EP0685108B1 - Commutateur electrique a voyant lumineux - Google Patents

Commutateur electrique a voyant lumineux Download PDF

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Publication number
EP0685108B1
EP0685108B1 EP94908263A EP94908263A EP0685108B1 EP 0685108 B1 EP0685108 B1 EP 0685108B1 EP 94908263 A EP94908263 A EP 94908263A EP 94908263 A EP94908263 A EP 94908263A EP 0685108 B1 EP0685108 B1 EP 0685108B1
Authority
EP
European Patent Office
Prior art keywords
electric switch
circuit board
light
printed circuit
switch according
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
EP94908263A
Other languages
German (de)
English (en)
Other versions
EP0685108A1 (fr
Inventor
Markus Leuschner
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.)
Eaton Controls GmbH and Co KG
Original Assignee
Eaton Controls GmbH and Co KG
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 Eaton Controls GmbH and Co KG filed Critical Eaton Controls GmbH and Co KG
Publication of EP0685108A1 publication Critical patent/EP0685108A1/fr
Application granted granted Critical
Publication of EP0685108B1 publication Critical patent/EP0685108B1/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
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/023—Light-emitting indicators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/023—Light-emitting indicators
    • H01H2013/026—Light-emitting indicators with two or more independent lighting elements located inside the push button switch that illuminate separate zones of push buttons

Definitions

  • the invention relates to an electrical switch with light indicator, which has a spring-loaded switching element which can be actuated by a pushbutton, the switching contacts of which act on connecting contacts arranged in the base of the switch housing, the connecting contacts being connected to at least one lighting element facing the pushbutton and arranged above the switching element.
  • switches have been known for a long time. It is important with these switches that they form a compact assembly which contains contacts and light source integrated, can be assigned in a confined space and, above all, are easy to assemble and ensure reliable operation over a long period of time with little effort.
  • a key with a light indicator for keyboards in office and teleprinters is known in which a side opening for a light-emitting diode is provided on the front of the key button in the viewing area of an operator, the light-emitting diode above and next to one Switching element is arranged.
  • a printed circuit board containing the plug-in device and the power supply for the light-emitting diode, which is pushed into the button.
  • the power supply takes place via flexible power supply cables from a keyboard circuit board, for the implementation of which recesses are provided in the key base, the power supply cables being guided between the recesses and the circuit board in the form of a pivoted loop.
  • the two power supply cables require a relatively large installation space.
  • US-A-34 67 802 shows a push button switch with an electrical connecting member between the movable push button provided with one or more indicator lamps and the housing with the associated switching elements.
  • the connecting link here has the shape of a flat, flexible, non-conductive plastic strip with embedded electrically conductive strips, which hangs in a controlled arc, which does not change its position, between the movable parts to be connected.
  • a flexible conductor foil is used in a movable actuator provided with lighting elements. The assembly effort is considerable.
  • US-A-41 79 594 shows an illuminated pushbutton arrangement with a plurality of light-emitting diodes.
  • the pushbutton arrangement comprises two printed circuit boards which are spaced apart from one another and which are electrically coupled to one another by electrical conductors of high mechanical strength, which simultaneously perform the function of mechanically supporting the two circuit boards with respect to one another. Since the LEDs are thus fixed, an additional space is required for the required actuation area of the push button.
  • the invention has for its object to provide an electrical switch of the type mentioned, which contains the contacts and light source in a compact assembly under the push button, which is modular and easy to install and avoids the susceptibility to contact, even with frequent switch operations.
  • the switch is preferably equipped with functional lighting and search lighting.
  • the search lighting consists of an incandescent lamp and the functional lighting consists of an LED. Both lamps are located with their pins in the solder eyes of the plated-through circuit board and form a preassembled assembly.
  • the circuit board also has plug contacts into which the externally accessible connection contacts of the plug protrude and ensure the secure electrical connection. As an alternative to this, it is also possible, without the plug contacts, to make contact with the holes in the printed circuit board and to plug the connection contacts into the latter.
  • a switching element is guided over the contact holder, which is displaceably arranged in two end positions in the housing and has resilient contacts on opposite sides which, depending on the shifting position of the switching element, tap the connection contacts electrically.
  • the contact On one side of the switching element, the contact consists of a contact roller lying transversely to the direction of displacement and on the other side of a set of several contact springs.
  • a reflector is guided over each light source via the preassembled printed circuit board with light-emitting diode and light bulb, which advantageously consists of a common molded part made of light-reflecting plastic.
  • the upper end of the electrical switch is a pushbutton, which covers the housing with its outer edge and which is positively connected to the switching element by means of several, evenly distributed locking clips and has translucent inserts on the cover side in the area of the incandescent lamp and LED underneath, so that the light can penetrate to the outside.
  • a series resistor which is an SMD resistor, is connected upstream of the light-emitting diode.
  • the circuit board has on its side with the conductor tracks a resistance network that can be easily adapted to the respective application with a bridge.
  • This resistance network is preferably implemented with SMD resistors which do not require any additional space.
  • the switch can be used for recognizable different functions. For example, the luminous color of the LED indicates a certain function.
  • the assembled printed circuit board is connected to the reflector by means of latching clips, so that the printed circuit board and reflector form a preassembled assembly.
  • the electrical switch shown in Fig. 1 and 2 with light indicator consists of the push button 1 with the translucent inserts 2 and 3, a housing 4 with the clamping brackets 5 arranged on the outside in a chassis for mounting the switch and a base 6, which has several latches 7 is attached to the housing 4.
  • a contact switch 8 with embedded connecting contacts 9, the upper ends of which protrude into the plug contacts 10 of a printed circuit board 11.
  • a switching element 12 which can be displaced into two end positions and has spring contacts 13 opposite one another and a contact roller 14.
  • the contact roller 14 and the spring contacts 13 press on the contact holder 8 and, depending on the shift position of the switching element 12, establish the electrical connection for the switching function and also for the associated light source.
  • the switching element 12 is in permanent connection with the pushbutton 1 and is brought into the various desired positions against the action of the compression springs 15 and known switching means.
  • the printed circuit board 11 has an incandescent lamp 18 for the search lighting and a light-emitting diode 17 for the functional lighting.
  • the reflector 16 is placed on the printed circuit board 11 before the pushbutton 1 is installed and secured to the housing 4 by means of latching means.
  • the reflector 16 for the LED 17 and for the incandescent lamp 18 preferably consists of a common molded part made of a light-reflecting plastic.
  • the reflector 16 When the reflector 16 is fastened in the housing 4 as illustrated in FIG. 3, the reflector 16 has a wedge-shaped locking guide 20 which interacts with the resilient locking clips 21 formed on the housing 4. At the same time, locking lugs 22 can be seen, which are resiliently fastened to the switching element 12 and are preferably integrally formed for a positive connection with the pushbutton 1.
  • the switching element 12 has two lateral pins 24 which are guided in elongated holes 23 by tabs 25 attached to the housing 4.
  • FIGS. 5 and 6 Details of the printed circuit board are shown in FIGS. 5 and 6.
  • the lamp connections 26 of the incandescent lamp 18 and the LED 17 are connected to the printed circuit board 11, preferably by soldering in solder eyes, and thus form a preassembled assembly.
  • the plug contacts 10 take up the connecting contacts 9 and secure them electrical continuity.
  • the line diagram shown in FIG. 7 shows the enlarged circuit board from the underside with the pads 26 for connecting the LED and the pads 27 for connecting the incandescent lamp 18.
  • the LED is preceded by a resistor 28, which is preferably an SMD resistor.
  • the series resistor 28 is a resistor network with a plurality of connection points 29 for an electrical bridge 30.
  • FIGS. 9 to 11 shows a mounting of the reflector 16 on the printed circuit board 11 as a preassembled assembly.
  • the reflector 16 has additional latching clips 31 which snap into a recess 32 in the printed circuit board 11.

Landscapes

  • Push-Button Switches (AREA)

Abstract

Un commutateur électrique à voyant lumineux comprend un organe commutateur (12) sollicité par un ressort et actionnable par un bouton-poussoir (1). L'organe commutateur (12) coopère avec des contacts de raccordement (9) qui mènent à l'extérieur du commutateur électrique. Le commutateur électrique comprend au moins un élément lumineux en face du bouton-poussoir (1). Une plaquette de circuits imprimés (11), sur laquelle est prémonté l'élément lumineux (17, 18), est enfichée sur l'extrémité supérieure libre des contacts de raccordement (9). Une diode luminescente (17) est montée sur la plaquette de circuits imprimés (11) pour assurer la fonction d'éclairage et une lampe à incandescence (18) sert d'éclairage de repérage. Le bouton-poussoir (1) du commutateur comprend des insertions transparentes (2 et 3) dans la zone des éléments lumineux.

Claims (9)

  1. Commutateur électrique à voyant lumineux, qui présente un organe de commutation (12) sollicité par un ressort, actionnable par un bouton-poussoir (1), dont les contacts de commutation (13, 14) agissent sur des contacts de branchement (9), placés dans le socle (6) du boîtier (4) du commutateur, les contacts de branchement (9) étant reliés à au moins un élément lumineux (17, 18), orienté vers le bouton-poussoir (1), situé au-dessus de l'organe de commutation (12), caractérisé en ce que
    - les contacts de branchement (9), situés dans le socle (6) du boîtier (4) du commutateur, traversent un porte-contact (8),
    - l'organe de commutation (12) est guidé par l'intermédiaire du porte-contact (8),
    - l'élément lumineux (17, 18) est prémonté sur une carte de circuit imprimé (11) et
    - la carte de circuit imprimé (11) est enfichée sur les extrémités supérieures, dépassant du porte-contact (8) et de l'organe de commutation (12), en direction du bouton-poussoir, des contacts de branchement (9).
  2. Commutateur électrique selon la revendication 1, caractérisé en ce que sur la carte de circuit imprimé (11) sont placées une diode électroluminescente (17) servant d'éclairage de fonction et une lampe à incandescence (18) servant d'éclairage de recherche.
  3. Commutateur électrique selon la revendication 2, caractérisé en ce qu'à chacune des diode électroluminescente (17) et lampe à incandescence (18) est associé un insert translucide (2, 3) dans le bouton-poussoir (1).
  4. Commutateur électrique selon l'une des revendications 2 et 3, caractérisé en ce qu'à chacune des diode électroluminescente (17) et lampe à incandescence (18) est associé un réflecteur (16).
  5. Commutateur électrique selon la revendication 4, caractérisé en ce que le réflecteur (16) pour la diode électroluminescente (17) et la lampe à incandescence (18) est formé en une seule pièce, de préférence en matière plastique.
  6. Commutateur électrique selon l'une des revendications 2 à 5, caractérisé en ce qu'en amont de la diode électroluminescente (17) est connectée une résistance série (28).
  7. Commutateur électrique selon la revendication 6, caractérisé en ce que la résistance série (28) pour la signalisation par diode électroluminescente consiste en un réseau de résistances, qui comporte plusieurs points de liaison (29) pour un pont électrique (30).
  8. Commutateur électrique selon la revendication 7, caractérisé en ce que le réseau de résistances est constitué de résistances SMD.
  9. Commutateur électrique selon l'une des revendications 4 à 8, caractérisé en ce que le réflecteur (16) comporte un ou plusieurs clips d'encliquetage (31), qui s'accroche dans des découpes (32) de la carte de circuit imprimé (11) et présente deux guidages d'encliquetage (20), qui sont en liaison d'encliquetage avec des clips d'encliquetage (21) du boîtier (4).
EP94908263A 1993-02-20 1994-02-19 Commutateur electrique a voyant lumineux Expired - Lifetime EP0685108B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4305349A DE4305349A1 (de) 1993-02-20 1993-02-20 Elektrischer Schalter mit Leuchtanzeige
DE4305349 1993-02-20
PCT/DE1994/000200 WO1994019817A1 (fr) 1993-02-20 1994-02-19 Commutateur electrique a voyant lumineux

Publications (2)

Publication Number Publication Date
EP0685108A1 EP0685108A1 (fr) 1995-12-06
EP0685108B1 true EP0685108B1 (fr) 1997-08-06

Family

ID=6481010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94908263A Expired - Lifetime EP0685108B1 (fr) 1993-02-20 1994-02-19 Commutateur electrique a voyant lumineux

Country Status (3)

Country Link
EP (1) EP0685108B1 (fr)
DE (2) DE4305349A1 (fr)
WO (1) WO1994019817A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4410771B4 (de) * 1994-03-28 2006-08-24 Trw Automotive Electronics & Components Gmbh & Co. Kg Schalter, insbesondere in die Armaturentafel eines Kraftfahrzeuges einbaubarer Schalter, sowie Verfahren zum Herstellen eines Schalters
DE19520243A1 (de) * 1995-06-02 1996-12-05 Abb Patent Gmbh Elektrischer Tastschalter
EP2045656A1 (fr) 2007-10-01 2009-04-08 Siemens Aktiengesellschaft Commutateur doté d'un affichage étendu

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4191871A (en) * 1978-09-12 1980-03-04 Westinghouse Electric Corp. Push-button assembly
DE3014490C2 (de) * 1980-04-16 1985-03-14 SWF Auto-Electric GmbH, 7120 Bietigheim-Bissingen Elektrischer Schalter mit Beleuchtungseinrichtung
DE3131832C2 (de) * 1981-08-12 1986-01-09 SWF Auto-Electric GmbH, 7120 Bietigheim-Bissingen Elektrischer Schalter
US4683359A (en) * 1986-03-13 1987-07-28 Eaton Corporation Illuminated switch assembly with combined light and light shield
GB2242572A (en) * 1990-03-30 1991-10-02 Barcrest Ltd Switch assembly

Also Published As

Publication number Publication date
EP0685108A1 (fr) 1995-12-06
DE59403660D1 (de) 1997-09-11
WO1994019817A1 (fr) 1994-09-01
DE4305349A1 (de) 1994-08-25

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