EP0154801A2 - Coupe-circuit miniature et méthode de sa fabrication - Google Patents

Coupe-circuit miniature et méthode de sa fabrication Download PDF

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Publication number
EP0154801A2
EP0154801A2 EP85101136A EP85101136A EP0154801A2 EP 0154801 A2 EP0154801 A2 EP 0154801A2 EP 85101136 A EP85101136 A EP 85101136A EP 85101136 A EP85101136 A EP 85101136A EP 0154801 A2 EP0154801 A2 EP 0154801A2
Authority
EP
European Patent Office
Prior art keywords
receptacle
conductors
conductor
fuse
base
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
EP85101136A
Other languages
German (de)
English (en)
Other versions
EP0154801B1 (fr
EP0154801A3 (en
Inventor
Werner Marx
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 AT85101136T priority Critical patent/ATE42866T1/de
Publication of EP0154801A2 publication Critical patent/EP0154801A2/fr
Publication of EP0154801A3 publication Critical patent/EP0154801A3/de
Application granted granted Critical
Publication of EP0154801B1 publication Critical patent/EP0154801B1/fr
Expired 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
    • H01H85/0417—Miniature fuses cartridge type with parallel side contacts

Definitions

  • the invention relates to a miniature fuse, consisting of a plastic base, a plastic cap and two conductors passing through the base, which are bridged within the cap by a fusible conductor soldered to the conductors, and a manufacturing method for this miniature fuse.
  • the invention is suitable for all fuses in which a fusible conductor is to be fastened to it in a transverse position, and for other electrical components on which another conductor is to be securely fastened to a conductor transversely to the latter. Since the invention is to be used preferably for miniature fuses of the above type, the invention is explained in the following only with reference to miniature fuses.
  • the fuse element is softly soldered in the area of the ends of the pin-shaped conductors above the base. Especially when using fusible conductors made of very thin wire, soldering is carried out by hand in order to establish a reliable connection between the conductors and the fusible conductor.
  • the heat transferred can influence the soldering point between the connecting pin and the fuse element in such a way that in the worst case the soldered connection opens.
  • the object of the invention is therefore to create a secure attachment of the fuse element to the conductors.
  • the extremely small dimensions of the fuse element and the conductor are to be taken into account as well as the fact that fuses of the type concerned here are a typical mass-produced article, with which even a small additional effort drastically increases the manufacturing costs overall can cause.
  • the invention provides that a receptacle for the fusible conductor is formed on each conductor above the base and the connection between the receptacle and the fusible conductor is strengthened by melting soft solder.
  • the fuse element receives an additional fastening by means of a receptacle through which the fuse element is grasped.
  • a mechanical or positive connection is thus established between the fuse element and each of the two conductors of the miniature fuse before soft solder is additionally applied to the connection point. It is sufficient if the fuse element is initially only held in or on the receptacle and is finally secured by the soft soldering.
  • the possibilities for training the receptacle to perform this holding function are correspondingly diverse.
  • the receptacle is preferably formed by rolling or bending the upper end of the conductor.
  • the fuse element can either be retracted or hooked in, depending on whether the receptacle completely or only partially encompasses the fuse element, or the fuse element is placed on the conductor before curling or bending, so that after the receptacle has been formed, the fuse element is already in it.
  • the upper end of the conductor is expediently shaped flat, namely flattened, and recesses or notches are preferably provided in the region of the receptacle.
  • the conductors which are usually round in cross section, are shaped flat for fastening the fuse element, so that the receptacle encloses the fuse element with a flat section.
  • the notches are very important for the quality of the soldering because the solder not only adheres to the fuse element on both sides of the receptacle, but also reaches the fuse element through the notch and creates additional bridges between the fuse element and the receptacle or the conductor.
  • solder adheres to the jagged surface of the receptacle much better than if the receptacle had a smooth surface.
  • this form of the receptacle also has a certain capillary action when the liquid soft solder is applied, which contributes to a further improvement in the strength of the soldered connection.
  • a particularly economical method for producing the miniature fuse according to the invention consists in the fact that several bases with inserted conductors, at the upper ends of which the receptacle is prepared, are arranged in a row aligned side by side, a continuous fusible conductor thread in a stretched position and a predetermined height across the upper ends of the conductors are placed against them, the receptacle is formed by rolling or bending the upper ends of the conductors to enclose and hold the fusible conductor thread, the soft solder is applied to the receptacle and the fusible conductor in this area and the connecting pieces between the fused conductors formed be separated. Then the fastening area is reground, cleaned and cleaned if necessary, whereupon the cap is placed on the base and fastened.
  • the fusible conductor thread which runs simultaneously over the entire row of conductors, is embraced and held in one step in the manufacture of the receptacle by rolling or bending the upper ends of the conductor, so that the solder can be melted in the further step, after which the so-called separation formed fuse element from the common thread, whereupon the remaining work can be carried out.
  • An existing plastic, cross-sectionally circular base 1 is provided on its circumference with ribs 2 for fastening a plastic cap, not shown, and with two pin-shaped conductors 3 which pass through and are anchored in this base and whose contact pins are used, for example, to connect to printed circuit boards below the Protrude base 1.
  • the conductors 3 are shaped flat and, as shown, have elongate cutouts 4. These flattened sections of the conductors 3 are rolled in, including a dash-dotted fusible conductor 6 to form a receptacle 5 comprising the fusible conductor 6, as illustrated in FIG. 2, and after prior tilting at position 7.
  • the solder is then applied 8, then the separation of protruding fusible conductor parts, so that finally the final state according to FIG. 3 results.
  • a device 10 which is in the form of a strip, aligned in a row next to one another. If the flattening of the conductor 6 has already taken place before the insertion of the same into the base 1, the processing in the device 10 begins with the application of a fusible conductor thread 9 in an extended position to all conductors 3. Now the conductor 3 which is attached to the Point 7 are tilted so that the fusible conductor 6 is then, as shown in Fig. 2, gripped or encompassed by the receptacle 5 formed.
  • the fusible conductors 6 are separated, namely cut off from the common thread, and at the connection points may be necessary agile remaining work performed, whereupon the cap, not shown, is placed on the base 1 and firmly connected to this.
  • the same size of the eyelet receptacle 5 can be used for fusible conductors of different diameters. This is because the gap between the fuse element 6 and the receptacle 5 fills the solder 8 in each case, of which as much flows into the receptacle 5 as is needed to fill the gap.
  • the solder 8 is drawn into the eyelet-shaped receptacle 5.
  • the receptacle 5 forms a natural protection of the soldered connection against any kind of impairment of the fastening, also against direct mechanical action, especially in the further course of production.

Landscapes

  • Fuses (AREA)
  • Table Devices Or Equipment (AREA)
EP85101136A 1984-03-10 1985-02-04 Coupe-circuit miniature et méthode de sa fabrication Expired EP0154801B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85101136T ATE42866T1 (de) 1984-03-10 1985-02-04 Kleinstsicherung und herstellungsverfahren hierfuer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843408854 DE3408854A1 (de) 1984-03-10 1984-03-10 Kleinstsicherung und herstellungsverfahren hierfuer
DE3408854 1984-03-10

Publications (3)

Publication Number Publication Date
EP0154801A2 true EP0154801A2 (fr) 1985-09-18
EP0154801A3 EP0154801A3 (en) 1986-04-02
EP0154801B1 EP0154801B1 (fr) 1989-05-03

Family

ID=6230133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85101136A Expired EP0154801B1 (fr) 1984-03-10 1985-02-04 Coupe-circuit miniature et méthode de sa fabrication

Country Status (5)

Country Link
US (1) US4628293A (fr)
EP (1) EP0154801B1 (fr)
JP (1) JPS60258824A (fr)
AT (1) ATE42866T1 (fr)
DE (2) DE3408854A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2204457A (en) * 1987-05-05 1988-11-09 Dubilier Plc Sub-miniature fuse
EP0484703A3 (en) * 1990-11-05 1993-03-24 Wickmann-Werke Gmbh Electrical fuse

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0720828Y2 (ja) * 1989-06-14 1995-05-15 エス・オー・シー株式会社 超小型電流ヒューズ
US5287079A (en) * 1992-11-09 1994-02-15 Cooper Industries, Inc. Sub-miniature plastic fuse
DE19803605B4 (de) * 1998-01-30 2004-08-26 Wickmann-Werke Gmbh Verfahren zur Herstellung elektrischer Sicherungen
US6462472B1 (en) * 2000-04-12 2002-10-08 Chen Hsien Huang Fixing structure for safety fuse of Christmas lamp
DE112006003928B4 (de) * 2006-06-16 2011-05-05 Smart Electronics, Inc. Klein bemessene oberflächenmontierbare Sicherung und Verfahren zu deren Herstellung
US20080143471A1 (en) * 2006-12-15 2008-06-19 Chun-Chang Yen Fuse assembly
US20090108980A1 (en) * 2007-10-09 2009-04-30 Littelfuse, Inc. Fuse providing overcurrent and thermal protection
US8576041B2 (en) * 2008-12-17 2013-11-05 Cooper Technologies Company Radial fuse base and assembly
KR101038401B1 (ko) * 2009-04-21 2011-06-03 스마트전자 주식회사 소형퓨즈 및 그 제조방법
DE102009019059A1 (de) * 2009-04-27 2010-11-04 Chun-Chang Yen Automatischer Fertigungsprozeß für die Basis einer Sicherung sowie eine geeignete Konstruktion für die Basis

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123696A (en) * 1964-03-03 Cffalq l
US1008411A (en) * 1908-11-09 1911-11-14 Henry A Hills Safety device for electrically-heated implements.
FR762124A (fr) * 1932-11-15 1934-04-04 Barette de coupe-circuit en matière isolante moulée avec cloisonnement évitant la propagation de l'arc électrique
FR948836A (fr) * 1947-06-19 1949-08-11 Procédé de fabrication de porte-fusibles
US3253244A (en) * 1963-11-06 1966-05-24 Indak Mfg Corp Electrical resistors
JPS5852289B2 (ja) * 1979-09-08 1983-11-21 エス・オ−・シ−株式会社 超速断型小型ヒユ−ズ
JPS56501663A (fr) * 1979-12-03 1981-11-12
JPS56112856U (fr) * 1980-01-31 1981-08-31
JPS58184219A (ja) * 1982-04-21 1983-10-27 日本電気ホームエレクトロニクス株式会社 温度ヒユ−ズの製造方法
US4483064A (en) * 1982-07-22 1984-11-20 Bel Fuse, Inc. Process of multiple fuse construction
DE8411568U1 (de) * 1984-04-13 1984-08-23 Wickmann-Werke GmbH, 5810 Witten Miniatursicherung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2204457A (en) * 1987-05-05 1988-11-09 Dubilier Plc Sub-miniature fuse
EP0484703A3 (en) * 1990-11-05 1993-03-24 Wickmann-Werke Gmbh Electrical fuse

Also Published As

Publication number Publication date
DE3570011D1 (en) 1989-06-08
JPH0542767B2 (fr) 1993-06-29
EP0154801B1 (fr) 1989-05-03
EP0154801A3 (en) 1986-04-02
ATE42866T1 (de) 1989-05-15
US4628293A (en) 1986-12-09
JPS60258824A (ja) 1985-12-20
DE3408854A1 (de) 1985-09-12

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