GB2259734A - Vehicle door latch systems - Google Patents
Vehicle door latch systems Download PDFInfo
- Publication number
- GB2259734A GB2259734A GB9119792A GB9119792A GB2259734A GB 2259734 A GB2259734 A GB 2259734A GB 9119792 A GB9119792 A GB 9119792A GB 9119792 A GB9119792 A GB 9119792A GB 2259734 A GB2259734 A GB 2259734A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- vehicle door
- locking
- release
- handle
- 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.)
- Granted
Links
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
- E05B85/10—Handles
- E05B85/12—Inner door handles
-
- 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
- E05B77/22—Functions related to actuation of locks from the passenger compartment of the vehicle
- E05B77/30—Functions related to actuation of locks from the passenger compartment of the vehicle allowing opening by means of an inner door handle, even if the door is locked
Abstract
A vehicle door latch system includes a latch mechanism (10) having a locking lever (14) and a release lever (15), an inside door handle assembly (11) and a connector rod (12) interconnecting the two. The inside handle assembly (11) includes a handle lever (26) which is movable between locking, unlocking and release positions and the connector rod (12) is coupled to the locking and release levers (14 and 15) by means of a moulded plastic coupling member (18) which includes trunnions (22) which engage in slots (23 and 24) in the locking and release levers (14 and 15). <IMAGE>
Description
VEHICLE DOOR LATCH SYSTEMS
Field of the Invention
This invention relates to vehicle door latch systems and, in particular, to means for interconnecting a vehicle door latch with the inside door handle.
As explained in European Patent Specification No.
0169644, conventional vehicle door latch systems have one operating mechanism or actuator for effecting the latching/unlatching function of the latch and a second operating mechanism or actuator for effecting the locking/unlocking function of the latch.
The vehicle door latch system of said European specification is characterised in that the handle means is operatively connected both to the release lever and to the locking lever of the latch mechanism by a single Bowden push/pull control cable.
The inside door handle is then movable, with such a system, outwardly from a normal position to open the vehicle door or inwardly from the normal position to lock the vehicle door.
Such an arrangement has a number of advantages avoiding, as it does, the requirement for a separate sill button for effecting a locking operation.
It is accordingly an object of the present invention to provide an improved vehicle door latch system in which the locking operation can be effected by movement of the inside door handle, but in which the inside door handle is connected to the latch mechanism by a rod connector rather than a cable.
With a vehicle door latch system in which the inside door handle is movable in one direction to open the door and in the opposite direction to lock the door, it is important that, when the inside door handle is in its normal position, it is correctly positioned relative to the housing in which it is mounted.
It is accordingly a further object of the present invention to provide an improved vehicle door latch system which includes means for accurately positioning the inside door handle.
Summary of the Invention
According to a first aspect of the present invention there is provided a vehicle door latch system comprising:
a) a latch mechanism for mounting on the door and including a release lever operable to release the latch mechanism and a locking lever having a locking position in which release of the latch mechanism is prevented and an unlocking position in which release of the latch mechanism is permitted;;
b) an inside door handle for mounting on the vehicle door remote from the latch mechanism, said handle including a handle lever which is movable between locking, unlocking and release positions,
c) a rod connector for connecting the inside door handle to the latch mechanism, and
d) a coupling member carried by the end of the rod connected to the latch mechanism, said coupling member including a portion which engages within slots in the release lever and in the locking lever such that, when the inside handle lever is moved in one direction from its unlocking position, such movement is transmitted to the locking lever whereas, when the inside handle lever is moved in the opposite direction from its unlocking position, such movement is transmitted to the release lever.
Spring means preferably acts between the locking lever and the coupling member, said spring means providing a reaction for unlocking travel of the locking lever.
The arrangement is preferably such that, when the inside handle lever is in either its locking position or its unlocking position, the release lever is located in engagement with an abutment afforded by part of the latch housing.
The coupling member is preferably in the form of a plastic moulding shaped so that it can be fitted on to the end of the rod connector, the rod connector having an end formation bent at right angles to the main portion of the rod connector and the coupling member including a socket within which said end formation is received.
The spring means which acts between the locking lever and the coupling member is ancillary to an over-centre spring which acts on the locking lever and is preferably in the form of a torsion spring which is anchored about the pivot axis for the locking lever and has one leg bearing against a limb of the locking lever and its other leg bearing against the portion of the coupling member located in the slots in the locking and release levers.
The slots in the locking and release levers are preferably arcuate slots centred on the axes of pivotal movement of the two levers with the arcuate length of the slot in the locking lever approximately twice that in the release lever to enable the length of travel of the inside handle lever from its normal or unlocking position into its release position to be approximately twice the length of travel from its normal or unlocking position into its locking position.
According to a second aspect of the present invention there is provided a vehicle door latch system comprising:
a) a latch mechanism for mounting on the door and including a release lever operable to release the latch mechanism and a locking lever having a locking position in which release of the latch mechanism is prevented and an unlocking position in which release of the latch mechanism is permitted,
b) an inside door handle for mounting on the vehicle door remote from the latch mechanism, said handle including a housing and a handle lever which is movable in one angular direction relative to the housing from an unlocking position into a locking position and is movable in the opposite angular direction relative to the housing from the unlocking position into a release position,
c) a rod connector for connecting the inside door handle to the latch mechanism,
d) a bellcrank lever mounted on the door handle housing, the rod connector being connected to one arm of the bellcrank lever, and
e) an adjustable rod interconnecting the other arm of the bellcrank lever and the inside handle lever, said rod being adjustable in length to permit adjustment of the angular location of the inside handle lever when in its unlocking position.
The inside handle housing is preferably in the form of a moulded plastic bowl or dish within which the body of the inside handle lever is located, the handle lever being pressed into the interior of the bowl or dish to move it from its unlocking position into its locking position, and being pulled outwardly of the bowl or dish to move it from its unlocking position into its release position to open the vehicle door.
The bellcrank lever is preferably mounted on the outside of the base of the housing, i.e. on the side of the base within the vehicle door trim, adjacent a corner of the bowl or dish so that the other arm of the bellcrank lever projects beyond the side wall of the moulded plastic bowl or dish to facilitate attachment of the adjustable rod which extends between said other arm and a part of the handle lever. The handle lever is preferably mounted on a pivot mounting carried by, and located externally of, said side wall of the bowl or dish, which side wall is slotted to enable the handle lever to project therethrough.
The door latch system may be supplied to the vehicle manufacturer as a pre-assembled unit, i.e. with the rod connector already connected to both the latch mechanism and the inside door handle. Alternatively, the latch mechanism, rod connector and inside door handle may be supplied to the vehicle manufacturer as separate units which are assembled alongside the vehicle assembly line and then fitted in the vehicle door.
A facility may be provided for locating the bellcrank lever in a predetermined angular position relative to the inside handle housing and for holding it in that position by means of a peg, the length of the adjustable rod being adjusted with the bellcrank lever held in the required position and then the peg removed after fitting of the latch system in the vehicle door.
Brief Description of the Drawings
Figure 1 is a somewhat diagrammatic view of the latch mechanism,
Figure 2 shows the inside door handle which is connected by a rod connector to the latch mechanism,
Figure 3 is a plan view of the latch mechanism, and
Figure 4 is an isometric view of a coupling member for attachment of the rod connector to the latch mechanism.
Description of the Preferred Embodiment
The vehicle door latch system shown in the drawings has been designed for vans and other commercial vehicles and includes a latch mechanism 10, an inside door handle assembly 11 and a wire rod connector 12 which interconnects the handle assembly 11 and the latch mechanism 10. The latch mechanism 10 includes a latch housing 13 of generally conventional form and within which is located a pivotally mounted latch bolt (not shown) arranged for engagement with a keeper to hold the door in the closed position.
The latch mechanism 10 also includes a locking lever 14 and a release lever 15, the two levers 14 and 15 being shown in . .. . . .
Figure 1 in the positions which they occupy when the latch mechanism is in its unlocked position, i.e. the vehicle door is closed but not locked. The locking lever 14 is mounted on the latch housing 13 by means of a pivot pin for pivotal movement relative thereto about an axis 16 and the release lever 15 is likewise mounted on the latch housing 13 by a pivot pin for pivotal movement relative thereto about an axis 17. The functions of the levers 14 and 15 for effecting locking and release of the latch bolt are in accordance with standard practice.
A moulded plastic coupling member 18 is mounted on the end of the connector rod 12 which is attached to the latch mechanism 10, the detailed design of this coupling member 18 being shown in Figure 4. The connector rod 12 has an end portion 19 which is bent at right angles to the main body of the connector rod 12 and the rod connector 12 is passed between a pair of gripping lugs 20 on the coupling member 18 so that the end portion 19 of the rod 12 fits in a socket 21 of the coupling member 18.
At its end remote from the lugs 20, the coupling member 18 includes a pair of aligned trunnions 22 which project one from each side of the coupling member 18. The locking and release levers 14 and 15 are formed with arcuate slots 23 and 24 respectively and the two trunnions 22 are located one in each of the slots 23 and 24. As can be seen from Figure 1, when the latch mechanism 10 is in its unlatched condition, the trunnions 22 are located one at the left hand end of the slot 23 in the locking lever 14 and the other at the right hand end of the slot 24 in the release lever 15.
As will be appreciated from a consideration of Figure 1, when the connector rod 12 is moved to the left, the locking lever 14 will be caused to move in an anti-clockwise direction and a locking action will be performed. When, however, the connector rod 12 is moved to the right as viewed in Figure 1, the release lever 15 will be caused to move about its pivot axis in a clockwise direction and a latch releasing action will be performed.
The locking lever 14 is acted on by an over-centre spring which normally serves to bias the locking lever 14 in the position shown in Figure 1 but which, when the locking lever 14 has been moved into its locking position, then serves to hold the locking lever 14 in its locking position. A torsion spring 40 acts between the locking lever 14 and the coupling member 18, the torsion spring 40 having a first leg 41, which bears against a limb 42 of the locking lever 14, and a second leg 43 which engages with one of the trunnions 22 on the coupling member 18. The torsion spring 40 serves to provide the reaction to ensure that, when the connector rod 12 is moved from its locking position to its unlocking position, the required movements of the latch components are effected.
Turning next to Figure 2 which shows the inside door handle assembly, this includes a moulded plastic dish or bowl 25 within which an inside handle lever 26 is mounted. The lever 26 is pivotally connected to a lug located externally of a side wall 27 of the dish 25 for movement thereto about a pivot axis 28. The lever 26 is movable inwardly from an unlocking position indicated as 26A into a locking position indicated as 26B. It is movable outwardly from the unlocking position 26A into a release or latch open position indicated as 26C.
A slot is formed in the side wall 27 of the dish 25 to permit the required pivotal movements of the handle lever 26 and the dish 25 is fitted within the interior of the door by means of threaded fasteners (not shown) which engage with fixing bosses 29 extending from the base 30 of the dish 25. A triangular bracket 31 also extends from the base 30 of the dish 25, this triangular bracket 31 being located adjacent the corner of the dish 25 and serving as a mounting for a bellcrank lever 32.
The bellcrank lever 32 is formed as a plastic moulding and one arm 33 thereof is formed with a bore in which the bentover end of the connector rod 12 is fitted. The connector rod 12 is thus connected at one end to the plastic coupling member 18 and at the other end to the plastic bellcrank lever 32.
There are thus no metal-to-metal connections involving the connector rod 12. The two plastic components 18 and 32 at the two ends of the metal connector rod 12 thus act as antivibration mountings for the rod 12 and reduce rattle and vibrations.
The other arm 34 of the bellcrank lever 32 is connected by an adjustable rod 35 to an arm 36 of the handle lever 26.
The length of the rod 35 is adjusted so that, when the bellcrank lever 32 is in the position shown in Figure 2, the handle lever 26 is in the correct position 26A, i.e. it is not too far within the dish 25 and it is not projecting too far from the dish 25.
Apertures 37 are formed in the triangular bracket 31 and in arm 33 of the bellcrank lever 32, these apertures being in alignment when the bellcrank lever 32 is appropriately positioned. When, therefore, the inside door handle assembly has been assembled by the component supplier, a peg is fitted in the aligned apertures 37 to hold the components of the inside handle assembly 11 in the correct positions during installation of the handle assembly in the vehicle door. After installation of the latch system, the peg is removed.
The latch assembly 10, inside handle assembly 11 and connector rod 12 may be supplied to the vehicle manufacturer as a pre-assembled unit, or the components 10, 11 and 12 may be supplied as separate units for assembly at the vehicle plant trackside. If the components 10, 11 and 12 are supplied as a pre-assembled unit, the diameter of the connector rod 12 will be greater than if the components 10, 11 and 12 are supplied separately. F6r example, the connector rod 2 may be formed of 5 or 6 mm. diameter wire for the pre-assembled unit as opposed to 3.5 mm. for supply of the separate components.
In either event, the handle assembly 11 is supplied by the component supplier with the setting of the adjustable rod 35 such as to ensure correct positioning of the handle lever 25 and avoiding any requirement for on-line adjustment.
Claims (15)
1. A vehicle door latch system comprising:
a) a latch mechanism for mounting on the door and including a release lever operable to release the latch mechanism and a locking lever having a locking position in which release of the latch mechanism is prevented and an unlocking position in which release of the latch mechanism is permitted;;
b) an inside door handle for mounting on the vehicle door remote from the latch mechanism, said handle including a handle lever which is movable between locking, unlocking and release positions,
c) a rod connector for connecting the inside door handle to the latch mechanism, and
d) a coupling member carried by the end of the rod connected to the latch mechanism, said coupling member including a portion which engages within slots in the release lever and in the locking lever such that, when the inside handle lever is moved in one direction from its unlocking position, such movement is transmitted to the locking lever whereas, when the inside handle lever is moved in the opposite direction from its unlocking position, such movement is transmitted to the release lever.
2. A vehicle door latch system as claimed in Claim 1, in which spring means acts between the locking lever and the coupling member, said spring means providing a reaction for unlocking travel of the locking lever.
3. A vehicle door latch system as claimed in Claim 1, in which the arrangement is such that, when the inside handle lever is in either its locking position or its unlocking position, the release lever is located in engagement with an abutment afforded by part of the latch housing.
4. A vehicle door latch system as claimed in Claim 1, in which the coupling member is in the form of a plastic moulding shaped so that it can be fitted on to the end of the rod connector, the rod connector having an end formation bent at right angles to the main portion of the rod connector and the coupling member including a socket within which said end formation is received.
5. A vehicle door latch system as claimed in Claim 2, in which the spring means which acts between the locking lever and the coupling member is ancillary to an over-centre spring which acts on the locking lever.
6. A vehicle door latch system as claimed in Claim 5, in which the spring means which acts between the locking lever and the coupling member is in the form of a torsion spring which is anchored about the pivot axis for the locking lever and has one leg bearing against a limb of the locking lever and its other leg bearing against the portion of the coupling member located in the slots in the locking and release levers.
7. A vehicle door latch system as claimed in Claim 6, in which the slots in the locking and release levers are arcuate slots centred on the axes of pivotal movement of the two levers with the arcuate length of the slot in the locking lever approximately twice that in the release lever to enable the length of travel of the inside handle lever from its normal or unlocking position into its release position to be approximately twice the length of travel from its normal or unlocking position into its locking position.
8. A vehicle door latch system comprising:
a) a latch mechanism for mounting on the door and including a release lever operable to release the latch mechanism and a locking lever having a locking position in which release of the latch mechanism is prevented and an unlocking position in which release of the latch mechanism is permitted,
b) an inside door handle for mounting on the vehicle door remote from the latch mechanism, said handle including a housing and a handle lever which is movable in one angular direction relative to the housing from an unlocking position into a locking position and is movable in the opposite angular direction relative to the housing from the unlocking position into a release position,
c) a rod connector for connecting the inside door handle to the latch mechanism,
d) a bellcrank lever mounted on the door handle housing, the rod connector being connected to one arm of the bellcrank lever, and
e) an adjustable rod interconnecting the other arm of the bellcrank lever and the inside handle lever, said rod being adjustable in length to permit adjustment of the angular location of the inside handle lever when in its unlocking position.
9. A vehicle door latch system according to Claim 8, in which the inside handle housing is in the form of a moulded plastic bowl or dish within which the body of the inside handle lever is located, the handle lever being pressed into the interior of the bowl or dish to move it from its unlocking position into its locking position, and being pulled outwardly of the bowl or dish to move it from its unlocking position into its release position to open the vehicle door.
10. A vehicle door latch system as claimed in Claim 9, in which the bellcrank lever is mounted on the outside of the base of the housing, i.e. on the side of the base within the vehicle door trim, adjacent a corner of the bowl or dish so that the other arm of the bellcrank lever projects beyond the side wall of the moulded plastic bowl or dish to facilitate attachment of the adjustable rod which extends between said other arm and a part of the handle lever.
11. A vehicle door latch system as claimed in Claim 10, in which the handle lever is mounted on a pivot mounting carried by, and located externally of, said side wall of the bowl or dish, which side wall is slotted to enable the handle lever to project therethrough.
12. A vehicle door latch system as claimed in any one of the preceding claims in the form of a pre-assembled unit for supply to the vehicle manufacturer, i.e. with the rod connector already connected to both the latch mechanism and the inside door handle.
13. A vehicle door latch system as claimed in any one of claims 1 to 11, in which the latch mechanism, rod connector and inside door handle are supplied to the vehicle manufacturer as separate units which are assembled alongside the vehicle assembly line and then fitted in the vehicle door.
14. A vehicle door latch system as claimed in any one of
Claims 8 to 11, or as claimed in Claim 12 or 13 as dependant on any one of Claims 8 to 11, in which a facility is provided for locating the bellcrank lever in a predetermined angular position relative to the inside handle housing and for holding it in that position by means of a peg, the length of the adjustable rod being adjusted with the bellcrank lever held in the required position and then the peg removed after fitting of the latch system in the vehicle door.
15. A vehicle door latch system substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9119792A GB2259734B (en) | 1991-09-17 | 1991-09-17 | Vehicle door latch systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9119792A GB2259734B (en) | 1991-09-17 | 1991-09-17 | Vehicle door latch systems |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9119792D0 GB9119792D0 (en) | 1991-10-30 |
| GB2259734A true GB2259734A (en) | 1993-03-24 |
| GB2259734B GB2259734B (en) | 1994-04-20 |
Family
ID=10701496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9119792A Expired - Fee Related GB2259734B (en) | 1991-09-17 | 1991-09-17 | Vehicle door latch systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2259734B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0632178A1 (en) * | 1993-05-21 | 1995-01-04 | ROLTRA MORSE S.p.A. | Vehicle door lock |
| EP0718455A1 (en) * | 1994-12-23 | 1996-06-26 | ROLTRA MORSE S.p.A. | Vehicle door lock |
| DE19842358A1 (en) * | 1998-09-16 | 2000-03-30 | Kiekert Ag | Vehicle door lock, has an external opening handle and an external actuation rod acting on an actuation lever system |
| EP1518984A1 (en) * | 2003-09-19 | 2005-03-30 | INTIER AUTOMOTIVE CLOSURES S.p.A | Mechanical actuation unit of lock for a door of a motor vehicle, and lock provided with said mechanical actuation unit |
| DE102009019738A1 (en) * | 2009-05-02 | 2010-11-04 | Volkswagen Ag | Lock for mobile attachment part i.e. door, of motor vehicle, has force transmission mechanism transmitting force from actuation lever to locking lever for moving locking lever for realization of locking of attachment part |
| WO2013110149A1 (en) * | 2012-01-23 | 2013-08-01 | Magna Do Brasil Produtos E Serviços Automotivos Ltda | Push-pull latch for vehicle door |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0162535A2 (en) * | 1984-03-22 | 1985-11-27 | General Motors Corporation | Lock and handle module for vehicle door |
| GB2161854A (en) * | 1984-07-21 | 1986-01-22 | Ford Motor Co | Vehicle door lock system |
| US4805723A (en) * | 1986-12-12 | 1989-02-21 | Aisin Seiki Kabushiki Kaisha | Lock assembly for onboard opening cover |
| GB2226076A (en) * | 1988-12-17 | 1990-06-20 | Bocklenberg & Motte Bomoro | Operating linkage for door latch |
-
1991
- 1991-09-17 GB GB9119792A patent/GB2259734B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0162535A2 (en) * | 1984-03-22 | 1985-11-27 | General Motors Corporation | Lock and handle module for vehicle door |
| GB2161854A (en) * | 1984-07-21 | 1986-01-22 | Ford Motor Co | Vehicle door lock system |
| US4805723A (en) * | 1986-12-12 | 1989-02-21 | Aisin Seiki Kabushiki Kaisha | Lock assembly for onboard opening cover |
| GB2226076A (en) * | 1988-12-17 | 1990-06-20 | Bocklenberg & Motte Bomoro | Operating linkage for door latch |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0632178A1 (en) * | 1993-05-21 | 1995-01-04 | ROLTRA MORSE S.p.A. | Vehicle door lock |
| EP0718455A1 (en) * | 1994-12-23 | 1996-06-26 | ROLTRA MORSE S.p.A. | Vehicle door lock |
| DE19842358A1 (en) * | 1998-09-16 | 2000-03-30 | Kiekert Ag | Vehicle door lock, has an external opening handle and an external actuation rod acting on an actuation lever system |
| DE19842358C2 (en) * | 1998-09-16 | 2001-02-22 | Kiekert Ag | Motor vehicle door lock with locking elements |
| EP1518984A1 (en) * | 2003-09-19 | 2005-03-30 | INTIER AUTOMOTIVE CLOSURES S.p.A | Mechanical actuation unit of lock for a door of a motor vehicle, and lock provided with said mechanical actuation unit |
| DE102009019738A1 (en) * | 2009-05-02 | 2010-11-04 | Volkswagen Ag | Lock for mobile attachment part i.e. door, of motor vehicle, has force transmission mechanism transmitting force from actuation lever to locking lever for moving locking lever for realization of locking of attachment part |
| DE102009019738B4 (en) * | 2009-05-02 | 2019-10-24 | Volkswagen Ag | Lock and locking system |
| WO2013110149A1 (en) * | 2012-01-23 | 2013-08-01 | Magna Do Brasil Produtos E Serviços Automotivos Ltda | Push-pull latch for vehicle door |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9119792D0 (en) | 1991-10-30 |
| GB2259734B (en) | 1994-04-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950917 |