Airbag

Abstract

Provided in the present invention is an airbag, which is used as a passenger airbag. The airbag comprises an air bag which has a deployed state and a stored state; and a tether arranged on an inner side of the air bag, wherein the air bag is provided with a front panel, and a first side panel and a second side panel which are located on two sides of the front panel; and the tether is provided with a first connection end, a second connection end and a third connection end, the first connection end being fixed to the front panel, and the second connection end and the third connection end being fixed to the first side panel and the second side panel, respectively.

Description

airbags Technical Field

[0001] The present invention relates to a safety device in a vehicle, and in particular to an airbag. Background Art

[0002] Vehicles are equipped with safety devices to protect vehicle occupants in the event of a traffic accident. Airbags are typically used as safety devices in existing vehicles. Airbags include, for example, those located in the steering wheel, those located in the instrument panel, and overhead airbags located on the roof of the vehicle. When the vehicle collides or is impacted, the airbag's gas generator receives a signal transmitted via a wiring harness connected to the gas generator, causing it to explode. The gas generated by the explosion then rapidly inflates the airbag's folded airbag, which expands to protect the occupants from injury caused by the impact.

[0003] The airbag may be provided with a drawstring, which may be located inside the airbag to define the shape of the airbag when deployed.

[0004] Such an airbag is expected to have a simple structure, low production cost, and small size. Summary of the Invention

[0005] An object of the present invention is to provide an airbag having a simple structure, low production cost and small size.

[0006] The present invention provides an airbag used as a passenger airbag, comprising:

[0007] an air bag having a deployed state and a stowed state; and

[0008] a drawstring arranged on the inner side of the air bag,

[0009] in,

[0010] The air bag comprises a front panel and a first side panel and a second side panel located on both sides thereof.

[0011] The drawstring has a first connecting end, a second connecting end and a third connecting end.

[0012] The first connecting end is fixed to the front panel, and the second connecting end and the third connecting end are fixed to the first side panel and the second side panel respectively.

[0013] According to an embodiment of the present invention, the air bag comprises a recessed portion at the first connecting end.

[0014] According to an embodiment of the present invention, the front panel includes a first sub-panel and a second sub-panel connected together via a connecting portion, and when the airbag is in a deployed state, the connecting portion extends from the bottom to the top of the airbag.

[0015] According to an embodiment of the present invention, the drawstring includes a first drawstring and a second drawstring, and one end of the first drawstring and one end of the second drawstring are connected together to serve as the first connection end.

[0016] According to an embodiment of the present invention, the first draw tape and the second draw tape are constructed identically to each other.

[0017] According to an embodiment of the present invention, each of the first draw tape and the second draw tape is configured as a sector-shaped piece, and the two sector-shaped pieces are connected together along an edge where a radius is located.

[0018] According to an embodiment of the present invention, the drawstring includes a free end opposite to the first connecting end, and when the airbag is in the deployed state, the free end is positioned inside a triangle defined by the first connecting end, the second connecting end and the third connecting end.

[0019] According to an embodiment of the present invention, the air bag includes a lower extension portion located below the recessed portion.

[0020] According to an embodiment of the present invention, a pressure relief hole is provided on the first side panel or the second side panel, and the first connection end is provided at the recessed portion.

[0021] According to an embodiment of the present invention, the airbag further includes a rear panel, and the gas generator is disposed on the rear panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The features, advantages and technical effects of the exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the accompanying drawings, the same symbols indicate the same elements, wherein:

[0023] FIG1 schematically shows an airbag according to an embodiment of the present invention.

[0024] FIG. 2 schematically shows a cross-sectional view of the airbag taken along line AA of FIG. 1 .

[0025] FIG3 schematically shows a drawstring in an airbag according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following describes specific embodiments of the airbag according to the present invention in conjunction with the accompanying drawings. The following detailed description and accompanying drawings are intended to illustrate the principles of the present invention. The present invention is not limited to the preferred embodiments described herein. The various embodiments described herein may be used individually or in any combination. The scope of protection of the present invention is defined by the claims.

[0027] In addition, spatially relative terms (such as "upper," "lower," "left," and "right") are used to describe the relative positional relationship of an element shown in the drawings to another element. Therefore, the spatially relative terms can be applied to orientations different from those shown in the drawings when used. Obviously, although all of these spatially relative terms refer to the orientations shown in the drawings for ease of description, those skilled in the art will understand that orientations different from those shown in the drawings can be used.

[0028] Fig. 1 schematically shows an airbag according to an embodiment of the present invention. An airbag according to an embodiment of the present invention will be described below with reference to Fig. 1 .

[0029] As shown in FIG1 , the present invention provides an airbag 1 that is used as a passenger airbag and is installed at a predetermined position on the instrument panel. The airbag 1 includes an airbag 10 and a drawstring 20 (shown in FIG2 and FIG3 ), and the drawstring 20 is arranged on the inner side of the airbag 10 and is therefore not visible in FIG1 . The airbag 10 has a deployed state and a stowed state. The airbag 1 also includes a gas generator (not shown), and the gas generator is used to inflate the airbag 10 so that the airbag 10 expands and enters the deployed state. In order to clearly see the structure of the airbag 10, the airbag 10 shown in FIG1 is in the deployed state, and the right side of the airbag 10 shown in FIG1 will face the occupant when in use.

[0030] Continuing with Figure 1 , it can be clearly seen that the airbag 10 includes a front panel 11, a first side panel 12, a second side panel 13, and a rear panel 14. The first side panel 12 and the second side panel 13 are located on either side of the front panel 11, respectively. The rear panel 14 and the front panel 11 are opposed to each other in the vehicle's front-to-back direction. Furthermore, the first side panel 12 and the second side panel 13 are opposed to each other in the vehicle's left-to-right direction. Together, the front panel 11, the first side panel 12, the second side panel 13, and the rear panel 14 define the interior space of the airbag 10. Furthermore, when the airbag 10 is deployed, a recessed portion 111 is formed in the front panel 11. This recessed portion 111 is designed to accommodate the passenger's head, as will be described in detail below. In one example, an inflator may be disposed in the rear panel 14. Specifically, the inflator may inflate the airbag 10 through vents in the rear panel 14.

[0031] Continuing with FIG1 , as an example, the front panel 11 includes a first sub-panel and a second sub-panel connected together via a connecting portion 15 (e.g., a stitching portion), and when the airbag 10 is in the deployed state, the connecting portion 15 extends from the bottom of the airbag 10 to the top of the airbag 10. Specifically, the first sub-panel and the second sub-panel are symmetrical about the connecting portion 15 in the width direction of the vehicle. That is, the front panel 11 is composed of two identical sub-panels spliced ​​together in the left-right direction, and the connecting portion 15 connecting the two sub-panels extends between the top and bottom of the airbag 10. It should be noted that the connecting portion 15, together with the drawstring 20 to be described below, can be used to restrict the deployed shape of the airbag 10.

[0032] According to one embodiment of the present invention, the airbag 10 may further include a lower extension portion 112 located below the recessed portion 111. It can be understood that the lower extension portion 112 of the airbag 10 may be used to protect the abdomen of the passenger.

[0033] As an example, a pressure relief hole 16 is provided on the first side panel 12. The pressure relief hole 16 is used to partially discharge the gas in the air bag 10 when the passenger, especially the passenger's head, moves to the air bag 10 due to inertia, so as to reduce the impact force exerted by the air bag 10 on the passenger. Of course, a pressure relief hole can also be provided on the second side panel.

[0034] Figure 2 schematically shows a cross-sectional view of the airbag taken along line AA of Figure 1. Figure 3 schematically shows a drawstring in an airbag according to an embodiment of the present invention. The airbag according to an embodiment of the present invention will be described in further detail below with reference to Figures 2 and 3.

[0035] As shown in Figures 2 and 3, the drawstring 20 includes a first drawstring 21 and a second drawstring 22. As an example, the first drawstring 21 and the second drawstring 22 can be constructed to be identical to each other. One end 211 (the right end in the figure) of the first drawstring 21 and one end 221 (the right end in the figure) of the second drawstring 22 are connected together to serve as the first connection end of the drawstring 20, the other end of the first drawstring 21 serves as the second connection end 212 of the drawstring 20, and the other end of the second drawstring 22 serves as the third connection end 222 of the drawstring 20. The first connection end is fixed to the front panel 11, particularly the recessed portion 111 of the front panel 11, and the second connection end 212 and the third connection end 222 are fixed to the first side panel 12 and the second side panel 13, respectively.

[0036] It can be understood that in the airbag 1 of the present invention, the first connection end of the drawstring 20 is connected to the position of the front panel 11 where the recessed portion 111 is to be formed, and the second connection end 212 is connected to the first side panel 12, and the third connection end 222 is connected to the second side panel 13, so that when the airbag 10 is inflated and deployed, the drawstring 20 applies a force toward the inner side of the airbag 10 to the front panel 11 at the first connection end, thereby forming the recessed portion 111 on the front panel 11; and, at the second connection end 212, applies a force toward the inner side of the airbag 10 to the first side panel 12, and at the third connection end 222, applies a force toward the inner side of the airbag 10 to the second side panel 13, thereby limiting the degree of deployment of the airbag 10 in the width direction of the vehicle. Because the front panel 11 is also provided with a connection portion 15, the first connection end of the drawstring 20 can be at least partially connected to the connection portion 15. Therefore, the force applied by the drawstring 20 at the first connection end toward the inside of the airbag 10 can be transmitted along the connection portion 15, so that the recessed portion 111 is also symmetrical about the connection portion 15 in the left-right direction of the vehicle, so as to align with the passenger in the left-right direction of the vehicle. This advantageously avoids accommodating the passenger's head at an angle. When the passenger's head is accommodated in the recessed portion, the passenger's head is prevented from moving along the width direction of the airbag 10 and sliding off the airbag 10 in the event of an oblique collision, for example. Furthermore, due to the force applied by the drawstring 20 at the second connection end 212 and the third connection end 222 toward the inside of the airbag 10, the airbag 10 cannot be deployed to a larger width, which can prevent the airbag 10 from damaging instruments (e.g., display screens) on both sides of the airbag.

[0037] Furthermore, when the aforementioned airbag is installed, for example, in the dashboard to protect the front passenger, the occupant's head moves largely in sync with the vehicle before a collision. During a collision, the vehicle's direction and speed may change dramatically and suddenly. When such a collision triggers the airbag to deploy, the bag accelerates in a specific direction of the vehicle, namely, from the dashboard to the rear. Because the collision itself changes the vehicle's direction of travel, the occupant may no longer move in sync with the vehicle, even with the restraints of a modern three-point seatbelt. Furthermore, the occupant may suffer some degree of injury when impacting the airbag's airbag. For example, the occupant's head may undergo rotational acceleration relative to the spine due to the impact with the airbag's airbag. This rotational acceleration or deceleration may cause injury to the occupant. In other words, when the occupant impacts the airbag's airbag, the occupant's head may experience significant rotation or twisting, potentially causing injury. For example, when a front passenger moves forward during a collision and strikes the airbag's airbag, the occupant's head may rotate about its longitudinal axis with considerable force. Therefore, it is necessary for the airbag to have the function of reducing the rotation speed of the occupant's head during a collision event to reduce the risk of traumatic head / brain injury caused by the occupant's rapid head rotation. The airbag of the present invention has the above function, which will be described in detail below.

[0038] As shown in FIG1 , in the airbag 10 of the present invention, a low fabric tension region is created within the recessed portion 111 and a high fabric tension region is created in the surrounding area. Specifically, the low fabric tension region is located at the connection point of the first connection end of the drawstring 20 of the airbag 10, and the high fabric tension region is located on both sides of the recessed portion 111 of the front panel 11. The low fabric tension region can reduce the possibility of the airbag 10 causing the occupant's head to rotate. The high fabric tension region provides support to prevent or limit the occupant from rushing out of the airbag 10. Therefore, in the airbag of the present invention, the airbag provided with the recessed portion can accommodate the occupant's head and provide support to the side of the head to offset forces on the head that may cause the head to rotate clockwise or counterclockwise about the head's longitudinal axis. As a result, the airbag of the present invention can reliably protect the passenger.

[0039] In the airbag of the present invention, a drawstring with three connecting ends is provided, so that the drawstring itself has a simple structure and the connection steps with the airbag become streamlined, and thus, the airbag has a smaller volume when deployed due to the restrictive effect of the drawstring. Therefore, the airbag of the present invention has the characteristics of a simple structure, lower production cost and smaller volume.

[0040] As an embodiment of the present invention, each of the first drawstring 21 and the second drawstring 22 is constructed as a fan-shaped piece, and the two fan-shaped pieces are connected together along the edge where the radius is located. In other words, in the embodiment shown in Figure 3, a radius edge between one end 211 and the other end 213 of the first drawstring 21 is connected to a radius edge between one end 221 and the other end 223 of the second drawstring 22, and the other end 213 of the first drawstring 21 and the other end 223 of the second drawstring 22 serve as free ends and are not connected to the airbag 10. That is, one end of the radius edge to which the fan-shaped piece is connected serves as the first connection end of the drawstring, and the other end serves as a free end not connected to the airbag. The free end can be positioned inside the triangle defined by the first connection end, the second connection end, and the third connection end to further reduce the manufacturing cost of the drawstring.

[0041] As mentioned above, although the exemplary embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above specific embodiments, and the scope of protection of the present invention should be defined by the claims and their equivalents.

Claims

1. An airbag (1) used as a passenger airbag, comprising: An air bag (10) having an expanded state and a stowed state; and a drawstring (20) arranged on the inner side of the air bag (10), It is characterized by: The air bag (10) comprises a front panel (11) and a first side panel (12) and a second side panel (13) located on both sides thereof. The drawstring (20) has a first connecting end, a second connecting end (212) and a third connecting end (222). The first connection end is fixed to the front panel (11), and the second connection end (212) and the third connection end (222) are fixed to the first side panel (12) and the second side panel (13) respectively.

2. The airbag (1) according to claim 1, wherein: The air bag (10) comprises a recessed portion (111) located at the first connection end.

3. The airbag (1) according to claim 2, wherein: The front panel (11) comprises a first sub-panel and a second sub-panel connected together via a connecting portion (15), and when the air bag (10) is in a deployed state, the connecting portion (15) extends from the bottom of the air bag (10) to the top of the air bag (10).

4. The airbag (1) according to claim 3, wherein: The drawstring (20) comprises a first drawstring (21) and a second drawstring (22), wherein one end of the first drawstring (21) and one end of the second drawstring (22) are connected together to serve as the first connection end.

5. The airbag (1) according to claim 4, wherein: The first draw tape (21) and the second draw tape (22) are constructed identically to each other.

6. The airbag (1) according to claim 5, wherein: Each of the first drawstring (21) and the second drawstring (22) is constructed as a fan-shaped piece, and the two fan-shaped pieces are connected together along the edge where the radius is located.

7. The airbag (1) according to claim 6, wherein: The drawstring (20) includes a free end opposite to the first connection end, and when the air bag (10) is in the deployed state, the free end is positioned inside a triangle defined by the first connection end, the second connection end (212) and the third connection end (222).

8. The airbag (1) according to claim 2, wherein: The air bag (10) comprises a lower extension portion (112) located below the recessed portion (111).

9. The airbag (1) according to claim 2, wherein: A pressure relief hole (16) is provided on the first side panel (12) or the second side panel (13), and the first connection end is provided at the recessed portion (111).

10. The airbag (1) according to claim 1, wherein The air bag (10) further comprises a rear panel (14), and the gas generator is arranged at the rear panel (14).

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