CN1050686C - High effective on-off contact group for electrical appliances - Google Patents
High effective on-off contact group for electrical appliances Download PDFInfo
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- CN1050686C CN1050686C CN95118200A CN95118200A CN1050686C CN 1050686 C CN1050686 C CN 1050686C CN 95118200 A CN95118200 A CN 95118200A CN 95118200 A CN95118200 A CN 95118200A CN 1050686 C CN1050686 C CN 1050686C
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- contact
- electrical equipment
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- soft
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Abstract
The present invention discloses an efficient electric appliance on-off contact set suitable for a fuse, a relay, a magnetic starter, an air circuit breaker, a switch, a switch blade, etc. two corresponding contacts are composed of a soft contact and a hard contact. The surface of the hard contact is in a shape of a cambered surface with multiple recesses and projections; the soft contact is made of multi-hole layer metal, and electrical contact surface lubrication protecting agents are filled in gaps of hole layers. Because the electrical contact surface lubrication protecting agents in the gaps of the multi-hole layer metal has the function of overcoming oxide, dust, etc. on the surface of the contact, the present invention has the effects of enlarging the contact surface area, saving materials and extending the service life of the contacts.
Description
The present invention relates to a kind of electrical equipment make break contact group.Be applicable to that fuse, relay, magnetic starter, air circuit, connector assembly, switch, plug-in strip etc. are on the contact sets of break-make protector or controller spare of dielectric with the air.
Its structure majority of electrical equipment make break contact group that available circuit meets connection, shutoff, control guarantor place is that corresponding bright and clean cambered surface of real core or plane form point, line, surface, contact, its material mostly is pure Ag or Ag alloy, powder metallurgy, or ordinary copper or copper alloy surface are coated with noble metal.In order to maximally utilise slider material, the someone proposes the hollow contact and replaces real core contact.The electrical equipment make break contact group that with the air is medium is a connecting and disconnecting of the circuit setting, and when electrical equipment make break contact action → closure, two contacts (bright and clean cambered surface or plane) connects connection; During unlatching → two contact separation.Under the circuit no-load condition, only show as Static Contact resistance between two contacts, when contact sets is born the big load current of circuit, the surge current that closure is brought, the back electromotive force that unlatching brings all impacts the contact surface of contact sets correspondence, thereby the contact sets part very easily produces thermal effect, contact sets work under bad environment---acid in addition, alkali, salt fog, greasy dirt, pollutions such as dust, contact surface is difficult to remain the favorable conductive smooth surface, add the added clossing pressure in contact and will cause spring, inevitablely during the contact spring gap occur between two contacts, have at circuit that this spring gap will cause electric arc under the carrier strip spare, the high temperature that this electric arc produces can make the contact surface oxidation, local galvanic corrosion, very the person produces welding.Because existing technology can't overcome this phenomenon, so, as long as the once oxidation spot occurs between the contact sets, the gap just appears between the contact sets, and this gap does not remove, and vicious circle occurs.
The objective of the invention is to improve with the air is the effective contact area of electrical equipment make break contact group of dielectric, reduces the contact spring, thereby reaches the purpose that improves load-carrying ability under the contact cooling condition.
The objective of the invention is to finish as follows: the contact sets by one group of correspondence is formed.Two contacts one are real core metal " firmly " contact, and another contact is porous layer metal " soft " contact.
Real core metal " firmly " contact of a kind of electrical equipment make break contact of the present invention group is that processing makes its surface be " how concavo-convex cambered surface " or " pitted skin " through machinery or chemical method, surface treated now the identical physical dimension of technology and surface area with tens of times of expansions.For surface area and another contact that real core metal " firmly " contact is enlarged coincide, another corresponding contact adopts special " porous layer metal " to make " soft " contact.So the contact sets of forming has guaranteed that the surface area that " how concavo-convex cambered surface " or " pitted skin " real core metal " firmly " contact enlarge is able to effective execution, thereby reaches the purpose that improves load.
The porous layer metal that a kind of electrical equipment make break contact of the present invention group is adopted be by electrochemical method with Ag or different types of Ag alloy as Ag-Cu; Ag-Ni; Ag-Meo; Ag-Sno2; Ag-2Cu etc. are coated on formation " sponge shape metal " on the spongy organic substance and get, and also can adopt above-mentioned Ag or superimposed the making of Ag alloying metal net, and other adopts elasticity porous metals and wire netting to inlay also can make " soft " contact.Its material consumption of " soft " contact of so making is compared with real core and is saved significantly.For raising " soft ", " firmly " contact contact effect can be injected " electrical contact surface lubricating and protecting agent " in the porous layer metal.Inject the contact of " electrical contact surface lubricating and protecting agent " and can further improve conduction, cooling, anti-oxidation antidusting dust effect.A kind of electrical equipment make break contact group is applied to electromagnetic device, as the low tension switch element, the low tension switch contact system, low tension switch rolling contact system, during the contact system of lv contactor, because the quality of moving contact only accounts for 1/30～1/20 of prior art, theory analysis points out that the maximum amplitude of the mechanical springing that produces during the closing of contact and spring number of times are directly proportional with the quality power of moving contact.Proof thus, the opportunity that adopts electromagnetic device contact sets of the present invention to produce electric arc and galvanic corrosion will obviously descend, and contact sets useful life is with corresponding prolongation.
It is particularly remarkable to anti-oxidant dustproof dust effect that a kind of electrical equipment make break contact of the present invention group is injected " electrical contact surface lubricating and protecting agent " back.The contact surface of prior art be difficult to keep the favorable conductive face, in ecological deterioration---acid, alkali, salt fog sump oil condition lower contact surperficial oxidized be inevitable.Contact sets of the present invention surface is owing to there be " electrical contact surface lubricating and protecting agent " to cover, and antioxidant effect is good.Now technology is characteristic especially in the present invention aspect the antidusting dust; Prior art antidusting dust is to work hard on the shell of electromagnetic device, and dust is invaded because Sealing Technology does not reach level of vacuum is possible.Will cause contact gap between dust intrusion contact sets, this gap will cause electric arc even produce welding.The present invention is how concavo-convex arc surfaced of real core metal and porous layer metal because of being injected with " electrical contact surface lubricating and protecting agent " and contact in the contact; if dust is less than the porous layer metal aperture; this dust is had no effect to contact sets; if dust only may influence this part, aperture greater than the porous layer metal aperture; and the lubricating and protecting agent pressurized, inhale mechanical force this local gap is filled with; contact sets integral body is unaffected; this dust will be shifted when contact sets is moved once more, therefore can not cause welding.Real belong to existing technology can not be for also.
Concrete structure of the present invention and applicable cases further specify by following examples and accompanying drawing thereof.
Real core metal " firmly " contact " how concavo-convex cambered surface " of Fig. 1-a profile.
Real core metal " firmly " contact " how concavo-convex cambered surface " of Fig. 1-b vertical view.
Real core metal " firmly " contact " pitted skin shape " of Fig. 2-a profile.
Real core metal " firmly " contact " pitted skin shape " of Fig. 2-b vertical view.
Fig. 3-a porous layer metal " soft " contact profile.
Fig. 3-b porous layer metal " soft " contact vertical view.
Fig. 4 low tension switch, switch element figure.
Fig. 5 low tension switch, contact system figure.
The contact system figure that Fig. 6 rolls.
The contact system figure of Fig. 7 lv contactor.
The real core circle of Fig. 8-a formula plug profile.
Fig. 8-b is from spring formula plug profile.
The flat plug profile of the real core of Fig. 8-c.
The isolating points profile of Fig. 9-big capacity fuse of a sheet spring formula low pressure.
The isolating points profile of Fig. 9-big capacity fuse of b bow folder formula low pressure.
The isolating points profile of Fig. 9-big capacity fuse of c special construction formula low pressure.
Figure 10 fuse vertical view.
Figure 11-a plug-in strip front view.
Figure 11-b plug-in strip closing point profile.
The intermediate size plug assembly profile of Figure 12-a band rectangle contact knife.
The big electric current plug assembly profile of Figure 12-b band rectangle contact knife.
Real core metal " firmly " contact of embodiment one, a kind of electrical equipment make break contact of the present invention group is by pure Ag or Ag-Cu; Ag-Ni; Ag-Meo; Ag-Sno2; Alloy sheets such as Ag-2Cu, rod through mechanical car dash, draw, spray or chemical corrosion method process and can make contact surface be " how concavo-convex cambered surface " shape or " pitted skin " shape, (as Fig. 1-a Fig. 2-a).
(Fig. 3-a) is by pure Ag or Ag-Cu in " soft " contact of embodiment two, a kind of electrical equipment make break contact of the present invention group; Ag-Ni; Ag-Meo; Ag-Sno2; Alloys such as Ag-2Cu can directly be made as follows through electrochemical method:
Select for use the sponge of organic substance sponge → chemical conductive processing of adhering to specification → will handle to be bonded to connect on the spring leaf → electrochemical treatments → tread flaking processing → annealing → surface treatment.
Pure Ag or Ag-Cu can be adopted in " soft " contact of embodiment three, a kind of electrical equipment make break contact of the present invention group; Ag-Ni; Ag-Meo; Ag-Sno2; The superimposed contact geometry shape that meets specification requirement of making in advance of alloying metal nets such as Ag-2Cu uses the method for energy storage spot welding and spring leaf welded together again.
" soft " contact of embodiment four, a kind of electrical equipment make break contact of the present invention group can take poroelasticity metal and wire netting to inlay, make the contact geometry shape that adheres to specification in advance, again with the method for energy storage spot welding with to connect spring leaf welded together, also can be made into the suitable contact of cheapness through surface-coated Ag.
" soft " contact of embodiment five, a kind of electrical equipment make break contact of the present invention group is that the porous layer metal material is made, and can inject " electrical contact surface lubricating and protecting agent " and this protective agent is stored in the porous layer.
Embodiment six, a kind of electrical equipment make break contact of the present invention group is applied to electromagnetic device (Fig. 4, Fig. 5, Fig. 6, the real core metal of fixed contact Fig. 7) (1), and moving contact (2) porous layer metal, be applied to plug (Fig. 8-a, b, 1 real core metal among the c) is applied to the isolation breakpoint (Fig. 9-a of the big capacity fuse of low pressure, b, the porous layer metal of c) be applied to fuse (among Figure 10＜1〉real core metal) be applied to plug-in strip (among Figure 11-b＜1〉real core metal be moving contact,＜2〉the porous layer metal is a fixed contact) be applied to greatly, medium current plug assembly (Figure 12-a, among the b＜1〉real core metal be moving contact,＜2〉porous layer metals are fixed contact).
A kind of electrical equipment make break contact of the present invention group can save when current load is identical compared with prior art in a large number About material, but several times enlarge current load when contact geometry is measure-alike, and especially outstanding is to have antioxygen Change, prevent that dust weakens the functions such as galvanic corrosion. Except vacuum person, prolonging the contact aspect service life in the prior art Can't compare with the present invention.
Claims (4)
1, a kind of electrical equipment make break contact group is made up of the contact of one group of correspondence, and it is characterized in that: one of two contacts are real core metal " firmly " contact, and another contact is porous layer metal " soft " contact.
2, it is characterized in that according to the described a kind of electrical equipment make break contact group of claim 1: be injected with " electrical contact surface lubricating and protecting agent " in porous layer metal " soft " contact gap.
3, a kind of electrical equipment make break contact group according to claim 1 and 2 is characterized in that: real core metal " firmly " contact surface is " how concavo-convex cambered surface " shape.
4, a kind of electrical equipment make break contact group contact sets according to claim 1 and 2 is characterized in that: real core metal " firmly " contact surface is " pitted skin " shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95118200A CN1050686C (en) | 1995-11-30 | 1995-11-30 | High effective on-off contact group for electrical appliances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95118200A CN1050686C (en) | 1995-11-30 | 1995-11-30 | High effective on-off contact group for electrical appliances |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1151600A CN1151600A (en) | 1997-06-11 |
| CN1050686C true CN1050686C (en) | 2000-03-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95118200A Expired - Fee Related CN1050686C (en) | 1995-11-30 | 1995-11-30 | High effective on-off contact group for electrical appliances |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1050686C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005049235B4 (en) | 2004-10-20 | 2009-07-09 | Panasonic Corp., Kadoma | Switch and method of making the same |
| KR101102692B1 (en) * | 2009-01-15 | 2012-01-05 | 코박 컴퍼니 리미티드 | Metal mesh contact and switch and method for producing the same |
| EP2620966A1 (en) * | 2012-01-27 | 2013-07-31 | Johnson Electric S.A. | Contact arrangement for high-power electrical switching devices |
| DE102015211030A1 (en) | 2015-06-16 | 2016-12-22 | Siemens Aktiengesellschaft | Fast closing switching element |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2048595U (en) * | 1988-12-17 | 1989-11-29 | 马振中 | Camara 135 auxiliary parts for seperate picture on the same film |
| CN1009812B (en) * | 1986-07-29 | 1990-10-03 | 孙朵生;孙竹平 | Winding drum machine for kraft paper bags for cement |
| CN2087812U (en) * | 1991-03-28 | 1991-10-30 | 山东省医疗器械研究所 | Magnetic latching type energy-saving ac contactor |
-
1995
- 1995-11-30 CN CN95118200A patent/CN1050686C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1009812B (en) * | 1986-07-29 | 1990-10-03 | 孙朵生;孙竹平 | Winding drum machine for kraft paper bags for cement |
| CN2048595U (en) * | 1988-12-17 | 1989-11-29 | 马振中 | Camara 135 auxiliary parts for seperate picture on the same film |
| CN2087812U (en) * | 1991-03-28 | 1991-10-30 | 山东省医疗器械研究所 | Magnetic latching type energy-saving ac contactor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1151600A (en) | 1997-06-11 |
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