EP0740369B1 - Protection contre les court-circuits pour allumeurs électriques d'airbags - Google Patents

Protection contre les court-circuits pour allumeurs électriques d'airbags Download PDF

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Publication number
EP0740369B1
EP0740369B1 EP96106772A EP96106772A EP0740369B1 EP 0740369 B1 EP0740369 B1 EP 0740369B1 EP 96106772 A EP96106772 A EP 96106772A EP 96106772 A EP96106772 A EP 96106772A EP 0740369 B1 EP0740369 B1 EP 0740369B1
Authority
EP
European Patent Office
Prior art keywords
short
jack
circuit protection
contact springs
contact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96106772A
Other languages
German (de)
English (en)
Other versions
EP0740369A2 (fr
EP0740369A3 (fr
Inventor
Klaus Bahm
Karl-Heinz Krauter
Reiner Gebhard
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.)
Doduco Contacts and Refining GmbH
Original Assignee
AMI Doduco GmbH
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 AMI Doduco GmbH filed Critical AMI Doduco GmbH
Publication of EP0740369A2 publication Critical patent/EP0740369A2/fr
Publication of EP0740369A3 publication Critical patent/EP0740369A3/fr
Application granted granted Critical
Publication of EP0740369B1 publication Critical patent/EP0740369B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/18—Safety initiators resistant to premature firing by static electricity or stray currents
    • F42B3/182—Safety initiators resistant to premature firing by static electricity or stray currents having shunting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/06—Electric contact parts specially adapted for use with electric fuzes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part

Definitions

  • the invention is based on a short-circuit protection with in the preamble of claim 1 specified features.
  • Such a short-circuit protection is known from DE-28 30 552 C2.
  • Inflation of an airbag takes less than 1 s relatively large gas volume required.
  • the gas volume is usually determined using pyrotechnic, chemical or pneumatic gas generators.
  • these gas generators with an explosive device to ignite.
  • This explosive device usually consists of a powder charge electrically by means of a filament or by means of a sputtered Au layer is ignited. So that the airbag can fulfill its safety task, is required one detonator with a very short reaction time.
  • Such detonators are highly sensitive. It is therefore imperative to take precautions to prevent the detonators are ignited unintentionally, e.g.
  • the short-circuit spring closes the contact pins of the Detonator in all situations where the detonator is not using the trigger circuit of the airbag is connected, defines briefly and thereby prevents accidental Deployment of the airbag.
  • the short-circuit protection is formed by two Contact springs, which are connected by a common foot and into a socket are made of plastic, into which the contact pins of the igniter protrude.
  • the contact springs rest resiliently on the two contact pins and are only from the contact pins by inserting a plug into the socket lifted; this connector connects the contact pins of the igniter the trigger circuit of the airbag and presses the two contact springs when inserting into the socket apart.
  • the plug is pulled out of the socket: In this case First short-circuit the two contact pins by applying the contact springs and only then does the connection to the airbag deployment circuit interrupted.
  • Known short-circuit springs for airbags consist of hardenable copper beryllium, which is gold-plated in the contact area. Hardenable copper beryllium is used to achieve the necessary tight bend radii to be able to.
  • the short-circuit spring is first made soft by punching, Bending and gilding formed and then in an elaborate annealing process tempered and brought to the desired final hardness. After the glow the short circuit spring in the plastic bushing in the correct, by the location of the contact pins used in the specified position and according to the information in the DE 28 30 552 C2 therein by welding, gluing, pressing into guide grooves, Spread or the like set. This type of assembly is complex and determines the price of the short-circuit protection to a large extent.
  • EP-A-0 650 229 shows a short-circuit protection for electrical igniters of airbags with a non-conductive socket in which a contact spring is arranged.
  • the contact spring has two free contact ends and one connecting them Foot part, which is inserted into a recess of the socket. This has the disadvantage that the contact spring in the recess of the socket in a separate operation must be inserted.
  • the contact ends are made up of two contact pins one Detonator for the airbag deflected outward against its spring force, being rest on the contact pins.
  • the present invention has for its object to show a way like the short-circuit protection for airbags without loss of functional safety can be cheaper.
  • the short-circuit spring can therefore be formed from the start from hardened contact spring material and no longer has to be remunerated. That makes it possible Short-circuit springs made from a band-shaped contact spring material, in particular from factory-tempered CuBe, by punching and bending, however initially not to be separated, but with a remaining side stripe of the tape so that they are punched and bent, but still connected as a band-shaped semi-finished product Injection molding machine can feed, in which the foot parts of the short-circuit springs, while still hanging on the side strip of the ribbon to form the Bushings are encapsulated with the plastic, preferably in multiple molds, which have several mold cavities for simultaneous injection of several Have sockets.
  • Such a band-shaped semi-finished product is for an automated one Working method particularly suitable. It also allows temporary storage the short-circuit springs wound into a roll as well as the intermediate storage the already encapsulated short-circuit springs wound on a roll until further processing. But it is also possible to use a punching and bending machine leaving band-shaped semi-finished products directly via a buffer loop an injection molding machine with multiple tools, if these are coordinated in their work cycle.
  • the separation points of the webs, with which the foot part in the band-shaped semi-finished product with its side strips connected were at least one, preferably at two adjacent locations on an end face of the bushing, in particular in a recess in the end face, around the separation points against unintentional contact protect.
  • the short-circuit fuses are only separated after injection molding, especially immediately before assembly with the igniter for the airbag instead, so that there too the advantages of rational production "off the line” can be.
  • predetermined breaking points are formed, which easily break off the spring-hard Material at a given point, conveniently immediately the surface of the socket, where the plastic webs come to light, enable.
  • each foot section with a single web to connect the side strip of the tape.
  • the common foot part of the two contact springs which the Short circuit should embed in the plastic.
  • the foot part outgoing contact springs from the plastic are on the inside the socket preferably provided two axially parallel grooves in the Near one end of the foot part of the short-circuit spring made of plastic emerges from where the two contact springs are in accordance with the shape, obtained by the previous stamping-bending process in the direction extend on the longitudinal axis of the socket. If the contact springs through inserting a plug, which is the connection to the trigger circuit the airbag manufactures, can be pushed away from each other, they can get into this Retract both axially parallel grooves and thereby create space for the Plug.
  • the contact springs are preferably to form a pronounced Formed headboard, in particular bent so that it with its end edge are directed against the longitudinal axis of the socket. This results in a high specific contact pressure of the contact springs on the contact pins they should short-circuit, which makes it possible even thin passivating oxide skins to penetrate.
  • the Contact springs also have a widened head section, so that even then, if they should have a certain imbalance, still reliable contact do.
  • the foot part should only partially enclose the passage of the socket, preferably around 314 of its size.
  • the webs that make up the foot section connect to the side strip of the semi-finished product, in the area between two associated contact springs, and moreover should Foot section over the two foot points of the associated contact springs extend beyond, so that the contact springs not only on one side, but to both Sides of their base point through a section embedded in the plastic of the foot section are held.
  • the socket expediently has on its inside and / or on its outside at least one axially parallel guide groove or guide surface, as in Connectors per se are common for connecting to the plug of the Trigger circuit and easier with the igniter.
  • This training occurs the foot part of the short-circuit spring expediently on one of these Guide surfaces or grooves to reveal additional contact to enable.
  • the short-circuit fuse has an essentially cylindrical socket 1 Plastic with two oppositely directed, parallel, planes Flattenings 2 and 3, which start from one end 4 of the socket extend approximately over half their length on the outside.
  • the socket 1 has a full length slot in the middle of the flat 2 5, except for near the end 4 of the socket, where there is an inwardly projecting Bridge 6 is located, the peripheral wall of the sleeve 1 separates.
  • the Slot 5 diametrically opposite is in the inside of the peripheral wall the sleeve 1 an axially parallel groove 7, which from the other end the sleeve 1, which is chamfered both inside and outside, up to one the opposite end 4 provided thickening 9 of the peripheral wall runs, wherein there is provided in the alignment of the groove 7 a further projection 10 which is directed against the projection of the bridge 6.
  • a 90 ° position the slot 5 and the groove 7 are in the inside of the peripheral wall of the sleeve two further axially parallel grooves 11 and 12 are provided, which over the extend the full length of the sleeve 1.
  • each contact spring 13 and 14 which has a widened head at one free end 15 (see Figure 4), which is approximately 90 ° from the rest of the contact spring bent and with its end edge 16 against the longitudinal axis 17 of the Sleeve is directed.
  • the contact springs 13 and 14 protrude towards the head 15 increasingly over part of their length out of the grooves 11 and 12; in in the vicinity of the end 4 of the socket, the contact springs 13 and 14 into the grooves 11 and 12 and end there on a foot part 18, which the connects the two contact springs 13 and 14 in an electrically conductive manner.
  • the Foot part 18 is embedded in the plastic of the sleeve 1 and occurs in some places revealed, namely in the grooves 7, 11 and 12, which from the foot part 18th are crossed (see Figures 1 and 5) and at one end 4 of the sleeve provided, arranged in a recess 19 end surface of the sleeve which are two separation points 20 and 21 of webs 22 and 23, which connect the foot part to a side strip 24 of a band which is made of the contact spring material and holes 25 at regular intervals for a gradual tape feed.
  • the webs 22 are from this volume and 23, the foot part 18 and the two contact springs 13 and 14 by stamping and bending.
  • the foot part 18 also runs in the two grooves 11 and 12 and in partial areas adjacent to the grooves on both sides. In the transition areas between the webs 22 and 23 on the one hand and the grooves 11 and 12 on the other hand, the foot part is bent twice by 45 ° and on its ends beyond the grooves 11 and 12 again by 45 ° bent, in each case for approximate adaptation to the curvature of the sleeve 1.
  • the separation points 20 and 21 are designed as predetermined breaking points, so that after the injection of the sleeve 1, the finished short-circuit protection from the webs 22nd and 23 can be canceled.
  • Plug 28 with contact sockets 29 and 30 is intended in the direction of Arrow 2 to engage in the sleeve 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)

Claims (13)

  1. Dispositif de sécurité contre les courts-circuits pour des appareils d'allumage électriques de coussins pneumatiques de sécurité
    comprenant une douille (1) en matière synthétique dans laquelle deux ressorts de contact (13, 14) sont disposés à l'opposé l'un de l'autre et sont fixés avec une partie inférieure (18) qui leur est commune à la paroi périphérique de la douille (1), dans lequel les ressorts de contact (13, 14), à partir d'une position interne par rapport à l'axe longitudinal (17) de la douille (1) dans laquelle ils viennent s'appuyer de manière élastique contre deux connecteurs mâles (26, 27) d'un appareil d'allumage pour le coussin pneumatique de sécurité, faisant saillie dans la douille (1), peuvent être déviés vers l'extérieur à l'encontre de leur force de ressort,
    caractérisé en ce que la partie inférieure (18) a été recouverte par extrusion avec la matière synthétique et en ce qu'à une extrémité de la douille (1), à au moins un endroit, de préférence à deux endroits voisins (20, 21) de leur surface terminale qui s'y trouve, une ou de préférence deux traverses (22, 23) de la partie inférieure (18) à l'état détaché affleurent.
  2. Dispositif de sécurité contre les courts-circuits selon la revendication 1, caractérisé en ce que la douille (1) possède, sur son côté interne, deux rainures (11, 12) parallèles à l'axe, dans lesquelles viennent se loger les ressorts de contact (13, 14).
  3. Dispositif de sécurité contre les courts-circuits selon la revendication 1 ou 2, caractérisé en ce que les ressorts de contact (13, 14) sont pliés à leur extrémité libre pour former une partie supérieure (15) de telle sorte que la partie supérieure (15) est orientée avec son arête terminale (16) dans la direction de l'axe longitudinal (17) de la douille (1).
  4. Dispositif de sécurité contre les courts-circuits selon l'une quelconque des revendications précédentes, caractérisé en ce que les ressorts de contact (13, 14) possèdent une partie supérieure élargie (15).
  5. Dispositif de sécurité contre les courts-circuits selon l'une quelconque des revendications précédentes, caractérisé en ce que la partie inférieure (18) n'entoure que partiellement le passage ménagé dans la douille (1).
  6. Dispositif de sécurité contre les courts-circuits selon l'une quelconque des revendications précédentes, caractérisé en ce que la douille (1) possède, sur son côté externe et/ou sur son côté interne, au moins une rainure de guidage (7) ou une surface de guidage (2, 3) parallèle à l'axe ou encore une fente de guidage (5), et en ce que dans, respectivement sur une de ces dernières, la partie inférieure (18) des ressorts de contact (13, 14) est en partie mise à nu.
  7. Dispositif de sécurité contre les courts-circuits selon l'une quelconque des revendications précédentes, caractérisé en ce que les deux endroits (20, 21) sont disposés dans un évidement (19) pratiqués dans la surface terminale de la douille (1).
  8. Dispositif de sécurité contre les courts-circuits selon l'une quelconque des revendications précédentes, caractérisé en ce que les ressorts de contact (13, 14) sont constitués par un matériau destiné à la fabrication de ressorts de contact, soumis à une trempe à l'atelier, en particulier par du CuBe.
  9. Procédé pour la fabrication d'un dispositif de sécurité contre les courts-circuits selon l'une quelconque des revendications précédentes, caractérisé par les étapes ci-après:
    (a) en partant d'un ruban constitué par le matériau destiné à la fabrication de ressorts de contact, on forme, à partir de ce dernier, de manière successive et progressive, par emboutissage et pliage, respectivement deux ressorts de contact (13, 14) possédant une partie inférieure (18) qui leur est commune dans leur configuration définitive de telle sorte que les parties inférieures (18) restent dans un premier temps reliées d'un côté, respectivement via au moins une traverse (22, 23), avec une bande latérale (24) du ruban;
    (b) ensuite, on achemine les ressorts de contact (13, 14) en continu successivement à un moule et on y encastre leurs parties inférieures (18) par injection pour former les douilles (1);
    (c) ensuite, on isole les dispositifs de sécurité contre les courts-circuits en séparant les traverses (22, 23) sur la surface terminale (19) du manchon où elles affleurent par rapport à la matière synthétique.
  10. Procédé selon la revendication 9, caractérisé en ce qu'on forme, dans les traverses (22, 23), à l'étape (a), un point (20, 21) destiné à la rupture.
  11. Procédé selon la revendication 9 ou 10, caractérisé en ce qu'on enroule le ruban entre les étapes (a) et (b) et/ou entre les étapes (b) et (c).
  12. Procédé selon la revendication 9, 10 ou 11, caractérisé en ce qu'on forme deux traverses (22, 23) entre la bande latérale (24) du ruban et chaque partie inférieure (18).
  13. Procédé selon l'une quelconque des revendications 9 à 12, caractérisé en ce qu'on plie les traverses (22, 23) en formant un angle de 90°.
EP96106772A 1995-04-27 1996-04-29 Protection contre les court-circuits pour allumeurs électriques d'airbags Expired - Lifetime EP0740369B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19514864 1995-04-27
DE19514864A DE19514864A1 (de) 1995-04-27 1995-04-27 Kurzschlußsicherung für elektrische Zünder von Airbags

Publications (3)

Publication Number Publication Date
EP0740369A2 EP0740369A2 (fr) 1996-10-30
EP0740369A3 EP0740369A3 (fr) 1997-03-26
EP0740369B1 true EP0740369B1 (fr) 2000-01-05

Family

ID=7760130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96106772A Expired - Lifetime EP0740369B1 (fr) 1995-04-27 1996-04-29 Protection contre les court-circuits pour allumeurs électriques d'airbags

Country Status (2)

Country Link
EP (1) EP0740369B1 (fr)
DE (2) DE19514864A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19935969C2 (de) 1999-07-30 2001-12-13 Framatome Connectors Int Kurzschluß-Kontaktträger für Zündersockel
FR2807155B1 (fr) * 2000-03-30 2003-03-21 Giat Ind Sa Initiateur pyrotechnique pouvant etre equipe d'un composant electrique ou electronique et/ou d'un connecteur
EP1176384A3 (fr) 2000-07-27 2002-03-20 Giat Industries Initiateur pyrotechnique pouvant être équipé d'un composant éléctrique ou électronique et/ou d'un connecteur
US20040043652A1 (en) * 2002-08-30 2004-03-04 Special Devices, Inc. Initiator having integral features for orienting and holding an insertable electrical shunt
DE10243876A1 (de) * 2002-09-21 2004-04-01 Amphenol-Tuchel Electronics Gmbh Steckerteil
WO2010070391A1 (fr) * 2008-12-16 2010-06-24 Fci Bague de court-circuitage pour système d'amorçage de coussin de sécurité gonflable

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2633590C2 (de) * 1976-07-27 1984-09-27 Daimler-Benz Ag, 7000 Stuttgart Zündvorrichtung für ein passives Rückhaltesystem
DE2830552A1 (de) * 1978-07-12 1980-01-24 Daimler Benz Ag Kurzschlussicherung fuer elektrische zuender
DE3229899A1 (de) * 1982-08-11 1984-02-16 Siemens AG, 1000 Berlin und 8000 München Kunststoffumspritztes kontaktelement fuer die nachrichtentechnik, vorzugsweise kabelstecker
DE8531990U1 (de) * 1985-11-13 1986-01-16 C.A. Weidmüller GmbH & Co, 4930 Detmold Elektrischer Doppelsteckverbinder mit Kurzschlußbrücke
US4906203A (en) * 1988-10-24 1990-03-06 General Motors Corporation Electrical connector with shorting clip
US5275575A (en) * 1992-10-09 1994-01-04 Trw Inc. Electrical connection system with safety interlock
US5273448A (en) * 1993-03-16 1993-12-28 The Whitaker Corporation Shorting spring concept
US5274918A (en) * 1993-04-15 1994-01-04 The Whitaker Corporation Method for producing contact shorting bar insert for modular jack assembly
GB9316839D0 (en) * 1993-08-13 1993-09-29 Amp Gmbh Short circuit spring terminal
EP0650229A3 (fr) * 1993-10-22 1997-01-02 Amphenol Tuchel Elect Système de sécurité à sac gonflable.

Also Published As

Publication number Publication date
EP0740369A2 (fr) 1996-10-30
DE59604080D1 (de) 2000-02-10
EP0740369A3 (fr) 1997-03-26
DE19514864A1 (de) 1996-11-07

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