EP1548214A1 - Mécanisme de verrouillage par inertie - Google Patents

Mécanisme de verrouillage par inertie Download PDF

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Publication number
EP1548214A1
EP1548214A1 EP03258142A EP03258142A EP1548214A1 EP 1548214 A1 EP1548214 A1 EP 1548214A1 EP 03258142 A EP03258142 A EP 03258142A EP 03258142 A EP03258142 A EP 03258142A EP 1548214 A1 EP1548214 A1 EP 1548214A1
Authority
EP
European Patent Office
Prior art keywords
locking mechanism
inertia
mechanism according
latch
lever
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Withdrawn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
EP03258142A
Other languages
German (de)
English (en)
Inventor
Morten Ketelsen
John Gorton
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
ArvinMeritor 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 ArvinMeritor Light Vehicle Systems UK Ltd filed Critical ArvinMeritor Light Vehicle Systems UK Ltd
Priority to EP03258142A priority Critical patent/EP1548214A1/fr
Publication of EP1548214A1 publication Critical patent/EP1548214A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • E05B77/06—Preventing unwanted lock actuation, e.g. unlatching, at the moment of collision by means of inertial forces
    • 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

Definitions

  • the present invention relates to an inertia locking mechanism. More particularly, the present invention relates to an inertia locking mechanism that incorporates magnetic biasing for a vehicle operable in response to vehicle acceleration or deceleration to prevent unwanted unlatching of a vehicle door latch.
  • vehicle passenger doors may deform. This deformation may cause components in the linkage from an inside or outside door handle to change their relative positions. This potentially results in an unwanted unlatching of the latch due to, for example, the linkage stretching and thus moving a release lever of the latch. In such a crash or impact situation, unlatching of vehicle passenger doors is undesirable because the latched doors provide a large proportion of the structural integrity of the vehicle, whereas unlatched doors do not. Additionally, the unlatching of a door during an impact increases the risk of vehicle occupants being thrown from the vehicle, leading to an increased risk of injury.
  • the present invention seeks to overcome, or at least mitigate the problems of the prior art.
  • one aspect of the present invention provides an inertia locking mechanism for a vehicle door latch, the mechanism comprising a transmission path normally operable by a door handle to release a latch bolt of a vehicle door latch, the transmission path comprising a component that is arranged to cause a block or break in the transmission path in the event that a vehicle undergoes acceleration above a predetermined lever, the component being magnetically biased and the block or break being arranged to be created when the magnetic biasing is overcome by the acceleration.
  • a second aspect of the present invention provides a door latch mechanism for a vehicle comprising a release lever operable by a door handle, and a transmission path linkage comprising a inertia body arranged in normal operation to transmit unlatching movement from the release lever to release a latch bolt of the latch, wherein, in the event that the vehicle undergoes acceleration above a predetermined level, the inertia of said body in the latch mechanism causes a block or break to be created in the transmission linkage, the inertia body being biased into its normal operating position by a magnet.
  • a latch 11 is mounted to a vehicle side passenger door 90 at the intersection of a shut face 91 (at the door trailing edge) and inside face 92 thereof. A portion of the door is cut away to provide an opening 93 spanning the intersection, the opening being capable of receiving a striker (not shown) mounted to a fixed portion of the vehicle such as a door pillar (not shown).
  • a similarly dimensioned opening 94 is also provided in a chassis 12 of the latch 11.
  • An outside release lever 14 of the latch 11 is connected to an outside handle 20 of the door 90 by a linkage 21.
  • a latch bolt in the form of a rotatable claw 95 (also partially visible in Figure 15) is pivotally mounted to an inner face of the of a chassis 12 by a pivot pin, and is arranged to receive the striker in a mouth 96 thereof.
  • the claw 95 is shown in a released state.
  • the claw 95 is biased into an open position by resilient means such as a spring (not shown).
  • the claw 95 may be retained by a latch pawl 97 by engagement of a pawl tooth 97a thereof with either a first safety abutment 95a or fully latched abutment 95b on a periphery of the claw 95.
  • the latching pawl 97 is pivotally mounted about a second pivot pin 89 and is resiliently biased by a spring 98 into contact with the claw 95, as is known.
  • a cover plate 99 has been placed on the latch so as to partially obscure claw 95 and totally obscure the latch 97 pawl.
  • the cover plate 99 further shrouds mouth 20 of the retention plate 22 so as to minimise the ingress of dirt etc. into the latch 11 via the mouth.
  • An outside actuating lever 56 is pivotably connected to a release link connector 88 by a pin.
  • Connector 88 extends from a pawl lifter (not shown).
  • the pawl lifter rotates about pin 89 and has a lost motion connection to the pawl 97 to be capable of disengaging the pawl from the claw 95.
  • Inside actuating lever 87 is similarly connected to the pawl lifter.
  • the pawl lifter and connector 88 rotate together about pin 89.
  • the pawl lifter is biased in a clockwise direction by a spring (not shown). Rotation of a main lock lever 86 in a clockwise direction causes actuating levers 56 and 87 to rotate clockwise by the action of a cam portion (not visible) of link 86 to move to a locked position.
  • Actuating levers 56 and 87 are biased in an anti-clockwise direction by a spring (not shown) so that when the main lock lever 86 returns to the unlock position, the links 56 and 87 also return to their unlocked position.
  • a mechanism of the latch 11 indicated generally at 10 comprises a number of latch components mounted to another portion of latch chassis 12 to that visible in Figure 15.
  • the mechanism is positioned on top of the cover plate 99 so as to be capable of actuating lever 56.
  • the components comprise the release lever 14 pivotally mounted to the chassis 12 by pin 16 at one end and further having a slotted aperture 18 at its other end for connection to the outside door handle (illustrated schematically at 20 in Figure 1).
  • a limb 22 extends from one side of release lever 14 and has pivotally mounted thereon a catch 24 having a tooth 26.
  • the catch 24 is pivotally mounted about pin 28 and is biased in a clockwise direction as shown in Figure 1.
  • a ramp surface 30 is secured to tooth 26 and projects into the paper when viewed in Figure 1.
  • An inertia pawl 32 is pivotally mounted to release lever 14 via pin 34 positioned intermediate pin 16 and aperture 18.
  • the inertia pawl 32 is biased in an anti-clockwise direction.
  • the pawl comprises a pawl tooth 36 arranged to engage tooth 26 of catch 24 via an end surface 38 of the pawl and an inner surface 40 of catch tooth 26.
  • Pawl tooth 36 further comprises an inner surface 42 and catch tooth 26 further comprises an end surface 44.
  • a fixed projection 46 extends from the chassis 12 and is positioned so as to engage ramp 30 during pivoting motion of the release lever 14, as will be discussed in further detail below.
  • a transmission lever 48 is further pivotally mounted to pin 34 on release lever 14.
  • the transmission lever 48 is rotationally fast with pawl 32 and is therefore also biased in an anti-clockwise direction by biasing means in the form of a permanent magnet 50 that is arranged to attract a magnetic portion of the transmission lever.
  • An abutment surface 52 is provided at the end of lever 48 remote from pin 34 such that in normal operation the abutment surface may contact a corresponding abutment surface 54 of an actuating lever 56, when the actuating lever is in an unlocked position as shown in Figure 17. It will be appreciated that when fitted to the trailing edge of a vehicle side passenger door as shown in Figure 1, the pivotal axis of transmission lever 48 is substantially parallel to the longitudinal (i.e. front to rear) axis of the vehicle and vehicle door and the axis about which claw 95 and latch pawl 97 rotate.
  • a projection 58 is provided on one face of transmission lever and fits in a slot or recess 60 provided in chassis 12.
  • projection 58 may slide along a linear slot portion 60a, arranged to extend substantially parallel to the longitudinal axis of transmission lever 48.
  • the projection is, of course, biased towards the upper surface of slot portion 60a by magnet 50.
  • projection 58 may also move along arcuate slot portion 60b as transmission lever 48 pivots about pin 34 to come to rest in the position shown in Figure 2. Thereafter, projection 58 may move to the positions shown in Figures 4 and 5 so as to come to rest along the abutment surface 62 which extends substantially parallel to slot portion 60a. It should be noted that with pin 58 at rest along abutment surface 62, abutment surface 52 of the transmission lever 48 cannot contact abutment surface 54 of actuating lever 56.
  • the latch Under normal operating conditions starting with the latch in a latched, unlocked condition, the latch operates as follows:
  • a subsequent pull on the outside door handle then enables the latch mechanism 10 to be released in the normal way, with abutment surface 52 contacting abutment surface 56.
  • This resetting feature of the transmission linkage enables the latch to be continue to be used in the normal way after an impact. In particular, it enables the door to be opened to enable emergency personnel to enter the vehicle in the event that the vehicle occupants are injured in the impact (assuming that this is not prevented by excessive deformation of the door to which the latch is fitted).
  • the inertia body 170 is biased in an anti-clockwise direction by a spring or magnet (not shown) and is shown in its rest position in Figure 6.
  • An upper surface 176 of the body 170 defines, together with the upper surface of slot 160 what is effectively an elongate slot portion 160a equivalent to slot portion 60a of the first embodiment.
  • projection 158 tends to contact surface 176 of the inertia body 170 during movement along slot portion 160a.
  • Inertia body 170 further comprises an inertia mass portion 174 remote from pin 172.
  • inertia body 170 is caused to pivot about pin 172 in a clockwise direction relative to the remainder of the latch. This occurs due to the tendency of the inertia mass portion 174 to remain stationary in the transverse direction, whilst the rest of the vehicle accelerates. In the rest position the spatial relationship between surface 176, projection 158, pin 172 and the slot 160 is such that the inertia mass may rotate without fouling on the projection 158.
  • the transmission lever rotates in a clockwise direction X under the influence of magnet 150 to come to rest in the position shown in Figure 7. Once the acceleration has ceased, inertia mass 170 rotates anti-clockwise to return to its rest position under the influence of its biasing.
  • FIGS 10 and 11 illustrate a third embodiment of the present invention in which like parts have again been designated by like numerals, but with the addition of the prefix "2". Again, only the differences between this embodiment and the first two embodiments are discussed in detail.
  • the inertia body 270 is caused to rotate in a clockwise direction in a similar manner to the body 170 of second embodiment. This causes projection 258 to leave notch 280 and slide in a direction of X 2 to attain the position shown in Figure 11. Once the deceleration due to the impact has ceased, the projection is maintained in this position due to an equilibrium of the anti-clockwise biasing force acting on release lever 214, clockwise biasing force acting on the transmission lever 248 due to magnet 250, the anti-clockwise biasing force acting on the inertia body 274 due to torsion spring 284, and the frictional resistance between projection 258 and surface 282 of body 270.
  • a subsequent pull on outside door handle 220 causes inertia member 270 to rotate in a clockwise direction until the frictional resistance between projection 148 and surface 282 and the biasing force of magnet 250 is overcome, so that the projection slides back into notch 280.
  • abutment surface 252 misses abutment surface 254. Only once the outside door handle is released, to return transmission linkage back to the rest position shown in Figure 10 will a further pull on outside door handle lead to the unlatching of the latch 210.
  • FIGS 12, 13 and 14 illustrate a fourth embodiment of the present invention in which like parts have been designated by like numerals, but with the addition of the prefix "3". Only differences between this embodiment and the preceding embodiments are discussed in detail.
  • slot 360 has a U-shaped configuration with spaced substantially parallel linear slot portions 360a and 362 joined by a transverse slot portion 360b.
  • the slot configuration is similar to that of the first embodiment except that the transverse portion 360b is angled towards linear slot portion 362 so as to promote pin 358 entering portion 362 if lever 348 pivots from its rest position.
  • a permanent magnet 350 is provided to urge pin 358 into slot 360a.
  • the pawl and catch mechanism of the first embodiment is dispensed with.
  • lever 348 pivots clockwise in portion 360b of the slot as shown in Figure 13. If there is a simultaneous or near-simultaneous deformation of the door at this point which causes release lever 314 to pivot anti-clockwise, pin 358 slides in slot portion 362 as shown in Figure 14 such that the end 352 of lever 348 misses abutment surface 354 of actuating lever 356, preventing the latch from releasing.
  • lever 314 normally returns to its rest position under the influence of magnet 350, freeing pin 358 and transmission lever 348 to pivot anti-clockwise back to the rest position shown in Figure 12, so that subsequent pulls on the outside door handle 320 will release the latch.
  • the moment provided by the magnet in this embodiment is approximately 15 Nmm when the transmission lever 348 is in its rest position, and approximately 9.5 Nmm when the lever is in its locked position in slot 362.
  • the strength of the magnet and arrangement of the magnet and the levers may be adjusted to provide particular biasing characteristics.
  • FIG. 14A A fifth embodiment of the present invention is shown in Figure 14A which is the same as the fourth embodiment except that second linear slot 362 is omitted.
  • lever 448 pivots clockwise.
  • any pivoting of release lever 414 is blocked by abutment surface 463, also ensuring that the latch is not released.
  • Figure 14A shows the actuating lever in a locked position at which inertia lever 448 is incapable of contacting surface 454 to release the latch.
  • magnets to provide the biasing of the lever or inertia body has been found to be particularly effective since reliability may be improved over an extended period of time. This is because magnets do not generally suffer from corrosion, fatigue and the effects of dirt ingress to the same extent as conventional springs.
  • lever 48, 348, 448 or inertia body 170, 270 may be adjusted according to the particular characteristics required by altering the mass or length of the lever arm.
  • Interchangeable masses may be attached to the lever 48, 348, 448 or inertia body 170, 270 to achieve this. Such masses may also be provided as the ferrous material to be attracted by the magnet.
  • a magnet may alternatively be provided on the transmission lever or inertia body, rather that fixed to the latch chassis.
  • Magnets may be provided on both the chassis and the transmission lever/inertia body to repulse each other. Electromagnets may be used rather than permanent magnets. Additionally, components may be provided to block the transmission path, rather than provide a break. Furthermore, a similar arrangement may be used to provide such a block or break in the transmission path from the inside door handle to the latch bolt, although in normal circumstances it is less likely for deformations of the door in an impact to cause unlatching by virtue of the movement of the inside door handle relative to the latch mechanism. In certain circumstances it may not be necessary for the mechanism to be resettable.

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  • Lock And Its Accessories (AREA)
EP03258142A 2003-12-24 2003-12-24 Mécanisme de verrouillage par inertie Withdrawn EP1548214A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03258142A EP1548214A1 (fr) 2003-12-24 2003-12-24 Mécanisme de verrouillage par inertie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03258142A EP1548214A1 (fr) 2003-12-24 2003-12-24 Mécanisme de verrouillage par inertie

Publications (1)

Publication Number Publication Date
EP1548214A1 true EP1548214A1 (fr) 2005-06-29

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EP03258142A Withdrawn EP1548214A1 (fr) 2003-12-24 2003-12-24 Mécanisme de verrouillage par inertie

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2432184A (en) * 2005-11-11 2007-05-16 John Phillip Chevalier Coupling apparatus which decouples in the event of acceleration above a predetermined threshold
WO2008068261A1 (fr) * 2006-12-06 2008-06-12 Valeo S.P.A. Poignée de véhicule munie d'un dispositif de sécurité
EP2053186A1 (fr) * 2007-10-22 2009-04-29 Hyundai Motor Company Dispositif de prévention de déverrouillage de poignée de porte
DE102019118796A1 (de) * 2019-07-11 2021-01-14 Kiekert Aktiengesellschaft Schließvorrichtung für eine Tür oder Klappe eines Kraftfahrzeugs
US20210246692A1 (en) * 2018-07-05 2021-08-12 Kiekert Ag Lock for a motor vehicle
DE102022113035A1 (de) 2022-05-24 2023-11-30 Kiekert Aktiengesellschaft Kraftfahrzeug-Schloss, insbesondere Kraftfahrzeug-Türschloss
DE102022113054A1 (de) 2022-05-24 2023-11-30 Kiekert Aktiengesellschaft Crash Unlock mit Magnet und KSI

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1553411A1 (de) * 1966-09-16 1970-07-16 Artur Mann Sicherheits-Tuergriff
US4326111A (en) * 1978-01-21 1982-04-20 Inertia Switch Limited Inertia switch device
US4381829A (en) * 1979-10-23 1983-05-03 Regie Nationale Des Usines Renault Collision detection system with safety devices
DE4117110C1 (de) * 1991-05-25 1992-12-24 Daimler Benz Ag Auslösemechanik für ein Drehfallenschloss
US5373752A (en) * 1992-08-08 1994-12-20 Kiekert Gmbh & Co. Kg Power actuator for motor-vehicle door latch
DE19912680A1 (de) * 1999-03-20 2000-09-21 Volkswagen Ag Crashgesicherte Verschlußanordnung für eine Fahrzeugtür
EP1355026A2 (fr) * 2002-04-12 2003-10-22 ArvinMeritor Light Vehicle Systems (UK) Ltd Dispositif de verrouillage

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1553411A1 (de) * 1966-09-16 1970-07-16 Artur Mann Sicherheits-Tuergriff
US4326111A (en) * 1978-01-21 1982-04-20 Inertia Switch Limited Inertia switch device
US4381829A (en) * 1979-10-23 1983-05-03 Regie Nationale Des Usines Renault Collision detection system with safety devices
DE4117110C1 (de) * 1991-05-25 1992-12-24 Daimler Benz Ag Auslösemechanik für ein Drehfallenschloss
US5373752A (en) * 1992-08-08 1994-12-20 Kiekert Gmbh & Co. Kg Power actuator for motor-vehicle door latch
DE19912680A1 (de) * 1999-03-20 2000-09-21 Volkswagen Ag Crashgesicherte Verschlußanordnung für eine Fahrzeugtür
EP1355026A2 (fr) * 2002-04-12 2003-10-22 ArvinMeritor Light Vehicle Systems (UK) Ltd Dispositif de verrouillage

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2432184A (en) * 2005-11-11 2007-05-16 John Phillip Chevalier Coupling apparatus which decouples in the event of acceleration above a predetermined threshold
WO2008068261A1 (fr) * 2006-12-06 2008-06-12 Valeo S.P.A. Poignée de véhicule munie d'un dispositif de sécurité
KR101398316B1 (ko) * 2006-12-06 2014-05-23 발레오 에스.피.에이. 안전 장치를 구비한 차량용 손잡이
EP2053186A1 (fr) * 2007-10-22 2009-04-29 Hyundai Motor Company Dispositif de prévention de déverrouillage de poignée de porte
US20210246692A1 (en) * 2018-07-05 2021-08-12 Kiekert Ag Lock for a motor vehicle
DE102019118796A1 (de) * 2019-07-11 2021-01-14 Kiekert Aktiengesellschaft Schließvorrichtung für eine Tür oder Klappe eines Kraftfahrzeugs
DE102022113035A1 (de) 2022-05-24 2023-11-30 Kiekert Aktiengesellschaft Kraftfahrzeug-Schloss, insbesondere Kraftfahrzeug-Türschloss
DE102022113054A1 (de) 2022-05-24 2023-11-30 Kiekert Aktiengesellschaft Crash Unlock mit Magnet und KSI

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