EP0154801B1 - Kleinstsicherung und Herstellungsverfahren hierfür - Google Patents

Kleinstsicherung und Herstellungsverfahren hierfür Download PDF

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Publication number
EP0154801B1
EP0154801B1 EP85101136A EP85101136A EP0154801B1 EP 0154801 B1 EP0154801 B1 EP 0154801B1 EP 85101136 A EP85101136 A EP 85101136A EP 85101136 A EP85101136 A EP 85101136A EP 0154801 B1 EP0154801 B1 EP 0154801B1
Authority
EP
European Patent Office
Prior art keywords
conductors
conductor
mounting
base
receptacle
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
Application number
EP85101136A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0154801A3 (en
EP0154801A2 (de
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/de
Publication of EP0154801A3 publication Critical patent/EP0154801A3/de
Application granted granted Critical
Publication of EP0154801B1 publication Critical patent/EP0154801B1/de
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, a receptacle for the fusible conductor being formed on each conductor above the base and the Connection between the receptacle and the fusible conductor is melted by melting soft solder, as well as a manufacturing process 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 below only with reference to miniature fuses.
  • the fuse element When producing 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, the soldering is carried out by hand in order to establish a reliable connection between the conductors and the fusible conductor.
  • FR-PS 948 836 It is already known (FR-PS 948 836) to insert the fusible conductor ends in grooves or slots at the upper end of the two conductors before the fusible conductor ends are fastened by a solder application.
  • the fuse element can fall out of the slot in the course of further assembly if, for example, an immersion bath is used to apply the solder, and the conductors for this purpose are guided through the bath with the upper ends hanging downward.
  • the fuse element can also slide out of the slot later in use of the fuse if the fuse is arranged, for example, on heat-emitting printed circuit boards or in a housing exposed to heating, where there is a risk that the solder will soften.
  • the heat transferred can influence the soldering point between the connecting pin and the fuse element in such a way that the soldered connection is opened in the worst case.
  • the object of the invention is therefore to create a secure attachment of the fuse element to the conductors.
  • the extraordinarily small dimensions of the fusible link and the conductor must be taken into account, as well as the fact that fuses of the type concerned here are a typical mass-produced item, with which even a small additional effort drastically increases the overall manufacturing costs can cause.
  • the receptacle is formed by rolling in or bending the upper end of the conductor in the manner of an eyelet for embracing and holding the fuse element.
  • the fuse element receives an additional fastening by means of an eyelet-type receptacle through which the fuse element is caught.
  • 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 gripped and held by 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 fuse element can either be retracted or hooked into this receptacle shaped like an eyelet, depending on whether the receptacle completely or partially encompasses the fuse element, or the fuse element is placed on the conductor before it is rolled or bent so that after the formation of the receptacle of the fuse element is already in this.
  • 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 is that a plurality of bases with inserted conductors, at de ren upper ends of the receptacle is prepared, aligned in a row next to each other, a continuous fusible conductor thread is stretched across the upper ends of the conductors in a stretched position and predetermined height, the recording by rolling or bending the upper ends of the conductors to embrace and holding the fusible conductor thread is formed, the soft solder is applied to the receptacle and the fusible conductor in this area and the connecting pieces between the fused conductors are separated. Then the fastening area is reground, cleaned and cleaned if necessary, whereupon the cap is placed on the base and fastened.
  • the preparation of the shape of the receptacle at the upper end of each conductor depending on the desired shape of the receptacle, for example in tilting, namely in a slight bending of the end of the conductor if the receptacle is to be produced by curling.
  • the flat forming and the production of an elongated cutout in the conductor above the base are also part of the preparatory work before the fuse element thread is attached. It is essential that a large number of units consisting of bases with inserted conductors are processed simultaneously by arranging the pedestals in a row in an aligned manner side by side.
  • the fusible conductor thread which runs simultaneously over the entire row of conductors, is encompassed and held by the upper ends of the conductors during 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 operation, and then the so separated formed fuse element from the common thread, whereupon the remaining work can be carried out.
  • a plastic base which is circular in cross section, 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 circuit boards below the base 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 with the inclusion of a dash-dotted fuse element 6 to form a receptacle 5 comprising the fuse element 6, as illustrated in FIG. 2, and after prior tilting at position 7.
  • the solder is then applied 8, followed by 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 conductors 3 has already taken place before they are inserted 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 Position 7 are tilted so that the fusible conductor thread 9 is subsequently captured or encompassed by the receptacle 5 formed, as shown in FIG. 2 by the designation of the fusible conductor 6.
  • the individual fusible conductors 6 are separated therefrom, namely cut off from the common thread, and any necessary remaining work is carried out at the connection points, whereupon the cap (not shown) is placed on the Socket 1 is placed and firmly connected to it.
  • the same size of the eyelet-shaped receptacle 5 for Fusible conductors of different diameters can be used. This is because the gap between the fuse element 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.
  • an even greater capillary effect results from the larger space between it and the receptacle 5, ie 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 also in the further course of the production.

Landscapes

  • Fuses (AREA)
  • Table Devices Or Equipment (AREA)
EP85101136A 1984-03-10 1985-02-04 Kleinstsicherung und Herstellungsverfahren hierfür Expired EP0154801B1 (de)

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 EP0154801A2 (de) 1985-09-18
EP0154801A3 EP0154801A3 (en) 1986-04-02
EP0154801B1 true EP0154801B1 (de) 1989-05-03

Family

ID=6230133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85101136A Expired EP0154801B1 (de) 1984-03-10 1985-02-04 Kleinstsicherung und Herstellungsverfahren hierfür

Country Status (5)

Country Link
US (1) US4628293A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0154801B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS60258824A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) ATE42866T1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE3408854A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (12)

* 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
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
DE9015208U1 (de) * 1990-11-05 1991-01-17 Wickmann-Werke GmbH, 5810 Witten Elektrische Sicherung
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
CN101484962A (zh) * 2006-06-16 2009-07-15 斯玛特电子公司 小尺寸表面安装式熔断器及其制造方法
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
EP0041966A1 (en) * 1979-12-03 1981-12-23 Kenneth E Beswick Limited Method of manufacturing plug-in electrical fuses and a fuse produced by the method
JPS56112856U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 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

Also Published As

Publication number Publication date
EP0154801A3 (en) 1986-04-02
US4628293A (en) 1986-12-09
ATE42866T1 (de) 1989-05-15
JPH0542767B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-06-29
JPS60258824A (ja) 1985-12-20
EP0154801A2 (de) 1985-09-18
DE3570011D1 (en) 1989-06-08
DE3408854A1 (de) 1985-09-12

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