Safety air bag and automobile

Abstract

The utility model provides a safety air bag and an automobile. The safety air bag comprises an air bag body, a sealing piece and a pull belt. The airbag wall of the airbag body is provided with an air release port, the sealing piece is sewn on the inner side of the airbag body, and the middle parts of two opposite ends of the sealing piece are longer than the air release port; a drawstring hole is formed in one side of the air outlet, and the drawstring penetrates through the drawstring hole; when the drawstring is tensioned, the air release opening is closed, and when the air release opening is closed, the sealing piece is tightly attached to the air release opening so as to seal the air release opening; when the drawstring is loosened, the air release opening is loosened, the sealing piece is blown to the outer side of the air bag body under the air pressure impact of the inner cavity of the air bag body, at least one air outlet channel is formed by the sealing piece and the air release opening, and the air release opening is opened through the air outlet channel. According to the safety air bag, the sealing piece is tightly attached to the air release opening to improve the sealing performance of the safety air bag, after the pull belt is loosened, the air release opening is opened through the air outlet channel formed by the air release opening and the sealing piece, and the safety air bag can be prevented from being unfolded to injure passengers with small weights or incorrect sitting postures while it is guaranteed that the safety air bag is inflated.

Description

Technical Field

[0001] This application relates to the field of automotive safety technology, specifically to an airbag, and also to an automobile. Background Technology

[0002] With the rapid development of science and technology, automobiles have become an indispensable means of transportation for people's daily travel, and people's requirements for the safety performance of automobiles are getting higher and higher. In the event of a car accident, the gas generator inflates the airbag to make the airbag deploy quickly to protect the lives of passengers. Therefore, airbags have become one of the most important protective devices for passengers.

[0003] Currently, when a car accident occurs, the airbags deploy with such high pressure that they have a strong impact force. If the passenger is lightweight or has an incorrect sitting posture, the deployed airbag can easily hit the passenger, causing injury.

[0004] Therefore, there is a need for an airbag that can prevent injury to passengers who are lighter or have poor posture when it first deploys. Utility Model Content

[0005] This application provides an airbag to address the technical problem of how to prevent injury to passengers with lower body weight or improper seating posture during a car accident. This application also provides a car using the aforementioned airbag.

[0006] This application provides an airbag comprising: an airbag body, a sealing plate, and a strap; the airbag body has a vent on its airbag wall; the sealing plate is sewn into the inner side of the airbag body, with its opposite ends sewn into opposite sides of the vent; the length of the portion of the sealing plate located between the opposite ends is greater than the corresponding length of the vent; a strap hole is provided on one side of the vent, and the strap is inserted into the strap hole; the strap is used to close the vent when tightened, and the sealing plate is used to press against the vent to seal it when closed; the strap is used to release the vent when released, thereby causing the sealing plate to be blown to the outside of the airbag body under the air pressure impact of the air inside the airbag body, forming at least one air outlet channel with the vent, and the vent opening through the air outlet channel.

[0007] Optionally, when the vent is closed, the portion of the sealing sheet located between the two opposite ends forms a stacked structure, and the stacked structure is disposed at the vent to block the vent.

[0008] Optionally, the stacked structure is attached to the inner side of the airbag body at the vent.

[0009] Optionally, a through hole is provided on the sealing sheet at a position corresponding to the pull strap hole, and the pull strap passes through the through hole to realize that the pull strap is inserted into the pull strap hole.

[0010] Optionally, when the sealing strip is blown to the outside of the airbag body, the portion of the sealing strip located between the opposite ends forms a gap with the edge of the vent.

[0011] Optionally, the two sides of the portion of the sealing sheet located in the middle of the opposite ends form gaps with the edge of the vent, the sum of the areas of the two gaps is greater than or equal to the area of ​​the vent, and the air outlet channel is the two gaps.

[0012] Optionally, a tear line is provided on the portion of the sealing sheet located in the middle of the opposite ends, the sealing sheet is folded along the tear line, and the two sides of the folded sealing sheet are sewn together.

[0013] When the sealing sheet is blown to the outside of the airbag body, the tear line tears open to form a vent, and the vent opens through the vent.

[0014] This application also provides a vehicle including any of the airbags described above.

[0015] Compared with the prior art, this application has the following advantages:

[0016] This application provides an airbag comprising: an airbag body, a sealing plate, and a strap; the airbag body has a vent on its airbag wall; the sealing plate is sewn into the inner side of the airbag body, with its opposite ends sewn into opposite sides of the vent; the length of the portion of the sealing plate located between the opposite ends is greater than the corresponding length of the vent; a strap hole is provided on one side of the vent, and the strap is inserted into the strap hole; the strap is used to close the vent when tightened, and the sealing plate is used to press against the vent to seal it when closed; the strap is used to release the vent when released, thereby causing the sealing plate to be blown to the outside of the airbag body under the air pressure impact of the air inside the airbag body, forming at least one air outlet channel with the vent, and the vent opening through the air outlet channel.

[0017] The airbag provided in this application inflates and deploys during a car accident. A strap closes the vent when tightened, causing the airbag body on both sides of the vent to move closer together. Simultaneously, a sealing plate located inside the airbag body also presses against the vent to seal it. This can be understood as the vent being closed through the combined action of the strap and the sealing plate, preventing gas leakage from the airbag's internal cavity. When the airbag has fully inflated, if the passenger is lightweight or in an improper posture, the strap loosens to release the restraint on the vent. This allows the sealing plate to be blown to the outside of the airbag body under the pressure impact, forming at least one venting channel with the vent. The vent opens through this venting channel, releasing some gas and gradually reducing the pressure inside the airbag body. This mitigates the impact on the passenger during airbag deployment, preventing injury to lightweight or improperly positioned passengers. Furthermore, it will not compress the airbag walls against the passenger, thus preventing the airbag walls from blocking the passenger's mouth and nose, ensuring that the passenger's breathing is not obstructed, and avoiding secondary accidents caused by the deployment of the airbag. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an example structure of the airbag provided in this application when the strap release device releases the strap.

[0019] Figure 2 yes Figure 1 The diagram shows the structure of the airbag when the strap release mechanism is in the tightened state.

[0020] Figure 3 yes Figure 2 A partial view of the structure of the tensioning strap shown.

[0021] Figure 4 This is a schematic diagram of the structure of a sealing sheet provided in an embodiment of this application.

[0022] Figure 5 This is a schematic diagram of another sealing sheet provided in an embodiment of this application.

[0023] Figure 6 This is a schematic diagram of another example of the structure of the airbag provided in this application when the pull strap release device releases the pull strap.

[0024] Figure 7 yes Figure 6 The diagram shows a partial view of the airbag as the release strap is deployed.

[0025] Figure label:

[0026] 10: Airbag body; 101: Deflator; 102: Strap hole;

[0027] 20: Belt release device; 30: Belt; 40: Gas generator;

[0028] 50: Sealing sheet; 501: Layered structure; 502: Curved edge; 503: Through hole; 504: Tear line; 505: Sewing thread;

[0029] 60: gap; 70: vent hole. Detailed Implementation

[0030] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, in the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In related technologies, when a car accident occurs, the gas generator receives a signal to release gas, causing the airbag to inflate and deploy rapidly, thus protecting passenger safety. However, because the pressure during airbag deployment is too high, if the passenger is lightweight or in an incorrect sitting posture, the airbag can easily impact the passenger, causing injury. For example, a common injury is that the airbag wall may press tightly against the passenger's mouth and nose, further obstructing normal breathing and causing secondary injury.

[0033] Accordingly, this application provides an airbag comprising: an airbag body, a sealing plate, and a strap; the airbag body has a vent on its airbag wall, the sealing plate is sewn inside the airbag body, and the opposite ends of the sealing plate are respectively sewn to opposite sides of the vent, the length of the middle portion of the sealing plate at the opposite ends being greater than the corresponding length of the vent; a strap hole is provided on one side of the vent, and the strap is inserted into the strap hole; the strap is used to close the vent when tightened, and the sealing plate is used to press against the vent to seal the vent when it is closed; the strap is used to release the vent when released, thereby causing the sealing plate to be blown to the outside of the airbag body under the air pressure impact of the air cavity within the airbag body, forming at least one air outlet channel with the vent, and the vent opening through the air outlet channel.

[0034] The airbag provided in this application inflates and deploys when a car accident occurs. When the strap is tightened, it can close the vent. When the strap is tightened, it can also move the airbag body on both sides of the vent towards each other to close the vent. At the same time, the sealing plate will also press against the vent to seal it. It can be understood that the vent is closed by the combined action of the strap and the sealing plate, which prevents the gas in the airbag body cavity from leaking out of the vent, thereby improving the sealing performance of the vent. When the airbag inflates, if the passenger is lightweight or in an improper posture, the straps will loosen to release the constriction on the vent. This allows the sealing plate to be pushed to the outside of the airbag body by the pressure impact within the airbag's internal cavity, forming at least one venting channel with the vent. The vent opens through this channel, releasing some gas and gradually reducing the pressure within the airbag body. This mitigates the impact on the passenger when the airbag deploys, preventing injury to lightweight or improperly positioned passengers. Furthermore, it prevents the airbag walls from compressing the passenger, avoiding obstruction of the mouth and nose, and ensuring unimpeded breathing, thus preventing secondary accidents caused by airbag deployment.

[0035] The airbag provided in this application will now be described in detail with reference to the accompanying drawings.

[0036] Figure 1 This is a schematic diagram of an example structure of the airbag provided in this application when the strap release device releases the strap. Figure 2 yes Figure 1 The diagram shows the structure of the airbag when the strap release mechanism is in the tightened state. Figure 3 yes Figure 2 A partial view of the structure of the tensioning strap shown. Figure 4 This is a schematic diagram of the structure of a sealing sheet provided in an embodiment of this application. Figure 5 This is a schematic diagram of another sealing sheet provided in an embodiment of this application. Figure 6 This is a schematic diagram of another example of the structure of the airbag provided in this application when the pull strap release device releases the pull strap. Figure 7 yes Figure 6 The diagram shows a partial view of the airbag as the release strap is deployed.

[0037] This application provides an airbag, comprising: an airbag body 10, a sealing plate 50, and a strap 30. The airbag can be installed in the center of the steering wheel or in the instrument panel in front of the passenger seat, etc., to provide frontal protection for the driver or front passenger; the airbag can also be installed on the back of the front seats to provide frontal cushioning protection for rear passengers in the rear seats. In this embodiment, there are no specific restrictions on the installation location of the airbag, as long as it meets industry requirements.

[0038] like Figure 1 , Figure 2 and Figure 6 As shown, the airbag body 10 is a bag-shaped structure formed by airbag walls. After inflation, this bag-shaped structure can take on various shapes, such as spherical, ellipsoidal, bundle-like, disc-like, or irregular. The airbag walls are generally made of high-strength and durable fabrics such as nylon or polyester fiber, enabling the airbag to withstand the impact forces generated during a car collision. After the inner cavity of the airbag body 10 is inflated, the airbag body 10 expands under air pressure to form a cushioning structure that supports the human body, protecting the driver or passengers from injury in the event of a car accident.

[0039] like Figure 1 and Figure 6 The airbag body 10 has a vent 101 on its airbag wall. The vent 101 is used to control the release of gas from the airbag cavity to the outside of the airbag body 10 after the airbag is deployed. This allows passengers with smaller weight or those with poor posture to gradually decelerate when they come into contact with the airbag body 10 while absorbing impact energy. This can prevent injury to passengers with smaller weight or those with poor posture due to excessive air pressure in the airbag body 10.

[0040] In this embodiment, the shape of the vent 101 can be circular, elliptical, or square, etc. Furthermore, the number of vents 101 provided on the airbag wall of the airbag body 10 can be one or more; therefore, there is no limitation on the specific shape and number of vents 101. It should be noted that the position of the vent 101 on the airbag wall of the airbag body 10 must meet industry requirements. That is, the vent 101 should avoid being located in a position where it would be pressed down by the passenger when the airbag is deployed, and should avoid being blocked by the passenger's body, thereby preventing the gas inside the airbag body 10 from being unable to release through the vent 101.

[0041] The sealing sheet 50 is sewn inside the airbag body 10, and the two opposite ends of the sealing sheet 50 are respectively sewn to the opposite sides of the vent 101. The length of the portion of the sealing sheet 50 located in the middle of the opposite ends is greater than the corresponding length of the vent 101.

[0042] like Figure 3 As shown, a sealing sheet 50 is sewn onto the inner side of the airbag body 10. The two opposite ends of the sealing sheet 50 can be sewn onto the opposite sides of the vent 101 on the inner side of the airbag body 10 by sewing thread. The remaining two sides of the sealing sheet 50 are not sewn onto the airbag body 10. When the vent 101 needs to be closed, the sealing sheet 50 can assist the pull strap to further seal the vent 101, thereby improving the sealing performance of the vent.

[0043] Because the sealing sheet 50 is relatively long, its length is much greater than that of the vent 101. When the two opposite ends of the sealing sheet 50 are sewn onto the opposite sides of the vent 101, the length of the middle part of the two opposite ends of the sealing sheet 50 is greater than the corresponding length of the vent 101. At this time, the longer middle part will be in a folded state when the vent 101 is closed, so as to seal the vent 101 and further improve the sealing performance of the vent 101.

[0044] Furthermore, in order for the sealing sheet 50 to better seal the vent 101, the length of the sealing sheet 50 in the width direction must also be greater than the corresponding size of the vent 101. This can be understood as the distance between the two unsewn ends of the sealing sheet 50 being greater than the corresponding length of the vent 101. The specific width of the sealing sheet is not limited, as long as it meets the working requirements.

[0045] like Figure 2As shown, a pull strap hole 102 is provided on one side of the vent 101, and the pull strap 30 is inserted into the pull strap hole 102. The pull strap is used to close the vent 101 when tightened, and the sealing plate 50 is used to press against the vent 101 to seal the vent 101 when it is closed.

[0046] The pull strap hole 102 can be located on one side of the vent 101 or on both sides of the vent 101. The choice between providing the pull strap hole 102 on one side or both sides of the vent 101 depends on specific requirements. The pull strap hole 102 can be circular, elliptical, or other shapes. The pull strap hole 102 is for inserting the pull strap 30 into it; therefore, the size of the pull strap hole 102 only needs to be large enough to allow the pull strap 30 to be inserted.

[0047] In one embodiment of this application, a plurality of pull strap holes 102 are provided on one side of the vent 101, such as two, three, or more pull strap holes 102. The pull strap 30 is inserted into the plurality of pull strap holes 102. When the pull strap 30 is tightened, the pull strap 30 in the pull strap hole 102 can drive the airbag wall near the pull strap hole 102 to move closer in the opposite direction, thereby closing the vent 101. It should also be noted that the number of pull strap holes 102 should be moderate, neither too few nor too many. If the number of pull strap holes 102 is too few, it may affect the closing of the vent 101. If the number of pull strap holes 102 is too many, friction will occur between the pull strap 30 and the pull strap holes 102, which may affect the opening of the vent 101.

[0048] In another embodiment of this application, the pull strap holes 102 can be provided on both sides of the vent 101. When the pull strap holes 102 are provided on both sides of the vent 101, the distribution of the pull strap holes 102 on both sides of the vent 101 is the same. This can be understood as the number of pull strap holes 102 on both sides of the vent 101, the spacing between adjacent pull strap holes 102, and the distance of the pull strap holes 102 on both sides from the vent 101 are all equal. Of course, the distribution of the pull strap holes 102 on both sides of the vent 101 can also be different; that is, the number of pull strap holes 102 on both sides of the vent 101 is different, but the spacing between adjacent pull strap holes 102 and the distance of the pull strap holes 102 on both sides from the vent 101 can be equal.

[0049] The pull strap 30 can be inserted through the pull strap holes 102 provided on one or both sides of the vent 101. By inserting the pull strap 30 into the pull strap holes 102 and pulling the pull strap 30, the vent 101 can be closed, preventing gas from leaking from the vent 101 inside the airbag body 10. In this embodiment, the pull strap 30 can be a flexible pull rope or an elastic pull strap.

[0050] In this embodiment, the number of pull straps 30 and the insertion method of the pull straps 30 are not limited, as long as the working requirements are met. The pull straps 30 can be a set of pull straps or multiple sets of pull straps, such as two sets of pull straps. Moreover, the pull straps 30 can be inserted parallel to each other in the pull strap holes, or in other insertion methods, such as being inserted crosswise in the pull strap holes.

[0051] like Figure 2 As shown, the tensioning or releasing of the pull strap 30 is controlled by the pull strap releaser 20. The pull strap 30 is connected to the pull strap releaser 20, that is, the pull strap can be fastened to the pull strap releaser 20, or the pull strap can be looped onto the pull strap releaser 20. Of course, the pull strap can also be fixed to the pull strap releaser 20 in other ways.

[0052] When the gas generator 40 receives a detonation signal but the strap release device 20 does not receive a response signal, the gas generator 40 reacts and releases gas, that is, gas rushes out from the gas generator 40 and quickly fills the airbag body 10. When the airbag is not fully inflated, the strap release device 20 does not respond, and the strap 30 on the vent 101 remains taut. As the airbag body 10 gradually fills, both ends of the strap 30 will gradually tighten, so that the strap 30 will tighten the vent 101. At this time, the sealing plate 50 will also press against the vent to close the vent 101. When the airbag is fully inflated, and it is detected that the passenger is lightweight or has an incorrect sitting posture, the strap release device 20 receives a response signal and will release the strap. Figure 1 and Figure 6 As shown, the pull strap 30 and the sealing sheet 50 are blown open by the air pressure impact inside the airbag body 10, thereby loosening the vent 101.

[0053] There are many ways to configure the pull strap release device 20, which will not be listed here. In this embodiment, the pull strap release device 20 can be a fusing mechanism, in which the pull strap release device 20 can fuse the pull strap 30 when the release time is reached; or, the pull strap release device 20 can be a cutting mechanism, in which the pull strap release device 20 can cut the pull strap 30 when the release time is reached; or, the pull strap release device 20 can also be a retractable structure, in which the end of the pull strap 30 can be fitted onto the retractable end of the retractable structure, and when the release time is reached, the pull strap release device 20 retracts and releases the pull strap 30.

[0054] The above describes the insertion method of the pull strap 30 and the vent 101, and the connection relationship between the pull strap 30 and the pull strap releaser 20. The pull strap 30 is controlled by the pull strap releaser 20, and the pull strap 30 further controls the closing or opening of the vent 101. Of course, in order to improve the airtightness of the vent 101 when closed, the vent 101 is sealed again by the sealing plate 30.

[0055] like Figure 2 As shown, when the pull strap 30 is tightened, the pull strap 30 will drive the airbag wall near the pull strap hole to move towards the opposite direction to close the vent 101. However, at this time, some gas can still leak from the vent 101. In order to improve the sealing effect of the vent 101, there are sealing sheets 50 sewn on both sides of the vent 101. The sealing sheets 50 can be used to fit tightly against the vent 101 when the vent 101 is closed, which can further seal the vent 101.

[0056] like Figure 3 As shown, because the length of the portion of the sealing sheet 50 located in the middle of the two opposite ends is greater than the corresponding length of the vent 101, when the vent 101 is closed, the portion of the sealing sheet 50 located in the middle of the two opposite ends forms a stacked structure 501. The stacked structure 501 is located at the vent 101 to seal it. It can be understood that when the pull strap 30 is tightened, the pull strap 30 will drive the sealing sheet 50 towards the center of the vent 101, thereby causing the portion of the sealing sheet 50 located in the middle to form the stacked structure 501. The stacked structure 501, located at the vent 101, can further seal the vent 101. In other words, when the pull strap 30 is tightened, the vent 101 can be closed through the combined action of the pull strap 30 and the sealing sheet 50.

[0057] The stacked structure 501 is attached to the inner side of the airbag body at the vent 101. The stacked structure 501 can be facing away from the vent 101 to seal it, or it can be facing the vent 101 to seal it. Specifically, the stacked structure 501 is formed by folding the middle portion of the sealing sheet at both opposite ends. The specific folding method is not discussed here, as long as the folded shape meets the requirements of the stacked structure 501. When the vent 101 is closed, the pull strap 30 tightens the vent 101 and also tightens the sealing sheet 50. At this time, the stacked structure 501 on the sealing sheet 50 will be attached to the inner side of the airbag body 10, that is, the stacked structure 501 is attached to the vent 101 to seal the incompletely closed vent 101, thereby improving the sealing performance of the vent 101.

[0058] This can be understood as follows: when the vent 101 needs to be closed, the tensioned strap 30 can close the vent 101. However, the vent 101 is not completely closed at this time, and gas can still leak from the vent 101. At this time, the layered structure 501 on the sealing sheet 50 located inside the airbag body 10 tightly adheres to the inside of the airbag body, sealing the vent 101 again.

[0059] like Figure 4 and Figure 5 As shown, the sealing sheet 50 has inwardly curved edges 502 on both sides of the portion located in the middle of the two opposite ends. These curved edges 502 form the end edges of the stacked structure 501. The middle portion refers to the part between the two ends of the sealing sheet 50 sewn onto the airbag body; that is, the middle portion is located between the fixed ends of the sealing sheet 50. When the vent 101 is closed, the curved edges 502 form the end edges of the stacked structure 501. In other words, when the vent is closed, the curved edges 502 of the sealing sheet can form the end edges of the stacked structure 101.

[0060] The curved edge 502 is a semi-circular shape or an arc, and the two curved edges 502 on both sides are symmetrical. Specifically, the curved edge 502 is located on the side of the middle part of the opposite ends of the sealing sheet. The curved edge 502 is a semi-circular structure that bends inward into the sealing sheet. The curved edge 502 can also be an arc structure. In this embodiment, the curved edge 502 is composed of two semi-circles connected together, that is, the curved edge 502 is distributed on the unsewn side of the sealing sheet, and the curved edge 502 is symmetrical about the vertical center line of the sealing sheet.

[0061] The sealing sheet 50 has a through hole 503 at a position corresponding to the pull strap hole 102. The pull strap 30 passes through the through hole 503 so that the pull strap 30 is inserted into the pull strap hole 102.

[0062] In this embodiment, a through hole 503 is provided on the sealing sheet 50, and the through hole 503 corresponds to the pull strap hole 102. This means that when a pull strap hole 102 is provided on one side of the vent 101, a through hole 503 is provided on the sealing sheet 50 at a position opposite to the pull strap hole 102 on that side. When pull strap holes 102 are provided on both sides of the vent 101, a through hole 503 can be provided on both sides of the sealing sheet corresponding to the pull strap hole 102, or a through hole 503 can be provided on either side of the sealing sheet corresponding to the pull strap hole 102.

[0063] The pull strap 30 passes through the through hole 503. On the one hand, the pull strap 30 can be inserted into the pull strap hole 102. When the pull strap 30 is tightened, the vent 101 can be closed through the pull strap 30. On the other hand, after the pull strap 30 passes through the pull strap hole 102 and then through the through hole 503, when the pull strap 30 is tightened, the pull strap 30 can pull the sealing plate 50 closer to the center of the vent 101, so that the middle part of the sealing plate 50 forms the stacked structure 501, which can seal the vent 101 again.

[0064] The pull strap 30 is used to loosen the vent 101 when released, so that the sealing sheet 50 is blown to the outside of the airbag body 10 under the air pressure impact of the air inside the airbag body 10, and forms at least one air outlet channel with the vent, and the vent 101 opens through the air outlet channel.

[0065] When the detection device detects that a passenger is underweight or has an incorrect posture, air needs to be released through the vent 101 to reduce the air pressure inside the airbag. The pull strap 30 is used to release the air from the vent 101 when released. At this time, the vent 101 is blown open by the air pressure inside the airbag body 10, and the layered structure 501 located at the vent 101 is also pushed outwards from the airbag body 10. This can be understood as a portion of the sealing sheet 50 being blown outwards from the air pressure inside the airbag body 10, and the sealing sheet pushed outwards from the airbag body forms at least one air outlet channel with the vent. The vent 101 opens through this air outlet channel. In this embodiment, the detection device is not specifically limited, as long as it can detect that the passenger is underweight or has an incorrect posture.

[0066] When the sealing sheet 50 is blown to the outside of the airbag body 10, the portion of the sealing sheet 50 located in the middle of the opposite ends forms a gap 60 with the edge of the vent 101. Furthermore, both sides of the portion of the sealing sheet 50 located in the middle of the opposite ends form gaps 60 with the edge of the vent 101, the sum of the areas of the two gaps 60 is greater than or equal to the area of ​​the vent 101, and the air outlet channel is formed by the two gaps.

[0067] like Figure 1 As shown, when the sealing sheet 50 is blown to the outside of the airbag body 10, the vent 101 opens, causing the layered structure originally located at the vent 101 to be blown out to the outside of the airbag body. At this time, the layered structure unfolds, that is, the middle part of the sealing sheet and the edge of the vent 101 form a gap 60. The gap 60 is a closed-loop structure, and the area of ​​the closed-loop structure is the area of ​​the gap 60. That is, the two sides of the sealing sheet located at the middle of the opposite ends respectively form a gap with the edge of the vent, which can form two gaps 60. The area of ​​the two gaps 60 is greater than or equal to the area of ​​the vent 101, to ensure that the gas in the inner cavity of the airbag body can be better discharged from the gaps 60. It should be noted that the shape of the gap 60 is determined by the middle part of the sealing sheet and the edge of the vent 101, that is, the shape of the gap 60 can be elliptical, triangular, etc.

[0068] The sealing sheet 50 has a tear line 504 on the middle portion of its opposite ends. The sealing sheet 50 is folded along the tear line 504, and the two sides of the folded sealing sheet 50 are sewn together. When the sealing sheet 50 is blown to the outside of the airbag body 10, the tear line 504 tears open to form a vent 70, and the vent 101 opens through the vent 70.

[0069] like Figure 5 As shown, a tear line 504 is provided in the middle of the opposite ends of the sealing sheet 50, and the sealing sheet 50 is folded along the tear line 504. The two sides of the folded sealing sheet 50 are sewn together, that is, the two sides of the folded sealing sheet are sewn together by sewing thread 505. Moreover, the sewing thread 505 is located inside the curved edge 502. The left and right sides of the folded sealing sheet are sewn together by sewing thread 505 to form a structure that is similar to a pocket.

[0070] Furthermore, the tear line 504 on the sealing sheet is a weakened sewing thread. The size of the tear line 504 is generally smaller than the size of the vent 101. Of course, it is not excluded that the size of the tear line 504 is equal to or larger than the size of the vent 101. Under the air pressure of the airbag body 10, the tear line 504 can be torn open to allow gas to pass through. Of course, the tear line 504 can also be a long strip or an oval through hole.

[0071] like Figure 6 and Figure 7 As shown, when the sealing sheet 50 is blown to the outside of the airbag body 10, the vent 101 opens, and the tear line 504 tears open to form a vent opening 70. This can be understood as the portion of the sealing sheet 50 located between the two opposite ends forming the vent opening 70 with the tear line 504. The vent 101 opens through the vent opening 70. When the vent 101 opens, the layered structure originally located at the vent 101 is blown out to the outside of the airbag body 10. At the same time, the unfolding of the layered structure also causes the tear line to be blown out. The portion of the sealing sheet located between the two opposite ends forms the vent opening 70 with the tear line, and the gas in the airbag cavity is released through the vent opening 70.

[0072] This application provides an airbag that rapidly inflates and deploys when a car accident occurs. During deployment, the pull strap release device 20 tightens the pull strap, and the pull strap 30 moves the airbag body near the pull strap hole 102 towards the opposite direction to close the vent 101. Simultaneously, the sealing plate 50 located inside the airbag body also adheres to the vent 101 under the action of the pull strap, sealing the vent 101 again. Through the combined action of the pull strap 30 and the sealing plate 50, the sealing performance of the vent 101 is improved, preventing gas from leaking from the vent 101 during airbag deployment, thus enabling the airbag to inflate and deploy quickly and smoothly. When the airbag is fully inflated, the pull strap release device 20 is controlled to release the pull strap, thereby blowing open the sealing plate 50 and the pull strap 30. The sealing plate and the vent 101 form at least one air outlet channel. The vent 101 releases a portion of the gas through the air outlet channel, which can gradually reduce the pressure inside the airbag, making the airbag more elastic and reducing the impact on passengers when the airbag is deployed. This better avoids injury to passengers with smaller body weight or poor posture when the airbag is deployed, and also better avoids blocking the mouth and nose of the passenger due to the compression of the cavity wall, thus freeing the passenger from breathing obstruction and avoiding secondary accidents caused by the deployment of the airbag.

[0073] In addition, the vent 70 in this embodiment is formed by the tear line 504 on the sealing sheet 50 and the portion of the sealing sheet 50 located in the middle of the opposite ends. While satisfying the requirement of sealing the vent 101, the length of the sealing sheet 50 is reduced, the opening time of the vent 101 is shortened, and a portion of gas can be released from the vent 101 in a short time.

[0074] This application also provides a vehicle that includes the aforementioned airbag, as detailed below.

[0075] This application provides a car and an airbag, the airbag comprising: an airbag body 10, a sealing sheet 50 and a strap 30.

[0076] The airbag body 10 has an air vent 101 on its airbag wall. The sealing sheet 50 is sewn into the inner side of the airbag body 10, and the two opposite ends of the sealing sheet 50 are respectively sewn into the opposite sides of the air vent 101. The length of the middle part of the sealing sheet 50 located at the opposite ends is greater than the corresponding length of the air vent 101.

[0077] A pull strap hole 102 is provided on one side of the vent 101, and the pull strap 30 is inserted into the pull strap hole 102.

[0078] The pull strap 30 is used to close the vent 101 when tightened, and the sealing sheet 50 is used to adhere to the vent 101 to seal the vent 101 when it is closed; the pull strap is used to loosen the vent 101 when released, so that the sealing sheet 50 is blown to the outside of the airbag body 10 under the air pressure impact of the air cavity of the airbag body, and forms at least one air outlet channel with the vent, and the vent 101 opens through the air outlet channel.

[0079] The specific implementation of the airbag in this embodiment is analogous to the airbag in the above embodiment. For details, please refer to the relevant content of the above embodiment, which will not be repeated here.

[0080] It should be noted that although several structures, components, or units for implementing the relevant functions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the specific embodiments of this application, the features and functions of two or more structures, components, or units described above can be embodied in one structure, component, or unit. Conversely, the features and functions of one structure, component, or unit described above can be further divided and embodied by multiple components, structures, or units.

[0081] Furthermore, although the various components of the components or apparatus in this application and the mounting arrangements between them are described in a specific order in the accompanying drawings, this does not require or imply that the components or apparatus must be designed according to that specific component or mounting arrangement, or that all the components shown must be included to achieve the desired result. Additional or alternative components may be omitted, multiple components may be combined into one component to achieve the corresponding function, and / or a component may be decomposed into multiple components to achieve the corresponding function, etc.

[0082] Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of this application. Therefore, the scope of protection of this application should be determined by the scope defined in the claims of this application.

Claims

1. An airbag, characterized in that, The airbag includes: an airbag body, a sealing plate, and a strap; The airbag body has an air vent on its airbag wall. The sealing sheet is sewn into the inside of the airbag body, and the two opposite ends of the sealing sheet are respectively sewn into the opposite sides of the air vent. The length of the middle part of the sealing sheet located at the opposite ends is greater than the corresponding length of the air vent. A pull strap hole is provided on one side of the vent, and the pull strap is inserted into the pull strap hole; The pull strap is used to close the vent when tightened, and the sealing sheet is used to press against the vent to seal it when closed; the pull strap is used to loosen the vent when released, so that the sealing sheet is blown to the outside of the airbag body under the air pressure impact of the air cavity inside the airbag body, and forms at least one air outlet channel with the vent, and the vent opens through the air outlet channel.

2. The airbag according to claim 1, characterized in that, When the vent is closed, the portion of the sealing sheet located between the two opposite ends forms a stacked structure, which is disposed at the vent to seal it.

3. The airbag according to claim 2, characterized in that, The layered structure is attached tightly to the inside of the airbag body at the vent.

4. The airbag according to claim 1, characterized in that, The sealing sheet has a through hole at a position corresponding to the pull strap hole, and the pull strap passes through the through hole to allow the pull strap to be inserted into the pull strap hole.

5. The airbag according to claim 1, characterized in that, When the sealing strip is blown to the outside of the airbag body, the portion of the sealing strip located between the two opposite ends forms a gap with the edge of the vent.

6. The airbag according to claim 5, characterized in that, The two sides of the portion of the sealing sheet located in the middle of the two opposite ends form gaps with the edge of the vent, the sum of the areas of the two gaps is greater than or equal to the area of ​​the vent, and the air outlet channel is the two gaps.

7. The airbag according to claim 1, characterized in that, The sealing sheet has a tear line on the middle part of the opposite two ends, the sealing sheet is folded along the tear line, and the two sides of the folded sealing sheet are sewn together. When the sealing sheet is blown to the outside of the airbag body, the tear line tears open to form a vent, and the vent opens through the vent.

8. A car, characterized in that, Including the airbag as described in any one of claims 1-7.

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