GB1565695A - Reclining seat mechanism - Google Patents

Reclining seat mechanism Download PDF

Info

Publication number
GB1565695A
GB1565695A GB33263/76A GB3326376A GB1565695A GB 1565695 A GB1565695 A GB 1565695A GB 33263/76 A GB33263/76 A GB 33263/76A GB 3326376 A GB3326376 A GB 3326376A GB 1565695 A GB1565695 A GB 1565695A
Authority
GB
United Kingdom
Prior art keywords
plate
lever
pin
slot
teeth
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
Application number
GB33263/76A
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.)
Britax Ltd
Original Assignee
Britax 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 Britax Ltd filed Critical Britax Ltd
Priority to GB33263/76A priority Critical patent/GB1565695A/en
Publication of GB1565695A publication Critical patent/GB1565695A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/235—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms
    • B60N2/2356—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls
    • B60N2/2362—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls rotatably movable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/235—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms
    • B60N2/2356—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls
    • B60N2/236—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls linearly movable

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Description

(54) RECLINING SEAT MECHANISM (71) We, BRITAX (WINGARD) LIMITED formerly WINGARD LIMITED a British Company of Chandler Road, Chichester, Sussex, P019 2UG do hereby declare the invention for which we pray that a patent may be granted to us and the method by which it is to be performed to be particularly described in and by the following statement: This invention relates to a reclining seat mechanism.
Many reclining seat mechanisms are known which basically comprise a movable toothed element which meshes with a toothed member fitted, for example, to a hinged back rest, the movable element being connected to an operating lever for engaging and disengaging the teeth. However, such mechanisms are often complicated in construction and therefore expensive to manufacture and to assemble.
An object of this invention is to provide a seat reclining mechanism of relatively simple construction thereby saving manufacturing cost and labour.
According to the invention, a seat reclining mechanism comprising a pair of plates for respective attachment to a seat frame and a back rest frame, a movable toothed locking element supported by one of said plates, the other plate including a toothed member engageable by said toothed element, and the mechanism including a lever which is adapted to pivot about a first pivot point in a first phase of its movement, thereby to release the movable locking element, and to pivot about a second pivot point, spaced from the first pivot point, during a second phase of its movement, thereby to displace the movable locking element so as to disengage said teeth.
The lever may have a portion in the form of a cam providing a fulcrum for displacing the movable toothed locking element in one direction of lever movement and acting to secure the movable locking element in an opposite direction of lever movement.
Alternatively, it may comprise a portion which pivots about said first pivot point in order to move transversely of a hinge axis between said plates to release the movable toothed locking element.
The preferred embodiments of the invention will now be described with reference to the accompanying drawings in which: Figures 1 and 2 are elevational and sectional views of a first embodiment of the invention Figures 3, 4 and 5 are exploded, elevational and sectional views of a second embodiment, and Figure 6 is an exploded view of a third embodiment.
Referring to Figures 1 and 2, a seat reclining mechanism comprises a pair of quadrant shaped plates 1, 2 which are respectively secured to a back rest frame 3, and seat frame 4 of a car seat (not shown). Plates 1 and 2 are hinged on a pin 5 and are spaced by a triangular locking plate 6. An arcuate rack 7 is secured to the periphery of plate 1 and the locking plate 6 has an arcuate row of teeth 8 which mesh with the teeth of rack 7. As explained below, the locking plate 6 is moved perpendicularly of the hinge axis, through pin 5, by movement of a lever 9 to cause engagement and disengagement between the teeth 8 on the locking plate 6 and the teeth on the rack 7. When the teeth are disengaged, member 1 may be pivoted about the hinge axis, to adjust the relative inclination between the back rest frame 3 and the seat frame 4, the teeth being re-engaged to secure the frames in a desired position.
Plate 2 has a folded over edge 10 which slidably engages the upper edges of plate 1 and rack 7. It also includes a specially shaped aperture 11 in which is received a disc shaped member 12 having a lobe 13. Member 12 is shown by cross hatching in one of its posi tions in which the teeth 8 are meshed with rack 7. The aperture 11 defines an inwardly directed shoulder 14 which is abutted by one end of lobe 13 when the lever 9 is raised.
A pin 15, projecting from member 12, is pivotally secured to the locking plate 6. A boss 16 projects from the other side of member 12 and is secured by a cyr clip 17 and a washer 18 to the inner face of plate 2. Lever 9 is mounted on boss 16 and is normally biased towards the seat frame 4 by a spring 19. The locking plate 6 has a slot 20 which receives the hinge pin 5.
In operation, lever 9 is raised until the lobe 13 on member 12 abuts the shoulder 14. At this stage, member 12 has been moved so as to free the locking plate 6 for subsequent movement. Further rotation of lever 9 causes the locking plate 6 to move away from the rack 7, lobe 13 acting as a fulcrum against the internal shoulder 14 to provide the leverage for deflecting plate 6. Plate 6 moves to the limit of slot 20 to disengage its teeth 8 with rack 7. The relative inclination between the back rest frame 3 and the seat frame 4 may now be adjusted.
After adjustment, the lever 9 is depressed, moving the locking plate 6 towards the rack 7 and, during the final phase of movement, the member 12 is rotated to lock plate 6 with the teeth in mesh.
In the embodiment of Figures 3,4 and 5, a triangular locking plate 22 is mounted for slidable movement relative to a rack 23 secured to the back rest frame 24. Figure 3 shows how a locking plate 22 is supported by an arcuate plate 25 which is secured to a seat frame 26. An operating lever 27 is integral with a transverse member 28 having pins 29, 30 projecting from respective ends.
Pin 29 is received in an apertured strip 34 fast with plate 22. Strip 34 is slidably located in a rectangular slot 36 in plate 25. Pin 30 is received in a slot 33 in plate 25. A pin 31, attached to plate 25, passes through a slot 32 in plate 22.
Referring to Fig. 5, a hinge pin 37 passes through respective apertures in the quadrant shaped plates 25 and 38 which are secured to the seat frame and back rest frame respectively.
In operation, the lever 27 is raised moving pin 30 along the slot 33 thereby releasing the plate 22 to disengage its teeth 39 from the rack 23. When the lever 27 is raised further, the end the slot 33 acts as a fulcrum for pin 30 to cause the locking plate 22 to move slidably towards the hinge axis of pin 37. The teeth 39 are thereby disengaged from the rack 23 allowing adjustment between the back rest frame 24 and the seat frame 26. The teeth are re-meshed by depressing lever 27 to the starting position shown in Figure 4. The lever 27, and/or locking plate 22 are biased so as to maintain meshing engagement between teeth 39 and rack 23.
In the embodiment of Figure 6, quadrant shaped plates 41 and 42 are secured to the back rest frame and seat frame of the seat respectively. They are hinged together by a pin (not shown) passing through apertures 43, 44. A locking plate 45 has teeth 46 for engaging the teeth on a rack 47 secured to plate 41. Plate 45 is provided with a slot 48 and a pin 49. Slot 48 receives a hinge pin which passes through apertures 43 and 44.
Pin 49 projects through a slot 50 in plate 42 and is received in an aperture 51 in the end portion 52 of a lever 53.
Lever 53, which is pivotally mounted on pin 49, extends between an abutment 54 with an arcuate shaped surface 55, and a pin 56.
The end portion 52 has an arcuate surface with a projecting nose portion 52'. The nose portion 52' normally engages the arcuate surface 55 of abutment 54 whereby the pin 49, and hence locking plate 45, are urged away from the hinge axis of the quadrant shaped plates 41, 42. When the lever 53 is raised, the nose portion 52' travels past the arcuate surface 55 of abutment 54, releasing the locking plate 45. The lever 53 then abuts pin 56 and, further raising, will cause pin 49, and hence plate 45, to be urged towards the hinge axis of plates 41,42, thereby disengaging teeth 46 from rack 47. The pin 56 acts as a fulcrum to provide the leverage to slide the locking plate 45 on its slot 48.
The lever 53 and/or the locking plate 46 may be biased so that the teeth 46 normally engage the rack 47.
WHAT WE CLAIM IS: 1. A seat reclining mechanism comprising a pair of plates for respective attachment to a seat frame and a back rest frame, a movable toothed locking element supported by one of said plates, the other plate including a toothed member engageable by said toothed element, and the mechanism including a lever which is adapted to pivot about a first pivot point in a first phase of its movement, thereby to release the movable locking element, and to pivot about a second pivot point, spaced from the first pivot point, during a second phase of its movement, thereby to displace the movable locking element so as to disengage said teeth.
2. A mechanism according to claim 1 in which a portion of the lever is in the form of a cam providing a fulcrum for displacing the movable toothed locking element in one direction of lever movement and acting to secure the movable locking element in an opposite direction of lever movement.
3. A mechanism according to claim 2 wherein the cam is supported for rotable movement in an aperture in the plate including said toothed member.
4. A mechanism according to claim 2 or 3 wherein the end of the lever includes a cam
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (12)

**WARNING** start of CLMS field may overlap end of DESC **. tions in which the teeth 8 are meshed with rack 7. The aperture 11 defines an inwardly directed shoulder 14 which is abutted by one end of lobe 13 when the lever 9 is raised. A pin 15, projecting from member 12, is pivotally secured to the locking plate 6. A boss 16 projects from the other side of member 12 and is secured by a cyr clip 17 and a washer 18 to the inner face of plate 2. Lever 9 is mounted on boss 16 and is normally biased towards the seat frame 4 by a spring 19. The locking plate 6 has a slot 20 which receives the hinge pin 5. In operation, lever 9 is raised until the lobe 13 on member 12 abuts the shoulder 14. At this stage, member 12 has been moved so as to free the locking plate 6 for subsequent movement. Further rotation of lever 9 causes the locking plate 6 to move away from the rack 7, lobe 13 acting as a fulcrum against the internal shoulder 14 to provide the leverage for deflecting plate 6. Plate 6 moves to the limit of slot 20 to disengage its teeth 8 with rack 7. The relative inclination between the back rest frame 3 and the seat frame 4 may now be adjusted. After adjustment, the lever 9 is depressed, moving the locking plate 6 towards the rack 7 and, during the final phase of movement, the member 12 is rotated to lock plate 6 with the teeth in mesh. In the embodiment of Figures 3,4 and 5, a triangular locking plate 22 is mounted for slidable movement relative to a rack 23 secured to the back rest frame 24. Figure 3 shows how a locking plate 22 is supported by an arcuate plate 25 which is secured to a seat frame 26. An operating lever 27 is integral with a transverse member 28 having pins 29, 30 projecting from respective ends. Pin 29 is received in an apertured strip 34 fast with plate 22. Strip 34 is slidably located in a rectangular slot 36 in plate 25. Pin 30 is received in a slot 33 in plate 25. A pin 31, attached to plate 25, passes through a slot 32 in plate 22. Referring to Fig. 5, a hinge pin 37 passes through respective apertures in the quadrant shaped plates 25 and 38 which are secured to the seat frame and back rest frame respectively. In operation, the lever 27 is raised moving pin 30 along the slot 33 thereby releasing the plate 22 to disengage its teeth 39 from the rack 23. When the lever 27 is raised further, the end the slot 33 acts as a fulcrum for pin 30 to cause the locking plate 22 to move slidably towards the hinge axis of pin 37. The teeth 39 are thereby disengaged from the rack 23 allowing adjustment between the back rest frame 24 and the seat frame 26. The teeth are re-meshed by depressing lever 27 to the starting position shown in Figure 4. The lever 27, and/or locking plate 22 are biased so as to maintain meshing engagement between teeth 39 and rack 23. In the embodiment of Figure 6, quadrant shaped plates 41 and 42 are secured to the back rest frame and seat frame of the seat respectively. They are hinged together by a pin (not shown) passing through apertures 43, 44. A locking plate 45 has teeth 46 for engaging the teeth on a rack 47 secured to plate 41. Plate 45 is provided with a slot 48 and a pin 49. Slot 48 receives a hinge pin which passes through apertures 43 and 44. Pin 49 projects through a slot 50 in plate 42 and is received in an aperture 51 in the end portion 52 of a lever 53. Lever 53, which is pivotally mounted on pin 49, extends between an abutment 54 with an arcuate shaped surface 55, and a pin 56. The end portion 52 has an arcuate surface with a projecting nose portion 52'. The nose portion 52' normally engages the arcuate surface 55 of abutment 54 whereby the pin 49, and hence locking plate 45, are urged away from the hinge axis of the quadrant shaped plates 41, 42. When the lever 53 is raised, the nose portion 52' travels past the arcuate surface 55 of abutment 54, releasing the locking plate 45. The lever 53 then abuts pin 56 and, further raising, will cause pin 49, and hence plate 45, to be urged towards the hinge axis of plates 41,42, thereby disengaging teeth 46 from rack 47. The pin 56 acts as a fulcrum to provide the leverage to slide the locking plate 45 on its slot 48. The lever 53 and/or the locking plate 46 may be biased so that the teeth 46 normally engage the rack 47. WHAT WE CLAIM IS:
1. A seat reclining mechanism comprising a pair of plates for respective attachment to a seat frame and a back rest frame, a movable toothed locking element supported by one of said plates, the other plate including a toothed member engageable by said toothed element, and the mechanism including a lever which is adapted to pivot about a first pivot point in a first phase of its movement, thereby to release the movable locking element, and to pivot about a second pivot point, spaced from the first pivot point, during a second phase of its movement, thereby to displace the movable locking element so as to disengage said teeth.
2. A mechanism according to claim 1 in which a portion of the lever is in the form of a cam providing a fulcrum for displacing the movable toothed locking element in one direction of lever movement and acting to secure the movable locking element in an opposite direction of lever movement.
3. A mechanism according to claim 2 wherein the cam is supported for rotable movement in an aperture in the plate including said toothed member.
4. A mechanism according to claim 2 or 3 wherein the end of the lever includes a cam
shaped portion which is pivotally, mounted, to provide the first pivot point, on the movable toothed locking element, the pivot being guided in a slot in the plate which supports the movable toothed locking element, which plate includes a camming track to co-operate with the camming portion of the lever.
5. A mechanism according to claim 4 wherein the second pivot point is provided by a stop fixed to the plate which supports the movable toothed locking element.
6. A mechanism according to claim 1 wherein the lever comprises a portion which pivots about said first pivot point in order to move transversely of a hinge axis between said plates to release the movable toothed locking element.
7. A mechanism according to claim 6 wherein said portion is slidably and pivotally mounted in a pair of slots in the plate which supports the movable toothed locking element, said slots extending in respective directions to enable said transverse movement of the hinge axis to release the movable toothed locking element.
8. A mechanism according to claim 7 wherein said slots extend in substantially perpendicular directions.
9. A mechanism according to claim 8 wherein said portion of the lever includes pivots for each respective slot, said movable toothed locking element being mounted on one of said pivots for slidable movement in the respective slot.
10. A seat reclining mechanism substantially as herein described with reference to Figs. 1 and 2 of the accompanying drawings.
11. A seat reclining mechanism substantially as herein described with reference to Figs. 3, 4 and 5 of the accompanying drawings.
12. A seat reclining mechanism substantially as herein described with reference to Fig. 6 of the accompanying drawings.
GB33263/76A 1977-08-10 1977-08-10 Reclining seat mechanism Expired GB1565695A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB33263/76A GB1565695A (en) 1977-08-10 1977-08-10 Reclining seat mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB33263/76A GB1565695A (en) 1977-08-10 1977-08-10 Reclining seat mechanism

Publications (1)

Publication Number Publication Date
GB1565695A true GB1565695A (en) 1980-04-23

Family

ID=10350661

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33263/76A Expired GB1565695A (en) 1977-08-10 1977-08-10 Reclining seat mechanism

Country Status (1)

Country Link
GB (1) GB1565695A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0043302A1 (en) * 1980-06-27 1982-01-06 A. & M. Cousin et Cie Double articulation means for angularly adjusting a seat back, particularly a motor vehicle seat back
GB2117441A (en) * 1982-03-13 1983-10-12 Ihw Eng Ltd Seat reclining mechanism
FR2530436A1 (en) * 1982-07-22 1984-01-27 Faure Bertrand IMPROVEMENTS ON HINGE RECORDS
EP0698358A3 (en) * 1994-08-17 1996-06-19 Ashfield Eng Co Wexford Ltd A chair tilting mechanism

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0043302A1 (en) * 1980-06-27 1982-01-06 A. & M. Cousin et Cie Double articulation means for angularly adjusting a seat back, particularly a motor vehicle seat back
GB2117441A (en) * 1982-03-13 1983-10-12 Ihw Eng Ltd Seat reclining mechanism
FR2530436A1 (en) * 1982-07-22 1984-01-27 Faure Bertrand IMPROVEMENTS ON HINGE RECORDS
EP0698358A3 (en) * 1994-08-17 1996-06-19 Ashfield Eng Co Wexford Ltd A chair tilting mechanism

Similar Documents

Publication Publication Date Title
US4082352A (en) Seat back recliner
US4502730A (en) Fixed-angle adjusting mechanism
US6007153A (en) Hinge mechanism for a vehicle seat, and a vehicle seat fitted with such a mechanism
US4279442A (en) Reclining seat latch
US5881854A (en) Mechanism for controlling a rotary member by means of a pivoting handle, and a seat fitted with such a mechanism
KR101568891B1 (en) Full memory i-disk
US4645371A (en) Safety joint mechanism, particularly for folding ladders
US7014265B2 (en) Seat device for vehicle
GB2044341A (en) Latch mechanism for a reclining vehicle seat
JPH1175980A (en) Hinge device for car seat and car seat including same
US4435013A (en) Recliner-back tilting mechanism
US4222543A (en) Vertical and angular adjustment device for vehicle seats
US4291856A (en) Assembly of a seat frame, slide rails and a locking device
US20170349064A1 (en) Adjuster with Storage Function of a Vehicle Seat Backrest
EP0450441A2 (en) Automatic release device for seat belts in motor-vehicles or the like
IE40393B1 (en) Vehicle seats
US6234575B1 (en) Longitudinal adjustment device in a vehicle seat, especially for two-door motor vehicles
US4357050A (en) Silent seat back recliner with quick release
GB1565695A (en) Reclining seat mechanism
GB2245021A (en) Casement window fastening
EP1355799B1 (en) Vehicle seat recliner having a sliding pawl
US4301988A (en) Slide structure for a vehicle seat and corresponding seat mount
US4094489A (en) Seat position adjusting means for automobile seat assemblies
US5542162A (en) Buckle for safety belts
US4035866A (en) Seat recliner hinge assembly

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee