GB2307271A - Automobile door latch - Google Patents

Automobile door latch Download PDF

Info

Publication number
GB2307271A
GB2307271A GB9523685A GB9523685A GB2307271A GB 2307271 A GB2307271 A GB 2307271A GB 9523685 A GB9523685 A GB 9523685A GB 9523685 A GB9523685 A GB 9523685A GB 2307271 A GB2307271 A GB 2307271A
Authority
GB
United Kingdom
Prior art keywords
latch
automobile door
circles
door latch
detent 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Withdrawn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
GB9523685A
Other versions
GB9523685D0 (en
Inventor
John Phillip Chevalier
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9523685A priority Critical patent/GB2307271A/en
Publication of GB9523685D0 publication Critical patent/GB9523685D0/en
Priority to AU76313/96A priority patent/AU7631396A/en
Priority to PCT/GB1996/002852 priority patent/WO1997019243A1/en
Publication of GB2307271A publication Critical patent/GB2307271A/en
Withdrawn legal-status Critical Current

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
    • E05B85/20—Bolts or detents
    • E05B85/24—Bolts rotating about an axis
    • E05B85/26—Cooperation between bolts and detents
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C3/00—Fastening devices with bolts moving pivotally or rotatively
    • E05C3/12—Fastening devices with bolts moving pivotally or rotatively with latching action
    • E05C3/16—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch
    • E05C3/22—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch the bolt being spring controlled
    • E05C3/24—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch the bolt being spring controlled in the form of a bifurcated member
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
    • E05B15/0086—Toggle levers
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/0025—Devices for forcing the wing firmly against its seat or to initiate the opening of the wing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lock And Its Accessories (AREA)

Abstract

The present invention concerns a latch of the type utilised to secure automobile doors, boots, bonnets, hoods, and other similar applications. The present invention is characterised in that the indentation 15 of a latch 5 is formed in at least three sides thereof ab, bc, cd, along three circles one thereof is enclosed between the two others, and in that the positioning of an articulated detent lever 20 in relation to the latch allows for an obtuse angle 25 to be defined between the fulcrum 40 of the said detent lever and the pressure surface of a notch 60 with the centre of the articulation pin 35 as the vertex of the said angle. The present invention provides for an improved safety automobile door latch whereby the greater the force applied to force the latch to unlatch the more secure it becomes.

Description

Safety Automobile Door Latch Arrangement The present invention relates to a latch of the type utilised to secure automobile doors bonnets, boots, hoods, and other similar applications.
Automobile door latches comprise a certain mechanical arrangement that serves to effect a controlled movement of a latch bolt from a latched position into an unlatched one and vice versa.
The purpose of automobile door latches is to secure the safety of passengers when on board of a motor vehicle and to allow a controlled access thereto. Also it serves to ensure the security of the vehicle as well as goods left or transported thereby.
The incessant demand for improved automobile safety and security has led to significant efforts being devoted to improving such devices.
The present invention offers an improved safety automobile door latch arrangement.
According to the present invention there is provided a safety automobile door latch arrangement comprising: a pivotable latch 5 capable of retaining a striker 10 by means of a suitably adapted indentation 15 thereof; an articulated detent lever 20 capable of retaining the said latch in a latched position whereby the positioning of the said articulated detent lever in relation to the latch is effected in a manner allowing for an obtuse angle 25 to be defined by a first straight line 30 passing through the centres ofthe articulation pin 35 and the fulcrum 40 of the said articulated detent lever and by a second straight line 45 perpendicular to the radius 50 that extends from the centre of the latch pivot 55 through the pressure surface of an abutment notch 60; the indentation ofthe said latch is characterised in that at least three sides ab, bc, cd, thereof are formed along parts of circumferences of three circles 65 one thereof is at least in one part thereof enclosed between the two others.
Two of the said circles may either be concentric or have independent centres.
The pivot of the said latch and one of the three circles may be enclosed between the two others.
At least one outer side of the said latch may be formed in a suitable manner along an arc-like continuous or broken line.
The present invention can now be explained by way of example with reference to the following drawings.
Figures 1, 2, and 3, show in perspective the various elements ofthe present invention in a number of possible arrangements thereof.
Referring to Figure 1, the present invention is a safety automobile door latch arrangement comprising: a pivotable latch 5 capable of retaining a striker 10 by means of a suitably adapted indentation 15 thereof; an articulated detent lever 20 capable of retaining the said latch in a latched position whereby the positioning of the said articulated detent lever in relation to the latch is effected in a manner allowing for an obtuse angle 25 to be defined by a first straight line 30 passing through the centres of the articulation pin 35 and the fulcrum 40 of the said detent lever and by a second straight line 45 perpendicular to the radius 50 that extends from the centre of the latch pivot 55 through the pressure surface of an abutment notch 60.The indentation of the said latch is characterised in that at least three sides ab, bc, cd, thereof are formed along parts of circumferences of three circles 65 one thereof is at least in one part thereof enclosed between the two others. Two of the said circles share the same centre 75.
Both the concentre 75 and the centre 80 of the said third circle which is enclosed between the two others are located on the circumference of a fourth circle 85 concentric with the pivot of the said latch. The concentre 75 is at equal distances from both centres 55 and 80. This specific arrangement has a particular advantage in that by applying a pull force 90 acting on the said striker, while the said latch is in a latched position, a direct pressure force 95 acting on the pivot 55 ofthe latch and an angular moment force 100 acting around thereof are created thus causing the striker to adhere towards the centre of the pivot of the latch and concomitantly reduce the resultant pressure force 105 acting on the detent lever whereby the greater the said pull force the more would the striker move towards the centre the pivot of the said latch.Equally, the greater the said resultant pressure force acting on the detent lever the more would the detent lever adhere to the latch and the more difficult the unlatching thereof would become. Another important advantage due to the present latch arrangement is the increased stability of the latch as a result of the enlarged contact surface 110 between the striker and the latch.
Figure 2 shows an embodiment of the present invention whereby the indentation sides ab, and cd, are formed along chords oftwo concentric circles 65. A fourth side de, also forms part of the said indentation. The said latch has two opposing outer sides 70. This has the advantage of increasing the resistance to bending of the part of the latch retained in the said striker.
Figure 3 shows two of the circles 65 with independent centres 115 and 120, and an outer side 125 formed partly along a curved line 70 and partly along a broken one 130

Claims (7)

  1. CLAIMS 1) A safety automobile door latch arrangement comprising: a pivotable latch 5 capable of retaining a striker 10 by means of a suitably adapted indentation 15 thereof; an articulated detent lever 20 capable of retaining the said latch in a latched position whereby the positioning of the said articulated detent lever in relation to the latch is effected in a manner allowing for an obtuse angle 25 to be defined by a first straight line 30 passing through the centres of the articulation pin 35 and the fulcrum 40 of the said articulated detent lever and by a second straight line 45 perpendicular to the radius 50 that extends from the centre of the latch pivot 55 through the pressure surface of an abutment notch 60; the indentation ofthe said latch is characterised in that at least three sides ab, bc, cd, thereof are formed along parts of circumferences of three circles 65 one thereof is at least in one part thereof enclosed between the two others.
  2. 2) A safety automobile door latch arrangement as described in Claim 1, wherein according to the present invention two of the said three circles may either be concentric or have independent centres.
  3. 3) A safety automobile door latch arrangement as described in Claim 1, and Claim 2, wherein in the pivot of the said latch and one of the three circles may partly be enclosed between the two other circles.
  4. 4) A safety automobile door latch arrangement as described in Claims 1 to 3, wherein at least one outer side of the said latch may be formed along an arc-like continuous or broken line.
  5. 5) A safety automobile door latch arrangement as described in Claims 1 to 4, wherein two of the said three circles are concentric. Such concentre and the centre of the third circle are located on the circumference of a fourth circle that is concentric with the pivot of the latch.
    The concentre of the said two circles is located at equal distances from the centre of the pivot ofthe latch and the centre of the third circle.
  6. 6) A safety automobile door latch arrangement as hereinbefore described with reference to figures I to 3, of the accompanying drawings.
  7. 7) A safety automobile door latch arrangement as claimed in claim 1 wherein either the said articulated detent lever or the said indentation as described hereinbefore retained.
GB9523685A 1995-11-20 1995-11-20 Automobile door latch Withdrawn GB2307271A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9523685A GB2307271A (en) 1995-11-20 1995-11-20 Automobile door latch
AU76313/96A AU7631396A (en) 1995-11-20 1996-11-20 Latch arrangement suitable for an automobile door
PCT/GB1996/002852 WO1997019243A1 (en) 1995-11-20 1996-11-20 Latch arrangement suitable for an automobile door

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9523685A GB2307271A (en) 1995-11-20 1995-11-20 Automobile door latch

Publications (2)

Publication Number Publication Date
GB9523685D0 GB9523685D0 (en) 1996-01-24
GB2307271A true GB2307271A (en) 1997-05-21

Family

ID=10784148

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9523685A Withdrawn GB2307271A (en) 1995-11-20 1995-11-20 Automobile door latch

Country Status (3)

Country Link
AU (1) AU7631396A (en)
GB (1) GB2307271A (en)
WO (1) WO1997019243A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905627A (en) * 1973-01-25 1975-09-16 Aisin Seiki Door lock mechanism
US4235462A (en) * 1977-04-20 1980-11-25 Aisin Seiki Kabushiki Kaisha Door locking apparatus for vehicles
EP0130726A1 (en) * 1983-06-23 1985-01-09 Wilmot Breeden Limited Electrically-operated vehicle door latch
EP0496039A1 (en) * 1991-01-24 1992-07-29 Kiekert Gmbh & Co Kg Door lock for motor vehicle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2401295A1 (en) * 1977-08-23 1979-03-23 Cerdan Jacques Automobile door lock with double-arm lever bolt - has contoured ratchet engaging both bolt legs at closure
FR2424392A2 (en) * 1978-04-28 1979-11-23 Cerdan Jacques Burst-proof automobile door lock - uses recoil-sprung forked pivot bolt secured by ratchet having tubular inter-wall strut as axle
DE3809317A1 (en) * 1988-03-19 1989-10-05 Ymos Ag Ind Produkte DOOR LOCK
IT217128Z2 (en) * 1989-07-04 1991-11-12 Fiat Auto Spa LOCK WITH REDUCED OPENING LOAD

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905627A (en) * 1973-01-25 1975-09-16 Aisin Seiki Door lock mechanism
US4235462A (en) * 1977-04-20 1980-11-25 Aisin Seiki Kabushiki Kaisha Door locking apparatus for vehicles
EP0130726A1 (en) * 1983-06-23 1985-01-09 Wilmot Breeden Limited Electrically-operated vehicle door latch
EP0496039A1 (en) * 1991-01-24 1992-07-29 Kiekert Gmbh & Co Kg Door lock for motor vehicle

Also Published As

Publication number Publication date
GB9523685D0 (en) 1996-01-24
AU7631396A (en) 1997-06-11
WO1997019243A1 (en) 1997-05-29

Similar Documents

Publication Publication Date Title
CA1163658A (en) Patio door lock
US5564295A (en) Handle operable rotary latch and lock
US4580822A (en) Door handle for a vehicle
BR9704848A (en) Lock for opening part of motor vehicle
US5209532A (en) Door lock device
US4413849A (en) Tool-operated flush-mountable latch
CA2213147A1 (en) Door panel mating assembly
GB2302129A (en) Automotive door lock device
CA1305507C (en) Door alignment assembly and method
US4312204A (en) Paddle lock with translatably-mounted handle disconnect member
KR950032965A (en) Multiple lock assembly
JPS5943631B2 (en) A composite device for automobile locks consisting of a lock cylinder, a lock cylinder housing, and conventional auxiliary components.
US6584647B2 (en) Hinge for a motor vehicle rear door
GB2307271A (en) Automobile door latch
GB1563316A (en) Hinges
CN1307983A (en) Automobile hauling chain without pivot
JPH0224465A (en) Safety device
ATE217674T1 (en) TOLERANCE COMPENSATION FOR A FORCE TRANSMITTING CONNECTION BETWEEN A HANDLE AND A LOCK RELEASE LEVER
CA2197855A1 (en) Security Valve Assembly
ES289444U (en) Lock, especially for vehicles.
CA2259815C (en) Self aligning drive nut bracket
JPS60452Y2 (en) Automotive door handle device
ATE288981T1 (en) ROTARY BAR LOCK, ESPECIALLY FOR SWINGING DOORS OF MOTOR VEHICLE BODYSUITS
JPH07257186A (en) Door check mechanism for automobile
GB2196053A (en) Hinge assemblies

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)