EP0490114A2 - Door safety switch for a micro-wave driven oven - Google Patents

Door safety switch for a micro-wave driven oven Download PDF

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Publication number
EP0490114A2
EP0490114A2 EP19910119438 EP91119438A EP0490114A2 EP 0490114 A2 EP0490114 A2 EP 0490114A2 EP 19910119438 EP19910119438 EP 19910119438 EP 91119438 A EP91119438 A EP 91119438A EP 0490114 A2 EP0490114 A2 EP 0490114A2
Authority
EP
European Patent Office
Prior art keywords
safety switch
door safety
plunger
switching
door
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
EP19910119438
Other languages
German (de)
French (fr)
Other versions
EP0490114A3 (en
EP0490114B1 (en
Inventor
Kurt Lintner
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.)
BOSCH-SIEMENS HAUSGERAETE GMBH
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0490114A2 publication Critical patent/EP0490114A2/en
Publication of EP0490114A3 publication Critical patent/EP0490114A3/en
Application granted granted Critical
Publication of EP0490114B1 publication Critical patent/EP0490114B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6414—Aspects relating to the door of the microwave heating apparatus
    • H05B6/6417—Door interlocks of the microwave heating apparatus and related circuits

Definitions

  • the invention relates to a door safety switch for a stove which can be operated with microwave energy, with an electrical switching element which can be actuated by a switching plunger connected to the door.
  • door safety switches are provided which can be actuated by a switching tappet via a pivoting rocker switch when the oven door is closed and which interrupt the working circuit for the microwave generator when the door is open.
  • the switching element for example a microswitch
  • the rocker switch are separately mounted on a side wall of the furnace muffle. Due to manufacturing tolerances, the geometrical arrangement of the switching plunger, rocker switch and switching element requires an exact adaptation or adjustment thereof on the finished device. Such an arrangement has become known from DE-GM 85 21 661.5.
  • the invention has for its object to improve the construction of the door safety switch in terms of its accuracy and ease of installation.
  • This object is achieved according to the invention in that the switching element, a plunger with molded switching cam, a spindle and a sliding guide are arranged on an element holder made of plastic.
  • the drawing shows all essential parts of the safety switch, which are located as a structural unit on their own plastic carrier. According to the figure, an element holder 1, a plunger 2, a switching cam 3, a spindle 4, an adjusting element 5, a switching element 6, an actuator 7 fastened to the door and a sliding guide 8 can be seen.
  • the supporting part of the safety switch is an element pick-up 1 made of insulating plastic.
  • the switching element 6 is fastened in the element holder 1 by means of snap hooks. If the door is closed, the spindle 4 with the tappet 2 attached to it is moved in accordance with the previously adjusted stroke via the actuator 7 attached to the door. The actuator 7 slides through the opening the sliding guide 8 to the spindle 4.
  • the switching element 6, a microswitch is actuated via the cam 3 formed on the plunger 2.
  • the solution according to the invention also has the advantage that the stroke of the plunger 2 can be precisely adjusted on the spindle 4 with the aid of the adjusting element 5 without the screw connection of the complete switch unit having to be loosened.
  • the adjusting element 5 allows an exact adjustment of the plunger 2 by means of a screw slot.
  • the spindle 4 and the plunger 2 made of plastic are positively connected.
  • the positive connection is formed by a receiving thread embossed into the plastic, which cuts the spindle 4 in the plunger 2. Due to this self-formed thread in the plunger, no additional securing means, such as securing lacquer, for example, is required to secure the adjustment screw or the switch unit after the adjustment.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Push-Button Switches (AREA)

Abstract

The invention relates to a door safety switch for a microwave- driven oven, with an electric switching element which can be actuated by a switching plunger connected to the door. This aim is achieved by arranging on an element receptacle made of plastic the switching element, a plunger with switching cam formed on, a spindle and a slide guide. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Türsicherheitsschalter für einen mit Mikrowellenenergie betreibbaren Herd, mit einem durch einen mit der Tür verbundenen Schaltstößel betätigbaren elektrischen Schaltelement.The invention relates to a door safety switch for a stove which can be operated with microwave energy, with an electrical switching element which can be actuated by a switching plunger connected to the door.

Bei Mikrowellenherden, insbesondere bei solchen mit zusätzlichen Widerstands-Heizelementen, sind Türsicherheitsschalter vorgesehen, die beim Schließen der Ofentür durch einen Schaltstößel über eine schwenkbar gelagerte Schaltwippe betätigbar sind und die bei geöffneter Tür den Arbeitsstromkreis für den Mikrowellengenerator unterbrechen. Hierbei ist das Schaltelement, z.B. ein Mikroschalter, sowie die Schaltwippe an einer Seitenwand der Ofenmuffel separat montiert. Aufgrund von Fertigungstoleranzen bedarf es hierbei bezüglich der geometrischen Anordnung von Schaltstößel, Schaltwippe und Schaltelement einer exakten Anpassung bzw. Justierung derselben am fertigen Gerät. Eine solche Anordnung ist durch das DE-GM 85 21 661.5 bekanntgeworden.In microwave ovens, in particular those with additional resistance heating elements, door safety switches are provided which can be actuated by a switching tappet via a pivoting rocker switch when the oven door is closed and which interrupt the working circuit for the microwave generator when the door is open. Here, the switching element, for example a microswitch, and the rocker switch are separately mounted on a side wall of the furnace muffle. Due to manufacturing tolerances, the geometrical arrangement of the switching plunger, rocker switch and switching element requires an exact adaptation or adjustment thereof on the finished device. Such an arrangement has become known from DE-GM 85 21 661.5.

Der Erfindung liegt die Aufgabe zugrunde, die Konstruktion des Türsicherheitsschalters im Hinblick auf dessen Funktionsgenauigkeit und Montierbarkeit zu verbessern. Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß auf einer aus Kunststoff bestehenden Elementenaufnahme das Schaltelement, ein Stößel mit angeformter Schaltnocke eine Spindel und eine Schiebeführung angeordnet ist.The invention has for its object to improve the construction of the door safety switch in terms of its accuracy and ease of installation. This object is achieved according to the invention in that the switching element, a plunger with molded switching cam, a spindle and a sliding guide are arranged on an element holder made of plastic.

Weitere vorteilhafte Einzelheiten der Erfindung ergeben sich aus dem in der Zeichnung dargestellten und nachstehend beschriebenen Ausführungsbeispiel.Further advantageous details of the invention result from the exemplary embodiment shown in the drawing and described below.

Die Zeichnung zeigt alle wesentlichen Teile des Sicherheitsschalters, die sich als konstruktive Einheit auf einem eigenen Kunststoffträger befinden. Gemäß der Figur ist eine Elementaufnahme 1, ein Stößel 2, eine Schaltnocke 3, eine Spindel 4, ein Justierelement 5, ein Schaltelement 6, ein an der Tür befestigter Betätiger 7 und eine Schiebeführung 8 erkennbar.The drawing shows all essential parts of the safety switch, which are located as a structural unit on their own plastic carrier. According to the figure, an element holder 1, a plunger 2, a switching cam 3, a spindle 4, an adjusting element 5, a switching element 6, an actuator 7 fastened to the door and a sliding guide 8 can be seen.

Tragender Teil des Sicherheitsschalters ist ein aus Isolierkunststoff bestehender Elementenaufnehmer 1. Auf dem Elementaufnehmer 1 befindet sich ein Stößel 2 mit vormontierter Spindel 4 und eine Schiebeführung 8, die ein unsachgemäßes Schalten des Schaltelementes 6 verhindert. Das Schaltelement 6 ist mittels Schnapphaken in der Elementaufnahme 1 befestigt. Wird die Tür geschlossen, so wird über den an der Tür befestigten Betätiger 7 die Spindel 4 mit dem daran befestigten Stößel 2 entsprechend des zuvor justierten Hubes verschoben. Dabei gleitet der Betätiger 7 durch die Öffnung der Schiebeführung 8 zur Spindel 4. Über die an dem Stößel 2 angeformte Nocke 3 wird das Schaltelement 6, ein Mikroschalter, betätigt.The supporting part of the safety switch is an element pick-up 1 made of insulating plastic. On the element pick-up 1 there is a plunger 2 with a pre-assembled spindle 4 and a sliding guide 8, which prevents the switching element 6 from switching improperly. The switching element 6 is fastened in the element holder 1 by means of snap hooks. If the door is closed, the spindle 4 with the tappet 2 attached to it is moved in accordance with the previously adjusted stroke via the actuator 7 attached to the door. The actuator 7 slides through the opening the sliding guide 8 to the spindle 4. The switching element 6, a microswitch, is actuated via the cam 3 formed on the plunger 2.

Die erfindungsgemäße Lösung bietet weiterhin den Vorteil, daß an der Spindel 4 mit Hilfe des Justierelementes 5 der Hub des Stößels 2 exakt justiert werden kann, ohne daß die Verschraubung der kompletten Schaltereinheit gelöst werden muß. Das Justiertelement 5 erlaubt eine exakte Justierung des Stößels 2 durch einen Schraubenschlitz. Die Spindel 4 und der aus Kunststoff bestehende Stößel 2 sind formschlüssig verbunden. Der Formschluß wird durch ein in den Kunststoff eingeprägtes Aufnahmegewinde, das die Spindel 4 in den Stößel 2 schneidet, gebildet. Durch dieses selbstgeformte Gewinde im Stößel ist zudem kein weiteres Sicherungsmittel, wie Sicherungslack beispielsweise, erforderlich, um nach der Justierung die Justageschraube bzw. die Schaltereinheit zu sichern.The solution according to the invention also has the advantage that the stroke of the plunger 2 can be precisely adjusted on the spindle 4 with the aid of the adjusting element 5 without the screw connection of the complete switch unit having to be loosened. The adjusting element 5 allows an exact adjustment of the plunger 2 by means of a screw slot. The spindle 4 and the plunger 2 made of plastic are positively connected. The positive connection is formed by a receiving thread embossed into the plastic, which cuts the spindle 4 in the plunger 2. Due to this self-formed thread in the plunger, no additional securing means, such as securing lacquer, for example, is required to secure the adjustment screw or the switch unit after the adjustment.

Claims (6)

Türsicherheitsschalter für einen mit Mikrowellenenergie betreibbaren Herd, mit einer durch einen mit der Tür verbundenen Schaltstößel betätigbaren elektrischen Schaltelement, dadurch gekennzeichnet, daß auf einer aus Kunststoff bestehenden Elementenaufnahme (1) das Schaltelement (6), ein Stößel (2) mit angeformter Schaltnocke (3), eine Spindel (4) und eine Schiebeführung (3) angeordnet ist.Door safety switch for a stove which can be operated with microwave energy, with an electrical switching element which can be actuated by a switching plunger connected to the door, characterized in that the switching element (6), a plunger (2) with a molded switching cam (3 ), a spindle (4) and a sliding guide (3) is arranged. Türsicherheitsschalter nach Anspruch 1, dadurch gekennzeichnet, daß die Elementenaufnahme (1) eine Schalteraufnahme aufweist, in der das Schaltelement (6) mittels Schnapphaken befestigt ist.Door safety switch according to claim 1, characterized in that the element holder (1) has a switch holder in which the switching element (6) is fastened by means of snap hooks. Türsicherheitsschalter nach Anspruch 1, dadurch gekennzeichnet, daß die Spindel (4) mit einem Justierelement (5) verbunden ist.Door safety switch according to claim 1, characterized in that the spindle (4) is connected to an adjusting element (5). Türsicherheitsschalter nach Anspruch 1 und 3, dadurch gekennzeichnet, daß zur exakten Hubjustierung des Stößels (2) das Justiertelement (5) einen Schraubenschlitz aufweist.Door safety switch according to Claims 1 and 3, characterized in that the adjusting element (5) has a screw slot for exact stroke adjustment of the plunger (2). Türsicherheitsschalter nach Anspruch 1, dadurch gekennzeichnet, daß die Spindel (4) mit dem aus Kunststoff bestehenden Stößel (2) formschlüssig verbunden ist.Door safety switch according to claim 1, characterized in that the spindle (4) is positively connected to the plunger (2) made of plastic. Türsicherheitsschalter nach Anspruch 1, dadurch gekennzeichnet, daß die Schaltnocke (3) das als Mikroschalter ausgebildete Schaltelement (6) betätigt.Door safety switch according to claim 1, characterized in that the switching cam (3) actuates the switching element (6) designed as a microswitch.
EP91119438A 1990-12-14 1991-11-14 Door safety switch for a micro-wave driven oven Expired - Lifetime EP0490114B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9016927U 1990-12-14
DE9016927U DE9016927U1 (en) 1990-12-14 1990-12-14

Publications (3)

Publication Number Publication Date
EP0490114A2 true EP0490114A2 (en) 1992-06-17
EP0490114A3 EP0490114A3 (en) 1992-11-19
EP0490114B1 EP0490114B1 (en) 1995-08-30

Family

ID=6860287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119438A Expired - Lifetime EP0490114B1 (en) 1990-12-14 1991-11-14 Door safety switch for a micro-wave driven oven

Country Status (3)

Country Link
EP (1) EP0490114B1 (en)
DE (2) DE9016927U1 (en)
ES (1) ES2078414T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014217640A1 (en) 2014-09-03 2016-03-03 BSH Hausgeräte GmbH Method for mounting a switch unit and microwave cooking appliance

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19846862B4 (en) * 1998-10-12 2010-10-28 BSH Bosch und Siemens Hausgeräte GmbH Cooking device for high temperature and / or microwave operation with door locking device
DE19927249A1 (en) * 1999-06-15 2000-12-21 Bsh Bosch Siemens Hausgeraete Door switch for cooking apparatus such as oven has adjustment screw aligned perpendicular to switch rod to allow easy access

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4201901A (en) * 1978-03-20 1980-05-06 Amana Refrigeration, Inc. Adjustable safety interlock for microwave ovens
JPS5757495A (en) * 1980-09-22 1982-04-06 Matsushita Electric Ind Co Ltd High frequency heater
DE8521661U1 (en) * 1985-07-26 1985-09-12 Bosch-Siemens Hausgeräte GmbH, 8000 München Door safety switch for a stove
US4717794A (en) * 1986-08-01 1988-01-05 Tricon Industries, Incorporated Interlock switch
AU595424B2 (en) * 1987-02-13 1990-03-29 Maxwell Gervaise Maxwell Improvements to microwave ovens

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014217640A1 (en) 2014-09-03 2016-03-03 BSH Hausgeräte GmbH Method for mounting a switch unit and microwave cooking appliance

Also Published As

Publication number Publication date
ES2078414T3 (en) 1995-12-16
EP0490114A3 (en) 1992-11-19
DE59106371D1 (en) 1995-10-05
DE9016927U1 (en) 1991-03-07
EP0490114B1 (en) 1995-08-30

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