JPH0258923B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat structure, particularly a motor vehicle seat structure, with a tiltable backrest.

It is now common to provide a motor vehicle seat structure with a device for adjusting the inclination of the seat back, which adjustment device is mounted between the seat back and the seat body on each side of the seat structure. It consists of two pivoting devices connected by a.
Here the rod is fixed to an element connected to a handle or other control element on each side depending on whether the seat is used for a driver or a passenger of the vehicle.

Adjusters of this type of construction use different arrangements of drive and driven devices, and the predetermined position of the seat structure is predetermined. Therefore, an assembly line in an automobile factory must include an area for supplying the right-hand seat structure and a separate area for supplying the left-hand seat structure.

It is an object of the invention to provide such a structure that the control device of the tiltable backrest can be placed on the right or left side of the seat structure as desired or even reversed. It's about simplification.

Accordingly, the present invention provides a pivot rod for a seat structure terminating in square cross-section ends for rigidly connecting the pivot devices so that they rotate with respect to each other, each square cross-section Both ends are carried by one extension bar. The bar includes two transverse grooves on at least two opposing sides thereof, the grooves receiving one flexible locking hairpin element;
It is connected to the body of said rod via a radial surface forming a contact shoulder.

The rod constructed in this way is strictly symmetrical with respect to its central cross-section and is thus fixed to the drive element at either end of the rod depending on the position of use of the seat structure. It is possible to do so.

The present invention also provides a device for adjusting the inclination of the backrest of a seat structure having two opposing pivots connected for rotation to each other by a pivot rod, the device comprising: is the above 2
The two pivots are symmetrical and have a central hole extending through the interior thereof, with an extension bar at one end of each end of the rod extending from one end of the pivot. while the other bar protrudes from the second pivoting device and is laterally fitted into a control element from which a locking hairpin element fixed in a slot in the bar extends. connected by a rod offset from the

According to a preferred embodiment, said control element has a sleeve with a square inner cross-section that fits over the extension bar of said rod and is provided with two opposite lateral openings through which a locking element is inserted. The branches of the hairpin element are extended.

Since the two pivots are identical and have a hole extending completely through the interior, and the rod is extended by two identical bars, all the parts brought to the assembly line The seat structure may be similar and can be configured as a right-hand seat structure or a left-hand structure depending on the position given to the rods and control handles. Thus, the selection of the side on which said control element is to be mounted can not only be done in the factory when assembling the seat structure, but also at any time on the assembly line of the seat structure without any modification of other elements of the seat structure. obtain.

The present invention will be described in more detail below with reference to the accompanying drawings.

In FIG. 1, a motor vehicle seat structure is shown diagrammatically in the form of a backrest frame 1 and a seat frame 2. In FIG. The frame of the backrest 1 is fixed at each end to a movable arm 4, which is connected via pivot devices 6 and 7 to a fixed arm 8 which is rigidly integrated with the seat frame 2.

The two pivot devices 6 and 7 are rigidly connected by a rod 10.

According to the invention, said pivot devices 6 and 7 are identical and symmetrical with respect to the central plane of the seat structure. Each of the seating structures is further provided with means for defining a stepped aperture, said aperture extending outwardly from the interior of the seating structure. The smallest part 12 of this hole is formed in an element 14 which is rigidly integrated with the movable arm 4 (FIG. 2),
It extends into a slightly larger hole portion 16 within. Within the element 8, the extension 18 of said hole has a larger internal dimension and communicates with the exterior of the pivoting device. At least said holes 12 and 16 have a non-circular cross-sectional shape, preferably square.

As shown in more detail in FIGS. 2 and 3, the rod 10 connecting the two pivoting devices has a body or central portion 20 of circular cross-section, which portion 20 has a rectangular cross-section. into two thinner bars 22, 23. The bar is connected to the cylindrical part 20 via a radially extending contact surface 24 forming an outer shoulder.

Adjacent to the free ends of said bars 22 and 23 at least two parallel slots 26, 27 are formed, which slots extend transversely on opposite sides of the corresponding bars 22, 23.

When assembling the seat structure, the rods 10 extending to the bars 22 and 23 are fitted into and offset from the narrow central holes 12 of the two pivots. One of the bars 23 is only partially fitted into the hole 12 (on the right side in FIG. 2). The bar 23 thus does not extend outwardly beyond the pivot device, in particular its fixed arm 8. On the other hand, the other bar 22 has successive holes 12, 16, 18
fully inserted within and extends outwardly beyond the pivoting device. Note that the corresponding shoulder 24 then engages with the element 14 of the pivoting device.

Engaged on this projecting bar 22 is a sleeve 28 with a square cross-sectional shape, which sleeve has an end that fits into the bore 16 of the element 14. The other end of the sleeve is rigidly integrated with the shifting element 30 and
is constituted by a rotary handle in the illustrated embodiment. Preferably, the handle 30
has a hollow central boss 31 which projects towards and is fixed to the sleeve 28 and which has two opposing openings 32.
have. Each of the openings 32 is located in a lateral lateral region of the sleeve 28. Branches 35, 36 of flexible hairpin element 34 are mounted within opening 32 and engage within opposing slots 26 and 27 of bar 22, so that these branches hold said sleeve and shift element relative to the rod. This results in an axial fixation with respect to the element 14.

The two branches 35 and 3 of said hairpin element 34
6 each have a straight central portion, but while the branches 35 are completely straight, the branches 36 are bent outwards and have two projections 3 each.
8 and 39. One protrusion is close to the curved section 40 of the hairpin element, and the other protrusion is close to the free end of the section 40.

More specifically, as shown in FIG. 4, when the hairpin element 34 is placed, the straight portions engage within the slots 26, 27, and the two protrusions 38 and 39 open the hairpin element 34. 32 to prevent the hairpin element from accidentally slipping out. The shifting element is thus formed in a strictly rigid body with the pivot rod 10 and its extension bar.

Not only is the bar 23 completely identical to and symmetrically arranged with respect to the bar 22, but the pivoting devices are similar and symmetrical so that the rod 10 is oriented in the opposite direction to that shown in FIG. It can be easily offset, and can be made to protrude outward from the right side of the seat structure as shown in FIG. In this case, the shifting element 30 is mounted on the bar 23 and the locking hairpin element 34 is attached to the element 30.
is held stationary on this bar, and the bar 22 is simply inserted into the hole 12 of the other pivot device.

Therefore, during manufacture, it is possible to provide two identical pivoting devices both in the backrest and in the frame of the seat body, so that the rod 10 can be provided with both, independent of the position in which the seat structure is placed. It is possible to slide between the pivot devices. The sliding of the pivoting rod 10 and the installation of the shifting element 30 then takes place on an assembly line which receives only a single type of seat structure, on the right or left side of the seat structure, as appropriate. become. This greatly simplifies and accelerates the manufacturing process.

Furthermore, since the hairpin element 34 is flexibly deflectable and is simply seated within the opening 32 and the slots 26 and 27, the element 34 can be withdrawn from the shifting element at any time;
Once the shifting element has been disassembled, if for some reason it is desired to reverse the controls of the seat structure, after shifting the rod 10 and inserting it into the corresponding aperture 12, 18, the element 34 can be moved e.g. It is possible to place it back in place on the side.

Thus, a device is provided having the maximum possible number of identical parts mounted in opposite positions,
The device allows considerable savings in manufacturing costs and a reduction in the number of different parts to be stored. Assembly is also significantly simplified.

[Brief explanation of drawings]

1 is a schematic perspective view of a motor vehicle seat structure according to the invention; FIG. 2 is a schematic axial sectional view of a device for adjusting the inclination of the backrest of the seat structure of FIG. 1; The figure is an exploded view of the assembly including the rod and shifting element, and FIG. 4 is an elevational view of the shifting element mounted on the rod. 6, 7... Pivoting device, 10... Rod, 20...
... Rod body, 22, 23... Rod bar, 2
4... Contact surface, 26, 27... Division groove, 12, 1
6... hole, 30... handle, 28... sleeve, 32... two openings, 34... hairpin element.

Claims (1)

[Scope of Claims] 1. A device for adjusting the inclination of the backrest of a seat structure, especially a motor vehicle seat structure, which is rotatable relative to each other by pivot rods terminating at both ends of a rectangular cross section. an adjusting device having two opposing pivot devices connected to the device, said two pivot devices being symmetrical and having a device defining a central hole therethrough; , are rigidly connected by a rod consisting of an extension bar having ends of square cross section, each end of square cross section being connected to the body of the rod through a radially extending surface forming a contact shoulder. The rod is connected to the rod and is provided with transverse grooves on two opposite sides, and the rod is laterally offset so that one of the extension bars of the rod is simply connected to the corresponding pivot The lock is simply inserted into the central hole of the device, while the other bar projects from the other pivot device and is inserted into the control element, through which the lock engages in the transverse slot of said bar. An adjusting device characterized in that a locking hairpin element extends. 2. Adjustment device according to claim 1, characterized in that the pivot rod has two extension bars that are symmetrical with respect to the central cross-section of the rod. 3. The adjustment device according to claim 1 or 2, wherein the extension bar has a circular cross-section body with a length smaller than the distance between the two pivot members of the seat structure. An adjusting device characterized in that it is separated by two. 4. The adjusting device according to claim 1, wherein the control element comprises a sleeve of square cross section that fits over the extension bar and for passing the two branches of the locking hairpin element. An adjusting device characterized in that it is provided with two opposing openings. 5. An adjusting device according to any one of claims 1 to 4, wherein the locking hairpin element has two branches extending in generally parallel directions; an adjusting device, one of which forms two outwardly extending projections for locking the hairpin element within the opening of the sleeve. 6. An adjustment device according to any one of claims 1 to 5, in which each pivot device has a device defining a stepped hole, the dimensions of which are similar to the size of the seat. An adjustment device characterized by increasing gradually from the inside to the outside of the structure. 7. An adjustment device according to any one of claims 1 to 6, wherein the control element is a continuously rotatable handle fixed to the sleeve and extending through the sleeve. An adjustment device characterized in that it includes a hollow central boss with two opposing openings. 8. Adjustment device according to any one of claims 1 to 6, characterized in that the control element is a pivoting lever.