Safety air bag and automobile

Abstract

The utility model provides a safety air bag and an automobile. The safety air bag comprises an air bag body and a drawstring reactor. A first air release opening is formed in the airbag wall of the airbag body; the outer surface of the air bag body is provided with a first blocking piece and a second blocking piece which are located at the first air leakage opening. The first side of the first blocking piece is fixed to the first side of the first air leakage opening, and the first side of the second blocking piece is fixed to the second side of the first air leakage opening. A first drawstring hole is formed in the second side of the first separation blade, and a second drawstring hole is formed in the second side of the second separation blade; the drawstring penetrates through the first drawstring hole and the second drawstring hole, and can pull the first baffle plate through the first drawstring hole and pull the second baffle plate through the second drawstring hole; the drawstring extends into the inner cavity of the air bag body from the first air outlet, and the first end of the drawstring is connected to the drawstring reactor. According to the air bag restraint system, the inflation efficiency of the air bag restraint system can be guaranteed, and meanwhile the air bag restraint system can be prevented from hurting passengers with small weight or incorrect sitting postures when unfolded.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts, and in particular to an airbag and an automobile. Background Art

[0002] Cars have become an indispensable means of transportation for people's daily travel, and the safety performance of cars has attracted more and more attention. As an important part of the passive safety system of cars, the airbag's protective function directly affects the life safety of passengers.

[0003] An airbag generally includes a gas generator and an airbag body. When the airbag is triggered, the gas generator inflates the inner cavity of the airbag body, causing the airbag body to expand and pop out to protect the passenger. However, the high-intensity air pressure in the inner cavity of the airbag body will always exert force on the airbag wall, and the airbag body has a strong impact force when it is deployed. If the passenger is light or has an incorrect sitting posture, the deployed airbag body can easily hit the passenger and cause injury. It can also easily cause the airbag wall to always press on the passenger's mouth and nose, hindering the passenger's normal breathing. This problem may even cause injury to the passenger. Therefore, how to ensure the inflation efficiency of the airbag while avoiding injury to passengers with light weight or incorrect sitting posture when the airbag is deployed has become a technical problem to be solved. Utility Model Content

[0004] The present application provides an airbag to solve at least one of the above technical problems. The present application also provides a car using the airbag.

[0005] The present application provides a safety airbag, which includes: an airbag body and a pull belt reactor;

[0006] A first air release port is provided on the air bag wall of the air bag body;

[0007] A first baffle and a second baffle are provided on the outer surface of the airbag body and are located at the first air leakage port; a first side of the first baffle is fixed to the first side of the first air leakage port, and a first side of the second baffle is fixed to the second side of the first air leakage port;

[0008] The second side of the first baffle and the second side of the second baffle are both connected to a drawstring; the drawstring extends from the first air release port into the inner cavity of the airbag body, and a first end of the drawstring is connected to a drawstring reactor;

[0009] When the drawstring reactor is in a tensioned state, the drawstring is pulled, so that the first baffle and the second baffle are partially overlapped and cover the first air vent under the action of the drawstring; when the drawstring reactor is in a released state, the drawstring reactor loosens the drawstring, so that the first baffle and the second baffle covering the first air vent can be blown open under the impact of the air pressure in the inner cavity of the airbag body.

[0010] Optionally, the second end of the drawstring that is not connected to the drawstring reactor is fixed to the outer wall of the airbag body;

[0011] Alternatively, the second end of the drawstring that is not connected to the drawstring reactor is fixed on the inner wall of the inner cavity of the airbag body.

[0012] Optionally, a second end of the drawstring opposite to the first end is fixed to the first baffle, and the drawstring extends from the second end through a second drawstring hole on the second side of the second baffle and then extends into the inner cavity of the airbag body from the first air release port;

[0013] Alternatively, the second end of the drawstring opposite to the first end is fixed on the second baffle, and the drawstring starts from the second end, passes through the first drawstring hole on the second side of the first baffle, and then extends into the inner cavity of the airbag body from the first air release port.

[0014] Optionally, a first drawstring hole is provided on the second side of the first baffle, and a second drawstring hole is provided on the second side of the second baffle; the drawstring passes through the first drawstring hole and the second drawstring hole, and is capable of pulling the first baffle through the first drawstring hole, and pulling the second baffle through the second drawstring hole.

[0015] Optionally, two of each of the first and second strap holes are provided, and two pairs of first and second strap holes corresponding to each other are formed through corresponding positional relationships;

[0016] The drawstring reactor is in a tensioned state, and when the first baffle and the second baffle are partially overlapped, the first drawstring hole and the second drawstring hole corresponding to each other are overlapped with each other.

[0017] Optionally, the drawstring includes a first drawstring section and a second drawstring section, the first drawstring section passes through a pair of first drawstring holes and a second drawstring hole, and the second drawstring section passes through another pair of first drawstring holes and a second drawstring hole.

[0018] Optionally, the drawstring includes a first drawstring section, a second drawstring section and a third drawstring section, the first drawstring section passes through a pair of first drawstring holes and second drawstring holes, the second drawstring section passes through another pair of first drawstring holes and second drawstring holes, and the third drawstring section is arranged in the inner cavity of the airbag body, one end of which is respectively connected to the first drawstring section and the second drawstring section, and the other end of which serves as the first end of the drawstring connecting the drawstring reactor.

[0019] Optionally, a second air release port is further provided on the airbag wall of the airbag body;

[0020] A third baffle and a fourth baffle are provided on the outer surface of the airbag body and are located at the second air leakage port; a first side of the third baffle is fixed to a first side of the second air leakage port, and a first side of the third baffle is fixed to a second side of the second air leakage port;

[0021] The second side of the third baffle and the second side of the fourth baffle are both connected to another drawstring; the drawstring extends from the second air release port into the inner cavity of the airbag body, and the first end of the drawstring is connected to the drawstring reactor.

[0022] Optionally, a rotatable winding mechanism is provided on the belt reactor, and the first end of the belt is wound around the winding mechanism; when the belt reactor is in a tensioned state, the winding mechanism is locked and cannot rotate, and when the belt reactor is in a released state, the winding mechanism is unlocked and can rotate.

[0023] Optionally, a shearing mechanism is provided on the pull-belt reactor, and the first end of the pull-belt is fixedly connected to the pull-belt reactor through the shearing mechanism; when the pull-belt reactor is in a tensioned state, the shearing mechanism does not perform a shearing action; when the pull-belt reactor is in a released state, the shearing mechanism performs a shearing action, cutting the pull-belt at a position close to the first end of the pull-belt, thereby loosening the pull-belt.

[0024] The present application also provides a car, which comprises any feasible safety airbag as described above.

[0025] Compared with the prior art, this application has the following advantages:

[0026] In this type of airbag, a first air release port is provided on the airbag wall of the airbag body, a first air release port is provided on the airbag wall of the airbag body, and a first baffle and a second baffle that can partially overlap are provided on the outer surface of the airbag body, and are controlled by a drawstring. When the airbag body is inflated, the passenger can be detected by a detection device. If the passenger is light in weight or has an incorrect sitting posture, the drawstring reactor is controlled to loosen the drawstring, so that the first baffle and the second baffle can release the cover of the first air release port, so that the gas can be released from the first air release port, thereby reducing the air pressure in the inner cavity of the airbag body, reducing the impact on the passenger when the airbag body is deployed, and avoiding the injury to passengers with light weight or incorrect sitting posture when the airbag is deployed. The airbag wall will not squeeze the human body, thereby avoiding the airbag wall blocking the human mouth and nose, so that the passenger's breathing is no longer blocked, and secondary accidents caused by the deployment of the airbag are avoided. At the same time, since the drawstring extends directly from the air vent into the inner cavity of the airbag, when the drawstring pulls the first baffle plate and the second baffle plate to cover the first air vent, the gas in the airbag body will basically not escape, thereby ensuring the inflation efficiency of the airbag while avoiding harm to passengers with light weight or incorrect sitting posture when the airbag is deployed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] 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.

[0029] Figure 3 It is a cross-sectional view of a distal airbag provided by an embodiment of the present application, in which a drawstring pulls a first baffle and a second baffle to cover a first air release port.

[0030] Figure 4 It is a schematic structural diagram of an airbag body of an airbag provided in an embodiment of the present application.

[0031] Figure 5 It is a schematic diagram of a state in which the second end of a drawstring of a safety airbag provided in an embodiment of the present application is fixed to the outer wall of the airbag and the drawstring reactor is in a tensioned state.

[0032] Figure 6 It is a schematic diagram of the state of a drawstring reactor and a drawstring of a safety airbag provided in an embodiment of the present application, when the second end of the drawstring of the airbag is fixed to the outer wall of the airbag and the drawstring reactor is in a released state.

[0033] Figure 7 It is a schematic diagram of a state in which the second end of a drawstring of an airbag provided in an embodiment of the present application is fixed on a first baffle and the drawstring reactor is in a tensioned state.

[0034] Figure 8 It is a schematic diagram of the state of a drawstring reactor and a drawstring of a safety airbag provided in an embodiment of the present application, in which the second end of the drawstring is fixed on a first baffle and the drawstring reactor is in a released state.

[0035] Fig. 9 It is a schematic diagram of the state of a drawstring reactor and a drawstring of a safety airbag provided in an embodiment of the present application, in which the second end of the drawstring is fixed on a second baffle and the drawstring reactor is in a released state.

[0036] Reference numerals:

[0037] Airbag body 10; first air release port 11;

[0038] First baffle 21; first drawstring hole 211; second baffle 22; second drawstring hole 221;

[0039] Drawstring 30;

[0040] Belt reactor 40; winding mechanism 41;

[0041] Gas generator 50. DETAILED DESCRIPTION

[0042] 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.

[0043] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] An airbag generally includes a gas generator and an airbag body. When the airbag is triggered, the gas generator inflates the inner cavity of the airbag body, causing the airbag body to expand and pop out to protect the passenger. However, the high-intensity air pressure in the inner cavity of the airbag body will always exert force on the airbag wall, and the airbag body has a strong impact force when it is deployed. If the passenger is light or has an incorrect sitting posture, the deployed airbag body can easily hit the passenger and cause injury. It can also easily cause the airbag wall to always press on the passenger's mouth and nose, hindering the passenger's normal breathing. This problem may even cause injury to the passenger. Therefore, how to ensure the inflation efficiency of the airbag while avoiding injury to passengers with light weight or incorrect sitting posture when the airbag is deployed has become a technical problem to be solved.

[0046] In order to solve the above problems, this embodiment provides a feasible airbag. In this airbag, a first air release port is arranged on the airbag wall of the airbag body, and a first baffle and a second baffle that can partially overlap are arranged on the outer surface of the airbag body, and are controlled by a drawstring. When the airbag body is inflated, the passenger can be detected by the detection device. If the passenger is light in weight or has an incorrect sitting posture, the drawstring reactor is controlled to loosen the drawstring, so that the first baffle and the second baffle can release the cover of the first air release port, so that the gas can be released from the first air release port, thereby reducing the air pressure in the inner cavity of the airbag body, reducing the impact on the passenger when the airbag body is deployed, and avoiding the injury to the passenger with light weight or incorrect sitting posture when the airbag is deployed. The airbag wall will not squeeze the human body, thereby avoiding the airbag wall blocking the human mouth and nose, so that the passenger's breathing is no longer blocked, and secondary accidents caused by the deployment of the airbag are avoided. At the same time, since the drawstring extends directly from the air vent into the inner cavity of the airbag, when the drawstring pulls the first baffle plate and the second baffle plate to cover the first air vent, the gas in the airbag body will basically not escape, thereby ensuring the inflation efficiency of the airbag while avoiding harm to passengers with light weight or incorrect sitting posture when the airbag is deployed.

[0047] Such airbags as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, 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. 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. Figure 3 It is a cross-sectional view of a distal airbag provided by an embodiment of the present application, in which a drawstring pulls a first baffle and a second baffle to cover a first air release port. Figure 4 It is a schematic structural diagram of an airbag body of an airbag provided in an embodiment of the present application. Figure 5 It is a schematic diagram of a state in which the second end of a drawstring of a safety airbag provided in an embodiment of the present application is fixed to the outer wall of the airbag and the drawstring reactor is in a tensioned state. Figure 6 The second end of the drawstring of an airbag provided by the embodiment of the present application is fixed on the outer wall of the airbag and the drawstring reactor and the drawstring are in a released state. As shown in the figure, the airbag includes: an airbag body 10 and a drawstring reactor 40.

[0048] The airbag body 10 is a bag-like structure surrounded by airbag walls. The airbag walls are generally made of nylon or polyester 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.

[0049] like Figure 1 and Figure 2 As shown, the airbag body 10 is provided with an air inlet, and the gas generated by the gas generator 50 responsible for generating and outputting gas can extend from the air inlet into the inner cavity of the airbag body 10, and the gas generator 50 can also be directly installed in the inner cavity of the airbag body 10. When the gas generator 50 generates and outputs gas, the gas enters the inner cavity of the airbag body 10 for inflation.

[0050] like Figure 3 and Figure 4 As shown, a first air vent 11 is provided on the airbag wall of the airbag body 10; a first baffle 21 and a second baffle 22 are provided on the outer surface of the airbag body 10 and are located at the first air vent 11; a first side of the first baffle 21 is fixed to a first side of the first air vent 11, and a first side of the second baffle 22 is fixed to a second side of the first air vent 11.

[0051] The first air release port 11 is an outlet for releasing the gas in the inner cavity of the airbag body 10 , and can be an air release slit directly cut on the inner wall of the airbag body 10 , or a preset opening of a circular, diamond or other preset shape.

[0052] The first baffle 21 and the second baffle 22 are a panel structure for covering the first air vent 11. The first baffle 21 and the second baffle 22 are arranged on the outer surface of the airbag body 10, that is, on the outer wall of the airbag body 10. The first side of the first baffle 21 is fixed to the first side of the first air vent 11, and the first side of the second baffle 22 is fixed to the second side of the first air vent 11. Among them, the first side and the second side of the first air vent 11 are different positions around the first air vent 11. Preferably, they are distributed on opposite sides of the first air vent 11, so that the first baffle 21 and the second baffle 22 are arranged opposite to each other at 180 degrees. Of course, the first side and the second side of the first air vent 11 can also be set to other relative orientations, such as being set at an angle of 90 degrees, 135 degrees, etc., which is not limited here.

[0053] The second side of the first baffle 21 and the second side of the second baffle 22 are both connected to the drawstring 30; the drawstring 30 extends from the first air release port 11 into the inner cavity of the airbag body 10, and the first end thereof is connected to the drawstring reactor 40. The second side of the first baffle 21 refers to the other side opposite to the first side of the first baffle 21 in the length direction, but is not necessarily located at the other end of the first baffle 21, but may be located relatively close to the end; the second side of the second baffle 22 has a similar meaning.

[0054] The drawstring 30 is a flexible drawstring used to apply tension to the first baffle 21 and the second baffle 22. The first end of the drawstring 30 is connected to the drawstring reactor 40, so that the tension of the drawstring 30 on the first baffle 21 and the second baffle 22 comes from the inner cavity of the airbag body 10, that is, the first baffle 21 and the second baffle 22 are pulled from the inner cavity of the airbag body 10, thereby forcing the first baffle 21 and the second baffle 22 to cover the first air release port 11. When air release is required, the forced covering of the first baffle 21 and the second baffle 22 on the first air release port 11 can be released by simply loosening the drawstring 30, so that the first baffle 21 and the second baffle 22 can be automatically blown open by the air pressure impact, which can ensure both the simplicity of the structure and the smoothness of the switching process from closing to opening the first air release port 11.

[0055] In this embodiment, the second end of the drawstring 30 is fixedly connected to the first air vent 11 , and the length of the drawstring 30 is just enough to pull the first baffle 21 and the second baffle 22 to cover the first air vent 11 after the airbag body 10 is inflated.

[0056] There are many specific ways to connect the second side of the first baffle 21 and the second side of the second baffle 22 to the drawstring 30. A feasible implementation is as follows: Figure 3 , Figure 5 and Figure 6 As shown, a first drawstring hole 211 is provided on the second side of the first baffle 21, and a second drawstring hole 221 is provided on the second side of the second baffle 22; the drawstring 30 passes through the first drawstring hole 211 and the second drawstring hole 221, and can pull the first baffle 21 through the first drawstring hole 211, and pull the second baffle 22 through the second drawstring hole 221. The first drawstring hole 211 provided on the second side of the first baffle 21 and the second drawstring hole 221 provided on the second side of the second baffle 22 are both through holes for passing the drawstring 30, and the drawstring 30 passes through the first drawstring hole 211 and the second drawstring hole 221 and extends from the first air release port 11 into the inner cavity of the airbag body 10, so as to pull the first baffle 21 and the second baffle 22.

[0057] There are also many fixed positions of the second end of the belt 30 that is not connected to the belt reactor 40. For example, Figure 5 and Figure 6As shown, the second end of the drawstring 30 not connected to the drawstring reactor 40 can be fixed on the outer wall of the airbag body 10; or, the second end of the drawstring 30 not connected to the drawstring reactor 40 can also be fixed on the inner wall of the inner cavity of the airbag body 10.

[0058] When the fixing method of the drawstring 30 is different, the method of the drawstring 30 passing through the first drawstring hole 211 and the second drawstring hole 221 is also different. For example, when the second end of the drawstring 30 is fixed to the outer wall of the airbag body 10, the first end of the drawstring 30 can first pass through the first drawstring hole 211 and then through the second drawstring hole 221, so that when the first baffle 21 and the second baffle 22 overlap, the first baffle 21 is located on the outside and the second baffle 22 is located on the inside closer to the first air vent 11. Alternatively, the first end of the drawstring 30 can also first pass through the second drawstring hole 221 and then through the first drawstring hole 211, so that when the first baffle 21 and the second baffle 22 overlap, the second baffle 22 is located on the outside and the first baffle 21 is located on the inside closer to the first air vent 11. After the drawstring 30 passes through the first drawstring hole 211 and the second drawstring hole 221 , the end of the passed portion (ie, the second end) is fixed to the outer wall of the airbag body 10 , which can be achieved by sewing or other connection methods; there is no limitation here.

[0059] When the second end of the drawstring 30 is fixed on the inner wall of the inner cavity of the airbag body 10, the first end of the drawstring 30 first passes through the first vent 11, then passes through the first pair of first drawstring holes 211 and second drawstring holes 221, and then passes back to the first vent 11 from the second pair of second drawstring holes 221 and first drawstring holes 211, and then extends into the inner cavity of the airbag body 10 and is connected to the inner wall of the airbag body 10; the specific way of connecting to the inner wall of the airbag body 10 can be sewing; another possibility is that the second end of the drawstring 30 that is passed back can be directly led to the drawstring reactor 40 for fixing without being positioned on the inner wall of the airbag body 10. If this method is adopted, a shear structure is used between the drawstring 30 and the drawstring reactor 40 to realize the release of the drawstring 30, as described later. In addition, in the above embodiment, when the first baffle 21 and the second baffle 22 overlap, the inner and outer positional relationship between the two is not restricted.

[0060] In addition, the second end of the drawstring 30 can be connected to the outer wall and the inner wall of the airbag body 10, or fixedly connected to the first baffle 21 or the second baffle 22, and the inner and outer positional relationship is not limited when the first baffle 21 and the second baffle 22 overlap. In addition, when the drawstring 30 is fixedly connected to the first baffle 21, the first drawstring hole 211 can be set or not. When the drawstring 30 is fixedly connected to the second baffle 22, the second drawstring hole 221 can be set or not.

[0061] A specific example is Figure 7 and Figure 8 As shown, Figure 7 It is a schematic diagram of a state in which the second end of a drawstring of an airbag provided in an embodiment of the present application is fixed on a first baffle and the drawstring reactor is in a tensioned state. Figure 8 The second end of the drawstring of the airbag provided in the embodiment of the present application is fixed on the first baffle and the drawstring reactor and the drawstring are in the released state. The second end of the drawstring 30 opposite to the first end is fixed on the first baffle 21, and the drawstring 30 passes through the second drawstring hole 221 on the second side of the second baffle 22 from the second end, and then extends into the inner cavity of the airbag body 10 from the first vent 11.

[0062] or, as Fig. 9 As shown, Fig. 9 It is a schematic diagram of the state of the drawstring reactor and the drawstring when the second end of the drawstring of an airbag provided by an embodiment of the present application is fixed on the second baffle and the drawstring reactor is in a released state. The second end of the drawstring 30 opposite to the first end is fixed on the second baffle 22. The drawstring 30 passes through the first drawstring hole 211 on the second side of the first baffle 21 from the second end, and then extends into the inner cavity of the airbag body 10 from the first air release port 11. In the above scheme, the connection method of the drawstring 30 and the first baffle 21 or the second baffle 22 can be sewing or the like.

[0063] When the drawstring 30 passes through the drawstring hole and pulls the baffle, the expansion effect of the baffle will be affected by gravity, thereby affecting the effect of the baffle covering the vent hole. Therefore, in a preferred embodiment, if the first baffle 21 and the second baffle 22 are arranged up and down along the direction of gravity, the second end of the drawstring 30 is preferably fixed to the baffle located below. For example, Fig. 9 As shown, in the direction of gravity, when the first baffle 21 is located above the second baffle 22, the second end of the drawstring 30 is preferably fixed on the second baffle 22. In this way, the drawstring 30 passes through the first drawstring hole 211 from bottom to top, and then extends into the inner cavity of the airbag body 10 from the first air vent 11. For the first baffle 21 and the second baffle 22, the pulling force from the drawstring 30 on the first baffle 21 will completely overcome the gravity so that the first baffle 21 has enough force to fully unfold, and the second drawstring hole 221 of the second baffle 22 is pulled by the drawstring 22, so that the second baffle 22 can also be fully unfolded under the action of tension and gravity, thereby ensuring that the first baffle 21 and the second baffle 22 can better cover the first air vent 11.

[0064] In addition, the number of the first drawstring hole 211 and the second drawstring hole 221 can be one or more, as long as the first baffle 21 and the second baffle 22 can cover the first air release port 11 after the drawn drawstring 30 is pulled. In addition, the drawstring 30 can be one or more, which is not limited here.

[0065] A possible implementation method is as follows Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the first drawstring hole 211 and the second drawstring hole 221 can be set to two. Wherein, when the first drawstring hole 211 and the second drawstring hole 221 are set at the same time, it can be as follows Figure 5 and Figure 6 As shown, through the corresponding positional relationship, two pairs of corresponding first draw strap holes 211 and second draw strap holes 221 are formed, namely, a first pair of first draw strap holes 211 and second draw strap holes 221, and a second pair of first draw strap holes 211 and second draw strap holes 221; when the draw strap reactor 40 is in a tensioned state and the first baffle 21 and the second baffle 22 are partially overlapped, the corresponding first draw strap holes 211 and second draw strap holes 221 overlap each other.

[0066] That is to say, two pairs of drawstring holes can be set at the second end of the first baffle 21 and the second end of the second baffle 22, and the drawstring 30 can be respectively passed through the two pairs of drawstring holes, so that the first baffle 21 and the second baffle 22 can be subjected to two pulling forces at the same time, thereby ensuring that the first baffle 21 and the second baffle 22 overlap and combine more tightly, thereby ensuring the covering effect of the first baffle 21 and the second baffle 22 on the first air vent 11.

[0067] When the drawstring 30 is provided as one strip, different sections of the drawstring 30 can be used to achieve different insertions of the first drawstring holes 211 and the second drawstring holes 221 .

[0068] In one embodiment, the drawstring 30 includes a first drawstring section and a second drawstring section, the first drawstring section passes through a pair of first drawstring holes 211 and second drawstring holes 221 , and the second drawstring section passes through another pair of first drawstring holes 211 and second drawstring holes 221 .

[0069] Another embodiment may be that the drawstring 30 includes a first drawstring section, a second drawstring section and a third drawstring section, the first drawstring section passes through a first pair of first drawstring holes 211 and second drawstring holes 221, the second drawstring section passes through a second pair of first drawstring holes 211 and second drawstring holes 221, and the third drawstring section is arranged in the inner cavity of the airbag body 10, one end of which is respectively connected to the first drawstring section and the second drawstring section, and the other end of which serves as the first end of the drawstring 30 connected to the drawstring reactor 40.

[0070] The drawstring reactor 40 is a device for tightening or loosening the drawstring 30, and has a tightening state and a releasing state, which can be switched by electric control. The tightening state refers to the state in which the drawstring reactor 40 tightens the drawstring 30 so as to pull the first baffle 21 and the second baffle 22 to cover the first air vent 11, and the releasing state refers to the state in which the drawstring reactor 40 loosens the drawstring 30 so that the first baffle 21 and the second baffle 22 can be blown open.

[0071] The drawstring reactor 40 can be used in conjunction with a detection device, so that when the detection device detects that the passenger is light or has an incorrect sitting posture, the drawstring reactor 40 is controlled to be in a released state; when the detection device detects that the passenger is of normal weight or has a normal sitting posture, the drawstring reactor 40 is controlled to be in a tightened state.

[0072] 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.

[0073] When the detection device detects that the passenger has a normal weight or a normal sitting posture, the drawstring reactor 40 is in a tensioned state, and the drawstring 30 is pulled, so that the first baffle 21 and the second baffle 22 partially overlap and cover the first air release port 11 under the action of the drawstring 30. When the detection device detects that the passenger has a light weight or an incorrect sitting posture, the drawstring reactor 40 is in a released state, and the drawstring reactor 40 loosens the drawstring 30, so that the first baffle 21 and the second baffle 22 covering the first air release port 11 can be blown open under the impact of the air pressure in the inner cavity of the airbag body 10. When the first baffle 21 and the second baffle 22 are blown open, the first baffle 21 and the second baffle 22 move away from each other under the impact of the gas, and the first drawstring hole 211 and the second drawstring hole 221 pulled together by the drawstring 30 also move away from each other, realizing the process of untying the drawstring 30 and exposing the first air release port 11.

[0074] In a specific embodiment, there are many installation positions for the pull belt reactor 40. It can be installed together with the gas releaser or set at other positions. It only needs to make the pull belt 30 pull the first baffle 21 and the second baffle 22 from the inner cavity of the airbag body 10.

[0075] There are many ways to set up the belt reactor 40. One feasible way to set up the belt reactor 40 is as follows: Figure 5 and Figure 6As shown, a rotatable winding mechanism 41 is provided on the belt reactor 40, and the first end of the belt 30 is wound around the winding mechanism 41; when the belt reactor 40 is in a tensioned state, the winding mechanism 41 is locked and cannot rotate, and when the belt reactor 40 is in a released state, the winding mechanism 41 is unlocked and can rotate.

[0076] This type of belt reactor 40 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 40 is in a tensioned state, the electromagnetic coil is energized, the electromagnetic brake pad is braked, and the winding mechanism 41 cannot rotate due to the action of the brake pad; when the belt reactor 40 is in a released state, the electromagnetic brake pad is loosened due to power failure, and the winding mechanism 41 can rotate freely because the brake pad does not work.

[0077] In the belt reactor 40 of this mechanism, the winding mechanism 41 can be a rotatable cylindrical structure. When the belt reactor 40 is in a tensioned state, the winding mechanism 41 is stuck, and a part of the belt 30 is wound around the winding mechanism 41, so that the belt 30 maintains the force on the first baffle 21 and the second baffle 22, so that the first baffle 21 and the second baffle 22 always overlap and cover the first air release port 11. When the belt reactor 40 is switched from a tensioned state to a released state, the winding mechanism 41 becomes rotatable, and the part of the belt 30 wound around the winding mechanism 41 can be pulled away, so that the belt 30 can be pulled out from the first air release port 11, so that the first baffle 21 and the second baffle 22 are no longer restricted by the belt 30, so that the first baffle 21 and the second baffle 22 can be blown open under the impact of air pressure.

[0078] In another feasible mechanism setting mode, a shearing mechanism is provided on the pulling belt reactor 40, and the first end of the pulling belt 30 is fixedly connected to the pulling belt reactor 40 through the shearing mechanism; when the pulling belt reactor 40 is in a tensioned state, the shearing mechanism does not perform a shearing action; when the pulling belt reactor 40 is in a released state, the shearing mechanism performs a shearing action, cutting the pulling belt 30 at a position close to the first end of the pulling belt 30, so that the pulling belt 30 is loosened.

[0079] In the pull belt reactor 40 of this mechanism, when the pull belt 30 is in a tensioned state, the pull belt 30 is fixedly connected to the pull belt reactor 40 and always provides tension to the first baffle 21 and the second baffle 22, so that the first baffle 21 and the second baffle 22 always overlap and cover the first air release port 11. When the pull belt 30 is switched from a tensioned state to a released state, the pull belt 30 is cut by the shearing mechanism, and the first baffle 21 and the second baffle 22 are no longer restricted by the pull belt 30, so that the first baffle 21 and the second baffle 22 can be blown open under air pressure inflation. The above-mentioned shearing structure can be adopted in different ways. For example, the pull belt 30 passes through a shearing opening, one end of which is set on a telescopic rod that can be extended. When the telescopic rod retracts under the action of electromagnetic force, the blade edge relative to the shearing opening is reduced and overlapped, and the pull belt 30 passing therethrough is shortened, and the shearing action is performed.

[0080] In addition, in this embodiment, in addition to the first air release port 11, a second air release port, a third air release port and other air release ports may be provided to release air to enhance the air release effect. The following is further described by taking the second air release port as an example.

[0081] The specific implementation of setting the second air release port can be that a second air release port is also provided on the airbag wall of the airbag body 10; a third baffle and a fourth baffle located at the second air release port are provided on the outer surface of the airbag body 10; a first side of the third baffle is fixed on the first side of the second air release port, and a first side of the third baffle is fixed on the second side of the second air release port; a second side of the third baffle and a second side of the fourth baffle are both connected to another drawstring; the drawstring extends from the second air release port into the inner cavity of the airbag body 10, and a first end thereof is connected to the drawstring reactor 40.

[0082] In this embodiment, the second air vent is similar to the first air vent 11 in terms of its configuration, and can be specifically analogous to the configuration of the first air vent 11, which will not be described in detail here. In addition, the size, shape, etc. of the second air vent can be completely the same as the first air vent 11, or can be different from the first air vent 11. The configuration of the drawstring at the second air vent can also be analogous to the configuration of the drawstring 30, which will not be described in detail here.

[0083] In the safety airbag provided in the above embodiment, the airbag body 10 is provided with a first air release port 11 on the airbag wall, the airbag body 10 is provided with a first air release port 11, and the outer surface of the airbag body 10 is provided with a first baffle 21 and a second baffle 22 which can partially overlap, and are controlled by a drawstring 30. When the airbag body 10 is inflated, the passenger can be detected by the detection device. If the passenger is light in weight or has an incorrect sitting posture, the drawstring reactor is controlled to loosen the drawstring, so that the first baffle 21 and the second baffle 22 can release the cover of the first air release port 11, so that the gas can be released from the first air release port 11, thereby reducing the air pressure in the inner cavity of the airbag body 10, reducing the impact on the passenger when the airbag body 10 is deployed, and avoiding the injury to the passenger with light weight or incorrect sitting posture when the safety airbag is deployed. The airbag wall will not squeeze the human body, thereby avoiding the long-term blocking of the mouth and nose of the human body by the airbag wall, so that the passenger's breathing is no longer blocked, thereby improving the protection effect of the safety airbag. At the same time, since the drawstring 30 directly extends into the inner cavity of the airbag from the air vent, when the drawstring 30 pulls the first baffle 21 and the second baffle 22 to cover the first air vent 11, the gas in the airbag body 10 will basically not escape, thereby ensuring the inflation efficiency of the airbag while avoiding injuries to passengers with light weight or improper sitting posture when the airbag is deployed.

[0084] It should be noted that no matter how many air vents are set, the locations of the air vents must be reasonable; specifically, the air vents should not be set in positions where they will be pressed by passengers when the airbag is working, so as to avoid the air vents themselves being blocked by the passenger's body.

[0085] The first embodiment above describes the safety airbag. Correspondingly, the second embodiment below provides a car including any feasible safety airbag in the first embodiment above, as follows.

[0086] This embodiment provides a car, wherein the safety airbag of the car comprises: an airbag body and a pull belt reactor;

[0087] A first air leakage port is arranged on the airbag wall of the airbag body; a first baffle and a second baffle are arranged on the outer surface of the airbag body and are located at the first air leakage port; a first side of the first baffle is fixed to a first side of the first air leakage port, and a first side of the second baffle is fixed to a second side of the first air leakage port;

[0088] A first drawstring hole is provided on the second side of the first baffle, and a second drawstring hole is provided on the second side of the second baffle; the drawstring passes through the first drawstring hole and the second drawstring hole, and can pull the first baffle through the first drawstring hole, and pull the second baffle through the second drawstring hole; the drawstring extends from the first air release port into the inner cavity of the airbag body, and the first end of the drawstring is connected to the drawstring reactor;

[0089] When the drawstring reactor is in a tensioned state, the drawstring is pulled, so that the first baffle and the second baffle are partially overlapped and cover the first air vent under the action of the drawstring; when the drawstring reactor is in a released state, the drawstring reactor loosens the drawstring, so that the first baffle and the second baffle covering the first air vent can be blown open under the impact of the air pressure in the inner cavity of the airbag body.

[0090] The specific implementation of the airbag in this embodiment is similar to that of the airbag in the first embodiment. Please refer to the relevant contents of the first embodiment for details, and no unnecessary details will be given here.

[0091] 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.

[0092] 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.

[0093] 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 and a pull belt reactor; A first air release port is provided on the air bag wall of the air bag body; A first baffle and a second baffle are provided on the outer surface of the airbag body and are located at the first air leakage port; a first side of the first baffle is fixed to a first side of the first air leakage port, and a first side of the second baffle is fixed to a second side of the first air leakage port; The second side of the first baffle and the second side of the second baffle are both connected to a drawstring; the drawstring extends from the first air release port into the inner cavity of the airbag body, and a first end of the drawstring is connected to the drawstring reactor; When the drawstring reactor is in a tensioned state, the drawstring is pulled, so that the first baffle and the second baffle are partially overlapped and cover the first air vent under the action of the drawstring; when the drawstring reactor is in a released state, the drawstring reactor loosens the drawstring, so that the first baffle and the second baffle covering the first air vent can be blown open under the impact of air pressure in the inner cavity of the airbag body.

2. The airbag according to claim 1, characterized in that: The second end of the drawstring that is not connected to the drawstring reactor is fixed to the outer wall of the airbag body; Alternatively, the second end of the drawstring that is not connected to the drawstring reactor is fixed to the inner wall of the inner cavity of the airbag body.

3. The airbag according to claim 1, characterized in that: The second end of the drawstring opposite to the first end is fixed on the first baffle, and the drawstring starts from the second end, passes through the second drawstring hole on the second side of the second baffle, and then extends into the inner cavity of the airbag body from the first air release port; Alternatively, a second end of the drawstring opposite to the first end is fixed on the second baffle, and the drawstring extends from the second end through a first drawstring hole on the second side of the first baffle and then extends into the inner cavity of the airbag body from the first air release port.

4. The airbag according to claim 1, characterized in that: A first drawstring hole is provided on the second side of the first baffle, and a second drawstring hole is provided on the second side of the second baffle; the drawstring passes through the first drawstring hole and the second drawstring hole, and can pull the first baffle through the first drawstring hole, and pull the second baffle through the second drawstring hole.

5. The airbag according to claim 4, characterized in that: The number of the first drawstring hole and the number of the second drawstring hole are both two, and two pairs of the first drawstring hole and the second drawstring hole corresponding to each other are formed through corresponding positional relationships; The drawstring reactor is in a tensioned state, and when the first baffle and the second baffle are partially overlapped, the first drawstring hole and the second drawstring hole corresponding to each other are overlapped with each other.

6. The airbag according to claim 5, characterized in that: The drawstring includes a first drawstring section and a second drawstring section. The first drawstring section passes through a pair of first drawstring holes and a second drawstring hole, and the second drawstring section passes through another pair of first drawstring holes and a second drawstring hole.

7. The airbag according to claim 6, characterized in that: The drawstring also includes a third drawstring, which is arranged in the inner cavity of the airbag body, one end of which is respectively connected to the first drawstring and the second drawstring, and the other end of which serves as the first end of the drawstring connected to the drawstring reactor.

8. The airbag according to claim 1, characterized in that: A second air release port is also provided on the air bag wall of the air bag body; A third baffle and a fourth baffle located at the second air leakage port are provided on the outer surface of the airbag body; a first side of the third baffle is fixed to a first side of the second air leakage port, and a first side of the third baffle is fixed to a second side of the second air leakage port; The second side of the third baffle and the second side of the fourth baffle are both connected to another drawstring; the drawstring extends from the second air release port into the inner cavity of the airbag body, and a first end of the drawstring is connected to the drawstring reactor.

9. The airbag according to claim 1, characterized in that: The belt reactor is provided with a rotatable winding mechanism, and the first end of the belt is wound on the winding mechanism; when the belt reactor is in a tensioned state, the winding mechanism is locked and cannot rotate, and when the belt reactor is in a released state, the winding mechanism is unlocked and can rotate.

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

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