EP0515943B1 - Druckschalter - Google Patents

Druckschalter Download PDF

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Publication number
EP0515943B1
EP0515943B1 EP92108383A EP92108383A EP0515943B1 EP 0515943 B1 EP0515943 B1 EP 0515943B1 EP 92108383 A EP92108383 A EP 92108383A EP 92108383 A EP92108383 A EP 92108383A EP 0515943 B1 EP0515943 B1 EP 0515943B1
Authority
EP
European Patent Office
Prior art keywords
button switch
push button
switch according
housing
spring
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
EP92108383A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0515943A2 (de
EP0515943A3 (en
Inventor
Bernd Schutzbach
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.)
Marquardt GmbH
Original Assignee
Marquardt GmbH
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 Marquardt GmbH filed Critical Marquardt GmbH
Publication of EP0515943A2 publication Critical patent/EP0515943A2/de
Publication of EP0515943A3 publication Critical patent/EP0515943A3/de
Application granted granted Critical
Publication of EP0515943B1 publication Critical patent/EP0515943B1/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
    • 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

Definitions

  • the invention relates to a switching module according to the preamble of claim 1.
  • a push button switch with a pot-shaped housing in which the lifting plunger is longitudinally displaceable against the pressure of a spiral spring.
  • a two-leg, approximately U-shaped contact spring is arranged on one side between the lifter and the inner wall of the housing, and a likewise two-leg leaf spring is arranged on the other side.
  • the characteristics of the contact spring and the leaf spring have to be adapted to the respective purpose, namely in the case of the contact spring for making contact and in the leaf spring of the pressure point and click noise generation.
  • these two springs are therefore not designed symmetrically, so that the switch has an asymmetrical actuation, which in turn leads to an unfavorable actuation force curve.
  • the lifting plunger can tilt during operation, which in turn results in unsafe switching behavior.
  • a pressure switch according to the preamble of claim 1 has become known from the generic US-A-5 015 811.
  • a disadvantage of such a switch is also the asymmetrical actuation of the switching element, which can lead to tilting or jamming of the lifting plunger and thus to incorrect switching behavior.
  • the invention has for its object to improve the force curve upon actuation in such a switching module so that an exact pressure point is achieved when switching and tilting of the bubbler is excluded during actuation.
  • the switching module according to the invention has the advantage over the known push button switch that an extremely precise pressure point is achieved when switching. This is done according to the invention by means of an additional detent spring which slides along a link or a control cam within the switch housing during the lifting movement.
  • Another advantage of the switching module according to the invention is that an extremely safe switching behavior is achieved, whereby tilting of the lifting plunger during operation is excluded.
  • the exact guidance of the lifting plunger is additionally improved by an inner cylinder located in the housing, the lifting plunger being arranged between the inner cylinder and the casing of the housing of the switching module.
  • This special design of the lifting plunger advantageously also allows the central arrangement of a light source in the switching module, so that uniform illumination of a cover cap surrounding the switching module can be achieved.
  • a switching module 1 is shown in side view and top view. 1, 2 and 5, this switching module 1 consists of an outer, pot-shaped housing 2, which has an outer jacket 3 and a closed bottom 4.
  • the cup-shaped housing 2 is open towards the top.
  • the housing 2 is square in cross section with the side length a.
  • This sectional side view is shown in Fig. 1a. 1b shows a section through two adjacent corners along the line 1b-1b from FIG. 4.
  • the section shown in Fig. 5 is a section through two diametrically opposite corners, i. H. a diagonal cut with the diagonal d.
  • the pot-shaped housing 2 has in its interior a longitudinally slotted cylinder 5, the upper edge 6 of which is arranged by an amount h 1 above the upper edge 7 of the jacket 3.
  • the inner cylinder 5 and the jacket 3 serve as a guide surface for a lifting plunger 8 to be inserted therebetween, the cross-section of which is also adapted square to the cup-shaped housing 2.
  • a compression spring 9 is inserted between the lifting plunger 8 and the housing base 4 and is guided into a corresponding inner guide 10 within the lifting plunger 8.
  • Inside the inner cylinder 5 there is a U-shaped contact spring 11 which is operatively connected with its one leg 12 to a first contact connection 13 and with its resilient second leg 14 to a second contact connection 15 (see FIG. 2a).
  • the contact connections 13, 15 are led out of the housing base 4 to the outside for a connection.
  • a radial web 17 with radially inner switching cams 18 reaches into the interior of the inner cylinder 5.
  • the switching cam 18 is pressed against the radially V-shaped end 21 of the movable leg 14 of the inner contact spring 11, so that the contact spring 11 stands out from the contact terminal 15.
  • the lifting plunger 8 is in its upper position, in which the switching cam 18 presses against the contact spring 11 and lifts it from the contact terminal 15.
  • the lifter 8 is in its lower position, in which the switching cam 18 is displaced downward, so that the movable leg 14 presses with its V-shaped contact end 21 against the contact terminal 15. 2a therefore shows the switched through, i.e. H. actuated state of the switching module.
  • a further detent spring 22 is provided, which consists of an annular bottom part 23, which rests on the inside of the bottom 4 in the interior of the housing, so that the compression spring 9 is not directly on the housing base 4 but on annular bottom part 23 abuts, as can be seen in particular from FIG. 5.
  • the annular base part extends around the cylindrical inner cylinder 5.
  • the detent spring 22 each has one axially parallel vertical leg 25, which has a V-shaped control lug 26 in its upper region (see Figures 1b and 2b).
  • This control lug 26 of the resilient leg 25 interacts with a cam 27 on the outer surface of the lifter 8.
  • this control curve is designed as a lower axially parallel section 28, as a radially widening bevel 29 and as an upper axially parallel section 30.
  • the defined switching point is essentially formed by the inclined section 29, since the resilient section of the vertical leg 25 with its control lug 26 must slide against the spring force over this inclined section. In the position according to FIG. 1b, a radial force 31 must therefore be applied to the control lug 26 through the bevel 29, which leads to a pressure switching point.
  • Fig. 1a the position is shown in which the pressure point rises when the switching module is actuated, since the control lug 26 must slide along the slope 29 against the spring force of the detent spring 22. If the control lug 26 has reached the upper vertical leg 30 of the control cam 27, the actuation becomes easier again.
  • the arrangement of the control lug 26 in connection with the switching cam 18 is such that the contact between the contact spring 11 and the contact terminal 15 is closed after the pressure point has been exceeded.
  • FIG. 1b accordingly shows the non-actuated position according to FIG. 1a, FIG. 2b the actuated position according to FIG. 2a.
  • the control lug 26 shown in FIGS. 1b, 2b is essentially V-shaped.
  • the control lug 40 of the detent spring 22 ' can also be hook-shaped, as can be seen in FIG. 5. 5, the lifter 8 is shown in the left half of the image in the actuated and in the right half of the image in the unactuated state.
  • the hook-shaped control lug 40 as already explained with the aid of the control lug 26, interacts with the control cam 27 to generate a pressure point when actuated.
  • the two lugs 41 are arranged opposite each other so that they are located in the middle between the two vertical legs 25. If the vertical legs 25 are arranged in the diagonally opposite corner regions 24 of the housing 2, the two lugs 41 are located in the two other opposite corner regions 42 of the housing 2 (see FIG. 4). As can also be seen in FIG. 4, the two corner regions 42 of the housing 2, which is otherwise essentially square in cross section, are provided with bevels 43 in order to allow the elongate projections 41 to rest against the casing 3 in the interior of the housing 2.
  • the lugs 41 are arranged on the base part 23 in such a way that they protrude slightly beyond the surface of the base part 23.
  • FIGS. 1b and 2b show the force-displacement diagram measured on a switching module according to the invention with the solid curve 47.
  • the abscissa shows the stroke of the lifter measured from the starting point in the unactuated state and the ordinate shows the force required in each case.
  • the force required for actuation first increases up to the pressure switching point P1.
  • the slope 29 of the control cam 27 is exceeded and the control cam 27 merges into the upper, axially parallel section 30 (see also FIGS. 1b and 2b).
  • the force required for the further movement of the lifting plunger drops sharply until the point P2 is reached and the contact between the contact connection 15 and the contact spring 11 is closed in the area between the points P1 and P3, the so-called switching range delimited by the two lines 46.
  • the switching module has a lighting unit 32, which is inserted from above into the inner part of the inner cylinder 5, and its two connections 33, 34 from the housing base 4 are brought out.
  • two bushings 45 with a circular cross section can be arranged in the wall of the inner cylinder 5, in which the connections 33, 34 run.
  • the detent spring can consist of an annular base part and only one axially parallel vertical resilient leg or more than two axially parallel vertical resilient legs.

Landscapes

  • Push-Button Switches (AREA)
  • Cookers (AREA)
EP92108383A 1991-05-27 1992-05-19 Druckschalter Expired - Lifetime EP0515943B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4117247 1991-05-27
DE4117247 1991-05-27

Publications (3)

Publication Number Publication Date
EP0515943A2 EP0515943A2 (de) 1992-12-02
EP0515943A3 EP0515943A3 (en) 1992-12-30
EP0515943B1 true EP0515943B1 (de) 1995-10-04

Family

ID=6432509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92108383A Expired - Lifetime EP0515943B1 (de) 1991-05-27 1992-05-19 Druckschalter

Country Status (3)

Country Link
EP (1) EP0515943B1 (es)
DE (2) DE4216454A1 (es)
ES (1) ES2077913T3 (es)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4239738C2 (de) * 1992-11-26 1996-03-28 Marquardt Gmbh Druckschalter
DE4330576C1 (de) * 1993-09-09 1994-11-10 Preh Elektro Feinmechanik Tastschalter
DE4437020A1 (de) * 1994-10-17 1996-04-18 Marquardt Gmbh Elektrischer Schalter
DE19548216B4 (de) * 1994-12-24 2006-06-14 Marquardt Gmbh Elektrischer Schalter
DE19548600B4 (de) * 1995-12-23 2006-09-28 Marquardt Gmbh Elektrischer Schalter
DE19647946C1 (de) * 1996-11-20 1998-05-07 Daimler Benz Ag Anordnung von Schaltern
DE19916795C1 (de) * 1999-04-14 2000-08-31 Itt Mfg Enterprises Inc Druckschalter
DE19929848B4 (de) * 1999-06-29 2009-06-10 Marquardt Gmbh Gehäuse, insbesondere für ein Bedienschalterfeld in einem Kraftfahrzeug
DE10341750A1 (de) * 2003-09-08 2005-03-31 Leopold Kostal Gmbh & Co Kg Anordnung zum Erzeugen einer Haptik eines manuell linearbewegten Stellgliedes
DE102008015336B4 (de) * 2008-03-20 2016-06-30 W. Gessmann Gmbh Drucktaster
US8207805B2 (en) 2009-03-17 2012-06-26 W. Gessmann Gmbh Push-button
DE102010030967B4 (de) 2010-07-06 2012-10-25 Lear Corp. Sitzanordnung mit Druckknopfanordnung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR900002525Y1 (ko) * 1984-07-11 1990-03-30 알프스덴기 가부시기 가이샤 푸시 버튼 스위치
DE3713775C2 (de) * 1987-04-24 1996-02-08 Cherry Mikroschalter Gmbh Tastenschalter
US4803362A (en) * 1987-10-27 1989-02-07 Labworks, Inc. Electro-optically activated switch with tactile feedback
JPH0212718A (ja) * 1988-06-30 1990-01-17 Omron Tateisi Electron Co 押ボタンスイッチ

Also Published As

Publication number Publication date
EP0515943A2 (de) 1992-12-02
ES2077913T3 (es) 1995-12-01
EP0515943A3 (en) 1992-12-30
DE4216454A1 (de) 1992-12-03
DE59203878D1 (de) 1995-11-09

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