EP1301936A1 - Dispositif de commutation destine a un appareil electrique - Google Patents

Dispositif de commutation destine a un appareil electrique

Info

Publication number
EP1301936A1
EP1301936A1 EP01960322A EP01960322A EP1301936A1 EP 1301936 A1 EP1301936 A1 EP 1301936A1 EP 01960322 A EP01960322 A EP 01960322A EP 01960322 A EP01960322 A EP 01960322A EP 1301936 A1 EP1301936 A1 EP 1301936A1
Authority
EP
European Patent Office
Prior art keywords
electrically conductive
switching device
button
conductive layer
switching
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
EP01960322A
Other languages
German (de)
English (en)
Other versions
EP1301936B1 (fr
Inventor
Joachim Spratte
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.)
Continental Automotive GmbH
Original Assignee
Siemens 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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1301936A1 publication Critical patent/EP1301936A1/fr
Application granted granted Critical
Publication of EP1301936B1 publication Critical patent/EP1301936B1/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
    • H01H13/70—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
    • H01H13/702—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 with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/07—Actuators transparent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/008—Static electricity considerations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/01—Miscellaneous combined with other elements on the same substrate

Definitions

  • the invention relates to a switching device for an electrical device with a longitudinally displaceable push button provided for depressing, with an elastic switching mat delimiting an area with electrical contacts kept at a distance from one another and with a protective element against electrostatic discharge, the switching element being used for connection to a mass part of the electrical device is provided.
  • the protective element is designed as a sheet arranged in front of the safety mat.
  • the sheet has a recess in the area of the button.
  • voltages of up to 25 kV can arise, which are derived from the sheet into the mass of the electrical device. This prevents damage to electronic components of the electrical device.
  • a disadvantage of the known switching device is that the sheet metal is a very cost-intensive component to be manufactured and assembled.
  • the invention is based on the problem of designing a switching device of the type mentioned at the outset in such a way that it can be produced particularly cost-effectively.
  • This problem is solved according to the invention in that the protective element has an electrically conductive layer arranged on the side of the switch mat facing the button.
  • the protective element By installing the protective element on the safety mat, protection against electrostatic discharge is automatically generated when the safety mat is installed. This eliminates the separate assembly of the protective element. Furthermore, the layer can be applied in a particularly cost-effective manner in comparison to the sheet metal part in the manufacture of the switch mat. As a result, the switching device according to the invention is particularly cost-effective. Another advantage of the invention is that the protective element requires a particularly small amount of space.
  • the electrically conductive layer has conductive lacquer or contact ink.
  • a conductive lacquer or such contact ink is mostly used as a contact within the switch mats and contains particles with an intended electrical conductivity, such as graphite.
  • the electrically conductive layer for example, like the sheet metal of the known protective element, could have a very low electrical resistance. However, this leads to the fact that the electrical discharge is associated with a noticeable electric shock for the user of the switching device according to the invention. According to another advantageous development of the invention, an electric shock that is perceptible to the user can be avoided if the electrically conductive one Layer has a high electrical resistance compared to metal.
  • an electrostatic discharge is discharged particularly reliably if the pushbutton has an electrically conductive layer in at least one partial area.
  • FIG. 1 shows a sectional view through a switching device according to the invention
  • Fig. A sectional view through an inventive switching device having lighting.
  • FIG. 1 shows a switching device 1 with a pushbutton 2 that is longitudinally displaceable in a diaphragm.
  • the switching device 1 is a single switching device that is used side by side in a keyboard for a computer or an entertainment device. To simplify the drawing, a partial area of a wall is shown from an earthed housing 3 of the keyboard or entertainment device.
  • the switching device 1 has an aperture 4 and a circuit board 5 arranged at a distance from the aperture 4. Electrical contacts 6 and a switching mat 7 with a further electrical contact 8 are arranged on the circuit board 5.
  • the contacts 8 of the switch mat 7 and the circuit board 5 face each other.
  • the switch mat 7 is made of a rubber-elastic material. Tigt and biased in the position shown, in which the contacts 6, 8 are spaced apart. As a result, the button 2 is held in the position shown.
  • the switching mat 7 When the button 2 is depressed, the switching mat 7 is deformed and its contact 8 is moved against the contacts 6 of the printed circuit board 5. Furthermore, electronic components 9 are arranged on the printed circuit board 5, which monitor the bridging of the contacts 6, 8 and generate an electronic signal. The electronic components 9 are also arranged below the switch mat 7.
  • the switch mat 7 On its side facing the button 2, the switch mat 7 has a protective element 10 with an electrically conductive layer 11.
  • the electrically conductive layer 11 is in the form of a conductive lacquer or a contact ink, such as is used for the electrical contact 8 arranged on the switch mat 7, educated. Furthermore, the electrically conductive layer 11 is connected to the housing 3 via a metal spring 12. An electrostatic discharge generated when the button 2 is touched reaches the electrically conductive layer 11 and is dissipated from there into the housing 3.
  • FIG. 2 shows a switching device 13 in which a button 14 and a switching mat 15 have a recess 16.
  • a light source 17 designed as an LED is arranged in the region of the recess 16.
  • the button 14 can thereby be illuminated.
  • the switch mat 15 has an electrically conductive layer 18.
  • a portion of the button 14 also has an electrically conductive layer 19.
  • the electrically conductive layers together form a protective element 20 for dissipating an electrostatic charge. Electrostatic discharge is carried out as with the switching device device 1 derived from Figure 1. Otherwise, the switching device 13 is essentially designed like that from FIG. 1.
  • the button is made of an electrically conductive material or is coated with an electrically conductive material. A direct electrical connection of this conductive material to the switch mat is not necessary if the gap existing between the switch mat and the conductive material is made sufficiently small.

Landscapes

  • Push-Button Switches (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Selective Calling Equipment (AREA)
  • Control Of Electric Motors In General (AREA)
  • Elimination Of Static Electricity (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
EP01960322A 2000-07-18 2001-06-16 Dispositif de commutation destine a un appareil electrique Expired - Lifetime EP1301936B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10034771A DE10034771A1 (de) 2000-07-18 2000-07-18 Schalteinrichtung für ein elektrisches Gerät
DE10034771 2000-07-18
PCT/EP2001/006828 WO2002007177A1 (fr) 2000-07-18 2001-06-16 Dispositif de commutation destine a un appareil electrique

Publications (2)

Publication Number Publication Date
EP1301936A1 true EP1301936A1 (fr) 2003-04-16
EP1301936B1 EP1301936B1 (fr) 2007-12-26

Family

ID=7649236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01960322A Expired - Lifetime EP1301936B1 (fr) 2000-07-18 2001-06-16 Dispositif de commutation destine a un appareil electrique

Country Status (8)

Country Link
US (1) US6580043B1 (fr)
EP (1) EP1301936B1 (fr)
JP (1) JP2004504695A (fr)
CN (1) CN1443359A (fr)
AT (1) ATE382186T1 (fr)
AU (1) AU2001281845A1 (fr)
DE (2) DE10034771A1 (fr)
WO (1) WO2002007177A1 (fr)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4295468B2 (ja) * 2001-12-21 2009-07-15 ポリマテック株式会社 照光式押釦スイッチ用カバー部材
US7009121B2 (en) * 2002-04-25 2006-03-07 Preh-Werke Gmbh & Co. Kg Keyboard, especially for electronic payment terminals, and keypad
US6917000B2 (en) * 2003-01-17 2005-07-12 Lite-On Technology Corporation Signal input device
JP3871136B2 (ja) * 2003-10-03 2007-01-24 船井電機株式会社 スイッチ装置
US7161106B2 (en) * 2003-11-06 2007-01-09 Nike, Inc. Switching device for flexible material
JP4438429B2 (ja) * 2004-01-30 2010-03-24 ブラザー工業株式会社 スイッチ
KR101054406B1 (ko) * 2004-03-05 2011-08-05 엘지전자 주식회사 조작 버튼
KR100619852B1 (ko) * 2004-04-30 2006-09-08 엘지전자 주식회사 이동통신 단말기 본체
JP2005353412A (ja) * 2004-06-10 2005-12-22 Alps Electric Co Ltd 板バネ付シート、及びこの板バネ付シートを使用したスイッチ装置
KR100652665B1 (ko) * 2004-08-31 2006-12-06 엘지전자 주식회사 이동 통신 단말기의 정전기 방지용 배터리 잠금 장치
JP4302024B2 (ja) * 2004-09-17 2009-07-22 株式会社ソニー・コンピュータエンタテインメント ボタン構造、携帯型電子装置
TW200635443A (en) * 2005-03-30 2006-10-01 Asustek Comp Inc An electric device with electrostatic discharging structure
JP4720454B2 (ja) * 2005-11-15 2011-07-13 ブラザー工業株式会社 電子機器
JP4695036B2 (ja) * 2006-07-26 2011-06-08 セイコーインスツル株式会社 スイッチ構造および電子機器
JP2008270023A (ja) * 2007-04-23 2008-11-06 Tokai Rika Co Ltd タッチセンサを備えたスイッチ
US7498537B1 (en) * 2007-08-24 2009-03-03 Freudenberg-Nok General Partnership Integrated conductive radio button
JP2009163881A (ja) * 2007-12-27 2009-07-23 Toshiba Corp 電子機器
US20090174992A1 (en) * 2008-01-09 2009-07-09 Eric Simon System and Method for Supporting Electrical Connectivity Between Information Handling System Chassis Components
JP5197420B2 (ja) * 2009-02-17 2013-05-15 キヤノン株式会社 電子機器
CN103151203A (zh) * 2011-12-07 2013-06-12 深圳富泰宏精密工业有限公司 按键组件
TWI524367B (zh) * 2012-04-12 2016-03-01 吳長隆 鍵盤之按鍵結構及其製造方法
CN109411278A (zh) * 2017-08-16 2019-03-01 致伸科技股份有限公司 防静电放电的按键结构
KR102403356B1 (ko) * 2017-11-01 2022-06-02 현대자동차주식회사 차량용 컨트롤 패널
CN116190142A (zh) * 2021-11-26 2023-05-30 致伸科技股份有限公司 具有防静电功能的键盘装置

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JPS5686723U (fr) * 1979-12-07 1981-07-11
GB2102626B (en) * 1981-07-21 1985-06-05 Standard Telephones Cables Ltd Contact dimple pad
GB8423358D0 (en) * 1984-09-15 1984-11-07 Motorola Israel Ltd Flat membrane key and keyboard
DE3733002A1 (de) * 1986-09-30 1988-04-07 Wilde Membran Impuls Tech Additiv metallisierte elektrisch leitfaehige struktur
US4812831A (en) * 1987-02-10 1989-03-14 Amp Incorporated Key switch with controllable illumination
DE4442073C2 (de) * 1994-11-25 2001-10-18 Cherry Mikroschalter Gmbh Tastatur mit Metallplatte
DE29501466U1 (de) * 1995-01-31 1995-03-30 Celfa Ag, Seewen Transparente Folie, insbesondere zur Herstellung von Frontfolien für Folientastaturen o.dgl.
JPH08273473A (ja) * 1995-03-29 1996-10-18 Shin Etsu Polymer Co Ltd 照光式押釦スイッチ装置
US5975711A (en) * 1995-06-27 1999-11-02 Lumitex, Inc. Integrated display panel assemblies
US5661279A (en) * 1995-10-26 1997-08-26 Sunarrow Co., Ltd. Pushbutton switch
JP3988203B2 (ja) * 1996-10-22 2007-10-10 松下電器産業株式会社 パネルスイッチ用可動接点体
US6044152A (en) * 1998-01-15 2000-03-28 Ericsson Inc. Shielded keyboard for a portable communication device
JPH11232963A (ja) * 1998-02-13 1999-08-27 Matsushita Electric Ind Co Ltd パネルスイッチ用可動接点体およびそれを用いたパネルスイッチ
JP4038265B2 (ja) * 1998-02-17 2008-01-23 セイコープレシジョン株式会社 Ｅｌ付きシートスイッチ
US6310308B1 (en) * 2000-09-20 2001-10-30 Spectra Lux Corporation Compact push-button switch assembly

Non-Patent Citations (1)

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Title
See references of WO0207177A1 *

Also Published As

Publication number Publication date
JP2004504695A (ja) 2004-02-12
US6580043B1 (en) 2003-06-17
WO2002007177A1 (fr) 2002-01-24
DE50113419D1 (de) 2008-02-07
ATE382186T1 (de) 2008-01-15
EP1301936B1 (fr) 2007-12-26
DE10034771A1 (de) 2002-01-31
AU2001281845A1 (en) 2002-01-30
CN1443359A (zh) 2003-09-17

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