EP0357237B1 - Spulenkörper - Google Patents

Spulenkörper Download PDF

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Publication number
EP0357237B1
EP0357237B1 EP89307886A EP89307886A EP0357237B1 EP 0357237 B1 EP0357237 B1 EP 0357237B1 EP 89307886 A EP89307886 A EP 89307886A EP 89307886 A EP89307886 A EP 89307886A EP 0357237 B1 EP0357237 B1 EP 0357237B1
Authority
EP
European Patent Office
Prior art keywords
coil
flange
wire
groove
notch
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
EP89307886A
Other languages
English (en)
French (fr)
Other versions
EP0357237A3 (en
EP0357237A2 (de
Inventor
Eric Buffet
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.)
BorgWarner Transmission Systems Monaco SAM
Original Assignee
Eaton SAM
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 Eaton SAM filed Critical Eaton SAM
Publication of EP0357237A2 publication Critical patent/EP0357237A2/de
Publication of EP0357237A3 publication Critical patent/EP0357237A3/en
Application granted granted Critical
Publication of EP0357237B1 publication Critical patent/EP0357237B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to a coil former, on which fine wire so thin as to be easily fractured, is to be wound and attached at both of its ends to electrical terminals carried by the former.
  • An object of the invention is to provide a former able to protect wire, e.g. of only 0.06 mm or less, that might be coiled thereon and electrically terminated.
  • the invention also relates to the completed encapsulated coil on the former.
  • the exiting parts of the wire are fragile single strands, and tend to be exposed to mechanical or human handling stresses. Furthermore, attempts to protect the coil itself, against both handling and the environment, by coating, can only be helpful if the coating material flows into every crack or gap, which in practice requires injection moulding or pressure feeding synthetic encapsulant material in hot (e.g. 250 degrees C) molten form.
  • the coating process itself can be prejudicial to the thin wire, because the exposed parts of the wire tend to have very vulnerable free unsupported lengths en route to the terminals, or tend to lie with some freedom of movement on an external surface of the coil former.
  • the encapsulation process can form moving waves of hot molten encapsulant which suddenly catch the wire in pulses of pressure, and either move it and break it, or rub it vigorously back and fore on the coil former surface with similar destructive results.
  • more than one coil is wound on one former, which complicates the termination problem further.
  • An object is to provide a former on which even delicately thin wires can be wound, with protection of exiting lengths from rupture against the stresses produced by subsequent pressure moulding or by handling, particularly when two or more terminals therefore are grouped closely together.
  • the insulating former tends to be bobbin shaped, i.e. cylindrical with a radially projecting flange at each end.
  • the two or more terminals are typically embedded in one flange, or are otherwise supported on or near one flange.
  • boths ends of wound wire(s) will exit adjacent this flange, hereinafter referred to as "the flange”. Also both wire ends will need to exit tangentially, to control tension.
  • the flange (4) has an external circumferential grove (13) extending generally in a plane of the flange intermediate its end surfaces (7,8), said groove (13) at its one end terminating adjacent a point (16) of an anchoring terminal (6) where said terminal is just extending free from its own support at, or embedded in, the flange, and said groove (13) at its other end terminating in a notch (12) over which notch a wire end (17) after exiting the coil substantially tangentially can be bent (18) in tension, substantially to reverse its direction and then to follow in a wire length portion (14) along the bottom of said groove over a very short exposed length (15) to an attachment at said extending point (16) of the terminal.
  • bracketed numbers serve for identication of specifically illustrated counterparts.
  • the exciting wire is wound over the notch, along the groove and is wrapped around and/or soldered to the terminal with virtually no exposed length except in the groove bottom where it has negligible freedom of movement.
  • a second exiting wire length (2) can be catered for by the following feature of the former, the flange has a second groove (9) where the flange supports two terminals, so that the second exiting wire length (2) can exit tangentially of the coil (1) and along the bottom of the second groove over a short exposed length (11) to a point (10) of the second terminal (3) just extending from and near support by the flange (4).
  • the whole coil can be effectively encapsulated, and the wires can be taut, and especially one is very well protected by an internal groove.
  • GB-A-1 110 192 although having some similar structure, actually proposes a direction reversal in a sleeved wire, but one wire is already held down with slack by means of insulating tape, and the other wire (before sleeving) is led into a channel resembling a flanged groove without a directional reversal.
  • the channel is so large that it accommodates not only the insulated sleeving, but also a solder joint for joining said other wire to sleeved wire.
  • This disclosure is relatively unconcerned with the miniaturisation of today.
  • a coil 1 wound on a cylindrical former has, tangential thereto, an exiting length 2 which is soldered to a faston 3 embedded in a flange 4 of the former 5.
  • a second faston terminal 6 is also embedded in flange 4 close to the first faston 3.
  • the wire length 2 is wound along the bottom of a groove intermediate the outer surface 7 and the inner surface 8 of flange 4.
  • the groove may be inclined to the general plane of the flange in order to progress the wire from the lower level (as viewed) of the tangential coil exit to the higher level of the faston 3.
  • This part of the wire which is not a primary concern of the invention, can be seen also in Fig 2 which is a plan view towards inner surface 8 of the flange, showing a slot shaped depression 9 providing access to the groove, whose course is visible by the representation of wire 2 in Figs 1 and 2.
  • the wire length leaves the groove close to a point 10 of attachment by solder to faston 3, which point 10 is also close to where the faston is securely embedded in the flange. There is thus only a very short free wire length 11.
  • the second faston 6 is closeby, similarly embedded in the flange.
  • This arrangement is very satisfactory for one length of wire, but does not have room for similar exit of the second end length of wire, which also must exit in tension and tangentially from the coil 1. Accordingly, room is provided by the invention, facilitated by a novel notch 12 and projection 12A provided in the inner surface 8 of the flange through only to a circumferential groove 13 at an intermediate level in the flange, which will now be described in conjunction with Figs 3 and 4.
  • the circumferential groove 13 can be seen occupied by a wire length portion 14 which extends outwardly to become a short free portion 15 before attachment at a point 16 on faston 6.
  • Point 16 lies only close to where Terminal 6 is embedded in the flange 4.
  • the flange extends in thickness each side of the groove, but the aforementioned notch 12 (not visible in Fig 3, only visible in Figs 2 and 4) and projection 12A only extend from the groove 13 down to surface 8.
  • the wire length 17 tangentially leaving the coil 1, is bent in tension is bent around the notch 12 to form a direction reversing portion 18, which is protected against handling and securely retained in position against the pressure encapsulation process by the projecting portion 12A of the flange 4; the bent wire portion 18 then continues outwards successively as said wire length portion 14 in the circumferential groove 13, the short exposed portion 15, and finally attachment at 16.
  • Encapsulation can now take place in relative safety as regards wire fracturing by the hot molten (e.g. 250 degrees C) flowing encapsulant.
  • typical miniature dimensions of a preferred embodiment are as follows.
  • the groove 13 is 0.3 mm wide, the wire-reversing notch 0.5 mm wide, the protecting and retaining projection 12A is 0.8mm in width (taken on the outside of the wire), and the other groove protecting the other wire end 2 is 0.5 mm wide for the most part, tapering to 0.3 mm wide just adjacent faston terminal 3.
  • the tapering assists resistance to movement, while the wider part makes the winding process not quite so critical.
  • the redirecting means 12, 12A for wire portion 18 did not exist, the only way for wire 2 to exit tangentially would be to have two external peripheral grooves in the manner of GB-A-1 574 977 above mentioned. Then there would be no wire section 2 protected in an internal groove, and the wire sections in the external grooves would not be isolated for stresses from the main body of wire in the coil by the redirecting means 12, 12A. These means enable the wire length 14 to be tensioned in isolation, and the short, redirecting length 18 is protected particularly by the projection from handling or encapsulation stresses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Coils Of Transformers For General Uses (AREA)

Claims (6)

  1. Eine Spule und ein Spulenkörper der Flanschbauart, wobei folgendes vorgesehen ist: ein zylindrischer Teil, auf den Draht (1) der Spule gewickelt ist; ein Endflansch (4); eine äußere Umfangsnut (13), die in dem Endflansch angeordnet ist an einer axialen Stelle davon zwischen der Außenseite (7) und der Innenseite (8) des Flanschs, und Kerbmittel (12), die die Nut (13) in dem Flansch mit dem Spulenraum jenseits der Innenfläche (8) des Flansches (4) verbinden,
    dadurch gekennzeichnet, daß die Nut (13) sich von den Kerbmitteln (12) zu einem Punkt benachbart zu einem Anschluß (6) der Anschlüsse (3, 6) erstreckt, die die Spule beenden und die von dem Flansch (4) getragen sind, wobei die Nut einen Anschlußendteil (14) des Hauptdrahtteils enthält, der auf den zylindrischen Teil des Spulenkörpers gewickelt ist, wobei ein mittlerer im wesentlichen tangentialer Drahtteil (17) vorgesehen ist, der aus der Spule austritt und in einer im wesentlichen richtungsumkehrenden Weise umgebogen ist und unter Spannung über die Kerbmittel oder Kerbe (12) gebogen ist und wobei eine kurze freigelegte Länge (15) des Spulendrahts sich von einem benachbarten Punkt zu einem Befestigungspunkt (16) an dem Anschluß (6) erstreckt.
  2. Spule und Spulenkörper gemäß Anspruch 1, wobei ein Vorsprung (12A) benachbart zu der Kerbe vorgesehen ist.
  3. Spule und Spulenkörper gemäß Anspruch 1 oder 2, wobei die Kerbe (12) und der Vorsprung (12A) sich durch die Dicke des Flansches erstrecken, jedoch nur von der Innenoberfläche (8) des Flansches (4) so weit bis zur Nut (13) davon.
  4. Spule und Spulenkörper gemäß Anspruch 1, 2 oder 3, wobei eine weitere Nut vorgesehen ist, die sich von einem Umfangspunkt des Flanschs zwischen den zwei Anschlüssen (3, 6) radial nach innen und zu einem Verbindungspunkt mit der Innenoberfläche (8) des Flansches erstreckt, und wobei eine schlitzförmige Vertiefung (9) vorgesehen ist, die sich von der Außenoberfläche (7) des Flanschs in seine Dicke hinein erstreckt auf die Tiefe der weiteren Nut für einen Zugang zu der Länge der weiteren Nut, wobei die letztere umfangsmäßig benachbart zu dem anderen Anschluß (3) austritt.
  5. Spule und Spulenkörper gemäß Anspruch 4, wobei die weitere Nut sich tangential zu einem Punkt allgemein an einem zylindrischen Teil erstreckt; und wobei die Kerbe (12) benachbart zu einem Punkt auf dem zylindrischen Teil angeordnet ist, an dem der zurückgehaltene Draht austreten würde in einer Richtung tangential zu der Kerbe hin, und im wesentlichen die Richtung umkehren würde, um dem Pfad der ersten Nut zu folgen.
  6. Spule und Spulenkörper gemäß Anspruch 4 oder 5, dadurch gekennzeichnet, daß der Spulenkörper eine Nut besitzt, die zwischen den Anschlüssen (3, 6) angeordnet ist zum Schutz des anderen Drahtendes (2) der Spule auf dem Weg zu einem kurzen freigelegten Drahtteil (11) und zu einer Befestigung an einem Punkt (10) des anderen Anschlusses (3).
EP89307886A 1988-09-02 1989-08-03 Spulenkörper Expired - Lifetime EP0357237B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8821632 1988-09-02
GB888821632A GB8821632D0 (en) 1988-09-02 1988-09-02 Coil former

Publications (3)

Publication Number Publication Date
EP0357237A2 EP0357237A2 (de) 1990-03-07
EP0357237A3 EP0357237A3 (en) 1990-08-01
EP0357237B1 true EP0357237B1 (de) 1993-10-27

Family

ID=10643631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89307886A Expired - Lifetime EP0357237B1 (de) 1988-09-02 1989-08-03 Spulenkörper

Country Status (4)

Country Link
EP (1) EP0357237B1 (de)
DE (1) DE68910239T2 (de)
ES (1) ES2045448T3 (de)
GB (1) GB8821632D0 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT220750Z2 (it) * 1990-12-11 1993-11-08 Veglia Borletti Srl Bobina elettrica e relativo metodo di fabbricazione
IT220749Z2 (it) * 1990-12-11 1993-11-08 Veglia Borletti Srl Bobina elettrica e relativo metodo di fabbricazione
GB2340667B (en) * 1998-05-29 2000-04-12 Electronic Tech Housing for an electronic component

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1110192A (en) * 1965-07-06 1968-04-18 Heinemann Electric Co Improved coil and spool and an improved method of making a coil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461413A (en) * 1966-11-10 1969-08-12 Teletype Corp Shielded electrical inductor component
US4041430A (en) * 1976-03-08 1977-08-09 Guardian Electric Manufacturing Co. Coil bobbin and matching cover for solenoid assembly
US4086553A (en) * 1977-06-13 1978-04-25 Whirlpool Corporation Coil assembly structure
US4672348A (en) * 1985-02-19 1987-06-09 Eaton Corporation Electrical coil assembly and terminal therefor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1110192A (en) * 1965-07-06 1968-04-18 Heinemann Electric Co Improved coil and spool and an improved method of making a coil

Also Published As

Publication number Publication date
EP0357237A3 (en) 1990-08-01
ES2045448T3 (es) 1994-01-16
DE68910239D1 (de) 1993-12-02
EP0357237A2 (de) 1990-03-07
GB8821632D0 (en) 1988-10-12
DE68910239T2 (de) 1994-03-03

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