EP0410119A2 - Thermostat à mécanisme de commutation bimétallique - Google Patents

Thermostat à mécanisme de commutation bimétallique Download PDF

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Publication number
EP0410119A2
EP0410119A2 EP90110937A EP90110937A EP0410119A2 EP 0410119 A2 EP0410119 A2 EP 0410119A2 EP 90110937 A EP90110937 A EP 90110937A EP 90110937 A EP90110937 A EP 90110937A EP 0410119 A2 EP0410119 A2 EP 0410119A2
Authority
EP
European Patent Office
Prior art keywords
housing
switch according
cover part
circuit board
switch
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
EP90110937A
Other languages
German (de)
English (en)
Other versions
EP0410119A3 (en
EP0410119B1 (fr
Inventor
Peter Hofsäss
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.)
HOFSAESS, BENJAMIN MICHAEL
HOFSAESS, CAROLA RIKA
HOFSAESS, DENISE PETRA
HOFSAESS, HENRIK PETER
HOFSAESS, MARCEL PETER
HOFSAESS, ULRIKA
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
Priority claimed from DE8908999U external-priority patent/DE8908999U1/de
Priority claimed from DE8915123U external-priority patent/DE8915123U1/de
Application filed by Individual filed Critical Individual
Publication of EP0410119A2 publication Critical patent/EP0410119A2/fr
Publication of EP0410119A3 publication Critical patent/EP0410119A3/de
Application granted granted Critical
Publication of EP0410119B1 publication Critical patent/EP0410119B1/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
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H37/5427—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing
    • H01H37/5436—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing mounted on controlled apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals

Definitions

  • the invention relates to a temperature switch, in particular a temperature monitor for an electric motor with a bimetal switch mechanism in a housing.
  • temperature switches with bimetallic switching mechanisms are provided, which are fixed in the electrical circuit of the electric motor by contacting the electric motor on the electric motor, in particular on its stator, to be fastened with printed circuit boards provided with conductor tracks. This is done by bending the flexible connecting wires of the temperature switch, if necessary after carrying out perforations in the circuit board, and soldering them flat to the corresponding conductor tracks of the circuit board. This must be done by hand.
  • the circuit board is placed on a side extension of the electric motor (stator), whereby the bimetallic switch comes to rest between the circuit board and the motor winding, in which area the windings must be pushed aside so that the circuit board can be properly placed.
  • the bimetallic switch comes to rest between the circuit board and the motor winding, in which area the windings must be pushed aside so that the circuit board can be properly placed.
  • it often happens that it is not exactly perpendicular to the axis of rotation, but tilted to it, since it is pushed aside at the location of the bimetal switch. This often has a bulge due to casting compound and is therefore not parallel to the circuit board, but, often also due to one-sided tension caused by soldering to the connecting wires, canted to this.
  • the invention has for its object to provide a temperature switch while avoiding the aforementioned disadvantages, the use and contacting can be largely automated.
  • a temperature switch in particular for protecting electric motors on a printed circuit board for the electric motor, with a bimetal switch and a housing, which is characterized in that the housing is provided with an extension which has undercuts and that Connection contacts are arranged parallel to the approach.
  • the undercut approach separates the electrical contact from the mechanical connection of the switch to the circuit board, while in the prior art the mechanical connection and the electrical contact are made together via the connecting wires to be bent.
  • switches are simply plugged onto the printed circuit board, be it perpendicular to it, or be it through laterally open slots in the plane of the same, as a result of which the mechanical connection is initially achieved.
  • electrical contacting of the connection contacts with the conductor tracks can also take place in an automated manner by means of soldering points.
  • the temperature switch according to the invention can be connected fully automatically to an electrical circuit board, to which it is securely attached, and in particular the further electrical connections can be made fully automatically and can be handled in a simple and convenient manner for further processing by means of the part formed by the circuit board and temperature switch.
  • the temperature switch according to the invention Due to the design of the temperature switch according to the invention, this can in particular first be handled as a piece and, for example, can be fed from a vibrating pot to an automatic assembly machine which automatically presses its connection attachment through a corresponding opening in a circuit board and thus reliably fixes the switch on the circuit board.
  • the connection lugs are pushed through it, so that after the switch on the circuit board has been fixed in the manner explained above, the electrical connection between the connection lugs and conductor tracks on the circuit board is also effected fully automatically simply by setting soldering points can be.
  • This part of the circuit board and the temperature switch according to the invention combined in this way can then be simplified and be conveniently treated as bulk goods and sent for further processing.
  • the housing has an electrically conductive lower housing part and a cover part made of electrically insulated material, or that the extension is provided with a slot extending in its longitudinal direction and projecting from the outside inwards, the lateral boundary areas of which form spring sections.
  • connection extension extends perpendicular to the surface of the cover part of the outer housing, in particular connection legs for electrical contacting extending parallel to the extension.
  • a further embodiment is characterized in that the pot part of the outer housing has an integrally formed connecting leg, the connecting leg being integrally connected to the pot part of the outer housing via a connecting section which is partially bent over the cover part.
  • the spring part is designed such that, in addition to the connecting leg protruding through the opening of the cover part of the outer housing, it has a connecting section which extends at right angles to this and is arranged inside the housing, at the end of which opposite the connecting leg is integrally formed with the connecting section with spring legs which are slightly formed the plane of the connecting section are bent out.
  • connection approach is provided with a slot between two legs and that the undercuts are formed by two-stage noses, which are arranged at different distances from the surface of the cover part of the outer housing, in particular with the pot part of the outer housing via the cover part of this pressing tabs against the end faces of the pot part are formed.
  • the housing is provided with a projection which extends essentially vertically from its surface, which has undercuts and that connecting contacts extend parallel to the projection, it also being possible for the projection to have a projection in it Longitudinally extending, from the outside inwardly projecting slot is provided, the lateral boundary areas form spring sections.
  • the approach consists of plastic, in particular the approach and optionally with a cover is a plastic tip and that the lower housing part is a deep-drawn metal part. In the latter case, it can further be provided that a connection contact is formed in one piece on the lower housing part, the connection contact being cut out from protrusions of the deep-drawn lower housing part.
  • connection of the lower part of the housing and the cover can take place in that the cover is held by bent holding tabs of the lower part of the housing and in particular further in that a connection contact is designed as a holding tab and extends radially inward from the outer edge of the housing via the cover and then perpendicularly from the cover is turned upwards.
  • the bimetal switching mechanism has its own (inner) housing in the ( External) housing is arranged.
  • the housing of the temperature switch explained above serves only as an outer housing, while a conventional switchgear completely encapsulated in an inner housing is used in this, which can be taken from the series production of such switching mechanisms.
  • This then does not have to be provided with connecting wires, as is otherwise the case, but rather is used as such directly in the lower part of the outer housing, it being provided that the inner housing has an inner housing pot and an inner housing cover part insulated from it, both from Metal.
  • connection contact is formed in one piece with a spring part which engages resiliently between the cover of the outer housing and the inner housing, the spring part also being formed by spring tabs bent from its plane relative to a connecting web.
  • the undercut approach is form-fitting attacks an annular circuit board, which has mutually insulated conductor tracks, on the one hand the circuit board in the area of at least two non-electrically connected conductor tracks each has an opening at a distance corresponding to the distance between the connecting contacts and that a slot is formed between the openings, the width of which corresponds to an undercut web of the approach and in particular that the slot is aligned perpendicular to the radius of the circuit board, on the other hand, from the outside of the circuit board tte essentially radially parallel slots extend in the middle of the approach engages with its web, while protrude through the outer contacts.
  • a temperature switch is created which, in its further processing, that is to say in particular in the mechanical and electrical connection to printed circuit boards, no longer requires any manual work, but can be connected to these (mechanically and electrically) fully automatically.
  • the manufacture of the temperature switch according to the invention is itself simplified and can be automated since no connecting wires have to be manually soldered or welded to them. Rather you can the few individual parts of the temperature switch according to the invention are automatically guided separately from one another by feeding the pot part of the outer housing in a conveyor device, such as a conveyor chain.
  • the rear deraille with the inner housing are also automatically fed to it by simply shaking them in. They are then picked up by the corresponding processing device and inserted into the pot part.
  • the temperature switch 1 has an (outer) housing 2 with a lower housing part 3 and a housing cover part 4.
  • the bimetallic switchgear is housed (not shown in detail), which can also be used as a complete switchgear, encapsulated in an inner casing, in the outer casing 2 (see below), but need not be; the open rear derailleur could also be accommodated in the housing 2, which would then form the only housing of the rear derailleur.
  • a fastening or holding attachment 6 extends vertically upward from the cover part 4.
  • the holding projection 6 has two spring legs 11, 11a separated by a slot 12.
  • the legs 5a, 5b are provided with undercuts 7, which are formed by holding lugs or shoulders 16 at a distance from the top surface of the cover part 4 on the holding attachment 6 and project laterally from a web part 9 of the holding attachment 6.
  • Recesses 10 are provided between the holding lugs 16, 17, in order to be able to better apply solderings 27 to connecting parts 51 (see below) to be explained.
  • the slot 12 extending in the longitudinal direction between the legs 11 and extending inwards from the outside perpendicular to the top surface of the cover 4 gives the spring legs 11, 11a their resilient properties.
  • connecting lugs 13, 14, which are made of dimensionally stable metal, likewise extend perpendicular to the top surface of the lid.
  • the switch 1 described so far is fastened according to FIGS. 4 to 6 in one way or another to an annular circuit board 20 for an electric motor.
  • the circuit board 20 has one or more conductor tracks 21, 22, which generally only extend over a partial circumference of the circuit board 20 and are not in direct electrical contact with one another.
  • the conductor tracks are used to make contact or to connect the coil windings by connecting the coil ends to the corresponding conductor tracks, usually by means of solder contacts, which are in turn connected - also soldered - to connecting cables by means of which the motor is connected to the voltage supply.
  • the coil ends are guided through bores or lateral slots from the side of the circuit board 20 facing away from the conductor tracks 21, 22 to the side of the conductor tracks.
  • the connecting cables are routed in the region of a part-circular outer recess to the circuit board and from there through adjacent bores as well as connecting send soldered. This creates a certain strain relief.
  • the circuit board 20 of FIG. 3 now has a slot 23 extending perpendicular to the radius R between the two conductor tracks 21, 22 running parallel to one another, the length of which corresponds to the length of the extension 6 and the width thereof to the width of the web 9 of the extension 6 corresponds.
  • the switch 1 is positively attached to the printed circuit board 20 by the retaining lug 6 having been inserted through the slot 23 by means of its spring portions tapering towards its free end until the shoulders 8 engage behind the printed circuit board 20, snap over the edges of the slot 23 and thus the Set switch 1 on the circuit board 20.
  • the connection contacts 13, 14 are guided through the openings 24, 26 and extend through them.
  • the contacts 13, 14 are then connected to the conductor tracks 21, 22 by soldering 27 (FIG. 4; not shown in FIG. 3 for the sake of clarity).
  • three parallel slots 31, 32, 33 are provided in the printed circuit board free of its outer edge 28, the middle one of which has a length which again essentially corresponds to the length of the holding projection 6 and the width of which corresponds to the width of the web 9 of the retaining lug 6, while the slots 32, 33 are arranged on both sides of the slot 31 at a distance which essentially corresponds to the distance between the connecting contacts 13, 14 of the switch 1 and the retaining lug 6.
  • the printed circuit board 20 is pushed in the area of the slot 31 between the housing 2 and the shoulders 8 on the retaining projection 6 of the switch 1 in such a way that the web 9 of the retaining projection 6 engages in the slot 31 while the connecting contacts 13, 14 pass through the slots 32.33 protrude.
  • the connection contacts 13, 14 are in the region of conductor tracks 21, 22, which are arranged here on the same circumference, but are electrically separated from one another by the slot 31.
  • soldering points 27 can again be provided for the electrical connection of the connections 13 and 14 to the conductor track regions 21 and 22, respectively.
  • FIGS. 7 and 8 show a preferred embodiment of the temperature switch according to the invention in a partially sectioned illustration.
  • the temperature switch 1 likewise has, in a manner known per se, a bimetallic switching mechanism arranged in the inner housing 41, which can itself be designed in various ways.
  • the inner housing 41 consists of a pot part 42 and a cover part 43, which are electrically separated from one another by insulation 44, for example sheets of insulating material or insulating layers, the pot part 42 and cover part 43 being firmly connected to one another by a bent edge 46 of the pot part 42, the latter being kept isolated from the cover part 43 by the insulation.
  • Pot part 3 and cover part 4 are electrically conductive and are each in electrical connection with one of the two contact parts of the bimetal switchgear which can be brought into contact with one another inside the housing 41, so that they form the two connections for the bimetallic switchgear.
  • the inner housing 41 is inserted into an (outer) housing 2.
  • the outer housing 2 also has a lower housing part 3 on the one hand and a cover part 4 on the other hand.
  • the lower housing part 3 consists of electrically conductive material, for example steel.
  • the cover part 4 consists of insulating material, such as a high temperature resistant plastic or the like.
  • the cover part 4 is here also provided with a fastening or holding attachment 6, which has a slot 12 between two legs 11, 11a, which are formed and arranged in mirror image with respect to one another, which enables a certain elasticity of the legs 11, 11a perpendicular to their direction of extension .
  • the legs 11, 11a are provided with lugs 16, 17 with which they can reach behind electrical circuit boards of different thicknesses, namely on the one hand with a thickness that corresponds to the distance of the nose 16 to the outer cover surface 18 of the cover part 4, and on the other hand a circuit board with a lesser thickness , which corresponds to the distance between the nose 17 and the outer cover surface 18 of the cover part 4. Furthermore, an opening 24 is formed at a distance from the shoulder 6 in the cover part 4, through which the connecting leg or contact 13 of a connecting part or contact spring part 51 projects.
  • the contact spring or connecting part 51 has, in addition to the connecting leg 13, a leaf spring part 52 which is formed by a connecting web 56 to the connecting leg 13 and spring legs 52, which are formed integrally with the connecting web 56 at the end opposite the connecting leg and out of the plane of the connecting web 56 are slightly bent out.
  • the Connection leg 13 extends essentially at right angles to the connecting web 56. This configuration allows the spring part 51 with its spring legs 53 and the connecting web 56 to be arranged between the cover part 43 of the inner housing and the cover part 4 of the outer housing 2, the connecting leg 13 through the opening 24 Outside of the cover part 4 protrudes.
  • the spring part 51 with its spring legs 53 is pressed firmly against the conductive cover part 43 of the inner housing 41, so that a reliable Electrical contact between the conductive cover part 43 of the inner housing 41 and the spring part 51 is made so that the latter can be used for contacting the contact leg 22.
  • the contact pressure for the cover part 4 is formed on the one hand by tabs 49 formed in one piece on the upper edge 46 of the pot part 3, which are bent under pressure over the cover part 4, as can be seen in particular in FIG.
  • connection part 45 is also formed in one piece with the pot part 3, which consists of a connection part 47 emerging directly at the upper edge 28 of the pot part 3, which is also bent horizontally over the cover part 4 and exerts a contact pressure on the latter.
  • the connecting part 47 merges in one piece into the connecting leg 14 which extends perpendicularly from the surface 18 of the cover part 9 and is aligned parallel to the connecting leg 13.
  • the temperature switch according to the invention in the explained training is again intended for use with an electrical circuit board.
  • This has 6 openings in the area of the connecting legs 13, 14 and the connecting extension, the length of which corresponds to the width of the connecting legs 13, 14 and the connecting extension 6 and the width of the thickness of the contact legs 13, 14 and the strength of the connecting extension 6 in the latter Transitional area corresponds to the actual cover part 4 and in particular lies below the distance between the opposite lugs 17 and 16 of the two legs 12, 13.
  • the temperature switch designed according to the invention can be connected fully automatically, for example after being fed from a vibrating pot, to a printed circuit board by inserting the extension 6 and the connecting legs 13, 14 through the corresponding openings in the printed circuit board, the leg parts 11, 11a being slightly pressed together until in each case two lugs 16 and 17, after passing through the shoulder 11, grip behind the printed circuit board and the temperature switch is reliably fixed to this.
  • the circuit board provided with the temperature switch can then in turn be handled in a simple manner as a protective part. Further contacts can also be made fully automatically, provided that the circuit board has conductor tracks that end in the area of the openings receiving the connecting legs 13, 14, only electrical contact connections are made there by means of soldering points to the conductor tracks of the circuit board.
  • conventional encapsulated bimetallic switchgear can be used, which are not yet provided with connecting cables by simply being inserted into the outer housing 2, in the manner described clocked and the housing is then closed in the form described by placing the cover and setting the same on the lower part.
  • the housing dimensions only increase by a fraction of a millimeter compared to the encapsulated rear derailleur.
  • the bimetallic switching mechanism can also be inserted as such into the lower housing part 3 of the housing and this can then be closed in a suitable manner, with a fluid-tight closure, in particular in addition to the described configuration, as is the case with the encapsulated bimetal Switchgear itself is the case.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
EP90110937A 1989-07-25 1990-06-09 Thermostat à mécanisme de commutation bimétallique Expired - Lifetime EP0410119B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8908999U 1989-07-25
DE8908999U DE8908999U1 (de) 1989-07-25 1989-07-25 Temperaturschalter mit Bimetall-Schaltwerk
DE8915123U 1989-12-23
DE8915123U DE8915123U1 (de) 1989-12-23 1989-12-23 Temperaturschalter

Publications (3)

Publication Number Publication Date
EP0410119A2 true EP0410119A2 (fr) 1991-01-30
EP0410119A3 EP0410119A3 (en) 1991-06-12
EP0410119B1 EP0410119B1 (fr) 1995-10-18

Family

ID=25955053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110937A Expired - Lifetime EP0410119B1 (fr) 1989-07-25 1990-06-09 Thermostat à mécanisme de commutation bimétallique

Country Status (4)

Country Link
US (1) US5046156A (fr)
EP (1) EP0410119B1 (fr)
JP (1) JP2558972Y2 (fr)
DE (1) DE59009787D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0544244A3 (fr) * 1991-11-26 1994-01-12 Ego Elektro Blanc & Fischer

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19609577C2 (de) * 1996-03-12 1998-02-19 Thermik Geraetebau Gmbh Schalter mit einem temperaturabhängigen Schaltwerk
JP2000217314A (ja) * 1999-01-26 2000-08-04 Mitsubishi Electric Corp スタ―タ
ITMI20040189U1 (it) 2004-04-27 2004-07-27 Elettrotec Srl Termostato bimetallico con contatto in scambio con circuito stampato interposto tra un elemento termostatico sensibile ed un rele' di scambio
US20090118180A1 (en) * 2005-09-29 2009-05-07 Institut National De La Sante Et De La Recherche Medicale (Inserm) Use of fusion proteins for the prevention or the treatment of pathologies resulting from ischemia
FR2914138B1 (fr) * 2007-03-23 2010-09-10 Cotherm Sa Dispositif de securite et de commande d'un appareil electro-domestique.
FR2951861B1 (fr) 2009-10-27 2011-11-25 Cotherm Sa Thermostat hybride pour chauffe-eau electrique
CN112787432B (zh) * 2019-11-01 2022-10-11 上海海立电器有限公司 一种内置式保护器的基座结构

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1323268A (en) * 1971-04-23 1973-07-11 Jermyn T Jermyn Ind Manufacture of electric components
US4268812A (en) * 1979-06-18 1981-05-19 Satterlee Jesse D Miniature device for sensing overheating of bearings
JPS569774U (fr) * 1979-06-29 1981-01-27
US4314223A (en) * 1980-12-11 1982-02-02 Mcgraw-Edison Company Thermal protective device for lighting fixtures
JPS58150811U (ja) * 1982-04-02 1983-10-08 中遠電子工業株式会社 小型トランス
US4446451A (en) * 1982-12-15 1984-05-01 Texas Instruments Incorporated Thermostat device having improved mounting means
DE3340436A1 (de) * 1983-11-09 1985-05-23 Gerhard 7262 Althengstett Kurz Elektrischer unter- oder ueberdruckschalter
DE8607370U1 (de) * 1986-03-18 1987-04-16 Hofsäss, Peter, 75181 Pforzheim Thermoschalter zum Einbau in ein Gerät

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0544244A3 (fr) * 1991-11-26 1994-01-12 Ego Elektro Blanc & Fischer
TR26583A (tr) * 1991-11-26 1995-03-15 Ego Elektro Blanc & Fischer TEMPERATüR ALGILAMA CIHAZI
US5420398A (en) * 1991-11-26 1995-05-30 E.G.O. Elektro-Gerate Blanc U. Fischer Temperature detection device

Also Published As

Publication number Publication date
DE59009787D1 (de) 1995-11-23
EP0410119A3 (en) 1991-06-12
EP0410119B1 (fr) 1995-10-18
JPH0335637U (fr) 1991-04-08
JP2558972Y2 (ja) 1998-01-14
US5046156A (en) 1991-09-03

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