Airbag device, vehicle seat, and vehicle

Abstract

The present disclosure relates to an airbag device, a vehicle seat and a vehicle. The airbag device includes a head airbag portion, a chest airbag portion, an airbag tightening belt and an airbag tightener. The head airbag portion covers at least the side area of ​​the head of the occupant after deployment and has an asymmetric structure with respect to the central axis of the seat, so that the length of the short side portion of the head airbag portion is shorter than the length of the long side portion of the head airbag portion, so that a space for arranging a second airbag device is reserved in the short side portion of the head airbag portion. One end of the chest airbag portion is connected to the short side portion of the head airbag portion, and the other end of the chest airbag portion is connected to the airbag tightening belt via the airbag tightening belt. The chest airbag portion is configured to drive the airbag tightening belt to pass over the head of the occupant and reach the chest of the occupant during deployment, and the airbag tightening belt is configured to pull the chest airbag portion to the chest of the occupant by tightening the airbag tightening belt.

Description

Technical Field

[0001] The present disclosure generally relates to vehicle safety systems and more particularly to an airbag device, and a vehicle seat and a vehicle including the airbag device. Background Art

[0002] At present, in the field of vehicle safety, vehicle airbags are generally arranged on the steering wheel (such as airbags for the driver) and the instrument panel (such as airbags for other passengers) to protect the safety of passengers (which may include the driver and other passengers) during a frontal collision of the vehicle. In the case of a side collision, the prior art uses side air curtains installed on the side of the vehicle body and side airbags installed on the side of the seat close to the vehicle door to reduce the damage caused by the side collision to the passengers.

[0003] However, the above-mentioned existing vehicle safety technologies and products are only designed to provide protection when the occupant sits in an upright position on the seat or when the occupant sits in the designed position of the seat. However, in actual application, during the driving process of the vehicle, if a frontal collision occurs when the seat back is folded down and the occupant is half-lying or completely lying on the seat, since the occupant is half-lying or completely lying on the seat and the occupant's body is thus far away from the deployment area of ​​the traditional airbag, these airbags of the prior art, whether traditional front airbags or side air curtains, cannot provide effective protection to the occupant.

[0004] At the same time, with the development of vehicle intelligence, automatic driving or unmanned driving technology, the driver and other passengers in the car will be partially or completely freed from paying attention to the driving process. Therefore, the driver and other passengers in the car (especially the passengers on the co-pilot side) will have more possible sitting postures. These sitting postures can be summarized into three types of sitting postures, for example: 1) normal sitting posture, 2) working sitting posture, and 3) leisure sitting posture. Specifically, the normal sitting posture refers to the sitting posture when the occupant is fully focused on the driving process of the vehicle. Here, the seat back is generally adjusted to the design position of the seat, such as tilting back at most 25 degrees; the working sitting posture refers to the sitting posture when the occupant is not concerned about the driving process of the vehicle. The occupant can work or entertain in the vehicle. Here, the seat back can be adjusted to tilt back at most 45 degrees; and the leisure sitting posture refers to the sitting posture when the occupant is completely not concerned about the driving process of the vehicle. The occupant can close his eyes and rest. Here, the seat back can be adjusted to tilt back 60 degrees or even more. However, due to the above reasons, once a collision is unavoidable, the existing technology or traditional vehicle safety system is difficult to protect the occupants in the working and leisure sitting positions, and may even cause more serious injuries to the occupants, because the existing collision safety technical solutions are only for the situation where the occupants are in a normal sitting position or according to the design position of the seat to carry out collision safety injury evaluation and development. Therefore, there is an urgent need for a solution that can reliably provide collision protection for the occupants in the working and leisure sitting positions. Summary of the invention

[0005] One of the purposes of the present disclosure is to provide an airbag device for installation on a seat of a vehicle, which can at least provide collision protection for an occupant regardless of the use position of the seat, and in particular, can reliably provide collision protection in the occupant's working and leisure sitting positions. Within the scope of the present disclosure, the use position of the seat includes but is not limited to the position of the seat back at different tilt angles, and the front and rear positions of the seat in the longitudinal direction of the vehicle. Within the scope of the present disclosure, the term "occupant" may include the driver and other occupants except the driver.

[0006] In a first aspect of the present disclosure, an airbag device is provided. The airbag device is used to be installed on a seat of a vehicle. The airbag device includes a head airbag portion, a chest airbag portion, an airbag tightening belt and an airbag tightener; wherein, the head airbag portion at least covers the side area of ​​the occupant's head after being deployed, and the head airbag portion has an asymmetric structure with respect to the center axis of the seat, so that the length of the short side portion of the head airbag portion is shorter than the length of the long side portion of the head airbag portion, so as to reserve space for arranging a second airbag device on the short side portion of the head airbag portion, wherein the short side portion of the head airbag portion is close to the vehicle seat of the vehicle. The chest airbag portion is arranged on one side of a door of the vehicle, and the long side portion of the head airbag portion is the side away from the door of the vehicle; and wherein one end of the chest airbag portion is connected to the short side portion of the head airbag portion, and the other end of the chest airbag portion is connected to an airbag tightening device via an airbag tightening belt, wherein the chest airbag portion is configured to drive the airbag tightening belt over the head of the occupant and reach the chest of the occupant during deployment, and the airbag tightening device is configured to pull the chest airbag portion to the chest of the occupant by tightening the airbag tightening belt to at least protect the chest area of ​​the occupant.

[0007] According to one embodiment of the present disclosure, the head airbag portion, after being deployed, covers at least the lateral projection areas of the heads of 5% female dummies, 50% male dummies, and 95% male dummies sitting on the seat.

[0008] According to one embodiment of the present disclosure, the head airbag portion is arranged around the upper edge and left and right edges of the seat back, so that the head airbag portion can surround the occupant's head from the left and right sides and from above after being deployed.

[0009] According to one embodiment of the present disclosure, the long side portion of the head airbag portion extends from the top of the seat backrest to the bottom of the seat backrest. The length of the long side portion of the head airbag portion can be appropriately shortened according to the actual layout of the vehicle interior, such as to avoid the central channel, seat armrests, etc.

[0010] According to one embodiment of the present disclosure, when the chest airbag portion is held in front of the chest of the occupant by the airbag tightener, the chest airbag portion extends from the short side portion of the head airbag portion toward the long side portion of the head airbag portion at least across the seat center axis.

[0011] According to one embodiment of the present disclosure, the airbag retractor is disposed on a side of the seat away from a door of the vehicle.

[0012] According to one embodiment of the present disclosure, the airbag retractor is disposed at a bottom of a seat back and near a recliner of the seat.

[0013] According to one embodiment of the present disclosure, when the airbag device is not in use, the chest airbag portion and the head airbag portion are rolled up or folded in the longitudinal direction to form an elongated cylindrical compressed airbag, and the airbag tightening belt is folded in the cylindrical compressed airbag and arranged at the edge of the seat back, so that the chest airbag portion can drive the airbag tightening belt over the occupant's head and reach the occupant's chest during the deployment process.

[0014] According to one embodiment of the present disclosure, the free length of the airbag tightening strap is greater than the distance from the position point of the chest airbag portion in the cylindrical compression airbag to the position point of the airbag tightener, so that when the chest airbag portion is deployed, the airbag tightening strap has sufficient free length to bypass the occupant's head and reach the occupant's chest.

[0015] According to one embodiment of the present disclosure, the cylindrical compression airbag is arranged in the seat along the backrest edge of the seat, so that when deployed, the head airbag portion and the chest airbag portion are deployed around the occupant from behind the occupant to the front.

[0016] According to an embodiment of the present disclosure, the head airbag portion and / or the chest airbag portion are formed by cutting and sewing fabrics or by weaving through an integrated weaving technology.

[0017] According to an embodiment of the present disclosure, when the chest airbag portion is deployed, a fabric area of ​​the chest airbag portion facing the occupant is smaller than a fabric area of ​​the chest airbag portion facing away from the occupant.

[0018] According to an embodiment of the present disclosure, the head airbag portion and the chest airbag portion are connected to each other via a connecting portion, and the connecting portion is configured to enable the chest airbag portion to pivot relative to the head airbag portion.

[0019] According to one embodiment of the present disclosure, when deployed, the fabric area of ​​the connecting portion facing the passenger side is smaller than the fabric area of ​​the connecting portion facing away from the passenger side.

[0020] According to an embodiment of the present disclosure, the airbag tightening belt and the chest airbag portion are connected to each other via a single-point fixing structure or a multi-point fixing structure.

[0021] According to an embodiment of the present disclosure, the airbag tightening belt and the chest airbag portion are connected to each other via a Y-shaped fixing structure, or are connected to each other via an intermediate connecting piece.

[0022] According to one embodiment of the present disclosure, the airbag tightener is configured to retract the airbag tightening belt to a predetermined length, and the airbag tightener is configured to be hydraulically, pneumatically, electrically, magnetically and / or mechanically actuable.

[0023] According to one embodiment of the present disclosure, the head airbag portion and the chest airbag portion respectively include gas chambers, the gas chambers of the head airbag portion and the chest airbag portion are fluidly connected to each other, and the airbag device has at least one gas generator for inflating the head airbag portion and the chest airbag portion to enable them to deploy.

[0024] According to one embodiment of the present disclosure, the head airbag portion and the chest airbag portion respectively include gas chambers, the gas chambers of the head airbag portion and the chest airbag portion are independent of each other and not fluidically connected, and the airbag device has at least two gas generators for respectively inflating the head airbag portion and the chest airbag portion to make them deploy.

[0025] According to one embodiment of the present disclosure, the airbag device has a controller configured to trigger the gas generator and subsequently trigger the airbag retractor.

[0026] According to one embodiment of the present disclosure, the airbag device includes at least two gas chambers, and the at least two gas chambers are configured to be fluidly connected to each other or not fluidly connected to each other, wherein at least one of the at least two gas chambers includes a portion of the gas chamber of the head airbag portion and a portion of the gas chamber of the chest airbag portion.

[0027] According to one embodiment of the present disclosure, the head airbag portion and / or the chest airbag portion of the airbag installation device includes at least two gas chambers, and the at least two gas chambers are configured to be fluidly connected to each other or not fluidly connected to each other.

[0028] According to one embodiment of the present disclosure, an upper edge of the chest airbag portion comprises a convex contour.

[0029] According to one embodiment of the present disclosure, the contour of the protrusion is semicircular or semi-oval.

[0030] According to an embodiment of the present disclosure, the upper edge of the chest airbag portion includes a profile with convexities on both sides and a concave middle portion.

[0031] According to an embodiment of the present disclosure, the airbag device is configured to still provide protection for the head and chest of the occupant when the tilt angle of the seat is greater than or equal to 25 degrees.

[0032] According to one embodiment of the present disclosure, the head airbag portion includes a gas chamber, and the gas chamber is continuously connected at least in the direction of the top of the head.

[0033] In a second aspect of the present disclosure, an airbag device is provided. The airbag device is used to be installed on a seat of a vehicle. The airbag device includes a head airbag portion and a chest airbag portion, wherein the head airbag portion at least covers the side area of ​​the head of the occupant after being deployed, and the head airbag portion has an asymmetric structure with respect to the center axis of the seat, so that the length of the short side portion of the head airbag portion is shorter than the length of the long side portion of the head airbag portion, so that a space for arranging a second airbag device is reserved in the short side portion of the head airbag portion, wherein the short side portion of the head airbag portion is a side close to the door of the vehicle, and the long side portion of the head airbag portion is a side away from the door of the vehicle; and wherein one end of the chest airbag portion is connected to the short side portion of the head airbag portion, and the chest airbag portion is located in front of the chest of the occupant after being deployed to protect at least the chest area of ​​the occupant.

[0034] In a third aspect of the present disclosure, an airbag device is provided. The airbag device is used to be installed on a seat of a vehicle. The airbag device includes a head airbag portion, a chest airbag portion, an airbag tightening belt and an airbag tightener; wherein the head airbag portion at least covers the side area of ​​the head of the occupant after deployment and has a first side and a second side, wherein the first side of the head airbag portion is a side close to the door of the vehicle, and the second side of the head airbag portion is a side away from the door of the vehicle; and wherein one end of the chest airbag portion is connected to the first side of the head airbag portion, and the other end of the chest airbag portion is connected to the airbag tightener via the airbag tightening belt, wherein the chest airbag portion is configured to drive the airbag tightening belt over the head of the occupant and reach the chest of the occupant during deployment, and the airbag tightener is configured to pull the chest airbag portion to the chest of the occupant by tightening the airbag tightening belt to at least protect the chest area of ​​the occupant.

[0035] In a fourth aspect of the present disclosure, a vehicle seat is provided, wherein the vehicle seat comprises at least one airbag device according to the present disclosure.

[0036] According to one embodiment of the present disclosure, the vehicle seat further has a second airbag device which is a separate side airbag provided on a side of the vehicle seat close to a door of the vehicle.

[0037] In a fifth aspect of the present disclosure, a vehicle is provided, wherein the vehicle has a vehicle seat according to the present disclosure.

[0038] According to one embodiment of the present disclosure, the vehicle includes an airbag control unit, which is configured to be signal-connected to at least the airbag device in the vehicle seat, so that the airbag control unit can at least control the triggering of the gas generator of the airbag device and / or the airbag retractor.

[0039] It should be noted that the various aspects of the present disclosure described for one embodiment may be included in other different embodiments, although not specifically described for the other different embodiments. In other words, all embodiments and / or features of any embodiment may be combined in any manner and / or combination, as long as they are not mutually contradictory. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Aspects of the present disclosure will be better understood after reading the following detailed description in conjunction with the accompanying drawings, in which:

[0041] Figure 1 is a schematic diagram of an airbag device according to an embodiment of the present disclosure when it is installed on a seat of a vehicle;

[0042] Figure 2 yes Figure 1 A schematic perspective view of the airbag device shown after deployment;

[0043] Figure 3 yes Figure 1 A schematic diagram of a head airbag portion and a chest airbag portion of the safety airbag device before folding;

[0044] Figure 4 is a schematic diagram of an airbag retractor of an airbag device according to an embodiment of the present disclosure before being triggered;

[0045] Figure 5 yes Figure 4 A schematic diagram of the air bag retractor shown after being triggered;

[0046] Figure 6 is a schematic diagram of different fixing structures of a chest airbag portion and an airbag tightening belt of a safety airbag device according to the present disclosure;

[0047] Figure 7 and Figure 8 is a schematic diagram of a head airbag portion and a chest airbag portion of an airbag device according to another embodiment of the present disclosure before folding;

[0048] Fig. 9 is a schematic diagram of a head airbag portion and a chest airbag portion of an airbag device according to yet another embodiment of the present disclosure before folding;

[0049] Fig.10 is based on Fig. 9 A schematic perspective view of an airbag device after deployment;

[0050] Fig.11 is a schematic diagram of a head airbag portion and a chest airbag portion of an airbag device according to another embodiment of the present disclosure before folding;

[0051] Fig.12 yes Figure 3 A schematic diagram of the connection between the middle head airbag part and the chest airbag part after being cut along the cutting line AA;

[0052] Fig.13 is a schematic diagram of an airbag device according to another embodiment of the present disclosure installed on a seat of a vehicle. DETAILED DESCRIPTION

[0053] The present disclosure will be described below with reference to the accompanying drawings, wherein the accompanying drawings illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in a variety of different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0054] It should be understood that the terms used in the specification are only used to describe specific embodiments and are not intended to limit the present disclosure. All terms (including technical terms and scientific terms) used in the specification have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of simplicity and / or clarity, well-known functions or structures may not be described in detail.

[0055] The singular forms "a", "said" and "the" used in the specification include plural forms unless clearly indicated. The terms "include", "comprise" and "contain" used in the specification indicate the presence of the claimed features, but do not exclude the presence of one or more other features. The term "and / or" used in the specification includes any and all combinations of one or more of the relevant listed items.

[0056] In the specification, when an element is referred to as being “on,” “attached to,” “connected to,” “coupled to,” or “contacting” another element, etc., the element may be directly on, attached to, connected to, coupled to, or contacting another element, or intervening elements may be present.

[0057] In the specification, the terms "first", "second", "third", etc. are only used for convenience of description and are not intended to be limiting. Any technical features represented by "first", "second", "third", etc. are interchangeable.

[0058] In the specification, spatial relational terms such as "upper", "lower", "front", "back", "top", "bottom", etc. may describe the relationship of one feature to another feature in the drawings. It should be understood that the spatial relational terms include different orientations of the device in use or operation in addition to the orientation shown in the drawings. For example, when the device in the drawings is turned over, features previously described as being "below" other features may now be described as being "above" the other features. The device may also be otherwise oriented (rotated 90 degrees or in other orientations), and the relative spatial relationships will be interpreted accordingly.

[0059] The present disclosure relates to an airbag device. The airbag device of the present disclosure is used to be installed on a seat of a vehicle. The airbag of the present disclosure can at least reliably provide collision protection for an occupant regardless of the use position of the seat. In particular, the airbag device of the present disclosure is configured to still provide protection for the head and chest of an occupant when the tilt angle of the seat is greater than or equal to 25 degrees.

[0060] Figures 1 to 3 An airbag device 1 according to an embodiment of the present disclosure is shown. The airbag device 1 may be installed on a seat 2 of a vehicle. The airbag device 1 may include a head airbag portion 1.1 and a chest airbag portion 1.2. The airbag device 1 may also include at least one gas generator for inflating the head airbag portion 1.1 and the chest airbag portion 1.2 to deploy them, such as Figure 1 The two gas generators 1.3 and 1.4 are shown. The head airbag portion 1.1 is configured to cover at least the side area of ​​the head of the occupant 3 after deployment. In one embodiment according to the present disclosure, the head airbag portion 1.1 can be configured to have an asymmetric structure with respect to the center axis L of the seat 2, so that the length of the short side portion 1.11 of the head airbag portion 1.1 is shorter than the length of the long side portion 1.12 of the head airbag portion 1.1, so as to reserve space for arranging a second safety airbag device in the short side portion 1.11 of the head airbag portion 1.1.

[0061] See also Figure 1 , schematically shows an airbag device 1 installed on a seat 2. The seat 2 may be a driver's seat and / or other passenger seats in a vehicle. For the sake of clarity, only the seat frame 2.1 of the seat 2 is shown without showing the seat foam and covering fabric. Figure 1 The right side of the seat in the embodiment may be the side close to the door of the vehicle, and Figure 1The left side of the seat in the figure can be a side away from the door of the vehicle. Figure 1 The extension direction of the head airbag portion 1.1 on the seat 2 is schematically shown by the dotted line 1'. It can be seen that the head airbag portion 1.1 has an asymmetric structure with respect to the center axis L of the seat 2. The extension length of the short side portion 1.11 of the head airbag portion 1.1 (i.e., the side close to the vehicle door) is shorter than the extension length of the long side portion 1.12 of the head airbag portion 1.1 (i.e., the side away from the vehicle door), so as to reserve space for setting a second airbag device, especially a separate side airbag, on the side of the head airbag portion 1.1 close to the vehicle door. The extension length of the long side portion of the head airbag can be appropriately shortened according to the actual layout of the vehicle interior, for example, to avoid the central channel, seat armrests, etc. This asymmetric structure of the head airbag portion 1.1 is advantageous in the event of a side collision, which will be referred to below. Figure 2 and Figure 3 This is described in more detail in conjunction with the chest airbag section 1.2.

[0062] In one embodiment according to the present disclosure, the head airbag portion 1.1 may be arranged around the upper edge and the left and right edges of the seat 2, so that the head airbag portion 1.1 can surround the head of the occupant 3 from the left and right sides and the top after deployment and at least cover the side area of ​​the head of the occupant 3. One end of the chest airbag portion 1.2 may be connected to the short side portion 1.11 of the head airbag portion 1.1, and the chest airbag portion 1.2 may be configured to cover and protect at least the chest of the occupant 3, or even the chest and head and neck area of ​​the occupant 3, in front of the occupant 3 after deployment. In some cases, especially in a frontal collision, after the airbag device 1 is deployed, the chest airbag portion 1.2 thereof may be configured to cover and protect the entire area above the waist of the occupant 3 in front of the occupant 3 after deployment, thereby providing more comprehensive protection for the occupant 3. Since the airbag device 1 is integrally mounted on the seat 2, the adjustment of the use position of the seat 2 (e.g., the tilt angle of the backrest 2.2 of the seat 2 and the front-rear position of the seat 2 in the longitudinal direction of the vehicle) does not change the relative position relationship between the airbag device 1 and the occupant 3 sitting on the seat 2, which enables the airbag device 1 to always participate in restraining the occupant 3 during a collision. Therefore, the restraint and protection functions of the airbag device 1 according to the present disclosure are basically not affected by the use position of the seat 2, and can provide collision protection for the occupant 3 in basically any use position of the seat 2. In this way, the airbag device 1 according to the present disclosure can not only well protect the occupant 3 in a normal sitting position of the occupant 3 (when the seat back 2.2 is tilted backward by less than about 25 degrees) during a frontal collision and a side collision, but also well protect the occupant 3 in a working sitting position of the occupant 3 (when the seat back 2.2 can be tilted backward by an angle between 25 degrees and 45 degrees) and a leisure sitting position (when the seat back 2.2 can be tilted backward by an angle between 45 degrees and 60 degrees or even greater than 60 degrees), or when the head of the occupant 3 is away from the front airbag and the side air curtain of the vehicle. Therefore, the airbag device 1 according to the present disclosure can be used in vehicles with any level of autonomous driving.

[0063] In one embodiment according to the present disclosure, the long side portion 1.12 of the head airbag portion 1.1 may extend from the top of the backrest 2.2 of the seat 2 (or the top of the headrest 2.3) to the bottom of the backrest 2.2 of the seat 2, and the short side portion 1.11 of the head airbag portion 1.1 may extend from the top of the backrest 2.2 of the seat 2 (or the top of the headrest 2.3) to a position near the shoulder of the occupant 3. Figure 1 and Figure 2 On the side of the seat 2 close to the vehicle door, a space 6 for arranging a separate side airbag (not shown) is reserved below the short side portion 1.11 of the head airbag portion 1.1. Figure 2 As shown on the left side, the occupant 3 tends to move toward the collision side (i.e., outside the vehicle), and the short side portion 1.11 and the long side portion 1.12 of the head airbag portion 1.1 can wrap the head of the occupant 3 from both sides of the seat, and the short side portion 1.11 of the head airbag portion 1.1 together with the chest airbag portion 1.2 can surround the head of the occupant 3 from the side close to the vehicle door, and the chest airbag portion 1.2 covers the chest and even the head and neck of the occupant 3 from near the shoulder of the occupant 3. At the same time, the side airbag arranged on the side close to the vehicle door can lift the arm of the occupant 3 on the side close to the vehicle door and protect the occupant 3 from the side close to the vehicle door when deployed. Furthermore, in the event of a far side collision (i.e., a collision occurs at the Figure 2 As shown on the right side, the occupant 3 tends to move toward the collision side (i.e., the direction inside the vehicle). After the head airbag portion of the airbag device is deployed, the long side portion 1.12 of the head airbag portion (i.e., the head airbag portion in the direction inside the vehicle) will support and restrain the movement of the occupant's head, neck and chest in the collision direction, thereby playing the protective role of the distal airbag. Therefore, by configuring the head airbag portion 1.1 of the airbag device 1 of the present disclosure into an asymmetric structure, the airbag device 1 according to the present disclosure can be arranged around the seat 2 of the vehicle in combination with a separate side airbag, thereby providing more reliable and more comprehensive protection for the occupant 3. For example, when the side airbag is deployed, the arm of the occupant 3 on one side close to the door of the vehicle can be lifted, thereby preventing the vehicle's airbag system from wrapping both arms of the occupant 3 in the airbag when deployed, and causing the arms to squeeze the ribs of the occupant 3 inward from both sides due to the large impact force of the airbag when deployed and the impact force during a side collision, thereby causing additional injury risks. Thus, the airbag device 1 according to the present disclosure can provide protection to the occupant 3 regardless of the use position of the seat 2 while avoiding additional damage to the occupant 3 as much as possible. In one embodiment according to the present disclosure, the separate side airbag can be any suitable type of existing or newly developed side airbag.

[0064] In order to provide the widest possible applicability, the head airbag portion 1.1 can be constructed to cover at least the lateral projection area of ​​the heads of 5% of female dummies, 50% of male dummies, and 95% of male dummies sitting on the seat 2 after deployment, so as to provide reliable collision protection for more than 90% of occupants of different body shapes and weights.

[0065] In one embodiment according to the present disclosure, Figure 2 As shown, the free end of the chest airbag portion 1.2 can be connected to the airbag tightening device 1.6 via the airbag tightening belt 1.5. Figure 1As shown, the airbag retractor 1.6 can be arranged at the bottom of the backrest of the seat 2 on the side of the seat 2 away from the vehicle door. Specifically, the airbag retractor 1.6 can be arranged behind the backrest 2.2 of the seat 2 near the recliner of the backrest 2.2 of the seat 2. In this way, when or after being deployed, the chest airbag portion 1.2 can be pulled by the airbag retractor 1.6 via the airbag retractor belt 1.5 and move across the chest of the occupant to be kept in front of the chest of the occupant 3 or cross the area above the waist of the occupant 3 in front, so that the chest airbag portion 1.2 can function correctly and at least protect the chest of the occupant 3, or even the chest and head and neck area, or further at least partially protect the area above the waist of the occupant 3 when a collision occurs.

[0066] In order to enable the chest airbag portion 1.2 to drive the airbag tightening belt 1.5 to pass over the head of the occupant 3 and reach the chest of the occupant 3 during the deployment process, in one embodiment according to the present disclosure, when the airbag device 2 is not in use, the chest airbag portion 1.2 and the head airbag portion 1.1 can be rolled up or folded in the longitudinal direction as shown in FIG. Figure 1 The long cylindrical compressed airbag 1.7 is shown. The airbag tightening belt 1.5 is folded in the cylindrical compressed airbag 1.7 and extends from the position point of the chest airbag part 1.2 in the cylindrical compressed airbag 1.7 along the edge of the backrest 2.2 and the headrest 2.3 of the seat 2 (for example, along the direction schematically shown by the dotted line 1') to the airbag tightener 1.6. When the chest airbag part 1.2 and the head airbag part 1.1 are unfolded, the chest airbag part 1.2 and the head airbag part 1.1 break through the covering fabric of the seat 2 from the state of the folded or rolled cylindrical compressed airbag 1.7 as they unfold, and unfold around the occupant 3 from behind the occupant 3 to the front. At the same time, the chest airbag part 1.2 drives the connected airbag tightening belt 1.5 from above the head of the occupant 3 to the chest of the occupant 3 during the unfolding process. In order to enable the airbag tightening strap 1.5 to pass around the head of the occupant 3 smoothly and without hindrance during the deployment process, in one embodiment according to the present disclosure, the free length of the airbag tightening strap 1.5 may be greater than the distance from the position point of the chest airbag part 1.2 in the cylindrical compression airbag 1.7 to the position point of the airbag tightener 1.6, so that when the chest airbag part 1.2 is deployed, the airbag tightening strap 1.5 has sufficient free length to pass around the head of the occupant 3 and reach the chest of the occupant 3.

[0067] In order to pull the chest airbag part 1.2 and thus keep it in front of the chest of the occupant 3, during the deployment of the chest airbag part 1.2 or after the deployment of the chest airbag part 1.2, the airbag tightening device 1.6 can move the airbag tightening belt 1.5 along the Figure 2The predetermined length is recovered in the direction indicated by the middle arrow to tighten the chest airbag portion 1.2. In this way, during a collision, the head airbag portion 1.1, the chest airbag portion 1.2, the airbag tightening belt 1.5 and the airbag tightening device 1.6 jointly produce a restraining effect on the occupant 3. Due to the existence of the airbag tightening device 1.6, on the one hand, during the deployment of the chest airbag portion 1.2, the airbag tightening belt 1.5 can smoothly and unhinderedly bypass the head of the occupant 3 with a sufficient free length. On the other hand, after the airbag tightening belt 1.5 bypasses the head of the occupant 3, the airbag tightening belt 1.5 can be actively recovered by the airbag tightening device 1.6 to pull the chest airbag portion 1.2 and keep the chest airbag portion 1.2 more tightly in front of the chest of the occupant 3, thereby producing an additional restraining effect on the occupant 3. This is particularly helpful when the inclination angle of the seat 2 is greater than or equal to 25 degrees, or when the occupant 3 is in a working or leisure sitting position, because a large inclination angle of the seat 2 may weaken the restraint and protection effect of the vehicle's safety belt on the occupant 3, and these defects can be compensated by the restraint effect of the head airbag part 1.1, the chest airbag part 1.2, the airbag tightening belt 1.5 and the airbag tightening device 1.6 on the occupant 3 according to the present disclosure. Here, because the chest airbag part 1.2 can basically start from the shoulder of the occupant 3 on one side close to the vehicle door, cross in front of the occupant 3 and extend to the waist of the occupant 3 on the other side under the joint action of the airbag tightening belt 1.5 and the airbag tightening device 1.6, the airbag device 1 according to the present disclosure can also be used to replace or add to the safety belt to a certain extent. Even in the special application scenario where the occupant 3 is not wearing a safety belt, the airbag device 1 according to the present disclosure can also achieve a restraint effect on the occupant to a certain extent in the event of a collision. Furthermore, in some cases, the airbag device 1 according to the present disclosure can well protect and restrain the occupant 3 to a certain extent even during a severe collision or even a vehicle rollover.

[0068] In order to further optimize the deployment process of the chest airbag portion 1.2 and the airbag tightening belt 1.5, in one embodiment according to the present disclosure, the gas generators 1.3, 1.4 and the airbag tightening device 1.6 of the airbag device 1 can be controlled so that when a collision occurs, the gas generators 1.3, 1.4 are triggered first and the airbag tightening device 1.6 is triggered subsequently. Therefore, when the airbag device 1 is deployed, the chest airbag portion 1.2 is at least partially deployed first and then the airbag tightening belt is recovered and the chest airbag portion 1.2 is tightened by the airbag tightening device 1.6 to ensure the smooth progress of the deployment process.

[0069] Figure 4 and Figure 5An airbag retractor 1.6 in one embodiment according to the present disclosure is shown. The airbag retractor 1.6 may be configured such that after it is triggered, a pyrotechnic gas generator in the airbag retractor 1.6 is activated, thereby pushing a piston in a steel tube of the airbag retractor 1.6 outward. Figure 6 Move to the left position in Figure 7 The right side of the airbag tightening belt 1.5 is driven along Figure 5 In some other embodiments according to the present disclosure, the airbag tightener 1.6 may also be constructed as any type of airbag tightener that can be hydraulically, pneumatically, electrically, magnetically and / or mechanically actuated, as long as the airbag tightener can retract the airbag tightening belt 1.5 according to a predetermined length.

[0070] In one embodiment according to the present disclosure, when the chest airbag portion 1.2 is held in front of the chest of the occupant 3 by the airbag tightening belt 1.5 and the airbag tightener 1.6, the chest airbag portion 1.2 can extend from the short side portion 1.11 of the head airbag portion 1.1 toward the long side portion 1.12 of the head airbag portion 1.2 at least across the seat center axis L. As a result, the chest airbag portion 1.2 can cover at least the chest, or the chest and head and neck area, or the entire area above the waist of the occupant to a greater extent, thereby providing a large protection area.

[0071] In one embodiment according to the present disclosure, the airbag tightening belt 1.5 and the chest airbag part 1.2 can be fixed by a single point structure ( Figure 6 In some other embodiments of the present disclosure, the airbag tightening belt 1.5 and the chest airbag portion 1.2 can also be connected by a multi-point fixing structure, such as a Y-shaped fixing structure ( Figure 6 Figure b), trident fixed structure ( Figure 6 In some other embodiments of the present disclosure, the airbag tightening belt 1.5 and the chest airbag part 1.2 can also be connected by an intermediate connecting member ( Figure 6 Thus, the tension of the airbag tightening belt 1.5 can be more evenly distributed on the free end of the chest airbag part 1.2 to reduce the deformation of the chest airbag part 1.2 when tightened. The intermediate connector can be a planar connector or a three-dimensional connector of any structure.

[0072] Figure 3 , Figures 7 to 9 as well as Fig.11 Schematic diagrams of the head airbag portion 1.1 and the chest airbag portion 1.2 of the airbag device 1 according to different embodiments of the present disclosure before folding are respectively shown. Figure 3 , Figure 7 as well as Figure 8The head airbag part 1.1 and the chest airbag part 1.2 shown in the figure can basically form the following after being deployed: Figure 2 Shown in expanded state.

[0073] In one embodiment according to the present disclosure, the chest airbag portion 1.2 may be configured to have a substantially elongated or rectangular shape in a flattened state. Figure 3 As shown exemplarily, in the flattened state, the chest airbag portion 1.2 can extend obliquely from the short side portion 1.11 of the head airbag portion 1.1 in a direction away from the seat center axis L. In another embodiment according to the present disclosure, as Figure 7 As shown exemplarily, in the flattened state, the chest airbag portion 1.2 may also extend from the short side portion 1.11 of the head airbag portion 1.1 substantially parallel to the seat center axis L. In another embodiment according to the present disclosure, Figure 8 As shown by way of example, in the flattened state, the chest airbag portion 1.2 can also extend from the short side portion 1.11 of the head airbag portion 1.1 via the transition of the connecting portion 1.8 between the head airbag portion 1.1 and the chest airbag portion 1.2 in the direction of the seat center axis L, or in other words, across the seat center axis L to the long side portion 1.12 of the head airbag portion 1.1. With such a geometric structure, the chest airbag portion 1.2 can naturally extend in the direction of the long side portion 1.12 of the head airbag portion 1.1 after being deployed, thereby facilitating the chest airbag portion 1.2 to correctly and quickly reach its protective position for the occupant 3 after being deployed. In addition, the geometric structure of the chest airbag portion 1.2 being substantially parallel to the head airbag portion 1.1 in the flattened state enables the chest airbag portion 1.2 and the head airbag portion 1.1 to be more conveniently rolled up or folded together into a shape such as a folded chest airbag portion 1.2. Figure 1 The elongated cylindrical compression airbag 1.7 is shown.

[0074] It should be noted that the head airbag portion 1.1 and / or the chest airbag portion 1.2 can be designed into different structural forms as needed without departing from the scope of the present disclosure. For example, in one embodiment according to the present disclosure, Fig. 9 and Fig.10 As shown exemplarily, in tiling ( Fig. 9 ) or expand ( Fig.10 ), the edge of the upper portion 1.22 of the chest airbag portion 1.2 may include a convex contour (e.g., a semicircular or semi-oval convex contour). The lower portion 1.21 of the chest airbag portion 1.2 may be configured to be substantially straight and have almost no curvature. Fig.10The dotted line schematically shows the direction of the upper part 1.22 of the chest airbag part 1.2 when the chest airbag part 1.2 is held in front of the chest of the occupant by the airbag tightener 1.6. Here, the upper part 1.22 of the chest airbag part 1.2 can be understood as the upward longitudinal side of the chest airbag part 1.2 in the deployed state, and correspondingly, the lower part 1.21 of the chest airbag part 1.2 can be understood as the downward longitudinal side of the chest airbag part 1.2 in the deployed state. It can be seen that such a geometric shape of the chest airbag part 1.2 helps to better cover and protect the chest, or the chest and head and neck area of ​​the occupant 3. In another embodiment according to the present disclosure, the edge of the upper part 1.22 of the chest airbag part 1.2 may include a contour that is convex on both sides and concave in the middle, such as Fig.11 In the case where the chest airbag portion 1.2 is held in front of the chest of the occupant by the airbag tightener 1.6, such a geometric shape of the chest airbag portion 1.2 can restrict the movement of the head of the occupant 3 in the lateral direction to a certain extent.

[0075] The head airbag portion 1.1 and the chest airbag portion 1.2 can be formed by cutting and sewing fabrics or by weaving them through an integrated weaving technology. In order to provide more favorable collision protection for the occupant 3, when the chest airbag portion 1.2 is deployed, the fabric area of ​​the side of the chest airbag portion 1.2 facing the occupant 3 can be smaller than the fabric area of ​​the side away from the occupant 3. In this way, the chest airbag portion 1.2 can have a geometric shape that naturally bends toward the occupant 3 and surrounds the occupant 3 after deployment. In one embodiment according to the present disclosure, the fabric of the side of the chest airbag portion 1.2 facing the occupant 3 can be cut smaller than the fabric of the side away from the occupant 3, and when sewing, the fabric of the side of the chest airbag portion 1.2 away from the occupant 3 can be sewn in a way that it can be extended when deployed, so that the above-mentioned favorable geometric shape of the chest airbag portion 1.2 can be obtained. In another embodiment of the present disclosure, both sides of the chest airbag portion 1.2 can be cut to have substantially the same area, and during sewing, a portion of the fabric on the side of the chest airbag portion 1.2 facing the occupant 3 can be fixedly sewn together in an inextensible manner, thereby obtaining the above-mentioned advantageous geometric shape of the chest airbag portion 1.2. In yet another embodiment of the present disclosure, the chest airbag portion 1.2 can be woven by an integral weaving technology, wherein the chest airbag portion 1.2 is designed to have the above-mentioned advantageous geometric shape.

[0076] In some embodiments according to the present disclosure, the head airbag portion 1.1 and the chest airbag portion 1.2 are connected to each other via a connecting portion 1.8. Due to the flexible characteristics of the airbag fabric material, the connecting portion 1.8 is configured such that the chest airbag portion 1.2 can pivot relative to the head airbag portion 1.1 (see in particular Figure 3 , Figure 8 , Fig. 9 and Fig.11 ). In order to facilitate the pivoting of the chest airbag portion 1.2 relative to the head airbag portion 1.1, in one embodiment according to the present disclosure, as Figure 8 As shown, the connecting portion 1.8 can be configured to have a relatively narrow width, so that in the inflated or deployed state, a relatively small amount of gas can be filled in the connecting portion 1.8, so that the chest airbag portion 1.2 can be more easily pivoted relative to the head airbag portion 1.1 toward the occupant 3. In addition, in one embodiment according to the present disclosure, as Fig.12 As shown (which shows Figure 3 (a schematic diagram of the connection part 1.8 cut along the section line AA in FIG. 1 ), the area of ​​the fabric 1.81 of the connection part 1.8 between the head airbag part 1.1 and the chest airbag part 1.2 facing the occupant side can be smaller than the area of ​​the fabric 1.82 facing away from the occupant side. The fabric 1.81 of the connection part 1.8 facing the occupant side can be cut smaller than the fabric 1.82 facing away from the occupant side, and the fabric 1.82 of the connection part 1.8 facing away from the occupant side can be sewn in a pleated form, for example. When deployed, the pleats of the fabric 1.82 of the connection part 1.8 facing away from the occupant side can be extended, so that the chest airbag part 1.2 can naturally pivot relative to the head airbag part 1.1 toward the occupant 3 after deployment through such a geometric structure of the connection part 1.8, which further facilitates the chest airbag part 1.2 to correctly and quickly reach its protective position for the occupant 3 after deployment.

[0077] In one embodiment according to the present disclosure, the gas chambers of the head airbag portion 1.1 and the chest airbag portion 1.2 may be in fluid communication with each other, so that the airbag device 1 may have only one gas chamber. Figure 1 The two gas generators 1.3 and 1.4 shown disposed on the seat frame 2.1 of the seat 2 inflate the one gas chamber via two inflation interfaces 1.14 and 1.15 disposed on the head airbag portion 1.1, respectively, to allow the head airbag portion 1.1 and the chest airbag portion 1.2 to unfold. Of course, the inflation interfaces 1.14 and 1.15 may also both be disposed on the chest airbag portion 1.2, or may be disposed on the head airbag portion 1.1 and the chest airbag portion 1.2, respectively. In addition, the head airbag portion 1.1 and the chest airbag portion 1.2 may be connected to the seat frame 2.1 of the seat 2 via a plurality of connecting ears 1.13 disposed on the head airbag portion 1.1, for which reference may be made to FIG. Figure 3 , Figures 7 to 9 as well as Fig.11, wherein, for the sake of clarity, only one connecting ear piece is provided with a reference numeral. In some embodiments according to the present disclosure, the head airbag portion 1.1 and the chest airbag portion 1.2 may also be connected to the seat frame 2.1 by means of bonding or snap connection, clamping connection, anchoring connection, etc. In one embodiment according to the present disclosure, the gas chamber of the head airbag portion 1.1 is continuous at least in the direction of the top of the head, so that the head airbag portion is in the form of a head cover. Such a head airbag portion can better wrap the head of the occupant, and can provide better restraint protection for the occupant in accidents such as rear collision and vehicle rollover.

[0078] In one embodiment according to the present disclosure, the gas generators 1.3, 1.4 may be arranged laterally on the back side of the seat frame 2.1 of the seat 2, such as Figure 1 In another embodiment according to the present disclosure, as shown in Fig.13 As shown by way of example, the gas generators 1.3 and 1.4 can be arranged vertically on the back of the seat frame 2.1 of the seat 2, in particular, vertically on the side of the seat frame 2.1. Thus, on the one hand, the structural space requirement of the airbag device 1 as a whole can be reduced, and the impact of the airbag device 1 on other components of the seat 2 can be reduced. On the other hand, a certain amount of space can be left on the back of the backrest of the seat 2 or on the bottom of the backrest of the seat 2, and this space can be used, for example, for the passengers in the back row of the seat 2 to place their knees or legs when sitting, thereby providing a more comfortable riding experience for the passengers in the back row.

[0079] According to some embodiments of the present disclosure, the head airbag portion 1.1 and the chest airbag portion 1.2 may also be independent of each other and not fluidically connected, whereby the airbag device 1 may include at least two gas chambers, and at least two generators may be used to inflate the at least two gas chambers respectively to deploy the head airbag portion 1.1 and the chest airbag portion 1.2.

[0080] It should be noted that the gas chamber of the airbag device 1 is not mandatory to be divided according to the head airbag portion 1.1 and the chest airbag portion 1.2. In some embodiments of the present disclosure, the airbag device 1 may include at least two gas chambers, and the at least two gas chambers are configured to be fluidly connected to each other or not fluidly connected to each other, wherein at least one of the at least two gas chambers includes a portion of the gas chamber of the head airbag portion 1.1 and a portion of the gas chamber of the chest airbag portion 1.2. For example, in one embodiment of the present disclosure, the head airbag portion 1.1 can be divided into two gas chambers along the center axis L of the seat, wherein the long side portion 1.12 of the head airbag portion and the gas chamber of the chest airbag portion 1.2 are fluidly connected to each other and constitute the first chamber of the airbag device 1, and the short side portion 1.11 of the head airbag portion 1.1 constitutes the second chamber of the airbag device 1. In addition, in one embodiment of the present disclosure, the head airbag portion 1.1 may include only one gas chamber, while the chest airbag portion 1.2 may include two gas chambers, and the two gas chambers of the chest airbag portion 1.2 are respectively fluidly connected to the gas chamber 1.2 of the head airbag portion 1.1. In some other embodiments of the present disclosure, each head airbag portion 1.1 and chest airbag portion 1.2 may include two or more gas chambers, and the two or more gas chambers may be divided in any direction, and the two or more gas chambers may be fluidly connected to each other or not. In short, the number and configuration of the gas chambers of the airbag device 1 and the number and configuration of the gas generators 1.3 and 1.4 can be adjusted and adapted according to actual needs without departing from the scope of the present application.

[0081] In some embodiments according to the present disclosure, the airbag device 1 can be installed on at least one seat 2 of the vehicle, in particular, can be installed on all seats 2 of the vehicle. In some embodiments according to the present disclosure, the vehicle may include an airbag control unit. The airbag control unit may be configured to be at least connected to the airbag device signal in the seat of the vehicle, so that the airbag control unit can at least control the triggering of the gas generator and / or the airbag retractor of the airbag device. According to some embodiments of the present disclosure, when the vehicle includes a side airbag, the airbag control unit may also be configured to be connected to the side airbag signal, so that the airbag control unit can control the triggering of the gas generator of the side airbag.

[0082] The above describes exemplary embodiments according to the present disclosure with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure. All changes and modifications are included in the scope of protection of the present disclosure as defined by the claims. The present disclosure is defined by the appended claims, and the equivalents of these claims are also included.

Claims

1. An airbag device, the airbag device is used to be installed on a seat of a vehicle, characterized in that: The safety airbag device comprises a head airbag portion, a chest airbag portion, an airbag tightening belt and an airbag tightener; wherein the head airbag portion is arranged around the upper edge and left and right edges of the seat backrest, so that the head airbag portion can surround the head of the occupant from the left and right sides and the top and at least cover the side area of ​​the occupant's head after being deployed, and the head airbag portion has an asymmetric structure with respect to the center axis of the seat, the short side portion of the head airbag portion extends from the top of the seat backrest to the position near the shoulder of the occupant, and the long side portion of the head airbag portion extends from the top of the seat backrest to the bottom of the seat backrest, so that the extension length of the short side portion of the head airbag portion is shorter than the extension length of the long side portion of the head airbag portion, so as to reserve a space for arranging a second safety airbag device on the short side portion of the head airbag portion, wherein the short side portion of the head airbag portion is the side close to the door of the vehicle, and the long side portion of the head airbag portion is the side away from the door of the vehicle; and One end of the chest airbag portion is connected to the short side portion of the head airbag portion, and the other end of the chest airbag portion is connected to the airbag tightening device via an airbag tightening belt, and the airbag tightening device is arranged at the bottom of the seat backrest on the side of the seat away from the door of the vehicle and is located near the recliner of the seat, wherein the chest airbag portion is configured to drive the airbag tightening belt over the head of the occupant and reach the chest of the occupant during deployment, and the airbag tightening device is configured to pull the chest airbag portion to the chest of the occupant by tightening the airbag tightening belt to at least protect the chest area of ​​the occupant.

2. The airbag device according to claim 1, characterized in that: After being deployed, the head airbag portion at least covers the lateral projection areas of the heads of 5% female dummies, 50% male dummies, and 95% male dummies sitting on the seat.

3. The airbag device according to claim 1 or 2, characterized in that: When the chest airbag portion is held in front of the chest of the occupant by the airbag retractor, the chest airbag portion extends from the short side portion of the head airbag portion toward the long side portion of the head airbag portion at least across the seat center axis.

4. The airbag device according to claim 1 or 2, characterized in that: When the airbag device is not in use, the chest airbag portion and the head airbag portion are rolled up or folded in the longitudinal direction to form an elongated cylindrical compressed airbag, and the airbag tightening belt is folded in the cylindrical compressed airbag and arranged at the edge of the seat back, so that the chest airbag portion can drive the airbag tightening belt to pass over the head of the occupant and reach the chest of the occupant during the deployment process.

5. The airbag device according to claim 4, characterized in that: The free length of the airbag tightening belt is greater than the distance from the position point of the chest airbag part in the cylindrical compressed airbag to the position point of the airbag tightener, so that when the chest airbag part is deployed, the airbag tightening belt has enough free length to bypass the head of the occupant and reach the chest of the occupant.

6. The airbag device according to claim 4, characterized in that: The cylindrical compressed airbag is arranged in the seat along the backrest edge of the seat so that the head airbag portion and the chest airbag portion are deployed around the occupant from behind the occupant to the front when deployed.

7. The airbag device according to claim 1 or 2, characterized in that: The head airbag portion and / or the chest airbag portion are formed by cutting and sewing fabrics or by weaving through an integrated weaving technology.

8. The airbag device according to claim 7, characterized in that: When the chest airbag portion is deployed, the fabric area of ​​the chest airbag portion facing the passenger side is smaller than the fabric area of ​​the chest airbag portion facing away from the passenger side.

9. The airbag device according to claim 7, characterized in that: The head airbag portion and the chest airbag portion are connected to each other via a connecting portion, and the connecting portion is configured such that the chest airbag portion can pivot relative to the head airbag portion.

10. The airbag device according to claim 9, characterized in that: When deployed, the fabric area of ​​the connecting portion facing the passenger side is smaller than the fabric area of ​​the connecting portion facing away from the passenger side.

11. The airbag device according to claim 1 or 2, characterized in that: The airbag tightening belt and the chest airbag part are connected to each other through a single-point fixing structure or a multi-point fixing structure.

12. The airbag device according to claim 11, characterized in that: The airbag tightening belt and the chest airbag part are connected to each other through a Y-shaped fixing structure, or are connected to each other through an intermediate connecting piece.

13. The airbag device according to claim 1 or 2, characterized in that: The airbag retractor is configured to retract the airbag retractor belt to a predetermined length, and the airbag retractor is configured to be hydraulically, pneumatically, electrically, magnetically and / or mechanically actuable.

14. The airbag device according to claim 1, characterized in that: The head airbag portion and the chest airbag portion respectively include gas chambers, the gas chambers of the head airbag portion and the chest airbag portion are fluidly connected to each other, and the airbag device has at least one gas generator for inflating the head airbag portion and the chest airbag portion to make them deploy.

15. The airbag device according to claim 1, characterized in that: The head airbag portion and the chest airbag portion respectively include gas chambers, the gas chambers of the head airbag portion and the chest airbag portion are independent of each other and not fluidically connected, and the airbag device has at least two gas generators for respectively inflating the head airbag portion and the chest airbag portion to make them deploy.

16. The airbag device according to claim 14 or 15, characterized in that: The airbag device has a control unit which is designed to trigger the gas generator and subsequently the airbag retractor.

17. The airbag device according to claim 1 or 2, characterized in that: The airbag device includes at least two gas chambers, which are configured to be fluidly connected to each other or not fluidly connected to each other, wherein at least one of the at least two gas chambers includes a part of the gas chamber of the head airbag portion and a part of the gas chamber of the chest airbag portion.

18. The airbag device according to claim 1 or 2, characterized in that: The head airbag portion and / or the chest airbag portion of the airbag device comprises at least two gas chambers, and the at least two gas chambers are configured to be in fluid communication with each other or not in fluid communication with each other.

19. The airbag device according to claim 1 or 2, characterized in that: An upper edge of the chest pocket portion includes a convex profile.

20. The airbag device according to claim 19, characterized in that: The outline of the protrusion is semicircular or semi-oval.

21. The airbag device according to claim 1 or 2, characterized in that: The upper edge of the chest airbag portion comprises a contour with convex sides and concave middle portion.

22. The airbag device according to claim 1 or 2, characterized in that: The airbag device is configured to provide protection for the head and chest of the occupant when the seat is tilted at an angle greater than or equal to 25 degrees.

23. The airbag device according to claim 1 or 2, characterized in that: The head airbag portion comprises a gas chamber, and the gas chamber is continuously connected at least in the direction of the top of the head.

24. A vehicle seat, characterized in that: The vehicle seat has at least one airbag device according to any one of claims 1 to 23 .

25. The vehicle seat according to claim 24, characterized in that The vehicle seat also has a second airbag device that is a separate side airbag provided on a side of the vehicle seat that is close to a door of the vehicle.

26. A vehicle, characterized in that: The vehicle has a vehicle seat according to claim 24 or 25 .

27. The vehicle according to claim 26, characterized in that The vehicle comprises an airbag control unit, which is configured to be signal-connected to at least an airbag device in the vehicle seat, so that the airbag control unit can control at least a triggering of a gas generator and / or an airbag retractor of the airbag device.

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