EP1138855A2 - Entsperrungsmechanismus für ein Fahrzeugschloss - Google Patents

Entsperrungsmechanismus für ein Fahrzeugschloss Download PDF

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Publication number
EP1138855A2
EP1138855A2 EP01201008A EP01201008A EP1138855A2 EP 1138855 A2 EP1138855 A2 EP 1138855A2 EP 01201008 A EP01201008 A EP 01201008A EP 01201008 A EP01201008 A EP 01201008A EP 1138855 A2 EP1138855 A2 EP 1138855A2
Authority
EP
European Patent Office
Prior art keywords
lever
detent
locking lever
bolt
cam surface
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Withdrawn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
EP01201008A
Other languages
English (en)
French (fr)
Other versions
EP1138855A3 (de
Inventor
Allison L. Guetzkow
Charles H. Lee
Donald M. Perkins
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Publication of EP1138855A2 publication Critical patent/EP1138855A2/de
Publication of EP1138855A3 publication Critical patent/EP1138855A3/de
Withdrawn legal-status Critical Current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
    • E05B85/00—Details of vehicle locks not provided for in groups E05B77/00 - E05B83/00
    • E05B85/20—Bolts or detents
    • E05B85/24—Bolts rotating about an axis
    • E05B85/243—Bolts rotating about an axis with a bifurcated bolt
    • 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
    • E05B77/14—Specially controlled locking actions in case of open doors or in case of doors moved from an open to a closed position, e.g. lock-out prevention or self-cancelling
    • E05B77/18—Keyless locking with self-cancellation, e.g. resulting in an unlocking action when the door is being closed

Definitions

  • This invention relates generally to a vehicle door latch and more particularly to a vehicle door latch that has a lock that prevents the vehicle door from being unlatched by an outside door handle when engaged and that disengages the lock when the door is closed.
  • An automotive closure such as a door for an automobile passenger compartment, is hinged to swing between open and closed positions and conventionally includes a door latch that is housed between inner and outer panels of the door.
  • the door latch functions in a well known manner to latch the door when it is closed and to lock the door in the closed position or to unlock and unlatch the door so that the door can be opened manually.
  • the door latch is operated remotely from inside the passenger compartment by two distinct operators - a sill button or electric switch that controls the locking function and a handle that controls the latching function.
  • the door latch is also operated remotely from the exterior of the automobile by a handle or push button that controls the latching function.
  • a second distinct exterior operator such as a key lock cylinder, may also be provided to control the locking function, particularly in the case of a front vehicle door.
  • Each operator is accessible outside the door structure and extends into the door structure where it is operatively connected to the door latch mechanism by a cable actuator assembly or linkage system located inside the door structure.
  • U.S. Patent 5,277,461 granted to Thomas A. Dzurko et al, January 11, 1997 for a vehicle door latch which is hereby incorporated in this patent specification by reference, discloses a typical door latch.
  • the door latch disclosed in the Dzurko '461 patent includes and inside latch operating lever that is pivotally mounted on a flange of a metal faceplate and that is connected by a suitable linkage for rotation by an inside door handle (not shown). See column 4, lines 10-18 of the Dzurko '461 patent.
  • the door latch also includes an inside lock operating lever that is pivotally mounted on the flange of the metal faceplate near the inside latch operating lever. The inside lock operating lever is operated by an inside sill button or lock slide.
  • the door latch disclosed in the Dzurko '461 patent is released from the passenger compartment in two stages. First the inside lock operating lever is rotated counter-clockwise by an inside sill button or lock slide to unlock the door latch. Then the inside latch operating lever 56 is rotated clockwise by an inside door handle to unlatch the door latch so that the vehicle door may be opened manually.
  • Door latches of the type disclosed in the Dzurko '461 patent have been used successfully by General Motors Corporation for many years. While these door locks are useful for many purposes, there are instances where it is desirable to prevent inadvertent locking of the vehicle door with the vehicle keys left in the ignition or elsewhere in the vehicle.
  • the vehicle door latch has a housing.
  • a forked bolt is journalled in the housing and is pivotal between a bolt closed position and a bolt open position.
  • a detent is journalled on the housing and is pivotable into engagement with the forked bolt to latch the forked bolt in the bolt closed position.
  • An unlatching lever is pivotally attached to the housing for pivotal movement between a latched position and an unlatched position.
  • a locking lever with a slot is pivotally attached to the housing for pivotal movement between a locking lever locked position and a locking lever unlocked position.
  • An intermittent lever, with a tab and an intermittent lever cam surface, is pivotally attached to the detent. A pivot pin on the intermittent lever is received in the slot in the locking lever.
  • the tab is in the path of movement of the unlatching lever when the locking lever is in the locking lever unlocked position.
  • the tab is out of the path of movement of the unlatching lever when the locking lever is in the locking lever locked position.
  • the modified fork bolt, intermittent lever and unlatching lever cooperate with the detent to move the locking lever to the locking lever unlocked position upon closing of a vehicle door thereby preventing a latch from being unintentionally locked when the door is closed.
  • the vehicle door can be locked with a key or other outside locking device after the vehicle door is closed.
  • the vehicle door can be intentionally locked without a key by moving the locking lever to the locking lever locked position when the door is open, holding the unlatching lever in an unlatched position and closing the door. Holding the unlatching lever in an unlatched position holds the unlatching lever cam surface out of contact with the intermittent lever cam surface during closing of the door. Holding the unlatching lever cam surface out of contact with the intermittent lever cam surface during closing of the door prevents the locking lever from being moved to the locking lever unlocked position.
  • the vehicle door latch 10 has a multi-piece enclosure that comprises a plastic housing 12, a metal faceplate 14 and a metal back plate 16.
  • the plastic housing 12 and the metal back plate 16 are held together by three flanged, internally threaded bushings 18, 20 and 22 that are inserted into three holes in the plastic housing 12, then through three aligned holes in the back plate 16 and then flanged over the back plate.
  • the metal faceplate 14 has three bolt holes 24 that are aligned with the bushings 18, 20 and 22 when the metal faceplate is attached to the plastic housing 12 by a screw 26.
  • the metal faceplate 14 and the metal back plate 16 have lower portions below the plastic housing 12 that are held together by a flanged stud 28 that has projecting pins at each end that are inserted in holes in the plates and peened or headed over.
  • the latch mechanism of the vehicle door latch 10 comprises a fork bolt 30 and a cooperating detent 32 that are pivotally mounted on bushings 20 and 18 respectively and located in a chamber of the plastic housing 12 behind the metal faceplate 14.
  • the fork bolt 30 is biased clockwise, toward an unlatched position, by a coil spring 29.
  • Coil spring 29 is disposed in a curved slot in the plastic housing 12 behind the fork bolt 30 and it engages a depending spring abutment block 31 of the fork bolt 30 at one end.
  • Detent 32 is biased counterclockwise into engagement with the fork bolt 30 by a coil spring 33 that surrounds the bushing 18 and that has one end engaging an ear 35 of the detent 32.
  • Detent 32 engages shoulder 60 and holds the fork bolt lever 30 in a primary latched position against the bias of spring 29 as shown in figure 1. Detent 32 also can engage fork bolt 30 at shoulder 62 and hold it in an intermediate secondary latched position. Detent 32 engages the fork bolt 30 on its foot 64 in its unlatched position.
  • the latch mechanism further comprises an intermittent lever 34 for operating detent 32.
  • Intermittent lever 34 is located in the chamber of the plastic housing 12 behind detent 32. It has two integral pivot pins 36 and 38.
  • Pivot pin 36 is journalled in a hole 32a in detent 32 so that the detent 32 rotates clockwise from the latched position shown in figure 1 (and out of latched engagement with the fork bolt 30) to an unlatched position when the intermittent lever 34 is pulled down.
  • the pivot pin 38 is disposed in a slot 41 of a locking lever 40 that pivots the intermittent lever 34 counterclockwise about pivot pin 36 from the unlock position shown in figure 1 to a lock position in figure 3.
  • the locking lever 40 is journalled on the stud 28 between flange 42 and faceplate 14.
  • locking lever 40 is rotated clockwise to lock the door latch 10 or counterclockwise to unlock the door latch. Clockwise rotation of the locking lever 40 from the unlocked position shown in figure 1, pivots intermittent lever 34 counterclockwise about pivot pin 36 to a position where it is uncoupled from and out of the path of travel of transfer or unlatching lever 44 described below. A more complete description of the locking lever 40 and locking mechanism is given after the latch mechanism is described.
  • the latch mechanism further comprises a transfer or unlatching lever 44 that is journalled on a reduced diameter portion of the stud 28 spaced rearwardly of the flange 42.
  • the transfer lever 44 has an ear 46 at one end that is engageable with an integral, rearwardly projecting tab 48 of the intermittent lever 34 so that the intermittent lever 34 is pulled down when the transfer level 44 is rotated clockwise as viewed in figure 1.
  • the latch mechanism further comprises an outside latch operating lever 50 and a coil return spring 52.
  • the outside latch operating lever 50 is also journalled on the reduce diameter portion of the stud 28 behind transfer level 44. It has a bent tab 54 that engages ear 46 of the unlatching lever 44 when it is rotated clockwise on the stud 28.
  • Outside latch operating lever 50 has an aperture 51 that is connected by suitable linkage for rotation by an outside door handle (not shown).
  • the coil return spring 52 is disposed around the stud 28 and located between the flange 42 and the unlatching lever 44. One end of the coil spring 52 engages the bottom of transfer lever 44 and the other end engages the bottom of the plastic housing 12 above transfer lever 44 so that transfer lever 44 and outside operating lever 50 are biased counterclockwise to a rest position where tab 54 engages a stop at the bottom of plastic housing 12.
  • the latch mechanism further comprises an inside latch-operating lever 56 that is pivotally mounted on a flange 15 of the metal faceplate 14.
  • the inside latch operating lever 56 has a tab 57 that engages a second ear 61 of transfer lever 44 so that the inside latch operating lever 56 also rotates the transfer lever 44 clockwise when it is rotated counterclockwise.
  • the inside latch operating lever 56 is connected to a suitable cable actuator assembly or linkage system (not shown) for rotation by an inside door handle or other operator (not shown).
  • Fork bolt 30 has a conventional slot or throat 58 for receiving and retaining striker pin 91 of a striker assembly 93 that is attached to the vehicle door pillar to latch the vehicle door in the closed position (not shown).
  • Fork bolt 30 also includes a primary latch shoulder 60, an intermediate secondary latch shoulder 62 and a radially projecting foot 64.
  • Fork bolt 30 preferably has a plastic coating that covers a surface of the slot 58 that is engaged by a striker pin 91 for energy absorption and quiet operation when the vehicle door is slammed shut.
  • Detent 32 has a sector shaped catch 68 that engages the radially projecting foot 64 when the fork bolt 30 is in the unlatched position (not shown).
  • the sector shaped catch 68 positively engages the primary and latch shoulders 60 and 62 to hold the fork bolt 30 in either the primary or the intermediate secondary latched positions shown in figure 1 and not shown, respectively.
  • Detent 32 also preferably includes a plastic coating that has an integral bumper. The bumper engages the bushing 22 to stop counterclockwise pivoting of the detent lever 32 under the bias of spring 33. This bumper also absorbs energy and quiets operation when the door is slammed shut.
  • the latch mechanism described above operates as follows. When the door latch 10 is in an unlatched and unlocked condition, for bolt 30 is poised to receive striker pin 91 that projects into aligned fish mouth slots 74 and 75 of plastic housing 12 and metal faceplate 14 when the door is shut. The entering striker pin 91 engages the back of the throat 58 and rotates fork bolt 30 counterclockwise against the bias of spring 29 until fork bolt 30 is rotated to the primary latch position shown in figure 1 where fork bolt 30 captures the striker pin 91 in the throat 58. Fork bolt 30 is held in the primary latch position by catch 68 of detent 32 engaging the primary latch shoulder 60 of fork bolt 30.
  • Catch 68 rides along the periphery of the fork bolt 30 under the bias of spring 33 as fork bolt 30 rotates counterclockwise from the unlatched position to the primary latch position shown in figure 1. During this travel, catch 68 rides under the foot 64 into engagement with the intermediate secondary latch shoulder 62 and then into engagement with primary latch shoulder 60. Engagement of catch 68 with the intermediate secondary latching shoulder 62 is sufficient to hold the vehicle door closed in the event that the vehicle door is not shut with sufficient force so that catch 68 engages primary latch shoulder 60.
  • the vehicle door latch 10 is not locked and the inside latch operating assembly 56 is not disabled by the security lock so that the vehicle door can be opened simply by operating either an inside or outside door handle or the like to rotate the unlatching lever 44 clockwise and the ear 46 down as viewed in figure 1.
  • Ear 46 engages projection 48 of intermittent lever 34 and pulls the intermittent lever 34 down from the primary latch position shown in figure 1.
  • Fork bolt 30 is then free to rotate counterclockwise under the bias of spring 29 from the primary latch position shown in figure 1 to an unlatched position as the striker pin 91 is pulled out of the aligned fish mouth slots 74 and 75 when the vehicle door is opened.
  • the lock mechanism is actuated by rotating the locking lever 40 that is journalled on stud 28 between flange 42 and faceplate 14 clockwise. Clockwise rotation of the locking lever 40 rotates intermittent lever 34 counterclockwise about the pivot pin 36 that is journalled in the detent 32 due to the engagement of the second pivot pin 38 of the intermittent lever 34 in slot 41 of locking lever 40. Intermittent lever 34 is thus rotated counterclockwise from the unlocked position shown in figure 1 to an unlocked position where tab 48 is repositioned out from under ear 46 of unlatching lever 44. Consequently when the door handles or the like are operated so as to rotate the transfer level 44 clockwise to the unlatching position, ear 46 simply bypasses tab 48 without transferring any motion to intermittent lever 34. Intermittent lever 34 is not therefore pulled down to rotate detent 32 to the unlatch position. In other words the transfer lever 44 simply free wheels so that operation of the door handles or their equivalent is not effective.
  • the lock mechanism further comprises an inside lock operating lever 80 and an optional outside lock-operating lever 82.
  • Inside lock operating lever 80 is pivotally mounted on flange 15 of the metal faceplate 14 at a location spaced from the pivot for the inside latch operating lever 56.
  • Inside lock operating lever 80 has an ear 84 that fits in a slot 85 at one end of locking lever 40.
  • Locking lever 40 has a protuberance 88 that projects through a sector shaped hole 86 in outside lock operating lever 82 and then through a smaller sector shaped hole 90 in faceplate 14.
  • Protuberance 88 and sector shaped hole 90 limit rotation of locking lever 40 from an unlocked position shown in figure 1 where protuberance 88 engages the upper edge of hole 90 to a locked position (not shown) where protuberance 88 engages the lower edge of hole 90.
  • Locking lever 40 is rotated clockwise from the unlocked position shown in figure 1 to the locked position by rotating inside lock operating lever 80 counterclockwise as viewed in figure 1.
  • Inside lock operating lever 80 is actuated by a suitable actuator assembly or linkage system (not shown) by an inside sill button or other operator (not shown).
  • Locking lever 40 can also be rotated clockwise from the unlocked position shown in figure 1 to the locked position by rotating outside lock operating lever 82 clockwise.
  • Outside lock operating lever 82 is optional and normally used only in front vehicle doors where the lock operating lever 82 is generally actuated by a key lock cylinder through a suitable linkage (not shown).
  • Locking lever 40 also has a slot 87 for operating the locking lever 40 by a linear electric or vacuum motor.
  • An undogging mechanism 100 unlocks the lock mechanism when the door is closed and the locking lever 40 is in a locking position.
  • the purpose of the undogging mechanism 100 is to prevent the inadvertent locking of a vehicle with the keys inside the passenger compartment. However, a person can override the undogging mechanism 100 and lock the doors without a key if desired as explained below.
  • the undogging mechanism 100 includes fork bolt 30, intermittent lever 34 and transfer or unlatching lever 44 that are as shown in detail figures 2A, 2B and 2C respectively.
  • Fork bolt 30 has a foot 50 with a radially outer cam surface 152 having a radius about the axis of the bushing 20 that increases from the heel 154 to the toe 156.
  • Intermittent lever 34 has a cam follower 160 on the side opposite the pivot pin 38.
  • Unlatching lever 34 has a straight inclined cam surface 162.
  • the door latch 10 as shown in figure 3 has back plate 16, housing 14 and spring 29 removed for clarity.
  • the fork bolt 30 is in the unlatched position where a stop surface 164 on fork bolt 30 is in contact with the housing 12 (not shown).
  • the locking lever 40 is in a locked position.
  • the pivot pin 38 on intermittent lever 34 which projects into the slot 41 on the locking lever 40, locates intermittent lever 34 in a lock position where tab 48 on intermittent lever 34 is out of the path of movement of ear 46 on unlatching lever 44.
  • the pivot pin 36 is journalled in a hole 32a in the detent 32.
  • the unlatched and locked position of the parts described above occurs when the door is open and the lock mechanism has been actuated for instance by a pushing conventional sill button down.
  • the undogging mechanism 100 automatically unlocks door latch 10 when the door is closed to avoid an inadvertent lock-out. Closing the door moves the fork bolt 30 into contact with the striker pin 91.
  • the striker pin 91 rotates the fork bolt 30 clockwise as shown in figure 3 from the unlatched position shown in figure 3 to the secondary latched position shown in figure 5 through the mid position shown in figure 4.
  • Rotation of fork bolt 30 also rotates detent 32 counterclockwise about bushing 18.
  • the detent 32 is rotated counterclockwise by cam surface 152 on fork bolt 30. Rotation of the detent 32 counterclockwise moves the pivot pin 36 and intermittent lever 34 downward and moves the pivot pin 38 (shown in figure 1) on intermittent lever 34 downward in slot 41 of locking lever 40.
  • the locking lever 40 is pivotally mounted on the flanged stud 28 as shown in figure 1.
  • a coil spring 170 is mounted on a stud 172 that is integral with the housing 12.
  • the coil spring 170 has one end that is anchored on the housing and an end 174 that is received in a slot 176 or a slot 178 in the locking lever 40.
  • the tab 48 is out of the path of movement of the unlatching lever 44 and the door 10 is locked.
  • the end 174 of the spring 170 is in the slot 178 the tab 48 is in the path of movement of the unlatching lever 144 and the latch 10 is unlocked.
  • the slots 176 and 178 are separated from each other by a tip 180. Rotating the locking lever 140 a few degrees about the flanged stud 28 in one direction or the other cams the end 174 of spring 170 up one side of the tip 180 and into the other slot 176 or 178.
  • the door latch 10 as shown in figure 5 is in a secondary latched and unlocked position.
  • the shoulder 60 In the fully latched position, the shoulder 60 is engaged by a locking surface 182 of the catch 68 on the detent 32.
  • the shoulder 62 at the toe 156 of foot 150 In secondary latched position the shoulder 62 at the toe 156 of foot 150 is in engagement with the locking surface 182 on the detent 32 thereby holding the forked bolt 130 in a secondary latched position. Since the unlocking lever 40 is in an unlocked position, the tab 48 on intermittent lever 34 is in the path of movement of ear 46 on unlatching lever 44.
  • Movement of the unlatching lever 44 by an inside door handle or by an outside door handle moves ear 46 into engagement with tab 48, moves pivot pin 38 in slot 41 away from bushing 20, moves intermittent lever 34 away from fork bolt 30 and pivots the locking surface 182 on detent 32 out of the path of shoulder 62 of fork bolt 30 thereby unlatching the fork bolt.
  • Locking lever 40 can be rotated to a locked position by various levers and activators. However, closing the door after the locking lever 40 has been rotated to a locked position automatically results in clockwise rotation of fork bolt 30 and rotation of locking lever 40 to the unlocked position by the undogging mechanism as explained above. However, the undogging mechanism can be overridden. For instance, if the operator of a vehicle wishes to lock an open door without a key, locking lever 40 is rotated to a locked position by the sill button or the like while fork bolt 30 remains in the unlatched position as shown in figure 3. The outside door handle is then moved to an open position rotating unlatching lever 44 counterclockwise about the flanged stud 28 as shown in figure 3.

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  • Lock And Its Accessories (AREA)
EP01201008A 2000-03-31 2001-03-19 Entsperrungsmechanismus für ein Fahrzeugschloss Withdrawn EP1138855A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54035300A 2000-03-31 2000-03-31
US540353 2000-03-31

Publications (2)

Publication Number Publication Date
EP1138855A2 true EP1138855A2 (de) 2001-10-04
EP1138855A3 EP1138855A3 (de) 2003-05-14

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Application Number Title Priority Date Filing Date
EP01201008A Withdrawn EP1138855A3 (de) 2000-03-31 2001-03-19 Entsperrungsmechanismus für ein Fahrzeugschloss

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110116433A (zh) * 2019-05-29 2019-08-13 唐山先锋印刷机械有限公司 一种模切机间歇运动部件控制机构
CN110116433B (zh) * 2019-05-29 2024-06-04 唐山先锋印刷机械有限公司 一种模切机间歇运动部件控制机构

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5277461A (en) 1992-12-24 1994-01-11 General Motors Corporation Vehicle door latch

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS546227A (en) * 1977-06-15 1979-01-18 Aisin Seiki Co Ltd Automatic door locking device
GB2300875B (en) * 1995-05-13 1998-11-04 Rockwell Body & Chassis Syst Vehicle door latch assembly
JPH11107598A (ja) * 1997-10-01 1999-04-20 Mitsui Mining & Smelting Co Ltd 車両ロック装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5277461A (en) 1992-12-24 1994-01-11 General Motors Corporation Vehicle door latch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110116433A (zh) * 2019-05-29 2019-08-13 唐山先锋印刷机械有限公司 一种模切机间歇运动部件控制机构
CN110116433B (zh) * 2019-05-29 2024-06-04 唐山先锋印刷机械有限公司 一种模切机间歇运动部件控制机构

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