EP1069268A1 - Mécanisme de verrouillage - Google Patents

Mécanisme de verrouillage Download PDF

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Publication number
EP1069268A1
EP1069268A1 EP00306054A EP00306054A EP1069268A1 EP 1069268 A1 EP1069268 A1 EP 1069268A1 EP 00306054 A EP00306054 A EP 00306054A EP 00306054 A EP00306054 A EP 00306054A EP 1069268 A1 EP1069268 A1 EP 1069268A1
Authority
EP
European Patent Office
Prior art keywords
latch
latch mechanism
pawl
back plate
engagement member
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Withdrawn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
EP00306054A
Other languages
German (de)
English (en)
Inventor
Sidney Edward Fisher
Nigel Victor Spurr
Timothy Bland
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.)
ArvinMeritor Light Vehicle Systems UK Ltd
Original Assignee
Meritor Light Vehicle Systems UK Ltd
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 Meritor Light Vehicle Systems UK Ltd filed Critical Meritor Light Vehicle Systems UK Ltd
Publication of EP1069268A1 publication Critical patent/EP1069268A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B77/00—Vehicle locks characterised by special functions or purposes
    • E05B77/02—Vehicle locks characterised by special functions or purposes for accident situations
    • E05B77/10—Allowing opening in case of deformed bodywork, e.g. by preventing deformation of lock parts
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B77/00—Vehicle locks characterised by special functions or purposes
    • E05B77/02—Vehicle locks characterised by special functions or purposes for accident situations
    • E05B77/04—Preventing unwanted lock actuation, e.g. unlatching, at the moment of collision
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B85/00—Details of vehicle locks not provided for in groups E05B77/00 - E05B83/00
    • E05B85/02—Lock casings

Definitions

  • the present invention relates to latch assemblies and in particular to latch assemblies for releasably securing vehicle doors when such doors are in a closed position.
  • a typical vehicle door latch mechanism essentially comprises a rotatable claw mounted on the vehicle door which co-operates with a striker pin mounted on the vehicle body.
  • the action of closing the door causes the claw to rotate to a closed position whereupon it engages and retains the striker pin.
  • the claw is maintained in the closed position by a sprung pawl which abuts an appropriately shaped portion of the claw.
  • forces experienced by the latch mechanism can lead to relative movement between the claw and pawl, with the result that the two become misaligned and the pawl no longer maintains the claw in the closed position.
  • the present invention seeks to provide a latch mechanism which is less likely to unlatch during an accident.
  • a latch mechanism having a latch bolt for releasably securing a striker in a closed position, the latch bolt being movably mounted on a chassis of the latch mechanism, and a pawl movably mounted on the chassis and engaging the latch bolt to releasably secure it in a closed position, the chassis including a retention plate and a back plate provided on opposing sides of the pawl and latch bolt, wherein an engagement member is provided on the back plate for retaining the pawl in engagement with the latch bolt following the application of an abnormal load to the latch mechanism.
  • the engagement member may comprise a punched or folded tab of the back plate.
  • the engagement member may comprises a member attached to the back plate.
  • the back plate may be provided with a single engagement member which is configured so as to engage the pawl, the latch bolt or both.
  • the back plate may be provided with a one or more engagement members for the pawl and latch bolt.
  • the mechanism 10 includes a pawl 12, a latch bolt in the form of a claw 14, a retention plate 16 and a back plate 34.
  • the pawl 12 is pivotally mounted via a pivot 20 which is connected to the retention plate 16. in the embodiment shown the pawl pivot 20 is defined by a pin extending between the retention and back plates 16,34
  • the pawl 12 includes a pawl engagement portion 22.
  • the retention plate 16 in conjunction with further components of the latch mechanism 10 (not shown) which do not move relative to the retention plate 16 during use, form a chassis of the latch mechanism.
  • the claw 14 is pivotally mounted on a claw pivot 24 which is secured to the retention plate 16.
  • the claw pivot is defined by a pin extending between the retention and back plates 16,34
  • the claw 14 includes a claw jaw 26 and a claw closed engagement portion 28 and a claw first safety engagement portion 30.
  • the retention plate 16 includes a mouth 32.
  • the claw jaw 26 releasably secures a striker (not shown) in the mouth 32 of the retention plate 16.
  • the claw 14 can be secured in its closed position, as shown in figure 1, by the pawl 12, and in particular by abutment of the pawl engagement portion 22 with the claw closed engagement portion 28.
  • a latch transmission arrangement allows the pawl 12 to be rotated anticlockwise when viewing figure 1 to disengage the pawl engagement portion 22 from the claw closed engagement portion 28, to allow the claw 14 to rotate in an anticlockwise direction and thus release the striker form the mouth 32.
  • the latch transmission arrangement typically would be connected to one or more of an inside door handle, an outside door handle, a sill button and a key barrel in order that the various locking and unlatching functions of the latch mechanism can be achieved.
  • a sill button typically would be situated between the plane of the pawl and claw and the back plate.
  • the latch transmission arrangement includes levers, such levers can be pivoted about the same axis as the pawl or claw (see below).
  • the pawl 12 and claw 14 are substantially planar having respective first planar sides 12A and 14A, and second planar sides 12B and 14B.
  • the retention plate 16 is positioned on the respective first sides 12A, 14A of the pawl 12 and claw 14.
  • the pawl 12 and claw 14 are pivotable about respective pivot axes 12C and 14C which, in the embodiment shown, are substantially parallel.
  • the retention plate 16 Under abnormal conditions, such as when the latch mechanism is secured in a door of a vehicle and the door receives a side impact during a road traffic accident, the retention plate 16 can be distorted with the result that the alignment pivot axes 12C and 14C changes. This can lead to the pawl engagement portion becoming misaligned with the claw closed engagement portion 28, and thereby allowing the door to open.
  • the latch mechanism 10 is provided with an engagement portion 36 extending from the back plate 34 towards the pawl 12 and claw 14.
  • the engagement portion 36 is in the form of a tab which is folded substantially perpendicular to the rest of the of the back plate. The tab extends towards and, when viewing figure 1, overlies portions of both the pawl 12 and claw 14.
  • the engagement portion may formed by a separate member secured to the inner face 38 of the back plate, and separate engagement members may be provided for both the pawl 12 and claw 14.

Landscapes

  • Lock And Its Accessories (AREA)
EP00306054A 1999-07-16 2000-07-17 Mécanisme de verrouillage Withdrawn EP1069268A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9916633 1999-07-16
GBGB9916633.2A GB9916633D0 (en) 1999-07-16 1999-07-16 Latch mechanism

Publications (1)

Publication Number Publication Date
EP1069268A1 true EP1069268A1 (fr) 2001-01-17

Family

ID=10857307

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00306054A Withdrawn EP1069268A1 (fr) 1999-07-16 2000-07-17 Mécanisme de verrouillage

Country Status (2)

Country Link
EP (1) EP1069268A1 (fr)
GB (1) GB9916633D0 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004074607A2 (fr) * 2003-02-21 2004-09-02 Intier Automotive Closures Inc. Ensemble de fermeture de capot
WO2004101923A1 (fr) * 2003-05-08 2004-11-25 Kiekert Aktiengesellschaft Fermeture de porte de vehicule

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4896907A (en) * 1986-11-18 1990-01-30 Ohi Seisakusho Co., Ltd. Locking device for a vehicle
US5860683A (en) * 1995-06-09 1999-01-19 Ohi Seisakusho Co., Ltd. Automotive door lock device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4896907A (en) * 1986-11-18 1990-01-30 Ohi Seisakusho Co., Ltd. Locking device for a vehicle
US5860683A (en) * 1995-06-09 1999-01-19 Ohi Seisakusho Co., Ltd. Automotive door lock device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004074607A2 (fr) * 2003-02-21 2004-09-02 Intier Automotive Closures Inc. Ensemble de fermeture de capot
WO2004074607A3 (fr) * 2003-02-21 2004-10-21 Intier Automotive Closures Inc Ensemble de fermeture de capot
WO2004101923A1 (fr) * 2003-05-08 2004-11-25 Kiekert Aktiengesellschaft Fermeture de porte de vehicule

Also Published As

Publication number Publication date
GB9916633D0 (en) 1999-09-15

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