CN1100683C - Car bench seat with reversible backrest - Google Patents

Abstract

A vehicle bench seat with a reversible backrest is divided into two parts. At least one part of the backrest has at least two profiled parts (1, 2). The shaped parts (1, 2) are welded to each other. At least one of the shaped portions is provided with a bead (11, 21).

Description

Car bench seat with reversible backrest

The invention relates to a vehicle bench seat with a reversible backrest, wherein the backrest is divided into two parts.

The bench seat is installed on the back seat in the car. Usually three people can sit. The backrest of the bench seat serves two functions here: on the one hand, it supports the passenger's back when the passenger leans against the backrest during driving; on the other hand, it separates the passenger compartment from the luggage compartment. In order to increase the transport volume of the car, the backrest of the bench seat can be turned over and installed in the car. Separate it additionally for flexibility. Here, the two parts of the backrest are supported at only three points on the vehicle body or the vehicle chassis.

Passive safety for passengers sitting outside the bench seat is ensured by three-point seat belts. Passengers in the middle of the bench seat are currently not sufficiently secured by means of pelvic belts. To increase passive safety, three-point seat belts are also used in modern vehicles for passengers sitting in the middle of the rear seat. In order to ensure the reversibility of the backrest also in this case, the retractor of the central three-point safety belt must be fastened to the backrest. In an accident, the passengers accelerate sharply due to the sudden deceleration of the car. The three-point seat belt resists this acceleration and the consequent forward thrust of the occupant, so that a great force is exerted on the seat belt, which force is transmitted to the backrest via the retractor. This force and the failure of the support of the backrest at a certain point on the body or chassis of the vehicle can lead to snapping of the backrest. The risk of injury to the occupants sitting on the bench seat in an accident is thus increased.

In order to increase the stability of the backrest, it is known to provide a support structure on the backrest. In the undivided reversible backrest, two profiles welded to each other are used, at least one of which has a tubular part to increase the strength of the backrest (see GB-A-22 298 123). In bench seats of the type described, a continuous plate is used for the reversible backrest divided into two parts, which is provided with elongated ribs (cf. US Pat. No. 4,493,505). In another backrest of the type described, in addition to the reinforced pot-shaped rear wall, a bead is also used on the bottom (see DE-U-295 14752). Although the shape is provided with a supporting structure, the stability of the backrest is improved. But the weight of the backrest is increased due to the additional materials used, which will lead to an increase in the mass of the entire car and thus increase fuel consumption.

Here the present invention proposes a remedy. The object of the present invention is to provide a reversible backrest which, without the use of additional support structures, has a high degree of stability and is therefore economical to produce. According to the invention, this object is solved in that at least one part of the backrest has at least two mutually welded profiles, at least one of which is provided with a bead, which is installed in pairs one above the other, wherein The profiled part is joined between the beads by the profiled part back area.

The invention provides a backrest which has a high bending stiffness due to the beading forming a tubular enclosure. Therefore it is warmer and does not require additional support structures, thereby keeping the weight low. Thus reducing the overall car mass and avoiding fuel consumption. Furthermore, the production costs are lower.

The forming part is nearly identical by the paired top-down installation of the beading, which additionally reduces the cost. In addition, the bending stiffness is additionally increased due to the nearly round shape of the enclosure formed by the beading.

In one variant of the invention, the shaped part is produced as a stamped part from sheet metal. This enables the production of the backrest to be inexpensive in terms of production technology, less personal intensive and thus more economical.

In an advantageous development of the invention, the cavity formed by the beading is at least partially foamed. The foam also increases the stability of the backrest.

Advantageously, the foam material is aluminum or solid foam. On the one hand, these materials are very light, so that the weight of the backrest is increased only slightly; on the other hand, they are well adapted to the shape of the cavity.

Advantageously, the shaped parts are welded to one another by seam welding or laser welding. Furthermore, the stability is significantly increased by this type of welding, since tearing at the weld seam, such as, for example, the phenomenon of zippers during spot welding, is avoided.

In another variant of the invention, a trim groove is provided on the periphery of the profiled part. This trim slot is used to secure the material sleeve that fills the rear seat.

In another variant, at least one of the profiled parts is provided with a seat. The mount is used to fasten safety accessories or comfort accessories.

Embodiments of the invention are shown in the accompanying drawings and described in detail below.

Figure 1 is a view of a portion of the backrest;

Fig. 2 is a sectional view along section line A-A of Fig. 1;

Fig. 3 is a sectional view along the section line B-B of Fig. 1;

Fig. 4 is a sectional view along section line C-C of Fig. 1;

Fig. 5 is a sectional view along the section line H-H of Fig. 1;

Fig. 6 is a sectional view along the section line L-L of Fig. 1;

FIG. 7 is a cross-sectional view along section line Z-Z of FIG. 1 .

The part constituting 2/3 of the bench seat back is chosen in the embodiment, which is divided asymmetrically in proportion 1/3 to 2/3. Its shape is substantially rectangular, wherein there is a void on the side facing away from the center line of the backrest. After the backrest has been inserted into the vehicle seat, this recess provides a wheel housing for the respective rear axle of the vehicle.

The backrest part consists of two molded parts 1, 2 welded to each other. In the assembled state of the backrest, the profiled part 2 facing the vehicle chassis has, at its end facing the vehicle chassis, a hinge mount 3 which enables the backrest to be turned over. Towards the support 3, which forms part of the backrest 1/3, a bolt 31 is mounted, by which the two parts of the backrest are connected to each other. The support 3 facing away from the rest has a screw 32 . The bolts 31 and 32 are installed in alignment with each other. Its longitudinal centerline is the axis of rotation of the reversible backrest.

On the projection provided above the recess for the wheel box, the profiled part 2 has a mount 4 for an anchoring device, which is used for the detachable fastening of the backrest to the body or the vehicle. In addition, the profiled part 2 of the backrest has a seat 5 which can be fastened to the backrest by means of the headrest. The headrest can be inserted with its rod 6 into the support 5 . The support 5 is welded to the profiled part 2 . There are two headrests on the part that constitutes 2/3 of the backrest; and one headrest on the part that constitutes 1/3 of the backrest.

Between the two insertion possibilities for the two head restraints, a retractor 7 is provided at the end of the profiled part 2 facing away from the chassis of the vehicle. The retractor 7 belongs to a three-point safety belt, not shown, for the passenger seated in the middle of the rear seat. Its function is to prevent the person protected by the seat belt from rushing forward on the one hand, and to roll up the seat belt automatically when the passenger unbuckles the buckle on the other hand. Furthermore, there are mounts on the backrest, for example for buckles or pivotable armrests. There can also be a socket for charging with a flap on the backrest.

On the periphery of the profiled part 1 there is a trim groove 8 . The trim groove is used to receive the material cover that is laid on the backrest filling surface. The padding surface here is produced from PU foam and forms the padding side of the backrest. The trim groove 8 is formed by a waterproof band with a C-section.

The profiled parts 1, 2 preferably have beadings 11, 21 as in the embodiment, which are mounted one above the other. However, it is also possible for only the profiled part 1 to have the bead 11 or only the profiled part 2 to have the bead 21 , so that another or further beaded profiled parts are welded onto the substantially planar profiled part. Through this welding of the shaped parts with beading, tubular cavities are produced between the shaped parts. The cross-section of the cavity is substantially quadrangular in the embodiment. However, the cross section is not restricted to this shape; instead it can also be a circular, semicircular, elliptical or other polygonal cavity cross section.

The cavity formed between the profiled parts 1 , 2 by the beads 11 , 21 can be partly or completely foamed. Materials can use lighter materials such as aluminum or solid foam. The materials used here must match the shape of the cavity well after foaming.

The beads 11, 21 are arranged substantially helically. In addition to this form it is also possible to arrange the beads in a horizontal, vertical, diagonal, concentric circle or ellipse or similar. The same high backrest stability is achieved with these forms.

The beads 11 of the respectively adjacent profiled part 1 and the beads 21 of the profiled part 2 are connected to each other by means of the profiled back 12 of the profiled part 1 and the profiled back 22 of the profiled part 2 . The profiled parts 1 , 2 are connected to each other by the profiled back 12 , 22 . They are interconnected along the profiled back 12,22. This welding is best done by seam welding or laser welding, as this increases the strength of the backrest.

Claims (8)

1. A vehicle bench seat with a reversible backrest, which is divided into two parts, characterized in that at least one part of the backrest has at least two mutually welded shaped parts (1, 2), wherein at least one of the shaped parts There are crimps (11, 21), and the crimps (11, 21) are installed in pairs up and down, wherein the forming part (1, 2) passes through the back of the forming part ( 12, 22) are interconnected. 2. The bench seat as claimed in claim 1, characterized in that the cavity formed by the beads (11, 21) is at least partially foamed. 3. The bench seat of claim 2, wherein the foamed material is aluminum or solid foam. 4. The bench seat as claimed in one of claims 1 to 3, characterized in that the shaped parts (1, 2) are formed as stamped parts. 5. The bench seat as claimed in one of claims 1 to 4, characterized in that the shaped parts (1, 2) are welded to one another by seam welding or laser welding. 6. The bench seat as claimed in one of claims 1 to 5, characterized in that the welding is done along the profiled portion (12, 22). 7. The bench seat as claimed in one of claims 1 to 6, characterized in that a trim groove (8) is provided on the periphery of the profiled part. 8. The bench seat as claimed in one of claims 1 to 7, characterized in that the profiled part (2) has a support.

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