Safety air bag and automobile

Abstract

The invention 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 technical field of automotive safety, specifically to an airbag, and also to an automobile. Background Art

[0002] With the rapid development of technology, automobiles have become one of the indispensable means of transportation for people's daily travel, and people's requirements for the safety performance of automobiles are getting higher and higher. When an automobile accident occurs, the gas generator inflates the airbag so that the airbag can quickly deploy to protect the lives of passengers. Therefore, the airbag has become one of the main protective devices for protecting passengers.

[0003] Currently, when an automobile accident occurs, due to the excessive pressure at which the airbag deploys, it has a strong impact force. If the passenger has a small body weight or an improper sitting posture, the deployed airbag body is likely to hit the passenger, causing harm to the passenger.

[0004] Therefore, there is a need for an airbag that can avoid harming passengers with small body weights or improper sitting postures when it first deploys. Summary of the Invention

[0005] This application provides an airbag to solve the technical problem of how to avoid harming passengers with small body weights or improper sitting postures when an automobile accident occurs. This application also provides an automobile using the above airbag.

[0006] This application provides an airbag, which includes: an airbag body, a sealing piece, and a pulling belt; an air release port is provided on the airbag wall of the airbag body, the sealing piece is sewn on the inner side of the airbag body, and the opposite ends of the sealing piece are respectively sewn on the opposite sides of the air release port, and the length of the part of the sealing piece located in the middle of the opposite ends is greater than the corresponding length of the air release port; a pulling belt hole is provided on one side of the air release port, and the pulling belt is inserted through the pulling belt hole; the pulling belt is used to close the air release port when tightened, and the sealing piece is used to tightly adhere to the air release port to seal the air release port when the air release port is closed; the pulling belt is used to loosen the air release port when loosened, so that the sealing piece is blown to the outside of the airbag body under the impact of the air pressure in the inner cavity of the airbag body, and at least one air outlet channel is formed with the air release port, and the air release port opens through the air outlet channel.

[0007] Optionally, when the air release port is closed, the part of the sealing piece located in the middle of the opposite ends forms a laminated structure, and the laminated structure is arranged at the air release port to block the air release port.

[0008] Optionally, the laminated structure tightly adheres to the inner side of the airbag body at the air release port.

[0009] Optionally, through holes are provided at positions on the sealing piece corresponding to the pull - strap holes, and the pull strap passes through the through holes to enable the pull strap to be inserted into the pull - strap holes.

[0010] Optionally, when the sealing piece is blown to the outside of the air - bag body, a gap is formed between the part of the sealing piece located in the middle of the opposite ends and the edge of the air - release port.

[0011] Optionally, gaps are respectively formed between both sides of the part of the sealing piece located in the middle of the opposite ends and the edge of the air - release port, the sum of the areas of the two gaps is greater than or equal to the area of the air - release port, and the air - outlet channel is the two gaps.

[0012] Optionally, a tear line is provided on the part of the sealing piece located in the middle of the opposite ends, the sealing piece is folded along the tear line, and both sides of the folded sealing piece are sewn respectively;

[0013] When the sealing piece is blown to the outside of the air - bag body, the tear line is torn to form an air - release cylinder opening, and the air - release port is opened through the air - release cylinder opening.

[0014] This application also provides an automobile, including the airbag described in any one of the above.

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

[0016] This application provides an airbag, which includes: an air - bag body, a sealing piece and a pull strap; an air - release port is provided on the air - bag wall of the air - bag body, the sealing piece is sewn on the inner side of the air - bag body, and the opposite ends of the sealing piece are respectively sewn on the opposite sides of the air - release port, and the length of the part of the sealing piece located in the middle of the opposite ends is greater than the corresponding length of the air - release port; a pull - strap hole is provided on one side of the air - release port, and the pull strap is inserted into the pull - strap hole; the pull strap is used to close the air - release port when tightened, and the sealing piece is used to tightly adhere to the air - release port to seal the air - release port when the air - release port is closed; the pull strap is used to loosen the air - release port when loosened, so that the sealing piece is blown to the outside of the air - bag body under the impact of the air pressure in the inner cavity of the air - bag body and forms at least one air - outlet channel with the air - release port, and the air - release port is opened through the air - outlet channel.

[0017] The airbag provided by the present application inflates and deploys when the vehicle has an accident. The drawstring is used to close the air release port when tightened. When the drawstring is tightened, it can make the airbag body on both sides of the air release port approach each other in opposite directions. At the same time, the sealing piece located inside the airbag body will also closely adhere to the air release port to seal the air release port. It can be understood that the air release port is closed through the combined action of the drawstring and the sealing piece, preventing the gas in the inner cavity of the airbag body from leaking through the air release port. When the airbag is fully inflated, if the passenger has a small body weight or an improper sitting posture, the drawstring loosens to release the restraint on the air release port. As a result, the sealing piece is blown to the outside of the airbag body under the impact of the air pressure in the inner cavity of the airbag body and forms at least one air outlet channel with the air release port. The air release port opens through the air outlet channel, and a part of the gas can be released through the air outlet channel, gradually reducing the pressure in the inner cavity of the airbag body and slowing down the impact on the passenger when the airbag body deploys, so as to avoid hurting the passenger with a small body weight or an improper sitting posture when the airbag deploys. Moreover, it will not squeeze the passenger with the airbag wall, prevent the airbag wall from blocking the mouth and nose of the human body, and keep the passenger's breathing unobstructed, avoiding secondary accidents caused by the deployment of the airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic structural diagram of the airbag provided by the embodiment of the present application when the drawstring releaser releases the drawstring.

[0019] Figure 2 is Figure 1 The structural schematic diagram of the airbag shown when the drawstring releaser is in a tightened state.

[0020] Figure 3 is Figure 2 The partial view of the structure of the tightened drawstring shown.

[0021] Figure 4 FIG. is a schematic structural diagram of a sealing piece provided by the embodiment of the present application.

[0022] Figure 5 FIG. is a schematic structural diagram of another sealing piece provided by the embodiment of the present application.

[0023] Figure 6 FIG. is a schematic structural diagram of another example of the airbag provided by the embodiment of the present application when the drawstring releaser releases the drawstring.

[0024] Figure 7 is Figure 6 The partial view of the airbag shown when the drawstring releaser releases the drawstring.

[0025] Reference Signs:

[0026] 10: airbag body; 101: air release port; 102: drawstring hole;

[0027] 20: Pull - belt release; 30: Pull - belt; 40: Gas generator;

[0028] 50: Sealing piece; 501: Laminated structure; 502: Curved edge; 503: Through - hole; 504: Tear line; 505: Sewing line;

[0029] 60: Gap; 70: Air - release cylinder opening. Detailed implementation manners

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementations disclosed below.

[0031] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present application. In addition, in the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0032] In the related art, when a vehicle accident occurs, the gas generator receives a signal to release gas to inflate and rapidly deploy the airbag, which can protect the safety of passengers. However, due to the excessive pressure during the deployment of the airbag, if the passenger has a small body weight or an improper sitting posture, the airbag is very likely to hit the passenger, and further cause harm to the passenger. For example, a relatively common harm is that the airbag wall may tightly press on the passenger's mouth and nose, and further hinder the normal breathing of the passenger, causing secondary harm to the passenger.

[0033] In view of this, the present application provides an airbag, which includes: an airbag body, a sealing piece, and a pull strap; a deflation port is provided on the airbag wall of the airbag body, the sealing piece is sewn on the inner side of the airbag body, and the opposite ends of the sealing piece are respectively sewn on the opposite sides of the deflation port, and the length of the part of the sealing piece located between the opposite ends is greater than the corresponding length of the deflation port; a pull strap hole is provided on one side of the deflation port, and the pull strap is inserted into the pull strap hole; the pull strap is used to close the deflation port when tightened, and the sealing piece is used to tightly adhere to the deflation port to seal the deflation port when the deflation port is closed; the pull strap is used to loosen the deflation port when loosened, so that the sealing piece is blown to the outside of the airbag body under the air pressure impact in the inner cavity of the airbag body, and at least one air outlet channel is formed with the deflation port, and the deflation port is opened through the air outlet channel.

[0034] For the airbag provided by the present application, when the airbag is inflated and deployed in a vehicle accident, the pull strap can close the deflation port when tightened. When the pull strap is tightened, it can make the airbag body on both sides of the deflation port approach each other in the opposite direction to close the deflation port. At the same time, the sealing piece will also tightly adhere to the deflation port to seal the deflation port. It can be understood that the deflation port is closed through the combined action of the pull strap and the sealing piece to avoid the leakage of the gas in the inner cavity of the airbag body from the deflation port and improve the sealing performance of the deflation port. When the airbag is fully inflated, if the passenger has a small body weight or an improper sitting posture, the pull strap is loosened to release the restraint on the deflation port, so that the sealing piece is blown to the outside of the airbag body under the air pressure impact in the inner cavity of the airbag body, and at least one air outlet channel is formed with the deflation port. The deflation port is opened through the air outlet channel, and a part of the gas can be released through the air outlet channel, gradually reducing the pressure in the inner cavity of the airbag body, slowing down the impact on the passenger when the airbag body is deployed, and avoiding harm to passengers with a small body weight or an improper sitting posture when the airbag is deployed. Moreover, it will not cause the airbag wall to squeeze the passenger, avoid the airbag wall from blocking the mouth and nose of the human body, prevent the passenger's breathing from being blocked, and avoid secondary accidents caused by the deployment of the airbag.

[0035] Next, the airbag provided by the present application will be described in detail with reference to the accompanying drawings.

[0036] Figure 1 is a schematic structural diagram of the airbag provided by the embodiment of the present application when the pull strap is released by the pull strap release. Figure 2 is Figure 1 a schematic structural diagram of the airbag shown when the pull strap release is in a tightened state. Figure 3 is Figure 2 a partial view of the structure of the tightened pull strap shown. Figure 4 is a schematic structural diagram of a sealing piece provided by the embodiment of the present application.Figure 5 It is a schematic structural diagram of another sealing piece provided by an embodiment of the present application. Figure 6 It is a schematic structural diagram of another example of the airbag provided by an embodiment of the present application when the pull belt is released by the pull belt release device. Figure 7 is Figure 6 A partial view of the airbag shown when the pull belt is released by the pull belt release device.

[0037] The present application provides an airbag, which includes an airbag body 10, a sealing piece 50, and a pull belt 30. The airbag can be installed in the center of the steering wheel or in the instrument in front of the co-pilot seat, etc., to provide frontal protection for the driver or the passenger in the co-pilot seat; the airbag can also be installed on the backrest of the front row seat to buffer and protect the front of the rear passengers on the rear row seat. In the embodiments of the present application, there is no specific limitation on the installation position of the airbag, as long as it meets the industry requirements.

[0038] Such as Figure 1 , Figure 2 and Figure 6 shown, the airbag body 10 is a bag-like structure surrounded by an airbag wall. After inflation, the bag-like structure can present a spherical shape, an ellipsoidal shape, a parcel shape, a pancake shape, an irregular shape, etc. The airbag wall is generally sewn with fabrics such as nylon and polyester fiber fabrics with relatively high strength and durability, so that the airbag can withstand the impact force generated during a vehicle collision. After the inner cavity of the airbag body 10 is inflated, the airbag body 10 will expand under the action of air pressure to form a buffer structure for lifting the human body. When a vehicle accident occurs, it can protect the driver or passenger from being injured.

[0039] Such as Figure 1 and Figure 6 , a deflation port 101 is provided on the airbag wall of the airbag body 10. The deflation port 101 is used to control the airbag to release the gas in the inner cavity of the airbag to the outside of the airbag body 10 through the deflation port 101 after deployment, so as to allow a passenger with a relatively small body weight or a passenger with an improper sitting posture to gradually decelerate when contacting the airbag body 10 while absorbing the impact energy, and can avoid causing injury to a passenger with a relatively small body weight or an improper sitting posture due to excessive air pressure in the airbag body 10.

[0040] In the embodiment of the present application, the shape of the air release port 101 can be circular, oval, square, etc. Moreover, the number of the air release ports 101 provided on the airbag wall of the airbag body 10 can be one or more. Therefore, no limitation is imposed on the specific shape and number of the air release ports 101. It should be noted that the position of the air release port 101 on the airbag wall of the airbag body 10 must comply with industry requirements, that is, the air release port 101 is avoided to be arranged at a position where it will be pressed by a passenger when the airbag works, so as to prevent the air release port 101 itself from being blocked by the passenger's body, and further prevent the gas in the airbag body 10 from not being released through the air release port 101.

[0041] The sealing piece 50 is sewn on the inner side of the airbag body 10, and the opposite ends of the sealing piece 50 are respectively sewn on the opposite sides of the air release port 101. The length of the part of the sealing piece 50 located in the middle of the opposite ends is greater than the corresponding length of the air release port 101.

[0042] As Figure 3 shown, the sealing piece 50 is sewn on the inner side of the airbag body 10. The opposite ends of the sealing piece 50 can be respectively sewn on the opposite sides of the air release port 101 on the inner side of the airbag body 10 through sewing threads. The remaining two sides of the sealing piece 50 are not sewn on the airbag body 10. When the air release port 101 needs to be closed, the sealing piece 50 can assist the pull belt to further seal the air release port 101 to improve the sealing performance of the air release port.

[0043] Since the length of the sealing piece 50 is relatively long, such that the length of the sealing piece 50 is much greater than the length of the air release port 101. When the opposite ends of the sealing piece 50 are respectively sewn on the opposite sides of the air release port 101, the length of the part in the middle of the opposite ends of the sealing piece 50 will be greater than the corresponding length of the air release port 101 at this time. The longer middle part will be in a folded state when the air release port 101 is closed to block the air release port 101 and further improve the sealing performance of the air release port 101.

[0044] Moreover, in order to enable the sealing piece 50 to better seal the air release port 101, the length of the sealing piece 50 in the width direction should also be greater than the corresponding size of the air release port 101. It can be understood that the distance between the two unsewn ends of the sealing piece 50 should be greater than the corresponding length of the air release port 101. The specific width of the sealing piece is not limited as long as it meets the working requirements.

[0045] As Figure 2As shown, a drawstring hole 102 is provided on one side of the air release port 101, and the drawstring 30 is inserted into the drawstring hole 102. The drawstring is used to close the air release port 101 when tightened, and the sealing piece 50 is used to tightly adhere to the air release port to seal the air release port 101 when the air release port 101 is closed.

[0046] The drawstring hole 102 can be provided on one side of the air release port 101 or on both sides of the air release port 101. It can be selected according to specific requirements whether to provide the drawstring hole 102 on one side of the air release port 101 or on both sides of the air release port 101. The drawstring hole 102 can be circular, oval or other shapes. The drawstring hole 102 is for inserting the drawstring 30 into the drawstring hole 102. Therefore, the size of the drawstring hole 102 only needs to be able to insert the drawstring 30 into the drawstring hole 102.

[0047] In an embodiment of the present application, a plurality of drawstring holes 102 are provided on one side of the air release port 101. For example, two, three or more drawstring holes 102 can be provided on one side of the air release port 101. The drawstring 30 is inserted into the plurality of drawstring holes 102. When the drawstring 30 is tightened, the drawstring 30 in the drawstring hole 102 can drive the airbag wall near the drawstring hole 102 to move closer in the opposite direction to close the air release port 101. It should also be noted that the number of drawstring holes 102 should be appropriate, neither too few nor too many. If the number of drawstring holes 102 is too few, it may affect the closing of the air release port 101. If the number of drawstring holes 102 is too many, friction will occur between the drawstring 30 and the drawstring hole 102, which may affect the opening of the air release port 101.

[0048] In another embodiment of the present application, drawstring holes 102 can be provided on both sides of the air release port 101. When drawstring holes 102 are provided on both sides of the air release port 101, the distribution of the drawstring holes 102 on both sides of the air release port 101 is the same. It can be understood that the number of drawstring holes 102 on both sides of the air release port 101, the distance between adjacent drawstring holes 102, and the distance between the drawstring holes 102 on both sides and the air release port 101 are all equal. Of course, the distribution of the drawstring holes 102 on both sides of the air release port 101 can also be different, that is, the number of drawstring holes 102 on both sides of the air release port 101 is different, and the distance between adjacent drawstring holes 102 and the distance between the drawstring holes 102 on both sides and the air release port 101 can be equal.

[0049] The pull belt 30 can be inserted through the pull belt holes 102 provided on one side or both sides of the air release port 101. By inserting the pull belt 30 into the pull belt holes 102, the air release port 101 can be closed by pulling the pull belt 30, preventing the gas in the inner cavity of the airbag body 10 from leaking through the air release port 101. In the embodiments of the present application, the pull belt 30 can be a flexible pull rope or an elastic pull belt.

[0050] In the embodiments of the present application, there are no restrictions on the number of the pull belts 30 and the insertion method of the pull belts 30, as long as the working requirements are met. The pull belt 30 can be a single group of pull belts or multiple groups of pull belts, such as two groups of pull belts. Moreover, the pull belt 30 can be inserted parallelly into the pull belt holes, or in other insertion methods, such as cross-inserted into the pull belt holes.

[0051] As Figure 2 shown, the tightening or releasing of the pull belt 30 is controlled by the pull belt release device 20. The pull belt 30 is connected to the pull belt release device 20, that is, the pull belt can be tied to the pull belt release device 20, or the pull belt can be sleeved on the pull belt release device 20. Of course, the pull belt can also be fixed to the pull belt release device 20 by other means.

[0052] When the gas generator 40 receives an ignition signal while the pull belt release device 20 does not receive a response signal, the gas generator 40 reacts to release gas, that is, the gas rushes out of the gas generator 40 and quickly fills the airbag body 10. When the airbag is not fully inflated, the pull belt release device 20 does not respond, and the pull belt 30 on the air release port 101 remains in a tightened state. As the inner cavity of the airbag body 10 gradually fills, both ends of the pull belt 30 will be gradually tightened, so that the pull belt 30 will tighten the air release port 101. Moreover, at this time, the sealing piece 50 will also be pressed against the air release port to close the air release port 101. When the airbag is fully inflated and it is detected that the passenger has a small body weight or an improper sitting posture, the pull belt release device 20 receives a response signal, and the pull belt release device 20 will loosen the pull belt. As Figure 1 and Figure 6 shown, the pull belt 30 and the sealing piece 50 are blown open by the air pressure in the inner cavity of the airbag body 10, so that the air release port 101 is loosened.

[0053] The setting methods of the pull - belt releaser 20 are numerous and will not be listed one by one here. In the embodiment of the present application, the pull - belt releaser 20 can be a fusing mechanism. When the release timing is reached, the pull - belt releaser 20 can fuse the pull - belt 30 through the high - temperature fusing mechanism; or, the pull - belt releaser 20 can be a cutting mechanism. When the release timing is reached, the pull - belt releaser 20 can cut the pull - belt 30 through the cutting mechanism; or, the pull - belt releaser 20 can also be a contraction structure. The end of the pull - belt 30 can be sleeved on the contraction end of the contraction structure. When the release timing is reached, the pull - belt releaser 20 retracts to loosen the pull - belt 30.

[0054] The above is the interlacing method of the pull - belt 30 and the air - release port 101, and the connection relationship between the pull - belt 30 and the pull - belt releaser 20. The pull - belt 30 is controlled by the pull - belt releaser 20, and the pull - belt 30 further controls the closing or opening of the air - release port 101. Of course, in order to make the airtightness of the air - release port 101 better when it is closed, the air - release port 101 is sealed again by the sealing piece 30.

[0055] As Figure 2 shown, when the pull - belt 30 is tightened, the pull - belt 30 will drive the air - bag wall near the pull - belt hole to move closer in the opposite direction to achieve the closing of the air - release port 101. However, at this time, there will still be a part of the gas leaking from the air - release port 101 when the air - release port 101 is closed. In order to make the sealing effect of the air - release port 101 better, the sealing pieces 50 are sewn on both sides of the air - release port 101 at this time. The sealing pieces 50 can be used to closely adhere to the air - release port 101 when the air - release port 101 is closed, and can further seal the air - release port 101.

[0056] As Figure 3 shown, because the length of the part of the sealing piece 50 located in the middle of the opposite ends is greater than the corresponding length of the air - release port 101, when the air - release port 101 is closed, the part of the sealing piece 50 located in the middle of the opposite ends forms a laminated structure 501. The laminated structure 501 is arranged at the air - release port 101 to block the air - release port 101. It can be understood that when the pull - belt 30 is tightened, the pull - belt 30 will drive the sealing piece 50 to move closer to the center of the air - release port 101, and then the part of the sealing piece 50 located in the middle of the opposite ends forms the laminated structure 501. The laminated structure 501 is located at the air - release port 101 and can further block the air - release port 101. That is to say, when the pull - belt 30 is tightened, the pull - belt 30 and the sealing piece 50 work together to achieve the closing of the air - release port 101.

[0057] The laminated structure 501 is closely attached to the inner side of the airbag body at the air release port 101. The laminated structure 501 can face away from the air release port 101 to block the air release port 101, or it can face the air release port 101 to block the air release port 101. Specifically, the laminated structure 501 is formed by folding the middle part of the sealing sheet at opposite ends. The specific folding method is not discussed here, as long as the shape after folding meets the laminated structure 501. When the air release port 101 is closed, the pull belt 30 tightens the air release port 101 and also tightens the sealing sheet 50. At this time, the laminated structure 501 on the sealing sheet 50 will be closely attached to the inner side of the airbag body 10, that is, the laminated structure 501 adheres to the air release port 101 to block the incompletely closed air release port 101, so as to improve the sealing performance of the air release port 101.

[0058] It can be understood that when the air release port 101 needs to be closed, the pull belt 30 being in a tightened state can close the air release port 101, but at this time the air release port 101 is not completely closed, and there is still gas that can leak from the air release port 101. At this time, the laminated structure 501 on the sealing sheet 50 located inside the airbag body 10 tightly adheres to the inner side of the airbag body, and blocks the air release port 101 again.

[0059] Such as Figure 4 and Figure 5 As shown, the opposite sides of the middle part of the sealing sheet 50 located at opposite ends are inwardly curved edges 502, and the curved edges 502 are used to form the end edges of the laminated structure 501. The middle part refers to the part between the two ends where the sealing sheet 50 is sewn to the airbag body, that is to say, the middle part is located between the fixed two ends of the sealing sheet 50. When the air release port 101 is closed, the curved edges 502 form the end edges of the laminated structure 501, that is to say, when the curved edges 502 of the sealing sheet close the air release port, they can form the end edges of the laminated structure 101.

[0060] The curved edges 502 are semi-circular or arc-shaped, and the two curved edges 502 on both sides are symmetrical. Specifically, the curved edges 502 are located on the sides of the middle part of the sealing sheet at opposite ends. The curved edges 502 are semi-circular structures curved inwardly towards the sealing sheet, and the curved edges 502 can also be arc-shaped structures. In the embodiment of the present application, the curved edges 502 are formed by connecting two semi-circles, that is, the curved edges 502 are distributed on the unsewn sides of the sealing sheet, and the curved edges 502 are symmetrical about the vertical center line of the sealing sheet.

[0061] A through hole 503 is provided at a position on the sealing piece 50 corresponding to the pull - belt hole 102, and the pull - belt 30 passes through the through hole 503 to enable the pull - belt 30 to be inserted into the pull - belt hole 102.

[0062] In the embodiment of the present application, a through hole 503 is provided on the sealing piece 50, and the through hole 503 corresponds to the pull - belt hole 102. It can be understood that when a pull - belt hole 102 is provided on one side of the air - release port 101, a through hole 503 is provided at a position on the corresponding sealing piece 50 on this side opposite to the pull - belt hole 102. When pull - belt holes 102 are provided on both sides of the air - release port 101, through holes 503 can be provided on both sides of the sealing piece corresponding to the pull - belt holes 102, or through holes 503 can be provided on any one side of the sealing piece corresponding to the pull - belt holes 102.

[0063] The pull - belt 30 passes through the through hole 503. On the one hand, it can enable the pull - belt 30 to be inserted into the pull - belt hole 102. When the pull - belt 30 is tightened, the air - release port 101 can be closed through the pull - belt 30. On the other hand, after the pull - belt 30 passes through the pull - belt hole 102 and then through the through hole 503, when the pull - belt 30 is tightened, the pull - belt 30 can pull the sealing piece 50 to approach the center of the air - release port 101, so that the middle part of the sealing piece 50 forms the laminated structure 501, and the air - release port 101 can be blocked again.

[0064] The pull - belt 30 is used to loosen the air - release port 101 when it is released, so that the sealing piece 50 is blown to the outside of the air - bag body 10 under the air pressure impact in the inner cavity of the air - bag body 10, and at least one air - outlet channel is formed with the air - release port, and the air - release port 101 is opened through the air - outlet channel.

[0065] When the detection device detects that the weight of the passenger is small or the sitting posture is incorrect, it is necessary to release air through the air - release port 101 to reduce the air pressure in the airbag. The pull - belt 30 is used to release the restraint of the pull - belt 30 on the air - release port 101 when it is released. The air - release port 101 is blown open under the air pressure in the inner cavity of the air - bag body 10, and the laminated structure 501 at the air - release port 101 will also be blown to the outside of the air - bag body 10. It can be understood that a part of the sealing piece 50 is blown to the outside of the air - bag body 10 under the air pressure impact in the inner cavity of the air - bag body 10, and at least one air - outlet channel is formed between the sealing piece blown to the outside of the air - bag body and the air - release port, and the air - release port 101 is opened through the air - outlet channel. In the embodiment of the present application, the detection device is not specifically limited, as long as it can detect that the weight of the passenger is small or the sitting posture is incorrect.

[0066] When the sealing piece 50 is blown to the outside of the airbag body 10, a gap 60 is formed between the middle part of the sealing piece 50 located between the opposite ends and the edge of the air release port 101. Moreover, gaps 60 are respectively formed between the two sides of the middle part of the sealing piece 50 located between the opposite ends and the edge of the air release port 101, and the sum of the areas of the two gaps 60 is greater than or equal to the area of the air release port 101, and the air outlet channel is the two gaps.

[0067] As Figure 1 shown, when the sealing piece 50 is blown to the outside of the airbag body 10 and the air release port 101 opens, the laminated structure originally located at the air release port 101 is blown out of the outside of the airbag body. At this time, the laminated structure unfolds, that is, a gap 60 is formed between the middle part of the sealing piece and the edge of the air release port 101. The gap 60 is a closed-loop structure, and the area of this closed-loop structure is the area of the gap 60, that is, gaps are respectively formed between the two sides of the middle part of the sealing piece located between the opposite ends and the edge of the air release port, and two gaps 60 can be formed. The sum of the areas of the two gaps 60 is greater than or equal to the area of the air release port 101 to ensure that the gas in the inner cavity of the airbag can be better discharged from the gap 60. It should be noted that the shape of the gap 60 is determined by the middle part of the sealing piece and the edge of the air release port 101, that is, the shape of the gap 60 can be an ellipse or a triangle, etc.

[0068] A tear line 504 is provided on the middle part of the sealing piece 50 located between the opposite ends. The sealing piece 50 is folded along the tear line 504, and the two sides of the folded sealing piece 50 are sewn respectively. When the sealing piece 50 is blown to the outside of the airbag body 10, the tear line 504 is torn to form an air release cylinder opening 70, and the air release port 101 opens through the air release cylinder opening 70.

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

[0070] In addition, the tear line 504 on the sealing piece is a weakened sewing line. Generally, the size of the tear line 504 is smaller than that of the air release port 101. Of course, it is not excluded that the size of the tear line 504 is equal to that of the air release port 101, or the size of the tear line 504 is larger than that of the air release port 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 oval through hole.

[0071] As Figure 6 and Figure 7 shown, when the sealing piece 50 is blown to the outside of the airbag body 10 and the air release port 101 opens, the tear line 504 is torn open to form an air release cylinder opening 70. It can be understood that the part of the sealing piece 50 located in the middle of the opposite ends forms the air release cylinder opening 70 with the tear line 504, and the air release port 101 opens through the air release cylinder opening 70. When the air release port 101 opens, the laminated structure originally located at the air release port 101 is blown out of the airbag body 10. At this time, when the laminated structure unfolds, the tear line will also be blown out. The part of the sealing piece located in the middle of the opposite ends forms the air release cylinder opening 70 with the tear line, and the gas in the airbag inner cavity is released through the air release cylinder opening 70.

[0072] A kind of airbag provided by this application. When the airbag inflates and unfolds rapidly in a vehicle accident, during the unfolding process, the pull - belt release 20 tightens the pull - belt, and the pull - belt 30 drives the airbag body near the pull - belt hole 102 to move closer in the opposite direction, so that the air release port 101 closes. At the same time, the sealing piece 50 located inside the airbag body also presses tightly against the air release port 101 under the action of the pull - belt, sealing the air release port 101 again. Through the combined action of the pull - belt 30 and the sealing piece 50, the sealing performance of the air release port 101 is improved, avoiding the leakage of the gas in the airbag inner cavity from the air release port 101 during the unfolding process of the airbag, and enabling the airbag to inflate and unfold quickly and smoothly. When the airbag is fully inflated, by controlling the action of the pull - belt release 20, the pull - belt release 20 loosens the pull - belt, and then the sealing piece 50 and the pull - belt 30 are blown open. Moreover, at least one air outlet channel is formed between the sealing piece and the air release port, and a part of the gas is released through the air outlet channel of the air release port 101, which can gradually reduce the pressure in the airbag inner cavity, making the airbag more elastic, slowing down the impact on passengers when the airbag unfolds, better avoiding the harm to passengers with a smaller body weight or incorrect sitting postures when the airbag unfolds, and also better avoiding blocking the human mouth and nose due to the extrusion of the cavity wall on the passengers, so that the breathing of the passengers is no longer blocked, and avoiding secondary accidents caused by the unfolding of the airbag.

[0073] In addition, the air release cylinder opening 70 in the embodiments of the present application is formed by the tear line 504 on the sealing piece 50 and the part of the sealing piece 50 located in the middle of the opposite ends. When it can seal the air release opening 101, the length of the sealing piece 50 is reduced, the opening time of the air release opening 101 is shortened, and a part of the gas can be released from the air release opening 101 in a short time.

[0074] The present application also provides an automobile, which includes the above-mentioned airbag, specifically as follows.

[0075] The embodiments of the present application provide an automobile and an airbag. The airbag includes: an airbag body 10, a sealing piece 50, and a pull belt 30.

[0076] An air release opening 101 is provided on the airbag wall of the airbag body 10. The sealing piece 50 is sewn on the inner side of the airbag body 10, and the opposite ends of the sealing piece 50 are respectively sewn on the opposite sides of the air release opening 101. The length of the part of the sealing piece 50 located in the middle of the opposite ends is greater than the corresponding length of the air release opening 101.

[0077] A pull belt hole 102 is provided on one side of the air release opening 101, and the pull belt 30 is inserted into the pull belt hole 102.

[0078] The pull belt 30 is used to close the air release opening 101 when tightened. The sealing piece 50 is used to tightly adhere to the air release opening 101 to seal the air release opening 101 when the air release opening 101 is closed. The pull belt is used to loosen the air release opening 101 when loosened, so that the sealing piece 50 is blown to the outside of the airbag body 10 under the impact of the air pressure in the inner cavity of the airbag, and forms at least one air outlet channel with the air release opening, and the air release opening 101 is opened 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 specific details, refer to the relevant content of the above embodiment, and no redundant description will be made here.

[0080] It should be noted that although several structures, components or units for implementing related functions are mentioned in the above detailed description, this division is not mandatory. In fact, according to the specific implementation of the present 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] In addition, although the various components of the components or devices in the present application and the installation manners between the components are described in a specific order in the accompanying drawings, this does not require or imply that the components or devices must be designed in accordance with the specific components or the installation manners between the components, or that all the shown components must be included to achieve the desired results. Additionally or alternatively, some components may be omitted, multiple components may be combined into one component to achieve the corresponding functions, and / or one component may be decomposed into multiple components to achieve the corresponding functions, etc.

[0082] Although the present application is disclosed above with preferred embodiments, it is not used to limit the present application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application shall be subject to the scope defined by the claims of the present application.

Claims

1. A safety airbag, characterized in that: The safety airbag comprises: an airbag body, a sealing sheet and a drawstring; An air vent is provided on the airbag wall of the airbag body, the sealing sheet is sewn on the inner side of the airbag body, and opposite ends of the sealing sheet are sewn on opposite sides of the air vent respectively, and the length of the portion of the sealing sheet located between the opposite ends is greater than the corresponding length of the air vent; A drawstring hole is provided on one side of the air vent, and the drawstring is inserted into the drawstring hole; The drawstring is used to close the air vent when being tightened, and the sealing sheet is used to stick to the air vent when the air vent is closed to seal the air vent; the drawstring is used to loosen the air vent when being loosened, so that the sealing sheet is blown to the outside of the airbag body under the impact of the air pressure in the inner cavity of the airbag body, and forms at least one air outlet channel with the air vent, and the air vent opens through the air outlet channel.

2. The airbag according to claim 1, characterized in that: When the air leakage port is closed, the portion of the sealing sheet located between the two opposite ends forms a stacked structure, and the stacked structure is arranged at the air leakage port to block the air leakage port.

3. The airbag according to claim 2, characterized in that: The stacked structure is closely attached to the inner side of the airbag body at the air leakage port.

4. The airbag according to claim 1, characterized in that: A through hole is provided on the sealing sheet at a position corresponding to the drawstring hole, and the drawstring passes through the through hole to enable the drawstring to be inserted into the drawstring hole.

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

6. The airbag according to claim 5, characterized in that: The two sides of the portion of the sealing sheet located between the two opposite ends respectively form gaps with the edges of the air leakage port, the sum of the areas of the two gaps is greater than / equal to the area of ​​the air leakage port, and the air outlet channel is the two gaps.

7. The airbag according to claim 1, characterized in that: A tear line is provided on the portion of the sealing sheet located between the two opposite ends, the sealing sheet is folded along the tear line, and the two sides of the folded sealing sheet are sewn respectively; When the sealing sheet is blown to the outside of the airbag body, the tear line is torn to form an air deflation opening, and the air deflation opening is opened through the air deflation opening.

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

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