EP0100936A2 - Interrupteur à bouton poussoir - Google Patents
Interrupteur à bouton poussoir Download PDFInfo
- Publication number
- EP0100936A2 EP0100936A2 EP83107108A EP83107108A EP0100936A2 EP 0100936 A2 EP0100936 A2 EP 0100936A2 EP 83107108 A EP83107108 A EP 83107108A EP 83107108 A EP83107108 A EP 83107108A EP 0100936 A2 EP0100936 A2 EP 0100936A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- key
- key switch
- differential path
- path part
- tappet
- 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
Links
Images
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
-
- 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
- H01H13/12—Movable parts; Contacts mounted thereon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
- H01H15/02—Details
- H01H15/06—Movable parts; Contacts mounted thereon
- H01H15/10—Operating parts
- H01H15/102—Operating parts comprising cam devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H2001/0005—Redundant contact pairs in one switch for safety reasons
Definitions
- the invention relates to a key switch with at least one contact piece fixed in a base and a U-shaped contactor, the contact-side end of which can be resiliently pivoted from one switching position into another switching position by means of at least one key cam of a key tappet supported on a return spring.
- Such key switches are well known in a versatile design and in use. For modern input keyboards of electronic systems and in particular for typing keyboards of computer-controlled typing systems, key switches in such a flat design are required that the keyboard has a maximum height of about 30 mm in the third row of keys according to a currently required standard. Key switches, which are suitable for the construction of such a keyboard, should on the one hand be extremely stable with a very long service life and fully automatic mountability and on the other hand have a tactile pressure point immediately before the contact is closed in the interest of a safe switching function. It is necessary that with a usual key stroke of about 4 mm a difference between the switching point and the switch-back point, ie a hysteresis behavior is guaranteed and that the switch can be mass-produced very inexpensively.
- the key tappet is divided into a tappet part and a differential path part, that the differential path part is pushed onto catches arranged on the tappet part and can be freely moved between an upper and lower end position, that the differential path part is displaced by a mechanical at the initial displacement of the tappet part Movement inhibition initially maintains its rest position until the differential path part assumes the upper end position relative to the plunger part and that the plunger part moves together with the differential path part after the initial displacement, the at least one button cam located on the differential path part actuating the contactor.
- the differential path part is held in the rest position by the catches on the tappet part in the uppermost position. If the plunger section is pressed down when the button switch is pressed, it can initially move freely within the differential travel section until it stops on the top of the differential travel section and takes the differential travel section down with it. Since the at least one key cam rests under pressure on the contactor and the differential path part experiences mechanical movement inhibition, the differential path part remains in its uppermost position until the plunger part takes it downward due to a mechanical stop. Only by moving the differential path part can the contactor move along the switch slope of the key cam to actuate the switch. When the button is released, the tappet part is returned by a spiral compression spring, with its catches reaching under the differential travel part and returning it to the rest position with upward.
- An advantageous embodiment of the invention provides that the catches on the tappet part are designed as hook-shaped tabs, each with a projecting stop shoulder, and that the tabs run in a guide groove in the differential travel part, the stop shoulders engaging under a stop edge on the differential travel part.
- the provision of guide grooves for the hook-shaped tabs ensures that the differential path part can only move in the actuation direction of the key, so that transverse moments or eccentric moments cannot trigger premature entrainment of the differential path part, which would impair the desired switching function.
- the differential path part is provided with a central bore through which a guide pin engaging in a guide sleeve in the base and two hook-shaped tabs lying on both sides of the guide pin extend, the respective stop shoulder of which engages under the edge of the differential path part in the region of the guide grooves.
- the mechanical movement inhibition for the differential path part is brought about by the button cams which are in pre-tension on the contactor in the rest position. This force with which the contact spring rests on the key cam thus requires an increased actuating force shortly before the switching point, which creates a pressure point feeling.
- the differential path part is provided with at least one plastic spring, which rests on the inside of the cover of the key switch.
- a further embodiment also provides that a spiral compression spring that biases the key switch into the rest position engages over the guide sleeve in the base and between the hook-shaped tabs over the guide pin on the plunger part. This ensures that the return force of the spiral compression spring can only act on the differential travel part via the tappet part.
- the invention provides that a cutout is attached to the underside of the key cam, which engages in a corresponding recess on the contact piece when the key tappet is pressed is.
- the base is provided on opposite sides with two lateral guide ribs, between which a projection encompassing the plastic spring engages.
- These lateral guide ribs can be designed to extend into the cover over the upper edge of the base, which also simplifies the assembly of the switch and, in particular, automatic assembly.
- the tappet part is provided with a cover plate which is guided in a corresponding cutout in the cover. Since this cover plate lies on the surface of the differential path part over a large area when the key switch is actuated, it is ensured that the differential path part cannot tilt when it is moved downward.
- the key switch shown in FIG. 1 consists of a base 10, which is closed with a cover 11. Inside the key switch, a key plunger is slidably mounted, which consists of a plunger part 12 and a differential path part 13. The ram part 12, as will be explained in more detail below, snapped into the differential travel part 13. On the underside of the plunger part 12, a guide pin 14 is attached, which engages in a guide sleeve 15, which is formed in the central region of the base 10 upwards.
- This guide sleeve 15 also serves as a holding pin for a spiral compression spring 16, which is pushed outside over the guide sleeve is and rests with its upper end on the underside of a cover plate 17 of the plunger part 12. With the help of the guide sleeve 15, on the one hand, the tappet part 12 is guided during the actuation of the button, the spiral compression spring being secured against lateral displacement at the same time.
- the contactor 20 consists of a U-shaped bent contact spring material and carries at the end of one leg a solder tab 22 which is inserted through a corresponding opening in the base of the base 11.
- the leg ⁇ carrying the soldering lug runs parallel to the inner wall of the base 10.
- the free contact end 23 of the other leg of the U-shaped bent contact 20 lies in the interior of the base 10, opposite the contact piece 21, which is also inserted into the base and of which a solder tab 24 protrudes downward from the base.
- the contactor 20 is biased such that the crossbar contacts 25 attached to the contact piece and at the contact end rest on one another when the contactor is not lifted by the action of the key tappet.
- the contactor can be partially separated by a slot 26, wherein the slot at the contact-side end can be continuous, as indicated by dashed lines, in order to obtain a double contact.
- crossbar contacts are attached to both free contact ends, which work together with corresponding elements on the contact piece.
- the U-shaped contactor protrudes with its base into a corresponding recess 27 in the lid 11.
- the U-shaped contact 20, which is open at the bottom, can thus be in a certain range with respect to the length of the legs without having to change the position of the contact plane can be varied, it being possible to achieve a relatively large spring length with reduced spring stiffness if the contactors project fully into the recess 27.
- the contactor is folded twice at the contact-side end, whereby a sliding edge is obtained which slides along the tactile cam 30 of the differential path part 13.
- the sliding edge merges on both sides of the contact end into a sliding vane 31, which is the actual part of the contactor which bears against the probe cam and runs along it.
- the differential path part 13 consists of a frame with a central bore 35 which is expanded in the direction of the two narrow sides of the frame by a guide groove 36.
- the key cams 30 are mounted at a distance on the two long sides of the differential path part 13. which corresponds to the abstano of the sliding flags 31 on the contactor 20.
- the key cams rest with a vertically extending section 37 on the sliding edge of the sliding vane 31, the crossbar contacts being lifted off.
- the two-part button plunger is depressed, the sliding edge of the associated sliding vane moves first along the vertical section 37 and then along an inwardly extending bevel 38, as a result of which the contact rail contacts 25 can come into contact with one another.
- the pressure force with which the contactor 20 bears against the section 37 causes a pressure point feeling due to the increased actuation force during the initial displacement of the differential path part 13.
- the contact piece is inserted into the base 10 in such a way that it is held on one side in the landing of the base. So that the contact end of the contactor 20 can be attached as deeply as possible, on the one hand the contact piece 21 is provided with a recess 40 and on the other hand the associated key cam 30 is provided with a cutout 41.
- hook-shaped tabs 45 On the tappet part 12 of the key tappet hook-shaped tabs 45 are attached which extend downward from the cover plate 17 and which are provided at the lower end with an outwardly projecting stop shoulder 46. These hook-shaped tabs are located on both sides of the guide pin 14, specifically outside the spiral compression spring 16 which grips over the guide pin. The size and position of these hook-shaped tabs 45 correspond to the guide grooves 36 in the differential path part 13, the stop shoulders engaging under a stop edge on the differential path part when the Ram part is inserted in the differential path part.
- the hook-shaped tabs 45 are sufficiently elastic. so that they can be compressed when inserting the plunger part 12 into the differential path part 13 until they stop under the Grip formed as a stop edge of the differential path part. In the locked state, the differential path part 13 is easily displaceable on the hook-shaped tabs 45 between an upper and a lower end position.
- the assignment of the tappet part 12 and the differential travel part 13 in a closed key switch is shown in FIG. 2.
- the plunger part 12 is shifted into its upper end position by means of the spiral compression spring 16 and rests with the stop shoulders 46 of the hook-shaped tab 45 on a stop edge located on the underside of the differential travel part.
- the differential path part 13 is also, as is apparent from FIG. 1, provided on its opposite narrow end faces with a guide projection 47.
- a plastic spring 48 is formed, which, as can be seen in FIG. 2, slidably rests on the inner surface of the base 10. With the help of this plastic spring 48, a mechanical movement inhibition for the differential path part can be created, which acts in addition to the key cams which are in pre-tensioned condition at the contactor.
- the key switch according to the construction according to FIG. 1 offers the possibility of providing two mutually independent contact sets, as is shown in FIG. 1 by the contact set which is used and which is exploded out.
- the functionality of the key switch is not affected in any way. if this is only provided with a single key set. Since by guiding the guide projection 47 between lateral ribs 50 in the base 10 of the differential part is additionally protected against twisting and tilting. By extending the guide ribs 50 beyond the upper edge of the base 10, the assembly is considerably simplified, in particular in the case of an automatic assembly, since no additional positioning aids are required for inserting the tappet part snapped into the differential path part.
- FIGS. 3A to 3C taking into account the details from FIG. 1.
- the rest position and the switching position can also be seen in FIGS. 4A and 4B.
- the key switch In the idle state, the key switch is biased by the spiral compression spring 1.6 in its uppermost position indicated in FIGS. 3A and 4A.
- the stop shoulder 46 lies against the stop edge at the lower edge of the differential travel part 13 and moves the differential travel part up to the stop on the cover 11. In this position, the sliding edges of the contactor 20 rest on the vertically extending sections 37 of the key cams 30. The contacts are tensioned and the crossbar contacts are opened.
- the button plunger 12 initially moves downward against the force of the spiral compression spring 16, but the differential portion 13 is still held in its rest position by the mechanical movement inhibition due to the sections 37 abutting the contactor, as can be seen from FIG. 3B .
- the mechanical movement inhibition is supported by the plastic springs 48, if such are provided on the differential path part.
- the tappet part 12 comes to the surface of the difference part of the way to the stop and moves it against the movement inhibition downwards, the sliding edge on the contactor sliding over the bevels 38 upwards and releasing the contact. Due to the mechanical movement inhibition, the entrainment of the differential travel part 13 can be determined as an increase in the key press, which achieves the function of a pressure point.
- the key tappet 12 moves upward due to the pressure of the spiral compression spring 16 and comes to rest with the stop shoulder 46 on the stop edge on the underside of the differential travel part 13 and takes the differential travel part 13 upwards into the position shown in FIG. 3A .
- the difference path is essentially determined by the distance of the stop shoulder 46 from the stop edge on the underside of the difference path part.
- FIG. 1 A force-displacement diagram is shown in FIG.
- the compression spring 16 When the tappet part 12 is pressed, the compression spring 16 is tensioned, the actuating force initially increasing linearly. From the moment the differential travel part 13 is taken along, the actuating force rises steeply until the frictional force between the contactor 20 and the sensing cam 30 is overcome. While the sliding flag 31 slides along section 37, the actuating force continues to increase linearly. until the slide flag merges into the bevel 38. This results in a drop in the actuating force up to the switching point, ie the lifting of the contact rail contacts 25. The rest of the switching stroke runs with an actuating force which is further linearly dependent on the compression spring 16. When the button switch is released, the actuation force decreases linearly up to the switch-back point.
- This switch-back point is offset from the switching point by the differential travel, which results from the interaction of the plunger part with the differential travel section. This creates a switching hysteresis.
- the running of the sliding vane 31 on the switch slope 38 results in a rapid reduction in the actuating force, as is shown by the negative increase in the curve associated with the downshift path in FIG. 5.
- a small height projection (not shown in the drawing) is attached to the transition from the section 37 into the bevel 38, the perceptibility of the pressure point can be increased.
- This elevation can be carried out in such a way that the vertically extending section 37 is changed into a section which rises slightly obliquely towards the front, the highest height being in the transition of this section into the switching slope.
Landscapes
- Push-Button Switches (AREA)
- Switches With Compound Operations (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT83107108T ATE48494T1 (de) | 1982-08-06 | 1983-07-20 | Tastenschalter. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823229465 DE3229465A1 (de) | 1982-08-06 | 1982-08-06 | Tastenschalter |
DE3229465 | 1982-08-06 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0100936A2 true EP0100936A2 (fr) | 1984-02-22 |
EP0100936A3 EP0100936A3 (en) | 1987-01-07 |
EP0100936B1 EP0100936B1 (fr) | 1989-12-06 |
Family
ID=6170335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83107108A Expired EP0100936B1 (fr) | 1982-08-06 | 1983-07-20 | Interrupteur à bouton poussoir |
Country Status (6)
Country | Link |
---|---|
US (1) | US4467160A (fr) |
EP (1) | EP0100936B1 (fr) |
JP (1) | JPS59146113A (fr) |
KR (1) | KR890005313B1 (fr) |
AT (1) | ATE48494T1 (fr) |
DE (1) | DE3229465A1 (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0306147A1 (fr) * | 1987-08-31 | 1989-03-08 | SAINT SWITCH, INC. (an Illinois Corporation) | Interrupteur à cammande flotante et déclenchement ponctuel |
DE3737218A1 (de) * | 1987-11-03 | 1989-05-18 | Asea Brown Boveri | Druckfolgeschalter |
EP0499449A1 (fr) * | 1991-02-12 | 1992-08-19 | Minebea Co. Ltd. | Commutateur à bouton-poussoir |
DE4138339C1 (en) * | 1991-11-21 | 1993-01-21 | Cherry Mikroschalter Gmbh, 8572 Auerbach, De | Flat push-button switch e.g. for lap-top PC keyboard - has plunger assembly that reacts against coil spring providing actuation of contacts |
US10249454B2 (en) | 2013-03-28 | 2019-04-02 | Zf Friedrichshafen Ag | Key stem for a key module of a key for a keyboard, key module of a key for a keyboard, and method for manufacturing a key module for a key for a keyboard |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2561817B1 (fr) * | 1984-03-21 | 1988-05-27 | Dba | Contacteur electrique pour servomoteur pneumatique de freinage |
DE3608703A1 (de) * | 1986-03-15 | 1987-09-24 | Siedle & Soehne S | Schaltelement |
US4691086A (en) * | 1986-04-03 | 1987-09-01 | Indak Manufacturing Corp. | Pushbutton electrical switch having a flairing contactor loosely rotatable on a spring-biased eyelet |
DE3713775C2 (de) * | 1987-04-24 | 1996-02-08 | Cherry Mikroschalter Gmbh | Tastenschalter |
EP0309741A1 (fr) * | 1987-09-30 | 1989-04-05 | Oerlikon-Contraves AG | Interrupteur électrique à bouton-pousoir |
US4935591A (en) * | 1987-11-05 | 1990-06-19 | Alps Electric Co., Ltd. | Push button switch |
JPH073547Y2 (ja) * | 1988-07-25 | 1995-01-30 | アルプス電気株式会社 | 押釦スイツチ |
JPH02123033U (fr) * | 1989-03-22 | 1990-10-09 | ||
US4939324A (en) * | 1989-08-30 | 1990-07-03 | Key Tronic Corporation | Keyswitch for computer keyboard |
US5201824A (en) * | 1989-10-06 | 1993-04-13 | Alps Electric Co., Ltd. | Push button switch |
US5120923A (en) * | 1989-10-06 | 1992-06-09 | Takafumi Kato | Push button switch |
DE4203120C2 (de) * | 1992-02-04 | 2001-09-27 | Cherry Mikroschalter Gmbh | Flacher Tastschalter |
US5821490A (en) * | 1996-07-26 | 1998-10-13 | Yazaki Corporation | Push button switch module |
IT1304681B1 (it) * | 1998-10-08 | 2001-03-28 | Kostal Italia S R L | Interruttore di sicurezza destinato ad essere interposto in uncircuito elettrico di un veicolo. |
CN2682642Y (zh) * | 2003-11-11 | 2005-03-02 | 富士康(昆山)电脑接插件有限公司 | 电连接器 |
US7148440B2 (en) * | 2004-08-27 | 2006-12-12 | Illinois Tool Works, Inc | Stackable switch |
GB2428892B (en) * | 2005-08-04 | 2008-08-13 | Genet Ind | Ring Network Switch Assembly |
JP2008177094A (ja) * | 2007-01-19 | 2008-07-31 | Yazaki Corp | スイッチ |
US7560652B2 (en) * | 2007-03-02 | 2009-07-14 | Zf Friedrichshafen Ag | Electrical contact with redundant paths |
CN101276651B (zh) * | 2007-03-30 | 2011-04-20 | 群康科技(深圳)有限公司 | 液晶显示装置 |
CN101516167B (zh) * | 2008-02-18 | 2011-11-09 | 鸿富锦精密工业(深圳)有限公司 | 电子设备 |
CN101807755B (zh) * | 2009-02-16 | 2012-06-20 | 富士康(昆山)电脑接插件有限公司 | 电连接器组件 |
US8432678B2 (en) | 2010-01-06 | 2013-04-30 | Apple Inc. | Component assembly |
US9508499B2 (en) * | 2012-10-03 | 2016-11-29 | Honeywell International Inc. | Recreational vehicle beam switch assembly |
JP5857988B2 (ja) * | 2013-03-08 | 2016-02-10 | オムロン株式会社 | スイッチ |
DE102013110064B4 (de) | 2013-09-12 | 2018-07-05 | Gmk Electronic Design Gmbh | Aufsteckelement für ein Tastenmodul |
DE102013223843A1 (de) | 2013-11-21 | 2015-06-03 | Zf Friedrichshafen Ag | Tastenknopf, Tastenschalter, Tastenrahmen und Leiterplatte für eine Dateneingabevorrichtung, Dateneingabevorrichtung und Verfahren zur Reduzierung eines Schaltweges eines Tastenschalters einer Dateneingabevorrichtung |
DE102014208173A1 (de) | 2014-04-30 | 2015-11-05 | Zf Friedrichshafen Ag | Einrichtungen und Anordnungen zum berührungslosen Erfassen eines Tastenknopfhubes, Verfahren zum Herstellen einer solchen Einrichtung und Verfahren zum berührungslosen Erfassen eines Tastenknopfhubes |
DE102014212627A1 (de) | 2014-06-30 | 2015-12-31 | Zf Friedrichshafen Ag | Vorrichtung zum berührungslosen Erfassen eines Hubs einer Taste, Tastenmodul, Tastatur und Verfahren zum Herstellen einer Erfassungsvorrichtung und eines Tastenmoduls |
US20160071662A1 (en) * | 2014-09-05 | 2016-03-10 | Dongguan Zen-tech Electronic Technology Co., Ltd. | Keyboard switch |
US10102987B1 (en) | 2017-05-16 | 2018-10-16 | Massdrop Group, Inc. | Keyboard switch with a cam having a curved profile to promote a smooth tactile response |
US10965287B2 (en) * | 2018-12-20 | 2021-03-30 | Dexin Electronic Ltd. | Replaceable key structure |
CN111916296A (zh) * | 2020-07-31 | 2020-11-10 | 惠州市正牌科电有限公司 | 一种分体式按钮的机械轴结构及光轴结构 |
CN111916297A (zh) * | 2020-07-31 | 2020-11-10 | 惠州市正牌科电有限公司 | 一种分体式底座的机械轴结构及光轴结构 |
WO2023122518A1 (fr) * | 2021-12-23 | 2023-06-29 | Voyetra Turtle Beach, Inc. | Structure de touche améliorée pour clavier |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US3163740A (en) * | 1962-03-19 | 1964-12-29 | Patent License Corp | Push-button switch assembly |
EP0028000A1 (fr) * | 1979-10-30 | 1981-05-06 | Siemens Aktiengesellschaft | Interrupteur à bouton-poussoir |
US4361743A (en) * | 1981-03-06 | 1982-11-30 | Stackpole Components Company | Lost motion keyswitch |
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US3255333A (en) * | 1964-03-06 | 1966-06-07 | S H Couch Company Inc | Push button switch construction |
GB1139756A (en) * | 1965-04-28 | 1969-01-15 | Ericsson Telefon Ab L M | Electric contact mechanism |
CH481473A (de) * | 1969-02-27 | 1969-11-15 | Schurter Ag H | Subminiatur-Drucknopftaster |
US3715545A (en) * | 1971-06-18 | 1973-02-06 | Cherry Electrical Prod | Momentary push button switch with improved non-conductive cam for normally retaining movable leaf spring contacts in a non-operative position |
US3735058A (en) * | 1971-09-15 | 1973-05-22 | Addmaster Corp | Keyboard printed circuit switch assembly with axially movable coil spring contact and associated key type actuator |
US3773997A (en) * | 1971-12-13 | 1973-11-20 | Datanetics Corp | Key assembly diaphragm switch actuator with overtravel and feel mechanisms |
US3777090A (en) * | 1972-07-26 | 1973-12-04 | Datanetics Corp | Linear cam actuated diaphragm switch with lost motion actuator |
US3993884A (en) * | 1972-09-15 | 1976-11-23 | Victor Comptometer Corporation | Detachably mounted keyboard pushbutton actuators and housing assembly |
US3940578A (en) * | 1973-04-09 | 1976-02-24 | Alphameric Keyboards Limited | Keyboard structure having panel mounted key actuators with electrical component operating element |
JPS5018972U (fr) * | 1973-06-15 | 1975-03-03 | ||
DE7502213U (de) * | 1975-01-25 | 1976-01-29 | Triumph Werke Nuernberg Ag, 8500 Nuernberg | Tastschalter |
JPS5267975U (fr) * | 1975-11-14 | 1977-05-19 | ||
SE402654B (sv) * | 1976-12-21 | 1978-07-10 | Ericsson Telefon Ab L M | Tryckknappsomkopplare for anvendning vid pa ett kretskort anordnade stromkretsar |
DE7825679U1 (de) * | 1978-08-29 | 1978-12-07 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Tastschalter, insbesondere für Fernsprechgeräte |
-
1982
- 1982-08-06 DE DE19823229465 patent/DE3229465A1/de active Granted
-
1983
- 1983-07-12 US US06/512,927 patent/US4467160A/en not_active Expired - Lifetime
- 1983-07-20 EP EP83107108A patent/EP0100936B1/fr not_active Expired
- 1983-07-20 AT AT83107108T patent/ATE48494T1/de active
- 1983-08-03 JP JP58142376A patent/JPS59146113A/ja active Granted
- 1983-08-04 KR KR1019830003646A patent/KR890005313B1/ko not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3163740A (en) * | 1962-03-19 | 1964-12-29 | Patent License Corp | Push-button switch assembly |
EP0028000A1 (fr) * | 1979-10-30 | 1981-05-06 | Siemens Aktiengesellschaft | Interrupteur à bouton-poussoir |
US4361743A (en) * | 1981-03-06 | 1982-11-30 | Stackpole Components Company | Lost motion keyswitch |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0306147A1 (fr) * | 1987-08-31 | 1989-03-08 | SAINT SWITCH, INC. (an Illinois Corporation) | Interrupteur à cammande flotante et déclenchement ponctuel |
DE3737218A1 (de) * | 1987-11-03 | 1989-05-18 | Asea Brown Boveri | Druckfolgeschalter |
EP0499449A1 (fr) * | 1991-02-12 | 1992-08-19 | Minebea Co. Ltd. | Commutateur à bouton-poussoir |
US5203448A (en) * | 1991-02-12 | 1993-04-20 | Minebea Co., Ltd. | Push button key switch |
DE4138339C1 (en) * | 1991-11-21 | 1993-01-21 | Cherry Mikroschalter Gmbh, 8572 Auerbach, De | Flat push-button switch e.g. for lap-top PC keyboard - has plunger assembly that reacts against coil spring providing actuation of contacts |
US10249454B2 (en) | 2013-03-28 | 2019-04-02 | Zf Friedrichshafen Ag | Key stem for a key module of a key for a keyboard, key module of a key for a keyboard, and method for manufacturing a key module for a key for a keyboard |
Also Published As
Publication number | Publication date |
---|---|
JPH0447932B2 (fr) | 1992-08-05 |
EP0100936B1 (fr) | 1989-12-06 |
ATE48494T1 (de) | 1989-12-15 |
KR890005313B1 (ko) | 1989-12-20 |
US4467160A (en) | 1984-08-21 |
DE3229465A1 (de) | 1984-02-09 |
KR840005906A (ko) | 1984-11-19 |
DE3229465C2 (fr) | 1988-12-01 |
EP0100936A3 (en) | 1987-01-07 |
JPS59146113A (ja) | 1984-08-21 |
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