EP0583715B1 - Commutateur électrique - Google Patents

Commutateur électrique Download PDF

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Publication number
EP0583715B1
EP0583715B1 EP93112752A EP93112752A EP0583715B1 EP 0583715 B1 EP0583715 B1 EP 0583715B1 EP 93112752 A EP93112752 A EP 93112752A EP 93112752 A EP93112752 A EP 93112752A EP 0583715 B1 EP0583715 B1 EP 0583715B1
Authority
EP
European Patent Office
Prior art keywords
switching device
switching
spring
housing
fixed contact
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
EP93112752A
Other languages
German (de)
English (en)
Other versions
EP0583715A1 (fr
Inventor
Heinz Dieter Schmitz
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.)
ABB Patent GmbH
Original Assignee
ABB Patent 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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0583715A1 publication Critical patent/EP0583715A1/fr
Application granted granted Critical
Publication of EP0583715B1 publication Critical patent/EP0583715B1/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/30—Energy stored by deformation of elastic members by buckling of disc springs

Definitions

  • the invention relates to an electrical switching device, in particular switches or buttons, with a housing with connecting leads therein, with fixed contact pieces and at least one self-resetting movable contact piece, which is designed as a switching spring which is used in the housing moisture-tight, which fixed contact pieces with the in the housing molded or mechanically held connecting conductors are connected in one piece.
  • a switching device which is designed as a button with snap contact and has a low overall height.
  • the snap contact is arranged on a printed circuit board in the correct position and function, and is sealed and fixed airtight on the printed circuit board by means of an adhesive film.
  • this arrangement behaves similarly to a bellows, so that dust, moist air and the like are sucked into the switching system with each switching operation, unless all-round good adhesive adhesion of the cover film is guaranteed.
  • This is the problem of the arrangement described, since the snap contact and the adhesive film fixing it can only be applied after the printed circuit board has been fully assembled. In this case, solder residues and dirt and the like act as adhesion preventers, so that the adhesive bond can be interrupted locally.
  • This known switching device is of compact design, but due to the contact elements provided, it can lead to incorrect switching as a result of bouncing of the movable contact piece and erosion.
  • the switching spring serving as a movable contact piece has a triangular shape, that the contacting with the fixed contact pieces is provided at the corner points and in the middle of each triangular switching spring, that the switching spring has bulges at the points provided for contacting the fixed contact pieces and that the switch spring is glued airtight to the housing by means of adhesive film.
  • a preferred embodiment of the invention provides that at least two switching springs are provided, which are used to selectively contact a common fixed contact piece.
  • each switching spring has a triangular shape.
  • An arrangement of the switch springs, in which the switch springs are directed towards one another with their tips, has proven to be particularly advantageous when it comes to contacting a common fixed contact piece.
  • the housing is prepared in such a way that a precisely contoured receptacle allows the contact-fitting switching spring assembly to be inserted with a precise fit and enables a simple sealing at the edge between the housing and the spring surface.
  • the switching spring advantageously consists of a highly conductive spring material and is designed as a self-resetting snap contact.
  • the switching spring is curved or it can have a trough-shaped impression, which gives the switching spring a monostable switching behavior.
  • the switching springs In order to improve contacting with the fixed contact pieces, it may be expedient to provide the switching springs with bulges at the points provided for contacting. These bulges can be formed either by appropriate impressions or by molding.
  • the switching device according to the invention with all the configurations described above is designed as a short-stroke switching device with a switching travel ⁇ 2 mm.
  • a preferred use of the switching device according to the invention can be installed in a multiple switching device, for. B. window switch for motor vehicles may be provided, each switch spring by an actuator, for. B. rocker is acted upon.
  • an electrical switching device is shown in plan view, which has two pairs of switching springs 14 and a housing 12 made of plastic with fixed contact pieces 18, 20, 22 held therein in recesses 15.
  • the two switching springs 14 are flat and are arranged at a short distance from the fixed contact pieces 18, 20, 22.
  • the switching springs 14 are preferably made of highly conductive spring bronze and serve as a movable contact piece.
  • the fixed contact pieces 18, 20, 22 located below the relevant switching spring 14 are connected to one another and thereby one or more circuits are closed via conductor tracks 16.
  • the switching springs 14 are each slightly upwards, i. H. away from the fixed contact pieces, arched, which enables their function as a snap contact. Due to the material-related stiffness of the switching springs 14, these have the tendency to return to their starting position when they are pressed by pushing in the direction of the fixed contact pieces 18, 20, 22.
  • the electrical switching device shown and described in Figure 1 is shown in partial section in side view.
  • the other features shown are designated by the corresponding reference numerals as in FIG. 1.
  • the explanations in this regard accordingly also apply to the illustration in FIG. 2.
  • the sealing of the switching springs 14 in the plastic molded housing 12 can be provided in various ways. Either the switch springs 14 are taped in accordance with the switches of the known type by means of an adhesive film 24 in the plastic molded housing 12, so that the problem of the reduction in liability which occurs in the known switches as a result of solder residues and contamination cannot be taken care of here, or the switch springs 14 are shaped. and / or anchored in the plastic housing 12, e.g. B. clamped between lateral boundaries and sealed by means of sealing compound.
  • Such lateral boundaries can, for. B. be formed on each of the triangular sides of the switching spring 14 on the housing 12.
  • the triangular edges of the switch springs are each supported by the limits not shown here non-positively, whereby the elasticity inherent in the plastic is used. As a result, slight changes in distance when the switching spring 14 is actuated are irrelevant.
  • Another possibility of holding the switching springs 14 may be that on the plastic housing 12, for. B. hook-like formations are also provided in the region of the triangle sides, between which the switching springs 14 are guided and are held by the hook-shaped projection of the molding.
  • conductor tracks 16, resistors 30 and LED 32 are connected to one another.
  • the switching device shown in detail in FIG. 2 is a so-called window switch for installation in motor vehicles.
  • the switching springs 14 with the movable contact pieces are inserted into precisely fitting recesses 15, possibly with bead-like formations.
  • This contact arrangement 14 is sealed airtight with an adhesive film 24, so that the wear due to erosion is negligible when the contacts 14, 18, 20, 22 are actuated.
  • a button 26 is used to actuate the movable contact 14, which button has only a small switching travel due to the small switching stroke of the switching springs 14.
  • the low overall height of the switching device according to the invention proves to be advantageous, since switches of this type are often accommodated in the door trim of the motor vehicles, where, due to the design, there are only small installation depths and switches installed there may only have small overall heights.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Slide Switches (AREA)

Claims (12)

  1. Commutateur électrique, en particulier interrupteur ou bouton-poussoir comprenant un boîtier (12) comportant des conducteurs de raccordement (16) qui s'y trouvent, comportant des éléments de contact fixes (18, 20, 22) et au moins un élément de contact mobile (14) à rappel automatique et qui est réalisé sous la forme d'un ressort de commutation (14) qui est monté de façon étanche à l'humidité dans le boîtier (12), les éléments de contact fixes (18, 20, 22) étant reliés sous la forme d'une pièce aux conducteurs de raccordement (16) qui sont entourés par injection, ou retenus mécaniquement, dans le boîtier (12), caractérisé en ce que le ressort de commutation (14) qui sert d'élément de contact mobile (14) a une forme de triangle, en ce que la mise en contact avec les éléments de contact fixes (18, 20, 22) est prévue aux points de coin et au milieu de chaque ressort de commutation (14) en forme de triangle, en ce que le ressort de commutation (14) présente des bombements aux endroits prévus pour la mise en contact avec les éléments de contact fixes (18, 20, 22) et en ce que le ressort de commutation (14) est collé, de façon étanche à l'air, au boîtier (12) au moyen d'une feuille adhésive (24).
  2. Commutateur électrique suivant la revendication 1, caractérisé en ce que sont prévus au moins deux ressorts de commutation (14) qui servent pour la mise en contact sélective d'un élément de contact fixe (22) commun.
  3. Commutateur électrique suivant l'une des revendications précédentes, caractérisé en ce que le ressort de commutation (14) entre en contact avec au moins un élément de contact fixe (18, 20, 22) lors d'un actionnement.
  4. Commutateur électrique suivant l'une des revendications précédentes, caractérisé en ce que le ressort de commutation (14) présente une forme de triangle.
  5. Commutateur électrique suivant l'une des revendications précédentes, caractérisé en ce que le ressort de commutation (14) est bombé et est réalisé sous la forme d'un contact à ressort à rappel automatique.
  6. Commutateur électrique suivant l'une des revendications précédentes, caractérisé en ce que les ressorts de commutation (14) présentent des bombements aux endroits prévus pour la mise en contact avec les éléments de contact fixes (18, 20, 22).
  7. Commutateur électrique suivant la revendication 6, caractérisé en ce que les bombements sont formés par des façonnages.
  8. Commutateur électrique suivant l'une des revendications précédentes, caractérisé en ce que le commutateur est réalisé sous la forme d'un commutateur à courte course avec un déplacement de commutation inférieur ou égal à 2 mm.
  9. Commutateur électrique suivant l'une des revendications précédentes, caractérisé en ce que les ressorts de commutation (14) sont collés, de façon étanche à l'air, au boîtier (12) au moyen d'une feuille adhésive (24).
  10. Commutateur électrique suivant l'une des revendications 1 à 9, caractérisé en ce que les conducteurs de raccordement (16) sont retenus dans le boîtier (12) par une liaison par la forme et/ou par la force.
  11. Commutateur électrique suivant l'une des revendications 1 à 10, caractérisé en ce que chaque ressort de commutation (14) peut être actionné par un élément d'actionnement (26), par exemple un bouton à basculer.
  12. Utilisation d'un commutateur électrique suivant l'une des revendications précédentes, dans un commutateur multiple, par exemple dans un commutateur de levage de fenêtre pour des véhicules automobiles.
EP93112752A 1992-08-14 1993-08-09 Commutateur électrique Expired - Lifetime EP0583715B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4226937A DE4226937A1 (de) 1992-08-14 1992-08-14 Elektrisches Schaltgerät
DE4226937 1992-08-14

Publications (2)

Publication Number Publication Date
EP0583715A1 EP0583715A1 (fr) 1994-02-23
EP0583715B1 true EP0583715B1 (fr) 1997-04-09

Family

ID=6465555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93112752A Expired - Lifetime EP0583715B1 (fr) 1992-08-14 1993-08-09 Commutateur électrique

Country Status (3)

Country Link
EP (1) EP0583715B1 (fr)
DE (2) DE4226937A1 (fr)
ES (1) ES2103049T3 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE807837A (nl) * 1973-11-27 1974-03-15 Gte Atea Nv Schakelaar voor druktoetsklavieren en dergelijke en hiermede uitgeruste klavieren
DE2705756C2 (de) * 1977-02-11 1982-09-02 Alps Electric Co., Ltd., Tokyo Druckknopfschalter für elektronische Tischrechner o.dgl.
US4276460A (en) * 1979-05-29 1981-06-30 Texas Instruments Incorporated Printed circuit board switch
DE2931370C2 (de) * 1979-08-02 1983-09-29 Daut & Rietz KG Fabrik für Elektrofeinmechanik GmbH & Co, 8500 Nürnberg Tipptaste
US4331851A (en) * 1980-06-16 1982-05-25 Texas Instruments Incorporated Printed circuit board having data input devices mounted thereon and input devices therefor
CH657227A5 (de) * 1982-11-05 1986-08-15 Fela E Uhlmann Ag Fuer Gedruck Schalterplatte.
DE3441129A1 (de) * 1984-11-10 1986-05-15 Telefunken electronic GmbH, 7100 Heilbronn Mit schaumstoff umspritzter tastschalter
DE3520211A1 (de) * 1985-06-05 1986-12-11 Elektronikus Mérökészülékek Gyára, Budapest Schaltelement mit drei aufsetzpunkten
SU1367061A1 (ru) * 1986-02-14 1988-01-15 Предприятие П/Я Г-4710 Кнопочный переключатель
DE3818562A1 (de) * 1988-06-01 1989-12-07 Swf Auto Electric Gmbh Elektrischer druckknopfschalter, insbesondere zum einschalten eines rueckfahrscheinwerfers eines kraftfahrzeugs
GB2229577A (en) * 1989-03-23 1990-09-26 Well Treasure Ind Ltd Mounting contact elements on printed circuit boards
DD298178A5 (de) * 1989-09-19 1992-02-06 �K�K�K�K@�������`������@�����������@�������k�� Leuchttastschalter

Also Published As

Publication number Publication date
EP0583715A1 (fr) 1994-02-23
ES2103049T3 (es) 1997-08-16
DE59306090D1 (de) 1997-05-15
DE4226937A1 (de) 1994-02-17

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