EP0915491B1 - Interrupteur avec un mécanisme de commutation sensible à la température - Google Patents
Interrupteur avec un mécanisme de commutation sensible à la température Download PDFInfo
- Publication number
- EP0915491B1 EP0915491B1 EP98117532A EP98117532A EP0915491B1 EP 0915491 B1 EP0915491 B1 EP 0915491B1 EP 98117532 A EP98117532 A EP 98117532A EP 98117532 A EP98117532 A EP 98117532A EP 0915491 B1 EP0915491 B1 EP 0915491B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- switch
- switching mechanism
- housing part
- housing
- 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
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H81/00—Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting
- H01H81/02—Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting electrothermally operated
Definitions
- the present invention relates to a switch with a housing receiving a temperature-dependent switching mechanism, which has a first housing part, at the inner bottom of which a first external terminal connected to a first electrode is disposed, and a first housing part occlusive second housing part having one with a second external terminal connected second electrode, wherein the switching mechanism depending on its temperature establishes an electrically conductive connection between the first and the second electrode, and in the housing, a series resistor is geometrically and electrically arranged between the switching mechanism and one of the two electrodes, wherein the switch Ceramic support comprises, pointing to the rear derailleur to one of the two electrodes is arranged and carries the series resistor which is connected at one end to the electrode and the other end to a counter-contact for the rear derailleur.
- the known switch has a trough-shaped lower part made of electrically conductive material, whose bottom serves as an electrode.
- a ceramic carrier On the floor is a ceramic carrier, on the u.a. a series resistor is arranged, which is through-contacted by the ceramic carrier, so that it is connected on the one hand to the bottom, ie the first electrode, and on the other hand with a mating contact for a switch arranged in the switching mechanism.
- the known switch acts as a changeover switch, so that it carries current in its two switching positions.
- the known switch is very expensive because of this switching function, it contains several electrically conductive or electrically insulating parts, which also require a complex assembly.
- the first housing part is made of insulating material, in which the first electrode is embedded by encapsulation or encapsulation as an integral part.
- This first housing part is closed by a second housing part in the form of a base made of electrically conductive material, the inside of which acts as a second electrode.
- Both electrodes are, so to speak, disc-shaped sheet-metal parts, on which are integrally formed lugs which serve as external connections of the switch.
- the bottom part rests on a shoulder of the first housing part and is held by a H Schover Weggten ring at this.
- a conventional bimetallic switching mechanism is arranged in the interior of the housing thus formed, the spring washer is supported with its edge on the bottom part and presses the movable contact member carried by it below the switching temperature against an inwardly projecting mating contact on the other electrode.
- a bimetallic snap disk is slipped, which is free of forces below its switching temperature and at a temperature increase beyond its switching point, the movable contact member against the force of the spring washer of the Counter-contact lifts and thereby opens the electrical connection between the two external connections.
- the well-known switch described so far is extremely robust and has very small external dimensions, which is why it is not only universally applicable, but especially where little mounting space is available, e.g. in coils of transformers or electric motors.
- About the bottom part of this switch is thermally coupled very well to a device to be monitored, so that a temperature increase of the device is transmitted directly into the interior of the switch and there leads to a corresponding increase in the temperature of the bimetallic snap disk.
- Such switches are connected in series between the device to be protected and a power supply, so that the operating current of the device to be protected flows through the switch, which consequently shuts off this current at an impermissible temperature increase.
- This protective function of a switch with temperature-dependent switching mechanism is called "current-dependent" switching and thereby causes a series resistor to be connected in series with the switching mechanism, which is also traversed by the operating current of the device to be protected.
- This series resistor and its thermal coupling to the switch performs a certain current flow through the switch and thus the series resistance to the development of a certain amount of heat, in turn, the switch and thus the bimetallic snap disk heated.
- An upper limit for the operating current can thus be predetermined via the resistance value. If the operating current exceeds this value, the bimetallic snap-action disc is raised beyond its switching temperature due to the heat developed in the series resistor so that the switch already opens before the device to be protected has warmed inadmissibly.
- Such a switch is known from DE 43 36 564 A1.
- This switch initially comprises an encapsulated bimetallic switching mechanism housed in a two-part metal housing, as known, for example, from DE 21 21 802 A1.
- This encapsulated switch is now arranged on a ceramic carrier, on which a thick-film resistor is present, which is connected via conductor tracks to the conductive lower part of the encapsulated switching mechanism.
- the other end of the resistor is connected to a solder pad to which a first pigtail is soldered.
- the second pigtail is soldered to the electrically conductive cover part of the encapsulated switching mechanism.
- the ceramic carrier can not be loaded mechanically; during transport as bulk material, hairline cracks occur which can only be detected with a microscope during an incoming inspection. By soldering the wire to the ceramic carrier often dissolve the tracks. Due to this problem, an increased control and testing effort is required, which drives the pricing of the product in the appropriate amount.
- Another disadvantage is the low pressure stability of this construction, which is not suitable for wrapping in windings of transformers or electric motors.
- this known switch has found wide application because the application of a resistor of defined resistance on a ceramic carrier is a well-controlled technique; Thick film resistors used.
- the first housing part is made of insulating material in which the first electrode is held captive, wherein the first electrode on the Rear derailleur facing planar surface, to which the ceramic carrier attached and with the series resistor is electrically connected.
- the ceramic carrier has at least one preferably laser-punched through-hole through which it is soldered to the electrode and the series resistor is electrically connected thereto.
- This measure is structurally advantageous, because it is only one operation required to produce both the mechanical and the electrical connection.
- the laser-punched through holes are made with a secure process in which the ceramic carrier does not jump, so that in the art in connection with ceramic carriers and their processing repeatedly occurring high waste is avoided.
- these ceramic carriers can be delivered magaziniert instead of bulk material to avoid further damage to the ceramic carrier.
- the first electrode is held captive in the first housing part by casting or encapsulation in the manufacture of this housing part such that it is an integral part of this housing part, wherein more preferably the second housing part is an electrically conductive bottom part whose inner bottom acts as a second electrode.
- the switching mechanism comprises an electrically conductive spring washer which carries a movable contact member and operates against a bimetallic snap disk, which sits approximately centrally on the movable contact part, wherein the spring washer is supported with its edge on the one electrode and the movable contact member presses against the other electrode when the derailleur is below its response temperature.
- a new switch 10 is shown in a schematic side view, which includes a temperature-dependent switching mechanism 11 which is arranged in a housing 12.
- the housing 12 has an electrically conductive bottom part 14 and a cup-like cover part 15 of insulating material, which includes an annular space 16, in which the temperature-dependent switching mechanism 11 is inserted.
- the derailleur 11 comprises a movable contact member 17 which is supported by a spring washer 18 and over which a bimetallic snap disk 19 is placed.
- the electrically conductive bottom part 14 forms with its inside an electrode 20, on which the spring washer 18 is supported with its edge 21.
- the bottom part 14 merges integrally into a first outer terminal 22, which is thus electrically conductively connected to the spring washer 18 and thus to the movable contact part 17.
- a second external terminal 23 of the switch 10 is integrally connected to an over-molded electrode 24 disposed on an inner bottom 15 a of the lid member 15.
- the lid part 15 is injected around the electrode 24, so that it is captively embedded in the lid part 15.
- the arrangement is made such that the electrode 24 has a facing to the rear derailleur 11 flat surface 25 to which a ceramic disc 26 is arranged, which carries a fixed counter-contact 27 for the movable contact part 17.
- the ceramic disk 26 has laser-punched passages 28, by means of which it is fastened to the electrode 24 with the aid of soldering points 29. In a manner to be described, a series resistor is arranged between the soldering points 29 and the mating contact 27.
- the electrode 24 with its plane surface 25 in an annular space 30 has, in the after insertion of the electrode 24 in the lid part 15, the ceramic disc 26 is inserted, whereupon then by the solder points 29 both a mechanical and a electrical connection to the electrode 24 is made. Thereafter, the rear derailleur 11 is inserted into the annular space 16, whereupon then the bottom part 14 is placed and secured by an edge 31 and retaining pin 32 on the lid member 15.
- Fig. 2 is a plan view of the switch of Fig. 1 is shown, where now a series resistor 34 is schematically indicated, which is electrically connected via a conductor 35 to the fixed counter-contact 27 and via tracks 36 and 37 with the solder pads 29.
- the series resistor 34 is a conventional thick-film resistor which is placed on the ceramic disk 26 by known and well-controlled techniques, with its resistance value adjusted as precisely as desired, whereby the operating current for switching the switch 10 can be accurately preselected.
- the series resistor 34 arranged on the ceramic disk 26 is arranged both electrically and geometrically between the electrode 24 and the switching mechanism 11 in the interior of the housing 12.
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Fire-Detection Mechanisms (AREA)
- Amplifiers (AREA)
Claims (5)
- Commutateur avec un boîtier (12), qui reçoit un mécanisme de commutation (11) influencé par la température et qui comporte une première partie de boîtier (15), sur le fond intérieur (25) de laquelle est disposée une première électrode (24) reliée à un premier raccord extérieur (23), ainsi qu'une deuxième partie de boîtier (14), qui ferme la première partie de boîtier (15) et qui comporte une deuxième électrode (20) reliée à un deuxième raccord extérieur (22), le mécanisme de commutation (11) établissant en fonction de sa température une liaison électroconductrice entre la première et la deuxième électrode (24, 20), une résistance série (34) étant disposée dans le boîtier (12) géométriquement et électriquement entre le mécanisme de commutation (11) et une des deux électrodes (24, 20) et un support céramique (26) étant prévu, lequel est disposé sur une des deux électrodes (24, 20) en étant orienté vers le mécanisme de commutation (11) et porte la résistance série (34) dont une extrémité est reliée à l'électrode (24) et dont l'autre extrémité est reliée à un contact complémentaire (27) pour le mécanisme de commutation (11), caractérisé en ce que la première partie de boîtier (15) est réalisée dans un matériau isolant, dans lequel la première électrode (24) est maintenue de manière imperdable, la première électrode (24) comporte une face plane (25) orientée vers le mécanisme de commutation (11), sur laquelle est fixé le support céramique (26) et à laquelle est reliée électriquement la résistance série (34).
- Commutateur selon la revendication 1, caractérisé en ce que le support céramique (26) comporte au moins un trou débouchant (28, 29) perforé de préférence au laser, à travers lequel ledit support est brasé contre l'électrode (24) et la résistance série (34) est reliée électriquement à celle-ci.
- Commutateur selon la revendication 1 ou 2, caractérisé en ce que la première électrode (24) est maintenue de manière imperdable dans la première partie de boîtier (15) par moulage ou surmoulage lors de la fabrication de la partie de boîtier (15), de telle sorte qu'elle fait partie intégrante de cette partie de boîtier (15).
- Commutateur selon la revendication 3, caractérisé en ce que la deuxième partie de boîtier (14) est une partie de fond (14) électroconductrice, dont le fond intérieur agit en tant que deuxième électrode (20).
- Commutateur selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le mécanisme de commutation (11) comporte une rondelle élastique (18) électroconductrice, qui porte un élément de contact (17) mobile et travaille contre un dispositif d'encliquetage (19) bimétallique, qui est posé à peu près au milieu sur l'élément de contact (17) mobile, la rondelle élastique (18) prenant appui avec son bord (21) sur une électrode (20) et l'élément de contact (17) mobile poussant contre l'autre électrode (24) lorsque le mécanisme de commutation (11) est en dessous de sa température de réaction.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19748589 | 1997-11-04 | ||
DE19748589A DE19748589C2 (de) | 1997-11-04 | 1997-11-04 | Schalter mit einem temperaturabhängigen Schaltwerk |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0915491A2 EP0915491A2 (fr) | 1999-05-12 |
EP0915491A3 EP0915491A3 (fr) | 1999-12-08 |
EP0915491B1 true EP0915491B1 (fr) | 2006-11-15 |
Family
ID=7847514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98117532A Expired - Lifetime EP0915491B1 (fr) | 1997-11-04 | 1998-09-16 | Interrupteur avec un mécanisme de commutation sensible à la température |
Country Status (6)
Country | Link |
---|---|
US (1) | US6091316A (fr) |
EP (1) | EP0915491B1 (fr) |
AT (1) | ATE345575T1 (fr) |
AU (1) | AU738423B2 (fr) |
DE (2) | DE19748589C2 (fr) |
ES (1) | ES2276442T3 (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU773747B2 (en) | 1999-10-27 | 2004-06-03 | Thermik Geratebau Gmbh | Connector |
CN1428806A (zh) * | 2001-12-07 | 2003-07-09 | 古河电气工业株式会社 | 热保护器 |
DE102004036117B4 (de) * | 2004-07-24 | 2006-12-14 | Tmc Sensortechnik Gmbh | Thermobimetallschalter |
DE102009030353B3 (de) * | 2009-06-22 | 2010-12-02 | Hofsaess, Marcel P. | Kappe für einen temperaturabhängigen Schalter sowie Verfahren zur Fertigung eines temperaturabhängigen Schalters |
DE102009039948A1 (de) * | 2009-08-27 | 2011-03-03 | Hofsaess, Marcel P. | Temperaturabhängiger Schalter |
GB2481240B (en) * | 2010-06-17 | 2017-04-12 | Otter Controls Ltd | Thermally responsive electric switches |
DE102011107110B4 (de) | 2011-07-12 | 2013-04-18 | Marcel P. HOFSAESS | Verfahren zum Umgeben eines elektrischen Bauteils mit einem Schutzgehäuse sowie elektrisches Bauteil mit einem Schutzgehäuse |
US10615578B2 (en) | 2016-07-29 | 2020-04-07 | Karle Innovations Ltd. | Electrical equipment with additional compartment and wiring to account for temperature limitations of connected conductors |
DE102023102302B3 (de) | 2023-01-31 | 2024-03-28 | Marcel P. HOFSAESS | Temperaturabhängiger Schalter |
DE102023102301B3 (de) | 2023-01-31 | 2024-03-28 | Marcel P. HOFSAESS | Temperaturabhängiger Schalter und Verfahren zu dessen Herstellung |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2121802C3 (de) * | 1971-05-03 | 1974-10-24 | Thermik-Geraetebau Gmbh + Co, 7530 Pforzheim | Temperaturwächter |
DE2759251B2 (de) * | 1977-12-31 | 1981-04-23 | Behr-Thomson Dehnstoffregler Gmbh, 7014 Kornwestheim | Zweistufen-Temperaturschalter |
DE8806648U1 (fr) * | 1988-05-20 | 1989-06-22 | Hofsaess, Peter, 7530 Pforzheim, De | |
DE4142716C2 (de) * | 1991-12-21 | 1997-01-16 | Microtherm Gmbh | Thermoschalter |
JPH05282977A (ja) * | 1992-03-30 | 1993-10-29 | Texas Instr Japan Ltd | 過電流保護装置 |
DE9214940U1 (fr) * | 1992-11-03 | 1992-12-17 | Thermik Geraetebau Gmbh, 7530 Pforzheim, De | |
DE4428226C1 (de) * | 1994-08-10 | 1995-10-12 | Thermik Geraetebau Gmbh | Temperaturwächter |
DE19527254C2 (de) * | 1995-07-26 | 2000-01-20 | Thermik Geraetebau Gmbh | Temperaturwächter |
DE19604939C2 (de) * | 1996-02-10 | 1999-12-09 | Marcel Hofsaes | Schalter mit einem temperaturabhängigen Schaltwerk |
DE19609310C2 (de) * | 1996-03-09 | 1999-07-15 | Thermik Geraetebau Gmbh | Schalter mit einem temperaturabhängigen Schaltwerk |
-
1997
- 1997-11-04 DE DE19748589A patent/DE19748589C2/de not_active Expired - Fee Related
-
1998
- 1998-09-16 DE DE59813802T patent/DE59813802D1/de not_active Expired - Lifetime
- 1998-09-16 AT AT98117532T patent/ATE345575T1/de active
- 1998-09-16 EP EP98117532A patent/EP0915491B1/fr not_active Expired - Lifetime
- 1998-09-16 ES ES98117532T patent/ES2276442T3/es not_active Expired - Lifetime
- 1998-10-30 US US09/183,534 patent/US6091316A/en not_active Expired - Fee Related
- 1998-11-02 AU AU90526/98A patent/AU738423B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
AU738423B2 (en) | 2001-09-20 |
EP0915491A2 (fr) | 1999-05-12 |
DE19748589C2 (de) | 1999-12-09 |
ES2276442T3 (es) | 2007-06-16 |
DE19748589A1 (de) | 1999-05-20 |
DE59813802D1 (de) | 2006-12-28 |
EP0915491A3 (fr) | 1999-12-08 |
US6091316A (en) | 2000-07-18 |
AU9052698A (en) | 1999-05-27 |
ATE345575T1 (de) | 2006-12-15 |
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