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EP0626709B1 - Dispositif de commutation dépendant de la température - Google Patents

Dispositif de commutation dépendant de la température Download PDF

Info

Publication number
EP0626709B1
EP0626709B1 EP93120280A EP93120280A EP0626709B1 EP 0626709 B1 EP0626709 B1 EP 0626709B1 EP 93120280 A EP93120280 A EP 93120280A EP 93120280 A EP93120280 A EP 93120280A EP 0626709 B1 EP0626709 B1 EP 0626709B1
Authority
EP
European Patent Office
Prior art keywords
sheet metal
switching device
metal moulding
retaining means
receptacle
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
EP93120280A
Other languages
German (de)
English (en)
Other versions
EP0626709A2 (fr
EP0626709A3 (fr
Inventor
Dieter Wahler
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.)
Gustav Wahler GmbH and Co KG
Original Assignee
Gustav Wahler 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 Gustav Wahler GmbH and Co KG filed Critical Gustav Wahler GmbH and Co KG
Publication of EP0626709A2 publication Critical patent/EP0626709A2/fr
Publication of EP0626709A3 publication Critical patent/EP0626709A3/fr
Application granted granted Critical
Publication of EP0626709B1 publication Critical patent/EP0626709B1/fr
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
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/04—Bases; Housings; Mountings

Definitions

  • the invention relates to a temperature-dependent switching device of the type mentioned in the preamble of claim 1 (GB-A-2 165 697).
  • temperature-dependent switching devices of this type, for example from DE-B-2 444 931, in which the housing is made of a metallic turned part, which is thus produced in a complex manner by machining, with a recess being formed in this machined housing the receptacle for the expansion material is incorporated.
  • an inner flanged edge of the housing is provided, which is flanged with working pistons for fixing the guide part after the membrane and the guide part have been inserted.
  • Such a switching device requires a large amount of manufacturing technology due to the machining.
  • the switching device is expensive, due to the machining of the material used, expensive and relatively heavy. The manufacturing costs of such a switching device are therefore very high.
  • the guide part and a remaining approximately cup-shaped housing part as a one-piece base body in the form of a plastic molded part, to which the carrier plate with the electrical switching element is attached on one side and on the opposite side a metallic approach with a receptacle for the expansion material.
  • This metallic approach surrounds the base body like a jacket and is attached to it by means of a flare connection.
  • the invention has for its object to design a temperature-dependent switching device of the type mentioned so that the manufacturing costs are reduced.
  • the switching device has only, as a housing, the sheet metal blank, which on the one hand forms the approximately cup-shaped receptacle for the expansion material, on the other hand receives and fixes the guide part and which also receives the electrical switching element, namely its carrier plate, at the other end, which means that Interior, into which the elements of the switching element extend, is closed to the outside.
  • a housing in the form of the sheet metal blank is particularly inexpensive to manufacture, for example by pulling or pressing.
  • the invention is explained below with reference to an embodiment shown in the drawing.
  • the drawing shows a schematic section with a partial side view of a temperature-dependent switching device.
  • the temperature-dependent switching device 10 shown has two components, namely on the one hand a thermostatic working element 11 and on the other hand an electrical switching element 12 which is actuated by the working element 11.
  • the electrical switching element 12 has a carrier plate 13 made of plastic, of which electrical connection elements protrude outwards. As such connection elements, only one outwardly projecting contact tab 14 can be seen in the drawing. There may be additional contact flags that are not visible in the drawing.
  • the carrier plate 13 carries a microswitch 15 of conventional type, which is placed on the side of the carrier plate 13 in the drawing below and protrudes downwards with elements there.
  • the microswitch 15 has a support part 16, e.g. an angle, which is formed in one piece with the visible, outwardly projecting contact tab 14 and into the carrier plate 13 e.g. injected, poured or otherwise embedded.
  • a switching rocker 17, provided with a recess therefor, is attached to the supporting part 16, in a conventional manner such that this switching rocker 17 is thus articulated on the supporting part 16.
  • the rocker switch 17 is bent at the lower end in the drawing to form a curved part 18.
  • the rocker switch 17 projects with an end part to the left over the support part 16 in the drawing, a spring 19 having one end being hooked into this end part.
  • the other end of the spring 19 is hooked into a contact tongue 20.
  • the contact tongue 20 is supported with an end on the left in the drawing, which can be designed in the manner of a knife, in a groove on the right side of the support part 16 in the drawing.
  • the contact tongue 20 is provided with a contact 21.
  • Switch contacts 22 and 23, which are arranged in a fixed position, are assigned to contact 21. Both switch contacts 22, 23 or at least one of them are formed in one piece with contact lugs which are led out of the carrier plate 13 analogously to the contact lug 14 and protrude beyond the latter.
  • the operation of the microswitch 15 is common.
  • the rocker switch 17 is pivoted about its pivot bearing point on the support part 16 such that the arc part 18 in the drawing migrates upward, so that the end of the spring 19 attached to the rocker switch 17 moves beyond the bearing point of the contact tongue 20, so that the direction of force of the spring 19 changes abruptly such that the contact tongue 20 snaps into another position in which you Contact 21 is present at switching contact 23.
  • the thermostatic working element 11 serves to actuate the switching element 12, in particular the rocker switch 17. Both the thermostatic working element 11 and the electrical switching element 12 are accommodated in a housing 30 which, in the drawing, has a metallic receptacle 31 for an expansion material 32 therein.
  • the receptacle 31 is closed at the top with a rubber-elastic membrane 33 and sealed to the outside.
  • the membrane 33 has a bead-like thickened edge 34 which in the drawing points upwards and which is in a corresponding recess 35, e.g. Annular groove, a plate-shaped or disc-shaped guide part 36 located above it is received.
  • the edge 37 of the membrane 33 which surrounds the approximately cup-shaped receptacle 31, is clamped between the facing underside of the guide part 36 and a contact surface 38 of the receptacle 31, in such a way that a tight seal of the cup-shaped receptacle 31 and the expansion material contained therein 32 takes place.
  • the guide part 36 contains a recess 39 in the center, for example a through hole, in which a working piston 40 is guided so as to be displaceable in the vertical direction.
  • the working piston 40 is in the rest position shown in the drawing with the lower end of its bolt-shaped part either on the membrane 33 or it is located a short distance above this.
  • the working piston 40 has a wider head part 41, which is supported with its underside on the upper side of the guide part 36 and on the upper side of which the rocker switch 17 rests with its curved part 18.
  • the membrane 33 is bulged upwards at least in the region of the recess 39, as a result of which the working piston 40 is pushed upwards. This results in the switching of the contact blade 20 explained at the outset by means of a pivoting movement of the rocker switch 17. If the expansion material 32 cools down in the receptacle 31 with a reduction in volume, the spring 19 of the switching element 12 and the rocker switch 17 return the working piston 40 to the starting position shown and also bring the diaphragm 33 back into this starting position.
  • the housing 30 is formed from a one-piece metal sheet molding 42 which, to form the cup-shaped receptacle 31, has an approximately cup-shaped projection 43 projecting downwards and is common to the thermostatic working element 11 and the electrical switching element 12 and accommodates both together.
  • the sheet metal blank 42 thus encloses an interior 44 above the guide part 36 with a cylinder part there, which is sealed on the upper side by the carrier plate 13 of the switching element 12.
  • the sheet metal blank 42 is e.g. made of brass. It can be produced in a simple manner by pulling or instead also by pressing, in any case by non-cutting shaping.
  • the sheet metal blank 42 extends as a one-piece component from the cup-shaped receptacle 31 up to the support plate 13.
  • the sheet metal blank 42 encompasses an outer edge 45 of the support plate 13 in a form-fitting manner.
  • the carrier plate 13 is fastened to the sheet metal blank 42 by plastic deformation of the edge 46 there of the sheet metal blank 42 in the region of the outer edge 45.
  • the edge 46 is e.g. crimped over the outer edge 45 of the carrier plate 13.
  • a support shoulder 47 is formed on the edge 46, on which the carrier plate 13 is seated.
  • the underside of the guide part 36 is supported on the contact surface 38 which surrounds the receptacle 31.
  • the guide part 36 is fixed in the housing 30, in particular sheet metal blank 42, in such a way that e.g. plate-shaped guide part 36 on its outer surface 48 is encompassed by the wall part 49 there of the sheet metal blank 42.
  • the sheet metal blank 42 can e.g. consist of a rotationally symmetrical and thus essentially cylindrical part.
  • the wall part 49 is also a cylinder wall part.
  • the guide part 36 is pressed against the contact surface 38 by a part of the metal sheet molding 42 with elastic deformation of the edge 37 of the membrane 33.
  • the sheet metal blank 42 thus also causes the guide part 36 to be fixed in the direction of the axis of the working piston 40. This is particularly advantageous because it does not require any other complex additional components or separate fastening elements in order to hold the guide part 36 in the direction of the longitudinal central axis of the working piston 40.
  • the sheet metal blank 42 has one or more holding means 50 for the guide part 36.
  • the holding means 50 are directed from the outside inwards and overlap the guide part 36 at least slightly on the upper side, which faces the electrical switching element 12. It is particularly advantageous if the holding means 50, as in the exemplary embodiment shown, are in one piece with the metal sheet blank 42. This leads to a particularly large saving in manufacturing costs, material and weight and thus to a particularly large reduction in price.
  • the holding means 50 are e.g. from projections 51, 52 directed from the outside in, which are advantageously formed, in particular pressed out, from the material of the sheet metal blank 42.
  • the protrusions 51, 52 are e.g. formed from beads, webs or the like. In the embodiment shown, e.g. two diametrically opposite projections 51, 52 are provided. It may also be sufficient to provide only one such projection 51.
  • the holding means 50 are e.g. from a circumferential bead of the sheet metal blank 42. Instead, a plurality of beads which follow one another in the circumferential direction at intervals from one another can also be provided.
  • the holding means 50 are one or more wall indentations, constrictions, indentations, oblique, for example frustoconical, wall profiles, an inwardly directed annular shoulder or similar wall profiles of the wall of the sheet metal blank 42 are provided, at least in the wall area which, for example, extends cylindrically above the upper side of the guide part 46 in the exemplary embodiment shown.
  • the invention makes use of the basic knowledge that it is sufficient to fix the guide part 36 within the metal sheet blank 42, by means of material deformation of the wall of the metal sheet blank 42, at least in the area above the guide part 36 to fix the latter, i.e. to fix any of the top of the guide member 36 only slightly and only overlapping edge wall areas.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Claims (11)

  1. Dispositif de commutation dépendant de la température, comprenant un élément actif thermostatique (11) et un élément de connexion électrique (12) actionné par ce dernier, tous deux sont montés dans un boîtier, qui est muni d'un logement (31), destiné à recevoir un matériau élastique (32), fermé par une membrane élastique (33), face auquel est monté un piston moteur (40), qui pénètre dans un évidement (35) d'une pièce de guidage (36) et qui est associé à une pièce de commutation (17) de l'élément de connexion électrique (12), qui est monté sur une plaque support (13), réalisée en particulier dans une matière synthétique, à partir de laquelle se détachent vers l'extérieur des éléments de raccordement électriques (14),
    caractérisé en ce que le boîtier (30) est constitué par un corps moulé en tôle métallique (42), commun à l'élément actif thermostatique (11) et à l'élément de connexion électrique (12), montés tous deux dans ledit boîtier muni d'un épaulement (43) comprenant un logement (31) en forme de cuvette, destiné à recevoir le matériau élastique (32), ledit boîtier s'étend d'une seule pièce depuis le logement (31) en forme de cuvette jusqu'à la plaque support (13) de l'élément de connexion électrique (12).
  2. Dispositif de commutation selon la revendication 1, caractérisé en ce que le boîtier moulé en tôle métallique (42) s'étend jusqu'à un bord extérieur (45) de la plaque support (13) et s'engage autour du bord extérieur (45) et en ce que la plaque support (13) est fixée contre le boîtier moulé en tôle métallique (42) par déformation plastique du bord (46) du boîtier moulé en tôle métallique (42), dans la zone du bord extérieur (45).
  3. Dispositif de commutation selon l'une quelconque des revendications 1 à 2, caractérisé en ce que la pièce de guidage (36) est maintenue entre le boîtier moulé en tôle métallique (42) et son épaulement (43).
  4. Dispositif de commutation selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la pièce de guidage (36) s'appuie contre une surface de contact (38), entourant le logement (31) du boîtier moulé en tôle métallique (42), en particulier de l'épaulement (43) de ce dernier.
  5. Dispositif de commutation selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la pièce de guidage (36) est poussée contre la surface de contact (38) par une partie du boîtier moulé en tôle métallique (42), en entraînant une déformation élastique du bord (34, 37) de la membrane (33).
  6. Dispositif de commutation selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le boîtier moulé en tôle métallique (42) est muni d'un ou plusieurs organes de blocage (50) de la pièce de guidage (36), dirigés de l'extérieur vers l'intérieur et chevauchant au moins légèrement la face de la pièce de guidage (36) orientée vers l'élément de connexion électrique (12).
  7. Dispositif de commutation selon la revendication 6, caractérisé en ce que les organes de blocage (50) forment une seule pièce avec le boîtier moulé en tôle métallique (42).
  8. Dispositif de commutation selon les revendications 6 et 7, caractérisé en ce que les organes de blocage (50) sont formés par des saillies (51, 52), dirigées de l'extérieur vers l'intérieur, qui ont été de préférence formées dans le matériau du boîtier moulé en tôle métallique (42), en particulier pressées dans ce dernier.
  9. Dispositif de commutation selon l'une quelconque des revendications 6 à 8, caractérisé en ce que les organes de blocage (50), en particulier des saillies (51, 52), sont constitués par des moulures, des languettes, etc.
  10. Dispositif de commutation selon l'une quelconque des revendications 6 à 9, caractérisé en ce que les organes de blocage (50), en particulier les saillies (51, 52), sont constitués par une moulure périphérique ou plusieurs moulures successives, espacées les unes des autres dans le sens périphérique.
  11. Dispositif de commutation selon l'une quelconque des revendications 6 à 10, caractérisé en ce que les organes de blocage (50), en particulier les saillies, sont formés par une ou plusieurs empreintes, bossages, gorges réalisés dans les parois, par un tracé de paroi oblique, de forme conique, par exemple, par un épaulement dirigé vers l'intérieur ou par des tracés de parois analogues réalisés sur la paroi du boîtier moulé en tôle métallique (42).
EP93120280A 1993-05-25 1993-12-16 Dispositif de commutation dépendant de la température Expired - Lifetime EP0626709B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4317360 1993-05-25
DE4317360A DE4317360A1 (de) 1993-05-25 1993-05-25 Temperaturabhängiges Schaltgerät

Publications (3)

Publication Number Publication Date
EP0626709A2 EP0626709A2 (fr) 1994-11-30
EP0626709A3 EP0626709A3 (fr) 1995-05-17
EP0626709B1 true EP0626709B1 (fr) 1997-01-15

Family

ID=6488861

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93120280A Expired - Lifetime EP0626709B1 (fr) 1993-05-25 1993-12-16 Dispositif de commutation dépendant de la température

Country Status (3)

Country Link
EP (1) EP0626709B1 (fr)
BR (1) BR9402057A (fr)
DE (2) DE4317360A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29501239U1 (de) * 1995-01-27 1995-03-09 Anschütz, Rudolf, 35764 Sinn Thermostatisches Stellelement
DE19609577C2 (de) * 1996-03-12 1998-02-19 Thermik Geraetebau Gmbh Schalter mit einem temperaturabhängigen Schaltwerk

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1988275U (de) * 1968-02-22 1968-06-27 Busch Jaeger Duerener Metall Einsteckthermostat.
DE2444931C3 (de) * 1974-09-20 1981-07-23 Behr-Thomson Dehnstoffregler Gmbh, 7014 Kornwestheim Elektrisches Schaltgerät
DE3437778A1 (de) * 1984-10-16 1986-04-17 Behr-Thomson Dehnstoffregler Gmbh, 7014 Kornwestheim Schaltgeraet
US4626821A (en) * 1985-11-04 1986-12-02 Thermo-O-Disc, Incorporated Sealed thermostat for use in defrost control systems

Also Published As

Publication number Publication date
DE59305158D1 (de) 1997-02-27
DE4317360A1 (de) 1994-12-01
EP0626709A2 (fr) 1994-11-30
EP0626709A3 (fr) 1995-05-17
BR9402057A (pt) 1995-03-28

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