EP0452464A1 - Seat belt buckle. - Google Patents

Seat belt buckle.

Info

Publication number
EP0452464A1
EP0452464A1 EP19900916769 EP90916769A EP0452464A1 EP 0452464 A1 EP0452464 A1 EP 0452464A1 EP 19900916769 EP19900916769 EP 19900916769 EP 90916769 A EP90916769 A EP 90916769A EP 0452464 A1 EP0452464 A1 EP 0452464A1
Authority
EP
European Patent Office
Prior art keywords
locking member
bar
opening
frame
latch plate
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.)
Granted
Application number
EP19900916769
Other languages
German (de)
French (fr)
Other versions
EP0452464B1 (en
Inventor
Ron Clarke
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.)
European Components Co Ltd
Original Assignee
European Components Corp
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 European Components Corp filed Critical European Components Corp
Publication of EP0452464A1 publication Critical patent/EP0452464A1/en
Application granted granted Critical
Publication of EP0452464B1 publication Critical patent/EP0452464B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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 seat belt buckles for seat belts in motor vehicles.
  • One form of such seat belt buckle involves a latch plate having an aperture therein, engageable on one part of the seat belt, and a buckle having a rigid frame including a base having an opening therein and upstanding side walls adapted to guide the latch plate longitudinally of the frame .
  • the latch plate can be inserted against the action of a spring loaded ejector and when in the fully inserted position a locking member is pivoted to a lower latching position in which a locking element engages in the aperture in the latch plate.
  • a push button is used to release the locking member which pivots back to an unlatched position.
  • seat belt buckles should have an easy and effective latching of the latch plate and should easily release the latch plate by operation of the push button. It is most important to retain the latch plate in a latch position in the buckle even when the latch plate and buckle are subject to a very heavy impact load.
  • a seat belt buckle adapted to releasably engage a latch plate having an aperture therein
  • said buckle comprising a rigid frame including a base having an opening therein, upstanding side walls adapted to guide the latch plate longitudinally of the frame, a bar extending transversely of the frame between said side walls, said bar being spaced above the base, a locking member pivotally mounted on the frame and pivotal between a lower latched position and an upper unlatched position, said locking member carrying a downwardly projecting locking element engageable in said aperture in the latch plate to retain the latch plate in place and passing into said opening, a slider slidable longitudinally of the locking member between a first position in which it is located under said bar, to retain the locking member in the lower latched position and a second position in which it is resiliently engaged against the rear of the bar to retain the locking member in its upper unlatched position, a push button to push the slider from its first position to its second position, a slider spring to
  • each stop member extends laterally from the locking member forwardly from the wings and may comprise a pair of arms engaging, at least in the lower latching position of the locking member, against abutments in the side walls. In a simple construction these abutments are in the form of open-topped notches in the upper edges of the side walls into which the arms move in the lower latching position.
  • the locking element in the lower latching position of the locking member has its forward edge spaced from the forward edge of said opening by a given distance under normal conditions.
  • said at least one stop member has its forward edge spaced from its associated abutment by a spacing less than said given distance, whereby the load bearing capacity of the or each stop member and its associated abutment are enhanced by engagement of the forward edge of the locking element with the rearward edge of the opening.
  • the rearward edge of said bar and the forward edge of said slider are cooperatingly chamfered to retain the locking member in its upper unlatched position when said forward and rearward edges are inter-engaged by said slider spring.
  • Figure 1 is a side elevation of one embodiment of buckle according to the invention shown in the latched position;
  • Figure 2 is a similar view in section in the unlatched position;
  • Figure 3 is a plan view, half in section, of the buckle illustrated in Figures 1 and 2.
  • the buckle includes a rigid frame 10 having a base plate 12 having two upstanding side walls 14 extending from each side edge thereof.
  • a bar 16 extends between the side walls 14 and is spaced from and parallel to the base plate 12.
  • An opening 20 is formed in the base plate 12 and is provided with a front edge 22 ( Figure 2) .
  • a locking member 24 Pivotally mounted between the side walls 14 is a locking member 24, which includes a forwardly extending body 26 and downwardly extending legs 28.
  • the body is provided with two laterally extending wings 30 engaging in rear notches 32 in the side walls 14. Extending parallel to these wings 30 are arms 34 which can, in the lower latched position as illustrated in Figure 1, engage in forward notches 36 in the side wall.
  • a locking element 38 At the forward end of the body 26 of the locking member is a locking element 38 which, in the latched position, passes through an aperture 40 in a latch plate 42 to retain the latch plate in place.
  • longitudinally slidable on the locking member 24 is a slider 44 having a chamfered leading edge 46. The slider is urged towards the front (the left in the Figures) by a slider spring 48 engaged over a projection 50 on the body 26 of the locking member 24.
  • a push button 52 Longitudinally slidable on the side walls 14 is a push button 52 which has rearward projections 54 engaging forward projections 56 on an ejector 58 longitudinally slidable in the opening 20 in the base plate 12, and urged to the forward position by an ejector spring 60.
  • a latch plate 42 In use, starting from the position illustrated in Figure 2, a latch plate 42 is inserted in the guide channel formed by the base plate 12 and the side walls 14, it causes the ejector 58 to move rearwardly, that is to the right, against the action of its spring 60. This movement continues until the ejector is moved so far rearwards that it engages on the bottom of the leg 28 of the locking member 24. The resulting couple rotates the locking member/slider system causing the slider 44 to move down and return under the bar 16 to the position illustrated in Figure 1. When the plate 42 is unloaded, the aperture 40 therein abuts the locking element 38 which retains the latch plate 42 in place so that the buckle cannot unlatch.
  • both the wings and the main body of the locking member recover elastically to restore the clearances 64, 66 ( Figure 3) between the locking member 34 and the frame sufficient to allow the front face 70 of the locking element 38 to sweep past the frame edge 22, when the locking member is released to the unlatched position and in particular with the release preformed whilst specific test loads are being applied longitudinally through the latch plate.

Landscapes

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

Abstract

On décrit une boucle de ceinture de siège adaptée à s'engager de manière amovible dans une plaque d'attache (42) dotée d'une ouverture (40), ladite boucle étant munie d'un cadre rigide (10) et d'une base (12) à ouverture (40), de parois verticales (14) destinées à guider ladite plaque le long du cadre, d'une barrette (16) s'étendant transversalement par rapport au cadre entre lesdites parois, la barrette étant disposée au-dessus de la base, d'un élément de blocage (24) monté de manière pivotante sur le cadre, et pouvant pivoter entre une position inférieure enclenchée et une position supérieure non enclenchée, ledit élément de blocage portant une pièce de blocage (38) orientée vers le bas pouvant s'introduire dans ladite ouverture (40) de la plaque d'attache (42) pour la maintenir en place, et pouvant pénétrer dans ladite ouverture. La boucle comporte également un élément coulissant (44) pouvant glisser le long de l'élément de blocage entre une première position dans laquelle il est situé au-dessous de ladite barrette (16) pour retenir l'élément de blocage dans la position enclenchée inférieure et une deuxième position dans laquelle il est enclenché de manière élastique contre l'arrière de la barrette pour maintenir l'élément de blocage dans sa position supérieure non enclenchée, un bouton poussoir (52) pour pousser l'élément coulissant depuis sa première position vers sa deuxième position, un ressort (48) pour amener l'élément coulissant vers sa première position, une paire d'éléments latéraux (30) s'étendant latéralement en partant dudit élément de blocage et s'engageant dans les parois de manière à maintenir l'élément de blocage de manière pivotante et élastique pour permettre un mouvement entre ses positions supérieure et inférieure, et au moins une butée prenant appui sur des parties fixes du cadre rigide de manière à prévenir toute flexion desdites parties latérales au-dessus de leur limite élastique.We describe a seat belt buckle adapted to removably engage in a fastening plate (42) provided with an opening (40), said buckle being provided with a rigid frame (10) and with a base (12) with opening (40), of vertical walls (14) intended to guide said plate along the frame, of a bar (16) extending transversely relative to the frame between said walls, the bar being arranged at above the base, a blocking element (24) pivotally mounted on the frame, and which can pivot between a lower engaged position and an upper position not engaged, said blocking element carrying a blocking part (38) oriented downwards which can be introduced into said opening (40) of the attachment plate (42) to hold it in place, and which can penetrate into said opening. The loop also has a sliding element (44) which can slide along the blocking element between a first position in which it is located below said bar (16) to retain the blocking element in the lower engaged position. and a second position in which it is engaged elastically against the rear of the bar to keep the locking element in its upper position not engaged, a push button (52) for pushing the sliding element from its first position towards its second position, a spring (48) for bringing the sliding element to its first position, a pair of lateral elements (30) extending laterally from said blocking element and engaging in the walls so as to maintain the locking element pivotally and resiliently to allow movement between its upper and lower positions, and at least one stop bearing on fixed parts of the rigid frame of so as to prevent any bending of said lateral parts above their elastic limit.

Description

SEAT BELT BUCKLE
The present invention relates to seat belt buckles for seat belts in motor vehicles. One form of such seat belt buckle involves a latch plate having an aperture therein, engageable on one part of the seat belt, and a buckle having a rigid frame including a base having an opening therein and upstanding side walls adapted to guide the latch plate longitudinally of the frame .
The latch plate can be inserted against the action of a spring loaded ejector and when in the fully inserted position a locking member is pivoted to a lower latching position in which a locking element engages in the aperture in the latch plate. A push button is used to release the locking member which pivots back to an unlatched position.
It is important that such seat belt buckles should have an easy and effective latching of the latch plate and should easily release the latch plate by operation of the push button. It is most important to retain the latch plate in a latch position in the buckle even when the latch plate and buckle are subject to a very heavy impact load.
It is now proposed, according to the present invention, to provide a seat belt buckle adapted to releasably engage a latch plate having an aperture therein, said buckle comprising a rigid frame including a base having an opening therein, upstanding side walls adapted to guide the latch plate longitudinally of the frame, a bar extending transversely of the frame between said side walls, said bar being spaced above the base, a locking member pivotally mounted on the frame and pivotal between a lower latched position and an upper unlatched position, said locking member carrying a downwardly projecting locking element engageable in said aperture in the latch plate to retain the latch plate in place and passing into said opening, a slider slidable longitudinally of the locking member between a first position in which it is located under said bar, to retain the locking member in the lower latched position and a second position in which it is resiliently engaged against the rear of the bar to retain the locking member in its upper unlatched position, a push button to push the slider from its first position to its second position, a slider spring to urge the slider towards its first position, a pair of wings extending laterally from said locking member and engaging in said side walls to pivotally and resiliently mount the locking member for movement between its upper and lower positions said wings being capable of elastic flexing, upon axial loading of said locking member by said latch plate, and at least one stop member extending laterally from said member, said at least one stop member engaging abutments on said rigid frame to prevent flexing of said wings beyond their elastic limit.
The provision of the bar extending over the slider assists in the withstanding of heavy loads and prevents inadvertent release of the buckle. More importantly, however, the provision of the stop member or members prevents excessive flexing of the wings, which acts as the pivot for the locking member, so that the wings never are distorted beyond their elastic limit. The stop member may take a number of forms but advantageously each stop member extends laterally from the locking member forwardly from the wings and may comprise a pair of arms engaging, at least in the lower latching position of the locking member, against abutments in the side walls. In a simple construction these abutments are in the form of open-topped notches in the upper edges of the side walls into which the arms move in the lower latching position.
Preferably the locking element in the lower latching position of the locking member, has its forward edge spaced from the forward edge of said opening by a given distance under normal conditions. Desirably said at least one stop member has its forward edge spaced from its associated abutment by a spacing less than said given distance, whereby the load bearing capacity of the or each stop member and its associated abutment are enhanced by engagement of the forward edge of the locking element with the rearward edge of the opening. Advantageously the rearward edge of said bar and the forward edge of said slider are cooperatingly chamfered to retain the locking member in its upper unlatched position when said forward and rearward edges are inter-engaged by said slider spring.
In order that the present invention may more readily be understood, the following description is given, merely by way of example, reference being made to the accompanying drawings in which:-
Figure 1 is a side elevation of one embodiment of buckle according to the invention shown in the latched position; Figure 2 is a similar view in section in the unlatched position; and
Figure 3 is a plan view, half in section, of the buckle illustrated in Figures 1 and 2.
Referring first to Figure 1 the buckle includes a rigid frame 10 having a base plate 12 having two upstanding side walls 14 extending from each side edge thereof. A bar 16 extends between the side walls 14 and is spaced from and parallel to the base plate 12. An opening 20 is formed in the base plate 12 and is provided with a front edge 22 (Figure 2) .
Pivotally mounted between the side walls 14 is a locking member 24, which includes a forwardly extending body 26 and downwardly extending legs 28. The body is provided with two laterally extending wings 30 engaging in rear notches 32 in the side walls 14. Extending parallel to these wings 30 are arms 34 which can, in the lower latched position as illustrated in Figure 1, engage in forward notches 36 in the side wall.
At the forward end of the body 26 of the locking member is a locking element 38 which, in the latched position, passes through an aperture 40 in a latch plate 42 to retain the latch plate in place. It will be noted that longitudinally slidable on the locking member 24 is a slider 44 having a chamfered leading edge 46. The slider is urged towards the front (the left in the Figures) by a slider spring 48 engaged over a projection 50 on the body 26 of the locking member 24.
Longitudinally slidable on the side walls 14 is a push button 52 which has rearward projections 54 engaging forward projections 56 on an ejector 58 longitudinally slidable in the opening 20 in the base plate 12, and urged to the forward position by an ejector spring 60.
In use, starting from the position illustrated in Figure 2, a latch plate 42 is inserted in the guide channel formed by the base plate 12 and the side walls 14, it causes the ejector 58 to move rearwardly, that is to the right, against the action of its spring 60. This movement continues until the ejector is moved so far rearwards that it engages on the bottom of the leg 28 of the locking member 24. The resulting couple rotates the locking member/slider system causing the slider 44 to move down and return under the bar 16 to the position illustrated in Figure 1. When the plate 42 is unloaded, the aperture 40 therein abuts the locking element 38 which retains the latch plate 42 in place so that the buckle cannot unlatch.
In this condition, if an accident or the like occurs, and a very great strain is put on the buckle, then the latch plate 42 will be urged forward and will move with it the locking element 38, thereby closing the gap 64 illustrated in Figure 2, so that the front face of the locking element 38 abuts the front face 22 of the aperture 20. During this movement, the wings 30 will flex rearwards but the arms 34 engaging the front of the notches 36 will prevent anything more than a limited flexing so that the wings are not stressed beyond their elastic limit.
With the reduction of load (after impact) both the wings and the main body of the locking member recover elastically to restore the clearances 64, 66 (Figure 3) between the locking member 34 and the frame sufficient to allow the front face 70 of the locking element 38 to sweep past the frame edge 22, when the locking member is released to the unlatched position and in particular with the release preformed whilst specific test loads are being applied longitudinally through the latch plate.

Claims

1. A seat belt buckle adapted to releasably engage a latch plate having an aperture therein, said buckle comprising a rigid frame including a base having an opening therein, upstanding side walls adapted to guide the latch plate longitudinally of the frame, a bar extending transversely of the frame between said side walls, said bar being spaced above the base, a locking member pivotally mounted on the frame and pivotal between a lower latched position and an upper unlatched position, said locking member carrying a downwardly projecting locking element engageable in said aperture in the latch plate to retain the latch plate in place and passing into said opening, a slider slidable longitudinally of the locking member between a first position in which it is located under said bar, to retain the locking member in the lower latched position and a second position in which it is resiliently engaged against the rear of the bar to retain the locking member in its upper unlatched position, a push button to push the slider from its first position to its second position, a slider spring to urge the slider towards its first position, a pair of wings extending laterally from said locking member and engaging in said side walls to pivotally and resiliently mount the locking member for movement between its upper and lower positions said wings being capable of elastic flexing, upon axial loading of said locking member by said latch plate, and at least one stop member extending laterally from said member, said at least one stop member engaging abutments on said rigid frame to prevent flexing of said wings beyond their elas_ic limit.
2. A buckle according to claim 1, wherein said at least one stop member extends laterally from said latching member forwardly of said wings.
3. A buckle according to claim 2, wherein said at least one stop member comprises a pair of arms engaging, at least in the lower position of the latching member, against abutments in said side walls.
4. A buckle according to claim 3, wherein said abutments are in a form of notches in the upper edges of said side walls.
5. A buckle according to any preceding claim, wherein the locking element, in the lower latching position of the locking member, has its forward edge spaced from the rearward edge of said opening by a given distance under normal conditions.
6. A buckle according to claim 5, wherein said at least one stop member has its forward edge spaced from its associated abutment by a spacing less than said given distance, whereby the load bearing capacity of the or each stop member and its associated abutment are enhanced by engagement of the forward edge of the locking element with the rearward edge of the opening.
7. A buckle according to any preceding claim, wherein the rearward edge of said bar and the forward edge of said slider are cooperatingly chamfered to retain the locking member in its upper unlatched position when said forward and rearward edges are inter-engaged by said slider spring.
EP19900916769 1989-11-06 1990-11-02 Seat belt buckle Expired - Lifetime EP0452464B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8925036A GB2238074A (en) 1989-11-06 1989-11-06 Seat belt buckle.
GB8925036 1989-11-06

Publications (2)

Publication Number Publication Date
EP0452464A1 true EP0452464A1 (en) 1991-10-23
EP0452464B1 EP0452464B1 (en) 1994-02-16

Family

ID=10665816

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900916769 Expired - Lifetime EP0452464B1 (en) 1989-11-06 1990-11-02 Seat belt buckle

Country Status (6)

Country Link
EP (1) EP0452464B1 (en)
JP (1) JPH07112443B2 (en)
DE (1) DE69006720T2 (en)
ES (1) ES2051523T3 (en)
GB (1) GB2238074A (en)
WO (1) WO1991006231A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5718020A (en) * 1995-06-28 1998-02-17 European Components Co. Limited Seat belt buckle

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU1837825C (en) * 1991-04-03 1993-08-30 Леонид Оскарович Тедер Fastener for vehicle safety belt
GB2313147B (en) * 1996-05-14 2000-08-23 Europ Component Co Ltd Seat belt buckle
GB2317916A (en) * 1996-10-07 1998-04-08 Europ Component Co Ltd Seat belt buckle
GB2329214A (en) * 1997-09-10 1999-03-17 Europ Component Co Ltd Seat belt buckle

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2379995A2 (en) * 1976-04-28 1978-09-08 Peugeot Aciers Et Outillage BUCKLE FOR SAFETY STRAP
US4064603A (en) * 1976-09-29 1977-12-27 Gateway Industries, Inc. Safety belt buckle
SE7812170L (en) * 1977-12-07 1979-06-08 Klippan Nv BELT LOCK WITH EASY RELEASE LOCK
ATE8566T1 (en) * 1980-11-18 1984-08-15 Autoflug Gmbh BUCKLE FOR A SEAT BELT.
FR2509969A1 (en) * 1981-07-27 1983-01-28 Klippan Nv PIVOTING LATCH SEAT BELT CLOSING LOOP
SE451231B (en) * 1982-12-23 1987-09-21 Autoliv Dev WELDING DEVICE FOR SAFETY SEALS IN VEHICLES
US4550474A (en) * 1983-11-21 1985-11-05 Gateway Industries, Inc. Safety belt buckle
GB2218458B (en) * 1988-05-11 1992-04-15 Gen Motors Corp Seat belt buckle
GB2218457B (en) * 1988-05-11 1992-03-18 Gen Motors Corp Seat belt buckle.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9106231A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5718020A (en) * 1995-06-28 1998-02-17 European Components Co. Limited Seat belt buckle

Also Published As

Publication number Publication date
DE69006720T2 (en) 1994-07-07
ES2051523T3 (en) 1994-06-16
WO1991006231A1 (en) 1991-05-16
JPH04506922A (en) 1992-12-03
EP0452464B1 (en) 1994-02-16
GB2238074A (en) 1991-05-22
JPH07112443B2 (en) 1995-12-06
DE69006720D1 (en) 1994-03-24
GB8925036D0 (en) 1989-12-28

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