EP1071106B1 - Zweistufiger Druckschalter - Google Patents

Zweistufiger Druckschalter Download PDF

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Publication number
EP1071106B1
EP1071106B1 EP00402018A EP00402018A EP1071106B1 EP 1071106 B1 EP1071106 B1 EP 1071106B1 EP 00402018 A EP00402018 A EP 00402018A EP 00402018 A EP00402018 A EP 00402018A EP 1071106 B1 EP1071106 B1 EP 1071106B1
Authority
EP
European Patent Office
Prior art keywords
membrane
push button
conductive
button switch
function
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
EP00402018A
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English (en)
French (fr)
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EP1071106A1 (de
Inventor
Jean-Christophe Villain
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.)
TCT Mobile Ltd
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TCT Mobile Ltd
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Filing date
Publication date
Application filed by TCT Mobile Ltd filed Critical TCT Mobile Ltd
Publication of EP1071106A1 publication Critical patent/EP1071106A1/de
Application granted granted Critical
Publication of EP1071106B1 publication Critical patent/EP1071106B1/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
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/64—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member wherein the switch has more than two electrically distinguishable positions, e.g. multi-position push-button switches
    • 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
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/48—Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2225/00—Switch site location
    • H01H2225/018—Consecutive operations

Definitions

  • the invention relates to a pressure switch for controlling at least two functions in response to a pressure exerted on the switch, respectively.
  • Such a switch is used for different types of electrical equipment, such as, for example, photographic devices, camcorders or telephones.
  • the purpose of this switch is to minimize the number of keys and increase the ergonomics of these devices.
  • this type of switch by a first pressing of low pressure, it operates a first function, such as for example a preparatory mode as a preselection.
  • a second function is activated, such as for example an operational mode as a validation of the preselection.
  • No. 5,313,027 which is considered to be the closest state of the art, discloses a switch of the aforementioned type comprising an insulating substrate having an outer annular contact zone and an inner annular contact zone.
  • a deformable conductive cup disposed opposite said zones, is adapted to be in contact with the outer zone firstly following a first bearing on the latter and secondly on the two zones following a second support of stronger pressure.
  • the cup is covered with an insulating membrane which is fixed to the substrate by means of spacers in order to keep the cup away from the zones, in the rest position.
  • This switch has a number of disadvantages. Not only are additional pieces necessary to keep the cup off the substrate, but it is also difficult to control the space required between the cup and the substrate in such a situation. The edges of the cup must indeed extend in a plane parallel to the substrate so that the contact following the first support is complete.
  • switches comprising a pair of cups arranged one above the other so that by a first support, the outer cup pushes the inner cup in contact with the outer zone of the substrate and by a second support, the inner cup further comes in contact with the inner area.
  • the invention therefore aims to overcome the disadvantages of the prior art by providing a high performance switch, simple to implement and minimum space requirement, this switch to allow ergonomic use to access different functions.
  • the invention proposes a switch of the aforementioned type, comprising an insulating substrate comprising at least a first and a second conductive area able to trigger respectively a first and a second function.
  • At least the first conductive zone comprises at least two electrically insulated portions of the other, the first portion being connected to an input track and the second portion to an output track.
  • the second conductive zone is further connected to at least one additional output track.
  • the switch further comprises a membrane comprising at least a first and a second contact areas able to contact respectively the first and second conductive areas depending on the pressure exerted on the membrane.
  • the first contact zone comprises at least two regions electrically interconnected and able to contact the portions respectively, so as to connect the input and output tracks together.
  • the invention also relates to electrical equipment comprising a pressure switch mentioned above, and means of execution of at least first and second functions, the execution of the functions being triggered in response respectively to a pressure exerted on the switch.
  • the function triggered in the first solicitation position is for example a preselection function, while the function triggered in the second solicitation position is for example a selection function.
  • the insulating substrate comprises two conductive zones each forming a substantially circular ring, the first conductive zone being external to the second conductive zone.
  • the first conductive zone comprises at least three portions, a first of which is connected to an input track and the second and third are connected by output tracks to programmed circuits so that the first function is triggered as soon as the three portions are contacted by the corresponding regions.
  • the first conductive zone comprises at least three portions, of which a first is connected to an input track and the second and third are connected by output tracks to programmed circuits so that a first action is triggered when the first and second portions are contacted, while a second action is triggered when the first and third portions are contacted.
  • the electrical equipment may comprise means for executing at least two actions allowing displacement in two different directions of a cursor, in response to the activation of the switch.
  • the switch can then be part of a navigation button.
  • At least a portion of the outer face of the membrane adheres to a flexible holding envelope, adjacent to the insulating substrate outside the conductive zones. This envelope keeps the membrane in the rest position while allowing its passage in first and second biasing positions.
  • the switch of the invention further comprises a key adapted to act on the outer face of the membrane to exert pressure.
  • the switch 1 comprises an insulating substrate 2 comprising tracks and electrical circuits and surmounted by a membrane 3 adapted to make contact with these electrical circuits.
  • the membrane 3 is moved and deformed under the effect of pressures exerted on its outer face 3a by a key 4.
  • the insulating substrate 2 is formed of a plate having a first and a second conductive regions 6, 7 each forming a substantially circular ring.
  • the first conductive zone 6 is external to the second conductive zone 7.
  • the first conductive zone 6 comprises four portions A, B, C, D, which are electrically isolated and electrically isolated from one another.
  • Each of these portions A, B, C, D has the general shape of a disc. Of course, other forms can be envisaged.
  • the portions A to D are distributed circumferentially along the ring forming said first conductive zone 6, with, in the present embodiment, a constant distance, of the order of 90 ° between them.
  • the first portion A is connected to an input track 8, adapted to bring electric current.
  • the second and third portions B, C which are arranged on either side of the first portion A, are each connected by an output track 9, 10 to a particular electrical circuit 11, 12.
  • the fourth portion D which is arranged opposite the first portion A, is electrically inactive. It is indeed connected to no circuit.
  • first and fourth portions A, D are aligned along a plane substantially perpendicular to the plane along which the second and third portions B, C are aligned (see FIGS. 3 and 5).
  • the electrical circuits 11 and 12 are programmed so that when a contact is established simultaneously with each of the portions A to D, a first function is performed.
  • This function is for example a preselection in a menu that can be displayed on a screen (not shown) connected to the switch 1.
  • the electrical circuit 11 can be programmed so that a first action is performed when the contact is established simultaneously with the portions A, B, D.
  • the electrical circuit 12 can be programmed so that a second action is performed when the contact is established simultaneously with the portions A, C, D.
  • the second conducting zone 7 comprises a single portion E of shape and dimension similar to those of the portions A to D.
  • the portion E is disposed at the center of the ring having the portions A to D. It is therefore equidistant from each of them.
  • the portion E is connected by an output track 13 to an electric circuit 14, programmed so that when a contact is established simultaneously with each of the portions A to E, a second function is performed.
  • This second function is for example a validation function of a preselected choice at the end of the first function or action.
  • the second function is executed as soon as the simultaneous contact with the portions A, B, D, E or A, C, D, E is established, as long as the portion D exists.
  • the second function can be executed only if the portion A, which is connected to a current input track, and the portion E are contacted simultaneously.
  • the second conductive zone 7 comprises several portions in the same manner as the first conductive zone 6 to allow the execution of other functions.
  • the membrane 3 has the shape of a cup of substantially circular general section. More precisely, it has a hemispherical general shape.
  • the membrane 3 has on its inner face 3b, which is intended to come opposite the insulating substrate 2, a first and a second contact areas 15, 16.
  • these contact zones 15, 16 are able to contact respectively the first and the second conductive zones 6, 7 as a function of the pressure exerted on the membrane 3.
  • the first contact zone 15 comprises four regions A ', B', C ', D' interconnected electrically and capable of respectively contacting the portions A, B, C, D, so as to connect the input tracks to each other. 8 and output 9, 10.
  • the portions A 'to D' are part of a tab 15a to 15d projecting from the free edge 17 of the membrane 3.
  • the membrane 3 is formed of a hemispherical dome 18 extended from its free edge 17 by four tabs 15a to 15d.
  • the gap separating two adjacent tabs is constant and of the order of 90 °.
  • Each of the legs 15a to 15d follows the general curvature of the dome 18.
  • the regions A 'and D' extend in the same first plane, while the regions B 'and C' extend in the same second plane, substantially parallel to the first plane, the second plane being closer to the top of the dome 18.
  • the gap between the two planes is of the order of 0.2 millimeters.
  • the membrane 3 has substantially a star shape with four branches.
  • the membrane 3 When the membrane 3 is placed, without effort or pressure, on the insulating substrate 2 with its concavity facing the conductive areas 6, 7, the free edge 17 is spaced apart from the insulating substrate 2.
  • the membrane 3 is arranged so that the region A 'rests on the portion A and the region D' rests on the portion D.
  • This position of the membrane 3 corresponds to the rest position (see FIGS. 5 to 7).
  • the difference between the planes comprising the regions A ', D' on the one hand and the regions B ', C' on the other hand is minimum so that the displacement of the membrane 3 to pass from the position of rest in the first bias position is reduced.
  • the second contact zone 16 comprises a single contact region E 'adapted to be in contact with the portion E.
  • This region E ' can be in contact with the corresponding portion E only when the membrane 3 is deformed so that its concavity is reversed under the effect of a sufficiently high pressure.
  • the membrane 3 is then in its second biasing position (see Figure 9).
  • the membrane 3 is made in one piece in a conductive material. It is for example electrically conductive metal.
  • the membrane 3 is held in the rest position by means of a flexible holding envelope 19, such as a thin film.
  • the material of the holding envelope 19 must be sufficiently thin and flexible to prevent any deformation of the membrane 3. It must indeed allow at least the transition from the rest position to the first and second biasing positions.
  • the holding envelope 19 is for example made of flexible plastic material or paper.
  • This holding envelope 19 is fixed rigidly, for example by gluing, to at least a portion of the outer face 3a (for example the outer face of the dome 18), or even to its entire surface. It thus substantially matches the outer shape of the membrane 3.
  • the holding envelope 19 is also fixed rigidly to the insulating substrate 2 outside the conductive zones 6, 7 (see FIGS. 1 and 5 to 8).
  • the membrane 3 is urged by means of a key 4 adapted to be in contact with the holding envelope 19.
  • the key 4 is formed of two superimposed solid cylinders 4a, 4b by their base.
  • One of the cylinders 4a has a larger diameter than the other.
  • the small cylinder 4b is intended to be in contact, by its base opposite the cylinder 4a, with the holding envelope 19 at least at the top of the dome 18.
  • the other cylinder 4a is intended to receive the finger of the user.
  • the key 4 thus has a cross section T-shaped.
  • the surface adapted to receive the finger of the user is curved with its concavity facing outwards so as to facilitate support to zones A, B, D or A, C, D.
  • the movement of the key 4 is guided and limited by a wall extending substantially parallel to the insulating substrate 2 and surrounding said key.
  • the key 4 exerts no pressure on the membrane 3. It is preferably discarded.
  • each pair of legs 15a-15d and 15b-15c allows a certain balance and stability of the membrane 3 in the rest position.
  • the dome 18 is not deformed. Only a support at the top of the dome 18 makes it possible to lower the tabs 15b and 15c towards the insulating substrate 2.
  • the symmetry of the tabs 15b and 15c makes it possible to guarantee simultaneous contact of the two tabs 15b, 15c when effective support has been exerted on the membrane 3.
  • the membrane is poorly fixed (for example, the plane comprising the regions B ', C' is not exactly parallel to the insulating substrate 2) so that in the rest position, only one of the legs 15b, 15c is in contact with the insulating substrate 2, the first function can be performed only after the support on the membrane 3 and not inadvertently.
  • the dome 18 When the key 4 is released, the dome 18 automatically returns to its rest position and the tabs 15b and 15c are spaced apart from the insulating substrate 2. The membrane 3 then returns to its rest position.

Landscapes

  • Push-Button Switches (AREA)
  • Vehicle Body Suspensions (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Keying Circuit Devices (AREA)
  • Braking Systems And Boosters (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (16)

  1. Druckschalter, dazu bestimmt, wenigstens zwei Funktionen jeweils als Reaktion auf einen auf den Schalter ausgeübten Druck zu steuern, welcher aufweist:
    - einen isolierenden Träger (2) mit wenigstens einer ersten und einer zweiten leitenden Zone (6, 7), welche dazu geeignet sind, jeweils eine erste und eine zweite Funktion auszulösen, wobei wenigstens die erste leitende Zone (6) wenigstens zwei elektrisch voneinander isolierte Abschnitte (A, B, C, D) aufweist, wobei der erste Abschnitt (A) mit einer Eingangsbahn (8) und der zweite Abschnitt (B, C) mit einer Ausgangsbahn (9, 10) verbunden ist, wobei die zweite leitende Zone (7) des weiteren mit wenigstens einer zusätzlichen Ausgangsbahn (13) verbunden ist;
    - eine Membrane (3) mit wenigstens einer ersten und einer zweiten Kontaktzone (15, 16), die dazu geeignet sind, jeweils mit der ersten und der zweiten leitenden Zone (6, 7) entsprechend dem auf die Membran ausgeübten Druck in Kontakt zu kommen; wobei die erste Kontaktzone (15) wenigstens zwei Bereiche (A', B', C', D') aufweist, die elektrisch miteinander verbunden sind und geeignet sind, jeweils mit den Abschnitten (A, B, C, D) in Kontakt zu kommen, um so die Eingangs- und Ausgangsbahn miteinander zu verbinden, dadurch gekennzeichnet, dass die Membran wenigstens drei Positionen einnehmen kann:
    - eine Ruheposition, in der sie teilweise wenigstens mit der ersten leitenden Zone (6) in Kontakt ist, wobei die Eingangsbahn (8) mit keiner Ausgangsbahn in Kontakt ist, wobei keine Funktion ausgeführt wird;
    - eine erste Impulsposition, in der ein erster Halt die Verbindung zwischen der Eingangs- (8) und der Ausgangsbahn (9, 10) der ersten leitenden Zone (6) bewirkt, wobei die erste Impulsposition dazu bestimmt ist, die Ausführung der ersten Funktion auszulösen; und
    - eine zweite Impulsposition, in der ein zweiter Halt, mit größerer Kraft als der erste, den Kontakt jeder Kontaktzone (15, 16) mit jeder leitenden Zone (6, 7) bewirkt, wobei die zweite Impulsposition dazu bestimmt ist, die Ausführung der zweiten Funktion auszulösen.
  2. Druckschalter gemäß Anspruch 1, dadurch gekennzeichnet, dass die Membran (3) eine verformbare Schale ist, die derart angeordnet ist, dass ihre konkave Wölbung zu den leitenden Zonen (6, 7) gedreht ist.
  3. Druckschalter gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Membran (3) einen im wesentlichen kreisförmigen Querschnitt aufweist.
  4. Druckschalter gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass jeder Bereich (A', B', C', D') Teil eines Beins (15a, 15b, 15c, 15d) ist, das aus dem freien Rand (17) der Membran (3) vorsteht.
  5. Druckschalter gemäß einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Innenseite (3b) der Membran, die den leitenden Zonen (6, 7) gegenüberliegt, ein leitendes Material aufweist.
  6. Druckschalter gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der isolierende Träger (2) zwei leitende Zonen (6, 7) aufweist, die jede einen im wesentlichen kreisförmigen Ring beschreiben, wobei die erste leitende Zone (6) bezogen auf die zweite leitende Zone (7) außen liegt.
  7. Druckschalter gemäß einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die zweite leitende Zone (7) einen einzelnen Abschnitt (E) aufweist.
  8. Druckschalter gemäß einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die erste leitende Zone (6) wenigstens drei Abschnitte (A, B, C) aufweist, von denen ein erster (A) mit einer Eingangsbahn (8) verbunden ist und der zweite und dritte (B, C) über Ausgangsbahnen (9, 10) mit Schaltkreisen (11, 12) verbunden sind, die derart programmiert sind, dass die erste Funktion ausgelöst wird, wenn die drei Abschnitte (A, B, C) über die entsprechenden Bereiche (A', B', C') in Kontakt sind.
  9. Druckschalter gemäß einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die erste leitende Zone (6) wenigstens drei Abschnitte (A, B, C) aufweist, von denen ein erster (A) mit einer Eingangsbahn verbunden ist und der zweite und dritte (B, C) über Ausgangsbahnen mit Schaltkreisen verbunden sind, die derart programmiert sind, dass die erste Aktion ausgelöst wird, wenn der erste und der zweite Abschnitt (A, B) in Kontakt sind, wohingegen eine zweite Aktion ausgeführt wird, wenn der erste und der dritte Abschnitt (A, C) in Kontakt sind.
  10. Druckschalter gemäß einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass der zweite und der dritte Abschnitt (B, C) auf beiden Seiten des ersten (A) angeordnet sind.
  11. Druckschalter gemäß einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass dieser eine weiche Stützhülle (19) aufweist, an welcher ein Teil wenigstens der Außenfläche (3a) der Membran (3) anhaftet und welche an den isolierenden Träger (2) zur Außenseite der leitenden Zonen (6, 7) angrenzt, wobei die Hülle die Membran in Ruheposition hält, wobei gleichzeitig deren Übergang in die erste und zweite Impulsposition ermöglicht wird.
  12. Druckschalter gemäß einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass dieser des Weiteren eine Taste (4) aufweist, die geeignet ist, auf die Außenfläche (3a) der Membran zu wirken, um dort Drücke auszuüben.
  13. Navigationsknopf, dadurch gekennzeichnet, dass dieser einen Druckschalter gemäß Anspruch 9 oder gemäß einem der Ansprüche 10 bis 12, wenn diese von Anspruch 9 abhängen, aufweist.
  14. Elektrische Ausrüstung mit einem Druckschalter gemäß einem der Ansprüche 1 bis 13, und mit Mitteln zur Ausführung wenigstens einer ersten und einer zweiten Funktion, wobei die Ausführung der Funktionen jeweils als Reaktion auf einen auf den Schalter ausgeübten Druck ausgelöst wird.
  15. Elektrische Ausrüstung gemäß Anspruch 14, dadurch gekennzeichnet, dass die in der ersten Impulsposition ausgelöste Funktion eine Vorauswahlfunktion ist, wohingegen die in der zweiten Impulsposition ausgelöste Funktion eine Auswahlfunktion ist.
  16. Elektrische Ausrüstung gemäß Anspruch 14 oder 15, dadurch gekennzeichnet, dass diese Mittel zum Ausführen von wenigstens zwei Aktionen aufweist, die das Versetzen in zwei unterschiedlichen Richtungen eines Cursors als Reaktion auf die Aktivierung des Schalters ermöglichen.
EP00402018A 1999-07-19 2000-07-13 Zweistufiger Druckschalter Expired - Lifetime EP1071106B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9909340A FR2796754B1 (fr) 1999-07-19 1999-07-19 Commutateur a double pression
FR9909340 1999-07-19

Publications (2)

Publication Number Publication Date
EP1071106A1 EP1071106A1 (de) 2001-01-24
EP1071106B1 true EP1071106B1 (de) 2006-05-24

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Country Status (11)

Country Link
US (1) US6498312B1 (de)
EP (1) EP1071106B1 (de)
JP (1) JP2001067989A (de)
CN (1) CN1194364C (de)
AT (1) ATE327564T1 (de)
AU (1) AU4862700A (de)
DE (1) DE60028141T2 (de)
ES (1) ES2265325T3 (de)
FR (1) FR2796754B1 (de)
HU (1) HUP0002605A3 (de)
PT (1) PT1071106E (de)

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CN107615432B (zh) * 2015-09-30 2020-05-22 阿尔卑斯阿尔派株式会社 按压开关
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HUP0002605A2 (en) 2001-03-28
HU0002605D0 (en) 2000-09-28
CN1194364C (zh) 2005-03-23
ATE327564T1 (de) 2006-06-15
HUP0002605A3 (en) 2001-05-28
JP2001067989A (ja) 2001-03-16
AU4862700A (en) 2001-01-25
EP1071106A1 (de) 2001-01-24
FR2796754B1 (fr) 2002-04-12
PT1071106E (pt) 2006-09-29
DE60028141D1 (de) 2006-06-29
ES2265325T3 (es) 2007-02-16
US6498312B1 (en) 2002-12-24
CN1281233A (zh) 2001-01-24
DE60028141T2 (de) 2007-03-08
FR2796754A1 (fr) 2001-01-26

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