EP0515269A1 - Elektrischer Schnappschalter und aus mehreren Abteilen bestehende Schalteinheit - Google Patents

Elektrischer Schnappschalter und aus mehreren Abteilen bestehende Schalteinheit Download PDF

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Publication number
EP0515269A1
EP0515269A1 EP92401370A EP92401370A EP0515269A1 EP 0515269 A1 EP0515269 A1 EP 0515269A1 EP 92401370 A EP92401370 A EP 92401370A EP 92401370 A EP92401370 A EP 92401370A EP 0515269 A1 EP0515269 A1 EP 0515269A1
Authority
EP
European Patent Office
Prior art keywords
switch according
support
plate
strip
switch
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
EP92401370A
Other languages
English (en)
French (fr)
Other versions
EP0515269B1 (de
Inventor
Joel Thurian
Jacques Weber
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.)
Dav SA
Original Assignee
Dav SA
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 Dav SA filed Critical Dav SA
Publication of EP0515269A1 publication Critical patent/EP0515269A1/de
Application granted granted Critical
Publication of EP0515269B1 publication Critical patent/EP0515269B1/de
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
    • H01H1/12—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
    • H01H1/18—Contacts characterised by the manner in which co-operating contacts engage by abutting with subsequent sliding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H23/00—Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
    • H01H23/02—Details
    • H01H23/12—Movable parts; Contacts mounted thereon
    • H01H23/16—Driving mechanisms
    • H01H23/20—Driving mechanisms having snap action

Definitions

  • the present invention relates to improvements made to snap-action electrical switches of the known type comprising, on the one hand, a thin plate of elastic metal divided, by two longitudinal slots, into three bands, at least one of which rests and can switch on a support between two positions in at least one of which a movable contact carried by said plate is pressed against a fixed contact secured to the support and, on the other hand, a pivoting actuating lever which can also switch on said support and which carries at least one finger to actuate said wafer by sliding support along one, at least, of the other strips of the wafer.
  • a switch of this type has been described for example in French patent No. 2,221,801, in the name of the DAV Company. It has the advantage, thanks to the sudden tilting of the movable contact carrier plate due to an effect of "passing neutral", to allow the establishment and breaking of high intensity currents (for example several amps) despite a small footprint of the device.
  • Such switches are widely used in the automotive industry for controlling many electrical circuits. For most applications, these switches have their two positions (work and rest) which are naturally stable, thanks to the neutral overrun effect which triggers the contact plate. mobile to one or other of its positions and keeps it there.
  • control button which is generally integral with the tilting actuating lever, must be actuated by the operator in one direction to establish the working position and, in the opposite direction, to return to the rest position.
  • the present invention aims to provide an improved snap switch and short stroke.
  • the subject of the invention is a snap-action electric switch, of the type comprising a housing, a control button for at least one pivoting actuating lever disposed in said housing, a thin plate of elastic metal divided by two longitudinal slots. , in three bands of which at least one rests and can tilt on a support between two positions in at least one of which a movable contact carried by said plate is pressed against a fixed contact, said actuating lever comprising at at least one finger for actuating said plate by sliding support along at least one of the bands of the plate, and characterized in that at least the band on which the finger is supported comprises suitable means, in cooperation with said finger, to make a movement in the same plane of said plate before tilting.
  • An advantage of the present invention lies in the fact that there is friction between the electrical contacts, before their separation, which makes it possible to have clean contacts for better conduction of electricity.
  • the wafer is guided on a support so as to avoid any lateral movement of said wafer and to always obtain repetitive support between the electrical contacts.
  • Figure 1 is a schematic sectional view of the electrical switch according to the present invention.
  • Figures 2a to 2c are perspective views of the thin wafer, according to several embodiments.
  • Figure 3 is a perspective view of the support of the thin wafer, according to a first embodiment.
  • FIG. 4 is a sectional view of the support shown in FIG. 3.
  • Figure 5 is a sectional view of the support according to another embodiment.
  • the electric snap-action switch comprises a housing 1 on which is articulated a control key 2 which, in FIG. 1, has a double direction of actuation.
  • the control key pivots about a pivot axis 3.
  • the electrical switch consequently comprising two switching assemblies arranged on either side of a central fixed blade 4 which is made of copper; the following description is made with reference to one of the switch sets.
  • the switching assembly comprises a thin plate of elastic metal 5, shown in perspective in FIGS. 2a to 2c, which is divided by two longitudinal slots 6, 7 into three strips 8, 9 and 10.
  • the central strip 9 is supported on a support 11, shown in detail in FIGS. 3 and 4 in particular, said support being electrically conductive and comprising a part 12 capable of being plugged into a base 13 of the housing and constituting a plug. current supply contact.
  • the thin plate 5 carries, at one of its ends, two movable electrical contacts 14 capable of coming to bear on an upper fixed electrical contact 15 provided on a return 16 of the central plug 4; or on a lower electrical fixed contact 17 carried by a current supply contact plug 18.
  • the central strip 9 has two openings, one 29 for fixing on the support 11 and the other 36 to stop any migration of grease towards the movable contacts 14.
  • the opening 36 is of semi-circular shape, the straight edge 36a being situated on the side of the movable contacts 14.
  • the free ends 19 and 20 of the lateral strips 8 and 10 are slightly curved (FIG. 2a) and constitute first means allowing said plate 5 to move in the same plane before it is tilted, ie before one of the contacts 14 comes resting on the upper contact 15.
  • the lateral bands 8 and 10 have, near their ends 19 and 20, at least one camber upwards 35 and said camberings 19a and 20a playing the same role as the curvatures of figure 2a.
  • the side bands 8 and 10 each have, near the end 19, 20, at minus a shallow groove 35 ′, which also allows translation of the plate 5 before its tilting.
  • the support 11 comprises a first part 12 constituting the contact plug or connection tab, a second inclined part 21 and a third part 22 which can be inclined or horizontal and parallel to the part 12, as shown in FIG. 4. Near the junction of parts 12 and 21, an opening 23 is made in part 12 and the metal tab 24 thus produced is folded in one direction or the other.
  • the tongue 24 constitutes a stop which comes to bear on a bottom 25 of a passage 26 for the part 12 in the base 13, beyond the tongue 24, the support 11 can no longer be removed. The insertion is authorized thanks to the elasticity of the tongue 24 which is housed in the orifice 23 the time necessary for the crossing of the base 13.
  • the part or tab 22 is between two small support zones 27 formed on the part 21, and has a notch 28.
  • the part 22 passes through an opening 29 formed in the central strip 9 of the thin plate 5.
  • the strip central unit 9 rests on the support zones 27 which constitute, with the opening 29, support and guide means for the thin plate 5.
  • the notch 28 has a dual function. The first is to correctly position the support 11 in the base 13 of the housing, by means of an appropriate tool which is engaged in said notch. The second is to provide two wings 28a which, after folding in any direction, prevent the thin plate 5 from being extracted from the support when the switch is reversed. In this way, very small tolerances are overcome as regards the dimensions of the opening 29 of the wafer, which can be oversized with respect to the part 22.
  • the part 22 constitutes both a guiding and retaining means for the strip 9 of the wafer 5.
  • the support 11 has a second part 21 ′ which is substantially perpendicular to the two parallel parts 12 and 22.
  • the switch shown in Figure 1 comprises a part 30 in the form of an inverted U which is integral with the control button 2 and which, during pivoting pushes a lever 30 ′ comprising two fingers 31 whose lower ends 32 are in sliding contact on the lateral bands 8 and 10 of the plate 5.
  • the fingers 31 are returned to the stable position by means of a spring 33, in the form of a hairpin, mounted between the said fingers and the body of the housing 1.
  • the ends 32 of the fingers 31 slide on the side strips 8 and 10 until they meet the raised parts 19 and 20.
  • the lower contact 14 is therefore moved on the lower contact 1 7, thus causing friction between the contacts 14 and 17 and consequently cleaning of the said contacts, which ensures better conduction of the electricity circulating in the plugs 12 and 18.
  • the movable and fixed contacts 14, 15 and 17 are made of an alloy of silver and cadmium oxide and the central fixed blade 4 is made of copper.

Landscapes

  • Push-Button Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Switches With Compound Operations (AREA)
EP19920401370 1991-05-22 1992-05-20 Elektrischer Schnappschalter und aus mehreren Abteilen bestehende Schalteinheit Expired - Lifetime EP0515269B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9106147 1991-05-22
FR9106147A FR2676856B1 (fr) 1991-05-22 1991-05-22 Commutateur electrique a action brusque et ensemble de commutation forme de plusieurs compartiments.

Publications (2)

Publication Number Publication Date
EP0515269A1 true EP0515269A1 (de) 1992-11-25
EP0515269B1 EP0515269B1 (de) 1995-10-04

Family

ID=9412990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920401370 Expired - Lifetime EP0515269B1 (de) 1991-05-22 1992-05-20 Elektrischer Schnappschalter und aus mehreren Abteilen bestehende Schalteinheit

Country Status (4)

Country Link
EP (1) EP0515269B1 (de)
DE (1) DE69205212T2 (de)
ES (1) ES2080459T3 (de)
FR (1) FR2676856B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1467393A2 (de) 2003-04-10 2004-10-13 BJ Automotive GmbH Schnappfedertaster

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2221801A1 (en) * 1973-03-13 1974-10-11 Dav Overcentre type snap action electrical switch - has ends of pivoting fingers acting on flexible contact plate
FR2253264A1 (de) * 1973-12-03 1975-06-27 Marquardt J & J
EP0252285A1 (de) * 1986-06-03 1988-01-13 Aktieselskabet Laur. Knudsen Nordisk Elektricitets Selskab Elektrischer Schalter
EP0375521A1 (de) * 1988-12-23 1990-06-27 Valeo Electronique Schalter, insbesondere für Kraftfahrzeuge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2221801A1 (en) * 1973-03-13 1974-10-11 Dav Overcentre type snap action electrical switch - has ends of pivoting fingers acting on flexible contact plate
FR2253264A1 (de) * 1973-12-03 1975-06-27 Marquardt J & J
EP0252285A1 (de) * 1986-06-03 1988-01-13 Aktieselskabet Laur. Knudsen Nordisk Elektricitets Selskab Elektrischer Schalter
EP0375521A1 (de) * 1988-12-23 1990-06-27 Valeo Electronique Schalter, insbesondere für Kraftfahrzeuge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1467393A2 (de) 2003-04-10 2004-10-13 BJ Automotive GmbH Schnappfedertaster
EP1467393A3 (de) * 2003-04-10 2006-05-03 BJ Automotive GmbH Schnappfedertaster

Also Published As

Publication number Publication date
FR2676856B1 (fr) 1993-09-03
DE69205212T2 (de) 1996-05-23
EP0515269B1 (de) 1995-10-04
ES2080459T3 (es) 1996-02-01
DE69205212D1 (de) 1995-11-09
FR2676856A1 (fr) 1992-11-27

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