EP1014405B1 - Druckschalter - Google Patents

Druckschalter Download PDF

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Publication number
EP1014405B1
EP1014405B1 EP19990125555 EP99125555A EP1014405B1 EP 1014405 B1 EP1014405 B1 EP 1014405B1 EP 19990125555 EP19990125555 EP 19990125555 EP 99125555 A EP99125555 A EP 99125555A EP 1014405 B1 EP1014405 B1 EP 1014405B1
Authority
EP
European Patent Office
Prior art keywords
unit
operation unit
protrusion
elastic
fixed contact
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
EP19990125555
Other languages
English (en)
French (fr)
Other versions
EP1014405A3 (de
EP1014405A2 (de
Inventor
Yasunori Yanai
Hisashi Watanabe
Jun Sato
Hiroshi Matsui
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of EP1014405A2 publication Critical patent/EP1014405A2/de
Publication of EP1014405A3 publication Critical patent/EP1014405A3/de
Application granted granted Critical
Publication of EP1014405B1 publication Critical patent/EP1014405B1/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
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/20—Driving mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2215/00—Tactile feedback
    • H01H2215/002—Longer travel
    • 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

Definitions

  • the present invention relates to a push switch used for various kinds of electronic apparatuses, and, more particularly, the invention relates to a small push switch having a long operation stroke.
  • a switch disclosed in Japanese Patent Application Non-Examined Publication No. H8-203380 is widely known.
  • the structure of the conventional push switch as an example is described referring to Fig. 5 which shows the cross sectional front view of the conventional switch, and to Fig. 6 which shows the exploded perspective view of the same.
  • a resinous case 310 is formed to have a shape of a box having an opening at the upper side thereof.
  • a short fixed contact unit 320 having a terminal 321 and a long contact unit 330 having a terminal 331 are disposed.
  • a contact slip 340 is formed by bending a belt shaped elastic thin metal plate to have a shape like a character of U.
  • the contact slip 340 has an upward bent portion 341 at one end thereof.
  • the other end of the contact slip 340 is formed to have two leg portions 343 and 344.
  • the two leg portions 343 and 344 are bent at the bent portions 342 as shown in Fig. 6.
  • the two leg portions 343 and 344 have respective movable contact portions 345 and 346 at the respective ends thereof.
  • a connecting portion 347 is formed for connecting the two leg portions 343 and 344.
  • the movable contact portions 345 and 346 are disposed in the case 310 in such a manner as to touch the inner side of the bottom of the case 310.
  • a resinous cover 350 is disposed on the upper side of the case 310 in such a manner as to close the upper side opening of the case 310. At one end of the cover 350 a downward protrusion is formed. A supporting portion 351, viz., the front end of the downward protrusion of the cover 350 presses downward the upward bent portion 341 of the contact slip 340, whereby the movable contact units 345 and 346 elastically contact to the inner side of the bottom of the case 310 with predetermined pressing force.
  • a resinous operation unit 360 is disposed in such a manner as to extend from the space between the two leg portions 343 and 344 of the contact slip 340 to the outside of the cover 350 through a hole 352 formed through the central portion of the cover 350. That is, the operation unit 360 is supported to be movable up and down by the hole 352, and, the upper end portion 361 thereof protrudes through the hole 352.
  • a pressing portion 362 formed on the outer side-wall of the operation unit 360 touches the upper side of the connecting portion 347 of the contact slip 340. The pressing portion 362 is pressed upward by the elastic force of the contact slip 340 and touches the lower side of the cover 350 as shown in Fig. 5.
  • one movable contact portion 345 contacts to the long fixed contact unit 330, but the other movable contact portion 346 does not contact to neither of the contact units, accordingly the terminals 321 and 331 are not electrically connected.
  • the pressing portion 362 presses the connecting portion 347 of the contact slip 340 downward, whereby the contact slip 340 rotates on the upward bent portion 341 supported by the supporting portion 351 of the cover 350, whereby the bent portion 342 bends further, also the movable contact portions 345 and 346 are elastically pressed and slide on the inner side of the bottom of the case 310, whereby the movable contact portion 346 comes to contact to the short fixed contact unit 320 in the state that the other movable contact portion 345 is in contact with the long fixed contact unit 330.
  • the terminals 321 and 331 are electrically connected through these contact units.
  • the operation unit 360 is pressed further downward until the lower end portion 363 of the operation unit 360 touches the inner side of the bottom of the case 310 as shown in Fig. 7 and stop the downward movement.
  • the connecting portion 347 presses the pressing portion 362 of the operation unit 360 upward with the elastic restoring force of the contact slip 340, whereby the push switch comes back to the state as shown in fig. 5.
  • the stroke of the push switch is constituted with a pre-stroke comprising the move of the operation unit 360 starting from the original state of Fig. 5 till the state that the terminals 321 and 331 are electrically connected by the contact between the movable contact portion 346 of the contact slip 340 and the short fixed contact unit 320, and, an over-stroke comprising the move of the operation unit 360 starting from the state of the above pre-stroke till the state that the lower end portion 363 of the operation unit 360 touches the inner side of the bottom of the case 1. Therefore, the total stroke is considerably long.
  • the contact slip 340 is formed in such a manner that an elastic thin metal plate is bent to have a shape like a character of U having thin two leg portions 343 and 344. Therefore, careful attention have to be paid in handling during transport and assembling for preventing the intertwining and the deformation of the contact slip 340. Furthermore, the assembling of the switch is difficult and inefficient because the assembling is performed in such a manner that the contact slip 340 is set in the case 310 pressing the contact slip 340 with the supporting portion 351 of the downward protrusion of the cover 350 and the pressing portion 362 of the operation unit 360.
  • JP-A-10092260 discloses a push-on switch comprising a substrate with a switch contact thereon, composed of an outer fixed contact, a central contact and a movable contact.
  • a cap-shaped push bottom is on top of a dome-shaped spring member made of elastic material. If the push bottom is pressed down, the lower end portion of the dome-shaped spring member is deflected, and a central projecting portion of the spring member pushes down a tongue member of the movable contact member such that an electrical contact is achieved.
  • the material of the cap member and the upper part of the spring member is elastic with a constant elasticity factor, thus that an increase of the pressing force does not provide for a "finger feeling" on whether the contact is already closed or not.
  • the present invention addresses the above problems in the conventional push switch, and aims to provide a push switch in which the component parts are handled without difficulty, and assembling productivity is superior, also operation stroke is long.
  • Fig. 1 is a cross sectional front view showing a push switch in an exemplary embodiment in the present invention
  • Fig. 2 shows an exploded perspective view of the push switch in the same.
  • a shallow cavity 111 is formed in the cavity 111.
  • a central fixed contact unit 120 is disposed at the central position of the cavity 111, and two outer fixed contact units 130 are disposed symmetrically about the central fixed contact unit 120 at the positions outer than the central fixed contact unit 120.
  • the contact units 120 and 130 are fixed to the substrate 110 by insert formation, and are exposed from the upper side of the switch substrate 110, also have substantially same height.
  • contact terminals 121 and 131 are disposed on outer sides of the switch substrate 110.
  • One terminal 121 is electrically connected to the central fixed contact unit 120, and the other terminal 131 is electrically connected to the outer fixed contact unit 130.
  • a movable contact unit 140 formed with an elastic thin metal plate has a shape shown in Fig. 2. That is, the movable contact unit 140 comprises an outer annular portion 141, a tongue shaped portion 142 disposed at the central position of the outer annular portion 141. The tongue shaped portion 142 bends upward at a connecting portion 143 which connects the tongue shaped portion 142 to the outer annular portion 141.
  • the outer annular portion 141 is placed on the outer fixed contact units 130.
  • the tongue shaped portion 142 is disposed in such a manner as to face toward the central fixed contact unit 120 forming a predetermined insulation gap between the tongue shaped portion 142 and the central fixed contact unit 120.
  • An elastic unit 150 formed with an elastic insulating material comprises a thin conical portion 151 which has an opening at the lower side thereof, an upward protrusion 153 which is formed on the upper side of the conical portion 151 and has predetermined dimensions, and a downward protrusion 156 which protrudes downward from the upper end of the opening of the conical portion 151 and has predetermined dimensions.
  • a round cavity 155 having predetermined dimensions is formed, and at the lower end side of the downward protrusion 156, a round cavity 157 having predetermined dimensions is formed.
  • the diameters and the depth of the cavities 155 and 157 are determined in such a manner that, when the elastic unit 150 is deformed by pressing downward the upper end side 154 of the upward protrusion 153, the thin conical portion 151 bends backward first, next the downward protrusion 156 compressibly deforms, last the upward protrusion 153 compressibly deforms.
  • the lower end portion 152 of the conical portion 151 of the elastic unit 150 is placed on the outer annular portion 141 of the movable contact unit 140, and presses downward the outer annular portion 141 onto the outer fixed contact units 130.
  • a resinous operation unit 160 is disposed on the upward protrusion 153 of the elastic unit 150.
  • the upward protrusion 153 engages with a cavity 161 formed at the lower side of the operation unit 160.
  • the flat surface of the upper end side 154 of the upward protrusion 153 touches the flat surface of the lower side of the upper portion of the operation unit 160.
  • the operation unit 160 further comprises two protrusions 162 on the two different positions of the outer side-wall thereof and a protrusion 163 which protrudes outward from the lower end of the outer side-wall thereof.
  • a resinous cover 170 On the inner side-wall of a resinous cover 170, two grooves corresponding to the two protrusions 162 of the operation unit 160 are formed, and a surrounding wall 172 having a cavity corresponding to the protrusion 163 are formed, at the respective corresponding positions.
  • the two protrusions 162 of the operation unit 160 engage with the two grooves of the cover 170, and the protrusion 163 of the operation unit 160 engages with the cavity of the surrounding wall 172 of the cover 170.
  • the cover 170 is fixed to the switch substrate 110 by caulking after inserting protrusions 112 formed on the periphery of the upper side of the switch substrate 110 into the cuttings 173 formed at the lower end periphery of the cover 170.
  • the assembling of the push switch in this exemplary embodiment having the above structure is performed in such a manner that the component parts are placed on the switch substrate 110 in the order of the movable contact unit 140 first, next the elastic unit 150, then the operation unit 160, last the cover 170 and these are fixed by the above caulking. Therefore the assembling is simple and the respective component parts have shapes which hardly deform, whereby the handling of the component parts is not difficult, and automatic assembling can be realized without difficulty.
  • Fig. 1 shows the state of switch-off.
  • the operation unit 160 moves straight downward with the guidance of a hole 171 of the cover 170 and the inner side of the surrounding wall 172, whereby the flat lower side of the upper portion of the operation unit 160 presses downward the flat upper end side 154 of the upward protrusion 153 of the elastic unit 150.
  • the thin conical portion 151 of the elastic unit 150 elastically deforms and bends backward, whereby the lower end side of the downward protrusion 156 of the elastic unit 150 presses downward the tongue shaped portion 142 of the movable contact unit 140, whereby the tongue shaped portion 142 contacts to the central fixed contact unit 120 disposed on the switch substrate 110, whereby the central contact unit 120 and the outer fixed contact units 130 (i.e., terminals 121 and 131) are electrically connected and comes to the state of switch-on as shown in Fig. 3A.
  • the above operation constitutes a pre-stroke.
  • the operation unit 160 When the operation unit 160 is further pressed, the operation unit 160 further moves downward, and the downward protrusion 156 elastically deforms as shown in Fig. 3B. Last, the upward protrusion 153 of the elastic unit 150 deforms as shown in Fig. 3C, and the operation unit 160 stops the downward movement when the protrusion 163 at the lower end periphery of the operation unit 160 touches upper side of the switch substrate 110.
  • the occurrence of slippage between the operation unit 160 and the elastic unit 150 can be prevented because the upper portion of the elastic unit 150 engages with the cavity 161 formed at the lower side of the operation unit 160. Furthermore, the touching portions of both have flat surfaces, whereby the elastic unit 150 is pushed substantially vertically downward and elastically deforms without tilt.
  • round cavities 155 and 157 are respectively formed on the upper end side 154 of the upward protrusion 153 and at the lower end side of the downward protrusion 156 of the elastic unit 150 for setting the predetermined resilient force and compressible dimension of the respective protrusions (153,156).
  • the same effect can be obtained by replacing each of the cavities 155 and 157 with a cross-shaped cutting 181 which are symmetrical about the center thereof as shown in Fig. 4A, or a round cavity having two-cutting 182 as shown in Fig. 4B, or a round cavity having four-cutting 183 as shown in Fig. 4C.
  • the same effect can be obtained by supporting the operation unit with the cover to be movable up and down without rotation by shaping the outer side-wall of the operation unit and either of the hole formed through the upper central portion of the cover or the inner side of the surrounding wall into non-round.

Landscapes

  • Push-Button Switches (AREA)

Claims (5)

  1. Druckschalter, der umfasst:
    a) einen Schalterträger (110), der eine äußere stationäre Kontakteinheit (130) und eine mittlere stationäre Kontakteinheit (120) aufweist, wobei beide Kontakteinheiten (130, 120) an dem Träger (110) befestigt sind und jeweilige Kontaktabschnitte aufweisen, die von der Oberseite des Schalterträgers (110) her freiliegen, und die des Weiteren Verbindungsanschlüsse (121, 131) aufweisen, die sich von den jeweiligen stationären Kontakteinheiten (130, 120) nach außen erstrecken;
    b) eine bewegliche Kontakteinheit (140), die mit einer elastischen dünnen Metallplatte versehen ist, wobei die bewegliche Kontakteinheit (140) einen äußeren Abschnitt (141), der auf die äußere stationäre Kontakteinheit (130) aufgesetzt ist, sowie einen zungenförmigen Abschnitt (142) aufweist, der der mittleren stationären Kontakteinheit (120) so zugewandt ist, dass ein vorgegebener Isolierspalt zwischen dem zungenförmigen Abschnitt (142) und dem mittleren stationären Kontaktabschnitt (120) ausgebildet ist;
    c) eine elastische Einheit (150), die mit einem elastischen Material ausgebildet ist, wobei die elastische Einheit (150) einen konischen Abschnitt (151) aufweist, der eine Öffnung an seiner Unterseite, einen nach oben gerichteten Vorsprung (153) und einen nach unten gerichteten Vorsprung (156) aufweist, der vom oberen Ende der Öffnung nach unten vorsteht, und die auf den äußeren Abschnitt (141) der beweglichen Kontakteinheit (141) presst, wobei der untere Endabschnitt (152) des konischen Abschnitts (151) so eingerichtet ist, dass er auf den zungenförmigen Abschnitt (142) presst, wenn er nach unten bewegt wird, so dass der zungenförmige Abschnitt (142) mit der mittleren stationären Kontakteinheit (120) in Kontakt kommt;
    d) eine Betätigungseinheit (160), die an der elastischen Einheit (150) so angeordnet ist, dass sie nach oben und nach unten bewegt werden kann, wobei die Betätigungseinheit (160) einen Vorsprung (163) am unteren Abschlussrand der Betätigungseinheit (160) aufweist, um das Abrutschen der Betätigungseinheit (160) zu verhindern;
    e) eine Abdeckung (170), die am Rand des Schalterträgers (110) befestigt ist, wobei die Abdeckung (170) die Betätigungseinheit (160) mit einer umgebenden Wand (172) derselben so hält, dass sie ohne das nach oben gerichtete Abrutschen der Betätigungseinheit (160) nach oben und nach unten bewegt werden kann, und ein Loch (171) aufweist, durch das die Betätigungseinheit (160) am oberen Endabschnitt derselben vorsteht;
    dadurch gekennzeichnet, dass
    die elastische Einheit (150) so eingerichtet ist, dass, wenn der obere Endabschnitt (164) der Betätigungseinheit (160) mit zunehmender Stärke gepresst wird, der konische Abschnitt (151) der elastischen Einheit (150) sich zuerst elastisch verformt, so dass der nach unten gerichtete Vorsprung (156) in dem konischen Abschnitt (151) auf den zungenförmigen Abschnitt (142) der beweglichen Kontakteinheit (140) presst, so dass der zungenförmige Abschnitt (142) mit der mittleren stationären Kontakteinheit (120) in Kontakt kommt, sich dann der nach unten gerichtete Vorsprung (156) elastisch um ein vorgegebenes Maß verformt und sich dann der nach oben gerichtete Vorsprung (153) elastisch verformt und abschließend sich wenigstens der nach oben gerichtete Vorsprung (153) oder der nach unten gerichtete Vorsprung (156) elastisch verformt, so dass der Vorsprung (163) am unteren Abschlussrand der Betätigungseinheit (160) den Schalterträger (110) berührt.
  2. Druckschalter nach Anspruch 1, wobei die Federkraft und das Maß der Zusammendrückbarkeit der elastischen Einheit (150) auf jeweilige vorgegebene Werte festgelegt sind, indem entweder ein Hohlraum vorgegebener Größe und Tiefe oder ein Einschnitt, der um die Mitte derselben herum symmetrisch ist und vorgegebene Größe und Tiefe hat, an wenigstens dem nach oben gerichteten Vorsprung (153) oder dem nach unten gerichteten Vorsprung (156) der elastischen Einheit (150) vorhanden ist.
  3. Druckschalter nach Anspruch 1, wobei die plane Fläche der oberen Abschlussseite (154) des nach oben gerichteten Vorsprungs (153) die plane Fläche der unteren Seite der Betätigungseinheit (160) berührt, und ein Vorsprung, der an einer Seite ausgebildet ist, mit einem Hohlraum in Eingriff kommt, der an der anderen Seite ausgebildet ist.
  4. Druckschalter nach Anspruch 1, wobei die äußere Seitenwand der Betätigungseinheit (160) und entweder das Loch (171), das durch den oberen Mittelabschnitt der Abdeckung (170) hindurch ausgebildet ist, oder die Innenseite der umgebenden Wand (172) unrunde Form haben und so eingerichtet sind, dass die Betätigungseinheit (160) bei Aufwärts- und Abwärtsbewegungen ohne Drehung in einer konstanten Richtung gewandt gehalten wird.
  5. Druckschalter nach Anspruch 1, wobei die äußere stationäre Kontakteinheit (130) und die mittlere Kontakteinheit (120), die beide von der Oberseite des Schalterträgers (110) her freiliegen, im Wesentlichen gleiche Höhe haben und der zungenförmige Abschnitt (142), der an dem Mittelabschnitt der beweglichen Kontakteinheit (140) angeordnet ist, an dem Verbindungsabschnitt (143) nach oben gebogen ist, der den zungenförmigen Abschnitt (142) mit dem äußeren Abschnitt (141) verbindet, damit ein vorgegebener Isolierspalt zwischen dem zungenförmigen Abschnitt (142) und der mittleren stationären Kontakteinheit (120) vorhanden ist.
EP19990125555 1998-12-21 1999-12-21 Druckschalter Expired - Lifetime EP1014405B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP36263798 1998-12-21
JP36263798A JP3890789B2 (ja) 1998-12-21 1998-12-21 プッシュスイッチ

Publications (3)

Publication Number Publication Date
EP1014405A2 EP1014405A2 (de) 2000-06-28
EP1014405A3 EP1014405A3 (de) 2001-12-05
EP1014405B1 true EP1014405B1 (de) 2007-02-14

Family

ID=18477369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990125555 Expired - Lifetime EP1014405B1 (de) 1998-12-21 1999-12-21 Druckschalter

Country Status (3)

Country Link
EP (1) EP1014405B1 (de)
JP (1) JP3890789B2 (de)
DE (1) DE69935119T2 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004134117A (ja) 2002-10-08 2004-04-30 Alps Electric Co Ltd 多段押し操作スイッチ装置
DE10331947A1 (de) 2003-07-15 2005-02-24 Huf Hülsbeck & Fürst Gmbh & Co. Kg Griff für Türen oder Klappen an Fahrzeugen
DE102008064212A1 (de) 2008-12-22 2010-06-24 Huf Hülsbeck & Fürst Gmbh & Co. Kg Griff für Türen oder Klappen, insbesondere an Fahrzeugen
JP5284883B2 (ja) * 2009-06-16 2013-09-11 ミック電子工業株式会社 押しボタンスイッチ
EP3327743B1 (de) * 2015-07-24 2021-05-26 Shin-Etsu Polymer Co., Ltd. Druckknopfschaltelement
KR101759170B1 (ko) * 2016-01-25 2017-07-18 현대자동차주식회사 듀얼 타입 스위치 및 이를 포함하는 차량
AU2018405470B2 (en) * 2018-02-01 2023-01-19 Razer (Asia-Pacific) Pte. Ltd. Key switch mechanisms, user input devices and methods of fabricating a key switch mechanism
JP7291866B2 (ja) * 2019-11-19 2023-06-16 ミック電子工業株式会社 押しボタンスイッチ

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603756A (en) * 1970-01-29 1971-09-07 Sperry Rand Corp Snap action switch
CH645205A5 (de) * 1978-12-01 1984-09-14 Maag Gummi Schaltmatte.
DE3447085A1 (de) * 1984-12-22 1986-07-03 Marquardt Gmbh, 7201 Rietheim-Weilheim Tastenschalter
JPS645327U (de) * 1987-06-30 1989-01-12
FR2650432A1 (en) * 1989-07-27 1991-02-01 Eaton Controls Sa Flexible electrical contact element and application of this flexible element
DE4112754C2 (de) * 1991-04-19 1999-06-02 Marquardt Gmbh Drucktastenschalter
JP3794068B2 (ja) * 1996-09-17 2006-07-05 松下電器産業株式会社 プッシュオンスイッチ
US5899617A (en) * 1997-10-09 1999-05-04 Chicony Electronics Co., Ltd. Flexible component reinforcing mechanism

Also Published As

Publication number Publication date
EP1014405A3 (de) 2001-12-05
JP3890789B2 (ja) 2007-03-07
EP1014405A2 (de) 2000-06-28
DE69935119T2 (de) 2007-06-06
DE69935119D1 (de) 2007-03-29
JP2000188037A (ja) 2000-07-04

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