JPH11235250A - Back rest for automobile seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a back rest by which a person in a back seat is not injured by a fuggage a trunk when a vehicle receive an impact from a front part. SOLUTION: This back rest 12 is constituted of a frame 18 with a packing 20. The frame 18 includes a first sheet 22 consisting of steel plate forming its own surface and is provided with first reinforcing ribs 26 which are formed by the folding of the first sheet. The back rest 12 is also provided with the second sheet 24 consisting of the steel plate which is integrated with the first sheet 22 by pressurizing. The second sheet 24 is provided with the second reinforcing ribs 28 which are formed by folding. The first and the second reinforcing ribs 26 and 28 are almost perpendicularly and mutually crossed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile seat,
In particular, it relates to an improved backseat of the rear seat.

[0002]

BACKGROUND OF THE INVENTION A backrest for a motor vehicle seat of the type consisting of an armature with a matelassure,
The frame includes a sheet of sheet steel (feuille) forming the surface of the frame itself, and reinforcing ribs (nervure de rigidif) formed by folding the sheet.
Car seat backrests of the type with ication) are already known in the prior art.

[0003] Normally, the backrest of the rear seat of an automobile separates the trunk from the occupiable space of the vehicle.

[0004] If the brakes are suddenly activated or a shock is applied to the front of the vehicle, luggage located in the trunk can be violently projected toward the backrest of the rear seat, and therefore the backrest. Risk of injury and injuries to persons sitting in the seats.

[0005] This danger is further exacerbated when the luggage has a shape that can penetrate the seat of the backrest frame.

It is an object of the present invention to provide a durable,
An object of the present invention is to provide a seat back frame that is durable against impact from luggage disposed in a vehicle trunk.

[0007]

For this purpose, the present invention provides:
A backrest for a motor vehicle seat of the type consisting of a frame with padding, said frame comprising a first sheet of steel sheet forming its own surface, formed by folding the first sheet. A backrest of a car seat of the type provided with a first reinforcing rib, wherein the backrest is pressed against the first seat.
A second sheet made of a steel sheet integrated with the first sheet, further comprising a second reinforcing rib formed by folding the second sheet, wherein the first and second sheets are formed.
Are intended to provide a backrest characterized by intersecting each other.

[0008] According to further features of the invention: the first and second reinforcing ribs are substantially orthogonal to one another;

The first sheet delimits the rear surface of the frame and the second sheet delimits the front surface of the frame and retains most of the padding. , The first ribs are substantially horizontal and the second ribs are substantially vertical.

The height of the second rib is such that the free end of the second rib, on which the padding is supported, is oriented inward in a horizontal plane to surround the occupant's fuselage on its seat; Is displaced or changed so as to be substantially included in an imaginaire envelope forming at least one concavely curved concave portion.

The free end of each of the second ribs is bounded by a concave outer surface which curves inward in a vertical plane.

The padding is substantially constant in a direction perpendicular to the second rib so as to conform to the overall shape of the virtual envelope recess by the support by the free end of the second rib. Has a thickness of

The first sheet forms a support for the upper bourrelet of the filling,
An upper extension that extends substantially horizontally and extends beyond the second sheet.

The upper extension forms a support for a tube having at least one headrest.

The backrest separates the luggage trunk of the vehicle from the rideable part;

The first and second sheets are made of a light alloy.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood on reading the description which is given by way of example only and with reference to the accompanying drawings, in which:

FIG. 1 shows a backrest 12 of a rear seat of a vehicle.
This backrest 12 separates the trunk 14 for luggage from the rideable part of the vehicle.

In a conventional manner, the backrest 12 is
It has a frame 18 with zeros.

The frame 18 includes two sheets 22, 24 that are substantially vertical and made of metal steel plate and have a cross section. These two sheets 22, 24 are shown separately in FIGS.

Referring to the normal orientation of the seats in the vehicle, a first seat 22 defines the boundary of the rear surface of the frame 18 (facing the trunk 14) and a second seat 24 defines the frame. The boundary of the front surface (facing the rideable part of the vehicle) is determined. More specifically, the first sheet 22 forms a wall that defines the boundary of the trunk 14, and most of the padding 20 is retained by the second sheet 24.

The two sheets 22, 24 are each plated and mutually interconnected by known methods such as, for example, riveting, welding, auto-agrafage, bonding, and combinations of these methods. It is integrated.

Preferably, to reduce the weight of the backrest, the seats 22, 24 are made of a light alloy such as aluminum.

The sheets 22 and 24 are formed by folding the first and second reinforcing ribs 2 formed by folding these sheets.
6 and 28 are provided. These first and second ribs intersect each other to enhance the rigidity of the frame 18. Preferably, these first and second ribs 2
6, 28 are substantially perpendicular to each other and have a first rib 2
6 is substantially horizontal, and the second rib is substantially vertical.

The ribs 26, 28 have, for example, a substantially trapezoidal cross section.

With particular reference to FIG. 2, the second sheet 24
Are shown in detail, but the height of the second rib 28 is
The free end of these second ribs 28 on which the padding 20 is supported forms a virtual envelope of at least one recess which curves inward in a horizontal plane (plane of FIG. 2). Displaced or changed as included in.

In the example shown, the virtual envelope E
Define the boundaries of the two recesses surrounding the torso of the two occupants on the seat.

The free end of each rib 28 is bounded by an outer surface 28L that is planar, as shown in FIG. 8, or concave, as shown in FIG. In the latter case, the surface 28L is curved inwardly of the vertical plane V so as to enhance the ergonomic aspect of the backrest 12.

The padding 20, in a direction perpendicular to the second ribs 28, conforms to the overall shape of the virtual envelope E with two recesses by the support of the free ends of these ribs 28. Has a substantially constant thickness S.

Referring now to FIGS. 1 and 3, the first sheet 22 projects substantially horizontally to form the second sheet 24 to provide support for the raised portion 32 above the padding 20. Upper extension 30 extending beyond
It has.

This upper extension 30 also forms a support for the mounting means of at least one headrest (not shown). In the example shown, the upward extension 30 forms a support for two pairs of tubes for mounting and supporting the two headrests.

The upper extension 30 has a substantially vertical central portion 30A joining the two approximately horizontal branches 30B.
And has a U-shaped cross section as a whole.

With particular reference to FIGS. 10 and 11, each of the headrest mounting support members in the form of tubes 34, 36 has an upper extension 3 (substantially vertical).
It is shown extending in a direction transverse to zero and across its branch 30B.

Each of the tubes 34, 36 as headrest mounting support members is provided with a central portion 30 of the upward extension 30 by known means, for example, riveting.
Soldered on a lateral raised portion 38 mounted on A.

Referring now specifically to FIGS. 1 and 11,
Two mounting support tubes 36, each associated with a corresponding headrest, have a substantially vertical extension 36P and extend to the extension 30 of the plate 22 towards the bottom of the frame 18. Have been.

Each extension 36P of the mounting support tube
Are cut portions 40 of the reinforcing ribs 28 of the second sheet 24.
Extending across. Most of this extension 36P
The inside of the rib 28 extends substantially parallel to the rib 28.

The frame 18 has an attachment to the vehicle body which forms the legs 42, 44 which are illustrated in detail in FIGS. These legs 42, 44 are integral with the seats 22, 24.

A cable 46 for dispersing the stress caused by the impact on the sheets 22 and 24 is connected to the legs 42 and 44.

In the embodiment illustrated in the drawings,
The backrest 12 has two upper mounting legs 42 and one inner central mounting leg 44. The cable 46 is connected to these three legs 42, 44
Between the substantially horizontal line 46A and the oblique line 46 of the cable.
B to form a substantially equilateral triangle whose boundary is determined by B (see FIG. 1).

The lateral mounting legs 42 are, for example,
It is fixed on the first sheet 22 by known means such as riveting. The lateral legs 42 are intended to be mounted on a part of the vehicle body, which in particular forms lateral struts 48, preferably by means of bolts 50 (see FIG. 4).

The internal mounting legs 44 are fixed on the second seat 24 by means similar to those for the lateral mounting legs. The mounting legs 44 inside this
Are preferably mounted on the floor of the vehicle body by bolts 54 (see FIG. 1).

The cable 46 is formed by fittings 56, 58 whose windings around the corresponding mounting bolts 50, 54 are fastened to the legs 42, 44 by the legs 42, 44 and the corresponding bolts 50, 54. Between the mounting legs.

It has been shown that the overall shape of the legs 42,44 and the fittings 56,58 is due to reinforcements or consoles forming substantially right angles or acute angles.

If necessary, clamp 60
However, the winding loop of the cable 46 may be closed near the corresponding bolts 50, 54 (see especially FIG. 4).

The cable 46 extends across the seats 22, 24 and sometimes on the rear surface of the frame 18 (near the mounting legs 42, 44) and sometimes
Pass over the front surface of the frame across openings 62 or cuts 64 provided in these sheets.

Referring now to FIGS. 8 and 9, the cables 46 are, in particular, the respective oblique lines 46 of the cables.
B extends across the second rib 28 substantially parallel to the front and rear surfaces of the frame 18.

The support tube extensions 36P intersect inside the second ribs 28, and the cable 46 is shown traversing these ribs 28. Therefore, when a rear impact is applied to the seats 22 and 24 of the frame, the cable 46 is connected to the extension 3 of the supporting tube.
It will work with 6P.

Referring also to FIG. 1, similarly, each extension 36P of the supporting tube has a two-wire cable 4 in a horizontal direction 46A and a diagonal direction 46B, such as a mesh or chain.
6 are shown entangled with each other. That is, the extension 36P continuously passes before the horizontal line 46A and then behind the oblique line 46B.

This entanglement allows the headrest to resist torque when the vehicle experiences an impact from behind causing the head of the occupant of the rear seat to project against the headrest.

In another case, the cable 46 may extend across an extension 36P of the support tube 36, as shown in FIG.

The present invention is not limited to the embodiment described above. In particular, the present invention can be applied to a backrest of a seat other than the rear seat of the vehicle.

The effects of the present invention are as follows.

The first and second crossing ribs 26,
28 effectively increases the strength of the frame of the backrest, which will increase the resistance of the backrest when an object is projected towards the backrest.

Further, since the height of the second reinforcing rib 28 is displaced or changed so as to form a concave portion,
Without the use of auxiliary equipment, it is possible to effectively match the filling to the shape of the recess, thereby minimizing the thickness of this filling.

The cable connecting the mounting device of the backrest makes it possible to distribute the stress of the impact received by the backrest over the entire frame of the backrest and to transmit part of this stress to the vehicle body.

When the backrest receives an impact, the cable
By friction and deformation, cooperate with the frame seat,
In some cases, it also cooperates with an extension of the tube for mounting and supporting the headrest to absorb stresses and / or promote distribution of the backrest to the frame.

In this way, when the backrest is impacted, the risk of stress concentrating on a limited portion of the frame seat and penetrating it and damaging the occupant is avoided.

[Brief description of the drawings]

FIG. 1 is an overall view of a seat back of a motor vehicle according to the present invention, with a part thereof removed.

FIG. 2 is a view of the sheet for determining the boundary of the front surface of the frame, as viewed from the direction of arrow 2 in FIG.

FIG. 3 is a side view of the seat that defines the rear surface boundary of the frame.

FIG. 4 is an enlarged view of the mounting device in the lateral direction of the frame from the direction of arrow 4 in FIG. 1;

FIG. 5 is a cross-sectional view in the direction of line 5-5 in FIG. 4;

FIG. 6 is an enlarged view of the lower central mounting device in the direction of arrow 6 in FIG. 1;

FIG. 7 is a sectional view taken along line 7-10 in FIG. 6;

FIG. 8 is a detailed overall view of the reinforcing ribs of the seat that defines the front surface boundary of the frame.

FIG. 9 is a view from the direction of arrow 9 in FIG. 8;

FIG. 10 is a detailed enlarged view of a tube for mounting and supporting the headrest in the direction of arrow 10 in FIG. 1;

FIG. 11 is a detailed enlarged view of another tube for mounting support for the same headrest in the direction of arrow 11 in FIG. 1;

FIG. 12 is a view similar to FIG. 8, but showing a variant for realizing the reinforcing ribs shown in FIG. 8;

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor François Fourie France 45290 Nogent-sur-Vernisson, Avignon-Georges-Banneri 65

Claims (10)

[Claims] 1. Frame (18) with padding (20)
The frame comprises a first sheet (22) of steel plate forming its own surface, and the first sheet (22) is turned up A backrest for a motor vehicle seat having a first reinforcing rib (26) formed, which is pressed against the first seat (22) and is integrated with the first seat (22). A second sheet (24) made of a steel sheet having a second reinforcing rib (28) formed by folding the second sheet (24), the first sheet and the second sheet. Backrest for a motor vehicle seat, characterized in that the reinforcing ribs (26, 28) intersect each other. 2. The backrest according to claim 1, wherein the first and second reinforcing ribs (26, 28) are substantially orthogonal to one another. 3. The backrest according to claim 2, wherein the first seat (22) defines a rear surface of the frame (18) and the second seat (24).
Delimits a front surface of said frame (18);
And, holding most of the padding (20), the first rib (26) is substantially horizontal and the second rib (26) is
The backrest characterized in that the ribs (28) are substantially vertical. 4. The backrest according to claim 3, wherein the height of the second rib (28) is such that the padding (20) is supported on the second rib (28).
Is substantially contained within an imaginary envelope (E) that forms at least one recess that curves inward in a horizontal plane to surround the occupant's torso on the seat. A backrest characterized by being displaced. 5. The backrest according to claim 3, wherein each free end of the second rib (28) has a concave outer surface curved inward in a vertical plane (V). A backrest characterized by a boundary defined by (28L). 6. The backrest according to claim 3, wherein the padding (20) is provided on the second rib (2).
8) with respect to the direction perpendicular to the second rib (2
8) with the support by the free end of the virtual envelope (E), so as to conform to the overall shape consisting of the recesses
A backrest characterized by having a substantially constant thickness. 7. The backrest according to claim 1, wherein the first seat (22) forms a support for a raised portion (32) above the padding (20). A backrest comprising an upper extension (30) projecting substantially horizontally and extending beyond said second seat (24). 8. The backrest according to claim 7, wherein the upper extension forms a support for a tube having at least one headrest. 9. The backrest according to claim 1, wherein a luggage trunk (14) and a rideable part (16) of the vehicle are separated. 10. The backrest according to claim 1, wherein the seats (22, 24) are made of a light alloy.