EP1301936B1 - Schalteinrichtung für ein elektrisches gerät - Google Patents

Schalteinrichtung für ein elektrisches gerät Download PDF

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Publication number
EP1301936B1
EP1301936B1 EP01960322A EP01960322A EP1301936B1 EP 1301936 B1 EP1301936 B1 EP 1301936B1 EP 01960322 A EP01960322 A EP 01960322A EP 01960322 A EP01960322 A EP 01960322A EP 1301936 B1 EP1301936 B1 EP 1301936B1
Authority
EP
European Patent Office
Prior art keywords
electrically conductive
switching
conductive layer
switching device
protective element
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
EP01960322A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1301936A1 (de
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 VDO Automotive 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 VDO Automotive AG filed Critical Siemens VDO Automotive AG
Publication of EP1301936A1 publication Critical patent/EP1301936A1/de
Application granted granted Critical
Publication of EP1301936B1 publication Critical patent/EP1301936B1/de
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
    • H01H13/70—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, provided for depressing button, with an elastic, a range with spaced apart held electrical contacts limiting switching mat and with a protective element against electrostatic discharge, wherein the switching element for connection to a mass part the electrical device is provided.
  • the protective element is designed as arranged in front of the switching mat sheet. In the area of the button, the sheet has a recess. With an electrostatic charging of the user, voltages of up to 25 kV can arise, which are derived from the metal sheet into the mass of the electrical device. As a result, damage to electronic components of the electrical device is prevented.
  • Such a switching device is from the document GB-A-2102626 known.
  • a disadvantage of the known switching device is that the sheet is a very expensive to manufacture and to be mounted component.
  • the invention is based on the problem of designing a switching device of the type mentioned above so that it is particularly inexpensive to manufacture.
  • the protective element has an electrically conductive layer arranged on the side of the switching mat facing the push-button.
  • the protective element By applying the protective element on the safety mat, the protection against electrostatic discharge during assembly of the safety mat is automatically generated. This eliminates the separate mounting of the protective element. Furthermore, the layer can be particularly cost-effective in the manufacture of the switching mat compared to the sheet metal part. As a result, the switching device according to the invention designed particularly cost. Another advantage of the invention is that the protective element requires a particularly small space.
  • the electrically conductive layer has conductive lacquer or contact ink.
  • a conductive lacquer or such contact ink is usually used as a contact within the switching mats and contains particles with an intended electrical conductivity, such as graphite.
  • the electrically conductive layer could, for example, as the sheet of the known protective element have a very low electrical resistance. However, this leads to the fact that the electrical discharge for the user of the switching device according to the invention is associated with a noticeable electric shock. A perceptible to the user electric shock can be avoided according to another advantageous embodiment of the invention, when the electrically conductive Layer has a high electrical resistance compared to metal.
  • An electrostatic discharge is derived according to another advantageous embodiment of the invention particularly reliable if the probe has an electrically conductive layer in at least one subregion.
  • FIG. 1 shows a switching device 1 with a longitudinally displaceably guided in a diaphragm button 2.
  • the switching device 1 is a single of many side by side in a keyboard for a computer or an entertainment device used switching devices. To simplify the drawing of a grounded housing 3 of the keyboard or entertainment device, a portion of a wall is shown.
  • the switching device 1 has a diaphragm 4 and arranged at a distance from the diaphragm 4 printed circuit board 5.
  • On the circuit board 5 electrical contacts 6 and a switching mat 7 are arranged with a further electrical contact 8.
  • the contacts 8 of the switching mat 7 and the circuit board 5 are opposite each other.
  • the switching mat 7 is made of a rubber-elastic material and in the drawn position, in which the contacts 6, 8 are spaced from each other, biased. As a result, the button 2 is held in its drawn position at the same time.
  • the switching mat 7 When the button 2 is pressed down, the switching mat 7 is deformed and its contact 8 is moved against the contacts 6 of the printed circuit board 5. Furthermore, 5 electronic components 9 are arranged on the circuit board, which monitor the bridging of the contacts 6, 8 and generate an electronic signal. The electronic components 9 are also arranged below the switching mat 7.
  • the switching mat 7 On its side facing the pushbutton 2, the switching mat 7 has a protective element 10 with an electrically conductive layer 11.
  • the electrically conductive layer 11 is used as a conductive lacquer or as a contact ink, as used, for example, for the electrical contact 8 arranged on the switching mat 7, educated. Furthermore, the electrically conductive layer 11 is connected via a metal spring 12 to the housing 3. An electrostatic discharge generated upon contact of the probe 2 reaches the electrically conductive layer 11 and is discharged from there into the housing 3.
  • FIG. 2 shows a switching device 13 in which a push-button 14 and a switching mat 15 have a recess 16. In the region of the recess 16 designed as a LED light source 17 is arranged.
  • the button 14 can be illuminated by this.
  • the switching 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.
  • An electrostatic discharge is like the switching device 1 derived from Figure 1. Otherwise, the switching device 13 is formed substantially like that of Figure 1.
  • the probe is made of an electrically conductive material or painted with an electrically conductive material. A direct electrical connection of this conductive material with the switching mat is not required if the zwichen the switching mat and the conductive material existing gap is made sufficiently small.

Landscapes

  • Push-Button Switches (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Elimination Of Static Electricity (AREA)
  • Control Of Electric Motors In General (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Selective Calling Equipment (AREA)
EP01960322A 2000-07-18 2001-06-16 Schalteinrichtung für ein elektrisches gerät Expired - Lifetime EP1301936B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10034771 2000-07-18
DE10034771A DE10034771A1 (de) 2000-07-18 2000-07-18 Schalteinrichtung für ein elektrisches Gerät
PCT/EP2001/006828 WO2002007177A1 (de) 2000-07-18 2001-06-16 Schalteinrichtung für ein elektrisches gerät

Publications (2)

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

Family

ID=7649236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01960322A Expired - Lifetime EP1301936B1 (de) 2000-07-18 2001-06-16 Schalteinrichtung für ein elektrisches gerät

Country Status (8)

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

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

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5914985Y2 (ja) * 1978-02-28 1984-05-02 シャープ株式会社 キ−入力装置
JPS5686723U (zh) * 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

Also Published As

Publication number Publication date
JP2004504695A (ja) 2004-02-12
CN1443359A (zh) 2003-09-17
ATE382186T1 (de) 2008-01-15
EP1301936A1 (de) 2003-04-16
WO2002007177A1 (de) 2002-01-24
US6580043B1 (en) 2003-06-17
AU2001281845A1 (en) 2002-01-30
DE10034771A1 (de) 2002-01-31
DE50113419D1 (de) 2008-02-07

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