(19)
(11)EP 4 052 971 A1

(12)EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(43)Date of publication:
07.09.2022 Bulletin 2022/36

(21)Application number: 20882589.3

(22)Date of filing:  15.09.2020
(51)International Patent Classification (IPC): 
B60R 21/207(2006.01)
B60R 21/2338(2011.01)
(52)Cooperative Patent Classification (CPC):
B60R 21/207; B60R 21/2338
(86)International application number:
PCT/CN2020/115406
(87)International publication number:
WO 2021/082779 (06.05.2021 Gazette  2021/18)
(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30)Priority: 31.10.2019 CN 201911052364

(71)Applicant: Autoliv Development AB
44783 Vargarda (SE)

(72)Inventors:
  • WANG, Youguang
    Shanghai 201807 (CN)
  • HONG, Dan
    Shanghai 201807 (CN)
  • WANG, Renyong
    Shanghai 201807 (CN)
  • WANG, Liang
    Shanghai 201807 (CN)
  • MO, Bingyi
    Shanghai 201807 (CN)

(74)Representative: Schön, Thilo 
Patentanwaltskanzlei Thilo Schön Grünstraße 1
75172 Pforzheim
75172 Pforzheim (DE)

  


(54)AIRBAG AND AIRBAG ASSEMBLY


(57) A safety airbag (10) and a safety airbag assembly (100) are provided. The safety airbag (10) comprises: an air bag (110) having an inflated state and a stowed state; and a limiting mechanism (120) arranged outside the air bag (110) and configured to limit a position of the air bag (110) in the inflated state. The limiting mechanism (120) comprises an accommodating cavity (1202) and a pull belt (1201). The accommodating cavity (1202) is provided on an outer surface of the air bag (110). The pull belt (1201) is configured to pass through the accommodating cavity (1202).




Description

TECHNICAL FIELD



[0001] The present invention relates to a safety device of a vehicle, in particular, to a safety airbag and a safety airbag assembly.

BACKGROUND



[0002] A safety airbag device is commonly used in a vehicle to protect a passenger in the vehicle from injury in an emergent situation. The safety airbag device includes a safety airbag and a gas generator. The safety airbag is generally in a stowed state, and is inflated only when the vehicle collides or is impacted. When the vehicle collides or is impacted, gas generated by the gas generator by means of explosion quickly inflates the safety airbag in the stowed state, and the inflated safety airbag expands to protect the passenger of the vehicle.

[0003] However, the safety airbag in an expanding inflated state, upon protecting the passenger, may depart from a working position due to an insufficient support force thereof when impacted by the passenger. In this case, there is a risk that the passenger cannot be protected or even other passengers are injured, thereby adversely affecting the reliable operation and safety of the safety airbag.

[0004] Therefore, a safety airbag with high reliability and high safety is desired.

SUMMARY



[0005] An objective of the present invention is to provide a safety airbag and a safety airbag assembly with high reliability and high safety.

[0006] Provided in an aspect of the present invention is a safety airbag, including:

an air bag having an inflated state and a stowed state; and

a limiting mechanism disposed outside the air bag and configured to limit a position of the air bag in the inflated state,

wherein the limiting mechanism comprises an accommodating cavity and a pull belt, the accommodating cavity is provided on an outer surface of the air bag, and the pull belt is configured to pass through the accommodating cavity.



[0007] According to an embodiment of the present invention, the accommodating cavity is configured as a channel extending on at least one panel of the air bag in the inflated state, and the pull belt is configured to be freely movable in the channel.

[0008] Provided in another aspect of the present invention is a safety airbag assembly, including:

the safety airbag according to any one of the foregoing safety airbags; and

a driver seat, the safety airbag being arranged on a right side of the driver seat,

wherein the pull belt is configured such that both ends thereof are respectively fixed to a frame of the driver seat.



[0009] According to an embodiment of the present invention, the air bag, in an inflated state, has a left panel, a right panel, and an intermediate panel connecting the left panel and the right panel, the left panel is closer to a driver than the right panel, and the accommodating cavity of the limiting mechanism is located on the left panel.

[0010] According to an embodiment of the present invention, the accommodating cavity of the limiting mechanism is configured to extend along an outer edge of the left panel.

[0011] According to an embodiment of the present invention, the accommodating cavity is configured to start extending from a top of the left panel of the air bag and stop at a distance from a bottom of the left panel when the air bag is in the inflated state.

[0012] According to an embodiment of the present invention, one end of the pull belt is configured to be fixed to a front side of the frame of the driver seat, and the other end of the pull belt is configured to be fixed to a rear side of the frame of the driver seat.

[0013] According to an embodiment of the present invention, both ends of the pull belt are configured to be spaced apart by a distance in a height direction when being fixed to the frame of the driver seat.

[0014] According to an embodiment of the present invention, both ends of the pull belt are arranged to be detachably fixed to the frame of the driver seat.

[0015] According to an embodiment of the present invention, both ends of the pull belt are respectively provided with a mounting frame having a through hole, and the mounting frames respectively fix both ends of the pull belt to the frame of the driver seat via bolts.

BRIEF DESCRIPTION OF THE DRAWINGS



[0016] FIG. 1 shows a safety airbag according to an embodiment of the present invention.

[0017] FIG. 2 shows a safety airbag assembly according to an embodiment of the present invention.

DETAILED DESCRIPTION



[0018] Specific embodiments of a safety airbag and a safety airbag assembly according to the present invention will be described below with reference to the accompanying drawings. The following detailed description and the accompanying drawings are used to illustratively explain the principles of the present invention. The present invention is not limited to the described preferred embodiments, and the protection scope of the present invention is defined by the claims.

[0019] FIG. 1 shows a safety airbag according to an embodiment of the present invention. The safety airbag according to an embodiment of the present invention is described below with reference to FIG. 1.

[0020] As shown in FIG. 1, a safety airbag 10 according to an embodiment of the present invention includes an air bag 110 and a limiting mechanism 120. The air bag 110 has an inflated state and a stowed state, and the air bag 110 shown in FIG. 1 is in the inflated state for clarity of showing the limiting mechanism 120. The limiting mechanism 120 is arranged outside the air bag 110. Specifically, the limiting mechanism 120 includes an accommodating cavity 1202 and a pull belt 1201. The accommodating cavity 1202 is arranged on an outer surface of the air bag 110 and configured as a channel extending on a panel of the air bag 110, and the pull belt 1201 is configured to pass through the accommodating cavity 1202 and to be freely movable in the accommodating cavity 1202. The limiting mechanism 120 is configured to limit a position of the air bag 110 in the inflated state, which will be described in detail below with reference to FIG. 2.

[0021] FIG. 2 shows a safety airbag assembly according to an embodiment of the present invention. The safety airbag assembly according to an embodiment of the present invention is described below with reference to FIG. 2.

[0022] As shown in FIG. 2, the safety airbag assembly 100 according to an embodiment of the present invention includes the safety airbag 10 shown in FIG. 1 and a driver seat 20, and the safety airbag 10 is arranged on a right side of the driver seat 20. It is to be noted that in describing the safety airbag assembly of the present invention, front, rear, left, and right sides associated with the safety airbag assembly and components thereof are consistent with front, rear, left, and right sides of a vehicle provided with the safety airbag assembly.

[0023] With continued reference to FIG. 2, the pull belt 1201 of the limiting mechanism 120 of the safety airbag device 10 is configured such that both ends thereof are respectively fixed to a frame of the driver seat 20. One example may be that one end of the pull belt is configured to be fixed to a front side of the frame of the driver seat and the other end of the pull belt is configured to be fixed to a rear side of the frame of the driver seat. And, both ends of the pull belt are respectively provided with a mounting frame having a through hole, and the mounting frames respectively fix both ends of the pull belt to the frame of the driver seat via bolts, so that both ends of the pull belt are arranged to be detachably fixed to the frame of the driver seat. However, the safety airbag assembly of the present invention is not limited to the above example, those skilled in the art may arrange, according to actual working conditions, both ends of the pull belt to be permanently fixed to the frame of the driver seat, and both ends of the pull belt may be fixed to the same side of the frame of the driver seat (the front side of the frame or the rear side of the frame).

[0024] With continued reference to FIG. 2, the air bag 110 has a left panel, a right panel, and an intermediate panel connecting the left panel and the right panel in an inflated state. The left panel is closer to a driver than the right panel, and the accommodating cavity 1202 of the limiting mechanism 120 is located on the left panel. In the embodiment shown in FIG. 2, the accommodating cavity 1202 of the limiting mechanism 120 is configured to extend along an outer edge of the left panel to cause the pull belt 1201 to apply a force widely on the left panel of the air bag 110 as much as possible. In addition, the accommodating cavity 1202 is configured to start extending from a top of the left panel of the air bag 110 and stop at a distance from a bottom of the left panel when the air bag 110 is in the inflated state, so as to help the air bag 110 to abut the driver over as large an area as possible. Also, both ends of the pull belt 1201 are configured to be spaced apart by a distance in a height direction when being fixed to the frame of the driver seat 20, thereby effectively limiting the position of the air bag 110.

[0025] Therefore, in the safety airbag and the safety airbag assembly of the present invention, when the air bag of the safety airbag is in the inflated state, if the air bag is impacted by a passenger, e.g. a driver in the driver seat 20 in FIG. 2 impacts the air bag 10 rightwards, the pull belt of the limiting mechanism applies a leftward pulling force on the air bag through the accommodating cavity due to the arrangement of the limiting mechanism outside the air bag of the safety airbag, so that the air bag is sufficiently supported and will not be impacted rightwards by the driver to depart from a working position, or even to impact a front right passenger. Therefore, the safety airbag and the safety airbag assembly of the present invention can achieve the purpose of limiting the position of the air bag in the inflated state of the safety airbag, thereby avoiding a risk that the passenger cannot be protected or even other passengers are injured, and having the advantages of high reliability and high safety.

[0026] Although in the embodiments shown in FIGS. 1 and 2, the accommodating cavity is shown continuously extending along the outer edge of the left panel of the air bag, this is merely an example, and the safety airbag of the present invention is not limited thereto. For example, those skilled in the art may arrange the accommodating cavity of the limiting mechanism as a plurality of sections extending intermittently on the left panel of the air bag according to actual working conditions. For another example, those skilled in the art may arrange the accommodating cavity of the limiting mechanism to extend on both the left panel and the intermediate panel of the air bag according to actual working conditions.

[0027] Further, although an application scenario of the safety airbag of the present invention in a front central safety airbag is shown in FIG. 2, this is merely an example. The safety airbag of the present invention may also be used in a fully-wrapped airbag. In this case, the accommodating cavity of the limiting mechanism is arranged to extend on an inner side surface of the air bag of the fully-wrapped airbag to surround a passenger, so that when the passenger impacts the air bag outwards, the pull belt of the limiting mechanism applies an inward pulling force on the air bag through the accommodating cavity so that the air bag is sufficiently supported and will not be impacted outwards by the driver to depart from the working position. Further, the safety airbag of the present invention may also be used in scenarios of a driver safety airbag, a passenger safety airbag, and a knee safety airbag. The limiting mechanism of the safety airbag of the present invention is disposed outside the air bag of the aforementioned type of safety airbag to provide a supporting force to the air bag in the inflated state in a direction opposite to an impact force subjected thereto, thereby limiting the position of the air bag, so that the air bag of the aforementioned type of safety airbag is sufficiently supported and does not depart from the working position when impacted.

[0028] As described above, although the exemplary embodiments of the present invention have been described in the specification with reference to the accompanying drawings, the present invention is not limited to the aforementioned specific implementations, and the scope of protection of the present invention should be defined by the claims and equivalent meanings thereof.


Claims

1. A safety airbag, comprising:

an air bag having an inflated state and a stowed state; and

a limiting mechanism disposed outside the air bag and configured to limit a position of the air bag in the inflated state,

wherein the limiting mechanism comprises an accommodating cavity and a pull belt, the accommodating cavity is provided on an outer surface of the air bag, and the pull belt is configured to pass through the accommodating cavity.


 
2. The safety airbag according to claim 1, wherein the accommodating cavity is configured as a channel extending on at least one panel of the air bag in the inflated state, and the pull belt is configured to be freely movable in the channel.
 
3. A safety airbag assembly, comprising:

the safety airbag according to claim 1 or 2; and

a driver seat, the safety airbag being arranged on a right side of the driver seat,

wherein the pull belt is configured such that both ends thereof are respectively fixed to a frame of the driver seat.


 
4. The safety airbag assembly according to claim 3, wherein the air bag, in an inflated state, has a left panel, a right panel, and an intermediate panel connecting the left panel and the right panel, the left panel is closer to a driver than the right panel, and the accommodating cavity of the limiting mechanism is located on the left panel.
 
5. The safety airbag assembly according to claim 4, wherein the accommodating cavity of the limiting mechanism is configured to extend along an outer edge of the left panel.
 
6. The safety airbag assembly according to claim 5, wherein the accommodating cavity is configured to start extending from a top of the left panel of the air bag and stop at a distance from a bottom of the left panel when the air bag is in the inflated state.
 
7. The safety airbag assembly according to claim 6, wherein one end of the pull belt is configured to be fixed to a front side of the frame of the driver seat, and the other end of the pull belt is configured to be fixed to a rear side of the frame of the driver seat.
 
8. The safety airbag assembly according to claim 7, wherein both ends of the pull belt are configured to be spaced apart by a distance in a height direction when being fixed to the frame of the driver seat.
 
9. The safety airbag assembly according to claim 8, wherein both ends of the pull belt are arranged to be detachably fixed to the frame of the driver seat.
 
10. The safety airbag assembly according to claim 9, wherein both ends of the pull belt are respectively provided with a mounting frame having a through hole, and the mounting frames respectively fix both ends of the pull belt to the frame of the driver seat via bolts.
 




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