FI99102C - Vehicle seat belt system - Google Patents

Description

1 99102

This invention relates to a seat belt system for a car or other vehicle, and more particularly to a system in which the safety of the driver / passenger has been greatly improved by the appropriate and open-minded construction and placement of the seat belt.

10 Today, one of the most commonly used seat belt systems is the so-called a three-point seat belt, which in practice means that the seat belt is fixedly attached at one end to, for example, the door pillar of a car and at the other end it is attached to a part which, by spring force 15, wraps the belt inside it. The belt has a movable buckle structure which is attached to a fixed point on the other attachment points of the person to be tied with the belt, viewed on one side, whereby the belt passes in two straps over the person's pelvis and chest, respectively. The belt is thus fastened 20 at three points, hence its name.

In motorsport, the so-called racing belts, i.e. belts fastened at 4-6 points. The person is supported by separate belts, one of which passes over 25 of each shoulder attached at both ends to the car body and one or two belts pass between the legs of the occupant also: attached to the body. The belts are usually fastened ... * · * to each other at some height from the person's pelvis.

• t ·: * · *: 30 Another solution is known in which a seat is used which consists of a seat part and a backrest part, the pivot point of which is brought clearly forward from the normal point. In addition, the sitter uses. . a seat belt solution consisting of two separate loops, in which the safety belt is attached to the part of the car body, the seat frame structure or the seat part, behind the '·' 'seat of the bench.

Many other solutions are also known which have not reached the stage of practical implementation due to their complexity, discomfort, high cost or overweight. Many known solutions are further troubled by the fact that they still do not provide adequate protection in the event of a collision.

It is an object of the present invention to provide an improvement over the safety problems which have long plagued the prior art and to further improve the force distribution in the event of a collision. In addition, the aim is to provide a solution that allows the design of normal-weight, safe bench solutions, as well as enabling the use of a conventional roller and belt with possible seat belt tensioners.

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The above and other advantages and advantages of the invention are provided as set forth in the appended claims.

The invention will now be described in more detail with reference to the accompanying drawings, in which:

Figure 1 shows a side view of an embodiment of the invention in outline; 25

Fig. 2 shows a perspective view of the same structure and Fig. 3 shows a diagram of the forces prevailing in the system according to the invention in the event of a collision.

30 • · i Thus, Figure 1 shows by way of example and • «· · j’: ’. as a faulty solution, the basic principle of the seat belt system according to the invention. It has a vehicle seat 1,. which in the usual way consists of the actual is— \ '. V 35 support part 2 and the backrest part 3. The seat is fastened to the body of the vehicle by means of a suitable frame structure 4, which is not shown here.

One of the basic principles of the seat belt arrangement according to the invention is to use two separate roller belts for tying a person to the bench 1. The belts 5 pass on the bench 1 over the seated shoulder suitably guided and the separate belt loops can be fastened to each other 5 with a buckle structure 6 .

In previous solutions, double-loop belts have run the risk of the buckle 6 rising upwards and the person slipping out from below. In the present invention, this is prevented in the following manner. The roller structure 51 of the roller belt is attached, for example, to the frame 4 of the bench 1 or to the floor of the vehicle as shown in Fig. 1. The belt 5 rises as its first section 52 to the buckle 6, passes through its loop by making a bend and descends obliquely down to the fastener 7 behind the attachment point of the roller 51 in its second section 53, passes through the loop of the fastener 7 and rises as a third section 54 for example as shown in Fig. 1 , hidden inside the backrest in its uppermost regions 3, from which it folds through a suitable guide 20 to pass as a fourth portion 55 towards the oval 6 to which it attaches. Now the forces acting on the belts in a collision situation balance each other.

Fig. 2 shows the solution according to Fig. 1, but now both belts 5 are shown in the figure. As can be seen from the figure, the person sits on the seat 1 and threads; both belt loops over their shoulders and fasten the halves of the buckle 6 together.

• * · • · • · · * ·; 30 The belts can be fitted with suitable guides to • •, ·. ·. belts rise in the shoulder area up the backrest • · · · ·; ·. from the surface and thus make it easier to put on the belts and also * · «get out of the seat. In the advanced version such-. . The operation of these controls could be controlled by the weight of the person seated in the seat; using, for example, * · '' hydraulics and / or electromechanics.

Figure 2 also shows part of the bench idea *. frame structure. Thus, the bench backrest frame 31, 32 • · · • · 4 99102 could be formed of a shaped steel frame as shown, the articulation point of which is moved to the front in the seat part.

Figure 3 shows a theoretical calculation of some of the 5 forces generated in a standard crash test with a person mass of 75 kg and an acceleration of 30 G. In a cam crash situation, the force on one belt loop is of the order of 11 kN at the belt buckle.

According to the same calculation, a force of 10 7.9 kN is applied from point A to point A, and from point A to point C approximately 11 kN

force. The force between the buckles of the belt is 7.3 kN and the force from point A to point D is approximately zero. Friction is assumed to be zero in the calculations.

15 Collisions are unique in nature and the forces acting in collision situations are therefore very different. However, certain assumptions about the movements of the bench and the person sitting on it in the event of a collision can be made. Depending on the effect on the target, the belt arrangement according to the invention can be modified, for example, so that the position of attachment of the seat belt roll to the frame structures can be varied.

With the seat belt solution according to the invention, the dimensioning of the structures can also be influenced. Thus, it has been calculated that the solution according to the invention achieves essential. the weight of a normal bench. As an example, the weight of a backrest frame of the type shown in Fig. 3 becomes only about 3 kg.

In the seat belt system according to the invention, it is possible to »·« · i *: ·. if desired, use a variety of devices to ensure that the seat belt is taut when the vehicle— •. sufficient deceleration force is applied to the flow. Such intermediate • · · 35 of them so-called. seat belt pretensioners are available in several versions.

«· ·» '*: Another great advantage of the invention is that it is possible to use quite ordinary roller belts with the modification that the fastening of the "free" end of the belt now comes to the buckle and not to the frame structures.

The invention is, of course, not limited to the embodiments shown, but within the scope of the appended claims, the invention can be modified and varied in many ways. Thus, in addition to safety and comfort, several solutions can be used, some of which relate to the bench used with the belt system 10 according to the invention.

The use of an extra belt can be presented as a first variant. This additional belt or part of the belt runs from the floor or frame structures between the legs 15 of the person sitting on the bench and can be fastened, for example, to a buckle 6 or a separate buckle. Otherwise, the belt could be conveniently located in a recess in the seat portion of the bench or it could be secured in a suitable location elsewhere, for example in a bench structure. The extra belt could also be bifurcated.

When using the belt according to the invention, due to the large dispersion of the length of the seats, it is advantageous to provide such a possibility that the height of the seat in relation to the upper support points of the belts can be adjusted. By way of example, this could be done by placing a suitable rail system on the frame of the backrest, along which * · 1; the seat and backrest can be raised and lowered.

There are several alternatives for lifting and lowering. ., .30 systems, such as jack-type hydraulic system, ♦ · «# .Γ.1 system, electromechanical system or manually lockable • ·« * control system.

· • · · ··· '· 1 The invention may also include placing the belt rollers' 35 on the same shaft running from the roller on one side of the bench to the roller on the other edge thereof. This makes it possible to get one · • · one mechanism instead of two, also for the seat belt pretensioner.

• · · • «·« a 6 99102

Contrary to the embodiments shown, it is also possible to place the rollers of the belts in the frame structure in front of the seat, whereby the belts rise from the roll between the legs of the seater.

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It is also possible to place the bench on the dampers, especially for side impacts. One option is for the seat attachment points to be located in a box-like, liquid-filled portion.

10 in which the damper gives in to collisions, damping movements. One type is a perforated body in a fluid whose amount of fluid inside is changed by a collision. Such a damper is used, for example, in boat keels as a collision mitigator.

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Claims (9)

A vehicle seat belt system which can be placed in connection with a vehicle seat (1) and which comprises 5 two seat belt loops / seat belts with buckles or similar means (6) for fastening them to each other, characterized in that the fastening buckle emanating from the roller (51) (6), the free end 10 of the belt loop passing through the upper areas of the support point (7) in the body and the backrest (3) is attached to the buckle (6). 2. A safety system according to claim 1, which comprises a roller (51) in the same direction as the axle of the device, and in particular 15 colors of the bracket and spindle mechanism. Seat belt system according to claim 1, characterized in that the belt rollers (51) are located on the same axis 15 extending from one side of the seat to the other, optionally having a common drive and tensioning mechanism. 3. Säkerhetsbältssystem enligt patentkrav 1, kännetecknat av att säkerhetsbältena bildas av tvä standard 20 rullbälten. Seat belt system according to Claim 1, characterized in that the seat belts consist of two standard roller belts. A security system according to claim 1, comprising a ratchet (51) having a rotary structure or a set of structural construction according to the invention, which comprises a device (5) according to the invention (5), in which case frän sidan. • · · A seat belt system according to claim 1, characterized in that the seat belt rollers (51) are attached to the vehicle or bench frame structures in an area approximately directly below the buckle (6) of the belt (5), in its operating position, when viewed from the side. »* · • ·« «Γ: A seat belt system according to claim 2, · *. *. 30 characterized in that the fastener (7) is located in the area below the backrest * · t (3) for fastening to the frame structures. from above. • a «. . A security device according to any one of the preceding claims. 35 belt system, characterized in that each safety belt comprises a so-called seat belt pretensioner. • (t t '"; A seat belt system according to any one of the preceding claims, characterized in that it further comprises a belt or two belts attached to the frame structures and rising between the legs of the occupant to be fastened to the buckle (6). or a separate buckle. 5. Säkerhetsbältssystem enligt patentkrav 2, känneteck- • · 1 'nat av att fästet (7) is beläget pärädet under ryggs- todet (3) fastgjort vid stomkonstruktionerna. 6. Säkerhetsbältssystem enligt nägot av föregäende patentkrav, kännetecknat av att account de bäda säkerhets-bältena hör en sk. säkerhetsbältets spännare. : 35 7. Säkerhetsbältssystem enligt nägot av föregäende patravav, kännetecknat av att account on the other side of the following: that the construction or rigging is carried out in accordance with the requirements of this article: that separate spanne. 7 99102 8. A security system according to claim 1, which comprises a device according to one of the hundred settings (3). Seat belt system according to Claim 1, characterized in that it is used in connection with a seat structure in which the articulation point of the backrest (3) is clearly displaced from the normal position. Seat belt system according to Claim 8, characterized in that it is used in connection with a seat structure in which the position of the seat part (2) and the backrest (3) in relation to the upper support point of the belts is adjustable. (• · · ··· • • · • · · («· s • #« · • · i:: ·· ♦. ♦ · «f 1 · * · · • · • ♦ · • · · 4 «« • »• · 99102 1.Säkerhetsbältssystem för ett fordon placerbart i samband med fordonets caliber (1) och som innefattar tvä 5 säkerhetsbältslänkar / säkerhetsbälten med ett spänne eller motsvarande medel (6) första varamat medamat in the case of a table with a roller (51) and a genome of spindles (6), a point (7) in the case of a spindle (3), having a spindle (6). 9. A security system according to claim 8, which comprises an apparatus according to the invention with one hundred sets of devices (2) and a guide (3) according to the provisions of the invention. 15 • · · • «· •« · «•« «· · •« · • »· • · · ♦ ♦ 1 R r Jtt t Rilli I tri RH! j · · • ·