CN1151600A - 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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- CN1151600A CN1151600A CN 95118200 CN95118200A CN1151600A CN 1151600 A CN1151600 A CN 1151600A CN 95118200 CN95118200 CN 95118200 CN 95118200 A CN95118200 A CN 95118200A CN 1151600 A CN1151600 A CN 1151600A
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Abstract
An efficient contact group suitable for fusible cut-out, relay, magnetic starter, air breaker, switch and knife switch features that a pair of contacts is composed of "soft" and "hard" contacts. Said "hard" contact has more concave-convex arcs on its surface. Said "soft" contact is made of "porous" metal containing surface lubricating and protecting agent for electric contact to prevent surface oxidation and dust. Its advantages are large contact area and long service life.
Description
The invention belongs to the electrical structure thing.Be applicable to that fuse, relay, magnetic starter, air circuit, connector assembly, switch, plug-in strip etc. are the break-make protector or controller spare of dielectric with the air.
Available circuit connects that its structure of electrical equipment make break contact group at connection, shutoff, control guarantor place is most to be contacted for the corresponding bright and clean cambered surface of real core or plane form point, line, surface, and 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, it is abominable that contact sets is made environment mutually in addition--acid, salty, 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 " firmly " contact, and another contact is porous layer metal " soft " contact.
The present invention is efficient, " firmly " contact of electrical equipment switching contact sets be through machinery or chemical method processing make its surface be " how concavo-convex cambered surface " (figure one, first a) or " pitted skin " (figure one, first b) surface treated show the identical physical dimension of technology and surface area with tens of times of expansions.For surface area and another contact that " firmly " contact is enlarged coincide, another corresponding contact adopts special " porous layer metal " to make " soft " contact (figure one, second).So the contact sets of forming has guaranteed that the surface area that " how concavo-convex cambered surface " or " pitted skin " " firmly " contact enlarge is able to effective execution, thereby reaches the purpose that improves load.
The porous layer metal that the present invention is efficient, electrical equipment make break contact 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 sponge shape 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.Efficiently, afterwards owing to pressure, suction effect of mechanical force generation, this lubricating and protecting agent also has the function in gap between filling " soft " and " firmly " contact, thereby reaches the effect that weakens galvanic corrosion in electrical equipment switching contact sets injection " electrical contact surface lubricating and protecting agent ".The present invention's quality (figure diformazan, second, third, fourth are 2.) efficient, owing to moving contact when electrical equipment switching contact sets is applied to electromagnetic device (relay magnetic starter, air circuit etc.) 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 the present invention is efficient, electrical equipment make break contact 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 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, and 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.
Embodiment one, the present invention are efficient, " firmly " contact of electrical equipment switching contact sets 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 add can make contact surface be " how concavo-convex cambered surface " shape or " pitted skin " shape mutually, as figure one first a.b.
Embodiment two, the present invention " soft " contact efficient, electrical equipment switching contact sets are by pure Ag or Ag-Cu; 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 embodiment three, the present invention " soft " contact efficient, electrical equipment switching contact sets; Ag-Ni; Ag-Meo; Ag-Sno2; Superimposed the giving of alloying metal nets such as Ag-2Cu made the contact geometry shape that adheres to specification earlier, uses the method for energy storage spot welding and spring leaf welded together again.
Embodiment four, the present invention " soft " contact efficient, electrical equipment switching contact sets can take poroelasticity metal and wire netting to inlay, give and make the contact geometry shape that adheres to specification earlier, 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.
Embodiment five, the present invention are efficient, " soft " contact of electrical equipment switching contact sets 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, the present invention fixed contact (figure two 1.) and moving contact (figure two 2.) efficient, that electrical equipment switching contact sets is applied in the electromagnetic device (figure diformazan, second, third, fourth) are applied to plug (figure three 1.2.3), be applied to the isolation breakpoint of the big capacity fuse of low pressure, (figure four 1.2.3) are applied to fuse (figure five) and are applied to that plug-in strip (figure six) is applied to greatly, medium current plug assembly (figure seven .a.b).
The efficient electrical equipment make break contact of the present invention group is compared with prior art identical at current load The time a large amount of economical with materials, but several times enlarge current load when contact geometry is measure-alike, Especially outstanding is to have anti-oxidant, anti-dust to weaken the functions such as galvanic corrosion. Remove in the prior art Aspect in service life, the external prolongation of vacuum person contact can't be compared with the present invention.
Claims (7)
1, efficient, electrical equipment make break contact group is made up of the contact of one group of correspondence.It is characterized in that: one of two contacts are metal " firmly " contact, and another contact is porous layer metal " soft " contact.
2, it is characterized in that being injected with " electrical contact surface lubricating and protecting agent " in porous layer metal " soft " contact gap according to described efficient, the electrical equipment make break contact group of claim 1.
3, it is characterized in that according to described efficient, the electrical equipment make break contact group of claim 1,2: real core metal " firmly " contact surface is " how concavo-convex cambered surface " shape.
4, it is characterized in that according to described efficient, the electrical equipment make break contact group of claim 1,2: real core metal " firmly " contact surface is " pitted skin " shape.
5, it is characterized in that according to described efficient, the electrical equipment make break contact group of claim 1,2,3,4: porous layer metal " soft " contact is with electrical method pure Ag or Ag alloy to be added to be mutually sponge shape foaming metal contact.
6, it is characterized in that according to described efficient, the electrical equipment make break contact group of claim 1,2,3,4: porous layer metal " soft " contact is to adopt Ag or the superimposed contact of making of Ag alloying metal net.
7, it is characterized in that according to described efficient, the electrical equipment make break contact group of claim 1,2,3,4: porous layer metal " soft " contact is to apply pure Ag or Ag alloy again after adopting elasticity porous metals and wire netting to inlay to make the contact.
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 true CN1151600A (en) | 1997-06-11 |
| CN1050686C CN1050686C (en) | 2000-03-22 |
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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 |
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| Country | Link |
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| CN (1) | CN1050686C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7365280B2 (en) | 2004-10-20 | 2008-04-29 | Matsushita Electric Industrial Co., Ltd. | Switch and manufacturing method thereof |
| CN103227077A (en) * | 2012-01-27 | 2013-07-31 | 德昌电机(深圳)有限公司 | Contact arrangement for high-power electrical switching devices |
| CN102282637B (en) * | 2009-01-15 | 2014-02-12 | 日本小林株式会社 | Metal mesh contact and switch and method for producing same |
| CN107743648A (en) * | 2015-06-16 | 2018-02-27 | 西门子公司 | The switch element of quick-make |
Family Cites Families (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 |
-
1995
- 1995-11-30 CN CN95118200A patent/CN1050686C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7365280B2 (en) | 2004-10-20 | 2008-04-29 | Matsushita Electric Industrial Co., Ltd. | Switch and manufacturing method thereof |
| CN100446142C (en) * | 2004-10-20 | 2008-12-24 | 松下电器产业株式会社 | Switch and manufacturing method thereof |
| CN102282637B (en) * | 2009-01-15 | 2014-02-12 | 日本小林株式会社 | Metal mesh contact and switch and method for producing same |
| CN103227077A (en) * | 2012-01-27 | 2013-07-31 | 德昌电机(深圳)有限公司 | Contact arrangement for high-power electrical switching devices |
| CN107743648A (en) * | 2015-06-16 | 2018-02-27 | 西门子公司 | The switch element of quick-make |
| CN107743648B (en) * | 2015-06-16 | 2019-07-12 | 西门子公司 | The switch element of quick-make |
| US10388475B2 (en) | 2015-06-16 | 2019-08-20 | Siemens Aktiengsellschaft | Quickly closing switch element |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1050686C (en) | 2000-03-22 |
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