EP0447762B1 - Boucle de ceinture de sécurité pourvue d'un dispositif de tension - Google Patents

Boucle de ceinture de sécurité pourvue d'un dispositif de tension Download PDF

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Publication number
EP0447762B1
EP0447762B1 EP91101123A EP91101123A EP0447762B1 EP 0447762 B1 EP0447762 B1 EP 0447762B1 EP 91101123 A EP91101123 A EP 91101123A EP 91101123 A EP91101123 A EP 91101123A EP 0447762 B1 EP0447762 B1 EP 0447762B1
Authority
EP
European Patent Office
Prior art keywords
belt buckle
pawl
release button
locking pawl
housing
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
EP91101123A
Other languages
German (de)
English (en)
Other versions
EP0447762A1 (fr
Inventor
Artur Föhl
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.)
TRW Occupant Restraint Systems GmbH
Original Assignee
TRW Occupant Restraint Systems 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 TRW Occupant Restraint Systems GmbH filed Critical TRW Occupant Restraint Systems GmbH
Publication of EP0447762A1 publication Critical patent/EP0447762A1/fr
Application granted granted Critical
Publication of EP0447762B1 publication Critical patent/EP0447762B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B11/00—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
    • A44B11/25—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts
    • A44B11/2503—Safety buckles
    • A44B11/2507—Safety buckles actuated by a push-button
    • A44B11/2523—Safety buckles actuated by a push-button acting parallel to the main plane of the buckle and in the same direction as the fastening action
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/45—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock]
    • Y10T24/45225—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] including member having distinct formations and mating member selectively interlocking therewith
    • Y10T24/45602—Receiving member includes either movable connection between interlocking components or variable configuration cavity
    • Y10T24/45623—Receiving member includes either movable connection between interlocking components or variable configuration cavity and operator therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/45—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock]
    • Y10T24/45225—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] including member having distinct formations and mating member selectively interlocking therewith
    • Y10T24/45602—Receiving member includes either movable connection between interlocking components or variable configuration cavity
    • Y10T24/45623—Receiving member includes either movable connection between interlocking components or variable configuration cavity and operator therefor
    • Y10T24/4566—Receiving member includes either movable connection between interlocking components or variable configuration cavity and operator therefor including slidably connected and guided element on receiving member
    • Y10T24/45665—Receiving member includes either movable connection between interlocking components or variable configuration cavity and operator therefor including slidably connected and guided element on receiving member for shifting pivotally connected interlocking component

Definitions

  • the invention relates to a belt buckle for a seat belt system, which is provided with a back tensioning device which is effective between the belt buckle and an anchoring point on the vehicle body or on a vehicle seat.
  • Belt buckles for seat belt systems are known in numerous designs.
  • a design has proven itself in which a guideway for the tongue is formed in the housing of the buckle and a latch which is displaceably guided or pivotably mounted on the housing transversely to the guideway interacts with a latching opening of the tongue.
  • a locking member which is displaceably guided in the housing parallel to the guideway holds the bolt in its locking position, as long as a trigger button which is likewise displaceably guided in the housing parallel to the guideway is in their rest position.
  • the trigger button is coupled to the locking member to move this when actuated into a release position in which the bolt is released from the latching opening of the tongue.
  • the belt buckle housing contains a guide track for the tongue.
  • a bolt mounted on the housing interacts with a locking opening in the tongue.
  • a trigger button is displaceable parallel to the guideway in the housing, the actuation of which releases the latch from the latching opening of the tongue.
  • the release button has a certain idle stroke.
  • a pawl is also pivotally mounted on the housing of the buckle. This pawl is biased by a spring in a position in which it does not hinder the actuation stroke of the release button.
  • the center of gravity of the pawl is offset to such an extent perpendicular to the direction of displacement of the buckle in the backward movement relative to the pivot axis of the pawl that the pawl shifts in its direction of displacement in its direction of displacement, overcoming the spring pretension, under the effect of a predetermined threshold value, overcoming the spring preload in which it locks the release button on the housing. Since the pawl is connected to a lever which is oriented generally transversely to the direction of movement of the belt buckle during the back tensioning movement and has a considerable mass, it is difficult to accommodate it in existing buckle constructions. At very high belt tensioner accelerations, there is a risk of damage due to the high inertial forces that occur on the bearing of the lever.
  • the invention has for its object to develop a buckle of the type mentioned in that it can be used in seat belt systems that are equipped with back tensioning devices that generate relatively high back tensioning accelerations, and that it is not particularly suitable for its design, size and construction lock constructions provided for this purpose.
  • the invention is based on a belt buckle of the type described in EP-A-212 507 and solves the problem in that the pawl is mounted on the release button and cooperates with a locking edge on the housing, which acts in the direction of displacement of the buckle when the release button is not actuated is located at a distance from the pawl tip of the pawl, and that the pawl forms a one-armed lever which extends generally parallel to the direction of displacement of the buckle.
  • the pawl is held in its rest position by the pretensioning means, so that the release button can be operated without hindrance.
  • the buckle is moved towards its anchor point with high acceleration.
  • the release button now strives to perform a release stroke under the effect of its inertia. In doing so, it first performs an idle stroke, which is provided in all common lock designs, in order to prevent the belt buckle from being opened unintentionally.
  • the pawl is under the effect of the same delay Engagement position has been pivoted so that it prevents further movement of the release button in the same direction of actuation. It has been shown that such a pawl can be assigned to existing buckle constructions without changing the design, size and construction. It is therefore easily possible to retrofit them into existing constructions in order to make proven buckle designs suitable for use in restraint systems with a tightening device.
  • the back tensioning device shown in FIG. 1 consists of a pyrotechnic piston / cylinder back tensioning drive 10, the cylinder of which is anchored to the vehicle body, a longitudinal guide for the buckle 12 in the form of an elongated anchoring plate 16 provided with an elongated hole 14, and a pull cable 18 which holds the piston 20 connects to the fastening fitting 22 of the belt buckle, and a deflection roller 24, over which the traction cable 18 is guided and which is mounted on a fastening bolt 26, by means of which the anchoring plate 16 is fastened to the vehicle body.
  • Figures 1 and 2 show the back tensioning device in the non-activated state.
  • an end face of the Koblen 20 can be acted upon by compressed gases which are generated by a pyrotechnic gas generator 28.
  • the piston 20 under the action of the compressed gases, the piston 20 is driven with extremely high acceleration and pulls the buckle 12 downward via the pull rope 18 and the fastening fitting 22.
  • the movement of the buckle 12 is suddenly braked.
  • a backstop integrated in the piston 20 prevents the belt buckle 12 from being able to be displaced in the direction of its starting position after the back tightening has been carried out.
  • the anchoring fitting 22 is connected to the load-bearing part of the lock housing 32 by a rivet connection.
  • This housing 32 is surrounded by a cover in the form of a plastic shell 34.
  • the lock housing 32 is provided with a U-shaped, raised bearing bracket in plan view, between the two parallel legs 36, 38 of which a pivot bolt 40 is mounted by means of a bearing bolt 42.
  • the trigger button 30 has two parallel arms 30A, 30B which extend into the lock interior and which are provided at their free end with a guide slot through which the outer ends of the bearing bolt 42 pass. The trigger button 30 is slidably guided on the outer sides of the legs 36, 38.
  • the lock housing 32 is provided with a guide track 44 for a tongue 46 which has a latching opening 48.
  • a control cam 50 of the pivot bolt 40 projects into the guide track 44.
  • the pivot bolt 40 is also provided with a detent 52 in the region of its free end.
  • a locking member 54 in the form of a steel plate is attached above a shoulder 56 at the free end of the pivot bolt 40.
  • a compression spring 58 is supported with one end on the locking member 54 and the other end on a lever arm 60 of the pivot bolt 40, which is opposite the control cam 50.
  • the shoulder 56 of the pivot bolt 40 engages behind the front edge of the locking member 54, so that the detent 52 is pivoted out of the guide track 44 by the compression spring 58.
  • the trigger button 30 is shown in its actuated position.
  • a pawl 70 is pivotally mounted on the release button 30 on a bearing pin 72, the axis of which is oriented perpendicular to the guide track 44.
  • the pawl 70 is designed as a one-armed lever, at one end of the pawl is mounted and the other, free end forms the pawl tip 74.
  • This pawl tip 74 cooperates with a locking edge 76 at a rectangular opening 78 in the leg 38.
  • the pawl 70 is biased into its rest position out of engagement with the latching edge 76 by a spring 80 bent from spring wire. Since the pawl 70 is designed as a narrow, elongated lever which extends parallel to and in the immediate vicinity of the leg 38, it can easily be accommodated within the plastic shell 34 without changing its shape, in particular without increasing its dimensions.
  • Fig. 9 shows the orientation of the buckle and the pawl in normal use:
  • the longitudinal axis of the buckle which corresponds to its direction of displacement in the back tightening case, is inclined at an angle of, for example, about 35 ° to the vertical. Due to this arrangement, the pawl 70 is subjected to a gravity component, by means of which it is biased into its normal rest position. This bias in the rest position is further supported by the spring 80 (not shown in FIG. 9 for simplification).
  • the pretensioning of the pawl 70 in its rest position is achieved either solely by gravity or solely by spring pretensioning.
  • a pawl 70 acts Gravity component G, which engages with the lever arm X at the center of gravity S of the pawl.
  • the center of gravity S is offset by a dimension y in relation to the pivot axis of the pawl 70, designated A, perpendicular to the direction of displacement of the buckle in the case of back tension.
  • the pawl tip 74 is in its rest position at a distance d from the locking edge 76.
  • This distance d is dimensioned sufficiently large so that the pawl 70 has safely entered the opening 78 before the height of the Locking edge 76 reached.
  • this distance d is significantly smaller than the idle stroke L of the release button 30, also shown in FIG. 9, which ensures that the release button 30 is locked before the end of the idle stroke L is reached.
  • the predetermined threshold for the delay a, ab which the prestressing force is overcome is chosen to be relatively small.
  • a value of about -5 g is a suitable value, on the one hand to counteract the forces causing the actuation of the pawl 70 only slightly, but on the other hand to ensure that the pawl remains securely in its rest position in the normal operating state.
  • the strength of the spring 80 can be calculated according to the same criteria if it is to generate the preload alone or in cooperation with gravity.
  • the pawl 70 is pivotally mounted on the housing. With its pawl tip 74, it can be moved into the movement path of a rib 30a of the release button 30. Due to the gravity component acting on its center of gravity S with the lever arm X, the pawl 70 is held in its normal rest position, in which it does not hinder the release stroke of the key 30. In the back tension case, at the end of the back tension stroke, due to the high delays then occurring at the center of gravity S, an inertia force acts with the lever arm y, which causes the pawl 70 to pivot counterclockwise into the engaged position thereof. The same considerations apply to the dimensioning of the distance d and the dimensions y and X as for the embodiment according to FIG. 9.

Landscapes

  • Automotive Seat Belt Assembly (AREA)
  • Buckles (AREA)

Claims (5)

  1. Attache de ceinture d'un système de ceinture de sécurité équipé d'un dispositif de rétraction dont l'action s'exerce entre l'attache de ceinture (12) et un point de fixation (26) sur la carrosserie ou un siège du véhicule en déplaçant l'attache de ceinture (12) vers le point de fixation (26), ayant les particularités suivantes :
    - une glissière de guidage (44) de la languette d'enclenchement (46) est formée dans le boîtier (32) de l'attache de ceinture (12) ;
    - un verrou (40) monté sur le boîtier (32) coopère avec un trou d'encliquetage (48) de la languette d'enclenchement (46)
    - une touche de dégagement (30) guidée déplaçable dans le boîtier (32), parallèlement à la glissière de guidage (44), est prévue pour libérer le verrou (40) afin de dégager ce dernier du trou d'encliquetage (48) de la languette d'enclenchement (46) et une course à vide de cette touche est destinée à l'empêcher de se dégager accidentellement ;
    - la touche de dégagement (30) est blocable au moyen d'un cliquet d'arrêt (70) monté sur le boîtier afin de l'empêcher de se déplacer dans le sens de la manoeuvre ;
    - un moyen de précontrainte (G, 80) précontraint le cliquet d'arrêt (70) dans une position dans laquelle il n'empêche pas la course de manoeuvre de la touche de dégagement (30) ;
    - le cliquet d'arrêt (70) est monté oscillant ;
    - le centre de gravité (S) du cliquet d'arrêt (70) est décalé par rapport à l'axe d'oscillation (A) de ce dernier d'une cote telle (y), perpendiculairement à la direction de déplacement de l'attache de ceinture en cas de mouvement de rétraction, que l'effet d'une décélération de l'attache de ceinture dans le sens de son déplacement, lorsque cette décélération dépasse un seuil prédéterminé (a), déplace le cliquet d'arrêt, en surmontant le moyen de précontrainte (G, 80), pour le mettre à sa position d'engagement dans laquelle il bloque la touche de dégagement (30) dans le boîtier ;
    caractérisée en ce que le cliquet d'arrêt (70) est monté sur la touche de dégagement (30) et coopère avec une arrête d'encliquetage (76) montée sur le boîtier et qui, lorsque la touche de dégagement (30) n'est pas actionnée, est placée à distance de la pointe (74) du cliquet d'arrêt (70) dans le sens de déplacement de l'attache de ceinture et en ce que le cliquet d'arrêt (70) forme un levier simple qui s'étend de manière générale parallèlement à la direction de déplacement de l'attache de ceinture (12).
  2. Attache de ceinture selon la revendication 1, caractérisée en ce que le moyen de précontrainte (G) est formé au moins partiellement de la gravité agissant sur le cliquet d'arrêt.
  3. Attache de ceinture selon la revendication 1 ou 2, caractérisée en ce que le moyen de précontrainte est formé au moins partiellement d'un ressort (80).
  4. Attache de ceinture selon l'une des revendications précédentes, caractérisée en ce que le seuil prédéterminé (a) de la décélération et la course à vide (L) de la touche de dégagement (30) sont coordonnés de manière que sous l'effet de la décélération se produisant à la fin de la course de rétraction, le cliquet d'arrêt (70) soit déplacé pour être mis en position d'engagement avant que la touche de dégagement (30), sous l'effet de la même décélération et du fait de son inertie, n'ait atteint l'extrémité de sa course à vide (L).
  5. Attache de ceinture selon la revendication 4, caractérisée en ce que le seuil prédéterminé (a) est d'environ -5 g.
EP91101123A 1990-03-22 1991-01-29 Boucle de ceinture de sécurité pourvue d'un dispositif de tension Expired - Lifetime EP0447762B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4009272A DE4009272A1 (de) 1990-03-22 1990-03-22 Gurtschloss fuer ein sicherheitsgurtsystem, das mit einer rueckstrammeinrichtung versehen ist
DE4009272 1990-03-22

Publications (2)

Publication Number Publication Date
EP0447762A1 EP0447762A1 (fr) 1991-09-25
EP0447762B1 true EP0447762B1 (fr) 1994-07-20

Family

ID=6402845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101123A Expired - Lifetime EP0447762B1 (fr) 1990-03-22 1991-01-29 Boucle de ceinture de sécurité pourvue d'un dispositif de tension

Country Status (5)

Country Link
US (1) US5097571A (fr)
EP (1) EP0447762B1 (fr)
JP (1) JPH0624484B2 (fr)
DE (2) DE4009272A1 (fr)
ES (1) ES2029220T3 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59009070D1 (de) * 1990-11-15 1995-06-14 Trw Repa Gmbh Schloss für Sicherheitsgurtsysteme in Fahrzeugen.
DE4215563A1 (de) * 1992-05-12 1993-11-18 Trw Repa Gmbh Schloß für Fahrzeug-Sicherheitsgurtsysteme
JP2587877Y2 (ja) * 1992-05-26 1998-12-24 日本精工株式会社 シートベルト用バックル装置
JP3135685B2 (ja) * 1992-06-16 2001-02-19 タカタ株式会社 シートベルト装置のバックルプリテンショナ
DE4221398A1 (de) * 1992-06-30 1994-01-05 Takata Europ Gmbh Verfahren zum Fixieren der Entriegelungstaste bzw. des Verriegelungsmechanismus eines Sicherheitsgurtschlosses bei Fahrzeugen und Sicherheitsgurtanordnung zur Ausführung dieses Verfahrens
DE4416138C2 (de) * 1994-05-06 2002-06-13 Trw Repa Gmbh Verschluß für Sicherheitsgurte
DE4427011A1 (de) * 1994-07-29 1996-02-01 Trw Repa Gmbh Verschluß für Sicherheitsgurte
US5496068A (en) * 1995-01-20 1996-03-05 Trw Vehicle Safety Systems Inc. Inertia sensitive buckle for seat belt pretensioner system
US5522619A (en) * 1995-02-01 1996-06-04 Alliedsignal Inc. End release seat belt buckle having an inertia-sensitive locking mechanism
US5742987A (en) * 1996-09-11 1998-04-28 Alliedsignal Inc. Buckle for use with a pretensioner
US6363591B1 (en) * 1997-08-04 2002-04-02 Breed Automotive Technology, Inc. Safety belt buckle
EP1077037B1 (fr) * 1999-08-17 2004-10-27 Delphi Automotive Systems Sungwoo Co., Ltd. Boucle de ceinture de sécurité
EP1396398B1 (fr) * 2002-09-04 2006-06-21 TAKATA-PETRI (Ulm) GmbH Prétensionneur de boucle de ceinture de sécurité
US7370393B2 (en) * 2004-09-20 2008-05-13 Delphi Technologies, Inc. Seat belt buckle for use with pretensioner
WO2006127375A1 (fr) 2005-05-26 2006-11-30 Delphi Technologies, Inc. Boucle de ceinture de securite utilisee avec un pretensionneur
JP5688256B2 (ja) * 2009-10-28 2015-03-25 芦森工業株式会社 バックル装置
JP2014028601A (ja) * 2012-07-31 2014-02-13 Takata Corp ラッププリテンショナ装置及びそれを備えるシートベルト装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2223061A1 (de) * 1972-05-12 1973-11-22 Volkswagenwerk Ag Spanneinrichtung fuer rueckhalteeinrichtungen
FR2412283A1 (fr) * 1977-12-21 1979-07-20 Boudot Georges Boucle pour ceinture de securite
SE448595B (sv) * 1985-08-02 1987-03-09 Autoliv Dev Lasmekanism for bilbelte med tva separata sperrelement
DE3533684A1 (de) * 1985-08-17 1987-02-26 Autoflug Gmbh Sicherheitsgurtverschluss
GB2202264B (en) * 1987-02-10 1991-04-24 Autoliv Dev Improvements in or relating to a safety belt buckle
DE3729505A1 (de) * 1987-09-03 1989-03-23 Bsrd Ltd Vorrichtung zum straffen eines sicherheitsgurtes eines fahrzeugs, insbesondere kraftfahrzeugs
DE3811429C2 (de) * 1988-04-05 1996-05-09 Gen Engineering Bv Sicherheitsgurtverschluß mit zweigeteilter Auslösetaste
DE3833483A1 (de) * 1988-10-01 1990-04-05 Autoflug Gmbh Gurtschloss mit massenausgleich
US5163207A (en) * 1989-03-15 1992-11-17 Autoflug Gmbh & Co. Fahrzeugtechnik Shock proof buckle for safety belts

Also Published As

Publication number Publication date
US5097571A (en) 1992-03-24
JPH04221503A (ja) 1992-08-12
EP0447762A1 (fr) 1991-09-25
DE59102209D1 (de) 1994-08-25
JPH0624484B2 (ja) 1994-04-06
ES2029220T1 (es) 1992-08-01
DE4009272A1 (de) 1991-09-26
ES2029220T3 (es) 1994-12-01

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