EP0924734A1 - Dispositif de protection à courant fort - Google Patents

Dispositif de protection à courant fort Download PDF

Info

Publication number
EP0924734A1
EP0924734A1 EP97830680A EP97830680A EP0924734A1 EP 0924734 A1 EP0924734 A1 EP 0924734A1 EP 97830680 A EP97830680 A EP 97830680A EP 97830680 A EP97830680 A EP 97830680A EP 0924734 A1 EP0924734 A1 EP 0924734A1
Authority
EP
European Patent Office
Prior art keywords
conductive
fuse
input portion
cover
support 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
EP97830680A
Other languages
German (de)
English (en)
Other versions
EP0924734B1 (fr
Inventor
Antonio Falchetti
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.)
Meccanotecnica Codognese SpA
Original Assignee
Meccanotecnica Codognese SpA
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 Meccanotecnica Codognese SpA filed Critical Meccanotecnica Codognese SpA
Priority to DE1997626158 priority Critical patent/DE69726158T2/de
Priority to EP19970830680 priority patent/EP0924734B1/fr
Publication of EP0924734A1 publication Critical patent/EP0924734A1/fr
Application granted granted Critical
Publication of EP0924734B1 publication Critical patent/EP0924734B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/044—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H01H2085/0555—Input terminal connected to a plurality of output terminals, e.g. multielectrode
    • 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
    • H01H85/24—Means for preventing insertion of incorrect fuse

Definitions

  • the present invention relates to a high-current protection device, having a protective casing and a conductive input portion electrically connected to a plurality of conductive output portions by respective fuse means with predetermined nominal currents (In).
  • high current is intended to indicate a current intensity greater than or equal to 20A.
  • the invention relates to a high-current protection device for use in the automotive industry and this field will be referred to in non-limiting manner in the following description.
  • the portion of the fuse having a small conductive cross-section is covered by an insulating casing. This is both to prevent dangerous dispersal of molten metal and to ensure suitable thermal insulation.
  • the thermal insulation in fact enables the melting point of the material to be reached even though the resistance of the fuse is low.
  • motor-vehicle manufacturers need to have multiple protection devices ready for fitting in suitable housings so as to connect an input to several outputs with the interposition of a fuse element of predetermined nominal current.
  • the multiple protection devices which are currently used are constituted by multiple fuse-holders each comprising a body of plastics material inside which several power fuses connect a single conductive input portion to a plurality of conductive output portions.
  • Power fuses generally have drilled terminals so that they can be connected to the conductive input or output portions with the use of screw clamping members.
  • the conductive input portion and the conductive output portions comprise means for connection to respective electrical terminals.
  • the said part of the device is preferably a recess formed in the outline of the conductive input portion for engagement with a complementary projecting part of the seat.
  • a multiple high-current protection device according to the present invention is generally indicated 1.
  • the width of the conductive plate 5 is substantially equal to the distance between the rims 6 of the support base 3 so that these rims 6 constitute side walls for restraining the conductive plate 5, as can be seen from Figure 1.
  • Each output portion 8 is connected to the input portion 7 by means of a respective central portion 9 having a cross-section of reduced width.
  • Each central portion 9 constitutes a fuse element of the device 1, that is, the part which, as a result of the circulation of currents of predetermined intensity, is heated until it melts, breaking the electrical continuity between the input portion 7 and the respective output portion 8.
  • the width of each central portion 9 is calibrated in dependence on the nominal current (In) to be attributed to the fuse element.
  • the central portions 9 may be S-shaped.
  • the conductive plate 5 is positioned on the support base 3 so as to be restrained laterally by the rims 6, as explained above, and most of the input portion 7 projects from the upper end 11 of the support base 3.
  • the output portions 8, as well as the central portions 9, on the other hand, are housed entirely within the shape of the support base 3.
  • the cover 4 extends from one rim 6 of the support base 3 to the other so as to cover the central portions 9 of the conductive plate 5 completely and to cover part of both the input portion 7 and the output portions 8.
  • the support base 3 comprises a channel 19 formed within the thickness H and extending from one rim 6 to the other. This channel 19 prevents the central portions 9 from coming into contact with the support base 3.
  • the cover 4 is formed so as to be raised relative to the central portions 9. This advantageously creates an air chamber around the fuse elements, that is, the central portions 9 of the device 1.
  • the cover 4 is push-fitted on the support base 3. It is fixed by a plurality of pins 13, that is eight pins in the embodiment shown, which project from the support base 3 to be fitted by a predetermined force in a corresponding plurality of holes 14 in the cover 4. Since the conductive plate 5 is interposed between the support base 3 and the cover 4, the conductive plate 5 has, in the region of each pin, a through-hole through which the pin can extend.
  • the pins 13 also locate the conductive plate 5 precisely in relation to the support base 3 and also fix the conductive plate 5 to the support base 3.
  • the arrangement of the pins 13 is preferably such that there is at least one pin 13 in the region of each output portion 8 and at least one pair of pins 13 in the region of the input portion 7.
  • the cover 4 comprises a generally cylindrical opening or window 16 in the region of each central portion 9.
  • the openings 16 are closed by respective disc-shaped screens 18 of transparent plastics material such as, for example, polystyrol, polystyrene or methacrylate, each having a pair of diametrally-opposed resilient tabs 17.
  • the disc-shaped screens 18 are push-fitted in the openings 16, engagement teeth of the tabs 17 snap-engaging with the walls of the openings 16.
  • the disc-shaped screens 18 advantageously enable the heat-fusible elements, that is, the central portions 9 housed in the device 1 to be seen.
  • the support base 3 comprises three ribs 10 of predetermined width D extending parallel to the rims 6 from the lower end 12 of the support base as far as the cover 4.
  • the ribs 10 are positioned in the spaces between the conductive output portions 8 and perform the dual task of preventing lateral movements of these portions and preventing any electrical contact between them or between the electrical terminals connected to them, as will become clearer from the following description.
  • Each output portion 8 comprises means for connection to a respective electrical terminal 15.
  • these means comprise a circular opening 20 through which the screw 21 to which the electrical terminal 15 is clamped can extend.
  • the head of the screw 21 is fitted in a seat in the support base 3 which prevents it from rotating, or is incorporated in the plastics of the base.
  • the washers 22 prevent weakening or breakage of the conductive output portions 8, even as a result of tight clamping of the screw.
  • the multiple high-current protection device according to the invention is formed by a small number of parts so that its assembly is easy and quick and can easily be automated.
  • the device 1 comprises a part which is shaped for engagement with a corresponding complementary part of the seat, the shapes of the part and of said complementary part being different for different nominal current values of the fuse means associated with each conductive output portion 8 of the device 1.
  • the housing of the device 1 in the seat is dependent upon the achievement of engagement between the aforementioned part and complementary part. This engagement therefore constitutes a mechanical consent for the insertion in the seat of the correct device 1, that is, a device having the nominal current value required by the technical specification for that particular application in each conductive output portion 8.
  • the aforementioned part is a recess 28 formed in the outline of the conductive input portion 7 for engagement by a corresponding complementary projecting portion of the seat.
  • the fitting of the device 1 in the seat is dependent on the achievement of coupling between the recess 28 and the projection of the seat which, as stated, ensures the correct combination between the seat and the device 1.
  • the conductive output portions 8 may comprise means for connection to respective electrical terminals of a different type.
  • Figures 4 and 5 show a multiple high-current protection device 100 which differs from that of Figure 1 in that the means for connecting the conductive output portions 8 to an electrical terminal 27 comprise a quick-fit electrical connector 25 of known type. This connector is intended to be coupled with a complementary electrical connector 26 carried by the electrical terminal 27.
  • the conductive output portions 8 are shaped so as to form at their ends male connectors 25 for coupling with respective female electrical connectors 26 carried by the electrical terminal 27.
  • the device 100 comprises a tubular protector 29 made of plastics material, associated with the support base 3.
  • Each tubular protector 29 is open at its ends and an electrical connector 25 extends inside it.
  • the electrical connector 26 is fixed inside a tubular protector 31 to be fitted in the protector 29 when the electrical connectors 25 and 26 are coupled with one another.
  • the protector 29 has engagement means 30 of known type for snap-engaging the protector 31, preventing accidental separation of the protectors 29 and 31 and hence of the electrical connectors 25 and 26.
  • the structural solution offered by the device 100 is suitable for use for nominal currents (In) up to 80A, whereas the solution offered by the device 1 with clamping screws (Figure 1) can also be used with nominal currents of much greater intensity.
  • the device 1 having some output portions 8 with quick-fit connectors and the remainder with clamping screws or equivalent means it is possible to use a device 1 having some output portions 8 with quick-fit connectors and the remainder with clamping screws or equivalent means.
  • the multiple high-current protection device according to the present invention has structural and functional characteristics such as to satisfy the requirements mentioned above and at the same time to solve the problems of devices of the prior art.
  • the device according to the invention is constituted by a small number of parts so that its assembly is easy, quick and easily automated.
  • Another advantage of the multiple high-current protection device according to the invention is that it is more compact than devices of the prior art.
  • a further advantage of the multiple high-current protection device according to the invention is that its conductive plate has no joints so that voltage drops and malfunctions due to oxidation of the contacts at the joints are prevented and long-term good operation of the device is ensured.
  • a further advantage of the multiple high-current protection device according to the invention is that it is not necessary to check the conformity of the nominal current values associated with each conductive output portion before fitting it in a seat. In fact, in the event of an error, the device is physically prevented from being fitted in the seat.
  • the means for the connection of the conductive portions to the electrical terminals may be replaced by other functionally equivalent elements.
  • the number of conductive output portions may be greater than that considered in the examples.

Landscapes

  • Fuses (AREA)
EP19970830680 1997-12-17 1997-12-17 Dispositif de protection à courant fort Expired - Lifetime EP0924734B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1997626158 DE69726158T2 (de) 1997-12-17 1997-12-17 Starkstromschutzvorrichtung
EP19970830680 EP0924734B1 (fr) 1997-12-17 1997-12-17 Dispositif de protection à courant fort

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19970830680 EP0924734B1 (fr) 1997-12-17 1997-12-17 Dispositif de protection à courant fort

Publications (2)

Publication Number Publication Date
EP0924734A1 true EP0924734A1 (fr) 1999-06-23
EP0924734B1 EP0924734B1 (fr) 2003-11-12

Family

ID=8230900

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970830680 Expired - Lifetime EP0924734B1 (fr) 1997-12-17 1997-12-17 Dispositif de protection à courant fort

Country Status (2)

Country Link
EP (1) EP0924734B1 (fr)
DE (1) DE69726158T2 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1075012A2 (fr) * 1999-08-06 2001-02-07 Toyota Jidosha Kabushiki Kaisha Dispositif fusible
EP1107275A3 (fr) * 1999-12-03 2002-07-31 Sumitomo Wiring Systems, Ltd. Fusible et son procédé de fabrication
EP1107276A3 (fr) * 1999-12-03 2002-07-31 Sumitomo Wiring Systems, Ltd. Boíte à fusibles
EP1498927A1 (fr) * 2003-07-14 2005-01-19 Meccanotecnica Codognese S.p.A. Dispositif de protection à courant de haute intensité
DE10345994B4 (de) * 2002-10-02 2007-05-31 Yazaki Corp. Schmelzverbindungseinheit
WO2008061627A1 (fr) * 2006-11-22 2008-05-29 Volkswagen Aktiengesellschaft Dispositif de distribution de courant
EP1992047B1 (fr) * 2006-03-03 2014-07-16 Auto-Kabel Management GmbH Installation de répartition de courant ainsi que sa mise en contact et la protection des lignes qui en sortent
DE112011101265B4 (de) * 2010-04-06 2016-03-24 Yazaki Corporation Sicherungseinheit
EP3125268A4 (fr) * 2014-03-26 2017-11-22 Abb AS Ensemble de connexion pour borne de connexion de socle
EP3125269A4 (fr) * 2014-03-26 2017-11-29 Abb As Appareil de borne de connexion de socle
WO2019051375A1 (fr) 2017-09-08 2019-03-14 Littelfuse, Inc. Module de fusible intégré surbaissé
US11189450B2 (en) 2018-06-06 2021-11-30 Littelfuse, Inc. Low profile integrated fuse module

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5189920B2 (ja) 2008-07-25 2013-04-24 矢崎総業株式会社 ヒュージブルリンクユニット
DE102017104607B3 (de) 2017-03-06 2018-06-21 Lisa Dräxlmaier GmbH Sicherungsbrücke für eine Schmelzsicherung, sowie Stromverteiler mit einer Schmelzsicherung und einer solchen Sicherungsbrücke

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9411394U1 (de) * 1994-07-14 1994-09-22 Wilhelm Pudenz GmbH, 27243 Dünsen Sicherungseinsatz und Sicherungshalter hierfür
US5357184A (en) * 1992-04-29 1994-10-18 Associated Equipment Corporation Fuse system for a multiple battery charger
JPH07254346A (ja) * 1994-03-14 1995-10-03 Sumitomo Wiring Syst Ltd 電源保護具
DE29520691U1 (de) * 1995-10-02 1996-07-25 Lisa Dräxlmaier GmbH, 84137 Vilsbiburg Stromverteiler für Kraftfahrzeuge
DE29620424U1 (de) * 1996-11-22 1997-01-16 Lisa Dräxlmaier GmbH, 84137 Vilsbiburg Stromverteilungsvorrichtung
DE19615561A1 (de) * 1996-04-19 1997-10-23 Trw Fahrzeugelektrik Sicherungsbox für Kraftfahrzeuge
EP0803889A2 (fr) * 1996-04-24 1997-10-29 MECCANOTECNICA CODOGNESE S.p.A. Fusible à courants élevés pour véhicules automobiles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5357184A (en) * 1992-04-29 1994-10-18 Associated Equipment Corporation Fuse system for a multiple battery charger
JPH07254346A (ja) * 1994-03-14 1995-10-03 Sumitomo Wiring Syst Ltd 電源保護具
DE9411394U1 (de) * 1994-07-14 1994-09-22 Wilhelm Pudenz GmbH, 27243 Dünsen Sicherungseinsatz und Sicherungshalter hierfür
DE29520691U1 (de) * 1995-10-02 1996-07-25 Lisa Dräxlmaier GmbH, 84137 Vilsbiburg Stromverteiler für Kraftfahrzeuge
DE19615561A1 (de) * 1996-04-19 1997-10-23 Trw Fahrzeugelektrik Sicherungsbox für Kraftfahrzeuge
EP0803889A2 (fr) * 1996-04-24 1997-10-29 MECCANOTECNICA CODOGNESE S.p.A. Fusible à courants élevés pour véhicules automobiles
DE29620424U1 (de) * 1996-11-22 1997-01-16 Lisa Dräxlmaier GmbH, 84137 Vilsbiburg Stromverteilungsvorrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 096, no. 002 29 February 1996 (1996-02-29) *

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1075012A3 (fr) * 1999-08-06 2002-01-30 Toyota Jidosha Kabushiki Kaisha Dispositif fusible
EP1075012A2 (fr) * 1999-08-06 2001-02-07 Toyota Jidosha Kabushiki Kaisha Dispositif fusible
EP1107275A3 (fr) * 1999-12-03 2002-07-31 Sumitomo Wiring Systems, Ltd. Fusible et son procédé de fabrication
EP1107276A3 (fr) * 1999-12-03 2002-07-31 Sumitomo Wiring Systems, Ltd. Boíte à fusibles
US6520804B2 (en) 1999-12-03 2003-02-18 Sumitomo Wiring Systems, Ltd. Fuse box device
US6566599B2 (en) 1999-12-03 2003-05-20 Sumitomo Wiring Systems, Ltd. Fuse unit and manufacturing method thereof
DE10345994B4 (de) * 2002-10-02 2007-05-31 Yazaki Corp. Schmelzverbindungseinheit
EP1498927A1 (fr) * 2003-07-14 2005-01-19 Meccanotecnica Codognese S.p.A. Dispositif de protection à courant de haute intensité
EP3534466A1 (fr) * 2006-03-03 2019-09-04 Auto-Kabel Management GmbH Agencement destiné à la distribution de courant ainsi que sa mise en contact et sécurisation des conduites sortantes
EP1992047B1 (fr) * 2006-03-03 2014-07-16 Auto-Kabel Management GmbH Installation de répartition de courant ainsi que sa mise en contact et la protection des lignes qui en sortent
WO2008061627A1 (fr) * 2006-11-22 2008-05-29 Volkswagen Aktiengesellschaft Dispositif de distribution de courant
DE112011101265B4 (de) * 2010-04-06 2016-03-24 Yazaki Corporation Sicherungseinheit
EP3125269A4 (fr) * 2014-03-26 2017-11-29 Abb As Appareil de borne de connexion de socle
EP3125268A4 (fr) * 2014-03-26 2017-11-22 Abb AS Ensemble de connexion pour borne de connexion de socle
WO2019051375A1 (fr) 2017-09-08 2019-03-14 Littelfuse, Inc. Module de fusible intégré surbaissé
CN111095468A (zh) * 2017-09-08 2020-05-01 力特保险丝公司 低轮廓集成熔断器模块
JP2020533739A (ja) * 2017-09-08 2020-11-19 リテルヒューズ・インク 低プロファイル集積ヒューズモジュール
US11049680B2 (en) 2017-09-08 2021-06-29 Littelfuse, Inc. Low profile integrated fuse module
US11282667B2 (en) 2017-09-08 2022-03-22 Littelfuse, Inc. Low profile integrated fuse module
CN111095468B (zh) * 2017-09-08 2022-04-12 力特保险丝公司 低轮廓集成熔断器模块
US11189450B2 (en) 2018-06-06 2021-11-30 Littelfuse, Inc. Low profile integrated fuse module

Also Published As

Publication number Publication date
DE69726158T2 (de) 2004-08-26
EP0924734B1 (fr) 2003-11-12
DE69726158D1 (de) 2003-12-18

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