EP0565998B1 - Appliance for contact clamping of electrical devices - Google Patents

Appliance for contact clamping of electrical devices Download PDF

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Publication number
EP0565998B1
EP0565998B1 EP93105689A EP93105689A EP0565998B1 EP 0565998 B1 EP0565998 B1 EP 0565998B1 EP 93105689 A EP93105689 A EP 93105689A EP 93105689 A EP93105689 A EP 93105689A EP 0565998 B1 EP0565998 B1 EP 0565998B1
Authority
EP
European Patent Office
Prior art keywords
caps
spring elements
ptc thermistor
tongues
free end
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
EP93105689A
Other languages
German (de)
French (fr)
Other versions
EP0565998A2 (en
EP0565998A3 (en
Inventor
Sigurd Dipl.-Ing. Greiderer
Bernd Dipl.-Ing. Gruhn
Robert Dipl.-Ing. Karner
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
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 filed Critical Siemens Matsushita Components GmbH and Co KG
Publication of EP0565998A2 publication Critical patent/EP0565998A2/en
Publication of EP0565998A3 publication Critical patent/EP0565998A3/en
Application granted granted Critical
Publication of EP0565998B1 publication Critical patent/EP0565998B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01C1/01—Mounting; Supporting
    • H01C1/014—Mounting; Supporting the resistor being suspended between and being supported by two supporting sections

Definitions

  • the present invention relates to a device for clamping contacting of electrical components according to the preamble of patent claim 1.
  • PTC thermistors with contact are known.
  • Such components consist in principle of a PTC thermistor, two spring elements which are resiliently engaged with the PTC thermistor disc, and a housing from which free ends of the spring elements protrude and thus form external connections for the component.
  • the housing is a closed design that holds the PTC thermistor and the spring elements in their position relative to one another.
  • the heat dissipation from the PTC thermistor is not optimal in such an embodiment of the component.
  • Patent Abstracts of Japan, Vol. 11, No.4 (E-468), January 7, 1987 and JP-A-61180588 disclose a device for clamping contacting of electrical components with a closed housing.
  • the present invention has for its object to provide a clamp contact for electrical components, in particular PTC thermistors, with improved heat dissipation to the outside.
  • FIGS. 1 and 2 show, two caps 2 and 3 made of insulating material, in particular of plastic, are initially provided for a clamping contact of a component disk of an electrical component.
  • the component disc is formed by a PTC thermistor disc 1, which has a circular cross section, as can be seen from FIG. 1.
  • the plastic caps 2 and 3 are generally cup-shaped and have an essentially U-shaped cross section, as can be seen from FIG. 2.
  • recesses 4 and 5 are provided, which serve in the manner to be explained in the following for receiving spring elements for the clamping contact.
  • Figure 3 shows an embodiment of such a spring element.
  • An elongated leg of this spring element 8 has in the area between its Ends an arcuate piece 10, the convex side of which rests under pressure on the PTC thermistor 1, as will be explained in more detail below.
  • a short free end 11 of the elongated leg of the spring element 8 is received by one of the two caps, namely the cap 2, during the clamping contact of the semiconductor wafer 1, while the other longer free end 12 of the elongated leg of the spring element 8 is received by the other cap 3 becomes.
  • Two tongues 9 at the ends of the arcuate piece 10 snap into the recesses 4 and 5 when the spring element 8 is inserted into the caps 2 and 3.
  • a pair of caps 2, 3 is formed such that one cap, namely the cap 2, has grooves 6, which, as seen in FIG. 2, are closed at the top of the cap 2. These grooves 6, closed on one side, serve to receive the free end 11 of two spring elements 8, the tongue 9 adjacent to this free end 11 being able to snap into a recess 4 of the cap 2.
  • grooves 7 are also provided in the cap 3, but these are open on both sides, so that a spring element 8 with its longer free end 12 can be inserted through these notes 7 such that the tongue 9 adjacent to this free end into the recess 5 can snap into place.
  • grooves 6 in the cap 2 are closed on one side. Like the grooves 7 in the cap 3, they can be open on both sides. This is not specifically shown in Figure 2.
  • FIGS. 4 and 5 show how two spring elements 8 in two caps 2 and 3 both electrically contact a PTC thermistor 1 and hold it mechanically between the caps 2 and 3 by clamping.
  • FIG. 5 specifically shows how the curved pieces 10 of the two spring elements 8 press with their convex side against the semiconductor wafer 1 and thus hold them mechanically in their position between the caps 2 and 3.
  • the arcuate piece 10 can be made wider than the free ends (in FIG. 4 the free end 12 is visible), as a result of which the contact surface on the PTC thermistor disk 1 is sufficiently large to ensure secure clamping .
  • the longer free ends 12 of the spring elements 8 simultaneously serve as electrical external connections for the PTC thermistor component, which is formed by the PTC thermistor pill 1, the caps 2 and 3 and the spring elements 8.
  • the caps 2, 3 Since only a part of the PTC thermistor 1 is covered by the caps 2, 3 and the contacting areas of the spring elements in the terminal contacting according to the invention, a significantly better heat dissipation is achieved compared to embodiments with closed housings.
  • the caps can also have shapes that differ from the shape shown in the figures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Thermistors And Varistors (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Details Of Resistors (AREA)

Abstract

PTC thermistor terminal contact-making device having a holder consisting of caps (2, 3) containing a pair of recesses (4, 5) and having spring elements (8) which have tongues which are inserted into the caps (2, 3), which tongues engage in the recesses (4, 5) and hence hold the PTC thermistor disc (1) and the caps (2, 3) in position with respect to one another and at the same time make electrical contact with the PTC thermistor disc (1). <IMAGE>

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zur Klemmkontaktierung von elektrischen Bauelementen nach dem Oberbegriff des Patentanspruchs 1.The present invention relates to a device for clamping contacting of electrical components according to the preamble of patent claim 1.

Aus dem Siemens-Datenbuch 1987/88 Kaltleiter, Seiten 130 bis 135 sind klemmkontaktierte Kaltleiter bekannt. Derartige Bauelemente bestehen im Prinzip aus einer Kaltleiterscheibe, zwei mit der Kaltleiterscheibe federnd in Eingriff stehenden Federelementen sowie einem Gehäuse, aus dem freie Enden der Federelemente herausragen und damit äußere Anschlüsse für das Bauelement bilden. Beim Gehäuse handelt es sich um eine geschlossene Bauform, welche die Kaltleiterscheibe sowie die Federelemente in ihrer Lage zueinander hält.From the Siemens data book 1987/88 PTC thermistor, pages 130 to 135, PTC thermistors with contact are known. Such components consist in principle of a PTC thermistor, two spring elements which are resiliently engaged with the PTC thermistor disc, and a housing from which free ends of the spring elements protrude and thus form external connections for the component. The housing is a closed design that holds the PTC thermistor and the spring elements in their position relative to one another.

Da das Gehäuse allseitig geschlossen ist, ist bei einer solchen Ausführungsform des Bauelementes die Wärmeabfuhr von der Kaltleiterscheibe nicht optimal.Since the housing is closed on all sides, the heat dissipation from the PTC thermistor is not optimal in such an embodiment of the component.

Patent Abstracts of Japan, Bd.11, No.4 (E-468), 7 Januar 1987 und JP-A-61180588 offenbaren eine Vorrichtung zur Klemmkontaktierung von elektrischen Bauelementen mit einem geschlossenen Gehäuse.Patent Abstracts of Japan, Vol. 11, No.4 (E-468), January 7, 1987 and JP-A-61180588 disclose a device for clamping contacting of electrical components with a closed housing.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Klemmkontaktierung für elektrische Bauelemente, insbesondere Kaltleiter, mit verbesserter Wärmeabfuhr nach außen anzugeben.The present invention has for its object to provide a clamp contact for electrical components, in particular PTC thermistors, with improved heat dissipation to the outside.

Diese Aufgabe wird bei einer Vorrichtung der eingangs genannten Art erfindungsgemäß durch die Merkmale des kennzeichnenden Teils des Patentanspruchs 1 gelöst.This object is achieved according to the invention in a device of the type mentioned at the outset by the features of the characterizing part of patent claim 1.

Weiterbildungen der Erfindung sind Gegenstand von Unteransprüchen.Developments of the invention are the subject of dependent claims.

Die Erfindung wird im folgenden anhand von in den Figuren der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Es zeigt:

Figur 1
eine Ausführungsform einer Klemmkontaktierung für einen Kaltleiter;
Figur 2
eine Ausführungsform von Kunststoffkappen zur Verwendung bei der Klemmkontaktierung eines Kaltleiters;
Figur 3
eine Ausführungsform einer Metallfeder zur Klemmkontaktierung;
Figur 4
eine Seitenansicht eines mittels Klemmkontaktierung kontaktierten Kaltleiters; und
Figur 5
eine der Figur 4 entsprechende Darstellung bei einer Drehung um 90°.
The invention is explained in more detail below with reference to exemplary embodiments shown in the figures of the drawing. It shows:
Figure 1
an embodiment of a clamp contact for a PTC thermistor;
Figure 2
an embodiment of plastic caps for use in the terminal contact of a PTC thermistor;
Figure 3
an embodiment of a metal spring for clamping contact;
Figure 4
a side view of a PTC thermistor contacted by means of terminal contacting; and
Figure 5
a representation corresponding to Figure 4 with a rotation of 90 °.

Wie die Figuren 1 und 2 zeigen, sind für eine Klemmkontaktierung einer Bauelementescheibe eines elektrischen Bauelementes zunächst zwei aus isolierendem Material, insbesondere aus Kunststoff hergestellte Kappen 2 und 3 vorgesehen. Die Bauelementescheibe wird im Ausführungsbeispiel durch eine Kaltleiterscheibe 1 gebildet, welche kreisförmigen Querschnitt besitzt, wie dies aus Figur 1 ersichtlich ist.As FIGS. 1 and 2 show, two caps 2 and 3 made of insulating material, in particular of plastic, are initially provided for a clamping contact of a component disk of an electrical component. In the exemplary embodiment, the component disc is formed by a PTC thermistor disc 1, which has a circular cross section, as can be seen from FIG. 1.

Die Kunststoffkappen 2 und 3 sind generell napfförmig ausgebildet und besitzen dabei im wesentlichen U-förmigen Querschnitt, wie dies aus Figur 2 ersichtlich ist. In Seitenwänden der Kappen 2 und 3 sind Ausnehmungen 4 bzw. 5 vorgesehen, welchen in im folgenden noch zu erläuternder Weise zur Aufnahme von Federelementen für die Klemmkontaktierung dienen. Figur 3 zeigt eine Ausführungsform eines derartigen Federelementes. Ein langegestreckter Schenkel diese Federelementes 8 besitzt im Bereich zwischen seinen Enden ein bogenförmiges Stück 10, dessen konvexe Seite unter Druck an der Kaltleiterscheibe 1 anliegt, wie dies im folgenden noch genauer erläutert wird.The plastic caps 2 and 3 are generally cup-shaped and have an essentially U-shaped cross section, as can be seen from FIG. 2. In the side walls of the caps 2 and 3, recesses 4 and 5 are provided, which serve in the manner to be explained in the following for receiving spring elements for the clamping contact. Figure 3 shows an embodiment of such a spring element. An elongated leg of this spring element 8 has in the area between its Ends an arcuate piece 10, the convex side of which rests under pressure on the PTC thermistor 1, as will be explained in more detail below.

Ein kurzes freies Ende 11 des langgestreckten Schenkels des Federelementes 8 wird bei der Klemmkontaktierung der Halbleiterscheibe 1 von einem der beiden Kappen, nämlich von der Kappe 2 aufgenommen, während das andere längere freie Ende 12 des langgestreckten Schenkels des Federelementes 8 von der anderen Kappe 3 aufgenommen wird. Zwei Zungen 9 an den Enden des bogenförmigen Stücks 10 rasten beim Einsetzen des Federelementes 8 in die Kappen 2 und 3 in die Ausnehmungen 4 bzw. 5 ein.A short free end 11 of the elongated leg of the spring element 8 is received by one of the two caps, namely the cap 2, during the clamping contact of the semiconductor wafer 1, while the other longer free end 12 of the elongated leg of the spring element 8 is received by the other cap 3 becomes. Two tongues 9 at the ends of the arcuate piece 10 snap into the recesses 4 and 5 when the spring element 8 is inserted into the caps 2 and 3.

Zur Klemmkontaktierung jeweils einer Kaltleiterscheibe 1 ist jeweils ein Paar von Kappen 2, 3 derart ausgebildet, daß eine Kappe, nämlich die Kappe 2 Nuten 6 aufweist, welche in Figur 2 gesehen an der Oberseite der Kappe 2 geschlossen sind. Diese einseitig geschlossenen Nuten 6 dienen zur Aufnahme des freien Endes 11 von zwei Federelementen 8, wobei die diesem freien Ende 11 benachbarte Zunge 9 in jeweils eine Ausnehmung 4 der Kappe 2 einrasten kann.For clamping contact with a PTC thermistor 1, a pair of caps 2, 3 is formed such that one cap, namely the cap 2, has grooves 6, which, as seen in FIG. 2, are closed at the top of the cap 2. These grooves 6, closed on one side, serve to receive the free end 11 of two spring elements 8, the tongue 9 adjacent to this free end 11 being able to snap into a recess 4 of the cap 2.

Gemäß Figur 2 sind in der Kappe 3 ebenfalls Nuten 7 vorgesehen, welche jedoch beidseitig offen sind, so daß ein Federelement 8 mit seinem längeren freien Ende 12 durch diese Noten 7 derart gesteckt werden kann, daß die diesem freien Ende benachbarte Zunge 9 in die Ausnehmung 5 einrasten kann.According to Figure 2, grooves 7 are also provided in the cap 3, but these are open on both sides, so that a spring element 8 with its longer free end 12 can be inserted through these notes 7 such that the tongue 9 adjacent to this free end into the recess 5 can snap into place.

Es ist nicht unbedingt erforderlich, daß die Nuten 6 in der Kappe 2 einseitig geschlossen sind. Sie können ebenso wie die Nuten 7 in der Kappe 3 beidseitig offen sein. Dies ist in Figur 2 nicht eigens dargestellt.It is not absolutely necessary for the grooves 6 in the cap 2 to be closed on one side. Like the grooves 7 in the cap 3, they can be open on both sides. This is not specifically shown in Figure 2.

Aus den Figuren 4 und 5 ist ersichtlich, wie durch zwei Federelemente 8 in zwei Kappen 2 und 3 eine Kaltleiterscheibe 1 sowohl elektrisch kontaktiert als auch durch Klemmen mechanisch zwischen den Kappen 2 und 3 gehalten wird. Speziell zeigt Figur 5, wie die bogenförmigen Stücke 10 der beiden Federelemente 8 mit ihrer konvexen Seite gegen die Halbleiterscheibe 1 drücken und sie damit mechanisch in ihrer Lage zwischen den Kappen 2 und 3 halten. Aus Figur 4 ist ersichtlich, daß das bogenförmige Stück 10 im Vergleich zu den freien Enden (in Figur 4 ist das freie Ende 12 sichtbar) breiter ausgebildet sein kann, wodurch die Anlagefläche an der Kaltleiterscheibe 1 ausreichend groß wird, um eine sichere Klemmung zu gewährleisten.It can be seen from FIGS. 4 and 5 how two spring elements 8 in two caps 2 and 3 both electrically contact a PTC thermistor 1 and hold it mechanically between the caps 2 and 3 by clamping. FIG. 5 specifically shows how the curved pieces 10 of the two spring elements 8 press with their convex side against the semiconductor wafer 1 and thus hold them mechanically in their position between the caps 2 and 3. It can be seen from FIG. 4 that the arcuate piece 10 can be made wider than the free ends (in FIG. 4 the free end 12 is visible), as a result of which the contact surface on the PTC thermistor disk 1 is sufficiently large to ensure secure clamping .

Zur Realisierung der mechanischen und elektrischen Kontaktierung sind auch andere Formen des Stückes 10 möglich. Die einzige Forderung besteht darin, daß eine ausreichende Kontaktierung gewährleistet bleibt.Other forms of the piece 10 are also possible for realizing the mechanical and electrical contacting. The only requirement is that sufficient contacting is guaranteed.

Die längeren freien Enden 12 der Federelemente 8 dienen gleichzeitig als elektrische Außenanschlüsse für das Kaltleiterbauelement, das durch die Kaltleiterpille 1, die Kappen 2 und 3 und die Federelemente 8 gebildet wird.The longer free ends 12 of the spring elements 8 simultaneously serve as electrical external connections for the PTC thermistor component, which is formed by the PTC thermistor pill 1, the caps 2 and 3 and the spring elements 8.

Da bei der erfindungsgemäßen Klemmkontaktierung nur ein Teil der Kaltleiterscheibe 1 durch die Kappen 2, 3 sowie die Kontaktierungsbereiche der Federelemente abgedeckt sind, wird gegenüber Ausführungsformen mit geschlossenen Gehäusen eine wesentlich bessere Wärmeabfuhr erreicht. Dazu können die Kappen auch von der in den Figuren dargestellten Form abweichende Formen besitzen.Since only a part of the PTC thermistor 1 is covered by the caps 2, 3 and the contacting areas of the spring elements in the terminal contacting according to the invention, a significantly better heat dissipation is achieved compared to embodiments with closed housings. For this purpose, the caps can also have shapes that differ from the shape shown in the figures.

Claims (6)

  1. Apparatus for making clamping contact with electrical components, in particular PTC thermistors, in which a component wafer (1) is mechanically held, by means of spring elements (8) engaged therewith, in a mount (2, 3) and is made contact with electrically, characterized in that the mount is formed by a pair of caps (2, 3) containing recesses (4, 5), in that the spring elements (8) have tongues (9), and in that the tongues (9) engage into the recesses (4, 5) in the caps (2, 3) when the spring elements (8) are inserted into the caps (2, 3), and hence position the component wafer (1) and the caps (2, 3) in their relative positions.
  2. Apparatus according to Claim 1, characterized in that one of the caps (2) has grooves (6) closed at one side for accommodating a free end (11) of the spring elements (8), and the other cap (3) has grooves (7) which are open at both sides and through which the other free end (12) of the spring elements (8) can be inserted.
  3. Apparatus according to Claim 1, characterized in that grooves (6, 7) provided in the caps (2, 3) are open at both sides.
  4. Apparatus according to one of Claims 1 to 3, characterized in that a portion (10) of the spring elements (8) which lies between the tongues (9) and is engaged with the component wafer (1) has a convex shape in the direction of the component wafer (1).
  5. Apparatus according to Claim 4, characterized in that the convex portion (10) of the spring elements (8) is wider than the free end (11, 12) thereof.
  6. Apparatus according to one of Claims 1 to 5, characterized in that the caps (2, 3) are produced from plastic.
EP93105689A 1992-04-15 1993-04-06 Appliance for contact clamping of electrical devices Expired - Lifetime EP0565998B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4212654 1992-04-15
DE4212654 1992-04-15

Publications (3)

Publication Number Publication Date
EP0565998A2 EP0565998A2 (en) 1993-10-20
EP0565998A3 EP0565998A3 (en) 1994-09-07
EP0565998B1 true EP0565998B1 (en) 1996-03-13

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ID=6456898

Family Applications (1)

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EP93105689A Expired - Lifetime EP0565998B1 (en) 1992-04-15 1993-04-06 Appliance for contact clamping of electrical devices

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EP (1) EP0565998B1 (en)
AT (1) ATE135489T1 (en)
DE (1) DE59301834D1 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61180588A (en) * 1986-01-16 1986-08-13 Matsushita Refrig Co Positive characteristic thermistor

Also Published As

Publication number Publication date
DE59301834D1 (en) 1996-04-18
EP0565998A2 (en) 1993-10-20
EP0565998A3 (en) 1994-09-07
ATE135489T1 (en) 1996-03-15

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