EP1656685A1 - Composant electronique, en particulier interrupteur electrique - Google Patents

Composant electronique, en particulier interrupteur electrique

Info

Publication number
EP1656685A1
EP1656685A1 EP04764325A EP04764325A EP1656685A1 EP 1656685 A1 EP1656685 A1 EP 1656685A1 EP 04764325 A EP04764325 A EP 04764325A EP 04764325 A EP04764325 A EP 04764325A EP 1656685 A1 EP1656685 A1 EP 1656685A1
Authority
EP
European Patent Office
Prior art keywords
base
cover
electrical
contact
actuating member
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
EP04764325A
Other languages
German (de)
English (en)
Other versions
EP1656685B1 (fr
Inventor
Axel Rastemborski
Bernd Hellbeck
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
DaimlerChrysler AG
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 DaimlerChrysler AG, Marquardt GmbH filed Critical DaimlerChrysler AG
Publication of EP1656685A1 publication Critical patent/EP1656685A1/fr
Application granted granted Critical
Publication of EP1656685B1 publication Critical patent/EP1656685B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/48—Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs
    • 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
    • H01H13/04—Cases; Covers
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
    • 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
    • H01H2001/5888—Terminals of surface mounted devices [SMD]

Definitions

  • the invention relates to an electrical component, in particular an electrical switch according to the preamble of patent claim 1 or 2.
  • Such electrical switches which can be designed in the manner of a short-stroke key, are used above all as switching elements in keyboards, control panels or the like.
  • an electrical switch in the form of a short-stroke key with a housing is known, a contact system being located in the housing.
  • the switch also has an actuator for acting on the contact system.
  • the housing consists of a base and a cover, the flat cover being attached to the top of the base.
  • a disadvantage of this switch has been the complex fastening of the cover.
  • the housing is not sealed against pollutants, so that the switch is susceptible to errors.
  • an electrical switch is known from EP 0 743 663 AI, in which the cover is slipped onto the base. As a result, the cover overlaps the base on the top and at least partially on the side surface.
  • the cover is fastened by means of latching tabs by latching onto latching lugs which are located on one side surface of the base. This fastening of the lid is also complex and prone to errors.
  • the laterally projecting locking lugs on the base are disadvantageous, which above all make a large size of the base necessary.
  • the object of the invention is to improve the electrical component, in particular the electrical switch, with regard to the design of the housing.
  • the cover should be mountable on the base of the electrical switch in a simple and fail-safe manner.
  • the base has at least one recess on the underside facing away from the cover.
  • a tab-like extension on the cover engages in this recess in the manner of a border so that the extension is completely accommodated in the base.
  • the edging is easy to carry out in terms of production technology. Nevertheless, a reliable attachment of the cover to the base is achieved, the housing being largely sealed against the ingress of pollutants. Since the projection protruding into the recess is at best flush with the underside of the base, that is to say in particular does not protrude beyond the underside of the base, the switch is advantageously easy to mount on a carrier, a printed circuit board or the like due to its flat lower surface. Further embodiments of the invention are the subject of the dependent claims.
  • the cover and the base of the electrical component and / or the electrical switch usually have an approximately rectangular shape with four sides. It then makes sense that four lugs on the cover engage in four corresponding recesses on the base, as a result of which a secure and sufficient attachment of the cover to the base is achieved.
  • the lugs and the recesses are expediently assigned approximately in the middle to the four sides of the cover and the base.
  • the attachment on the cover can be designed in the manner of a flanged tab extending from the side surface to the underside.
  • the contact system of the switch consists, in a manner known per se, of fixed contacts and a switch contact which can be actuated by means of the actuating member.
  • the fixed contacts can be located on the top of the base in the housing. So that the switch is small, the switch contact can be designed as a snap disk for bridging the fixed contacts. A particularly good tactile feeling for the user can be achieved by the snap disk being made of metal.
  • Electrical connections which are in electrical connection with the fixed contacts are arranged on the underside of the base. If the switch is designed to be illuminated, there is a light-emitting element in the housing, for example a light-emitting diode.
  • the electrical connections for the lighting element are also arranged on the underside of the base.
  • SMD Surface Mounted Device
  • a circuit board can be used as a base for the switch in a particularly simple and inexpensive manner.
  • the fixed contacts can then be formed as conductor track surfaces on the top of the circuit board serving as a base.
  • the electrical connection from the electrical connection on the underside of the base to the fixed contact on the top of the base is configured by means of a conductor track and / or a via. This means that the fixed contacts and the electrical connections can be established using proven and reliable circuit board technology.
  • the actuator has a push button protruding from the housing and an edge surface resting on the top of the base.
  • the push button is connected to the edge surface via an elastically foldable bellows. Furthermore, the push button acts on the switching contact by means of an attachment.
  • such an embodiment saves on components, since the entire functionality of the actuating member is realized by means of one part.
  • the switch is also on the top of the Sealed housing by means of the actuator, which prevents pollutants from entering the switch.
  • the actuating member at least partially, in particular its edge surface and its bellows, consists of elastomeric plastic.
  • elastomeric plastic silicone can be used as the elastomeric plastic.
  • the push button is at least partially made of a hard plastic, particularly on its actuating surface. The actuator can then be inexpensively manufactured in a two-component technique from the elastomer and the hard plastic.
  • the lid can be made of metal.
  • the cover is then designed in the manner of a frame with an opening, such that the frame on the one hand engages over the edge surface of the actuating member in a profile-like manner and holds it on the base and on the other hand allows passage for the bellows of the actuating member.
  • the cover advantageously fulfills the function of receiving further components of the switch, in particular the actuating member, and fastening them to the base by means of a pressing pressure. This pressure also ensures a tight connection.
  • the snap disk forming the switch contact is provided with a hole.
  • the lighting element is arranged in the area of the hole on the top of the base, such that the light emitted by the lighting element can at least partially pass through the hole in the snap disk.
  • the switch is designed to be very compact despite additional lighting.
  • the actuating member consists at least partially of translucent material.
  • the snap disk is in electrical contact with the one fixed contact by means of a support surface opposite the hole.
  • the other fixed contact is ring-shaped and arranged around the hole corresponding to the edge.
  • the lighting element is located approximately in the middle of the ring-shaped fixed contact.
  • the edge around the hole on the snap disc is raised compared to the contact surface.
  • the approach on the push button is ring-shaped, the approach with the raised edge around the hole of the snap disc cooperates to operate it. As a result, the raised edge snaps into engagement with the annular fixed contact when the snap disk is actuated by the actuating member.
  • Such a configuration ensures a space-saving arrangement of the lighting element.
  • the electrical switch has only a small overall height and can therefore be used as a short-stroke key.
  • the switch is easy to process, in particular SMD (Surface Mounted Device), and can therefore be used in a user-friendly and inexpensive manner in control panels.
  • SMD Surface Mounted Device
  • the housing of the switch is largely sealed, which effectively prevents the ingress of pollutants into the housing.
  • the soldering process for the switch on a carrier, for example in the control panel does not result in any loss of function. Above all, exposure to a temperature of 260 ° C for at least 30 seconds is not harmful to the switch, which means that the switch can be processed in SMD (Surface Mounted Device) technology.
  • the invention makes it possible to use a printed circuit board for the base of the electrical component and / or the electrical switch and to connect this to the cover and, if appropriate, further components.
  • the printed circuit board in turn offers the advantage of combining connecting surfaces, electrical connections, contact surfaces and bottom part of the electrical component and / or of the electrical switch in one component in a cost-effective manner.
  • FIG. 3 shows a longitudinal section through the electrical switch in FIG. 1, 4 shows the longitudinal section from FIG. 3 in a perspective view,
  • Fig. 5 shows the longitudinal section of Fig. 3 in a different perspective
  • Fig. 6 shows the underside of the electrical switch.
  • an electrical switch 1 can be seen in a perspective view, which is designed in the manner of a short-stroke key.
  • a switch 1 is particularly suitable for use in control panels for motor vehicles, for household appliances, for other electrical devices or the like.
  • the switch 1 has a housing 2. In the housing 2 there is a contact system 5 visible in FIG. 2. Furthermore, the switch 1 has an actuating element 6 which serves for the manual switching action on the contact system 5 by the user.
  • the housing 2 consists of a base 3 and a cover 4, the cover 4 being attached to the base 3. For this purpose, the cover 4 overlaps the base 3 on the top 7 and on the side surface 9 at least partially, as can be seen from FIG. 3.
  • the base 3 has at least one recess 10 on the underside 8 facing away from the cover 4.
  • a recess 11 in the form of a tab engages in the recess 10 on the cover 4 in such a way that the extension 11 is completely accommodated in the base 3. The approach 11 is therefore not over the bottom 8 of the base 3, but is at best flush with the bottom 8 of the base 3, which is clearly visible in FIG. 3.
  • each side surface 9 of the base 3, which is approximately rectangular or square, is assigned a recess 10, so that the switch 1 has a total of four recesses 10.
  • the rectangular or square cover 4 thus also has four corresponding lugs 11 for engaging in the recesses 10 in the manner of a border.
  • the lugs 11 and the recesses 10 are assigned approximately centrally to the four sides of the cover 4 and the base 3. The bordering by means of the from the side surface 9 to the bottom 8th reaching tab-like approach 11 causes the lid 4 to be securely attached to the base 3.
  • the contact system 5 consists of fixed contacts 12, 13 and a switch contact 14 which can be actuated by means of the actuating member 6.
  • the fixed contacts 12, 13 are located on the top 7 of the base 3 in the housing 2.
  • the switching contact 14 is designed as a snap disk for bridging the fixed contacts 12, 13.
  • the snap disk 14 can be made of metal.
  • the base 3 consists of a printed circuit board. Electrical connections 15, 16 visible in FIG. 6, which are in electrical connection with the fixed contacts 12, 13, are arranged on the underside 8 of the base 3. Further electrical connections 18 for a lighting element 17 located in the housing 2 are likewise arranged on the underside 8 of the base 3.
  • the lighting element 17 can be, for example, a light-emitting diode.
  • the electrical connections 15, 16, 18 are designed in the manner of soldering areas, such that the switch 1 can be processed using SMD (Surface Mounted Device) technology.
  • the fixed contacts 12, 13 are designed as conductor track surfaces on the upper side 7 of the base 3, as can be seen from FIG. 2.
  • the electrical connection from the electrical connection 15, 16, 18 on the underside 8 of the base 3 to the fixed contact 12, 13 on the upper side 7 of the base 3 is configured by means of a conductor track 19 and / or a via 20.
  • the actuating element 6 has a push button 21 protruding from the housing 2 and an edge surface 23 resting on the upper side 7 of the base 3.
  • the push button 21 is connected to the edge surface 23 via an elastically foldable bellows 22.
  • the pushbutton 21 acts on the switch contact 14 by means of an attachment 24.
  • the actuating member 6 consists at least partially, in particular its edge surface 23 and its bellows 22, made of an elastomeric plastic, for example of silicone.
  • the push button 21 consists at least partially, in particular on its actuating surface 25, of a hard plastic. It is then appropriate that the actuator 6 is made by injection molding in a two-component technique from elastomeric and hard plastic.
  • the cover 4 which is made of metal, is designed in the manner of a frame with an opening 26, as shown in more detail in FIG. 2.
  • the frame 4 overlaps the edge surface 23 of the actuating member 6 in a profile-like manner and holds it firmly on the base 3.
  • the frame 4 allows the bellows 22 of the actuating member 6 to pass through the opening 26. Because of the bordering by means of the tab-like projections 11, the frame 4 thus exerts a certain contact pressure on parts located in the housing 2 for their secure attachment. In addition, this also ensures a seal into the interior of the housing 2, which can be further improved by a sealing lip 30 on the edge surface 23 that is visible in FIG. 4 or 5.
  • the electrical switch 1 is designed to be illuminable, for which purpose a lighting element 17 is located on the printed circuit board 3. 2, the snap disk forming the switching contact 14 is provided with a hole 27, and the lighting element 17 is arranged in the region of the hole 27 on the top 7 of the base 3, such that the light emitted by the lighting element 17 is at least partially by the Hole 27 in the snap disc 14 can pass through.
  • the actuator 6 is at least partially made of translucent material so that the emitted light is visible to the user.
  • the snap disk 14 is in electrical contact with the one fixed contact 12 by means of a contact surface 28 opposite the hole 27.
  • the other fixed contact 13 is, as can be seen above all from FIG. 2, in the form of a ring and arranged corresponding to the edge 29 around the hole 27 on the snap disk 14.
  • the lighting element 17 is arranged approximately in the middle of the annular fixed contact 13.
  • the edge 29 around the hole 27 on the snap disk 14 is raised in accordance with FIG. 3 with respect to the contact surface 28.
  • the neck 24 on the push button 21 is also designed in a ring.
  • the projection 24 interacts with the raised edge 29 around the hole 27 of the snap disk 14 for its actuation, such that the raised edge 29 snaps into engagement with the annular fixed contact 13 when the snap disk 14 is actuated by the actuating member 6.
  • the two fixed contacts 12, 13 are consequently bridged by the snap disk 14.
  • the raised edge 29 is removed from the fixed contact 13, and thus the electrical connection between the two fixed contacts 12, 13 is interrupted.
  • the invention is not restricted to the exemplary embodiment described and illustrated. Rather, it also includes all professional developments within the scope of the invention defined by the claims. Thus, this can not only be used for an electrical switch as described, but can also be used on other electrical components, such as capacitors, resistors, coils or the like, which have a housing consisting of a base and a cover.
  • the cover overlaps the base on the upper side and on the side surface at least partially, and the base has recesses on the underside facing away from it, in which approaches on the cover engage in the manner of a border so that the approaches in The base is fully absorbed and does not protrude beyond the bottom of the base.

Landscapes

  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Electronic Switches (AREA)

Abstract

L'invention concerne un interrupteur électrique (1), notamment du type à touche à course réduite. L'interrupteur (1) comprend un socle (3) et un boîtier formant couvercle (4), le couvercle (4) étant fixé sur le socle (3). Il est prévu dans le boîtier un système à contact (5) sur lequel on peut agir pour effectuer une connexion au moyen d'un organe de commande (6). Le socle (3) présente, sur la partie inférieure (8) opposée au couvercle (4), un évidement (10). Le couvercle (4) recouvre le socle (3) sur la partie supérieure (7) ainsi que sur la surface latérale (9), au moins partiellement, et une patte (11) sur le couvercle (4) s'engage, à la manière d'un bord rabattu, dans l'évidement (10), de telle façon que la patte (11) soit complètement logée dans le socle (3) et, de toute façon, affleure la face inférieure (8) du socle (3).
EP04764325A 2003-08-23 2004-08-20 Composant electronique, en particulier interrupteur electrique Expired - Lifetime EP1656685B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10338903 2003-08-23
PCT/EP2004/009341 WO2005020260A1 (fr) 2003-08-23 2004-08-20 Composant electronique, en particulier interrupteur electrique

Publications (2)

Publication Number Publication Date
EP1656685A1 true EP1656685A1 (fr) 2006-05-17
EP1656685B1 EP1656685B1 (fr) 2009-11-11

Family

ID=34201960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04764325A Expired - Lifetime EP1656685B1 (fr) 2003-08-23 2004-08-20 Composant electronique, en particulier interrupteur electrique

Country Status (7)

Country Link
US (1) US7485824B2 (fr)
EP (1) EP1656685B1 (fr)
JP (1) JP4716988B2 (fr)
CN (1) CN100568432C (fr)
AT (1) ATE448559T1 (fr)
DE (2) DE102004040395A1 (fr)
WO (1) WO2005020260A1 (fr)

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Also Published As

Publication number Publication date
US7485824B2 (en) 2009-02-03
US20060201797A1 (en) 2006-09-14
CN1842883A (zh) 2006-10-04
WO2005020260A1 (fr) 2005-03-03
DE102004040395A1 (de) 2005-03-24
JP2007503687A (ja) 2007-02-22
EP1656685B1 (fr) 2009-11-11
ATE448559T1 (de) 2009-11-15
DE502004010356D1 (de) 2009-12-24
JP4716988B2 (ja) 2011-07-06
CN100568432C (zh) 2009-12-09

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