EP0341840B1 - Sicherheitsgurtschloss - Google Patents

Sicherheitsgurtschloss Download PDF

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Publication number
EP0341840B1
EP0341840B1 EP19890303771 EP89303771A EP0341840B1 EP 0341840 B1 EP0341840 B1 EP 0341840B1 EP 19890303771 EP19890303771 EP 19890303771 EP 89303771 A EP89303771 A EP 89303771A EP 0341840 B1 EP0341840 B1 EP 0341840B1
Authority
EP
European Patent Office
Prior art keywords
locking member
blocking member
seat belt
fixed bar
buckle
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
EP19890303771
Other languages
English (en)
French (fr)
Other versions
EP0341840A1 (de
Inventor
Ron Clarke
Brian M. Martin
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.)
Motors Liquidation Co
Original Assignee
Motors Liquidation Co
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 Motors Liquidation Co filed Critical Motors Liquidation Co
Publication of EP0341840A1 publication Critical patent/EP0341840A1/de
Application granted granted Critical
Publication of EP0341840B1 publication Critical patent/EP0341840B1/de
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

Definitions

  • This invention relates to seat belt buckles for seat belts in motor vehicles.
  • this invention relates to a seat belt buckle which includes a locking member pivoted in a frame of the buckle and adapted to engage and retain a separate latch plate inserted into the buckle until the locking member is released by pressure on a push button slidably mounted on the buckle frame as specified in the preamble of claim 1, for example as disclosed in GB-A-2 166 187.
  • Desirable features in such seat belt buckles comprise easy and effective latching of the latch plate in the seat belt buckle, easy release of the latch plate by pressure on the push button, and the ability to retain the latch plate in a latched position in the buckle even when the latch plate and buckle are subjected to heavy impact loading.
  • This last-mentioned feature is achieved in many seat belt buckles by the inclusion of a blocking member movably mounted in the buckle frame, which blocking member is moved over the pivoted locking member when that member is engaged with the latch plate, so as to prevent any risk of the pivoted locking member rising inadvertently to release the latch plate when the buckle is subjected to heavy impact loading.
  • a blocking member movably mounted in the buckle frame, which blocking member is moved over the pivoted locking member when that member is engaged with the latch plate, so as to prevent any risk of the pivoted locking member rising inadvertently to release the latch plate when the buckle is subjected to heavy impact loading.
  • US-A-4 388 746 One example of such a seat
  • the sloping face of the shaped blocking member is a cambered surface which is inclined towards a substantially planar portion of the locking member upon which the shaped blocking member is slidably mounted, and an abutment on the push button engages the cambered surface of the shaped blocking member in order to move the shaped blocking member from said first position to said second position, said abutment being provided with a sloping contact surface which is complementary to the cambered surface of the shaped blocking member.
  • the shaped blocking member is formed from a high strength, mouldable synthetic plastics material, such as a linear polyoxymethylene-type acetal resin produced from the polymerization of formaldehyde.
  • the fixed bar is a steel bar having a trapezium-shaped cross-section comprising a first side, a second side opposed to, and parallel to the first side, and two remaining sides which are opposed and non-parallel to one another and converge from said first side towards said second side, said fixed bar having said first side facing downwards towards the base plate of the frame; and the substantially knife-edged portion is formed by the edge of the bar between said first side and the non-parallel side which faces the rearward end of the buckle.
  • FIG 1 shows a seat belt buckle 10 according to the present invention which comprises a rigid frame 12 having an open forward end 11, an opposite rearward end 13 adapted to be attached to a seat belt (not shown), an apertured rectangular base plate 14 and side plates 16, only one of which is shown in Figure 1, each one of which extends upwards from a respective longitudinal edge of the base plate 14.
  • a fixed bar 18 extends across the space between the side plates 16 parallel to, and spaced apart from, the apertured base plate 14.
  • the fixed bar 18 is a steel bar having a trapezium-shaped cross-section comprising a first side 19, a second side 21 opposed to, and parallel to the first side 19, and two remaining sides 23 and 25 which are opposed and non-parallel to one another and converge from the first side 19 towards the second side 21.
  • the fixed bar 18 is located in trapezium-shaped apertures in the side plates 16 so that the first side 19 of the bar faces downwards towards the base plate 14 of the frame 12, and the non-parallel side 25 faces the rearward end 13 of the frame 12.
  • the first side 19 of the fixed bar 18 meets the non-parallel side 25 at an edge 27 which forms a substantially knife-edged portion extending across the width of the base plate 14 and facing the rearward end 13 of the frame.
  • a push button 20 is slidably mounted between the side plates 16 for to and fro movement with respect to, and substantially parallel with, the apertured base plate 14, the push button 20 being spaced apart from the apertured base plate 14 so as to define a rectangular slot-like passage 22 therebetween at the open forward end 11 of the frame 12, to allow access of an apertured latch plate 24 into the buckle 10.
  • a locking member 26 is pivoted between the side plates 16 on integral wing portions 28 (see Figure 3), each of which extends from a respective side of the locking member 26 and is located in an open pivot recess 30 in a respective side plate 16, so that the locking member 26 pivots about an axis extending across the space between the side plates 16 that is substantially parallel to both the axis of the fixed bar 18 and the plane of apertured base plate 14.
  • Locking member 26 can pivot between a latched position, shown in Figure 1, in which an integral dependent lock bar 32 engages behind an integral cross-bar 34 of the apertured latch plate 24, and an unlatched position, shown in Figure 2, in which a bottom surface 36 of the lock bar 32 is raised above the rectangular slot-like passage 22 provided for the apertured latch plate 24.
  • each open pivot recess 30 is formed as an aperture through the respective side plate 16 having an adjacent section of the side plate removed to allow the easy insertion of the respective wing portion 28 into the recess 30 during the assembly of the buckle 10.
  • Locking member 26 has two dependent legs 38, only one of which is shown in the drawings, which extend from adjacent the pivot axis of the locking member 26 to close to the apertured base plate 14, which legs 38 move between the position shown in Figure 1, where they are upright with respect to apertured base plate 14, to a forward, inclined position shown in Figure 2, as the locking member 26 pivots between the latched and unlatched positions.
  • the locking member 26 includes a downwardly-cranked portion 40 forward of each wing portion 28, and a central limb 42.
  • the remaining portion of locking member 26 takes the form of a substantially rectangular planar portion 44 extending forwardly from the two downwardly-cranked portions 40 to overlie the rectangular slot-like passage 22, and carries the dependent lock bar 32.
  • planar portion 44 of the locking member 26 is substantially parallel to apertured base plate 14.
  • a shaped slider block 46 is slidably mounted upon the planar portion 44 of locking member 26 for sliding movement to and fro in a direction parallel to the direction of insertion of the apertured latch plate 24 into the rectangular slot-like aperture 22 in the buckle 10.
  • the shaped slider block 46 includes a substantially flat upper surface 48, a cambered forward surface 50 and a centrally-placed, rearwardly-extending spring housing 52.
  • the cambered forward surface 50 is inclined towards the planar portion 44 of the locking member 26.
  • a helical coil spring 54 has one end thereof located within the rearwardly-extending spring housing 52 of slider block 46 and the other end thereof located over the end of the central limb 42 of locking member 26, and biases the slider block 46 towards the forward end of planar portion 44.
  • the dimensions of the slider block 46 are such that, when the buckle is in the latched condition shown in Figure 1, the slider block 46 can slide under the fixed bar 18 with the flat upper surface 48 of the slider block 46 in contact with the first side 19 of the fixed bar 18, under the spring bias exerted by coil spring 54.
  • the forward movement of slider block 46 beneath the fixed bar 18 is limited by the slider block 46 contacting abutments 56 formed on push button 20.
  • Shaped slider block 46 is moulded from a high strength synthetic plastics material, such as a linear polyoxymethylene-type acetal resin produced from the polymerization of formaldehyde.
  • An example of such an acetal resin is the acetal resin sold under the trade name of Delrin.
  • Push button 20 includes two rearwardly-extending arms 59, only one of which is shown in Figure 1, which traverse the second side 21 of fixed bar 18 and terminate in outwardly-extending ears 61 (see Figure 3) which are slidably housed in respective rectangular apertures formed in the side plates 16 of the frame 12, and form the means whereby the push button 20 is slidably mounted for to and fro movement on the frame 12.
  • the buckle 10 also includes a shaped ejector 58 which is slidably mounted upon the apertured base plate 14 for to and fro movement within an aperture 60 in the base plate 14, parallel to the direction of insertion of the apertured latch plate 20 into the rectangular slot-like aperture 22 in the buckle 10.
  • Shaped ejector 58 is symmetrically shaped about the longitudinal axis of the apertured base plate, and comprises a main body portion 62 which slides upon an upper surface of apertured base plate 14, a depending central portion 64 which is located within aperture 60, and ramped upper wing portions 66, only one of which is shown in the drawings.
  • Shaped ejector 58 is biased towards the open end of the rectangular slot-like aperture 22 by means of a helical coil ejector spring 68 which is located between a rearward end of depending central portion 64 and a spring abutment 70 formed on the apertured base plate 14.
  • a forward end 72 of each of the ramped upper wing portions 66 contacts a respective abutment 74 in the push button 20 to maintain the push button in an extended position and a forward edge 78 of the main body portion 62 is positioned adjacent a forward edge 80 of aperture 60 in the base plate 14.
  • the apertured latch plate 24 is inserted into the rectangular slot-like passage 22 until the cross-bar 34 of the latch plate 24 makes contact with the forward edge 78 of the main body portion 62 of ejector 58. Further insertion of the latch plate 24 pushes the shaped ejector 58 rearwardly along the apertured base plate 14, compressing the ejector spring 68, until rear faces 84 of the main body portion 62 of the ejector 58 make respective contacts with the lower, free ends of the depending legs 38 of locking member 26.
  • the wing portions 28 of the locking member 26 recover elastically, so as to return the lock bar 32 to its original latched position in which the forward face 86 is spaced from the forward edge 80 of aperture 60 by a predetermined clearance indicated between the opposed arrows in Figure 2. This predetermined clearance allows the lock bar 32 of the locking member 26 to swing upwards clear of the apertured base plate 14 during the release of the latch plate 24 from the buckle 10.
  • the latch plate 24 is released from the buckle 10 by the depression of the push button 20, which applies force to the slider block 46 through the contact of the inclined contact face 57 of the abutment 56 of the push button 20 with the cambered forward surface 50 of slider block 46. Because of the relative inclinations of cambered forward surface 50 and contact face 57, the force applied to the slider block 46 has an upward component directed towards the fixed bar 18 tending to lift both the slider block 46 and planar portion 44 of the locking member 26. Slider block 46 moves along the planar portion 44 of locking member 26, compressing coil spring 54, until the flat upper surface 48 of the slider block 46 moves out of contact with the fixed bar 18.
  • the forward movement of the ejector 58 produced by the action of the compressed ejector spring 68 causes the forward ends 72 of the ramped upper wing portions 66 of the ejector 58 to contact the respective abutments 74 in the push button 20 to return the push button 20 to the extended position thereof.
  • This forward movement of the ejector 58 ensures the complete removal of the lock bar 32 from the vicinity of the latch plate 24, thus avoiding any possibility of any partial dis-engagement of the lock bar 32 with the latch plate 24.
  • the latching member 26 is positively retained in the upper, unlatched position shown in Figure 2 by the spring-biased contact of the cambered forward face 50 of slider block 46 with the knife-like rear edge 27 of fixed bar 18 producing an upward bias on the latching member 26, and remains in this unlatched position until the latch plate 24 is re-inserted into the buckle 10. Consequently, this feature provides a very positive safeguard against the risks of any false latching of the buckle, since it is not possible to produce a partial engagement of the latch plate 24 in the buckle 10.
  • the forward ends 72 of the ramped upper wing portions 66 of the ejector 58 overlie portions of the latch plate 24 when the latch plate is engaged in the buckle 10.
  • the forward ends 72 of the ramped upper wing portions 66 of the ejector 58 are sandwiched between the upper surface of the latch plate 24 and the under surface of planar portion 44 of latching member 26 to substantially prevent any tendency of the latch plate to rattle within the buckle when fully latched therein.
  • the seat belt buckle of the present invention provides an effective and secure closure member for a vehicle seat belt, in which it is possible to rapidly and easily latch an associated latch plate into position in the buckle, to retain that latch plate securely in place within the buckle even under circumstances where the buckle and latch plate are subjected to high levels of loading, and to readily and effectively disconnect that latch plate from engagement in the buckle with a relatively low level of force applied to a push button release mechanism of the buckle.

Landscapes

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

Claims (6)

  1. Sicherheitsgurtschloß (10) geeignet zum lösbaren Inein-grifftreten mit einer in einen Einrastdurchgang (22) im Sicherheitsgurtschloß (10) einführbaren Rastplatte (24), wobei das Sicherheitsgurtschloß (10) umfaßt: einen festen Rahmen (12) mit einem offenen, vorderen, den Einrastdurchgang (22) definierenden Ende (11) einem gegenüberliegenden, rückwärtigen Ende (13), das an dem Sicherheitsgurt befestigt werden kann, eine mit einer Öffnung versehene, rechtwinklige Basisplatte (14), eine aufrechtstehende Seitenwand (16), die sich von jeder longitudinalen Kante der Basisplatte (14) erstreckt, ein Verriegelungselement (26), das durch die Rahmenseitenwände (16) schwenkbar zum Schwenken zwischen einer verrasteten Position und einer nicht verrasteten Position gestützt ist, wobei das Verriegelungselement (26) einen herabhängenden, sich von diesen erstreckenden Verriegelungsstab (32) umfaßt, der sich quer über den Einrastdurchgang (22) und in eine Öffnung der Rastplatte (24) erstreckt, wenn sich das Verriegelungselement (26) in der verrasteten Position befindet, ein geformtes Sperrelement (46), das gleitfähig auf dem schwenkbar angeordneten Verriegelungselement (26) zur longitudinalen Bewegung relativ zum Verriegelungselement (26) zwischen einer ersten Position, in der sich das Verriegelungselement (26) in der verrasteten Position befindet und das Blockierelement (46) jegliche Schwenkbewegung des Verriegelungselements (26) in Richtung seiner nicht verrasteten Position verhindert, und einer zweiten Position befestigt ist, in der sich das Verriegelungselement (26) in der nicht verrasteten Position befindet, einen an den Rahmenseitenwänden (16) über der Rastplatte (22) zur longitudinalen Bewegung relativ zur Rahmenbasisplatte (14) verschiebbar befestigten Druckknopf (20), um das Sperrelement (46) von der ersten Position in die zweite Position zu bewegen; und ein zwischen dem Sperrelement (46) und dem Verriegelungselement (26) angeordnetes Federmittel (54), das das Sperrelement (46) in Richtung der ersten Position vorspannt,
    dadurch gekennzeichnet,
    daß sich ein fest angeordneter Stab (18) quer über die Breite der Basisplatte (14) zwischen deren vorderen und rückwärtigen Enden erstreckt, parallel zu und beabstandet von der Basisplatte (14), wobei der fest angeordnete Stab (18) an jedem Ende mit einer entsprechenden Seitenwand (16) befestigt ist; daß das Verriegelungselement (26) schwenkbar durch die Rahmenseitenwände (16) gestützt ist, so daß es um eine im wesentlichen parallel zu und beabstandet von dem fest angeordneten Stab (18) des Rahmens (12) angeordnete Achse zwischen der verrasteten Position, in der das Verriegelungselement (26) die Rastplatte (24) im Einrastdurchgang (22) im Schloß (10) hält, und der unverrasteten Position schwenkt, in der das Verriegelungselement (26) frei vom Einrastdurchgang (22) gehalten ist; daß das geformte Sperrelement (46) in der ersten Position zwischen dem fest angeordneten Stab (18) und dem Verriegelungselement (26) zwischengeschaltet ist, um jegliche Schwenkbewegung des Verriegelungselements (26) in Richtung der unverrasteten Position zu sperren, und in der zweiten Position des Sperrelements (46), in der sich das Verriegelungselement (26) in der nicht verrasteten Position befindet, das Sperrelement (46) mit dem fest angeordneten Stab (18) in Eingriff tritt, um das Verriegelungselement (26) in der nicht verrasteten Position zu halten; daß der fest angeordnete Stab (18) mit einem allgemein messerschneidenartigen Teil (27) versehen ist, der dem rückwärtigen Ende (13) des Schlosses (10) zugewandt ist und sich quer über die Breite der Basisplatte (14) erstreckt; und daß das geformte Sperrelement (46) mit einer abfallenden Fläche (50) versehen ist, die allgemein einen Linienkontakt mit dem allgemein messerschneidenartig ausgebildeten Teil (27) des fest angeordneten Stabes (18) während der Schwenkbewegung des Verriegelungselements (26) aus der nicht verrasteten Position in eine Position bildet, in der das Federmittel (54) das Sperrelement (46) in der ersten Position verrasten kann.
  2. Sicherheitsgurtschloß nach Anspruch 1,
    dadurch gekennzeichnet, daß die abfallende Fläche (50) des geformten Sperrelements (46) eine gewölbte Oberfläche ist, die in Richtung eines im wesentlichen planaren Teils (44) des Verriegelungselements (26) ansteigt, auf dem das geformte Sperrelement (46) gleitbar befestigt ist.
  3. Sicherheitsgurtschloß nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, daß das geformte Sperrelement (46) aus einem eine hohe Steifigkeit aufweisenden, formbaren, synthetischen Kuststoffmaterial gebildet ist.
  4. Sicherheitsgurtschloß nach Anspruch 3,
    dadurch gekennzeichnet, daß das geformte Sperrelement (46) aus einem linearen polyoxymethylenartigen Acetal-Harz gebildet ist, das bei der Polymerisation von Formaldehyden erzeugt wird.
  5. Sicherheitsgurtschloß gemäß einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, daß der fest angeordnete Stab (18) ein Stahlstab mit einem trapezförmigen Querschnitt ist, umfassend eine erste Seite (19), eine gegenüberliegend und parallel zu der ersten Seite (19) verlaufende zweite Seite (21) und zwei restliche Seiten (23, 25), die sich gegenüberliegen und nicht parallel zueinander sind und von der ersten Seite (19) in Richtung der zweiten Seite (21) konvergieren, wobei die erste Seite (19) des fest angeordneten Stabes (18) nach unten in Richtung der Basisplatte (14) des Rahmens (12) gewandt ist; und der allgemein messerschneidenartige Teil (27) durch die Kante des Stabes (18) zwischen der ersten Seite (19) und der nicht parallelen Seite (25) gebildet ist, die dem rückwärtigen Ende (13) des Schlosses (10) zugewandt ist.
  6. Sicherheitsgurtschloß nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß eine Stütze (56) am Druckknopf (20) mit der gewölbten Oberfläche (50) des geformten Sperrelements (46) in Eingriff steht, um das geformte Sperrelement (46) aus der ersten Position in die zweite Position zu bewegen, wobei die Stütze (56) mit einer abfallenden Kontaktoberfläche (57) versehen ist, die komplementär zur gewölbten Oberfläche (50) des geformten Sperrelements (46) ausgebildet ist.
EP19890303771 1988-05-11 1989-04-17 Sicherheitsgurtschloss Expired - Lifetime EP0341840B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8811140A GB2218458B (en) 1988-05-11 1988-05-11 Seat belt buckle
GB8811140 1988-05-11

Publications (2)

Publication Number Publication Date
EP0341840A1 EP0341840A1 (de) 1989-11-15
EP0341840B1 true EP0341840B1 (de) 1993-02-10

Family

ID=10636718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890303771 Expired - Lifetime EP0341840B1 (de) 1988-05-11 1989-04-17 Sicherheitsgurtschloss

Country Status (5)

Country Link
EP (1) EP0341840B1 (de)
JP (1) JPH0669402B2 (de)
DE (1) DE68904807T2 (de)
ES (1) ES2037952T3 (de)
GB (1) GB2218458B (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2238074A (en) * 1989-11-06 1991-05-22 Europ Components Corp Seat belt buckle.
DE4416138C2 (de) * 1994-05-06 2002-06-13 Trw Repa Gmbh Verschluß für Sicherheitsgurte
DE4422224C2 (de) * 1994-06-24 2003-06-26 Opel Adam Ag Sicherheitsgurtschloß
GB2302705A (en) * 1995-06-28 1997-01-29 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
DE19858716C1 (de) * 1998-12-18 2000-05-18 Breed Automotive Tech Verschluß für einen Sicherheitsgurt

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096606A (en) * 1976-03-04 1978-06-27 Allied Chemical Corporation Ferrule buckle with sliding release button
DE2740458C3 (de) * 1977-09-08 1983-12-29 Carl Stahl Gmbh & Co Kg, Gurt- Und Bandweberei, 7922 Herbrechtingen Gurtschloß, insbesondere für Sicherheitsgurte
SE426018B (sv) * 1980-03-12 1982-12-06 Safety Transport Int Dev Spenne for sekerhetsbelte
FR2482430B1 (de) * 1980-05-14 1983-12-23 Peugeot Aciers Et Outillage
US4550474A (en) * 1983-11-21 1985-11-05 Gateway Industries, Inc. Safety belt buckle
GB2166187B (en) * 1984-10-30 1988-06-15 Takata Corp Seat belt latch buckle
US4703542A (en) * 1985-02-12 1987-11-03 Ashimori Industry Co., Ltd. Buckle for seat belts

Also Published As

Publication number Publication date
JPH0669402B2 (ja) 1994-09-07
ES2037952T3 (es) 1993-07-01
GB2218458A (en) 1989-11-15
GB2218458B (en) 1992-04-15
EP0341840A1 (de) 1989-11-15
DE68904807D1 (de) 1993-03-25
DE68904807T2 (de) 1993-05-27
GB8811140D0 (en) 1988-06-15
JPH0249605A (ja) 1990-02-20

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