Airbag device, steering wheel assembly structure and vehicle

Abstract

The invention discloses an air bag device, a steering wheel assembly structure and a vehicle. The air bag device comprises a bag, a drawstring adjusting structure and a drawstring. An inflatable part is formed at one end of the bag, the bag comprises a rear panel with an air inlet and a front panel sewn with the rear panel, the inflatable part is located on the rear panel and / or the front panel, and a bearing surface for bearing passengers is formed on the front panel; the drawstring adjusting structure is arranged on the rear panel side of the bag; one end of the drawstring is connected with the drawstring adjusting structure, and the other end of the drawstring is connected to the area, close to the front panel, of the expandable part or connected to the area, close to the expandable part, of the front panel. And the bag has a first unfolding posture in which the inflatable part is not unfolded towards the direction of the passenger and a second unfolding posture in which the inflatable part can be unfolded towards the direction of the passenger. According to the invention, the sitting posture of a passenger with a large-angle sitting posture can be better adapted, and the protection effect on the passenger with the large-angle sitting posture is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile airbags, and in particular to an airbag device, a steering wheel assembly structure and a vehicle. Background Art

[0002] Airbags are critical safety devices installed within a vehicle's steering wheel, protecting the driver in a frontal collision. Due to the extremely narrow interior of the steering wheel, traditional airbags are typically designed to be small to accommodate the limited installation and deployment space. These small airbags effectively deploy and provide necessary protection when the driver adopts a standard or more upright sitting position.

[0003] With the prevalence of adjustable seats, drivers are increasingly adopting a reclining position (such as a "half-reclining" position). This significantly increases the distance between the driver's body (particularly their head and chest) and the steering wheel airbag module. Due to the limited size of traditional small airbag systems, this increased distance results in insufficient deployment travel and coverage. This inability to promptly and adequately catch and cushion the driver's body, hindering effective protection for drivers seated at a reclining position in a collision.

[0004] Based on this, a new technical solution is needed. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide an airbag device, a steering wheel assembly structure, and a vehicle to at least solve the problem that existing frontal airbags cannot provide effective protection for drivers sitting in large-angle positions.

[0006] The embodiments of the present invention provide the following technical solutions:

[0007] An embodiment of the present invention provides an airbag device, comprising a bag, a drawstring adjustment structure, and a drawstring;

[0008] An inflatable portion is formed at one end of the bag, and the bag includes a rear panel with an air inlet and a front panel sewn to the rear panel, the inflatable portion is located on the rear panel and / or the front panel, and the front panel forms a receiving surface for receiving an occupant; the drawstring adjustment structure is provided on the rear panel side of the bag; one end of the drawstring is connected to the drawstring adjustment structure, and the other end is connected to an area of the inflatable portion close to the front panel or to an area of the front panel close to the inflatable portion, and under the action of the drawstring, the bag has a first deployed posture in which the inflatable portion is not deployed in the direction of the occupant and a second deployed posture in which the inflatable portion is deployed in the direction of the occupant;

[0009] When the drawstring adjustment structure does not disconnect or extend the drawstring, the bag can be unfolded into the first unfolding posture, so that the receiving surface can support the occupant in a normal sitting position; when the drawstring adjustment structure disconnects or extends the drawstring, the bag can be unfolded into the second unfolding posture, and at least a portion of the receiving surface in the second unfolding state is folded or rotated by a preset angle toward the direction of the occupant with the other end of the bag as the base point relative to the receiving surface in the first unfolding posture.

[0010] Furthermore, when the bladder is in the second expanded position, the thickness of the bladder tends to gradually decrease from the side where the expandable portion is provided to the opposite side where the expandable portion is provided.

[0011] Furthermore, a notch is provided on one end of the rear panel or the front panel, and the notch is located on a side of the air inlet away from the other end of the bag;

[0012] After the two sides of the gap are sewn together, the rear panel or the front panel forms a pre-three-dimensional structure, and the pre-three-dimensional structure forms the expandable part around the gap. The pre-three-dimensional structure is used to enable the bag to maintain a three-dimensional structure when the bag is not inflated.

[0013] Furthermore, there are multiple notches, which are spaced apart at one end of the rear panel or the front panel.

[0014] Furthermore, the airbag device further comprises:

[0015] A two-stage gas generator, the gas outlet end of which extends into the gas inlet of the bag, is used to enable the bag to expand to the first expansion posture when the drawstring release structure is not extended or the drawstring is not disconnected; or to release a second volume of gas into the bag when the drawstring release structure releases or disconnects the drawstring, so that the bag expands to the second expansion posture.

[0016] Furthermore, a drawstring hole is provided on the rear panel, and the drawstring hole is located on one side of the air inlet. One end of the drawstring passes through the drawstring hole and is connected to a drawstring release structure installed on the outside of the bag.

[0017] Furthermore, the preset rotation angle of the receiving surface is 10 to 50°.

[0018] An embodiment of the present invention further provides a steering wheel assembly structure, characterized in that it includes any of the above-described airbag devices and a steering wheel, wherein the airbag device is installed in the installation position of the airbag device.

[0019] Furthermore, after the bag of the airbag device is deployed, the distance from the air inlet to the edge of the other end of the bag is greater than the distance from the center of the steering wheel to the steering wheel handle.

[0020] An embodiment of the present invention further provides a vehicle, comprising any of the above-described airbag devices, a steering wheel, and a seat; the airbag device is installed in the steering wheel;

[0021] Among them, after the drawstring release structure of the airbag device obtains the tilt angle of the seat, the drawstring release structure releases the drawstring to a preset length according to the tilt angle of the seat. Among them, the greater the tilt angle of the seat, the longer the length released by the drawstring release structure.

[0022] Compared with the prior art, the at least one technical solution adopted in the embodiment of the present invention can achieve the following beneficial effects:

[0023] The airbag device of the present invention forms an inflatable portion at one end of the bag, and uses a drawstring to connect the inflatable portion and the drawstring adjustment structure. By controlling whether the drawstring is disconnected or extended to determine whether the inflatable portion is deployed in the direction of the occupant, the bag as a whole can be formed into a first deployment posture corresponding to the occupant's normal sitting posture and a second deployment posture corresponding to the occupant's high-angle sitting posture. When the bag is in the second deployment posture, at least a portion of the receiving surface in the second state is folded or rotated by a preset angle in the direction of the occupant relative to the receiving surface in the first deployment posture with the other end of the bag as a base point, thereby being able to better fit the sitting posture of the occupant in the high-angle sitting posture, thereby improving the protection effect on the occupant in the high-angle sitting posture. This solves the problem that existing bags cannot cope with high-angle sitting postures. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 This is a schematic diagram of the structure of the existing driver's airbag in response to a sitting posture with a large tilt angle;

[0026] Figure 2 This is a schematic structural diagram of an airbag device according to an embodiment of the present invention for a normal sitting posture;

[0027] Figure 3 This is a schematic diagram of the structure of an airbag device according to an embodiment of the present invention for a sitting posture with a large tilt angle (I);

[0028] Figure 4 This is a schematic diagram of the structure of an airbag device according to an embodiment of the present invention for a sitting posture with a large tilt angle (II);

[0029] Figure 5 and 6 The first deployment posture of the airbag when the drawstring of the airbag device according to the embodiment of the present invention is connected to different positions;

[0030] Figure 7 The second deployment posture of the airbag when the drawstring of the airbag device of the embodiment of the present invention is released or disconnected;

[0031] Figure 8 and 9 Schematic diagram of a panel with different numbers of notches of an airbag device according to an embodiment of the present invention;

[0032] The accompanying drawings of the present invention are as follows:

[0033] 1. Bladder; 11. Air inlet; 12. Inflatable portion; 13. Front panel; 131. Supporting surface; 14. Back panel; 141. Drawstring hole; 15. Notch; 2. Drawstring adjustment structure; 3. Drawstring. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0035] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0036] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0037] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0038] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0039] like Figure 1 As shown, current seat positions and working conditions are becoming increasingly complex. Traditional driver's airbags usually have only a fixed shape and volume, making it difficult to protect additional sitting postures and working conditions. For example, when an occupant sits in a zero-gravity seat at a large inclination angle, the existing driver's airbag is affected by its own expansion volume, making it difficult to effectively protect the occupant sitting at a large inclination angle.

[0040] Specifically, the main driver's airbag is usually installed in the center of the steering wheel. Since the installation position of the center of the steering wheel is small and close to the occupants, the deployment volume of the main driver's airbag is usually smaller, such as smaller than the deployment volume of the co-pilot airbag. Otherwise, the airbag will be difficult to install or the deployment volume will be too large to cause harm to the main driver's occupants. For example, the large deployment volume may cause impact on the occupants' torsos or the large deployment volume may make it impossible to effectively deploy and protect the occupants within a limited time or space.

[0041] Therefore, when the deployment volume of the main driver's airbag is small, if the passenger in the main driver's seat is sitting at a large inclination angle, it will be difficult to deploy the main driver's airbag close to the passenger sitting at a large inclination angle after deployment due to the small deployment volume of the main driver's airbag, and it will be difficult to provide effective / good protection for the passenger sitting at a large inclination angle on the main driver's side.

[0042] In view of this, the inventor conducted in-depth research and improvement exploration on the drawstring 3, the deployment posture of the bag 1, and the shape of the cloth piece of the bag 1, and found that: by changing the shape of the cloth piece of the bag 1, an inflatable part 12 is formed at one end of the bag 1, and the drawstring 3 is connected between the inflatable part 12 and the drawstring adjustment structure 2, so that the bag 1 is controlled by the drawstring 3 to form a first deployment posture in which the inflatable part 12 does not deploy toward the occupant side and a second deployment posture in which the inflatable part 12 deploys toward the occupant side, and in the second deployment posture, the receiving surface 131 of the bag 1 is rotated or folded at a certain angle with the other end of the bag 1 as the base point to form a bag 1 shape that is thick at the top and narrow at the bottom, so that the thickened part of the bag 1 protects the head, neck and other parts of the occupant who is sitting at a large tilt angle, and the narrow part protects the abdominal cavity of the occupant, thereby achieving protection for the occupant who is sitting at a large tilt angle without increasing the volume of the main driver's airbag too much.

[0043] Based on this, this specification proposes a solution: Figures 2 to 7 As shown, an airbag device of the present invention forms an inflatable portion 12 at one end of the bag 1 and forms a receiving surface 131 on the side of the bag 1 facing the occupant; a drawstring adjustment structure 2 is set on the rear panel 14 side of the bag 1, and the drawstring 3 is connected between the inflatable portion 12 and the drawstring adjustment structure 2, so that when the drawstring 3 is not activated, the bag 1 is deployed to a first deployment posture under the action of the drawstring 3, so as to protect the occupant in a normal sitting position when the seat is tilted at a small angle or not tilted, and the small angle can be 0-25°; when the drawstring 3 is activated, the drawstring 3 is disconnected or extended, so that the inflatable portion 12 is deployed toward the occupant side, and drives the bag 1 to deploy to a second deployment posture, so as to form a thick upper and narrow lower structure, so as to protect the occupant in a sitting position with a large tilt angle. The large tilt angle refers to the sitting position of the occupant after the seat back is tilted at a large angle, and the large tilt angle range can be 25-75°.

[0044] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0045] Example 1

[0046] like Figures 2 to 9As shown, an airbag device provided by an embodiment of the present invention includes a bag 1, a drawstring adjustment structure 2 and a drawstring 3; an inflatable portion 12 is formed at one end of the bag 1, and the bag 1 includes a rear panel 14 with an air inlet 11 and a front panel 13 sewn to the rear panel 14, the inflatable portion 12 is located on the rear panel 14 and / or the front panel 13, and the front panel 13 forms a receiving surface 131 for receiving the occupant; the drawstring adjustment structure 2 is arranged on the side of the rear panel 14 of the bag 1; one end of the drawstring 3 is connected to the drawstring adjustment structure 2, and the other end is connected to the area of the inflatable portion 12 close to the front panel 13 or to the area of the front panel 13 close to the inflatable portion 12. Under the action of the drawstring 3, the bag 1 has a first deployment posture in which the inflatable portion 12 is not deployed in the direction of the occupant and a second deployment posture in which the inflatable portion 12 is deployed in the direction of the occupant.

[0047] When the drawstring adjustment structure 2 is not disconnected or the drawstring 3 is not extended, the bag 1 can be unfolded into a first unfolded posture, so that the receiving surface 131 can receive an occupant in a normal sitting position; when the drawstring adjustment structure 2 is disconnected or the drawstring 3 is extended, the bag 1 can be unfolded into a second unfolded posture, and at least a portion of the receiving surface 131 in the second state is folded or rotated by a preset angle toward the direction of the occupant with the other end of the bag 1 as the base point relative to the receiving surface 131 in the first unfolded posture.

[0048] The bag 1 is unfolded into a first unfolding posture or a second unfolding posture under the action of the gas generator. The installation method of the bag 1 and the gas generator is the same as that in the prior art and will not be repeated here.

[0049] The rear panel 14 of the bag 1 is the side close to the windshield or the steering wheel after the bag 1 is unfolded; the front panel 13 of the bag 1 is the side close to the passenger or the seat.

[0050] Preferably, the rear panel 14 and the front panel 13 of the pouch 1 are circular panels or elliptical panels, so as to form a spherical pouch 1 after being unfolded.

[0051] More preferably, after the outer edges of the rear panel 14 and the front panel 13 are sewn together, the pouch 1 described in the present application is formed without using a shaping fabric.

[0052] The expandable portion 12 can be flexibly disposed on the rear panel 14 or the front panel 13 according to needs.

[0053] The receiving surface 131 on the front panel 13 may be an arc-shaped or spherical contour surface, or may form a concave structure or a flat structure under the action of other drawstrings 3 to prevent the occupant's head from rotating relative to the occupant's torso.

[0054] The drawstring adjustment structure 2 can be a disconnecting structure for disconnecting the drawstring 3 , or a retracting structure for shrinking or extending the drawstring 3 .

[0055] Preferably, the drawstring adjustment structure 2 is provided outside the pouch 1 , and the drawstring 3 extends out of the pouch 1 through a through hole in the pouch 1 to be connected with the drawstring adjustment structure 2 .

[0056] Specifically, a drawstring hole 141 is provided on the rear panel 14 , and the drawstring hole 141 is located on one side of the air inlet 11 . One end of the drawstring 3 passes through the drawstring hole 141 and is connected to a drawstring 3 release structure installed on the outside of the bag 1 .

[0057] The drawstring 3 is a fabric drawstring 3 , which may be made of, for example, cloth pieces, or other fabrics or ropes, or a combination of multiple flexible materials.

[0058] Preferably, the preset rotation angle of the receiving surface 131 is 10 to 50 degrees.

[0059] In the present invention, the normal sitting position refers to the sitting position of the passenger when the seat back is tilted at a small angle or not tilted; the large-angle tilt sitting position refers to the sitting position of the passenger when the seat back is tilted at a large angle. The angle of tilt refers to the angle between the seat back and the vertical direction of the seat cushion.

[0060] Preferably, the seat can be tilted at a small angle of 0 to 25 degrees; and the seat can be tilted at a large angle of 25 to 75 degrees.

[0061] In the present application, when the drawstring adjustment structure 2 does not disconnect or extend the drawstring 3, the inflatable portion 12 does not unfold under the action of the drawstring 3 or unfolds in a direction other than where the occupant is, such as upward or in the direction of the steering wheel; when the drawstring adjustment structure 2 disconnects or extends the drawstring 3, the inflatable portion 12 is no longer constrained by the drawstring 3, and it can unfold in the direction where the occupant is, so that one end of the bag 1 is thickened.

[0062] Among them, when the bag 1 is installed on the steering wheel, the inflatable part 12 is located at the upper end of the bag 1, and after the end of the bag 1 with the inflatable part 12 unfolds toward the top of the car and then unfolds toward the direction where the occupant is located, the opposite side of the inflatable part 12 on the bag 1 unfolds toward the bottom of the car, finally forming a bag 1 structure that is thick at the top and narrow at the bottom.

[0063] The working principle of the bag 1 of the present invention is described in detail below by taking the bag 1 as being installed on a steering wheel:

[0064] like Figure 2 As shown, when the occupant is in a normal sitting position, the drawstring adjustment structure 2 does not disconnect or extend the drawstring 3. At this time, in a collision event, under the action of the gas generator and the drawstring 3, the inflatable portion 12 does not deploy toward the occupant, and the bag 1 deploys to a first deployment posture. In the first deployment posture, the bag 1 deploys into a pancake-shaped structure and deploys between the occupant in a normal sitting position and the steering wheel to protect the occupant in a normal sitting position.

[0065] like Figures 3-4 As shown, when the passenger's sitting posture is at a large tilt angle, the drawstring adjustment structure 2 disconnects or extends the drawstring 3. At this time, in a collision event, under the action of the gas generator, the inflatable part 12 and the bag 1 are simultaneously expanded toward the direction of the passenger until they are expanded to the second expanded posture. At this time, the receiving surface 131 of the bag 1 is rotated or folded at a preset angle relative to the receiving surface 131 in the first expanded posture.

[0066] Specifically, if Figure 7 As shown, when the drawstring adjustment structure 2 disconnects or extends the drawstring 3, after the inflatable part 12 is unfolded from the upper end of the bag 1 toward the roof, the bag 1 and the inflatable part 12 continue to unfold toward the direction of the occupant, so that the upper end of the bag 1 is thickened, and the thickness of the lower end remains basically unchanged after unfolding toward the bottom of the car, and its shape adapts to the changes brought about by the thickening of the upper end. At this time, the receiving surface 131 of the bag 1 is rotated or folded at a preset angle relative to the receiving surface 131 in the first unfolded state, so that the contour of the receiving surface 131 is close to the contour of the occupant's torso, so as to better protect the occupant.

[0067] More specifically, when the bag 1 is in the second deployed posture, the thickness of the bag 1 tends to gradually decrease from the side where the inflatable portion 12 is provided to the opposite side where the inflatable portion 12 is provided, so as to adapt to the sitting posture of the occupant.

[0068] When the occupant sits at a large tilt angle, the distance from the occupant's head to the steering wheel and the distance from the occupant's abdominal cavity to the steering wheel gradually decreases, that is, the occupant's head is farthest from the steering wheel, and the occupant's abdominal cavity is closer to the steering wheel than the occupant's head. Therefore, the shape of the bag 1 should be thick at the top and narrow at the bottom to better protect the occupant, so as to avoid the problem that the bottom end of the bag is thicker and causes impact on the occupant's abdominal cavity or ribs, resulting in rib fractures. The bag 1 unfolds quickly and has a greater impact force on the occupant. Therefore, when the bottom end of the bag 1 is thicker, it will directly impact the occupant's abdominal cavity or ribs, resulting in rib fractures.

[0069] The thickness of the pouch 1 may gradually decrease at equal distances or at non-equal distances from the side where the expandable portion 12 is provided to the opposite side where the expandable portion 12 is provided.

[0070] In some of the embodiments, since the bag 1 is made of fabric, it will expand into a spherical contour surface after being inflated. Therefore, after the bag 1 and the inflatable part 12 are simultaneously unfolded toward the direction of the occupant, the middle part of the bag 1 may form an outward convex structure, so that the thickness of the bag 1 tends to first decrease, then increase, and then decrease from the side where the inflatable part 12 is provided to the opposite side where the inflatable part 12 is provided, but as a whole it still gradually decreases from one side of the inflatable part 12 to the opposite side of the inflatable part 12.

[0071] like Figures 8-9As shown, a panel structure for forming the expandable portion 12 is provided as follows.

[0072] Specifically, a notch 15 is provided on one end of the rear panel 14 or the front panel 13, and the notch 15 is located on the side of the air inlet 11 away from the other end of the bag 1; the two side edges of the notch 15 are sewn to the rear panel 14 or the front panel 13 to form a pre-three-dimensional structure, and an outwardly protruding expandable portion 12 is formed on the side of the pre-three-dimensional structure away from the other end of the bag 1. The pre-three-dimensional structure is used to enable the bag 1 to maintain a three-dimensional structure when the bag 1 is not inflated.

[0073] Among them, by setting a notch 15 on the rear panel 14 or the front panel 13 and sewing the two side edges of the notch 15 to each other, a funnel-shaped pre-stereoscopic structure can be formed; after the bag 1 with a funnel-shaped pre-stereoscopic structure is formed, if the bag 1 is restrained by the drawstring 3, the funnel-shaped pre-stereoscopic structure will not unfold or will not unfold toward the occupant. At this time, the bag 1 unfolds to the first unfolding posture under normal conditions; after the drawstring 3 is extended or disconnected, the funnel-shaped pre-stereoscopic structure unfolds, so that the thickness of the upper end of the bag 1 increases, and the thickness of the lower end of the bag 1 adaptively changes, thereby forming a bag 1 structure that is thick at the top and narrow at the bottom, so as to protect occupants sitting at a large tilt angle.

[0074] In particular, since the bag 1 can maintain a three-dimensional structure under the effect of the pre-three-dimensional structure when not inflated, the amount of gas required for the bag 1 to be fully deployed can be reduced.

[0075] Preferably, the notch 15 is located above the center of the panel, so that after sewing both sides of the notch 15 together, an eccentric structure is formed, that is, the expandable portion 12 is formed at the upper end of the bag 1 .

[0076] More preferably, a preset distance is reserved between the starting point of the notch 15 and the air inlet 11 so that the pouch 1 forms an eccentric structure, so that the pouch 1 can subsequently form a structure that is thick at the top and narrow at the bottom.

[0077] For example, the preset distance between the starting point of the notch 15 and the air inlet 11 is 100-400 mm.

[0078] In some embodiments, there are multiple notches 15 , which are spaced apart at one end of the rear panel 14 or the front panel 13 to change the shape of the pre-three-dimensional structure.

[0079] Preferably, when there are two notches 15 and they are symmetrically arranged on both sides of the front panel 13, the two notches 15 are located on the upper side of the center of the front panel 13, and after the two side edges of each notch 15 are sewn together, a funnel shape is formed at both ends, and the middle is an arc-shaped contour surface shape, so as to better accommodate the occupant's head and avoid forming an outward convex structure or funnel structure on the front panel 13 of the bag 1, which may cause damage to the occupant's face.

[0080] In this embodiment, the edge of the notch 15 can be straight or arc-shaped to optimize the position of the suture.

[0081] In some of the embodiments, the airbag device also includes a two-stage gas generator, the gas outlet end of the two-stage gas generator extends into the air inlet 11 of the bag 1, and is used to enable the bag 1 to expand to a first expansion posture when the release structure of the drawstring 3 is not extended or the drawstring 3 is not disconnected; or to release a second volume of gas into the bag 1 when the release structure of the drawstring 3 is released or the drawstring 3 is disconnected, so that the bag 1 expands to a second expansion posture.

[0082] The dual-stage gas generator is used to adapt to two deployment postures of the bag 1 and can release different volumes of gas.

[0083] In some of the embodiments, when an exhaust hole is provided on the rear panel 14, when the active release mechanism is not triggered, the exhaust hole is directed toward the steering wheel side. After the active release mechanism is triggered and the upper end of the bag 1 is thickened, the jet direction of the exhaust hole rotates toward the door side, and the change angle is less than 90°.

[0084] When the airbag device of the embodiment of the present invention is folded, the pre-three-dimensional part on the rear panel 14 or the front panel 13 is first folded from the edge peripheral seam to the three-dimensional part between the gas generator installation port to form a flat state, and then the bag 1 is folded in a disordered manner.

[0085] The bag 1 in the airbag device of the embodiment of the present invention is composed of two parts, front and back, and the rear panel 14 away from the passenger side forms a pre-three-dimensional structure, and the drawstring 3 or rope fixed to the air inlet 11 is connected to the three-dimensional joint part of the bag 1, so that after the drawstring 3 is released, the length of the joint part is released accordingly, and the volume of the bag 1 increases in thickness in the length direction of the entire vehicle to achieve the volume and shape change of the bag 1.

[0086] Example 2

[0087] An embodiment of the present invention provides a steering wheel assembly structure, characterized in that it includes an airbag device and a steering wheel as described in any one of Example 1, and the airbag device is installed in the installation position of the airbag device.

[0088] Preferably, after the bag 1 of the airbag device is deployed, the distance from its air inlet 11 to the edge of the other end of the bag 1 is greater than the distance from the center of the steering wheel to the steering wheel handle, so that the steering wheel handle can support the bottom end of the bag 1, thereby preventing the bag 1 from tilting due to lack of support after being hit, causing the occupant to hit the steering wheel.

[0089] Example 3

[0090] A vehicle according to an embodiment of the present invention is characterized by comprising any of the above-described airbag devices, a steering wheel, and a seat; the airbag device is installed in the steering wheel;

[0091] Among them, after the strap 3 release structure of the airbag device obtains the inclination angle of the seat, the strap 3 release structure releases the strap 3 to a preset length according to the inclination angle of the seat. Among them, the greater the inclination angle of the seat, the longer the length released by the strap 3 release structure.

[0092] Among them, the airbag device is only deployed to the second deployment posture when the occupant adjusts from a normal sitting position to a sitting position with a large tilt angle, and when the vehicle control system detects that the seat is adjusted from the default angle to a large tilt angle, it drives the active release mechanism to release the pull strap 3, so that the upper end of the bag 1 is thickened and the lower end is inconvenient to fill the regional space formed between the occupant's normal sitting position and the sitting position with a large tilt angle.

[0093] Among them, when the vehicle control system detects the tilt angle of the seat through the sensor, if a collision occurs, the vehicle control system can control the release structure of the drawstring 3 to release the drawstring 3 of the corresponding length according to the tilt angle of the seat, so that after the bag 1 is unfolded to the second unfolding posture, the receiving surface 131 of the bag 1 can cooperate with the sitting posture of the occupant to better bear the occupant posture, avoiding the problem of the bag 1 hitting the face due to the large unfolding thickness of the upper end of the bag 1 when the occupant's tilt angle is small, or avoiding the problem of the bag 1 being unable to effectively protect the occupant's head due to the small unfolding thickness of the upper end of the bag 1 when the occupant's tilt angle is large.

[0094] In this specification, references to the same or similar parts between the various embodiments can be made to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the product embodiments described later, since they correspond to the methods, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0095] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An airbag device, characterized in that: It comprises a bladder bag (1), a drawstring adjustment structure (2) and a drawstring (3); An inflatable portion (12) is formed at one end of the bag (1), and the bag (1) comprises a rear panel (14) having an air inlet (11) and a front panel (13) sewn to the rear panel (14), the inflatable portion (12) is located on the rear panel (14) and / or the front panel (13), and the front panel (13) forms a receiving surface (131) for receiving an occupant; the drawstring adjustment structure (2) is arranged on the rear panel (14) side of the bag (1); one end of the drawstring (3) is connected to the drawstring adjustment structure (2), and the other end is connected to a region of the inflatable portion (12) close to the front panel (13) or to a region of the front panel (13) close to the inflatable portion (12); under the action of the drawstring (3), the bag (1) has a first deployment posture in which the inflatable portion (12) is not deployed in the direction of the occupant and a second deployment posture in which the inflatable portion (12) is deployed in the direction of the occupant; When the drawstring adjustment structure (2) does not disconnect or extend the drawstring (3), the bag (1) can be unfolded into the first unfolding posture, so that the receiving surface (131) can receive an occupant in a normal sitting position; when the drawstring adjustment structure (2) disconnects or extends the drawstring (3), the bag (1) can be unfolded into the second unfolding posture, and at least a portion of the receiving surface (131) in the second unfolding state is folded or rotated by a preset angle in the direction of the occupant relative to the receiving surface (131) in the first unfolding posture with the other end of the bag (1) as a base point.

2. The airbag device according to claim 1, characterized in that When the bladder (1) is in the second unfolding posture, the thickness of the bladder (1) tends to gradually decrease from the side where the expandable portion (12) is provided to the opposite side where the expandable portion (12) is provided.

3. The airbag device according to claim 1, wherein: A notch (15) is provided on one end of the rear panel (14) or the front panel (13), and the notch (15) is located on a side of the air inlet (11) away from the other end of the bag (1); After the two sides of the notch (15) are sewn together, the rear panel (14) or the front panel (13) forms a pre-stereoscopic structure, and the pre-stereoscopic structure forms the expandable portion (12) around the notch (15). The pre-stereoscopic structure is used to enable the bag (1) to maintain a three-dimensional structure when the bag (1) is not inflated.

4. The airbag device according to claim 3, characterized in that: There are multiple notches (15) and they are spaced apart and arranged at one end of the rear panel (14) or the front panel (13).

5. The airbag device according to claim 1, wherein: Also includes: A two-stage gas generator, wherein the gas outlet end of the two-stage gas generator extends into the gas inlet (11) of the bag (1), and is used to enable the bag (1) to be deployed to the first deployment posture when the release structure of the drawstring (3) is not extended or the drawstring (3) is not disconnected; Or when the drawstring (3) release structure releases or disconnects the drawstring (3), a second volume of gas is released into the pouch (1), so that the pouch (1) is unfolded into the second unfolding posture.

6. The airbag device according to claim 1, characterized in that A drawstring hole (141) is provided on the rear panel (14), and the drawstring hole (141) is located on one side of the air inlet (11). One end of the drawstring (3) passes through the drawstring hole (141) and is connected to a drawstring (3) release structure installed on the outside of the bag (1).

7. The airbag device according to claim 1, characterized in that: The preset rotation angle of the receiving surface (131) is 10 to 50 degrees.

8. A steering wheel assembly structure, characterized in that: The invention comprises an airbag device and a steering wheel according to any one of claims 1 to 7, wherein the airbag device is installed in the installation position of the airbag device.

9. The steering wheel assembly structure according to claim 8, characterized in that: After the bag (1) of the airbag device is unfolded, the distance from the air inlet (11) to the edge of the other end of the bag (1) is greater than the distance from the center of the steering wheel to the steering wheel handle.

10. A vehicle, characterized in that: The invention comprises an airbag device, a steering wheel and a seat according to any one of claims 1 to 7; the airbag device is installed in the steering wheel; Wherein, after the drawstring (3) release structure of the airbag device obtains the tilt angle of the seat, the drawstring (3) release structure releases the drawstring (3) to a preset length according to the tilt angle of the seat, wherein the greater the tilt angle of the seat, the longer the length released by the drawstring (3) release structure.

Images