EP2383755B1 - Induction component - Google Patents

Induction component Download PDF

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Publication number
EP2383755B1
EP2383755B1 EP11163227.9A EP11163227A EP2383755B1 EP 2383755 B1 EP2383755 B1 EP 2383755B1 EP 11163227 A EP11163227 A EP 11163227A EP 2383755 B1 EP2383755 B1 EP 2383755B1
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EP
European Patent Office
Prior art keywords
flange
induction component
coil
shielding ring
air gap
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.)
Active
Application number
EP11163227.9A
Other languages
German (de)
French (fr)
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EP2383755A1 (en
Inventor
Alexander Gerfer
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.)
Wuerth Elektronik Eisos GmbH and Co KG
Original Assignee
Wuerth Elektronik Eisos GmbH and Co KG
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Priority to PL11163227T priority Critical patent/PL2383755T3/en
Publication of EP2383755A1 publication Critical patent/EP2383755A1/en
Application granted granted Critical
Publication of EP2383755B1 publication Critical patent/EP2383755B1/en
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Classifications

    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
    • 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
    • H01F17/045—Fixed inductances of the signal type  with magnetic core with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
    • H01R12/722—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures coupling devices mounted on the edge of the printed circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6658—Structural association with built-in electrical component with built-in electronic circuit on printed circuit board
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6666—Structural association with built-in electrical component with built-in electronic circuit with built-in overvoltage protection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
    • H01R12/722—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures coupling devices mounted on the edge of the printed circuits
    • H01R12/724—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures coupling devices mounted on the edge of the printed circuits containing contact members forming a right angle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits

Definitions

  • the invention relates to an induction component or a body for producing such an induction component.
  • Induction components are often needed in electronics. They contain a ferrite core and at least one coil wound around the ferrite core. The assembly is then surrounded by an outer shield. The induction components are designed so that they can be mounted on a printed circuit board, wherein at the same time an electrical connection is made in the attachment.
  • a two-part housing which has both the shield and the core for the coil. Through lateral openings, the ends of the wire forming the coil are led out.
  • inductor component in which a coil core with two flanges is surrounded by a shield, an intermediate ring of insulating material being arranged between the edge of the identically sized flanges and the shield ring ( DE 10212930 ).
  • induction component with a coil core and a surrounding shielding. Between the flanges of the coil core and the shield, an air gap is present whose size remains constant due to a bonding of the components with each other ( US 2007/0018770 A1 ).
  • the invention is based on the object to provide a way to ensure the correct size of an air gap in an induction component.
  • the invention proposes an induction component with the features mentioned in claim 1. Further developments of the invention are the subject of dependent claims.
  • the inductance component proposed by the invention thus contains a coil body and a screen ring surrounding it and serving for the shielding.
  • the bobbin in turn contains a usually but not necessarily cylindrical core around it the coil is wound.
  • a flange is formed, which has an inner side facing the coil core and an opposite outer side. This flange limits the space in which the coil is arranged.
  • the shield ring which delimits an air gap at at least one point relative to the bobbin, is now positioned relative to the flange by means of positioning means such that the air gap has the intended size and arrangement. The positioning act directly between the shield ring and the flange. An additional plastic housing is no longer required for this positioning or centering of the shield ring.
  • the positioning means between the shield ring and its associated flange will be realized by coordinated geometric design of the shield ring and / or the flange. Since both objects are metallic or metal-like materials, it is proposed by the invention to make the geometric design as simple as possible.
  • the shield ring has an inner step on its end face facing the flange, one leg of which forms a contact surface for resting on the flange.
  • the other leg of the inner step then forms a contact surface for engagement with the outer edge of the flange.
  • the invention may be provided in a development that the bobbin two spaced apart on the spool core flanges, and that the air gap between the peripheral edge of the one Flange and the inner wall surface of the shield ring is formed.
  • the step is provided on the front edge of the shield ring over the entire circumference of the shield ring.
  • the flange against which the positioning means are effective, has an outer contour deviating from a circle.
  • the outer edge of the flange has the shape of a circle with two parallel rectilinear flats.
  • the positioning means between the shield ring and the flange are provided at the flange, which serves for fastening of the induction component to the circuit board.
  • This flange is also larger in the radial direction than the opposite flange.
  • FIG. 1 shown in side view induction component includes a flange 1, the underside 2 is designed and intended for mounting in SMT on a printed circuit board. Above the flange 1, the shield 3 can be seen, which, however, as will be seen below, partially covers the edge of the flange 1.
  • FIG. 2 shows a cross section through the illustrated component along line II-II in FIG. 1 ,
  • the component contains a bobbin 4, which in turn contains a coil core 5.
  • This spool core 5 is cylindrical and has a circular cross-section.
  • the already mentioned flange 1 is formed, which has a flat inner surface 6 and the bottom 2. This flange limits the space available for a coil.
  • the bobbin 4 includes a second flange 7, which projects less far in the radial direction than the lower flange 1.
  • the upper end edge 8 in a plane with the top 9 of the upper Flange 7 is located.
  • an air gap 11 is formed between the edge of the upper flange 7 and the inner side 10 of the shield ring 3, an air gap 11 is formed. This air gap runs around the entire circumference throughout.
  • the lower flange 1 whose underside 2 is designed for fastening to a printed circuit board, contains a through hole 12 which adjoins directly to the outer circumference of the spool core 5. It serves to push through the end of the wire forming the coil, so that it can be soldered on the underside.
  • the shield ring 3 rests on the inside 6 of the lower flange 1. This is clearer from the FIG. 3 out.
  • the shield ring 3 has an inwardly directed step 14 at its lower end edge 13. This step has a first leg 15 extending parallel to the end edge 13 and a second leg 16 running perpendicular thereto and running parallel to the outside. With the first leg 15 of the step 14, the shield ring 3 rests on the inner side 6 of the lower flange 1. The second leg 16 abuts against the outer edge 17 of the lower flange 1. In FIG. 3 the distance between the outer edge 17 and the leg 16 is shown enlarged to illustrate the interaction more clearly.
  • step 14 runs around the entire circumference of the shield ring 3 around, so that the displacement of the shield ring 3 relative to the lower flange 1 is prevented in all directions.
  • the underside 2 is divided into three areas, namely two outer areas with a conductive coating and a middle area between the two coated areas 18, which remains free of coating.
  • the contour of the outer edge 17 of this lower Flange 1 has the shape of two arcs, which are interconnected by two rectilinear mutually parallel sections.
  • the end edge 13 of the shield ring 3 surrounds the outer edge 17 of the lower flange 1 all around.
  • FIG. 5 shows the induction component from below. Again, it can be seen that the lower end edge 13 of the shield ring 3 surrounds the flange 1 everywhere.
  • FIG. 6 now shows a perspective view of the induction component from above.
  • the air gap 11 formed between the flange 7 and the shield ring 3 can be seen. To the correct compliance of this air gap 11, it is in the present invention.
  • a bobbin 24 is shown, in which the bobbin 25 has a flange 11 only at its lower axial end, while it ends in the upper region without a flange.
  • the shield ring 23 in the region of its upper end edge 8 on an inwardly directed all-round leg 27. Between the inner edge of this leg 27 and the outside of the spool core 25, an air gap 21 is also formed, which is maintained in the same manner in its correct size and position as in the previous embodiment. Also serve this purpose formed between the lower flange 1 and the shield ring 23 by the step 14 positioning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • General Induction Heating (AREA)
  • Soft Magnetic Materials (AREA)

Description

Die Erfindung betrifft ein Induktionsbauteil beziehungsweise einen Körper zur Herstellung eines solchen Induktionsbauteils.The invention relates to an induction component or a body for producing such an induction component.

Induktionsbauteile werden in der Elektronik häufig benötigt. Sie enthalten einen Ferritkern und mindestens eine um den Ferritkern gewickelte Spule. Die Anordnung wird dann von einer äußeren Abschirmung umgeben. Die Induktionsbauteile sind so ausgebildet, dass sie auf einer Leiterplatte befestigt werden können, wobei bei der Befestigung gleichzeitig auch eine elektrische Verbindung hergestellt wird.Induction components are often needed in electronics. They contain a ferrite core and at least one coil wound around the ferrite core. The assembly is then surrounded by an outer shield. The induction components are designed so that they can be mounted on a printed circuit board, wherein at the same time an electrical connection is made in the attachment.

Bei einem bekannten Induktionsbauteil dieser Art ( US 6847280 ) ist ein zweiteiliges Gehäuse vorgesehen, das sowohl die Abschirmung als auch den Kern für die Spule aufweist. Durch seitliche Öffnungen werden die Enden des die Spule bildenden Drahtes herausgeführt.In a known induction component of this type ( US 6847280 ), a two-part housing is provided, which has both the shield and the core for the coil. Through lateral openings, the ends of the wire forming the coil are led out.

Ebenfalls bekannt ist eine Induktorkomponente, bei der ein Spulenkern mit zwei Flanschen von einer Abschirmung umgeben ist, wobei zwischen dem Rand der gleichgroßen Flansche und dem Schirmring ein Zwischenring aus Isoliermaterial angeordnet ist ( DE 10212930 ).Also known is an inductor component in which a coil core with two flanges is surrounded by a shield, an intermediate ring of insulating material being arranged between the edge of the identically sized flanges and the shield ring ( DE 10212930 ).

Nun gibt es auch Induktionsbauteile, bei denen zur Einhaltung bestimmter elektrischer Eigenschaften ein Luftspalt innerhalb des magnetischen Kreises vorhanden ist. Da dieser Luftspalt eine Auswirkung auf die elektrischen Eigenschaften des Induktionsbauteils hat, muss dafür gesorgt werden, dass der Luftspalt immer die korrekte Größe aufweist. Zu diesem Zweck ist bereits vorgeschlagen worden, ein Induktionsbauteil mit einem Spulenkörper und einer Abschirmung in einem Kunststoffgehäuse anzuordnen, und in dem Kunststoffgehäuse Ausrichtmittel unterzubringen, die sowohl den Spulenkörper als auch die Abschirmung gegenüber den Kunststoffgehäuse ausrichten und damit auch eine gegenseitige Positionierung zwischen dem Spulenkörper und der Abschirmung bewirken ( DE 102007063170 ).Now, there are also induction components in which an air gap within the magnetic circuit is present to comply with certain electrical properties. Since this air gap has an effect on the electrical properties of the induction component, it must be ensured that the air gap always has the correct size. For this purpose, it has already been proposed to arrange an induction component with a bobbin and a shield in a plastic housing, and to accommodate in the plastic housing alignment means which align both the bobbin and the shield against the plastic housing and thus a mutual positioning between the bobbin and cause the shielding ( DE 102007063170 ).

Weiterhin bekannt ist ein Induktionsbauteil mit einem Spulenkern und einer diesen umgebenden Abschirmung. Zwischen den Flanschen des Spulenkerns und der Abschirmung ist ein Luftspalt vorhanden, dessen Größe aufgrund einer Verklebung der Bauteile untereinander konstant bleibt ( US 2007/0018770 A1 ).Also known is an induction component with a coil core and a surrounding shielding. Between the flanges of the coil core and the shield, an air gap is present whose size remains constant due to a bonding of the components with each other ( US 2007/0018770 A1 ).

Der Erfindung liegt die Aufgabe zu Grunde, eine Möglichkeit zur Gewährleistung der korrekten Größe eines Luftspalts bei einem Induktionsbauteil zu schaffen.The invention is based on the object to provide a way to ensure the correct size of an air gap in an induction component.

Zur Lösung dieser Aufgabe schlägt die Erfindung ein Induktionsbauteil mit den im Anspruch 1 genannten Merkmalen vor. Weiterbildungen der Erfindung sind Gegenstand von Unteransprüchen.To solve this problem, the invention proposes an induction component with the features mentioned in claim 1. Further developments of the invention are the subject of dependent claims.

Das von der Erfindung vorgeschlagene Induktionsbauteil enthält also einen Spulenkörper und einen diesen umgebenden der Abschirmung dienenden Schirmring. Der Spulenkörper seinerseits enthält einen üblicherweise aber nicht notwendigerweise zylindrischen Kern, um den herum die Spule gewickelt wird. An mindestens einem axialen Ende ist ein Flansch ausgebildet, der eine dem Spulenkern zugewandte Innenseite und eine gegenüberliegende Außenseite aufweist. Dieser Flansch begrenzt den Raum, in dem die Spule angeordnet ist. Der Schirmring, der an mindestens einer Stelle gegenüber dem Spulenkörper einen Luftspalt begrenzt, ist nun gegenüber dem Flansch mithilfe von Positioniermitteln so positioniert, dass der Luftspalt die vorgesehene Größe und Anordnung aufweist. Die Positioniermittel wirken dabei direkt zwischen dem Schirmring und dem Flansch. Ein zusätzliches Kunststoffgehäuse ist für diese Positionierung beziehungsweise Zentrierung des Schirmrings nicht mehr erforderlich.The inductance component proposed by the invention thus contains a coil body and a screen ring surrounding it and serving for the shielding. The bobbin in turn contains a usually but not necessarily cylindrical core around it the coil is wound. At at least one axial end, a flange is formed, which has an inner side facing the coil core and an opposite outer side. This flange limits the space in which the coil is arranged. The shield ring, which delimits an air gap at at least one point relative to the bobbin, is now positioned relative to the flange by means of positioning means such that the air gap has the intended size and arrangement. The positioning act directly between the shield ring and the flange. An additional plastic housing is no longer required for this positioning or centering of the shield ring.

Die Positioniermittel zwischen dem Schirmring und dem ihm zugeordneten Flansch werden durch aufeinander abgestimmte geometrische Gestaltung des Schirmrings und/oder des Flanschs verwirklicht werden. Da es sich bei beiden Gegenständen um metallische oder metallähnliche Materialien handelt, wird von der Erfindung vorgeschlagen, die geometrische Gestaltung möglichst einfach zu gestalten.The positioning means between the shield ring and its associated flange will be realized by coordinated geometric design of the shield ring and / or the flange. Since both objects are metallic or metal-like materials, it is proposed by the invention to make the geometric design as simple as possible.

Hierzu ist vorgesehen, dass der Schirmring an seiner dem Flansch zugewandten Stirnkante eine innere Stufe aufweist, deren einer Schenkel eine Anlagefläche zur Auflage auf dem Flansch bildet. Der andere Schenkel der inneren Stufe bildet dann eine Anlagefläche zur Anlage an dem Außenrand des Flanschs. Dadurch bildet diese Stufe, die auf die Größe des Flanschs abgestimmt ist, ein Positioniermittel, das den Schirmring zentriert und positioniert, so dass damit der Luftspalt zwischen dem Spulenkörper und dem Schirmring die korrekte Größe und Anordnung erhält.For this purpose, it is provided that the shield ring has an inner step on its end face facing the flange, one leg of which forms a contact surface for resting on the flange. The other leg of the inner step then forms a contact surface for engagement with the outer edge of the flange. As a result, this stage, which is matched to the size of the flange, forms a positioning means which centers and positions the shield ring, so that the air gap between the coil former and the shield ring is given the correct size and arrangement.

Erfindungsgemäß kann in Weiterbildung vorgesehen sein, dass der Spulenkörper zwei mit Abstand an dem Spulenkern ausgebildete Flansche aufweist, und dass der Luftspalt zwischen der Randkante des einen Flanschs und der inneren Wandfläche des Schirmrings gebildet ist.According to the invention may be provided in a development that the bobbin two spaced apart on the spool core flanges, and that the air gap between the peripheral edge of the one Flange and the inner wall surface of the shield ring is formed.

Erfindungsgemäß kann in Weiterbildung vorgesehen sein, dass die Stufe an der Stirnkante des Schirmrings über den gesamten Umfang des Schirmrings vorgesehen ist. Dadurch wird der Schirmring gegen Verschieben in alle Richtungen gesichert.According to the invention may be provided in a development that the step is provided on the front edge of the shield ring over the entire circumference of the shield ring. As a result, the shield ring is secured against displacement in all directions.

Um den Schirmring auch gegenüber einem Verdrehen zu sichern und damit zu positionieren, kann erfindungsgemäß vorgesehen sein, dass der Flansch, dem gegenüber die Positioniermittel wirksam sind, eine von einem Kreis abweichende Außenkontur aufweist. Beispielsweise kann vorgesehen sein, dass der Außenrand des Flanschs die Form eines Kreises mit zwei parallelen geradlinigen Abflachungen aufweist.In order to secure the shield ring against rotation and thus to position it, according to the invention it can be provided that the flange, against which the positioning means are effective, has an outer contour deviating from a circle. For example, it can be provided that the outer edge of the flange has the shape of a circle with two parallel rectilinear flats.

Erfindungsgemäß kann in Weiterbildung vorgesehen sein, dass bei dem Vorhandensein von zwei Flanschen die Positioniermittel zwischen dem Schirmring und dem Flansch bei dem Flansch vorgesehen sind, der zur Befestigung des Induktionsbauteils an der Leiterplatte dient. Dieser Flansch ist in radialer Richtung auch größer als der gegenüberliegende Flansch.According to the invention can be provided in a further development that in the presence of two flanges, the positioning means between the shield ring and the flange are provided at the flange, which serves for fastening of the induction component to the circuit board. This flange is also larger in the radial direction than the opposite flange.

Weitere Merkmale, Einzelheiten und Vorzüge der Erfindung ergeben sich aus den Ansprüchen und der Zusammenfassung, deren beider Wortlaut durch Bezugnahme zum Inhalt der Beschreibung gemacht wird, der folgenden Beschreibung bevorzugter Ausführungsformen der Erfindung sowie anhand der Zeichnung. Hierbei zeigen:

Figur 1
die Seitenansicht eines Induktionsbauteils nach der Erfindung;
Figur 2
einen Schnitt längs Linie II-II in Figur 1;
Figur 3
eine vergrößerte Einzelansicht eines Teils aus Figur 2;
Figur 4
eine Ansicht des Induktionsbauteils von unten;
Figur 5
eine perspektivische Ansicht des Induktionsbauteils von unten;
Figur 6
eine perspektivische Ansicht des Induktionsbauteils von oben;
Figur 7
einen der Figur 2 entsprechenden Schnitt durch eine abgeänderte Ausführungsform des Induktionsbauteils nach der Erfindung.
Further features, details and advantages of the invention will become apparent from the claims and the abstract, the wording of which is incorporated by reference into the content of the description, the following description of preferred embodiments of the invention and with reference to the drawing. Hereby show:
FIG. 1
the side view of an induction component according to the invention;
FIG. 2
a section along line II-II in FIG. 1 ;
FIG. 3
an enlarged single view of a part FIG. 2 ;
FIG. 4
a view of the induction component from below;
FIG. 5
a perspective view of the induction component from below;
FIG. 6
a perspective view of the induction component from above;
FIG. 7
one of the FIG. 2 corresponding section through a modified embodiment of the induction component according to the invention.

Das in Figur 1 in Seitenansicht dargestellten Induktionsbauteil enthält einen Flansch 1, dessen Unterseite 2 zur Anbringung in SMT auf einer Leiterplatte ausgebildet und bestimmt ist. Oberhalb des Flanschs 1 ist die Abschirmung 3 zu sehen, die allerdings, wie sich im Folgenden noch zeigen wird, den Rand des Flanschs 1 zum Teil abdeckt.This in FIG. 1 shown in side view induction component includes a flange 1, the underside 2 is designed and intended for mounting in SMT on a printed circuit board. Above the flange 1, the shield 3 can be seen, which, however, as will be seen below, partially covers the edge of the flange 1.

Die Figur 2, auf die jetzt Bezug genommen wird, zeigt einen Querschnitt durch das dargestellte Bauteil längs Linie II-II in Figur 1. Das Bauteil enthält einen Spulenkörper 4, der seinerseits einen Spulenkern 5 enthält. Dieser Spulenkern 5 ist zylindrisch und weist einen kreisförmigen Querschnitt auf. An dem axial unteren Ende des Spulenkerns 5 ist der bereits erwähnte Flansch 1 ausgebildet, der eine ebene Innenfläche 6 und die Unterseite 2 aufweist. Dieser Flansch begrenzt den Raum, der für eine Spule zur Verfügung steht. An dem gegenüberliegenden Ende enthält der Spulenkörper 4 einen zweiten Flansch 7, der in radialer Richtung weniger weit ragt als der untere Flansch 1. Auf den unteren Flansch 1 ist der Schirmring 3 aufgesetzt, dessen obere Stirnkante 8 in einer Ebene mit der Oberseite 9 des oberen Flanschs 7 liegt. Zwischen dem Rand des oberen Flanschs 7 und der Innenseite 10 des Schirmrings 3 ist ein Luftspalt 11 gebildet. Dieser Luftspalt läuft um den gesamten Umfang herum durchgehend.The FIG. 2 to which reference is now made, shows a cross section through the illustrated component along line II-II in FIG. 1 , The component contains a bobbin 4, which in turn contains a coil core 5. This spool core 5 is cylindrical and has a circular cross-section. At the axially lower end of the spool core 5, the already mentioned flange 1 is formed, which has a flat inner surface 6 and the bottom 2. This flange limits the space available for a coil. At the opposite end of the bobbin 4 includes a second flange 7, which projects less far in the radial direction than the lower flange 1. On the lower flange 1 of the shield ring 3 is placed, the upper end edge 8 in a plane with the top 9 of the upper Flange 7 is located. Between the edge of the upper flange 7 and the inner side 10 of the shield ring 3, an air gap 11 is formed. This air gap runs around the entire circumference throughout.

Der untere Flansch 1, dessen Unterseite 2 zur Befestigung mit einer Leiterplatte ausgebildet ist, enthält ein durchgehendes Loch 12, das unmittelbar an den Außenumfang des Spulenkerns 5 anschließt. Es dient dazu, das Ende des die Spule bildenden Drahtes durchzustecken, damit es auf der Unterseite verlötet werden kann.The lower flange 1, whose underside 2 is designed for fastening to a printed circuit board, contains a through hole 12 which adjoins directly to the outer circumference of the spool core 5. It serves to push through the end of the wire forming the coil, so that it can be soldered on the underside.

Wie man der Figur 2 schon entnehmen kann, ruht der Schirmring 3 auf der Innenseite 6 des unteren Flanschs 1 auf. Dies geht deutlicher aus der Figur 3 hervor. Der Schirmring 3 weist an seiner unteren Stirnkante 13 eine nach innen gerichtete Stufe 14 auf. Diese Stufe weist einen parallel zur Stirnkante 13 verlaufenden ersten Schenkel 15 und einen senkrecht dazu verlaufenden parallel zur Außenseite verlaufenden zweiten Schenkel 16 auf. Mit dem ersten Schenkel 15 der Stufe 14 liegt der Schirmring 3 auf der Innenseite 6 des unteren Flanschs 1 auf. Der zweite Schenkel 16 liegt an dem Außenrand 17 des unteren Flanschs 1 an. In Figur 3 ist der Abstand zwischen dem Außenrand 17 und dem Schenkel 16 vergrößert gezeichnet, um das Zusammenwirken deutlicher darzustellen.How to get the FIG. 2 can already be seen, the shield ring 3 rests on the inside 6 of the lower flange 1. This is clearer from the FIG. 3 out. The shield ring 3 has an inwardly directed step 14 at its lower end edge 13. This step has a first leg 15 extending parallel to the end edge 13 and a second leg 16 running perpendicular thereto and running parallel to the outside. With the first leg 15 of the step 14, the shield ring 3 rests on the inner side 6 of the lower flange 1. The second leg 16 abuts against the outer edge 17 of the lower flange 1. In FIG. 3 the distance between the outer edge 17 and the leg 16 is shown enlarged to illustrate the interaction more clearly.

Da die Stufe 14 rings um den gesamten Umfang des Schirmrings 3 herum läuft, ist damit die Verschiebung des Schirmrings 3 gegenüber dem unteren Flansch 1 in alle Richtungen verhindert.Since the step 14 runs around the entire circumference of the shield ring 3 around, so that the displacement of the shield ring 3 relative to the lower flange 1 is prevented in all directions.

Nun zu Figur 4, die das Induktionsbauteil von der Unterseite her zeigt. Die Unterseite 2 ist in drei Bereiche aufgeteilt, nämlich zwei äußere Bereiche mit einer leitenden Beschichtung und einen mittleren Bereich zwischen den beiden beschichteten Bereichen 18, der frei von Beschichtung bleibt. Die Kontur des Außenrands 17 dieses unteren Flanschs 1 weist die Form zweier Kreisbögen auf, die durch zwei geradlinige parallel zueinander verlaufende Abschnitte miteinander verbunden sind. Durch diese von einer Kreisform abweichende Form wird auch eine Verdrehung des Schirmrings 3 gegenüber dem Flansch 1 verhindert.now to FIG. 4 showing the induction component from the bottom. The underside 2 is divided into three areas, namely two outer areas with a conductive coating and a middle area between the two coated areas 18, which remains free of coating. The contour of the outer edge 17 of this lower Flange 1 has the shape of two arcs, which are interconnected by two rectilinear mutually parallel sections. By deviating from a circular shape and a rotation of the shield ring 3 relative to the flange 1 is prevented.

Die Stirnkante 13 des Schirmrings 3 umgibt den Außenrand 17 des unteren Flanschs 1 ringsum.The end edge 13 of the shield ring 3 surrounds the outer edge 17 of the lower flange 1 all around.

Die perspektivische Ansicht der Figur 5 zeigt das Induktionsbauteil von unten. Auch hier ist zu sehen, dass die untere Stirnkante 13 des Schirmrings 3 den Flansch 1 überall umgibt.The perspective view of FIG. 5 shows the induction component from below. Again, it can be seen that the lower end edge 13 of the shield ring 3 surrounds the flange 1 everywhere.

Die Figur 6 zeigt nun in perspektivischer Darstellung das Induktionsbauteil von oben. Hier ist der zwischen dem Flansch 7 und dem Schirmring 3 gebildete Luftspalt 11 zu sehen. Um die korrekte Einhaltung dieses Luftspalts 11 geht es bei der vorliegenden Erfindung.The FIG. 6 now shows a perspective view of the induction component from above. Here, the air gap 11 formed between the flange 7 and the shield ring 3 can be seen. To the correct compliance of this air gap 11, it is in the present invention.

Nun zu der abgeänderten Ausführungsform nach Figur 7. Hier ist ein Spulenkörper 24 dargestellt, bei dem der Spulenkern 25 nur an seinem unteren axialen Ende einen Flansch 11 aufweist, während er im oberen Bereich ohne einen Flansch endet. Dafür weist der Schirmring 23 im Bereich seiner oberen Stirnkante 8 einen nach innen gerichteten ringsum laufenden Schenkel 27 auf. Zwischen der Innenkante dieses Schenkels 27 und der Außenseite des Spulenkerns 25 wird ebenfalls ein Luftspalt 21 gebildet, der in der gleichen Weise in seiner korrekten Größe und Position eingehalten wird wie bei der vorhergehenden Ausführungsform. Auch hierzu dienen die zwischen dem unteren Flansch 1 und dem Schirmring 23 durch die Stufe 14 gebildeten Positioniermittel. Now to the modified embodiment according to FIG. 7 , Here, a bobbin 24 is shown, in which the bobbin 25 has a flange 11 only at its lower axial end, while it ends in the upper region without a flange. For this, the shield ring 23 in the region of its upper end edge 8 on an inwardly directed all-round leg 27. Between the inner edge of this leg 27 and the outside of the spool core 25, an air gap 21 is also formed, which is maintained in the same manner in its correct size and position as in the previous embodiment. Also serve this purpose formed between the lower flange 1 and the shield ring 23 by the step 14 positioning.

Claims (4)

  1. Induction component, comprising
    1.1 a coil body (4, 24) including
    1.2 a coil core (5, 25) for accommodating the coil and
    1.3 at least one flange (1, 7), in particular plate-shaped flange, projecting radially beyond the cylindrical coil core (5, 25),
    1.4 a shielding ring (3) surrounding the coil core (5, 25) at a distance,
    1.5 said shielding ring together with the coil body (4, 24) forming an air gap (11, 21) on at least one location, and comprising
    1.6 positioning means acting between the flange (1) and the shielding ring (3) to ensure the correct size of the air gap (11, 21), wherein
    1.7 the shielding ring (3) has an inner step (14) on its front edge (13) facing the flange (1), with one leg (15) thereof providing an abutment surface for applying onto the flange (1) and with the other leg (16) providing an abutment surface for applying onto the outer rim (17) of the flange (1).
  2. Induction component according to claim 1, wherein the coil body (4) has two flanges (1, 7) arranged at a distance on the coil core (5) and an air gap (11) is formed between the rim edge of one of the flanges (7) and the interior side (10) of the shielding ring (3).
  3. Induction component according to any one of the preceding claims, wherein the outer rim (17) of the flange and the inner contour of the shielding ring (3) both have a non-circular shape.
  4. Induction component according to claim 2 or 3, wherein, with two flanges (1, 7) present, one of the two flanges (1, 7) is provided for fastening to a circuit board and the positioning means are provided between the shielding ring (3) and the flange (1) that is assigned to the circuit board and intended for fastening.
EP11163227.9A 2010-04-28 2011-04-20 Induction component Active EP2383755B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11163227T PL2383755T3 (en) 2010-04-28 2011-04-20 Induction component

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010028325A DE102010028325A1 (en) 2010-04-28 2010-04-28 inductance component

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EP2383755A1 EP2383755A1 (en) 2011-11-02
EP2383755B1 true EP2383755B1 (en) 2015-03-18

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US (1) US8674801B2 (en)
EP (1) EP2383755B1 (en)
JP (1) JP2011233871A (en)
KR (1) KR101757480B1 (en)
CN (1) CN102237180B (en)
AU (1) AU2011201441B2 (en)
BR (1) BRPI1101734B1 (en)
CA (1) CA2737021C (en)
DE (1) DE102010028325A1 (en)
ES (1) ES2534761T3 (en)
HK (1) HK1163929A1 (en)
IL (2) IL212235A (en)
MX (1) MX2011004388A (en)
PL (1) PL2383755T3 (en)
RU (1) RU2569498C2 (en)

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Publication number Priority date Publication date Assignee Title
JP6398302B2 (en) 2014-05-12 2018-10-03 スミダコーポレーション株式会社 Coil parts and electronic circuits
US20200211760A1 (en) * 2018-12-28 2020-07-02 Texas Instruments Incorporated Molded inductor with magnetic core having mold flow enhancing channels

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US4245207A (en) * 1977-05-20 1981-01-13 Toko, Inc. Miniature high frequency coil assembly or transformer
JPH0479404U (en) * 1990-11-21 1992-07-10
JP3497276B2 (en) * 1994-07-20 2004-02-16 松下電器産業株式会社 Inductance element and manufacturing method thereof
JPH11135331A (en) 1997-10-30 1999-05-21 Sumida Denki Kk Inductance part
JP2001006939A (en) * 1999-06-22 2001-01-12 Mitsumi Electric Co Ltd Coil apparatus
US6710693B2 (en) * 2001-03-23 2004-03-23 Nec Tokin Corporation Inductor component containing permanent magnet for magnetic bias and method of manufacturing the same
JP2002313635A (en) * 2001-04-10 2002-10-25 Mitsumi Electric Co Ltd Method of managing gap of inductor
US6847280B2 (en) 2002-06-04 2005-01-25 Bi Technologies Corporation Shielded inductors
JP4372399B2 (en) 2002-09-10 2009-11-25 東京パーツ工業株式会社 Surface mount type choke coil
JP4317394B2 (en) * 2003-07-01 2009-08-19 スミダコーポレーション株式会社 Surface mount inductor
JP4292056B2 (en) * 2003-11-13 2009-07-08 スミダコーポレーション株式会社 Inductance element
JP2006041418A (en) * 2004-07-30 2006-02-09 Toko Inc Plate-mounting coil component
JP4676822B2 (en) * 2005-06-21 2011-04-27 スミダコーポレーション株式会社 Coil parts
JP2007027461A (en) * 2005-07-19 2007-02-01 Sumida Corporation Core and inductor with core
JP4781223B2 (en) * 2005-12-22 2011-09-28 スミダコーポレーション株式会社 Inductance element
JP5309682B2 (en) * 2007-05-25 2013-10-09 スミダコーポレーション株式会社 Inductance element
DE102007063170A1 (en) 2007-12-19 2009-06-25 Würth Elektronik eiSos Gmbh & Co. KG inductance component

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Publication number Publication date
DE102010028325A1 (en) 2011-11-03
US20110267163A1 (en) 2011-11-03
HK1163929A1 (en) 2012-09-14
RU2011115985A (en) 2012-10-27
US8674801B2 (en) 2014-03-18
PL2383755T3 (en) 2015-08-31
IL212235A0 (en) 2011-06-30
BRPI1101734A2 (en) 2015-07-28
CN102237180A (en) 2011-11-09
CA2737021A1 (en) 2011-10-28
CA2737021C (en) 2017-11-21
IL212235A (en) 2014-11-30
EP2383755A1 (en) 2011-11-02
AU2011201441A1 (en) 2011-11-17
MX2011004388A (en) 2011-10-27
KR20110120243A (en) 2011-11-03
BRPI1101734B1 (en) 2019-12-10
AU2011201441B2 (en) 2015-05-28
KR101757480B1 (en) 2017-07-12
ES2534761T3 (en) 2015-04-28
CN102237180B (en) 2016-06-15
RU2569498C2 (en) 2015-11-27
JP2011233871A (en) 2011-11-17
IL212501A0 (en) 2011-07-31

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