Airbag and automobile

Abstract

The present application provides an airbag and an automobile. The airbag comprises: an airbag body, a tether actuator, and tethers; an air release port is formed on the airbag wall of the airbag body, tether holes are formed on one side of the air release port, the tethers are inserted into the tether holes, the tethers are used for closing the air release port when tensioned, and the tethers are connected to the tether actuator; when the tether actuator is in a tensioning state, the tether actuator tensions the tethers to close the air release port; when the tether actuator is in a releasing state, the tether actuator loosens the tethers so that the tethers are blown open under the impact of air pressure in an inner cavity of the airbag body, making the air release port opened. In the present application, by tensioning or loosening the tethers, the air release port is closed or opened. Further, the airbag can avoid, during deployment of the airbag, injuries to passengers with small body weights or improper sitting postures while ensuring inflation of the airbag.

Description

Airbag and automobile

[0001] The present application claims priority to the Chinese Patent Application No. 202410790107.4, filed on June 18, 2024, and titled "Airbag and automobile", and the Chinese Patent Application No. 202510107939.6, filed on January 22, 2025, and titled "Airbag and automobile", the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of automobile safety, in particular to an airbag, and further relates to an automobile. BACKGROUND

[0003] The airbag is one of the important components in the automobile safety system. When an automobile accident occurs, the airbag is inflated and expanded by the gas generated by the gas generator, so as to protect the life safety of the passengers and avoid injuries to the passengers.

[0004] At present, when an automobile accident occurs, the airbag has a strong impact due to the too large pressure of the airbag expansion. If the passenger has a small body weight or an improper sitting posture, the expanded airbag body is easy to hit the passenger and cause injuries.

[0005] Therefore, it is needed to provide an airbag which can avoid injuries to the passenger with a small body weight or an improper sitting posture when the airbag is initially expanded. SUMMARY

[0006] The present application provides an airbag to solve the technical problem of how to avoid injuries to the passenger with a small body weight or an improper sitting posture when an automobile accident occurs. The present application also provides an automobile using the above airbag.

[0007] The present application provides an airbag, which comprises an airbag body, a pull belt reactor and a pull belt.

[0008] The airbag wall of the airbag body is provided with a deflation port, one side of the deflation port is provided with a pull belt hole, the pull belt is inserted into the pull belt hole, the pull belt is used to close the deflation port when being pulled tight, and the pull belt is connected to the pull belt reactor.

[0009] When the pull belt reactor is in a pulled tight state, the pull belt reactor closes the deflation port by pulling the pull belt tight. When the pull belt reactor is in a released state, the pull belt reactor loosens the pull belt, so that the pull belt is blown open under the impact of the air pressure in the airbag body cavity, so as to open the deflation port.

[0010] Optionally, one side of the air vent is provided with a plurality of the drawstring holes.

[0011] Alternatively, both sides of the air vent are respectively provided with the drawstring holes.

[0012] Optionally, when both sides of the air vent are respectively provided with the drawstring holes, one end of the drawstring is fixed on the airbag wall of the airbag body, and the other end is inserted back and forth in each of the drawstring holes and extends out to be connected to the drawstring reactor.

[0013] Optionally, after the drawstring is inserted through the drawstring holes, both ends of the drawstring are fixed on the drawstring reactor.

[0014] Optionally, one side of the air vent is provided with a plurality of the drawstring holes, after the drawstring is inserted through the drawstring holes, both ends of the drawstring are respectively fixed on the airbag wall of the airbag body, and the closed end of the drawstring extending out of the drawstring hole is connected to the drawstring reactor.

[0015] Optionally, a fixing sheet is fixed on the airbag wall of the airbag body, after the drawstring is inserted through the drawstring holes, both ends of the drawstring are respectively fixed on the fixing sheet.

[0016] Optionally, a ferrule is fixedly sleeved on the outer periphery of the closed end of the drawstring extending out of the drawstring hole, and the ferrule is connected to the drawstring reactor through a connecting belt.

[0017] Optionally, the drawstring includes a plurality of groups of drawstrings, and adjacent groups of drawstrings in the plurality of groups of drawstrings are crossed and inserted into corresponding drawstring holes.

[0018] Alternatively, each group of drawstrings in the plurality of groups of drawstrings is inserted into a corresponding drawstring hole.

[0019] Optionally, both sides of the air vent are respectively provided with the drawstring holes, and the drawstring is inserted back and forth through each of the drawstring holes on the upper and lower sides of the air vent.

[0020] Alternatively, the drawstring is inserted back and forth through each of the drawstring holes in parallel on the upper and lower sides of the air vent.

[0021] The application also provides an automobile, which comprises the airbag of any one of the above.

[0022] Compared with the prior art, the application has the following advantages:

[0023] The application provides a safety air bag, which comprises an air bag body, a pull belt reactor and a pull belt.

[0024] When the safety air bag inflates and expands in the event of an automobile accident, the pull belt reactor is in a tension state, the pull belt reactor closes the air release port by tensioning the pull belt, so that the gas in the air bag body cavity is prevented from leaking from the air release port. When the safety air bag completes inflation, if the passenger has a small body weight or an improper sitting posture, the action of the pull belt reactor is controlled, so that the pull belt reactor is in a release state. At this time, the pull belt reactor loosens the pull belt, and then the air release port is opened, a part of the gas is released from the air release port, the pressure in the air bag body cavity can be gradually reduced, the impact of the air bag body expansion on the passenger is slowed down, so that the passenger with a small body weight or an improper sitting posture is prevented from being injured when the safety air bag expands. Moreover, the passenger is prevented from being squeezed by the air bag wall, the air bag wall is prevented from blocking the mouth and nose of the passenger, the breathing of the passenger is prevented from being blocked, and a secondary accident caused by the expansion of the safety air bag is prevented. Meanwhile, the air release port is closed or opened by tensioning or loosening the pull belt, and the safety air bag has the advantages of simple structure, easy installation and low price. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 is a structural schematic view of a safety air bag provided by the embodiment of the application, in which the pull belt reactor is in a tension state.

[0026] Fig. 2 is a structural schematic view of a safety air bag provided by the embodiment of the application, in which the pull belt reactor is in a release state.

[0027] Fig. 3 is a schematic view of the state of a pull belt reactor and a pull belt provided by the embodiment of the application, in which one end of the pull belt is fixed on the air bag wall of the air bag body, the other end of the pull belt is connected to the pull belt reactor, and the pull belt reactor is in a tension state.

[0028] Fig. 4 is a schematic view of the state of a pull belt reactor and a pull belt provided by the embodiment of the application, in which one end of the pull belt is fixed on the air bag wall of the air bag body, the other end of the pull belt is connected to the pull belt reactor, and the pull belt reactor is in a release state.

[0029] Figure 5 is a schematic diagram of the state of the pull strap and the pull strap reactor when the two ends of the pull strap of a safety air bag provided by the embodiment of the present application are fixed on the pull strap reactor and the pull strap reactor is in a tensioned state.

[0030] Figure 6 is a schematic diagram of the state of the pull strap and the pull strap reactor when the two ends of the pull strap of a safety air bag provided by the embodiment of the present application are fixed on the pull strap reactor and the pull strap reactor is in a released state.

[0031] Figure 7 is a schematic diagram of the structure of the pull strap when the two ends of the pull strap of a safety air bag provided by the embodiment of the present application are fixed on the air bag wall of the air bag body and the pull strap reactor is in a tensioned state.

[0032] Figure 8 is a schematic diagram of the structure of the pull strap when the two ends of the pull strap of a safety air bag provided by the embodiment of the present application are fixed on the air bag wall of the air bag body and the pull strap reactor is in a released state.

[0033] Figure 9 is a schematic diagram of the structure of the adjacent groups of pull straps of a partial inner wall of a safety air bag provided by the embodiment of the present application after being fixed on the fixing sheet after being crossed.

[0034] Figure 10 is a schematic diagram of the structure of the adjacent groups of pull straps of a partial outer wall of a safety air bag provided by the embodiment of the present application after being fixed on the fixing sheet after being crossed.

[0035] Figure 11 is a schematic diagram of the structure of the adjacent groups of pull straps of a partial inner wall of a safety air bag provided by the embodiment of the present application after being fixed on the air bag wall without being crossed.

[0036] Figure 12 is a schematic diagram of the structure of the adjacent groups of pull straps of a partial outer wall of a safety air bag provided by the embodiment of the present application after being fixed on the air bag wall without being crossed.

[0037] Figure 13 is a schematic diagram of the structure of the pull strap of a safety air bag provided by the embodiment of the present application connected on the fixing sheet.

[0038] Figure 14 is a schematic diagram of the structure of the pull strap of a safety air bag provided by the embodiment of the present application connected on the air bag wall.

[0039] Figure 15 is a side view of the pull strap of a safety air bag provided by the embodiment of the present application connected on the fixing sheet.

[0040] Figure 16 is a side view of the pull strap of a safety air bag provided by the embodiment of the present application connected on the air bag wall.

[0041] Figure 17 is a side view of the pull strap of a safety air bag provided by the embodiment of the present application connected on the fixing sheet and the closed end of the pull strap fixed on the ferrule.

[0042] Figure 18 is a side view of the pull strap of a safety air bag provided by the embodiment of the present application connected on the fixing sheet and the closed end of the pull strap fixed on the air bag wall.

[0043] 10: airbag body; 101: deflation port; 102: pull strap hole; 103: fixing piece; 20: pull strap reactor; 201: winding mechanism; 30: pull strap; 40: gas generator; 50: collar; 60: connecting strap. DETAILED DESCRIPTION

[0044] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details set forth in this description. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to unnecessarily obscure aspects of the present application.

[0045] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", and the like refer to the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0046] In the related art, when an accident occurs in a car, a gas generator inflates and deploys a safety airbag to protect the safety of the passenger, but due to the too great pressure of the deployed airbag body, if the passenger's body weight is small or the sitting posture is not correct, the deployed airbag body is very easy to hit the passenger and cause injury to the passenger, that is, a more common injury is that the airbag wall of the safety airbag is tightly pressed against the mouth and nose of the passenger, which can hinder the normal breathing of the passenger, and further cause secondary injury to the passenger.

[0047] Therefore, the present application provides a safety airbag, which comprises an airbag body, a pull strap reactor and a pull strap; a deflation port is arranged on the airbag wall of the airbag body, one side of the deflation port is provided with a pull strap hole, the pull strap is inserted into the pull strap hole, the pull strap is used to close the deflation port when it is tightened, and the pull strap is connected to the pull strap reactor; when the pull strap reactor is in a tightened state, the pull strap reactor closes the deflation port by tightening the pull strap; when the pull strap reactor is in a released state, the pull strap reactor loosens the pull strap, so that the pull strap is blown open under the impact of the air pressure in the airbag body cavity, thereby opening the deflation port.

[0048] It can be understood that the airbag provided by the application inflates and expands when the automobile has an accident, the pull belt reactor is in a tension state, the pull belt reactor closes the gas exhaust port by tensioning the pull belt, so as to avoid the gas in the inner cavity of the airbag body from leaking from the gas exhaust port. When the airbag completes inflation, the action of the pull belt reactor is controlled to make the pull belt reactor in a release state, at this time, the pull belt reactor loosens the pull belt, and then the gas exhaust port is opened, and a part of the gas can be released from the gas exhaust port, so as to gradually reduce the pressure in the inner cavity of the airbag body. That is, the application can detect the passenger by the detection device, if it is detected that the passenger has a small body weight or an incorrect sitting posture, the pull belt reactor loosens the pull belt to make the gas exhaust port open, and then a part of the gas is released from the gas exhaust port, so as to reduce the air pressure in the inner cavity of the airbag body and slow down the impact of the airbag body on the passenger with a small body weight or an incorrect sitting posture when the airbag body expands, so as to avoid the harm to the passenger with a small body weight or an incorrect sitting posture when the airbag expands.

[0049] Next, the airbag provided by the application will be described in detail in combination with the drawings.

[0050] The application provides an airbag, which comprises an airbag body 10, a pull belt reactor 20 and a pull belt 30.

[0051] Specifically, as shown in FIGS. 1 and 2, the airbag body 10 is a bag-shaped structure surrounded by an airbag wall, which is generally made of nylon or polyester fabric, etc., which has high strength and durability and can withstand the impact force generated in a 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, so as to protect the passenger and avoid injury to the passenger when the automobile has an accident.

[0052] As shown in FIGS. 1 and 2, the airbag body 10 is provided with a gas inlet (not shown), which is responsible for inputting the gas generated by the gas generator 40 into the inner cavity of the airbag body 10. The gas generator 40 can also be directly installed in the inner cavity of the airbag body 10. When the gas generator 40 generates and outputs gas, the gas enters the inner cavity of the airbag body 10 to inflate.

[0053] Among them, the airbag wall of the airbag body 10 is provided with a gas exhaust port 101, one side of the gas exhaust port 101 is provided with a pull belt hole 102, and the pull belt 30 is inserted into the pull belt hole 102.

[0054] As shown in Figure 3-12, a vent 101 is provided on the airbag wall of the airbag body 10. The vent 101 is used to release the gas inside the airbag body 10 when a car accident occurs, which can prevent injury to passengers with smaller weight or improper sitting posture due to excessive air pressure in the airbag body 10.

[0055] In this embodiment, the vent 101 can be circular or elliptical, and other shapes are also possible. It should be noted that the number of vents 101 on the airbag wall of the airbag body 10 can be set according to actual working conditions. In this embodiment, there is no specific limitation on the number of vents 101. In actual operation, regardless of the number of vents 101 on the airbag body 10, the placement of the vents 101 must be reasonable; specifically, the vents 101 should avoid being placed in positions where they would be pressed down by passengers when the airbag is deployed, and should not be blocked by the passenger's body.

[0056] A pull strap hole 102 is provided on one side of the vent 101. Specifically, when the vent 101 is circular, the pull strap hole 102 can be provided along one side of the diameter direction of the circular vent; when the vent 101 is elliptical, the pull strap hole 102 can be provided along one side of the major axis direction of the elliptical vent. When the vent 101 has other shapes, the pull strap hole 102 can be provided along one side of the length direction of the vent 101. Therefore, the shape of the vent 101 can be determined according to the actual working conditions, and the setting direction of the pull strap hole 102 can be determined by the shape of the vent 101. Here, the shape of the vent 101 and the setting direction of the pull strap hole 102 will not be explained in detail.

[0057] Of course, a side panel can also be provided on one side of the vent 101, that is, the side panel is sewn to the airbag wall, and the pull strap hole 102 is provided on the side panel. It can be understood that the pull strap hole 102 can be directly provided on the airbag wall, or it can be provided on the side panel of the airbag wall, and the position of the pull strap hole 102 can be determined according to the specific working conditions.

[0058] Specifically, a pull strap hole 102 is provided on one side of the vent 101. This can be done by providing multiple pull strap holes 102 on one side of the vent 101, or by providing pull strap holes 102 on both sides of the vent 101.

[0059] In one embodiment of this application, as shown in Figures 7-12, a plurality of the pull strap holes 102 may be provided on one side of the vent 101. That is, the plurality of pull strap holes 102 are provided on one side of the vent 101, and the specific side of the vent 101 where the pull strap holes 102 are provided can be determined according to the specific working conditions.

[0060] In another embodiment of this application, as shown in Figures 3-6, the pull strap holes 102 can be provided on both sides of the vent 101. That is, the pull strap holes 102 can be provided on both sides of the vent 101, and the number of pull strap holes 102 provided on both sides of the vent 101 can be determined according to the specific working conditions.

[0061] As shown in Figures 3-6, 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 on both sides of the vent can also be different. That is, the number of pull strap holes 102 on both sides of the vent 101 can be different, and the spacing between adjacent pull strap holes 102 and the distance between the pull strap holes 102 on both sides and the vent 101 can be equal. Alternatively, the number of pull strap holes 102 on both sides of the vent 101 can be the same, and any one of the spacing between adjacent pull strap holes 102 and the distance between the pull strap holes 102 on both sides and the vent 101 can be unequal. Or, the number of pull strap holes 102 on both sides of the vent 101 can be different, and the spacing between adjacent pull strap holes 102 and the distance between the pull strap holes 102 on both sides and the vent 101 can also be unequal. The distribution of the pull strap holes 102 on both sides of the vent 101 can be determined according to the specific actual situation.

[0062] In this embodiment, there is no specific requirement for the number of pull strap holes 102 on both sides of the vent 101, as long as the operational requirements are met. However, it should be noted that the pull strap 30 is inserted into the pull strap holes 102, and there is friction between the pull strap 30 and the pull strap holes 102, which will hinder the movement of the pull strap 30 within the pull strap holes 102. Furthermore, the more pull strap holes 102 there are, the greater the resistance to the pull strap 30. Therefore, the number of pull strap holes 102 should not be excessive. At the same time, if the number of pull strap holes 102 is too small, the closing effect of the pull strap 30 on the vent 101 will be poor. Therefore, the number of pull strap holes 102 on both sides of the vent 101 should be neither too many nor too few. When setting the number of pull strap holes 102, a comprehensive consideration is needed to ensure that the number of pull strap holes 102 minimizes the resistance to the pull strap 30 while still achieving the required closing effect for the vent 101. If the friction between the pull strap hole 102 and the pull strap 30 is too great, a relatively smooth insert ring can be fixed inside the pull strap hole 102. That is, fixing a relatively smooth insert ring inside the pull strap hole 102 can reduce the friction between the pull strap 30 and the pull strap 30.

[0063] Specifically, in this embodiment, three pull strap holes 102 are provided on each of the left and right sides of the vent 101, or two pull strap holes 102 may be provided on each side. The number of pull strap holes 102 can be set according to the specific working conditions.

[0064] The shape of the pull strap hole 102 can be circular or elliptical, but it is not excluded that the pull strap hole 102 can also be other shapes. The pull strap hole 102 is for inserting the pull strap 30 into the pull strap hole 102. Therefore, the size of the pull strap hole 102 is only required to allow the pull strap 30 to be inserted into the pull strap hole 102.

[0065] The pull strap 30 is used to close the vent 101 when tightened. Specifically, as shown in Figures 3, 5, and 7, the pull strap hole 102 provides an insertion path for the pull strap 30. The pull strap 30 can be inserted along 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 then pulling the pull strap 30, the vent 101 is closed, thereby preventing gas leakage from the airbag body 10. In this embodiment, the pull strap 30 can be a flexible pull cord, but it is not excluded that the pull strap 30 can also be other structures, such as an elastic pull strap.

[0066] As shown in Figures 3-6 and 17-18, the pull belt 30 is connected to the pull belt reactor 20. Specifically, the pull belt reactor 20 is used to control the pull belt 30. By tightening or loosening the pull belt 30, the vent 101 is placed in different states. For example, when the pull belt reactor 20 tightens the pull belt 30, the vent 101 is in a closed state; when the pull belt reactor 20 loosens the pull belt 30, the vent 101 is in an open state.

[0067] When the gas generator 40 receives a detonation signal but the pull-belt reactor 20 does not receive a response signal, the gas generator 40 reacts, and gas rushes out from the gas generator 40 and fills the airbag body 10. Because the pull-belt reactor 20 does not respond, the pull-belts 30 on both sides of the vent 101 remain fixed at both ends. As the airbag body 10 gradually fills, the ends of the pull-belts 30 will gradually tighten, thereby tightening the vent 101 and closing it.

[0068] There are many ways to set up the belt reactor 20, which will not be listed one by one here. In this embodiment, only a few setting methods are illustrated.

[0069] The pull-belt reactor 20 is provided with a retractable winding structure 201, and the pull-belt 30 is wound around the winding structure 201. When the pull-belt reactor 20 is in a tensioned state, the winding structure 201 is locked and cannot be retracted. When the pull-belt reactor 20 is in a released state, the winding structure 201 is unlocked and can be retracted.

[0070] Specifically, as shown in Figures 3-6 and 17-18, a retractable winding structure 201 is provided on the belt-pulling reactor 20. The winding structure 201 can be a retractable cylindrical structure, that is, the belt-pulling device 30 is wound around the fixed end of the belt-pulling reactor 20 through the cylindrical winding structure 201. When the belt-pulling reactor 20 is in a taut state, the winding structure 201 is locked, that is, the winding structure 201 cannot be retracted. At this time, the belt-pulling reactor 20 tightens the belt-pulling device 30 on it, thereby closing the vent 101 and preventing gas from leaking from the vent 101. When the pull-belt reactor 20 is in the released state, the pull-belt reactor 20 is activated, that is, the winding structure 201 is unlocked. At this time, the winding structure 201 can retract, causing the pull-belt 30 fixed on the pull-belt reactor 20 to fall off the pull-belt reactor 20. That is, the pull-belt 30 is blown open under the air pressure inside the airbag body 10, and the vent 101 is in the open state, so that a part of the gas in the airbag body 10 is released, preventing the air pressure inside the airbag body from being too high and causing injury to passengers with small weight or poor sitting posture.

[0071] The aforementioned belt-pulling reactor 20 can be implemented using various methods provided by existing technology. For example, it can be implemented using an electromagnetic brake pad. When the belt-pulling reactor 20 is in a tensioned state, the electromagnetic coil is energized, and the electromagnetic brake pad is engaged. The winding mechanism 201 cannot retract due to the action of the brake pad. When the belt-pulling reactor 20 is in a released state, the electromagnetic brake pad is de-energized and released. The winding mechanism 201 can retract because the brake pad is inactive.

[0072] The belt-pulling reactor 20 can also be configured in another way, wherein a shearing structure is provided on the belt-pulling reactor 20, and the belt 30 is fixed to the belt-pulling reactor 20 through the shearing structure; when the belt-pulling reactor 20 is in a tensioned state, the shearing structure does not perform a shearing action; when the belt-pulling reactor 20 is in a released state, the shearing structure performs a shearing action and cuts the belt 30, causing the belt 30 to loosen.

[0073] Specifically, a shearing structure is provided on the belt-pulling reactor 20 to fix the belt-pulling reactor 20, that is, to the fixed end of the belt-pulling reactor 20. When the belt-pulling reactor 20 is in a tensioned state, the shearing structure does not perform a shearing action, that is, the shearing structure does not cut the belt-pulling reactor 20, and the belt-pulling reactor 20 is still fixed to the fixed end of the belt-pulling reactor 20. At this time, the belt-pulling reactor 20 tightens the belt, thereby closing the vent 101 and preventing gas from leaking from the vent 101. When the pull-belt reactor 20 is in the released state, that is, the shearing structure performs a shearing action, at which time the shearing structure cuts the pull-belt 30 fixed on the pull-belt reactor 20, causing the pull-belt 30 fixed on the pull-belt reactor 20 to detach from the pull-belt reactor. That is, the pull-belt 30 is blown open under the air pressure in the inner cavity of the airbag body, and the vent 101 is in the open state, so that a part of the gas in the inner cavity of the airbag body 10 is released, preventing the air pressure in the inner cavity of the airbag body 10 from causing injury to passengers with small weight or poor sitting posture.

[0074] The above-mentioned shearing structure can be implemented in different ways. For example, the pull strap 30 passes through a shearing opening, one end of which is set on a telescopic rod. When the telescopic rod retracts under the action of electromagnetic force, the blades opposite to the shearing opening shrink and overlap, cutting the pull strap passing through this opening, thus performing the shearing action.

[0075] The pull strap 30 extends from the pull strap hole 102 into the inner cavity of the airbag body 10 and is connected to the pull strap reactor 20.

[0076] Specifically, the pull strap reactor 20 is disposed within the inner cavity of the airbag body 10, and the pull strap 30 passes through the pull strap hole 102 and extends into the inner cavity of the airbag body 10, fixing the pull strap 30 to the fixed end of the pull strap reactor 20. However, in this embodiment, it is not excluded that the pull strap reactor 20 can be disposed in other positions of the airbag, simply by fixing the pull strap 30 to the pull strap reactor 20, and the pull strap 30 can be tightened or loosened through the pull strap reactor 20.

[0077] The pull strap 30 can be fixed to the airbag wall of the airbag body 10 or to the pull strap reactor 20. The fixing method of the pull strap 30 can be set according to the working requirements. The fixing method of the pull strap 30 will be described in detail below.

[0078] In the first method, when the air vent 101 is provided with the pull strap holes 102 on both sides, one end of the pull strap 30 is fixed to the airbag wall of the airbag body 10, and the other end is inserted back and forth through each of the pull strap holes 102 and extends out to connect to the pull strap reactor 20.

[0079] Specifically, as shown in Figures 3 and 4, one end of the pull strap 30 is fixed to the airbag wall of the airbag body 10. That is, one end of the pull strap 30 can be sewn onto the outer wall of the airbag body 10 or onto the inner wall of the airbag body 10. After sewing one end of the pull strap 30 to the airbag wall of the airbag body 10, the other end of the pull strap 30 is repeatedly inserted through the pull strap holes 102 on both sides of the vent 101. That is, after the other end of the pull strap 30 passes through the pull strap holes 102 and exits from the last pull strap hole 102, it is fixed to the fixed end of the pull strap reactor 20, i.e., the other end of the pull strap 30 is fixed to the winding mechanism 201.

[0080] In the second method, when the vent 101 is provided with the pull strap holes 102 on both sides, after the pull strap 30 is inserted through the pull strap holes 102, the two ends of the pull strap 30 are fixed on the pull strap reactor 20.

[0081] Specifically, as shown in Figures 5 and 6, one end of the pull strap 30 is fixed to the pull strap reactor 20, that is, one end of the pull strap 30 is fixed to the fixed end of the pull strap reactor 20. The other end of the pull strap 30 is inserted through the pull strap holes 102, that is, after the other end of the pull strap 30 passes through the pull strap holes 102 on both sides of the vent 101, it exits from the last pull strap hole 102 and is fixed to the fixed end of the pull strap reactor 20. Both ends of the pull strap 30 can be fixed to the fixed end of the pull strap reactor 20 respectively, or the two ends of the pull strap 30 can be connected together to the fixed end of the pull strap reactor 20. That is, the two ends of the pull strap 30 are first connected together, and then fixed to the fixed end of the pull strap reactor 20. Both ends of the pull strap are fixed to the winding mechanism 201.

[0082] In the third method, a plurality of the pull strap holes 102 are provided on one side of the vent 101. After the pull strap 30 is inserted through the pull strap holes 102, both ends of the pull strap 30 are fixed to the airbag wall of the airbag body 10. The closed end of the pull strap 30 extending out of the pull strap hole 102 is connected to the pull strap reactor.

[0083] Specifically, as shown in Figures 7-12, after both ends of the pull strap 30 are inserted through the pull strap hole 102 on one side of the vent 101, as shown in Figure 14, the two ends of the pull strap 30 are respectively sewn onto the airbag wall of the airbag body 10. That is, the two ends of the pull strap 30 can be sewn onto the outer wall of the airbag body 10, or they can be sewn onto the inner wall of the airbag body 10. Figures 9 and 11 show the two ends of the pull strap sewn onto the inner wall of the airbag, and Figures 10 and 12 show the two ends of the pull strap sewn onto the outer wall of the airbag. When the two ends of the pull strap 30 are respectively sewn onto the airbag wall of the airbag body 10, the closed end of the pull strap 30 extending from the pull strap hole 102 is connected to the pull strap reactor. It can be understood that when the two ends of the pull strap 30 as shown in Figure 18 are respectively sewn onto the airbag wall of the airbag body 10, the pull strap 30 forms a closed loop structure, and the closed end of the pull strap 30 can extend out from the pull strap hole 102 and be fixed on the fixed end of the pull strap reactor, that is, the closed end of the pull strap is fixed on the winding mechanism 201.

[0084] In another embodiment of this application, a fixing piece 103 is fixed on the airbag wall of the airbag body 10, and after the pull strap 30 is inserted along the pull strap hole 102, both ends of the pull strap 30 are respectively fixed on the fixing piece 103.

[0085] As shown in Figures 9-10, 13, 15, and 17-18, the two ends of the pull strap 30 are not directly sewn to the airbag wall of the airbag body 10. After the pull strap 30 is inserted along the pull strap hole 102, the two ends of the pull strap 30 are sewn to the fixing piece 103. The fixing piece 103 is sewn to the airbag wall of the airbag body 10. That is, the fixing piece 103 can be sewn to the inner wall of the airbag wall or the outer wall of the airbag wall, depending on the specific working requirements. In other words, the fixing piece 103 is sewn onto the airbag wall of the airbag body 10, and after the two ends of the pull strap 30 are inserted along the pull strap hole 102 on one side of the vent 101, the two ends of the pull strap 30 are respectively fixed to the fixing piece 103.

[0086] It should also be noted that there is a certain safe distance between the fixing plate 103 and the vent 101. The safe distance can be determined according to specific process requirements, industry standards, etc. Here, no specific restrictions are imposed, as long as the working requirements are met.

[0087] The fixing plate 103 is provided on the airbag wall. After the two ends of the pull strap 30 are inserted through the pull strap hole 102 on one side of the vent 101, the two ends of the pull strap 30 are fixed on the fixing plate 103. When the pull strap reactor 20 is in a taut state, the fixing plate 103 can be subjected to force as a whole when the pull strap 30 is taut, that is, the fixing plate 103 is subjected to force evenly. Moreover, when the pull strap 30 is taut, the fixing plate 103 can also cover part of the vent 101 to prevent gas from leaking from the vent 101.

[0088] A collar 50 is fixedly sleeved on the outer periphery of the closed end of the pull belt 30 extending from the pull belt hole 102, and the collar 50 is connected to the pull belt reactor 20 by a connecting belt 60.

[0089] Specifically, as shown in Figures 9-12 and 15-17, after the closed end of the pull strap 30 extends out of the pull strap hole 102, a collar 50 is fixedly sleeved on the outer periphery of the closed end of the pull strap 30. That is, the closed end of the pull strap 30 is sewn into the collar 50. Then, the collar 50 is connected to the pull strap reactor 20 by the connecting strap 60. In other words, the closed end of the pull strap 20 is connected to the pull strap reactor 20 by the collar 50 and the connecting strap 60.

[0090] When the pull belt 30 consists of multiple sets of pull belts, the closed ends of the multiple sets of pull belts 30 are also multiple sets. The closed ends of the multiple sets of pull belts 30 can be sewn into the collar 50 and connected to the pull belt reactor 20 through the collar 50 and the connecting belt 60 fixed on the collar. This can avoid the influence caused by the multiple sets of pull belts 30 having different lengths. Moreover, by fixing the connecting belt 30 to the pull belt reactor 20, the number of pull belts directly connected to the pull belt reactor 20 can be reduced.

[0091] The above are three ways to fix the pull strap. The method of fixing the pull strap 30 can be selected according to the specific working conditions. However, it is not to say that there are only three ways to fix the pull strap 30. This application embodiment does not exhaustively list all the methods of fixing the pull strap 30. It can be understood that as long as the vent 101 can be closed or opened by the pull strap 30, the fixing methods of the pull strap 30 involved are all within the protection scope of this application embodiment.

[0092] The pull strap 30 includes multiple sets of pull straps, with adjacent sets of pull straps 30 crossing each other and then inserted into the corresponding pull strap holes 102; or, each set of pull straps 30 is inserted into its respective corresponding pull strap hole 102.

[0093] Specifically, when multiple pull strap holes 102 are provided on one side of the vent 101, the pull strap can be one set of pull straps or multiple sets of pull straps, such as two sets of pull straps, four sets of pull straps, etc. The number of pull strap sets can be selected according to the specific working conditions.

[0094] When the pull strap consists of two sets of pull straps 30, the two sets of pull straps 30 can have different insertion methods, as shown in Figures 9-10. Adjacent sets of pull straps 30 can cross each other before being inserted into their corresponding pull strap holes 102. In other words, adjacent sets of pull straps 30 can cross each other. Alternatively, as shown in Figures 11-12, the two sets of pull straps 30 can also be inserted into their respective pull strap holes 102 without crossing each other. That is, each set of pull straps 30 does not affect the others, and each set of pull straps 30 is inserted into its own corresponding pull strap hole 102.

[0095] The above describes different methods by which the two sets of pull straps 30 are inserted into the pull strap holes 102 when multiple pull strap holes 102 are provided on one side of the vent. Of course, in addition to the above-described insertion methods, there are other different insertion methods for the two sets of pull straps 30, which will not be listed here.

[0096] When the pull strap 30 is a different number of multiple sets of pull straps 30, they can be interlaced in the same way as the two sets of pull straps 30 described above. The appropriate number of pull straps 30 and the interlacing method of the pull straps can be selected according to the specific working conditions.

[0097] Wherein, when the vent 101 is provided with a plurality of pull strap holes 102 along the circumferential direction on both sides; the pull strap 30 crosses and reciprocates along each pull strap hole 102 in the vent 101; or, the pull strap 30 crosses and reciprocates along each pull strap hole 102 in parallel up and down on both sides of the vent 101.

[0098] Specifically, as shown in Figures 3-6, multiple circumferentially oriented pull strap holes 102 are respectively provided on both sides of the vent 101. That is, 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 from the vent 101 can all be equal, or all unequal, or some can be equal and the rest unequal. The specific settings can be determined according to the specific working conditions. In this embodiment, the pull strap 30 is inserted back and forth along the pull strap holes 102 on both sides of the vent 101. The pull strap 30 can be inserted and crisscrossed along each pull strap hole 102 on both sides of the vent 101. This insertion method is similar to the insertion method of running shoe laces. The crisscrossing insertion method of the pull strap 30 can better close the vent 101 and prevent the gas in the airbag body 10 from leaking from the vent 101 when the pull strap reactor 20 is in a taut state.

[0099] The pull strap 30 can also be inserted back and forth parallel to each other on both sides of the vent 101 along the pull strap hole 101. This insertion method can better open the vent 101. When the pull strap reactor is in the released state, the pull strap reactor releases the pull strap 30. The pull strap 30 in the pull strap hole 101 on both sides of the vent 101 is blown open by the air pressure impact in the inner cavity of the airbag body 10, thereby opening the vent 101. This allows the gas in the airbag body 10 to be released from the vent 101, avoiding injury to passengers with smaller weight or incorrect sitting posture due to excessive air pressure in the inner cavity of the airbag body 10.

[0100] Specifically, the tension and release states of the belt reactor 20 can be switched by electronic control. Furthermore, the belt reactor 20 can be used in conjunction with a detection device, so that when the detection device detects that the passenger's weight is too light or the sitting posture is incorrect, the belt reactor 20 is controlled to be in the release state, and when the detection device detects that the passenger's weight is normal or the sitting posture is normal, the belt reactor 20 is controlled to be in the tension state.

[0101] The detection device may include sensors, a posture recognition system, etc. When the detection device includes sensors, the sensors can determine that the passenger is underweight when their weight is less than a preset value, and determine that the passenger's weight is normal when their weight is not less than the preset value. When the detection device includes a posture recognition system, the posture recognition system can determine that the passenger has normal posture when their weight is within a preset sitting posture area, and determine that the passenger has incorrect posture when their weight is outside the preset sitting posture area. Of course, any other feasible method can be used to determine the passenger's weight and posture, and this is not limited here.

[0102] When the pull belt reactor 20 is in the tensioned state, the pull belt reactor 20 closes the vent 101 by tightening the pull belt 30; when the pull belt reactor 20 is in the release state, the pull belt reactor 20 releases the pull belt 30, causing the pull belt 30 to be blown open under the air pressure impact of the airbag body, thereby opening the vent 101.

[0103] Specifically, when the detection device detects that a passenger is underweight or has an incorrect posture, the pull strap reactor 20 is in a released state. This means that the air pressure inside the airbag is too high, which could potentially harm a passenger who is underweight or has an incorrect posture. Therefore, some of the gas inside the airbag needs to be released. In other words, the pull strap reactor 20 responds, and the pull strap 30 detaches from it. Simultaneously, the tension applied by the pull strap 30 to the vent 101 is released. Therefore, under the impact of the air pressure inside the airbag, the vent 101 breaks free from the pull strap's restraint and opens, forming a normally open opening, thereby relieving the pressure inside the airbag.

[0104] When the detection device detects that the passenger's weight or sitting posture is normal, the pull belt reactor 20 is in a taut state. That is, at this time, the pull belt reactor 20 closes the vent 101 by tightening the pull belt 30, so as to prevent the gas in the inner cavity of the airbag body 10 from leaking out of the vent 101.

[0105] The above describes a safety airbag provided in this application. The airbag includes an airbag body 10, a strap reactor 20, and a strap 30. The airbag body 10 has a vent 101 on its airbag wall, and a strap hole 102 on one side of the vent 101. The strap 30 is inserted into each of the strap holes 102 and is used to close the vent 101 when tightened. The strap 30 is connected to the strap reactor 20. When the strap reactor 20 is in a tightened state, it closes the vent 101 by tightening the strap 30. When the strap reactor 20 is in a released state, it releases the strap 30, causing the strap 30 to be blown open by the air pressure impact within the airbag body, thereby opening the vent 101. This application utilizes the pull strap hole 102 provided on one side of the vent 101. By tightening or loosening the pull strap 30 within the pull strap hole 102, the vent 101 is closed when the pull strap reactor 20 is in a tightened state, preventing gas leakage from the internal cavity of the airbag. When the pull strap reactor is in a released state, the vent 101 is open, allowing some of the gas in the internal cavity of the airbag to be released, preventing injury to passengers with smaller weight or incorrect sitting posture due to excessive air pressure in the internal cavity of the airbag.

[0106] This application also provides a vehicle that includes the aforementioned airbag, as detailed below.

[0107] This application provides a car, wherein the car's airbag includes: an airbag body, a strap reactor, and a strap;

[0108] The airbag body has an air vent on its airbag wall and a pull strap hole on one side of the air vent. The pull strap is inserted into each of the pull strap holes and is used to close the air vent when tightened. The pull strap is connected to the pull strap reactor.

[0109] When the belt reactor is in the tensioned state, it closes the vent by tightening the belt; when the belt reactor is in the release state, it releases the belt, causing the belt to be blown open by the air pressure impact inside the airbag body, thereby opening the vent.

[0110] 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 first embodiment above, which will not be repeated here.

[0111] 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.

[0112] 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.

[0113] 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 by, The safety airbag comprises an airbag body, a pull belt reactor and a pull belt. The airbag wall of the airbag body is provided with a deflation port, one side of the deflation port is provided with a pull belt hole, the pull belt is inserted into the pull belt hole, the pull belt is used to close the deflation port when being pulled tight, and the pull belt is connected to the pull belt reactor. When the pull belt reactor is in a pulled tight state, the pull belt reactor closes the deflation port by pulling the pull belt tight; when the pull belt reactor is in a released state, the pull belt reactor loosens the pull belt, so that the pull belt is blown open under the impact of the air pressure in the airbag body cavity, thereby opening the deflation port.

2. The airbag of claim 1, wherein One side of the deflation port is provided with a plurality of pull belt holes. Or, both sides of the deflation port are respectively provided with the pull belt holes.

3. The airbag of claim 2, wherein When both sides of the deflation port are respectively provided with the pull belt holes, one end of the pull belt is fixed to the airbag wall of the airbag body, and the other end of the pull belt is inserted back and forth into each of the pull belt holes and extends out to be connected to the pull belt reactor.

4. The airbag of claim 1, wherein After the pull belt is inserted along the pull belt hole, both ends of the pull belt are fixed to the pull belt reactor.

5. The airbag of claim 2, wherein One side of the deflation port is provided with a plurality of pull belt holes, after the pull belt is inserted along the pull belt hole, both ends of the pull belt are respectively fixed to the airbag wall of the airbag body, and the closed end of the pull belt extending out of the pull belt hole is connected to the pull belt reactor.

6. The airbag of claim 5, wherein The airbag wall of the airbag body is fixed with a fixed sheet, after the pull belt is inserted along the pull belt hole, both ends of the pull belt are respectively fixed to the fixed sheet.

7. The airbag of claim 5, wherein The closed end of the pull belt extending out of the pull belt hole is peripherally fixed with a sleeve ring, and the sleeve ring is connected to the pull belt reactor through a connecting belt.

8. The airbag of claim 5, wherein The pull belt comprises a plurality of groups of pull belts, and adjacent groups of pull belts in the plurality of groups of pull belts are inserted into corresponding pull belt holes after being crossed. Or, each group of pull belts in the plurality of groups of pull belts is inserted into a corresponding pull belt hole.

9. The airbag of claim 2, wherein Both sides of the deflation port are respectively provided with the pull belt holes, and the pull belt is inserted back and forth along each of the pull belt holes on both sides of the deflation port. Or, the pull belt is inserted back and forth along each of the pull belt holes in parallel on both sides of the deflation port.

10. An automobile characterized by comprising: The safety airbag comprises an airbag body, a pull belt reactor and a pull belt. The safety airbag comprises an airbag body, a pull belt reactor and a pull belt.

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