EP2954539B1 - Méthode de fabrication d'un ensemble de pattes de connexion comprenant un élément ressort servant de fusible interrupteur - Google Patents

Méthode de fabrication d'un ensemble de pattes de connexion comprenant un élément ressort servant de fusible interrupteur Download PDF

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Publication number
EP2954539B1
EP2954539B1 EP14703569.5A EP14703569A EP2954539B1 EP 2954539 B1 EP2954539 B1 EP 2954539B1 EP 14703569 A EP14703569 A EP 14703569A EP 2954539 B1 EP2954539 B1 EP 2954539B1
Authority
EP
European Patent Office
Prior art keywords
parts
leadframe
metal sheet
sheet
arranged above
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
EP14703569.5A
Other languages
German (de)
English (en)
Other versions
EP2954539A1 (fr
Inventor
Steffen PFÖRTNER
Christian Birkholz
Andrei Siegel
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.)
Phoenix Contact GmbH and Co KG
Original Assignee
Phoenix Contact GmbH and Co KG
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 Phoenix Contact GmbH and Co KG filed Critical Phoenix Contact GmbH and Co KG
Publication of EP2954539A1 publication Critical patent/EP2954539A1/fr
Application granted granted Critical
Publication of EP2954539B1 publication Critical patent/EP2954539B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure

Definitions

  • the invention relates to a method for producing a leadframe.
  • a reduced component insulation strength of a damaged electrical component leads to an increased power conversion, which in turn can cause an inadmissible heating. Such heating can lead to considerable risks to the immediate environment, in particular to the formation of flue gases or to a fire hazard.
  • thermosensitive devices for damaged overvoltage protection components, eg from the DE 42 41 311 A1 , known in which the component to be monitored via a contact element, ie indirectly, thermosensitive is connected.
  • the thermosensitive connection is generally via a solder joint.
  • the contact element is mounted biased or on the contact element acts a force of a second biased element, such as a spring. Exceeds the spring force, the holding force of the thermosensitive pad, eg solder joint, opens the contact and the monitored component is turned off.
  • the invention is based on the object to provide a cost-effective method with which different arrangements can be made, which allow a safe thermal shutdown especially in a small space.
  • the object is achieved according to the invention by a method having the features of claim 1 for producing a leadframe for an electrical component, wherein the leadframe has an integrated thermal switching device.
  • the method comprises a step of forming a spring member from parts of a pre-punched sheet, a step of forming a holding member from parts of the pre-punched sheet, a step of forming clamping contacts from parts of the pre-punched sheet, a step of folding at least another part of the pre-punched sheet in that parts of the prepunched sheet are stacked, and a step of connecting the stacked parts by means of a thermally softenable means, wherein an electrical connection of the stacked parts is made, on.
  • the method further comprises the step of inserting an electrical component.
  • the method further comprises the step of separating parts of the pre-cut sheet metal.
  • the pre-punching of the sheet is also provided.
  • the step of connecting the superimposed parts by means of a thermally softenable agent, soldering or gluing on.
  • the method further comprises the step of folding a further part of the sheet, so that this further part is arranged over the connected superimposed parts of the sheet and spaced therefrom.
  • a second embodiment variant can be produced inexpensively without requiring a completely new design.
  • FIG. 1 a raw form of a leadframe 1 is shown in plan view according to a first preferred embodiment of the invention as a sheet B. This differs from a second preferred embodiment of the invention, which in FIG. 5 is shown, only by the fact that here another metal strip KB is present. This sheet metal strip KB may already be missing from the raw form or else be separated off in one of the steps of the method.
  • the raw form of the leadframe 1 has a substantially planar structure and has pre-punched areas, which are subsequently processed by forming.
  • a spring element FE can be formed in a first processing step.
  • the metal strip FE is made FIG. 1 formed by forming in a bracket, as in FIG. 2b shown in side view.
  • the part of the sheet which forms the holding element HE, marked with a hatching from bottom left to top right.
  • the forms in FIG. 1 right widening of the sheet metal part of a nose.
  • the sheet metal part FE is brought by bending in a U-shape.
  • a holding element HE is formed. This is reshaped so that a receptacle is formed, so that the spring element FE can be held here later.
  • a holding element HE is formed on the metal strip in FIG. 1 Protrusions designed in the direction of the spring element, which now holds after deformation at a latching of the spring element FE this now releasably.
  • the sheet metal part HE is brought by bending in a U-shape.
  • the spring element FE can now be activated by introducing the nose formed on the spring element FE into the holding element HE.
  • one or more terminal contacts KK can also be formed from parts of the pre-cut sheet B.
  • the part of the sheet which forms a clamping contact KK is marked with hatching from bottom right to top left.
  • FIG. 1 shown part bent upwards as in FIG. 2b seen.
  • connection point should be able to be triggered thermally so that a thermally softenable agent L, for example a suitable adhesive or a suitable solder, can be used as connecting means.
  • a thermally softenable agent L for example a suitable adhesive or a suitable solder
  • the thermally softenable agent L is exemplified as a black filled ellipse.
  • This prefabricated leadframe 1 can now be equipped with a suitable component in a further processing step.
  • exemplary electrical components are thermally sensitive components, in particular (metal oxide) varistors or suppressor diodes or spark gaps or gas-filled surge arresters or resistors.
  • the equipment can e.g. have a pressing in molded as cutting contacts contact elements KK.
  • other joining techniques especially soldering techniques, are equally usable.
  • a further processing step according to the invention is now, as in a side view in FIG. 4b and supervision in FIG. 4a shown, at least part of the pre-cut sheet B separated.
  • the retaining strip HS 1 is off Figure 1 to 3b in FIGS. 4a and 4b removed, since this is no longer needed by the connection made of retaining element HE and contact strip KK.
  • the holding strip HS 2 is off Figure 1 to 3b in FIGS. 3a and 3b removed, since now the contact elements KK are connected via the assembled electrical component EB.
  • the in the Figures 1 to 4b differs from the embodiment of FIGS. 5 and 6 in that a further sheet metal strip KB is provided. While in the FIGS. 5 and 6 an arrangement is shown, which acts as a normally closed in a thermal softening of the connection L and thus interrupts a current flow through the electrical component EB, is in the embodiment of the Figures 1 to 4b provided that a short circuit is generated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuses (AREA)
  • Manufacture Of Switches (AREA)

Claims (6)

  1. Procédé, destiné à fabriquer une grille de connexion (1) pour un composant électrique (EB), la grille de connexion (1) comportant un dispositif de commutation (S) thermique intégré, comportant les étapes
    du façonnage d'un élément à ressort (FE) à partir de pièces d'une tôle (B) prédécoupée,
    du façonnage d'un élément de retenue (HE) à partir de pièces de la tôle (B) prédécoupée,
    du façonnage de contacts de bornes (KK) à partir de pièces de la tôle (B) prédécoupée,
    du pliage d'au moins une pièce (HS1) supplémentaire de la tôle prédécoupée, de sorte que des pièces (HE, KK) de la tôle prédécoupée (B) soient placées en superposition,
    de l'assemblage des pièces placées en superposition au moyen d'un produit (L) thermo-ramollissant, sachant qu'on établit une liaison électrique entre les pièces placées en superposition.
  2. Procédé selon la revendication 1, comportant par ailleurs l'étape de l'insertion d'un composant électrique (EB)
  3. Procédé selon la revendication 1 ou 2, comportant par ailleurs l'étape du sectionnement de pièces (HS1, HS2) de la tôle (B) prédécoupée.
  4. Procédé selon l'une quelconque des revendications précédentes, comportant par ailleurs l'étape de la découpe de la tôle (B).
  5. Procédé selon l'une quelconque des revendications précédentes, l'étape de l'assemblage des pièces placées en superposition au moyen d'un produit (L) thermo-ramollissant comportant un brasage ou un collage.
  6. Procédé selon l'une quelconque des revendications précédentes, comportant par ailleurs l'étape du pliage d'une pièce (KB) supplémentaire de la tôle (B), de telle sorte que ladite pièce supplémentaire soit placée au-dessus des pièces assemblées placées en superposition de la tôle (B) et avec un écart par rapport à celles-ci.
EP14703569.5A 2013-02-06 2014-02-04 Méthode de fabrication d'un ensemble de pattes de connexion comprenant un élément ressort servant de fusible interrupteur Active EP2954539B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013201899.1A DE102013201899A1 (de) 2013-02-06 2013-02-06 Verfahren zur Herstellung eines Leadframes
PCT/EP2014/052104 WO2014122110A1 (fr) 2013-02-06 2014-02-04 Procédé de fabrication d'une grille de connexions dotée d'un élément à ressort servant à fixer un organe de coupure

Publications (2)

Publication Number Publication Date
EP2954539A1 EP2954539A1 (fr) 2015-12-16
EP2954539B1 true EP2954539B1 (fr) 2018-08-01

Family

ID=50071602

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14703569.5A Active EP2954539B1 (fr) 2013-02-06 2014-02-04 Méthode de fabrication d'un ensemble de pattes de connexion comprenant un élément ressort servant de fusible interrupteur

Country Status (4)

Country Link
EP (1) EP2954539B1 (fr)
CN (1) CN104995695B (fr)
DE (1) DE102013201899A1 (fr)
WO (1) WO2014122110A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4219304C2 (de) * 1992-06-12 1994-03-31 Roederstein Kondensatoren Zuverlässiges Überstrom-Schutzbauteil mit geringem Platzbedarf und einfachem Aufbau
US5277356A (en) * 1992-06-17 1994-01-11 Rohm Co., Ltd. Wire bonding method
US6104591A (en) * 1998-03-09 2000-08-15 Teccor Electronics, Inc. Telephone line protection element
ATE412244T1 (de) * 2000-04-26 2008-11-15 Littelfuse Ireland Dev Company Thermisch geschützter varistor auf basis eines metalloxids
US8717777B2 (en) * 2005-11-17 2014-05-06 Avx Corporation Electrolytic capacitor with a thin film fuse
DE102006001876A1 (de) * 2006-01-13 2007-11-08 Siemens Ag Bauteil mit einer elektrischen Flachbaugruppe
DE102009048045B4 (de) * 2009-10-02 2011-06-01 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzelement
CN101741081A (zh) * 2010-01-12 2010-06-16 佛山市浦斯电子有限公司 具有热保护功能的电涌抑制器
EP2511915B1 (fr) * 2011-04-13 2016-07-06 Epcos Ag Dispositif électrique

Also Published As

Publication number Publication date
DE102013201899A1 (de) 2014-08-07
CN104995695B (zh) 2018-06-05
CN104995695A (zh) 2015-10-21
WO2014122110A1 (fr) 2014-08-14
EP2954539A1 (fr) 2015-12-16

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