WO1998031027A1 - Dispositif de commande electrique - Google Patents

Dispositif de commande electrique Download PDF

Info

Publication number
WO1998031027A1
WO1998031027A1 PCT/DE1998/000038 DE9800038W WO9831027A1 WO 1998031027 A1 WO1998031027 A1 WO 1998031027A1 DE 9800038 W DE9800038 W DE 9800038W WO 9831027 A1 WO9831027 A1 WO 9831027A1
Authority
WO
WIPO (PCT)
Prior art keywords
push button
switching device
electrically conductive
circuit board
housing
Prior art date
Application number
PCT/DE1998/000038
Other languages
German (de)
English (en)
Inventor
Klaus Mayer
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1998031027A1 publication Critical patent/WO1998031027A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/22—Secondary treatment of printed circuits
    • H05K3/24—Reinforcing the conductive pattern
    • H05K3/245—Reinforcing conductive patterns made by printing techniques or by other techniques for applying conductive pastes, inks or powders; Reinforcing other conductive patterns by such techniques
    • H05K3/247—Finish coating of conductors by using conductive pastes, inks or powders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/029—Composite material comprising conducting material dispersed in an elastic support or binding material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/03—Conductive materials
    • H05K2201/0302—Properties and characteristics in general
    • H05K2201/0314—Elastomeric connector or conductor, e.g. rubber with metallic filler
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
    • H05K3/06—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process

Definitions

  • the invention relates to a switching device in which a pressure body produces an electrical connection on a printed circuit board when actuated.
  • a known switching device (EP 0 600 943 B1) has a pressure body which is designed to be electrically conductive at least on one end face. For switching, the pressure body is pressed onto electrical connection surfaces of a printed circuit board. In this case, an electrical connection between the connection surfaces is established by the pressure body.
  • the pressure body is designed to be soft and elastic so that the connection surfaces on the printed circuit board are not damaged or worn. With such a switching device, the connection surfaces can still be worn, as a result of which the switching behavior is deteriorated.
  • the invention is based on the problem of creating a switching device which is worn as little as possible in the long run.
  • Claim 1 solved.
  • pads made of an elastic material are applied to a circuit board.
  • a pushbutton which creates an electrical connection between the connection surfaces when it is pressed down, can be made both of a hard, metallic see material as well as be made from an elastic material.
  • the switching device is more resistant to abrasion when switching.
  • the switching behavior improves, since position tolerances of the pressure element are also better compensated for.
  • the push button of the switching device is made of a hard material, the push button can be more easily attached to a housing or can be more easily inserted into the housing during the manufacturing process.
  • the pushbutton can have an electrically conductive metal layer on the end face for easy manufacture.
  • the pushbutton can also be made entirely of a material that is only slightly elastic, such as metal.
  • the connection areas on the printed circuit board can easily be applied to the printed circuit board using the screen printing process.
  • Figure 1 shows a section through a switching device according to the invention
  • FIG. 2 shows a section through a further exemplary embodiment of a switching device.
  • a switching device according to the invention has a printed circuit board 1 (FIG. 1) on which at least two conductor tracks are applied as electrically conductive connection surfaces 2.
  • the connection pads 2 are connected to an electronic circuit arranged on the circuit board 1 and not shown in the figures.
  • connection surfaces 2 are electrically connected to one another, this corresponds to a closed switch. If the electrical connection is interrupted again, this corresponds to an open switch.
  • the push button 3 is arranged in a housing 5 which encloses the circuit board 1.
  • the circuit board 1 is fastened to the housing 5 via a holder 6.
  • the housing 5 is designed to be soft and elastic, at least in the area of the push button 3.
  • the rest of the housing 5 can be made rigid or made of metal.
  • the pushbutton 3 is made of an electrically insulating material into which electrically conductive metal particles 7 are introduced. This makes the push button 3 electrically conductive. In addition, the push button 3 is stiffened by the metal particles 7, which ensures a safe switching function.
  • the pads 2 on the circuit board 1 are not worn by the constant depression of the push button 3, the pads 2 are made of a soft elastic material with rubber-elastic, resilient properties.
  • connection pads 2 can be applied to the printed circuit board 1, for example, by screen printing. Likewise, the remaining conductor tracks of the circuit board 1 can be applied in one operation together with the connection areas 2 using the screen printing method.
  • FIG. 2 shows a further exemplary embodiment of the switching device, elements of the same construction or function having the same reference symbols as in FIG. 1.
  • the push button 3 has only a thin, electrically conductive metal layer 8 (FIG. 2) which is fastened to the push button 3 and thus forms the end face 4 of the push button 3.
  • the entire push button 3 can be made entirely of metal as a metal layer 8.
  • the pushbutton 3 is electrically conductive on its end face 4. A switching function is thus reliably carried out as soon as the end face 4 rests on the connection faces 2.
  • connection surfaces 2 Due to the resilient, soft-elastic connection surfaces 2, wear of the connection surfaces 2 is reduced, since these are deformed by pressing the pushbutton 3, but return to their original shape after the pressure on the connection surfaces 2 has given in. This is ensured by the soft, elastic and resilient material of the connection surfaces 2.
  • the push button 3 and the housing 5 can, for example, be made of silicone, polycarbonate or polybutylene terephthalate, which, depending on the requirements, are made of glass fibers can be mechanically reinforced.
  • Polymers can be used as material for the connection surfaces 2
  • Polymers or rubber are used, which are made electrically conductive by introduced silver particles. Polymers can be applied to the printed circuit board 1 in the form of a soft, elastic conductive paste by printing processes, such as screen printing, or by dispensing with needle nozzles. The thickness of the pads 2 is in the range less than 1 mm (usually about 100 microns).
  • this switching device is particularly suitable for use as a push-button switch in portable remote controls, such as are used, for example, for remote-controlled locking systems of a motor vehicle.
  • the switching device can also be used for so-called smart cards (credit card-sized chip cards with pushbuttons).
  • a switching signal is triggered, which is evaluated by the circuit on circuit board 1. If the pushbutton 3 is provided as a locking and / or unlocking button, then after actuation of the pushbutton 3, a code signal is sent, by means of which the locking or unlocking of the vehicle doors is controlled after receipt in the motor vehicle. With the push button 3, comfort functions such as closing or opening the windows, adjusting the seats, switching on the heating, etc. can also be controlled remotely.
  • the switching device according to the invention can also be used for other purposes, wherever switching devices with small dimensions and low wear are required.
  • the switching device has the advantage that it is simple in construction and simple to manufacture.
  • the housing 5 can be produced together with the push button 3 in one operation by a molding process, such as injection molding.
  • the housing 5 in the area of the pushbutton 3 is advantageously made soft-elastic and otherwise hard-elastic.
  • the housing 5 is sealed against external influences such as dust or liquids. If the housing 5 is electrically conductive (through conductive particles or through a metal housing), it is also immune to interference from electromagnetic radiation.
  • the pushbutton 3 can be inserted into the injection molding tool during injection molding and thus integrated into the housing 5.
  • the housing 5 can also be used as a so-called "three-dimensional circuit board". Such printed circuit boards are also known to experts under the name "MID printed circuit boards” (Molded Interconnected Device).
  • MID printed circuit boards manufactured Interconnected Device

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Push-Button Switches (AREA)

Abstract

La présente invention concerne un dispositif de commande électrique présentant une touche (3) dont la face frontale (4) est électroconductible. Lorsqu'on appuie sur la touche (3), une connexion électrique s'établit sur la plaquette à circuit imprimé (1) par placage de la face frontale (4) contre deux circuits conducteurs (2). Pour éviter une trop grande usure de ces circuits (2), on les fabrique dans un matériau souple. (Fig. 1)
PCT/DE1998/000038 1997-01-13 1998-01-07 Dispositif de commande electrique WO1998031027A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19700846.1 1997-01-13
DE1997100846 DE19700846C1 (de) 1997-01-13 1997-01-13 Elektrische Schaltvorrichtung

Publications (1)

Publication Number Publication Date
WO1998031027A1 true WO1998031027A1 (fr) 1998-07-16

Family

ID=7817243

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/000038 WO1998031027A1 (fr) 1997-01-13 1998-01-07 Dispositif de commande electrique

Country Status (2)

Country Link
DE (1) DE19700846C1 (fr)
WO (1) WO1998031027A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6801140B2 (en) * 2001-01-02 2004-10-05 Nokia Corporation System and method for smart clothing and wearable electronic devices
CN100339921C (zh) * 2004-02-23 2007-09-26 华硕电脑股份有限公司 具有无穿透的缝隙按键部的壳体
CN103748790A (zh) * 2011-07-01 2014-04-23 伊莱克斯家用产品公司 制造电气开关元件的方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19904979A1 (de) * 1999-02-06 2000-08-10 Valeo Schalter & Sensoren Gmbh Leiterplatte für einen elektrischen Schalter
DE102004031403A1 (de) * 2004-06-29 2006-02-02 Siemens Ag Schaltungsmodul und Verfahren zu dessen Herstellung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699294A (en) * 1971-05-18 1972-10-17 Flex Key Corp Keyboard, digital coding, switch for digital logic, and low power detector switches
US3735068A (en) * 1970-09-26 1973-05-22 Alps Electric Co Ltd Push-button switch with resilient conductive contact member and with helical conductive networks
FR2189848A1 (fr) * 1972-06-22 1974-01-25 Philips Nv
US4315238A (en) * 1979-09-24 1982-02-09 Eventoff Franklin Neal Bounceless switch apparatus
US4492949A (en) * 1983-03-18 1985-01-08 Barry Wright Corporation Tactile sensors for robotic gripper and the like

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128778A1 (de) * 1991-08-29 1993-03-04 Siemens Ag Gehaeuseteil fuer eine vor schadstoffen zu schuetzende elektrische schaltungsanordnung z. b. eines kfz-schliesssystemes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735068A (en) * 1970-09-26 1973-05-22 Alps Electric Co Ltd Push-button switch with resilient conductive contact member and with helical conductive networks
US3699294A (en) * 1971-05-18 1972-10-17 Flex Key Corp Keyboard, digital coding, switch for digital logic, and low power detector switches
FR2189848A1 (fr) * 1972-06-22 1974-01-25 Philips Nv
US4315238A (en) * 1979-09-24 1982-02-09 Eventoff Franklin Neal Bounceless switch apparatus
US4492949A (en) * 1983-03-18 1985-01-08 Barry Wright Corporation Tactile sensors for robotic gripper and the like

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6801140B2 (en) * 2001-01-02 2004-10-05 Nokia Corporation System and method for smart clothing and wearable electronic devices
CN100339921C (zh) * 2004-02-23 2007-09-26 华硕电脑股份有限公司 具有无穿透的缝隙按键部的壳体
CN103748790A (zh) * 2011-07-01 2014-04-23 伊莱克斯家用产品公司 制造电气开关元件的方法

Also Published As

Publication number Publication date
DE19700846C1 (de) 1998-04-23

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