Airbag and vehicle

Abstract

An airbag and a vehicle. The airbag comprises an airbag body (10), a tether reactor (20), and tethers (30), wherein a vent port (101) is provided in the airbag wall of the airbag body (10); tether holes (102) are provided on two sides of the vent port (101), the tethers (30) pass back and forth through the tether holes (102), the tethers (30) are configured to close the vent port (101) when tensioned, and the tethers (30) are connected to the tether reactor (20); when the tether reactor (20) is in a tensioned state, the tether reactor (20) closes the vent port (101) by means of tensioning the tethers (30); and when the tether reactor (20) is in a released state, the tether reactor (20) releases the tethers (30), such that the tethers (30) are blown open under the impact of the air pressure in an inner cavity of the airbag body (10), thereby opening the vent port (101). The vent port (101) is opened or closed by means of loosening or tensioning the tethers (30), such that the inflation of the airbag is ensured, and passengers with lower body weights or in improper seating postures are also prevented from being injured when the airbag is deployed.

Description

Airbag and automobile

[0001] The present application claims priority to the Chinese patent application No. 2024107901074, filed on June 18, 2024, and entitled "Airbag and automobile", the content of which is incorporated herein by reference in its 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 gas generated by the gas generator rushes to and fills the airbag, so that the airbag inflates and expands 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, there is a need for an airbag that can avoid injuries to passengers with a small body weight or an improper sitting posture when the airbag is initially expanded.

[0006] SUMMARY

[0007] The present application provides an airbag to solve the technical problem of how to avoid injuries to passengers 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-mentioned airbag.

[0008] The present application provides an airbag, which comprises an airbag body, a pull belt reactor and a pull belt. A gas leakage port is arranged on the airbag wall of the airbag body, pull belt holes are arranged on both sides of the gas leakage port, the pull belt is inserted back and forth in each pull belt hole, the pull belt is used to close the gas leakage port when it is tightened, and the pull belt is connected to the pull belt reactor. When the pull belt reactor is in a tightened state, the pull belt reactor closes the gas leakage port by tightening the pull belt. 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 gas leakage port.

[0009] Optionally, one end of the pull belt is fixed to the airbag wall of the airbag body, and the other end is inserted back and forth in each pull belt hole and extends to be connected to the pull belt reactor.

[0010] Optionally, after the pull tape is inserted through the pull tape holes, the two ends of the pull tape are fixed on the pull tape reactor.

[0011] Optionally, after the pull tape is inserted through the pull tape holes, the two ends of the pull tape are fixed on the airbag wall of the airbag body respectively, and the closed end of the pull tape extending out of the pull tape hole is connected with the pull tape reactor.

[0012] Optionally, the two sides of the air release port are respectively provided with a plurality of pull tape holes in the circumferential direction.

[0013] The pull tape is inserted through the pull tape holes on the two sides of the air release port in an up-and-down crossing manner.

[0014] Or, the pull tape is inserted through the pull tape holes on the two sides of the air release port in an up-and-down parallel manner.

[0015] Optionally, the distribution of the pull tape holes on the two sides of the air release port is the same.

[0016] Optionally, the pull tape reactor is provided with a retractable winding structure, and the pull tape is wound on the winding structure; when the pull tape reactor is in a tension state, the winding structure is locked and cannot be retracted, and when the pull tape reactor is in a release state, the winding structure is unlocked and can be retracted.

[0017] Optionally, the pull tape reactor is provided with a shearing structure, and the pull tape is fixed on the pull tape reactor through the shearing structure; when the pull tape reactor is in a tension state, the shearing structure does not perform a shearing action; when the pull tape reactor is in a release state, the shearing structure performs a shearing action and cuts the pull tape, so that the pull tape is loosened.

[0018] Optionally, the pull tape extends into the airbag body lumen from the pull tape hole and is connected to the pull tape reactor.

[0019] The application also provides an automobile, which comprises the airbag of any one of the above.

[0020] Compared with the prior art, the application has the following advantages:

[0021] The application provides a safety air bag, which comprises an air bag body, a pull belt reactor and a pull belt.

[0022] 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 incorrect 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, 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 incorrect 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

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] Fig. 5 is a schematic diagram of the state of the pull tape reactor and the pull tape when the two ends of the pull tape of the airbag provided by the embodiment of the present application are fixed on the pull tape reactor and the pull tape reactor is in a tension state.

[0028] Fig. 6 is a schematic diagram of the state of the pull tape reactor and the pull tape when the two ends of the pull tape of the airbag provided by the embodiment of the present application are fixed on the pull tape reactor and the pull tape reactor is in a release state.

[0029] Fig. 7 is a schematic diagram of the structure of the pull tape when the two ends of the pull tape of the airbag provided by the embodiment of the present application are fixed on the airbag wall of the airbag body and the pull tape reactor is in a tension state.

[0030] Fig. 8 is a schematic diagram of the structure of the pull tape when the two ends of the pull tape of the airbag provided by the embodiment of the present application are fixed on the airbag wall of the airbag body and the pull tape reactor is in a release state.

[0031] Reference signs:

[0032] 10: airbag body; 101: air outlet; 102: pull tape hole;

[0033] 20: pull tape reactor; 201: winding mechanism;

[0034] 30: pull tape;

[0035] 40: gas generator. DETAILED DESCRIPTION

[0036] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application. However, the present application can be practiced in a large number of other ways not described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the present application, and therefore the present application is not limited to the specific implementations disclosed below.

[0037] In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0038] In the related art, when an automobile accident occurs, the gas generator inflates and deploys the airbag to protect the safety of the passenger, but because the pressure of the deployed airbag is too large, if the passenger has a small body weight or an improper sitting posture, the deployed airbag body is very easy to hit the passenger and cause injury, that is, a more common injury is that the airbag wall of the airbag is tightly pressed against the mouth and nose of the passenger, which will hinder the normal breathing of the passenger and cause secondary injury to the passenger.

[0039] According to the airbag provided by the application, when the airbag inflates and expands in the event of an automobile accident, the pull belt reactor is in the tension state, the pull belt reactor closes the air release port by tensioning the pull belt, so as to avoid the leakage of the gas in the inner cavity of the airbag body from the air release port. When the airbag completes the inflation, the pull belt reactor is controlled to be in the release state, at this time, the pull belt reactor loosens the pull belt, and then the air release port is opened, the gas is released from the air release port, and the pressure in the inner cavity of the airbag body can be gradually reduced. If the passenger has a small body weight or an improper sitting posture, the pull belt reactor is controlled to loosen the pull belt, the air release port is opened, and then the gas can be released from the air release port, so that the air pressure in the inner cavity of the airbag body is reduced, the impact of the airbag body on the passenger when the airbag body expands is alleviated, and the passenger with a small body weight or an improper sitting posture is prevented from being injured when the airbag expands.

[0040] According to the airbag provided by the application, when the airbag inflates and expands in the event of an automobile accident, the pull belt reactor is in the tension state, the pull belt reactor closes the air release port by tensioning the pull belt, so as to avoid the leakage of the gas in the inner cavity of the airbag body from the air release port. When the airbag completes the inflation, the pull belt reactor is controlled to be in the release state, at this time, the pull belt reactor loosens the pull belt, and then the air release port is opened, the gas is released from the air release port, and the pressure in the inner cavity of the airbag body can be gradually reduced. If the passenger has a small body weight or an improper sitting posture, the pull belt reactor is controlled to loosen the pull belt, the air release port is opened, and then the gas can be released from the air release port, so that the air pressure in the inner cavity of the airbag body is reduced, the impact of the airbag body on the passenger when the airbag body expands is alleviated, and the passenger with a small body weight or an improper sitting posture is prevented from being injured when the airbag expands.

[0041] Next, the airbag provided by the application will be described in detail in combination with the accompanying drawings.

[0042] The airbag provided by the application comprises an airbag body 10, a pull belt reactor 20 and a pull belt 30.

[0043] Specifically, as shown in FIG. 1 and FIG. 2, the airbag body 10 is a bag-shaped structure surrounded by an airbag wall, and the airbag wall is generally made of nylon or polyester fiber fabric and the like, which has high strength and durability and can withstand the impact force generated in the collision. After the inner cavity of the airbag body 10 inflates, the airbag body 10 will expand under the action of the air pressure, forming a buffer structure for lifting the human body, so as to protect the passenger and avoid the passenger being injured in the event of an automobile accident.

[0044] As shown in FIG. 1 and FIG. 2, the airbag body 10 is provided with an air inlet, 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 the gas, the gas enters the inner cavity of the airbag body 10 to inflate.

[0045] The airbag body 10 is provided with an air outlet 101 on the airbag wall, and the air outlet 101 is provided with a pull belt hole 102 on both sides. The pull belt 30 is inserted into each pull belt hole 102.

[0046] It can be understood that the airbag body 10 is provided with an air outlet 101 on the airbag wall. The air outlet 101 is used to release the gas in the airbag body 10 cavity when the car has an accident, so as to avoid injury to passengers with small body weight or improper sitting posture due to excessive air pressure in the airbag body 10.

[0047] In the embodiment of the application, the air outlet 101 can be circular or elliptical, and of course other shapes are not excluded.

[0048] The air outlet 101 is provided with a pull belt hole 102 on both sides. Specifically, when the air outlet 101 is circular, the pull belt hole 102 can be provided on both sides of the straight direction of the circular air outlet. When the air outlet 101 is elliptical, the pull belt hole 102 can be provided on both sides of the long axis direction of the elliptical air outlet. When the air outlet 101 is of other shapes, the pull belt hole 102 can be provided on both sides of the length direction of the air outlet 101. Therefore, the shape of the air outlet 101 can be determined according to the actual working condition, and the setting direction of the pull belt hole 102 is determined by the shape of the air outlet 101. Here, the shape of the air outlet 101 and the setting direction of the pull belt hole 102 are not described in detail.

[0049] It should be noted that the number of air outlets 101 provided on the airbag wall of the airbag body 10 can be set according to the actual working condition. In the embodiment of the application, the number of air outlets 101 is not specifically limited. In actual work, no matter how many air outlets 101 are provided on the airbag body 10, it needs to be noted that the setting position of the air outlet 101 must be reasonable. Specifically, the air outlet 101 should be avoided to be set at a position that will be pressed by the passenger during the operation of the safety airbag, so as to avoid that the air outlet 101 itself is blocked by the passenger's body.

[0050] The distribution of the pull strap holes 102 on both sides of the air release port 101 is the same. It can be understood that the number of the pull strap holes 102 on both sides of the air release port 101, the spacing between adjacent pull strap holes 102, and the distance between the pull strap holes 102 on both sides and the air release port 101 are all equal. Of course, the distribution of the pull strap holes on both sides of the air release port can also be different, that is, the number of the pull strap holes 102 on both sides of the air release port 101 is different, the spacing between adjacent pull strap holes 102, and the distance between the pull strap holes 102 on both sides and the air release port 101 can be equal; or the number of the pull strap holes 102 on both sides of the air release port 101 is the same, 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 air release port 101 can be unequal; or the number of the pull strap holes 102 on both sides of the air release port 101 is different, and the spacing between adjacent pull strap holes 102 and the distance between the pull strap holes 102 on both sides and the air release port 101 are also unequal. The distribution of the pull strap holes 102 on both sides of the air release port 101 can be determined according to the actual situation.

[0051] In the embodiment of the present application, there is no specific requirement for the number of the pull strap holes 102 on both sides of the air release port 101, as long as the working requirements are met. However, it should be noted that the pull strap 30 is inserted into the pull strap hole 102, and there is friction between the pull strap 30 and the pull strap hole 102, which will hinder the movement of the pull strap 30 in the pull strap hole 102. Moreover, the more the pull strap holes 102, the greater the hindrance to the pull strap 30. Therefore, the pull strap holes 102 should not be too many. However, if the pull strap holes 102 are too few, the pull strap 30 will not be able to effectively close the air release port 101. Therefore, the number of the pull strap holes 102 on both sides of the air release port 101 should not be too many or too few. When setting the number of the pull strap holes 102, the number of the pull strap holes 102 should be determined in consideration of the hindrance to the pull strap 30 and the closing effect of the air release port 101. In this case, if the friction of the pull strap hole 102 on the pull strap 30 is too large, a relatively smooth inlaid ring can be fixed in the pull strap hole 102 to reduce the friction on the pull strap 30.

[0052] Specifically, in the embodiment of the present application, three pull strap holes 102 are arranged on both sides of the air release port 101, or two pull strap holes 102 are arranged on both sides of the air release port 101. The number of the pull strap holes 102 can be set according to the actual working conditions.

[0053] The shape of the pull strap hole 102 can be circular or oval, but it is not excluded that the pull strap hole 102 can also be other shapes. The pull strap hole 102 is used to insert the pull strap 30 into the pull strap hole 102, so the size of the pull strap hole 102 can only be able to insert the pull strap 30 into the pull strap hole 102.

[0054] The pull strap 30 is used to close the air vent 101 when tensioned. Specifically, as shown in FIGS. 3, 5 and 8, the pull strap hole 102 provides a path for the pull strap 30 to be inserted, and the pull strap 30 can be inserted back and forth along the pull strap hole 102 provided on both sides of the air vent 101. By inserting the pull strap 30 into the pull strap hole 102, the air vent 101 can be closed by pulling the pull strap 30, so as to avoid gas leakage in the air bag body 10. In the embodiment of the application, the pull strap 30 can be a flexible pull rope, but it is not excluded that the pull strap 30 can also be other structures, such as an elastic pull strap.

[0055] The pull strap 30 is connected to the pull strap reactor 20. Specifically, the pull strap reactor 20 is used to control the pull strap 30, and the pull strap 30 can be tensioned or loosened by the pull strap reactor 20, so as to make the air vent 101 in different states. When the pull strap reactor 20 tightens the pull strap 30, the air vent 101 is in a closed state, and when the pull strap reactor 20 loosens the pull strap 30, the air vent 101 is in an open state.

[0056] When the gas generator 40 receives a point explosion signal and the pull strap reactor 20 does not receive a response signal, the gas generator 40 reacts, and gas is ejected from the gas generator 40 and fills the air bag body 10. And because the pull strap reactor 20 does not respond, the pull strap 30 on both sides of the air vent 101 remains fixed at both ends. When the air bag body 10 is gradually filled, the pull strap 30 will be gradually tightened, so that the pull strap 30 will tighten the air vent 101 to close the air vent 101.

[0057] There are many ways to set the pull strap reactor 20, which will not be listed one by one here. In the embodiment of the application, only a few setting methods are described.

[0058] The pull strap reactor 20 is provided with a retractable winding structure 201, and the pull strap 30 is wound on the winding structure 201. When the pull strap reactor 20 is in a tensioned state, the winding structure 201 is locked and cannot be retracted, and when the pull strap reactor 20 is in a released state, the winding structure 201 is unlocked and can be retracted.

[0059] Specifically, as shown in FIGS. 3-6, the pull tape reactor 20 is provided with a retractable winding structure 201, which can be a retractable cylindrical winding structure, i.e. the pull tape 30 is wound on the fixed end of the pull tape reactor 20 through the cylindrical winding structure 201. When the pull tape reactor 20 is in a tension state, the winding structure 201 is locked, i.e. the winding structure 201 cannot be retracted, at this time, the pull tape reactor 20 tightens the pull tape 30 thereon, thereby causing the air vent 101 to close, avoiding gas leakage from the air vent 101. When the pull tape reactor 20 is in a release state, the pull tape reactor 20 is activated, i.e. the winding structure 201 is unlocked, at this time the winding structure 201 can be retracted, causing the pull tape 30 fixed on the pull tape reactor 20 to fall off the pull tape reactor 20, i.e. the pull tape 30 is blown open under the air pressure in the inner cavity of the air bag body 10, the air vent 101 is in an open state to release part of the gas in the inner cavity of the air bag body 10, preventing injury to passengers with small body weight or improper sitting posture due to excessive air pressure in the inner cavity of the air bag body.

[0060] The above-mentioned pull tape reactor 20 can be implemented in various ways provided by the prior art, for example, an electromagnetic brake pad can be used. When the pull tape reactor 20 is in a tension state, the electromagnetic coil is powered on, the electromagnetic brake pad is braked, and the winding mechanism 201 cannot be retracted due to the action of the brake pad; when the pull tape reactor 20 is in a release state, the electromagnetic brake pad is released due to power loss, and the winding mechanism 201 can be retracted due to the inaction of the brake pad.

[0061] The pull tape reactor 20 has another setting mode, the pull tape reactor 20 is provided with a shearing structure, the pull tape 30 is fixed on the pull tape reactor 20 through the shearing structure; when the pull tape reactor 20 is in a tension state, the shearing structure does not perform a shearing action; when the pull tape reactor 20 is in a release state, the shearing structure performs a shearing action and cuts the pull tape 30, causing the pull tape 30 to loosen.

[0062] Specifically, the shearing structure is arranged on the pull belt reactor 20, and the pull belt 30 is fixed on the pull belt reactor 20 through the shearing structure, that is, the pull belt 30 is fixed on the fixed end of the pull belt reactor 20 through the shearing structure. When the pull belt reactor 20 is in a tension state, the shearing structure does not perform a shearing action, that is, the shearing structure does not cut the pull belt 30 fixed on the pull belt reactor 20, and the pull belt 30 is also fixed on the fixed end of the pull belt reactor 20. At this time, the pull belt reactor 20 tightens the pull belt thereon, and further causes the air vent 101 to be closed, thereby avoiding gas leakage from the air vent 101. When the pull belt reactor 20 is in a release state, that is, the shearing structure performs a shearing action, at this time, the shearing structure cuts the pull belt 30 fixed on the pull belt reactor 20, so that the pull belt 30 fixed on the pull belt reactor 20 falls off from the pull belt reactor, that is, the pull belt 30 is blown open under the air pressure in the air bag body inner cavity, and the air vent 101 is in an open state, so that a part of the gas in the air bag body 10 inner cavity is released, thereby preventing the air pressure in the air bag body 10 inner cavity from being too large to cause injury to a passenger with a small body weight or an incorrect sitting posture.

[0063] The shearing structure can adopt different modes, for example, the pull belt 30 passes through a shearing hole, one end of the shearing hole is arranged on a telescopic rod which can be retracted, when the telescopic rod is retracted under the action of an electromagnetic force, the opposite blades of the shearing hole are reduced and overlapped, and the pull belt passing through the shearing hole is cut, and the shearing action is performed.

[0064] The pull belt 30 extends into the air bag body 10 inner cavity from the pull belt hole 102 and is connected to the pull belt reactor 20.

[0065] Specifically, the pull belt reactor 20 is arranged in the air bag body 10 inner cavity, the pull belt 30 passes out of the pull belt hole 102 and extends into the air bag body 10 inner cavity, and the pull belt 30 is fixed on the fixed end of the pull belt reactor 20. However, in the embodiment of the present application, the pull belt reactor 20 can also be arranged at other positions of the safety air bag, as long as the pull belt 30 is fixed on the pull belt reactor 20, and the tensioning or loosening of the pull belt 30 can be realized through the pull belt reactor 20.

[0066] The pull belt 30 can be fixed on the air bag wall of the air bag body 10 or the pull belt reactor 20, and the fixing mode of the pull belt 30 can be set according to the working requirement, and the fixing mode of the pull belt 30 will be described in detail.

[0067] The first way is that one end of the pull belt 30 is fixed on the air bag wall of the air bag body 10, and the other end is inserted back and forth in each pull belt hole 102 and extended to be connected on the pull belt reactor 20.

[0068] Specifically, as shown in FIG. 3 and FIG. 4, one end of the pull belt 30 is fixed on the air bag wall of the air bag body 10, that is, one end of the pull belt 30 can be sewn on the outer wall of the air bag body 10, or one end of the pull belt 30 can be sewn on the inner wall of the air bag body 10. After one end of the pull belt 30 is sewn on the air bag wall of the air bag body 10, the other end of the pull belt 30 is inserted back and forth in the pull belt holes 102 on both sides of the air vent 101, that is, the other end of the pull belt 30 is inserted through the pull belt holes 102, and then fixed on the fixed end of the pull belt reactor 20 after the last pull belt hole 102.

[0069] The second way is that after the pull belt 30 is inserted along the pull belt hole 102, both ends of the pull belt 30 are fixed on the pull belt reactor 20.

[0070] Specifically, as shown in FIG. 5 and FIG. 6, one end of the pull belt 30 is fixed on the pull belt reactor 20, that is, one end of the pull belt 30 is fixed on the fixed end of the pull belt reactor 20, and the other end of the pull belt 30 is inserted along the pull belt hole 102, that is, the other end of the pull belt 30 is inserted through the pull belt holes 102 on both sides of the air vent 101, and then fixed on the fixed end of the pull belt reactor 20 after the last pull belt hole 102. Both ends of the pull belt 30 can be fixed on the fixed end of the pull belt reactor 20 respectively, or both ends of the pull belt 30 can be connected and fixed on the fixed end of the pull belt reactor 20, that is, both ends of the pull belt 30 are connected first, and then fixed on the fixed end of the pull belt reactor 20.

[0071] The third way is that after the pull belt 30 is inserted along the pull belt hole 102, both ends of the pull belt 30 are fixed on the air bag wall of the air bag body 10 respectively, and the closed end of the pull belt 30 extending from the pull belt hole 102 is connected with the pull belt reactor.

[0072] Specifically, as shown in FIG. 7 and FIG. 8, after the pull tape 30 is inserted through the pull tape holes 102 on both sides of the air vent 101, the two ends of the pull tape 30 are sewn on the air bag wall of the air bag body 10, that is, the two ends of the pull tape 30 can be sewn on the outer air bag wall of the air bag body 10, or the two ends of the pull tape 30 can be sewn on the inner air bag wall of the air bag body 10. When the two ends of the pull tape 30 are sewn on the air bag wall of the air bag body 10, the closed end of the pull tape 30 extending out of the pull tape hole 102 is connected to the pull tape reactor. It can be understood that when the two ends of the pull tape 30 are sewn on the air bag wall of the air bag body 10, the pull tape 30 forms a closed loop structure, and the closed end of the pull tape 30 can be extended out of the pull tape hole 102 and fixed on the fixed end of the pull tape reactor.

[0073] The above are three fixing modes of the pull tape. The fixing mode of the pull tape 30 can be selected according to the specific working condition, but it is not meant that the fixing mode of the pull tape 30 is only the above three modes. In the embodiments of the present application, all fixing modes of the pull tape 30 are not exhaustively listed. It can be understood that as long as the pull tape 30 can achieve the closing or opening of the air vent 101, the fixing mode of the pull tape 30 involved is within the protection scope of the embodiments of the present application.

[0074] Among them, a plurality of pull tape holes 102 are arranged on both sides of the air vent 101 along the circumference; the pull tape 30 is inserted back and forth along the pull tape holes 102 on the upper and lower sides of the air vent 101; or, the pull tape 30 is inserted back and forth along the pull tape holes 102 on both sides of the air vent 101 in parallel.

[0075] Specifically, as shown in FIG. 3-FIG. 6, a plurality of pull tape holes 102 are arranged on both sides of the air vent 101 along the circumference, that is, the number of the pull tape holes 102 on both sides of the air vent 101, the distance between adjacent pull tape holes 102, and the distance from the air vent 101 can all be equal, all be unequal, or part of them be equal and the rest be unequal. The specific arrangement can be determined according to the specific working condition. In the embodiments of the present application, the pull tape 30 is inserted back and forth along the pull tape holes 102 on both sides of the air vent 101, and the pull tape 30 can be inserted back and forth along the pull tape holes 102 on both sides of the air vent 101 in cross. The insertion method of the pull tape 30 inserted back and forth in cross can better close the air vent 101, so as to avoid the gas in the air bag body 10 from leaking from the air vent 101 when the pull tape reactor 20 is in a tension state.

[0076] As shown in FIG. 7-8, the pull tape 30 can also be inserted back and forth in parallel on both sides of the deflation port 101 along the pull tape hole 101, that is, the insertion mode can better open the deflation port 101. When the pull tape reactor is in a released state, the pull tape reactor loosens the pull tape 30, and the pull tape 30 in the pull tape hole 101 on both sides of the deflation port 101 is blown open under the impact of the air pressure in the air bag body 10 cavity, so that the deflation port 101 is opened, and the gas in the air bag body 10 can be released from the deflation port 101, avoiding injury to passengers with small body weight or improper sitting posture due to excessive air pressure in the air bag body 10 cavity.

[0077] Specifically, the tensioned state and the released state of the pull tape reactor 20 can be switched by electric control, and the pull tape reactor 20 can be used in cooperation with a detection device, so that the pull tape reactor 20 is controlled to be in the released state when the detection device detects that the passenger has a small body weight or an improper sitting posture, and the pull tape reactor 20 is controlled to be in the tensioned state when the detection device detects that the passenger has a normal body weight or a normal sitting posture.

[0078] The detection device can include a sensor, a sitting posture recognition system, etc. When the detection device includes a sensor, the sensor can determine that the passenger has a small body weight when detecting that the passenger has a body weight less than a preset value, and determine that the passenger has a normal body weight when detecting that the passenger has a body weight not less than the preset value. When the detection device includes a sitting posture recognition system, the sitting posture recognition system can determine that the passenger has a normal sitting posture when detecting that the passenger is located in a preset sitting posture area, and determine that the passenger has an improper sitting posture when detecting that the passenger is located outside the preset sitting posture area. Of course, the determination method of the body weight and the sitting posture of the passenger can be any other feasible method, which is not limited herein.

[0079] When the pull tape reactor 20 is in the tensioned state, the pull tape reactor 20 closes the deflation port 101 by tensioning the pull tape 30; when the pull tape reactor 20 is in the released state, the pull tape reactor 20 loosens the pull tape 30, so that the pull tape 30 is blown open under the impact of the air pressure in the air bag body cavity, thereby opening the deflation port 101.

[0080] Specifically, when the detection device detects that the passenger is light or has an incorrect sitting posture, the pull belt reactor 20 is in a release state, that is, the air pressure in the airbag body cavity is too large at this time, which may cause harm to the passenger who is light or has an incorrect sitting posture, and part of the gas in the airbag body cavity needs to be released. That is, the pull belt reactor 20 responds, the pull belt 30 is released from the pull belt reactor 20, and the pulling force of the pull belt 30 on the air release port 101 is also released synchronously. Therefore, under the impact of the air pressure in the airbag body cavity, the air release port 101 breaks away from the pull belt restraint to open the normally open port, thereby unloading the pressure in the airbag body cavity.

[0081] When the detection device detects that the passenger is normal or has a correct sitting posture, the pull belt reactor 20 is in a tension state, that is, the pull belt reactor 20 closes the air release port 101 by tensioning the pull belt 30, to prevent the gas in the airbag body 10 cavity from leaking from the air release port 101.

[0082] The above is a safety airbag provided by the application, which comprises: an airbag body 10, a pull belt reactor 20, and a pull belt 30; the airbag wall of the airbag body 10 is provided with an air release port 101, both sides of the air release port 101 are provided with pull belt holes 102, the pull belt 30 is inserted back and forth in each pull belt hole 102, the pull belt 30 is used to close the air release port 101 when tensioned, and the pull belt 30 is connected to the pull belt reactor 20; when the pull belt reactor 20 is in a tension state, the pull belt reactor 20 closes the air release port 101 by tensioning the pull belt 30; when the pull belt reactor 20 is in a release state, the pull belt reactor 20 releases the pull belt 30, so that the pull belt 30 is blown open under the impact of the air pressure in the airbag body cavity, thereby opening the air release port 101. By providing the pull belt holes 102 on both sides of the air release port 101, and by tensioning or releasing the pull belt 30 in the pull belt holes 102, the air release port 101 is closed when the pull belt reactor 20 is in a tension state, to prevent the gas in the airbag body cavity from leaking, and the air release port 101 is opened when the pull belt reactor is in a release state, to release part of the gas in the airbag body cavity, thereby preventing harm to the passenger who is light or has an incorrect sitting posture due to the excessive air pressure in the airbag body cavity.

[0083] The application also provides an automobile, which comprises the above safety airbag, and specifically as follows.

[0084] The application provides an automobile, and the safety airbag of the automobile comprises: an airbag body, a pull belt reactor, and a pull belt.

[0085] The airbag wall of the airbag body is provided with a deflation port, both sides of the deflation port are provided with a drawstring hole, the drawstring is inserted into each drawstring hole back and forth, the drawstring is used to close the deflation port when being pulled tight, and the drawstring is connected to the drawstring reactor;

[0086] When the drawstring reactor is in the tight state, the drawstring reactor closes the deflation port by pulling the drawstring, and when the drawstring reactor is in the release state, the drawstring reactor loosens the drawstring, so that the drawstring is blown open under the impact of the air pressure in the airbag body cavity, thereby opening the deflation port.

[0087] The specific implementation of the safety airbag in this embodiment is similar to the safety airbag in the above embodiment, and details can be found in the related content of the first embodiment described above, and thus will not be described again.

[0088] It should be noted that although several structures, components or units for implementing related functions are mentioned in the above detailed description, the 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 into a plurality of components, structures or units to be embodied.

[0089] In addition, although the various components of the assembly or device and the installation mode between components in the present application are described in a specific order in the drawings, this does not require or imply that the assembly or device must be designed in this specific component or component installation mode, or must contain all the components shown to achieve the desired results. In addition or alternatively, some components can be omitted, a plurality of components can be combined into one component to achieve the corresponding function, and / or one component can be divided into a plurality of components to achieve the corresponding function, etc.

[0090] Although the present application is disclosed with the preferred embodiments as above, it is not intended to limit the present application, and 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 should be limited by the scope defined by the claims of the present application.

Claims

1. An airbag, characterized by, The 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, and both sides of the deflation port are provided with pull belt holes. The pull belt is inserted back and forth in each pull belt hole, and is used to close the deflation port when being pulled tight. The pull belt is connected to the pull belt reactor. When the pull belt reactor is in a tight state, the pull belt reactor closes the deflation port by pulling the pull belt. When the pull belt reactor is in a release 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 end of the pull belt is fixed to the airbag wall of the airbag body, and the other end is inserted back and forth in each pull belt hole and extends out to be connected to the pull belt reactor.

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

4. The airbag of claim 1, wherein After the pull belt is inserted along the pull belt hole, the two ends of the pull belt are fixed to the airbag wall of the airbag body, respectively. The closed end of the pull belt extending out of the pull belt hole is connected to the pull belt reactor.

5. The airbag of claim 1, wherein Both sides of the deflation port are respectively provided with a plurality of pull belt holes in the circumferential direction. The pull belt is inserted back and forth along each pull belt hole, crossing up and down on both sides of the deflation port. Or, the pull belt is inserted back and forth along each pull belt hole, parallel up and down on both sides of the deflation port.

6. The airbag of claim 5, wherein The distribution of the pull belt holes on both sides of the deflation port is the same.

7. The airbag of claim 1, wherein The pull belt reactor is provided with a retractable winding structure, and the pull belt is wound on the winding structure. When the pull belt reactor is in a tight state, the winding structure is locked and cannot be retracted. When the pull belt reactor is in a release state, the winding structure is unlocked and can be retracted.

8. The airbag of claim 1, wherein The pull belt reactor is provided with a shearing structure, and the pull belt is fixed to the pull belt reactor through the shearing structure. When the pull belt reactor is in a tight state, the shearing structure does not perform shearing action. When the pull belt reactor is in a release state, the shearing structure performs shearing action and cuts the pull belt, so that the pull belt is loosened.

9. The airbag of claim 1, wherein The pull belt extends into the airbag body cavity from the pull belt hole and is connected to the pull belt reactor.

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

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