the attractive force of the permanent magnet 72, the movable contact spring 76 is provided. At the same time, the magnetic poles 71 and 71 are oscillated in an inverted manner around the support spring 78.

The operating state of the armature 19 in the fifth embodiment of the present invention will be described with reference to FIG. 13 while referring to the operating state of the conventional armature 75 (FIG. 77). (A) shows a state in which the armature 19a is magnetically attracted to one magnetic pole 71a of the electromagnet block 62 and the movable contact 77a is in stable contact with the fixed contact 55a (not shown). Here, when the magnetic attraction between the armature 19a and the magnetic pole 71a is reduced and the magnetic attraction between the armature 19b and the magnetic pole 71b is increased, when the coil 69 of the electromagnet block 62 is excited, the armature is excited. 19b and magnetic pole 71b
The magnetic attraction between the armature 19a and the magnetic pole 7
When the magnetic attraction force between the armature 19a and the magnet 1a is exceeded, the armature 19b is magnetically attracted to the other magnetic pole 71b, and the armature 19 is inverted (see FIG. 13B).
In (b), the armature 19 is inverted by the excitation of the coil 69 of the electromagnet block 62, and the armature 19 b
Shows the moment of collision with the other magnetic pole 71b. At this time, since the kinetic energy that has reversed the armature 19 cannot be absorbed between the armature 19b and the magnetic pole 75b, impact vibration occurs in the armature 19. The following (c) and (d) show the occurrence of this impact vibration. (C) shows the armature 19b and the magnetic pole 7.
Due to the shock vibration with 1b, the armature 19a moves to the magnetic pole 7
It shows a state in which it deviates to the maximum from 1a. On the other hand, the armature 19 is formed with a hole 37 into which the side walls 21c and 21d formed in the insulating support 21a are inserted, and the side walls 21c and 21d of the insulating support 21a pass through the hole 37 to form an insulating support. The engaging piece 33, which is an engaging portion formed on the upper surfaces of the side walls 21c and 21d of the body 21a, is used for the armature 1.
Since the one-way connecting means 32a is configured by holding the armature 19 by the attracting force of the permanent magnet 72, the engaged portion of the armature 19 is fixed to the engaged portion of the insulating support 21a. Unless the engaging piece 33 is lifted, the movement of the armature 19 is not transmitted to the movable contact spring 76. Therefore, in this state, since the impact vibration of the armature 19 is not transmitted to the movable contact spring 76 and the like, unlike the conventional armature 75 (see FIG. 77 (c)), the support spring 78 is displaced downward. Therefore, the movable contact 77a can stably contact the fixed contact 55a (not shown). (D) is
In the next situation of (c), the armature 19a has the magnetic pole 7.
It shows a state approaching 1a. In this state, the armature 19a (see FIG. 13 (c)) that has deviated to the maximum from the magnetic pole 71a due to impact vibration approaches the magnetic pole 71a due to its reaction, but since the moment of inertia of only the armature 19 is present, its movement The energy is small and the support spring 78 is hardly displaced upward. In this way, the support spring 78 is not displaced downward, and only slightly displaced upward, so that the amount of deformation of the support spring 78 other than torsion can be reduced, and bounce can be prevented. In addition to being able to reduce the number, it is possible to improve the durable life of the support spring 78. The same effect can be obtained by forming the engaging portion formed on the insulating support 21a and the engaged portion formed on the armature 19 in reverse. In addition, as described in the fourth embodiment of the present invention, by interposing a plastic sheet between the armature and the magnetic pole,
Since the shock vibration of the armature 19 can be absorbed, the occurrence of the bounce phenomenon can be further reduced,
The durable life of the support spring 78 can be further improved. FIG. 14 is a contact operation state observation view observing the occurrence state of the bounce phenomenon. In the figure, is a state where the coil 69 is energized, is a state where the movable contact 77b is in contact with the fixed contact 55b, is a state where both the movable contacts 77a and 77b are not in contact with the fixed contacts 55a and 55b, is a movable contact 77a shows a state in which the fixed contact 55a is in contact with the fixed contact 55a. It should be noted that, and includes the non-contact state and the bounce phenomenon occurrence state during the contact switching operation.
As is clear from this figure, in the fifth embodiment of the present invention, the occurrence time of the bounce phenomenon is very short, and a stable and stable contact switching operation is performed.

FIGS. 15 to 17 show a sixth embodiment of the present invention, in which the movable contact spring 76 and the support spring 78, the magnetic pole 71, the permanent magnet 17, and the armature 20 are arranged in this order from the side closer to the bottom of the housing 51. The side portions 21 of the insulative support 21b are formed by the engaging portions provided at the ends of the insulative support 21b and the engaged portions formed in the armature 20 in layers.
e and 21f penetrate the holes 37b and 37b of the permanent magnet 17 to form the one-way connecting means 32b, divide the movable contact spring 76 and the armature 20 and operate independently.

18 to 21 show an armature block 18b according to a sixth embodiment of the present invention.
An insulating support 21b having a U-shaped cross section made of an insulating material such as a synthetic resin is insert-molded together with the movable contact spring 76 at the center of the movable contact spring 76. Side wall 21 that is the free end of support 21b
A columnar convex portion 36 is formed on the upper surfaces of the e and 21f. A support spring 78 electrically and mechanically integrated with the movable contact spring 76 is formed so as to extend in a direction orthogonal to the longitudinal center of the movable contact spring 76, and the long side of the armature storage chamber 54 of the housing 51. It is fixed by electric welding to a common terminal joint portion 59 arranged in the center and the center of the partition wall 51a. The magnetic pole 71 of the electromagnet block 15 and the permanent magnet 17 are arranged above the movable contact spring 76, and the permanent magnet 17 has protrusions formed on the upper surfaces of the side walls 21e and 21f of the U-shaped insulating support 21b. A hole 37b into which the portion 36 is inserted is formed. An armature 20 formed of a soft magnetic material such as electromagnetic soft iron in a substantially flat plate shape is arranged above the magnetic pole 71 and the permanent magnet 17, and the side wall 21 of the insulating support 21b is provided on the lower surface of the armature 20.
A concave portion 35 that engages with the convex portion 36 formed on the upper surfaces of the e and 21f is formed. The one-way connecting means 32b is
The protrusions 36 are formed on the upper surfaces of the side walls 21e and 21f of the insulating support 21b, and the recesses 35 are formed on the armature 20.
The armature 20 is held by the attraction force of the permanent magnet 17 in a state where the 6 and the recess 35 are engaged with each other.

In the electromagnetic relay according to the sixth embodiment of the present invention having such a configuration, by exciting the coil 69 of the electromagnet block 15, an electromagnetic force is generated in the magnetic pole 71 and is separated from the magnetic pole 71. The suction force acts on the end of the armature 20 on the side, and the recess 35 of the engaged portion formed on the armature 20 on the side away from the magnetic pole 71 is insulative support 21b engaged with the recess 35. By pressing the convex portion 36 of the engaging portion, the insulating support 21b and the movable contact spring 76 integrated with the insulating support 21b are attached to the housing 5
The magnetic pole 7 is centered around the support spring 78 fixed to
1, 71 can be reversed and rocked. Since the engaging portion convex portion 36 and the engaged portion concave portion 35 forming the one-way connecting means 32b are engaged with each other and are held by the attractive force of the permanent magnet 17, the armature 20 and the movable contact spring 7 are held.
6, the magnetic poles 71, 71 centering on the support spring 78
In contrast, as described above, the swing is reversed.

The operating condition of the armature 20 according to the sixth embodiment of the present invention will be described with reference to FIG. 22 while referring to the operating condition of the conventional armature 75 (FIG. 77). (A) shows that the armature 20a is magnetically attracted to one magnetic pole 71a of the electromagnet block 15,
The movable contact 77a is in stable contact with the fixed contact 55a (not shown). Here, when the coil 69 of the electromagnet block 15 is excited in a direction in which the magnetic attraction force between the armature 20a and the magnetic pole 71a is reduced and the magnetic attraction force between the armature 20b and the magnetic pole 71b is increased, the armature is excited. The magnetic attractive force between 20b and the magnetic pole 71b causes the armature 20a and the magnetic pole 71b.
When the magnetic attraction force between the armature 20a and a is exceeded, the armature 20b is magnetically attracted to the other magnetic pole 71b, and the armature 20 is inverted (see FIG. 22B). (B)
Indicates the moment when the armature 20 is reversed by the excitation of the coil 69 of the electromagnet block 15 and the armature 20b collides with the other magnetic pole 71b. At this time, since the kinetic energy that has reversed the armature 20 cannot be absorbed between the armature 20b and the magnetic pole 75b, impact vibration occurs in the armature 20. The following (c) and (d) show the occurrence of this impact vibration. (C) shows a state in which the armature 20a is maximally separated from the magnetic pole 71a due to the impact vibration of the armature 20b and the magnetic pole 71b. On the other hand, the armature 20 is held by the attraction force of the permanent magnet 17 in a state where the protrusion 36 of the engaging portion formed on the insulating support 21b and the recess 35 of the engaged portion formed on the armature 20 are engaged with each other. By doing so, the one-way connecting means 32b is configured, so that the concave portion 35 that is the engaged portion of the armature 20 is formed.
However, the operation of the armature 20 is not transmitted to the movable contact spring 76 unless the engaging portion 36 of the insulating support 21b is pressed. Therefore, in this state, the armature 20
Since the shock vibration of No. is not transmitted to the movable contact spring 76 and the like, unlike the conventional armature 75 (see FIG. 77 (c)), the support spring 78 is not displaced upward, and the movable contact 77a is fixed. The contact 55a (not shown) can be stably contacted. (D) shows the state following the state of (c), in which the armature 20a is close to the magnetic pole 71a. In this state, the armature 20 that is separated from the magnetic pole 71a by the shock vibration is the maximum.
a (see FIG. 22 (c)), the reaction causes the magnetic pole 71 a.
However, the kinetic energy of the armature 20 is small and the support spring 78 is hardly displaced downward. In this way, the support spring 78 is not displaced upward, and is also slightly displaced downward, so that the support spring 7 is not displaced.
The amount of deformation other than torsion of 8 can be reduced, the occurrence of the bounce phenomenon can be reduced, and the durable life of the support spring 78 can be improved. The same effect can be obtained by forming the convex portion 36 formed on the upper surfaces of the side walls 21e and 21f of the insulating support 21b and the concave portion 35 formed on the armature 20 in reverse. Further, in the sixth embodiment of the present invention, the convex portion 3
Although 6 has a cylindrical shape, it goes without saying that the shape is not limited to such a shape. Further, as described in the fourth embodiment of the present invention, by interposing the plastic sheet between the armature 20 and the magnetic pole 71, it is possible to absorb the shock vibration of the armature 20, so that the bounce phenomenon The generation can be further reduced, and the durable life of the support spring 78 can be further improved.

25 to 29 show a seventh embodiment of the present invention. Here, in the fifth embodiment of the present invention, in the case where the spring force of the movable contact spring 76 is strengthened in order to increase the contact pressure between the movable contact 77 and the fixed contact 55, FIG. It is conceivable that the insulating support 21a is pushed upward by the repulsive force of the movable contact spring 76, and the engagement piece 33a constituting the one-way coupling means 32a is disengaged, as shown in FIG. (At this time, the armature 19 is in a state of being attracted to the magnetic pole 71b with the engaging piece 33b as a fulcrum.) Even in such a situation, the one configured to obtain a stable contact pressure is the first aspect of the present invention. It is a seventh embodiment.

A coil 69 is wound and magnetic poles 7 are provided at both ends.
An electromagnet block 62 composed of an iron core 64 provided with 1, 71 and a permanent magnet 72, a movable contact spring 76 in which a movable contact 77 made of a precious metal chip of a bulky is fixed to both ends of the armature 19 by electric welding, and an insulating support. Body 21a
And an armature block 18a consisting of a support spring 78 extending in a direction orthogonal to the center of the movable contact spring 76 and fixed to the housing 51, and a fixed contact 55 composed of a common terminal 58 and a bulky precious metal tip are electrically welded. Fixed contact terminal 56 and coil terminal 60 that are electrically connected
Equipped with an electromagnet block 62 and an armature block 1
The housing 51 includes a housing 51 for mounting the housing 8a and a case (not shown) fitted on the housing 51.
From the side closer to the bottom of the movable contact spring 76 and the support spring 7
8, the armature 19, the magnetic pole 71, and the permanent magnet 72 are layered in this order, and the engaging portion provided on the insulating support 21a and the engaged portion provided on the armature 19 constitute the one-way connecting means 32a, and the movable contact spring. 76 and Armature 19
And are divided so as to operate independently via the insulating support 21a. FIG. 28 is a cross-sectional view of a main part showing the first contact pressure stabilizing mechanism. At the center of the movable contact spring 76, an insulative support 21a made of an insulating material such as synthetic resin and having a substantially U-shaped cross section is insert-molded together with the movable contact spring 76. Engagement pieces 33 are formed on the upper surfaces of the side walls 21c and 21d of the insulating support 21a. An armature 19 formed of a soft magnetic material such as electromagnetic soft iron in a substantially flat plate shape is arranged above the movable contact spring 76. The armature 19 has an insulating support 21a.
A hole 37 is formed in which the side walls 21c and 21d formed on the side wall 2c of the insulating support 21a are inserted.
The movable contact springs 76 and the armature 19 are separated from each other by inserting and engaging the engaging pieces 33 with 1c and 21d. Above the armature 19, the magnetic pole 71 of the electromagnet block 62 and the permanent magnet 72 are arranged. Permanent magnet 72
Is magnetized so that both ends thereof have the same pole and substantially the center thereof has different polarities, and are interposed between the magnetic poles 71, 71 which are the end portions of the iron core 64. As described above, the one-way connecting means 32a has a hole 37 in which the side walls 21c and 21d formed in the insulating support 21a having a U-shaped cross section are formed in the armature 19.
The engaging piece 33, which is an engaging portion provided at the ends of the side walls 21c and 21d, is engaged with a hole 37 that is an engaged portion of the armature 19. First
The contact pressure stabilizing mechanism of is arranged so as to face the permanent magnet 72.
The armature 19 is configured by projecting a magnetic flux concentrator 27a at a substantially central portion of the armature 19.

The operation of the magnetic flux concentrator 27a will be described in detail with reference to FIG. The magnetic flux concentrator 27a concentrates the magnetic flux passing through the substantially central portion of the armature 19 and the permanent magnet 72. Since the magnetic flux concentrates in a narrow range by the magnetic flux concentrator 27a, the magnetic attraction force acting between the substantially central portion of the armature 19 and the permanent magnet 72 becomes larger than that in the case where the magnetic flux concentrator 27a is not provided. (A)
The movable contacts 77a, 77b are both fixed contacts 55a, 5
5b (not shown) are not in contact with each other. In this state, there is no deflection of the movable contact spring 76, and therefore the force acting on the armature 19 is the force due to the magnetic flux passing through the substantially central portion of the armature 19 and the permanent magnet 72, the force due to the magnetic flux passing through the magnetic pole 71a and the armature 19a, and Only the force by the magnetic flux passing through the magnetic pole 71b and the armature 19b is used, and the engaging pieces 33a and 33b forming the one-way connecting means 32a and the armature 19 are engaged, and the one-way connecting means 32a is not disengaged.
(B) shows a stationary state in which the armature 19a is magnetically attracted by the magnetic pole 71a and the movable contact 77a is in contact with the fixed contact 55a. The force due to the magnetic flux passing through the armature 19 is strengthened, that is, the substantially central portion of the armature 19 is attracted to the substantially central portion of the permanent magnet 72, and the one-way coupling means 32a and 32a are firmly engaged with each other, so that the contact spring 76.
The force generated by the bending of the one-way connecting means 32
The engagement of a and 32a does not come off. Therefore, due to the bending of the movable contact spring 76 that occurs when the movable contact 77 and the fixed contact 55 come into contact with each other, the one-way connection unit 3
Since the engagement of 2a is not disengaged and the desired deflection of the movable contact spring 76 is obtained, the contact pressure between the movable contact 77 and the fixed contact 55 is further stabilized, and the contact contact resistance is further stabilized. In the seventh embodiment of the present invention, the magnetic flux concentrator 27a is integrally formed of the same material as the armature 19, but if the soft magnetic material has a high saturation magnetic flux density and a large magnetic permeability, However, the shape is not limited to this.

FIG. 30 is a cross-sectional view of an essential part showing the second contact pressure stabilizing mechanism.
9, a magnetic flux concentrator 27b is provided so as to face the magnetic flux collector 9. In the eighth embodiment of the present invention, which employs the second contact pressure stabilizing mechanism instead of the first contact pressure stabilizing mechanism, it is possible to obtain the same effect as that of the seventh embodiment of the present invention. You can In addition, in the eighth embodiment of the present invention, the magnetic flux concentrator 27b is integrally formed of the same material as the permanent magnet 72. It may be a magnetic material and is not limited to this.

FIG. 31 is a sectional view showing an essential part of the third contact pressure stabilizing mechanism, in which an elastic member, for example, a locker 30a made of rubber is interposed between the armature 19 and the insulating support 21a. is there. The operation of the ninth embodiment of the present invention, which employs the attachment device 30a that is the third contact pressure stabilizing mechanism, will be described with reference to FIG.

(A) shows a state in which the movable contacts 77a, 77b are not in contact with the fixed contacts 55a, 55b (not shown), respectively. In this state, there is no deflection of the movable contact spring 76, and therefore the force acting on the armature 19 is the force due to the magnetic flux passing through the substantially central portion of the armature 19 and the permanent magnet 72, and the magnetic pole 71a and the armature 1.
The force due to the magnetic flux passing through 9a and the force due to the magnetic flux passing through the magnetic pole 71b and the armature 19b only engage the engaging pieces 33a and 33b constituting the one-way connecting means 32a with the armature 19, and the one-way connecting means 32a It does not come off. (B) shows a stationary state in which the armature 19a is magnetically attracted to the magnetic pole 71a and the movable contact 77a contacts the fixed contact 55a.
5, the movable contact spring 76 is bent and a compressive force is applied to the anchor 30a, but the anchor 3 which is an elastic member.
Due to the restoring force of 0a, the distance between the armature 19 and the insulating support 21a is kept constant, that is, the engagement of the one-way connecting means 32a becomes strong, so that the one-way connecting means 32a does not come off. . Therefore, since the movable contact spring 76 can obtain a desired deflection, the contact pressure between the movable contact 77 and the fixed contact 55 is further stabilized and the contact contact resistance is the same as in the seventh and eighth embodiments of the present invention. Is even more stable.

FIG. 33 is a cross-sectional view of an essential part showing a fourth contact pressure stabilizing mechanism, in which an elastic member, for example, an anchoring device 30b made of a coil spring is interposed between the armature 19 and the insulating support 21a. Is. Even in the tenth embodiment of the present invention in which the fourth contact pressure stabilizing mechanism is adopted instead of the third contact pressure stabilizing mechanism, the same effect as the electromagnetic relay of the ninth embodiment of the present invention is obtained. Can be obtained. In addition, the anchor 30a which is the third contact pressure stabilizing mechanism and the anchor 30b which is the fourth contact pressure stabilizing mechanism are not limited to these shapes and materials.

34 to 37 show an eleventh embodiment of the present invention. The movable contact spring 76 and the support spring 78, the magnetic pole 71, the permanent magnet 17, and the armature 20 are layered in this order from the side closer to the bottom of the housing 51. One-way connection configured so that the movable contact spring 76 and the armature 20 are divided and operate independently by penetrating through the holes 37b, 37b of 17 and engaging with a engaged portion formed in the armature 20. When the means 32b is adopted, and in the sixth embodiment of the present invention, in order to increase the contact pressure between the movable contact 77 and the fixed contact 55, the spring force of the movable contact spring 76 is strengthened. , The movable contact spring 7 as shown in FIG.
The insulating support 21b is pushed upward by the repulsive force of 6, and the engaging recess 35a that constitutes the one-way connecting means 32b.
It is conceivable that the engagement of the engagement protrusion 36a will be disengaged.
(At this time, the armature 20 is in a state of being attracted by the magnetic pole 71b with the engaging convex portion 36b as a fulcrum.) Even in such a situation, the one configured so as to obtain a stable contact pressure is the present invention. It is an eleventh embodiment.

FIG. 37 is a cross-sectional view of an essential part showing a fifth contact pressure stabilizing mechanism adopted in the eleventh embodiment of the present invention, in which the central part of the movable contact spring 76 is made of synthetic resin or the like. An insulative support 21b having a U-shaped cross section made of an insulative material is insert-molded together with the movable contact spring 76, and the side walls 21e, 21 of the insulative support 21b having the U-shaped cross section.
A cylindrical convex portion 36 is formed on the upper surface of f. Above the movable contact spring 76, the magnetic pole 71 of the electromagnet block 15 and the permanent magnet 17 are arranged.
A hole 37b into which the convex portion 36 formed in the upper surfaces of the side walls 21e and 21f of the U-shaped insulating support 21b is inserted is formed. Above the magnetic pole 71 and the permanent magnet 17, an armature 20 formed in a substantially flat plate shape with a soft magnetic material such as electromagnetic soft iron is arranged, and on the lower surface of the armature 20,
Recesses 35 that engage with the protrusions 36 formed on the upper surfaces of the side walls 21e and 21f of the insulating support 21b are formed. The one-way connecting means 32b is a protrusion 36 of a hooking portion formed on the upper surfaces of the side walls 21e and 21f of the insulating support 21b.
And the recessed portion 35 of the engaged portion formed in the armature 20.
It is composed of In the fifth contact pressure stabilizing mechanism, a magnetic flux concentrator 27c is provided in a substantially central portion of the armature 20 so as to face the permanent magnet 17. Also in the eleventh embodiment of the present invention configured as described above,
The same effect as that of the seventh embodiment of the present invention can be obtained.

FIG. 38 is a cross-sectional view of an essential part showing a sixth contact pressure stabilizing mechanism, in which the armature 2 is provided at a substantially central portion of the permanent magnet 17.
The magnetic flux concentrator 27d is provided so as to face 0. In the twelfth embodiment of the present invention which employs the sixth contact pressure stabilizing mechanism instead of the fifth contact pressure stabilizing mechanism, the same effect as that of the eleventh embodiment of the present invention can be obtained. You can

FIG. 39 is a cross-sectional view of an essential part showing the seventh contact pressure stabilizing mechanism. An attachment member 30c made of an elastic member such as rubber is provided between the armature 20 and the bottom surface of the insulating support 21b.
Is constructed. Also in the thirteenth embodiment of the present invention which employs the seventh contact pressure stabilizing mechanism, the same effect as that of the ninth embodiment of the present invention can be obtained.

FIG. 40 is a sectional view of an essential part showing the eighth contact pressure stabilizing mechanism, in which an elastic member, for example, an anchoring device 30d made of a coil spring is interposed between the armature 20 and the bottom surface of the insulating support 21b. It is a thing. In the fourteenth embodiment of the present invention which employs the eighth contact pressure stabilizing mechanism instead of the seventh contact pressure stabilizing mechanism, the thirteenth aspect of the present invention is also adopted.
The same effect as that of the embodiment can be obtained.

41 to 43 are views showing a fifteenth embodiment of the present invention, in which a coil 69 is wound and an iron core 64 having magnetic poles 71, 71 at both ends and a permanent magnet 72 are provided. In the direction orthogonal to the movable contact spring 76 in which the movable contact 77 made of a noble metal tip of bulky is fixed to both ends of the electromagnet block 62 and the armature 19 by electric welding, the insulating support 21 a, and the center of the movable contact spring 76. The armature block 18a including a support spring 78 that extends and is fixed to the housing 51, and the common terminal 5
8. A housing 51 for mounting the electromagnet block 62 and the armature block 18a, and a housing 51 for mounting the electromagnet block 62 and the armature block 18 and a stationary contact terminal 56 and a coil terminal 60 to which a stationary contact 55 composed of a bulky precious metal tip is electrically connected by electric welding. It is composed of a fitted case (not shown), and the movable contact spring 76 and the support spring 78, the armature 19, the magnetic pole 71, and the permanent magnet 72 are layered in this order from the side close to the bottom of the housing 51 to the insulating support 21a. The hooking portion provided and the hooked portion provided on the armature 19 constitute a one-way connecting means 32a, which divides the movable contact spring 76 and the armature 19 and operates independently via the insulating support 21a. Is configured. At the center of the movable contact spring 76, an insulative support 21a made of an insulating material such as synthetic resin and having a substantially U-shaped cross section is provided.
It is also insert molded. Insulating support 21
Engagement pieces 33 are formed on the upper surfaces of the side walls 21c and 21d which are the free ends of a. An armature 19 formed of a soft magnetic material such as electromagnetic soft iron in a substantially flat plate shape is arranged above the movable contact spring 76, and the armature 19 has side walls 21c and 21 formed on an insulating support 21a.
A hole 37 into which d is inserted is formed, the side walls 21c and 21d of the insulating support 21a and the engaging piece 33 are inserted and fixed in the hole 37, and the movable contact spring 76 and the armature 19 are configured separately. . Above the armature 19, the magnetic pole 71 of the electromagnet block 62 and the permanent magnet 72 are arranged. The permanent magnet 72 has a substantially flat plate shape and is magnetized so that both ends have the same pole and substantially the center has different poles, and the permanent magnet 72 is provided between the magnetic poles 71, 71 that are end portions of the iron core 64. In the one-way connecting means 32a, as described above, the side walls 21c and 21d formed on the insulating support 21a having a U-shaped cross section penetrate through the holes 37 formed in the armature 19 to form the side walls 21c and 2d.
A hooking piece 33, which is a hooking portion provided at the end of 1d, is configured to engage with a hole 37 that is a hooked portion of the armature 19. Contact pressure stabilization mechanism is armature 1
9, a magnetic flux concentrator 27a is provided so as to face the permanent magnet 72 at a substantially central portion. The magnetic flux concentrator 27a concentrates the magnetic flux passing through the substantially central portion of the armature 19 and the permanent magnet 72. Since the magnetic flux concentrates in a narrow range by the magnetic flux concentrator 27a, the magnetic attraction force acting between the substantially central portion of the armature 19 and the permanent magnet 72 becomes larger than that in the case where the magnetic flux concentrator 27a is not provided. Therefore, even if the movable contact 77 and the fixed contact 55 come into contact with each other to cause the movable contact spring 76 to bend, the one-way coupling means 32a.
The engagement of the movable contact spring 7 does not come off, and the desired movable contact spring 7
Since the deflection of 6 is obtained, the movable contact 77 and the fixed contact 5
The contact pressure with 5 is stable, and the contact resistance is also stable. In the fifteenth embodiment of the present invention, the displacement stopper 25
The magnetic flux concentrator 27 is provided by providing a on the housing 51 with a being in contact with the upper portion of the support spring 78 or being slightly separated.
The magnetic attraction generated by a causes the armature 19
Since the support spring 78 can be restricted from being displaced in the upward direction when the support spring 7 is displaced in the upward direction,
The durability life of 8 can be further improved, and
Since a more stable contact pressure can be obtained, the contact bounce phenomenon can be further prevented.

44 to 46 show a sixteenth embodiment of the present invention, in which the movable contact spring 76 and the support spring 78, the magnetic pole 71 and the permanent magnet 17 are arranged from the side near the bottom of the housing 51. , The armature 20 is layered in this order, and the side portions 21e and 21f of the insulating support 21b are made of the permanent magnet 17 by the engaging portion provided at the end of the insulating support 21b and the engaged portion formed in the armature 20. Hole 37
The unidirectional coupling means 32b is formed by penetrating b and 37b, and the movable contact spring 76 and the armature 20 are divided so that they operate independently. An insulating support 21b having a U-shaped cross section made of an insulating material such as a synthetic resin is insert-molded together with the movable contact spring 76 at the center of the movable contact spring 76. A cylindrical convex portion 36 is formed on the upper surfaces of the side walls 21e and 21f which are free ends of the support 21b. The magnetic pole 71 of the electromagnet block 15 and the permanent magnet 17 are arranged above the movable contact spring 76, and the permanent magnet 17 has protrusions formed on the upper surfaces of the side walls 21e and 21f of the U-shaped insulating support 21b. A hole 37b into which the portion 36 is inserted is formed.
Above the magnetic pole 71 and the permanent magnet 17, an armature 20 formed of a soft magnetic material such as electromagnetic soft iron into a substantially flat plate shape.
And a concave portion 35 that engages with the convex portion 36 formed on the upper surfaces of the side walls 21e and 21f of the insulating support 21b is formed on the lower surface of the armature 20. The one-way connecting means 32b includes side walls 21e of the insulating support 21b,
It is composed of a convex portion 36 of the engaging portion formed on the upper surface of 21f and a concave portion 35 of the engaged portion formed on the armature 20. The contact pressure stabilizing mechanism includes a magnetic flux concentrator 2 at a substantially central portion of the armature 20 so as to face the permanent magnet 17.
7c is projected. In the sixteenth embodiment of the present invention, the displacement stopper 25b is provided in the housing 51 so as to be in contact with the lower portion of the support spring 78 or in a state of being slightly separated from the lower portion of the support spring 78. Since the support spring 78 can be restricted from being displaced downward as the armature 20 is displaced downward, the durability life of the support spring 78 can be further improved and the stability is further stabilized. Since the contact pressure can be obtained, the contact bounce phenomenon can be further prevented.

47 to 49 are views showing a seventeenth embodiment of the present invention, in which reference numeral 1 denotes a housing, which is an insulating substrate 2 made of ceramic, glass-coated metal or the like, and a copper alloy thin plate or the like is pressed. Each terminal group such as a fixed contact terminal 5, a common terminal 8 and a coil terminal 11 formed by processing is provided, and a fixed contact 4 made of a fired body of a metal thick film paste such as a noble metal is provided.

By the way, the conventional housing 51 is provided with a fixed contact terminal 56, a common terminal 58, each terminal such as a coil terminal 60, and a fixed contact 55, and a conductive thin plate such as a copper alloy is formed by pressing or the like. The fixed contact terminal 56, the common terminal 58, the coil terminal 60, and the like, which are molded into a desired shape, are insert-molded with a molding material such as a synthetic resin so that one end thereof projects from the lower surface of the housing 51 ( See FIG. 69 and below of the conventional example). However, since the shape of each terminal such as the fixed contact terminal 56 is complicated, there is a problem that the insert molding die becomes complicated and the cost becomes high. Also, when changing the terminal arrangement,
Since it is necessary to change the mold, there is a problem that the terminal arrangement cannot be changed easily and the cost becomes high. Further, since the fixed contact terminal 56 and the like of the housing 51 are insert-molded with synthetic resin or the like, heat conduction is poor, and when the coil 69 is energized, the terminals 56, 58 and 60, the fixed contact 55, and the terminal joint portions 57 and 57, respectively. A temperature difference occurs at 59, 61 and the like. As a result, the fixed contact terminal 56 and the common terminal 58
Thermoelectromotive force is generated during this, and when used in a small signal circuit, this thermoelectromotive force has been a problem. Also, depending on the current and voltage conditions used, heat is generated by the contact resistance of the contact or heat is generated by discharge, and heat conduction is poor, so these heat cannot be dissipated, and contact life is shortened, such as contact welding. There was a problem. Furthermore, since the fixed contact terminal 56 and the common terminal 58, which are signal lines, are insert-molded with synthetic resin or the like, the high frequency characteristics are insufficient, and in the market of high frequency communication such as mobile communication and digital communication, the high frequency characteristics are high. A good electromagnetic relay has been desired. in addition,
Since the fixed contact 55 is formed by electrically welding a bulky noble metal tip to the fixed contact joint portion 57,
The height of the fixed contact 55 varies due to the state of electric welding, the complicated shape of the terminal, and the insert molding, and the distance between the fixed contact 55 and the movable contact 77 is different for each contact. , The contact pressure of each contact varies, which promotes the bounce phenomenon.
There is a problem in that the operation timing varies and the reliability of the electromagnetic relay decreases. This has been a problem especially in multi-contact electromagnetic relays. In addition, if the welding state is insufficient, the thermal resistance between the fixed contact 55 and the fixed contact joint portion 57 becomes large, and especially when used under the condition that arc discharge occurs, the contact is consumed rapidly and the contact life is shortened. There was a problem that was shortened.

In the seventeenth embodiment of the present invention,
The movable contact spring 76, the support spring 78a, the armature 19, the magnetic pole 71, and the permanent magnet 72 are layered in this order from the side closer to the bottom of the housing 1, and the engaging portion provided on the insulating support 21a and the engaged portion provided on the armature 19 are arranged. Depending on the department
The movable contact spring 76 and the armature 19 are divided and provided with a one-way connecting means 32a configured to operate independently.

50 to 52 are views for explaining the housing 1 according to the seventeenth embodiment of the present invention. The insulating substrate 2 is shown in FIG.
A fixed contact terminal joint portion 6, a common terminal joint portion 9, a coil terminal joint portion 12 and the like, which are made of a fired body of a metal thick film paste such as a copper alloy, are formed on the lower surface of the common terminal. Each lead portion such as the lead portion 10 and the coil terminal lead portion 13 is formed of a fired body of a metal thick film paste such as a copper alloy, and the fixed contact terminal joint portion 6, the common terminal joint portion 9, and the coil terminal joint portion 12, respectively. It is electrically connected.
The fixed contact lead portion 7 is formed on the upper surface of the insulating substrate 2 by a fired body of a thick metal film paste such as a copper alloy.
A plurality of through holes 3 are formed at desired locations on the insulating substrate 2, and fixed contact terminals 5, common terminals 8, coil terminals 11, etc. are inserted and fixed from the lower surface of the insulating substrate 2. The terminals 5, 8 and 11 are electrically connected to the joints 6, 9 and 12 formed on the lower surface of the insulating substrate 2 by soldering. Further, the fixed contact lead portion 7 and the fixed contact terminal joint portion 6 are electrically connected to each other by appropriately using a known method such as forming a fired body of a thick metal film paste inside the through hole 3. You can The fixed contact lead portion 7, the common terminal lead portion 10, the coil terminal lead portion 13, and the joint portions 6, 9 and 12 should be formed on either surface of the insulating substrate 2 using the through holes 3. You can Further, instead of the through hole 3, a notch may be formed at the end of the insulating substrate. The fixed contact 4 is formed by printing and firing a thick film paste containing a desired metal in a desired pattern on the upper surface of the fixed contact joint portion 6 by a known method such as screen printing. Therefore, the contact height can be easily adjusted only by controlling the thickness of the thick film paste to be printed. Furthermore, each joint 6, 9, 12, each fixed contact lead 7, common terminal lead 10, coil terminal lead 13
Etc. are formed in the same manner as the fixed contact 4, so that the base 5 can be formed by insert molding like a conventional electromagnetic relay.
Unlike the fixed contact 55 in which a bulky noble metal chip made of a clad material or the like is fixedly formed on the upper surface of the fixed contact terminal 56 integrated with 2, by a method such as electric welding, the height of the fixed contact 4 varies. Does not happen.

53 and 54 are views for explaining the armature block 18c according to the seventeenth embodiment of the present invention, in which the armature block 18c has the movable contact spring 76, the insulating support 21a and the center of the movable contact spring 76. The movable contact spring 76 has a support spring 78a extending in a more orthogonal direction, and an insulating support 21a having a U-shaped cross section made of an insulating material such as synthetic resin is provided at the center of the movable contact spring 76. 7
6 is insert-molded together with the insulating support 2
Engagement pieces 33 are formed on the upper surfaces of the side walls 21c and 21d of 1a. Support springs 78a that are electrically and mechanically integrated with the movable contact spring 76 are formed so as to extend in directions orthogonal to the longitudinal center of the movable contact spring 76, respectively.
Further, the tip thereof is bent at a substantially right angle, and a predetermined through hole 3 provided in the insulating substrate 2 of the housing 1 is provided.
And is electrically connected to the common terminal 8 by being soldered to the common terminal joint portion 6. Support spring 7
Since 8a is directly soldered to the common terminal joint portion 6, reliability is improved. An armature 19 formed of a soft magnetic material such as electromagnetic soft iron in a substantially flat plate shape is arranged above the movable contact spring 76, and the side walls 21c and 21d formed on the insulating support 21a are inserted into the armature 19. 37 is formed in the insulating support 21.
The side walls 21c and 21d of "a" are engaged with the engaging piece 33 to form the one-way connecting means 32a. Further, if the armature block 18c is provided with the block frame 38 as shown in FIGS. 55 and 56, the adhesiveness to the insulating substrate 2 is improved and the reliability is further improved.

In the seventeenth embodiment of the present invention,
It is possible to reduce the occurrence of the bounce phenomenon and further improve the durable life of the support spring 78a. In addition, as described in the fourth embodiment of the present invention, the impact vibration of the armature 19 can be absorbed by interposing the plastic sheet between the armature and the magnetic pole, so that the bounce phenomenon can be further prevented. It can be reduced, and the durable life of the support spring 78a can be further improved. In the seventeenth embodiment of the present invention, the one-way coupling means 32a is adopted as the armature block, and the movable contact spring 76 and the support spring 78a, the armature 19, the magnetic pole 71, and the magnetic pole 71 from the side close to the bottom of the housing 1. Although the permanent magnets 72 are hierarchically arranged in this order, the present invention is not limited to this, and the one-way coupling means 32b is adopted, and the movable contact spring 76 and the support spring 78a, the magnetic pole 71, and the Of course, the permanent magnet 17 and the armature 20 may be layered in this order. Further, also in the armature block in which the armature 75 and the movable contact spring 76 are integrated by the insulating support 79, a stopper for restricting the upward or downward displacement of the support spring due to the displacement of the armature is used. Therefore, the same effect can be obtained.

In the seventeenth embodiment of the present invention,
By using the insulating substrate 2 made of ceramic or the like, the heat conduction is good, the temperature distribution in the insulating substrate 2 is small, and the thermoelectromotive force between the fixed contact terminal 5 and the common terminal 8 is also small. It is suitable for signal measurement, and the signal noise is at a sufficiently low level, so that a higher performance electromagnetic relay can be provided. Further, since the insulating substrate 2 is used, the fixed contact 4 and the fixed contact lead portion 7 are formed of a fired body of a metal thick film paste in addition to good heat conduction, so that the fixed contact 4 and the fixed contact lead portion 7 are formed. The thermal resistance between them becomes small, and the contact life can be extended even when used under the condition of arc discharge. Furthermore, by using a known screen printing method or the like, a thick film paste containing a desired metal is printed and fired in a desired pattern to form a fixed contact height, which allows easy adjustment of the height of the fixed contacts and produces less variation in mass production. And the terminal arrangement can be changed easily. Especially,
In an electromagnetic relay having a large number of contacts, the contact pressure between the contacts is stable and the operation timings are the same, so the reliability of the electromagnetic relay can generally be improved. In addition, by using a ceramic substrate,
A microstrip line or a coplanar line can be easily formed. By forming the fixed contact lead part 7 and the common terminal lead part 10 which are signal lines by the microstrip line or the coplanar line, an electromagnetic relay having excellent high frequency characteristics can be configured. can do.

Eighteenth embodiment of the present invention (not shown)
In addition to the seventeenth embodiment of the present invention, the movable contact (for example, reference numeral 77 in FIG. 54) is formed of a fired body of a thick film metal paste such as a noble metal. Since the movable contacts are formed on both ends of the movable contact spring 76 by printing and firing a thick film paste containing a desired metal into a desired pattern by a known method such as screen printing, the movable contacts are formed. The thermal resistance between 77 and the movable contact spring 76 becomes small, and the contact life can be extended even when used under the condition of arc discharge. Furthermore, since a thick film paste containing a desired metal can be printed and fired in a desired pattern by a known screen printing method or the like, the height of the movable contact can be easily adjusted for accuracy. It is possible to improve mass productivity with less variation. In particular, in an electromagnetic relay having a large number of contacts, the contact pressure between the contacts is stable and the operation timing is the same, so the reliability of the electromagnetic relay can be further improved.

57 to 59 show a nineteenth embodiment of the present invention, in which reference numeral 1 denotes a housing, which is an insulating substrate 2 made of ceramic or glass-coated metal or the like, and a copper alloy thin plate or the like is pressed. Fixed contact terminal 5 formed by processing,
Each terminal group such as a common terminal 8 and a coil terminal 11 is provided, and a fixed contact 4 made of a fired body of a thick metal film paste of a noble metal or the like is provided. 78a, armature 19, magnetic pole 7
1 and the permanent magnet 72 in this order, and the insulating support 21a.
The one-way connecting means 32 configured such that the movable contact spring 76 and the armature 19 are divided and operated independently by the engaging portion provided on the armature 19 and the engaged portion provided on the armature 19.
a, and a permanent magnet 72 is provided substantially in the center of the armature 19.
It employs a contact pressure stabilizing mechanism in which a magnetic flux concentrator 27a is provided so as to face with.

In the nineteenth embodiment of the present invention thus constructed, the same effect as that of the eighteenth embodiment of the present invention can be obtained, and at the same time as the seventh embodiment of the present invention. The same effect can be obtained. The contact pressure stabilizing mechanism is not limited to the magnetic flux concentrator 27a.

60 to 62 show a twentieth embodiment of the present invention, in which reference numeral 1 denotes a housing, which is an insulating substrate 2 made of ceramic or glass-coated metal or the like, and a copper alloy thin plate or the like is pressed. Fixed contact terminal 5 formed by processing,
Each terminal group such as a common terminal 8 and a coil terminal 11 is provided, and a fixed contact 4 made of a fired body of a metal thick film paste such as a noble metal is provided. The contact pressure stabilizing mechanism in which the concentrating body 27c is provided is adopted. In the twentieth embodiment of the present invention thus configured, the same effect as that of the nineteenth embodiment of the present invention can be obtained.

63 to 65 show a twenty-first embodiment of the present invention. In addition to the nineteenth embodiment of the present invention, a displacement stopper 25c and a support spring 78 are further provided.
Block frame 3 in contact with the top of a or slightly apart
8 is provided. In the twenty-first embodiment of the present invention thus configured, the magnetic attraction force generated by the magnetic flux concentrator 27a causes an upward movement of the support spring 78a which occurs as the armature 19 is displaced upward. Since the displacement can be regulated, the durability life of the support spring 78a can be further improved, more stable contact pressure can be obtained, and the bounce phenomenon of the contact can be further prevented.

66 to 68 show a 22nd embodiment of the present invention. In addition to the 20th embodiment of the present invention, a displacement stopper 25d and a support spring 78 are further provided.
Block frame 3 in contact with the bottom of a or slightly apart
8 is provided. In the twenty-second embodiment of the present invention thus configured, the downward direction of the support spring 78a generated as the armature 20 is displaced downward by the magnetic attractive force generated by the magnetic flux concentrator 27c. Since the displacement can be regulated, the durability life of the support spring 78a can be further improved, more stable contact pressure can be obtained, and the bounce phenomenon of the contact can be further prevented.

[0062]

As is apparent from the above description, the following effects can be obtained in the present invention.

(1) In an electromagnetic relay including an electromagnet block, an armature block, a housing in which the electromagnet block and the armature block are mounted, and a case fitted on the housing, a support spring generated as the armature swings. Since a stopper that restricts the upward or downward displacement is provided, electromagnetic force is generated in the magnetic poles by exciting the coil of the electromagnet block,
When the armature is attracted by this electromagnetic force and the armature reverses and swings, the upward or downward displacement of the support spring due to the impact vibration generated between the armature and the magnetic pole is regulated, and the impact vibration of the armature is suppressed. Since it can be damped, it is possible to prevent the occurrence of the bounce phenomenon and to improve the durable life of the support spring. Also, since the occurrence of bounce phenomenon can be prevented,
The contact can be switched at high speed and can be used for equipment that requires high-speed switching. Further, since it is possible to prevent the occurrence of the bounce phenomenon, it is possible to improve the contact life even under the discharge generation condition.

(2) In an electromagnetic relay including an electromagnet block, an armature block, a housing for mounting the electromagnet block and the armature block, and a case fitted on the housing, the displacement of the armature is reduced as the armature operates. The impact generated by the collision between the armature and the magnetic pole by swinging the movable contact spring and the armature between the pair of magnetic poles about the support spring through the one-way connecting means that transmits only in the direction. Of the vibrations, the shock vibration in the direction in which the armature deviates from the stable state to the maximum is not transmitted to the movable contact spring and the support spring, so the occurrence of bounce phenomenon can be reduced and the durable life of the support spring is improved. be able to.

(3) By providing the contact pressure stabilizing mechanism in addition to the one-way connecting means, the engagement of the one-way connecting means when the movable contact and the fixed contact come into contact with each other becomes strong, and the contact spring of a predetermined contact spring is secured. Since the deflection is obtained and a higher contact pressure is obtained, the contact resistance can be further stabilized.

(4) In addition to the one-way connecting means, a contact pressure stabilizing mechanism composed of a magnetic flux concentrator is provided, and further, the magnetic attraction force generated by the magnetic flux concentrator causes the armature to be displaced upward or downward. Accordingly, a displacement stopper that restricts the support spring from displacing in the upward or downward direction is provided in contact with the upper or lower part of the support spring or in a state of being slightly separated, thereby further improving the durable life of the support spring. In addition to being able to improve, it is possible to obtain a more stable contact pressure and further prevent the contact bounce phenomenon.

(5) By interposing a non-magnetic sheet such as a plastic sheet member between the armature and the magnetic pole, it is possible to absorb the shock vibration generated when the armature is oscillated in the reverse direction. The impact noise can be reduced, and the impact vibration generation time can be shortened. In addition, the effect of preventing the bounce phenomenon is improved, the durability life of the support spring can be further improved, and the generation of wear powder due to fine movement wear can be prevented, and the life of the contact can be improved.
Furthermore, by forming the magnetic residual gap with a plastic sheet, the magnetic residual gap can be easily adjusted and variations can be reduced.

(6) The housing is mounted with an insulating substrate made of ceramic or glass-coated metal, a fixed contact made of a fired body of thick film paste formed on the insulating substrate, an armature block and an electromagnet block. Since the mounting part is provided and the coil terminal, common terminal, and fixed contact terminal are provided under the insulating substrate, the height of the fixed contact can be easily adjusted, there is little variation, and mass productivity is improved, and the terminal layout is changed. Can be done easily. In addition, the thermoelectromotive force is reduced, and it can be used for small signal circuits.
Since the heat dissipation is good, the contact life can be extended even when used under the condition of arc discharge. In particular, in an electromagnetic relay having a large number of contacts, the contact pressure between the contacts is stable and the operation timing is the same, so the reliability of the electromagnetic relay is further improved. Furthermore, by using a ceramic substrate, it is easy to form microstrip lines and coplanar lines.By forming the fixed contact lead parts and common terminal lead parts that are signal lines with microstrip lines and coplanar lines, high frequency An electromagnetic relay with good characteristics can be obtained.

(7) Through holes are formed in the insulating substrate, and the electromagnetic relay is constructed by electrically connecting the constituent members provided on the upper surface of the insulating substrate and the lower surface of the insulating substrate through the through holes. Therefore, the electrical connection between the upper surface and the lower surface of the insulating substrate becomes easy, and the mass productivity can be improved.

(8) Since the electromagnetic relay is constructed by forming the movable contacts at both ends of the movable contact spring by the fired body of thick film paste, the thermal resistance between the movable contact and the movable contact spring is reduced. The contact life can be extended even when used under conditions where arc discharge occurs.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a cross-sectional view of the second embodiment of the present invention.

FIG. 5 is a cross-sectional view of a third embodiment of the present invention.

FIG. 6 is a plan view of a fifth embodiment of the present invention.

FIG. 7 is a sectional view taken along the line VII-VII of FIG. 6;

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a plan view of an armature block according to a fifth embodiment of the present invention.

FIG. 10 is a front view of an armature block according to a fifth embodiment of the present invention.

11 is a sectional view taken along line XI-XI of FIG.

FIG. 12 is a bottom view of the armature block according to the fifth embodiment of the present invention.

FIG. 13 is an operation explanatory diagram of the armature according to the fifth embodiment of the present invention.

FIG. 14 is an observation view of the contact operation status of the conventional structure and the contact operation status of the fifth embodiment of the present invention.

FIG. 15 is a plan view of the sixth embodiment of the present invention.

16 is a sectional view taken along line XVI-XVI of FIG.

17 is a sectional view taken along line XVII-XVII of FIG.

FIG. 18 is a plan view of an armature block according to a sixth embodiment of the present invention.

FIG. 19 is a front view of an armature block according to a sixth embodiment of the present invention.

20 is a sectional view taken along line XX-XX in FIG.

FIG. 21 is a bottom view of the armature block according to the sixth embodiment of the present invention.

FIG. 22 is an operation explanatory diagram of the armature according to the sixth embodiment of the present invention.

FIG. 23 is a view showing the engagement state of the one-way connecting means when the contact pressure according to the fifth embodiment of the present invention is increased.

FIG. 24 is a view showing the engagement state of the one-way connecting means when the contact pressure according to the sixth embodiment of the present invention is increased.

FIG. 25 is a plan view of the seventh embodiment of the present invention.

26 is a cross-sectional view taken along the line XXVI-XXVI of FIG. 25.

27 is a cross-sectional view taken along the line XXVII-XXVII in FIG. 25.

FIG. 28 is a cross-sectional view of an essential part showing the first contact pressure stabilizing mechanism of the present invention.

FIG. 29 is an operation explanatory view of the armature adopting the first contact pressure stabilizing mechanism of the present invention.

FIG. 30 is a cross-sectional view of essential parts showing a second contact pressure stabilizing mechanism of the present invention.

FIG. 31 is a cross-sectional view of essential parts showing a third contact pressure stabilizing mechanism of the present invention.

FIG. 32 is an operation explanatory view of the armature adopting the third contact pressure stabilizing mechanism of the present invention.

FIG. 33 is a cross-sectional view of essential parts showing a fourth contact pressure stabilizing mechanism of the present invention.

FIG. 34 is a plan view of the eleventh embodiment of the present invention.

35 is a sectional view taken along the line XXXV-XXXV in FIG. 34.

36 is a sectional view taken along the line XXXVI-XXXVI of FIG. 34.

FIG. 37 is a cross-sectional view of the essential parts showing the fifth contact pressure stabilizing mechanism of the present invention.

FIG. 38 is a sectional view of a key portion showing a sixth contact pressure stabilizing mechanism of the present invention.

FIG. 39 is a sectional view of a key portion showing a seventh contact pressure stabilizing mechanism of the present invention.

FIG. 40 is a sectional view of a key portion showing an eighth contact pressure stabilizing mechanism of the present invention.

FIG. 41 is a plan view of a fifteenth embodiment of the present invention.

42 is a sectional view taken along the line XLII-XLII of FIG. 41.

43 is a sectional view taken along the line XLIII-XLIII in FIG. 42.

FIG. 44 is a plan view of the sixteenth embodiment of the present invention.

45 is a sectional view taken along the line XLV-XLV in FIG. 44.

FIG. 46 is a sectional view taken along the line XLVI-XLVI of FIG. 44.

FIG. 47 is a plan view of the seventeenth embodiment of the present invention.

FIG. 48 is a front view of the seventeenth embodiment of the present invention.

49 is a sectional view taken along the line XLIX-XLIX of FIG. 47.

FIG. 50 is a plan view of the housing according to the seventeenth embodiment of the present invention.

FIG. 51 is a front view of the housing according to the seventeenth embodiment of the present invention.

52 is a side view of the housing according to the seventeenth embodiment of the present invention. FIG.

FIG. 53 is a plan view of the armature block according to the seventeenth embodiment of the present invention.

FIG. 54 is a front view of the armature block according to the seventeenth embodiment of the present invention.

FIG. 55 is a plan view of an armature block including a block frame according to a seventeenth embodiment of the present invention.

56 is a cross-sectional view taken along the line LVI-LVI of FIG. 55.

FIG. 57 is a plan view of the nineteenth embodiment of the present invention.

58 is a cross-sectional view taken along the line LVIII-LVIII of FIG. 57.

59 is a LIX-LIX sectional view of FIG. 57;

FIG. 60 is a plan view of the twentieth embodiment of the present invention.

61 is a cross-sectional view taken along the line LXI-LXI of FIG. 60.

62 is a sectional view taken along line LXII-LXII in FIG. 60.

FIG. 63 is a plan view of the twenty-first embodiment of the present invention.

64 is a cross-sectional view taken along the line LXIV-LXIV of FIG. 63.

65 is a cross-sectional view taken along the line LXV-LXV of FIG. 63.

FIG. 66 is a plan view of the twenty-second embodiment of the present invention.

67 is a cross-sectional view taken along the line LXVII-LXVII in FIG. 66.

68 is a cross-sectional view taken along the line LXVIII-LXVIII in FIG. 66.

FIG. 69 is an exploded perspective view of a conventional example.

FIG. 70 is a plan view of a conventional example.

71 is a cross-sectional view taken along the line LXXI-LXXI of FIG. 70.

72 is a cross-sectional view taken along the line LXXII-LXXII of FIG. 70.

FIG. 73 is a plan view of a conventional armature block.

FIG. 74 is a front view of a conventional armature block.

75 is a cross-sectional view taken along the line LXXV-LXXV of FIG. 73.

FIG. 76 is a bottom view of the conventional armature block.

77 is an operation explanatory view of the armature of the conventional example. FIG.

FIG. 78 is an operation explanatory view of a conventional support spring.

[Explanation of symbols]

1: housing, 2: insulating substrate,
3: Through hole, 4: Fixed contact, 5:
Fixed contact terminal, 6: fixed contact terminal joint part, 7: fixed contact lead part, 8: common terminal,
9: Common terminal joint portion, 10: Common terminal lead portion, 11: Coil terminal, 12: Coil terminal joint portion, 13: Coil terminal lead portion, 15: Electromagnet block, 17: Permanent magnet, 18a, 18
b, 18c: Armature block, 19, 19a, 1
9b, 20, 20a, 20b: armature, 21a,
21b: Insulating support, 21c, 21d, 21e, 21
f: side walls, 24a, 24b, 24c, 24d, 24e,
24f: stopper, 25a, 25b, 25c, 25d:
Displacement stoppers 27a, 27b, 27c, 27d: magnetic flux concentrators, 30a, 30b, 30c, 30d: anchors, 3
2a, 32b: one-way connecting means, 33, 33a, 33
b: Engagement piece, 35, 35a, 35b: Recessed portion, 36, 36
a, 36b: convex portion, 37, 37b: hole,
38: Block frame, 51: Housing,
51a: partition wall, 52: side wall, 53: coil storage chamber,
54: Armature storage chamber, 55, 55a, 5
5b: fixed contact, 56: fixed contact terminal, 5
7: fixed contact joint, 58: common terminal,
59: common terminal joint, 60: coil terminal,
61: Coil terminal joint part, 62: Electromagnet block, 63: Electromagnet part, 64: Iron core, 66: Spool, 67: Collar, 68: Coil lead terminal, 69: Coil, 70: Coil lead wire, 71, 71a, 71b : Magnetic pole, 72:
Permanent magnet, 73: Armature block, 75, 75a, 75b: Armature, 76: Moving contact spring, 77, 77a, 77b: Moving contact, 78, 78a: Support spring, 79: Insulating support, 82: Case.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsuneo Horie 110-1 Shinkushita Nitta, Iruma City, Saitama Prefecture Copal Electronics Co., Ltd. (72) Tsutomu Hojo 110-1 Shinta Shigita, Iruma City, Saitama Prefecture Copal Electronics Co., Ltd.

Claims (23)

[Claims] 1. An electromagnet block including an iron core around which a coil is wound and a permanent magnet, an armature, a movable contact spring, an insulating support and a movable contact spring which extend in a direction orthogonal to the center and are fixed to a housing. The armature and the movable contact spring are integrated by an insulating support, and the armature block swings reversibly with respect to a pair of magnetic poles around the support spring, a common terminal, a fixed contact terminal, In an electromagnetic relay consisting of a housing equipped with a coil terminal, on which an armature block and an electromagnet block are mounted, and a case externally fitted to the housing, regulate the upward or downward displacement of the support spring that occurs when the armature swings. An electromagnetic relay characterized by being provided with a stopper that 2. The stopper for restricting the upward or downward displacement of the support spring is provided in the housing in a state of being in contact with or slightly apart from the upper or lower portion of the support spring. Electromagnetic relay. 3. The stopper for restricting the upward or downward displacement of the support spring is in contact with or slightly separated from the lower surface or the upper surface of the insulating support of the armature block, or the lower surface of the permanent magnet or the bottom of the housing. The electromagnetic relay according to claim 1, wherein the electromagnetic relay is provided on the upper surface. 4. The stopper for restricting the upward or downward displacement of the support spring is in contact with or slightly separated from the lower surface of the permanent magnet or the upper surface of the housing bottom, and the upper surface of the insulating support of the armature block or The electromagnetic relay according to claim 1, wherein the electromagnetic relay is provided on a lower surface. 5. An electromagnet block composed of an iron core around which a coil is wound and a permanent magnet, an armature, a movable contact spring, an insulating support, and an insulating support and a movable contact spring extending in a direction orthogonal to the center and fixed to a housing. In an electromagnetic relay consisting of an armature block consisting of a support spring, a common terminal, a fixed contact terminal, a coil terminal, a housing for mounting the electromagnet block and the armature block, and a case externally fitted to the housing, there is insulation between the armature and The armature block is provided with a unidirectional connecting means for independently transmitting the displacement of the armature in only one direction by configuring the support body independently, and by exciting the coil,
An electromagnetic relay characterized in that a movable contact spring and an armature are configured to swing between a pair of magnetic poles with a support spring as a core so as to be reversible. 6. The one-way connecting means comprises a movable contact spring, a support spring, an insulating support, an armature, a permanent magnet, and a magnetic pole, which are arranged in this order from the side near the bottom of the housing. Utilizing the fact that the armature is attracted upwards or to the magnetic poles by the magnetic flux generated by the excitation, the engaging part is pulled up by engaging the engaging part provided on the insulating support with the engaged part provided on the armature. The electromagnetic relay according to claim 5, wherein: 7. The one-way connecting means comprises a hooking portion provided on the insulating support and a hooked portion provided on the armature, and the hooking portion is provided through a hole formed on the armature or a side portion of the armature. The electromagnetic relay according to claim 6, wherein the electromagnetic relay engages with the engaged portion. 8. The one-way connecting means comprises a hooking piece of a hooking portion formed at a free end of the insulating support and a hole of a hooked portion provided on the armature, wherein the hooking portion of the insulating support is an armature. When the armature is attracted to one of the magnetic poles and displaced by the excitation of the coil in a predetermined direction, the one-way connecting means causes the contact spring due to the collision between the armature and the magnetic pole. The electromagnetic relay according to claim 6 or 7, characterized in that the transmission of vibrations to the electromagnetic relay is attenuated / relaxed. 9. The one-way connecting means comprises a movable contact spring, a support spring, an insulating support, a permanent magnet, a magnetic pole, and an armature, which are arranged in this order from the side near the bottom of the housing. Utilizing the fact that the armature is attracted downwards or to the magnetic poles by the magnetic flux generated by the excitation, the engaging part is pushed downward by the engagement between the engaging part provided on the insulating support and the engaged part provided on the armature. The electromagnetic relay according to claim 5, wherein the electromagnetic relay is provided. 10. The one-way connecting means comprises a hooking portion provided on the insulating support and a hooked portion provided on the armature,
The electromagnetic relay according to claim 9, wherein the engaging portion engages with the engaged portion through a hole formed in the permanent magnet or a side portion of the permanent magnet. 11. The one-way connecting means comprises a hooking projection formed on a free end of the insulating support and a hooked recess formed on the armature, and the hooking projection of the insulating support is formed on a permanent magnet. When the armature is attracted to one of the magnetic poles and displaced by the excitation of the coil in a predetermined direction, the one-way connecting means causes the contact spring due to the collision between the armature and the magnetic pole. The electromagnetic relay according to claim 9 or 10, characterized in that the transmission of vibrations to the electromagnetic relay is attenuated / relaxed. 12. The flexure of the contact spring caused when the movable contact and the fixed contact come into contact with each other, the engagement of the one-way coupling means is weakened, and the desired flexure of the contact spring cannot be obtained. 7. The electromagnetic relay according to claim 6, further comprising a contact pressure stabilizing mechanism that prevents the contact pressure of the device from decreasing. 13. A flexure of a contact spring generated when a movable contact and a fixed contact come into contact with each other, weakening the engagement of the one-way coupling means, and a desired flexure of the contact spring cannot be obtained. 10. The electromagnetic relay according to claim 9, further comprising a contact pressure stabilizing mechanism that prevents the contact pressure of the device from decreasing. 14. The electromagnetic relay according to claim 12, wherein the contact pressure stabilizing mechanism is a magnetic flux concentrator that concentrates the magnetic flux passing through the substantially central portion of the armature and the permanent magnet. 15. A magnetic flux concentrator is provided in a substantially central portion of an armature facing a permanent magnet.
4. Electromagnetic relay according to 4. 16. A magnetic flux concentrator is provided in a substantially central portion of a permanent magnet facing the armature.
4. Electromagnetic relay according to 4. 17. The electromagnetic relay according to claim 12 or 13, wherein the contact pressure stabilizing mechanism is a locker made of an elastic member interposed between the armature and the insulating support. 18. The electromagnetic relay according to claim 17, wherein the interlocking device is a leaf spring or a coil spring. 19. The electromagnetic relay according to claim 17, wherein the interlocking device is a columnar rubber such as a column or a prism. 20. A displacement stopper for restricting the upward displacement of the support spring generated by the magnetic attraction force of the magnetic flux concentrator is provided in contact with or slightly apart from the upper part of the support spring, or the magnetic flux is concentrated. 15. The electromagnetic system according to claim 14, wherein a displacement stopper that restricts downward displacement of the support spring generated by the magnetic attraction force of the body is provided in contact with a lower portion of the support spring or in a state of being slightly separated therefrom. relay. 21. A housing has an insulating substrate made of ceramic or glass-coated metal, a fixed contact made of a fired body of thick film paste formed on the insulating substrate, and a fixing portion for fixing an armature block and an electromagnet block. The insulating substrate is provided with a coil terminal, a common terminal, and a fixed contact terminal.
6, 7, 8, 9, 10, 11, 12, 13, 14, 1
The electromagnetic relay according to 5, 16, 17, 18, 19 or 20. 22. The movable contacts formed at both ends of the movable contact spring are made of a thick film paste fired body. 10, 1
1, 12, 13, 14, 15, 16, 17, 18, 1
The electromagnetic relay according to 9, 20, or 21. 23. A plastic sheet is interposed between the armature and the magnetic pole, wherein the plastic sheet is interposed between the armature and the magnetic pole.
4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 1
4, 15, 16, 17, 18, 19, 20, 21 or 22 electromagnetic relay.