JPS63292535A - Electric switching device - Google Patents

Abstract

PURPOSE:To prevent a contact from abnormal wear and fusion deposition by forming two contact pieces from a clad plate made of a good electroconductive material and a magnetic material, and laying at least a part in parallel with one another in areas other than the contact installed part. CONSTITUTION:This contact mechanism consists of No.1 contact piece 53 and No.2 contact piece 54 made of a clad plate of good electroconductive material 51 and magnetic material 52. The No.1 contact piece 53 is equipped with a contact 55 at the tip while the No.2 contact piece 54 with a contact 56 at a point a little backmore from the tip, wherein the magnetic material 52 at the tip 54a of No.2 contact piece 54 is parallel to that portion of No.1 contact piece 53 mating therewith. In this contact mechanism current i produces a line of magnetic force phi, which passes the magnetic material 52 of the portion 53a of No.1 contact piece 53 and the magnetic material 52 at the tip 54a of No.2 contact piece 54 where no current flows, and electromagnetic attraction force is generated between the magnetic materials 52, 52 of the two parts 53a, 54a. This suppresses electromagnetic repulsion and separation of the contacts when excessive current is passing. Thus the contacts are prevented from abnormal exhaust and fusion deposition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to electrical switching devices such as relays, switches, and timers.

[Conventional technology]

Figures 10 and 1) show a conventional remote control relay. As shown in the figure, this relay is
Bodies 1 that are fixed to each other with pins 3, etc.
and has cover 2. In the center of the body 1, there is an electromagnetic device 4.
A movable body (plunger) 5 driven by an electromagnet device 4 is also disposed.

The electromagnet device 4 has a coil frame 6° made of an insulating material, two permanent magnets 7, two L-shaped magnet yokes 8, and two U-shaped yokes 9. The coil frame 6 has a cylindrical coil attachment part 6a and four support parts 6b provided on both ends of the attachment part 6a. A bottle fixing piece 6e with a hole 6d projects forward from two support parts 6b, 6b provided on both sides of the front end of the attachment part 6a. A conductive wire is wound around the attachment portion 6a to form a coil 10.

The movable body 5 has armatures 1) a and llb fixed on both sides,
A shaft hole 5a is provided in the front part. The movable body 5 has an intermediate portion inserted into a mounting portion 6a of the coil frame, so that it can move forward and backward.

A support plate 12 is fixed on top of the electromagnet device 4.

The support plate 12 has a printed circuit board 13. Terminal board 14.15
are each fixed. 2 fixed to the support plate 12
The contact plates 19a and 19b and the support plate 2 of the contact spring part 20
Each base of 0a passes through the support 12 and connects to the printed circuit board 13.
It is connected to the. contact spring 20b of contact spring part 20;
20c urges each contact 22... to be pressed against the contacts 21, 21 of the contact plates 19a, 19b facing each other. A presser plate 24 is fixed to each of the terminal plates 14 and 15 by a presser screw 23.

A rocking body 25 is arranged on the side of the electromagnet device 4.

The rocking body 25 has a manual operation part 26 at its upper end and an actuator part 2 which protrudes inward on a surface facing inward below it.
7, each having a shaft hole 28 in the middle part and a recess 29 having a downward opening 29a in the outward facing surface. A U-shaped groove 30 with a shaft hole is provided on the inner surface of the lower end, and a convex portion 31 is provided on the outer surface. A support portion 32 consisting of a round protruding portion is provided on the upper part of the inner wall surface of the inner wall of the recess 29, and support portions 33 consisting of low protrusions are provided on both sides of the convex portion 31, respectively.

The oscillating body 25 has a shaft hole 28 formed in both shaft holes 5d and 5 of the coil frame 6.
A bottle 34 is passed through the coil frame 6 along with d, and is fixed to the coil frame 6 so as to be able to swing forward and backward. The tip of the movable body 5 is inserted into the groove 30, and the pin 35 is passed through the shaft hole 5a of the movable body and the shaft hole of the groove 30, so that the movable body 5 is pivotally fixed to the rocking body 25. By moving the movable body 5 forward and backward, the rocking body 25 can be rocked forward and backward. A contact pressure spring 36 is arranged on the inner wall surface of the outer side wall of the recess 29, and this contact pressure spring 36 extends from the opening 29a to the recess 2.
The base of the plate-shaped contact 37 inserted into the oscillator 9 is pushed toward the rocking body (inward). The contact 37 has a hole 37a in the center.
, has a contact 38 and an electromagnetic iron piece 39 at the tip, and the convex part 31 of the oscillator 25 is inserted into the hole 37a, and the oscillator is arranged so that the back side of the base faces the support part 32 and the back side of the center part faces the support part 33. It is detachably supported by the moving body 25. When the tip of the contact 37 is pushed inward, it comes into contact with a stopper 1b provided at a position on the inside of the body 1 on the back side of the contact 38. The manual operation part 26 of the rocking body is a notch 1a provided in the wall of the body 1.
I'm looking out more.

On the outside of the rocking body 25, a contactor with a terminal 41. The terminal 42 is fixed and the contact 41
．． A press plate 24 is fixed to the upper end surface of each terminal 42 by a press screw 23. The contactor 41 has a U-shaped portion 41a at its lower end, and a contact 43 is fixed to the outer surface of the tip of the U-shaped portion 41a. The contact 43 faces the contact 38 of the contactor 37. U-shaped part 4
An electromagnetic iron piece 44 having a U-shaped portion is fixed to the base of the U-shaped portion a such that a U-shaped portion 41a is inserted into the U-shaped portion. The terminal 42 and the base of the contactor 370 are made of braided copper wire 45
electrically connected.

In the figure, 47 is a buffer spring, and 48 is a blind plate.

In this relay, when the movable body 5 is moved forward by the electromagnetic device 4, the oscillating body 25 rotates clockwise in the figure, and the contact 38 of the contact 37 is pressed against the contact 43 of the contact 41. After a delay, the actuator section 27 connects the contact 21 of the contact plate 19b and the contact 22 of the contact spring 20c.
22 are separated from each other. In addition, contact pressure spring 3
When the movable body 5 is moved backward by the electromagnetic device 6 and the electromagnet device 4, the oscillating body 25 rotates counterclockwise in the figure and the contactor 3
7 is separated from the contact 43 of the contactor 41, and a little later, the actuator section 27 moves the contact plate 19a.
The contact 37.41, in which the contact 21 of the contact spring 20b- and the contact 22.22 of the contact spring 20b- are separated, constitutes a contact mechanism, and these include an electromagnetic iron piece 39.44.
is provided. This uses electromagnetic attraction to suppress electromagnetic opening of the contacts when excessive currents such as short-circuit fault currents and inrush currents from capacitor loads and lamp loads pass through.
This is to prevent abnormal wear and welding of the contacts.

[Problem that the invention seeks to solve]

However, since the contact mechanism in the conventional remote control relay is equipped with an electromagnetic iron piece, the number of parts increases, and in addition, processes such as caulking and welding are required to fix the electromagnetic iron piece, which requires assembly and processing. There was a problem that the number of steps would increase.

[Means for solving problems]

In order to solve the above-mentioned problems, an electric switchgear according to the present invention has a contact mechanism in which two contacts are made of a clad plate made of a highly conductive material and a magnetic material, and at least one of the contacts is made of a clad plate made of a highly conductive material and a magnetic material. The parts are parallel to each other.

[For production]

The electrical switching device according to the present invention suppresses the electromagnetic repulsion opening of the contacts when an excessive current passes through them by electromagnetic attraction generated between the magnetic materials in the parallel portions of the two contacts.

〔Example〕

Figures 1fa) and 1fbl show a first embodiment of a contact mechanism in an electrical switchgear according to the present invention.

As shown in the figure, this contact mechanism includes a first contact 53 and a second contact 54 made of a clad plate made of a highly conductive material 51 and a magnetic material 52. Examples of good conductive materials include copper, copper alloys, aluminum, aluminum alloys, etc., and examples of magnetic materials include iron, nickel, etc.

The clad plate is preferably made of a combination of copper and iron. The first contact 53 is provided with a contact 55 at its tip, and the second contact 54 is provided with a contact 56 at a position slightly further back from the tip. Both contacts 53 and 54 extend from opposite directions and are arranged so that their tips are opposite to each other. The magnetic material 52 of the tip portion 54a of the second contact 54 and the portion 5 of the first contact 53 facing this
3a is parallel. The magnetic material 52 of the first contact 53 is provided on the side opposite to the second contact 54, and the magnetic material 52 of the second contact 54 is provided on the side of the first contact 53. The contacts 55, 56 are connected to the feet 5 provided on these
5a and 56a are passed through through holes (not shown) provided in the first contact 53 and the second contact 54, and then their tips are caulked and fixed.

In this contact mechanism, when a current i flows as shown by the arrow in FIG. 1(a), the current flows through the second contact 54 as shown in FIG. 1(b). No tip part 54
A line of magnetic force φ is generated that passes through the magnetic material 52 of a and the magnetic material 52 of the portion 53a of the first contact 53, and the image portions 53a, 5
An electromagnetic attractive force is generated between the magnetic materials 52 and 52 of 4a. Therefore, the electromagnetic repulsion opening of the contacts is suppressed when an excessive current passes through them. Therefore, this contact mechanism can prevent abnormal wear and welding of the contacts without providing an electromagnetic iron piece as a separate component, and has a simple structure. In addition, the number of parts is reduced, and the assembly and processing steps are also reduced.

In addition, in the above embodiment, the magnetic material of the first contact is provided on the side opposite to the second contact, and the magnetic material of the second contact is provided on the first contact side, but this is not necessarily the case. It doesn't have to be this way. The contacts are caulked, but this does not necessarily have to be the case. However, if the contact is provided on the side of the magnetic material, it is preferable to caulk it. This is because the legs of the contacts come into contact with the highly conductive material, improving electrical continuity between both contacts.

FIGS. 2A and 2B show a second embodiment of the contact mechanism in the electrical switchgear according to the present invention.

In this contact mechanism, the magnetic material 52 of the second contact 54 is
Contacts 55 and 56 are provided on the side opposite to the contact 53 and are fixed to both contacts 53 and 544 by welding.

The rest is the same as the first embodiment. Therefore, in the figure, the numbers common to those in Figure 1 (屹fb) are
It refers to two parts of the same member.

This embodiment also provides the same effects as the first embodiment.

When the contacts are provided on the conductive material side as in this embodiment, electrical continuity between both contacts is good even if the contacts are fixed by welding.

FIGS. 3A and 3B show a third embodiment of a contact mechanism in an electrical switchgear according to the present invention.

In this contact mechanism, wing pieces 53b are provided by bending on both sides of a portion 53a of the first contact 53 facing the tip portion 54a of the second contact 54, the tips of which extend toward the second contact 54. , a portion 53a of the first contact 53
The longitudinal section at the position is U-shaped. The rest is the same as the first embodiment. Therefore, in the figures, the numbers common to FIGS. 1(a) and (bl) refer to the same two parts.

In this embodiment as well, the same effects as in the first embodiment can be obtained, but the wing pieces 53b as described above are provided on the first contactor 53, and the magnetic material 52 of the wing pieces 53b and the second contact Since the spacing between the magnetic materials 52 of the child 54 is narrow, the image portion 53a.

The electromagnetic attractive force generated between the magnetic materials 52 and 52 of 54a becomes large, and the effect of suppressing electromagnetic repulsion separation becomes large.

FIG. 4 shows a fourth embodiment of the contact mechanism according to the present invention. In this contact mechanism, the magnetic material 52 of the first contact 53 is provided on the second contact 54 side. The rest is the same as the first embodiment. Therefore, in the figure, FIG. 1(a).

Numbers common to those in (b) refer to one part of the same member.

This embodiment also provides the same effects as the first embodiment.

FIG. 5 shows a remote control relay using a fifth embodiment of the contact mechanism in an electrical switchgear according to the present invention. This contact mechanism includes a first contact 53 having a terminal portion at the upper end and a U-shape at the lower end, and a second contact 54 detachably supported by the rocking body 25. The U-shaped tip portion of the first contact 53 and the lower end portion of the second contact 54 are as shown in FIG. Therefore, this embodiment also provides the same effects as the first embodiment. In the figure, Figure 3 (at, fbl, 10th
Numbers common to those in FIG. 1 and FIG. 1) indicate the same parts.

FIGS. 6A and 6B show a sixth embodiment of a contact mechanism in an electrical switchgear according to the present invention.

As shown in the figure, this contact mechanism also includes a first contact 53 and a second contact 54 made of a clad plate made of a highly conductive material 51 and a magnetic material 52. The first contact 53 and the second contact 54 are provided with contacts 55 and 56 at their tips. Both contacts 53 and 54 are arranged in parallel with their tips facing in the same direction and with their contacts 55 and 56 facing each other. The magnetic material 52 of the first contact 53 is
The magnetic material 52 of the second contact 54 is provided on the side opposite to the first contact 53 .

The contact points 55, 56 are connected to the legs 55a, 56 provided thereon.
After a is passed through a through hole (not shown) provided in the first contact 53 and the second contact 54, its tip is caulked to be fixed.

In this contact mechanism, current i flows in opposite directions between the first contact 53 and the second contact 54, as indicated by arrows in FIG. 6fal.

When the current i flows, as shown in FIG. 6(b), magnetic force lines φ passing through the magnetic material 52 of the first contact 53 and the magnetic material 52 of the second contact 54 and the second contact child 54
A line of magnetic force φ′ passing only through the magnetic material 52 is generated, and the line of magnetic force φ
Due to the occurrence of magnetic material 52,52 of both contacts 53,54
An electromagnetic attractive force is generated between the two. Therefore, the electromagnetic repulsion opening of the contacts is suppressed when an excessive current passes through them. Therefore, this contact mechanism can also prevent abnormal wear and welding of the contacts without providing the electromagnetic iron piece as a separate component, and has a simple structure. In addition, the number of parts is reduced, and the assembly and processing steps are also reduced.

Figures 7 (al and bl) show a seventh embodiment of the contact mechanism in the electrical switchgear according to the present invention.

In this contact mechanism, wing pieces 53b whose tips are directed toward the second contact 54 are provided on both sides of the base side from the contact 55 of the first contact 53. 53
b The longitudinal section at the installation position is U-shaped. The rest is the same as the sixth embodiment. Therefore, in the drawings, the numbers common to FIGS. 6 (al, (bl) refer to two parts of the same member.

In this embodiment as well, the same effects as in the sixth embodiment can be obtained, but the wing pieces 53b as described above are provided on the first contact 53, and the magnetic material 52 of the wing pieces 53b and the second contact Since the spacing between the magnetic materials 52 of the contacts 53 and 54 is narrow, the electromagnetic attractive force generated between the magnetic materials 52 and 52 of the contacts 53 and 54 becomes large, and the effect of suppressing electromagnetic repulsion separation becomes large. It has become.

FIG. 8 shows an eighth embodiment of a contact mechanism in an electrical switchgear according to the present invention. This contact mechanism
The tip of the contact 54 is folded back into a U-shape, and a contact 56 is fixed to the tip of the folded portion by welding, and a contact 55 is fixed to the tip of the first contact 53 by welding.

The rest is the same as the sixth embodiment. Therefore, in the drawings, the numbers common to those in FIG. 6 (al, (bl) refer to the same three parts.

This embodiment also provides the same effects as the sixth embodiment. Note that even if the conductive material of one contact is directed to the opposite side of the other contact, if the tip is folded back and a contact is provided at the tip, good conductivity can be achieved by welding. It becomes possible to fix contacts directly to the material.

FIG. 9 shows a remote control relay using a ninth embodiment of the contact mechanism in an electrical switchgear according to the present invention. This contact mechanism includes a first contact 53 having a terminal portion at the upper end and a hook-shaped lower end, and a second contact 54 detachably supported by the rocking body 25. 1st
The hook-shaped tip portion of the contactor 53 and the lower end portion of the second contactor 54 are as shown in FIG. Therefore, this embodiment also provides the same effects as the sixth embodiment. In the drawings, the numbers common to those in FIGS. 6 fa), (b), FIGS. 10 and 1) are the same members.

It shows the parts. Note that the contact mechanism according to the present invention is not limited to being provided in a remote control relay, and may be provided in other electrical switching devices such as a switch and a timer. Furthermore, the opening and closing of the contact mechanism is not limited to being performed by electromagnetic means;
It may be performed by thermally responsive means or the like.

〔Effect of the invention〕

As explained above, the electrical switchgear according to the present invention is an electrical switchgear in which two contacts having contacts are arranged in a contact mechanism so that the contacts face each other, The two contacts are made of clad plates made of a highly conductive material and a magnetic material, and at least a part of them is parallel to each other except for the contact installation area, so there is no need to provide an electromagnetic iron piece as a separate member.
Abnormal wear and welding of contacts can be prevented, the structure is simple, the number of parts is small, and assembly and processing steps are also reduced.

[Brief explanation of the drawing]

FIG. 1 (81 is a front view of the vicinity of the contact part of the first embodiment of the contact mechanism in the electrical switchgear according to the present invention;
b) is a longitudinal cross-sectional view of the same embodiment, FIG. A vertical cross-sectional view, FIG. FIG. 5 is a front view of the vicinity of the contact portion of the fourth embodiment of the contact mechanism in the electrical switchgear according to the present invention, and FIG. 5 shows a remote control relay in which the fifth embodiment of the contact mechanism in the electrical switchgear according to the present invention is used. A partially cutaway front view, FIG. 6(a) shows the sixth contact mechanism in the electrical switchgear according to the present invention.
A front view of the vicinity of the contact portion of the embodiment, the same figure (bl is a vertical cross-sectional view of the same embodiment, and Fig. 7 fa) is a front view of the vicinity of the contact portion of the seventh embodiment of the contact mechanism in the electrical switching device according to the present invention. Fig. 8(b) is a longitudinal sectional view of the same embodiment, Fig. 8 is a front view of the vicinity of the contact portion of the eighth embodiment of the contact mechanism in the electrical switchgear according to the present invention, and Fig. 9 is a longitudinal sectional view of the same embodiment. Partially cutaway front view of a remote control relay using the ninth embodiment of the contact mechanism in such an electric switchgear, Part 1
Figure 0 is a partially cutaway front view of a conventional remote control relay, and Figure 1) is an exploded perspective view of the same remote control relay. 51... Good conductive material 52... Magnetic material 53...
・First contact 54...Second contact 55.56...
・Contact agent Patent attorney Takehiko Matsumoto Procedural amendment (Spontaneous July 28, 1986, Conflict No. 129201 No. 2, Name of invention Electric switchgear 3, Relationship with the case of the person making the amendment Patent application Address 1048 Oaza Kadoma, Kadoma City, Osaka Name (583) Representative Matsushita Electric Works Co., Ltd. ((Jim Emperor Sadao Fujii 4, agent 6, subject to amendment P62-1292
01 Specification and Drawing 7, Contents of Amendment ■ The full text of the claims in the specification is corrected as follows. Item 1 - "(1) In a contact mechanism, an electrical switchgear in which two contacts having contacts are arranged with their contacts facing each other, and the two contacts are An electrical switch comprising a clad plate made of a conductive material and a magnetic material, at least a part of which is parallel to each other except for the contact installation part, and is parallel to each other in a 1-length round board LL!E. Device. (2) The two contacts extend from opposite directions and are arranged so that their tips face each other, with one contact having a contact point at the tip, and the other contact having a contact point at the tip. The electrical switch according to claim 1, wherein the contact is provided at a position slightly closer to the base than the tip, and the portion beyond the contact is parallel to the portion of the one contact on the base side from the contact. Device. (3) According to claim 1 or 2, wing pieces extending toward the other contact are formed on both sides of a portion of at least one contact that is parallel to the other contact. ■ On page 8, line 4 of the specification, between ``parallel'' and ``are made to do so. Insert "allowing current to flow and directing the magnetic material outward." ■ On page 9, line 10 of the specification, between “are” and “the contacts 55 and 56 are
A current i flows through the contactor 54 as shown in the figure, and a portion 53a of the first contactor 53 allows the current to flow therethrough, and the magnetic material 52 is directed outward. ” is inserted. ■ In line 1) on page 10 of the specification, between "," and "necessarily", there is a statement that says, "In the parallel portions of both contacts, at least one contact is adapted to allow current to flow and is made of magnetic material." If it is directed outward, insert ". ■ The statement "Fig. 4 provides the effects of this invention" on page 12, lines 10 to 18 of the specification is corrected as follows. - In the contact mechanism shown in FIG. 4, the magnetic material 52 of the first contact 53 is provided on the second contact 54 side. The rest is the same as the first embodiment. However, in this contact mechanism, since the magnetic materials 52 of the first contact 53 and the second contact 54 are both directed inward, no electromagnetic attractive force is generated between the two magnetic materials 52, 52. The effect of suppressing electromagnetic repulsion dissociation cannot be obtained ■ In the specification, page 16, line 18, and page 19, line 9, "9th embodiment" is replaced with "4th embodiment". ” he corrected. ■ In the second line of page 18 of the specification, the phrase "parallel" is replaced by "parallel, and in the parallel portion, at least one contact is configured to allow current to flow, and The magnetic material is facing outward.'' ■ On page 18 of the specification, lines 16 to 17, the phrase "Fourth embodiment according to the present invention" is corrected to read "a contact mechanism that cannot obtain the effect of suppressing electromagnetic repulsion and opening." . ■ In the attached drawings, Figure 9, Figure 1O, and Figure 1) are corrected as shown in the attached sheet.

Claims (3)

[Claims] (1) In a contact mechanism, an electrical switchgear in which two contacts having contacts are arranged with their contacts facing each other, and the two contacts are made of a highly conductive material and a magnetic material. An electrical switchgear comprising a clad plate made of a material and having at least a portion parallel to each other except for the contact installation portion. (2) The two contacts extend from opposite directions and are arranged so that their tips face each other, with one contact having a contact point at the tip, and the other contact having a contact point. 2. The electrical switching device according to claim 1, wherein the electrical switching device is provided at a position slightly toward the base side from the tip, and a portion beyond the contact point is parallel to a portion of the one contactor toward the base side from the contact point. (3) The electricity according to claim 1 or 2, wherein wing pieces extending toward the other contact are formed on both sides of a portion of at least one contact that is parallel to the other contact. Switchgear.