JPH08329814A - Electromagnetic relay - Google Patents

Abstract

PURPOSE: To provide a relay which performs stable operation and is unlikely to generate poor contacting in its contact. CONSTITUTION: An electromagnetic relay is equipped with an electromagnet 1 having armature 15. a contact 3, a card 4 of insulative resin moved by the armature 15 to drive the contact 3, and a housing 2 of insulative resin where the mentioned members are installed, wherein the card 4 is equipped at both sides extensionally with elastic supporting pieces 4d, 4e whose ends 4g, 4h are supported by a housing 2, particularly by a coil frame 12 and a body 21 whereon the coil frame 12 is upright installed rigidly, in such a way as capable of deflecting in the direction of driving. Accordingly the ends 4g, 4h are not easy to wear with sliding owing to the same type of material because the ends 4g, 4h are supported by the housing 2 which is made not of metal but of insulative resin of the same sort, and it is not likely that abrasive powder likely to cause poor contacting of the contact sputters over the contact 3. Further because the supporting pieces 4d, 4e are installed extendedly on both sides, stable operation is ensured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay having an insulating resin card which is driven by an electromagnet section to drive a contact section.

[0002]

2. Description of the Related Art As this type of electromagnetic relay, there is one having a structure shown in FIG. The electromagnet part A of this thing is an iron core
And A _1, and the iron core A ₁ coil frame A _2, which is inserted is the yoke A ₃ whose one end is secured to the iron core A _1, a coil A ₄ which is wound coil frame A ₂ wound, an armature a ₆ coils a ₄ are being aspirated is rotatably hinge support in the iron core a ₁ to the other end of the yoke a ₃ by a hinge spring a ₅ fixed to the yoke a ₃ when energized , Are provided.

The housing B comprises a body B ₁ formed of an insulating resin and a cover B ₂ fitted on the body B ₁ , and the coil frame A ₂ is integrally formed with the body B ₁ .

The contact portion C is a fixed contact plate provided with fixed contacts.
C ₁ and contact spring C ₂ with movable contact to and from fixed contact
Is formed adjacent to body B ₁ .

The card D is made of an insulating resin, and a driving piece D ₂ and a pressed piece D ₃ are formed on the both surfaces of the central piece D ₁ so as to project in a substantially cross shape, and the tip of the driving piece D ₂ is formed. Is fitted into a driving hole formed in the contact spring C _{2 so as} to engage the tip end of the pressed piece D ₃ with a pressing hole formed in the armature A ₆ .

When the coil A ₄ is excited and the armature A ₆ is attracted by the iron core A ₁ to rotate, the card D becomes
As described above, in the state where the driving piece D ₂ and the pressed piece D ₃ are guided by the contact spring C ₂ and the armature A ₆ , respectively, the pressed piece D ₃ is pushed and moved by the armature A ₆ to drive. The piece D ₂ drives the contact spring C ₂ , and the contact portion C is opened and closed.

[0007]

In the conventional electromagnetic relay described above, in the card D, the tip of the drive piece D ₂ is in the drive hole of the contact spring C ₂ , and the tip of the pressed piece D ₃ is. Armature
It operates while being guided by the pressure holes of A ₆ , respectively,
Since the card D is made of insulating resin, the guided tip end slides on the metal contact spring C ₂ and the armature A ₆ and is worn out, resulting in unstable operation.
Abrasion powder may be scattered on the contact point C and contact failure may occur.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electromagnetic relay that is stable in operation and is unlikely to cause contact failure.

[0009]

In order to solve the above-mentioned problems, according to a first aspect of the present invention, an electro-magnet part, a contact part, and an insulating resin card which is moved by the electro-magnet part to drive the contact part. And a housing made of an insulating resin in which each of the members is disposed, the card includes a resilient support piece whose end is supported by the housing so as to be bent in the driving direction. The structure is extended on both sides.

According to a second aspect of the present invention, in the first aspect, the electromagnet portion has an armature that moves the card, and a hinge spring that rotatably hinges the armature. One piece is provided on the card.

According to a third aspect of the present invention, in the first aspect of the present invention, the housing has both engaging portions that engage and support the end portions of the both supporting pieces, respectively. It is configured to have an insertion opening.

According to a fourth aspect of the present invention, in the third aspect, the engaging portion is an engaging groove having a narrow cross-sectional shape on the opening side, and the supporting piece is formed in accordance with the cross-sectional shape. Has a configuration in which the end portion of is formed in a convex shape.

[0013]

According to the first aspect of the present invention, in the card made of the insulating resin, the end portion of the elastic supporting piece is supported by the housing made of the insulating resin instead of the metal so that it can be bent in the driving direction. Therefore, the end is less likely to wear due to the sliding of the same kind of material, and therefore the operation is stable, and the abrasion powder that causes the contact contact failure is not scattered to the contact part. Since the support piece is extended to both sides instead of one side, more stable operation can be achieved.

According to the second aspect of the present invention, when the card is incorporated, the armature can be rotatably supported by the hinge spring piece provided on the card, and the hinge spring is provided as a separate member. No need to provide.

Further, according to the third aspect of the present invention, the card is slidably inserted from the engaging insertion ports on the same direction side of both engaging portions provided on the housing. , Are engaged and supported by both the engaging portions.

According to another aspect of the present invention, the card is engaged when the convex-shaped end portions of both support pieces are slid and inserted from the engagement insertion openings of the engagement grooves of the housing. Since the cross-sectional shape of the groove is narrowed on the opening side, the convex portion of the end portion is caught by the opening-side portion of the engaging groove and cannot be removed.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. This one comprises an electromagnet section 1, a housing 2, a contact section 3 and a card 4.

Explaining the electromagnet section 1, 11 is an iron core, which is formed of a magnetic material into a rod shape, and the tip portion 11a has a large diameter due to header processing.

A coil frame 12 is made of an insulating resin, and a cylindrical winding drum portion 12a and a flange portion 12b are integrally formed with a body 21 described later, and the flange portion 12b is a tip portion 11a of the iron core 11 and an armature 15 described later. The suction piece 15a of the winding body 12 is formed into a concave shape with an open space between the bifurcated extension pieces 12c, 12c.
A coil 13 is wound around a.

Reference numeral 14 is a yoke, which is made of a magnetic material, and is a fixed piece 14a.
And a magnetic path piece 14b that is bent from the fixing piece 14a and extends in an L shape, and the fixing piece 14a is formed on the coil frame 12.
The iron core 11 fitted in the tubular winding body 12a is caulked and fixed to the base end portion thereof, and the magnetic path piece 14b penetrates a body 21 described later and is arranged in parallel along the coil 13.

Numeral 15 is an armature, which is made of a magnetic material and is attracted to the tip 11a of the iron core 11 by a suction piece 15a and a pressing piece 15b bent and extended from the suction piece 15a in an obtuse angle into a substantially L shape.
The inner side of the bent portion is rotatably supported by hinges so that the end portion 14c of the magnetic path piece 14b of the yoke 14 is, more specifically, the outer corner portion of the end portion 14c.

Next, the housing 2 comprises a body 21 and a cover 22 fitted on the body 21.

The body 21 is made of an insulating resin in a substantially flat plate shape, and the coil frame 12 is erected and integrally formed on one end side thereof as described above. Therefore, the coil frame 12 is also a housing. The body 21 and the flange 12b of the coil frame 12 can be regarded as a part of the coil frame 12.
The two ends of 2a are located parallel to each other. Then, the bifurcated extending pieces 12c, 12c of the collar portion 12b are each formed with a notch (engaging portion) 12d in which the inner corner is notched, and at a position corresponding to the notch 12d of the body 21. Is a groove (engagement portion) 21a dug in the width direction.
The notch 12d and the groove 21a have an engagement insertion opening that opens in the same direction when viewed from the side of the flange 12b of the coil frame 12.

The cover 22 is formed of an insulating resin and has a bottomed box shape with an opening matching the outer shape of the body 21.

Next, the contact portion 3 is composed of a fixed contact plate 3c and a contact spring, each of which is provided with a fixed contact 3a and a movable contact 3b which face each other.
3d is provided side by side and is fixed through the other end of the body 21.

Next, the card 4 is formed of an insulating resin having excellent elasticity such as polyamide or polyacetal so that the driving piece 4b and the pressed piece 4c are protruded from both sides of the central piece 4a and are formed in a cross shape in cross section. At the same time, thin plate-like elastic support pieces 4d and 4e are extended from both ends of the central piece 4a, and one of the support pieces 4d further has a thin plate-like hinge in the same direction as the protruding direction of the pressed piece 4c. The spring piece 4f is extended.

Then, this card 4 is slid into the engaging insertion opening opened from the flange portion 12b side of the coil frame 12 in the same direction side, and the end portion 4g of the supporting piece 4d on the other hand is the flange portion of the coil frame 12.
When the end 4h of the other support piece 4e is engaged with and supported by the groove 21a provided on the body 21, the notch 12d provided in the 12b is engaged with the tips of the drive piece 4b and the pressed piece 4c. The spring 3d and the pressing piece 15b of the armature 15 are in contact with each other, and the hinge spring piece 4f spring-biases the outside of the bent portion of the armature 15.

Next, the operation will be described. When the coil 13 is excited, as shown in FIG.
The a is attracted to the tip 11a of the iron core 11 and hinge-supported by the hinge spring piece 4f of the card 4, so that it rotates about the hinge fulcrum shaft located inside the bent portion, and the pressing piece 15b moves to the card 4 The pressed piece 4c is pressed. Then the card
4 shows that both elastic support pieces 4d, 4e supported by the respective end portions 4g, 4h bend in the drive direction, that is, the direction toward the contact spring 3d, and the drive piece 4b presses the contact spring 3d. Then, the movable contact 3b provided on the contact spring 3d comes into contact with the fixed contact 3a. When the coil 13 is de-energized, the contact spring 3d
As shown in FIG. 1, the movable contact 3b is separated from the fixed contact 3a by its own spring property, and at the same time, the card 4 and the armature 15 are returned to their original states.

Next, a second embodiment of the present invention will be described below with reference to FIG. The members having substantially the same functions as those in the first embodiment are designated by the same reference numerals, and the configurations of the housing 2 and the card 4 different from those in the first embodiment will be described.

That is, the coil frame 12 and the body 21, which are a part of the housing 2, are used as engaging portions for engaging and supporting the end portions 4g and 4h of both supporting pieces 4d and 4e of the card 4 in the first embodiment. In contrast, the coil frame 12 is provided with a notch 12d and a groove 21a each having an engaging insertion opening that opens in the same direction when viewed from the flange portion 12b side, whereas in the present embodiment, in the first embodiment, In the direction orthogonal to the case, that is, when viewed from the side of the flange portion 12b of the coil frame 12, the engagement groove having the engagement insertion opening that opens in the same direction side
12e and 21b are provided so as to have a substantially triangular cross-sectional shape with the opening side narrowed.

Further, the card 4 has the end portions of both supporting pieces 4d and 4e.
4g and 4h are also formed in a substantially triangular convex shape in which the plate thickness direction is thicker toward the tip in accordance with the cross-sectional shape of the engaging grooves 12e and 21b. The card 4 is not provided with the hinge spring piece 4f in the first embodiment, but has a structure in which the hinge spring 16 is fixed to the yoke 14 as in the conventional example.

In such an electromagnetic relay, the card 4 made of insulating resin is used in both the first and second embodiments.
Are elastic support pieces 4d, 4 so that they can be bent in the driving direction.
The ends 4g and 4h of e are made of insulating resin instead of metal. 2 For details, see the flange 12b of the coil frame 12 and the body 21.
Since the end portions 4g and 4h are supported by, it is hard to wear due to the sliding of the same kind of material, and therefore, the abrasion powder that causes stable contact operation and contact contact failure, is generated.
It does not scatter to 3, and because the support piece is extended to both sides instead of one side, it will operate more stably.

Further, in both the first and second embodiments, the card 4 has the ends 4g and 4h of both supporting pieces 4d and 4e on the housing 2 and more specifically on the collar portion 12b and the body 21 of the coil frame 12. Both engaging parts provided, that is, the notch 12d and the groove 21 in the first embodiment.
In the second embodiment, it is easily slid and supported by both engaging portions only by being slid and inserted from the engaging insertion openings on the same direction side of the engaging grooves 12e and 21b.

Further, in the case of the first embodiment, if the card 4 is incorporated, the hinge spring piece 4f provided on the card 4 can rotatably support the armature 15 by hinges. It is not necessary to provide the hinge spring as a separate member.

Further, in the case of the second embodiment, since the engaging grooves 12e and 21b are formed so that the cross-sectional shape is narrower on the opening side, both the support pieces 4d and 4e of the card 4 have the end portions 4g and 4g. The convex portion of 4h does not get caught by the opening side portions of the engaging grooves 12e and 21b and does not come off, and the operation becomes more stable.

In each of the first and second embodiments, the card 4 is interposed between the electromagnet section 1 and the contact section 3 to improve the insulation performance between them. Second
In the case of the embodiment, the end portions 4g and 4h of both supporting pieces 4d and 4e are engaged with each other.
Since it is formed in a substantially triangular convex shape in conformity with the cross-sectional shape of 12e and 21b, it is different from the first embodiment formed in a flat plate shape in comparison with the electromagnet portion 1 via the end portions 4g, 4h and the contact point. Part 3
The insulation distance between and becomes large, further improving the insulation performance between them.

In both cases of the first and second embodiments, in the card 4, both supporting pieces 4d and 4e are the flange portion 1 of the coil frame 12.
2b and the body 21 are supported by engaging both engaging portions provided on the body 21, but it is difficult to assemble, but it may be fixedly supported by heat welding or the like. There is no need to worry about sliding or coming off.

[0038]

According to the first aspect of the present invention, in the card made of the insulating resin, the end portion of the elastic support piece is supported by the housing made of the insulating resin instead of the metal so that it can be bent in the driving direction. Therefore, the end is less likely to wear due to the sliding of the same kind of material, and therefore the operation is stable, and the abrasion powder that causes the contact contact failure is not scattered to the contact part. Since the support piece is extended to both sides instead of one side, more stable operation can be achieved.

Further, in addition to the effect of the first aspect, the second aspect of the present invention, in addition to the effect of the first aspect, allows the armature to be rotatably supported by the hinge by a hinge spring piece provided on the card. Therefore, it is not necessary to provide the hinge spring as a separate member.

According to the third aspect of the invention, in addition to the effect of the first aspect of the invention, in the card, the end portions of both supporting pieces are engaged with each other on the same direction side of both engaging portions provided in the housing. Only by slidably inserting from the insertion port, both engaging portions are easily engaged and supported.

Further, in addition to the effects of the third aspect, the card of the fourth aspect is such that, in the card, the convex-shaped end portions of both support pieces are engaged insertion openings of the engagement grooves of the housing. When it is slid and inserted, the engaging groove is formed such that the cross-sectional shape is narrowed on the opening side, so that the convex portion of the end portion is caught by the opening side portion of the engaging groove and cannot be removed.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a first embodiment of the present invention.

FIG. 2 is a front sectional view showing an operating state of the above.

FIG. 3 is an exploded perspective view showing a main part of the same.

FIG. 4 is a front sectional view showing a second embodiment of the present invention.

FIG. 5 is a front sectional view showing a conventional example.

[Explanation of symbols]

 1 Electromagnet part 12d Engagement part (notch) 12e Engagement part (engagement groove) 15 Armature 2 Housing 21a Engagement part (groove) 21b Engagement part (engagement groove) 3 Contact part 4 Card 4d One support piece 4e Other support piece 4f Hinge spring piece 4g One end of support piece 4h Other end of support piece

Claims (4)

[Claims] 1. An electromagnetic system comprising: an electromagnet portion, a contact portion, an insulating resin card that is driven by the electromagnet portion to drive the contact portion, and an insulating resin housing in which each member is disposed. In the relay, the card includes an elastic support piece having an end portion supported by the housing so as to be bent in a driving direction and extending on both sides. 2. The electromagnet section has an armature for moving the card, and a hinge spring piece for rotatably hinge-supporting the armature is provided on the card. 1. Electromagnetic relay according to 1. 3. The housing is characterized in that both engaging portions for engaging and supporting the end portions of the both supporting pieces are formed with engaging insertion openings on the same direction side. Item 1
Electromagnetic relay described. 4. The engagement portion is an engagement groove having a narrow cross-sectional shape on the opening side, and the end portion of the support piece is formed in a convex shape in accordance with the cross-sectional shape. The electromagnetic relay according to claim 3.