JP2001143594A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic relay that facilitates adjustment of the sensitivity of connection and disconnection between both contacts. SOLUTION: An electromagnetic relay comprises a relay iron 1 forming a magnetic poles 1a, 1b by winding a coil 3, pole contact member 4 pivoted by being attracted to and repulsed from the magnetic poles 1a, 1b of the relay iron according to the excited state of the coil 3, stationary contact plate 11 with a stationary contact 11b, moveable spring 9 with a moveable contact 9b facing the stationary contact 11b, and guide 12 linked to the pole contact member 4 for displacing the moveable spring 9 to contact or separate the moveable contact 9b with the stationary contact 11b according to pivoting motion of the pole contact member 4. The moveable spring 9 is resiliently deformed according to the direction of displacement so as to adjust the facing distance between the two contacts 9b, 11b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay in which an armature rotates so that both contacts abut and separate.

[0002]

2. Description of the Related Art FIG.
And those shown in FIG. This is a yoke C provided with magnetic pole portions C1 and C2 at both ends by winding a coil B with a winding space partitioned by a coil bobbin A, and both magnetic poles of the yoke C according to the excitation state of the coil B. A pair of armatures D1 and D2 that are rotated by being attracted and separated by the portions C1 and C2, a fixed contact plate E provided with a fixed contact E1, a movable spring F provided with a movable contact F1 opposed to the fixed contact E1, and an armature; D1, D2
And a card G for displacing the movable spring F such that the movable contact F1 is brought into contact with and separated from the fixed contact E1 in accordance with the turning operation of the armatures D1 and D2.

The yoke C forms a coil block CC together with the coil bobbin A and the coil B. The two armatures D1 and D2 sandwich the permanent magnet H therebetween, and are integrally formed with the permanent magnet H by a molding material to form the armature block DD. The molded portion J formed by the integral molding has a support portion J1 rotatably supported by a body K on which the respective portions such as the armature block DD and the coil block CC are provided, and one end thereof is connected to the movable spring F. Lever J connected to the other end of card G
2 is extended.

The lever J2 is provided with two magnetic pole portions C of the yoke C.
In the state where gaps GG are respectively formed between C1 and C2,
It is connected to a yoke C via an adjustment spring L so as to be rotatably supported. The gap GG between the magnetic pole portions C1 and C2 of the yoke C and the armatures D1 and D2 is adjusted by appropriately changing the shape of the adjustment spring L. In this way, by adjusting the gap GG, it is possible to adjust the sensing voltage of the contact / separation operation of the contacts E1 and F1, and it is possible to adjust the sensitivity itself of the contact / separation operation of the contacts E1 and F1. ing.

When the coil B is excited by supplying a current in a predetermined direction, one end D11 of the armature D1 is connected to one end C1 of the yoke C so as to form a closed magnetic circuit.
At the same time, the other end D22 of the other armature D2 is attracted by the other end magnetic pole C2 of the yoke C, and the armature block DD rotates clockwise in FIG. as a result,
Card G connected to lever J2 of armature block DD
Is driven toward the movable spring F, the movable spring F connected to the driven card G is displaced toward the fixed contact plate E, and the movable contact F1 of the movable spring F is moved to the fixed contact plate E.
Abuts on the fixed contact E1. This state is maintained when the excitation of the coil B is stopped.

In this state, when a current flows in a direction opposite to the above-mentioned direction to excite the coil B, the other end D12 of the armature D1 is connected to the other end of the yoke C so as to form a closed magnetic circuit. The other end of the other armature D2 is attracted by the portion C2
21 is attracted to the magnetic pole portion C1 at one end of the yoke C, and the armature block DD rotates counterclockwise in FIG. As a result, the card G connected to the lever J2 of the armature block DD is driven in a direction away from the movable spring F, and the movable spring F connected to the driven card G is driven.
Is displaced away from the fixed contact plate E, and the movable contact F1 of the movable spring F is separated from the fixed contact E1 of the fixed contact plate E. This state is maintained when the excitation of the coil B is stopped.

[0007]

In the above-described conventional electromagnetic relay, the gap GG is formed at two places between the armatures D1 and D2 and the magnetic pole portions C1 and C2 of the yoke C. Therefore, at least one of the two gaps GG remains in a state in which the sensitivity of the contact opening / closing operation of the two contacts E1 and F1 is adjusted, and the variation in the suction force is increased.
It has been difficult to adjust the sensitivity of the contact opening operation of the two contacts E1 and F1.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide an electromagnetic relay which can easily adjust the sensitivity of the contact opening operation of the two contacts.

[0009]

According to another aspect of the present invention, there is provided an electromagnetic relay, comprising: a yoke having a magnetic pole formed by winding a coil; and a yoke according to an excitation state of the coil. Armature that is rotated by being attracted to and separated from the magnetic pole portion of the armature, a fixed contact plate provided with a fixed contact, a movable spring provided with a movable contact opposed to the fixed contact, and a rotation of the armature connected to the armature. And a card for displacing the movable spring so that the movable contact abuts and separates from the fixed contact in response to the moving operation, wherein the movable spring is elastically deformed along the direction of the displacement. The distance between them is adjustable.

According to a second aspect of the present invention, there is provided the electromagnetic relay according to the first aspect, further comprising a pressing portion for pressing the movable spring so as to elastically deform the movable spring along a direction of displacement.

According to a third aspect of the present invention, in the electromagnetic relay of the second aspect, a movable terminal for attaching the movable spring is provided, and the pressing portion is provided on the movable terminal.

According to a fourth aspect of the present invention, in the electromagnetic relay according to the second or third aspect, the movable spring locally reduces a spring force of a portion pressed by the pressing portion. Configuration.

According to a fifth aspect of the present invention, in the electromagnetic relay according to any one of the second to fourth aspects, the movable spring is configured to form a portion pressed by the pressing portion along the displacement direction. It is configured to be deformable.

According to a sixth aspect of the present invention, in the electromagnetic relay according to the fifth aspect, the fixed contact plate has elasticity, a base end portion is attached to a fixed terminal, and the fixed contact is provided at a distal end portion. The fixed terminal has a configuration in which a contact portion that contacts the fixed contact plate and the front end side when the two contacts are in contact with each other is extended.

According to a seventh aspect of the present invention, in the electromagnetic relay according to the sixth aspect, the fixed contact plate is configured to obtain a preliminary pressure of the two contacts.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes a yoke, which is formed of a magnetic metal material into a substantially U-shape as shown in FIG.
As will be described later, both end portions serving as the magnetic pole portions 1a and 1b are wide. Reference numeral 2 denotes a coil bobbin, which is formed of a molding material such as plastic and has a substantially cylindrical shape having flanges 2a at both ends of the winding drum as shown in FIG. 2, and the coil 3 is wound around the winding drum. You. The yoke 1 penetrates through the winding body of the coil bobbin 2, and both ends of the yoke 1 protrude from the coil bobbin 2. Thus, the coil 3 is wound around the yoke 1 via the coil bobbin 2, and as a result,
Wide ends of the yoke 1 are magnetic pole portions 1a and 1b. The coil 3 may be wound directly on the yoke 1 in a state where the winding space is partitioned by the coil bobbin 2.

Reference numeral 4 denotes an armature, which is formed in a plate shape from a magnetic metal material, and has an insertion portion 4a which is inserted into an insertion hole 12a of a card 12 described later and protrudes from one end in the longitudinal direction thereof.
A square hole 4b is formed in the center. This armature 4 is
Between both ends in the longitudinal direction and the square hole 4b, a locking portion 4c which is inserted and locked into a locking hole 6a of the hinge spring 6 described later is projected.

Reference numeral 5 denotes an auxiliary yoke, which is formed of a magnetic metal material in a plate shape, and has square holes 5a, 5a between its longitudinal ends and a central portion. On both sides, a locking portion 5b that is inserted and locked into a locking square hole 6b of a hinge spring 6 described later protrudes. The auxiliary yoke 5 has an insertion portion 5c to be inserted into a base 12 to be described later extending from one side. When the insertion portion 5c is inserted into the base 12, both ends in the longitudinal direction are connected to the yoke 1. Contacts the inside of the magnetic poles at both ends.

Reference numeral 6 denotes a hinge spring made of a thin metal material.
It has a central piece and both opposing pieces and is formed in a substantially U-shape. The central piece has an extended portion extending from both sides thereof, and a locking hole 6a which is inserted and locked into the locking portion 4c of the armature 4 is provided at the wide end of each of the extended portions. I have. The two opposing pieces are provided at their distal ends with locking square holes 6b that are inserted and locked into the locking portions 5b of the auxiliary yoke 5, and extending portions are extended from both sides. To face each other,
A support 6c for supporting the four corners of the permanent magnet 7 is provided.

The hinge spring 6 has the locking holes 6a with the four corners of the permanent magnet 7 held between the center of the armature 4 and the center of the auxiliary yoke 5 supported by the support 6c. The locking square hole 6b is inserted and locked into the locking portion 4a of the armature 4 and the locking portion 5b of the auxiliary yoke 5, respectively, so that the armature 4, the auxiliary yoke 5, and the permanent magnet 7 are The armature block 20 is configured. The hinge spring 6 rotatably supports the armature 4 such that both ends thereof are attracted to and separated from the magnetic poles 1 a and 1 b at both ends of the yoke 1 with the central piece as a rotation fulcrum.

Reference numeral 8 denotes a movable terminal, which is formed of a metal material in a plate shape, and has a movable spring 9 which will be described later at its longitudinal end.
The base end is crimped and fixed. This movable terminal 8
An arm-shaped pressing portion 8a whose front end can be pressed from one side of the front end in the longitudinal direction so as to be elastically deformed along the displacement direction thereof from one side of the front end in the longitudinal direction so as to be located near the movable spring 9 is provided. . The pressing portion 8a has a substantially bowed shape with the intermediate portion kept away from the movable spring 9, and the movable spring 9
The pressing surface of the tip for pressing is a curved surface.

Reference numeral 9 denotes a movable spring, which is formed in a substantially rectangular thin plate shape from a metal material, and its base end is fixed by caulking to the distal end of the movable terminal 8, and together with the movable terminal 8, a movable terminal block is provided. 30. This movable spring 9
Is provided with an insertion portion 9a to be inserted into an insertion hole 12b of the card 12, which will be described later, and the movable contact 9b is caulked and fixed to the front end slightly closer to the center than the front end.

One side of the movable spring 9 near the movable contact 9b is a pressed portion 9c which can be pressed by the pressing portion 8a of the movable terminal 8, and the pressed portion 9c and the movable contact 9
b, a slit-shaped cutout 9d is provided. Due to the cutout 9d, the pressed portion 9c locally weakens its spring force, and when it is bent so as to be raised, it is plastically deformed along the displacement direction of the movable spring 9. ing. When the movable terminal block 30 is disposed on the body 13 to be described later, the pressed portion 9c of the movable spring 9 is located at the outermost position together with the pressed portion 8a of the movable terminal 8 as shown in FIG. I have.

Reference numeral 10 denotes a fixed terminal, which is formed in a plate shape from a metal material, and a base end of a fixed contact plate 11, which will be described later, is fixed by caulking at a longitudinal end portion thereof. The fixed terminal 10 has a longitudinally extending distal end portion such that the distal end portion is located near the fixed contact 11 b in the fixed contact plate 11 in the same manner as the movable terminal 8 extends the arm-shaped pressing portion 8 a. From one side, a contact portion 10 whose tip contacts the fixed contact plate 11
a is extended. The contact portion 10a has a shape similar to that of the pressing portion 8a, that is, has a substantially arcuate arm shape with the intermediate portion kept away from the fixed contact plate 11, and contacts the fixed contact plate 11 near the fixed contact 11b. The contact surface of the leading end is curved.

The fixed terminal 10 has the same shape as the movable terminal 8 except that the base end is bent, and has compatibility with the movable terminal 8 before being bent. Therefore, parts can be shared.

Reference numeral 11 denotes a fixed contact plate, which is formed of a metal material and has a resilient, substantially rectangular thin plate shape, and a base end portion of which is fixed by caulking to a tip end portion of the fixed terminal 10 and fixed. Together with 10, a fixed terminal block 40 is formed. The fixed contact plate 11 has a pressed portion 11a which is pressed from the inner surface of the body 13 to be described later as a reaction of the spring force of the fixed contact plate 11 and extends from one side, and the fixed contact 11b is caulked and fixed to the tip. This fixed contact plate 11
When the pressed portion 11a is pressed from the inner surface of the body 13, a spring load is applied along the direction of displacement of the movable spring 9, and a preliminary pressure is applied to both the contacts 9b and 11b.

Reference numeral 12 denotes a card which is formed in a rectangular plate shape from a nonconductive material such as plastic, for example, and has an insertion hole 12a which is inserted into the insertion portion 4c of the armature 4 at one longitudinal end thereof. And an insertion hole 12b to be inserted into the insertion portion 9a of the movable spring 9 at the other end. As described above, the card 12 has the insertion portion 4c of the armature 4 inserted into the insertion hole 12a and the insertion hole 1a.
By inserting the insertion portion 9a of the movable spring 9 into 2b,
The armature 4 and the movable spring 9 are connected in series.

Reference numeral 13 denotes a body, which is formed of, for example, plastic or the like and has a substantially box shape with one opening, on which the above-described components are disposed. In the installed state, the movable terminal 8 and the fixed terminal 10 protrude outward, and the coil terminal 14 penetrated and fixed to the body 13 also protrudes outside.
This coil terminal 14 is connected to the coil 3.

Next, the adjustment of the sensitivity of the contact opening / closing operation of the contacts 9b and 11b will be described. To increase the sensitivity,
By bending the arm-shaped pressing portion 8a of the movable terminal 8 toward the movable spring 9 side from the current state and plastically deforming the same,
The pressing force of the pressing portion 8a against the pressed portion 9c is increased, and the movable spring 9 is moved along the displacement direction of the fixed contact plate 11a.
In this case, the distance between the contact points 9b and 11b may be reduced by elastically deforming the contact points. At this time, when the pressed portion 9c of the movable spring 9 is plastically deformed toward the pressing portion 8a along the displacement direction so as to raise, the pressing force of the pressing portion 8a on the pressed portion 9c of the movable spring 9 becomes: Since the strength of the movable spring 9 becomes stronger and the amount of elastic deformation of the movable spring 9 as a whole increases, the sensitivity can be further increased.

On the other hand, when the sensitivity is to be lowered, the arm-shaped pressing portion 8a of the movable terminal 8 is bent toward the opposite side of the movable spring 9 from the current state and plastically deformed. What is necessary is to weaken the pressing force of the pressing portion 8a against the pressed portion 9c, and make the opposing distance between the two contact points 9b and 11b longer. At this time, when the pressed portion 9c of the movable spring 9 is plastically deformed in a direction away from the pressing portion 8a along the displacement direction so as to raise, the pressed portion 9c of the movable spring 9 is pressed.
The pressing force of the pressing portion 8a is weaker,
Since the amount of elastic deformation of the movable spring 9 as a whole becomes smaller, the sensitivity can be further reduced.

Next, the operation will be described. When a current flows in a preset direction to excite the coil 3, the other end of the armature 4 is attracted to the other end magnetic pole portion 1 b of the yoke 1 to form a closed magnetic path, and With the central piece as the pivot point,
In FIG. 1, the armature 4 rotates clockwise. As a result, the card 12 connected to the armature 4 is driven toward the movable spring 9, and the movable spring 9 connected to the driven card 12 is displaced toward the fixed contact plate 11,
The movable contact 9b of the movable spring 9 contacts the fixed contact 11b of the fixed contact plate 11, and the state shown in FIG. 12 is obtained. This state is maintained when the excitation of the coil 3 is stopped.

In this state, when a current flows in a direction opposite to the above-mentioned direction and the coil 3 is excited, the armature 4 is pivoted around the center piece of the hinge spring 6 so as to form a closed magnetic path.
1 is attracted to one end magnetic pole portion 1a of the yoke 1, and FIG.
At 2, the armature 4 rotates counterclockwise. As a result, the card 12 connected to the armature 4 is driven in a direction away from the movable spring 9, and the movable spring 9 connected to the driven card 12 is separated from the fixed contact plate 11. As a result, the movable contact 9b of the movable spring 9 is separated from the fixed contact 11b of the fixed contact plate 11. Coil 3
When this is stopped, this state is maintained.

In such an electromagnetic relay, the movable spring 9
When the distance between the contact points 9b and 11b is adjusted to be shorter by elastically deforming the contact points 9b and 11b along the displacement direction, the sensitivity of the contact / separation operation of the contact points 9b and 11b increases. If the adjustment for increasing the facing distance between the two contacts 9b and 11b is made longer, the sensitivity of the contact and separation operation of the two contacts 9b and 11b becomes lower. Therefore, the sensitivity of the contact and separation operation of the two contacts 9b and 11b is adjusted. It is possible. As described above, by elastically deforming the movable spring 9 along its displacement direction,
Since the sensitivity of the contact / separation operation of the two contacts 9b and 11b is adjusted, there is no need to provide a gap for adjusting the sensitivity between the magnetic pole portions 1a and 1b of the yoke 1 and the armature 4. The variation of the suction force does not occur, and the sensitivity adjustment of the contact opening operation of the two contacts 9b and 11b is facilitated.

Further, since the movable spring 9 is elastically deformed in the direction of displacement by the pressing portion 8a, the amount of elastic deformation can be adjusted by increasing or decreasing the pressing force by the pressing portion 8a. Sensitivity adjustment of the contact / separation operation of the contacts 9a and 11a is facilitated.

Further, since the pressing portion 8a is provided on the movable terminal 8 itself, it is necessary to pay special attention so that mutual interference does not occur due to contact with the movable terminal 8 or the like. Need not be provided, and assembly is facilitated.

Further, since the movable spring 9 locally weakens the spring force of the pressed portion 9c, the movable spring 9 as a whole can be slightly elastically deformed along the displacement direction, and the two contact points 9b , 11b can be adjusted with high accuracy.

Further, since the pressed portion 9c of the movable spring 9 is plastically deformed in the direction of displacement, the state of pressing by the pressing portion 8a can be adjusted, so that fine adjustment of elastic deformation in the direction of displacement becomes possible. In addition, the sensitivity of the contact / separation operation of the contacts 9b and 11b can be adjusted with high accuracy.

Further, when the two contacts 9b and 11b are in contact with each other, current flows not only in the fixed contact plate 11 but also in the contact portion 10a extending from the fixed terminal 10, so that the current flowing through the fixed contact plate 11 is reduced. Heat generation can be suppressed. In addition, the contact portion 10a is not in contact with the base end of the fixed contact plate 11, but is in contact with the vicinity of the fixed contact 11b, and extends over substantially the entire length of the fixed contact plate 11 in the longitudinal direction. And a parallel circuit, the effect of suppressing the heat generation of the fixed contact plate 11 can be enhanced.

The contact portion 1 extending from the fixed terminal 10
When the fixed contact plate 11 is elastically deformed along the direction of displacement of the movable spring 9 by plastically deforming the fixed contact plate 11 along the direction of displacement of the movable spring 9 and shifting the contact position, The opposing distance can be adjusted, and the sensitivity of the contact / separation operation of the two contacts 9b and 11b can be adjusted.

Further, since the fixed contact plate 11 comes into contact with the contact portion 10a of the fixed terminal 10 from the side opposite to the movable contact 9b at the time of contact, the contact bounce can be reduced.

The fixed contact plate 11 has two contacts 9b, 1
1b, the two contact points 9b,
With the contact of 11b, contact pressure can be obtained.

When the movable terminal block 30 is disposed on the body 13, the pressed portion 9c of the movable spring 9 and the pressed portion 8a of the movable terminal 8 are located at the outermost positions as shown in FIG. Therefore, the deformation operation for adjusting the sensitivity of the contact opening operation of the contact points 9b and 11b is facilitated.

Further, since the pressing portion 8a of the movable terminal 8 and the contact portion 10a of the fixed terminal 10 are both in the form of a substantially arcuate arm, plastic deformation along the displacement direction of the movable spring 9 is facilitated. .

The pressing surface of the pressing portion 8a of the movable terminal 8 and the contact surface of the contact portion 10a of the fixed terminal 10 are both
Due to the curved surface, the movable spring 9 and the fixed contact plate 10
Are less likely to be worn, and metal powder due to wear is less likely to be generated. Therefore, the metal powder hardly adheres to both of the contacts 9b and 11b, and a defective contact is less likely to occur.

In the present embodiment, the sensitivity of the contact opening operation of the contact points 9b and 11b is adjusted by plastically deforming the pressing portion 8a of the movable terminal 8 and the pressed portion 9c of the movable spring 9. However, the sensitivity can be adjusted by plastic deformation of only one of them.

In the present embodiment, the fixed contact plate 11
Has elasticity, but even in the case of not having elasticity, the movable spring 9 is elastically deformed along its displacement direction, thereby adjusting the sensitivity of the contact / separation operation of the contact points 9b and 11b. can do.

In this embodiment, the movable spring 9 is provided with the cutout 9d to locally reduce the spring force of the pressed portion 9c. However, for example, fine adjustment of the sensitivity is not required. At this time, as shown in FIG. 14, a movable spring 9 having no cutout 9d may be used.

In this embodiment, the movable spring 9 is provided with a slit-shaped cutout 9d so that the pressed portion 9c can be plastically deformed so as to be raised. For example, fine adjustment of sensitivity is not required. In such a case, as shown in FIG. 15, the movable spring 9 in which the cutout 9d is simply notched may be used.

The present embodiment includes a permanent magnet 7.
It is a so-called polarized relay, but does not include the permanent magnet 7.
The same effect can be obtained with a so-called non-polar relay.

[0050]

According to the first aspect of the present invention, when the movable spring is elastically deformed in the direction of its displacement to make the facing distance between the two contacts shorter, the contact and separation of the two contacts can be improved. If the sensitivity of the operation increases and conversely, if the adjustment is made to make the facing distance between the two contacts longer, the sensitivity of the contact and separation operation of both contacts will decrease, so the sensitivity adjustment of the contact and separation operation of both contacts Is possible. As described above, the sensitivity of the contact / separation operation of the two contacts is adjusted by elastically deforming the movable spring along the direction of displacement, so that the sensitivity is adjusted between the magnetic pole portion of the yoke and the armature. It is not necessary to provide a gap for use, and there is no variation in the suction force, and the sensitivity adjustment of the contact / separation operation of the two contacts is facilitated.

According to the electromagnetic relay of the second aspect, in addition to the effect of the electromagnetic relay of the first aspect, since the movable portion is elastically deformed along the direction of displacement by the pressing portion, the pressing force by the pressing portion is moderated. By doing so, the amount of elastic deformation can be adjusted, and the sensitivity of the contact / separation operation of the two contacts can be easily adjusted.

In the electromagnetic relay according to the third aspect, in addition to the effect of the electromagnetic relay according to the second aspect, since the pressing portion is provided on the movable terminal itself, mutual interference may occur due to contact with the movable terminal. It is not necessary to provide the pressing portion with particular care so as not to cause the assembling, which facilitates the assembly.

According to the electromagnetic relay of the fourth aspect, in addition to the effect of the electromagnetic relay of the second or third aspect, the movable spring locally applies the spring force of the portion pressed by the pressing portion. Therefore, it is possible to perform minute elastic deformation along the direction of displacement, and it is possible to accurately adjust the sensitivity of the contact opening operation of the two contacts.

According to a fifth aspect of the present invention, in addition to the effect of the electromagnetic relay according to any one of the second to fourth aspects, the portion pressed by the pressing portion is plastically deformed in the direction of displacement. Accordingly, the state of pressing by the pressing portion can be adjusted, so that fine adjustment of elastic deformation along the direction of displacement can be performed, and the sensitivity adjustment of the contact / separation operation of the two contacts can be performed with high accuracy.

According to the electromagnetic relay of the present invention, in addition to the effect of the electromagnetic relay of any one of the first to fifth aspects, when the two contacts come into contact, not only the fixed contact plate but also the fixed terminal is provided. Since the current also flows through the extended contact portion, the current flowing through the fixed contact plate can be reduced, and heat generation can be suppressed.

In the electromagnetic relay according to the seventh aspect, in addition to the effect of the electromagnetic relay according to the sixth aspect, the fixed contact plate obtains the preliminary pressure of the two contacts, so that the fixed contact plate is brought into contact with both the contacts. Contact pressure can be obtained.

[0057]

[Brief description of the drawings]

FIG. 1 is a side view showing that an embodiment of the present invention is in a contact separated state.

FIG. 2 is a perspective view of the same.

FIG. 3 is an exploded perspective view of the armature block according to the first embodiment.

FIG. 4 is a perspective view of the armature block according to the first embodiment;

FIG. 5 is a perspective view of a movable terminal block according to the third embodiment.

FIG. 6 is a perspective view of the fixed terminal block according to the third embodiment.

FIG. 7 is a perspective view of the card.

FIG. 8 is a perspective view of the yoke.

FIG. 9 is a front view of the movable terminal block.

FIG. 10 is a side view of the same movable terminal block.

FIG. 11 is a sectional view taken along line XX of FIG. 1;

FIG. 12 is a side view showing that the above is in a contact state.

FIG. 13 is a sectional view taken along line YY of FIG.

FIG. 14 is a front view of a movable terminal block having a movable spring without a cutout.

FIG. 15 is a front view of a movable terminal block having a movable spring provided with a cut-out portion.

FIG. 16 is a perspective view of a conventional example.

FIG. 17 is a front view showing the same operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Yoke 1a Magnetic pole part 1b Magnetic pole part 3 Coil 4 Armature 8 Movable terminal 8a Pressing part 9 Movable spring 9b Movable contact 10 Fixed terminal 10a Contact part 11 Fixed contact plate 11b Fixed contact 12 Card

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[Procedure amendment]

[Submission Date] February 18, 2000 (2000.2.1
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction contents]

Reference numeral 5 denotes an auxiliary yoke, which is formed of a magnetic metal material in a plate shape, and has square holes 5a, 5a between its longitudinal ends and a central portion. On both sides, a locking portion 5b that is inserted and locked into a locking square hole 6b of a hinge spring 6 described later protrudes. The auxiliary yoke 5 has an insertion portion 5c to be inserted into the body 13 to be described later extending from one side, and when the insertion portion 5c is inserted into the body 13 , both ends in the longitudinal direction are yoke 1 Contacts the inside of the magnetic poles at both ends.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction contents]

Further, since the movable spring 9 is elastically deformed in the direction of displacement by the pressing portion 8a, the amount of elastic deformation can be adjusted by increasing or decreasing the pressing force by the pressing portion 8a. Sensitivity adjustment of the contact opening operation of the contacts 9 b and 11 b is facilitated.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masafumi Nakagawa 1048 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (7)

[Claims] 1. A yoke having a magnetic pole portion formed by winding a coil, an armature rotatably attracted to and separated from a magnetic pole portion of the yoke according to an excitation state of the coil, and a fixed contact having a fixed contact A plate, a movable spring having a movable contact opposed to the fixed contact,
A card that is connected to the armature and displaces the movable spring so that the movable contact abuts and separates from the fixed contact in accordance with the turning operation of the armature. An electromagnetic relay characterized in that an opposing distance between the two contacts can be adjusted by elastically deforming the contact. 2. The electromagnetic relay according to claim 1, further comprising a pressing portion that presses the movable spring so as to elastically deform the movable spring along a direction in which the movable spring is displaced. 3. An electromagnetic relay according to claim 2, wherein a movable terminal for attaching said movable spring is provided, and said pressing portion is provided on said movable terminal. 4. The electromagnetic relay according to claim 2, wherein the movable spring locally reduces a spring force of a portion pressed by the pressing portion. 5. The electromagnetic relay according to claim 2, wherein the movable spring is capable of plastically deforming a portion pressed by the pressing portion along the displacement direction. . 6. The fixed contact plate has elasticity, a base end portion of which is attached to a fixed terminal, and the fixed contact is provided at a distal end portion, wherein the fixed terminal is in contact with the two contacts. The electromagnetic relay according to any one of claims 1 to 5, wherein a contact portion that contacts the fixed contact plate and a tip side is extended. 7. The electromagnetic relay according to claim 6, wherein said fixed contact plate is configured to obtain a preliminary pressure of said two contacts.