EP0931321A1 - Contact assembly with a posistor - Google Patents

Contact assembly with a posistor

Info

Publication number
EP0931321A1
EP0931321A1 EP97909157A EP97909157A EP0931321A1 EP 0931321 A1 EP0931321 A1 EP 0931321A1 EP 97909157 A EP97909157 A EP 97909157A EP 97909157 A EP97909157 A EP 97909157A EP 0931321 A1 EP0931321 A1 EP 0931321A1
Authority
EP
European Patent Office
Prior art keywords
contact
group according
points
contact group
elements
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
EP97909157A
Other languages
German (de)
French (fr)
Other versions
EP0931321B1 (en
Inventor
Bernd Gruhn
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.)
TDK Electronics AG
Original Assignee
Siemens Matsushita Components GmbH and Co KG
Epcos AG
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 Siemens Matsushita Components GmbH and Co KG, Epcos AG filed Critical Siemens Matsushita Components GmbH and Co KG
Publication of EP0931321A1 publication Critical patent/EP0931321A1/en
Application granted granted Critical
Publication of EP0931321B1 publication Critical patent/EP0931321B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/1406—Terminals or electrodes formed on resistive elements having positive temperature coefficient
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/01—Mounting; Supporting
    • H01C1/014—Mounting; Supporting the resistor being suspended between and being supported by two supporting sections

Definitions

  • the invention relates to a contact group for semiconductor resistors such as PTC thermistors.
  • PTC resistors motor start PTC resistors
  • the resistance of the PTC thermistor increases from a few ohms, for example 10 ⁇ in a cold state in a very short time, often within a few seconds in relation to the cold state to very high resistance values, for example in the order of 20,000 ⁇ lie.
  • PTC thermistors form cracks that can lead to breakage and thus destruction of the PTC thermistor.
  • the current supply in such PTC thermistors is preferably via spring contacts which bear on the PTC thermistor with a certain pressure, there is a risk that, if the PTC thermistor breaks, for example the current-carrying spring contacts come into contact with one another and thereby come into contact A short circuit occurs or that more or fewer large fragments of a broken PTC thermistor are still in contact with one another and flow over the fragments in contact on the order of several amperes.
  • the object of the invention is therefore to improve a contact group for semiconductor resistors, such as PTC thermistors, in such a way that the highest possible level of security is ensured.
  • this object is achieved by a contact group for semiconductor resistors, such as PTC thermistors, by the features of claim 1.
  • Advantageous further developments are the subject of the subclaims.
  • leakage currents could also result from the fact that individual fragments of the broken PTC thermistor are still in contact with one another, as a result of which the latter is heated accordingly and consequently smoldering fires can occur, in the worst case even fires.
  • the contact elements are preferably formed as one-piece elements from contact springs and preloaded parts to solve the problem described above.
  • corresponding forces are exerted on the component not only at the points at which the contact springs bear against the component, but also at the points at which the prestressed parts bear against the component.
  • a force is exerted by the prestressed parts in the direction of the electrical component at the points which are offset from the contact points on the opposite side, on which a force is exerted by means of the contact springs are. Since opposing forces thus act on the component at mutually offset locations, the component breaks at least into two fragments when cracks occur, such that the two fragments of the broken component are no longer in contact with one another. Therefore, no currents, especially no leakage currents, can occur and the occurrence of smoldering fires or fires is prevented.
  • a torque acts on each of the fragments when the component breaks. If the component breaks or breaks into individual pieces, this ensures that, on the one hand, no short circuit can occur between the contact springs and, on the other hand, no leakage currents between the components.
  • Fragments can occur because the individual fragments in the contact group according to the invention are additionally separated from one another by the interaction of the asymmetrical contact elements.
  • the pretensioned parts of the contact elements are electrically insulated at least at their free ends.
  • the locations on the PTC thermistor can which the prestressed parts rest against, be electrically isolated.
  • Fig.l is a schematic view of an embodiment of a contact group according to the invention using the example of a PTC thermistor provided in an engine starting device;
  • FIG 3 shows a schematic view of a known contact group on a PTC thermistor provided in an engine starting device.
  • Fig.l is a schematic view of a contact group on
  • Example of a PTC thermistor 3 provided in an engine starting device is shown.
  • the PTC thermistor 3 is held in a housing 1 via receptacles 2a and 2b. Furthermore, two, for example, U-shaped contact holders 6a and 6b are provided in the housing 1.
  • a contact element 5a or 5b is attached to each of the contact holders 6a and 6b.
  • Each of the contact elements 5a and 5b has two resilient areas 51a and 52a or 51b and 52b, one spring area 51a or 51b serving as a contact spring and the other resilient area 52a or 52b serving as a prestressed part.
  • Contact elements 5a and 5b, which have contact springs 51a, 51b and prestressed parts 52a, 52b, are each made in one piece.
  • Both contact elements 5a and 5b are biased so that each of the resilient areas 51a, 52a and 51b, 52b, i.e. the contact springs 51a, 51b or the prestressed parts 52a, 52b, on the PTC thermistor 3 forces are exerted.
  • the forces exerted by 51a, 51b act on the PTC thermistor 3 at contact points 3a, 3b.
  • the forces exerted by the prestressed parts 52a and 52b act on the PTC thermistor 3 at the insulated points 4a and 4b in the embodiment shown in FIG.
  • the points 4a and 4b are electrically isolated, for example by mica.
  • FIG. 2 shows the contact group shown in FIG. 1 after the PTC thermistor 3 has broken. If the PTC thermistor 3 breaks, for example, along broken edges 30 ', the two PTC thermistor fragments 3' and 3 "are rotated, for example, into the position shown in FIG. 2. A corresponding rotation is brought about by the fact that the PTC thermistor fragments 3 'and 3 "The resilient areas 51a and 52b or 52a and 51b each exert forces at contact points 3a, 4b and 3b, 4a which are offset from one another. Therefore, the thermistor fragments 3 'and 3 act "clockwise moments M' and M" in a clockwise direction, which is indicated by the arrows entered at the reference symbols M 'and M ".
  • the receptacles 2a and 2b which serve as holders for the PTC thermistor 3, are designed such that they also break if the PTC thermistor 3 breaks, and thus rotation of the two PTC thermistor fractions 3 'and 3 "is not impeded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Thermistors And Varistors (AREA)
  • Thermally Actuated Switches (AREA)
  • Non-Adjustable Resistors (AREA)
  • Adjustable Resistors (AREA)
  • Semiconductor Integrated Circuits (AREA)
  • Electronic Switches (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Organic Insulating Materials (AREA)
  • Inert Electrodes (AREA)
  • Details Of Resistors (AREA)

Abstract

The present invention relates to a contact assembly for semiconductor resistors, consisting of a set of contact elements (5a, 5b) asymmetrically arranged so that they lean, staggered in relation to each other, against the opposite side surfaces of an electrical structural member.

Description

Beschreibungdescription
Kontaktgruppe für Halbleiter-Widerstände, wie KaltleiterContact group for semiconductor resistors, such as PTC thermistors
Die Erfindung betrifft eine Kontaktgruppe für Halbleiter- Widerstände wie Kaltleiter.The invention relates to a contact group for semiconductor resistors such as PTC thermistors.
Beispielsweise sind bei Kühlaggregaten von Kühlschränken deren Elektromotoren, auf deren Abtriebswelle unmittelbar der Kühlkompressor sitzt, sogenannte Motorstart-Kaltleiter (PTC- Widerstände) vorgeschaltet. Jeweils in der Anlauf- oder Startphase des Elektromotors steigt der Widerstand des Kaltleiters von einigen Ohm, beispielsweise 10Ω in kaltem Zustand in sehr kurzer Zeit, oftmals innerhalb weniger Sekunden bezogen auf den kalten Zustand auf sehr hohe Widerstandwerte, die beispielsweise in der Größenordnung von 20 000Ω liegen.For example, in cooling units of refrigerators, their electric motors, on whose output shaft the cooling compressor is located, are connected upstream of so-called motor start PTC resistors (PTC resistors). In the start-up or start-up phase of the electric motor, the resistance of the PTC thermistor increases from a few ohms, for example 10Ω in a cold state in a very short time, often within a few seconds in relation to the cold state to very high resistance values, for example in the order of 20,000Ω lie.
Aufgrund der in kurzer Zeit erfolgenden, sehr starken Zunahme des Widerstandswerts des Kaltleiters wird dieser jedesmal sehr stark erhitzt. Aufgrund dieser sich in verhältnismäßig kurzer Zeit häufig wiederholenden Temperaturzunahme, insbesondere bei Kühlaggregaten vorgeschalteten Kaltleitern sind diese bei ungünstigen Umgebungsbedingungen, wie beispielsweise Öl oder ölhaltige Atmosphäre einer thermischen Alterung unterworfen mit der Folge, daß sich gelegentlich bei denDue to the very rapid increase in the resistance value of the PTC thermistor, it is heated very strongly each time. Because of this temperature increase, which often repeats itself in a comparatively short time, especially in the case of cooling units connected upstream PTC thermistors, they are subject to thermal aging in unfavorable ambient conditions, such as, for example, oil or an oil-containing atmosphere, with the result that occasionally the
Kaltleitern Risse bilden, die zu Brüchen und damit zu einer Zerstörung des Kaltleiters führen können.PTC thermistors form cracks that can lead to breakage and thus destruction of the PTC thermistor.
In Fig. 3 ist ein solcher Motorstart-Kaltleiter 3' in einem Gehäuse 1 über Halterungen 2a, 2b gehalten. Auf gegenüberliegenden Seiten des Kaltleiters 3' sind im allgemeinen elektrische Anschlüsse in der Weise vorgesehen, daß der Strom vorzugsweise über Federkontakte 5a' und 5b' zugeführt wird, die an einander genau gegenüberliegenden Stellen 3a', 3a" und 3b', 3b" gegen die Seitenflächen des Kaltleiters 3' drücken. Auf diese Weise ist der elektrische Kontakt zwischen dem Kaltleiter 3' und den Anschlüssen 6a' und 6b' hergestellt. Da, wie vorstehend beschrieben, die Stromzuführung bei derartigen Kaltleitern, vorzugsweise über Federkontakte erfolgt, die mit einem gewissen Druck an dem Kaltleiter anliegen, besteht die Gefahr, daß bei einem Bruch des Kaltleiters bei- spielsweise die stromführenden Federkontakte in Kontakt miteinander kommen und dadurch ein Kurzschluß entsteht oder daß mehr oder wenige große Bruchstücke eines gebrochenen Kaltleiters noch Kontakt miteinander haben und über die miteinander in Kontakt stehenden Bruchstücke in der Größenordnung von mehreren Ampere fließen.In Fig. 3, such an engine start PTC thermistor 3 'is held in a housing 1 via brackets 2a, 2b. On opposite sides of the PTC thermistor 3 ', electrical connections are generally provided in such a way that the current is preferably supplied via spring contacts 5a' and 5b ', which at exactly opposite points 3a', 3a "and 3b ', 3b" against the Press the side surfaces of the PTC thermistor 3 '. In this way, the electrical contact between the PTC thermistor 3 'and the connections 6a' and 6b 'is established. Since, as described above, the current supply in such PTC thermistors is preferably via spring contacts which bear on the PTC thermistor with a certain pressure, there is a risk that, if the PTC thermistor breaks, for example the current-carrying spring contacts come into contact with one another and thereby come into contact A short circuit occurs or that more or fewer large fragments of a broken PTC thermistor are still in contact with one another and flow over the fragments in contact on the order of several amperes.
Auf diese Weise können bei einem Brechen eines solchen Motor- start-Kaltleiterε durchaus Schwelbrände ausgelöst werden, die unter Umständen einen Kühlεchrankbrand zur Folge haben kön- nen.In this way, if such a motor start PTC thermistor breaks, smoldering fires can be triggered, which under certain circumstances can result in a refrigerator fire.
Aufgabe der Erfindung ist es daher, eine Kontaktgruppe für Halbleiter-Widerstände, wie Kaltleiter, dahingehend zu verbessern, daß eine möglichst hohe Sicherheit gewährleistet ist.The object of the invention is therefore to improve a contact group for semiconductor resistors, such as PTC thermistors, in such a way that the highest possible level of security is ensured.
Gemäß der Erfindung ist diese Aufgabe durch eine Kontaktgruppe für Halbleiter-Widerstände, wie Kaltleiter durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche.According to the invention, this object is achieved by a contact group for semiconductor resistors, such as PTC thermistors, by the features of claim 1. Advantageous further developments are the subject of the subclaims.
Bei der erfindungsgemäßen Kontaktgruppe für Halbleiter- Widerstände, wie Kaltleiter, insbesondere für Kühlaggregate von Kühlschränken sind deren Kontaktelemente asy etrisch aus- gebildet und bezüglich des elektrischen Bauelements so angeordnet, daß sie an diesem gegeneinander versetzt an gegenüberliegenden Seitenflächen anliegen. Gemäß der Erfindung wirken somit über die Kontaktelemente an den zueinander versetzt angeordneten Kontaktstellen Kräfte auf das elektrische Bauelement. Dadurch ist in vorteilhafter Weise erreicht, daß bei Brechen des Bauteils die an diesem anliegenden Kontaktelemente nicht in Kontakt miteinander kommen können und somit auch kein Kurzschluß hervorgerufen werden kann.In the case of the contact group according to the invention for semiconductor resistors, such as PTC thermistors, in particular for cooling units of refrigerators, their contact elements are designed asymetrically and are arranged with respect to the electrical component in such a way that they abut against one another on opposite side faces. According to the invention, forces therefore act on the electrical component via the contact elements at the contact points which are arranged offset from one another. It is thereby advantageously achieved that when the component breaks, the contact elements lying against it cannot come into contact with one another and thus no short circuit can be caused.
Durch Laboruntersuchungen konnte nachgewiesen werden, daß insbesondere Heiß-(NTC) und Kaltleiter (PTC) (bei thermischer Überlastung) nicht zu einfachen Querbrüchen neigen, sondern vielmehr in eine große Anzahl von Stücken zerfallen. Wird nun beispielsweise einem Motorstart-Kaltleiter über an diesem anliegende Kontaktelemente Strom zugeführt, so ist bei Verwendung der erfindungsgemäßen Kontaktgruppe die Möglichkeit eines Kurzschlusses nahezu ausgeschlossen.Laboratory tests have shown that especially hot (NTC) and PTC (PTC) (in the event of thermal overload) do not tend to break easily, but rather disintegrate into a large number of pieces. If, for example, current is now supplied to an engine start PTC thermistor via contact elements connected to it, the possibility of a short circuit is almost excluded when using the contact group according to the invention.
Allerdings könnten beispielsweise, wie vorstehend bereits ausgeführt, Kriechströme auch dadurch entstehen, daß einzelne Bruchstücke des zerbrochenen Kaltleiters noch Kontakt miteinander haben, wodurch dieser entsprechend erwärmt wird und es somit doch wieder zu Schwelbränden, schlimmstenfalls sogar zu Bränden kommen kann.However, for example, as already stated above, leakage currents could also result from the fact that individual fragments of the broken PTC thermistor are still in contact with one another, as a result of which the latter is heated accordingly and consequently smoldering fires can occur, in the worst case even fires.
Gemäß der Erfindung sind zur Lösung der vorstehend geschilderte Problematik die Kontaktelemente vorzugsweise als einteilige Elemente aus Kontaktfedern und vorgespannten Teilen gebildet. Dadurch werden nicht nur an den Stellen, an denen die Kontaktfedern an dem Bauelement anliegen, sondern auch an den Stellen, an welchen die vorgespannten Teile an dem Bauelement anliegen, auf dieses entsprechende Kräfte ausgeübt.According to the invention, the contact elements are preferably formed as one-piece elements from contact springs and preloaded parts to solve the problem described above. As a result, corresponding forces are exerted on the component not only at the points at which the contact springs bear against the component, but also at the points at which the prestressed parts bear against the component.
Hierbei wird aufgrund der asymmetrischen Ausbildung der erfindungsgemäßen Kontaktelemente durch die vorgespannten Teile jeweils eine Kraft in Richtung des elektrischen Bauelements an den Stellen ausgeübt, welche zu den Kontaktstellen auf der jeweils gegenüberliegenden Seite, an welcher mittels der Kon- taktfedern eine Kraft ausgeübt wird, versetzt angeordnet sind. Da somit an gegeneinander versetzten Stellen entgegengesetzt wirkende Kräfte auf das Bauteil einwirken, zerbricht das Bauteil bereits bei Auftreten von Rissen zumindest in zwei Bruchstücke dergestalt, daß die zwei Bruchstücke des zerbro- chenen Bauteils keinen Kontakt mehr miteinander haben. Daher können keine Strome, insbesondere keine Kriechströme mehr auftreten und somit ist das Entstehen von Schwelbränden bzw. Bränden unterbunden.Due to the asymmetrical design of the contact elements according to the invention, a force is exerted by the prestressed parts in the direction of the electrical component at the points which are offset from the contact points on the opposite side, on which a force is exerted by means of the contact springs are. Since opposing forces thus act on the component at mutually offset locations, the component breaks at least into two fragments when cracks occur, such that the two fragments of the broken component are no longer in contact with one another. Therefore, no currents, especially no leakage currents, can occur and the occurrence of smoldering fires or fires is prevented.
Somit wirkt gemäß der Erfindung bei einem Brechen des Bauelements auf jedes der Bruchstücke ein Drehmoment. Dadurch ist bei einem Brechen oder bei einem Zerfallen des Bauelements in einzelne Stücke sichergestellt, daß einerseits zwischen den Kontaktfedern kein Kurzschluß entstehen kann, und anderer- seits auch keine Kriechströme zwischen den Bauelement-Thus, according to the invention, a torque acts on each of the fragments when the component breaks. If the component breaks or breaks into individual pieces, this ensures that, on the one hand, no short circuit can occur between the contact springs and, on the other hand, no leakage currents between the components.
Bruchstücken auftreten können, da die einzelnen Bruchstücke bei der erfmdungsgemaßen Kontaktgruppe durch das Zusammenwirken der asymmetrischen Kontaktelemente die vorgespannten Teile zusatzlich noch weiter voneinander getrennt werden.Fragments can occur because the individual fragments in the contact group according to the invention are additionally separated from one another by the interaction of the asymmetrical contact elements.
Dies wird gemäß der Erfindung zusätzlich noch dadurch unterstutzt, daß die Stellen an dem Bauelement, an welchen die Kontaktfedern bzw. die vorgespannten Teile anliegen, in einem möglichst großen Abstand voneinander angeordnet sind. Diese Maßnahme, die einzelnen Anlagestellen, an denen Kraft auf das Bauelement ausgeübt wird, soweit wie möglich voneinander anzuordnen, stellt einen weiteren Beitrag dar, daß bei einem Brechen des Bauelements ein Inkontaktkommen der verbleibenden Bruchteile mit sehr hoher Wahrscheinlichkeit von vornherein auszuschließen ist.This is additionally supported according to the invention in that the locations on the component at which the contact springs or the prestressed parts are in contact are arranged as far apart as possible. This measure of arranging the individual contact points at which force is exerted on the component as far as possible from one another represents a further contribution that if the component breaks, the remaining fractions can very likely be prevented from coming into contact from the outset.
Um die Sicherheit noch weiter zu erhohen, sind gemäß einer bevorzugten Weiterbildung der Erfindung die vorgespannten Teile der Kontaktelemente mindestens an ihren freien Enden elektrisch isoliert. Statt die freien Enden der vorgespannten Teile zu isolieren, können gemäß einer anderen bevorzugten Ausbildung der Erfindung die Stellen an dem Kaltleiter, an welchem die vorgespannten Teile anliegen, elektrisch isoliert ausgeführt sein.In order to further increase security, according to a preferred development of the invention, the pretensioned parts of the contact elements are electrically insulated at least at their free ends. Instead of isolating the free ends of the prestressed parts, according to another preferred embodiment of the invention, the locations on the PTC thermistor can which the prestressed parts rest against, be electrically isolated.
Durch Verwenden der erfindungsgemäßen Kontaktgruppe für Mo- torstart-Kaltleiter, ist insbesondere die Sicherheit beim Einsatz solcher Kaltleiter bei Kühlschrankaggregaten ganze wesentlich verbessert.By using the contact group according to the invention for motor start PTC thermistors, in particular the safety when using such PTC thermistors in refrigerator units is considerably improved.
Nachfolgend wird die Erfindung anhand einer bevorzugten Aus- führungsform unter Bezugnahme auf die anliegenden Zeichnungen im einzelnen erläutert. Es zeigen:In the following, the invention is explained in detail on the basis of a preferred embodiment with reference to the attached drawings. Show it:
Fig.l eine schematische Ansicht einer Ausführungsform einer Kontaktgruppe gemäß der Erfindung am Beispiel eines in einer Motorstarteinrichtung vorgesehenen Kaltleiters;Fig.l is a schematic view of an embodiment of a contact group according to the invention using the example of a PTC thermistor provided in an engine starting device;
Fig.2 die in der Fig.l dargestellte Kontaktgruppe nach einem Bruch des Kaltleiters, und2 shows the contact group shown in Fig.l after a break in the PTC thermistor, and
Fig.3 eine schematische Ansicht einer bekannten Kontaktgruppe an einem in einer Motorstarteinrichtung vorgesehenen Kaltleiter.3 shows a schematic view of a known contact group on a PTC thermistor provided in an engine starting device.
In Fig.l ist eine schematische Ansicht einer Kontaktgruppe amIn Fig.l is a schematic view of a contact group on
Beispiel eines in einer Motorstarteinrichtung vorgesehenen Kaltleiters 3 dargestellt. Der Kaltleiter 3 ist über Aufnahmen 2a und 2b in einem Gehäuse 1 gehaltert. Ferner sind in dem Gehäuse 1 zwei beispielsweise U-förmige Kontakthalterun- gen 6a und 6b vorgesehen.Example of a PTC thermistor 3 provided in an engine starting device is shown. The PTC thermistor 3 is held in a housing 1 via receptacles 2a and 2b. Furthermore, two, for example, U-shaped contact holders 6a and 6b are provided in the housing 1.
An den Kontakthalterungen 6a und 6b ist jeweils ein Kontaktelement 5a bzw. 5b angebracht. Jedes der Kontaktelemente 5a und 5b weist zwei federnde Bereiche 51a und 52a bzw. 51b und 52b auf, wobei der eine federne Bereich 51a bzw. 51b als Kontaktfeder und der andere federnde Bereich 52a bzw. 52b als vorgespanntes Teil dient . Ferner sind gemäß der Erfindung die Kontaktelemente 5a und 5b, die Kontaktfedern 51a, 51b und vorgespannte Teile 52a, 52b aufweisen, jeweils einteilig ausgeführt .A contact element 5a or 5b is attached to each of the contact holders 6a and 6b. Each of the contact elements 5a and 5b has two resilient areas 51a and 52a or 51b and 52b, one spring area 51a or 51b serving as a contact spring and the other resilient area 52a or 52b serving as a prestressed part. Furthermore, according to the invention Contact elements 5a and 5b, which have contact springs 51a, 51b and prestressed parts 52a, 52b, are each made in one piece.
Beide Kontaktelemente 5a und 5b sind so vorgespannt, daß von jedem der federnden Bereiche 51a, 52a bzw. 51b, 52b, d.h. der Kontaktfedern 51a, 51b bzw. der vorgespannten Teile 52a, 52b, auf den Kaltleiter 3 Kräfte ausgeübt werden. Die von den 51a, 51b ausgeübten Kräfte wirken an Kontaktstellen 3a, 3b auf den Kaltleiter 3. Die von den vorgespannten Teilen 52a und 52b ausgeübten Kräfte wirken in der in Fig.l dargestellten Ausführung an isolierten Stellen 4a bzw. 4b auf den Kaltleiter 3. Hierbei sind die Stellen 4a bzw. 4b beispielsweise durch Glimmer elektrisch isoliert.Both contact elements 5a and 5b are biased so that each of the resilient areas 51a, 52a and 51b, 52b, i.e. the contact springs 51a, 51b or the prestressed parts 52a, 52b, on the PTC thermistor 3 forces are exerted. The forces exerted by 51a, 51b act on the PTC thermistor 3 at contact points 3a, 3b. The forces exerted by the prestressed parts 52a and 52b act on the PTC thermistor 3 at the insulated points 4a and 4b in the embodiment shown in FIG. Here, the points 4a and 4b are electrically isolated, for example by mica.
In Fig.2 ist die in Fig.l wiedergegebene Kontaktgruppe nach einem Bruch des Kaltleiters 3 dargestellt. Wenn der Kaltleiter 3 beispielsweise entlang Bruchkanten 30' bricht, werden die beiden Kaltleiter-Bruchεtücke 3' und 3" beispielsweise in die in Fig.2 dargestellt Lage gedreht. Eine entsprechende Drehung wird dadurch bewirkt, daß auf die Kaltleiter- Bruchstücke 3' und 3" von den federnden Bereichen 51a und 52b bzw. 52a und 51b jeweils Kräfte an Anlagestellen 3a, 4b und 3b, 4a ausgeübt werden, die gegeneinander versetzt sind. Da- her wirken auf die Kaltleiter-Bruchstücke 3' und 3" Drehmomente M' bzw. M" im Uhrzeigersinn, was durch bei den Bezugszeichen M' und M" eingetragene Pfeile angezeigt ist.2 shows the contact group shown in FIG. 1 after the PTC thermistor 3 has broken. If the PTC thermistor 3 breaks, for example, along broken edges 30 ', the two PTC thermistor fragments 3' and 3 "are rotated, for example, into the position shown in FIG. 2. A corresponding rotation is brought about by the fact that the PTC thermistor fragments 3 'and 3 "The resilient areas 51a and 52b or 52a and 51b each exert forces at contact points 3a, 4b and 3b, 4a which are offset from one another. Therefore, the thermistor fragments 3 'and 3 act "clockwise moments M' and M" in a clockwise direction, which is indicated by the arrows entered at the reference symbols M 'and M ".
Ferner sind die Aufnahmen 2a und 2b, die als Halterung des Kaltleiters 3 dienen, so ausgelegt, daß diese bei einem Bruch des Kaltleiters 3 ebenfalls brechen und somit ein Verdrehen der beiden Kaltleiter-Bruchteile 3' und 3" nicht behindert wird. Furthermore, the receptacles 2a and 2b, which serve as holders for the PTC thermistor 3, are designed such that they also break if the PTC thermistor 3 breaks, and thus rotation of the two PTC thermistor fractions 3 'and 3 "is not impeded.

Claims

Patentansprüche claims
1. Kontaktgruppe für Halbleiter-Widerstände, wie Kaltleiter, d a d u r c h g e k e n n z e i c h n e t, daß deren Kon- taktelemente (5a, 5b) as-y-mmetrisch ausgebildet sind, so daß sie an einander gegenüberliegenden Seitenflächen eines elektrischen Bauelements (3) gegeneinander versetzt an dem Bauelement (3) anliegen.1. Contact group for semiconductor resistors, such as PTC thermistors, characterized in that their contact elements (5a, 5b) are designed as-y-mmetric, so that they are offset from one another on the component (on opposite side faces of an electrical component (3) on the component ( 3) concern.
2. Kontaktgruppe nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß über die Kon- taktelemente (5a, 5b) an gegeneinander versetzten Kontaktstellen (3a, 3b) Kräfte auf das elektrische Bauelement (3) wirken.2. Contact group according to claim 1, so that forces act on the electrical component (3) via the contact elements (5a, 5b) at mutually offset contact points (3a, 3b).
3. Kontaktgruppe nach Anspruch 2, d ad u r c h g e k e n n z e i c h n e t, daß die Kontaktstellen (3a, 3b) an dem elektrischen Bauelement (3) in einem möglichst großen Abstand voneinander angeordnet sind.3. Contact group according to claim 2, so that the contact points (3a, 3b) on the electrical component (3) are arranged as far apart as possible from one another.
4. Kontaktgruppe nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t, daß die Kontakt- elemente aus Kontaktfedern (51a, 51b) und vorgespannten Teilen (52a, 52b) gebildet sind.4. Contact group according to one of the preceding claims, so that the contact elements are formed from contact springs (51a, 51b) and prestressed parts (52a, 52b).
5. Kontaktgruppe nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t, daß die vorgespannten Teile (52a, 52b) jeweils eine Kraft in Richtung des elektrischen Bauelements (3) jeweils an den Stellen (4a, 4b) ausüben, welche zu den Kontaktstellen (3a, 3b) auf der gegenüberliegenden Seite, an welcher mittels der Kontaktfedern (51a, 51b) eine Kraft ausgeübt wird, versetzt angeordnet sind.5. Contact group according to one of the preceding claims, characterized in that the prestressed parts (52a, 52b) each exert a force in the direction of the electrical component (3) at the points (4a, 4b) which lead to the contact points (3a, 3b ) on the opposite side, on which a force is exerted by means of the contact springs (51a, 51b), are arranged offset.
6. Kontaktgruppe nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t, daß die Kontakt- elemente (5a, 5b) , die aus den Kontaktfedern (51a, 51b) und den vorgespannten Teilen (52a, 52b) bestehen, einteilige Elemente sind.6. Contact group according to one of the preceding claims, characterized in that the contact elements (5a, 5b), which consist of the contact springs (51a, 51b) and the prestressed parts (52a, 52b), are one-piece elements.
7. Kontaktgruppe nach einem der Ansprüche 4 bis 6, d a - d u r c h g e k e n n z e i c h n e t, daß die vorgespannten Teile (52a, 52b) der Kontaktelemente (5a, 5b) mindestens an ihren freien Enden elektrisch isoliert sind.7. Contact group according to one of claims 4 to 6, d a - d u r c h g e k e n n z e i c h n e t that the prestressed parts (52a, 52b) of the contact elements (5a, 5b) are electrically insulated at least at their free ends.
8. Kontaktgruppe nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t, daß die Stellen (4a, 4b) an dem elektrischen Bauelement (3), an denen die vorgespannten Teile (52a, 52b) anliegen, elektrisch isoliert ausgeführt sind.8. Contact group according to one of the preceding claims, so that the points (4a, 4b) on the electrical component (3), at which the prestressed parts (52a, 52b) rest, are designed to be electrically insulated.
9. Verwenden einer Kontaktgruppe nach einem der Ansprüche 1 bis 8 bei Motorstart-Kaltleitern in Kühlaggregaten von Kühlschränken. 9. Use of a contact group according to one of claims 1 to 8 in engine start PTC thermistors in cooling units of refrigerators.
EP97909157A 1996-09-20 1997-09-18 Contact assembly with a posistor Expired - Lifetime EP0931321B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19638631 1996-09-20
DE19638631A DE19638631C2 (en) 1996-09-20 1996-09-20 Contact group for semiconductor resistors, such as PTC thermistors
PCT/DE1997/002118 WO1998012713A1 (en) 1996-09-20 1997-09-18 Contact assembly for semiconductor resistors such as posistors

Publications (2)

Publication Number Publication Date
EP0931321A1 true EP0931321A1 (en) 1999-07-28
EP0931321B1 EP0931321B1 (en) 2000-12-20

Family

ID=7806376

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97909157A Expired - Lifetime EP0931321B1 (en) 1996-09-20 1997-09-18 Contact assembly with a posistor

Country Status (12)

Country Link
US (1) US6160473A (en)
EP (1) EP0931321B1 (en)
JP (1) JP2001500672A (en)
KR (1) KR20010029532A (en)
CN (1) CN1231054A (en)
AT (1) ATE198242T1 (en)
BR (1) BR9712835A (en)
DE (2) DE19638631C2 (en)
DK (1) DK0931321T3 (en)
ES (1) ES2153185T3 (en)
MY (1) MY133747A (en)
WO (1) WO1998012713A1 (en)

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DE19824781B4 (en) * 1998-06-03 2005-05-19 Epcos Ag Electrical component, in particular switched-capacitor
JP3567854B2 (en) * 2000-05-18 2004-09-22 株式会社村田製作所 Electronic components
JP3811804B2 (en) * 2003-08-26 2006-08-23 株式会社センサータ・テクノロジーズジャパン Motor starting relay and electric compressor using the same
JP5274770B2 (en) * 2006-12-27 2013-08-28 東京パーツ工業株式会社 Small motor
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US8174354B2 (en) * 2010-07-23 2012-05-08 Sensata Technologies Massachusetts, Inc. Method and apparatus for control of failed thermistor devices
EP2578624A1 (en) * 2011-10-06 2013-04-10 Henkel Italia S.p.A. Polymeric PTC thermistors
CN103489551B (en) * 2012-06-14 2018-06-12 森萨塔科技（常州）有限公司 Electronic device
JP6366906B2 (en) * 2012-06-14 2018-08-01 センサータ テクノロジーズ マサチューセッツ インコーポレーテッド Electronic equipment
CN202615954U (en) * 2012-06-14 2012-12-19 森萨塔科技麻省公司 Electronic device
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Also Published As

Publication number Publication date
EP0931321B1 (en) 2000-12-20
DE19638631A1 (en) 1998-04-02
DK0931321T3 (en) 2001-02-12
CN1231054A (en) 1999-10-06
ES2153185T3 (en) 2001-02-16
DE59702793D1 (en) 2001-01-25
WO1998012713A1 (en) 1998-03-26
DE19638631C2 (en) 2002-09-26
BR9712835A (en) 1999-11-16
JP2001500672A (en) 2001-01-16
KR20010029532A (en) 2001-04-06
ATE198242T1 (en) 2001-01-15
MY133747A (en) 2007-11-30
US6160473A (en) 2000-12-12

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