CN109515371B

CN109515371B - Seat belt webbing and seat belt system

Info

Publication number: CN109515371B
Application number: CN201710846074.0A
Authority: CN
Inventors: 韩勇; 吴征; 王振飞; 韦可钊; 张玥
Original assignee: TRW Automotive Technologies Shanghai Co Ltd
Current assignee: Zeifu Automotive Technology Shanghai Co ltd
Priority date: 2017-09-19
Filing date: 2017-09-19
Publication date: 2021-11-02
Anticipated expiration: 2037-09-19
Also published as: CN109515371A; WO2019056894A1

Abstract

The invention relates to a belt strap and a seat belt system having such a belt strap, comprising a housing part (11), an enveloping part (13) and an inflation part (12), the belt strap being configured such that: in a first operating state, the cover element encloses the folded enveloping part and the folded uninflated inflatable part, so that the belt strip is formed in a strip-like manner; and in a second operating state the inflatable element is explosively inflated, the cover element uncovers the envelope and the inflatable element, which are deployed in the transverse direction of the belt webbing on one or both sides of the belt webbing, the deployed envelope providing an envelope surface for the user either alone or together with the deployed inflatable element or the remaining cover element or together with the deployed inflatable element and the remaining cover element.

Description

Seat belt webbing and seat belt system

Technical Field

The invention relates to a belt strap for a seat belt system of a vehicle, in particular for a motor vehicle. The invention also relates to a seat belt system for a vehicle, in particular for a motor vehicle.

Background

Inflatable seat belt systems for motor vehicles are known from the prior art, which are used to protect the occupant in the event of a crash. In these inflatable seat belt systems, an airbag is provided in the belt webbing. For example, in the event of a collision accident, the gas generator is ignited, and the gas generated by the gas generator is rapidly filled into the air bag, so that the air bag is rapidly inflated, and the inflated air bag cushions a user, thereby reducing or even avoiding the user from being injured due to the collision accident. Such seat belt systems provide better protection for the user than conventional non-inflatable seat belt systems. Such a seat belt system for a motor vehicle is disclosed in patent documents US20170106828A and US2015069741a1, respectively. The inflatable belt webbing of such seat belt systems remains webbing-like after inflation.

Disclosure of Invention

The inventors of the present application have found that in the seat belt systems known from the above-mentioned prior art, there is a risk of the belt webbing slipping off the user during a rapid deceleration of the vehicle, for example in a crash or rollover accident, in particular in the case of twisting of the user's torso. For example, in the event of a vehicle collision, the belt webbing is not effectively prevented from moving on the body of the user, which may result in the belt webbing moving up, for example, to catch on the neck of the user and thus cause additional injury to the user, or even slipping off completely from the body of the user, and thus no longer providing protection to the user. In addition, the airbag may also cause injury to the user during the process of explosive inflation.

The object of the present invention is therefore to provide a belt strap for a vehicle and a seat belt system comprising such a belt strap, by means of which the body of the user can be better restrained and thus better protected during rapid deceleration of the vehicle, in particular during a motor vehicle crash or rollover accident.

The above object is achieved by a belt strap for a seat belt system of a vehicle, in particular a motor vehicle, comprising a housing part, an envelope part and an inflation part, the belt strap being configured to:

in a first operating state, the cover element encloses the folded enveloping part and the folded uninflated inflatable part, so that the belt strap is formed in a strip-like manner, the cover element being able to absorb the operating load exerted by the user during normal operation of the vehicle; and is

In the second operating state, in which the inflation component is inflated in an explosion-blown manner, the cover element uncovers the envelope and the inflation component, which are deployed in the transverse direction of the belt webbing on one or both sides of the belt webbing, the deployed envelope alone, or together with the deployed inflation component or the remaining cover element, or together with the deployed inflation component and the remaining cover element, providing the user with an envelope surface, the deployed envelope alone, or together with the deployed inflation component or the remaining cover element, or together with the deployed inflation component and the remaining cover element, being able to withstand the operating load exerted by the user, it being preferred that: in the second operating condition, the unfolded envelope alone provides the envelope for the user and the unfolded envelope bears most or all, in particular more than 80%, for example 90% or 95%, of the working load applied by the user.

According to the invention, the belt strap in the first operating state corresponds to a conventional non-inflatable belt strap, but in the second operating state, unlike conventional non-inflatable belt straps and inflatable belt straps known to date, it no longer functions in a belt-like manner and envelopes a larger area of the torso of the user with an envelope surface, which on the one hand improves the force-bearing capacity of the user and on the other hand prevents the belt strap from slipping off the body of the user.

In the present invention, the main function of the inflation component is to cause the envelope to expand in the second operating state and thus form an envelope surface, the envelope itself bearing a large part of the workload, even the entire workload, whereas the inflation component itself may bear only a small part of the workload, even none at all, in an auxiliary manner. After the deployment of the envelope is achieved, the inflatable element may continue to maintain the inflated state, may also partially or completely lose the inflated state, or may even no longer be present. The same applies to the cover part, which in the second state can remain present, bearing only a small part of the workload, or even no workload at all, in a complementary manner; or may no longer be present.

According to a preferred embodiment of the invention, the inflation part and the enveloping part are separate parts, and in the second operating state, the expansion of the inflation part drives the expansion of the enveloping part; or the inflatable part and the envelope are integral parts of each other.

According to a preferred embodiment of the invention, the enveloping member is a net-shaped member or a planar member, or a combination of a net-shaped member and a planar member; it is preferable that: the mesh of the mesh is triangular, quadrilateral, pentagonal, hexagonal or any other suitable shape. In the case of a flat element, the enveloping element can be produced, for example, from a woven or nonwoven material as a continuous non-porous web or an apertured web, preferably calendered, so that it can be more easily expanded by the inflatable element in the second operating state.

It is particularly advantageous if the enveloping element is made of an elastic material, so that the enveloping element, which is extended in the second operating state, has a damping function. In the second operating state, the envelope provides cushioning to the user, either alone or with the aid of the inflatable member. In this connection, the damping function can be compared, in particular at least equal or superior, to that of the airbag of the inflatable belt webbing known from the prior art. Alternatively, it is also possible that the envelope element is made of a non-elastic material or is only partly elastic.

In accordance with a preferred embodiment of the present invention, the inflatable member includes at least one first member extending longitudinally and at least one second member extending at an angle to the first member, the at least one first member being in internal communication with the at least one second member; the envelope is connected at its outer edges to respective ends of the second part of the inflatable part; in a second operating state, the inflation component is inflated in an explosion-blown manner, so that the inflation component is deployed in the transverse direction of the belt webbing on one or both sides of the belt webbing and thus drives the enveloping part to deploy; it is preferable that: the inflation component comprises exactly one first component which extends centrally in the longitudinal direction of the belt webbing and at least one, in particular exactly two, three or four, second components on both sides of the first component; it is preferable that: the number of the enveloping parts is just one layer or just two layers and the enveloping parts clamp the inflating parts.

According to a preferred embodiment of the invention, the angle formed by the second component and the first component is 10 ° to 170 °, preferably 30 ° to 150 °, in particular 60 ° to 120 °, particularly preferably 80 ° to 100 °, for example approximately 90 °.

In a preferred embodiment of the invention, the belt webbing comprises a load carrying cable attached to the envelope or to the inflatable part, which load carrying cable together with the envelope in the second operating state carries most or all of the operating load exerted by the user, in particular the load carrying cable is made of an elastic material, so that the load carrying cable has a damping function in the second operating state; it is preferable that: the load carrying cable is formed by or arranged along the outer edge of the envelope; it is also preferred that: the bearing rope is a nylon rope or a flexible rope consisting of a flexible metal wire core part and a flexible outer sleeve; it is also preferred that: the support cable comprises a cavity which can be filled explosively, in particular which forms the gas-filled part or forms a component of the gas-filled part, preferably a flexible wire core being arranged in the cavity. The carrier cable can be a separate inflatable or non-inflatable part or can be an integrated part with the envelope element and/or the inflation part. The carrier cable is not limited to being arranged on the outer edge of the envelope, but alternatively or additionally, it is also possible to arrange the carrier cable elsewhere, for example, also transversely or transversely to the envelope.

In a preferred embodiment of the invention, the belt strap is held in the first operating state in a belt-like manner by a seam, which in the second operating state can be broken by a bursting inflation of the inflation element. The sewing technique itself has been widely adopted in existing safety bags. Alternatively or additionally, bonding techniques or welding techniques, such as ultrasonic welding techniques or the like, may be used.

In a preferred embodiment of the invention, the enveloping part has a spindle-shaped contour in the deployed state, wherein the width of the enveloping part increases first and then decreases in the longitudinal direction of the belt strap from one end of the enveloping part to the other end, or the enveloping part has an oval contour or a rounded quadrilateral contour in the deployed state; and/or the maximum width of the enveloping part in the deployed state is at least 2 times, preferably at least 3 times, in particular at least 4 times, for example 5 times or 6 times, preferably less than 10 times, for example less than 9 times, 8 times or 7 times the width of the seatbelt part in the first state. Here, the width of the envelope in the unfolded state can be determined in such a way that: the width dimension of the projection of the unfolded envelope over the maximum projected area, or the width dimension measured on the body of a predetermined DUMMY, which DUMMY may be any DUMMY known from the prior art, in particular a DUMMY complying with an industry standard or a national standard, in particular a THOR DUMMY.

The object is also achieved by a seat belt system for a vehicle, in particular a motor vehicle, comprising a gas generator which can be ignited and a belt strap according to the invention, the inflation component of which is connected to the gas generator. Gas generators are known per se from prior art airbags, which are usually based on pyrotechnic technology, which, when ignited, produce and release gas in a short time and in a rapid manner.

In a preferred embodiment of the invention, the seat belt system comprises a height and/or angle adjustment device for adjusting the height position and/or the angle position of a guide element, over which the belt webbing is guided; it is preferable that: the height and/or angle adjustment means comprises a guide rail and comprises a gimbal mechanism or a ball joint mechanism which is connected to the guide rail on one side, is movable between the two ends of the guide rail and is biased towards one end of the guide rail by a resilient member; and is connected with a guide piece on the other side, and the guide rail preferably has a stroke length of 60-80 mm.

In a preferred embodiment of the invention, the seat belt system is for a motor vehicle, the envelope is a web made of an elastic material, the outer edges of the web constitute or are provided with elastic load-bearing cords, the web in the second operating state alone provides an envelope for the user, the envelope enveloping the shoulders, chest and abdomen of the user, the inflation part and the envelope are separate parts from each other; in the mounted state of the seatbelt strap in the motor vehicle, the seatbelt strap is connected above via the gas generator to the guide piece and can be engaged and disengaged again below from a catch provided in the motor vehicle, the guide piece is in turn connected to the body of the motor vehicle via a height and/or angle adjustment device, and the guide piece is formed by the housing of the gas generator or is fixedly connected to the housing of the gas generator; the height and/or angle adjustment means comprises a guide rail and comprises a gimbal mechanism or a ball joint mechanism which is connected to the guide rail on one side, is movable between the two ends of the guide rail and is biased towards one end of the guide rail by a resilient member; and the other side of the guide rail is connected with a guide piece, and the guide rail has a stroke length of 60-80 mm. The technical measures combine the advantages already mentioned above.

The height and/or angle adjustment device of the invention can also be claimed independently of the belt strap. By means of the height and/or angle adjustment device according to the invention, it is ensured that the guide element guides the belt webbing at a suitable angle, irrespective of the size of the user. This is particularly advantageous in the second operating state, in order to avoid that the envelope element does not spread out sufficiently at an unfavourable angle.

According to a preferred embodiment of the invention, the inflatable element is made of a polymeric material, such as polyethylene terephthalate, preferably polyamide, which has high strength, excellent resistance to ageing, high temperature, good spinnability, etc.

According to a preferred embodiment of the invention, the gas generator further comprises a gas guide, via which the gas generator is connected to the inflation element, wherein preferably the gas guide has a multilayer structure and preferably the gas guide is made of a high temperature resistant material. This ensures that the gas guide is not damaged when guiding the high-temperature gas that is exploded out of the gas generator, and thus ensures that the gas can pass through the gas guide smoothly into the inflator.

According to a preferred embodiment of the invention, the gas generator furthermore comprises a plate which is arranged inside the generator housing and is preferably made of metal. The plate can effectively increase the strength of the gas generator, and therefore, the gas generator is not easy to deform or damage when gas is detonated.

The features mentioned in the description of the invention and in the claims can be combined with one another as desired, provided that they are not mutually inconsistent. These combinations of technical features are also technical contents described in the description of the present invention.

Drawings

The belt strap and the seat belt system according to the invention are explained in more detail below with the aid of the figures. The attached drawings are as follows:

fig. 1 shows a perspective view of a seat belt webbing according to the invention, in which the inflation element is in a first operating state;

fig. 2 shows a perspective view of the seatbelt webbing in accordance with the present invention, wherein the inflation element is in a second operating state;

FIGS. 3A through 3D illustrate schematic views of an inflation element according to various embodiments of the invention;

fig. 4A to 4E show schematic views of an envelope, in particular a mesh, according to different embodiments of the invention;

figure 5 shows a schematic view of a height and/or angle adjustment device of a seat belt system.

Detailed Description

In the drawings, identical or functionally identical components are denoted by the same reference numerals. It is to be understood that the invention is not limited to the specific embodiments shown in the drawings and described in the specification.

Fig. 1 shows a seat belt strap 1 according to the invention in a perspective view. In the present exemplary embodiment, the belt strap 1 is used in a seat belt system of a motor vehicle. Of course, the belt strap may also be used in a seat belt system for an aircraft, ship or similar vehicle.

In fig. 1, the belt strap 1 is in a first operating state and can operate as a conventional belt strap. The belt strap 1 is guided at the top by a guide 3 of the seat belt system, which guide 3 is connected to the body of the motor vehicle via a height and/or angle adjustment device 4. The harness strap 1 forms a belt-like restraint to the user's body. The outer cover part 11 of the belt strap 1 is visible in fig. 1. The uninflated inflation element 12 and the enveloping element 13 of the belt strap 1 are folded over inside the housing part 11 and are therefore not visible. The individual components of the belt strap 1 are held in the form of a belt by means of stitching. The enveloping part 13 is designed here as a net. It is also possible for the enveloping part 13 to be formed as a web element from a woven or nonwoven material, which may be continuous and free of holes or may be a web element with through-openings, for example round or square holes.

Fig. 2 shows the seat belt strap 1 according to fig. 1 in a second operating state in a perspective view. At this time, the inflator 2 of the seat belt system is ignited, and thus the inflator 12 connected to the inflator 2 is ignited, the sewing thread is broken, the cover member 11 releases the restraint of the inflator 12 and the enveloping member 13, and the inflator 12 is deployed on both sides of the belt webbing in the transverse direction of the belt webbing, and thus the enveloping member 13 is brought to be deployed together. The deployed envelope 13, alone or in combination with the deployed inflatable member 12, provides an envelope for the user, which is capable of withstanding the workload imposed by the user, wherein the envelope bears most or all of the workload.

The outer mantle element 11 is not depicted in fig. 2. In the second operating state, the cover element 11 can either be destroyed and removed, or can be completely or partially retained, or can no longer have load-bearing capacity or be completely or partially retained.

In the embodiment shown in FIGS. 1 and 2, the inflatable element 12 is made of nylon 66, although the inflatable element 12 may be made of other suitable materials, such as polyethylene terephthalate or polyamide or other polymeric materials. The enveloping member 13 is made of nylon rope or may also be made of other flexible materials.

In the first operating condition, the inflation element 12 and the envelope 13 are accommodated folded in the housing part 11, the housing part 11 being sewn, glued or otherwise releasably connected on the outside thereof to enclose the inflation element 12 and the envelope 13 therein, the releasable connection being such that, when the inflation element is inflated in a squib, the housing part 11 can be easily destroyed at its connection point and no longer constrains the inflation element 12 and the envelope 13.

As can be seen in fig. 2, the inflatable element 12 comprises a central first part 12a extending in the longitudinal direction and four second parts 12b extending at approximately 90 ° to the first part 12a on both sides of the first part. Of course, the inflatable element 12 may also include two, three, or any other number of first components 12a and/or include only one, two, three, or any other number of second components 12 b. The angle between the first part 12a and each second part 12b may be different.

The first component 12a and the respective second component 12b are in communication with one another inside such that the first component and the respective second component 12b can be filled with gas, for example via the first component 12a into the second component 12 b. Further, the gas filling port may be provided at other positions.

It is possible that a ring-shaped part is provided on each end of the second part 12b remote from the first part 12b, through which the envelope 13 passes at its outer edge, thereby connecting with each end of the second part 12b of the pneumatic element 12. Of course, the envelope 13 and the inflatable element 12 may also be connected by other connecting means, such as gluing, winding, bolting, etc.

Fig. 2 also shows a load carrier cable 14, which is attached to the outer edge of the enveloping element 13 or can also be formed directly from the outer edge of the enveloping element 13. Here, the load carrying rope 14 may be a nylon rope. Alternatively, it is also possible for the support cable 14 to have not only a support function but also an explosion-type inflation function, in other words, the support cable 14 can also form part of or all of the inflation element 12.

In the exemplary embodiment shown in fig. 1 and 2, the seatbelt strap 1 is connected above via the gas generator 2 to the guide 3, which in turn is connected to the body of the motor vehicle via a height and/or angle adjustment device 4. The belt strap 1 is therefore not a conventional belt strap of the retracting type above. Fig. 1 and 2 also show a further belt strap 5, which is retractable and is connected to the belt strap 1. The two belt straps 1, 5 can be engaged and disengaged again from the catch 6 at a common end. In this case, it is particularly advantageous if the guide 3 can be formed by the gas generator 2, more particularly by the housing of the gas generator 2 or is a component of said housing. It is also possible for the guide part 3 to be a separate component and to be connected to the housing of the gas generator, in particular fixedly connected to one another.

Alternatively, the belt strap 1 can also be retractable above. In this case, the guide 3 may have, for example, an elongated rectangular through-hole for the belt strap 1 to pass through and guide the belt strap 1. In this case, it is particularly advantageous if the gas generator 2 is arranged at the lower end of the seatbelt strap 1.

It is also technically possible for the gas generator to be integrated centrally or distributed in the gas filling element and to be able to be triggered or detonated by an external, predetermined signal by means of a wireless connection.

Additionally, various embodiments of inflation element 12 are depicted in FIGS. 3A-3D. It can be seen here that the first part 12a and the second part 12b of the inflation element 12 can extend at different angles. And the first part 12a may have a cross section that gradually decreases from the top to the bottom so that gas can be rapidly filled into the interior of the inflating member 12 from the top to the bottom. Of course, it is also possible for the first part 12a to have a cross section which tapers from below to above, so that, with the gas generator arranged below, gas can advantageously fill the interior of the gas-filled element 12 from below to above.

Fig. 4A to 4E schematically show several specific embodiments of the enveloping part 13 of the belt strap 1. In fig. 4 it can be seen that the envelope 13 comprises an outer loop portion and an inner woven portion, wherein the loop portion and the woven portion are preferably constructed in one piece, but may also be constructed separately and connected together. Here, the loop portion is connected to the second part 12b of the inflation element 12, and the woven portion may have, for example, a fishing net-like, spider-net-like, honeycomb-like, or the like structure. For example, in the event of a crash, a large part of the torso of the user, for example the shoulders, the chest and the abdomen, can be restrained and thus well protected on the basis of the envelope 13. In addition, since the net member can substantially envelop one side shoulder of the user in the second operating state, the user is not easily twisted due to its own inertia, thereby preventing the user from being injured further and reliably preventing the webbing member from slipping off the user's body.

The inflation part 12 and the envelope 13 are shown schematically in fig. 3A to 3D and in fig. 4A to 4E separately from each other. However, it is also possible to form the inflation part 12 and the enveloping part 13 or the mesh in one piece. It is possible, for example, as a variant, that a part or all of the enveloping element 13 shown in fig. 4A to 4D, for example the outer edge, may alternatively or additionally be constructed, for example one or more circular lines in fig. 4C, as a result of which the gas can be explosively inflated.

It goes without saying that the inflation part 12 and the enveloping part 13 are not limited to the embodiments shown in fig. 3A to 3D and in fig. 4A to 4E. For example, inflatable member 12 may also have a circular or elliptical shape in the deployed state, and may additionally include one or more fingers extending outwardly from the circular or elliptical shape.

It should also be noted that the inflatable element 12 and the enveloping member 13 are preferably curved three-dimensionally and conform to the body shape of the intended user, for example a dummy. The plan views in fig. 3A to 3D and in fig. 4A to 4E are merely schematic.

The seat belt system 1 according to the invention comprises the above-described belt strap 1 and the gas generator 2.

The gas generator 2 is intended to be able to be ignited, for example by an electronic control unit ECU of the vehicle, in the event of a vehicle impact or crash, for example. The gas generated by the gas generator 2 is rapidly charged into the inflating member 12. According to a particular configuration, the gas generator 2 can comprise a gas generator housing and a gas generator seal, for example made of rubber material, which is arranged at the connection of the gas generator housing. The gas generator 2 can be connected either directly to the inflation element 12 or via a separate gas guide to the inflation element 12. Here, the gas guide may be of the same material as the inflator 12 and may have a multi-layered, for example, double-layered or triple-layered structure, so that the high-temperature gas generated when the gas generator is ignited does not damage the gas guide.

The gas generator 2 may further include a reinforcement plate provided inside the gas generator case for reinforcing the strength and rigidity of the entire gas generator 2. The reinforcement plate can be formed as a sheet metal part, for example.

Fig. 5 shows an exemplary embodiment of a height and/or angle adjustment device 4 of a seat belt system according to the invention. As can be seen in fig. 5, the height and/or angle adjustment device 4 comprises a guide rail 4a arranged on the motor vehicle body and comprises a universal joint mechanism 4 b. The gimbal mechanism 4b is connected on one side to the guide rail 4a and on the other side to the guide 3. The side of the joint mechanism 4b connected to the guide rail 4a can be displaced along the guide rail 4a and is biased towards one end by a spring element, so that the side of the joint mechanism 4b connected to the guide rail 4a can only be displaced downwards out of the upper initial position if a predetermined load is exceeded, and for this purpose the force of the spring element, in particular a force increasing with displacement, has to be overcome. The resilient member may be, for example, a coil spring or a belleville spring, such as a compression or coil spring.

It is particularly advantageous if the guide rail 4a has a stroke length of 20 to 120mm, in particular 40 to 100mm, in particular 60 to 80mm, so that the user can be restrained particularly well by the safety belt without having to have too great a freedom of movement and thus causing potential safety risks.

It is also possible that the side of the gimbal mechanism 4b that is connected to the guide rail 4a can be locked at any one of a plurality of predetermined positions in the guide rail by means of a locking mechanism, or can be fixed at any one of the positions in the guide rail. Alternatively, a ball-joint mechanism may be used instead of the gimbal mechanism 4 b.

It is also possible to provide the height and/or angle adjustment device 4 with a stroke length limitation. For example, a bolt and a hole matching the bolt may be provided on the guide rail 4 a. When the bolt is inserted into the mating hole, the available stroke length of the guide rail 4a is reduced from the initial stroke length accordingly, for example from 100mm to 80mm or 60 mm. The stroke length limiting mechanism can be operated by the user of the motor vehicle according to the requirement of the user.

Claims

1. A belt strap for a seat belt system of a vehicle, characterized in that the belt strap (1) comprises a housing part (11), an enveloping part (13) and an inflation part (12), the belt strap (1) being configured to:

in a first operating state, the cover element (11) encloses the folded enveloping part (13) and the folded uninflated inflatable part (12) such that the belt strap (1) is formed in a strip-like manner, the cover element (11) being able to absorb the operating load exerted by the user during normal operation of the vehicle; and is

In a second operating state, the inflation part (12) is inflated in an explosion-blown manner, the cover part (11) uncovers the envelope (13) and the inflation part (12), which are deployed in the transverse direction of the belt webbing on one or both sides of the belt webbing, the deployed envelope (13) alone or together with the deployed inflation part (12) or the remaining cover part (11) or together with the deployed inflation part (12) and the remaining cover part (11) provides an envelope for the user, the deployed envelope (13) alone or together with the deployed inflation part (12) or the remaining cover part (11) or together with the deployed inflation part (12) and the remaining cover part (11) being able to withstand the operating load exerted by the user;

wherein the harness (1) comprises a load carrying cord (14) attached to the envelope or inflatable part, the load carrying cord (14) together with the envelope (13) carrying most or all of the work load applied by the user in the second work condition.

2. The seatbelt webbing of claim 1, wherein the seatbelt webbing is for a seat belt system of a motor vehicle.

3. The seatbelt webbing of claim 1 or 2,

the inflation component (12) and the enveloping part (13) are independent components, and in a second working state, the expansion of the inflation component (12) drives the expansion of the enveloping part (13); or

The inflation part (12) and the enveloping part (13) are integral parts with each other.

4. The belt strip according to claim 1 or 2, characterized in that the enveloping element (13) is a net or a planar element or a combination of a net and a planar element.

5. The seatbelt webbing of claim 4, wherein the mesh of the webbing is triangular, quadrilateral, pentagonal or hexagonal.

6. The seatbelt strap according to claim 4, characterized in that the enveloping element (13) is made of an elastic material, so that the enveloping element (13) which is deployed in the second operating state has a damping function.

7. The seatbelt webbing of claim 1 or 2,

said inflatable element (12) comprising at least one first element (12a) extending longitudinally and at least one second element (12b) extending angularly to the first element, said at least one first element (12a) being in internal communication with said at least one second element (12 b);

the envelope being connected at its outer edges to respective ends of a second part (12b) of the inflatable part (12);

in a second operating state, the inflation part (12) is inflated in an explosion-proof manner, so that the inflation part (12) is deployed in the transverse direction of the belt webbing on one or both sides of the belt webbing and thus brings about the deployment of the enveloping part.

8. The belt webbing of claim 7, characterized in that the inflation component (12) comprises exactly one first component (12a) extending centrally in the longitudinal direction of the belt webbing and at least one second component (12b) on each side of the first component.

9. The belt strip according to claim 7, characterized in that the enveloping element is exactly one layer in number or exactly two layers and encloses the inflatable element (12).

10. The seatbelt webbing of claim 7, wherein the second component (12b) forms an angle of 10 ° to 170 ° with the first component (12 a).

11. The seatbelt webbing of claim 7, wherein the second component (12b) forms an angle of 30 ° to 150 ° with the first component (12 a).

12. The seatbelt webbing of claim 7, wherein the second component (12b) forms an angle of 60 ° to 120 ° with the first component (12 a).

13. The seatbelt webbing according to claim 7, characterized in that the second part (12b) forms an angle of 80 ° to 100 ° with the first part (12 a).

14. The belt webbing of claim 1 or 2, characterized in that the load carrier line is made of an elastic material, so that the load carrier line has a damping function in the second operating state.

15. The belt strap of claim 1 or 2, characterized in that the load carrier cord (14) is formed by or arranged along the outer edge of the envelope.

16. The belt strap of claim 1 or 2, characterized in that the load carrying cord (14) is a nylon cord or a flexible cord consisting of a flexible wire core and a flexible jacket.

17. The belt strap of claim 1 or 2, characterized in that the carrier cable (14) comprises a cavity which can be filled explosively.

18. The seatbelt webbing of claim 17, wherein the cavity constitutes the inflation component or constitutes a part of the inflation component.

19. The seatbelt webbing of claim 17, wherein a flexible wire core is disposed in the cavity.

20. The belt strap according to claim 1 or 2, characterized in that the belt strap (1) is held in the belt shape in the first operating state by a seam which can be broken by an explosion-like inflation of the inflation part (12) in the second operating state.

21. The seatbelt webbing of claim 1 or 2,

the envelope (13) has a spindle-shaped contour in the deployed state, wherein the width of the envelope in the longitudinal direction of the belt strap increases first from one end of the envelope to the other end and then decreases, or the envelope in the deployed state has an oval contour or a rounded quadrilateral contour; and/or

The maximum width of the enveloping part (13) in the extended state is at least 2 times the width of the belt webbing in the first operating state.

22. The belt strap according to claim 1 or 2, characterized in that the maximum width of the enveloping element (13) in the deployed state is less than 10 times the width of the belt strap in the first operating state.

23. A seat belt system for a vehicle, comprising a gas generator (2) which can be ignited, characterized in that the seat belt system comprises a belt strap (1) according to any one of claims 1 to 22, an inflation part (12) of the belt strap (1) being connected to the gas generator (2).

24. The seat belt system of claim 23,

the seat belt system comprises a height and/or angle adjustment device (4) for adjusting the height position and/or the angle position of a guide (3) over which the belt webbing is guided.

25. Seat belt system according to claim 24, characterized in that the height and/or angle adjustment means comprise a guide rail (4a) and comprise a gimbal mechanism (4b) or a ball joint mechanism, which gimbal mechanism (4b) or ball joint mechanism is connected on one side with the guide rail (4a), is movable between the two ends of the guide rail and is biased by a spring towards one end of the guide rail; and is connected to the guide (3) on the other side.

26. The seat belt system of claim 25, wherein the rail has a stroke length of 60-80 mm.

27. Seat belt system according to claim 24, characterized in that the seat belt system is intended for a motor vehicle, the envelope (13) being a net made of an elastic material, the outer edge of which constitutes or is provided with an elastic carrying rope, which net in the second operating state alone provides an envelope surface for the user, which envelope surface envelopes the shoulders, chest and abdomen of the user, the inflation part (12) and the envelope (13) being separate parts from each other;

in the mounted state of the seatbelt strap (1) in the motor vehicle, the seatbelt strap is connected above via the gas generator (2) to the guide (3) and can be engaged and disengaged again below with a catch (6) provided in the motor vehicle, the guide (3) is in turn connected to the body of the motor vehicle via a height and/or angle adjustment device (4), and the guide (3) is formed by or fixedly connected to the housing of the gas generator; and is

The height and/or angle adjustment device (4) comprises a guide rail (4a) and comprises a gimbal mechanism (4b) or a ball joint mechanism, the gimbal mechanism (4b) or the ball joint mechanism being connected to the guide rail (4a) on one side, being movable between two ends of the guide rail and being biased towards one end of the guide rail by a resilient member; and the other side of the guide rail is connected with the guide piece (3), and the guide rail has a stroke length of 60-80 mm.