EP0285489A1 - Flat fuse - Google Patents

Flat fuse Download PDF

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Publication number
EP0285489A1
EP0285489A1 EP88400626A EP88400626A EP0285489A1 EP 0285489 A1 EP0285489 A1 EP 0285489A1 EP 88400626 A EP88400626 A EP 88400626A EP 88400626 A EP88400626 A EP 88400626A EP 0285489 A1 EP0285489 A1 EP 0285489A1
Authority
EP
European Patent Office
Prior art keywords
support body
fuse
fuse according
support
pins
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
EP88400626A
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German (de)
French (fr)
Other versions
EP0285489B1 (en
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
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Filing date
Publication date
Application filed by Dav SA filed Critical Dav SA
Publication of EP0285489A1 publication Critical patent/EP0285489A1/en
Application granted granted Critical
Publication of EP0285489B1 publication Critical patent/EP0285489B1/en
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 patent No. 82 13 847 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 pins. hooking for said connection tabs, the free ends of the hooking pins being located in a plane different from the plane containing said connection tabs.
  • 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.
  • a very specific tool to carry out the introduction of the one-piece conductive element into the also one-piece case, then another very specific tool for the partial melting of the material constituting the case is made to the right of the holes of the connection tabs, failing which the fuse thus obtained could not function correctly.
  • the present invention relates to a flat fuse of the type described in French patent No. 82 13 487 but which overcomes the aforementioned drawbacks.
  • An object of the present invention is a flat fuse which is very easy to produce and has a low cost price, and above all capable of being manufactured from separate strips, to facilitate the automation of its insertion into interconnection boxes, and as a continuous strip.
  • the present invention relates to a flat fuse of the type comprising a support body open on one of the large lateral faces; a conductive element constituted by two separate flat connection tongues, situated in the same plane and pluggable by the lower ends, and by a fusible part connecting the upper ends of said tongues; a cover capable of closing said open face of the support body; latching pins provided on the other closed lateral face of the support body and each inserting into an orifice provided in each connection tab, said latching pins having crimped free ends situated in a plane different from the plane of the tabs connection, and it is characterized in that the cover comprises: an internal bearing surface coming into contact on a bearing edge formed in the support body; an outer rim formed on the face opposite to that comprising the bearing surface, and orifices for the passage of the crimping pins provided on the cover of the support body.
  • 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.
  • connection tabs Another characteristic is that the crimping pins pass through the connection tabs which reinforces the fixing of said connection tabs to the support body.
  • 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 fittings, 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 (2) which is open on one of the large lateral faces as it appears in FIG. 4, comprises on the closed face (13) opposite the open face a bearing edge (14) on which comes press the support surface (6) of the cover (2) when the latter is embedded in the support body.
  • 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.
  • the conductive element the upper part of which is represented in FIGS. 7 to 9 which illustrate different configurations of the fuse part as a function of the current intensities passing 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.

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  • Fuses (AREA)

Abstract

It includes a support-body (1), a conductive element (4) consisting of connection tabs (3) and a fuse piece, a cover (2) characterised in that the cover includes: an inner bearing surface (6) coming into contact with a bearing border (14) allowed for in the support-body; an outer rim (8) allowed for on the face opposite that comprising the bearing surface, and orifices for the passage of the crimping studs (25-27) which are provided on the closed face of the support-body. Fuse which can be used in particular in the interconnection boxes of motor vehicles. <IMAGE>

Description

La présente invention concerne un fusible plat utilisé comme coupe-circuit et, plus particulièrement un coupe-circuit comprenant un corps-support isolant dans lequel est monté un élément conducteur constitué par deux languettes de connexion enfichables réunies par une partie fusible.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.

De plus en plus sont utilisés de tels fusibles plats, enfichables dans des réceptacles correspondants de platines de servitude et de boîtier d'interconnexion, pour des raisons d'encombrement, des qualités de protection et de commodité d'enfichage.More and more are used such flat fuses, pluggable in corresponding receptacles of service plates and interconnection box, for reasons of space, qualities of protection and convenience of plugging.

Un fusible du type rappelé ci-dessus est décrit dans le brevet français N° 82 13 847 et comprend un corps-support ouvert sur une des grandes faces latérales, une partie fusible reliant les extrémités supérieures des languettes de connexion, et des têtons d'accrochage pour lesdites languettes de connexion, les extrémités libres des têtons d'accrochage étant situées dans un plan différent du plan contenant lesdites languettes de connexion.A fuse of the type recalled above is described in French patent No. 82 13 847 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 pins. hooking for said connection tabs, the free ends of the hooking pins being located in a plane different from the plane containing said connection tabs.

Bien qu'un tel fusible ait donné satisfaction, on s'est aperçu qu'il était préférable de fermer la face ouverte de manière à éviter des projections hors du corps-support de petits morceaux de partie fusible lorsque cette dernière claquait au moment d'une surcharge électrique.Although such a fuse has been satisfactory, it has been found that it is preferable to close the open face so as to avoid projections out of the support body of small pieces of fuse part when the latter blows when an electrical overload.

Des fusibles plats à boîtier complètement fermé existent, le plus couramment utilisé étant décrit dans le brevet U.S. N° 3 909 761.Flat fuses with a completely closed housing exist, the most commonly used being described in U.S. Patent No. 3,909,761.

Toutefois, le boîtier est réalisé sous forme monobloc avec de la matière translucide et l'élément conducteur est réalisé également sous forme monobloc, la mise en place et la fixation de l'élément conducteur étant effectuées en introduisant l'élément conducteur à travers un passage ménagé à l'extrémité inférieure du boîtier, puis en déformant à chaud des parties du boitier de manière à introduire une certaine quantite de matière dans des orifices ménagés dans les languettes de connexion de l'élément conducteur. On comprend aisément qu'il est nécessaire d'utiliser un outillage très spécifique pour mener à bien l'introduction de l'élément conducteur monobloc dans le boitier également monobloc, puis un autre outillage très spécifique pour que la fusion partielle de la matière constituant le boitier soit réalisée au droit des orifices des languettes de connexion, faute de quoi le fusible ainsi obtenu ne pourrait fonctionner correctement.However, 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 case, then another very specific tool for the partial melting of the material constituting the case is made to the right of the holes of the connection tabs, failing which the fuse thus obtained could not function correctly.

Par ailleurs, un tel type de fusible est pratiquement impossible à réaliser à partir de bandes séparées. En effet, même si les boitiers monoblocs peuvent être fabriqués en bande ou encore sous forme d'un chapelet de boîtiers, il est difficile de réaliser une introduction individuelle de chacun des éléments conducteurs du chapelet dans un des boitiers de l'autre chapelet.Furthermore, such a type of fuse is practically impossible to produce from separate strips. In fact, even if the monoblock boxes can be manufactured in a strip or even in the form of a chain of boxes, it is difficult to carry out an individual introduction of each of the conductive elements of the chain into one of the boxes of the other chain.

La présente invention concerne un fusible plat du type décrit dans le brevet français N° 82 13 487 mais qui remédie aux inconvénients précités.The present invention relates to a flat fuse of the type described in French patent No. 82 13 487 but which overcomes the aforementioned drawbacks.

Un but de la présente invention est un fusible plat très facile à réaliser et d'un faible prix de revient, et surtout apte à être fabriqué à partir de bandes distinctes, pour faciliter l'automatisation de son insertion sur boîtiers d'interconnexion, et sous forme d'une bande continue.An object of the present invention is a flat fuse which is very easy to produce and has a low cost price, and above all capable of being manufactured from separate strips, to facilitate the automation of its insertion into interconnection boxes, and as a continuous strip.

La présente invention a pour objet un fusible plat du type comprenant un corps-support ouvert sur une des grandes faces latérales ; un élément conducteur constitué par deux languettes de connexion plates distinctes, situées dans un même plan et enfichables par les extrémités inférieures, et par une partie fusible reliant les extrémités supérieures desdites languettes ; un cache susceptible de fermer ladite face ouverte du corps-­support ; des tétons d'accrochage prévus sur l'autre face latérale fermée du corps support et s'insérant chacun dans un orifice ménagé dans chaque languette de connexion, lesdits tétons d'accrochage ayant des extrémités libres serties situées dans un plan différent du plan des languettes de connexion, et il est caractérisé en ce que le cache comprend : une surface d'appui interne venant en contact sur une bordure d'appui ménagée dans le corps support ; un rebord externe ménagé sur la face opposée à celle comportant la surface d'appui, et des orifices pour le passage des tétons de sertissage prévus sur le cache du corps-­support.The present invention relates to a flat fuse of the type comprising a support body open on one of the large lateral faces; a conductive element constituted by two separate flat connection tongues, situated in the same plane and pluggable by the lower ends, and by a fusible part connecting the upper ends of said tongues; a cover capable of closing said open face of the support body; latching pins provided on the other closed lateral face of the support body and each inserting into an orifice provided in each connection tab, said latching pins having crimped free ends situated in a plane different from the plane of the tabs connection, and it is characterized in that the cover comprises: an internal bearing surface coming into contact on a bearing edge formed in the support body; an outer rim formed on the face opposite to that comprising the bearing surface, and orifices for the passage of the crimping pins provided on the cover of the support body.

Un avantage de la présente invention réside dans le fait que le cache est maintenu à une certaine distance des extrémités internes des languettes de connexion et de la partie calibrante pour permettre une meilleure circulation de l'air dans ledit corps-support, permettant le refroidissement des languettes de connexion lorsqu'elles sont traversées par du courant électrique. De plus, le rebord externe permet une tenue correcte du corps du fusible notamment au moyen d'une pince d'extraction, la liaison du cache sur ledit support étant assurée par les tétons de sertissage.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. In addition, 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.

Une autre caractéristique est que les tétons de sertissage traversent les languettes de connexion ce qui renforce la fixation desdites languettes de connexion sur le corps-support.Another characteristic is that the crimping pins pass through the connection tabs which reinforces the fixing of said connection tabs to the support body.

D'autres avantages et caractéristiques apparaîtront dans les revendications et la description qui est donnée à titre d'exemple non limitatif d'un mode de réalisation préféré de l'invention, ainsi que des dessins sur lesquels :

  • La figure 1 est une vue en plan du fusible plat fermé par un cache selon la présente invention.
  • Les figures 2 et 3 sont des vues en coupe du cache seul sans le corps-support suivant des lignes II-II et III-III indiquées sur la figure 1.
  • La figure 4 est une vue en plan à plus grande échelle du corps-support, le cache étant enlevé.
  • Les figures 5 et 6 sont des vues en coupe à plus grande échelle du corps-support respectivement suivant V-V et VI-VI de la figure 4.
  • Les figures 7 à 9 sont des vues en plan de la partie fusible et d'une partie des languettes de connexion de l'élément conducteur.
Other advantages and characteristics will appear in the claims and the description which is given by way of nonlimiting example of a preferred embodiment of the invention, as well as of the drawings in which:
  • Figure 1 is a plan view of the flat fuse closed by a cover according to the present invention.
  • Figures 2 and 3 are sectional views of the cover alone without the support body along lines II-II and III-III indicated in Figure 1.
  • Figure 4 is an enlarged plan view of the support body, the cover being removed.
  • FIGS. 5 and 6 are section views on a larger scale of the support body respectively along VV and VI-VI of FIG. 4.
  • Figures 7 to 9 are plan views of the fuse part and part of the connection tabs of the conductive element.

Le fusible plat, représenté sur la figure 1, comprend un corps-support (1), un cache (2) et un élément conducteur dont seules les extrémités inférieures enfichables (3) des languettes de connexion (4) apparaissent sur la figure 1.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.

Le cache (2) est réalisé suivant une pièce moulée en bande avec des rattaches non représentées, situées chacune en partie inférieure et supérieure, dans l'axe des languettes de con­nexion 4. Ainsi, lors du montage, la bande de caches arrive perpendiculairement à la bande de corps-support qui sont réunis entre eux par une rattache (50) située à la partie supérieure desdits corps-support, au-dessous des moyens de préhension (5) du flexible. Une ouverture élargie (5a) est ménagée dans le corps-­support de manière à assurer la visibilité de l'état de la partie fusible de l'élément conducteur, l'indication du calibre étant portée sur les moyens de préhension (5) en un endroit approprié. Le cache (2) comprend, figure 2, une surface d'appui (6) ménagée sur la face interne (7) et un rebord externe (8) ménagé sur la face externe (9) du cache, le long du bord supérieur (10) de façon que lorsque le cache (2) est encastré dans le corps support (1) comme cela est représenté sur la figure 1, on obtienne une continuité entre les moyens de préhension (5) et le rebord externe (8), c'est-à-dire que la face externe (11) du rebord (8) soit située dans le même plan que la face externe (12) des moyens de préhension (5). La forme du cache (2) est complémentaire de celle du corps-support (1) et le rebord externe (8) sert pour la tenue dudit corps de fusible à l'aide d'une pince d'extraction.The cover (2) is produced according to a part molded in a strip with not shown fittings, each located at the bottom and top, in the axis of the connection tabs 4. Thus, during assembly, 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. 2, a bearing surface (6) formed on the internal face (7) and an external rim (8) formed on the external face (9) of the cover, along the upper edge ( 10) so that when the cover (2) is embedded in the support body (1) as shown in FIG. 1, continuity is obtained between the gripping means (5) and the external rim (8), c that is to say that the outer face (11) of the flange (8) is located in the same plane as the outer face (12) of the gripping means (5). 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.

Le corps-support (2) qui est ouvert sur une des grandes faces latérales comme cela apparaît sur la figure 4, comprend sur la face fermée (13) opposée à la face ouverte une bordure d'appui (14) sur laquelle vient s'appuyer la surface d'appui (6) du cache (2) lorsque ce dernier est encastré dans le corps-support. La bordure d'appui (14) est de forme rectangulaire et il est ménagé entre ses côtés deux alvéoles (15) et (16) séparées par une nervure de renfort transversale (17). Les alvéoles (15) et (16) permettent d'alléger le corps-support dont la rigidification est obtenue au moyen de deux nervures de renfort (18) et (19) disposées sensiblement en forme de V et dirigées, à partir de la bordure d'appui (14) vers la partie supérieure du corps-support (1). Des surépaisseurs locales (20) ménagées aux coins supérieurs du corps-support (1) contribuent au positionnement de la partie calibrante lors de son montage.The support body (2) which is open on one of the large lateral faces as it appears in FIG. 4, comprises on the closed face (13) opposite the open face a bearing edge (14) on which comes press the support surface (6) of the cover (2) when the latter is embedded in the support body. 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.

Des petits rebords d'appui (21) sont également prévus sur les petites faces latérales (22) du corps-support (1) et constituent des éléments d'appui supplémentaires pour le cache (2) et notamment pour la partie supérieure du cache sur laquelle est prévue le rebord externe (8).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).

Deux tétons (23) pour l'accrochage et la fixation des languettes de connexion (4) dont une partie en pointillés est représentée sur la figure 4, sont venus de moulage sur une surépaisseur (24) ménagée à la partie inférieure de la face (13) du corps-support (1).Two pins (23) for hooking and fixing the connection tabs (4), a dotted part of which is shown in FIG. 4, have come from molding on an extra thickness (24) formed at the lower part of the face ( 13) of the support body (1).

Trois tétons de sertissage (25) à (27) disposés en triangle sont également venus de moulage sur la face (13), deux d'entre eux (25) et (26) étant disposés au-dessus des tétons d'accrochage (23) et sur la surépaisseur (24), tandis que le troisième téton (27) est prévu sur le petit côté supérieur de la bordure d'appui (14). Deux petites nervures (28) de renfort pour le téton de sertissage (27) sont prévues perpendiculaires à la nervure (17) et au petit côté (14 a) de la bordure d'appui (14), une des petites nervures (28) étant chanfreinée en (29). Les faces supérieures des nervures (28) et de la bordure d'appui (14) sont situées dans un même plan (30) qui est différent du plan (31) contenant les extrémités libres des tétons d'accrochage (23), le plan (31) étant matérialisé sur la figure 5 par des pointillés. De façon concrète, la longueur des tétons d'accrochage (23) est plus grande que la hauteur de la bordure d'appui (14) lorsqu'on regarde la figure 5. De même, la longueur des tétons de sertissage (25) à (27) est plus grande que celle des tétons d'accrochage (27), comme cela est visible sur la figure 6.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. Concretely, the length of the hooking pins (23) is greater than the height of the support edge (14) when looking at FIG. 5. Likewise, 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.

Les tétons de sertissage (25) et (26) traversent également les languettes de connexion (4) ce qui assure une meilleure fixation de ces dernières dans le corps-support (1), ainsi que des orifices (32) ménagés dans le cache (2) (figures 1 et 2) de manière à permettre de contenir la zone de sertissage desdits tétons lors de la fixation dudit cache (2) sur ledit corps-support (1). Une alvéole borgne (33) est ménagée sur la face externe (9) du cache (2) pour permettre l'entraînement de la bande de fusibles plats terminés.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.

Sur la face interne du cache (2) sont prévues une grande alvéole (34) et deux petites alvéoles (35), l'alvéole (34) étant prévue pour alléger le cache (2) tandis que les alvéoles (35) sont destinés à recevoir les extrémités serties des tétons d'accrochage (figure 3).On the internal face of the cover (2) are provided a large cell (34) and two small cells (35), the cell (34) being designed to lighten the cover (2) while the cells (35) are intended to receive the crimped ends of the latching pins (Figure 3).

Le corps-support (1) et le cache (2) sont réalisés dans une matière plastique opaque, colorée dans sa masse et chargée à environ 15 % à 30 % de fibre de verre selon les calibres, la couleur étant par exemple liée au calibre du fusible plat.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.

L'élément conducteur dont la partie supérieure est représentée sur les figures 7 à 9 qui illustrent différentes configurations de la partie fusible en fonction des intensités de courant traversant l'élément conducteur.The conductive element, the upper part of which is represented in FIGS. 7 to 9 which illustrate different configurations of the fuse part as a function of the current intensities passing through the conductive element.

Dans tous les cas, l'élément conducteur est fabriqué suivant le procédé décrit dans le brevet FR N° 82 13 847, à partir de deux bandes métalliques appropriées se recouvrant partiellement et réunies le long des zones hachurées (36).In all cases, 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).

Ainsi, les trois parties constitutives du fusible plat selon l'invention sont réalisées chacune sous forme de bandes ou chapelets, un premier chapelet de corps-support (1), un deuxième chapelet de caches (2) et un troisième chapelet d'éléments conducteurs (4). Il est facile de constater que suivant la capacité de chaque poste de montage, il est possible de mettre en place simultanément un certain nombre d'éléments conducteurs (4) dans les corps-supports (1) correspondants puis, dans un deuxième poste ou dans le même mais à un stade ultérieur, on ferme simultanément plusieurs corps-supports (1) avec les caches (2) respectifs. Le fusible terminé se présente ainsi sous la forme d'un chapelet mis en rouleaux comportant un très grand nombre de fusibles selon l'invention, de manière à assurer un approvisionne­ment continu sur un poste de pose automatique dans des boîtiers d'interconnexion.Thus, 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.

La partie fusible peut présenter diverses formes comme par exemple celles représentées sur les figures 7 à 9 qui sont données à titre indicatif. D'autres formes peuvent être envisagées.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.

Les expériences réalisées ont montré que pour couvrir toute la gamme des intensités usuelles dans l'activité automobile, la longueur développée de la partie fusible était comprise entre 4 et 25 mm, la largeur étant comprise entre 0.15 et 3 mm et l'épaisseur entre 0,05 et 0,50 mm.The experiments carried out have shown that to cover the whole range of usual intensities in the automotive activity, 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.

La partie de fusible (40) représentée sur la figure (7) et qui correspond notamment à un calibre de 2 A présente une longueur entre des extrémités de liaison (40 a) et (40 b) d'environ 11,60 mm alors que la longueur développée est environ de 17,3 mm. Les liaisons entre les parties planes (40 c) sont effectuées au moyen de parties arrondies (40 d) de manière à éviter des angles aigus ou des pointes qui pourraient être préjudiciables à la durée de vie du fusible.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.

Le fusible représenté sur la figure 8 correspond notamment au calibre (10 A). La partie fusible (41) est sous la forme d'un arc de cercle dont la longueur entre les extrémités (41 a) et (41 b) est d'environ 9,80 mm avec une longueur développée d'environ 12,7 mm.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 .

Enfin, le fusible représenté sur la figure 9 correspond notamment au calibre 5 A. Pour ce calibre la longueur développée de la partie fusible (42) est de 13,6 mm; La partie fusible (42) comprend uniquement des segments en arc de cercle, par exemple au nombre de trois, les deux segments extrèmes (43, 44) présentant un même rayon de courbure avec au sommet un tout petit segment plat (45), tandis que le segment central (46) présente un rayon de courbure plus grand. Les trois segments 43, 44 et 46 sont réunis par des parties courbes pour les mêmes raisons indiquées précédemment.Finally, the fuse shown in FIG. 9 corresponds in particular to the 5 A rating. For this 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.

La partie fusible (42), dans de nombreux cas, présente une longueur développée supérieure à la distance séparant les extrémités de liaisons sur les languettes de connexion. En tout état de cause, la partie fusible (42) se trouve au-dessus d'une ligne passant par lesdites extrémités de liaison, par exemple 40 a et 40 b sur la figure 7 ou 41 a et 41 b sur la figure 8.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 (11)

1. Fusible plat du type comprenant un corps-­support (1) ouvert sur une des grandes faces latérales ; un élément conducteur constitué par deux languettes de connexion (4) plates distinctes, situées dans un même plan et enfichables par les extrémités inférieures (3) ; par une partie fusible (42) reliant les extrémités supé­rieures (40 a, 40 b, 41 a, 41 b) desdites languettes ; un cache (2) susceptible de fermer ladite face ouverte du corps-support ; des tétons d'accrochage (23) prévus sur l'autre face latérale fermée du corps support et s'insérant chacun dans un orifice ménagé dans chaque lan­guette de connexion, lesdits tétons d'accrochage ayant des extrémités libres serties situées dans un plan dif­férent du plan des languettes de connexion et des ori­fices pour le passage des tétons de sertissage (25-27) prévus sur la face fermée du corps-support et traversant les languettes de connexion, caractérisé en ce que le cache comprend : une surface d'appui interne (6) venant en contact sur une bordure d'appui (14) ménagée dans le corps-support ; un rebord externe (8) ménagé sur la face opposée à celle comportant la surface d'appui, ledit rebord externe (8) étant situé le long du bord supérieur du cache et s'encastrant dans une partie de préhension du corps-­support de manière à obtenir une continuité entre ladite partie de préhension et le rebord externe.1. Flat fuse of the type comprising a support body (1) open on one of the large lateral faces; a conductive element constituted by two separate flat connection tabs (4), situated in the same plane and pluggable by the lower ends (3); by a fusible part (42) connecting the upper ends (40 a, 40 b, 41 a, 41 b) of said tabs; a cover (2) capable of closing said open face of the support body; latching pins (23) provided on the other closed side face of the support body and each inserting into an orifice provided in each connection tab, said latching pins having crimped free ends situated in a plane different from the plane of the connection tabs and the orifices for the passage of the crimping pins (25-27) provided on the closed face of the support body and passing through the connection tabs, characterized in that the cover comprises: an internal bearing surface (6) coming into contact on a support edge (14) formed in the support body; an outer rim (8) formed on the face opposite to that comprising the bearing surface, said outer rim (8) being located along the upper edge of the cover and fitting into a grip part of the support body so to obtain continuity between said gripping part and the outer rim. 2. Fusible selon la revendication 1, caractérisé en ce que des nervures de renfort (17-19) et des éléments de butée (21) sont disposés sur la face fermée du corps-­support.2. Fuse according to claim 1, characterized in that reinforcing ribs (17-19) and stop elements (21) are arranged on the closed face of the support body. 3. Fusible selon les revendications 1 et 2, carac­térisé en ce que les éléments de butée (21) sont situés dans un plan inférieur à la bordure d'appui.3. Fuse according to claims 1 and 2, characterized in that the abutment elements (21) are located in a plane below the bearing edge. 4. Fusible selon la revendication 1, caractérisé en ce que les tétons de sertissage (25-27) sont plus longs que les tétons d'accrochage (23).4. Fuse according to claim 1, characterized in that the crimping pins (25-27) are longer than the latching pins (23). 5. Fusible selon la revendication 1, caractérisé en ce que la face interne du cache comprend des empreintes (35) pour le logement des tétons d'accrochage.5. Fuse according to claim 1, characterized in that the internal face of the cover comprises indentations (35) for housing the latching pins. 6. Fusible selon la revendication 1, caractérisé en ce que le corps-support comporte trois tétons de sertis­sage disposés en triangle.6. Fuse according to claim 1, characterized in that the support body comprises three crimping pins arranged in a triangle. 7. Fusible selon la revendication 6, caractérisé en ce qu'un des tétons de sertissage est ménagé sur la bor­dure d'appui.7. A fuse according to claim 6, characterized in that one of the crimping pins is formed on the bearing edge. 8. Fusible selon la revendication 2, caractérisé en ce que les nervures de renfort sont disposées en V et sont dirigées vers la partie supérieure du corps-support sensiblement à partir de la bordure d'appui.8. Fuse according to claim 2, characterized in that the reinforcing ribs are arranged in a V and are directed towards the upper part of the support body substantially from the bearing edge. 9. Fusible selon les revendications 1 et 7, carac­térisé en ce qu'il comprend, en outre, de petites nervures de renfort (29) pour le téton de sertissage ménagé sur la bordure d'appui, les faces libres desdites petites nervures étant situées dans le plan contenant la bordure d'appui.9. A fuse according to claims 1 and 7, characterized in that it further comprises small reinforcing ribs (29) for the crimping stud provided on the bearing edge, the free faces of said small ribs being located in the plane containing the support border. 10. Fusible selon les revendications 1 et 9, carac térisé en ce que la bordure d'appui (8) est renforcée par une nervure de renfort perpendiculaire aux petites nervures de renfort.10. A fuse according to claims 1 and 9, charac terized in that the support edge (8) is reinforced by a reinforcing rib perpendicular to the small reinforcing ribs. 11. Fusible selon la revendication 1, caractérisé en ce que la partie fusible (42) présente une longueur déve­loppée supérieure à la distance séparant les extrémités supé­rieures de liaison (40a-40b, 41a, 41b) des languettes de connexion (3), ladite partie fusible étant située au-dessus d'une ligne passant par lesdites extrémités de liaison.11. Fuse according to claim 1, characterized in that the fuse part (42) has a developed length greater than the distance separating the upper connection ends (40a-40b, 41a, 41b) of the connection tabs (3), said fuse part being located above a line passing through said connection ends.
EP19880400626 1987-03-30 1988-03-16 Flat fuse Expired - Lifetime EP0285489B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8704382 1987-03-30
FR8704382A FR2613532B1 (en) 1987-03-30 1987-03-30 FLAT FUSE

Publications (2)

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

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EP19880400626 Expired - Lifetime EP0285489B1 (en) 1987-03-30 1988-03-16 Flat fuse

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EP (1) EP0285489B1 (en)
DE (1) DE3885492T2 (en)
ES (1) ES2046313T3 (en)
FR (1) FR2613532B1 (en)

Cited By (6)

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FR2671663A1 (en) * 1991-01-16 1992-07-17 Dav Flat fuse for high rated currents
WO2000052724A1 (en) * 1999-03-04 2000-09-08 Littelfuse, Inc. High voltage automotive fuse
EP1093146A2 (en) * 2000-05-16 2001-04-18 Yazaki Corporation Fuse
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
US7659804B2 (en) 2004-09-15 2010-02-09 Littelfuse, Inc. High voltage/high current fuse

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
JP2001266732A (en) * 2000-03-22 2001-09-28 Yazaki Corp Fuse
US7983024B2 (en) 2007-04-24 2011-07-19 Littelfuse, Inc. Fuse card system for automotive circuit protection
IT201900018947A1 (en) 2019-10-16 2021-04-16 Audio Ohm Di Tonani Caterina & C S R L Electric fuse

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GB2069777A (en) * 1980-02-14 1981-08-26 Labinal Electrical fuse
GB2081031A (en) * 1980-07-23 1982-02-10 Lucas Industries Ltd Manufacturing Plug-in Fuses
FR2491255A1 (en) * 1980-09-30 1982-04-02 Dav Ind Automobile fuse mounted on flat plastics - uses integrally moulded hand grip, and has two folded metal male contacts linked by fusible element
FR2521775A3 (en) * 1982-02-12 1983-08-19 Codognese Meccanotec FUSE CIRCUIT BREAKER WITH COPLANAR AND PARALLEL CONTACT BLADES
FR2531569A1 (en) * 1982-08-09 1984-02-10 Dav Ind Circuit-breaker and method for the continuous manufacture of the same
US4504816A (en) * 1983-10-31 1985-03-12 Parker-Hannifin Corporation Blade fuse and manufacturing method

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Publication number Priority date Publication date Assignee Title
GB2069777A (en) * 1980-02-14 1981-08-26 Labinal Electrical fuse
GB2081031A (en) * 1980-07-23 1982-02-10 Lucas Industries Ltd Manufacturing Plug-in Fuses
FR2491255A1 (en) * 1980-09-30 1982-04-02 Dav Ind Automobile fuse mounted on flat plastics - uses integrally moulded hand grip, and has two folded metal male contacts linked by fusible element
FR2521775A3 (en) * 1982-02-12 1983-08-19 Codognese Meccanotec FUSE CIRCUIT BREAKER WITH COPLANAR AND PARALLEL CONTACT BLADES
FR2531569A1 (en) * 1982-08-09 1984-02-10 Dav Ind Circuit-breaker and method for the continuous manufacture of the same
US4504816A (en) * 1983-10-31 1985-03-12 Parker-Hannifin Corporation Blade fuse and manufacturing method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2671663A1 (en) * 1991-01-16 1992-07-17 Dav Flat fuse for high rated currents
WO2000052724A1 (en) * 1999-03-04 2000-09-08 Littelfuse, Inc. High voltage automotive fuse
US6452474B1 (en) 1999-03-04 2002-09-17 Littelfuse, Inc. Barrier fuse
US6642834B1 (en) 1999-03-04 2003-11-04 Littelfuse, Inc. High voltage automotive use
EP1093146A2 (en) * 2000-05-16 2001-04-18 Yazaki Corporation Fuse
EP1093146A3 (en) * 2000-05-16 2002-01-30 Yazaki Corporation Fuse
US6556120B2 (en) 2000-05-16 2003-04-29 Yazaki Corporation Fuse
US6753753B2 (en) 2000-05-16 2004-06-22 Yazaki Corporation Fuse
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
US7659804B2 (en) 2004-09-15 2010-02-09 Littelfuse, Inc. High voltage/high current fuse

Also Published As

Publication number Publication date
DE3885492T2 (en) 1994-03-17
FR2613532B1 (en) 1995-01-20
DE3885492D1 (en) 1993-12-16
EP0285489B1 (en) 1993-11-10
FR2613532A1 (en) 1988-10-07
ES2046313T3 (en) 1994-02-01

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