JP2002343215A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic relay with improved reliability of electrical connection, without having to enlarge the whole. SOLUTION: The electromagnetic relay is provided with a pair of stationary contacts 22 and 32 arranged facing each other, a movable spring plate 50 arranged between the stationary contacts 22 and 32 and provided with moving contacts 51a and 51b, respectively facing the stationary contacts 22 and 32 and contacting them, so as to be free to approach and separate from, an electromagnetic block 6, and a card 8 driven, in response to excitation/non-excitation of the electromagnetic block 6 and pressing the movable spring plate 50 in the direction of the moving contact 51b contacting the stationary contact 32 in excitation. The relay has pressing parts 82 and 82 respectively pressing both right and left side portions of the moving contact 51b in the movable spring plate 50 installed on the card 8, and lengths of the pressing parts 82 are wade mutually different.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay.

[0002]

2. Description of the Related Art Conventionally, a fixed contact plate having a fixed contact, an elastic movable spring plate provided with a movable contact which can freely contact and separate from the fixed contact, an electromagnet block, and excitation / non-excitation of the electromagnet block have been proposed. There has been provided an electromagnetic relay including a pressing member that presses a movable spring plate toward a fixed contact plate in response to excitation to bring the movable contact into contact with the fixed contact.

[0003]

In such an electromagnetic relay, there is a problem that the reliability of the electrical connection is reduced due to dirt or the like attached to the contact. The contact pressure between the movable contact and the fixed contact is increased by increasing the thickness of the contact plate.

[0004] However, when the thickness of the movable contact plate is increased, a larger attractive force is required, so that the size of the electromagnet block is increased, and as a result, the size of the entire electromagnetic relay is increased.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electromagnetic relay in which the reliability of electrical connection is improved without increasing the size of the whole. is there.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a fixed contact plate provided with a first fixed contact and a first fixed contact provided on a surface facing the first fixed contact. An elastic movable plate provided with a first movable contact that comes into contact with and separates from the fixed contact of the above, an electromagnet block equipped with a coil, and attracted or de-energized to the electromagnet block in accordance with excitation / non-excitation of the coil An armature that is separated and a pressing member that is driven in accordance with the operation of the armature and that presses the movable spring plate in a direction in which the first movable contact contacts the first fixed contact when the coil is excited, A plurality of pressing protrusions projecting to the movable spring plate side and having tips contacting the movable spring plate are provided at portions of the pressing member opposed to both side portions of the first movable contact on the movable spring plate, respectively, and a length dimension of each pressing protrusion is provided. Are different from each other That. Since the lengths of the pressing projections are different from each other as described above, when the movable spring plate is pressed by the pressing member, the movable spring plate, that is, the first movable contact moves in an inclined state. Therefore, when the first movable contact comes into contact with the first fixed contact, first, a part of the first movable contact comes into contact, and then the other part comes into contact. A moving movement (this movement is called wiping) occurs, and as a result, dirt and the like attached to the surface of the contact can be removed, and the reliability of the electrical connection can be improved. Further, the first movable contact is the first movable contact.
When contacting the fixed contact of the first, since the portion pressed by the long pressing protrusion of the length dimension first contacts the first fixed contact, the portion pressed by the other pressing protrusion comes into contact with a delay, Since the first movable contact is pressed by the pressing protrusion, contact bounce can be suppressed.

According to a second aspect of the present invention, in the first aspect of the present invention, a second fixed contact is disposed so as to face the first fixed contact, and the movable spring plate facing the second fixed contact has A second movable contact which comes into contact with the second fixed contact when the coil is not excited is provided. Like the invention of claim 1, the lengths of the pressing projections are different from each other. At the time of non-excitation, the movable spring plate, that is, the second movable contact moves in a tilted state, and when the second movable contact comes into contact with the second fixed contact, first, a part of the second movable contact is first used. After the contact, the other portions come into contact with each other, so that a movement (wiping) of the second movable contact in a lateral direction occurs, and as a result, dirt and the like attached to the surface of the contact are removed, and the electrical connection is established. Reliability can be improved.

According to a third aspect of the present invention, in the first aspect of the present invention, the surface of the first movable contact is formed in a planar shape, and the surface of the first fixed contact is formed in a curved shape. The center position of the movable contact is shifted from the center position of the first fixed contact, and in addition to the operation of the invention of claim 1, the first movable contact comes into contact with the first fixed contact. At this time, the first movable contact slides along the curved surface formed on the surface of the first fixed contact, so that the wiping effect can be further enhanced. In addition, since the center position of the first movable contact and the center position of the first fixed contact are shifted from each other, when the first movable contact comes into contact with the first fixed contact, the first movable contact is moved. The distance that the contact moves in the lateral direction is increased, and the wiping effect can be further enhanced.

According to a fourth aspect of the present invention, in the first aspect, the surface of the first movable contact is formed in a planar shape, the surface of the first fixed contact is formed in a curved shape, and the movable spring is provided. The fixed contact plate is arranged in a state of being inclined with respect to the plate. In addition to the operation of the invention of claim 1, when the first movable contact comes into contact with the first fixed contact,
Since the first movable contact slides along the curved surface formed on the surface of the first fixed contact, the wiping effect can be further enhanced. In addition, since the fixed contact plate is inclined with respect to the movable spring plate, the first movable contact comes into contact with the first fixed contact as compared with the case where the fixed contact plate is arranged substantially parallel to the movable spring plate. In doing so, the distance over which the first movable contact moves in the lateral direction becomes longer, and the wiping effect can be further enhanced.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the surface of the first movable contact is formed in a planar shape, and the surface of the first fixed contact is formed in a curved shape. The plate is provided with an inclined piece inclined with respect to another portion, and the inclined piece is provided with a first fixed contact. In addition to the function of the invention of claim 1, the first movable contact is a first fixed contact. Since the first movable contact slides along the curved surface formed on the surface of the first fixed contact when contacting the fixed contact, the wiping effect can be further enhanced. In addition, since the first fixed contact is provided on the inclined piece that is inclined with respect to other parts, compared with the case where the first fixed contact is provided on the part of the fixed contact plate substantially parallel to the movable spring plate. Thus, when the first movable contact contacts the first fixed contact,
The distance over which the first movable contact moves in the lateral direction is increased, and the wiping effect can be further enhanced. Moreover,
By adjusting the inclination angle of the inclined piece, the coil current when the first movable contact contacts the first fixed contact can be changed to adjust the relay sensitivity.

According to a sixth aspect of the present invention, in the first aspect of the present invention, a terminal for external connection is provided, a terminal plate fixed by caulking to a movable spring plate is provided, and a through hole for positioning is provided in the terminal plate. In addition, a communication hole communicating with the through hole is provided through the movable spring plate, and in addition to the operation of the invention of claim 1, the communication hole provided in the terminal plate and the communication hole provided in the movable spring plate are provided. By inserting the pins of the jig, the positioning of the terminal plate and the movable spring plate can be performed, and the work of connecting the terminal plate and the movable spring plate can be easily performed. Further, even when the terminal plate and the movable spring plate are each caulked and fixed in the state of the hoop material, since the positioning through hole and the communication hole are formed in the component, the component may be taken up to the end of the hoop material. It is possible to reduce the portion where the material is wasted.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) The structure of an electromagnetic relay according to an embodiment of the present invention will be described with reference to FIGS. This electromagnetic relay includes a body 1 composed of a resin base 11 and a cover 12, a fixed contact block 2 on the NC contact (normally closed contact) side, a fixed contact block 3 on the NO contact (normally open contact) side, and A movable contact block 4 interposed between the fixed contact blocks 2 and 3;
, An armature block 7, and a card (pressing member) 8. In the following description, unless otherwise specified, the vertical direction is defined in the direction of FIG. 3A, the vertical direction in FIG. 3B is defined as the left and right direction, and the right side in FIG. , The left side will be the back.

The lower surface of the base 11 is formed in a substantially rectangular shape, and a box-shaped housing portion 13 having an open rear surface is provided at a central portion in the longitudinal direction. Partitions 14, 14 running in the lateral direction are provided upright at the front end of the base 11, and three storage sections 15 are formed by these partition walls 14. The movable contact block 4 is stored.

The cover 12 has a box shape with an open lower surface, and is attached to the base 11 so as to cover the upper surface of the base 11.

The fixed contact block 2 on the NC contact side includes a fixed contact plate 21 formed in a strip shape of a metal material, a fixed contact (second fixed contact) 22 provided on the upper front surface of the fixed contact plate 21, and A substantially U-shaped connecting portion 23 continuously and integrally extended from a lower edge of the fixed contact plate 21, and terminal pins 24, 24 protruding downward from tips of both side pieces of the connecting portion 23. . Similarly, the fixed contact block 3 on the NO contact side
Is a fixed contact plate 31 formed in a strip shape from a metal material.
A fixed contact (first fixed contact) 32 provided on an upper rear surface of the fixed contact plate 31; and a pair of terminal pins 3 extending continuously and integrally from both lower side edges of the fixed contact plate 31.
And 3. These fixed contact blocks 2 and 3 are incorporated into the base 11 such that the fixed contacts 22 and 32 face each other, and are housed in the housing 1. Further, the terminal pins 24 of the fixed contact blocks 2 and 3,
25 is inserted into a through hole (not shown) formed on the bottom surface of the storage compartment 15 and protrudes downward from the lower surface of the base 11.

The movable contact block 4 comprises a terminal plate 40 and a movable spring plate 50. The terminal board 40 is shown in FIG.
As shown in FIG. 2B, a pair of substantially L-shaped terminal pins 41 are integrally formed on both sides of the lower edge so as to protrude integrally. On one surface of the terminal plate 40, a pair of caulking protrusions 42, 42 are provided by projecting the terminal plate 40 from the opposite side, and are provided side by side. Are drilled. On the other hand, the movable spring plate 50 is formed of an elastic metal material as shown in FIGS. 8A and 8B, and a round hole 50a is provided substantially at the upper center of the movable spring plate 50. The second movable contact 51a and the first movable contact 51b are caulked and fixed from both sides. The movable contact 51a,
Projections 83, 8 of the card 8, which will be described later, are provided on the left and right sides of the 51b.
3 are formed to engage with the movable contact 5.
A notch groove 53 is provided between the engagement holes 52 and 1a, 51b.
Are formed. At the lower end of the movable spring plate 50, a pair of insertion holes 54, 54 provided on the terminal plate 40 through which swaging protrusions 42, 42 are respectively inserted, and a positioning hole communicating with the through hole 43 of the terminal plate 40. A communication hole 55 is formed. An opening 56 is formed substantially at the center of the movable spring plate 50 in the vertical direction.
Is easy to bend.

Here, when connecting the terminal plate 40 and the movable spring plate 50, the positions of the terminal plate 40 and the movable spring plate 50 are determined by passing pilot pins (not shown) through the positioning through holes 43 and the communication holes 55. Then, the swaging protrusion 42 provided on the terminal plate 40 is inserted into the insertion hole 54 of the movable spring plate 50,
By crushing the tip of the caulking projection 42, the terminal plate 4
0 and the movable spring plate 50 are connected. As described above, since the positioning through hole 43 and the communication hole 55 for positioning the terminal plate 40 and the movable spring plate 50 are provided in the respective components, the terminal plate 40 and the movable spring plate 50 are hooped. Even in the case of caulking and fixing in the state of the material, parts can be taken up to the end of the hoop material, and the wasted portion of the material can be minimized.

The movable contact block 4 includes a movable contact 51
a and 51b are incorporated into the base 11 so as to oppose the above-mentioned fixed contacts 22 and 32 so as to be freely separated from each other, and are housed in the body 1. At this time, the terminal pins 41 of the movable contact block 4 are inserted into through holes (not shown) formed in the bottom surface of the storage compartment 15 and protrude downward from the lower surface of the base 11.

The electromagnet block 6 is shown in FIG.
As shown in (b), the yoke 61, the iron core 62, the coil bobbin 63, and the coil 64 wound around the coil bobbin 63
And a storage portion 13 provided on the base 11
And housed in the housing 1.

The yoke 61 is formed in an L shape, and the coil 64
Are arranged so as to cover the front surface and the lower surface. And
On a side piece of the yoke 61 covering the front surface of the coil 64, a round hole 61a to which the iron core 62 is caulked and fixed is formed.

The iron core 62 has a columnar shape having a cross section larger than the round hole 61a of the yoke 61. A flange 62b projecting outward is provided at the rear end, and the iron core 62 has a round hole 61a.
A columnar projection 62a slightly smaller than that is provided at the left end.

The coil bobbin 63 is formed of a synthetic resin having an insulating property into a cylindrical shape, and has flanges 63a and 63b at both ends.
Is provided, and the coil 64 is wound around a portion between the flange portions 63a and 63b. A pair of leg pieces 63c, 63c protruding downward are formed on the left and right sides of the rear flange 63a, and the coil terminals 65 are press-fit into grooves 63d provided on each leg piece 63c. Then, both ends of the coil 64 are electrically connected to each coil terminal 65.

When assembling the electromagnet block 6, the coil 64 is wound between the flanges 63 a and 63 b of the coil bobbin 63, and both ends of the coil 64 are connected to the coil bobbin 6.
After being connected to the coil terminal 65 attached to the coil 3, the iron core 62 is inserted into the cylinder of the coil bobbin 63 from the flange 63 a side, and the protrusion 62 a of the iron core 62 projecting from the flange 63 b is connected to the yoke 61. By press-fitting into the round hole 61a, the yoke 6
1 and the iron core 62 are fixed to the coil bobbin 63.

The armature block 7 includes an armature 71 and a hinge spring 72. The armature 71 is formed in a strip shape from a magnetic material, and has a pair of caulking projections 73, 73 arranged on one surface in the vertical direction.
The hinge spring 72 is formed of an elastic material, and has a rectangular plate-shaped fixing piece 72a fixed to the lower surface of the yoke 61;
2a and a caulking piece 72c connected via hinge portions 72b, 72b are formed in a substantially L-shaped cross section. Caulking piece 7
2c is formed with a pair of insertion holes 72d into which the caulking projections 73 provided on the armature 71 are respectively inserted. The caulking projections 73 of the armature 71 are inserted into these insertion holes 72d, and the caulking projections 73 are formed. , The armature 71 and the hinge spring 72 are coupled. The fixing piece 72a is formed by cutting and raising the fixing piece 72a. As shown in FIG. 4, the locking piece 72e and the concave portion 61b provided in the yoke 61 are locked to form the hinge spring 72e. The lower end of the armature 71 is rotatably supported on the distal end surface of the yoke 61 via the hinge spring 72.

The card 8 is formed in a rectangular frame shape from a synthetic resin having an insulating property, and is bridged between the movable contact block 4 and the armature block 7. A hole 81 is formed at the rear end of the card 8 into which a protrusion 74 provided at the upper end of the armature 71 is inserted. Pressing portions 82 projecting toward the movable spring plate 50 are formed at both left and right sides of the front end. , 82 are projected.
A shaft-like projection 83 inserted into the engagement hole 52 of the movable contact block 4 is provided at the tip of each pressing portion 82 so that the diameter of each projection 83 becomes smaller toward the tip. .

In this card 8, the projection 74 of the armature 71 is inserted into the hole 81 provided at the rear end, and the projections 83, 83 provided at the front end are engaged with the engagement holes 5 of the movable contact block 4.
By engaging the armatures 2 and 52, a bridge is formed between the armature 71 and the movable contact block 4. Here, FIG.
(C) two pressing portions 8 provided on the card 8
2 and 82 are different from each other, and the length dimension of the right pressing portion 82 is longer than the left pressing portion 82 by the distance W, so that the card 8 is attached to the armature 71 and the movable contact block 4. When the bridge is bridged between the movable spring plate 50 and the engaging portion 52 of the movable spring plate 50, the projection 83 provided on the pressing portion 82 on the long side (right side) of the length dimension presses the movable spring plate 50, The protrusion 83 provided on the pressing portion 82 on the shorter side of the length dimension is inserted into the engaging hole 52 of the movable spring plate 50 with a gap. Here, the pressing portion 82 and the projection 83 form the movable spring plate 5
0, projecting from both sides of the movable contact 51b at the portions of the card 8 which oppose each other, and a pressing projection whose leading end contacts the movable spring plate 50 is formed.

When the card 8 is bridged between the armature 71 and the movable contact block 4, the upper end of the storage section 13 is inserted into an opening 84 provided at the center of the card 8, and the upper end of the storage section 13 is inserted. Since the card 8 is guided by the section, the card 8 can be moved smoothly.

Next, the operation of the electromagnetic relay will be briefly described. When the coil 64 is not energized, the card 8 moves leftward in FIG. 4 by the spring return force of the hinge spring 72 and the movable spring plate 50, and the armature 71 separates from the flange 62 b of the iron core 62. And the movable contact 51a
Are in contact with the fixed contact 22 on the NC side.

When the coil 64 is energized (excited state), the armature 71 is attracted to the flange 62b of the iron core 62 and rotates clockwise in FIG.
Moves to the right in FIG. At this time, the card 8 presses the movable spring plate 50 rightward in FIG. 4 against the spring force of the hinge spring 72 and the movable spring plate 50 to separate the movable contact 51a from the fixed contact 22 on the NC side. , Movable contact 51
b is brought into contact with the fixed contact 32 on the NO side. By the way, as described above, the lengths of the two right and left pressing portions 82 are different from each other, and the pressing portion 82 on the longer side has the longer length.
Of the movable spring plate 50 engages with the engagement hole 52 of the movable spring plate 50, and the projection 8 provided on the pressing portion 82 on the shorter side of the length dimension.
3 is inserted into the engagement hole 52 with a gap, so that only one side of the movable spring plate 50 is pressed by the card 8, and the movable spring plate 50 is inserted in the state shown in FIG. It moves forward with the lower side inclined forward and the upper side inclined backward.
Therefore, when the movable contact 51b contacts the fixed contact 32 on the NO side, the lower side of the movable contact 51b contacts first, and then the upper side contacts.
The movement of 0 sliding laterally (wiping) occurs, and dirt and the like attached to the surface of the contact are removed.
The reliability of the electrical connection is improved.

Thereafter, when energization of the coil 64 is stopped (non-excited state), there is no force to attract the armature 71,
The card 8 moves leftward in FIG. 4 by the spring return force of the hinge spring 72 and the movable spring plate 50, and the armature 71 separates from the flange 62 b of the iron core 62, and the movable contact 51
b is separated from the fixed contact 32 on the NO side, and the movable contact 51a contacts the fixed contact 22 on the NC side. Here, since the length dimensions of the two right and left pressing portions 82 are different from each other, the movable spring plate 50 is shown in FIG.
Since the upper side of the middle retreats forward with the lower side inclined backward, when the movable contact 51b contacts the fixed contact 22 on the NC side, the upper side of the movable contact 51b first contacts first,
Thereafter, since the lower side comes into contact, a movement (wiping) in which the movable spring plate 50 slides in the lateral direction at the time of contact occurs, thereby removing dirt and the like adhered to the surface of the contact, thereby improving the reliability of the electrical connection. Thus, the movable contacts 51a, 51
Since wiping occurs when b contacts the fixed contacts 22 and 32, the reliability of the electrical connection can be improved without increasing the contact pressure of the contacts, and the electromagnetic relay can be prevented from being enlarged.

(Embodiment 2) Embodiment 2 of the present invention is shown in FIG.
3 and FIG. In the present embodiment, in the electromagnetic relay described in the first embodiment, the surface of the movable contact 51b is formed in a planar shape, and the surface of the fixed contact 32 on the NO side is formed in a curved shape, as shown in FIG. The center position CL1 of the fixed contact 32 and the center position CL2 of the movable contact 51b are shifted laterally.
Since the configuration other than the fixed contact 32 and the movable contact 51b is the same as that of the first embodiment, the same components are denoted by the same reference numerals and description thereof will be omitted.

As described above, since the surface shape of the movable contact 51b is a flat shape and the surface shape of the fixed contact 32 is a curved shape, when the movable contact 51b contacts the fixed contact 32, the surface of the fixed contact 32 is Since the movable contact 51b slides along the formed curved surface shape, the wiping effect can be further enhanced. In addition, since the center position of the movable contact 51b and the center position of the fixed contact 32 are displaced from each other, when the movable contact 51b contacts the fixed contact 32, the distance that the movable contact 51b moves in the lateral direction is long. Thus, the wiping effect can be further enhanced.

(Embodiment 3) Embodiment 3 of the present invention is shown in FIG.
5 and FIG. In the present embodiment, in the electromagnetic relay described in the first embodiment, as shown in FIG. 16, the surface of the movable contact 51b is formed to be flat, and the surface of the NO-side fixed contact 32 is formed to be curved. The fixed contact plate 31 is attached to the base 11 in a state where the fixed contact plate 32 is inclined with respect to the movable contact 51b (that is, a state where the fixed contact plate 32 is inclined with respect to the movable spring plate 50). Since the configuration other than the fixed contact plate 31 and the movable contact 51b is the same as that of the first embodiment, the same components are denoted by the same reference numerals and description thereof will be omitted.

As described above, since the surface shape of the movable contact 51b is a flat shape and the surface shape of the fixed contact 32 is a curved surface, when the movable contact 51b contacts the fixed contact 32, the surface of the fixed contact 32 is Since the movable contact 51b slides along the formed curved surface shape, the wiping effect can be further enhanced. Moreover, since the fixed contact plate 31 is attached to the base 11 in a state where the fixed contact plate 31 is inclined with respect to the movable spring plate 50, the movable contact 51b When contacting the fixed contact 32, the distance that the movable contact 51b slides in the lateral direction can be increased, and the wiping effect can be enhanced.

In the present embodiment, the fixed contact plate 31 is attached to the base 11 in an inclined state.
As shown in (a) to (c), the fixed contact plate 31 is provided with an inclined piece 34 inclined continuously with respect to the other part of the fixed contact plate 31, and the fixed contact 32 is provided on the inclined piece 34. As described above, when the movable contact 51b comes into contact with the fixed contact 32, the distance that the movable contact 51b slides in the lateral direction can be increased, and the wiping effect can be enhanced. In addition, the inclined piece 3 with respect to other portions of the fixed contact plate 31
By adjusting the inclination of 4, the coil current when the movable contact 51b contacts the fixed contact 32 can be changed, and the relay sensitivity can be easily adjusted.

[0037]

As described above, the first aspect of the present invention provides the first aspect.
A fixed contact plate provided with a fixed contact, and a movable spring plate having elasticity provided with a first movable contact on a surface facing the first fixed contact so as to be able to freely contact and separate from the first fixed contact. ,
An electromagnet block with a coil,
An armature that is attracted or departed from the electromagnet block in response to non-excitation, and a movable spring that is driven in accordance with the operation of the armature and is oriented such that the first movable contact contacts the first fixed contact when the coil is excited. A pressing member for pressing the plate, and a pressing protrusion projecting toward the movable spring plate and having a distal end contacting the movable spring plate at a portion of the movable spring plate where the pressing member opposes both sides of the first movable contact. It is characterized in that a plurality of pressing projections are provided, and the length dimensions of each pressing projection are different from each other. Since the lengths of the pressing projections are different from each other as described above, when the movable spring plate is pressed by the pressing member, the movable spring plate, that is, the first movable contact moves in an inclined state. Therefore, when the first movable contact comes into contact with the first fixed contact, first, a part of the first movable contact comes into contact, and then the other parts come into contact with each other. Moving movement (wiping) occurs, and as a result, dirt and the like attached to the surface of the contact can be removed to improve the reliability of the electrical connection. There is an effect that the property is improved.
Further, when the first movable contact comes into contact with the first fixed contact, first, a portion pressed by the long pressing protrusion having a long dimension contacts the first fixed contact, and then is pressed by another pressing protrusion. Since the contact portions come in contact with a delay, there is an effect that contact bounce can be suppressed by pressing the first movable contact by another pressing protrusion.

According to a second aspect of the present invention, in the first aspect of the present invention, a second fixed contact is disposed so as to face the first fixed contact, and the movable spring plate facing the second fixed contact has A second movable contact which comes into contact with the second fixed contact when the coil is not excited is provided, as in the first aspect of the present invention.
Since the length dimensions of the pressing projections are different from each other, the movable spring plate, that is, the second movable contact moves in a tilted state even when the excitation is not performed, and the second movable contact comes into contact with the second fixed contact. When the second movable contact first contacts a part of the second movable contact and then contacts the other part, a movement (wiping) of the second movable contact in a lateral direction occurs, and as a result, the contact It is possible to improve the reliability of the electrical connection by removing dirt and the like attached to the surface of the relay, and to improve the reliability of the electrical connection without increasing the size of the relay.

According to a third aspect of the present invention, in the first aspect of the present invention, the surface of the first movable contact is formed in a planar shape, and the surface of the first fixed contact is formed in a curved shape.
The center position of the first movable contact and the center position of the first fixed contact are displaced from each other, and in addition to the operation of the invention of claim 1, the first movable contact is connected to the first fixed contact. At the time of contact, the first movable contact slides along the curved surface formed on the surface of the first fixed contact, so that the wiping effect can be further enhanced. In addition, since the center position of the first movable contact and the center position of the first fixed contact are shifted from each other, when the first movable contact comes into contact with the first fixed contact, the first movable contact is moved. There is an effect that the distance that the contact moves in the lateral direction is increased, and the wiping effect can be further enhanced.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the surface of the first movable contact is formed in a planar shape, and the surface of the first fixed contact is formed in a curved shape.
The fixed contact plate is disposed in a state of being inclined with respect to the movable spring plate. In addition to the operation of the invention of claim 1, when the first movable contact contacts the first fixed contact, Since the first movable contact slides along the curved surface formed on the surface of the first fixed contact, there is an effect that the wiping effect can be further enhanced. In addition, since the fixed contact plate is inclined with respect to the movable spring plate, the first movable contact comes into contact with the first fixed contact as compared with the case where the fixed contact plate is arranged substantially parallel to the movable spring plate. In this case, the distance in which the first movable contact moves in the lateral direction becomes longer, and the wiping effect can be further enhanced.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the surface of the first movable contact is formed in a planar shape, and the surface of the first fixed contact is formed in a curved shape.
The fixed contact plate is provided with an inclined piece that is inclined with respect to other parts,
A first fixed contact is provided on the inclined piece,
In addition to the operation of the first aspect, when the first movable contact comes into contact with the first fixed contact, the first movable contact slides along a curved surface formed on the surface of the first fixed contact. Moving, the wiping effect can be further enhanced. In addition, since the first fixed contact is provided on the inclined piece that is inclined with respect to other parts, compared with the case where the first fixed contact is provided on the part of the fixed contact plate substantially parallel to the movable spring plate. Thus, when the first movable contact comes into contact with the first fixed contact, the distance in which the first movable contact moves in the lateral direction becomes longer, and the wiping effect can be further enhanced. Further, by adjusting the inclination angle of the inclined piece, there is an effect that the coil sensitivity when the first movable contact comes into contact with the first fixed contact can be changed to adjust the relay sensitivity.

According to a sixth aspect of the present invention, in the first aspect of the present invention, a terminal for external connection is provided, a terminal plate fixed by caulking to a movable spring plate, and a through hole for positioning is provided in the terminal plate. In addition, a communication hole communicating with the through hole is provided through the movable spring plate, and in addition to the operation of the invention of claim 1, the communication hole provided in the terminal plate and the communication hole provided in the movable spring plate are provided. By inserting the pins of the jig, the positioning of the terminal plate and the movable spring plate can be performed, and there is an effect that the work of connecting the terminal plate and the movable spring plate can be easily performed. Further, even when the terminal plate and the movable spring plate are each caulked and fixed in the state of the hoop material, since the positioning through hole and the communication hole are formed in the component, the component may be taken up to the end of the hoop material. Thus, there is an effect that a portion where the material is wasted can be reduced.

[Brief description of the drawings]

FIG. 1 is an external perspective view of an electromagnetic relay according to a first embodiment with a cover removed.

FIG. 2 is an exploded perspective view of the above, in which a part is omitted.

3A and 3B show a state in which the cover is removed, in which FIG. 3A is a side view and FIG. 3B is a top view.

FIG. 4 is a sectional view of the same.

5A and 5B show the same card, wherein FIG. 5A is a front view and FIG.
Is a right side view, (c) is a left side view, (d) is a top view,
(E) is a bottom view.

6A and 6B show an engagement state between the cover and the movable spring piece, in which FIG. 6A is a diagram viewed from the upper side, FIG. 6B is a diagram viewed from the side, and FIG. FIG.

FIGS. 7A and 7B show the same electromagnet block, wherein FIG. 7A is an exploded perspective view and FIG. 7B is an external perspective view.

8A and 8B show a movable spring piece according to the embodiment, and FIG.
(B) is a side view.

9A and 9B show a terminal plate of the above, wherein FIG. 9A is a front view and FIG.
Is a side view.

10A and 10B show a movable contact block according to the third embodiment, wherein FIG. 10A is a front view and FIG. 10B is a side view.

11A and 11B show the movable contact block according to the third embodiment, wherein FIG. 11A is an exploded perspective view showing a state before assembly, and FIG. 11B is an external perspective view.

12A and 12B show an armature block according to the embodiment, wherein FIG. 12A is an exploded perspective view showing a state before assembly, and FIG. 12B is an external perspective view.

13A and 13B show a state in which a cover of the electromagnetic relay according to the second embodiment is removed, wherein FIG. 13A is a top view and FIG. 13B is a side view.

FIG. 14 is an enlarged view of a main part of the contact point section as viewed from above.

15A and 15B show a state in which a cover of the electromagnetic relay of the third embodiment is removed, where FIG. 15A is a top view and FIG. 15B is a side view.

FIG. 16 is an enlarged view of a main part of the same contact point as seen from above.

FIG. 17 shows a fixed contact plate of another electromagnetic relay of the above,
(A) is a front view, (b) is a side view, and (c) is a top view.

[Explanation of symbols]

 6 Electromagnet block 8 Card 32 Fixed contact 51b Movable contact 22, 32 Fixed contact 50 Movable spring piece 51a, 51b Movable contact 82 Pressing part

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01H 50/56 H01H 50/56 G

Claims (6)

[Claims] 1. A fixed contact plate provided with a first fixed contact, and a first movable contact provided on a surface facing the first fixed contact so as to freely contact and separate from the first fixed contact. A movable spring plate having elasticity, an electromagnet block having a coil, an armature attracted to or separated from the electromagnet block in accordance with excitation / non-excitation of the coil, and driven in accordance with the operation of the armature, And a pressing member that presses the movable spring plate in a direction in which the first movable contact contacts the first fixed contact at the time of excitation of the movable member. An electromagnetic relay, wherein a plurality of pressing protrusions projecting toward the movable spring plate side and having a tip abutting on the movable spring plate are provided at portions, and the length dimensions of the pressing protrusions are different from each other. 2. A second fixed contact is disposed opposite to the first fixed contact, and the second fixed contact is provided on a surface of the movable spring plate facing the second fixed contact when the coil is not energized. The electromagnetic relay according to claim 1, further comprising a second movable contact that is in contact with the electromagnetic relay. 3. The surface of the first movable contact is formed in a planar shape, the surface of the first fixed contact is formed in a curved shape, and the center position of the first movable contact and the first fixed contact are formed. 2. The electromagnetic relay according to claim 1, wherein the electromagnetic relay is arranged so as to be shifted from a center position of the electromagnetic relay. 4. A fixed contact plate in which the surface of the first movable contact is formed in a planar shape, the surface of the first fixed contact is formed in a curved shape, and is inclined with respect to the movable spring plate. The electromagnetic relay according to claim 1, wherein: 5. An inclined piece which forms the surface of the first movable contact into a planar shape, forms the surface of the first fixed contact into a curved surface, and inclines the fixed contact plate with respect to other portions. 2. The electromagnetic relay according to claim 1, wherein a first fixed contact is provided on the inclined piece. 6. A terminal plate for external connection is provided, a terminal plate fixed by caulking to a movable spring plate, a through hole for positioning is provided in the terminal plate, and a communication hole communicating with the through hole is movable. 2. The electromagnetic relay according to claim 1, wherein the electromagnetic relay extends through the spring plate.