EP0908911B1 - Ein wärmebetätigter Schalter mit einer Kombinationskomponente - Google Patents

Ein wärmebetätigter Schalter mit einer Kombinationskomponente Download PDF

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Publication number
EP0908911B1
EP0908911B1 EP19980500214 EP98500214A EP0908911B1 EP 0908911 B1 EP0908911 B1 EP 0908911B1 EP 19980500214 EP19980500214 EP 19980500214 EP 98500214 A EP98500214 A EP 98500214A EP 0908911 B1 EP0908911 B1 EP 0908911B1
Authority
EP
European Patent Office
Prior art keywords
adjustment pin
base body
combination component
switching device
component
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
EP19980500214
Other languages
English (en)
French (fr)
Other versions
EP0908911A1 (de
Inventor
Ramon Azpeitia De Diego
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.)
Fagor Electrodomesticos SCL
Original Assignee
Fagor Electrodomesticos SCL
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 Fagor Electrodomesticos SCL filed Critical Fagor Electrodomesticos SCL
Publication of EP0908911A1 publication Critical patent/EP0908911A1/de
Application granted granted Critical
Publication of EP0908911B1 publication Critical patent/EP0908911B1/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
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure

Definitions

  • the present invention relates to a thermally actuated switching device, comprising a base body, an electrical switch, means for actuating the switch as a function of a heat responsive device, and means for adjustment the switching threshold of the switch, according to the preamble of claim 1.
  • the means for adjustment comprises a setting spindle interacting, via the diaphragm, with an actuating arm for the switch operation.
  • US-3,943,479 discloses a switching device with a setting spindle provided with a drive plate secured to the spindle for rotation herewith, and a unrotatable disk-like spring to provide the frictional resistance to the rotation of the spindle.
  • the indication of the rotational position of the spindle is effected through a separated cam engaging with the drive plate.
  • US-4,274,546 discloses a switching device with an adjustment screw which is provided with a rotatable cradle-like or "U"-shaped member, for the only purpose of centering the diaphragm relative to the spindle axis.
  • the cradle-like member has a pair of upwardly directed arms, each provided with an outwardly turned end, the later provided with a rounded embossment, serving only to the purpose of centering the cradle-like member relative to the actuating lever arm.
  • US-4,214,224 discloses a switching device in accordance with the preamble of claim 1, whose setting spindle is provided with a fixed annular member, made of resilient material with provides only a second rotation stop tab to the stop lug element fitted onto the setting spindle. A first stop tab is provided by the cover of the switching device. The combination of the stop lug element and the annular member only serves to the purpose of the angular displacement between two end positions. No frictional resistance is provided by such combination of elements.
  • the switching devices according to the prior art comprise a large number of separate component which are coupled to a base body.
  • the base body is made from a non-resilient material.
  • the friction means comprise the adjustment pin or a rigid component coupled thereto, which interacts with another resilient component coupled to the base body. This means that a separated resilient component is always need coupled to the base body.
  • the clicking action is obtained by allowing a resilient component on the base body to interact with one rigid component on the adjustment pin. Therefore, for this purpose, at least two components are necessary and have to be attached separately.
  • the object of the invention is a thermally actuated switching device with a combination component as is defined in claim 1.
  • the switching device provides a friction element, which is itself resilient, and interacts with part of the base body itself, thus allowing one component to be dispensed with.
  • the switching device comprises a calibration nut fixed to the base body, which guides the advance of the rotatable adjustment pin or setting spindle of the switch. A rotational friction of said element belonging to the combination component against the fixed nut is created, to cause a necessary force couple for rotating the adjustment pin.
  • the adjustment pin is provided with a co-rotating clicking component with a resilient projection, which is able to interact with one substantially rigid component on the base body in order to indicate the predefined positions of the adjustment pin, as limits of the rotation range.
  • the friction element and the clicking element are designed as a combination component.
  • the number of components required is thus reduced.
  • the combination component furthermore comprises a rotational movement-limiting projection integral with the combination component. In this way, three functions are performed by only one combination component, which reduces the number of components with respect to the prior art still further.
  • the switching device according to the invention is thus assembled more quickly than devices of prior art.
  • the combination component coupled to the adjustment pin is able to rotate therewith.
  • the component coupled to the pin must not be able to be displaced together with the pin, which could have an adverse effect on the operation of the components.
  • This displacement is avoided by making the combination component to be held rather stationary with respect to the base body, by means of an integral stop means of the latter, but being slightly slidable under prestressing when it engages the base body.
  • the setting spindle 9 is the adjustment pin which interacts by axial displacement via the diaphragm 6, with the actuating arm 3 to switching the electric contact 10.
  • the setting spindle 9 is provided with a longitudinal portion 9a threaded in a nut 41.
  • the nut 41 which is provided on the outside with a collar 33, is a riveted nut which is fastened in a bore in a base wall 25 of the base body 2, and is also used to calibrate the switching device, by rotating the nut 4 with respect to the base body with the aid of a special tool.
  • the actuating arm 3 is supported in a back wall 28 of the base body.
  • the combination component 15, shown in figures 2 and 3, comprises a disc-like portion 16 provided with a movement-limiting projection 17, situated in the plane of the disc-like portion 16. Furthermore, the combination component 15 comprises a central opening 18 for fastening the combination component to the adjustment pin 9, the opening 18 has two bent lips 19, which serve to allow the adjustment pin 9 to advance without being accompanied by the combination component 15, and having the adjustment pin 9 therefor a semi-circular cross section 9b.
  • Two raised wings 20 and 21, each with a cutout 22 and 23 respectively, are connected to the disc-like portion 16, and close to its free end, the wing 21 comprises a clicking tongue 24 which extends substantially transversely thereto.
  • the adjustment pin 9 may couple a separated angular movement-limiting element.
  • the combination component 15 is slid onto the adjustment pin 9, and is clamped onto the riveted nut 41, by fitting the collar 33 of the later in a snap-in manner into the cutouts 22 and 23, which form the stop which serves to hold the combination component 15 substantially stationary as the adjustment pin 9 advances with respect to the base body 2, in other words to keep it substantially in position with respect to the base body 2.
  • a part 37 is cut out of the base wall 25 of the base body and bent upwards, which part 37 has a stop 38, which is able to interact with the movement-limiting projection 17 on the combination component 15, and a tab 39, which is able to interact with the clicking tongue 24 of the combination component.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Control Devices (AREA)
  • Thermally Actuated Switches (AREA)
  • Transmission Devices (AREA)
  • Braking Arrangements (AREA)
  • Mechanical Operated Clutches (AREA)

Claims (3)

  1. Ein wärmebetätigter Schalter (1), umfassend einen Grundkörper (2), einen elektrischen Schalter (10), Mittel (3) zur Betätigung des Schalters (10) in Reaktion auf eine wärmeempfindliche Vorrichtung (6), eine Einstellspindel (9) zur Einstellung der Umschalttemperatur, Mittel (16, 20, 21, 22) in Form einer Scheibe aus Metall, die mit der Einstellspindel (9) verbunden und mit ihr drehbar sind, Mittel (24, 37) zur Anzeige von mindestens einer vorbestimmten Winkelposition der Einstellspindel (9) bezüglich des Temperaturbereichs, und Mittel (17, 38) zur Begrenzung der Drehbewegung der Einstellspindel (9), dadurch gekennzeichnet, daß der Grundkörper (2) eine Kalibriermutter (14) zur Führung der Fortbewegung der Einstellspindel (9) hält und die Reibungsmittel (16, 20, 21, 22) und die Anzeigemittel (24, 37) in einer Kombinationskomponente (15) enthalten sind, welche über der Kalibriermutter (41) befestigt und mit ihr verbunden ist, und der auf Anforderung ein leichtes Gleiten möglich ist, mit dem Ziel, sich bezüglich des Grundkörpers (2) in Position zu halten.
  2. Ein wärmebetätigter Schalter nach Anspruch 1, dadurch gekennzeichnet, daß die Kombinationskomponente (15) zum einen mit einer Klickzunge (4) zur Anzeige versehen ist, die mit einem starren Teil (37), das zum Grundkörper (2) gehört, in Kontakt tritt, und zum anderen einen Vorsprung (17) besitzt, der mit einem Anschlag (38) des starren Teils (37) auf dem Grundkörper in Wechselwirkung tritt, um die Drehbewegung zu begrenzen.
  3. Ein wärmebetätigter Schalter nach Anspruch 1, dadurch gekennzeichnet, daß die Kombinationskomponente (15) einen kreisförmigen Abschnitt (16) mit einer zentralen Öffnung zur Befestigung auf der Einstellspindel (9), zwei hochgelegte Flügel (20, 21) mit ausgesparten Öffnungen (22, 23), die über der Kalibriermutter (41) über Schnappverbindungen mit einem Ring (33) verbunden sind, und Anschlagsmittel (22, 23, 33) für die axiale Fortbewegung der Kombinationskomponente umfaßt.
EP19980500214 1997-10-08 1998-10-02 Ein wärmebetätigter Schalter mit einer Kombinationskomponente Expired - Lifetime EP0908911B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1007229A NL1007229C2 (nl) 1997-10-08 1997-10-08 Schakelinrichting, in het bijzonder thermische schakelinrichting met combinatie-onderdeel.
NL1007229 1997-10-08

Publications (2)

Publication Number Publication Date
EP0908911A1 EP0908911A1 (de) 1999-04-14
EP0908911B1 true EP0908911B1 (de) 2001-06-27

Family

ID=19765806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980500214 Expired - Lifetime EP0908911B1 (de) 1997-10-08 1998-10-02 Ein wärmebetätigter Schalter mit einer Kombinationskomponente

Country Status (4)

Country Link
EP (1) EP0908911B1 (de)
DE (1) DE69800985T2 (de)
ES (1) ES2159427T3 (de)
NL (1) NL1007229C2 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1454689A (en) * 1974-07-17 1976-11-03 Australian Controls Ind Pty Lt Energy regulator
US4274546A (en) * 1977-12-29 1981-06-23 Robertshaw Controls Company Condition responsive electrical switch construction and parts and methods therefor
US4214224A (en) * 1978-09-25 1980-07-22 White Consolidated Industries, Inc. Multi-function self-cleaning oven thermostat
DE3844472A1 (de) * 1988-12-31 1990-07-05 Ego Elektro Blanc & Fischer Schaltgeraet

Also Published As

Publication number Publication date
DE69800985T2 (de) 2002-01-17
NL1007229C2 (nl) 1999-05-04
EP0908911A1 (de) 1999-04-14
DE69800985D1 (de) 2001-08-02
ES2159427T3 (es) 2001-10-01
NL1007229A1 (nl) 1999-04-15

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