Safety air bag and automobile

Abstract

The utility model provides an air bag restraint system and an automobile. The air bag restraint system comprises an air bag body, a drawstring reactor and a drawstring. An air release opening is formed in the air bag wall of the air bag body, drawstring holes are formed in the two sides of the air release opening, drawstrings are inserted into the drawstring holes in a back-and-forth mode, the drawstrings are used for closing the air release opening during tensioning, and the drawstrings are connected to the drawstring reactor; when the drawstring reactor is in a tensioned state, the drawstring reactor closes the gas release port by tensioning the drawstring; and when the drawstring reactor is in a release state, the drawstring reactor loosens the drawstring, so that the drawstring is blown open under the air pressure impact of the inner cavity of the air bag body, and the air release opening is opened. According to the safety air bag, the air release opening is closed or opened through tensioning or loosening of the pull belt, and the safety air bag can ensure that the safety air bag is inflated and can prevent passengers with small weight or incorrect sitting postures from being hurt when the safety air bag is unfolded at the same time.

Description

Technical Field

[0001] The present application relates to the field of automobile safety technology, in particular to a safety airbag, and also to an automobile. Background Art

[0002] Airbags are one of the important components of a car's safety system. When a car is involved in an accident, the gas generated by the gas generator rushes towards and fills the airbag, causing it to inflate and deploy to protect the lives of passengers and avoid injury.

[0003] At present, when a car is involved in an accident, the pressure of the airbag deployment is too great, which makes it have a strong impact force. If the passenger is light or has an incorrect sitting posture, the deployed airbag body can easily hit the passenger and cause injury.

[0004] Therefore, it is necessary to prevent a passenger who is light in weight or sitting in an incorrect posture from being injured when an airbag is first deployed. Utility Model Content

[0005] The present application provides a safety airbag to solve the technical problem of how to avoid causing harm to passengers with light weight or improper sitting posture when an automobile accident occurs. The present application also provides an automobile using the safety airbag.

[0006] The present application provides a safety airbag, which comprises: an airbag body, a drawstring reactor and a drawstring; an air vent is arranged on the airbag wall of the airbag body, drawstring holes are arranged on both sides of the air vent, the drawstring is inserted back and forth in each of the drawstring holes, the drawstring is used to close the air vent when tightened, and the drawstring is connected to the drawstring reactor; when the drawstring reactor is in a tightened state, the drawstring reactor closes the air vent by tightening the drawstring; when the drawstring reactor is in a released state, the drawstring reactor loosens the drawstring, so that the drawstring is blown open under the impact of air pressure in the inner cavity of the airbag body, thereby opening the air vent.

[0007] Optionally, one end of the drawstring is fixed to the airbag wall of the airbag body, and the other end is inserted back and forth through each of the drawstring holes and extends out to be connected to the drawstring reactor.

[0008] Optionally, after the drawstring is inserted along the drawstring hole, both ends of the drawstring are fixed on the drawstring reactor.

[0009] Optionally, after the drawstring is inserted along the drawstring hole, both ends of the drawstring are respectively fixed on the airbag wall of the airbag body, and the closed end of the drawstring extending from the drawstring hole is connected to the drawstring reactor.

[0010] Optionally, a plurality of the drawstring holes are provided along the circumferential direction on both sides of the air release port;

[0011] The drawstrings are interlaced up and down along the drawstring holes on both sides of the air vent;

[0012] Alternatively, the drawstrings are inserted back and forth in parallel up and down on both sides of the air vent along the drawstring holes.

[0013] Optionally, the drawstring holes on both sides of the air vent are distributed in the same manner.

[0014] Optionally, a retractable winding structure is provided on the belt reactor, and the belt is wound around the winding structure; when the belt reactor is in a tensioned state, the winding structure is locked and cannot be retracted, and when the belt reactor is in a released state, the winding structure is unlocked and can be retracted.

[0015] Optionally, a shearing structure is provided on the pull-belt reactor, and the pull-belt is fixedly connected to the pull-belt reactor through the shearing structure; when the pull-belt reactor is in a tensioned state, the shearing structure does not perform a shearing action; when the pull-belt reactor is in a released state, the shearing structure performs a shearing action and cuts the pull-belt to loosen the pull-belt.

[0016] Optionally, the drawstring extends from the drawstring hole into the inner cavity of the airbag body and is connected to the drawstring reactor.

[0017] The present application also provides a car, comprising any one of the above-mentioned airbags.

[0018] Compared with the prior art, this application has the following advantages:

[0019] The present application provides a safety airbag, which comprises: an airbag body, a drawstring reactor and a drawstring; an air vent is arranged on the airbag wall of the airbag body, drawstring holes are arranged on both sides of the air vent, the drawstring is inserted back and forth in each of the drawstring holes, the drawstring is used to close the air vent when tightened, and the drawstring is connected to the drawstring reactor; when the drawstring reactor is in a tightened state, the drawstring reactor closes the air vent by tightening the drawstring; when the drawstring reactor is in a released state, the drawstring reactor loosens the drawstring, so that the drawstring is blown open under the impact of air pressure in the inner cavity of the airbag body, thereby opening the air vent.

[0020] The airbag provided by the present application is inflated and deployed when the airbag is in an accident, and the drawstring reactor is in a tensioned state. The drawstring reactor closes the air release port by tightening the drawstring to prevent the gas in the airbag body from leaking from the air release port. When the airbag is fully inflated, if the passenger is light or sitting in an incorrect posture, the drawstring reactor is in a released state by controlling the action of the drawstring reactor. At this time, the drawstring reactor loosens the drawstring, thereby opening the air release port, and the gas is released from the air release port, which can gradually reduce the pressure in the airbag body cavity, and reduce the impact on the passenger when the airbag body is deployed, so as to avoid the airbag from causing harm to passengers with light weight or sitting in an incorrect posture when the airbag is deployed. Moreover, the airbag wall will not squeeze the passenger, so as to avoid the airbag wall blocking the human mouth and nose, so that the passenger's breathing is no longer blocked, and the secondary accident caused by the deployment of the airbag is avoided. At the same time, the present application closes or opens the air release port by tightening or loosening the drawstring, and has the advantages of simple structure, easy installation, low price, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a drawstring reactor of an airbag provided in an embodiment of the present application when it is in a tensioned state.

[0022] Figure 2 It is a schematic structural diagram of a drawstring reactor of an airbag provided in an embodiment of the present application when it is in a released state.

[0023] Figure 3 The present application provides a schematic diagram of the state of a drawstring of a safety airbag, in which one end of the drawstring is fixed to the airbag wall of the airbag body and the other end is connected to a drawstring reactor, and the drawstring reactor and the drawstring are in a tensioned state.

[0024] Figure 4 The present application provides a schematic diagram of the state of a drawstring of a safety airbag, in which one end of the drawstring is fixed to the airbag wall of the airbag body and the other end is connected to a drawstring reactor, and the drawstring reactor and the drawstring are in a released state.

[0025] Figure 5 The present application provides a schematic diagram of the state of a drawstring reactor and a drawstring when both ends of a drawstring of an airbag are fixed on a drawstring reactor and the drawstring reactor is in a tensioned state.

[0026] Figure 6 The present application provides a schematic diagram of the state of a drawstring reactor and a drawstring reactor when both ends of a drawstring of an airbag are fixed on a drawstring reactor and the drawstring reactor is in a released state.

[0027] Figure 7It is a structural schematic diagram of a drawstring of a safety airbag provided in an embodiment of the present application, in which both ends of the drawstring are fixed on the airbag wall of the airbag body, and the drawstring reactor is in a tensioned state.

[0028] Figure 8 It is a schematic structural diagram of a drawstring of a safety airbag provided in an embodiment of the present application, in which both ends of the drawstring are fixed on the airbag wall of the airbag body, and the drawstring reactor is in a released state.

[0029] Reference numerals:

[0030] 10: airbag body; 101: air release port; 102: drawstring hole;

[0031] 20: belt reactor; 201: winding mechanism;

[0032] 30: drawstring;

[0033] 40: Gas generator. DETAILED DESCRIPTION

[0034] Many specific details are described in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present application, so the present application is not limited by the specific implementation disclosed below.

[0035] In the description of the present application, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the related art, when a car accident occurs, a gas generator inflates the airbag and then deploys it to protect the safety of the passengers. However, since the pressure of the airbag deployment is too high, if the passenger is light or has an incorrect sitting posture, the deployed airbag body can easily hit the passenger and cause injury. In other words, a more common injury is that the airbag wall can easily press tightly against the passenger's mouth and nose, hindering the passenger's normal breathing and causing secondary injury to the passenger.

[0037] Based on this, the present application provides an airbag, which includes: an airbag body, a drawstring reactor and a drawstring; an air vent is provided on the airbag wall of the airbag body, and drawstring holes are provided on both sides of the air vent, the drawstring is inserted back and forth in each of the drawstring holes, the drawstring is used to close the air vent when tightened, and the drawstring is connected to the drawstring reactor; when the drawstring reactor is in a tightened state, the drawstring reactor closes the air vent by tightening the drawstring; when the drawstring reactor is in a released state, the drawstring reactor loosens the drawstring, so that the drawstring is blown open under the impact of the air pressure in the inner cavity of the airbag body, thereby opening the air vent.

[0038] It can be understood that, when the airbag provided by the present application is inflated and deployed when an automobile accident occurs, the drawstring reactor is in a tensioned state, and the drawstring reactor closes the air vent by tightening the drawstring to prevent the gas in the airbag body from leaking from the air vent. When the airbag is fully inflated, the drawstring reactor is in a released state by controlling the action of the drawstring reactor. At this time, the drawstring reactor loosens the drawstring, thereby opening the air vent, and the gas is released from the air vent, which can gradually reduce the pressure in the airbag body. That is, the present application can detect passengers through a detection device. If the passenger is light or sitting in an incorrect posture, the drawstring reactor is controlled to loosen the drawstring, so that the air vent is opened, and then the gas can be released from the air vent, thereby reducing the air pressure in the airbag body cavity, reducing the impact on the passenger when the airbag body is deployed, and avoiding the airbag from causing harm to passengers with light weight or sitting in an incorrect posture when the airbag is deployed.

[0039] Next, the airbag provided by the present application will be described in detail with reference to the accompanying drawings.

[0040] The present application provides a safety airbag, which includes an airbag body 10 , a drawstring reactor 20 and a drawstring 30 .

[0041] Specifically, Figure 1 and Figure 2 As shown, the airbag body 10 is a bag-shaped structure surrounded by airbag walls, and the airbag walls are generally made of nylon or polyester fiber fabrics, etc., which have high strength and durability and can withstand the impact force generated during 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 that supports the human body, so as to protect passengers and prevent them from being injured when an automobile accident occurs.

[0042] like Figure 1 and Figure 2 As shown, the airbag body 10 is provided with an air inlet, which is responsible for inputting the gas generated by the gas generator 40 from the air inlet 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 for inflation.

[0043] The airbag wall of the airbag body 10 is provided with an air vent 101 , and drawstring holes 102 are provided on both sides of the air vent 101 . The drawstring 30 is inserted back and forth into each of the drawstring holes 102 .

[0044] It can be understood that the airbag wall of the airbag body 10 is provided with an air vent 101. The air vent 101 is used to release the gas in the inner cavity of the airbag body 10 through the air vent 101 when a car accident occurs, so as to avoid the excessive air pressure in the airbag body 10 causing harm to passengers with small weight or improper sitting posture.

[0045] In the embodiment of the present application, the air vent 101 may be circular or elliptical, and of course it is not excluded that the air vent 101 may have other shapes.

[0046] A drawstring hole 102 is provided on both sides of the air vent 101. Specifically, when the air vent 101 is circular, the drawstring hole 102 can be provided along both sides of the longitudinal direction of the circular air vent; when the air vent 101 is elliptical, the drawstring hole 102 can be provided along both sides of the long axis direction of the elliptical air vent. When the air vent 101 is in other shapes, the drawstring hole 102 can be provided along both sides of the length direction of the air vent 101. Therefore, the shape of the air vent 101 can be determined according to the actual working conditions, and then the setting direction of the drawstring hole 102 is determined by the shape of the air vent 101. Here, no further explanation is given on the shape of the air vent 101 and the setting direction of the drawstring hole 102.

[0047] It should also be noted that the number of the vents 101 provided on the airbag wall of the airbag body 10 can be set according to the actual working conditions. In the embodiment of the present application, there is no specific restriction on the number of the vents 101. In actual work, no matter how many vents 101 are provided on the airbag body 10, it should be noted that the location of the vents 101 must be reasonable; specifically, the vents 101 should be avoided from being provided at a location where the passenger will press when the airbag is working, so as to avoid the vents 101 themselves being blocked by the passenger's body.

[0048] The distribution of the drawstring holes 102 on both sides of the vent 101 is the same. It can be understood that the number of the drawstring holes 102 on both sides of the vent 101, the spacing between adjacent drawstring holes 102, and the distance between the drawstring holes 102 on both sides and the vent 101 are all equal. Of course, the distribution of the drawstring holes on both sides of the air vent may also be different, that is, the number of the drawstring holes 102 on both sides of the air vent 101 is different, and the spacing between adjacent drawstring holes 102 and the distance between the drawstring holes 102 on both sides and the air vent 101 may be equal; it can also be that the number of the drawstring holes 102 on both sides of the air vent 101 is the same, and any one of the spacing between adjacent drawstring holes 102 and the distance between the drawstring holes 102 on both sides and the air vent 101 may be unequal; or, the number of the drawstring holes 102 on both sides of the air vent 101 is different, and the spacing between adjacent drawstring holes 102 and the distance between the drawstring holes 102 on both sides and the air vent 101 are also unequal. The distribution of the drawstring holes 102 on both sides of the air vent 101 can be determined according to specific actual conditions.

[0049] In the embodiment of the present application, there is no specific requirement for the number of the drawstring holes 102 on both sides of the air vent 101, as long as the working requirements are met. However, it should be noted that the drawstring 30 is inserted into the drawstring hole 102, and there is friction between the drawstring 30 and the drawstring hole 102, which will hinder the movement of the drawstring 30 in the drawstring hole 102, and the more the drawstring holes 102, the greater the obstruction to the drawstring 30, so the drawstring holes 102 should not be too many. But at the same time, if the drawstring holes 102 are too few, the drawstring 30 will not have a good effect on closing the air vent 101, so the number of the drawstring holes 102 on both sides of the air vent 101 should not be too many or too few. When setting the number of the drawstring holes 102, it is necessary to comprehensively consider so that the number of the drawstring holes 102 will have a small obstruction to the drawstring 30, and the closing effect of the air vent 101 can also meet the working requirements. Here, if the friction force of the drawstring hole 102 on the drawstring 30 is too large, a relatively smooth inlay ring can be fixed in the drawstring hole 102 , that is, a relatively smooth inlay ring can be fixed in the drawstring hole 102 , which can reduce the friction force on the drawstring 30 .

[0050] Specifically, in the embodiment of the present application, three strap holes 102 are respectively provided on the left and right sides of the air vent 101, or two strap holes 102 are respectively provided on each side, and the number of strap holes 102 can be set according to specific working conditions.

[0051] The shape of the drawstring hole 102 can be circular or elliptical, but it does not exclude that the drawstring hole 102 can also be other shapes. The drawstring hole 102 is for inserting the drawstring 30 into the drawstring hole 102 . Therefore, the size of the drawstring hole 102 can be any size as long as the drawstring 30 can be inserted into the drawstring hole 102 .

[0052] The drawstring 30 is used to close the air leakage opening 101 when tightened. Figure 3 , Figure 5 and Figure 8 As shown, the drawstring hole 102 provides an insertion path for the drawstring 30, and the drawstring 30 can be inserted back and forth along the drawstring holes 102 set on both sides of the air vent 101. The drawstring 30 can be inserted into the drawstring hole 102, and then the air vent 101 can be closed by pulling the drawstring 30 to prevent gas leakage in the airbag body 10. In the embodiment of the present application, the drawstring 30 can be a flexible drawstring, but it is not excluded that the drawstring 30 can also be other structures, such as an elastic drawstring.

[0053] The drawstring 30 is connected to the drawstring reactor 20. Specifically, the drawstring reactor 20 is used to control the drawstring 30, and the drawstring 30 can be tightened or loosened by the drawstring reactor 20, so that the vent 101 is in different states, such as when the drawstring reactor 20 tightens the drawstring 30, the vent 101 is in a closed state, and when the drawstring reactor 20 loosens the drawstring 30, the vent 101 is in an open state.

[0054] When the gas generator 40 receives the detonation signal and the drawstring reactor 20 does not receive the response signal, the gas generator 40 reacts, and the gas rushes out of the gas generator 40 and fills the airbag body 10. Since the drawstring reactor 20 does not respond, the drawstrings 30 on both sides of the air vent 101 remain fixed at both ends. When the airbag body 10 is gradually filled, the two ends of the drawstrings 30 will be gradually tightened, so that the drawstrings 30 will tighten the air vent 101 to close the air vent 101.

[0055] There are many ways to set up the belt reactor 20, which will not be listed here one by one. In the embodiments of the present application, only a few setting methods are schematically described.

[0056] Among them, a retractable winding structure 201 is provided on the belt reactor 20, and the belt 30 is wound on the winding structure 201; when the belt reactor 20 is in a tensioned state, the winding structure 201 is locked and cannot be retracted, and when the belt reactor 20 is in a released state, the winding structure 201 is unlocked and can be retracted.

[0057] Specifically, Figure 3-Figure 6 As shown, a retractable winding structure 201 is provided on the belt reactor 20, and the winding structure 201 may be a retractable cylindrical structure, that is, the belt 30 is wound around the fixed end of the belt reactor 20 through the cylindrical winding structure 201. When the belt reactor 20 is in a tensioned state, the winding structure 201 is locked, that is, the winding structure 201 cannot be retracted. At this time, the belt reactor 20 tightens the belt 30 thereon, thereby closing the gas vent 101 to prevent gas from leaking from the gas vent 101. When the drawstring reactor 20 is in a released state, the drawstring reactor 20 is activated, that is, the winding structure 201 is unlocked, and at this time, the winding structure 201 can retract, so that the drawstring 30 fixed on the drawstring reactor 20 falls off the drawstring reactor 20, that is, the drawstring 30 is blown open under the air pressure in the inner cavity of the airbag body 10, and the air vent 101 is in an open state to release part of the gas in the inner cavity of the airbag body 10, thereby preventing injuries to passengers with light weight or incorrect sitting posture due to excessive air pressure in the inner cavity of the airbag body.

[0058] The above-mentioned belt reactor 20 can be implemented in a variety of ways provided by the prior art. For example, it can be implemented by using an electromagnetic brake pad. When the belt reactor 20 is in a tensioned state, the electromagnetic coil is energized, the electromagnetic brake pad is braked, and the winding mechanism 201 cannot be retracted due to the action of the brake pad; when the belt reactor 20 is in a released state, the electromagnetic brake pad is loosened due to power loss, and the winding mechanism 201 can be retracted because the brake pad does not work.

[0059] The strap reactor 20 has another arrangement mode, in which a shearing structure is arranged on the strap reactor 20, and the strap 30 is fixedly connected to the strap reactor 20 through the shearing structure; when the strap reactor 20 is in a tensioned state, the shearing structure does not perform a shearing action; when the strap reactor 20 is in a released state, the shearing structure performs a shearing action and cuts the strap 30, thereby loosening the strap 30.

[0060] Specifically, a shearing structure is provided on the belt reactor 20, and the belt 30 is fixed on the belt reactor 20 by the shearing structure, that is, the belt 30 is fixed to the fixed end of the belt reactor 20 by the shearing structure. When the belt 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 30 fixed on the belt reactor 20, and the belt 30 is still fixed on the fixed end of the belt reactor 20. At this time, the belt reactor 20 tightens the belt thereon, thereby closing the gas vent 101 to prevent gas from leaking from the gas vent 101. When the drawstring reactor 20 is in a released state, that is, the shearing structure performs a shearing action, the shearing structure cuts off the drawstring 30 fixed on the drawstring reactor 20, so that the drawstring 30 fixed on the drawstring reactor 20 falls off the drawstring reactor, that is, the drawstring 30 is blown open under the air pressure in the inner cavity of the airbag body, and the air vent 101 is in an open state to release part of the gas in the inner cavity of the airbag body 10, thereby preventing injuries to passengers with light weight or incorrect sitting posture due to excessive air pressure in the inner cavity of the airbag body 10.

[0061] The above-mentioned shearing structure can be implemented in different ways. For example, the drawstring 30 passes through a shearing opening, one end of which is arranged on a telescopic rod that can be extended. When the telescopic rod is retracted under the action of electromagnetic force, the blade edge relative to the shearing opening shrinks and overlaps, and the drawstring passing through this position is cut off, thereby executing the shearing action.

[0062] The drawstring 30 extends from the drawstring hole 102 into the inner cavity of the airbag body 10 and is connected to the drawstring reactor 20 .

[0063] Specifically, the drawstring reactor 20 is disposed in the inner cavity of the airbag body 10, the drawstring 30 passes through the drawstring hole 102 and extends into the inner cavity of the airbag body 10, and the drawstring 30 is fixed to the fixed end of the drawstring reactor 20. However, in the embodiment of the present application, it is not excluded that the drawstring reactor 20 can be disposed at other positions of the safety airbag, and the drawstring 30 only needs to be fixed to the drawstring reactor 20, and the drawstring 30 can be tightened or loosened through the drawstring reactor 20.

[0064] The drawstring 30 can be fixed on the airbag wall of the airbag body 10 or on the drawstring reactor 20. The fixing method of the drawstring 30 can be set according to work requirements. Next, the fixing method of the drawstring 30 will be described in detail.

[0065] In the first mode, one end of the drawstring 30 is fixed to the airbag wall of the airbag body 10 , and the other end is inserted back and forth through the drawstring holes 102 and extends out to be connected to the drawstring reactor 20 .

[0066] Specifically, Figure 3 and Figure 4 As shown, one end of the drawstring 30 is fixed to the airbag wall of the airbag body 10, that is, one end of the drawstring 30 can be sewn to the airbag outer wall of the airbag body 10, or one end of the drawstring 30 can be sewn to the airbag inner wall of the airbag body 10. After one end of the drawstring 30 is sewn to the airbag wall of the airbag body 10, after the other end of the drawstring 30 is inserted back and forth through the drawstring holes 102 on both sides of the vent 101, that is, after the other end of the drawstring 30 is inserted through the drawstring holes 102 and passes through the last drawstring hole 102, it is fixed to the fixed end of the drawstring reactor 20.

[0067] In a second manner, after the drawstring 30 is inserted along the drawstring hole 102 , both ends of the drawstring 30 are fixed on the drawstring reactor 20 .

[0068] Specifically, Figure 5 and Figure 6 As shown, 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 after the other end of the pull belt 30 is inserted along the pull belt hole 102, that is, after 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 passes through the last pull belt hole 102, it is fixed on the fixed end of the pull belt reactor 20. The two ends of the pull belt 30 can be fixed on the fixed ends of the pull belt reactor 20 respectively, or the two ends of the pull belt 30 can be connected to the fixed end of the pull belt reactor 20, that is, the two ends of the pull belt 30 are first connected together, and then fixed to the fixed end of the pull belt reactor 20.

[0069] In a third manner, after the drawstring 30 is inserted along the drawstring hole 102 , both ends of the drawstring 30 are respectively fixed on the airbag wall of the airbag body 10 , and the closed end of the drawstring 30 extending from the drawstring hole 102 is connected to the drawstring reactor.

[0070] Specifically, Figure 7 and Figure 8As shown, after the drawstring 30 is inserted along the drawstring holes 102 on both sides of the air vent 101, the two ends of the drawstring 30 are sewn to the airbag wall of the airbag body 10, that is, the two ends of the drawstring 30 can be sewn to the airbag outer wall of the airbag body 10, or the two ends of the drawstring 30 can be sewn to the airbag inner wall of the airbag body 10. When the two ends of the drawstring 30 are sewn to the airbag wall of the airbag body 10, the closed end of the drawstring 30 extending from the drawstring hole 102 is connected to the drawstring reactor. It can be understood that when the two ends of the drawstring 30 are sewn to the airbag wall of the airbag body 10, the drawstring 30 forms a closed loop structure, and the closed end of the drawstring 30 can be extended from the drawstring hole 102 and fixed to the fixed end of the drawstring reactor.

[0071] The above are three fixing methods of the drawstring, and the fixing method of the drawstring 30 can be selected according to the specific working conditions, but it does not mean that the fixing methods of the drawstring 30 are limited to the above three methods. The embodiments of the present application do not exhaustively list all the fixing methods of the drawstring 30. It can be understood that as long as the closing or opening of the air vent 101 can be achieved by the drawstring 30, at this time, the fixing methods of the drawstring 30 involved are all within the protection scope of the embodiments of the present application.

[0072] Among them, a plurality of drawstring holes 102 are respectively provided along the circumferential direction on both sides of the air vent 101; the drawstring 30 crosses and intersperses back and forth on the upper and lower sides of the air vent 101 along each of the drawstring holes 102; or, the drawstring 30 parallelly intersperses back and forth on the upper and lower sides of the air vent 101 along each of the drawstring holes 102.

[0073] Specifically, Figure 3-Figure 6 As shown, a plurality of the drawstring holes 102 are respectively arranged along the circumferential direction on both sides of the air vent 101, that is, the number of the drawstring holes 102 on both sides of the air vent 101, the spacing between adjacent drawstring holes 102, and the distance from the air vent 101 can be all equal, or all unequal, or some of them can be equal and the rest can be unequal. The specific setting can be determined according to the specific working conditions. In the embodiment of the present application, the drawstring 30 is interlaced back and forth along the drawstring holes 102 on both sides of the air vent 101. The drawstring 30 can be interlaced up and down along each of the drawstring holes 102 on both sides of the air vent 101. The interlacing method is similar to the interlacing method of the shoelaces of running shoes. The interlacing method of the drawstring 30 can better close the air vent 101 and prevent the gas in the airbag body 10 from leaking from the air vent 101 when the drawstring reactor 20 is in a tensioned state.

[0074] like Figure 7-Figure 8 As shown, the drawstring 30 can also be inserted back and forth in parallel up and down on both sides of the air vent 101 along the drawstring hole 101, that is, this insertion method can better open the air vent 101. When the drawstring reactor is in a released state, the drawstring reactor loosens the drawstring 30, and the drawstrings 30 in the drawstring holes 101 on both sides of the air vent 101 are blown open under the impact of the air pressure in the inner cavity of the airbag body 10, so that the air vent 101 is opened, and the gas in the airbag body 10 can be released from the air vent 101, avoiding damage to passengers with light weight or incorrect sitting posture due to excessive air pressure in the inner cavity of the airbag body 10.

[0075] Specifically, the tensioned state and the released state of the drawstring reactor 20 can be switched by electronic control, and the drawstring reactor 20 can be used in conjunction with the detection device, so that when the detection device detects that the passenger is light in weight or has an incorrect sitting posture, the drawstring reactor 20 is controlled to be in the released state, and when the detection device detects that the passenger is normal in weight or has a normal sitting posture, the drawstring reactor 20 is controlled to be in the tensioned state.

[0076] The detection device may include a sensor, a sitting posture recognition system, etc. When the detection device includes a sensor, the sensor may determine that the passenger is light in weight when it detects that the passenger's weight is less than a preset value, and determine that the passenger is of normal weight when it detects that the passenger's weight is not less than a preset value. When the detection device includes a sitting posture recognition system, the sitting posture recognition system may determine that the passenger's sitting posture is normal when it detects that the passenger is located in a preset sitting posture area, and determine that the passenger is sitting in an incorrect posture when it detects that the passenger is located outside the preset sitting posture area. Of course, the method for determining the passenger's weight and sitting posture may be any other feasible method, which is not limited here.

[0077] When the drawstring reactor 20 is in a tensioned state, the drawstring reactor 20 closes the air vent 101 by tensioning the drawstring 30; when the drawstring reactor 20 is in a released state, the drawstring reactor 20 loosens the drawstring 30, so that the drawstring 30 is blown open by the air pressure impact in the inner cavity of the airbag body, thereby opening the air vent 101.

[0078] Specifically, when the detection device detects that the passenger is light or sitting in an incorrect posture, the drawstring reactor 20 is in a released state, that is, at this time, the air pressure in the inner cavity of the airbag body is too high, which may cause harm to passengers with light weight or sitting in an incorrect posture, and it is necessary to release part of the gas in the inner cavity of the airbag body. That is, the drawstring reactor 20 responds, the drawstring 30 will be loosened from the drawstring reactor 20, and the tension applied by the drawstring 30 on the air release port 101 is also released synchronously, so that the air release port 101 is impacted by the air pressure in the inner cavity of the airbag body, and the air release port 101 breaks free from the drawstring and opens to form a normally open position, thereby unloading the pressure in the inner cavity of the airbag body.

[0079] When the detection device detects that the passenger's weight or sitting posture is normal, the drawstring reactor 20 is in a tensioned state, that is, at this time, the drawstring reactor 20 closes the vent 101 by tightening the drawstring 30 to prevent the gas in the inner cavity of the airbag body 10 from escaping from the vent 101.

[0080] The above is a safety airbag provided by the present application, and the safety airbag includes: an airbag body 10, a drawstring reactor 20 and a drawstring 30; an airbag wall of the airbag body 10 is provided with an air vent 101, and drawstring holes 102 are provided on both sides of the air vent 101, and the drawstring 30 is inserted back and forth in each of the drawstring holes 102, and the drawstring 30 is used to close the air vent 101 when tightened, and the drawstring 30 is connected to the drawstring reactor 20; when the drawstring reactor 20 is in a tightened state, the drawstring reactor 20 closes the air vent 101 by tightening the drawstring 30; when the drawstring reactor 20 is in a released state, the drawstring reactor 20 loosens the drawstring 30, so that the drawstring 30 is blown open under the impact of the air pressure in the inner cavity of the airbag body, thereby opening the air vent 101. The present application realizes that the air vent 101 is closed when the drawstring reactor 20 is in a tensioned state, thereby preventing gas leakage in the inner cavity of the airbag body, and that the air vent 101 is opened when the drawstring reactor is in a released state, thereby partially releasing gas in the inner cavity of the airbag body, thereby preventing injuries to passengers with light weight or incorrect sitting posture due to excessive air pressure in the inner cavity of the airbag body.

[0081] The present application also provides a car, which includes the above-mentioned safety airbag, as follows.

[0082] The embodiment of the present application provides a car, wherein the safety airbag of the car comprises: an airbag body, a drawstring reactor and a drawstring;

[0083] The airbag wall of the airbag body is provided with an air vent, and drawstring holes are provided on both sides of the air vent. The drawstring is inserted back and forth in each of the drawstring holes. The drawstring is used to close the air vent when tightened, and the drawstring is connected to the drawstring reactor;

[0084] When the drawstring reactor is in a tensioned state, the drawstring reactor closes the vent by tensioning the drawstring; when the drawstring reactor is in a released state, the drawstring reactor loosens the drawstring, causing the drawstring to be blown open by the air pressure impact in the inner cavity of the airbag body, thereby opening the vent.

[0085] The specific implementation of the airbag in this embodiment is similar to that of the airbag in the above embodiment. Please refer to the relevant contents of the above first embodiment for details, and no unnecessary details will be given here.

[0086] It should be noted that, although several structures, components or units for realizing related functions are mentioned in the above detailed description, such 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 concretized in one structure, component or unit. Conversely, the features and functions of one structure, component or unit described above can be further divided into multiple components, structures or units to be concretized.

[0087] In addition, although the components and the installation methods of the components or devices in the present application are described in a specific order in the drawings, this does not require or imply that the components or devices must be designed according to the specific components or the installation methods of the components, or that all the components shown must be included to achieve the desired results. Additionally or alternatively, some components can be omitted, multiple components can be combined into one component to achieve corresponding functions, and / or one component can be decomposed into multiple components to achieve corresponding functions, etc.

[0088] Although the present application is disclosed as above in the form of a preferred embodiment, it is not intended to limit the present application. Any technical personnel in this field may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

Claims

1. A safety airbag, characterized in that: The safety airbag comprises: an airbag body, a drawstring reactor and a drawstring; The airbag wall of the airbag body is provided with an air vent, and drawstring holes are provided on both sides of the air vent. The drawstring is inserted back and forth in each of the drawstring holes. The drawstring is used to close the air vent when tightened, and the drawstring is connected to the drawstring reactor; When the drawstring reactor is in a tensioned state, the drawstring reactor closes the vent by tensioning the drawstring; when the drawstring reactor is in a released state, the drawstring reactor loosens the drawstring, causing the drawstring to be blown open by the air pressure impact in the inner cavity of the airbag body, thereby opening the vent.

2. The airbag according to claim 1, characterized in that: One end of the drawstring is fixed on the airbag wall of the airbag body, and the other end is inserted back and forth through each of the drawstring holes and extends out to be connected to the drawstring reactor.

3. The airbag according to claim 1, characterized in that: After the drawstring is inserted along the drawstring hole, both ends of the drawstring are fixed on the drawstring reactor.

4. The airbag according to claim 1, characterized in that: After the drawstring is inserted along the drawstring hole, both ends of the drawstring are respectively fixed on the airbag wall of the airbag body, and the closed end of the drawstring extending from the drawstring hole is connected to the drawstring reactor.

5. The airbag according to claim 1, characterized in that: A plurality of the drawstring holes are respectively provided along the circumferential direction on both sides of the air release port; The drawstrings are interlaced up and down along the drawstring holes on both sides of the air vent; Alternatively, the drawstrings are inserted back and forth in parallel up and down on both sides of the air vent along the drawstring holes.

6. The airbag according to claim 5, characterized in that: The drawstring holes on both sides of the air vent are distributed in the same manner.

7. The airbag according to claim 1, characterized in that: The belt reactor is provided with a retractable winding structure, on which the belt is wound; when the belt reactor is in a tensioned state, the winding structure is locked and cannot be retracted; when the belt reactor is in a released state, the winding structure is unlocked and can be retracted.

8. The airbag according to claim 1, characterized in that: The drawstring reactor is provided with a shearing structure, through which the drawstring is fixedly connected to the drawstring reactor; when the drawstring reactor is in a tensioned state, the shearing structure does not perform a shearing action; when the drawstring reactor is in a released state, the shearing structure performs a shearing action and cuts the drawstring to loosen it.

9. The airbag according to claim 1, characterized in that: The drawstring extends from the drawstring hole into the inner cavity of the airbag body and is connected to the drawstring reactor.

10. An automobile, characterized in that: Comprising the airbag as described in any one of claims 1-9.

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