EP1455375A1 - Fusible avec une étanchéité temporaire quasi-hermétique de l'intérieur - Google Patents

Fusible avec une étanchéité temporaire quasi-hermétique de l'intérieur Download PDF

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Publication number
EP1455375A1
EP1455375A1 EP03004735A EP03004735A EP1455375A1 EP 1455375 A1 EP1455375 A1 EP 1455375A1 EP 03004735 A EP03004735 A EP 03004735A EP 03004735 A EP03004735 A EP 03004735A EP 1455375 A1 EP1455375 A1 EP 1455375A1
Authority
EP
European Patent Office
Prior art keywords
tube
interior
fuse
component according
fuse element
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
EP03004735A
Other languages
German (de)
English (en)
Other versions
EP1455375B1 (fr
Inventor
Frank Althoff
Werner Barz
Andreas Baus
André Jöllenbeck
Peter PÖSSNICKER
Uwe RÖDER
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.)
Wickmann Werke GmbH
Original Assignee
Wickmann Werke GmbH
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 Wickmann Werke GmbH filed Critical Wickmann Werke GmbH
Priority to EP03004735A priority Critical patent/EP1455375B1/fr
Priority to DE50312316T priority patent/DE50312316D1/de
Priority to US10/788,215 priority patent/US7138899B2/en
Priority to JP2004057045A priority patent/JP3970854B2/ja
Priority to CNB2004100078943A priority patent/CN100350540C/zh
Publication of EP1455375A1 publication Critical patent/EP1455375A1/fr
Application granted granted Critical
Publication of EP1455375B1 publication Critical patent/EP1455375B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/0411—Miniature fuses
    • H01H85/0415—Miniature fuses cartridge type
    • H01H85/0418—Miniature fuses cartridge type with ferrule type end contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/143—Electrical contacts; Fastening fusible members to such contacts
    • H01H85/157—Ferrule-end contacts

Definitions

  • the invention relates to a fuse component with a fuse element, which is in an interior of a cylindrical tube from an electrical insulator extends between two faces of the tube, wherein two end caps made of an electrically conductive material are applied to the two ends of the tube that an electrical contact is made to the fuse element is.
  • Fuse components of the type mentioned at the beginning have been known for a long time.
  • the cylindrical tube consists of a ceramic material and a circular cylindrical Interior as well as a square outer contour with rounded edges.
  • the fuse element is, for example a wire that is diagonal in the interior extends such that it only the walls of the tube touched at the ends.
  • the wire of the fuse element is at both ends around the face of the tube, the ends of the fuse wire on the outer walls of the tube.
  • metallic end caps are attached to the tube.
  • the End caps can be made of elastic material, for example be and pressed onto the ends of the tube, whereby pressing not only for a tight fit of the end caps, but also for the electrical one Contact with the fuse element.
  • the metal caps can also glued to the ends of the tube or according to the corresponding Preparation of the surface of the outer wall of the Tube to be soldered onto this.
  • Techniques of applying the end caps are known to both for a tight fit of the caps as well as for a good one ensure electrical contact to the fuse element.
  • fusible link components in which the caps applied to the ends of the tube in this way are that the interior is hermetically sealed.
  • these Components can be air with a special interior Gas mixture (e.g. nitrogen) under normal pressure filled or reduced pressure or a vacuum contain.
  • the object of the invention is to provide a fuse element to create the advantage of the surge in pressure in the case of cutting the fuse element with a higher reliability of the component when heated connects during component assembly.
  • this is intended to be temporary quasi-hermetic Sealing of the interior can be called.
  • the effective cross-sectional area and the length of the Pressure equalization channels between the interior and the exterior Environment are dependent on the volume of the interior and the temperature gradients occurring during assembly dimension that a predetermined maximum during assembly Pressure increase in the interior is not exceeded. This results in minimum cross sections and maximum lengths of the pressure equalization channels.
  • the pressure equalization channels be small enough so that the desired volatile Pressure increase in the event of a shutdown is slowly reduced, that he had to extinguish the arc beforehand can.
  • the system consisting of a gas-filled interior and pressure equalization channels through which gas flows, shows equalization processes when an abrupt pressure change occurs in the interior, which can be modeled in electrical analogy as a low-pass behavior.
  • the result is a time constant of an approximation of a low-pass filter of the first order, which can be derived from the exponentially falling pressure in the interior.
  • the fuse element should preferably be dimensioned such that the time constant for a reduction in sudden changes in the differential pressure between the interior and the external environment is in the order of magnitude of 10 -2 and 10 2 seconds. With such a preferred dimensioning, the temperature gradients of, for example, 2 Kelvin per second occurring during SMD assembly processes will only result in acceptably small pressure increases in the interior.
  • the Fusible conductor comprises a wire that from the interior of the Tube around the end faces, so that the both ends of the wire between the outer wall of the tube and the respective inner walls of the end caps include the sealing elements in each end cap each has a platelet-shaped insert inserted into the cap base Sealing element with an the outer cross section of the Tube adapted shape.
  • These sealing elements are pressed from the caps to the front of the tubes, whereby the fuse wire between the pressed plate and the end face is passed so that due to the elastic deformation of the inserted platelet-shaped Sealing element a very low pressure equalization channel between the face of the tube, fuse wire and Sealing element remains.
  • the stronger the sealing element is pressed the smaller the cross section of the pressure equalization channels remaining on both sides of the wire.
  • the sealing elements each include at least one at both ends in the interior of the tube Pressed in plug-like sealing element made of an elastic Material.
  • the plug inserted in the interior Made of elastic material presses a short section of the Fusible conductor wire to the inner walls of the tube in such a way indicates that between the inner wall of the tube, the Wire and the elastic, deformed sealing element two pressure equalization channels with a very small cross-section remain.
  • the cross section of the pressure equalization channels depends the cross section of the wire and the elastic deformation of the sealing element.
  • an elastic plastic plug at each end of the tube pressed.
  • the plastic plugs have mechanical unloaded condition (before pressing) Cross-sectional area equal to or slightly larger than the inside cross-sectional area of the tube.
  • the Pressed-in plastic plugs tightly press the fuse element the inner wall of the tube and engages around the inner wall pressed fuse element so that only a very narrow pressure equalization channel between the fuse element, the inner wall of the tube and the plastic stopper remains.
  • the elastic plastic plug is made for example from a silicone rubber.
  • FIGS. 1A and 1B Embodiment of the fuse component according to the invention shown.
  • the fuse element 1 has a fusible conductor 2, the one in the interior 3 cylindrical tube 4 is arranged such that it passes through the interior 3 approximately diagonally.
  • the diagonal Arrangement of the fuse element 2 in the interior 3 creates defined environmental conditions on the surface of the Fusible conductor, since this the inner walls of the tube 4th not touched.
  • the fuse element 2 is, for example Circular cross-section wire. In alternative embodiments the fuse element can also have a spiral shape wire wrapped around an electrically insulating core exhibit.
  • the fuse element 2 can also consist of several together connected wire sections exist. At the ends of the tube 4 is the fuse element around the end faces led around in such a way that the ends of the fuse element 2 rest on the outer wall of the tube 4.
  • End caps made of an electrically conductive material are applied to the ends of the tube 4.
  • the end caps are made of sheet brass and then tinned.
  • the tube 4 can for example be made of a ceramic material (eg Al 2 O 3 ), a glass material or another electrical insulator.
  • a plastic tube is used, for example a tube made of a polyamide copolymer, which may be glass fiber reinforced.
  • the tube 4 is cylindrical and, in the preferred embodiment, has a circular cylindrical inner wall and a square outer cross section with rounded edges, as shown in FIG. 1B.
  • the fusible conductor wire 2 is guided around the end faces of the tube 4 such that it lies in the axial direction approximately in the middle on one of the four outer surfaces of the tube 4.
  • the end caps 5 have an inner cross section that is slightly larger than the outer cross section of the tube 4. They are plugged onto the ends of the tube 4 with the fusible conductor 2 carried around and deformed from the outside by stamping in such a way that they sit mechanically firmly on the tube 4 and thereby clamp the fusible conductor 2.
  • laser pulse soldering is preferably provided at a point 6 between the fuse element 2 and the wall of the end cap 5.
  • the tube 4 has an inside diameter of about 2.5 mm and outside dimensions of about 4 mm x 4 mm x 9.6 mm.
  • the end caps are approximately 2.8 mm long and have an outer diameter of approximately 4.4 mm.
  • an elastically deformable plastic plug 7 in the Interior 3 pressed at each end of the tube 4 pressed.
  • the outer diameter of the elastic Plastic plug corresponds to the inside diameter of the tube 4 or is slightly larger.
  • the plastic plug has a diameter of 2.5 mm and a length of 2 mm.
  • the plastic plug 7 presses the fuse element 2 over the length of the plastic stopper to the inner wall of tube 4.
  • the plastic stopper 7 is made of a relatively easily deformable made of elastic material, for example from a Silicone rubber.
  • the material of the plastic stopper deforms 7 in the area of the fuse element 2 such that it encompasses the fuse element, with the Contact surface of the fuse element 2 on the inner wall of the Tube 4 small pressure equalization channels 10 and 11 remain along the fuse element 2.
  • the plastic stopper 7 must not be made of one material, which plastically deforms and flows in such a way that it Fusible conductor 2 completely encloses and no pressure equalization channels leaves.
  • the preferred one Embodiment of the fuse component 1 in both end caps 5 a plastic plate 8 between the bottom the end cap 5 and the end faces of the tube 4 inserted.
  • plastic plates 8 are also pressed together and deformed so that they fuse element 2, which rests on the end face of the tube 4, partially embrace.
  • plastic platelets 8 the plastic plugs 7.
  • the plastic plates 8 and the plastic plugs 7 can be made from the same, for example Material.
  • Figure 2 shows a cross-sectional view of part of a alternative embodiment of the fuse component according to the invention 1'.
  • a fuse element 2 ' guided diagonally through the interior 3 'of a tube 4', the ends of the fuse element 2 'around the end faces of the Tubes 4 'are guided around and on the outer walls of the tube 4 '.
  • End caps 5 ' are on the ends of the tube 4 'placed.
  • a cap embossing ensures a firm fit and mechanical holding of the fuse element 2 '.
  • laser pulse soldering 6 ' for Provided better electrical contact his.
  • platelets 9 made of a deformable, porous material inserted and close to the bottoms of the end caps and pressed the front sides.
  • the end caps face at the end of an opening 12 in which a section of the Platelet 9 is exposed. Because of the porous structure of the plate 9 are formed with a suitable choice of material small pressure equalization channels 13 within the plate 9 between the opening 12 and the interior 3 '.

Landscapes

  • Fuses (AREA)
EP03004735A 2003-03-04 2003-03-04 Fusible avec une étanchéité temporaire quasi-hermétique de l'intérieur Expired - Lifetime EP1455375B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP03004735A EP1455375B1 (fr) 2003-03-04 2003-03-04 Fusible avec une étanchéité temporaire quasi-hermétique de l'intérieur
DE50312316T DE50312316D1 (de) 2003-03-04 2003-03-04 Schmelzsicherungsbauelement mit einer temporär quasi-hermetischen Abdichtung des Innenraums
US10/788,215 US7138899B2 (en) 2003-03-04 2004-02-26 Fuse element with a temporary quasi-hermetic seal of its interior
JP2004057045A JP3970854B2 (ja) 2003-03-04 2004-03-02 内部の一時的準気密シールを備えるヒューズエレメント
CNB2004100078943A CN100350540C (zh) 2003-03-04 2004-03-03 具有内腔临时准密封的熔断保险元件

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03004735A EP1455375B1 (fr) 2003-03-04 2003-03-04 Fusible avec une étanchéité temporaire quasi-hermétique de l'intérieur

Publications (2)

Publication Number Publication Date
EP1455375A1 true EP1455375A1 (fr) 2004-09-08
EP1455375B1 EP1455375B1 (fr) 2010-01-06

Family

ID=32798761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03004735A Expired - Lifetime EP1455375B1 (fr) 2003-03-04 2003-03-04 Fusible avec une étanchéité temporaire quasi-hermétique de l'intérieur

Country Status (5)

Country Link
US (1) US7138899B2 (fr)
EP (1) EP1455375B1 (fr)
JP (1) JP3970854B2 (fr)
CN (1) CN100350540C (fr)
DE (1) DE50312316D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019122611A1 (de) * 2019-08-22 2021-02-25 Endress+Hauser SE+Co. KG SMD-lötbares Bauelement und Verfahren zum Herstellen eines SMD-lötbaren Bauelements

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Publication number Priority date Publication date Assignee Title
US7436283B2 (en) * 2003-11-20 2008-10-14 Cooper Technologies Company Mechanical reinforcement structure for fuses
DE102005033212B4 (de) * 2005-06-07 2007-04-19 Siba Fuses Gmbh & Co. Kg Hochspannungssicherung
WO2007119358A1 (fr) * 2006-03-16 2007-10-25 Matsushita Electric Industrial Co., Ltd. Fusible monte en surface
CN101308744B (zh) * 2007-05-18 2010-05-19 爱迪生电气研发（上海）有限公司 熔断器及其装配方法
US8154376B2 (en) * 2007-09-17 2012-04-10 Littelfuse, Inc. Fuses with slotted fuse bodies
US9190235B2 (en) * 2007-12-29 2015-11-17 Cooper Technologies Company Manufacturability of SMD and through-hole fuses using laser process
US9224564B2 (en) * 2010-06-04 2015-12-29 Littelfuse, Inc. Fuse with counter-bore body
CN102891052A (zh) * 2011-07-19 2013-01-23 天津市双赢电子有限公司 保险管
EP2771899B1 (fr) * 2011-10-27 2017-01-11 Littelfuse, Inc. Fusible doté de bouchons isolés
US9202656B2 (en) * 2011-10-27 2015-12-01 Littelfuse, Inc. Fuse with cavity block
US9558905B2 (en) 2011-10-27 2017-01-31 Littelfuse, Inc. Fuse with insulated plugs
CN103730298A (zh) * 2012-10-13 2014-04-16 温州市方为熔断器有限公司 一种熔体表面带有防氧化涂层的熔断器
US9460882B2 (en) * 2013-03-14 2016-10-04 Littelfuse, Inc. Laminated electrical fuse
CN103337430B (zh) * 2013-06-17 2015-10-21 东莞市博钺电子有限公司 端头无焊锡的表面贴装型熔断器及其制作方法
CN104576252A (zh) * 2013-10-16 2015-04-29 斯玛特电子公司 表面贴着式保险丝及具有表面贴着式保险丝的结构
CN103903929B (zh) * 2014-04-01 2016-08-31 南京萨特科技发展有限公司 一种芯片型保护元件及其批量制造方法
KR20160130214A (ko) * 2015-02-14 2016-11-10 난징 사트 사이언스 앤드 테크놀로지 디벨롭먼트 컴퍼니.,리미티드 보호 소자
DE202015101840U1 (de) * 2015-04-15 2015-04-30 Inter Control Hermann Köhler Elektrik GmbH & Co. KG Schmelzsicherungsbauelement
JP6479707B2 (ja) * 2016-04-27 2019-03-06 太陽誘電株式会社 電子部品用ヒューズ、並びに、ヒューズ付き電子部品モジュール
US10325744B2 (en) * 2016-06-01 2019-06-18 Littelfuse, Inc. Hollow fuse body with notched ends
US10276338B2 (en) 2016-06-01 2019-04-30 Littelfuse, Inc. Hollow fuse body with trench
FR3097636B1 (fr) * 2019-06-20 2021-07-02 Christian Hug Détecteur autonome et irréversible de variation de pression
US11721511B2 (en) * 2022-01-06 2023-08-08 Littelfuse, Inc. Fuse terminal design

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US1700080A (en) * 1921-06-15 1929-01-22 Westinghouse Electric & Mfg Co Fuse
US2135166A (en) * 1937-03-29 1938-11-01 Henry T Bussmann Enclosed fuse
US2166174A (en) * 1934-04-26 1939-07-18 Pierce Renewable Fuses Inc Fuse
US4158187A (en) * 1977-08-05 1979-06-12 Gould Inc. Means for affixing ferrules to a fuse casing
US4656453A (en) * 1982-12-09 1987-04-07 Littelfuse, Inc. Cartridge fuse with two arc-quenching end plugs

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US5198792A (en) * 1992-06-12 1993-03-30 Cooper Industries, Inc. Electrical fuses and method of manufacture
US5235307A (en) * 1992-08-10 1993-08-10 Littelfuse, Inc. Solderless cartridge fuse
CN2138838Y (zh) * 1992-11-19 1993-07-21 丁天宝 快速熔断器

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
US1700080A (en) * 1921-06-15 1929-01-22 Westinghouse Electric & Mfg Co Fuse
US2166174A (en) * 1934-04-26 1939-07-18 Pierce Renewable Fuses Inc Fuse
US2135166A (en) * 1937-03-29 1938-11-01 Henry T Bussmann Enclosed fuse
US4158187A (en) * 1977-08-05 1979-06-12 Gould Inc. Means for affixing ferrules to a fuse casing
US4656453A (en) * 1982-12-09 1987-04-07 Littelfuse, Inc. Cartridge fuse with two arc-quenching end plugs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019122611A1 (de) * 2019-08-22 2021-02-25 Endress+Hauser SE+Co. KG SMD-lötbares Bauelement und Verfahren zum Herstellen eines SMD-lötbaren Bauelements
US11901149B2 (en) 2019-08-22 2024-02-13 Endress+Hauser SE+Co. KG Component that can be soldered in SMD technology and method for producing a component that can be soldered in SMD technology

Also Published As

Publication number Publication date
EP1455375B1 (fr) 2010-01-06
CN100350540C (zh) 2007-11-21
JP3970854B2 (ja) 2007-09-05
DE50312316D1 (de) 2010-02-25
CN1530994A (zh) 2004-09-22
US7138899B2 (en) 2006-11-21
US20040183646A1 (en) 2004-09-23
JP2004342590A (ja) 2004-12-02

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