EP0013992B1 - Operating device for electrical or pneumatic switch - Google Patents

Operating device for electrical or pneumatic switch Download PDF

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Publication number
EP0013992B1
EP0013992B1 EP80100378A EP80100378A EP0013992B1 EP 0013992 B1 EP0013992 B1 EP 0013992B1 EP 80100378 A EP80100378 A EP 80100378A EP 80100378 A EP80100378 A EP 80100378A EP 0013992 B1 EP0013992 B1 EP 0013992B1
Authority
EP
European Patent Office
Prior art keywords
operating device
spring
electrical
leg
biased
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
Application number
EP80100378A
Other languages
German (de)
French (fr)
Other versions
EP0013992A1 (en
Inventor
Hendrikus Berkhof
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.)
Honeywell BV
Original Assignee
Honeywell BV
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 Honeywell BV filed Critical Honeywell BV
Publication of EP0013992A1 publication Critical patent/EP0013992A1/en
Application granted granted Critical
Publication of EP0013992B1 publication Critical patent/EP0013992B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs

Definitions

  • the invention relates to an actuating device according to the first part of claim 1.
  • Such an actuating device is known from DE-B-12 06 685.
  • the leaf spring carries a double closing body at its free end, which works together with two valve seats facing each other.
  • electrical snap switches are known in which the leaf spring carries at its free end a contact which is opposite a fixed counter contact.
  • the object of the invention is to provide an actuating device which can be used both for electrical and for pneumatic switching elements and which can exert higher actuating forces than the known actuating device mentioned at the outset without additional equipment.
  • This object is achieved by the invention characterized in claim 1.
  • it is not the leaf spring that is used here, but rather the dead center spring that serves as part of it and causes the snap movement to generate the actuating force.
  • greater actuation forces can be applied using the known snap spring elements produced in large numbers and thus reliably actuate both electrical and pneumatic switching elements.
  • Advantageous developments of the invention result from the subclaims.
  • a leaf spring 2 is clamped on one side, for example with its fastening end 3 riveted to a housing shoulder 5 with the aid of a rivet 4.
  • the middle leg 6 is shortened and inserted under pretension in a notch 7 of a bracket 8 also held on the housing shoulder 5 by means of the rivet 4.
  • This arcuately curved dead center spring stands opposite the switching element to be actuated, which in the present case is a two-armed rocker 9 which carries a closing body 12 and 13 on each of the two lever arms 10 and 11.
  • the two closing bodies each face a valve seat 14 or 15 and thus either close one or the other passage.
  • the leaf spring 2 rests with its free end on the bracket 8, which determines its upper limit position.
  • the actuating slide 16 guided in two lateral rails 23 presses the side legs 24 of the leaf spring 2 down and this passes through the dead center position, it suddenly jumps down, driven by the force of the middle leg 6 of the dead center spring rocker 9 pivotable about a housing-fixed axis 19, so that valve 13, 15 is now closed and the other valve 12, 14 is opened.
  • a contact 20 provided at the free end 17 of the leaf spring 2 remains unused in the present application. However, it can cooperate with a mating contact provided on a housing shoulder 21 or can be replaced by a rubber stopper to dampen the switching movement.

Description

Die Erfindung betrifft eine Betätigungseinrichtung gemäss dem ersten Teil des Anspruchs 1. Eine solche Betätigungseinrichtung ist aus der DE-B-12 06 685 bekannt. Die Blattfeder trägt hier an ihrem freien Ende einen Doppelschliesskörper, der mit zwei sich gegenüberstehenden Ventilsitzen zusammenarbeitet. Weiterhin sind elektrische Schnappschalter bekannt, bei denen die Blattfeder an ihrem freien Ende einen Kontakt trägt, welcher einem ortsfesten Gegenkontakt gegenübersteht.The invention relates to an actuating device according to the first part of claim 1. Such an actuating device is known from DE-B-12 06 685. The leaf spring carries a double closing body at its free end, which works together with two valve seats facing each other. Furthermore, electrical snap switches are known in which the leaf spring carries at its free end a contact which is opposite a fixed counter contact.

Aufgabe der Erfindung ist es, eine sowohl für elektrische als auch für pneumatische Schaltglieder verwendbare Betätigungseinrichtung zu schaffen, welche ohne zusätzlichen gerätemässigen Aufwand höhere Betätigungskräfte als die eingangs erwähnte bekannte Betätigungseinrichtung aufzubringen vermag. Diese Aufgabe wird gelöst durch die im Anspruch 1 gekennzeichnete Erfindung. Abweichend vom Stand der Technik wird hier nicht die Blattfeder, sondern die als Teil derselben dienende und die Schnappbewegung hervorrufende Totpunktfeder zur Erzeugung der Betätigungskraft verwendet. Hierdurch kann man unter Verwendung der bekannten in grossen Stückzahlen hergestellten Schnappfederelemente grössere Betätigungskräfte aufbringen und damit sowohl elektrische als auch pneumatische Schaltglieder zuverlässig betätigen. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.The object of the invention is to provide an actuating device which can be used both for electrical and for pneumatic switching elements and which can exert higher actuating forces than the known actuating device mentioned at the outset without additional equipment. This object is achieved by the invention characterized in claim 1. In a departure from the prior art, it is not the leaf spring that is used here, but rather the dead center spring that serves as part of it and causes the snap movement to generate the actuating force. As a result, greater actuation forces can be applied using the known snap spring elements produced in large numbers and thus reliably actuate both electrical and pneumatic switching elements. Advantageous developments of the invention result from the subclaims.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung wiedergegebenen Ausführungsbeispiels erläutert. Dabei zeigt

  • Fig. 1 einen Schnitt durch eine solche Betätigungseinrichtung parallel zur Blattfeder und
  • Fig. 2 einen hierzu orthogonalen Schnitt in Höhe der Schnittlinie II-II.
The invention is explained below using an exemplary embodiment shown in the drawing. It shows
  • Fig. 1 shows a section through such an actuator parallel to the leaf spring and
  • Fig. 2 is an orthogonal section at the line II-II.

In einem Gehäuse 1 ist einseitig eine Blattfeder 2 eingespannt, beispielsweise mit ihrem Befestigungsende 3 mit Hilfe eines Niets 4 an einem Gehäuseabsatz 5 angenietet. Es handelt sich um eine dreischenklige Blattfeder bekannter Bauform, deren Mittelschenkel 6 verkürzt und unter Vorspannung in eine Kerbe 7 eines ebenfalls am Gehäuseabsatz 5 mittels des Niets 4 gehaltenen Haltebügels 8 eingesetzt ist. Diese bogenförmig gewölbte Totpunktfeder steht dem zu betätigenden Schaltglied gegenüber, welches im vorliegenden Fall eine zweiarmige Wippe 9 ist, die an beiden Hebelarmen 10 und 11 je einen Schliesskörper 12 bzw. 13 trägt. Die beiden Schliesskörper stehen je einem Ventilsitz 14 bzw. 15 gegenüber und verschliessen somit entweder den einen oder den anderen Durchlass.In a housing 1, a leaf spring 2 is clamped on one side, for example with its fastening end 3 riveted to a housing shoulder 5 with the aid of a rivet 4. It is a three-leg leaf spring of known design, the middle leg 6 is shortened and inserted under pretension in a notch 7 of a bracket 8 also held on the housing shoulder 5 by means of the rivet 4. This arcuately curved dead center spring stands opposite the switching element to be actuated, which in the present case is a two-armed rocker 9 which carries a closing body 12 and 13 on each of the two lever arms 10 and 11. The two closing bodies each face a valve seat 14 or 15 and thus either close one or the other passage.

In der gezeigten Ruhestellung liegt die Blattfeder 2 mit ihrem freien Ende am Haltebügel 8 an, der ihre obere Grenzlage bestimmt. Sobald der in zwei seitlichen Schienen 23 geführte Betätigungsschieber 16 die Seitenschenkel 24 der Blattfeder 2 nach unten drückt und diese die Totpunktlage durchläuft, springt sie, angetrieben durch die Kraft des Mittelschenkels 6 der Totpunktfeder schlagartig nach unten um Dabei betätigt die Totpunktfeder über einen Ansatz 18 die um eine gehäusefeste Achse 19 schwenkbare Wippe 9, so dass nunmehr das Ventil 13, 15 geschlossen und das andere Ventil 12, 14 geöffnet wird. Ein am freien Ende 17 der Blattfeder 2 vorgesehener Kontakt 20 bleibt im vorliegenden Anwendungsfall ungenutzt. Er kann jedoch mit einem auf einem Gehäuseabsatz 21 vorgesehenen Gegenkontakt zusammenarbeiten oder zur Dämpfung der Schaltbewegung durch einen Gummistopfen ersetzt sein.In the rest position shown, the leaf spring 2 rests with its free end on the bracket 8, which determines its upper limit position. As soon as the actuating slide 16 guided in two lateral rails 23 presses the side legs 24 of the leaf spring 2 down and this passes through the dead center position, it suddenly jumps down, driven by the force of the middle leg 6 of the dead center spring rocker 9 pivotable about a housing-fixed axis 19, so that valve 13, 15 is now closed and the other valve 12, 14 is opened. A contact 20 provided at the free end 17 of the leaf spring 2 remains unused in the present application. However, it can cooperate with a mating contact provided on a housing shoulder 21 or can be replaced by a rubber stopper to dampen the switching movement.

Sobald ein auf den Betätigungsschieber 16 einwirkender Stössel, z.B. eines Temperaturfühlers, wieder nach oben geht, springt nach dem Durchlaufen der Totpunktlage die Blattfeder nach oben, wobei unter der Kraft einer Rückstellfeder 22 die Wippe 9 in die aus der Zeichnung ersichtliche Ausgangsstellung umschnappt.As soon as a plunger acting on the operating slide 16, e.g. a temperature sensor, again goes up, the leaf spring jumps up after passing through the dead center position, the rocker 9 snapping into the starting position shown in the drawing under the force of a return spring 22.

Claims (3)

1. Snap-acting operating device for electrical or pneumatic switch comprising a spring blade (2) stationarily mounted on its one end and exposed to the operating force (16), said spring blade having at least one leg (6) formed as a pre-biased dead centre spring for effecting the snap action, characterized in that the pre-biased leg is located opposite the switch member (9) and the switching force is directly transmitted from said leg (6) to the switch member (9).
2. Operating device according to claim 1, characterized in that the switch member (9) is a spring-biased (22) tiltable lever, which carries at least one preferably resilient closure member (12, 13) positioned opposite of a stationary valve seat (14, 15).
3. Operating device according to claim 1, characterized in that the switch member (9) is a see-saw tiltable about a stationary axis (19) and carrying one closure member (12, 13) each on its two lever arms (10, 11).
EP80100378A 1979-01-27 1980-01-25 Operating device for electrical or pneumatic switch Expired EP0013992B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792903188 DE2903188A1 (en) 1979-01-27 1979-01-27 ACTUATING DEVICE FOR ELECTRICAL OR PNEUMATIC SWITCHING LINKS
DE2903188 1979-01-27

Publications (2)

Publication Number Publication Date
EP0013992A1 EP0013992A1 (en) 1980-08-06
EP0013992B1 true EP0013992B1 (en) 1982-02-10

Family

ID=6061557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100378A Expired EP0013992B1 (en) 1979-01-27 1980-01-25 Operating device for electrical or pneumatic switch

Country Status (2)

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EP (1) EP0013992B1 (en)
DE (2) DE2903188A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5276168A (en) * 1990-06-18 1994-01-04 E. R. Squibb & Sons, Inc. Benzopyran derivatives and heterocyclic analogs thereof as antiischemic agents

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE505449A (en) * 1951-02-27
US3018345A (en) * 1960-12-15 1962-01-23 Honeywell Regulator Co Switch apparatus
DE1206685B (en) * 1961-05-03 1965-12-09 American Sterilizer Co Control or multi-way valve with snap action
JPS4625219B1 (en) * 1965-02-24 1971-07-20
US3353559A (en) * 1965-05-18 1967-11-21 Robertshaw Controls Co Snap acting pneumatic diverting relay
US3471663A (en) * 1967-05-16 1969-10-07 F & F Enterprises Inc String-operated switch construction
DE2062801A1 (en) * 1970-12-19 1972-06-29 Kissling Gmbh Switch for controlling gaseous flows

Also Published As

Publication number Publication date
EP0013992A1 (en) 1980-08-06
DE3060183D1 (en) 1982-03-18
DE2903188A1 (en) 1980-07-31

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