EP0481993B1 - Dispositif de contact pour inverseur - Google Patents

Dispositif de contact pour inverseur Download PDF

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Publication number
EP0481993B1
EP0481993B1 EP89911776A EP89911776A EP0481993B1 EP 0481993 B1 EP0481993 B1 EP 0481993B1 EP 89911776 A EP89911776 A EP 89911776A EP 89911776 A EP89911776 A EP 89911776A EP 0481993 B1 EP0481993 B1 EP 0481993B1
Authority
EP
European Patent Office
Prior art keywords
contact
connecting line
switching
piece
contact spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89911776A
Other languages
German (de)
English (en)
Other versions
EP0481993A1 (fr
Inventor
Horst Dipl.-Ing. Hendel
Josef Kern
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0481993A1 publication Critical patent/EP0481993A1/fr
Application granted granted Critical
Publication of EP0481993B1 publication Critical patent/EP0481993B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/041—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion
    • H01H11/043—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion by resistance welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/041—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion
    • H01H2011/047—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion on both sides of the contact body portion

Definitions

  • the invention relates to a contact arrangement for a changeover relay with a movable contact spring, which carries a switch contact piece on both sides at its free end and has a recess in the area of the switch contact pieces, a stranded connecting line being electrically conductively connected to at least one of the contact pieces .
  • a contact spring that can be moved between two counter-contact elements is provided at its free end with two switch contact pieces arranged on both sides.
  • the first switching contact piece arranged on one side of the movable contact spring is connected directly to an electrical connecting line designed as a copper wire, so that the contact spring itself does not carry the current to be switched.
  • the latter is so long that it exceeds the width of the free end of the movable contact spring.
  • the width of the second switching contact piece arranged on the other side of the free end of the contact spring corresponds approximately to the width of the free end of the contact spring.
  • this comparatively short switching contact piece is either welded to the contact spring or connected to the first comparatively long switching contact piece by means of an attachment.
  • the current to be switched flows in each contact-making position of the contact spring via the long switching contact piece, so that it experiences greater heating compared to the short switching contact piece. If the current to be switched flows to the short switch contact piece, it has to pass through at least two connections. However, each connection represents an increased ohmic resistance, which causes an electrical power loss.
  • the differently designed switch contact pieces lead to an asymmetrical mass distribution, which is particularly due to an unfavorable dynamic behavior during switching operations, for. B. in an increased tendency to bounce, noticeable.
  • the known contact arrangement requires a precious metal requirement which is significantly increased compared to the precious metal requirement required for the pure contact-making surfaces of the switching contact pieces.
  • the manufacture and processing of switching contact pieces of different lengths further increases the manufacturing costs for the known contact arrangement.
  • a contact arrangement is known in which a contact spring carries a contact piece on both sides.
  • a further U-shaped leaf spring serves as the connection for the power supply, so that there is twice the leaf spring thickness in the area of the contact pieces.
  • this leaf spring for power supply exerts additional forces on the contact spring; for this reason it is also limited in cross-section and can therefore not carry currents of any size. Because of its leaf spring shape, it cannot be bent in any direction and can therefore only be used for very specific contact spring arrangements.
  • GB-A-1 158 119 shows a contact spring arrangement with contact pieces applied on both sides which are welded to one another through a hole in the contact spring. However, a separate power supply is not provided there.
  • the object of the invention is to provide a contact arrangement of the type mentioned at the outset with significantly improved operating behavior while at the same time reducing the production costs.
  • An advantage of the invention is that the current to be switched flows in each contact-making position of the contact spring via only a single joint or electrical connection to the respective switching contact piece. Because only the contact surface for the respective connection to the one end of the electrical connecting line is to be provided for each switching contact piece, the required precious metal requirement of the first switching contact piece is considerably reduced and uneven heating of the two switching contact pieces of the contact arrangement according to the invention is advantageously avoided. In addition, the approximately identical design of the switch contact pieces results in a significantly more favorable, d. H. more uniform mass distribution in the area of the free end of the contact spring.
  • An advantageous development of the contact arrangement according to the invention provides that at least one of the further switch contact pieces has an extension which is electrically conductively connected to one end of the electrical connecting line.
  • a further advantageous development of the contact arrangement according to the invention consists in the fact that one end of the electrical connecting line has an extension which is electrically conductively connected to the at least one further switching contact piece.
  • Such an embodiment of the contact arrangement according to the invention has the advantage that switch contact pieces of completely identical design are used; due to the increased number of identical switch contact pieces, this is economically advantageous.
  • the approach of the one end of the electrical connection line can be produced, for example, by stamping after the one end of the electrical connection line has been compressed in a welding process. It is also conceivable that both the second switching contact piece and the one end of the electrical connecting line each have lugs, the sum of which corresponds to the thickness of the contact spring.
  • a further advantageous development of the contact arrangement according to the invention provides that the extension extends through a recess in the free end of the contact spring. With such a recess, the positioning of the approach is advantageously simplified, so that overall a higher manufacturing quality can be achieved.
  • An advantageous development of the contact arrangement according to the invention provides that the extension is fastened in the recess. So that during the manufacturing process formed between the element having the approach - namely the one end of the electrical connection line and / or the second switching contact piece - and the contact spring, a structural unit, which is advantageous for example in terms of handling during manufacture.
  • a further advantageous development of the contact arrangement according to the invention is that the electrically conductive connections are welded connections and the switch contact pieces have a plating which improves the welding behavior in the region of their welding zones.
  • the mechanical quality and the conductivity of the welded connection between the respective switch contact pieces and the one end of the electrical connecting line is further improved, as a result of which a reduction in the ohmic resistance in these areas and thus the heating of the switch contact pieces or the entire contact arrangement during the current to be switched flows, is further reduced.
  • the contact arrangement according to the invention is characterized overall by a considerable reduction in the masses to be moved during the switching operations, which on the one hand has a favorable effect on the dynamic behavior of the contact arrangement and on the other hand requires lower driving forces.
  • the contact arrangement shown schematically in FIG. 1 is part of a relay, as is generally described for example in the German utility model 83 25 986 with its magnet system.
  • a contact spring 2 is fastened to an armature 1, which is indicated as an indication.
  • the contact spring 2 has a free end 3, which serves as a center contact spring in a changeover relay.
  • the contact spring 2 or its free end 3 takes two stable positions depending on the position of the armature 1. In the first stable position (shown in FIG. 1), a mating contact element 4 forms a closed electrical contact with a switching contact piece 5. In the second stable position of the free end 3 of the contact spring 2, a second switching contact piece 6 forms a closed electrical contact with a further mating contact element 7 (FIG. 1 shows this contact in the open state).
  • connection elements 12 and 13 are each connected to connection elements 12 and 13, respectively, which emerge as external connections through a base of the changer relay, which is not shown in FIG. 1.
  • the area of the free end 3 of the contact spring 2 is shown in an exploded view in FIG.
  • One end 8 of the electrical connecting line 9 has been compressed in a welding process and has a plate-like shape.
  • the free end 3 of the contact spring 2 has a recess 21, through which a projection 22 of the rivet-like switching contact piece 6 passes through in the joined state.
  • the end face of the extension 22 is also clad with a silver layer 23.
  • FIG. 3 shows a section through FIG. 2 in the area of the switch contact pieces in the joined state.
  • the plating with the silver layers 20 and 23 results in a large-area, high-quality welded connection to one end 8 of the electrical connecting line 9 after the switching contact pieces 5 and 6 have been joined, so that a largely low-loss current flow between the electrical connecting line 9 and the respective contact-forming contact Switch contact piece 5 or 6 takes place.
  • a largely symmetrical distribution of the total mass can be seen in the area of the switching contact pieces 5 and 6.
  • the current to be switched flows via the connecting element 11, via the electrical connecting line 9, one end 8 of the electrical connecting line and the (only) electrical connection between one end 8 and the switching contact piece 5 and via the connecting element 12 (see Fig. 1).
  • the current to be switched in the second stable position of the contact spring 2 covers a corresponding path via the (only) electrical connection of the switching contact piece 6 with one end 8 of the electrical connecting line 9 to the connecting element 13.
  • FIG. 4 shows a further detail of the contact arrangement in an exploded view, in which a switch contact piece 40 and a second switch contact piece 41 are of identical design. Between the switch contact pieces 40 and 41 there is an end 42 of an electrical connecting line 43, which is provided with an extension 44 by corresponding embossing during compression.
  • the approach 44 is 45 in its height to the thickness of the free end 3 of the contact spring 2 and 46 in its diameter to the diameter of the Recess 21 matched.
  • Surfaces 47 and 48 of the switching contact pieces 40 and 41 facing one end 42 of the electrical connecting line 43 are equipped with a welding aid in the form of a silver-containing layer.
  • the elements described in connection with FIG. 4 are shown in section in the assembled state.
  • the approach 44 is connected to the recess 21 of the contact spring 2 by a riveting before the connection between the switch contact pieces 40 and 41 is made with one end 42 of the electrical connection line 43 or the approach 44 by welding.
  • the switch contact pieces 40 and 41 can be separated from the same strip material in constant lengths, the strip material being able, for example, to consist of a copper alloy coated with a noble metal on one side (contact surface), which is already coated on its other side with the welding aid.
  • the similar design of the switching contact pieces 40 and 41 also results in a particularly symmetrical design of the contact arrangement.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Contacts (AREA)
  • Push-Button Switches (AREA)
  • Relay Circuits (AREA)
  • Manufacture Of Switches (AREA)

Claims (5)

  1. Dispositif de contact pour un relais inverseur, comportant un ressort de contact mobile (2) et ayant les caractéristiques suivantes :
    - le ressort de contact (2) porte une pièce de contact de commutation (5, 6) de chaque côté de son extrémité libre (3),
    - le ressort de contact (2) possède une ouverture (21) dans la zone des pièces de contact de commutation (5, 6),
    - un conducteur de raccordement en forme de tresse (9; 43) est relié, par son extrémité gaufrée en forme de plaque (8, 42), à une face plane de l'extrémité libre (3) du ressort de contact (2),
    - une première pièce de contact (5; 41) est reliée directement selon une liaison électriquement conductrice au conducteur de raccordement (9; 43), sur la face de ce conducteur, qui est tournée à l'opposé du ressort de contact (2), et
    - une seconde pièce de contact de commutation (6; 40) est disposée sur la face du ressort de contact (2), qui est tournée à l'opposé du conducteur de raccordement (9; 43), et est également reliée directement d'une manière électriquement conductrice, par l'intermédiaire de l'ouverture (21), au conducteur de raccordement (9; 43).
  2. Dispositif de contact suivant la revendication 1, caractérisé par le fait que la seconde pièce de contact de commutation (6) possède un partie saillante (22), qui est reliée au conducteur de raccordement (9) en s'y appliquant dans l'ouverture (21) du ressort de contact.
  3. Dispositif de contact suivant la revendication 1, caractérisé par le fait que le conducteur électrique de raccordement (43) possède une partie saillante (44), qui est reliée à la seconde pièce de contact de commutation (40) en s'y appliquant dans l'ouverture (21) du ressort de contact (2).
  4. Dispositif de contact suivant la revendication 2 ou 3, caractérisé par le fait que la partie saillante (22; 44) est fixée dans l'ouverture (21) (figure 3, figure 5).
  5. Dispositif de contact suivant l'une des revendications 1 à 4, caractérisé par le fait que les liaisons électriquement conductrices sont des joints soudés et que les pièces de contact de commutation (5, 6, 41, 40) possèdent, au niveau de leurs zones de soudage, un placage (22, 23) qui améliore le comportement au soudage.
EP89911776A 1989-10-24 1989-10-24 Dispositif de contact pour inverseur Expired - Lifetime EP0481993B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE1989/000689 WO1991006964A1 (fr) 1989-10-24 1989-10-24 Dispositif de contact pour inverseur

Publications (2)

Publication Number Publication Date
EP0481993A1 EP0481993A1 (fr) 1992-04-29
EP0481993B1 true EP0481993B1 (fr) 1994-03-16

Family

ID=6835276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89911776A Expired - Lifetime EP0481993B1 (fr) 1989-10-24 1989-10-24 Dispositif de contact pour inverseur

Country Status (6)

Country Link
US (1) US5324901A (fr)
EP (1) EP0481993B1 (fr)
JP (1) JP2974704B2 (fr)
AT (1) ATE103103T1 (fr)
DE (1) DE58907255D1 (fr)
WO (1) WO1991006964A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014201533A1 (de) * 2014-01-28 2015-07-30 Tyco Electronics Austria Gmbh Schaltkontakt und Verfahren zu dessen Herstellung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19715115C2 (de) * 1997-04-11 2001-07-19 Aeg Niederspannungstech Gmbh Schaltvorrichtung
USD486797S1 (en) 2002-07-16 2004-02-17 Emerson Electric Co. Switch assembly
DE102008039704A1 (de) * 2008-08-26 2010-03-04 Tyco Electronics Amp Gmbh Kontaktanordnung mit gebogener Litze, Relais mit Kontaktanordnung und Verfahren zur Montage eines Relais
DE102008039705B4 (de) * 2008-08-26 2018-05-30 Te Connectivity Germany Gmbh Kontaktbaugruppe für ein Relais, Relais mit Kontaktbaugruppe und Verfahren zur Montage eines Relais

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3339048A (en) * 1965-10-14 1967-08-29 Texas Instruments Inc Switch having improved multiple blade assembly
DE1665958A1 (de) * 1967-06-12 1971-04-08 Siemens Ag Hochbelastbare Kontaktanordnung
US3930211A (en) * 1974-11-25 1975-12-30 Caribe Circuit Breaker Co Inc Circuit breaker
DE8325986U1 (de) * 1983-09-09 1983-12-29 Siemens AG, 1000 Berlin und 8000 München Elektromagnetisches Relais
EP0167668B1 (fr) * 1984-05-09 1988-09-07 Siemens Aktiengesellschaft Dispositif de contact pour relais à pouvoir de coupure élevé

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014201533A1 (de) * 2014-01-28 2015-07-30 Tyco Electronics Austria Gmbh Schaltkontakt und Verfahren zu dessen Herstellung

Also Published As

Publication number Publication date
JP2974704B2 (ja) 1999-11-10
JPH05503803A (ja) 1993-06-17
US5324901A (en) 1994-06-28
EP0481993A1 (fr) 1992-04-29
WO1991006964A1 (fr) 1991-05-16
DE58907255D1 (de) 1994-04-21
ATE103103T1 (de) 1994-04-15

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