GB2116621A - Door latch - Google Patents
Door latch Download PDFInfo
- Publication number
- GB2116621A GB2116621A GB08206461A GB8206461A GB2116621A GB 2116621 A GB2116621 A GB 2116621A GB 08206461 A GB08206461 A GB 08206461A GB 8206461 A GB8206461 A GB 8206461A GB 2116621 A GB2116621 A GB 2116621A
- Authority
- GB
- United Kingdom
- Prior art keywords
- locking member
- cylinder lock
- solenoid
- locking
- actuating 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.)
- Granted
Links
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
- E05B77/46—Locking several wings simultaneously
- E05B77/48—Locking several wings simultaneously by electrical means
Abstract
A door latch comprises a latch element (30) for engaging a striker pin, a pawl (35) for retaining the latch element (30) in an engaged position, an actuating lever (21) operable by a control member to disengage the pawl (35) from the latch element (30), a locking member (8) movable between a locking position and an unlocking position in which the operation of the actuating lever is prevented and allowed respectively, a cylinder lock (12) connected to the locking member (8) for moving the locking member between the locking and unlocking positions, a solenoid (10) for moving the locking member between the locking and unlocking positions, and a lost motion connection (14-16) between the locking member and the cylinder lock or the solenoid permitting independent operation of the locking member by the cylinder lock and the solenoid, the locking member being slidably mounted on a mounting bracket (5), which also carries the solenoid (10), the cylinder lock (12) and the actuating lever (21). <IMAGE>
Description
SPECIFICATION
Door latch
This invention relates to door latches.
Conventional door latches for motor vehicles comprise a latch element for engaging a striker pin, a pawl for retaining the latch element in an engaged position, an actuating lever operable by a control member, such as an exterior door handle or push button, for disengaging the pawl from the latch element, a locking member movable between a locking position and an unlocking position in which operation of the actuating lever is prevented and allowed respectively, and a cylinder lock connected to the locking member for moving the locking member between the locking and unlocking positions.
The locking member is usually also operable by a further control member, such as a sill button adapted to be mounted on the opposite side of the door from the other control member so that the door can be locked from either side. One or other of the connections between the locking member and the cylinder lock and the further control member includes a lost motion linkage to permit independant operation of the locking member by the cylinder lock and the further control member.
Such locks suffer from the disadvantage that the connections between the locking member and the cylinder lock and the further control member are often positioned in relatively exposed positions within the vehicle door which facilitates unauthorized release of the latch when locked.
According to the present invention there is provided:- a door latch comprising a latch elementfor engaging a striker pin, a pawl for retaining the latch element in an engaged position, an actuating lever operable by a control member to disengage the pawl from the latch element, a locking member movable between a locking position and an unlocking position in which the operation of the actuating lever is prevented and allowed respectively, a cylinder lock connected to the locking member for moving the locking member between the locking and unlocking positions, a solenoid for moving the locking member between the locking and unlocking positions, and a lost motion connection between the locking member and the cylinder lock or the solenoid permitting independent operation of the locking member by the cylinder lock or the solenoid, characterised in that the locking member is slidably mounted on a mounting bracket, which also carries the solenoid, the cylinder lock and the actuating lever. By mounting the locking member, the solenoid, the cylinder lock and the actuating lever on a common mounting bracket the connections between the locking member and the solenoid and the cylinder lock can be arranged adjacent to each other and to the actuating lever, thereby increasing the difficulty with which the lock may be tampered with. For example the mounting bracket may include a wall which, in use, lies along one side of the vehicle door immediately beneath the window sill of the door, and a flange along one edge of the wall which prevents access to the locking member from above via the window sill.
A preferred embodiment ofthe invention wiil now be described by way of example only, with reference to the accompanying drawing which is a cut - away pespective sketch of a vehicle door incorporating a latch in accordance with the invention.
Referring to the drawing, a door for a motor vehicle comprises an outer panel 1 and an inner pannel 2 having a flange which forms the edge 3 of the door.
The door carries a latch which comprises a mounting bracket 5 in the form of a plate having a vertical wall 6 secured to the outer panel 1 of the door and a flange 7 projecting inwardly along the upper edge of the vertical wall 6.
Beneath the flange 7 is mounted a locking member 8 which is reciprocably mounted in a bearing 9 and a solenoid 10. Part of the locking member 8 passes through the centre of the solenoid 10 and is formed of ferromagnetic material so that actuation of the solenoid 10 moves the locking member 8 to the right as seen in the drawing.
One end of the locking member 8 is connected to the barrel of a cylinder lock 12 of conventional construction secured to the mounting bracket 5 beneath the flange 7. The cylinder lock registers with a hole in the outer panel 1 of the door to permit operation of the cylinder lock from the exterior of the door by a key 13. The connection between the locking member 8 and the cylinder lock 12 includes a lost motion connection indicated schematically as a radial tongue 14 on the cylinder lock 12 which rotates when the key 13 is turned into engagement with one or other of two spaced abutments 15, 16 on the end of the locking member. The lost motion connection allows the locking member to be reciprocated between two end positions either by the cylinder lock 12 or by the solenoid.
In one end position (not illustrated) the locking member is engaged in an aperture 20 in an L-shaped actuating lever 21 pivotally mounted on the mounting bracket 5 for movement about an axis parallel to the axis of reciprocation of the locking member. One arm 22 of the actuating lever 21 projects through an aperture in the mounting bracket 5 and is attached to a door handle (not shown) or the outside of the door.
The other arm 23 of the actuating lever 21 projects inwardly from the outer panel 1 beneath the flange 7 of the mounting bracket 5 alongside the edge 3 of the inner door panel 2.
The edge 3 of the inner door panel carries a further mounting bracket 29 on which a U-shaped latch element 30 of conventional construction is pivotably mounted. The bracket 29 also includes a flange 31 which overlies the latch element 30. The latch element 30 is shaped to receive a striker pin (not shovvn) which registers with an open ended slot 32 in the inner door panel 2 as the door is closed, and is retained in engagement with the striker pin by a pawl 35 which is also pivotally mounted on the mounting bracket 29 beneath the flange 31. One end of the paw 35 engages with the latch element 30, and the other is engaged by the actuating lever 21 so that pivotal movement of the lever 21 disengages the pawl from the latch element.
The pawl may also be operated by an interior handle 36 mounted on the inner door panel and connected to the pawl by a flexible control cable 37.
In use the latch is locked and uniocked by reciprocating the locking member 8 into and out of engagement with the aperture 20 in the actuating lever 21, thereby preventing or allowing operation of the actuating lever by the exterior handle. This may be achieved either by operating the solenoid 10 from inside the vehicle by means of a switch indicated schematically at 40, or from outside the vehicle by means of the cylinder lock and key. The switch 40 may be connected to the solenoids of similar latches on other doors of the vehicle so that all the latches can be controlled from a central location.
Since the number of working parts of the latch are at a minimum, and access to the working parts is prevented by the flanges 7 and 31 on the mounting brackets 5 and 29, release of the latch by tampering with its internal mechanism is extremely difficult.
Claims (4)
1. A door latch comprising a latch element for engaging a striker pin, a pawl for retaining the latch element in an engaged position, an actuating lever operable by a control member to disengage the pawl from the latch element, a locking member movable
between a locking position and an unlocking position in which the operation of the actuating lever is
prevented and allowed respectively, a cylinder lock
connected to the locking member for moving the
locking member between the locking and unlocking
positions, a solenoid for moving the locking member between the locking and unlocking positions, and a lost motion connection between the locking member and the cylinder lock or the solenoid permitting independent operation of the locking member by the cylinder lock or the solenoid, characterised in that the locking member is slidably mounted on a mounting bracket, which also carries the solenoid, the cylinder lock and the actuating lever.
2. A door latch according to claim 1 wherein the mounting bracket comprises a wall and a flange overlying the locking member, solenoid cylinder lock and actuating lever.
3. A door latch according to claim 1 or claims 2 wherein the pawl, and the latch element are mounted on a mounting bracket which includes a flange overlying the pawl and the latch element. -
4. A door latch according to any one of claims 1 to 3 wherein the pawl is operably by a further handle connected thereto by a flexible control cable.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08206461A GB2116621B (en) | 1982-03-04 | 1982-03-04 | Door latch |
| DE19838304354 DE8304354U1 (en) | 1982-03-04 | 1983-02-17 | MOTOR VEHICLE WITH VEHICLE DOORS WITH A MANUAL AND CENTRAL LOCK |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08206461A GB2116621B (en) | 1982-03-04 | 1982-03-04 | Door latch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2116621A true GB2116621A (en) | 1983-09-28 |
| GB2116621B GB2116621B (en) | 1985-09-18 |
Family
ID=10528795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08206461A Expired GB2116621B (en) | 1982-03-04 | 1982-03-04 | Door latch |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE8304354U1 (en) |
| GB (1) | GB2116621B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2188971A (en) * | 1986-04-11 | 1987-10-14 | Walter Wilson Hugh Clarke | Electromagnetic gate lock |
| EP0589158A1 (en) * | 1992-08-25 | 1994-03-30 | Bayerische Motoren Werke Aktiengesellschaft | Remote controlled lock, particularly for motor vehicle doors |
| GB2291466A (en) * | 1994-07-21 | 1996-01-24 | C E Marshall | Locking arrangement |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60208583A (en) * | 1984-03-30 | 1985-10-21 | 株式会社 大井製作所 | Door lock apparatus for car |
| DE3500550A1 (en) * | 1985-01-10 | 1985-10-31 | Daimler-Benz Ag, 7000 Stuttgart | Lock system in a motor-vehicle door fastening |
| DE3526501A1 (en) * | 1985-07-24 | 1987-02-05 | Kiekert Gmbh Co Kg | MOTOR VEHICLE DOOR LOCK |
| DE3530861A1 (en) * | 1985-08-29 | 1987-03-12 | Schramm Paul Josef | Break-in prevention device for a motor-vehicle door |
| DE3625068C1 (en) * | 1986-07-24 | 1987-09-17 | Daimler Benz Ag | Cylinder lock actuator assembly |
| JPH0194569U (en) * | 1987-12-17 | 1989-06-22 | ||
| DE3923726A1 (en) * | 1989-07-18 | 1991-01-24 | Bayerische Motoren Werke Ag | Lock for car door - has security device which prevents release of lock by actuation of door handles |
-
1982
- 1982-03-04 GB GB08206461A patent/GB2116621B/en not_active Expired
-
1983
- 1983-02-17 DE DE19838304354 patent/DE8304354U1/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2188971A (en) * | 1986-04-11 | 1987-10-14 | Walter Wilson Hugh Clarke | Electromagnetic gate lock |
| GB2188971B (en) * | 1986-04-11 | 1989-11-22 | Walter Wilson Hugh Clarke | Electromechanical gate lock |
| EP0589158A1 (en) * | 1992-08-25 | 1994-03-30 | Bayerische Motoren Werke Aktiengesellschaft | Remote controlled lock, particularly for motor vehicle doors |
| GB2291466A (en) * | 1994-07-21 | 1996-01-24 | C E Marshall | Locking arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| DE8304354U1 (en) | 1983-07-14 |
| GB2116621B (en) | 1985-09-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 746 | Register noted 'licences of right' (sect. 46/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930304 |