EP0543124A2 - Interrupteur électrique - Google Patents

Interrupteur électrique Download PDF

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Publication number
EP0543124A2
EP0543124A2 EP92116851A EP92116851A EP0543124A2 EP 0543124 A2 EP0543124 A2 EP 0543124A2 EP 92116851 A EP92116851 A EP 92116851A EP 92116851 A EP92116851 A EP 92116851A EP 0543124 A2 EP0543124 A2 EP 0543124A2
Authority
EP
European Patent Office
Prior art keywords
contact
electrical switch
tab
switch according
housing part
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
EP92116851A
Other languages
German (de)
English (en)
Other versions
EP0543124A3 (en
EP0543124B1 (fr
Inventor
Alois Schäffeler
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.)
Marquardt GmbH
Original Assignee
Marquardt GmbH
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 Marquardt GmbH filed Critical Marquardt GmbH
Publication of EP0543124A2 publication Critical patent/EP0543124A2/fr
Publication of EP0543124A3 publication Critical patent/EP0543124A3/de
Application granted granted Critical
Publication of EP0543124B1 publication Critical patent/EP0543124B1/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
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/60—Angularly-movable actuating part carrying no contacts
    • H01H19/635—Contacts actuated by rectilinearly-movable member linked to operating part, e.g. by pin and slot
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon

Definitions

  • the invention relates to an electrical switch according to the preamble of patent claim 1.
  • Such electrical switches are used for switching on and off electrical direct or alternating current circuits in which high currents of, for example, up to 20 A can flow. They are used particularly in machine tools with high power consumption, for example in angle grinders or circular saws.
  • Switches have also become known in which contact lugs made of copper are arranged in the housing with a normally closed contact, a rotatable contact rocker moved by an actuating element via a push rod and a compression spring bridging the normally closed contacts with a switching contact.
  • the disadvantage mentioned also occurs here, namely a very strong erosion at the normally closed contact, which renders the switch unusable after only a short period of use.
  • the invention is therefore based on the object of developing a switch of the type mentioned at the outset in such a way that harmful contact erosion on the normally closed contacts of the contact tabs is prevented.
  • the advantages achieved by the invention are, in particular, that silvering of the normally closed contacts or the entire contact tabs can be dispensed with. This saves considerable costs. No harmful erosion occurs at the normally closed contacts, so that the service life of the switch according to the invention is considerably extended. Furthermore, an improved switching function is also achieved in this way, since no incorrect switching can occur. Finally, the switch according to the invention also manages with fewer and simpler individual parts than that according to DE-OS 31 26 816.
  • a bolt can be integrally formed on the actuating member, in particular by plastic injection molding at the same time as the actuating member is being manufactured, this bolt being hooked into a corresponding receptacle on the push rod.
  • the contact rocker can be chamfered on its peripheral side facing away from the fulcrum and adjacent to the switch contact, so that the contact rocker at most partially touches the contact lugs in the off position of the switch. This results in a reduced friction between the contact rocker and the contact lugs, so that the switch-on behavior is improved.
  • a further improvement in the switch-on behavior is achieved by arranging a sliding plate that reduces the sliding friction on the side assigned to the upper part of the switch in the carrier, which in turn is attached to the push rod.
  • the electrical switch 1 of the present exemplary embodiment is designed as a two-pole closer or on-off switch and has an upper housing part 2 shown in longitudinal section in FIG. 1 and a lower housing part 3.
  • the upper housing part 2 encompasses the upper edge of the lower housing part 3 and is connected to the lower housing part 3 in a snap-in or snap-in manner.
  • the upper and lower parts of the housing can also consist of a single piece.
  • the pusher cap 5 is under the pressure of a helical compression spring 12 attached to the arm 11.
  • a bolt 7 is formed on the end of the pusher cap 5 assigned to the upper housing part 2. If the pusher cap 5 is made of plastic, as is customary, the bolt 7 can be injection molded at the same time as the pusher cap 7 is being produced.
  • the bolt 7 of the pusher cap is suspended in a receptacle 8 of a push rod 9 which projects into the interior of the electrical switch 1, so that the rotatable pusher cap 5 is articulated on the push rod 9 eccentrically.
  • a seal 10 which prevents dirt from penetrating into the electrical switch.
  • the pusher cap 5 If the pusher cap 5 is actuated against the pressure of the helical compression spring 12, it rotates around the pin 6 (dashed position in FIG. 1) and takes the push rod 9 with the bolt 7 via the receptacle 8. As a result, the push rod 9 arranged in a corresponding guide in the upper housing part 2 is moved to the right in FIG. 1. After releasing the pusher cap 5, it is returned to the starting position by the pressure of the helical compression spring 12 and the push rod 9 is moved in the opposite direction (to the left in FIG. 1). Thus, the push rod 9 is moved linearly in the arrow direction 14 by the pusher cap 5.
  • a movable contact member which thereby bridges the contacts and which consists of a contact rocker 15 which is rotatably mounted in the upper housing part 2.
  • a conical extension 16 on which one end of a compression spring 17 is held.
  • the other end of the compression spring 17 is held by a further extension 18, which comes from a carrier 19, which in turn is attached to the end of the push rod 9 located inside the electrical switch 1.
  • On the carrier 19 there is a sliding plate 13 facing the upper housing part 2 and in contact therewith. This sliding plate lowers the frictional force when the carrier 19 moves due to the lower sliding friction coefficient.
  • a lubricant can be located between the sliding plate 13 and the upper housing part 2 .
  • the contact rocker 15 made of insulating material, for example plastic, is divided in two on its peripheral side facing away from the fulcrum.
  • the part 21 of the peripheral side facing the push rod 9 carries a planar switch contact 22, which is U-shaped in plan view, as can be seen in particular in FIG. 2.
  • This switch contact 22 can consist of surface silver-plated copper.
  • the part 20 of the contact rocker 15 facing away from the push rod 9, which is adjacent to the switch contact 22 is beveled on the peripheral side, so that the part 20 of the contact rocker 15 is in the off position of the switch does not abut or only partially abuts the contact lugs 23 ', 23' 'located in the lower housing part 3. This results in a reduced friction between the contact rocker 15 and the contact tabs 23 ', 23' ', which improves the switch-on behavior.
  • the contact lugs 23 ', 23''made of copper have a molded-on rectangular connector 25 with a through hole 26.
  • a U-shaped, on the connecting piece 25 adjacent connecting element 27 made of brass is used, at the U-middle piece to Through hole 26 corresponding thread 28 is attached so that the electrical conductors can be attached to the connector 25 with a corresponding screw.
  • the push rod 9 moves with the carrier 19 in the right direction according to FIG. 1, as already described.
  • the abutting end of the compression spring 17 is also moved via the extension 18 and the compression spring 17 moves from the first inclined position shown in FIG. 1 to an unstable intermediate position in which it stands approximately radially to the peripheral side of the contact rocker 15.
  • a slight further movement in the actuation direction of the push-button cap 5 is sufficient to cause the compression spring 17 to jump over into the second inclined position.
  • the contact rocker 15 is carried along by the other end of the compression spring 17 via the extension 16 and snaps from the off to the on position, which can be seen in more detail in FIG. 3.
  • the contact lug 23 ' has the on the Contact rocker 15 is arranged in the side of the lower housing part 3 facing away from the off position (left contact lug in FIG. 2), an extension arranged on the normally closed contact 29 'in the direction of the contact contact rocker 15, the so-called extinguishing lug 32.
  • the mode of operation of the extinguishing flag 32 can be seen in more detail in FIG. 4.
  • the switching contact 22 When the switching contact 22 is withdrawn from the normally closed contacts 29 ', 29'', the switching contact 22 runs through the section along the part 33 of the contact lug 23''which lies between the normally closed contact 29''and the connecting piece 25, and along the extinguishing lug 32
  • the switching contact 22 When the switching contact 22 is opened by the normally closed contacts 29 ', 29''and when the switching contact 22 and the normally closed contacts 29', 29 '' are switched off, arcs 34 ', 34''which arise are moved by the moving switching contact 22 to the part 33 as well as carried on the firefighting flag 32. Since the switching contact snaps due to the action of the compression spring 17 (see FIG.
  • the extinguishing tab 32 is preferably arranged in alignment with the part of the contact tab 23 'located between the normally closed contact 29' and the connecting piece 25 and with the same width as the contact tab 23 '. Production is particularly simple if the extinguishing flag 32 and the contact flag 23 'consist of a common part. Furthermore, it has been shown that an effective prevention of the contact erosion is already achieved with a length of between 2 and 5 mm of the extinguishing tab 32.
  • the invention is explained on a switch provided with a contact rocker. It can also be used on other switches, for example on those in which the contact member is moved linearly or the push rod is articulated or fastened directly to the actuating member.
  • Essential to the invention is the arrangement of an extinguishing tab on the normally closed contact of the contact tab, which is arranged on the side of the housing facing away from the contact member in the off position.

Landscapes

  • Push-Button Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP92116851A 1991-11-22 1992-10-01 Interrupteur électrique Expired - Lifetime EP0543124B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4138484 1991-11-22
DE4138484 1991-11-22
DE4138902 1991-11-27
DE4138902 1991-11-27

Publications (3)

Publication Number Publication Date
EP0543124A2 true EP0543124A2 (fr) 1993-05-26
EP0543124A3 EP0543124A3 (en) 1993-10-06
EP0543124B1 EP0543124B1 (fr) 1996-01-10

Family

ID=25909403

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92116851A Expired - Lifetime EP0543124B1 (fr) 1991-11-22 1992-10-01 Interrupteur électrique

Country Status (5)

Country Link
US (1) US5326946A (fr)
EP (1) EP0543124B1 (fr)
JP (1) JPH05242761A (fr)
DE (2) DE4232975A1 (fr)
ES (1) ES2084235T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5541449A (en) * 1994-03-11 1996-07-30 The Panda Project Semiconductor chip carrier affording a high-density external interface
US5473303A (en) * 1994-05-31 1995-12-05 Therm-O-Disc, Incorporated Electrical lead
DE19726402B4 (de) * 1997-06-21 2009-03-05 Marquardt Gmbh Elektrischer Schalter
JP4063528B2 (ja) * 2001-11-27 2008-03-19 佐鳥エス・テック株式会社 スイッチの接触機構
US8110765B2 (en) * 2005-06-09 2012-02-07 Oryon Technologies, Llc Electroluminescent lamp membrane switch

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE414044A (fr) *
DE701023C (de) * 1934-12-08 1941-01-07 Siemens Schuckertwerke Akt Ges Elektrischer Installationsschalter
US3348010A (en) * 1964-03-31 1967-10-17 Arrow Hart & Hegeman Electric Trigger operated tool handle switch
FR2362483A1 (fr) * 1976-08-19 1978-03-17 Cutler Hammer World Trade Inc Interrupteur de courant a rupture brusque
GB2169450A (en) * 1984-12-21 1986-07-09 Schupa Elektro Gmbh & Co Kg A leakage current protection circuit breaker

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE480164C (de) * 1927-07-28 1929-07-27 Calor Elek Zitaets Akt Ges Kontaktanordnung an Selbstschaltern
US2153396A (en) * 1937-11-09 1939-04-04 Gen Electric Slow break switch
US2254347A (en) * 1938-04-27 1941-09-02 George R Blakesley Electric switch
DE3126816A1 (de) * 1981-07-08 1983-01-27 Marquardt Gmbh, 7201 Rietheim-Weilheim "elektrischer schalter"
FR2511807A1 (fr) * 1981-08-20 1983-02-25 Alsthom Atlantique Sectionneur interrupteur multipolaire a embrochage et debrochage sur un jeu de barres
US4472614A (en) * 1983-01-19 1984-09-18 Eaton Corporation Electric switch with improved sliding contact holder
JPS61185824A (ja) * 1985-02-14 1986-08-19 松下電器産業株式会社 スイツチ
JPH03134924A (ja) * 1989-10-20 1991-06-07 Omron Corp スロースタートスイッチ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE414044A (fr) *
DE701023C (de) * 1934-12-08 1941-01-07 Siemens Schuckertwerke Akt Ges Elektrischer Installationsschalter
US3348010A (en) * 1964-03-31 1967-10-17 Arrow Hart & Hegeman Electric Trigger operated tool handle switch
FR2362483A1 (fr) * 1976-08-19 1978-03-17 Cutler Hammer World Trade Inc Interrupteur de courant a rupture brusque
GB2169450A (en) * 1984-12-21 1986-07-09 Schupa Elektro Gmbh & Co Kg A leakage current protection circuit breaker

Also Published As

Publication number Publication date
EP0543124A3 (en) 1993-10-06
DE4232975A1 (de) 1993-05-27
JPH05242761A (ja) 1993-09-21
US5326946A (en) 1994-07-05
DE59205007D1 (de) 1996-02-22
EP0543124B1 (fr) 1996-01-10
ES2084235T3 (es) 1996-05-01

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