EP0004544A2 - Elément interrupteur avec des positions d'arrêt - Google Patents

Elément interrupteur avec des positions d'arrêt Download PDF

Info

Publication number
EP0004544A2
EP0004544A2 EP79100425A EP79100425A EP0004544A2 EP 0004544 A2 EP0004544 A2 EP 0004544A2 EP 79100425 A EP79100425 A EP 79100425A EP 79100425 A EP79100425 A EP 79100425A EP 0004544 A2 EP0004544 A2 EP 0004544A2
Authority
EP
European Patent Office
Prior art keywords
contact
switching element
springs
contact carrier
element according
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
Application number
EP79100425A
Other languages
German (de)
English (en)
Other versions
EP0004544B1 (fr
EP0004544A3 (en
Inventor
Wolfgang Karpe
Johannes Kluge
Klaus-Dieter Oemus
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.)
Mannesmann Demag AG
Original Assignee
Mannesmann Demag AG
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 Mannesmann Demag AG filed Critical Mannesmann Demag AG
Publication of EP0004544A2 publication Critical patent/EP0004544A2/fr
Publication of EP0004544A3 publication Critical patent/EP0004544A3/xx
Application granted granted Critical
Publication of EP0004544B1 publication Critical patent/EP0004544B1/fr
Expired 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

Definitions

  • the invention relates to a switching element with a push button for axially displacing a contact carrier provided with contacts, which is guided in a housing and is acted upon by a return spring in the zero position, which also has locking points for locking bodies acted on by locking springs.
  • the switching element according to DE-OS 2056 943 is a limit switch or limit switch and has only one on and off switch position and no further switch positions, as are required for switching different speeds of motors.
  • the contact support projects in this switching element with an actuating end out of the housing where it can probably be operated directly from a machine part, but not by a aumen p a finger or because he jumps when crossing the dead center position suddenly in a different position, that he is when you suddenly push in what you can possibly take. When loosened, however, it experiences a sudden acceleration, which would have a painful impact on the finger or thumb.
  • the object of the invention is therefore to provide an easy-to-use switching element with snap action for several switching positions.
  • This object is achieved in that the push button is supported on the contact carrier via a biasing spring, at which the locking points for a plurality of switching positions in the direction of movement of the contact carrier are arranged next to one another.
  • the operator presses the push button with his thumb and tensions the preload spring.
  • the contact carrier jumps into the following switching position, the biasing spring being relaxed and the return spring being tensioned.
  • the back pressure of the push button on the thumb changes, but the push button does not suddenly disappear, which would be very unpleasantly noticeable.
  • the pretensioning spring is tensioned again and the.
  • Latching springs are compressed which, when the latching point is exceeded, drive the contact carrier into the further switching position and further tension the return spring while the biasing spring is relaxed again.
  • the rest areas are of different depths.
  • the resting point for the rest position is the deepest and therefore the most difficult to overcome. A slight, unintentional tapping of the push button does not yet switch the engine on.
  • the rest point for the 2nd stage, ie for the overdrive, is the flattest and can be left quickly for the 1st stage when the pressure on the push button is released.
  • contacts of one switching position can be moved in the contact carrier relative to the contacts of the other switching position.
  • the push button is pressed, all contact pairs are moved to reach the first switch position, but only two contact pairs reach the corresponding contact connections, while the other contact pair only moves to the second switch position when the push button and the contact carrier are moved further is brought in, in which all contacts for the power supply are closed.
  • each contact pair is supported on one another by contact springs and guided in contact slots in the contact carrier in the direction of movement thereof.
  • the contacts rest on contact connections which are fixedly arranged in the switching element.
  • This biasing distance allows a partial relaxation of the contact spring during the displacement of the contact carrier in solution - the direction of the respective closed contact. This relaxation is necessary because when the contact carrier jumps over from one position to the other, the X contacts have to be suddenly released from the contact connections. A tensioned contact spring would prevent this or at least make it difficult.
  • the preload distance is greater than half the distance between the locking cams forming the locking points. The time of switching is thus always determined by the locking bodies when they jump from one resting point to the other and not by the springs, the strength of which can never be determined exactly and whose strength ratios do not change suddenly.
  • the force of the return spring of which several can be arranged next to one another and act together on the contact carrier, as well as the force of all contact springs and the force of the detent springs acting on the switching cams and inhibiting its movement in the relaxed state, are weaker than the force the preload spring when it is tensioned.
  • the contact springs are released and the return springs are tensioned.
  • the contact springs tension again, while the return springs always remain tensioned when switched on. Their relaxation is prevented by the detent springs and the final pressure of the pretensioning spring, which is reduced by the switching path of the contact carrier.
  • the prestressing spring is so little pretensioned at a weak pressure that, despite the support from the detent springs, it is weaker than the force of the return springs, which temporarily also tension the two opposing detent springs.
  • pressure feet between the push button and the contact carrier which limit the approach of these parts. They keep the contacts of the 1st switching stage of the switching element functional even when the biasing spring breaks or fatigues and inevitably cause the movement of the contact carrier.
  • the pressure feet are arranged on the push button and guided in grooves in a push button hole in a cover plate. This has limit stops for the pressure feet so that the push button is not pressed out of the switching element by the biasing spring. The limit stops always keep the pretension spring against the push button under a small pretension.
  • the contact carrier is guided in a base body of the switching element, in the screwed-on cover plate of which the push button is guided in a bore.
  • This separation enables easy assembly of the switching element with its built-in parts.
  • the contact connections and the contact carrier are inserted into the standing body and the pretension spring with the push button is placed on the contact carrier.
  • the cover plate with the hole is put over the push button and screwed to the base body.
  • the cover plate also holds U-profile pieces in guides of the base body for locking bodies pressed into the locking points by the locking springs.
  • Each U-profile piece has guide grooves on the inside of the flanges for pins of the latching body and for a thrust bearing present between the latter and the latching spring.
  • the profile piece also has a spring base with a pin for the detent spring at the end opposite the detent body.
  • the contact connections are inserted in the grooves of the base body.
  • the switching element has a base body 1 and a cover plate 2 screwed on with screws 3 at the four corners and having a bore 2a for a push button 4, which is supported by a biasing spring 5 on a contact carrier 7 guided in the base body 1.
  • the switching element is fastened by screws 3a in a switch housing, not shown.
  • the screws a '- d' of the upper contact connections a and c and the lower contact connections b and d can be seen.
  • the contact carrier 7 shown in FIGS. 2 and 3 is held in the rest position with its contacts A, B, C and D when the push button 4 is not pressed in by two return springs 6 which are arranged next to one another and are supported on the base 1a of the base body 1 .
  • the push button 4 has a spring bore 4a for receiving the biasing spring 5 and two pressure feet 4b which can be seen in FIGS. 2 and 6 and by means of which the contact carrier 7 is actuated when the biasing spring 5 breaks.
  • the opening direction of movement of the push button 4 is limited by the prestressing stops 4c of the pressure feet 4b which can be seen in FIG. 6 and which, when the push button 4 is not actuated, bear against the push button holders 2b of the cover plate 2.
  • four contacts A, B, C and D are slidably mounted in the contact carrier 7 in the direction of movement of the contact carrier until they come into contact with contact stops 7b.
  • Two opposing contacts A and B or C and D are guided in contact slots 7a and are pressed apart by a contact spring 8, the contact stops 7b of the contact carrier 7 and the contact connections a - d defining the end positions.
  • a biasing distance 13 Between the contact connections a and b and the contact stops 7b there is a biasing distance 13, which is compensated for by the contact spring 8.
  • contact springs 8 there are spring bores 7c in the contact carrier 7, two of which simultaneously serve as a guide receptacle for the return springs 6 resting on the spring base 7d.
  • the contact carrier 7 has gem. Fig. 3 under the push button 4 an actuating button 7e with a spring guide lug 7f for the biasing spring 5 and three latching cams 7g one above the other on two opposite sides for two switching positions. Between the locking cams 7g and under the lower locking cams there are locking points of different depths for cylindrical locking bodies 10, which are always pressed into the locking points by locking springs 9 via intermediate pressure bearings 12. Each locking body 10 is guided with the thrust bearing 12 perpendicular to the contact carrier 7 in grooves 11 a of a U-shaped profile piece 11 shown in FIG. 7, on the spring base 11 b of which the locking spring 9 guided on a pin 11 c is supported. The profile piece 11 rests with the spring base 11b against an undetectable stop of the base body 1 and is secured against jumping up by the cover plate 2.
  • Figure 3 shows the switching element with its contacts in the off position according to the section X-X of Figure 1.
  • the off contacts A and C are under the action of the contact springs 8 at the contact terminals a and c, while the contacts B and D are contactless.
  • the bias spring 5 and the return springs 6 are relaxed.
  • the locking body 10 are in the lower locking point.
  • Figure 4 shows the switching element in the 1st switching stage.
  • the contact C was opened by moving the contact carrier 7 from its contact stop 7b.
  • Contact A is still under the action of its relaxed contact spring 8 at contact terminal a.
  • Contact B is at contact terminal b and is therefore closed.
  • the return springs 6 are slightly panned.
  • the locking body 10 lie in the middle locking point.
  • Figure 5 shows the switching element in the second switching stage with open contacts A and C and closed contacts B and D.
  • the return springs 6 and the contact springs 8 are strongly tensioned.
  • the locking body 10 are in the upper locking point.
  • the bias spring 5 is tensioned only when initiating the switching process. It relaxes again when the locking cams 7g have pushed the locking bodies 10 back against the pressure of the locking springs 9 and the locking bodies 10 reach the desired locking position.
  • the contact springs 8 and return springs 6 are so strong that they compress the biasing spring 5 when the pressure on the push button 4 decreases and also overcome the pressure of the detent springs 9 and thus gradually push the contacts AD back into the switch-off positions.
  • Figure 8 shows the switching path S and the switching force F with the displacement-force curves Y for switching on and Z for switching off the motor in the diagram.
  • the switching points can be recognized by a sudden change in the switching force F and lie in the unstable range of the actuation path.

Landscapes

  • Push-Button Switches (AREA)
  • Electronic Switches (AREA)
EP79100425A 1978-04-10 1979-02-13 Elément interrupteur avec des positions d'arrêt Expired EP0004544B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2815493 1978-04-10
DE2815493A DE2815493C3 (de) 1978-04-10 1978-04-10 Schaltelement

Publications (3)

Publication Number Publication Date
EP0004544A2 true EP0004544A2 (fr) 1979-10-17
EP0004544A3 EP0004544A3 (en) 1979-10-31
EP0004544B1 EP0004544B1 (fr) 1981-09-16

Family

ID=6036639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79100425A Expired EP0004544B1 (fr) 1978-04-10 1979-02-13 Elément interrupteur avec des positions d'arrêt

Country Status (7)

Country Link
US (1) US4233479A (fr)
EP (1) EP0004544B1 (fr)
AT (1) AT377119B (fr)
DE (1) DE2815493C3 (fr)
DK (1) DK147079A (fr)
ES (1) ES479394A1 (fr)
NO (1) NO148796C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154797A (en) * 1984-01-16 1985-09-11 Lre Relays & Electronics Push button switches
EP0216962A1 (fr) * 1985-07-26 1987-04-08 LRE RELAYS & ELECTRONICS LIMITED Commutateurs
DE3608569A1 (de) * 1986-03-14 1987-09-17 Bbc Brown Boveri & Cie Betaetigungselement mit einem betaetigungsstoessel fuer explosionsgeschuetztes elektrisches schaltgeraet
EP2192604B1 (fr) * 2008-11-28 2017-10-25 Thales Dispositif d'entrée de données à sensation tactile améliorée

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4404445A (en) * 1982-07-30 1983-09-13 Allen-Bradley Company Pushbutton switch operator assembly
DE3641243A1 (de) * 1986-12-03 1988-06-09 Vdo Schindling Elektrischer sollwertgeber, insbesondere fuer eine elektronische gaspedal-anlage
US5213205A (en) * 1988-08-11 1993-05-25 Pittway Corporation Switch enclosure
GB0020983D0 (en) * 2000-08-26 2000-10-11 Honeywell Control Syst Limit switch
US6774509B2 (en) * 2002-01-30 2004-08-10 Defond Manufacturing Limited Electrical switch assembly
US7211758B2 (en) * 2005-07-12 2007-05-01 Defond Components Limited Circuit interrupter that produces snap-action connection and disconnection between electrical contacts

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1115515A (fr) * 1954-12-14 1956-04-25 App Et D Expl Des Etablissemen Dispositif mécanique de positionnement angulaire
FR1372234A (fr) * 1963-04-09 1964-09-11 Sachsenwerk Licht & Kraft Ag Commande à ressort pour appareils électriques de commutation
DE1277982B (de) * 1966-07-27 1968-09-19 Demag Zug Gmbh Taster oder Tastschalter mit wenigstens zwei einrastbaren Schaltstufen
DE2124537A1 (de) * 1971-05-18 1972-11-30 Kenk Geb Wirth I Elektrischer Stufenschalter für Beleuchtungskörper
FR2341190A1 (fr) * 1976-02-11 1977-09-09 Euratom Commutateur electrique

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1158955A (en) * 1914-11-19 1915-11-02 Apple Electric Company Switch.
US2347874A (en) * 1942-09-07 1944-05-02 Gen Motors Corp Electric switch
US2386162A (en) * 1942-10-17 1945-10-02 Robert Hetherington & Son Inc Single throw hill and valley switch
US2814681A (en) * 1954-04-05 1957-11-26 Furnas Electric Co Electric switch assemblage
CA1008116A (en) * 1973-04-18 1977-04-05 William H. Hayward Contact unit for attachment to an electromagnetically operated switch
US4029916A (en) * 1975-04-18 1977-06-14 Northern Electric Company Limited Multi-contact push-button switch and plural embodiment for keyboard switch assembly
US4154996A (en) * 1977-05-12 1979-05-15 Mcgraw-Edison Company Positive break snap action switch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1115515A (fr) * 1954-12-14 1956-04-25 App Et D Expl Des Etablissemen Dispositif mécanique de positionnement angulaire
FR1372234A (fr) * 1963-04-09 1964-09-11 Sachsenwerk Licht & Kraft Ag Commande à ressort pour appareils électriques de commutation
DE1277982B (de) * 1966-07-27 1968-09-19 Demag Zug Gmbh Taster oder Tastschalter mit wenigstens zwei einrastbaren Schaltstufen
DE2124537A1 (de) * 1971-05-18 1972-11-30 Kenk Geb Wirth I Elektrischer Stufenschalter für Beleuchtungskörper
FR2341190A1 (fr) * 1976-02-11 1977-09-09 Euratom Commutateur electrique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154797A (en) * 1984-01-16 1985-09-11 Lre Relays & Electronics Push button switches
EP0216962A1 (fr) * 1985-07-26 1987-04-08 LRE RELAYS & ELECTRONICS LIMITED Commutateurs
DE3608569A1 (de) * 1986-03-14 1987-09-17 Bbc Brown Boveri & Cie Betaetigungselement mit einem betaetigungsstoessel fuer explosionsgeschuetztes elektrisches schaltgeraet
EP2192604B1 (fr) * 2008-11-28 2017-10-25 Thales Dispositif d'entrée de données à sensation tactile améliorée

Also Published As

Publication number Publication date
NO148796B (no) 1983-09-05
US4233479A (en) 1980-11-11
ATA262779A (de) 1984-06-15
DK147079A (da) 1979-10-11
EP0004544B1 (fr) 1981-09-16
DE2815493A1 (de) 1979-10-18
DE2815493B2 (de) 1980-05-08
AT377119B (de) 1985-02-11
EP0004544A3 (en) 1979-10-31
DE2815493C3 (de) 1981-01-22
ES479394A1 (es) 1980-01-01
NO791189L (no) 1979-10-11
NO148796C (no) 1983-12-14

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