EP0178456B1 - Bobbin - Google Patents

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Publication number
EP0178456B1
EP0178456B1 EP85111424A EP85111424A EP0178456B1 EP 0178456 B1 EP0178456 B1 EP 0178456B1 EP 85111424 A EP85111424 A EP 85111424A EP 85111424 A EP85111424 A EP 85111424A EP 0178456 B1 EP0178456 B1 EP 0178456B1
Authority
EP
European Patent Office
Prior art keywords
winding
plastic clip
coil
clip
inner connecting
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
Application number
EP85111424A
Other languages
German (de)
French (fr)
Other versions
EP0178456A1 (en
Inventor
Günther Horn
Heribert Dipl.-Ing. Röser (FH)
Wolfgang Pieper
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.)
Siemens AG
Original Assignee
Siemens 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 AG filed Critical Siemens AG
Publication of EP0178456A1 publication Critical patent/EP0178456A1/en
Application granted granted Critical
Publication of EP0178456B1 publication Critical patent/EP0178456B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • H01F2005/046—Details of formers and pin terminals related to mounting on printed circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor

Definitions

  • the invention relates to a method for producing a coil former according to the preamble of claim 1; such a method is known from DE-C 2 758 700.
  • tongue-shaped plugs are to be inserted and cast into the mold when the coil body is injection molded with the hinge-like molded plastic bracket;
  • the winding ends of the excitation coil wound into the coil former are connected to the radially inward projecting inner connection ends;
  • a plug connected to an outer connecting line can be plugged onto the radially outwardly projecting outer connecting ends of the injected connecting pins.
  • the manufacture of the coil body and the safe strain-relieved contact between the winding ends of the coil wound on the coil body on the one hand and the line ends of the outer connecting line on the other hand, in particular with a view to automated manufacturing and assembly, are simplified.
  • the bobbin with the hinge-like molded plastic bracket can first be produced in a technically simple manner as a simple injection molding universal part without adjusting pins to be held in the mold and injected;
  • the connecting pins with their inner connecting ends previously provided simply by bending with a position-securing stop, can then be inserted up to the strain-relieved stop of the transverse intermediate piece and can be wrapped with the winding ends during machine insertion of the winding onto the winding body and optionally by dip soldering can also be contacted.
  • the plastic bracket After the plastic bracket has been folded back over the winding wrapped in the coil body and locked in place on the opposite end flange of the coil body, the plastic bracket then additionally forms an insulated passage for the outer connection ends when the coil is in a surrounding motor housing, e.g. a stepper motor, inserted and the outer connecting line for the coil is plugged onto the outer connecting ends of the plastic bracket by means of a connected plug.
  • a surrounding motor housing e.g. a stepper motor
  • connection pins For simple additional fixation of the connection pins after their insertion into the plastic bracket, their outstanding, still unwound inner connection ends are axially concentrically twisted relative to their part inserted into the plastic bracket directly above the fitting opening by a certain circumferential angle while maintaining their flat-tongue-shaped outer plug-on end; as a result, the connecting pins tighten themselves in the plastic bracket, on which they are then firmly pressed on the one hand via the transverse intermediate piece on the top and on the other hand via the piece of the outer connection end twisted in the transverse direction on the underside of the plastic bracket.
  • FIG. 1 shows in a partial sectional view an annular plastic bobbin 1, the winding space of which is axially delimited by a circumferential end flange 11 and 12, respectively.
  • An excitation winding 6 is wrapped in the winding space delimited axially by the end flanges 11, 12.
  • a plastic bracket 2 is integrally molded onto the radially outer edge of the right end flange 11 of the coil former 1 via a hinge-like joint.
  • the plastic bracket 2 can - as can be seen from Fig.2 - after the winding connection to the left about its hinge joint folded over the winding 6 and locked by means of molded locking cams 23, 24 with integrally formed on the left end flange 12 locking webs 121, 122 and so in its Fig. 2 operational location shown.
  • a passport is also cast into the plastic bracket 2 openings two flat tongue-shaped connecting pins 3.4 inserted.
  • the flat tongue-shaped connecting pins 3 and 4 each protrude with an outer connecting end 31 and 41 from the top 21 and with an inner connecting end 32 and 42 from the bottom 22 of the plastic bracket 2.
  • the coil former 1 is expediently rotated about its coil axis to such an extent that the inner connection ends 32 and 42 with the winding ends 61, 62 are directed downward and are therefore easily immersed in a solder bath.
  • the inner connection ends 32 and 42 are expediently arranged on the underside 21 of the plastic bracket 2 at the greatest possible mutual distance in order to ensure good accessibility of the thread guide during the mechanical winding around the winding ends 61, 62 around the inner connection ends 32 and 42.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Particle Accelerators (AREA)

Description

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung eines Spulenkörpers gemäß Oberbegriff des Anspruchs 1; ein derartiges Verfahren ist aus der DE-C 2 758 700 bekannt.The invention relates to a method for producing a coil former according to the preamble of claim 1; such a method is known from DE-C 2 758 700.

Im bekannten Fall sind bei der Spritzguß-Herstellung des Spulenkörpers mit dem scharnierartig angeformten Kunststoffbügel in die Gußform zungenförmige Stecker einzulegen und miteinzugießen; in der Betriebsstellung des über den Wickelraum um seine Scharnierachse an dem einen Stirnflansch umgeklappten und an dem anderen Stirnflansch verrasteten Kunststoffbügels sind an den nach radial innen herausragenden inneren Anschlußenden die Wicklungsenden der in den Spulenkörper eingewickelten Erregerspule angeschlossen; auf die nach radial außen herausragenden äußeren Anschlußenden der eingespritzten Anschlußstifte kann ein mit einer äußeren Anschlußleitung verbundener Stecker aufgesteckt werden.In the known case, tongue-shaped plugs are to be inserted and cast into the mold when the coil body is injection molded with the hinge-like molded plastic bracket; In the operating position of the plastic bracket folded over the hinge axis about its hinge axis on one end flange and locked on the other end flange, the winding ends of the excitation coil wound into the coil former are connected to the radially inward projecting inner connection ends; a plug connected to an outer connecting line can be plugged onto the radially outwardly projecting outer connecting ends of the injected connecting pins.

Durch die DE-A 2 159 810 ist weiterhin ein Spulenkörper mit zumindest an einem Stirnflansch außen fest angeformter Leiste mit Schlitzen zur Aufnahme von Lötschwertern bekannt, an deren eines Ende die Spulenwicklung und an deren anderes Ende äußere Anschlußleitungen angelötet werden. Zur Lagesicherung sind die flachzungenförmigen Lötschwerter mit einer angestanzten Schulter versehen, die von einer speziell in die Schlitze eingearbeiteten Erweiterung aufgenommen werden. Die für den Anschluß der äußeren Anschlußleitungen vorgesehenen Enden der Lötschwerter werden nach dem Einstecken in die Leiste rechtwinklig abgebogen und gegebenenfalls anschließend tordiert.From DE-A 2 159 810 a coil body with at least on a front flange firmly molded bar with slots for receiving soldering tabs is known, at one end of the coil winding and at the other end external connection lines are soldered. To secure their position, the flat-tongue-shaped soldering swords are provided with a punched-out shoulder, which is received by a specially integrated extension in the slots. The ends of the soldering tabs provided for the connection of the outer connecting lines are bent at right angles after insertion into the strip and, if necessary, then twisted.

Gemäß Aufgabe der vorliegenden Erfindung soll die Herstellung des Spulenkörpers und die sichere zugentlastete Kontaktierung zwischen den Wicklungsenden der auf den Spulenkörper aufgewickelten Spule einerseits und den Leitungsenden der äußeren Anschlußleitung andererseits, insbesondere im Hinblick auf eine automatengerechte Fertigungsherstellung und Montage, vereinfacht werden.According to the object of the present invention, the manufacture of the coil body and the safe strain-relieved contact between the winding ends of the coil wound on the coil body on the one hand and the line ends of the outer connecting line on the other hand, in particular with a view to automated manufacturing and assembly, are simplified.

Die Lösung dieser Aufgabe gelingt bei einem Spulenkörper der eingangs genannten Art durch die Lehre des Anspruchs 1.This object is achieved in the case of a coil former of the type mentioned at the outset by the teaching of claim 1.

Vorteilhafte Ausgestaltungen der Erfindung sind jeweils Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.

Erfindungsgemäß kann in herstellungstechnisch einfacher Weise zunächst der Spulenkörper mit dem scharnierartig angeformten Kunststoffbügel als einfaches Spritzguß-Universalteil ohne justiert in der Gußformen zu haltende und miteinzuspritzende Anschlußstifte hergestellt werden; in automatengerecht einfacher Montageweise können anschließend die auf einfache Weise zuvor lediglich durch Abbiegen mit einem lagesichernden Anschlag versehenen Anschlußstifte mit ihren inneren Anschlußenden bis zum zugentlasteten Anschlag des quergerichteten Zwischenstücks eingeschoben und bei der maschinellen Einbringung der Wicklung auf den Spulenkörper mit den Wicklungsenden umschlungen und gegebenenfalls durch Tauchlöten zusätzlich kontaktiert werden. Nach dem Zurückklappen des Kunststoffbügels über die in den Spulenkörper eingewickelte Wicklung und dessen Verrastung am gegenüberliegenden Stirnflansch des Spulenkörpers bildet dann der Kunststoffbügel zusätzlich eine isolierte Durchführung für die äußeren Anschlußenden, wenn die Spule in ein umgebendes Motorgehäuse, z.B. eines Schrittmotors, eingefügt und die äußere Anschlußleitung für die Spule mittels eines angeschlossenen Steckers auf die äußeren Anschlußenden des Kunststoffbügels aufgesteckt wird.According to the invention, the bobbin with the hinge-like molded plastic bracket can first be produced in a technically simple manner as a simple injection molding universal part without adjusting pins to be held in the mold and injected; In a simple manner suitable for automated assembly, the connecting pins with their inner connecting ends, previously provided simply by bending with a position-securing stop, can then be inserted up to the strain-relieved stop of the transverse intermediate piece and can be wrapped with the winding ends during machine insertion of the winding onto the winding body and optionally by dip soldering can also be contacted. After the plastic bracket has been folded back over the winding wrapped in the coil body and locked in place on the opposite end flange of the coil body, the plastic bracket then additionally forms an insulated passage for the outer connection ends when the coil is in a surrounding motor housing, e.g. a stepper motor, inserted and the outer connecting line for the coil is plugged onto the outer connecting ends of the plastic bracket by means of a connected plug.

Zur einfachen zusätzlichen Fixierung der Anschlußstifte nach ihrem Einstecken in den Kunststoffbügel werden deren herausragende, noch unbewickelten inneren Anschlußenden gegenüber ihrem in den Kunststoffbügel eingesteckten Teil unmittelbar über der Paßöffnung um einen bestimmten Umfangswinkel bei Beibehaltung ihres flachzungenförmigen äußeren Aufsteckendes achskonzentrisch tordiert; dadurch ziehen sich die Anschlußstifte in dem Kunststoffbügel selbst fest, an dem sie dann einerseits über das quergerichtete Zwischenstück an der Oberseite und andererseits über das in Querrichtung tordierte Stück des äußeren Anschlußendes auf der Unterseite des Kunststoffbügels fest angedrückt sind.For simple additional fixation of the connection pins after their insertion into the plastic bracket, their outstanding, still unwound inner connection ends are axially concentrically twisted relative to their part inserted into the plastic bracket directly above the fitting opening by a certain circumferential angle while maintaining their flat-tongue-shaped outer plug-on end; as a result, the connecting pins tighten themselves in the plastic bracket, on which they are then firmly pressed on the one hand via the transverse intermediate piece on the top and on the other hand via the piece of the outer connection end twisted in the transverse direction on the underside of the plastic bracket.

Die Erfindung sowie weitere vorteilhafte Ausgestaltungen der Erfindung werden im folgenden anhand eines schematisch dargestellten Ausführungsbeispiels in der Zeichnung näher erläutert. Darin zeigen:

  • Fig. 1 im Teil-Schnittbild einen Spulenkörper mit seitlich weggeklapptem Kunststoffbügel und anschlossenen Wicklungsenden;
  • Fig. 2 die Anordnung gemäß Fig.1 mit zurückgeklapptem und am gegenüberliegenden Stirnflansch festgelegten Kunststoffbügel;
  • Fig. 3 die Unteransicht des weggeklappten Kunststoffbügels in Fig.1;
  • Fig. 4 den weggeklappten Kunststoffbügel gemäß Schnittverlauf IV-IV in Fig.3;
  • Fig. 5 die Oberansicht des weggeklappten Kunststoffbügels in Fig.1.
The invention and further advantageous embodiments of the invention are explained in more detail below with reference to a schematically illustrated embodiment in the drawing. In it show:
  • 1 is a partial sectional view of a coil former with a plastic bracket which is folded away to the side and connected winding ends;
  • 2 shows the arrangement according to FIG. 1 with the plastic bracket folded back and fixed on the opposite end flange;
  • 3 shows the bottom view of the folded-away plastic bracket in FIG. 1;
  • Figure 4 shows the folded away plastic bracket according to section IV-IV in Figure 3;
  • 5 shows the top view of the folded-away plastic bracket in FIG. 1.

Fig.1 zeigt in einem Teil-Schnittbild einen ringförmigen Kunststoff-Spulenkörper 1, dessen Wickelraum axial durch je einen umlaufenden Stirnflansch 11 bzw.12 begrenzt ist. In den axial durch die Stirnflansche 11,12 begrenzten Wickelraum ist eine Erregerwicklung 6 eingewickelt. An den radial äußeren Rand des rechten Stirnflansches 11 des Spulenkörpers 1 ist über ein scharnierartiges Gelenk ein Kunststoffbügel 2 einstückig mitangespritzt. Der Kunststoffbügel 2 kann - wie aus Fig.2 ersichtlich - nach dem Wicklungsanschluß nach links um sein Scharniergelenk über die Wicklung 6 geklappt und mittels angeformter Rastnocken 23,24 mit an dem linken Stirnflansch 12 einstückig angeformten Raststegen 121, 122 verrastet und derart in seiner in Fig.2 dargestellten betriebsmäßigen Lage festgelegt werden.1 shows in a partial sectional view an annular plastic bobbin 1, the winding space of which is axially delimited by a circumferential end flange 11 and 12, respectively. An excitation winding 6 is wrapped in the winding space delimited axially by the end flanges 11, 12. A plastic bracket 2 is integrally molded onto the radially outer edge of the right end flange 11 of the coil former 1 via a hinge-like joint. The plastic bracket 2 can - as can be seen from Fig.2 - after the winding connection to the left about its hinge joint folded over the winding 6 and locked by means of molded locking cams 23, 24 with integrally formed on the left end flange 12 locking webs 121, 122 and so in its Fig. 2 operational location shown.

Zur Kontaktierung zwischen den Wickelenden 61,62 der Erregerspule 6 und der hier nicht dargestellten äußeren Anschlußleitung sind in den Kunststoffbügel 2 in entsprechend miteingegossene Paßöffnungen zwei flachzungenförmigen Anschlußstifte 3,4 eingesteckt. Die flachzungenförmigen Anschlußstifte 3 bzw.4 ragen jeweils mit einem äußeren Anschlußende 31 bzw.41 aus der Oberseite 21 und mit einem inneren Anschlußende 32 bzw.42 aus der Unterseite 22 des Kunststoffbügels 2 heraus.To make contact between the winding ends 61, 62 of the excitation coil 6 and the outer connecting line (not shown here), a passport is also cast into the plastic bracket 2 openings two flat tongue-shaped connecting pins 3.4 inserted. The flat tongue-shaped connecting pins 3 and 4 each protrude with an outer connecting end 31 and 41 from the top 21 and with an inner connecting end 32 and 42 from the bottom 22 of the plastic bracket 2.

Wie insbes. aus Fig.4 ersichtlich, ist zur Lagefixierung der in den Kunststoffbügel 2 eingesteckten Anschlußstifte 3 bzw.4 vorgesehen, daß diese an der Oberseite 21 des Kunststoffbügels 2 mit einem quergerichteten, die Paßöffnung übergreifenden Zwischenstück 33 bzw.43 zwischen dem inneren Anschlußende 32 bzw.42 und dem äußeren Anschlußende 31 bzw.41 und andererseits durch das Tordieren des inneren Anschlußendes 32 bzw.42 die Paßöffnung in Querrichtung auch an der Unterseite 22 des Kunststoffbügels 2 fest anliegen.As can be seen in particular from FIG. 4, for fixing the position of the connecting pins 3 and 4 inserted into the plastic bracket 2, it is provided that they are connected to the top 21 of the plastic bracket 2 with a transversely directed intermediate piece 33 and 43 between the inner connection end, which overlaps the fitting opening 32 or 42 and the outer connection end 31 or 41 and, on the other hand, by twisting the inner connection end 32 or 42, the fitting opening in the transverse direction also abuts firmly on the underside 22 of the plastic bracket 2.

Fig.4 zeigt das innere Anschlußende 42 nach der Tordierung; vor der Tordierung liegt dieses flächig in der gleichen Ebene wie der in der Paßöffnung des Kunststoffbügels 2 eingezeichnete Teil des inneren Anschlußendes 42 des in Fig.4 lediglich sichtbaren flachzungenförmigen Anschlußstiftes 4.4 shows the inner connection end 42 after twisting; before the twisting, this lies flat in the same plane as the part of the inner connecting end 42 of the flat tongue-shaped connecting pin 4 which is only visible in FIG. 4 and is drawn in the fitting opening of the plastic bracket 2.

Fig.1 zeigt die Position des Kunststoffbügels 2 in seitlich weggekippter Lage, in der die inneren Anschlußenden 32 ; 42 von dem den Wicklungsdraht der Spulenwicklung 6 haltenden Fadenführer mit dem Wicklungsanfang bzw. dem Wicklungsende der Spulenwicklung 6 leicht zugänglich umwickelt werden können. Durch Tauchlöten dieser überstehenden inneren Anschlußenden 32 bzw.42 mit den umwickelten Wicklungsenden 61,62 kann die elektrische Kontaktierung noch verbessert werden; dazu wird zweckmäßigerweise der Spulenkörper 1 um seine Spulenachse soweit gedreht, daß die inneren Anschlußenden 32 bzw.42 mit den Wicklungsenden 61,62 nach unten gerichtet sind und somit leicht in ein Lötbad eintauchbar sind. Zweckmäßigerweise sind die inneren Anschlußenden 32 bzw.42 an der Unterseite 21 des Kunststoffbügels 2 in maximal größtem gegenseitigen Abstand angeordnet, um eine gute Zugänglichkeit des Fadenführers bei der maschinellen Umwicklung der Wicklungsenden 61,62 um die inneren Anschlußenden 32 bzw.42 gewährleisten zu können.1 shows the position of the plastic bracket 2 in a laterally tilted position, in which the inner connection ends 32; 42 can be wrapped easily accessible by the thread guide holding the winding wire of the bobbin winding 6 with the winding start or the winding end of the bobbin winding 6. The electrical contacting can be further improved by dip-soldering these projecting inner connection ends 32 and 42 with the wound winding ends 61, 62; For this purpose, the coil former 1 is expediently rotated about its coil axis to such an extent that the inner connection ends 32 and 42 with the winding ends 61, 62 are directed downward and are therefore easily immersed in a solder bath. The inner connection ends 32 and 42 are expediently arranged on the underside 21 of the plastic bracket 2 at the greatest possible mutual distance in order to ensure good accessibility of the thread guide during the mechanical winding around the winding ends 61, 62 around the inner connection ends 32 and 42.

Durch den erfindungsgemäß aufgebauten Spulenkörper ist es also möglich, mit nur wenigen einfachen Montageschritten in den Wickelstützpunkten der in dem von einer frei zugänglichen Wickelstellung in seine Betriebsstellung schwenkbaren Kunststoffbügel gehaltenen Anschlußstifte die Wicklungsenden der auf den Spulenkörper aufgewickelten Spule einerseits und die äußere Anschlußleitung andererseits elektrisch sicher und mechanisch zugentlastet zu verbinden.Due to the bobbin constructed according to the invention, it is thus possible with only a few simple assembly steps in the winding support points of the connecting pins held in the plastic bracket which can be pivoted from its freely accessible winding position into its operating position, the winding ends of the coil wound on the bobbin on the one hand and the outer connecting line on the other hand electrically safely and mechanically relieved to connect.

Claims (3)

1. Method for the production of a coil body (1), having a U-shaped winding space for a coil (6), which winding space is open radially outward and is limited axially by front flanges (11, 12), and having a plastic clip (2), which can be folded over the winding space and is integrally moulded on to one front flange (11) in the manner of a hinge, with one-piece connecting pins (3, 4) held therein which have outer connecting ends (31, 41) which project radially outward from the plastic clip (2), for outer connecting leads, and inner connecting ends (32, 42) which project radially inward for winding ends (61, 62) of the coil (6), which plastic clip (2) first, for making contact with the winding ends (61, 62) of the coil (6), is swung to the side, away from the winding space, and then, with the winding ends (61, 62) in contact, is swung toward the other front flange (12) and is secured to it, characterised in that the connecting pins (3, 4), which have a flat tongue-shaped, outer clip-on end, are pushed through, with their respective inner connecting ends (32, 42), from the upper side (21) of the plastic clip (2) into location holes which pass through in the radial direction, until the said connecting pins lie, with a transverse intermediate piece (33, 43) which overlaps the location hole, against the upper side (21) of the plastic clip (2) in the sense of a strain-bearing support, and then the still unwound, inner connecting ends (32, 42) which project from the plastic clip (2) are twisted in relation to the part of them inserted in the plastic clip (2), directly over the location hole, with the retention of a flat tongue-shaped outer clip-on end, at a specified peripheral angle, axially concentrically to the location hole.
2. Method for the production of a coil body according to claim 1, characterised by an arrangement of the inner connecting ends (32, 42) on the underside (21) of the plastic clip (2) at the greatest maximum distance from each other.
3. Method for the production of a coil body according to claim 1 or 2, characterised in that the inner connecting ends (32, 42) are bent away from each other in order to increase the distance between them.
EP85111424A 1984-09-29 1985-09-10 Bobbin Expired EP0178456B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3435887 1984-09-29
DE19843435887 DE3435887A1 (en) 1984-09-29 1984-09-29 BOBBIN

Publications (2)

Publication Number Publication Date
EP0178456A1 EP0178456A1 (en) 1986-04-23
EP0178456B1 true EP0178456B1 (en) 1989-12-06

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EP85111424A Expired EP0178456B1 (en) 1984-09-29 1985-09-10 Bobbin

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US (1) US4646047A (en)
EP (1) EP0178456B1 (en)
JP (1) JPS6185804A (en)
DE (2) DE3435887A1 (en)

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Publication number Publication date
US4646047A (en) 1987-02-24
JPS6185804A (en) 1986-05-01
DE3574648D1 (en) 1990-01-11
DE3435887A1 (en) 1986-04-10
EP0178456A1 (en) 1986-04-23

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