US3750073A - Coil bobbin - Google Patents

Coil bobbin Download PDF

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Publication number
US3750073A
US3750073A US00257169A US3750073DA US3750073A US 3750073 A US3750073 A US 3750073A US 00257169 A US00257169 A US 00257169A US 3750073D A US3750073D A US 3750073DA US 3750073 A US3750073 A US 3750073A
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US
United States
Prior art keywords
coil bobbin
members
insulating frame
coil
iron core
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
US00257169A
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English (en)
Inventor
K Okano
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.)
Tamura Corp
Original Assignee
Tamura Corp
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 Tamura Corp filed Critical Tamura Corp
Application granted granted Critical
Publication of US3750073A publication Critical patent/US3750073A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins
    • 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
    • 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
    • H01F2005/022—Coils wound on non-magnetic supports, e.g. formers wound on formers with several winding chambers separated by flanges, e.g. for high voltage applications

Definitions

  • Said coil bobbin comprises a pair of coil bobbin members identical in shape and each comprising a box-shaped body formed with flanges at opposite ends of the body to define a coil chamber therebetween on the outer periphery of the body, and an insulating frame adapted to mount said pair of coil bobbin members on opposite sides thereof.
  • the insulating frames for the iron core should .be formed separately from coil bobbins, since the coil bobbins are in fixed form and the shape of the iron core is'determined magnetically.
  • anobject of this invention is to provide a coil bobbin; low in cost andreliable in performance, which. is constructed such that sufficiently great creeping distances are providedbetween the coil chambers and betweenthe coil chambers and the iron core respectively so that the transformer can withstand a high voltage when the coil bobbin according to this invention is used, and whichpermits to save labor in assembling .the'parts to produce a transformer and increase the productivity thereof.
  • Another objectof the invention is to provide a coil bobbin composed of a plurality ofcoil bobbin members having an insulating frame adapted-to beinserted between the coil bobbin members so as to increasethe creeping distance between the coil chambers-
  • Another object of the invention is to provide a coil bobbin of high mechanical strength in whichthe insulating frameis formed on opposite surfaces of the base thereof with coil bobbin chambers for receiving therein the respectivecoil bobbin members, so that the coil chambers are spaced apart from-each other a suffi ciently great creeping distance to enable the transformer using the coil bobbin according tothisinvention to withstand a high voltage.
  • Still another object of the invention is toprovide a coil bobbin in which the insulating frame is formed on one surface of the base thereof with side walls disposed at three sides of the base, portionsof the side walls disposed at opposite sides of the base each-being'provided' with an auxiliary wall memb'er'projecting horizontally inwardly from the top of each side wall'portion so as to define one coil bobbin'chamberby the sidewalls, so that. the creepingdistance between the coil in one coil chamber and the iron corecan be increased and assembling of the parts can be facilitated.
  • Still another object of the invention is to provide a coil-bobbin in which an insulating frame for the iron core is disposed on the auxiliary wall members provided on the side walls defining one coil bobbin chamber and theiron core is inserted into the coil bobbin through the insulating frame for the iron core, so that the creeping distance between the coil in one coil chamber and the iron core can be increased and the transformer incorporating the-coilbobbin according to thisinvention can withstand a high voltage.
  • a further object of the invention is to provide a coil bobbin ofhighmechanical strength in which the plural-' 'ityof coil bobbin-members are each formed with a projection disposed substantially in the middle of one portionof the flange formed atone end of the body of the coil bobbin member, and the base of the insulating frame constituting the base for the two coil bobbin chambers is formed with openings in positions corresponding to theprojections formed in the two coil bobbin members, so that the coil bobbin members canbe accurately positioned inthe respective coil bobbin chambers.
  • a further object of the'inventio'n is'to provide a coil bobbin inwhich the' provision of the flangesin the coil bobbin mernbersimpa'rts high mechanical strength to the coil bobbin and increases the creeping distance between the coils and the iron core sufficiently to enable the transformerincorporating .the coil bobbin according' to this invention to withstand a high voltage.
  • FIG. 1 is an exploded perspective view of a transformer comprisingan iron core composed of a lami-' natedironcore member of-the E type and a laminated iron core member-of the I type and incorporating the coil bobbin according to this invention;
  • FIG'. 2 is a vertical sectionalview of the coil bobbin according to this invention.
  • FIG. 3 is a vertical sectional view of the transformer of FIG. 1;
  • FIG. 4 is a perspective view of another form of the insulating frame'for theiron corefand I
  • FIG. 5 is a perspective view of still another form of the insulating frame for the iron core.
  • the coil bobbinshown is composed'of apair of coil bobbin members 1, 2 identical'in shape which are made of'a synthetic resinous material or other insulating material.
  • Coil bobbinmembers l, 2 each has a box-shaped body-3 formed with flanges 4, -5 on opposite ends thereof respectively to de fine a coil chamber 6 therebetween on the outer periphery'of body 3 which'has a central axial space 7 therein for the iron'coreto extend therethrough.
  • One flange 4 of coil bobbin members 1, 2 is formed with a projection 8 disposed substantially-in the middle of one portion of the flange while the other flange 5 is formed with lead wire engagingportionsw in a pair of opposite portionsthereof.
  • l designates an insulating frame formed integrally from a synthetic resinous material or other insulating material and comprising a base 11 on which is formed a coil bobbin chamber 12 divided into a primary coil bobbin chamber 13 and a secondary coil bobbin chamber 14 disposed on the upper surface and the lower surface of base 11 respectively.
  • the primary coil bobbin chamber 13 is shaped identically in a plan view with the flanges 4 of coil bobbin members 1, 2.
  • the base 11 of insulating frame 10 is formed with an axial space 15 in the central portion for the iron core to extend therethrough.
  • An opening 16 is formed at one of the four sides of base 11 which has no side wall so as to permit coil bobbin member 1 to be inserted therethrough into chamber 13.
  • the lower voltage coil bobbin chamber 14 is defined by side walls 20 formed integrally with the base 11 of insulating frame 10 and disposed at three sides on the lower surface of the base.
  • An opening 19 is formed at one of the four sides of base 11 which has no side wall to permit coil bobbin member 2 to be insertedthere through into chamber 14.
  • the openingl6 for chamber 13 formed on the upper surface of base 11 is disposed at a side opposite to the side at which the opening 19 for chamber 14 is formed on the lower surface thereof.
  • the secondary coil bobbin chamber 14 is shaped'identically in a plan view with the flanges 4 of coil bobbin members 1, 2.
  • the base plate 11 of insulating frame 10 is formed with an opening 21 in each of opposite marginal portions thereof for receiving therein one of the projections 8 formed on the opposite portions of the flanges 4 of coil bobbin members 1, 2.
  • Insulating frame 22 is an insulating frame for the iron core formed integrally and made of the same material as insulating frame 10.
  • Insulating frame 22 for the iron core comprises a box-shaped body 24 formed therein with an axialspace 23 for inserting the iron core therethrough and including a flange 25 provided at one end of body 24.
  • Flange 25, which is slightly smaller than but substantially of identical shape as the flanges 4 of coil bobbin members 2, is formed integrally with side walls 26 disposed at opposite portions of the flange 25.
  • 27 is an iron core composed of silicon steel plates arranged in laminated form and comprising a laminated iron core member 28 of the E type and a laminated iron core member 29 of the I type.
  • the coil bobbin according to this invention is constructed as aforementioned.
  • a primary coil 30 is wound on the outer periphery of the body 3 in the coil chamber 6 of coil bobbin member l, which is inserted in the primary coil bobbin chamber 13 in insulating frame 10.
  • a secondary coil 31 is wound on the outer periphery of the body 3 in the coil chamber 6 of coil bobbin member 2, which is inserted in the secondary coil bobbin chamber 14 in insulating frame 10.
  • the projections 8 formed in the flanges 4 of coil bobbin members 1, 2 are received in the open ings 21 formed in the base 11 of insulating frame 10 so that the two coil bobbin members 1, 2 may be firmly held in position in the respective coil bobbin chambers.
  • the body 24 of insulating frame 22 for the iron core is inserted from above in the central axial space 7 in the coil bobbin member 1 disposed in primary coil bobbin chamber 13, so that the underside of the flange 25 of frame 22 is maintained in contact with the upper surfaces of auxiliary wall members 17 of insulating frame 10.
  • the creeping distance between a primary coil 30 and a secondary coil 31 is sufficiently large, due to the presence of insulating frame 10 and the flanges 4 of coil bobbin members l, 2, to enable the transformer to. withstand a high voltage, and the creeping distance between primary coil 30 and iron cores 27 is sufficiently large, due to the presence of the auxiliary wall members .17 of insulating frame 10 and the insulating frame 22 for the iron core, to enable the transformer to withstand a high voltage.
  • FIG. 4 and FIG. 5 show modified forms of insulating frame 22 for the iron core.
  • the insulating frame shown in FIG. 4 is formed with two ledges 25 each extending horizontally'outwardly from one of two opposite sides of the axial space 23 in box-shaped body 24 and having the same width as body 24, and two side walls 26 integral with body 24 and'each extending vertically from one of two oppositesides of axial space 23 at which there are no ledges 25 for guiding iron core 27 in its movement through rectangular space 23.
  • the insulating frame 22 shown in FIG. 5 is similar to the insulating frame 22 shown in FIG. 4 except that the former lacks the side walls 26 of the latter.
  • the use of the two forms of insulating frame 22 shown in FIG. 4 and FIG. 5 also increases the creeping distance between. the primary coil and the iron core, although the absence of the side walls 26 reduces the creeping distance that much. I
  • the coil bobbin according to this invention is constructed such that it is possible to increase the creeping distance between the coils and the creeping distance between the coil and the iron core to enable the transfonner to withstanda high voltage.
  • the coil bobbin has high mechanical strength and canbe produced readily because it'can be produced by molding on a mass production basis.
  • a coil bobbin comprising a pair of coil bobbin members identical in shape and an insulating frame re ceiving said coil bobbin members, each of said coil bobbin member having a body formed with a central axial space for receiving therein an iron core and formed with flanges at opposite ends of the body to de-- fine a coil chamber therebetween on the outer periphery of the body, said insulating frame having a base formed with a central axial space for receiving therein said iron core and formed on opposite surfaces thereof with side walls extending vertically to define two coil bobbin chambers each disposed on one of the two surfaces of the base, each of said'two coil bobbin chambers being formed at one 'side thereof with an opening for inserting one of the coil bobbin members therethrough into the respective coil bobbin chamber.
  • a coil bobbin as claimed in claim 1 wherein one of said two coil bobbin chambers is for secondary coil bobbin and the other is for primary coil bobbin which is required to withstand a higher voltage than the secondary coil bobbin, and one of said openings for said two coil bobbin chambers for inserting the coil bobbin members'therethrough is disposed at a side opposite the side at which the other opening is disposed.
  • a coil bobbin as claimed in claim 3 further comprising an insulating frame for the iron core having a box-shaped body formed with a central axial space for receiving therein the iron core and received in said central axial spaces of the pair of coil bobbin members and said insulating frame for the coil bobbin members, said body being formed at an upper end thereof with a flange so as to contact with the upper surface of the flange of said one of the coil bobbin members.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)
US00257169A 1971-07-29 1972-05-26 Coil bobbin Expired - Lifetime US3750073A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971067391U JPS5134499Y2 (it) 1971-07-29 1971-07-29

Publications (1)

Publication Number Publication Date
US3750073A true US3750073A (en) 1973-07-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00257169A Expired - Lifetime US3750073A (en) 1971-07-29 1972-05-26 Coil bobbin

Country Status (6)

Country Link
US (1) US3750073A (it)
JP (1) JPS5134499Y2 (it)
DE (1) DE2233571C3 (it)
FR (1) FR2147032B1 (it)
GB (1) GB1392495A (it)
NL (1) NL153362B (it)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839690A (en) * 1972-11-29 1974-10-01 Siemens Ag Insulating means for an electromagnetic relay
US3909761A (en) * 1973-05-23 1975-09-30 Miles Platts Ltd Transformers
US3939450A (en) * 1974-10-04 1976-02-17 Emerson Electric Co. Electrical coil assembly with means for securing external leads
US4000483A (en) * 1976-06-24 1976-12-28 The Singer Company Low voltage power transformer
US4702555A (en) * 1984-05-14 1987-10-27 Hitachi, Ltd. Optical system drive for optical recording/reproducing apparatus
US5081335A (en) * 1989-10-17 1992-01-14 Bambozzi S/A. -Maquinas Hidraulicas E Eletricas Miniature welding apparatus
US5446435A (en) * 1991-09-20 1995-08-29 Liaisons Electroniques-Mecaniques Lem S.A. Current sensor comprising a magnetic circuit with an air gap
US6750749B2 (en) * 1998-07-31 2004-06-15 Hitachi, Ltd. Amorphous metal core transformer
US20060197643A1 (en) * 2005-03-01 2006-09-07 Darfon Electronics Corp. Bobbin module of transformer
US20090201114A1 (en) * 2008-02-07 2009-08-13 Tyco Electronics Corporation Bobbin assembly
US20100245009A1 (en) * 2007-12-06 2010-09-30 Hideyuki Akiyama Transformer
US20120223799A1 (en) * 2011-03-02 2012-09-06 Power Integrations, Inc. Transverse shroud and bobbin assembly
US20120326831A1 (en) * 2011-06-21 2012-12-27 Minebea Co., Ltd. Coil component
US20140077916A1 (en) * 2012-09-14 2014-03-20 Lsis Co., Ltd. Transformer
US20140266535A1 (en) * 2013-03-14 2014-09-18 Hiq Solar, Inc. Low loss inductor with offset gap and windings
US20160118185A1 (en) * 2013-05-10 2016-04-28 Tokai Kogyo Co., Ltd. Reactor and manufacturing method of reactor
CN107017084A (zh) * 2016-01-22 2017-08-04 Tdk株式会社 线圈装置
CN109285661A (zh) * 2017-07-21 2019-01-29 Tdk株式会社 线圈装置
US11217385B2 (en) * 2016-09-13 2022-01-04 Hitachi, Ltd. Transformer and electric power converter

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2077048B (en) * 1980-05-30 1983-06-02 Philips Electronic Associated Wound electrical components
EP0053644A1 (fr) * 1980-12-10 1982-06-16 S.A Clarel Procédé de fabrication d'un enroulement autour d'un noyau de self ou de transformateur et têtes de bobines adaptées à ce procédé
FR2502836B1 (fr) * 1981-03-30 1985-07-26 Chappel Bernard Dispositif pour la realisation de bobinages electriques isoles, et procede d'assemblage de ce dispositif
NL8304414A (nl) * 1983-12-22 1985-07-16 Nedap Nv Veiligheidstransformator.
FR2756967B1 (fr) * 1996-12-09 1999-01-08 Thomson Television Components Transformateur pour alimentation a haute frequence de decoupage
CN103117158B (zh) * 2013-02-26 2015-07-15 上海鹰峰电子科技有限公司 一种立绕线圈结构电抗器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2066396A (en) * 1932-06-10 1937-01-05 Koch & Sterzel Ag Current transformer
US2355477A (en) * 1942-10-15 1944-08-08 William F Stahl Form for windings and the like
US3605055A (en) * 1970-07-02 1971-09-14 Gen Electric Two-piece winding bobbin for watt-hour meter potential coil
US3609859A (en) * 1969-06-20 1971-10-05 Westinghouse Electric Corp Method of making an electric transformer
US3644156A (en) * 1969-09-15 1972-02-22 Westinghouse Electric Corp Method of making a coil bobbin
US3652968A (en) * 1971-01-26 1972-03-28 Westinghouse Electric Corp Telescoped electrical windings and method of making same
US3661342A (en) * 1970-08-19 1972-05-09 Jackson Controls Co Inc Operative winding separator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1208577A (en) * 1916-03-27 1916-12-12 Pan American Electric Tool Company Solenoid.
DE1908275U (de) * 1964-11-14 1965-01-14 Graupner Doerks & Co Spulenkoerper fuer transformatoren od. dgl.
DE1932174A1 (de) * 1969-06-25 1971-01-14 Adolf Faerber UEbertragungsvorrichtung mit Kriechstreckenverlaengerung zwischen den aktiven Teilen untereinander und den aktiven und passiven Teilen
DE1936125A1 (de) * 1969-07-16 1971-01-28 May & Christe Gmbh Wicklungsaufbau fuer Kleintransformatoren und Drosselspulen
DE7103490U (de) * 1971-01-30 1971-05-13 Weiner N Spulenkoerper
DE7105903U (de) * 1971-02-17 1971-06-03 Schutzapparate Ges Paris + Co Mbh Kg Trenntransformator fuer rasiersteckdosen und dg.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2066396A (en) * 1932-06-10 1937-01-05 Koch & Sterzel Ag Current transformer
US2355477A (en) * 1942-10-15 1944-08-08 William F Stahl Form for windings and the like
US3609859A (en) * 1969-06-20 1971-10-05 Westinghouse Electric Corp Method of making an electric transformer
US3644156A (en) * 1969-09-15 1972-02-22 Westinghouse Electric Corp Method of making a coil bobbin
US3605055A (en) * 1970-07-02 1971-09-14 Gen Electric Two-piece winding bobbin for watt-hour meter potential coil
US3661342A (en) * 1970-08-19 1972-05-09 Jackson Controls Co Inc Operative winding separator
US3652968A (en) * 1971-01-26 1972-03-28 Westinghouse Electric Corp Telescoped electrical windings and method of making same

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839690A (en) * 1972-11-29 1974-10-01 Siemens Ag Insulating means for an electromagnetic relay
US3909761A (en) * 1973-05-23 1975-09-30 Miles Platts Ltd Transformers
US3939450A (en) * 1974-10-04 1976-02-17 Emerson Electric Co. Electrical coil assembly with means for securing external leads
US4000483A (en) * 1976-06-24 1976-12-28 The Singer Company Low voltage power transformer
US4702555A (en) * 1984-05-14 1987-10-27 Hitachi, Ltd. Optical system drive for optical recording/reproducing apparatus
US5081335A (en) * 1989-10-17 1992-01-14 Bambozzi S/A. -Maquinas Hidraulicas E Eletricas Miniature welding apparatus
US5446435A (en) * 1991-09-20 1995-08-29 Liaisons Electroniques-Mecaniques Lem S.A. Current sensor comprising a magnetic circuit with an air gap
US6750749B2 (en) * 1998-07-31 2004-06-15 Hitachi, Ltd. Amorphous metal core transformer
US7034648B2 (en) 1998-07-31 2006-04-25 Hitachi, Ltd. Amorphous metal core transformer
US20060197643A1 (en) * 2005-03-01 2006-09-07 Darfon Electronics Corp. Bobbin module of transformer
US7154366B2 (en) * 2005-03-01 2006-12-26 Darfon Electronics Corp. Bobbin module of transformer
US20100245009A1 (en) * 2007-12-06 2010-09-30 Hideyuki Akiyama Transformer
US8284009B2 (en) * 2007-12-06 2012-10-09 Fdk Corporation Transformer
US20090201114A1 (en) * 2008-02-07 2009-08-13 Tyco Electronics Corporation Bobbin assembly
US7859380B2 (en) * 2008-02-07 2010-12-28 Tyco Electronics Corporation Bobbin assembly
US20120223799A1 (en) * 2011-03-02 2012-09-06 Power Integrations, Inc. Transverse shroud and bobbin assembly
US8766756B2 (en) * 2011-03-02 2014-07-01 Power Integrations, Inc. Transverse shroud and bobbin assembly
CN102682971A (zh) * 2011-03-02 2012-09-19 电力集成公司 用于绕线管的护罩、横向护罩及绕线管组件
US8933772B2 (en) * 2011-06-21 2015-01-13 Minebea Co., Ltd. Coil component
US20120326831A1 (en) * 2011-06-21 2012-12-27 Minebea Co., Ltd. Coil component
US20140077916A1 (en) * 2012-09-14 2014-03-20 Lsis Co., Ltd. Transformer
US8922320B2 (en) * 2012-09-14 2014-12-30 Lsis Co., Ltd. Transformer
US20140266535A1 (en) * 2013-03-14 2014-09-18 Hiq Solar, Inc. Low loss inductor with offset gap and windings
US20160118185A1 (en) * 2013-05-10 2016-04-28 Tokai Kogyo Co., Ltd. Reactor and manufacturing method of reactor
US9984813B2 (en) * 2013-05-10 2018-05-29 Toyota Jidosha Kabushiki Kaisha Reactor and manufacturing method of reactor
CN107017084A (zh) * 2016-01-22 2017-08-04 Tdk株式会社 线圈装置
CN107017084B (zh) * 2016-01-22 2020-03-27 Tdk株式会社 线圈装置
US11217385B2 (en) * 2016-09-13 2022-01-04 Hitachi, Ltd. Transformer and electric power converter
CN109285661A (zh) * 2017-07-21 2019-01-29 Tdk株式会社 线圈装置
CN109285661B (zh) * 2017-07-21 2020-07-28 Tdk株式会社 线圈装置

Also Published As

Publication number Publication date
NL7210097A (it) 1973-01-31
NL153362B (nl) 1977-05-16
JPS5134499Y2 (it) 1976-08-26
DE2233571B2 (de) 1976-07-15
DE2233571C3 (de) 1982-12-30
GB1392495A (en) 1975-04-30
FR2147032B1 (it) 1976-09-17
FR2147032A1 (it) 1973-03-09
JPS4825211U (it) 1973-03-26
DE2233571A1 (de) 1973-02-15

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