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
  • B60N2/64—Back-rests or cushions
  • B60N2/66—Lumbar supports
  • B60N2/667—Lumbar supports having flexible support member bowed by applied forces
  • B60N2/6671—Lumbar supports having flexible support member bowed by applied forces with cable actuators

Definitions

• the present invention relates to a seat with adaptable backrest for a person sitting in this seat, to adjust said folder at its back supports. It relates more specifically but not exclusively, a car seat designed to allow a person sitting in it to adjust his lumbar support.
• the object of the invention is therefore more particularly to eliminate these drawbacks by proposing a device for adjusting the back supports and in particular the lumbar supports included in a seat and having no cables or mechanical articulation systems, which makes it possible to simplify the structure of the seat. Adjustable back support and reduce manufacturing costs and thus enhance its economic potential.
• the seat is characterized in that it also comprises:
• At least one generally elastic transverse deformable element extending from one lateral upright to the other and which is coupled to adjustment means comprising an actuating member accessible by the person sitting in the seat;
• Means for exerting on the transverse deformable element a force capable of deforming it as a function of the position of said actuating member are fixed to the corresponding lateral upright of the seat by means of a connection means integral with the actuating member and which is capable of exerting a compression of said deformable element, this connecting means being able particularly but not exclusively, to comprise a screw and a nut in which the aforesaid screw is integral with the aforesaid actuating member.
• the aforesaid adjustment means involve a transverse rod which extends from one lateral upright to the other, close to said transverse deformable element and which is rotatably mounted on said uprights.
• This rod one end of which is integral with the aforesaid actuating member, carries at least one eccentric element provided with a cam surface on which said transverse deformable element bears, so that rotation of the rod causes transverse deformation. corresponding said transverse deformable element.
• Each eccentric element may comprise a helical guiding shape such as a notch, which allows following a rotational movement of said eccentric element, to create a compressive force of the portion of said transverse deformable element which is in contact with said helical guide shape.
• the transverse deformable element may be arranged in the bottom of the folder so that it is at the lumbar level of the person sitting in this seat.
• the back of the aforesaid seat is generally covered and preferably a padding and a cap.
• Figure 1 is a schematic representation of the seat according to the invention with a highlighting of the actuating member.
• FIG. 2 is a diagrammatic representation at an opposite angle of the seat according to the invention as represented in FIG.
• Figure 3 is a schematic representation of the device for adjusting the back supports according to an alternative embodiment of the invention.
• Figure 4 is a schematic representation from below of the device for adjusting the back supports as shown in Figure 3, the transverse deformable element being in the curved position.
• the device according to the invention comprises two pairs of flexible transverse wires 1, 1 which are substantially parallel, these transverse wires 3, 3 'constituting in part species said transverse deformable elements 3, 3 'and are in this case elastic.
• These pairs of son 1, which are placed one above the other, are arranged transversely between the lateral uprights 2, 2 'of a seat.
• each pair of transverse yarns 1 delimits at rest, in a horizontal plane, substantially a rectangular shape, each pair of yarns 1, 1 comprising two son 3, 3 'whose ends can be gripped by a deformable piece (not shown) such as a clip, which advantageously allows to adjust the tension of the assembly.
• Each of the transverse son 3, 3 ' can be connected substantially in the middle to the same junction and holding piece 4 having substantially a parallelepiped shape.
• each of the transverse son 3, 3 ' can be connected substantially in the middle to the same junction and holding piece 4 having substantially a parallelepiped shape.
• each anterior transverse wire 3 can be connected to this junction and holding part 4 by passing through a ring 5 included on the front face of this junction and retaining piece 4;
• Each posterior transverse wire 3 ' can be connected to this junction and retaining piece 4 by engaging in an orifice of horizontal axis passing right through this junction and retaining piece 4.
• Each pair of transverse wires 1, 1 ' is connected at its lateral ends to a connecting means 6 arranged against the inner surface of a corresponding amount 2, 2' of the seat, this connecting means 6 being comparable to a nut.
• Each connecting means 6 has in this case substantially the shape of a coated H, and comprises:
• the device according to the invention also comprises an actuating member such as a wheel 9 disposed near the outer surface of one of said lateral uprights 2 so as to be accessible by the person seated in the seat. seat, this wheel 9 being extended by an at least partially threaded rod engaging in the orifice of the lateral upright 2 of the seat and in that 8 of the connecting means 6 corresponding, the other connecting means 6 which is arranged against the inner surface of the other lateral upright 2 'simply to fix the pairs of transverse son 1, the lateral amount 2' audit.
• an actuating member such as a wheel 9 disposed near the outer surface of one of said lateral uprights 2 so as to be accessible by the person seated in the seat. seat, this wheel 9 being extended by an at least partially threaded rod engaging in the orifice of the lateral upright 2 of the seat and in that 8 of the connecting means 6 corresponding, the other connecting means 6 which is arranged against the inner surface of the other lateral upright 2 'simply to fix the pairs of transverse son 1, the lateral amount
• a rotation printed on the wheel 9 makes it possible to cause a displacement of the connecting means 6 towards the other lateral upright 2 'of said seat, which makes it possible to cause compression and bending of each of said transverse wires 3 , 3 'and in particular of said anterior transverse wires 3, the curvature of these transverse wires 3, 3' depending on the rotation printed on the wheel 9.
• the device according to the invention can comprise:
• a deformable transverse element which can be elastic such as a flexible transverse wire 3 placed in front of said rod 10 and which is arranged in the rest position in a plane substantially parallel to the latter, this deformable transverse element 3 comprising respectively at each of its ends , an inverted Z and Z-shaped portion so that the core 13, 14 of each of said Zs is in contact and in the axis of a corresponding notch 12 of an eccentric element 11.
• said deformable transverse element 3 may be one of the transverse elements of a dorsal suspension ply (not shown) extending between the lateral uprights 2, 2 'of the seat back.

Landscapes

• Engineering & Computer Science (AREA)
• Aviation & Aerospace Engineering (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Chair Legs, Seat Parts, And Backrests (AREA)
• Seats For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=37972563

Family Applications (1)

Country Status (3)

Families Citing this family (1)

Citations (2)

Family Cites Families (4)

• 2006
  • 2006-08-24 FR FR0607486A patent/FR2905056B1/fr not_active Expired - Fee Related
• 2007
  • 2007-08-22 EP EP07823439A patent/EP2054267A2/de not_active Withdrawn
  • 2007-08-22 WO PCT/FR2007/001391 patent/WO2008023119A2/fr not_active Ceased

Patent Citations (2)

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