WO1998050250A1 - Mecanisme de reglage d'un siege - Google Patents

Mecanisme de reglage d'un siege Download PDF

Info

Publication number
WO1998050250A1
WO1998050250A1 PCT/GB1998/001190 GB9801190W WO9850250A1 WO 1998050250 A1 WO1998050250 A1 WO 1998050250A1 GB 9801190 W GB9801190 W GB 9801190W WO 9850250 A1 WO9850250 A1 WO 9850250A1
Authority
WO
WIPO (PCT)
Prior art keywords
aft
crank
linear positioning
adjustment mechanism
seat
Prior art date
Application number
PCT/GB1998/001190
Other languages
English (en)
Inventor
Francis Edward Craig
Neill Smith
Original Assignee
Magna Seating Systems Limited
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 Magna Seating Systems Limited filed Critical Magna Seating Systems Limited
Priority to GB9923474A priority Critical patent/GB2338408B/en
Priority to AU70682/98A priority patent/AU7068298A/en
Priority to CA002292726A priority patent/CA2292726A1/fr
Priority to DE19882333T priority patent/DE19882333T1/de
Publication of WO1998050250A1 publication Critical patent/WO1998050250A1/fr

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
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
    • B60N2/18—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other
    • B60N2/1803—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other with independent front and/or rear adjustment
    • 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
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
    • B60N2/18—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other
    • B60N2/1807—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other characterised by the cinematic
    • B60N2/181—Rods
    • 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
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
    • B60N2/18—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other
    • B60N2/1885—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other with weight compensating means

Definitions

  • the present invention relates to vehicle seating, and in particular to height and tilt adjustment mechanisms for such seating.
  • the expressions "height” and “tilt” in relation to a vehicle seat refer to the height and tilt of the seat base (upon which the user sits) above the vehicle floor, whether the seat backrest is independent of such seat base positioning or not.
  • Typical simple prior art mechanisms include a single, combined height and tilt adjustment mechanism in which the action of raising the seat also causes the seat to tilt forward to a degree which is dependent upon the degree of height adjustment. Whilst this has advantages in simplicity, it does not offer optimum performance for all users of the seat.
  • Figure 1 shows a perspective view of a seat height and tilt adjustment mechanism according to the present invention, including a seat base frame and seat slides;
  • Figure 2 shows a plan view of the seat adjustment mechanism of figure 1;
  • Figure 3 shows a front view of the seat adjustment mechanism of 5 figure 1;
  • Figure 4 shows a right side view of the seat adjustment mechanism of figure 1 ;
  • FIG. 5 shows a right side view of the seat adjustment mechanism as in figure 4 but with the seating slide rails removed to reveal additional detail of the adjustment mechanism.
  • a combined seat height and tilt adjustment mechanism 10 is mounted onto a pair of slide mechanisms 11 ,
  • Each slide mechanism 11 , 12 includes a fixed portion
  • a seat base frame 15 is attached to the runners 14 via the combined height and tilt adjustment mechanism 10, thereby allowing adjustment of the seat base frame 15 in both the horizontal plane fore and aft, and in the vertical direction as described hereinafter. 0
  • the fore and aft adjustment of the seat is in accordance with known slide mechanisms and will not be described further. Many different types of existing slide mechanisms are fully compatible with the present invention.
  • Each slide mechanism 11 , 12 preferably includes a sidewall 16, 17 which is either integrally formed with the slide mechanism as shown, or attached thereto.
  • the slide mechanisms are each attached to a forward cross-bar 20 and an aft cross-bar 21.
  • the cross-bars are attached to the slide mechanisms by longitudinally-extending lugs 22, 23 which locate in slots 24, 25 in the sidewalls 16, 17.
  • Other fixing techniques are well known.
  • the cross-bars are formed from pressed steel with longitudinal contours for stiffness and are profiled with curved portions 26, 27 (see also figure 3) to provide clearance beneath the cross-bars for slide mechanism components which are not shown.
  • forward cross-bar 20 Attached to the upper surface of forward cross-bar 20 is a pair of upstanding lugs 30, 31 which each receive a respective pivot 34, 35.
  • aft cross-bar 21 attached to the upper surface of aft cross-bar 21 is a pair of upstanding lugs 32, 33 which also each receive a respective pivot 36, 37.
  • the lugs may be attached to the cross-bars by welding or other suitable method, or integrally formed therewith.
  • both forward and aft cross-bars 20, 21 are preferably identical components.
  • a forward crank 40 Attached to forward pivots 34 and 35 is a forward crank 40 which is rotatable about the pivots 34, 35.
  • the crank 40 comprises a crank bar 41 having a first and a second arm 42, 43 at the left and right ends of the crank bar, respectively.
  • the first and second arms 42, 43 provide the connection with pivots 34, 35 enabling the crank 40 to rotate from the position shown in the figures, in a clockwise direction as viewed from the perspective of figures 1 and 4.
  • An intermediate portion 44 of the forward crank bar (see figure 3) is displaced off-axis so that the intermediate portion lies below the level of the forward cross-bar 20.
  • the intermediate portion 44 is not laterally centred with respect to the seat, as shown in figure 3.
  • both forward and aft crank assemblies preferably comprise identical components, although it will be understood that the aft crank assembly is rotated by 180° in the horizontal plane with respect to the forward crank assembly.
  • intermediate portion 54 of the aft crank bar 51 is displaced laterally from the corresponding intermediate portion 44 of the forward crank bar enabling other components to be positioned side by side beneath seat as described hereinafter.
  • Pivotally attached to the first arm 42 and the second arm 43 are, respectively, a first link member 45 and a second link member 46 which are each rigidly attached to and support the forward end of the seat base frame 15.
  • pivotally attached to the third arm 52 and the fourth arm 53 are, respectively, a third link member 55 and a fourth link member 56 which are each rigidly attached to and support the aft end of the seat base frame 15.
  • this degree of freedom could, however, be provided in a number of other ways, for example by allowing the third and fourth link members 55, 56 to also rotate with respect to the seat base frame 15.
  • Other alternatives include providing an additional pivoting link or allowing the seat base frame to be extensible in length.
  • the intermediate portion 44 of the forward crank bar 40 includes a bracket 60 extending rearwardly therefrom which houses a pivot 61 which forms the connection with the moving end 71 of a first linear positioning device 70.
  • the other, fixed, end 72 of the linear positioning device 70 is coupled, by way of a pivot 66 to a pair of downwardly projecting L-shaped brackets 67 on aft cross-bar 21.
  • An analogous arrangement is provided, connected to the intermediate portion 54 of the aft crank bar 50, comprising bracket 62 and pivot 63 forming the connection with the moving end 81 of a second linear positioning device 80.
  • the opposite, fixed, end 82 of the second linear positioning device 80 is connected to a pair of downwardly projecting L- shaped brackets 68 on the forward cross-bar 20 by pivot 69. It will again be appreciated that, for manufacturing simplicity, these components are substantially identical to those associated with the first linear positioning device, but rotated through 180° in the horizontal plane.
  • the linear positioning devices 70, 80 are preferably of the type sold by P L Porter Co as "Mechloks” .
  • the linear positioning device comprises an outer casing 73 with an axially displaceable shaft 74 extending at least partly through the casing 73.
  • a helical coil which is internal to the casing 73 and is therefore not shown, is coupled at one end to the inside of casing 73 and is tightly wound around the shaft 74 so as to provide a strong frictional force preventing axial displacement of the shaft.
  • the other end of the helical coil is coupled to a collar (not shown) which is coaxial with the shaft 74.
  • Each linear positioning device may be provided with pairs of helical coils, within the casing 73, extending along the shaft 74 in opposite directions from the collar so as to increase the holding force available.
  • a release mechanism 75 is provided on the casing 73 of the linear positioning device 70.
  • this release mechanism provides a fixed member 76 coupled to the casing 73 and a moving member 77 coupled to the collar.
  • Fixed member 76 is coupled to the outer sheath 92 of a flexible control cable (figure 2) and moving member 77 is coupled to the inner control wire 91 of the flexible control cable 90, in a manner well known in the art. It will be understood that a series of rigid mechanical linkages could also be used in place of flexible control cables.
  • release of the first linear positioning device 70 enables the forward crank 40 to rotate about its pivots 34, 35 thereby raising or lowering the height of the forward part of the seat base frame 15, while release of the second linear positioning device 80 enables the aft crank 50 to rotate about its pivots 36, 37 thereby raising or lowering the height of the aft part of the seat base frame 15.
  • the actions of the forward and aft cranks 40, 50 are entirely independent and may be operated separately or in unison.
  • linear positioning mechanisms as described are that they are compact and offer large extensibility, as well as being lockable in continuously variable positions rather than in discrete steps.
  • the present height and tilt adjustment mechanism can, however, use other types of linear positioning mechanism which may lock in a plurality of discrete positions.
  • a bias mechanism is provided to counterbalance the weight of the occupant of the seat, so that movement of the seat in an upward direction is effected automatically when one or both the linear positioning devices are unlocked, provided that the occupant of the seat reduces the downward force applied to the seat to less than the upward force provided by the bias mechanism. Adjustment in a downward direction is effected when one or both of the linear positioning devices are unlocked and sufficient weight is applied to the seat to provide a downward force sufficient to overcome the bias mechanism.
  • the bias mechanism is provided independently in each linear positioning device 70, 80, as a compression spring which is coaxial with the shaft 74, 84 around which it resides.
  • the compression spring bears against the moving end 71 , 81 and the casing 73, 83 of the linear positioning device 70, 80 such that when the locking mechanism is released, the device expands in length.
  • the compression spring 89 is shown in figures 1 and 2 only in respect of the second linear positioning device 80, although it will be understood that a similar arrangement is provided on the first linear positioning device 70.
  • the first and second linear positioning devices may be provided with different strengths of compression springs to provide differing amounts of uplift to the front and back part of the seat, to allow for normal weight distribution of the occupant during the adjusting exercise.
  • Both the first and second linear positioning devices 70, 80 are preferably each provided with an independent flexible control cable 90, 95 operating in like manner.
  • the flexible control cables 90, 95 lead to an actuating lever or pair of levers (not shown).
  • a single lever in which operation of the lever in a first direction from a central (home) position pulls on the control wire 91 of the first control cable 90, while the control wire 96 is permitted to free-run through the lever and is thus not actuated.
  • the first linear positioning device 70 is thereby unlocked, and the height of the front of the seat may be adjusted.
  • Return of the lever to the home position is automatic by way of a suitable spring bias, and locks the device 70.
  • Operation of the lever in the opposite direction from the home position pulls on the control wire 96 of the second control cable 95, while the control wire 91 is permitted to free-run through the lever and is thus not actuated.
  • the second linear positioning device 80 is thereby unlocked, and the height of the aft portion of the seat may be adjusted. Return of the lever to the home position is automatic by way of a suitable spring bias, and locks the device 80.
  • a significant benefit of the height and tilt adjustment mechanism described above is that it is quickly and easily adjustable to obtain both the desired height and the desired degree of tilt of the seat using only a single control lever. This is of particular utility in commercial vans where the vehicle may be used by many different drivers throughout the working day, thereby making complex adjustment mechanisms tedious to use and likely to be ignored resulting in poor driving position.
  • a further benefit of the present height and tilt adjustment mechanism 10 is its low cost design, using identical component assemblies for both the forward and aft height adjustment mechanisms. With the exception of the third and fourth link members 55, 56 being provided with slots 58 (which actually form part of the seat base frame 15), all components can be made identical for forward and aft use.
  • a further advantage of the height and tilt adjustment mechanism 10 is its low profile. Particularly in some types of commercial vehicle, where the front seating resides over wheel arches, over the engine bay, or over a housing for other equipment such as the battery, it is important to reduce the depth of the seat adjustment mechanism to a minimum, while simultaneously offering as much height adjustment as possible.
  • the present design provides the height adjustment mechanism which resides entirely beneath the seat, predominantly within the depth of the seating slides. A large vertical travel is possible by efficiently translating the large horizontal expansion of the linear positioning devices into vertical motion through the crank 40, 50 design.
  • crank assemblies 40, 50 have been shown as including a crank bar 41, 51 with a laterally displaced intermediate portion 44, 54, it will be understood that this could be replaced by a straight bar with a further arm extending laterally from the crank bar axis, or by a number of other crank configurations well understood in the art.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)

Abstract

L'invention a trait à un mécanisme de réglage combiné (10) de la hauteur et de l'inclinaison d'un siège de véhicule. Ce mécanisme permet le réglage séparé de la hauteur d'une partie avant du siège et d'une partie arrière du siège, et donc le réglage indépendant de la hauteur et de l'inclinaison du siège. Ce mécanisme comporte, d'une part, une manivelle avant (40) destinée à être couplée à la base (15) d'un siége et conçue pour déplacer la partie avant de la base du siège dans un sens sensiblement vertical et ce, par rotation de la manivelle avant autour d'un premier axe (34, 35), ladite manivelle avant étant couplée à un premier dispositif de positionnement linéaire (70) destiné à bloquer, de manière réversible, la position de ladite manivelle avant; et, d'autre part, une manivelle arrière (50), destinée à être couplée à la base (15) du siège et conçue pour déplacer la partie arrière de la base du siège dans un sens sensiblement vertical et ce par rotation de la manivelle arrière autour d'un second axe (36, 37), ladite manivelle arrière étant couplée à un second dispositif de positionnement linéaire (80) destiné à bloquer, de manière réversible, la position de ladite manivelle arrière.
PCT/GB1998/001190 1997-05-01 1998-04-23 Mecanisme de reglage d'un siege WO1998050250A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB9923474A GB2338408B (en) 1997-05-01 1998-04-23 Seat adjustment mechanism
AU70682/98A AU7068298A (en) 1997-05-01 1998-04-23 Seat adjustment mechanism
CA002292726A CA2292726A1 (fr) 1997-05-01 1998-04-23 Mecanisme de reglage d'un siege
DE19882333T DE19882333T1 (de) 1997-05-01 1998-04-23 Sitzeinstellmechanismus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9708807A GB2324719A (en) 1997-05-01 1997-05-01 Vehicle seat adjustment mechanism
GB9708807.4 1997-05-04

Publications (1)

Publication Number Publication Date
WO1998050250A1 true WO1998050250A1 (fr) 1998-11-12

Family

ID=10811614

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/001190 WO1998050250A1 (fr) 1997-05-01 1998-04-23 Mecanisme de reglage d'un siege

Country Status (5)

Country Link
AU (1) AU7068298A (fr)
CA (1) CA2292726A1 (fr)
DE (1) DE19882333T1 (fr)
GB (1) GB2324719A (fr)
WO (1) WO1998050250A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2810000B1 (fr) 2000-06-09 2004-05-28 Faure Bertrand Equipements Sa Siege de vehicule presentant une assise reglable en hauteur
DE102006043759A1 (de) * 2006-09-13 2008-03-27 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Fahrzeugsitz

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2419988A1 (de) * 1974-04-25 1975-11-06 Daimler Benz Ag Vorrichtung zur neigungs- und/oder hoehenverstellung eines kraftwagensitzes
DE3134608A1 (de) * 1980-10-01 1982-06-09 Aisin Seiki K.K., Kariya, Aichi Vertikal verstellbarer sitz fuer kraftfahrzeuge
US4577730A (en) * 1983-08-30 1986-03-25 P. L. Porter Company Mechanical lock
FR2624451A1 (fr) * 1987-12-14 1989-06-16 Porter Co P L Mecanisme d'ajustement de la position d'un siege
EP0729862A1 (fr) * 1995-02-28 1996-09-04 Ikeda Bussan Co., Ltd. Dispositif de réglage de siège de véhicule

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0618836Y2 (ja) * 1988-09-29 1994-05-18 池田物産株式会社 車両用のシート
GB2224198A (en) * 1988-10-26 1990-05-02 Ford Motor Co Seat positioning mechanism
JPH08244505A (ja) * 1995-03-13 1996-09-24 Ikeda Bussan Co Ltd 座席支持装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2419988A1 (de) * 1974-04-25 1975-11-06 Daimler Benz Ag Vorrichtung zur neigungs- und/oder hoehenverstellung eines kraftwagensitzes
DE3134608A1 (de) * 1980-10-01 1982-06-09 Aisin Seiki K.K., Kariya, Aichi Vertikal verstellbarer sitz fuer kraftfahrzeuge
US4577730A (en) * 1983-08-30 1986-03-25 P. L. Porter Company Mechanical lock
FR2624451A1 (fr) * 1987-12-14 1989-06-16 Porter Co P L Mecanisme d'ajustement de la position d'un siege
EP0729862A1 (fr) * 1995-02-28 1996-09-04 Ikeda Bussan Co., Ltd. Dispositif de réglage de siège de véhicule

Also Published As

Publication number Publication date
GB2324719A (en) 1998-11-04
AU7068298A (en) 1998-11-27
DE19882333T1 (de) 2000-04-27
CA2292726A1 (fr) 1998-11-12
GB9708807D0 (en) 1997-06-25

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