EP1878033B1 - Contact electroconducteur et procede de fabrication - Google Patents

Contact electroconducteur et procede de fabrication Download PDF

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Publication number
EP1878033B1
EP1878033B1 EP06721946.9A EP06721946A EP1878033B1 EP 1878033 B1 EP1878033 B1 EP 1878033B1 EP 06721946 A EP06721946 A EP 06721946A EP 1878033 B1 EP1878033 B1 EP 1878033B1
Authority
EP
European Patent Office
Prior art keywords
metal
keypad
contact
pill
sponge
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.)
Active
Application number
EP06721946.9A
Other languages
German (de)
English (en)
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EP1878033A1 (fr
Inventor
Christoph Keist
Klaus Hoffmann
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.)
Abatek International AG
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Abatek International AG
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
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Publication of EP1878033A1 publication Critical patent/EP1878033A1/fr
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Publication of EP1878033B1 publication Critical patent/EP1878033B1/fr
Active 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
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/78—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites
    • H01H13/785—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the material of the contacts, e.g. conductive polymers
    • 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
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/78—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites
    • H01H13/79—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the form of the contacts, e.g. interspersed fingers or helical networks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2201/00—Contacts
    • H01H2201/022—Material
    • H01H2201/03—Composite
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2201/00—Contacts
    • H01H2201/022—Material
    • H01H2201/032—Conductive polymer; Rubber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2203/00—Form of contacts
    • H01H2203/008—Wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2203/00—Form of contacts
    • H01H2203/008—Wires
    • H01H2203/01—Woven wire screen
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2203/00—Form of contacts
    • H01H2203/036—Form of contacts to solve particular problems
    • H01H2203/038—Form of contacts to solve particular problems to be bridged by a dome shaped contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2215/00—Tactile feedback
    • H01H2215/004—Collapsible dome or bubble
    • H01H2215/006—Only mechanical function
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/036—Return force
    • H01H2221/042—Foam
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/004—High frequency adaptation or shielding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49105—Switch making

Definitions

  • the present invention relates to a contact element for the intermittent contacting of printed conductors on a printed circuit board, in particular for flexible safety mats or input devices. Furthermore, it relates to a method for the production of flexible safety mats or input devices and uses of such contact elements.
  • Silicone control mats are increasingly used in the automotive sector, such. for switching e.g. Mirror adjusters, window regulators, etc.
  • a flexible mat for example made of silicone over a circuit board is arranged.
  • tracks are arranged, which have interruptions at the points to be actuated.
  • contact elements are arranged on the underside of the flexible mat of silicone and bridging these interruptions, spaced from the circuit board. These contact elements are typically referred to as contact pills. If the flexible mat is pressed down in the right area, contacting takes place.
  • Silicone material is made conductive with carbon or other electrically conductive particles, pressed into plates and punched out and then vulcanized together with the switching mat in the compression tool.
  • a copper sheet is laminated on one side with a silicone layer, on the other with nickel and gold coated. From the sheet then pills are punched, which are vulcanized together with the switching mat in the compression tool.
  • the invention is therefore based on the object to provide an improved flexible switching mat with a contact element for the intermittent contacting of printed conductors on a printed circuit board or a similar carrier with interrupted conductor tracks available. This particular for use for flexible safety mats or input devices, such. B. for the automotive sector.
  • the core of the invention is thus to use a metal sponge, which on the one hand by the existing contiguous network of metal has a well-defined conductivity respectively a well-defined ohmic resistance when the interconnects are bridged. It also has a Metal sponge inherently on a certain flexibility and elastic deformability, which can always ensure a good contact especially with repeated actuation and, for example, oblique actuation. Dirt particles can also be absorbed by the flexibility.
  • the metal sponge is a metal sponge which has a substantially contiguous metallic-based network in order to be able to reliably assume the abovementioned functionality.
  • the metal sponge preferably has a substantially coherent network of cavities (in English so-called metal sponge ) .
  • so-called metal foams in English so-called metallic foams ) in which the cavities do not form a substantially completely coherent network, but rather are in the form of pores.
  • metal sponge is understood to mean that it is a coherent network on a metallic basis, which has cavities in the form of a substantially contiguous network.
  • the cavities of the metal sponge are at least substantially completely filled with an elastomeric material.
  • This design is surprisingly characterized by excellent functionality.
  • the arranged in the cavities elastomeric and thus elastic material causes the thus substantially completely filled metal sponge as a whole receives permanently elastic properties. While an "empty" metal sponge resp. Metal foam especially under heavy mechanical load, if the cavities are not filled with elastic material, and may also be irreversibly deformed, this is no longer possible in such a filled metal sponge due to the arranged in the cavities elastic material. It also prevents the metallic network breaking under load and thus affecting the conductivity. On the other hand, due to the network of metallic material, the conductivity is reliable and always consistent. In this way, a contact element can be made available in an astonishingly simple manufacturing process, which can take over its function excellent long-term even with intensive repeated and even rough use.
  • the contact element is connected in the form of a contact pillar with the switching mat or with an element of the switching mat, wherein the switching mat respectively the element of the switching mat consists of an elastomeric material, and this elastomeric material, the cavities of the metal sponge substantially completely penetrates.
  • the elastomeric material may be a material selected from: silicone elastomer, liquid silicone rubber, liquid silicone rubber, thermoplastic elastomer or rubber. In other words, those materials are used which are typically already used in the field of safety mats.
  • a very simple construction which is characterized by a simple, reliable production process and low production costs, is possible if it is the material of the switching mat in the elastomeric, arranged in the cavities material and to some extent material of the switching mat at least partially penetrates into the contact pellet , The material of the switching mat then penetrates the contact pill at least partially, which on the one hand leads to the contact pill being firmly connected to the switching mat, and on the other hand leads to the contact pill receiving the above-discussed lasting elastic properties.
  • the contact element is in the form of a contact pill whose cavities are at least partially, preferably in at least one surface area, filled with an electrically conductive elastomeric material, wherein it preferably with graphite or metal particles such as z.
  • an electrically conductive elastomeric material preferably with graphite or metal particles such as z.
  • nickel particles offset elastomeric material particularly preferably with graphite or metal particles such as nickel particles offset elastomeric silicone.
  • An increase in the conductivity can also be achieved by the contact element being in the form of a contact pill, and the contact pill on the surface facing the strip conductors is provided with an additional metallic coating, in particular of gold or chromium.
  • contact pill In connection with the term contact pill it must be specified that these may be circular, to some extent circular cylindrical elements, but that they may also be oval, hexagonal, square, rectangular or any other basic shapes. Typically, the contact pill is a circular contact element.
  • the material of the metal sponge is preferably a metal selected from the group: nickel, chromium, gold, aluminum, copper or alloys or mixtures formed therefrom. Also foams or sponges, which are stratified of different metals, are possible.
  • Such sponges can be produced for example in a deposition process (CVD, chemical vapor deposition), wherein a plastic foam is coated with metal and then the plastic is removed, so that a contiguous metal sponge with coherent cavities formed.
  • metal foams resp.
  • Metal sponges with an average pore size in the range of 100-1000 ⁇ m, preferably in the range of 550-700 ⁇ m, particularly preferably in the range of 600-650 ⁇ m.
  • the contact element is preferably in the form of a contact pill with a thickness in the range of 0.5-3 mm, preferably in the range of 0.5-0.9 mm.
  • the metal sponge advantageously has a density in the range of 200-800 g / m 2 , particularly preferably in the range of 300-500 g / m 2 , based on a material thickness of 1.6 mm.
  • the present invention relates to a method for producing a switching mat or an element of a switching mat (eg, silicone dome), as described above.
  • the method is characterized in that such a contact element is inserted into a compression tool, an injection molding tool or a transfer molding tool, preferably at recesses provided for the contacts, then an elastomer mixture is inserted or supplied and / or injected, and when closed Tool pressure and temperature can be adjusted in the tool so that the elastomer is low viscosity and at least partially penetrates into the metal sponge.
  • Pressure and temperature in the tool are preferably set such that the Elastomer substantially completely penetrates into the metal sponge of the contact element in the form of a contact pill.
  • the contact element can be presented in the form of a contact pill, which are produced from a metal sponge plate in a stamping process or a cutting process, in which preferably a partial compression of the metal sponge is effected.
  • the contact pill and / or the metal sponge plate can be filled before or after the stamping process at least partially with an electrically conductive or non-conductive elastomeric material or coated by a squeegee, pressure or spray method, or with an additional metallic coating, in particular of gold or chromium be provided. If the metal sponge plate is already filled with an elastomeric material, such a contact element can then also be glued or otherwise connected to the corresponding points of a switching mat (for example, from below onto a silicone dome).
  • the present invention relates to the use of a safety mats or in elements resp.
  • Components for safety mats or input devices such as keyboards, or input devices especially from the automotive sector such as windows, mirrors, and / or for direct connection of motors.
  • the latter is possible since the contact elements according to the invention can reliably switch comparatively high currents.
  • a metal foam or metal sponge may be used as a flexible contact sheet in elastomer such as e.g. embedded in silicone. So as a flexible touchpad.
  • the present invention is to be understood in particular in connection with safety mats, as initially generally referred to the hand FIGS. 1 and 2 be explained should.
  • FIG. 1 shows a section through the switching area of a switching mat.
  • a circuit board 1 printed conductors 2, 3 are provided. These traces are interrupted at a defined location, and at this point should be made possible by a manual input (pressing iS a keyboard) from above a contact, that is a bridging of the two tracks 2, 3.
  • a switching mat which consists in this specific case of a plastic cap 4, below which are arranged in each case in the switching areas flexible elements, for example made of silicone.
  • These flexible elements consist of a silicone dome 5, which is connected to the top with the plastic cap 4. Laterally next to the interruption of the printed conductors, this dome 5 is supported on the printed circuit board via a membrane 5a with the switching mat base 6.
  • the dome 5, the diaphragm 5a and the base 6 are integrally made of a flexible material. Such an element is also called a silicone button.
  • a contact pill 7 is attached.
  • the plastic cap 4 is pressed from above, for example, with a finger down, takes place after reaching a threshold force Einknichen the membrane 5a, and the contact pill 7 is printed on the circuit board 1 respectively to the two from the left respectively from the right conductor tracks 2, 3rd pressed down. Since the contact pill is a conductive element, for example a carbon pill or a gold pill, the conductors 2 and 3 are thus connected to one another and a circuit is effected. After releasing the silicone dome speeds due to the elasticity of the material in the membrane 5a back to its original, in FIG. 1 shown position, which causes the connection is interrupted again, since the contact pill is removed upward from the contact area.
  • FIG. 2a shows a plan view of such a switching element, which consists of a diaphragm 17, which, as in FIG. 2b ), has circular recesses. Grab through these recesses from below two buttons 18 through. It is possible that a plastic cap 4 is glued or laid over the keys.
  • the switching mat consists in this case of two actual switching elements, as in the Figures 2c 2e) in a perspective view, and in FIG. 2f), a section along the dotted line in FIG Figure 2c ) can be seen.
  • FIG. 2d Below this switching mat 4 is in Figure 2d ) shown arranged on which two separate conductor paths are arranged, which in each case underneath the keys 18 via Maisier Anlagene 20, that is in these areas 20, the conductors are interrupted and should be bridged by the contact pills 7 of the switching mat, if the switching mat is operated accordingly.
  • the switching mat is made of a flexible elastic material such as silicone rubber and consists of one piece Dom 5, a diaphragm 5a and the base 6, wherein between the base and the dome, a free-standing cavity is formed, in which from below the contact pills 7 are attached.
  • a flexible elastic material such as silicone rubber
  • the aim of the present invention is, so to speak, to find a solution which combines the advantages of the two technologies mentioned above of the carbon pill and the gold pill and at the same time eliminates their disadvantages. That The softness of the carbon pill (dirt is trapped, low in price) should be combined with the electrical properties of the gold pill (very low contact resistance, independent of actuation force).
  • a metal sponge as the material for the contact pill 7, preferably a nickel-metal sponge having a porosity of, for example, 100 PPI (pores per inch) and a density of, for example, 400 gr / m 2 at a thickness of typically 1.6 mm used. This is schematically in FIG. 3a ).
  • the sponge pills are placed in the compression tool on the recesses provided for the contacts, then an elastomer mixture is inserted or injected respectively. fed, and the tool closed. Due to the pressure (typically 150kg / cm 2 ) and the temperature in the tool (typically 170 ° C), the elastomer becomes low in viscosity and at least partially infiltrates the metal sponge. At the same time, the metal sponge is compressed by the pressure in the compression tool and forms a fairly homogeneous surface, partly interspersed with elastomer, on the lower side. This surface now serves as a contact element, the sponge as a "net” not only leads to the surface, but over the whole pill.
  • Such metal sponge pills have approximately the electrical properties of the gold pills, without being susceptible to dirt, and are cheap to manufacture.
  • the metal sponge pill is a metal sponge-punched or cut-out pill, which is otherwise unmodified. This situation is in FIG. 3b ).
  • This electrically conductive metal sponge or foam is vulcanized in the tool with insulating silicone or otherwise applied to the keypad, eg by gluing, clamping, etc.
  • the metal sponge pill is already at least partially with elastomeric material, which may be non-conductive or additionally electrically conductive prior to its attachment to the keypad or their integration into the switching mat.
  • the metal foam is completely or partially filled with an electrically conductive or non-conductive material. This can be for example with graphite or metal dust offset silicone.
  • Such a completely filled with metal sponge pill is in Figure 3c ) shown schematically. From these plates, the pills are then made.
  • the metal sponge pill is additionally coated for better conductivity at least on the side facing the contacts, that is to say the printed conductors.
  • the metal sponge is coated with electrically conductive material on one or both sides.
  • the coating can For example, be carried out with a doctor blade or spray method. Such a coating 10 is shown schematically in FIG 3d figure ).
  • the metal sponge pill is refined.
  • the metal sponge can be coated on one, both sides or throughout additionally with gold or another high-grade layer in order to increase the conductivity and to reduce the burnup.
  • the metal foam pill is gilded by steaming or electroplating etc. for example. This can be done on all variants on one or both sides.
  • the punched pills may be coated in a drum. Such an embodiment in combination with a coating 10 is shown schematically in FIG FIG. 3e ).
  • conductive metal foams and metal sponges are preferred.
  • Such metal sponges are made, for example, of nickel, nickel coated e.g. with chromium or gold, aluminum, copper, etc. Different pore sizes can be used, typically 400 ⁇ m.
  • FIG. 4 A possible method for producing such contact pills 7 from a metal sponge plate 14 is shown in FIG. 4 shown.
  • the punching tool 12 has at its tip a tapered on the outside taper, which leads to the actual cutting edge.
  • the metal sponge plate 14 is placed on a soft pad 15, and the punch 12 is inserted punched with retracted punch 13 into the metal sponge plate 14.
  • the punching tool 12, 13 is moved and, as in FIG. 4d ), the punched product 16, respectively the contact pill, with the ejector 13 removed from the punching tool 12 and collected, for example, in a container or even inserted into a mold.
  • FIG. 5 In addition, another possibility of using such a metal sponge or a metal foam is shown.
  • a flexible mat 21 made of an elastomer in the concrete case of silicone, two conductors 2 and 3 made of metal foam or metal sponge are embedded in such a way and penetrated by the elastomer or silicone, respectively, that they are guided over one another in one area. Between the two conductors, a cavity 22 is present in this area.
  • the conductors are connected at the points 24 with appropriate electronics or circuits, and is now in a schematically shown key area 23 from above (or equally from below) exerted a pressure on this mat 21, so contact the two conductors 2, 3rd due to the flexibility of the mat 21 and thus provide a key function.
  • Such a mat can in turn be produced by presenting the conductors, for example, as unfilled metal foams or metal sponges in a mold, and then the elastomer to form the structure according to FIG FIG. 5 is supplied.
  • Electrically conductive or non-conductive elastomers can be applied in processes such as doctor blade, spray, screen printing, pad printing, etc.
  • Dow Corning 3631 liquid silicone may be used as a base material for coating or as a flexible filler.
  • conductive particles e.g. Nickel-coated carbon particles can be used by Inco Special Products.
  • Xyshield Type XY800 Nickel Plated Graphite from Laird Technologies can be used as a paste for a coating (base material + particles ready mixed.
  • HTV silicone possibly with color pigments; e.g. Type B6670, 30-80 Shore A, 70 Shore A preferred, to be used by Dow Corning. .
  • Materials such as gold, chromium, etc. can be applied in processes such as sputtering, vapor deposition, electroplating, etc.
  • HTV silicone elastomer is used for mats, but the present invention can also be implemented with liquid silicone liquid silicone rubber (LSR), thermoplastic elastomers (TPE) or rubber of any kind.
  • LSR liquid silicone liquid silicone rubber
  • TPE thermoplastic elastomers

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  • Push-Button Switches (AREA)
  • Contacts (AREA)
  • Manufacture Of Switches (AREA)

Claims (16)

  1. Une natte de commutation flexible (4-6) ayant un élément de contact (7) pour la mise en contact intermittente de pistes conductrices (2, 3) sur une plaque conducteur, dans laquelle l'élément de contact en forme d'une pastille de contact (7) est connecté à une natte de commutation (4-6) ou un élément (5, 6) d'une natte de commutation, et dans laquelle la natte de commutation (4-6), respectivement l'élément (5, 6) de la natte de commutation, consiste d'un matériau élastomère,
    caractérisée en ce que
    l'élément de contact consiste d'une éponge métallique (8) ou d'une mousse métallique, dans laquelle les cavités de l'éponge métallique (8), respectivement de la mousse métallique, sont essentiellement complètement remplies de matériau élastomère de la natte de commutation (4-6), respectivement de l'élément (5, 6) de la natte de commutation.
  2. La natte de commutation (4-6) selon la revendication 1, caractérisée en ce que l'éponge métallique est une éponge métallique qui a un réseau essentiellement cohérant à base métallique ainsi que en même temps un réseau essentiellement cohérant de cavités.
  3. La natte de commutation (4-6) selon une des revendications précédentes, caractérisée en ce que le matériau élastomère est un matériau choisi de: élastomère de silicone, caoutchouc liquide de silicone, gomme liquide de silicone, élastomère thermoplastique ou gomme.
  4. La natte de commutation (4-6) selon une des revendications précédentes, caractérisée en ce que le matériau élastomère disposé dans les cavités est un matériau de la natte de commutation (4-6).
  5. La natte de commutation (4-6) selon une des revendications précédentes, caractérisée en ce que l'élément de contact prend la forme d'une pastille de contact (7), les cavités de laquelle sont au moins partiellement remplies, préférablement au moins dans une région de surface, avec un matériau élastomère conducteur électrique, où il s'agit préférablement d'un matériau élastomère chargé de graphite ou de particules métalliques, comme par exemple des particules de nickel, en particulier préférablement un élastomère de silicone chargé de graphite ou de particules métalliques, comme par exemple des particules de nickel.
  6. La natte de commutation (4-6) selon une des revendications précédentes, caractérisée en ce que l'élément de contact prend la forme d'une pastille de contact (7), et en ce que la pastille de contact est pourvue, sur la surface faisant face aux pistes conductrices, avec un revêtement métallique additionnel, en particulier en or ou chrome.
  7. La natte de commutation (4-6) selon une des revendications précédentes, caractérisée en ce que le matériau de l'éponge métallique (8), respectivement de la mousse métallique, est un métal choisi du groupe : nickel, chrome, or, aluminium, cuivre ou alliage de ceux-ci.
  8. La natte de commutation (4-6) selon une des revendications précédentes, caractérisée en ce que l'éponge métallique (8), respectivement la mousse métallique, a une taille de pore moyenne dans le domaine de 100 à 1000 µm, préférablement dans le domaine de 550 à 700 µm, en particulier préférablement dans le domaine de 600 à 650 µm.
  9. La natte de commutation (4-6) selon une des revendications précédentes, caractérisés en ce que l'élément de contact en forme de pastille de contact (7) est formé à une épaisseur dans le domaine de 0,5 à 3 mm, préférablement dans le domaine de 0.6 à 0.9 mm.
  10. La natte de commutation (4-6) selon une des revendications précédentes, caractérisée en ce que l'élément de contact consiste d'une éponge métallique (8) ayant une densité dans le domaine de 200 à 800 g/m2, en particulier préférablement dans un domaine de 300 à 500 g/m2, en référence à une épaisseur de matériau de 1.6 millimètres.
  11. Un procédé pour produire une natte de commutation (4-6), selon une des revendications précédentes, caractérisé en ce que l'élément de contact est placé dans un outil de moulage à compression, un outil de moulage par injection ou un outil de moulage par transfert, préférablement sur une empreinte prévue pour les contacts, un mélange d'élastomères est ensuite conduit, respectivement placé dans, et avec l'outil fermé, la pression et température dans l'outil sont réglées de telle façon à ce que l'élastomère devienne faiblement visqueux et pénètre au moins partiellement dans l'éponge métallique.
  12. Le procédé selon la revendication 11, caractérisé en ce que la pression et température dans l'outil de moulage sont réglées de manière à ce que l'élastomère pénètre essentiellement complètement dans l'éponge métallique (8), respectivement la mousse métallique, de l'élément de contact en forme de pastille de contacte (7).
  13. Le procédé selon une des revendications 11 ou 12, caractérisé en ce que l'élément de contact (7) est présent sous forme de pastille de contact ayant été produite à partir d'une plaque en éponge métallique (14), respectivement à partir d'une plaque en mousse métallique, dans un procédé de poinçonnage dans lequel préférablement une compression partielle de l'éponge métallique, respectivement de la mousse métallique, est entraînée.
  14. Le procédé selon la revendication 13, caractérisé en ce que la pastille de contact (7) et ou la plaque en éponge métallique (14), respectivement la plaque en mousse métallique, est au moins partiellement remplie, ou revêtue à travers d'un procédé de raclage, impression ou vaporisation, avec un matériau élastomère conducteur électrique ou non-conducteur avant, respectivement après, le procédé de poinçonnage, ou est pourvue d'un revêtement métallique additionnel, en particulier en or ou chrome.
  15. Utilisation d'une natte de commutation selon une des revendications 1 à 10, comme un clavier, ou dispositif d'entrée en particulier du secteur automobile, comme un lève-vitre, ajusteur de miroir, et/ou la commutation directe de moteurs.
  16. Utilisation d'une natte de commutation selon une des revendications 1 à 10 pour réaliser une fonction de touche dans un bracelet en silicone flexible.
EP06721946.9A 2005-05-06 2006-05-04 Contact electroconducteur et procede de fabrication Active EP1878033B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH8082005 2005-05-06
PCT/CH2006/000244 WO2006119657A1 (fr) 2005-05-06 2006-05-04 Contact electroconducteur et procede de fabrication

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EP (1) EP1878033B1 (fr)
JP (1) JP5085535B2 (fr)
CN (1) CN101171654B (fr)
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WO (1) WO2006119657A1 (fr)

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CN102280291A (zh) * 2010-06-11 2011-12-14 鸿富锦精密工业（深圳）有限公司 按键可更换位置的键盘
US20120068934A1 (en) * 2010-09-17 2012-03-22 Microsoft Corporation Interactive keyboard with viewable display
CN102623196B (zh) * 2011-01-26 2014-11-26 南通万德科技有限公司 橡胶导电粒及其制备方法
FR2977042B1 (fr) * 2011-06-27 2013-09-13 Dav Dispositif de commande a surface tactile
KR101339166B1 (ko) * 2012-06-18 2013-12-09 주식회사 아이에스시 관통공이 형성된 도전성 입자를 가지는 검사용 소켓 및 그 제조방법
TW201515037A (zh) * 2013-10-11 2015-04-16 jin-xiong Chu 具有顯示播放功能之開關結構
TW201419343A (zh) * 2014-01-10 2014-05-16 Zhi Kang Ind Co Ltd 背光模組之結構
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Publication number Publication date
CA2607408A1 (fr) 2006-11-16
US7964810B2 (en) 2011-06-21
EP1878033A1 (fr) 2008-01-16
CA2607408C (fr) 2013-06-11
WO2006119657A1 (fr) 2006-11-16
US20090068857A1 (en) 2009-03-12
JP5085535B2 (ja) 2012-11-28
MX2007013864A (es) 2008-01-24
JP2008541342A (ja) 2008-11-20
CN101171654A (zh) 2008-04-30
CN101171654B (zh) 2010-11-24

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