EP0809264A1 - Device for mutually fixing of ferromagnetic cores and supports for electric windings in inductive components - Google Patents

Device for mutually fixing of ferromagnetic cores and supports for electric windings in inductive components Download PDF

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Publication number
EP0809264A1
EP0809264A1 EP97106573A EP97106573A EP0809264A1 EP 0809264 A1 EP0809264 A1 EP 0809264A1 EP 97106573 A EP97106573 A EP 97106573A EP 97106573 A EP97106573 A EP 97106573A EP 0809264 A1 EP0809264 A1 EP 0809264A1
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EP
European Patent Office
Prior art keywords
spring
ring
ring spring
toothing
ferromagnetic
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.)
Withdrawn
Application number
EP97106573A
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German (de)
French (fr)
Inventor
Bernhard Faust
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
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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 EP0809264A1 publication Critical patent/EP0809264A1/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F17/043—Fixed inductances of the signal type  with magnetic core with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support

Definitions

  • the present invention relates to a device for the mutual fixing of ferromagnetic cores and carriers for electrical conductors in inductive components.
  • the core and coil former are clamped with plastic insulating washers for mutual fixing, the core being additionally soldered into a circuit board by means of a clip for permanent fastening.
  • plastic insulating washers made of plastic are not stable in the long term and are unsuitable for temperatures occurring during the soldering processes.
  • the core and the bobbin can also be fixed to one another by gluing, which is the case in particular with SMD inductors.
  • gluing which is the case in particular with SMD inductors.
  • this is comparatively expensive and not reliable and there is also no possibility of post-processing or recycling.
  • FIG. 7 of the drawings Such a design is, for example, from the data book Ferrites and accessories "by the applicant, 1994 edition, p. 215.
  • FIG. 7 shows the essential parts of an inductive component in the form of an exploded view.
  • the component has a coil former 1 and two magnetic core halves 2, 3 which are placed on the coil former 1 and held on the coil former by means of clips 5. Between A first insulating washer 4 is inserted into the coil former 1 and the upper core half 2. A second insulating washer 6 is placed on the underside of the lower core half 3.
  • the present invention has for its object to provide a backlash-free fixation of the type mentioned above, which is long-term stable and is also resistant to high temperatures, such as occur during soldering.
  • Figures 1 to 6 each show an embodiment of a fixing spring according to the invention and Figure 7 shows the already explained pin design of an inductive component.
  • an annular spring 10 with a slot 11 is provided.
  • This ring spring 10, 11 is made of metallic material.
  • the metallic material can be a non-ferromagnetic or weakly ferromagnetic material.
  • the slot 11 is essential for an electrical interruption of the spring body.
  • the spring 10 has an outer slot toothing 12, wherein in FIG. 1 the toothing is twisted by one in the radial direction extending axis is indicated, whereby the spring action comes about.
  • an internal slot toothing 22 is provided, with the toothing also being rotated in order to achieve the spring action.
  • a toothing 32 in the form of a toothed ring is provided, the teeth also being twisted again to achieve the spring action.
  • FIGS. 4A and 4B show an annular spring 40 with a slot 41 in the form of a plate spring with a curvature which can be seen in FIG. 4B and which ensures the spring action.
  • FIGS. 5A and 5B show an annular spring 50 with a slot 51, in which the spring body is rotated in the annular plane in the manner shown in FIG. 5B.
  • FIG. 6 shows a plate spring 60 with a slot 61 in the form of circular ring segments which are connected to one another at one end and which have a curvature (not shown in more detail) perpendicular to the plane of the drawing in order to achieve the spring action.
  • the springs shown in FIGS. 1 to 6 can be used, for example, instead of the insulating washer 4 according to FIG. 7 for fixing the coil former 1 and the core halves 2, 3 against one another.
  • the support for electrical lines need not be exclusively a coil former of the type shown in FIG. It can also be a single or multi-layer circuit board.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Bolts, Nuts, And Washers (AREA)

Abstract

A device for fixing of ferromagnetic cores (2,3) and carriers (1) for electrical conductors in inductive components, in particular, in inductances designed for SMD-technology. A annular spring (10) made of a metallic material and provided with discontinuities in the form of slots is provided in a gap between the ferromagnetic core and the electrical conductor carrier. A non-ferromagnetic material is used for the ring-shaped spring, the latter being more specifically an externally or internally toothed annular spring.

Description

Die vorliegende Erfindung betrifft eine Einrichtung zur gegenseitigen Fixierung von ferromagnetischen Kernen und Trägern für elektrische Leiter in induktiven Bauelementen.The present invention relates to a device for the mutual fixing of ferromagnetic cores and carriers for electrical conductors in inductive components.

Bei Stiftbauformen von induktiven Bauelementen werden Kern und Spulenkörper zur gegenseitigen Fixierung mit Isolierscheiben aus Kunststoff geklemmt, wobei der Kern zur dauerhaften Befestigung zusätzlich über eine Klammer in eine Schaltungsplatine eingelötet wird. Dabei ergibt sich die Schwierigkeit, daß Isolierscheiben aus Kunststoff nicht langzeit stabil sind und für bei den Lötvorgängen auftretende Temperaturen ungeeignet sind.In the case of pin designs of inductive components, the core and coil former are clamped with plastic insulating washers for mutual fixing, the core being additionally soldered into a circuit board by means of a clip for permanent fastening. The difficulty arises here that insulating washers made of plastic are not stable in the long term and are unsuitable for temperatures occurring during the soldering processes.

Weiterhin können Kern und Spulenkörper auch durch Kleben gegeneinander fixiert werden, was insbesondere bei SMD-Induktivitäten der Fall ist. Dies ist jedoch vergleichsweise teuer und nicht prozeßsicher und es besteht darüber hinaus keine Möglichkeit einer Nachbearbeitung oder eines Recycling.Furthermore, the core and the bobbin can also be fixed to one another by gluing, which is the case in particular with SMD inductors. However, this is comparatively expensive and not reliable and there is also no possibility of post-processing or recycling.

Die erstgenannte Möglichkeit des Klemmens von Kern und Spulenkörper bei Stiftbauformen mittels isolierenden Kunststoffscheiben ist in Figur 7 der Zeichnungen dargestellt. Eine derartige Bauform ist beispielsweise aus dem Datenbuch

Figure imgb0001
Ferrite und Zubehör" der Anmelderin, Ausgabe 1994, S. 215 bekannt.The first-mentioned possibility of clamping the core and bobbin in pin designs by means of insulating plastic disks is shown in FIG. 7 of the drawings. Such a design is, for example, from the data book
Figure imgb0001
Ferrites and accessories "by the applicant, 1994 edition, p. 215.

Figur 7 zeigt die wesentlichen Teile eines induktiven Bauelementes in Form einer Explosionsdarstellung. Das Bauelement besitzt einen Spulenkörper 1 sowie zwei Magnetkernhälften 2, 3 welche auf den Spulenkörper 1 aufgesetzt und mittels Klammern 5 auf dem Spulenkörper gehalten werden. Zwischen den Spulenkörper 1 und die obere Kernhälfte 2 ist eine erste Isolierscheibe 4 eingefügt. Eine zweite Isolierscheibe 6 wird auf die Unterseite der unteren Kernhälfte 3 aufgesetzt. Beim Zusammenfügen des Bauelementes mit den Klammern 5 sowie beim Einbau des Bauelementes etwa in eine Schaltungsplatine werden der Spulenkörper 1 und die Kernhälften 2, 3 verdrehsicher gegeneinander fixiert.FIG. 7 shows the essential parts of an inductive component in the form of an exploded view. The component has a coil former 1 and two magnetic core halves 2, 3 which are placed on the coil former 1 and held on the coil former by means of clips 5. Between A first insulating washer 4 is inserted into the coil former 1 and the upper core half 2. A second insulating washer 6 is placed on the underside of the lower core half 3. When assembling the component with the clamps 5 and when installing the component, for example in a circuit board, the coil former 1 and the core halves 2, 3 are fixed against one another in a rotationally secure manner.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine spielfreie, verdrehsichere Fixierung der oben genannten Art zu schaffen, welche langzeitstabil ist und auch für hohe Temperaturen, wie sie beispielsweise beim Löten auftreten, noch beständig ist.The present invention has for its object to provide a backlash-free fixation of the type mentioned above, which is long-term stable and is also resistant to high temperatures, such as occur during soldering.

Diese Aufgabe wird bei einer Einrichtung der eingangs genannten Art erfindungsgemäß durch die Maßnahmen nach dem kennzeichnenden Teil des Patentanspruchs 1 gelöst.This object is achieved according to the invention in a device of the type mentioned at the outset by the measures according to 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 nachfolgend anhand von in den Figuren der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Dabei zeigen die Figuren 1 bis 6 jeweils eine Ausführungsform einer erfindungsgemäßen Fixierungsfeder und Figur 7 die bereits erläuterte Stiftbauform eines induktiven Bauelementes.The invention is explained in more detail below with reference to exemplary embodiments shown in the figures of the drawing. Figures 1 to 6 each show an embodiment of a fixing spring according to the invention and Figure 7 shows the already explained pin design of an inductive component.

Gemäß Figur 1 ist eine Ringfeder 10 mit einem Schlitz 11 vorgesehen. Diese Ringfeder 10, 11 ist aus metallischem Material hergestellt. Das metallische Material kann ein nicht ferromagnetisches oder schwach ferromagnetisches Material sein. Der Schlitz 11 ist für eine elektrische Unterbrechung des Federkörpers wesentlich.According to FIG. 1, an annular spring 10 with a slot 11 is provided. This ring spring 10, 11 is made of metallic material. The metallic material can be a non-ferromagnetic or weakly ferromagnetic material. The slot 11 is essential for an electrical interruption of the spring body.

Die Feder 10 weist eine äußere Schlitzzahnung 12 auf, wobei in Figur 1 eine Verdrehung der Zahnung um eine in Radialrichtung verlaufende Achse angedeutet ist, wodurch die Federwirkung zustande kommt.The spring 10 has an outer slot toothing 12, wherein in FIG. 1 the toothing is twisted by one in the radial direction extending axis is indicated, whereby the spring action comes about.

Bei einer Ringfeder 20 mit einem Schlitz 21 gemäß Figur 2 ist eine Innenschlitzzahnung 22 vorgesehen, wobei ebenfalls wiederum zur Realisierung der Federwirkung eine Verdrehung der Zahnung vorgesehen ist.In the case of an annular spring 20 with a slot 21 according to FIG. 2, an internal slot toothing 22 is provided, with the toothing also being rotated in order to achieve the spring action.

Bei der Ausführungsform einer Feder 30 mit einem Schlitz 31 nach Figur 3 ist eine Zahnung 32 in Form eines Zahnkranzes vorgesehen, wobei die Zähne zur Realisierung der Federwirkung ebenfalls wieder verdreht sind.In the embodiment of a spring 30 with a slot 31 according to FIG. 3, a toothing 32 in the form of a toothed ring is provided, the teeth also being twisted again to achieve the spring action.

Die Figuren 4A und 4B zeigen eine Ringfeder 40 mit einem Schlitz 41 in Form einer Tellerfeder mit einer aus Figur 4B ersichtlichen Wölbung, welche die Federwirkung gewährleistet.FIGS. 4A and 4B show an annular spring 40 with a slot 41 in the form of a plate spring with a curvature which can be seen in FIG. 4B and which ensures the spring action.

Die Figuren 5A und 5B zeigen eine kreisringförmige Feder 50 mit einem Schlitz 51, bei welcher der Federkörper in der aus Figur 5B ersichtlichen Weise in der Kreisringebene verdreht ist.FIGS. 5A and 5B show an annular spring 50 with a slot 51, in which the spring body is rotated in the annular plane in the manner shown in FIG. 5B.

Figur 6 zeigt eine Tellerfeder 60 mit einem Schlitz 61 in Form von an einem Ende miteinander verbundenen Kreisringsegmenten, die zur Realisierung der Federwirkung senkrecht zur Zeichenebene eine (nicht naher dargestellte) Wölbung aufweisen.FIG. 6 shows a plate spring 60 with a slot 61 in the form of circular ring segments which are connected to one another at one end and which have a curvature (not shown in more detail) perpendicular to the plane of the drawing in order to achieve the spring action.

Die in den Figuren 1 bis 6 dargestellten Federn sind beispielsweise anstelle der Isolierscheibe 4 nach Figur 7 zur Fixierung des Spulenkörpers 1 und der Kernhälften 2, 3 gegeneinander verwendbar.The springs shown in FIGS. 1 to 6 can be used, for example, instead of the insulating washer 4 according to FIG. 7 for fixing the coil former 1 and the core halves 2, 3 against one another.

Es ist darauf hinzuweisen, daß der Träger für elektrische Leitungen nicht ausschließlich ein Spulenkörper der in Figur 7 dargestellten Art sein muß. Es kann auch ein Ein- oder Mehrlagenleiterplatte sein.It should be pointed out that the support for electrical lines need not be exclusively a coil former of the type shown in FIG. It can also be a single or multi-layer circuit board.

Claims (12)

Einrichtung zur Fixierung von ferromagnetischen Kernen (2, 3) und Trägern (1) für elektrische Leiter in induktiven Bauelementen, insbesondere in für SMD-Montage ausgebildeten Induktivitäten,
dadurch gekennzeichnet,
daß in einem Spalt zwischen ferromagnetischem Kern (2, 3) und Träger (1) für elektrische Leiter eine geschlitzte Ringfeder (10; 20; 30; 40; 50; 60) aus metallischem Material vorgesehen ist.Device for fixing ferromagnetic cores (2, 3) and supports (1) for electrical conductors in inductive components, in particular in inductors designed for SMD mounting,
characterized,
that a slotted ring spring (10; 20; 30; 40; 50; 60) made of metallic material is provided in a gap between the ferromagnetic core (2, 3) and carrier (1) for electrical conductors. Einrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß das Material der Ringfeder (10; 20; 30; 40; 50; 60) ein nicht ferromagnetisches Material ist.Device according to claim 1,
characterized,
that the material of the ring spring (10; 20; 30; 40; 50; 60) is a non-ferromagnetic material. Einrichtung nach Anspruch 1 und/oder 2,
dadurch gekennzeichnet,
daß die Ringfeder eine außen gezahnte Ringfeder (10, 11, 12; 30, 31, 32) ist.Device according to claim 1 and / or 2,
characterized,
that the ring spring is an externally toothed ring spring (10, 11, 12; 30, 31, 32). Einrichtung nach Anspruch 1 und/oder 2,
dadurch gekennzeichnet,
daß die Ringfeder eine innen gezahnte Ringfeder (20, 21, 22) ist.Device according to claim 1 and / or 2,
characterized,
that the ring spring is an internally toothed ring spring (20, 21, 22). Einrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die Zahnung (12; 22) der Ringfeder (10, 11, 12; 20, 21, 22) eine Schlitzzahnung ist.Device according to one of claims 1 to 4,
characterized,
that the toothing (12; 22) of the ring spring (10, 11, 12; 20, 21, 22) is a slot toothing. Einrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die Zahnung (32) der Ringfeder (30, 31, 32) eine Zahnkranzzahnung ist.Device according to one of claims 1 to 4,
characterized,
that the toothing (32) of the ring spring (30, 31, 32) is a ring gear toothing. Einrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Ringfeder eine Tellerfeder (40, 41; 50, 51) ist.Device according to claim 1,
characterized,
that the ring spring is a plate spring (40, 41; 50, 51). Einrichtung nach Anspruch 7,
dadurch gekennzeichnet,
daß die Tellerfeder eine kreisringförmige in der Kreisringebene gewölbte Feder (40, 41) ist.Device according to claim 7,
characterized,
that the plate spring is an annular spring (40, 41) which is curved in the annular plane. Einrichtung nach Anspruch 7,
dadurch gekennzeichnet,
daß die Tellerfeder eine kreisringförmige in der Kreisringebene verdrehte Feder (50, 51) ist.Device according to claim 7,
characterized,
that the plate spring is an annular spring (50, 51) rotated in the annular plane. Einrichtung nach Anspruch 7,
dadurch gekennzeichnet,
daß die Tellerfeder (60, 61, 62) aus zwei gewölbten an einem Ende miteinander verbundenen Kreisringsegmenten (62) gebildet ist.Device according to claim 7,
characterized,
that the plate spring (60, 61, 62) is formed from two curved circular ring segments (62) connected to one another at one end. Einrichtung nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet,
daß der Träger (1) für elektrische Leiter ein Spulenkörper ist.Device according to one of claims 1 to 10,
characterized,
that the carrier (1) for electrical conductors is a coil former. Einrichtung nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet,
daß der Träger für elektrische Leiter eine mindestens einlagige Leiterplatte ist.Device according to one of claims 1 to 10,
characterized,
that the carrier for electrical conductors is an at least single-layer printed circuit board.
EP97106573A 1996-05-24 1997-04-21 Device for mutually fixing of ferromagnetic cores and supports for electric windings in inductive components Withdrawn EP0809264A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19621126 1996-05-24
DE19621126 1996-05-24

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EP (1) EP0809264A1 (en)
JP (1) JPH1064733A (en)
KR (1) KR970076914A (en)
CN (1) CN1167991A (en)
CA (1) CA2205787A1 (en)
SG (1) SG54499A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016155969A3 (en) * 2015-03-27 2016-11-24 Epcos Ag Inductive component and method for producing an inductive component
GB2581322A (en) * 2018-12-23 2020-08-19 Secheron Hasler Uk Ltd A contact washer and a device for the transfer of electric current including such a washer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001349348A (en) * 2000-06-05 2001-12-21 Aichi Mach Ind Co Ltd Two-way differential clutch
CN112034218B (en) * 2020-09-22 2024-04-05 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） CAF testing device and testing method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR996091A (en) * 1945-04-24 1951-12-12 Comp Generale Electricite Method of protecting a coil with or without a magnetic core and corresponding sealed assembly
DE854382C (en) * 1951-02-27 1952-11-04 Schaub Appbau Ges M B H G Method of fixing coils on cores or in tubes
GB1125275A (en) * 1964-08-30 1968-08-28 Plessey Uk Ltd Improvements relating to electromagnetic apparatus
DE1564623A1 (en) * 1966-06-10 1969-07-24 Siemens Ag Multi-turn coil or transformer
CH499188A (en) * 1968-08-02 1970-11-15 Telefunken Patent Pot core coil used in communications technology with several symmetrical windings, in particular Pupin's coil
FR2118872A1 (en) * 1970-12-24 1972-08-04 Fr

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR996091A (en) * 1945-04-24 1951-12-12 Comp Generale Electricite Method of protecting a coil with or without a magnetic core and corresponding sealed assembly
DE854382C (en) * 1951-02-27 1952-11-04 Schaub Appbau Ges M B H G Method of fixing coils on cores or in tubes
GB1125275A (en) * 1964-08-30 1968-08-28 Plessey Uk Ltd Improvements relating to electromagnetic apparatus
DE1564623A1 (en) * 1966-06-10 1969-07-24 Siemens Ag Multi-turn coil or transformer
CH499188A (en) * 1968-08-02 1970-11-15 Telefunken Patent Pot core coil used in communications technology with several symmetrical windings, in particular Pupin's coil
FR2118872A1 (en) * 1970-12-24 1972-08-04 Fr

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016155969A3 (en) * 2015-03-27 2016-11-24 Epcos Ag Inductive component and method for producing an inductive component
US10580562B2 (en) 2015-03-27 2020-03-03 Epcos Ag Inductive component and method for producing an inductive component
GB2581322A (en) * 2018-12-23 2020-08-19 Secheron Hasler Uk Ltd A contact washer and a device for the transfer of electric current including such a washer
GB2581322B (en) * 2018-12-23 2022-09-21 Secheron Hasler Uk Ltd A device for the transfer of electric current including a contact washer

Also Published As

Publication number Publication date
CN1167991A (en) 1997-12-17
SG54499A1 (en) 1998-11-16
CA2205787A1 (en) 1997-11-24
KR970076914A (en) 1997-12-12
JPH1064733A (en) 1998-03-06

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