JPS6255815A - Switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to electrical switches in the sense of including electrical circuit breakers and the like. In particular, the present invention is directed to a switch [S@4. Ivl.

Known switches are designed to allow arcs to pass through them7.
through a conical arc chamber.

It is considered that the arc will fly between the contacts.

However, it is known that the arc's path can be influenced by the presence of ferromagnetic materials, such as the metal case of the switch.

In such cases, the arc jumps to the sides of the contact, resulting in uneven erosion of the contact. Furthermore, in this case, the duration of the arc is relatively longer than when the arc flies straight between the contacts. This causes current to continue to flow for a while after the switch is activated. ←−
→4÷→→4! It is further known that arcs passing through adjacent conductive paths in a multipole or multiphase switch are attracted to or repelled from each other by the polarity or phase shift of the magnetic field produced by the current flowing through the arc. This attraction or repulsion is also known in the art, in which one of the contacts is in the form of a plurality of divided fingers. This allows even if one or more fingers become severely eroded, good electrical contact can still be obtained due to the good contact of the other fingers. However, the problem that the arc sometimes drips towards the outer casing of the switch still affects the performance of the switch.

[Purpose of the invention]

It is an object of the present invention to provide an electrical switch that at least partially overcomes the aforementioned disadvantages.

Measures to solve problem C] To this end, the present invention provides the following switch.

It is a switch having a first and a second contact,
the first and second contacts have substantially rectangular contact areas, and at least one of the contacts has a closed circuit position in which the contact is in electrical contact with the other contact; is movable relative to the other contact between an open circuit position in which this contact is spaced from the other contact such that no fluid flows between the first and second contacts; Each contact area comprises a plurality of contact sites separated by multiple arc anchoring zones applied to create a strong electric field strength) when the contact is separated from the first contact. each of the contact regions of the second contact is disposed substantially simultaneously away from the contact region of the second contact, and the arc anchorage region is configured to support the arc when an arc is generated between the contacts. This makes it easier to fly θ along a number of paths between both contacts.

By generating multiple arcs, mutual attraction is created between the arcs.

Because each arc attracts each other, it is less prone to be influenced by external forces such as external forces due to the ferromagnetic material surrounding the contact.

Preferably, the arc anchoring regions extend longitudinally and parallel to each other relative to the contact region.

A contact area of the contact that at least one of the contacts has,
It is advantageous to have a plurality of separate element parts with breaks between them forming arc fixation zones of high field strength. In an advantageous arrangement, the contact area of the at least one contact has finger-like sections that are substantially parallel to each other with a gap between them.

As an alternative to the above, one or more of the arc anchoring areas may be provided by a protrusion projecting from the surface of the contact. A bottle, stud, or rivet may be used to form a sharp edge protruding from the contact.

In another device, one or more arc anchoring areas are provided by holes or depressions in the surface of the contact. One of the contacts has one or more protrusions, the other contact has one or more holes or recesses, and the one or more protrusions are in contact with the one when the contact is in the closing position. It is possible to imagine a device that can fit into more than one hole.

According to another aspect of the present invention, the following switch is provided. It is a switch including a first and a second contact, at least one of which is in a closed position in which it is in electrical contact with the other contact, and in which current flows between both contacts. between an open circuit position in which this contact is separated from the other contact so that no flow occurs between the contacts, and the first and second contacts are movable relative to the other contact; , each comprising a plurality of contact sites separated by a number of arc anchorage zones applied to produce a strong electric field strength), the arc anchorage zones extending longitudinally parallel to each other from the contact. , when the contact leaves the first
each contact region of the contact is arranged to be substantially simultaneously spaced apart from the contact region of the second contact, and
The arc anchorage zone is such that when an arc occurs across the contacts, it tends to travel along multiple paths between the contacts.

The invention further relates to a pair of contacts for a switch. The contacts are adapted to produce a strong electric field strength such that when an arc is generated between the contacts when they are separated, this arc tends to travel along multiple paths between the contacts. each having a plurality of contact sites separated by a number of arc anchoring areas.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to embodiments of the accompanying drawings.

1 is a schematic perspective view of the contact of a switch according to the invention in the closed position; FIG. 2 is a perspective view of the contact of FIG. 1 in the open position; and FIG. 2 is a schematic illustration of a pair of contacts according to another embodiment of the invention.

This will be explained with reference to FIG. The stationary contact, generally designated 1, is made up of a base 2 and a contact part 3, which are separated by a bent part 24.

The contact part 3 has a gap 4.degree. 5 cut into it at its free end K so as to form three fingers 7. This gap 4.5 extends only partially along the length of the contact portion 3, leaving a solid portion 8 in the vicinity of the bend 24.

A movable contact 9 rests on the fixed contact 1 at the contact area 8, which contact 9 can be moved by a piece schematically indicated at 50, a biasing means. This movable contact includes three finger elements 10, 11° 12, these elements are:
They are closely aligned with a slight air gap 13, 14 between them. When the switch is in the closed position as in FIG. 1, current flows between contacts 1 and 9.

When the switch is moved to the open position, the movable contact 9
is lifted from the contact area 8 as shown in FIG. If a relatively large current is interrupted, the arc
and 9. This arc has a shape as shown in 15 between the ridgeline of the finger element in the gap 13 and 14 and the ridgeline of the finger 7 in the gap 4 and 5.

In this way, at least two essentially parallel arcs are formed which, due to mutual attraction,
There is a billionth chance of preventing it from deviating to the side of the contact point.

Referring to FIG. 3, the fixed contact 1 and the movable contact 9 are shown as before, but the contact in FIG. There are no elements. The fixed contact 1 has three contact areas 52, 53 .
Two rows of holes 51 are provided so as to divide the hole into 54 holes. The movable contact 9 has three contact areas 5.
Protrusions 5 lined up in two rows so as to divide into 6.5' and 7.58.
5 is provided. The protrusions 55 and holes 51 are arranged so that when the switch is in the closed position, the movable and fixed contacts thereof engage each other and each protrusion fits into its respective hole.

When the contact opens, an arc tends to occur, and this arc 15 is formed between the protrusion 55 and the corresponding hole 51. As in the previous case, substantially parallel arcs are formed originating from sharp edges constituting a zone of strong field strength. This arc is prevented from wandering to the side of the contact due to mutual attraction.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view of the contact of the switch according to the present invention when the contact is in the closed position, and FIG. 2 is a perspective view of the contact shown in FIG. 1 when the contact is in the open position. , FIG. 3 is a schematic diagram of a pair of contacts according to another embodiment of the invention. 1...Fixed contact, 2...Base, 3
...Contact part, 4, 5...Gap, 7...
...Finger, 8...Contact area, 9.
...Movable contact, 10.11.12...Finger element, 13.14.
... air gap, 15 ... arc, 50 ... biasing means, 51 ... hole, 52.53.54 ...
...Contact part (of fixed contact), 55...Protrusion, 56.57, 5.8...Contact part (of movable contact).

Claims (1)

[Scope of Claims] 1. A switch having first and second contacts (1) and (9), wherein the first and second contacts each have a contact area; at least one of (9) is a closed circuit position in which this contact is in electrical contact with another contact, and an open circuit position in which this contact is separated from other contacts so that no current flows between them. the contact area of each of the first and second contacts is movable between positions relative to the other contact (1), and the contact area of each of the first and second contacts has a large number of electrical fields applied to produce a strong electric field strength. Arc anchorage areas (4, 5, 13, 14, and 5
a plurality of contact sites (7, 1, 55) separated by
0, 11, 12, and 52, 53, 54, 56, 57,
58), and when the contact is removed, the contact
Each contact part (7 and 52, 53,
54) is the contact part (10, 11, 12,
and 56, 57, 58), wherein the contact area is substantially rectangular and the arc anchorage area is disposed of when the arc is generated across both contacts. , a switch characterized in that the arc is made to tend to travel along a number of paths between both contacts. 2. The switch of claim 1, wherein said arc anchoring areas extend longitudinally parallel to each other along said contact area. 3. The contact area of at least one of the contacts (1 and 9) has a plurality of separate element parts (7 and 10, 11, 1
The switch according to claim 1 or 2, comprising a contact portion (2) and portions (4, 5, and 13, 14) that constitute an arc anchoring region with a strong electric field strength therebetween. 4. The contact area of at least one contact has finger-like portions (7) substantially parallel to each other with a gap (4 and 5) between them. switch. 5. Any one of claims 1 to 4, wherein at least one of the contacts has a protrusion (55) projecting from the surface of the contact. Switch listed. 6. One or more arc anchoring areas of at least one of the contacts are comprised of holes or recesses on the surface of the contact.
A switch according to any one of claims 1 to 5. 7. One of the contacts (9) is provided with one or more protrusions (55), and the other contact (1) is provided with one or more holes or recesses, the arrangement of which 7. The switch of claims 5 and 6, wherein the one or more projections are adapted to fit into the one or more holes or recesses when the contact is in the closed position. 8. A switch having first and second contacts (1) and (9), wherein the first and second contacts each have a contact area, and at least one of the contacts (9) ) between the closed position, where this contact is in electrical contact with other contacts, and the open position, where this contact is separated from the other contacts so that no current flows between them. , the other contact (1
), and the first and second contacts are arranged in a number of arc anchoring zones (4, 5, 13, 14, and 51, 55) applied to create a strong electric field strength. A plurality of contact points (7, 10, 11, 12
, and 52, 53, 54, 56, 57, 58), respectively, wherein the arc anchoring regions extend parallel to each other in the longitudinal direction of the contact, and the contact , each contact portion (7 and 52, 53 of the first contactor (1)
, 54) are the contact parts (10, 11, 12) of the second contact
, and 56, 57, 58), and the arc anchoring region is arranged to be substantially simultaneously spaced apart from the contacts 56, 57, 58), and the arc anchoring region is arranged to move the arc across the contacts as the arc is generated across the contacts. A switch characterized in that it facilitates flight along a number of paths between. 9. Multiple contact sites (7, 10, 11, 12) separated by multiple arc anchoring zones (4, 5, 13, 14, and 51, 55) applied to create a strong electric field strength.
, and 52, 53, 54, 56, 57, 58), respectively, which contacts each of the first contact (1) when it leaves. The contact parts (7 and 52, 53, 54) are the second contact (9)
contact parts (10, 11, 12, and 56, 57, 58
) are configured to be substantially simultaneously separated from the
and the arc anchoring region is configured to facilitate the arc to travel along multiple paths between the contacts when the contacts are separated and an arc is generated between the contacts.
A pair of contacts of a switch according to claim 8, wherein the contacts extend parallel to each other in the longitudinal direction of the contacts. 10, the contacts (1) and (9) each having a contact area;
), but multiple contact sites (7, 10, 11, 1
2; ) is the second
The contact parts (10, 11, 12, and 5
6, 57, 58), the contact area is substantially rectangular, and the arc anchorage area is configured to displace the arc across both contacts. occurs, the arc tends to travel along multiple paths between the two contacts,
A pair of contacts of a switch according to any one of claims 1 to 7.