EP0231335B1 - Mecanisme de serrure avec deux elements de verrouillage - Google Patents

Mecanisme de serrure avec deux elements de verrouillage Download PDF

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Publication number
EP0231335B1
EP0231335B1 EP19860904970 EP86904970A EP0231335B1 EP 0231335 B1 EP0231335 B1 EP 0231335B1 EP 19860904970 EP19860904970 EP 19860904970 EP 86904970 A EP86904970 A EP 86904970A EP 0231335 B1 EP0231335 B1 EP 0231335B1
Authority
EP
European Patent Office
Prior art keywords
elements
latch member
lock mechanism
lock
primary latch
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
EP19860904970
Other languages
German (de)
English (en)
Other versions
EP0231335A1 (fr
Inventor
Per-Olof Weman
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.)
Autoliv Development AB
Original Assignee
Autoliv Development AB
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 Autoliv Development AB filed Critical Autoliv Development AB
Publication of EP0231335A1 publication Critical patent/EP0231335A1/fr
Application granted granted Critical
Publication of EP0231335B1 publication Critical patent/EP0231335B1/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

Definitions

  • the present invention relates to a lock mechanism.
  • lock mechanisms are used in order to protect human life or to secure or retain persons or objects in such a manner that they can be released rapidly and easily when required.
  • Such lock mechanisms are used e.g. in automotive safety belts and other safety belts but the use of these lock mechanisms is of interest also in many other fields. Even if the invention has been developed particularly in connection with automotive safety belts it is not limited to this narrow field; the invention can be applied more generally in different technical fields where the same problem is encountered as in connection with automotive safety belts.
  • the lock mechanism of an automotive safety belt in the first place must provide a locking of the belt which is so safe that the lock can fulfil the vital function thereof in a reliable manner but at the same time it is required that the lock mechanism can be operated and disengaged without major effort, e.g. in order to release rapidly the user of the automotive safety belt after an accident.
  • the lock mechanism on which the invention is based is of the prior art type having a primary latch member which is displaceable between an engaged position wherein it is engaged with a lock tongue and a disengaged position, and a secondary latch member which is mounted to maintain in a locking position the primary latch member in the engaged position and can be manually operated to disengage the primary latch member, said secondary latch member comprising two separate elements.
  • Locks of this type are available in many different embodiments and are amply represented in the patent literature. In this conneciton, only as an example, reference is made to EP-A-0 060 254 which discloses one embodiment of such a lock mechanism.
  • this lock mechanism for the purpose mentioned has obtained the characteristics according to claim 1.
  • FIGS. 1 and 2 there is shown a lock housing 1 having a primary latch member 2 for engagement with a lock tongue 8.
  • a secondary latch member 3 which can comprise a pin or the like and is biased by means of a compression spring 4 to the position in FIG. 1 wherein said secondary latch member is positioned over an engagement surface 2′ of the latch member 2. In this position, the latch member 3 prevents the latch member 2 from disengaging the lock tongue.
  • a push button 5 can be actuated against the bias of a spring 6 to displace the latch member 3 to the disengaged position, FIG. 2, such that the latch member 2 can be pivoted upwards to disengage the lock tongue.
  • An ejector 7 which is biased by means of a compression spring 9, is provided to eject the lock tongue when disengaged.
  • the secondary latch member is constructed as a rocker 31.
  • the lock mechanism is in the engaged position in FIG. 3, and when it is to be brought into the disengaged position, the latch member 31 is pivoted in clockwise direction, which means that the lower end of the rocker will move in the direction of the black arrow to the position of FIG. 4.
  • the latch member 31 can be considered a double-armed lever one arm of which engages the primary latch member and the other arm of which is biased by means of the spring 4. If the lower part of the latch member 31 is heavier than the upper part, the lock will be opened at a specific acceleration in the direction of the white arrow. If the upper part of the latch member 31 is heavier than the lower part, the lock will be opened by an acceleration in the opposite direction. Now, it has to be taken into account that the push button 5 has its own inertia which will influence the dynamic of the latch member 31 in one case or the other.
  • the lock of FIG. 5 to which reference is now made is constructed according to the invention and the elements included therein, which are identical with corresponding elements in the figures previously described, are provided with the same references.
  • the secondary latch member in this case comprises two elements 32 and 33 which are displaceably guided in a slot in the lock housing and are displaceable towards and away from each other. Thus, they can take different positions which are illustrated in FIGS. 5 to 8.
  • the lock mechanism is in the normal latching position or engaged position thereof.
  • the mutually engaged elements 32 and 33 both co-operate with the latch member 2 to maintain this member in the engaged position, the partition line between the elements being located substantially centrally on the engagement surface 2′.
  • FIG. 9 illustrates the application on pivoted elements 32′ and 33′, and as will be easily seen, the function will be the same as in case of linearily displaceable elements.
  • the important aspect of the lock mechanism according to the invention is that the lock mechanism can be brought to the disengaged position only if the elements forming the secondary latch member both are moved completely apart at the same time. At rectilinear accelerations or retardations, the lock mechanism will stay in the engaged position, because if one element moves away from the primary latch member 2, the other element will still be in the latching position.
  • the lock mechanism of FIGS. 5 to 9 is substantially more advantageous than the lock mechanisms available today; however, it is not completely perfect. If it is assumed that the primary latch member 2 is latched by means of the two elements 32 and 33, FIG.
  • the elements 32 and 33 according to the invention are shaped such that the centre of gravity of the element 32 is located in the area of the element 33, i.e. at that side of the partition line between the elements, which is opposite to the element 32, and the centre of gravity of the element 33 is located in an analogous manner in the area of the element 32.
  • the lock mechanism will be more securely latched against the influence of uncontrolled forces, the greater the rotational acceleration and the translational acceleration.
  • the element 32 is constructed as part of a frame 320 while the element 33 is constructed as part of a T-piece 330.
  • the elements 32 and 33 have the same position as in FIG. 5, but the centres of gravity of the frame and the T-piece are reversed in relation to the partition line between the elements 32 and 33 in the manner previously indicated.
  • the primary latch member 2 has a recess 20, FIG. 12, for the stem of the T-piece in order that said stem cannot lock the primary latch member.
  • this member has two projecting shoulders 21, the two elements 32 and 33 which form the secondary latch element, co-operating with said shoulders.
  • the latch element 2 has a lock detent 22 to engage the lock tongue, and two arms 23 for the pivotal mounting in the lock housing 1.
  • the element 32 In order to disengage the primary latch member 2 the element 32 must be displaced to the left as seen in FIGS. 10 and 11, i.e. in the opposite direction of the push button 5. This can be achieved by the push button 5 being provided with arms 51 one at each side of the lock, but only one arm is shown in FIG. 10, these arms providing the necessary movement of the element 32, i.e. the frame 320, over rockers 11. Between the elements 32 and 33 a compression spring 12 is provided which orientates the two elements in relation to each other, but which does not determine the level at which the lock mechanism opens by itself at an acceleration, if any, as in case of prior art lock mechanisms. In order to balance completely the lock mechanism it is only necessary to make the frame 320 heavier than the push button 5 and the spring 6 (not shown in FIG.
  • rockers 11 co-operating with the push button.
  • the rockers 11 comprise autonomous bodies sensitive to rotation, but can actuate only one of the elements 32 and 33, and thus the security of the lock mechanism is not jeopardized as a consequence thereof.
  • the risk of the latch member 2 being unintentionally disengaged is exceedingly small, because the overlapping distance is large in relation to the gap in the disengaged position of the other element and corresponds to the thickness of the shoulders 21.
  • the overlapping distance can be increased by angling the shoulders in the manner shown in FIG. 13 wherein the overlapping distance is indicated at 1.
  • the lock mechanism can be made still more safe by the elements 32 and 33 being divided into several units. Then, these units will form autonomous oscillating masses at vibrations. Each such division will increase the time required for random uncovering of the shoulders 21 with several tenth powers.

Landscapes

  • Lock And Its Accessories (AREA)
  • Buckles (AREA)

Abstract

Mécanisme de serrure muni d'un loquet (2) primaire pouvant se déplacer entre une position dégagée et une position engagée et de deux éléments séparés (32, 33) prévus comme loquet secondaire, qui sont montés pour coopérer simultanément avec le loquet primaire afin de maintenir celui-ci dans la position engagée, et qui peuvent être déplacés dans des directions opposées à la suite d'un actionnement manuel pour dégager le loquet primaire.

Claims (10)

1. Mécanisme de verrouillage ayant un organe de blocage primaire (2) qui peut être déplacé entre une position engagée où il est engagé avec une languette de verrouillage (8) et une position désengagée, et un second organe de blocage qui est monté de façon à maintenir en position vérouillée le premier organe de blocage dans la position engagée et qui peut être actionné manuellement pour désengager le premier organe de blocage, le deuxième organe de blocage comprenant deux éléments séparés (32, 33), caractérisé en ce que les deux éléments (32, 33) sont guidés en déplacement pour un mouvement conjoint afin d'être engagés au moins un à la fois directement avec l'organe de blocage primaire (2) également sous l'influence des forces d'inertie agissant sur les éléments, des moyens étant fournis pour séparer les éléments par une opération manuelle, afin de dégager le premier organe de blocage.
2. Mécanisme de verrouillage selon la revendication 1, caractérisé en ce que les éléments (32, 33) sont engagés mutuellement en position de verrouillage.
3. Mécanisme de verrouillage selon la revendication 2, caractérisé en ce que les éléments (32, 33) sont disposés pour recouvrir en position verrouillée une surface d'engagement (2′) du premier organe de blocage.
4. Mécanisme de verrouillage selon la revendication 3, caractérisé en ce que les éléments (32, 33) peuvent être séparés par une opération manuelle d'un espace qui est seulement sensiblement plus large que la largeur de la surface d'engagement (2′).
5. Mécanisme de verrouillage selon la revendication 4, caractérisé en ce que la ligne de séparation entre les éléments (32, 33) en position verrouillée est placée sensiblement au centre de la surface d'engagement (2′).
6. Mécanisme de verrouillage selon l'une des revendications 2 à 5, caractérisé en ce que les éléments (32, 33) peuvent être déplacés l'un vers l'autre et l'un à l'opposé de l'autre dans un plan.
7. Mécanisme de verrouillage selon l'une des revendications 2 à 6, caractérisée en ce que les éléments (32, 33) sont forcés élastiquement pour s'engager l'un avec l'autre dans la position de verrouillage.
8. Mécanisme de verrouillage selon l'une des revendications 2 à 7, caractérisé en ce que chaque élément (32, 33) s'engage avec l'autre élément depuis un côté de la ligna de séparation entre les éléments et a son centre de gravité de l'autre côté de la ligne de séparation entre les éléments.
9. Mécanisme de verrouillage selon la revendication 8, caractérisé en ce qu'un élément (32) fait partie d'un cadre (320) et en ce que l'autre élément fait partie d'une pièce en T (330) dont la barre transversale est située à l'intérieur du cadre.
10. Mécanisme de verrouillage selon la revendication 9, caractérisé en ce que l'organe de blocage primaire (2) forme des épaulements (21) de chaque côté de la tige de la pièce en T (330) pour coopérer avec les deux éléments (32, 33).
EP19860904970 1985-08-02 1986-08-01 Mecanisme de serrure avec deux elements de verrouillage Expired - Lifetime EP0231335B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8503684 1985-08-02
SE8503684A SE456396B (sv) 1985-08-02 1985-08-02 Lasmekanism i exv sekerhetsbelte, med ett primert och ett sekundert sperrorgan

Publications (2)

Publication Number Publication Date
EP0231335A1 EP0231335A1 (fr) 1987-08-12
EP0231335B1 true EP0231335B1 (fr) 1991-06-19

Family

ID=20361016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860904970 Expired - Lifetime EP0231335B1 (fr) 1985-08-02 1986-08-01 Mecanisme de serrure avec deux elements de verrouillage

Country Status (3)

Country Link
EP (1) EP0231335B1 (fr)
SE (1) SE456396B (fr)
WO (1) WO1987000735A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2195140B (en) * 1986-09-16 1990-09-26 Autoliv Dev Improvements in or relating to a seat belt buckle
DE9202525U1 (fr) * 1992-02-27 1992-04-16 Autoliv Development Ab, Vaargaarda, Se
DE9202528U1 (fr) * 1992-02-27 1992-04-16 Autoliv Development Ab, Vaargaarda, Se

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1518748A (en) * 1921-03-09 1924-12-09 Muller Carl August Safety lock

Also Published As

Publication number Publication date
SE8503684D0 (sv) 1985-08-02
EP0231335A1 (fr) 1987-08-12
SE456396B (sv) 1988-10-03
WO1987000735A1 (fr) 1987-02-12
SE8503684L (sv) 1987-02-03

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