JPH0676713A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To provide an electromagnetic relay composed of two kinds of contact types, a-contact type and b-contact type, capable of lessening investment in plant. CONSTITUTION:In an electromagnetic relay composed of two kinds of contact types, so called, b-contact type and a-contact type, where respective contact portions 5 are brought into closed conditions when a coil 2 are set in both conditions, non-excited and excited, a contact portion 5 is formed so as to be in the closed condition when an armature 4 is attracted, and in an opened condition when the armature 4 is released, and is used together. In the b-contact type electromagnetic relay, a permanent magnet 31, magnetized in a magnetic circuit direction, is interposed in-between a yoke 3 among a core 1, the yoke 3, and the armature 4 so as to bring the armature 4 into an attracted condition when the coil 2 is in a non-excited condition. In the a-contact type electromagnetic relay, no permanent magnet 31 is interposed in any of the core 1, the yoke 3, and the armature 4 so as to bring the armature 4 into an attracted condition when the coil 2 is in an excited condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called b-contact type and a-contact type electromagnetic relay in which the respective contact portions are closed when the coil is in both a non-excited state and an excited state. .

[0002]

2. Description of the Related Art Conventionally, as an electromagnetic relay composed of two kinds of this type, there is one having a structure shown in FIGS. 4 (a) and 4 (b).

FIG. 4 (a) is a so-called a-contact type in which the contact portion is in a closed state when the coil is excited.
The coil 12 wound around the iron core 11, and the one end 13 on the iron core 11.
A yoke 13 to which a is fixed, and an armature that is rotatably supported by the other end 13b of the yoke 13 and is attracted to and released from the iron core 11.
14 and a contact portion 15 which is opened and closed by being driven by the armature 14 via the card 14a, and mounted on a base 16.

The contact portion 15 has contact points 52a, 53 facing each other.
When the coil 12 is not excited, the contacts 52a and 53a are in the open state.
Is excited, the armature 14 is attracted to the iron core 11 and the card
By pressing and driving one contact spring 52 via 14a, the contacts 52a, 53a are closed.

FIG. 4 (b) shows a so-called b-contact type in which the contact portion is closed when the coil is not excited.
It is constructed by using a contact portion 5 having a shape different from that of (a).

In other words, the contact portion 15 has the contact 54
The contact springs 54 and 55 are mounted on the base 16 so as to be orthogonal to each other with a and 55a provided at the tips respectively.
When the coil 12 is excited, the armature 14 is attracted to the iron core 11 and presses one of the contact springs 54 through the card 14a when the coil 12 is excited. By doing so, the contacts 54a, 55a are in the open state.

[0007]

In the above-mentioned conventional two-contact type electromagnetic relay of a-contact type and b-contact type, contact springs 52 and 53 which are parallel to each other are used in the a-contact type.
In the b-contact type, contact springs 54 and 55 that are orthogonal to each other are used, so that they are assembled with the contact portions 15 having different shapes. Therefore, the spring load characteristics of the contact springs are greatly different. Since the pitch of the contact terminals extending from the outside of the base 16 by extending each contact spring is also different, the operation stroke adjustment of the armature 14 that presses and drives the contact spring via the card 14a, the position adjustment jig of the contact spring As a result, the assembly equipment related to the contact spring such as the contact opening / closing operation confirmation jig cannot be shared, and the equipment investment becomes large accordingly.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an electromagnetic relay of two types, an a-contact type and a b-contact type, which can reduce equipment investment.

[0009]

In order to solve the above-mentioned problems, an electromagnetic relay of the present invention includes an iron core, a coil wound around the iron core, a yoke fixed to the iron core, and a joint. The armature is rotatably supported and is attracted and released from the iron core. The armature is provided with a contact portion that is driven by a contact spring to open and close. The coil is in both non-excited and excited states. In two types of electromagnetic relays in which each contact part is closed at the time of, contacts formed so as to be closed when the armature is attracted and open when released. In addition to sharing the part, one of the electromagnetic relays is a permanent magnet that is magnetized in the magnetic path direction in any of the iron core, yoke, or armature so that the armature is in an attracting state when the coil is not excited. A magnet is inserted, and the other electromagnetic relay operates when the coil is excited. As the pole is suction state, the iron core, the yoke, in any of the armature are the structure comprising not let interposed said permanent magnet.

[0010]

According to the electromagnetic relay of the present invention, there are two types of so-called b-contact type and a-contact type in which the respective contact portions are closed when the coil is in both the non-excited state and the excited state. On the other hand, one of the b-contact type electromagnetic relays has a permanent magnet magnetized in the magnetic path direction in any one of an iron core, a yoke, and an armature, so that the armature is not excited when the coil is not excited. In the suction state, the other a-contact type electromagnetic relay
Since the armature is in an attracting state when the coil is excited by not interposing the permanent magnet on any of the iron core, the yoke, and the armature, the two types of electromagnetic relays have two types of coil states: Due to the difference in excitation, the armature has the same working stroke and only the suction and release states are reversed, so when the armature is attracted it is released and released. By sharing the contact portion formed so as to be in the separated state when the contact springs are driven, the respective contact spring positions driven by the armature may be the same, and therefore,
Assembling equipment related to contact springs such as armature movement stroke adjustment, contact spring position adjustment jig, contact opening / closing operation confirmation jig, etc. can be shared, and equipment investment can be reduced accordingly.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 which is a so-called b-contact type in which a contact portion is in a closed state when a coil is not excited.

Reference numeral 1 denotes an iron core, which is made of a magnetic material and has a cylindrical shape with its head portion having a large diameter. Reference numeral 2 is a coil, which is wound around the iron core 1 through the coil frame 2a and has one flange portion of the coil frame 2a.
Both terminals are connected to a coil terminal 2c provided on 2b.

Reference numeral 3 is a yoke, which is made of a magnetic material and is formed in an L shape with one piece 3a and the other piece 3b.
A permanent magnet 31, which is magnetized in the magnetic path direction, that is, in the longitudinal direction of the one piece 3a to have N poles and S poles, is integrally provided in the middle portion of 3a by welding or the like. And for yoke 3, one piece 3a is the iron core
The other piece 3b is fixed to the end of the iron core 1 so as to be parallel to 1.

Reference numeral 4 denotes an armature, which is made of a magnetic material and is formed into an approximately L shape with one piece 4a and the other piece 4b bent at an obtuse angle, and the inside of the bend is formed at the end of one piece 3a of the yoke 3. One piece 4a is rotatably supported and is sucked and released by the head of the iron core 1.

Reference numeral 5 denotes a contact point, which is composed of contact springs 50 and 51 which are provided upright on the base 6 in parallel with each other with opposing contact points 50a and 51a provided at the tip ends thereof. The contact spring 50 is pressed and driven through the contacts 50a and 51a to open and close.

Next, the operation will be described. When the coil 2 is unexcited, as shown in Fig. 2 (a), the armature 4 is connected inside the bend so that a closed magnetic circuit is formed by the magnetic flux Φ ₁ of the permanent magnet 31 interposed in the yoke 3. One end 3a of iron 3 is rotatably supported by one end 3a, and one end 4a is sucked and held by the head of iron core 1. At this time, the other end 4b of armature 4 contacts through card 4c. The spring 50 is pressed and driven, and the contacts 5a and 51a of the contact portion 5 are closed.

Here, as shown in FIG. 2 (b), the coil 2
And the coil magnetic flux Φ ₂ is the magnetic flux Φ of the permanent magnet 31.
_{If 1} is canceled, the armature 4 has one piece 4a on the iron core.
1 is not attracted to the other side, and then the other piece 4b is pressed through the card 4c by the restoring force of the contact spring 50, so that the one piece 4a is released from the iron core 1 and the contact part
In the case of 5, the contacts 50a and 51a are in the open state, that is, this electromagnetic relay is of the b-contact type.

Next, a so-called a-contact type in which the contact portion is closed when the coil is excited will be described below with reference to FIG. This is different from the b-contact type in FIG. 2 only in that the yoke 3 does not have a permanent magnet 31 interposed, and the other structure is the same.

As shown in FIG. 3 (a), when the coil 2 is unexcited, the armature 4 has one piece 4a which is not attracted to the iron core 1. By pressing the other piece 4b through the card 4c, the one piece 4a is released from the iron core 1, and the contact portion 5
50a and 51a are open. Here, when the coil 2 is excited, as shown in FIG.
When 4a is attracted to the iron core 1, the other piece 4b presses the contact spring 50 through the card 4c, and the contact portion 5 contacts
50a and 51a are closed, that is, this electromagnetic relay is an a-contact type.

As described above, in the two types of electromagnetic relays of the a-contact type shown in FIG. 3 and the b-contact type shown in FIG. 2, the permanent magnet 31 is provided on the b-contact type yoke 3. 2 (a) and 3 (b) and FIG. 2 (b) for the difference between the non-excitation state and the excitation state of the coil 2.
As shown in Fig. 3 (a) and Fig. 3 (a) respectively, the armature 4 has the same operation stroke, and the states of suction and release are simply reversed. Therefore, when the armature 4 is attracted, it is closed. By sharing the contact part 5 formed so as to be opened when released, the positions of the contact springs 50 and 51 driven by the armature 4 may be the same, and Assembling equipment related to contact springs such as adjustment of operation stroke of armature 4, jigs for adjusting position of contact springs 50, 51, jigs for checking opening / closing operation of contacts 50a, 51a, etc. can be shared, and equipment investment can be reduced accordingly. Becomes

Incidentally, in the b-contact type of this embodiment, a permanent magnet is used.
Although 31 is provided on the yoke 3, it may be provided on any of the iron core 1, the yoke 3, and the armature 4 if it is in the middle of the magnetic path.

[0022]

Since the electromagnetic relay of the present invention is configured as described above, when the coil is in both the non-excited state and the excited state, the respective contact portions are closed, that is, the so-called b-contact type and a-contact. Although the two types of molds are constructed, the armature has the same operation stroke, and the suction and release states are simply reversed with respect to the difference between the non-excitation state and the excitation state of the coil. , The contact springs driven by the armature have the same position by sharing the contact portion formed so that the armature is closed when it is attracted and opened when it is released. Therefore, the operating stroke adjustment of the armature, the position adjustment jig of the contact spring,
Assembling equipment related to contact springs such as contact opening / closing operation confirmation jigs can be shared, and equipment investment can be reduced accordingly.

[Brief description of drawings]

FIG. 1 is a perspective view showing a b-contact type according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing an operating state of the above.

FIG. 3 is a partial cross-sectional view showing an operating state of the above-mentioned a-contact type.

FIG. 4 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 Iron core 2 Coil 3 Yoke 4 Armature 5 Contact point 50 Contact spring 31 Permanent magnet

Claims (1)

[Claims] 1. An iron core, a coil wound around the iron core, a yoke fixed to the iron core, and an armature rotatably supported by the yoke and sucked and released from the iron core. And a contact part which is opened and closed by driving a contact spring by an armature, and in which the respective contact parts are closed when the coil is in both a non-excitation state and an excitation state , The shared contact part is formed so that the armature is closed when attracted and released when released, and one electromagnetic relay is connected when the coil is not excited. A permanent magnet magnetized in the magnetic path direction is interposed in any one of the iron core, the yoke, and the armature so that the pole piece is in an attracting state, and the other electromagnetic relay is provided when the coil is excited. In order for the armature to be in a suction state, the iron core, the yoke, the armature Electromagnetic relay which is not let interposed a permanent magnet.