EP0173193A2 - Interrupteur électrique - Google Patents

Interrupteur électrique Download PDF

Info

Publication number
EP0173193A2
EP0173193A2 EP85110326A EP85110326A EP0173193A2 EP 0173193 A2 EP0173193 A2 EP 0173193A2 EP 85110326 A EP85110326 A EP 85110326A EP 85110326 A EP85110326 A EP 85110326A EP 0173193 A2 EP0173193 A2 EP 0173193A2
Authority
EP
European Patent Office
Prior art keywords
contact
pressure spring
contact arm
arm
contact pressure
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.)
Granted
Application number
EP85110326A
Other languages
German (de)
English (en)
Other versions
EP0173193A3 (en
EP0173193B1 (fr
Inventor
Erwin Ing. Grad. Muders
Rudolf Sellner
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.)
ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Original Assignee
Brown Boveri und Cie AG Germany
Asea Brown Boveri AG Germany
BBC Brown Boveri AG Germany
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 Brown Boveri und Cie AG Germany, Asea Brown Boveri AG Germany, BBC Brown Boveri AG Germany filed Critical Brown Boveri und Cie AG Germany
Priority to AT85110326T priority Critical patent/ATE53696T1/de
Publication of EP0173193A2 publication Critical patent/EP0173193A2/fr
Publication of EP0173193A3 publication Critical patent/EP0173193A3/de
Application granted granted Critical
Publication of EP0173193B1 publication Critical patent/EP0173193B1/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
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts

Definitions

  • the invention relates to an electrical switch according to the preamble of claim 1.
  • a contact arrangement for a low-voltage switch with a contact arm and a contact pressure spring designed as a torsion spring has become known from DE-GM 19 09 358.
  • the object of the invention is to make the contact spring simpler and to make the holder or the connection to the movable contact arm easier. This object is achieved according to the invention by the characterizing features of claim 1.
  • the end of at least one tab is cage-like bent inwards, whereby the coil spring is at least partially covered. This forms a stop for the coil spring.
  • the effect of these stops is as follows: after the unlatching has taken place and the contact lever has traveled a certain distance, the leg coil spring is relaxed and it engages one or two stops. The force and the friction on the switching pin are thus eliminated or at least considerably reduced and the contact lever can continue to move freely under the action of a contact opening spring or an impact anchor.
  • leg ends of the compression spring is bent so that the leg ends do not staple themselves in the contact lever.
  • the geometry of the design should be chosen so that the bearing point of the lever opposite the contact piece, the bearing point of the leg end that is not bent up, and the central axis of the switching pin lie on one line.
  • grooves can be provided in the contact lever, which serve to guide the leg ends.
  • FIG. 1 shows an electrical low-voltage switch with a contact bridge 10, on which two movable contact pieces 11 and 12 are formed, which come into contact with two fixed contact pieces 13 and 14, whereby the two fixed contact pieces 13 and 14 are connected by means of the contact bridge 10.
  • two tabs 15 and 16 are formed on both sides of the contact bridge 10 approximately in the middle thereof, each having an elongated hole 17 and 18 extending up to the contact bridge 10. The two elongated holes 17 and 18 are aligned.
  • switching pin 19 also called switching rod 19.
  • a contact pressure spring 20 which is designed as a torsion spring, the two ends 21 and 22 of which are elongated and, as can be seen from FIG. 1, form an obtuse angle alpha with one another.
  • the ends of the legs 21 and 22 lie in one plane and in the position indicated in FIGS. 1 and 2 directly on the upper surface of the contact bridge.
  • the arrangement is such that the distance A 1 of the switching rod or the central axis of the switching rod 19 from the upper surface of the contact bridge 10 is always smaller than the extent of the V-shape formed by the two legs 21 and 22 in a relaxed manner State in the direction transverse or perpendicular to the central axis of the switching rod 19. This ensures that the switching rod 19 presses the two leg ends 21 and 22 continuously against the contact bridge 10, the switching rod 19 with a surface area facing the contact bridge on the inside of the contact pressure spring 20th is present.
  • a slot 23 is provided for guiding the shift rod 19.
  • FIGS. 3 and 4 shows a contact lever arrangement in which the movable contact arm is designed as a contact lever 30 supported on one side, a movable contact piece 31 is formed on one end and the other end of the contact arm 30 is supported on a stationary bearing element 32.
  • the fixed contact piece% bears the reference number 33.
  • the support at point 32 that is to say at support point 32, can also be a latching point.
  • the support point 32 is attached to a ratchet lever 34 which is articulated or rotatable about a fixed axis 35.
  • Support point 32 is actually designed as a latching point.
  • the geometry of the arrangement is chosen so that the connecting lines between the support 32, the support point of the leg 21 and the center of the switching pin 19 form a straight line, ie that the three points are aligned. It is thereby achieved that the end of the leg 22 only slides, which can be supported by the fact that this end 22a, as indicated in Fig. 7, is bent.
  • the contact pressure spring is the same as that according to FIGS. 1 and 2 and for this reason it also bears the reference numbers 20, 21 and 22.
  • the distance of the central axis of the switching rod 19 from the contact lever 30 is denoted by b.
  • the torsion spring 20 or contact pressure spring 20 generates the contact pressure force, which is divided into the actual contact force P 1 and the contact force or latching force P 2 .
  • the arrangement has, in the same way as that of FIG. 2, two tabs 36 and 37, which are provided with elongated holes 38 and 39, through which the shift rod 19 extends.
  • the ends of the two tabs 36 and 37 additionally have an inward bend 40 and 41, so that a cage is formed by the tabs 36 and 37 with the angled portions 40 and 41.
  • the distance of the surface line M, which lies on the side of the torsion spring or contact pressure spring 20 opposite the two legs 21 and 22, from the inner surface of the bends 41 and 42 is d. This dimension is chosen so that after a contact opening (see in Figures 5 and 6) the turns of the contact pressure spring abut against the tabs 40 and 41 (see Figures 5 and 6).
  • the distance b naturally increases and becomes b 1 , because the relaxation of the legs 21 and 22 pushes the contact lever 30 away from the switching rod 19.
  • the surface line M bears against the stops 40 and 41, so that the relaxation movement of the legs 21 and 22 is limited, and as a result the switching rod 19 is released from the inner surfaces of the turns of the contact pressure spring 20.
  • a gap c is obtained between the inner surface of the turns of the contact pressure spring 20 and the outer surface of the switching rod 19, as a result of which the friction between the switching rod 19 and the turns of the contact pressure spring 20 is eliminated.
  • the force with which the contact lever is brought into the switch-off position is brought about by a switch-off spring 42.
  • Figures 7 and 8 show a further embodiment of the invention. This is essentially the same arrangement as that according to FIGS. 3 and 4 or 5 and 6, only a difference being present in that two tabs 71 and 72 are formed on the contact lever 70, of which only one Tab 71 has an angle 73.
  • the relaxation path of only the two turns 74 and 75 is thereby limited, whereas the turns 76, 77 and 78 can deform freely.
  • the two windings 74 and 75 are located at a distance c from the shift rod 19, the turn 76 also running at a reduced distance from the shift rod 19, whereas the two turns 77 and 78 are in the lower region, ie there where the two legs 21 and 22 lie, have already placed against the shift rod 19.
  • the friction between the contact pressure spring 20 and the switching rod 19 is slightly and ,, dosed increased, which can be very desirable for assembly reasons.
  • the contact arrangement can be used not only on contact bridge switches, but also on contact lever switches.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Lock And Its Accessories (AREA)
  • Air Bags (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Relay Circuits (AREA)
EP85110326A 1984-08-29 1985-08-19 Interrupteur électrique Expired - Lifetime EP0173193B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85110326T ATE53696T1 (de) 1984-08-29 1985-08-19 Elektrischer schalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843431664 DE3431664A1 (de) 1984-08-29 1984-08-29 Elektrischer Schalter
DE3431664 1984-08-29

Publications (3)

Publication Number Publication Date
EP0173193A2 true EP0173193A2 (fr) 1986-03-05
EP0173193A3 EP0173193A3 (en) 1987-09-16
EP0173193B1 EP0173193B1 (fr) 1990-06-13

Family

ID=6244136

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110326A Expired - Lifetime EP0173193B1 (fr) 1984-08-29 1985-08-19 Interrupteur électrique

Country Status (3)

Country Link
EP (1) EP0173193B1 (fr)
AT (1) ATE53696T1 (fr)
DE (2) DE3431664A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4117120A1 (de) * 1991-05-25 1992-11-26 Abb Patent Gmbh Kontaktanordnung fuer einen elektrischen schalter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4106653A1 (de) * 1991-03-02 1992-09-03 Abb Patent Gmbh Kontaktanordnung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1057734A (fr) * 1951-06-08 1954-03-10 Licentia Gmbh Dispositif de contacts pour disjoncteurs et contacteurs électriques
DE1071198B (fr) * 1959-12-17
US2942083A (en) * 1956-12-24 1960-06-21 Westinghouse Electric Corp Circuit interrupters
DE1105968B (de) * 1960-04-14 1961-05-04 Continental Elektro Ind Ag Schaltvorrichtung fuer elektrische Selbstschalter
DE1909358U (de) * 1964-11-11 1965-02-04 Stotz Kontakt Gmbh Schalter mit einer haltevorrichtung am kontakttraeger fuer einen mit einer kontaktdruckfeder zusammenarbeitenden kontaktfinger.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD8909A (fr) *
US1312208A (en) * 1919-08-05 Ebectkic-cxjrcirit makeitt autb bxraker
DE822273C (de) * 1949-11-11 1951-11-26 Elektrotechnische Spezialfabri Elektrischer Schalter bzw. Selbstschalter
DE957411C (de) * 1951-06-08 1957-01-31 Licentia Gmbh Kontaktanordnung fuer elektrische Selbstschalter und Schuetze
DE1202879B (de) * 1957-04-24 1965-10-14 Licentia Gmbh Elektrisches Schaltegraet mit U-foermigem, ueberbrueckendem Kontaktbuegel
DE7235951U (de) * 1972-09-29 1976-04-15 Siemens Ag, 1000 Berlin Und 8000 Muenchen Elektromagnetisches Schaltgerät

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071198B (fr) * 1959-12-17
FR1057734A (fr) * 1951-06-08 1954-03-10 Licentia Gmbh Dispositif de contacts pour disjoncteurs et contacteurs électriques
US2942083A (en) * 1956-12-24 1960-06-21 Westinghouse Electric Corp Circuit interrupters
DE1105968B (de) * 1960-04-14 1961-05-04 Continental Elektro Ind Ag Schaltvorrichtung fuer elektrische Selbstschalter
DE1909358U (de) * 1964-11-11 1965-02-04 Stotz Kontakt Gmbh Schalter mit einer haltevorrichtung am kontakttraeger fuer einen mit einer kontaktdruckfeder zusammenarbeitenden kontaktfinger.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4117120A1 (de) * 1991-05-25 1992-11-26 Abb Patent Gmbh Kontaktanordnung fuer einen elektrischen schalter

Also Published As

Publication number Publication date
DE3578259D1 (de) 1990-07-19
EP0173193A3 (en) 1987-09-16
EP0173193B1 (fr) 1990-06-13
ATE53696T1 (de) 1990-06-15
DE3431664A1 (de) 1986-03-20

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