EP0079367A1 - Mecanisme de verrouillage pour ceinture de securite - Google Patents

Mecanisme de verrouillage pour ceinture de securite

Info

Publication number
EP0079367A1
EP0079367A1 EP19820901636 EP82901636A EP0079367A1 EP 0079367 A1 EP0079367 A1 EP 0079367A1 EP 19820901636 EP19820901636 EP 19820901636 EP 82901636 A EP82901636 A EP 82901636A EP 0079367 A1 EP0079367 A1 EP 0079367A1
Authority
EP
European Patent Office
Prior art keywords
transmission element
latch
inertia body
support surface
activating
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.)
Withdrawn
Application number
EP19820901636
Other languages
German (de)
English (en)
Inventor
Stig Karl-Gunnar Lindblad
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.)
Safety Transport International Development AB
Original Assignee
Safety Transport International 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 Safety Transport International Development AB filed Critical Safety Transport International Development AB
Publication of EP0079367A1 publication Critical patent/EP0079367A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/03—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses by using non-electrical means
    • G01P15/032—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses by using non-electrical means by measuring the displacement of a movable inertial mass
    • G01P15/036—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses by using non-electrical means by measuring the displacement of a movable inertial mass for indicating predetermined acceleration values
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/36—Belt retractors, e.g. reels self-locking in an emergency
    • B60R22/40—Belt retractors, e.g. reels self-locking in an emergency responsive only to vehicle movement

Definitions

  • the present invention relates to a latch me c a n i s m of ' the kind referred to in the preamble of " the accom- panying claim 1.
  • Latch mechanisms of the related kind are intended to latch a strap roller against withdrawal of a belt strap wound on said roller and to release the roller for withdrawal of said strap, respectively, in dependence on -activating means to be actuated by inertia forces.
  • the purpose of the present invention is therefore to provide a latch mechanism wherein the activating means can be constructed such that the latch is changed over by a short and distinct movement.
  • FIGS. 1 and 2 show a section through a roll-up mechanism incorporated in a roller belt, to which the latch mechanism according to the invention advantageously can be applied
  • FIGS. 3, 4, and 5 show a vertical central section through a latch mechanism according to the invention in a deactivated position, an intermediary position and a fully activated position, respectively.
  • the roll-up mechanism 1 comprises substant ally a strap roller 2 t " ⁇ which one end of the. strap 3 of the safety belt is connected.
  • the strap roller is rotatably mounted in two end pieces 4,
  • the activating means according to the invention is an automat cally operating mechanism actuated by inertia forces, which is shown in more detail in the other figures.
  • the latch mechanism 8 is shown in FIG. 2 and comprises basically ⁇ a latch 9 mounted for pivotal movement in a joint 16, and a ratchet 10.
  • the latch is adapted to co-operate with the ratchet 10 in order to latch the ratchet against rota ⁇ tion in one direction and, alternati ely, to release the ratchet, the strap roller 2 as a consequence thereof being latched against rotation in one direction and being released, respect vely.
  • the mechanism referred to above is shown quite diagrammati- cally in FIG. 2 and basically it can include a simple embodiment wherein the ratchet 10 is rigidly connected to the strap roller.
  • the latch 9 must, however, take up the load acting on the belt strap, and therefore the latch mechanism 8 in practice is of such embodiment that the mechanism shown is adapted to initiate a second mechanism, relieving the latch 9, which is adapted to take up stresses in the belt strap.
  • OMPI mechanism can be arranged e.g. in such a way that it is initiated also by the acc-elerati on forces occurring when the belt strap is rapidly withdrawn.
  • a description in detail of such a echani sm " for the sake of clarity has been excluded from the present applica ⁇ tion because it is known and because such description is not necessary for the understanding of the function and the basic construction of the present invention.
  • the activating means 7 is buil.t up substantially of an inertia body 11 and a transmission element 12.
  • the inertia body 11 and the transmission element 12 are positioned in a holder 13 including a space 1.4 which has an envelope surface 15 formed as a truncated cone turned up and down.
  • the space 14 has a support surface 17 for the transmission element 12.
  • the support surface 17 is completely flat and has a circular marginal portion 18 which forms a bearing position for the transmission element, about which this element can turn to an activated position as will be described in more detail below.
  • the support surface 17 is penetrated by a central bore 19 which can be used fo attaching the holder 13 in an attachment projecting from the end piece 5 but not shown.
  • the transmission element comprises a base portion 20 which has a flat circular base surface 21 , the transmission element being adapted to rest on the support surface 17 at said base surface.
  • the base surface 21 has a circular peripheral marginal portion 22 about which the transmission element can turn against the marginal portion 18 of the support surface.
  • the base portion 20 has substantially the form of a truncated cone with a conical peripheral envelope surface 23.
  • a support surface 24 for the inertia body 11 is arranged above the base portion 20. This support surface 24 is annular and is adapted to support the inertia body which in a rest position shown in FIG. 3 rests against this support .sjurface with a portion of the base surface 25 thereof, which is flat.
  • the inertia body 11 has a through elongated " cylindrical cavity 26 through which the transmission element 12 extends.
  • the transmission element tapers conically from below and has a sensing portion 27 spaced from the support surface 24 of.the inertia body, said sensing portion being adapted to co-operate with an abutment surface or edge 28 of the cavity 26 of the inertia body.
  • the transmission element 12 has an activating portion 29 which projects into an operating portion 30 of the latch 9.
  • This operating portion 30 is fixedly arranged on the lower side of the latch and is shaped as a bowl turned up and down and having a concave operating surface 31 angled to the longitudinal axis of the transmission element 12, the entire activating means 7 and the operating portion 30 of the latch being rotationally symmetrical about said axis to provide an identical function in all directions in relation to the symmetry axis of the activating means, which accordingly coincides with the longitudinal axis of the transmission element when this element is in the rest position of the activating means according to FIG. 3.
  • the latch mechanism At constant speed of the vehicle and normal speed changes the latch mechanism is in the releasing position according to FIG. 3, the latch 9 being pivoted with the engagement portion 32 thereof in a lower position and with said portion spaced from the latch teeth 33 of the ratchet 10. Then, the withdrawal of the strap is allowed in order to permit some freedom of movement of the belt user. Also when the vehicle is not moving with the exception of steep i ncl inati on- of the vehicle the latch mechanism is in the releasing position so as to make
  • the transmission element 12 In the releasing position of the activating means the transmission element 12 is in rest position as will be seen from FIG. 3, resting with the base surface 21 thereof against the support surface 17 in the holder, while the inertia body 11 is in the rest position there ⁇ of resting with the base surface 25 thereof against the annular support surface 24 of the transmission element 12. Then, the latch 19 rests ' with the bowl-formed operating portion 30 thereof against the activating portion 29 of the transmission element, i.e. the upper end of said element. It should be noted that the operating portion 30 in its entirety is somewhat inclined, i.e. it has a rotationally symmetrical axis including an angle with the lo ⁇ gi tudi nal axis of the transmission element.
  • this angular posi ⁇ tion is to compensate for the varying distance of the operating surface 31 to the pivot axis 16 of the latch 9.
  • the transmission element at a p portion which is received by the lower end of the cavity 26 has substantially the same diameter as the cavity with a small play in order to allow the movement of the inertia body in relation to the trans ⁇ mission element. Due to the fact that the transmission element tapers upwards in the cavity 26 the element will have a substantially smaller diameter than the cavity at the upper end thereof.
  • the activating means 7 will be exposed to inertia forces causing the inertia body 11 to turn from the rest posi ⁇ tion thereof, shown in FIG. 3, to an activated position, shown in FIG. 5, at a predetermined speed change, the inertia body engaging the conical envelope surface 15 in the space 14 of the holder 13 at a portion of the cylindrical envelope surface 34 thereof in said activated position.
  • the transmission element At the beginning of the turning movement of the inertia body, the transmission element will be maintained in the neutral rest position there ⁇ of while the inertia body turns about the "support! ng position thereof formed by the outer marginal portion
  • the inertia body 11 When the inertia body 11 has reached the intermediary position shown in FI-G. 4, the inertia body 11 w ll engage the sensing portion 27 of the transmission element 12 at the abut ⁇ ment edge 28 thereof. As a consequence thereof the transmission element 12 will follow the turning movement and will turn about the bearing point thereof, i.e. the ' marginal portion 22 will swing about a point on the outer marginal portion 18 of the support surface 17.
  • the inertia body 11 should be made of a relatively heavy material such as metal, e.g. brass, while the transmission element 12 should be made of a relatively light material as. should the latch 9, e.g. plastics.
  • the activating portion 29 thereof moves side ⁇ wards from the central position of said portion in the ve ry back of the bowl-shaped operating portion 30 of the latch.
  • the latch accordingly has been changed over to the latch position and the activating means is in the activated position with the inertia body 11 as well as the trans ⁇ mission element 12 turned and the inertia body resting with the envelope surface 34 thereof against a position on the conical envelope surface 15 in the space 14 of
  • the activating means When the speed change -h-as decreased to a pre ⁇ determined value, the activating means will be reset from the activated position to the rest position there- of in the. same manner as described above but in the opposite direction and order.
  • the inertia body 11 as well as the transmission element 12 will again swing to the neutral position thereof and then will pass the intermediary position according to FIG. 4 wherein the transmission element first takes the neutral position and the inertia body then takes the rest position thereof according to FIG. 3.
  • the activating portion 29 of the ' transmission element slides along the operating sur ⁇ face of the bowl-shaped operating portion 30, the latch being allowed to swing downwards from the latch posi ⁇ tion to the releasing position which has been reached- already in the intermediary position of the activating means according to FIG. 4.
  • OMPI mission .element can be shaped in another way.
  • the tran-smission element is not tapere.d,. the through cavity 26 in the inertia body instead flaring in a direction from below " and upwards to provide the necessary space between the engagement edge of the inertia body and the sensing portion of the transmission element in order that the desired action can be obtained.
  • the operating portion 30 of the latch 9 can have another form, e.g. a fully curved operating surface 31.
  • the inertia body 11 can have an ⁇ other shape and e.g. can have a foot at the lower end, at which the inertia body rests on the support surface of the transmission element.
  • the enlarged base portion 20 of the transmission element can be replaced e.g. by two flanges, an upper annular flange forming the support surface of the inertia body, and a lower annular flange by means of which the transmission element rests against the support surface in the holder 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Buckles (AREA)

Abstract

Mecanisme de verrouillage pour ceintures de securite du type a enrouleur destine de preference aux vehicules automobiles et contenant une courroie (3) pouvant etre deroulee d'un mecanisme d'enroulement (1) sous l'action d'un ressort de rappel. Ce mecanisme d'enroulement comprend un enrouleur de courroie (2) monte de maniere rotative a l'interieur, un mecanisme de verrouillage (8) avec une roue dentee (10) et un loquet (9) pouvant etre regle entre une position de liberation de l'enrouleur de courroie et une position de verrouillage. Un organe d'actionnement (7) sert a regler le mecanisme de verrouillage dans la position de verrouillage lorsque l'organe d'actionnement est soumis a une acceleration depassant une valeur predeterminee. Un corps d'inertie compris dans le dispositif d'actionnement est maintenu dans une position centrale de repos par une surface de support (24) sur l'element de transmission, et une deuxieme surface de support (17) est disposee dans un espace (15) dans lequel est dispose le corps d'inertie. Un element de transmission dispose de maniere operationnelle entre le corps d'inertie et le loquet possede une partie de detection (27) qui est situee dans la cavite (26) du corps d'inertie, espacee de la premiere surface de support (24), et concue de maniere a se deplacer avec l'element de transmission et a faire tourner cet element autour d'une partie marginale annulaire (18) de cette deuxieme surface de support au moyen d'une surface ou bord d'engagement (28) dans la cavite (26) du corps d'inertie qui est amenee a s'emboiter dans la partie de detection. Le loquet comprend une partie d'actionnement (30) en forme de bol renverse et pourvue d'une surface d'actionnement concave (31) formant un angle par rapport a la direction longitudinale de l'element de transmission. Une partie de commande (29) de l'element de transmission est concue de maniere a penetrer dans la partie d'actionnement et a tourner lors de la rotation du corps d'inertie et a se deplacer pendant cette rotation le long de la surface
EP19820901636 1981-05-20 1982-05-19 Mecanisme de verrouillage pour ceinture de securite Withdrawn EP0079367A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8103179 1981-05-20
SE8103179A SE8103179L (sv) 1981-05-20 1981-05-20 Sperranordning for sekerhetsbelten

Publications (1)

Publication Number Publication Date
EP0079367A1 true EP0079367A1 (fr) 1983-05-25

Family

ID=20343883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820901636 Withdrawn EP0079367A1 (fr) 1981-05-20 1982-05-19 Mecanisme de verrouillage pour ceinture de securite

Country Status (5)

Country Link
EP (1) EP0079367A1 (fr)
AU (1) AU8453582A (fr)
DE (1) DE3246033T1 (fr)
SE (1) SE8103179L (fr)
WO (1) WO1982003990A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU607789B2 (en) * 1987-08-01 1991-03-14 Britax-Kolb Gmbh & Co. Acceleration sensor for safety systems and/or seat belt systems in motor vehicles
JP3153309B2 (ja) * 1992-01-30 2001-04-09 タカタ株式会社 シートベルトリトラクタ
DE19503009C2 (de) * 1995-01-31 1998-09-10 Hs Tech & Design Beschleunigungssensor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926384A (en) * 1973-07-26 1975-12-16 Per Olof Weman Locking mechanism for automobile safety belt retractor
SE387854B (sv) * 1973-11-21 1976-09-20 O L Lindblad Paverkningsorgan, foretredesvis avsett att anvendas i samband med fordonsekerhetsselar
SE397269B (sv) * 1974-08-29 1977-10-31 Autoliv Ab Pendel
BR7705009A (pt) * 1976-08-10 1978-04-04 Ferodo Sa Dispositivo de inercia,especialmente para comandar o aferrolhamento de um enrolador-desenrolador de correia ou analogo

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8203990A1 *

Also Published As

Publication number Publication date
DE3246033T1 (de) 1984-10-18
AU8453582A (en) 1982-12-07
SE8103179L (sv) 1982-11-21
WO1982003990A1 (fr) 1982-11-25

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19830808

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LINDBLAD, STIG KARL-GUNNAR