EP0743659A1 - Corps de bobine, en particulier pour relais de petite dimension, et son procédé de fabrication - Google Patents

Corps de bobine, en particulier pour relais de petite dimension, et son procédé de fabrication Download PDF

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Publication number
EP0743659A1
EP0743659A1 EP96106859A EP96106859A EP0743659A1 EP 0743659 A1 EP0743659 A1 EP 0743659A1 EP 96106859 A EP96106859 A EP 96106859A EP 96106859 A EP96106859 A EP 96106859A EP 0743659 A1 EP0743659 A1 EP 0743659A1
Authority
EP
European Patent Office
Prior art keywords
coil
mold
coil tube
winding
tube
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.)
Granted
Application number
EP96106859A
Other languages
German (de)
English (en)
Other versions
EP0743659B1 (fr
Inventor
Alfred Heinzl
Heinz Stadler
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 EP0743659A1 publication Critical patent/EP0743659A1/fr
Application granted granted Critical
Publication of EP0743659B1 publication Critical patent/EP0743659B1/fr
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
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/44—Magnetic coils or windings
    • H01H2050/446—Details of the insulating support of the coil, e.g. spool, bobbin, former

Definitions

  • the invention relates to a coil former, in particular for small relays, made of insulating material, consisting of a coil tube as a winding support with an axially continuous core opening and a flange integrally formed in the area of each end of the coil tube.
  • the invention also relates to a method for producing such a coil former.
  • Coil bodies for relays are generally molded using injection molding tools, the outer contours being designed using two mold halves, while the axially continuous core opening is produced using so-called core pulls, that is to say specially driven slides in the mold.
  • core pulls that is to say specially driven slides in the mold.
  • the aim of the present invention is to provide a coil former and to provide a manufacturing method for such a coil former which can be produced in a simple two-part injection mold without relatively moving parts and which can be processed further in the same way as conventionally produced coil forms, e.g. B. by plugging onto a mandrel and by winding the winding ends to pins in the coil flange.
  • this object is achieved in a bobbin of the type mentioned at the outset in that the core opening is formed by a plurality of radial recesses which alternately engage in the bobbin tube in opposite directions and which connect to one another without a gap and overlap one another in the region of the central axis of the bobbin tube.
  • This bobbin is produced according to the invention with a two-part mold, the mold parting plane of which runs through or parallel to the coil axis, the outer contour of the bobbin being predetermined by the two mold halves and by protruding mold projections alternately in the radial direction from the two mold halves in the axial region of the mold cavity a continuously filled core area is formed which, after filling the remaining cavities with plastic and separating the mold halves, results in the desired continuous core opening.
  • the bobbin formed according to the invention accordingly has an insulating material that is held together over the entire circumference Coil tube, even if its walls are alternately interrupted on opposite sides.
  • the bobbin can therefore be plugged onto a normal winding mandrel for winding and it can take up a conventional axially inserted core after winding.
  • the interruptions mentioned in the wall of the coil tube do not interfere with winding and do not significantly reduce the stability of the coil body.
  • the insulation distance between the winding and the core is also ensured, in particular in the case of a rectangular or approximately rectangular cross section of the coil tube.
  • the length of each interruption depends on the number of approaches alternately provided in both mold halves; it can be chosen according to the desired design of the coil former and the desired size of individual cavities depending on the flow behavior of the insulating material.
  • the winding wire can be guided from a connecting pin directly to the lowest winding position without being squeezed by the turns lying above it. Strain relief is also possible by simply pushing the connecting pin.
  • the design of the bobbin according to the invention and the corresponding manufacturing process make the injection mold much easier and cheaper than in the production of conventional bobbins.
  • the mold cavities for the simultaneous formation of a large number of coil formers can be arranged very close to one another because of the lack of additionally driven moving parts. This also shortens the runner channels, and a larger number of bobbins can be produced in one injection molding cycle.
  • the coil former 1 shown in FIGS. 1 to 3 is injection molded entirely from plastic. It consists of a coil tube 2 with flanges 3 and 4 formed on the end regions of the winding space and end flanges 5 and 6.
  • the coil body has an axial core opening 7 over its entire length, which is formed by radial recesses which alternately engage in the coil tube.
  • three such radial recesses are provided, namely a radial recess 7a extending from the top over the entire length of the winding from the flange 3 to the flange 4 and two radial recesses engaging in the flange extensions 5 and 6 from below 7b and 7c.
  • the coil tube has coherent wall elements over its entire circumference, which are interrupted by the window-shaped recesses 7a, 7b and 7c once from one side and from the other side, but nevertheless provide the necessary stability for the coil tube and the attachment of the Allow bobbin on a mandrel.
  • the rectangular cross-section of the coil tube 2 also ensures that the lower winding layer remains tensioned over the recess 7a at the same height as if the coil tube 2 also had a closed wall on its upper side.
  • plug-in channels 9 for winding pins 10 are recessed.
  • the winding connection pins 10 are inserted subsequently, as is indicated in FIG. 1 (this pin is not shown in FIGS. 2 and 3). Due to the fact that the radial recess 7a extends into the region of the flange 4, the winding wire 11 can be guided from the winding connecting pin 10 directly through the recess in the flange 4 to the lowest winding layer 8. The coil wire can therefore not be squeezed by the turns 12 lying above it. Also, no breakthroughs can be made. Strain relief is also possible.
  • the connecting pin 10 is first brought into the dashed position designated 10 'and wound with the beginning of the wire. After winding, the connecting pin is moved downwards by the distance "h", which loosens the tension at the beginning of the wire.
  • the manufacture of the coil former is briefly explained again with reference to FIG. 5.
  • the coil former 21 shown here is shown in longitudinal section similar to that in FIG. 1.
  • the coil tube 22 is penetrated in this case by five radial recesses 27a to 27e to form the core opening 27.
  • the coil former is still shown inside the injection mold, this mold consisting of a lower mold half 15 and an upper mold half 16.
  • the mold parting plane 17 runs parallel to the axis and in the vicinity of the axis of the bobbin 21.
  • the radial recesses 27a, 27c and 27e on the underside of the bobbin are produced by attachments of the lower mold half 15, namely the attachments 15a, 15b and 15c, while those of radial recesses 27b and 27d engaging at the top are produced by shoulders 16a and 16b of the upper mold half 16.
  • the coil tube 22 is formed from plastic. Then the mold is opened and the finished bobbin can be further processed.
  • displacement ribs 23 are also shown within the coil tube 22, which serve to clamp the core in the coil body. They can be produced in any desired shape in a particularly simple manner by the radial lugs 15a to 16b of the injection mold.
  • FIGS. 6 and 7 show a particularly favorable arrangement for jointly shaping several coil formers. Due to the simple design without a relatively movable cross slide, the individual mold cavities can be arranged close to each other.
  • 6 shows a series of coils 1, which are arranged in parallel next to one another and are injection-molded, and which initially remain connected via two sprue bars 18 and are thus easy to handle for further processing.
  • FIG. 7 shows an arrangement of coil formers 1 in one Double row with a common middle sprue 18.
  • the sprue has a molded-on eyelet 19 on one side and a molded button 20 on the other end.
  • the injection mold there is a receptacle in which the last sprayed strip piece is located and with the button 20 in the mold cavity protrudes.
  • the subsequently hosed strip piece connects to the previous one, ie the eyelet 19 of the subsequent strip connects to the button 20 of the previous strip, so that the successive injection molding cycles result in an endless belt that can be processed very cheaply in
  • FIG. 8 shows a coil body 31 in a cross section through its coil tube 32, in which the coil tube 32 is open in the area of the winding on two opposite longitudinal sides.
  • the remaining longitudinal sides 32a only exceed the height of the core opening 37 or the core 33 by a very small height dimension "b" at the top and bottom.
  • this coil former 31 is also constructed like the coil former 1 in FIGS. 1 to 3.
  • FIG. 41 A somewhat modified coil former is shown in perspective in FIG.
  • This coil former 41 has a coil tube 42 which has three recesses 7a, 7b and 7c on the upper side and four recesses 7d, 7e, 7f and 7g offset to the lower side.
  • the flanges 43 and 44 are partly broken through on the top and partly on the bottom by the recesses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Insulating Of Coils (AREA)
EP96106859A 1995-05-18 1996-04-29 Corps de bobine, en particulier pour relais de petite dimension, et son procédé de fabrication Expired - Lifetime EP0743659B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19518349 1995-05-18
DE19518349A DE19518349C1 (de) 1995-05-18 1995-05-18 Spulenkörper, insbesondere für Kleinrelais sowie Verfahren zu dessen Herstellung

Publications (2)

Publication Number Publication Date
EP0743659A1 true EP0743659A1 (fr) 1996-11-20
EP0743659B1 EP0743659B1 (fr) 1998-07-22

Family

ID=7762303

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96106859A Expired - Lifetime EP0743659B1 (fr) 1995-05-18 1996-04-29 Corps de bobine, en particulier pour relais de petite dimension, et son procédé de fabrication

Country Status (4)

Country Link
US (1) US5781287A (fr)
EP (1) EP0743659B1 (fr)
JP (1) JPH08330168A (fr)
DE (2) DE19518349C1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7126450B2 (en) * 1999-06-21 2006-10-24 Access Business Group International Llc Inductively powered apparatus
JP2001346365A (ja) * 2000-06-01 2001-12-14 Sumitomo Heavy Ind Ltd リニアモータ用コイルユニットの単体コイル、その巻き取り、成型方法及び装置、及びコイルユニットの成形、製造方法
EP1593133A2 (fr) * 2003-02-04 2005-11-09 Access Business Group International LLC Ensemble bobine inductive
JP2006351284A (ja) * 2005-06-14 2006-12-28 Matsushita Electric Works Ltd 電磁リレーの電磁石ブロックおよび電磁リレー
CN105355419B (zh) * 2015-11-15 2017-05-31 艾柯电器（苏州）有限公司 一种绕线模具

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6903063U (de) 1969-01-28 1969-11-06 Sel Kontakt Bauelemente G M B Spulenkoerper
DE2064826A1 (de) * 1970-02-23 1971-09-16 Ericsson Telefon Ab L M Spulenkörper fur Flachrelais
BE880922A (nl) * 1979-12-28 1980-06-30 Bell Telephone Mfg Spoelvorm
GB2089764A (en) * 1980-11-25 1982-06-30 Legrand Sa Coil former for transformer
JPS5826772A (ja) * 1981-08-04 1983-02-17 Canon Electronics Inc コイルボビン
CH657473A5 (en) * 1982-12-22 1986-08-29 Gfeller Ag Coil former for winding with an electrically insulated conductor
DE3835105C2 (fr) 1988-01-26 1990-09-13 Fuji Electric Co., Ltd., Kawasaki, Kanagawa, Jp

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428826A (en) * 1944-10-27 1947-10-14 Shure Bros Coil and support construction
DE6907606U (de) * 1969-02-26 1969-11-13 Sel Kontakt Bauelemente G M B Spulenkoerper
JPS59103316A (ja) * 1982-12-06 1984-06-14 Kijima Musen Kk 電気巻線部品
JPS62140402A (ja) * 1985-12-14 1987-06-24 Omron Tateisi Electronics Co スプ−ル
US4891620A (en) * 1988-07-22 1990-01-02 Cheng Bruce C H Insulating tubeless transformer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6903063U (de) 1969-01-28 1969-11-06 Sel Kontakt Bauelemente G M B Spulenkoerper
DE2064826A1 (de) * 1970-02-23 1971-09-16 Ericsson Telefon Ab L M Spulenkörper fur Flachrelais
BE880922A (nl) * 1979-12-28 1980-06-30 Bell Telephone Mfg Spoelvorm
GB2089764A (en) * 1980-11-25 1982-06-30 Legrand Sa Coil former for transformer
JPS5826772A (ja) * 1981-08-04 1983-02-17 Canon Electronics Inc コイルボビン
CH657473A5 (en) * 1982-12-22 1986-08-29 Gfeller Ag Coil former for winding with an electrically insulated conductor
DE3835105C2 (fr) 1988-01-26 1990-09-13 Fuji Electric Co., Ltd., Kawasaki, Kanagawa, Jp

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 104 (M - 212) 6 May 1983 (1983-05-06) *

Also Published As

Publication number Publication date
DE19518349C1 (de) 1996-05-30
DE59600357D1 (de) 1998-08-27
US5781287A (en) 1998-07-14
EP0743659B1 (fr) 1998-07-22
JPH08330168A (ja) 1996-12-13

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