FR3055852A1 - SUSPENDED SEAT SEAT - Google Patents

Abstract

Vehicle seat seat (20), provided with: • a link (110) comprising: - a first portion (111) arranged to form a pivot connection with a floor element (50) of a vehicle, - a second portion ( 112) pivotably mounted to the seat cushion and - an anchor (113); An elastic return means; said elastic return means being secured to said anchor (113) as well as to said seat seat (20) so as to recall a rotational movement of said link (110) relative to the seat seat (20) , characterized in that said elastic return means is a linear elastic return means (301).

Description

Holder (s): PEUGEOT CITROEN AUTOMOBILES SA Société anonyme.

Extension request (s)

Agent (s): PEUGEOT CITROEN AUTOMOBILES SA Public limited company.

P4) SUSPENDED SEAT SEAT.

FR 3 055 852 - A1

Seat cushion (20) for a vehicle, provided with: a link (110) comprising:

a first portion (111) arranged to form a pivot connection with a floor element (50) of the vehicle,

- a second portion (112) mounted in pivot connection to the seat cushion and

- an anchor (113);

an elastic return means; said elastic return means being fixed to said anchor (113) as well as to said seat cushion (20) so as to recall a rotational movement of said link (110) relative to the seat cushion (20) , characterized in that said elastic return means is a linear elastic return means (301).

114

Suspended seat cushion The present invention relates generally to a suspended seat cushion for a vehicle. The present invention further relates to a seat comprising such a seat and to a vehicle comprising such a seat.

It is known in the prior art suspended seat seats for filtering the jolts and vibrations generated by automobile traffic. The document FR2801544 describes such a suspension system. On the other hand, this system has the disadvantage of being expensive to manufacture since it includes a large number of nested parts. In addition, this suspension system has very limited travel.

An object of the present invention is to overcome the drawbacks of the document of the prior art mentioned above and in particular to propose a suspended seat cushion inexpensive to manufacture and having a large clearance. An additional object of the present invention is to provide a seat cushion provided with the most compact elements possible in order to facilitate its integration into any type of motor vehicle.

For this, a first aspect of the invention relates to a vehicle seat cushion, provided:

• a link comprising:

a first portion arranged to form a pivot connection with a vehicle floor element,

- a second portion mounted in pivot connection to the seat cushion and

- an anchor;

• an elastic return means;

said elastic return means being fixed to said anchor as well as to said seat cushion so as to recall a rotational movement of said link relative to the seat cushion, characterized in that said elastic return means is a linear elastic return means.

This seat cushion is suspended by inexpensive and very compact elements and can be easily integrated into any type of seat so as to improve user comfort by absorbing the jolts and bumps to which their vehicle is submitted. In addition, the suspension travel is high thanks to the use of a linear elastic return means making it possible to filter out significant shaking.

Advantageously, said seat is provided with a second linear elastic return means comprising two ends, said link comprises a second anchoring and the second linear elastic return means is fixed by a first end to the second anchoring and by a second end to said seat cushion so as to recall a rotational movement of said link relative to the seat cushion. Such a seat cushion provides improved reliability, better resistance to large impacts as well as greater suspension travel.

For example, the anchor and the second anchor are spaced on either side of a plane comprising an axis of the pivot connection of the second portion of said link, which allows an optimal return effect of the link in the two opposite directions of the suspension movement.

A particularly advantageous embodiment consists of a seat cushion further provided with a transmission element fixed to the anchoring and to the second anchoring of said link by means of linear elastic return means and of a pinion mounted in pivot connection to

The seat cushion and said transmission element is meshed on said pinion so as to be able to adjust a height of said seat cushion relative to the floor element.

Such a seat therefore makes it possible to produce a suspension by the linear elastic return means when the pinion is not set in motion, but also benefits from a height adjustment by the rotation of the pinion causing the the latter the transmission element. This embodiment therefore makes it possible to combine two functions which benefit the comfort of the user in a compact system comprising few elements. For example, the transmission element is chosen from a chain or a toothed belt.

Advantageously, the link comprises at least one surface arranged to receive at least a portion of said transmission element in an extreme position of said link relative to the seat cushion, in order to limit the mechanical stresses on the element. transmission and on the linear elastic return means as well as to avoid parasitic displacements of the transmission element.

Advantageously, the seat cushion according to the present invention is further provided with stop means making it possible to limit a rotational movement of said link, in order to preserve the transmission element and / or the linear elastic return means. in the event of a violent shock.

A second aspect of the invention is a vehicle seat comprising a seat cushion according to the first aspect of the invention.

A final aspect of the invention relates to a vehicle comprising a seat cushion according to the first aspect of the invention or a seat according to the second aspect of the invention.

Other features and advantages of the present invention will appear more clearly on reading the detailed description

-4which follows from an embodiment of the invention given by way of nonlimiting example and illustrated by the appended drawings, in which:

FIG. 1 represents a car seat according to the state of the art,

- Figure 2 shows a three-quarter view of a seat cushion according to the present invention in the high position, Figure 3 shows a three-quarter view of a seat cushion according to the present invention in the low position.

1 shows a car seat 1 according to the state of the art 10 comprising a seat cushion 2 and a backrest 3. The seat cushion is connected to the motor vehicle by slides 4 and includes an adjustment system in height 10 making it possible to vary the height of the seat cushion 2 relative to the slides 4 and to the motor vehicle.

The height adjustment system 10 comprises an adjustment rod 15 provided with teeth and a light 12 accommodating a stepped stud 13. The adjustment rod is mounted fixed to a crosspiece 14 itself in pivot connection with the seat cushion 2 and is actuated by an adjustment wheel 15 fixed to the seat cushion 2.

Once installed on the seat, the occupant rotates in one direction or another in the adjustment wheel to move the seat cushion up or down in order to adapt the driving position. to its morphology.

The present invention proposes to replace the height adjustment system 10 according to the prior art described by a suspended seat cushion also offering height adjustment, as shown in Figures 2 and 3.

Figure 2 shows a seat base 20 according to the present invention provided with elements for its suspension. The seat cushion 20 is provided with springs and padding (not shown)

To form a comfortable seat, as is known from the state of the art.

The seat cushion 20 is provided with a rod 110 comprising a first portion 111 mounted in pivot connection on a floor element 40, that is to say an element fixed to the floor of the vehicle as an attachment of seat or slide. The link 110 further comprises a second portion 112 mounted in pivot connection to the seat cushion 20, that is to say fixed on a cross member 140 of the seat cushion mounted in pivot connection with the seat cushion 20 , according to Figure 2. In other words, the rod 110 comprises two fixed pivot points, that is to say non-sliding, one relative to the seat cushion 20 and the other relative to the floor element 40.

In addition, the rod 110 comprises an anchor 113 and a second anchor 114, each spaced on either side of a plane comprising an axis of the pivot connection of the second portion of said rod, either in the figure 2 above and below the cross member 140 of the seat cushion 20. Finally, the link 110 comprises a surface 115 oriented radially with respect to the pivot of the link 110 with the seat cushion 20.

In addition, the rod 110 includes a light 120 having an oblong shape in a semicircle or bean and slidingly receiving a stepped stud 130 fixed to the seat 20. The light 120 and the stepped stud 130 serve to limit a rotational movement of the rod 110 relative to the seat cushion 20 and therefore constitute stop means.

A transmission element 200 in the form of a chain is arranged facing the surface 115, between the two anchors 113 and 114, and fixed to the rod 110 by means of a linear elastic return means 301 and a second linear elastic return means 302 which are coil springs in the representation of FIG. 2. In other words, the linear elastic return means 301, 302 each comprise two ends, one end being attached to an anchor of the link 110 and the other end to the transmission element 200, which makes it possible to resiliently mount the transmission element 200 to the link 110. The link 110 can therefore be driven by limited rotational movements without, however, transmit to the transmission element 200. This transmission element 200 is meshed on a pinion 150 mounted in pivot connection to the seat cushion 20, that is to say that the pin 150 include teeth or notches engaging the links of the transmission element 200 and can be rotated relative to the seat base 20.

Thus, in the case where the vehicle is subjected to a jolt or a bump, the vehicle floor and therefore the floor element 40 are driven in an upward movement, as represented by the vertical arrow of FIG. 2. The link 110 in pivot connection with the seat cushion 20 is then driven in a counterclockwise rotation movement, as represented by the semi-circular arrow in FIG. 2. However, this rotation movement is absorbed by the deformation of the second upper linear elastic return means 302 which carries out the return of the rod 110 at the end of its rotational movement. The lower linear elastic return means 301 maintains a minimum tension level of the transmission element in order to avoid the disengagement of the latter from the pinion 150. The transmission element 200 fixed to the pinion 150 is thus not affected by the movement of the link 110 and the jolt or bump suffered by the vehicle is not transmitted to the seat cushion 20.

Similarly, in the case where the vehicle is traveling in a rut or a slope, the vehicle floor and therefore the floor element 40 are moved downward (not shown), the rod 110 is driven in a clockwise rotation relative to the seat cushion 40 and is recalled by the lower linear elastic return means 301, the second upper linear elastic return means 302 maintaining the engagement of the transmission element 200 with the pinion 150. The link 110, the linear elastic return means 301, 302, the transmission element 200 and the pinion 150 therefore constitute compact and inexpensive elements provided on the seat cushion 20 to allow at least its suspension. relative to the floor element 40. Finally, the clearance authorized by the linear elastic return means is significant.

In addition, the seat cushion 20 according to the present invention also allows height adjustment relative to the floor element 40 and the vehicle (not shown). Thus, the seat cushion 20 shown in FIG. 2 is in an upper extreme position, that is to say that the seat cushion 20 is located in a position as distant as possible from the floor element 40 , with the shoulder stud 130 in contact with the upper edge of the light 120. This high position is suitable for accommodating a small user, in particular allowing him easy access to the vehicle controls and good vision through the glass surfaces of the vehicle. However, a tall user will want to lower the height of the seat cushion 20, that is to say to bring it as close as possible to the floor element 40, in order to be installed at ease.

Thus, it will rotate the pinion 150 counterclockwise, as shown by the semicircular arrow in Figure 3. The pinion 150 will then set in motion the transmission element 200 so as to place the linear elastic return means 301 lower in tension, as visible in FIG. 3. Once this linear elastic return means 301 is placed under stress, the pinion 150 will travel through the transmission means 200 and therefore pivot the link 110 in the counterclockwise, that is to say the direction of the semicircular arrow visible in FIG. 3. The seat base 20 on which the pinion 150 is mounted will then approach the floor element 40 until that the shouldered stud 130 comes into contact with the lower edge of the light 120 and the seat of

-8seat 20 is then in a low extremal position, as shown in FIG. 3.

The stop means, namely the light 120 and the shoulder stud 130, therefore limit the height adjustment of the seat cushion 20, but also serve to preserve the elements of the seat cushion in case significant shock, by transmitting part of the movement to the seat cushion 20 to avoid deterioration of these elements.

The surface 115 of the rod 110 can accommodate at least a portion of the transmission element in the extreme positions of the rod 110, that is to say the high position shown in Figure 2 and the low position shown in FIG. 3. This surface makes it possible to limit in these positions the mechanical stresses undergone by the transmission element and / or the linear elastic return means as well as to avoid parasitic displacements of the transmission element 200 .

The seat 20 according to the present invention therefore allows the reception of a user so as to increase his comfort thanks to its suspension function, but also thanks to its height adjustment function relative to the vehicle. This seat is provided with a small number of elements which are also very compact and it can therefore be integrated into a seat of any type of vehicle in order to perform the two abovementioned functions at a minimum cost.

It will be understood that various modifications and / or improvements obvious to those skilled in the art can be made to the various embodiments of the invention described in the present description without departing from the scope of the invention defined by the appended claims. In particular, reference is made to linear elastic return means which are not limited to coil springs, but also include elastic fasteners, for example made of natural or synthetic elastomer. In addition, the transmission element is not limited to a chain, but can also be a toothed belt or a portion of a sprocket. Finally, this

-9invention can be adapted to seats of any type of vehicle and in particular automobiles, trucks or buses or minibuses.

Claims (10)

1. Vehicle seat cushion (20), provided: • a link (110) comprising: - A first portion (111) arranged to form a 5 pivot connection with a vehicle floor element (40), - a second portion (112) mounted in pivot connection to the seat cushion and - an anchor (113); 10 · an elastic return means; said elastic return means being fixed to said anchor (113) as well as to said seat cushion (20) so as to recall a rotational movement of said link (110) relative to the seat cushion (20) , characterized in that said elastic return means is a means of 15 linear elastic return (301). 2. Seat cushion (20) of vehicle according to the preceding claim, characterized in that it is provided with a second linear elastic return means (302) comprising two ends, in that said link comprises a second anchoring (114 ) and that the second 20 linear elastic return means (302) is fixed by a first end to the second anchor (114) and by a second end to said seat cushion (20) so as to recall a rotational movement of said rod (110) by relative to the seat cushion (20). 3. Vehicle seat cushion (20) according to claim 25 previous, characterized in that the anchor (113) and the second anchor -11 (114) are spaced on either side of a plane comprising an axis of the pivot connection of the second portion (112) of said link (110). 4. Seat cushion (20) of vehicle according to the preceding claim, characterized in that it is further provided with an element of 5 transmission (200) fixed to the anchor (113) and to the second anchor (114) of said link (110) by means of linear elastic return means (301,302) and of a pinion (150) mounted in connection pivot to the seat cushion and in that said transmission element (200) is meshed with said pinion (150) so as to be able to adjust a height of said cushion 10 seat (20) relative to the floor element (40). 5. Seat cushion (20) of a vehicle according to the preceding claim, characterized in that the transmission element (200) is chosen from a chain or a toothed belt. 6. Seat cushion (20) of vehicle according to claim 4 or 5, characterized in that the link (110) comprises at least one surface (115) arranged to receive a portion of said transmission element (200) in a position extreme of said link (110) relative to the seat cushion (20). 7. Seat cushion (20) according to any one of the preceding claims 20, characterized in that it is further provided with stop means (120,130) making it possible to limit a rotational movement of said link (110). 8. Vehicle seat comprising a seat cushion (20) according to any one of the preceding claims. 25 9. Vehicle comprising at least one seat cushion (20) according to one of claims 1 to 7. 10. Vehicle comprising at least one seat according to claim 8. 1/3 Prior art 2/3