EP0285489B1 - Flachsicherung - Google Patents

Flachsicherung Download PDF

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Publication number
EP0285489B1
EP0285489B1 EP19880400626 EP88400626A EP0285489B1 EP 0285489 B1 EP0285489 B1 EP 0285489B1 EP 19880400626 EP19880400626 EP 19880400626 EP 88400626 A EP88400626 A EP 88400626A EP 0285489 B1 EP0285489 B1 EP 0285489B1
Authority
EP
European Patent Office
Prior art keywords
support body
support
fuse according
stubs
fuse
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
EP19880400626
Other languages
English (en)
French (fr)
Other versions
EP0285489A1 (de
Inventor
Jean-Michel Saulgeot
Jean-Claude Meynet
René Ducruet
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.)
Dav SA
Original Assignee
Dav SA
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 Dav SA filed Critical Dav SA
Publication of EP0285489A1 publication Critical patent/EP0285489A1/de
Application granted granted Critical
Publication of EP0285489B1 publication Critical patent/EP0285489B1/de
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
    • H01H85/0417—Miniature fuses cartridge type with parallel side contacts

Definitions

  • the present invention relates to a flat fuse used as a circuit breaker and, more particularly, a circuit breaker comprising an insulating support body in which is mounted a conductive element constituted by two pluggable connection tabs joined by a fuse part.
  • a fuse of the type recalled above is described in French patents FR-A-2491255 and FR-A-2531569 and comprises a support body open on one of the large lateral faces, a fuse part connecting the upper ends of the connection tabs , and latching pins for said connection tabs, the free ends of the latching pins being located in a plane different from the plane containing said connection tabs.
  • Fuses comprising a two-part housing are described in GB-A-2,069,777 and FR-A-2,521,775.
  • the structure of each of the parts of the housing is designed to correspond to each other and does not include any specific elements. which allow them to be reinforced while reducing the weight of the case by reducing the material used.
  • the housing is made in one-piece form with translucent material and the conductive element is also made in one-piece form, the establishment and fixing of the conductive element being carried out by introducing the conductive element through a passage. formed at the lower end of the housing, then by hot deforming parts of the housing so as to introduce a certain quantity of material into orifices formed in the connection tabs of the conductive element. It is easily understood that it is necessary to use a very specific tool to carry out the introduction of the one-piece conductive element into the also one-piece housing, then another very specific tool for the partial melting of the material constituting the housing is made to the right of the holes of the connection tabs, otherwise the fuse thus obtained could not function properly.
  • the present invention relates to a flat fuse of the type described in GB-A-2 069 777 but which overcomes the aforementioned drawbacks, in particular with regard to stiffening and improving the cooling of the parts through which the electric current passes.
  • An object of the present invention is a flat fuse which is very easy to produce and of low cost, such that it is sufficiently rigid while being light and able to withstand high currents flowing through said fuse.
  • the present invention relates to a flat fuse as defined in the characterizing part of claim 1.
  • An advantage of the present invention lies in the fact that the cover is kept at a certain distance from the internal ends of the connection tabs and from the calibrating part to allow better air circulation in said body-support, allowing the cooling of the connection tabs when they are crossed by electric current.
  • the external rim allows correct holding of the fuse body, in particular by means of an extraction pliers, the connection of the cover to said support being ensured by the crimping pins.
  • the flat fuse shown in Figure 1, comprises a support body (1), a cover (2) and a conductive element of which only the plug-in lower ends (3) of the connection tabs (4) appear in Figure 1.
  • the cover (2) is produced according to a part molded in a strip with not shown connectors, each located at the bottom and top, in the axis of the connection tabs 4.
  • the strip of covers arrives perpendicular to the strip of support body which are joined together by a connector (50) located at the upper part of said support body, below the gripping means (5) of the hose.
  • An enlarged opening (5a) is provided in the support body so as to ensure visibility of the state of the fusible part of the conductive element, the indication of the size being carried on the gripping means (5) in one appropriate place.
  • the cover (2) comprises, in FIG.
  • the shape of the cover (2) is complementary to that of the support body (1) and the external rim (8) is used to hold said fuse body using an extraction pliers.
  • the support body (1) which is open on one of the large lateral faces as it appears in FIG. 4, comprises on the bottom 13 of the open lateral face a bearing edge (14) on which the surface is supported. support (6) of the cover (2) when the latter is embedded in the body-support.
  • the support edge (14) is rectangular in shape and there are formed between its sides two cells (15) and (16) separated by a transverse reinforcing rib (17).
  • the cells (15) and (16) make it possible to lighten the support body, the stiffening of which is obtained by means of two reinforcing ribs (18) and (19) arranged substantially in the shape of a V and directed from the edge.
  • support (14) towards the upper part of the support body (1).
  • Local extra thicknesses (20) provided at the upper corners of the support body (1) contribute to the positioning of the calibrating part during its mounting.
  • Small support flanges (21) are also provided on the small lateral faces (22) of the support body (1) and constitute additional support elements for the cover (2) and in particular for the upper part of the cover on which is provided the outer rim (8).
  • Two pins (23) for hooking and fixing the connection tabs (4) have come from molding on an extra thickness (24) formed at the lower part of the face ( 13) of the support body (1).
  • Three crimp pins (25) to (27) arranged in a triangle have also come from molding on the face (13), two of them (25) and (26) being arranged above the attachment studs (23) and on the extra thickness (24), while the third stud (27) is provided on the small upper side of the border support (14).
  • Two small ribs (28) for reinforcing the crimping stud (27) are provided perpendicular to the rib (17) and to the short side (14a) of the bearing edge (14), one of the small ribs (28) being chamfered in (29).
  • the upper faces of the ribs (28) and of the support edge (14) are located in the same plane (30) which is different from the plane (31) containing the free ends of the attachment studs (23), the plane (31) being shown in FIG. 5 by dotted lines.
  • the length of the hooking pins (23) is greater than the height of the support edge (14) when looking at FIG. 5.
  • the length of the crimping pins (25) to (27) is larger than that of the hooking pins (27), as can be seen in FIG. 6.
  • the crimp pins (25) and (26) also pass through the connection tabs (4) which ensures better fixing of the latter in the support body (1), as well as orifices (32) formed in the cover ( 2) (FIGS. 1 and 2) so as to allow the crimping zone of said studs to be contained during the fixing of said cover (2) on said support body (1).
  • a blind cell (33) is provided on the external face (9) of the cover (2) to allow the strip of terminated flat fuses to be driven.
  • the support body (1) and the cover (2) are made of an opaque plastic material, colored in its mass and loaded with approximately 15% to 30% of glass fiber depending on the sizes, the color being for example linked to the size flat fuse.
  • FIGS. 7 to 9 illustrate different configurations of the fuse part as a function of the intensities of current flowing through the conductive element.
  • the conductive element is manufactured according to the method described in patent FR No. 82 13 847, from two suitable metal strips partially overlapping and joined along the hatched areas (36).
  • the three constituent parts of the flat fuse according to the invention are each produced in the form of strips or chains, a first chain of support body (1), a second chain of covers (2) and a third chain of conductive elements (4). It is easy to see that, depending on the capacity of each mounting station, it is possible to simultaneously set up a certain number of conductive elements (4) in the corresponding support bodies (1) and then, in a second station or in the same but at a later stage, several support bodies (1) are closed simultaneously with the respective covers (2).
  • the finished fuse looks like this of a string placed in rolls comprising a very large number of fuses according to the invention, so as to ensure a continuous supply on an automatic laying station in interconnection boxes.
  • the fuse part can have various shapes such as for example those shown in Figures 7 to 9 which are given for information. Other forms can be envisaged.
  • the developed length of the fusible part was between 4 and 25 mm, the width being between 0.15 and 3 mm and the thickness between 0 , 05 and 0.50 mm.
  • the fuse part (40) shown in FIG. (7) and which corresponds in particular to a 2 A rating has a length between connection ends (40 a) and (40 b) of approximately 11.60 mm while the developed length is approximately 17.3 mm.
  • the connections between the flat parts (40 c) are made by means of rounded parts (40 d) so as to avoid sharp angles or points which could be detrimental to the life of the fuse.
  • the fuse shown in Figure 8 corresponds in particular to the rating (10 A).
  • the fusible part (41) is in the form of an arc of a circle whose length between the ends (41 a) and (41 b) is approximately 9.80 mm with a developed length of approximately 12.7 mm .
  • the fuse shown in FIG. 9 corresponds in particular to the 5 A rating.
  • the developed length of the fuse part (42) is 13.6 mm;
  • the fusible portion (42) only comprises segments in an arc, for example three in number, the two extreme segments (43, 44) having the same radius of curvature with a very small flat segment (45) at the top, while that the central segment (46) has a greater radius of curvature.
  • the three segments 43, 44 and 46 are joined by curved parts for the same reasons indicated above.
  • the fuse part (42) in many cases, has a developed length greater than the distance separating the ends of connections on the connection tabs. In any event, the fuse part (42) is located above a line passing through said connection ends, for example 40 a and 40 b in FIG. 7 or 41 a and 41 b in FIG. 8.

Claims (9)

  1. Flachsicherung des Typs mit einem Trägerkörper (1), der an einer seiner großen Seitenflächen abgedeckt ist; einem Leiterelement, das von zwei getrennten, flachen verbindungslaschen (4), die sich in derselben Ebene befinden und mittels zweier unterer Enden (3) einsteckbar sind, sowie von einem schmelzfähigen Teil (42) gebildet ist, welcher die oberen Enden (40a, 40b, 41a, 41b) der Laschen verbindet; einer Abdeckung (2), die dazu geeignet ist, die offene Seitenfläche des Trägerkörpers zu verschließen; Einhakzapfen (23), die an der genannten Seitenfläche des Trägerkörpers vorgesehen sind und jeweils in eine Öffnung ragen, die in jeder der Verbindungslaschen vorgesehen ist, wobei die Einhakzapfen (23) gepreßte, freie Enden besitzen, die sich in einer Ebene befinden, die von der Ebene der Verbindungslaschen und von Öffnungen für den Durchgang von Preßzapfen (25-27), welche an der genannten Seitenfläche des Trägerkörpers vorgesehen sind und die Verbindungslaschen (4) durchqueren, verschieden ist; einem Hohlraum, der zwischen Seitenkanten ausgespart ist, dadurch gekennzeichnet, daß der Hohlraum vollständig von einer umlaufenden Abstützkante (14) umgeben ist, die zwischen den Einhakzapfen (23) der Verbindungslaschen vorgesehen und in bezug auf die Ebene der Verbindungslaschen erhöht ist, daß der Hohlraum (2) verschiedene Zellen (15, 16) aufweist, die durch eine transversale Verstärkungsrippe (17) getrennt sind, und daß wenigstens einer der Preßzapfen (27) der Abdeckung auf der Abstützkante (14) vorgesehen ist.
  2. Sicherung gemäß Anspruch 1, dadurch gekennzeichnet, daß der Trägerkörper (1) wenigstens drei Preßzapfen (25, 26, 27) enthält, die in einem Dreieck angeordnet und länger als die Einhakzapfen (23) sind.
  3. Sicherung gemäß Anspruch 1, dadurch gekennzeichnet, daß sie außerdem kleine Verstärkungsrippen (29) für den auf der Abstützkante vorgesehenen Preßzapfen aufweist, wobei sich die genannten freien Flächen der kleinen Rippen in der die Abstützkante enthaltenden Ebene befinden.
  4. Sicherung gemäß den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die Verstärkungsrippen (17-19) und die Anschlagelemente (21) auf der geschlossenen Fläche des Trägerkörpers angeordnet sind.
  5. Sicherung gemäß Anspruch 4, dadurch gekennzeichnet, daß sich die Anschlagelemente (21) in einer Ebene unterhalb der Abstützkante befinden.
  6. Sicherung gemäß Anspruch 1, dadurch gekennzeichnet, daß der schmelzfähige Teil (42) von den Verbindungslaschen getrennt ist und in der Abwicklung eine Länge besitzt, die größer als der die oberen Verbindungsenden (40a-40b, 41a, 41b) der Verbindungslaschen (3) trennende Abstand ist, wobei sich der schmelzfähige Teil oberhalb einer durch die Verbindungsenden verlaufenden Linie befindet.
  7. Sicherung gemäß den Ansprüchen 4 oder 5, dadurch gekennzeichnet, daß die Verstärkungsrippen (18-19) als V angeordnet sind und ausgehend im wesentlichen von der Abstützkante (14) zum oberen Teil des Trägerkörpers gerichtet sind.
  8. Sicherung gemäß Anspruch 1, dadurch gekennzeichnet, daß die Abdeckung (2) eine äußere Kante (8) aufweist, die an der Fläche vorgesehen ist, die von derjenigen abgewandt ist, die die Abstützfläche enthält, wobei die äußere Kante (8) entlang der Oberkante der Abdeckung angeordnet ist und in einen Eingriffteil des Trägerkörpers eingelassen ist, derart, daß zwischen dem Eingriffteil und der äußeren Kante eine ununterbrochene Verbindung erhalten wird.
  9. Sicherung gemäß einem der Ansprüche 1 oder 8, dadurch gekennzeichnet, daß die Innenfläche der Abdeckung Vertiefungen (35) für die Aufnahme der Einhakzapfen enthält.
EP19880400626 1987-03-30 1988-03-16 Flachsicherung Expired - Lifetime EP0285489B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8704382A FR2613532B1 (fr) 1987-03-30 1987-03-30 Fusible plat
FR8704382 1987-03-30

Publications (2)

Publication Number Publication Date
EP0285489A1 EP0285489A1 (de) 1988-10-05
EP0285489B1 true EP0285489B1 (de) 1993-11-10

Family

ID=9349555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880400626 Expired - Lifetime EP0285489B1 (de) 1987-03-30 1988-03-16 Flachsicherung

Country Status (4)

Country Link
EP (1) EP0285489B1 (de)
DE (1) DE3885492T2 (de)
ES (1) ES2046313T3 (de)
FR (1) FR2613532B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7983024B2 (en) 2007-04-24 2011-07-19 Littelfuse, Inc. Fuse card system for automotive circuit protection

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2671663A1 (fr) * 1991-01-16 1992-07-17 Dav Fusible plat pour courants nominaux eleves.
US6642834B1 (en) * 1999-03-04 2003-11-04 Littelfuse, Inc. High voltage automotive use
JP2001266732A (ja) * 2000-03-22 2001-09-28 Yazaki Corp ヒューズ
JP3242095B2 (ja) * 2000-05-16 2001-12-25 矢崎総業株式会社 ヒューズ
US6878004B2 (en) 2002-03-04 2005-04-12 Littelfuse, Inc. Multi-element fuse array
US7233474B2 (en) 2003-11-26 2007-06-19 Littelfuse, Inc. Vehicle electrical protection device and system employing same
EP1797576A4 (de) 2004-09-15 2008-12-10 Littelfuse Inc Hochspannungs-/hochstromsicherung
IT201900018947A1 (it) 2019-10-16 2021-04-16 Audio Ohm Di Tonani Caterina & C S R L Fusibile elettrico

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE454308B (sv) * 1980-02-14 1988-04-18 Labinal Forfarande for framstellning av en smeltsekring samt maskin for utforande av det nemnda forfarandet
GB2081031B (en) * 1980-07-23 1984-04-18 Lucas Industries Ltd Manufacturing plug-in fuses
FR2491255B1 (fr) * 1980-09-30 1985-07-05 Dav Ind Fusible
IT8220831V0 (it) * 1982-02-12 1982-02-12 Codognese Meccanotec Valvola fusibile, con contatti lamellari complanari e paralleli.
FR2531569B1 (fr) * 1982-08-09 1985-12-20 Dav Ind Coupe-circuit et son procede de fabrication en continu
US4504816A (en) * 1983-10-31 1985-03-12 Parker-Hannifin Corporation Blade fuse and manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7983024B2 (en) 2007-04-24 2011-07-19 Littelfuse, Inc. Fuse card system for automotive circuit protection

Also Published As

Publication number Publication date
ES2046313T3 (es) 1994-02-01
EP0285489A1 (de) 1988-10-05
FR2613532B1 (fr) 1995-01-20
DE3885492D1 (de) 1993-12-16
FR2613532A1 (fr) 1988-10-07
DE3885492T2 (de) 1994-03-17

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