US3705738A - Door latch mechanism - Google Patents

Door latch mechanism Download PDF

Info

Publication number
US3705738A
US3705738A US3705738DA US3705738A US 3705738 A US3705738 A US 3705738A US 3705738D A US3705738D A US 3705738DA US 3705738 A US3705738 A US 3705738A
Authority
US
United States
Prior art keywords
door
shaft
striker
latch bolt
engagement
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.)
Expired - Lifetime
Application number
Other languages
English (en)
Inventor
Noboru Yoshimura
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.)
Aisin Corp
Original Assignee
Aisin Seiki Co 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 Aisin Seiki Co Ltd filed Critical Aisin Seiki Co Ltd
Application granted granted Critical
Publication of US3705738A publication Critical patent/US3705738A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • E05B77/36—Noise prevention; Anti-rattling means
    • E05B77/38—Cushion elements, elastic guiding elements or holding elements, e.g. for cushioning or damping the impact of the bolt against the striker during closing of the wing
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/1043—Swinging
    • Y10T292/1044—Multiple head
    • Y10T292/1045—Operating means
    • Y10T292/1047—Closure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/68—Keepers
    • Y10T292/688—With silencing or anti-rattle means

Definitions

  • An automotive door latch mechanism comprising a rotatable latch bolt in the form of a fork, and a boltsupporting shaft with which a striker pin is engageable thereby permitting its tight engagement with the striker pin for preventing the lowering of the vehicle door relative to the stationary member thereof.
  • This invention relates to a door latch mechanism for an automotive vehicle, and more particularly to a door latch mechanism including a latch bolt in the form of a rotatable fork, i.e., the fork-type latch mechanism.
  • the door When the vehicle door has been closed, the door is kept in its closed position without being lowered relative to a stationary member of the vehicle such as a center pillar.
  • door latch mechanism produces no noises and rattles due to the bumping of the vehicle along .the rough road.
  • the door When the vehicle door has been closed, the door can be maintained in its closed condition even when a heavy force to open the door such as a heavy shock in emergency is applied thereto.
  • the main object of the invention is to provide an automotive door latch mechanism adapted for performing the aforementioned various and desirous functions.
  • Another object of the invention is to provide a door latch mechanism which is characterized by its simplicity and compactness in construction and which is relatively small in size, economical to manufacture comparatively quiet in operation and efficient in use.
  • the door latch mechanism according to the present invention comprises,
  • a rotatable striker-pressing member said member being provided with a resilient means for urging said member to press resiliently against the striker in its fully latched position whereby no noises or rattles of the latch mechanism will be produced;
  • a rotatable pawl to engage the latch bolt for performing the door locking operation the engagement point of the pawl and latch bolt being positioned in the same plane asthat of the striker and latch bolt whereby no twisting force is applied on the pawl, thus the engagement of the pawl and latch bolt is kept in safety even when a heavy laterally acting shock may be applied; (It should be recognized that in the conventional door latch mechanism the ratchet to engage the pawl has been rotatably mounted on the bolt-supporting shaft on the back of the base plate relative to the latch bolt so that when the laterally acting shock is applied to the vehicle the engagement of the ratchet and pawl is liable to be released.)
  • FIG. 1 is a plan view of a conventional striker alone
  • FIG. 2 is a side elevational view of the striker of FIG.
  • FIG. 3 is a plane view partly in section showing the inside of the door latch mechanism according to this invention in the fully latched position;
  • FIG. 4 is a vertical cross sectional view taken on the plane indicated by the line IV-IV of FIG. 3;
  • FIG. 5 is a side elevation in the direction of the arrow V in FIG. 3;
  • FIG. 6 is a view similar to FIG. 3, but in the unlatched position
  • FIG. 7 is an external face view of the latch mechanism
  • FIG. 8 is an internal view opposite to that of FIG. 7;
  • FIG. 9 is a view similar to FIG. 3, but showing a modified form of the latch mechanism.
  • the numeral 10 denotes generally a conventional keeper or striker which is fixedly attached to a certain stationary member of the automotive vehicle.
  • the striker 10 comprises a striker plate 11 and a U-shaped pin 12 fitted integrally therewith.
  • a door latch mechanism 13 is fixedly attached to each door of the vehicle to cooperate with the striker 10.
  • the mechanism 13 comprises a door latch base 14 which is secured to the door and a hanger plate 15 which is made integrally with the base plate 14 by stamping and protruded therefrom outside of the door in a manner of socalled plant-on type.
  • a cover plate 41 is secured to the base plate 14.
  • the hanger plate 15 and cover plate 41 mount rigidly two separate shaft 16 and 17.
  • a rotatable fork-shaped latch or bolt 18 is made integrally with the former shaft 16 while a swinging detent or pawl 19 is mounted on the latter shaft 17.
  • the latch bolt 18 is formed with a recess 20 which straddles over the striker pin 12, and further with first and second ratchet teeth 21 and 22, respectively, either thereof being adapted for engagement with tooth 23 formed on the pawl 19.
  • the numeral 24 indicates a coil spring which is mounted on and between an inwardly projecting rod .or pin 25 integral with the bolt 18 and an outward projection 26 of the cover plate 41.
  • the spring 24 may be positioned between the hanger plate 14 and cover plate 41 as is clearly seen in FIG. 4, so that there is no need to provide a space for only the said spring.
  • the latch bolt 18 is caused to rotate about the shaft 16 in the clockwise direction in FIG. 6 by engagement with the striker 10,
  • the coil spring 24 will be expanded around and along the shaft 16.
  • the exerting force of the spring 24 on the bolt 18 is proportional to the rotated amount of the bolt, so that an operating person can easily feel the door closing degree.
  • the shaft 16 comprises an enlarged portion 16a adapted for engagement with the striker pin 12, whereby the lowering of the door relative to the stationary member of the vehicle will be prevented. It will be apparent that any suitable collar may be fitted around the shaft 16 in place of the enlarged portion 16a.
  • a further coil spring 39 is mounted on the shaft 17.
  • One end of the spring 39 is kept in engagement with an inward projection 40 of the pawl 19 so as to urge the pawl 19 to turn in clockwise direction in FIG. 3 whilst its other end is kept engagement with a slot of the cover plate (not shown).
  • a rotatable striker-pressing member 27 made from a plastics material is mounted on the shaft 17 coaxially with the pawl 19.
  • the striker-pressing member 27 comprises a free end 28 one face of which is adapted for engagement with the striker pin 12, the other face being provided with a resilient member 29 secured thereto and preferably made from a'rubber material.
  • the numeral 30 denotes an outwardly projecting flange or abutment the cover plate 41 which is engageable with the resilient member 29 as a stopper when the door is in its fully latched position as is seen in FIG. 3. It should be noted that the resilient member 29 may be secured to the stopper flange 30 in place of the pressing member 27.
  • the numeral 43 denotes a resilient stopper for prevention of excess turning of the latch bolt 18 in the counter clockwise direction in FIG. 6.
  • This modified pressing member 127 is engageable resiliently with the rubber member 129 which is securely attached to the hanger plate 115.
  • the pressing member 127 is urged to press resiliently against the striker by means of the rubber member 129.
  • the engaging point of the striker l and latch bolt 18 is positioned in the same plane as the engaging point of the pawl 19-and latch bolt 18 as is seen in FIG. 4.
  • the numeral 31 indicates a locking lever which is pivotally mounted on an end portion 32 of the shaft 17.
  • One end 31a of the locking lever 31 is operatively connected to an inside locking button (not shown) while its other end 31b is operatively connected to an outside key cylinder (again not shown).
  • Open lever 33 is pivoted on a pin 34 studded on the cover plate 41.
  • One end 33a of the open lever 33 is operatively connected to an inside open handle (not shown) through an inside open lever 37 whilst its other end 33b is operatively connected to an outside door handle (again not shown).
  • An intermediate lever 35 is pivotally mounted on the open lever 33 at a pivot pin 36.
  • a cancelling lever 38 connected to the pawl 19 through its projection 40 secured to the lever 38 and provided with two projecting flanges 38a and 38b is pivotally mounted on the end portion 32 of the shaft 17 coaxially with the locking lever 31.
  • the rocking operation of the open lever 33 about the pivot 34 will be transmitted to the cancelling lever 38 at the flange 3811 thereby permitting the cancelling lever 38 to rotate in the clockwise direction to allow disengagement of the pawl 19 and latch bolt 18.
  • the intermediate lever 35 is rotated in the clockwise direction in FIG. 8 by rotation of the locking lever 31 so that rocking action of the open lever 33 results in an idle movement.
  • the door latch mechanism 13 fixed on the door advances in the direction from left to right in FIG. 3, the striker pin. 12 is brought into engagement with the latch bolt 18 at its recess 20 which is thus caused to rotate in the clockwise direction in FIG. 3 against the exerting force of the spring 24.
  • the front edge of first ratchet tooth 21 on the bolt 18 is brought into engagement with the tooth 23 of the pawl 19 which is thus rotated in the counter clockwise direction against the urging force exerted by the coil spring 39.
  • the ratchet tooth 21 is brought into contact with the pawl member 19 so that the door latch mechanism is maintained in its secondary latched position.
  • the resilient force exerted by the member 29 (or 129) will allow the rocking of pressing member 27 (or 127) between the striker pin 12 and stopper 30 (or hanger plate in dependence upon bumping of the vehicle so as to prevent the noises and rattles of the latch mechanism.
  • the striker pin 12 is engaged with the bolt 18 in the same plane in which the pawl 19 is engaged with the latter as is clearly seen in FIG. 4, whereby objectionable force to cause the pawl 19 to disengage with the latch bolt 18 is not applied to the pawl 19 even when the heavy laterally acting force is applied to the vehicle.
  • a door latching mechanism comprising,
  • a base plate including a hanger plate and fixed to the door
  • a latch bolt in the form of a rotatable fork pivotally mounted on said first shaft and adapted for engagement with a striker pin
  • abutment means forming a part of one of said cover plate and hanger plate
  • resilient means permitting resilient engagement between said striker-pressing member and said abutment means when said striker-pressing means is pressed by the striker pin when the latch bolt is brought to its fully latched position.
  • a door latching mechanism as claimed in claim 1 wherein said pawl engages said latch bolt in the same plane as the plane of engagement of said latch bolt with the striker pin.

Landscapes

  • Lock And Its Accessories (AREA)
US3705738D 1969-10-04 1970-09-28 Door latch mechanism Expired - Lifetime US3705738A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9474269U JPS4823376Y1 (enrdf_load_stackoverflow) 1969-10-04 1969-10-04

Publications (1)

Publication Number Publication Date
US3705738A true US3705738A (en) 1972-12-12

Family

ID=14118559

Family Applications (1)

Application Number Title Priority Date Filing Date
US3705738D Expired - Lifetime US3705738A (en) 1969-10-04 1970-09-28 Door latch mechanism

Country Status (3)

Country Link
US (1) US3705738A (enrdf_load_stackoverflow)
JP (1) JPS4823376Y1 (enrdf_load_stackoverflow)
GB (2) GB1317916A (enrdf_load_stackoverflow)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804441A (en) * 1971-08-27 1974-04-16 Nissan Motor Door latch mechanism
US4466645A (en) * 1982-03-22 1984-08-21 Ohi Seisakusho Co., Ltd. Automobile door latch striker
GB2207455A (en) * 1987-07-29 1989-02-01 Kiekert Gmbh Co Kg Motor vehicle door lock
US5050917A (en) * 1989-09-28 1991-09-24 Mitsui Kinzoku Kogyo Kabushiki Kaisha Striker for vehicle door lock
US5520426A (en) * 1994-09-12 1996-05-28 General Motors Corporation Vehicle door latch with integral pillar dampener
US5642636A (en) * 1993-01-22 1997-07-01 Mitsui Kinzoku Kogyo Kabushiki Kaisha Locking device for trunk lids
US5785366A (en) * 1993-11-30 1998-07-28 Ohi Seisakusho Co., Ltd. Door lock device
US20040260727A1 (en) * 2003-06-23 2004-12-23 Microsoft Corporation Multidimensional data object searching using bit vector indices
US20040261246A1 (en) * 2003-06-24 2004-12-30 M & C Corporation Cold formed latch wire
US20050206173A1 (en) * 2004-03-22 2005-09-22 Lim Nam H Tailgate latch structure of vehicle
US7131693B2 (en) 2003-05-16 2006-11-07 M & C Corporation Restraint anchorage for a child restraint system
US20080122230A1 (en) * 2006-07-03 2008-05-29 Mitsui Mining And Smelting Co., Ltd. Door latch device for a vehicle
US20080276670A1 (en) * 2005-10-22 2008-11-13 A.Raymond Et Cie Lock
US20090021027A1 (en) * 2005-12-29 2009-01-22 Kiekert Ag Motor vehicle door lock
US9022340B2 (en) 2011-03-21 2015-05-05 Techform Products Limited Formed tube with formed wire rivet
US10450782B2 (en) * 2014-01-17 2019-10-22 Inteva Products, Llc Apparatus and method for enhancing sound performance of a latch

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2401295A1 (fr) * 1977-08-23 1979-03-23 Cerdan Jacques Perfectionnement aux serrures pour vehicules automobiles
DE4401071C1 (de) * 1994-01-15 1995-04-27 Audi Ag Schließteilbefestigung
DE112017003303T5 (de) * 2016-06-29 2019-04-04 Southco, Inc. Schliessbolzen zur Verwendung in einer Riegelbaugruppe

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3093992A (en) * 1960-12-05 1963-06-18 Standard Products Co Latch mechanism
US3190682A (en) * 1963-04-16 1965-06-22 Gen Motors Corp Closure latch
US3281176A (en) * 1964-08-21 1966-10-25 American Motors Corp Door lock
US3287049A (en) * 1963-12-04 1966-11-22 L W Menzimer Vehicle latch
US3331624A (en) * 1964-07-10 1967-07-18 Wilmot Breeden Ltd Vehicle door fastening devices
US3371948A (en) * 1966-02-09 1968-03-05 Gen Motors Corp Closure latch
US3432198A (en) * 1967-06-27 1969-03-11 Ford Motor Co Latch mechanism

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3093992A (en) * 1960-12-05 1963-06-18 Standard Products Co Latch mechanism
US3190682A (en) * 1963-04-16 1965-06-22 Gen Motors Corp Closure latch
US3287049A (en) * 1963-12-04 1966-11-22 L W Menzimer Vehicle latch
US3331624A (en) * 1964-07-10 1967-07-18 Wilmot Breeden Ltd Vehicle door fastening devices
US3281176A (en) * 1964-08-21 1966-10-25 American Motors Corp Door lock
US3371948A (en) * 1966-02-09 1968-03-05 Gen Motors Corp Closure latch
US3432198A (en) * 1967-06-27 1969-03-11 Ford Motor Co Latch mechanism

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804441A (en) * 1971-08-27 1974-04-16 Nissan Motor Door latch mechanism
US4466645A (en) * 1982-03-22 1984-08-21 Ohi Seisakusho Co., Ltd. Automobile door latch striker
GB2207455A (en) * 1987-07-29 1989-02-01 Kiekert Gmbh Co Kg Motor vehicle door lock
GB2207455B (en) * 1987-07-29 1991-01-09 Kiekert Gmbh Co Kg Motor vehicle door lock
US5050917A (en) * 1989-09-28 1991-09-24 Mitsui Kinzoku Kogyo Kabushiki Kaisha Striker for vehicle door lock
US5642636A (en) * 1993-01-22 1997-07-01 Mitsui Kinzoku Kogyo Kabushiki Kaisha Locking device for trunk lids
US5785366A (en) * 1993-11-30 1998-07-28 Ohi Seisakusho Co., Ltd. Door lock device
US5520426A (en) * 1994-09-12 1996-05-28 General Motors Corporation Vehicle door latch with integral pillar dampener
US7131693B2 (en) 2003-05-16 2006-11-07 M & C Corporation Restraint anchorage for a child restraint system
US20040260727A1 (en) * 2003-06-23 2004-12-23 Microsoft Corporation Multidimensional data object searching using bit vector indices
US20050168024A1 (en) * 2003-06-24 2005-08-04 M & C Corporation Cold formed latch wire
US6983526B2 (en) 2003-06-24 2006-01-10 M & C Corporation Cold formed latch wire
US20040261246A1 (en) * 2003-06-24 2004-12-30 M & C Corporation Cold formed latch wire
US7484800B2 (en) 2003-06-24 2009-02-03 M & C Corporation Cold formed latch wire
US20050206173A1 (en) * 2004-03-22 2005-09-22 Lim Nam H Tailgate latch structure of vehicle
US20080276670A1 (en) * 2005-10-22 2008-11-13 A.Raymond Et Cie Lock
US8056942B2 (en) 2005-10-22 2011-11-15 A. Raymond Et Cie Lock
US20090021027A1 (en) * 2005-12-29 2009-01-22 Kiekert Ag Motor vehicle door lock
US8596695B2 (en) 2005-12-29 2013-12-03 Kiekert Ag Motor vehicle door lock
US20080122230A1 (en) * 2006-07-03 2008-05-29 Mitsui Mining And Smelting Co., Ltd. Door latch device for a vehicle
US8403378B2 (en) * 2006-07-03 2013-03-26 Mitsui Mining And Smelting Co., Ltd. Door latch device for a vehicle
US9022340B2 (en) 2011-03-21 2015-05-05 Techform Products Limited Formed tube with formed wire rivet
US10450782B2 (en) * 2014-01-17 2019-10-22 Inteva Products, Llc Apparatus and method for enhancing sound performance of a latch

Also Published As

Publication number Publication date
DE2048206B2 (de) 1976-07-29
GB1317916A (en) 1973-05-23
DE2048206A1 (de) 1971-05-13
GB1317917A (en) 1973-05-23
JPS4823376Y1 (enrdf_load_stackoverflow) 1973-07-07

Similar Documents

Publication Publication Date Title
US3705738A (en) Door latch mechanism
US3767243A (en) Door latch mechanism
US2557468A (en) Door lock
US5277461A (en) Vehicle door latch
US2629618A (en) Door lock
US3695660A (en) Vehicle body door lock
US2075495A (en) Door lock
US3528695A (en) Flush type door handle for vehicle bodies
US2716569A (en) Door lock
US3840258A (en) Motor-vehicle door latch
US2683617A (en) Door lock
GB1068001A (en) Door latch mechanisms
US3791686A (en) Door lock mechanism
US2955865A (en) Automobile door latch
US2680639A (en) Deck lid lock
US3385623A (en) Closure latch
US2603516A (en) Door lock
US3173715A (en) Door lock
US2796275A (en) Door lock
US2637580A (en) Door lock
US3228676A (en) Vehicle body closure latch
US3231302A (en) Door latch mechanism
JP2516432B2 (ja) 自動車用ドアロック装置
US3388940A (en) Closure latch
GB1353439A (en) Door latches for motor vehicles