WO1998002058A1 - Boucle - Google Patents

Boucle Download PDF

Info

Publication number
WO1998002058A1
WO1998002058A1 PCT/GB1997/001871 GB9701871W WO9802058A1 WO 1998002058 A1 WO1998002058 A1 WO 1998002058A1 GB 9701871 W GB9701871 W GB 9701871W WO 9802058 A1 WO9802058 A1 WO 9802058A1
Authority
WO
WIPO (PCT)
Prior art keywords
buckle
inertial
actuating member
tongue
buckle according
Prior art date
Application number
PCT/GB1997/001871
Other languages
English (en)
Inventor
David Burke
Alan George Smithson
Ian Alexander Gordon
Original Assignee
Breed Automotive Technology, Inc.
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 Breed Automotive Technology, Inc. filed Critical Breed Automotive Technology, Inc.
Priority to EP97930679A priority Critical patent/EP0912122A1/fr
Publication of WO1998002058A1 publication Critical patent/WO1998002058A1/fr

Links

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

Definitions

  • the present invention relates to a buckle for a vehicle safety restraint and particularly to a pretensioner-proof buckle .
  • pretensioner-proof buckles Some arrangements to pretensioner-proof buckles are known, for example from EP C 212 507 and EP 0 415 418, and US 5 115 543.
  • a buckle for a vehicle safety restraint comprising a frame defining a passageway for receiving a tongue to be attached to the buckle, a latching member for engaging the tongue, the latching member being moveable between a tongue engaging position and a tongue disengaging position under action of a manually operable actuating member, an inertial member rotatably mounted substantially about its centre of gravity on the frame, the inertial member having an intermeshing means for co-operating with means on the actuating member for holding the actuating member against movement under high acceleration forces, the holding means being inoperative on low acceleration manual actuation of the actuating member.
  • the holding means comprises a pawl on the inertial member and a co-operating recess on the actuating member, the pawl being fixed to the inertial member and coaxially rotatable therewith between a holding position in which the pawl engages the recess in the actuating member and a position in which the pawl is released from the recess so that the actuating member is not held and is free to move.
  • the inertial member comprises a flywheel disc
  • the pawl is mounted to the rotation axis of the disc and a resilient turning bias is provided by a coil spring with one end mounted to the disc at a point spaced from its centre, and the other end mounted to the frame.
  • the flywheel is preferably mounted in the plane of the buckle .
  • the inertial member may be a rotational roller mass lying across the width of the buckle.
  • the roller mass may hold the actuating member by co-operating teeth on both parts.
  • the invention uses the property of a flywheel which enables it to be easily rotated it it is moving at a slow speed, but is very hard to rotate if it is moving at high speed, i.e. it requires a small force to move it at low acceleration rates but requires a very high force at high acceleration rates.
  • the force required to displace the actuating member (which is the buckle button) is proportional to the acceleration which the button experiences .
  • Figure 1 is a schematic perspective view of a first embodiment of the present invention.
  • FIGS 2 and 3 are schematic plan views in more detail of part of the embodiment of Figure 1.
  • Figure 4 is a schematic perspective view of a second embodiment of the present invention.
  • Figure 5 is a schematic perspective view of part of Figure .
  • Figure 6 is a graph of a typical pretensioning pulse.
  • the first embodiment shown in Figures 1 to 3 uses a pawl and slot blocking feature.
  • the second embodiment shown in Figures 4 and 5 uses a rack and pinion arrangement.
  • an actuating member or buckle button 1 is shown with rearwardly extending side arms 2 for engaging in the buckle frame or housing (not shown) to guide the button for longitudinal movement, under manual pressure, to release the buckle fastening.
  • a third arm 3 extends rearwardly from the middle of the button.
  • a flywheel 4 is mounted at its centre on a pin 5 attached to the buckle housing or frame.
  • An off-centre pawl or cam 6 is connected to the pin 5 and sits in a notch 7 in the middle arm 3 on the button 1.
  • FIGS 2 and 3 show part of the button 1, together with the button arm 3 and the flywheel 4.
  • FIG 2 illustrates the normal button condition, i.e. extended, when the buckle is locked.
  • the cam 6 sits in notch or slot 7.
  • a stop 8 for the cam 6 is provided on the frame.
  • a spring 9 connects a point 10 on the frame to the cam 6 via rear cam extension 11. This provides a turning torque on the cam 6 and the flywheel 4, about the centre 12 of the flywheel.
  • Figure 3 the arrangement of parts during buckle opening is shown and like parts are denoted by like reference numerals .
  • the button 1 is manually depressed to the right in the direction of arrow A, thus pushing notch 7 past the cam 6 and rotating the cam and thus the flywheel 4 in an anticlockwise direction against the bias of spring 9. Depression of the button 1 releases the buckle fastening in known manner and subsequently a return spring (not shown) returns the button to the extended position shown in Figure 2.
  • G is equivalent to a force of about 590 N.
  • the inertia of the f lywheel is given by :
  • Figure 4 shows an embodiment with gear teeth 20 on the rear arms 21 of button 1 co-operating with toothed ends of a central spindle 22 of a roller 23, formed of a cylindrical mass.
  • This roller 23 acts in a similar manner to the flywheel of Figures 1 to 3.
  • the roller 23 may comprise a single cylindrical mass as shown in Figure 4 or alternatively comprise two masses spaced along the length of the spindle 22, as shown in Figure 5.
  • the acceleration curve then typically bottoms out and then the pulse reverses as the button decelerates when the pretensioning stops. This is shown in Figure 6.

Landscapes

  • Automotive Seat Belt Assembly (AREA)

Abstract

L'invention porte sur une boucle d'un dispositif protecteur de soutien pour véhicule. La boucle comprend un cadre délimitant un passage prévu pour accueillir une languette qui se fixe à la boucle, un mécanisme de verrouillage qui entre en contact avec la languette et peut être déplacée entre une position de prise avec la languette et une position de désolidarisation de la languette sous l'action d'un mécanisme de manoeuvre à commande manuelle. La boucle comprend aussi un élément à inertie tournant monté sensiblement autour de son centre de gravité sur le cadre et ayant un moyen engrenant solidaire d'un moyen situé sur le mécanisme de manoeuvre pour retenir le mécanisme de manoeuvre et l'empêcher de bouger lorsqu'il est soumis à des forces d'accélération élevées. Le moyen de retenu est inopérant lorsque le mécanisme de manoeuvre est déclenché manuellement en faible accélération. Un volant d'inertie a des qualités qui lui permettent de pivoter facilement à vitesses lentes, mais très difficilement lorsqu'il se déplace à haute vitesse. Ainsi, la force nécessaire pour déplacer le mécanisme de manoeuvre (qui est le bouton de la boucle) est proportionnelle à l'accélération à laquelle le bouton est soumis.
PCT/GB1997/001871 1996-07-11 1997-07-11 Boucle WO1998002058A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97930679A EP0912122A1 (fr) 1996-07-11 1997-07-11 Boucle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9614623.8 1996-07-11
GBGB9614623.8A GB9614623D0 (en) 1996-07-11 1996-07-11 Buckle

Publications (1)

Publication Number Publication Date
WO1998002058A1 true WO1998002058A1 (fr) 1998-01-22

Family

ID=10796772

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/001871 WO1998002058A1 (fr) 1996-07-11 1997-07-11 Boucle

Country Status (3)

Country Link
EP (1) EP0912122A1 (fr)
GB (2) GB9614623D0 (fr)
WO (1) WO1998002058A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20010538U1 (de) * 2000-06-14 2000-10-26 Trw Repa Gmbh Gurtschloß mit Trägheitsscheibe
ATE339905T1 (de) 2001-09-21 2006-10-15 Belt & Buckle S R L Gurtschnalle für sicherheitsgurt mit drei zungen, insbesondere für kindersitze in kraftfahrzuege und dergleichen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0212507A2 (fr) * 1985-08-17 1987-03-04 Autoflug Gmbh & Co Fahrzeugtechnik Boucle de verrouillage pour ceinture de sécurité
US4972559A (en) * 1987-02-10 1990-11-27 General Engineering (Netherlands) B.V. Safety belt buckle
EP0415418A2 (fr) * 1989-09-01 1991-03-06 TRW Occupant Restraint Systems GmbH Boucle pour un système de ceinture de sécurité avec dispositif tendeur
US5115543A (en) * 1990-12-11 1992-05-26 Trw Repa Gmbh Buckle for safety belt systems in vehicles
US5142749A (en) * 1991-03-22 1992-09-01 Trw Repa Gmbh Buckle for vehicle safety belts
US5373612A (en) * 1992-02-19 1994-12-20 Takata Corporation Buckle device in seat belt apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0212507A2 (fr) * 1985-08-17 1987-03-04 Autoflug Gmbh & Co Fahrzeugtechnik Boucle de verrouillage pour ceinture de sécurité
US4972559A (en) * 1987-02-10 1990-11-27 General Engineering (Netherlands) B.V. Safety belt buckle
EP0415418A2 (fr) * 1989-09-01 1991-03-06 TRW Occupant Restraint Systems GmbH Boucle pour un système de ceinture de sécurité avec dispositif tendeur
US5115543A (en) * 1990-12-11 1992-05-26 Trw Repa Gmbh Buckle for safety belt systems in vehicles
US5142749A (en) * 1991-03-22 1992-09-01 Trw Repa Gmbh Buckle for vehicle safety belts
US5373612A (en) * 1992-02-19 1994-12-20 Takata Corporation Buckle device in seat belt apparatus

Also Published As

Publication number Publication date
EP0912122A1 (fr) 1999-05-06
GB2315294B (en) 2000-10-25
GB9714713D0 (en) 1997-09-17
GB2315294A (en) 1998-01-28
GB9614623D0 (en) 1996-09-04

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