EP2003673B1 - Fusible miniature ainsi que méthode de fabrication d'un fusible miniature - Google Patents

Fusible miniature ainsi que méthode de fabrication d'un fusible miniature Download PDF

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Publication number
EP2003673B1
EP2003673B1 EP20070011792 EP07011792A EP2003673B1 EP 2003673 B1 EP2003673 B1 EP 2003673B1 EP 20070011792 EP20070011792 EP 20070011792 EP 07011792 A EP07011792 A EP 07011792A EP 2003673 B1 EP2003673 B1 EP 2003673B1
Authority
EP
European Patent Office
Prior art keywords
housing
contact
contact element
fuse according
compact 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.)
Active
Application number
EP20070011792
Other languages
German (de)
English (en)
Other versions
EP2003673A1 (fr
Inventor
Alfred Engl
Bruno Betti
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.)
Autecto Industrievertretungen & Co KG GmbH
Original Assignee
Autecto Industrievertretungen & Co KG GmbH
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Publication date
Application filed by Autecto Industrievertretungen & Co KG GmbH filed Critical Autecto Industrievertretungen & Co KG GmbH
Priority to EP20070011792 priority Critical patent/EP2003673B1/fr
Publication of EP2003673A1 publication Critical patent/EP2003673A1/fr
Application granted granted Critical
Publication of EP2003673B1 publication Critical patent/EP2003673B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/0411—Miniature fuses
    • H01H85/0415—Miniature fuses cartridge type
    • H01H85/0417—Miniature fuses cartridge type with parallel side contacts

Definitions

  • the invention relates to a compact fuse, in particular for use in automobiles, with an electrically conductive contact element and a housing made of electrically insulating material, wherein the contact element comprises two spaced-apart contact regions and a melting region arranged between the contact regions. Furthermore, the invention comprises a method for producing such a compact fuse.
  • Fuses are used in many areas of technology, for example in vehicle construction. Depending on the respective field of application, exactly predetermined and standardized connection geometries must be observed. In addition to the connection geometries, however, the fuses must also be designed and designed to meet the technical specifications with regard to the nominal current and the tripping characteristics. Other conditions to be met depend on the specific field of application of the fuse and the feeds suitable for this area.
  • fuses used in the vehicle sector are those skilled in the art, for example, under the terms “Flachsteckêten”, “gentêt SF” or “Multifuse”, i. integrated in Einstandsgitter one piece, known.
  • a so-called low-profile fuse in which a contact element is arranged in a housing made of electrically insulating material, which comprises two spaced-apart contact regions and a melting region arranged between the contact regions. To fix the contact element in the housing, the housing is closed after insertion of the contact element.
  • the GB 2 090 081 A represents the closest prior art, but does not disclose a contact element comprising two contact areas and a melting area arranged therebetween, consists of a sheet material and is arranged in a double-layered manner in the region of the contact areas.
  • the invention has the object to provide a generic compact fuse and a method for producing such a compact fuse that allow easy mass production.
  • the compact fuse according to the invention comprises an electrically conductive contact element and a housing made of electrically insulating material, wherein the contact element has two spaced-apart contact areas and one between comprises the contact areas arranged melting area.
  • the contact areas have positioning areas that engage in a form-fitting manner in corresponding receiving geometries in the housing.
  • the contact element consists of a sheet material, which is arranged in two layers in the region of the contact areas.
  • the positioning areas provide a very simple way to position and fix the contact element in the housing.
  • the advantage of this embodiment is that the provision of the housing and the punching and shaping of the contact element can be carried out in independent production areas and the insertion of the contact element in the housing can be carried out in a single step within the manufacturing process.
  • the design of the contact element with contact areas and melting area of a flat material makes it very easy to realize the desired cross sections for the contact areas as well as the melting area. Since in the melting region, depending on the desired release behavior, in some cases a very small cross-sectional area must be provided, this can also be achieved by adjusting the web width of the melting region, but care must also be taken that very narrow webs are more vulnerable to damage and, in addition, the Material thickness of a strip material can be set with lower tolerances than complex, punched-out geometries. For these reasons, the double-layered forming of the contact regions, but the only single-layered shaping of the melting region is particularly preferred.
  • the contact areas are substantially rectangular, the mutually remote first longitudinal sides of the contacting serve in a fuse holder.
  • This is a simple design, which is particularly advantageous in view of the possibility described later, the contact areas double-layered, is advantageous.
  • the compact fuse further includes test lugs each on a voltage applied to the first longitudinal side of the contact areas, which extend through passages in the housing. Defining the longitudinal sides of the rectangular contact areas, the beauan instruments are each provided on a transverse side. By extending the investigaan accounts through openings in the housing, can be achieved in the process step of inserting the contact element into the housing in a simple way an additional fixation of the contact element in the housing, but also ensure the correct positioning of the contact element in the housing.
  • the sketches each consist of two layers of material, which are braced against each other for positive locking in the housing element.
  • an additional fixation of the contact element in the housing can be achieved, wherein to avoid an additional process step in the production of a compact fuse sketch an accounts for the purchase of a compact fuse sketch an organization, or a compact fuse sketch.
  • the sketches can be shaped so that they are moved elastically to each other when pushed through the opening in the region of the housing and after Passage through the opening in the housing can spring back to their original position in which they fulfill the function of additional fixation of the contact element in the housing.
  • the positioning lugs are preferably arranged in each case on the mutually facing, second longitudinal sides of the contact regions and project at an angle out of the plane of the contact element.
  • the term "plane” must not be interpreted too narrowly in the present case, since the possibility of forming the contact areas in two layers and the possibility described above of designing the double-layered test approaches and bracing them against one another, the contact element originally punched out of a strip material is no longer complete in a common Level is arranged.
  • the term “plane” is therefore intended to refer to the planar arrangement of the contact element as such, whereas the positioning approaches project at an angle from this plane and are preferably bent at an angle of 90 °.
  • the compact fuse further has a protective web on at least one contact region of the contact element, which extends in the direction of the other contact region, without touching it.
  • the prefabricated contact elements are bulk materials which are stored in storage containers and fed to the assembly
  • the protective webs on the contact elements have the function of protecting the melting region and preventing excessive binding of the contact elements with one another.
  • the essential function of the guard bar or guard bars is to protect the melting area in the mounted state of the compact fuse. For this reason, it is not mandatory that the protective web or the protective webs must be located on the contact element. In the same way it is also possible to design a protective web on the housing, which at least reduces the risk that objects can penetrate into the housing and into the region of the melting region and damage the melting region.
  • the melting region is designed such that its length is increased between the contact regions which are locally predetermined due to the connection geometry.
  • the melting area does not represent a straight connection between the contact areas, but has a curved shape or consists of longitudinally adjacent sections, which are arranged at an angle to each other.
  • Such geometries are particularly preferred in the form of an S-shape, V-shape, or W shape.
  • Another advantage of angularly arranged sections is that they can more easily compensate for thermal expansion between the contact areas than a straight connection between the contact areas.
  • the contact element consists of zinc, which is optionally coated with tin, a tin alloy or silver. This coating serves to protect the contact element.
  • the housing is integral with a front-side front element and a subsequent to the front element first housing portion and a second housing portion.
  • the one-piece production of the housing eliminates the step of connecting individual housing parts, which is advantageous in terms of the task of the simplest possible mass production.
  • the inventive method comprises the steps of providing the housing, preferably by injection molding, the punching of the contact element of an optionally coated strip material, the bending of the positioning, so that they can positively engage in the receiving geometries in the housing, and the insertion of the preformed contact element in the housing ,
  • the contact element is folded such that the material is placed over the other in the area of the contact areas in a double-layered manner.
  • the method further comprises the step of bending the test lugs extending through openings in the housing. This can be done before inserting the contact areas in the housing by the contact geometry between scholaran accountsn and the passage opening in the housing are designed so that the scholaransatz or the scholaran algorithms when inserted into the Resilient deform housing and spring back elastically after passing through the opening in the housing. Alternatively, it is also possible to congressbiegen the für Organic Corporation's trademark of the trademark “Stros”) into the Resilient deform housing and spring back elastically after passing through the opening in the housing. Alternatively, it is also possible to committeebiegen the sketch only after insertion of the contact element in the housing. This step can be done simultaneously with the functional test of the compact fuse.
  • the fuse designated generally by reference numeral 10 will hereinafter be referred to as a compact fuse, although in common usage the term "low profile" fuse is also frequently used.
  • the compact fuse 10 consists of a housing 12, and of an electrically conductive contact element 14.
  • the housing 12 has essentially a front-side front element 16 and an adjoining first housing portion 18 and the second housing portion 20.
  • the first and second housing sections are preferably designed in one piece with the front element 16.
  • Between the first housing portion and the second housing portion is a substantially slot-shaped space into which the contact element 14 is inserted, from that in the illustration Fig. 1 the contact areas 22 and 24 are visible.
  • the contact areas are as shown in the illustration Fig. 1 can be seen, double-layered configured with a first portion 22a and 24a and second portion 22b and 24b of the contact area, which lie flat over each other.
  • the contact areas 22 and 24 are preferably chamfered, as indicated by reference numeral 26 in Fig. 1 is shown.
  • the chamfer serves to facilitate the insertion of the compact fuse 10 in a corresponding receiving geometry.
  • the housing shape shown is primarily based on the specification of standardized connection geometries, but in the region of the front element 16 preferably gripping surfaces 28 are provided which facilitate the removal of the compact fuse 10 from a corresponding fuse holder using a special tool.
  • the compact fuse 10 has positioning receptacles 30, which serve a positioning approach each of the two To record contact areas, as shown in the representation in Fig. 2 it becomes clear that a cut through the in Fig. 1 shown housing 10 in the area indicated by reference numeral 32 positioning areas shows.
  • the positioning regions 32 are in the illustrated embodiment according to Fig. 2 bent-up areas in the second section 22b or 24b of the contact region 22 or 24, in which the material of the contact element is partially bent upwards and extends substantially at an angle of 90 ° upwards.
  • the positioning regions 32 are designed with respect to their dimensions but also position on the positioning receptacles 30 in the second housing section 20.
  • identically shaped positioning receptacles 30 are also located in the first housing section 18, so that attention must not be paid to the correct alignment of the housing 12 in the context of the simplest possible mass production.
  • protective webs 34 which are formed from the first portion 22a and 24a of the contact area and the viewer facing opening area between the first housing portion 18 and the second housing portion 20 in Fig. 2 close, so that the risk of damaging the in Fig. 1 and 2 not shown melting range between the contact areas 22, 24 is reduced.
  • the geometry and length, as well as the attachment on one or both sides of the protective webs 34 can be freely selected, as long as there is no short-circuit current between the contact regions 22, 24 can come.
  • Fig. 3 shows a section through the housing 10 in the region of the slot-shaped receptacle between the first Housing portion 18 and second housing portion 20.
  • the first housing portion 18 has positioning receptacles 30, which, as shown in the Fig. 3 can be seen, do not extend over the entire length of the first housing portion, but only over that area in which the corresponding bent or upwardly extending positioning portion 32 of a contact element is located.
  • the front element 16 has through openings 36, which, as will be described later, serve for the passage of test lugs on the contact element. As well as from the representation in Fig. 6 it can be seen, the passage openings 36 are provided with chamfers 38, so that the openings 36 extend to the outside of the compact fuse.
  • the first housing portion 18 has a positioning edge 40, which also serves for the correct insertion of the contact element 14 in the housing 10.
  • Fig. 4 shows an embodiment of a contact element 14 consisting of the contact regions 22, 24 and a melting region 42. Also in Fig. 4 The contact element 14 further comprises test lugs 44, which are integrally formed with the contact element and located on a transverse side of the substantially rectangular contact areas 22, 24. In the area of the lateral side at which the test approaches are located, there is also a corresponding to that in Fig. 3 formed positioning edge shaped positioning 46 formed.
  • Fig. 4 Also shown are the positioning portions 32 which extend from the facing longitudinal sides of the contact portions 22, 24 and, as shown in the side view of FIG Fig. 4 illustrated contact element 14 in Fig. 5 shows are bent at an angle of 90 ° upwards. From the illustration in Fig. 5 It also becomes clear that in the region of the contact regions 22, 24, the material is double-layered, as already based on the Fig. 1 and 2 was apparent. Only the second section 24b or 22b is bent upwards to form a positioning region 32 in each case. The material in the region of the melting region 42 as well as the protective webs 34, however, is formed only a single layer.
  • the contact element is preferably made of zinc, which may optionally be provided with tin, a tin coating or silver.
  • Fig. 6 additionally shows a compact fuse in the assembled state of the front element 16 of the housing, wherein the passage openings 36 and their chamfers are visible. Also visible are the test lugs 44, which in the case of the double-layered folding of the material in the region of the contact regions 24, 26 are also configured as double-layered and can be spread apart in order to realize an additional fixation of the contact element in the housing.
  • the spreading apart of the strigan accounts can be done after assembly, ie the insertion of the contact element in the housing, for example, by simultaneously spreading the strigan accounts carried out when testing the assembled fuse.
  • the test lug is provided only in one layer.
  • Fig. 7 The production of the contact element of a strip material is made Fig. 7 clear.
  • the raw material shown here is still connected to a carrier 48, which is, however, separated in the further production of the contact element. How out Fig. 7 It can be seen that the individual layers of the contact regions 22a, 22b and 24a, 24b are still present separately from one another. Between the individual areas is the fold line 48, to which in the further production of the respective second sections 22 b and 24 b from the plane of the Fig. 7 be placed up and on the sections 22a and 22b. In a further step, the positioning regions 32 are bent upwards and possibly also the test lugs 44 preformed so that they spread apart automatically after insertion of the contact element into the housing.
  • the housing is preferably produced by injection molding, so that only the contact elements must be inserted into the housing and, if appropriate, test lugs can be bent to improve the fixation of the contact elements in the housing.
  • the compact fuse according to the invention and the method for this make a simple and very cost-effective mass production of such components possible.

Landscapes

  • Fuses (AREA)

Claims (12)

  1. Fusible compact, en particulier pour l'utilisation dans des automobiles, comprenant:
    - un élément de contact électriquement conducteur (14); ainsi que
    - un boîtier (12) en matériau électriquement isolant; dans lequel
    - l'élément de contact (14) comprend deux zones de contact espacées l'une de l'autre (22, 24) ainsi qu'une zone de fusion (42) disposée entre les zones de contact;
    dans lequel les zones de contact (22, 24) présentant des zones de positionnement (32) qui font prise par complémentarité de formes dans des géométries de logement (30) de forme correspondante dans le boîtier (12),
    caractérisé en ce que
    l'élément de contact (14) est constitué d'un matériau plat qui est disposé en couches doubles (22a, 22b, 24a, 24b) superposées dans la région des zones de contact (22, 24).
  2. Fusible compact suivant la revendication 1, caractérisé en ce que
    les zones de contact (22, 24) sont essentiellement rectangulaires, les premiers côtés longitudinaux écartés l'un de l'autre servant à établir le contact dans un logement de fusible.
  3. Fusible compact suivant la revendication 2, comprenant en outre des tenons de contrôle (44) respectivement sur un côté des zones de contact (22, 24) reposant contre le premier côté longitudinal, lesquels s'étendent à travers des ouvertures de passage (36) dans le boîtier (12).
  4. Fusible compact suivant la revendication 3, caractérisé en ce que
    les tenons de contrôle (44) sont constitués respectivement de deux couches de matériaux qui sont écartées l'une de l'autre pour le blocage par complémentarité de formes dans le boîtier (12).
  5. Fusible compact selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les tenons de positionnement (32) sont disposés respectivement aux deuxièmes côtés longitudinaux se faisant face des zones de contact (22, 24) et dépassent angulairement du plan de l'élément de contact (14).
  6. Fusible compact selon l'une quelconque des revendications précédentes, comprenant en outre une nervure de protection (34) à au moins une zone de contact (22, 24) de l'élément de contact (14), qui s'étend en direction de l'autre zone de contact sans toucher celle-ci.
  7. Fusible compact selon l'une quelconque des revendications précédentes,
    caractérisé en ce que l'élément de contact (14) est estampé dans un feuillard.
  8. Fusible compact selon l'une quelconque des revendications précédentes,
    caractérisé en ce que la zone de fusion (42) est conçue de telle façon que sa longueur est augmentée entre les zones de contact (22, 24) prévues localement, en particulier en ceci que la zone de fusion (42) présente une forme élancée ou des sections limitrophes qui sont disposées angulairement l'une par rapport à l'autre, possède de manière particulièrement préférée une forme en S, en V ou en W.
  9. Fusible compact selon l'une quelconque des revendications précédentes,
    caractérisé en ce que l'élément de contact (14) est constitué de zinc et est revêtu en option d'étain, d'un alliage d'étain ou d'argent.
  10. Fusible compact selon l'une quelconque des revendications précédentes,
    caractérisé en ce que le boîtier (12) est en une seule pièce avec un élément avant frontal (16) ainsi qu'une première section de boîtier (18) et une deuxième section de boîtier (20) se raccordant à l'élément avant.
  11. Procédé de fabrication d'un fusible compact suivant l'une des revendications précédentes, comprenant les étapes
    (a) mise à disposition du boîtier, de préférence par moulage par injection;
    (b) découpe de l'élément de contact dans un feuillard;
    (c) dépliage des zones de positionnement afin que celles-ci puissent intervenir dans les géométries de logement du boîtier;
    (d) introduction de l'élément de contact dans le boîtier, l'élément de contact étant plié après l'étape (b) ou (c) de telle façon que le matériau est placé en deux couches superposées dans la région des zones de contact.
  12. Procédé suivant la revendication 11 comprenant en outre l'étape (c2) dépliage des tenons de contrôle s'étendant à travers une ouverture dans le boîtier.
EP20070011792 2007-06-15 2007-06-15 Fusible miniature ainsi que méthode de fabrication d'un fusible miniature Active EP2003673B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20070011792 EP2003673B1 (fr) 2007-06-15 2007-06-15 Fusible miniature ainsi que méthode de fabrication d'un fusible miniature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20070011792 EP2003673B1 (fr) 2007-06-15 2007-06-15 Fusible miniature ainsi que méthode de fabrication d'un fusible miniature

Publications (2)

Publication Number Publication Date
EP2003673A1 EP2003673A1 (fr) 2008-12-17
EP2003673B1 true EP2003673B1 (fr) 2014-09-17

Family

ID=38226418

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070011792 Active EP2003673B1 (fr) 2007-06-15 2007-06-15 Fusible miniature ainsi que méthode de fabrication d'un fusible miniature

Country Status (1)

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EP (1) EP2003673B1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2090081B (en) 1980-12-08 1984-03-28 Bosley Sydney Stanley Plug-in and in-line electrical fuses
CA1203826A (fr) * 1982-08-05 1986-04-29 Kabushiki Kaisha T An T Bloc compact porte-fusibles
US4997393A (en) * 1989-03-23 1991-03-05 Littelfuse, Inc. Housing assembly for plug-in electrical element having blade-type terminals
JP2552868Y2 (ja) * 1992-12-01 1997-10-29 矢崎総業株式会社 遅断ヒューズ
JP4104817B2 (ja) 2000-11-22 2008-06-18 太平洋精工株式会社 ブレード形ヒューズ

Also Published As

Publication number Publication date
EP2003673A1 (fr) 2008-12-17

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