EP0238899A1 - Tastschalter - Google Patents

Tastschalter Download PDF

Info

Publication number
EP0238899A1
EP0238899A1 EP87103002A EP87103002A EP0238899A1 EP 0238899 A1 EP0238899 A1 EP 0238899A1 EP 87103002 A EP87103002 A EP 87103002A EP 87103002 A EP87103002 A EP 87103002A EP 0238899 A1 EP0238899 A1 EP 0238899A1
Authority
EP
European Patent Office
Prior art keywords
switch
button
contact
housing
key
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.)
Withdrawn
Application number
EP87103002A
Other languages
German (de)
English (en)
French (fr)
Inventor
Manfred Böing
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.)
Schulte Elektrotechnik GmbH and Co KG
Original Assignee
Schulte Elektrotechnik GmbH and Co KG
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 Schulte Elektrotechnik GmbH and Co KG filed Critical Schulte Elektrotechnik GmbH and Co KG
Publication of EP0238899A1 publication Critical patent/EP0238899A1/de
Withdrawn legal-status Critical Current

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
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • 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
    • H01H13/22—Driving mechanisms acting with snap action
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/365—Bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches
    • H01H11/0012—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches for converting normally open to normally closed switches and vice versa

Definitions

  • the invention relates to a pushbutton switch with a housing, the bottom wall of which receives opposing contact pieces in pairs, and with a button which can be displaced within the housing against the force of a return spring and which actuates the contact bridges assigned to the contact pieces, a switch slide carrying the contact bridges within the button both opposite the Housing and slidably disposed relative to the button.
  • a key switch is known in which a key is displaceable against the force of a return spring within the housing.
  • the button comprises a slide switch which is displaceable in the axial direction and which is resiliently supported in relation to the button in the switch-on direction.
  • the switching movement is determined by the return spring.
  • the mutual mobility of the button and the slide switch enables a large idle stroke for the button. A jump circuit is not possible with this arrangement.
  • DE-PS 416 460 describes a push button switch with a contact bridge that can be alternately switched by a switching element.
  • the contact bridge is locked in the end positions by means of movable profile guides.
  • the movable profile guides are unlocked by the touch movement.
  • This push button switch describes a latching of the contact bridge in the on position and the off position. However, a jump function for the switchover movement is not provided.
  • DE-PS 196 115 describes a pressure switch, the contact bridges of which are supported by two mutually effective helical springs. The contact bridge is locked in the switch-on position. A spring is pretensioned during the switch-off movement and leads to a sudden switch-off movement. The switch-on movement is slow and smooth. A defined jump circuit is not provided here.
  • a key switch of the type mentioned is known from DE-OS 33 36 878.
  • an additional slide with wedge profiles triggers a jump during the switching process.
  • the additional slide with the wedge profiles is biased by a spring. This has an effect on the contact pressure during the switchover movement.
  • the object of the invention is a jump operation during the switch-on process and the switch-off process, but without the contact pressure being influenced thereby.
  • the switching noise should be as low as possible.
  • the slide switch sits inside the button on a coil spring, which is relaxed in each end position (switch-off and switch-on position) of the slide switch, that in each setting tension feet of the slide switch face the lugs of the housing and during the switching movement abut this end position on the respective clamping lugs, whereby the coil spring is prestressed when the button is switched on and the coil spring is tensioned when the button is switched off, and that the switching profiles of the button disengage the clamping feet of the slide switch to trigger the slide switch, so that the slide switch is accelerated by the preloaded coil spring.
  • the invention differs from the prior art in that the switch slide within the key is decoupled in its movement from the movement of the key. As a result, the slide switch can be moved in leaps and bounds regardless of the movement of the button, the speed of movement only depending on the tensioning force of the tension spring.
  • the switching movement is controlled via a switching profile.
  • the coil spring is relaxed in every end position and is subjected to either tension or pressure during the switching movement. This relieves the switch slide.
  • the clamping feet effective in the end positions determine the end positions of the slide switch.
  • the Switching noise is extremely low because there are no snap springs that generate a strong noise.
  • the coil springs are supported evenly and cause an even movement.
  • the push button switch can be fitted into a given plug system.
  • the contacting sections of the contact pieces are aligned in the axial direction of the housing and that the legs of the contact bridges slide along the contact pieces. Self-cleaning occurs as a result of the sliding movements.
  • the sliding contact also ensures freedom from bouncing.
  • Such sliding contact is already known per se from DE-OS 2 028 223.
  • the tensioning feet of the slide switch extend through slots in the ring of the button and that the slot edges are designed as switching profiles.
  • Such training is known per se from DE-OS 34 25 097.
  • the clamping feet which are effective in the two switching directions of the slide switch, are each offset by 90 ° in the circumferential direction.
  • the coil spring is effective both in the pulling direction and in the compression direction, it is provided that the ends of the coil spring engage in annular groove-shaped receptacles of the slide switch and the button. This results in a thread-like reception of the spring ends and a fixed holder.
  • the closure of the housing is achieved in that the housing is closed by a snap-on cover.
  • a so-called single-hole installation of the slide switch is ensured in that the housing has barb-like latching feet which face a flange of the cover.
  • the key switch can be designed as a make contact in such a way that for a make function in the protruding position of the key, the contact bridges of the slide switch are at a distance from the contact pieces and that in the pressed position of the button, the contact bridges electrically connect the contact pieces to one another.
  • This and the following feature are already known from DE-OS 34 25 097.
  • the key switch can also be designed as an opener such that the legs of the contact bridges abut the associated contact pieces for an opener function in the protruding position of the button, that the contact pieces protrude from plastic guideways, and that in the pressed-in position of the button, the legs of the contact bridges are lifted off the contact pieces by the action of the plastic guideways.
  • the key switch shown in Figures 1 to 4 is designed as a closer. It comprises an essentially cylindrical housing 1, the bottom wall 2 of which is designed as a base for contact pieces 3, 4, 5, 6. In the manner shown in FIG. 2, the contact pieces are arranged in a fixed manner according to a square pattern and aligned in the axial direction of the housing 1. The contact pieces directly form a unit with plug pins which are formed on the outside of the bottom wall 2 of the housing 1. These parts are known per se and are therefore not explained in detail.
  • the housing 1 has four locking lugs 7 in the region of the open end face. Barb-like locking feet 8 are also provided between the locking lugs 7, which protrude outwards from the peripheral wall of the housing 1.
  • the housing 1 is closed by a cover 9 which engages with tongues 10 over the locking lugs 7, the locking lugs 7 entering cutouts 11 in the tongues 10. This causes the cover to latch onto the housing 1.
  • the latching feet 8 hold the housing 1 in place after the pushbutton switch has been inserted into an installation hole in a mounting plate 12.
  • clamping lugs 13 and 14 are formed in pairs opposite one another, which are offset on the one hand in the circumferential direction by 90 ° and are also designed in opposite directions in their direction of action. The function the water clamping lugs 13, 14 will be explained in detail.
  • a button 15 is guided inside the housing 1 and extends through a passage of the cover 9.
  • the button 15 has an annular wall 16.
  • a helical compression spring 17 is supported, which is also supported on the bottom wall 2 of the housing 1 and provides the restoring force for the button 15.
  • 16 pairs of slots 18 and 19 are provided within the ring wall. These slots allow the ring wall 16 to slide over the clamping lugs 13 and 14 without the movement of the key 15 being impaired thereby.
  • a switching slide 20 is arranged in the axial direction within the ring wall 16 of the key 15.
  • This slide switch 20 carries two pairs of flexible feet 21, 22 which cooperate with the clamping lugs 13 and 14 and which each pass through slots 18 and 19.
  • the slide switch receives two contact bridges 23, the legs 24 of which interact with the contact pieces 3, 4, 5, 6.
  • the arrangement of the switching bridges 23 can be seen in particular from FIGS. 2 and 3; the legs 24 are aligned in the axial direction of the housing 1.
  • the slide valve 20 has a receptacle 25 with annular grooves 26 into which one end of a coil spring 27 can be screwed so that the coil spring 27 is thereby held in the annular grooves 26.
  • the other end of the coil spring is held in a corresponding manner in annular grooves 28 of a receptacle 29 of the key 15. So the ends of the coil spring 27 are held in the receptacle 25 of the slide switch 20 and in the receptacle 29 of the key 15, so that the coil spring 27 can be effective both as a compression spring and as a tension spring.
  • the function of the pushbutton switch is explained below on the basis of the switchover between the protruding position of the button 15 according to FIG. 3 and the pressed-in position of the button 15 according to FIG. 4. 1 to 4 is designed as a closer, the circuit is interrupted in the protruding position of the button 15.
  • the helical spring 17 pretensions the button 15 in the protruding position or switch-off position according to FIG. 3.
  • the coil spring 27 is relaxed in this position and thus holds the slide switch 20 firmly.
  • the clamping feet 21 of the slide switch 20 face the clamping lugs 13.
  • the clamping feet 21 come into contact with the clamping lugs 13 and thereby hold the slide switch 20 in place. As a result, the coil spring 27 is compressed so that spring force is stored. Finally, the walls 30 of the slots 18 come into engagement with the clamping feet 21 and act as a switching profile for the clamping feet 21 by pushing the clamping feet 21 radially inwards. As a result, the clamping feet 21 are released from the clamping lugs 13, so that the slide switch 20 can be moved suddenly by the compressive force of the helical spring 27. The slide switch 20 thus moves into the switch-on position, in which the legs 24 of the contact bridges 23 rest on the contact pieces 3, 4, 5, 6 and thereby close the circuit. This depressed position or switch-on position of the key 15 is shown in FIG. 4. The coil spring 27 relaxes and holds the slide switch 20 in a relaxed state. This prevents contact bouncing.
  • the invention ensures an abrupt and sudden contact closure, so that arcing is largely excluded. Since the helical compression spring is also relaxed in the ON position, the ON position of the slide switch 20 is determined solely by the relaxed length of the coil spring 27. As a result, the push button switch works without bounce. This is of great importance for the function and the service life of the switch. Since the legs 24 of the contact bridges 23 move in the axial direction and slide past the contact surfaces of the contact pieces 3, 4, 5, 6, this ensures self-cleaning of the contact surfaces.
  • the helical compression spring 17 presses the button 15 back into the switched-off position.
  • the clamping feet 22 of the slide switch 20 are in contact with the clamping lugs 14, cf. Fig. 4. This extends the coil spring 27.
  • a tensile force is stored in the coil spring 27.
  • the edges 31 act as switching profiles for the clamping feet 22 and press the clamping feet 22 radially inward so that they come free from the clamping lugs 14. Then there is a sudden shift of the slide switch 20 so that the contacts are torn open. A jump function of contact separation is also guaranteed here. This largely suppresses an arc.
  • FIG. 5 An embodiment of the push button switch as a break contact is shown in Fig. 5.
  • the legs 54 of the contact bridges 53 are extended so that they rest on the contact pieces in the protruding position of the key 15.
  • Fig. 5 shows in the left half the protruding position of the button 15. In this waiting position or basic position, the circuit is closed.
  • the contact pieces 3, 4, 5, 6 are embedded in guideways 32 made of plastic or insulating material.

Landscapes

  • Push-Button Switches (AREA)
EP87103002A 1986-03-19 1987-03-03 Tastschalter Withdrawn EP0238899A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863609127 DE3609127A1 (de) 1986-03-19 1986-03-19 Tastschalter
DE3609127 1986-03-19

Publications (1)

Publication Number Publication Date
EP0238899A1 true EP0238899A1 (de) 1987-09-30

Family

ID=6296703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87103002A Withdrawn EP0238899A1 (de) 1986-03-19 1987-03-03 Tastschalter

Country Status (2)

Country Link
EP (1) EP0238899A1 (enrdf_load_stackoverflow)
DE (1) DE3609127A1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1557853A1 (en) * 2004-01-23 2005-07-27 Calsonic Kansei Corporation Push button switch for vehicle
CN101395684B (zh) * 2006-03-29 2010-12-08 西门子公司 具有多个反向卷绕螺旋压簧组成的接触压力装置的绝缘操纵杆

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3934573A1 (de) * 1989-10-17 1991-04-25 Diehl Gmbh & Co Schalteinrichtung fuer endstellungs-detektion
DE3936942A1 (de) * 1989-11-06 1991-05-08 Jaeger Lecoultre Sa Drucktastenanordnung
DE102008009815B4 (de) 2008-02-19 2016-09-29 Robert Bosch Gmbh Rückzugkugel für eine hydrostatische Kolbenmaschine und System aus einer solchen Rückzugskugel und aus einer Vielzahl von Federn
DE102017113416B3 (de) 2017-06-19 2018-06-07 Fixtest Prüfmittelbau GmbH Mikroschalter und prüfsystem

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2466970A (en) * 1945-09-04 1949-04-12 Robert Hetherington & Son Inc Taper snap switch
US3142742A (en) * 1961-02-03 1964-07-28 Controls Co Of America Plunger actuated switch construction
US4079220A (en) * 1976-03-10 1978-03-14 The Bendix Corporation Snap action switch
DE2839108B2 (de) * 1978-09-08 1981-01-22 Rudolf Schadow Gmbh, 1000 Berlin Drucktasten-Schnappschalter
DE3425097A1 (de) * 1984-07-07 1986-02-06 Schulte-Elektrotechnik GmbH & Co KG, 5880 Lüdenscheid Elektrischer tastschalter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE416460C (de) * 1923-03-17 1925-07-16 Willy Kratzsch Druckknopfschalter
DE961115C (de) * 1954-12-11 1957-04-04 Bender & Wirth Als Druckschalter ausgebildeter elektrischer Kleinschalter, insbesondere Einbauschalter
GB1298946A (en) * 1969-06-12 1972-12-06 Lucas Industries Ltd Electrical switches
DE2651376C2 (de) * 1975-11-12 1985-06-13 A.B. Electronic Components Ltd., Abercynon, Mid-Glamorgan, Wales Drucktastenanordnung zur Betätigung mindestens eines Schaltkontaktes eines elektrischen Schalters
DE3336878A1 (de) * 1983-10-11 1985-05-02 Leopold Kostal GmbH & Co KG, 5880 Lüdenscheid Elektrischer schnappschalter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2466970A (en) * 1945-09-04 1949-04-12 Robert Hetherington & Son Inc Taper snap switch
US3142742A (en) * 1961-02-03 1964-07-28 Controls Co Of America Plunger actuated switch construction
US4079220A (en) * 1976-03-10 1978-03-14 The Bendix Corporation Snap action switch
DE2839108B2 (de) * 1978-09-08 1981-01-22 Rudolf Schadow Gmbh, 1000 Berlin Drucktasten-Schnappschalter
DE3425097A1 (de) * 1984-07-07 1986-02-06 Schulte-Elektrotechnik GmbH & Co KG, 5880 Lüdenscheid Elektrischer tastschalter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1557853A1 (en) * 2004-01-23 2005-07-27 Calsonic Kansei Corporation Push button switch for vehicle
US7064287B2 (en) 2004-01-23 2006-06-20 Calsonic Kansei Corporation Push button switch for vehicle
CN101395684B (zh) * 2006-03-29 2010-12-08 西门子公司 具有多个反向卷绕螺旋压簧组成的接触压力装置的绝缘操纵杆

Also Published As

Publication number Publication date
DE3609127A1 (de) 1987-10-01
DE3609127C2 (enrdf_load_stackoverflow) 1988-05-05

Similar Documents

Publication Publication Date Title
DE3229465C2 (enrdf_load_stackoverflow)
DE3101791C2 (enrdf_load_stackoverflow)
DE2260346A1 (de) Drucktaste
DE69023122T2 (de) Durch eine Schwenktaste betätigter Schalter.
DE2118923C2 (de) Elektrischer Drucktastenschalter
EP0238899A1 (de) Tastschalter
DE4409460C1 (de) Elektrischer Schalter
DE3513141A1 (de) Tastschalter mit herzfoermiger fuehrungsnut
EP0252449B1 (de) Drucktastenschalter, insbesondere Tastschalter
DE19703394C1 (de) Tastenanordnung
EP0036432B1 (de) Schütz, insbesondere Leistungs- oder Steuer- oder Starter-Schütz
DE19642744C2 (de) Schaltervorrichtung
DE2541922A1 (de) Verriegelter drucktastenschalter
WO1992001302A1 (de) Einrichtung zum übertragen einer linearbewegung mit hilfe eines tastelements
DE10134895C1 (de) Drucktastenschalter mit Rasthaltung
DE2515972A1 (de) Positions- oder betriebsartanzeiger fuer einen druckschalter
DE69501990T2 (de) Drehschalter mit verriegelbarer Position
DE3842877A1 (de) Schaltvorrichtung
DE102006021686A1 (de) Not-Aus-Schaltgerät
DE2607186A1 (de) Drucktastenschalter mit einem beweglichen, einrastbaren schieber
DE4239738C2 (de) Druckschalter
EP0326807B1 (de) Tastschalter
DE3324253A1 (de) Tastenschalter
DE2839108A1 (de) Drucktasten-schnappschalter
DE8907888U1 (de) Vorrichtung zum Ein- und Ausschalten elektrischer Geräte

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): ES FR GB IT SE

17P Request for examination filed

Effective date: 19880329

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

17Q First examination report despatched

Effective date: 19901212

18W Application withdrawn

Withdrawal date: 19910110

R18W Application withdrawn (corrected)

Effective date: 19910110

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BOEING, MANFRED