Airbag and seat assembly

Abstract

The utility model provides a safety air bag and a seat assembly. The safety air bag is to be fixed at the position of a side wall framework of a seat and comprises an air bag body, a fixing part and a fixing part, and the air bag body has an unfolded state and a folded state; wherein the air bag is provided with a first side cavity, a middle cavity and a second side cavity which are in fluid communication with one another, and the first side cavity and the second side cavity are separated in the first direction and connected together through the middle cavity; the middle chamber comprises a first sub-chamber and a second sub-chamber, the second sub-chamber is connected to one side of the first sub-chamber along a second direction, and the second direction is different from the first direction; in the unfolded state, the side, connected with the second sub-cavity, of the first sub-cavity is provided with a concave part, and the side, connected with the first sub-cavity, of the second sub-cavity is provided with a protruding part.

Description

TECHNICAL FIELD

[0001] The utility model relates to a safety device in a vehicle, in particular to a safety air bag and a safety air bag assembly. BACKGROUND

[0002] As a safety device, a safety air bag is widely equipped in a vehicle to protect an occupant in the vehicle from injury in an emergency. The safety air bag includes an air bag and a gas generator. The air bag is generally in a storage state and is stored at a predetermined position in the vehicle; when the vehicle collides or is impacted, the air bag in the storage state is rapidly inflated by the gas generated by the explosion of the gas generator, and the inflated air bag expands to provide protection for the occupant of the vehicle.

[0003] Nowadays, the comfort of a car seat is an important measure for people when choosing a car. Generally, the seat back of a vehicle seat can be rotated and moved forward and backward relative to the seat cushion of the vehicle seat. The passenger can adjust the angle of the backrest relative to the seat cushion to select an angle at which the passenger's back can be comfortably leaned against the backrest, and can also adjust the forward and backward position of the seat cushion to select a comfortable position for the passenger's lower limbs. In addition, the seat cushion of the vehicle can be rotated about its pivot axis (usually located near the backrest, i.e., the rear side of the seat cushion), and the passenger can adjust the angle of the seat cushion relative to the horizontal plane to select an angle at which the passenger's lower limbs can be comfortably placed on the seat cushion to reduce the support force borne by the passenger's lower limbs.

[0004] Therefore, it is desirable to provide a safety air bag suitable for use in a seat with a large degree of adjustment. SUMMARY

[0005] The utility model aims at providing a safety air bag suitable for use in a seat with a large degree of adjustment, and a seat assembly comprising the safety air bag.

[0006] One aspect of the utility model provides a safety air bag to be fixed at a side frame of a seat, and comprising:

[0007] an air bag having an unfolded state and a storage state;

[0008] wherein,

[0009] the air bag has a first side chamber, a middle chamber and a second side chamber in fluid communication with each other, the first side chamber and the second side chamber are spaced apart along a first direction and connected together via the middle chamber;

[0010] the middle chamber includes a first sub-chamber and a second sub-chamber, the second sub-chamber is connected to one side of the first sub-chamber along a second direction, the second direction is different from the first direction;

[0011] In the deployed state, the first sub-chamber has a recess on a side connected to the second sub-chamber, and the second sub-chamber has a protrusion on a side connected to the first sub-chamber.

[0012] According to an embodiment of the present application, the first sub-chamber of the intermediate chamber has a first end and a second end connected to the first side chamber and the second side chamber respectively, and the first end and the second end are arranged in a third direction different from the first direction and the second direction.

[0013] According to an embodiment of the present application, the first side chamber has a larger deployment length along the second direction than the second side chamber.

[0014] According to an embodiment of the present application, a passage portion for connecting the first sub-chamber and the second side chamber is further included, and the passage portion is connected to an end portion of the second side chamber along the third direction.

[0015] According to an embodiment of the present application, a first pull strap is further included, one end of the first pull strap is fixed to the first side chamber, and the other end of the first pull strap is fixed to an external member.

[0016] And / or,

[0017] A second pull strap is further included, one end of the second pull strap is fixed to the second side chamber, and the other end of the second pull strap is fixed to an external member.

[0018] According to an embodiment of the present application, in the second direction, the protrusion protrudes from the first sub-chamber, and the protrusion is configured to have a shape of a triangular prism.

[0019] According to an embodiment of the present application, a first gas generator and a second gas generator are further included, the first gas generator is connected at a first communication port of the first side chamber, and the second gas generator is connected at a second communication port of the second side chamber.

[0020] Another aspect of the present application also provides a seat assembly, wherein the seat assembly comprises the airbag and the seat according to any one of the preceding embodiments.

[0021] In the deployed state, the first side chamber and the second side chamber are respectively located on both sides of the width direction of the backrest portion of the seat, and

[0022] The recess of the first sub-chamber is located at one side of the intermediate chamber close to the backrest part, and the protrusion of the second sub-chamber is located at one side of the intermediate chamber away from the backrest part.

[0023] According to the embodiment of the present application, the first gas generator is connected at the first communication port of the first side chamber, the second gas generator is connected at the second communication port of the second side chamber, and the first gas generator and the second gas generator are respectively arranged at the left side and the right side of the side frame of the seat.

[0024] According to the embodiment of the present application, in the unfolded state, the first side chamber is positioned at the top of the backrest part and the headrest part, and the second side chamber is positioned at the middle position of the backrest part and the armrest part. BRIEF DESCRIPTION OF DRAWINGS

[0025] The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same elements, in which:

[0026] Figure 1 The front surface of the airbag according to the embodiment of the present application is schematically shown.

[0027] Figure 2 The side surface of the airbag according to the embodiment of the present application is schematically shown.

[0028] Figure 3 The other side surface of the airbag according to the embodiment of the present application is schematically shown.

[0029] Figure 4 The gas bag of the airbag according to the embodiment of the present application is schematically shown. DETAILED DESCRIPTION

[0030] The specific embodiments of the airbag and the seat assembly according to the present application will be described below with reference to the accompanying drawings. The following detailed description and drawings are used to exemplarily illustrate the principles of the present application, and the present application is not limited to the preferred embodiments described, and each embodiment described in the present application can be used alone or in any combination, and the protection scope of the present application is defined by the claims.

[0031] In addition, spatially relative terms (such as "upper," "lower," "left," and "right") are used to describe the relative positional relationship of an element shown in the drawings to another element. Therefore, the spatially relative terms can be applied to orientations different from those shown in the drawings when used. Obviously, although all of these spatially relative terms refer to the orientations shown in the drawings for ease of description, those skilled in the art will understand that orientations different from those shown in the drawings can be used.

[0032] Figure 1 The front side of an airbag according to an embodiment of the present invention is schematically shown. Figure 2 The side surface of an airbag according to an embodiment of the present invention is schematically shown. Figure 3 The other side of the airbag according to the embodiment of the present invention is schematically shown.

[0033] like Figures 1 to 3 As shown, the airbag 1 according to the present invention is fixed to the side frame of the seat 2 (as shown in FIG. Figure 2 and Figure 3 (As shown in the figure), the airbag 1 includes an airbag 10, which has a stowed state and a deployed state. In the stowed state, the airbag 10 is completely stored in the side frame of the seat 2. In the deployed state, the airbag 10 deploys from the backrest 22 and protects the occupant from the left, right, and front sides. This is described in detail below.

[0034] The air bag 10 includes a first side chamber 101, a middle chamber 102, and a second side chamber 103, which are in fluid communication with each other. In the deployed state, the first side chamber 101 and the second side chamber 103 are spaced apart in a first direction, i.e., the width direction of the vehicle, and are located on the left and right sides of the seat 2, respectively. At the same time, the first side chamber 101 and the second side chamber 103 are connected together via the middle chamber 102.

[0035] In such Figure 1 In the orientation of the air bag 10 shown, the first side chamber 101 is used to protect the passenger from the right side of the passenger, and the second side chamber 103 is used to protect the passenger from the left side of the passenger. As an example, the first side chamber 101 is positioned at the top of the backrest 22 and the headrest 21 (see FIG. Figure 2 ) to protect the passenger's head and cervical spine from the right side of the passenger and prevent the passenger from hitting the door and window of the car. The second side chamber 103 is located at the middle position of the backrest 22 and the armrest (see Figure 3 ) to protect the passenger from colliding with the adjacent passenger from the left side of the passenger. Therefore, compared with the second side chamber 103, the first side chamber 101 has a smaller expansion length along the third direction (the height direction of the vehicle). Figure 3As shown, the first side chamber 101 has a larger unfolded length along the second direction (the length direction of the vehicle) than the second side chamber 103, so as to substantially cover the vehicle window and thereby provide a larger range of protection from the right side of the passenger. In addition, the middle chamber 102 is used to protect the passenger from the front side of the passenger, especially the chest of the passenger.

[0036] In combination Figure 4 As shown, the middle chamber 102 includes a first sub-chamber 1021 and a second sub-chamber 1022, which are arranged in a stacked manner from the front side of the passenger in the unfolded state, and the first sub-chamber 1021 and the second sub-chamber 1022 are staggered with each other in the height direction of the vehicle, so that the first sub-chamber 1021 is located at a lower position than the second sub-chamber 1022. Specifically, the second sub-chamber 1022 is connected to one side of the first sub-chamber 1021 along the second direction, i.e., the length direction of the vehicle, in other words, the second sub-chamber 1022 is connected to the side of the first sub-chamber 1021 facing the passenger. In addition, in order for the airbag 10 to be able to unfold smoothly, the middle chamber 102 further includes a recess 102A, specifically, in the unfolded state, the first sub-chamber 1021 has a recess 102A on the side facing the passenger, i.e., on the side connected to the second sub-chamber 1022; and in order to increase the stability when the airbag 10 is unfolded, the middle chamber 102 further includes a protrusion 102B, specifically, in the unfolded state, the second sub-chamber 1022 has a protrusion 102B on the side away from the passenger, i.e., on the side connected to the first sub-chamber 1021.

[0037] It can be understood that, in the safety airbag of the utility model, in order to provide reliable protection for the passenger from the front side of the passenger, the middle chamber of the airbag has a large unfolding size in the third direction, i.e. the height direction of the vehicle, in order to take into account the smooth unfolding of the airbag and the stability after unfolding, the middle chamber is provided with two sub-chambers, the inner side (the side facing the passenger) of the sub-chamber on the lower side is provided with a recess, and the outer side (the side away from the passenger) of the sub-chamber on the upper side is provided with a protrusion. Therefore, in the unfolding process of the airbag, the first sub-chamber of the middle chamber passes over the head of the passenger before the second sub-chamber, and the recess on the first sub-chamber helps the above-mentioned unfolding process of the first sub-chamber without touching the passenger to cause injury to the passenger or hinder the unfolding process; next, after the first sub-chamber passes over the head of the passenger, it will be positioned in front of the passenger, at this time, the protrusion on the second sub-chamber can abut against other components in the vehicle, such as the rear part of the front seat, which helps to improve the unfolding stability of the airbag. At the same time, the safety airbag device of the utility model is integrated into the inside of the side wall framework of the seat, i.e. the backrest part, so that it can always remain relatively stationary with the backrest part and the seat, even if the angle of the backrest part relative to the seat cushion changes, or the seat as a whole slides and shifts in the length direction of the vehicle, the safety airbag always remains relatively stationary with the backrest part of the seat, and can not be affected by the adjustment of the seat, therefore, it is suitable for use in a seat with a large adjustment degree.

[0038] As an embodiment of the utility model, as shown in the figure, in the second direction (i.e. the length direction of the vehicle), the protrusion 102B protrudes from the first sub-chamber 1021, and the protrusion 102B can be configured to have the shape of a triangular prism. Of course this is only an example, the shape of the protrusion is not limited to a triangular prism, and it can also be designed to have other polygonal shapes as needed. Figure 4

[0039] As an embodiment of the utility model, the first sub-chamber 1021 can be configured to have a long strip shape, and has a first end and a second end opposite in the length direction, which are respectively connected to the first side chamber 101 and the second side chamber 103, and are arranged in a staggered manner along the third direction (the height direction of the vehicle). In this way, even if the first sub-chamber 1021 has a large size in the height direction of the vehicle when it is unfolded, it still has a small volume.

[0040] In order to facilitate the connection between the first sub-chamber 1021 and the second side chamber 103, as an embodiment of the utility model, the airbag 10 further comprises a passage part 104 for connecting the first sub-chamber 1021 and the second side chamber 103, and the passage part 104 is connected to the end part of the second side chamber 103 along the third direction (the height direction of the vehicle).

[0041] ​As an embodiment of the present application, the safety airbag 1 further comprises a first gas generator and a second gas generator (not shown), the first gas generator is connected at the first communication port of the first side chamber 101, and the second gas generator is connected at the second communication port of the second side chamber 103. Optionally, the first gas generator and the second gas generator can be respectively arranged at the left side and the right side of the side frame of the seat. It can be understood that arranging two gas generators can improve the deployment speed of the airbag, but this is only an example, and only one gas generator can also be arranged in the safety airbag of the present application.

[0042] As an embodiment of the present application, the safety airbag 1 further comprises a first pull belt 105 and a second pull belt 106, one end of the first pull belt 105 is fixed with the first side chamber 101, and the other end of the first pull belt 105 is fixed with the side frame; one end of the second pull belt 106 is fixed with the second side chamber 103, and the other end of the second pull belt 106 is fixed with the side frame. It can be understood that the first pull belt and the second pull belt are outer pull belts positioned outside the airbag, which can reliably fix the upper limbs of the passenger on the backrest of the seat when, for example, a collision occurs.

[0043] As described above, although the exemplary embodiments of the present application have been described with reference to the accompanying drawings in the description, the present application is not limited to the above-described specific embodiments, and the scope of protection of the present application should be defined by the claims and their equivalent meanings.

Claims

1. An airbag (1) to be fixed to a side frame of a seat (2) and comprising: An air bag (10), wherein the air bag (10) has an expanded state and a stowed state; It is characterized by: The air bag (10) has a first side chamber (101), a middle chamber (102), and a second side chamber (103) in fluid communication with each other, wherein the first side chamber (101) and the second side chamber (103) are spaced apart along a first direction and connected together via the middle chamber (102); The intermediate chamber (102) includes a first sub-chamber (1021) and a second sub-chamber (1022), wherein the second sub-chamber (1022) is connected to one side of the first sub-chamber (1021) along a second direction, the second direction being different from the first direction; In the expanded state, the first sub-chamber (1021) has a recessed portion (102A) on the side connected to the second sub-chamber (1022), and the second sub-chamber (1022) has a protruding portion (102B) on the side connected to the first sub-chamber (1021).

2. The airbag (1) according to claim 1, wherein: The first sub-chamber (1021) of the intermediate chamber (102) has a first end and a second end connected to the first side chamber (101) and the second side chamber (103), respectively, and the first end and the second end are staggered along a third direction, which is different from the first direction and the second direction.

3. The airbag (1) according to claim 2, wherein: Compared to the second side chamber (103), the first side chamber (101) has a larger expanded length along the second direction.

4. The airbag (1) according to claim 3, wherein: It also includes a channel portion (104) for connecting the first sub-chamber (1021) and the second side chamber (103), and the channel portion (104) is connected to the end of the second side chamber (103) along the third direction.

5. The airbag (1) according to claim 1, wherein It also includes a first drawstring (105), one end of the first drawstring (105) is fixed to the first side chamber (101), and the other end of the first drawstring (105) is fixed to the external component; and / or, The invention further comprises a second drawstring (106), one end of the second drawstring (106) is fixed to the second side chamber (103), and the other end of the second drawstring (106) is fixed to the external component.

6. The airbag (1) according to claim 1, wherein: In the second direction, the protrusion (102B) protrudes from the first sub-chamber (1021), and the protrusion (102B) is configured to have a triangular prism shape.

7. The airbag (1) according to claim 1, wherein: It also includes a first gas generator and a second gas generator, wherein the first gas generator is connected to the first communication port of the first side chamber (101), and the second gas generator is connected to the second communication port of the second side chamber (103).

8. A seat assembly, characterized in that: comprising the airbag (1) and seat (2) according to any one of claims 1 to 7, In the unfolded state, the first side chamber (101) and the second side chamber (103) are respectively located on both sides of the backrest (22) of the seat (2) in the width direction, and, The recessed portion (102A) of the first sub-chamber (1021) is located on a side of the intermediate chamber (102) close to the backrest (22), and the protruding portion (102B) of the second sub-chamber (1022) is located on a side of the intermediate chamber (102) away from the backrest (22).

9. The seat assembly of claim 8, wherein: The invention also includes a first gas generator and a second gas generator, wherein the first gas generator is connected to the first communication port of the first side chamber (101), and the second gas generator is connected to the second communication port of the second side chamber (103), and the first gas generator and the second gas generator are respectively arranged on the left and right sides of the side frame of the seat (2).

10. The seat assembly of claim 8, wherein: In the unfolded state, the first side chamber (101) is positioned at the top and headrest portion of the backrest (22), and the second side chamber (103) is positioned at the middle position and armrest portion of the backrest (22).

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