JPH10326549A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic relay that can be made small by arranging a common terminal on the electromagnet part side and highly insulating the space between an electromagnet part and a contact part. SOLUTION: An electromagnetic relay has a body 1, an electromagnet part 2 in which an armature 24 rotatably supported in a yoke 23 joined to one end of an iron core around which a coil is wound is attracted to and released from the other end, a contact part 3 having a fixed contact and a moving contact fixed to a fixed terminal and a common terminal through a fixed terminal plate and a moving contact spring 31, a plate-shaped card for switching the contact part, and an insulating wall 12 for insulating the space between the electromagnet part 2 and the contact part. In the insulating wall formed in almost an L shape with one piece 12a and the other piece 12b projecting from the one piece 12a, the other piece 12b is arranged between the electromagnet part 2 and the contact part, and the common terminal is positioned on the one piece 12a side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay for transmitting a driving force of an armature to a movable contact spring via a card to drive a contact portion to open and close.

[0002]

2. Description of the Related Art Conventionally, as this type of electromagnetic relay, FIG.
1 and those shown in FIG. In this device, a body A having a bottom portion A1 and an armature B4 rotatably supported by a yoke B3 coupled to one end portion B21 of an iron core B2 around which a coil B1 is wound are provided in addition to the iron core B2. An electromagnet portion B attracted and released to the end portion B22, and a fixed contact C1 and a movable contact C2 connected to the fixed terminal C11 and the common terminal C21 via a fixed terminal plate C12 and a movable contact spring C22, respectively. A contact portion C in which the movable contact C2 contacts and separates from the fixed contact C1,
A plate-shaped card D that contacts and contacts the armature B4 and the movable contact spring C22 to open and close the contact portion C, and an insulating wall protruding from the bottom A1 of the body A to insulate the electromagnet portion B and the contact portion C from each other. A2.

However, in this case, the insulating wall A2 is formed not in the L-shape but in the I-shape, and is located between the electromagnet portion B and the contact portion C.

[0004] More specifically, the common terminal C21 has a movable contact spring C22 which is bent at a bent portion in two steps, and is disposed on the electromagnet portion B side with respect to the fixed terminal C11. Therefore, when using a plurality of printed circuit boards,
The common terminals C21 are arranged on a straight line of the printed circuit board with a distance between the common terminals C21 and the fixed terminals C11. And
The user uses the straight line as a common wiring line,
There is an advantage that printed wiring can be simplified.

[0005]

In the above-described conventional electromagnetic relay, the insulating wall A2 is protruded from the body A to insulate the electromagnet portion B and the contact portion C.

However, since the common terminal C21 is disposed on the side of the electromagnet portion B and the insulating wall A2 is formed in an I-shape, when the size is reduced, the armature B4 of the electromagnet portion B, the common terminal C21 and the common terminal The distance from the bent portion of the movable contact spring C22 connected to the common terminal C21 is reduced, and the electromagnet portion B
The present invention, in which the insulation between the contact point C and the contact part C is deteriorated and the miniaturization is limited, has been made in view of the above problem, and the purpose is to dispose the common terminal on the electromagnet part side. An object of the present invention is to provide an electromagnetic relay that can be downsized by increasing the insulation between the electromagnet section and the contact section in the state in which the electromagnet section is in contact with the electromagnetic relay section.

[0007]

According to a first aspect of the present invention, there is provided a body having a bottom portion and a yoke connected to one end of an iron core around which a coil is wound. An electromagnet section in which a rotatably supported armature is attracted and released to the other end of the iron core, and fixed and movable contacts connected to fixed and common terminals via fixed terminal plates and movable contact springs, respectively. A contact portion having a contact, wherein a movable contact comes into contact with and separates from a fixed contact; a plate-shaped card which abuts on an armature and a movable contact spring to open and close the contact portion; and is provided protruding from the bottom of the body. An electromagnetic relay comprising an electromagnet portion and an insulating wall for insulating between the contact portions, wherein the common terminal is disposed on the electromagnet portion side with respect to the fixed terminal. The electromagnetic relay has one piece and another piece protruding from the one piece. The other part of the insulating wall formed in the shape of a letter Together provided between the magnet portion and the contact portion, the common terminal are a configuration disposed positioned to one side.

According to a second aspect of the present invention, in the first aspect, the movable contacts connected to the common terminal via the movable contact spring are integrally formed to form a common terminal block. Along with the common terminal block mounted in the protruding direction of the other piece and the electromagnet portion mounted in the direction opposite to the protruding direction, the other side and the one side of the one piece with respect to the other piece, respectively. It is arranged.

According to a third aspect of the present invention, in the first or second aspect, the contact portion is such that the fixed contact is provided on an electromagnet portion side with respect to the movable contact. Another insulating wall that insulates between the fixed terminal plate and the movable contact spring is provided on the body at a position corresponding to a cross portion where each crosses.

According to a fourth aspect of the present invention, in the one of the first to third aspects, the card has an engaging projection which is engaged with an engaging hole provided in the movable contact spring at one end. And the insulating wall is cut away in a direction opposite to the projecting direction, and an engagement groove for engaging with the card is provided in the other piece.

According to a fifth aspect of the present invention, in the case of the fourth aspect, the case fitted to the body has a regulating rib for regulating the displacement of the card in the projecting direction at a position corresponding to the engagement groove. The configuration is provided in.

[0012]

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 body, which is made of an insulating resin and has a substantially rectangular parallelepiped bottom 11 and a piece 12a and another piece 12b protruding from the piece 12a and formed in a substantially L-shape. An insulating wall 12 is provided, and the insulating wall 12 is integrally formed with the bottom portion 11 and protrudes from the bottom portion 11. here,
An engagement groove 12c is provided in the other piece 12b of the insulating wall 12,
The other piece 12b is cut out in a direction opposite to the projecting direction. Further, as shown in FIG. 8, another insulating wall 13 protrudes from the bottom 11 of the body 1.

Reference numeral 2 denotes an electromagnet section, which includes an iron core 21 and a coil 22.
, A yoke 23, and an armature 24. The iron core 21 is formed in a rod shape from a magnetic material.
a and the other end 21b, the other end 21b is formed in a flange shape, and is inserted into the shaft hole 22a of the coil frame.

The coil 22 is wound around a shaft hole 22a of the coil frame, that is, around the iron core 21, with a copper wire covered with an insulator, and its terminal is connected to the coil terminal 22b. The yoke 23 is made of a magnetic material.
And the other piece 23b is formed in a substantially L-shape, and the one piece 23a is caulked to one end 21a of the iron core 21,
The other piece 23b is juxtaposed along the axial hole 22a of the coil frame.

The armature 24 is made of a magnetic material.
a and the other piece 24b are bent at an obtuse angle into a substantially L-shaped long plate shape, and are pressed by the hinge spring 24c to rotate to the end of the other piece 23b of the yoke 23. Freely supported, the piece 24a is sucked and released by the other end 21b of the iron core 21.

Reference numeral 3 denotes a contact portion, which comprises a movable contact spring 31 and two fixed terminal plates. The fixed terminal plate is formed by a normally closed fixed terminal plate 32 and a normally open fixed terminal plate 33. You. The movable contact spring 31 is formed in a plate shape from an elastic copper alloy, and is made of a silver alloy.
a and both normally movable contacts 31b formed by the movable contact 31b
a and 31b are fixed to one end, and are formed in two steps by a first bent part 31c and a second bent part 31d, and the other end is a common terminal 31e. That is, the normally closed movable contact 31a and the normally open movable contact 31b are connected to the common terminal 31e via the movable contact spring 31. In addition, the locking hole 31
f is provided on one end side.

The normally closed fixed terminal plate 32 is formed of a conductive material such as copper or a copper alloy in the shape of a long plate, and has a normally closed fixed contact 32a made of a silver alloy at one end so as to face the normally closed movable contact 31a. The other end is a normally closed fixed terminal 32b, a so-called NC terminal. That is, the normally closed fixed contact 32
a is connected to the normally closed fixed terminal 32 b via the normally closed fixed terminal plate 32.

The normally-open fixed terminal plate 33 is formed in a long plate shape using a conductive material such as copper or a copper alloy, and has a normally-open fixed contact 33a made of a silver alloy at one end and a normally-open movable contact 31b.
The other end 21b is fixed to the normally open fixed terminal 3
3b, a so-called NO terminal. That is, the normally-open fixed contact 33a is connected to the normally-open fixed terminal 33b via the normally-open fixed terminal plate 33. And the normally closed movable contact 31a
And the normally-open movable contact 31b comes into contact with and separates from the normally-closed fixed contact 32a and the normally-open fixed contact 33a, respectively, and a contact gap having a predetermined gap is formed between the normally-open movable contact 31b and the normally-open fixed contact 33a. Is done.

Reference numeral 4 denotes a card, which is formed in a plate shape from an insulating resin, has one end and the other end, and has an engaging projection 41 at one end. It is locked in the provided locking hole 31f.

Reference numeral 5 denotes a case, which is formed in a box shape with a bottom and made of insulating resin, is fitted to the body 1, and a regulating rib 51 is formed in the engaging groove 12c of the insulating wall 12 as shown in FIG. It is provided at the corresponding position.

As shown in FIG. 4, both movable contacts 31a, which are connected to a common terminal 31e via a movable contact spring 31,
The common terminals 31b are integrated to form a common terminal block 3a. The common terminal block 3a and the normally-open fixed terminal plate 33 face in the protruding direction of the other piece 12b of the insulating wall 12, and the electromagnet section 2 and the normally-closed fixed terminal plate 32 face in the opposite direction to the protruding direction. Respectively, that is, they are implemented from opposite directions. And the insulating wall 1
2, the other piece 12b is provided between the electromagnet part 2 and the contact part 3, the contact part 3 is arranged on the side opposite to the one piece 12a with respect to the other piece 12b, and the electromagnet part 2 is arranged on the one piece 12a side. You. Here, since the movable contact spring 31 is bent in two steps toward the electromagnet section 2 side, the common terminal 31e is formed.
Are disposed on the electromagnet section 2 side with respect to the normally closed fixed terminal 32b and the normally open fixed terminal 33b, and are disposed on the one piece 12a side of the insulating wall 12.

As shown in FIG. 3, a normally closed fixed contact 32a of the contact portion 3 is provided on the electromagnet portion 2 side with respect to both movable contacts 31a and 31b. Therefore, a cross portion 32c occurs where the normally closed fixed terminal plate 32 and the first bent portion 31c of the movable contact spring 31 cross, and another insulating wall 13 is located at the cross portion 32c, and the normally closed fixed terminal is located. The plate 32 and the movable contact spring 31 are insulated.

As shown in FIG. 7, the card 4 is
In the engagement groove 12c, the engagement groove 12c is engaged with the engagement groove 12c, and the engaging projection 41 is positioned by being locked in the locking hole 31f provided in the movable contact spring 31, One end contacts the movable contact spring 31 and the other end contacts the armature 24. When the case 5 is fitted to the body 1, the regulating rib 51 is engaged with the engaging groove 12c.
The card 4 inserted into the engagement groove 12c regulates the displacement of the other piece 12b in the projecting direction.

The operation of this will be described. When a DC voltage is applied to the coil terminal 22b, the coil 22 wound around the iron core 21 is excited, and the yoke 21 is formed by caulking one end 23a of the iron core 21 to one end 21a of the iron core 21. 23
And an armature 24 rotatably supported at the end of the other piece 23b of the yoke 23 to form a magnetic path. As a result, one piece 24a of the armature 24 is attracted to the other end 21b of the iron core 21 to generate a driving force, and the driving force is transmitted to the movable contact spring 31 via the card 4 to open and close the contact portion 3. Drive. The movable contacts 31a and 31b are normally closed movable contacts 31a.
Is separated from the normally closed fixed contact 32a, the normally open movable contact 31b contacts the normally open fixed contact 33a, and the common terminal 3
1e and the normally closed fixed terminal 32b are opened, and the common terminal 31e and the normally opened fixed terminal 33b are closed.

At this time, as shown in FIGS. 4 and 10,
Since the common terminal 31e is provided on the side of the one piece 12a of the insulating wall 12, the one piece 12a and the other piece 12b are provided between the armature 24 of the electromagnet section 2 and the movable contact spring 31, and Bottom 11 is armature 24 and common terminal 31
e, the electromagnet part 2 and the contact part 3
The insulation between them is increased.

Next, when the DC voltage is removed from the coil terminal 22b, the piece 24a of the armature 24 is released from the other end 21b of the iron core 21, and the normally closed movable contact 31a contacts the normally closed fixed contact 32a. And the normally open movable contact 31b
Is separated from the normally-open fixed contact 33a, and the common terminal 31e
And the normally closed fixed terminal 32b are closed, and the common terminal 31e and the normally open fixed terminal 33b are opened.

In the electromagnetic relay according to the embodiment, as described above, the other piece 12b of the insulating wall 12 is located between the electromagnet section 2 and the contact section 3 and protrudes from the bottom section 11 of the body 1. Since the common terminal 31e is provided on the side of the piece 12a of the insulating wall 12, the common terminal 31e is provided.
e, between the movable contact spring 31 and the electromagnet section 2
The common terminal 31e, which is highly insulated by the 2a and the other piece 12b and is advantageous to the user, can be reduced in size with the common terminal 31e arranged on the electromagnet section 2 side.

Further, the common terminal block 3a is
b in the protruding direction, and the other piece 12b is disposed on the opposite side of the one piece 12a, and the electromagnet section 2 is mounted in the opposite direction to the protruding direction to form the one piece 12b.
a, the one piece 12a and the other piece 12b are located between the armature 24 of the electromagnet section 2 and the movable contact spring 31, and the bottom 11 of the body 1 is located between the armature 24 and the common terminal 31e. Since the position between the electromagnet portion 2 and the contact portion 3 is high, the insulation between the electromagnet portion 2 and the contact portion 3 is as high as possible. Since the block 3a and the electromagnet section 2 are mounted from opposite directions, they can be easily assembled.

Further, since another insulating wall 13 is provided at a position corresponding to the cross portion 32c where the normally closed fixed terminal plate 32b and the movable contact spring 31 cross each other, the portion between the fixed terminal plate and the movable contact spring 31 at the cross portion 32c is provided. Can be reliably insulated.

Further, the engaging projection 41 for engaging with the engaging hole 31f provided on the movable contact spring 31 is provided at one end of the card 4, and the engaging groove 12c is provided on the insulating wall 12. The card 4 has an engagement groove 12c and an engagement hole 31f.
Thus, the positioning can be performed accurately and easily, and the contact gap between the movable contact and the fixed contact can be stably obtained.

Further, the regulating rib 51 is provided in the case 5 in the engagement groove 1.
Since it is provided at the position corresponding to 2c, the displacement of the card 4 in the protruding direction is regulated, and the contact portion can be driven to open and close accurately and stably.

In this embodiment, the contact portion 3 is configured such that the normally-closed movable contact 31a and the normally-open movable contact 31b contact and separate from the normally-closed fixed contact 32a and the normally-open fixed contact 33a, respectively. Movable contact 31a or normally open movable contact 31b
The contact portion 3 may be formed so that either one of the contact portions comes into contact with or separate from the normally closed fixed contact 32a or the normally open fixed contact 33a, that is, the contact portion 3 may be formed as one set instead of two sets,
Not limited.

In the present embodiment, the movable contact spring 31
Further, another insulating wall 13 for insulating the normally closed fixed terminal plate 32 is provided on the body 1, but as shown in the conventional example of FIG. 12, the fixed contact C1 moves to the opposite side of the electromagnet section 2 with respect to the movable contact C2. When it is provided, that is, when the cross portion 32c is not generated, another insulating wall 13 need not be provided, and there is no limitation.

[0035]

According to the first aspect of the present invention, the other end of the insulating wall is located between the electromagnet portion and the contact portion and protrudes from the bottom of the body, and the common terminal is on one side of the insulating wall. The common terminal and the movable contact spring are highly insulated from the electromagnet part by one piece and the other piece, so that the size of the common terminal which is advantageous to the user can be reduced in a state where the common terminal is arranged on the electromagnet part side. .

According to the second aspect, in addition to the effect of the first aspect, the common terminal block is mounted in the projecting direction of the other piece of the insulating wall and arranged on one side opposite to the other piece. And the electromagnet part is mounted in the opposite direction to the protruding direction and disposed on one side, so that one piece and the other piece are between the armature of the electromagnet part and the movable contact spring, and the bottom of the body is the armature. The high insulation between the electromagnet part and the contact part is located between each and the common terminal, so that sufficient insulation performance is ensured even if the two parts are as close as possible, and further miniaturization is achieved. In addition, since the common terminal block and the electromagnet portion are mounted from opposite directions, it is easy to assemble.

According to the third aspect, in addition to the effects of the first or second aspect, if the fixed contact is provided on the electromagnet portion side with respect to the movable contact, another insulating wall is provided. Is provided at a position corresponding to the cross portion where the fixed terminal plate and the movable contact spring cross, so that the fixed terminal plate and the movable contact spring in the cross portion can be reliably insulated.

According to a fourth aspect of the present invention, in addition to the effects of any one of the first to third aspects, an interlocking projection which engages with an engaging hole provided in the movable contact spring has one end. And the engagement groove is provided in the insulating wall, so that the card is accurately and easily positioned by the engagement groove and the locking hole, and the contact gap between the movable contact and the fixed contact is stabilized. Can be obtained.

According to the fifth aspect, in addition to the effect of the fourth aspect, since the regulating rib is provided at the position corresponding to the engaging groove in the case, the displacement of the card in the projecting direction is regulated. In addition, it is possible to stably and accurately open and close the contact portion.

[Brief description of the drawings]

FIG. 1 is a plan sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view of the same.

FIG. 4 is a perspective view of the same.

FIG. 5 is a partial plan sectional view of the same assembled state.

FIG. 6 is a front view of an assembled state of the above.

FIG. 7 is a left side view of the same assembled state.

FIG. 8 is a left side sectional view of the cross portion in the assembled state of the same.

FIG. 9 is a bottom view of the same assembled state.

FIG. 10 is a rear view of the assembled state of the above.

FIG. 11 is a perspective view showing a conventional example.

FIG. 12 is a front view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 11 Bottom part 12 Insulating wall 12a One piece 12b Other piece 12c Engaging groove 13 Another insulating wall 2 Electromagnet part 21 Iron core 21a One end 21b Other end 22 Coil 23 Yoke 24 Armature 3 Contact part 3a Common terminal block 31 Movable contact spring 31a Normally closed movable contact (movable contact) 31b Normally open movable contact (movable contact) 31e Common terminal 31f Locking hole 32 Normally closed fixed terminal plate (fixed terminal plate) 32a Normally closed fixed contact (fixed contact) 32b Normal Closed fixed terminal (fixed terminal) 32c Cross section 33 Normally-open fixed terminal plate (fixed terminal plate) 33a Normally-open fixed contact (fixed contact) 33b Normally-open fixed terminal (fixed terminal) 4 Card 41 Mole projection 5 Case 51 Regulatory rib

Claims (5)

[Claims] An armature rotatably supported by a body having a bottom and a yoke coupled to one end of an iron core wound with a coil is attracted and released to the other end of the iron core. An electromagnet portion, a contact portion having a fixed contact and a movable contact connected to the fixed terminal and the common terminal via a fixed terminal plate and a movable contact spring, respectively, wherein the movable contact comes into contact with and separates from the fixed contact; And a plate-shaped card that contacts the movable contact spring to open and close the contact portion, and an insulating wall protruding from the bottom of the body to insulate between the electromagnet portion and the contact portion, and the common terminal serves as the fixed terminal. In contrast, in the electromagnetic relay disposed on the electromagnet portion side, the insulating wall formed into a substantially L-shape having one piece and another piece protruding from the one piece, wherein the other piece has the electromagnet portion and the contact portion. And the common terminal is Electromagnetic relay, characterized in that disposed in position to the side. 2. The movable contact, which is connected to the common terminal via the movable contact spring, is integrated with each other to form a common terminal block, and the common contact is mounted in a projecting direction of the other piece. 2. The terminal block according to claim 1, wherein the electromagnet portion mounted in a direction opposite to a direction in which the terminal block protrudes is arranged on the opposite side of the one piece and the one side with respect to the other piece, respectively. 3. Electromagnetic relay. 3. The contact portion, wherein the fixed contact is provided on an electromagnet portion side with respect to the movable contact, and another insulating wall for insulating between the fixed terminal plate and the movable contact spring is provided. The electromagnetic relay according to claim 1, wherein the electromagnetic relay is provided on the body at a position corresponding to a cross portion where each crosses. 4. The card according to claim 1, wherein an engaging projection is provided at one end of the card to be engaged with an engaging hole provided in the movable contact spring, and the insulating wall is cut in a direction opposite to the projecting direction. The electromagnetic relay according to any one of claims 1 to 3, wherein an engagement groove that engages with the card is provided in the other piece. 5. The case fitted to the body, wherein a regulating rib for regulating displacement of the card in the projecting direction is provided at a position corresponding to the engaging groove. Electromagnetic relay.