Airbag, airbag device, and safety seat

Abstract

The invention discloses a safety air bag, a safety air bag device and a safety seat. The safety air bag is provided with an inflation state and a folding device. The safety air bag comprises a bag body and an air inlet channel. The bag body is provided with a bag cavity, an air bag air inlet communicated with the bag cavity and a separation part for separating the bag cavity; a first cavity and a second cavity are formed in the two sides of the separation part respectively; the air inlet channel is communicated with the first cavity and the second cavity; the first cavity is communicated with the air inlet of the air bag, and the second cavity is communicated with the air inlet of the air bag through the first cavity, so that the first cavity and the second cavity are sequentially expanded in an inflation state. According to the technical scheme, the possibility that passengers are injured when the safety air bag is started can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of children's products, and particularly relates to an airbag, an airbag device and a safety seat. Background Art

[0002] At present, more and more car safety seats are equipped with airbag devices to protect the passengers by inflating the airbag devices when a car collision occurs. However, in the start-up process of the related airbag devices, they are inflated and deployed instantaneously. At this time, a relatively large deployment impact force is easily generated, which may cause risks of injury to the passengers. Summary of the Invention

[0003] The main purpose of the present invention is to provide an airbag, aiming to reduce the possibility of injury to the passengers during start-up.

[0004] To achieve the above purpose, the airbag proposed by the present invention has an inflated state and a folded state, and includes:

[0005] A bladder body having a bladder cavity, an airbag air inlet communicating with the bladder cavity, and a partition portion separating the bladder cavity; a first cavity and a second cavity are respectively formed on both sides of the partition portion; and an air inlet channel communicating the first cavity and the second cavity;

[0006] The first cavity communicates with the airbag air inlet, and the second cavity communicates with the airbag air inlet through the first cavity, so that in the inflated state, the first cavity and the second cavity are deployed in sequence.

[0007] Optionally, the first cavity and the second cavity are arranged as a whole along a first direction; in the first direction, the bladder body has a corresponding air inlet end and a fixed end, the airbag air inlet is located at the air inlet end, the first cavity is located closer to the air inlet end relative to the second cavity, and the second cavity is located closer to the fixed end relative to the first cavity;

[0008] Part of the partition portion extends along the first direction to separate the first cavity and the second cavity in the inflated state, so that the first cavity and the second cavity in the inflated state can be juxtaposed and close to each other.

[0009] Optionally, the length of the partition portion extending along the first direction is not less than 0.5 cm.

[0010] Optionally, the length of the partition portion extending along the first direction is between 1 - 5 cm.

[0011] Optionally, in a second direction perpendicular to the first direction, the separating portion is relatively located in the middle of the bladder body, and there are two air inlet channels symmetrically arranged on both sides of the separating portion;

[0012] Or, there are multiple separating portions, and the multiple separating portions are arranged as a whole in a second direction perpendicular to the first direction, and an air inlet channel is formed between two adjacent separating portions.

[0013] Optionally, in the first direction, the distance between the separating portion and the fixed end is greater than the distance between the separating portion and the air inlet end.

[0014] Optionally, the separating portion is a suture line provided on the bladder body, and the suture line connects and fixes the two inner walls of the bladder cavity, and the suture line extends as a whole along an ellipse.

[0015] Optionally, a fixed mounting portion is provided on one side of the bladder body close to the fixed end, a restraint suture line is provided at a position of the bladder body close to the fixed mounting portion, the fixed mounting portion is located between the restraint suture line and the fixed end, and the restraint suture line connects and fixes the two inner walls of the bladder cavity so that the position of the restraint suture line is flat in the inflated state.

[0016] The present invention also provides an airbag device, including:

[0017] An airbag box having a receiving cavity and a receiving cavity opening exposing the receiving cavity outward;

[0018] The airbag bag as described above; and

[0019] An inflation unit communicating with the airbag air inlet to inflate the airbag bag;

[0020] In the folded state, a part of the airbag bag is received in the receiving cavity;

[0021] In the inflated state, at least part of the airbag bag received in the receiving cavity expands and extends outward from the receiving cavity opening.

[0022] Optionally, the bladder body has corresponding air inlet end and fixed end, the airbag air inlet is located at the air inlet end, the first cavity is relatively located at a position close to the air inlet end with respect to the second cavity, and the second cavity is relatively located at a position close to the fixed end with respect to the first cavity; the fixed end is fixed outside the airbag box, and the air inlet end is located in the receiving cavity; in the folded state, the bladder body surrounding the first cavity is entirely located in the receiving cavity, and at least part of the bladder body surrounding the second cavity is located outside the receiving cavity.

[0023] Optionally, the airbag box has a front side wall and a rear side wall arranged opposite to each other. In the folded state, the airbag body exposed outside the accommodation cavity is located on the side where the rear side wall is located;

[0024] In the inflated state, the entire inflated first cavity is located above the airbag box, the entire inflated second cavity is located on the side where the rear side wall is located, and a part of the second cavity extends upward to be arranged side by side with the second cavity.

[0025] Optionally, in the inflated state, the partition part is entirely located above the airbag box and on the side where the rear side wall is located;

[0026] The partition part, a part of the airbag body enclosing the first cavity, and a part of the airbag body enclosing the second cavity form a bearing surface for bearing a child's head.

[0027] Optionally, the airbag box has a box body and a support body arranged below the box body. The accommodation cavity is arranged in the box body, and the inflation unit includes a gas cylinder arranged in the support body.

[0028] The present invention also provides a safety seat, comprising:

[0029] a seat body, and

[0030] the airbag device as described above, wherein the airbag box of the airbag device is connected to the seat body and is located in front of the seat body, or at least one of the left and right sides of the seat body.

[0031] In the technical solution of the present invention, the airbag of the airbag is divided into a first cavity and a second cavity by a partition part. The first cavity is communicated with the airbag inlet of the airbag, the second cavity is communicated with the first cavity through an air inlet channel, and further communicated with the airbag inlet through the first cavity, so that when the airbag is inflated, the first cavity and the second cavity can be deployed in sequence. That is, the first cavity is filled first, and then the second cavity is filled. At this time, it is possible to avoid the airbag being inflated instantaneously as a whole and generating a large impact force on the passengers, thereby reducing the possibility of the airbag causing harm to the passengers when starting. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0033] Figure 1Schematic diagram of the structure of an embodiment of the child safety seat of the present invention;

[0034] Figure 2 is Figure 1 Schematic diagram of the child safety seat with the airbag in the inflated state;

[0035] Figure 3 is Figure 2 Schematic diagram of one perspective of the airbag device;

[0036] Figure 4 is Figure 3 Schematic cross-sectional view of the airbag device;

[0037] Figure 5 Explosion structure diagram of the airbag and the inflator unit of the airbag device of the present invention;

[0038] Figure 6 Assembly diagram of the airbag, the inflator unit and the airbag housing of the airbag device of the present invention;

[0039] Figure 7 is Figure 6 Schematic diagram of the distribution of the folding lines of the airbag;

[0040] Figure 8 is Figure 7 Schematic diagram of the folded airbag;

[0041] Figure 9 is Figure 8 Schematic diagram of the fixed end of the airbag fixed to the airbag housing;

[0042] Figure 10 is Figure 9 Schematic diagram of one fold of the airbag;

[0043] Figure 11 is Figure 10 Schematic diagram of one winding of the airbag;

[0044] Figure 12 is Figure 11 Schematic diagram of another winding of the airbag.

[0045] Explanation of the reference numerals in the drawings:

[0046] 100, Safety seat; 30, Seat body; 10, Airbag device; 11, Airbag box; 111, Accommodating cavity; 112, Opening of the accommodating cavity; 113, Front side wall; 114, Rear side wall; 115, Box body; 116, Support body; 13, Inflation unit; 131, Gas cylinder; 131a, Gas cylinder outlet; 15, Airbag; 150, Bladder body; 1501, Bladder cavity; 1503, Intake channel; 151, Intake end; 151a, Airbag inlet; 152, Fixed end; 152a, Fixed mounting portion; 153, Partition portion; 1531, Suture; 154, First cavity; 155, Second cavity; 15a, Restraint suture; 15b, Primary folding line; 15c, Secondary folding line; 156, First winding portion; 157, Second winding portion; 159, Bearing surface; 17, Wrapping sleeve; 18, First clamping member; 19, Second clamping member.

[0047] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0049] It should be noted that all the directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0050] In the present application, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0051] In addition, the descriptions involving "first", "second", etc. in this application are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions results in contradictions or cannot be achieved, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0052] Please refer to Figure 1 and Figure 2 , this application proposes an airbag device 10, which can be applied to a safety seat 100.

[0053] In an embodiment of this application, the safety seat 100 may include a seat body 30 and an airbag device 10. Among them, the seat body 30 can be installed in a vehicle or other means of transportation for a passenger to sit. And the airbag device 10 can be arranged on the seat body 30 to be activated when a collision accident occurs in a vehicle or other means of transportation to protect the passenger.

[0054] Furthermore, when the installed seat 100 is in a normal use and placement state, it can be defined that the seat body 30 has a front-rear direction. Among them, the side of the seat body 30 facing the passenger is the front side. At this time, the airbag device 10 can be arranged on the front side of the seat body 30. Of course, in some embodiments, the airbag device 10 can also be arranged on at least one of the left and right sides of the seat body 30. It can be seen that this application does not limit the installation method of the airbag device 10 on the seat body 30.

[0055] Please refer to Figure 3 , Figure 4 and Figure 9 , in an embodiment of this application, the airbag device 10 may include an airbag box 11, an inflation unit 13, and an airbag 15; the airbag box 11 has a receiving cavity 111 and a receiving cavity opening 112 exposing the receiving cavity 111 to the outside; the airbag 15 has a folded state, and in the folded state, part of the airbag 15 is received in the receiving cavity 111; the inflation unit 13 is communicated with the airbag 15 to inflate the airbag 15.

[0056] The airbag housing 11 can be used to form a receiving cavity 111 to accommodate the inflating unit 13 and the airbag 15, so that the airbag device 10 can be assembled into a whole. At the same time, the airbag housing 11 can also be used to connect with the seat body 30 introduced above to realize the installation of the airbag device 10 on the seat body 30. Among them, in order to facilitate assembly and the inflation and extension of the airbag 15, the opening 112 of the receiving cavity of the airbag housing 11 can be arranged at the upper end of the airbag housing 11 and face upward, and the lower end of the airbag housing 11 can be fixedly connected to the seat body 30. Of course, it can also be rotatably connected to the seat body 30 around a rotation axis parallel to the left-right direction. In addition, in other embodiments, the inflating unit 13 may not be installed in the receiving cavity 111, may be arranged outside the airbag housing 11, or may be arranged on the seat body 30.

[0057] The inflating unit 13 can be used to inflate the airbag 15 so that the airbag 15 can also be in an inflated state. Among them, in order to simplify the structure of the inflating unit 13 and improve the convenience of its arrangement, the inflating unit 13 can include a gas cylinder 131. The gas cylinder 131 can be used to store high-pressure gas, and the gas outlet 131a of the gas cylinder 131 has an open state and a closed state. Among them, when a vehicle or other means of transportation does not have a collision accident, the gas outlet 131a of the gas cylinder can be closed to enclose the high-pressure gas in the gas cylinder 131. When a vehicle or other means of transportation has a collision accident, the gas outlet 131a of the gas cylinder can be opened so that the high-pressure gas can be ejected from the gas outlet 131a to inflate the airbag 15. Among them, in order to facilitate assembly and improve the structural compactness, the gas cylinder 131 can be arranged to extend in the up-down direction, and the gas outlet 131a of the gas cylinder can be arranged at the upper end of the gas cylinder 131.

[0058] The airbag 15. When in an inflated state, at least part of the airbag 15 received in the receiving cavity 111 can expand and extend outward through the opening 112 of the receiving cavity, so as to realize the protection of the occupants.

[0059] Please refer to Figures 3 to 6 , in an embodiment of the present application, the airbag 15 includes a bladder 150 and an air inlet passage 1503. The bladder 150 has a bladder cavity 1501, an airbag air inlet 151a communicating with the bladder cavity 1501, and a partition 153 separating the bladder cavity 1501. On both sides of the partition 153, a first cavity 154 and a second cavity 155 are respectively formed. The air inlet passage 1503 communicates the first cavity 154 and the second cavity 155. The first cavity 154 communicates with the airbag air inlet 151a, and the second cavity 155 communicates with the airbag air inlet 151a through the first cavity 154, so that when in an inflated state, the first cavity 154 and the second cavity 155 are unfolded in sequence.

[0060] The partition 153 can separate the bladder cavity 1501 into a first cavity 154 and a second cavity 155 which are sequentially arranged along the flow direction of the inflation airflow, so that when the inflation unit 13 inflates the airbag 15, the first cavity 154 can be inflated first, and then the second cavity 155 can be inflated in sequence, thereby achieving sequential inflation of the first cavity 154 and the second cavity 155. The partition 153 can be formed by a suture 1531 arranged on the bladder body 150 as described below, or can be formed by an adhesive layer arranged in the bladder body 150. The present application does not limit the structural form of the partition 153, and it only needs to be able to separate the bladder cavity 1501.

[0061] The airbag bag 15 of the technical solution of the present invention divides the bag cavity 1501 into a first cavity 154 and a second cavity 155 through a partition 153, and the first cavity 154 is connected to the airbag air inlet 151a of the airbag bag 15, and the second cavity 155 is connected to the first cavity 154 through the air inlet channel 1503, and further connected to the airbag air inlet 151a through the first cavity 154, so that when the airbag bag 15 is inflated, the first cavity 154 and the second cavity 155 can be deployed in sequence. That is, the first cavity 154 is filled first, and then the second cavity 155 is filled. At this time, it can be avoided that the airbag bag 15 is instantly inflated as a whole and generates a large impact force on the passengers, thereby reducing the possibility of the airbag bag 15 causing harm to the passengers when it is activated.

[0062] Please refer to Figures 4 to 6 In one embodiment of the present application, the first cavity 154 and the second cavity 155 are arranged as a whole along the first direction; in the first direction, the bag 150 has a corresponding air inlet end 151 and a fixed end 152, the airbag air inlet port 151a is located at the air inlet end 151, the first cavity 154 is located near the air inlet end 151 relative to the second cavity 155, and the second cavity 155 is located near the fixed end 152 relative to the first cavity 154; the partial partition 153 extends along the first direction to separate the first cavity 154 and the second cavity 155 in the inflated state, so that the first cavity 154 and the second cavity 155 in the inflated state can be side by side and close to each other.

[0063] In the deployed state, the airbag 15 may have a length direction and a width direction. Among them, the length direction may be the first direction, the width direction may be the second direction, and the air inlet end 151 and the fixed end 152 may be the two ends of the airbag 15 in the length direction respectively. Among them, the air inlet end 151 may be sleeved on one end of the gas cylinder 131 of the inflation unit 13 having the gas cylinder outlet 131a, and is clamped and fixed in cooperation with the gas cylinder 131 through a first clamping member 18 such as a clamp, so as to achieve a fast and stable connection between the air inlet end 151 and the gas cylinder 131. The fixed end 152 may be connected to the airbag box 11 through the fixed mounting portion 152a introduced below. In addition, in the direction from the middle part to the two ends of the airbag 15, the width dimensions of the air inlet end 151 and the fixed end 152 may be tapered, so as to facilitate the limit installation of the air inlet end 151 and the fixed end 152. Of course, the width dimensions of the air inlet end 151 and the fixed end 152 may also be equal to the width dimension of the middle part of the airbag 15.

[0064] In this embodiment, the first cavity 154 is arranged closer to the air inlet end 151 relative to the second cavity 155, and the second cavity 155 is arranged closer to the fixed end 152 relative to the first cavity 154, so that when the inflation unit 13 inflates the airbag 15, it is beneficial to improve the inflation effect of the first cavity 154 and the second cavity 155 in sequence. Further extending a part of the partition 153 along the first direction makes the first cavity 154 and the second cavity 155 in the inflated state be able to be juxtaposed and close to each other. At this time, when the opening 112 of the accommodating cavity of the airbag box 11 is arranged upward, the part of the bladder 150 that encloses to form the first cavity 154 can expand and unfold upward, and the part that encloses to form the second cavity 155 can expand and unfold backward and downward, so that the possibility of forming an unfolding impact on the head of the occupant can be reduced. Therefore, the shape formed after the airbag 15 is inflated and unfolded can better protect the occupant.

[0065] In an embodiment of the present application, the length of the partition 153 extending along the first direction is not less than 0.5 cm.

[0066] In this embodiment, setting the extension dimension of the partition 153 in the first direction to be not less than 0.5 cm can improve the juxtaposed and close effect of the first cavity 154 and the second cavity 155 in the inflated state.

[0067] Further, in order to take into account the size of the bladder cavity 1501 and the juxtaposed and approaching effect of the first cavity 154 and the second cavity 155 in the inflated state, the length of the partition portion 153 extending in the first direction is set to be between 1-5 cm. For example: 1 cm, 1.5 cm, 2 cm, 2.5 cm, 3 cm, 3.5 cm, 4 cm, 4.5 cm or 5 cm. Of course, it can also be any value within the above range.

[0068] Please refer to Figure 4 and Figure 5 , in an embodiment of the present application, in the second direction perpendicular to the first direction, the partition portion 153 is relatively located in the middle of the bladder 150, and two air inlet channels 1503 are provided and symmetrically arranged on both sides of the partition portion 153.

[0069] In this embodiment, the partition portion 153 is arranged in the middle of the bladder 150, which is convenient for dividing the bladder cavity 1501 to form the first cavity 154 and the second cavity 155 that meet the volume requirements. Further, air inlet channels 1503 are provided on both sides of the partition portion 153, which is beneficial to improving the uniformity of inflation on both sides of the bladder 150 in the width direction, so that the bladder 150 can be inflated and expanded uniformly to provide a more effective protection effect on the occupants.

[0070] Of course, the present application is not limited to this. In an embodiment of the present application, it is also possible that a plurality of partition portions 153 are provided, and the plurality of partition portions 153 are arranged as a whole in the second direction perpendicular to the first direction, and air inlet channels 1503 are formed between adjacent two partition portions 153.

[0071] Please refer to Figure 5 , in an embodiment of the present application, in the first direction, the distance between the partition portion 153 and the fixed end 152 is greater than the distance between the partition portion 153 and the air inlet end 151.

[0072] In this embodiment, the distance between the partition portion 153 and the fixed end 152 is set to be greater than the distance between the partition portion 153 and the air inlet end 151, so that the volume of the second cavity 155 can be greater than the volume of the first cavity 154. At this time, when the first cavity 154 is quickly filled and expanded, the volume of the first cavity 154 is relatively small and will not be too close to the occupants, especially the heads of the occupants, which is beneficial to reducing the possibility of impact injury to the occupants.

[0073] Please refer to Figure 5 , in an embodiment of the present application, the partition portion 153 is a suture line 1531 provided on the bladder 150, and the suture line 1531 connects and fixes the two inner walls of the bladder cavity 1501, and the suture line 1531 extends as a whole along an ellipse.

[0074] In this embodiment, the partition 153 is formed in the form of a suture 1531, so that the bladder 150 can be formed with a simple sewing process after manufacturing, thereby facilitating the processing of the partition 153. Furthermore, the suture 1531 is arranged to extend along an ellipse as a whole, so that the bladder 150 can form the first cavity 154 and the second cavity 155 on both sides of the partition 153 in the first direction, and form the air inlet channel 1503 on both sides of the partition 153 in the third direction as described above.

[0075] Please refer to Figure 4 and Figure 5 In one embodiment of the present application, a fixed mounting portion 152a is provided on one side of the sac body 150 near the fixed end 152, and a constraining suture 15a is provided at a position of the sac body 150 near the fixed mounting portion 152a. The fixed mounting portion 152a is located between the constraining suture 15a and the fixed end 152. The constraining suture 15a connects and fixes the two inner walls of the sac cavity 1501 so that the position of the constraining suture 15a is flat in the inflated state.

[0076] In this embodiment, the fixed mounting portion 152a can be used to connect and fix with the airbag box 11, so that after the airbag bag 15 is inflated, the first cavity 154 and the second cavity 155 form a parallel and close effect as described above. Furthermore, the setting of the restraining suture 15a allows the bottom of the second cavity 155 to be restrained, thereby reducing the downward transition and expansion of the part of the sac 150 that encloses the second cavity 155 and causes excessive squeezing of the occupants. Among them, the restraining suture 15a can be along an unclosed circular shape, and the opening formed can be set toward the fixed end 152, so that the sac 150 can be flat when it is expanded in this part. Of course, the restraining suture 15a can also be set in a circular shape or other shapes. In addition, the fixed mounting portion 152a can be in the form of a mounting hole, and the mounting hole is not connected to the sac cavity 1501 on the inner side of the airbag bag 15. At this time, please refer to Figures 5 to 9 The fixed end 152 can be sleeved on the outside of the airbag box 11 through the mounting hole from the lower end of the airbag box 11, and can be clamped and fixed with the airbag box 11 by the second clamping member 19 such as a clamp, so as to achieve fast and stable installation between the fixed end 152 and the airbag box 11.

[0077] Please refer to Figures 6 to 11 In one embodiment of the present application, the fixed end 152 is fixed outside the airbag box 11, and the air inlet end 151 is located in the accommodating cavity 111; in the folded state, the capsule 150 that encloses the first cavity 154 is located as a whole in the accommodating cavity 111, and the capsule 150 that encloses the second cavity 155 is at least partially located outside the accommodating cavity 111.

[0078] In this embodiment, the fixed end 152 is fixed to the outside of the airbag box 11. Specifically, it can be connected through the fixed mounting portion 152a as introduced above, which can improve the convenience of connecting the fixed end 152. Further, the entire bladder 150 enclosing the first cavity 154 is located within the accommodation cavity 111, and at least a part of the bladder 150 enclosing the second cavity 155 is located outside the accommodation cavity 111, so that the parts of the bladder 150 enclosing the first cavity 154 and the second cavity 155 can be conveniently extended and unfolded from the accommodation cavity opening 112 of the airbag box 11 after inflation.

[0079] Please refer to Figure 4 , and Figures 9 to 12 , in an embodiment of the present application, the airbag box 11 has a front side wall 113 and a rear side wall 114 arranged opposite to each other. In the folded state, the bladder 150 exposed outside the accommodation cavity 111 is located on the side where the rear side wall 114 is located; in the inflated state, the inflated first cavity 154 is entirely located above the airbag box 11, the inflated second cavity 155 is entirely located on the side where the rear side wall 114 is located, and a part of the second cavity 155 extends upward to be arranged side by side with the second cavity 155.

[0080] The front side wall 113 is the side wall of the airbag box 11 away from the occupant sitting on the seat body 30. The rear side wall 114 is the side wall of the airbag box 11 close to the occupant sitting on the seat body 30.

[0081] In this embodiment, the bladder 150 exposed outside the accommodation cavity 111 in the folded state is arranged on the side where the rear side wall 114 is located, so that the inflated second cavity 155 can face the side where the occupant sitting on the seat body 30 is located, thereby protecting the occupant. Further, in the inflated state, the inflated first cavity 154 is entirely located above the airbag box 11, the inflated second cavity 155 is entirely located on the side where the rear side wall 114 is located, and a part of the second cavity 155 extends upward to be arranged side by side with the second cavity 155, so that the first cavity 154 can expand and unfold upward, and the second cavity 155 can expand and unfold backward and downward, which is beneficial to reducing the impact injury to the head of the occupant caused by the airbag after inflation and expansion as introduced above.

[0082] Please refer to Figure 4 , in an embodiment of the present application, in the inflated state, the partition portion 153 is entirely located above the airbag box 11 and on the side where the rear side wall 114 is located; the partition portion 153, a part of the bladder 150 enclosing the first cavity 154, and a part of the bladder 150 enclosing the second cavity 155 form a receiving surface 159 for receiving the head of a child.

[0083] In this embodiment, in the inflated state, the whole of the partition portion 153 is located above the airbag box 11 and on the side where the rear side wall 114 is located, facilitating the formation of the first cavity 154 and the second cavity 155 in a side-by-side and close-together form in the front-rear direction as introduced above. Moreover, at this time, an outwardly convex arc-shaped receiving surface 159 can be formed by the partition portion 153, a part of the bladder 150 enclosing the first cavity 154, and a part of the bladder 150 enclosing the second cavity 155, so as to effectively receive and protect the head of a child by the receiving surface 159.

[0084] Please refer to Figure 4 , in an embodiment of the present application, the airbag box 11 has a box body 115 and a support body 116 provided below the box body 115. The accommodation cavity 111 is provided in the box body 115, and the gas cylinder 131 in the inflation unit 13 is provided in the support body 116.

[0085] In this embodiment, the airbag box 11 is provided to include the box body 115 and the support body 116, so that the accommodation cavity 111 structure can be conveniently formed through the box body 115, and the fixed installation portion 152a can be conveniently sleeved and installed from bottom to top as introduced above through the support body 116. At the same time, the support body 116 can also provide an installation position for the gas cylinder 131 in the inflation unit 13, so that the gas cylinder 131 can be tightly and stably installed on the airbag box 11.

[0086] Please refer to in combination Figures 5 to 12, in an embodiment of the present application, the folding and assembling and accommodating manner of the airbag 15 may be as follows: the left side portion of the airbag 15 is first folded towards the right along the first folding line 15b, and then it is continuously folded towards the left along the second folding line 15c for the second folding. At this time, the first folding line 15b intersects the second folding line 15c away from the center line of the airbag 15. Similarly, the same operation can be performed on the right side portion of the airbag 15. That is, the right side portion of the airbag 15 is first folded towards the left along the first folding line 15b, and then it is continuously folded towards the right along the second folding line 15c for the second folding. In this way, the preliminary folding of the airbag 15 in the left-right direction can be completed. After that, the fixed end 152 of the airbag 15 can be sleeved upward from the lower end of the airbag box 11 through the fixed mounting portion 152a in the form of a mounting hole, and clamped and fixed by a second clamping member 19 such as a clamp. Then, the airbag 15 can be folded backward in the front-rear direction to form a first winding portion 156 and a second winding portion 157; the winding length of the first winding portion 156 is greater than the winding length of the second winding portion 157. At this time, the first winding portion 156 can be folded backward and wound to complete the first winding. After that, the second winding portion 157 can be folded forward and attached above the first winding portion 156, and drive the first winding portion 156 to be folded forward and wound, so that the first winding portion 156 and the second winding portion 157 are accommodated in the accommodation cavity 111 and located above the gas cylinder 131 to complete the second winding. Finally, the wrapping sleeve 17 can be sleeved outside the airbag box 11 to cover the opening 112 of the accommodation cavity. At this time, by adopting the above folding and accommodating manner, the volume of the airbag 15 can be made smaller after folding, which is convenient for accommodation. Moreover, the inflation sequence in which the first cavity 154 and the second cavity 155 in the airbag 15 are filled in sequence can be better controlled, as well as the required shape formed after the airbag 15 is inflated and deployed.

[0087] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made under the inventive concept of the present application by using the content of the specification and drawings of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. An airbag, having an inflated state and a folded state, characterized in that, Comprising: A bladder body having a bladder cavity, an airbag air inlet communicating with the bladder cavity, and a partition portion partitioning the bladder cavity; A first cavity and a second cavity are respectively formed on both sides of the partition portion; And an air inlet passage communicating the first cavity and the second cavity; The first cavity communicates with the airbag air inlet, and the second cavity communicates with the airbag air inlet through the first cavity, so that in the inflated state, the first cavity and the second cavity are sequentially deployed.

2. The airbag according to claim 1, characterized in that, The first cavity and the second cavity are arranged as a whole along a first direction; in the first direction, the bladder body has a corresponding air inlet end and a fixed end, the airbag air inlet is located at the air inlet end, the first cavity is located closer to the air inlet end relative to the second cavity, and the second cavity is located closer to the fixed end relative to the first cavity; A part of the partition portion extends along the first direction to space the first cavity and the second cavity in the inflated state, so that the first cavity and the second cavity in the inflated state can be juxtaposed and close to each other.

3. The airbag according to claim 2, wherein, The length of the partition portion extending along the first direction is not less than 0.5 cm.

4. The airbag according to claim 3, characterized in that, The length of the partition portion extending along the first direction is between 1 - 5 cm.

5. The airbag according to claim 2, characterized in that, In a second direction perpendicular to the first direction, the partition portion is relatively located in the middle of the bladder body, and there are two air inlet passages symmetrically arranged on both sides of the partition portion; Or, there are multiple partition portions, and the multiple partition portions are arranged as a whole along a second direction perpendicular to the first direction, and the air inlet passages are formed between adjacent two partition portions.

6. The airbag according to claim 2, characterized in that, In the first direction, the distance between the partition portion and the fixed end is greater than the distance between the partition portion and the air inlet end.

7. The airbag according to any one of claims 1 to 6, characterized in that, The partition portion is a suture line provided on the bladder body, and the suture line connects and fixes the two inner walls of the bladder cavity, and the suture line extends as a whole along an ellipse.

8. The airbag according to claim 2, characterized in that, A fixed mounting portion is provided on one side of the bladder body close to the fixed end, a restraining suture line is provided at a position of the bladder body close to the fixed mounting portion, the fixed mounting portion is located between the restraining suture line and the fixed end, and the restraining suture line connects and fixes the two inner walls of the bladder cavity so that the position of the restraining suture line is flat in the inflated state.

9. An airbag device, characterized in that, Comprising: An airbag box having a receiving cavity and a receiving cavity opening exposing the receiving cavity to the outside; The airbag bag according to any one of claims 1 to 8; And An inflation unit communicating with the airbag air inlet to inflate the airbag bag; In the folded state, a part of the airbag bag is received in the receiving cavity; In the inflated state, at least a part of the airbag bag received in the receiving cavity expands and extends outwards from the receiving cavity opening.

10. The airbag device according to claim 9, characterized in that, The bladder has corresponding air inlet end and fixed end. The airbag air inlet is located at the air inlet end. The first cavity is located closer to the air inlet end relative to the second cavity, and the second cavity is located closer to the fixed end relative to the first cavity. The fixed end is fixed outside the airbag box, and the air inlet end is located within the accommodation cavity. In the folded state, the bladder forming the first cavity as a whole is located within the accommodation cavity, and at least part of the bladder forming the second cavity is located outside the accommodation cavity.

11. The airbag device according to claim 10, characterized in that, The airbag box has a front side wall and a rear side wall arranged opposite to each other. In the folded state, the bladder exposed outside the accommodation cavity is located on the side where the rear side wall is located. In the inflated state, the inflated first cavity as a whole is located above the airbag box, the inflated second cavity as a whole is located on the side where the rear side wall is located, and part of the second cavity extends upward to be arranged side by side with the second cavity.

12. The airbag device according to claim 11, wherein, In the inflated state, the partition portion as a whole is located above the airbag box and on the side where the rear side wall is located. The partition portion, part of the bladder forming the first cavity, and part of the bladder forming the second cavity form a bearing surface for bearing a child's head.

13. The airbag device according to claim 10, characterized in that, The airbag box has a box body and a support body arranged below the box body. The accommodation cavity is arranged in the box body, and the inflation unit includes a gas cylinder arranged in the support body.

14. A safety seat, characterized in that, Comprising: a seat body, and the airbag device according to any one of claims 9 to 13, wherein the airbag box of the airbag device is connected to the seat body and is located in front of the seat body, or at least one of the left and right sides of the seat body.

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