An improved side curtain airbag

Abstract

This utility model discloses an improved side curtain airbag, including a side curtain airbag and a gas generator. A central protection chamber is formed in the middle of the side curtain airbag, a front protection chamber is formed in its front part, and a rear protection chamber is formed in its rear part. A front deflector and a rear deflector are disposed on the upper middle part of the side curtain airbag, located in front of and behind the central protection chamber, respectively. A downward-facing front air vent is opened on the bottom middle part of the front deflector, and a downward-facing rear air vent is opened on the bottom middle part of the rear deflector. A front inflation channel is formed inside the side curtain airbag between the front and central protection chambers; a rear inflation channel is formed inside the side curtain airbag between the rear and central protection chambers. This utility model improves the deployment speed of the side curtain airbag.

Description

Technical Field

[0001] This utility model relates to the field of automotive airbag technology, and in particular to an improved side curtain airbag. Background Technology

[0002] Side curtain airbags (CABs) are a type of safety device in a vehicle's passive restraint system. They deploy instantaneously during a collision to protect the occupants. When deployed, the side curtain airbags inflate, preventing occupants' heads from impacting hard objects on the side of the vehicle, such as interior trim, windows, and sheet metal, thus protecting their safety.

[0003] In pole impact accidents, side curtain airbags are crucial safety components that protect the heads and necks of vehicle occupants from injury or mitigate injury; their performance directly impacts occupant safety. Due to vehicle layout constraints, the distance from the front seat headrest to the B-pillar trim is small. During pole impact tests, the front passenger dummy's head will strike the B-pillar trim rapidly, and the side curtain airbags may not have deployed fully by then, rendering them ineffective.

[0004] Therefore, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below is the result of this research. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an improved side curtain airbag that shortens the deployment time, optimizes the coverage path, ensures that the head protection area is fully inflated when a pole collision occurs, and enhances the dynamic support capability for the occupant's head, in order to address the shortcomings of the existing technology.

[0006] The technical problem to be solved by this utility model can be achieved by the following technical solution:

[0007] An improved side curtain airbag includes a side curtain airbag installed in the roof of a vehicle and a gas generator installed in the side curtain airbag.

[0008] The side curtain airbag has a central protective chamber in its middle part, a front protective chamber in its front part, and a rear protective chamber in its rear part.

[0009] A front guide hood and a rear guide hood are provided on the upper middle side of the side curtain air bag, located in front of and behind the middle protective chamber. The top of the front guide hood is connected to the outlet of the gas generator, its front port is connected to the front protective chamber, and its rear port is connected to the middle protective chamber. The top of the rear guide hood is connected to the outlet of the gas generator, its front port is connected to the middle protective chamber, and its rear port is connected to the rear protective chamber.

[0010] The front air deflector has a downward-facing front air vent on its bottom center, and the rear air deflector has a downward-facing rear air vent on its bottom center.

[0011] A front inflation channel is formed inside the side curtain airbag between the front protection chamber and the middle protection chamber. The front inflation channel is connected to the front air inlet on one hand, and to the front protection chamber and the middle protection chamber on the other hand.

[0012] A rear inflation channel is formed inside the side curtain air bag between the rear protection chamber and the middle protection chamber. The rear inflation channel is connected to the rear air vent on one hand, and to the rear protection chamber and the middle protection chamber on the other hand.

[0013] In a preferred embodiment of the present invention, the middle protective chamber and the rear protective chamber are provided with a middle non-inflatable area.

[0014] In a preferred embodiment of the present invention, the side curtain airbag has several disc-shaped non-inflatable areas spaced apart in the non-collision area.

[0015] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: By opening downward-facing front and rear air vents on the front and rear fairings and inflating them through the front and rear inflation channels, this utility model improves the deployment speed of the side curtain airbags. When the dummy's head hits the B-pillar or the window, the side curtain airbags have already deployed, catching the dummy's head more quickly. This is especially suitable for scenarios where the gap between the car's B-pillar and the seat headrest is small and the car body intrusion speed is fast. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the movement trajectory of the front row dummy in a column collision.

[0019] Figure 3 This is a schematic diagram showing the relative position of the dummy's head in a column collision according to this utility model. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0021] See Figure 1 The figure shows a modified side curtain airbag, including a side curtain airbag 100 installed in the car roof and a gas generator (not shown) installed inside the side curtain airbag 100. In the event of a pole collision, the gas generator is detonated, generating a large amount of high-pressure gas that fills the side curtain airbag 100, causing the side curtain airbag 100 to deploy rapidly and protect the occupant's head and neck.

[0022] The side curtain airbag 100 has a central protective chamber 110 in its middle part, a front protective chamber 120 in its front part, and a rear protective chamber 130 in its rear part.

[0023] A front deflector 140 and a rear deflector 150 are provided on the upper middle side of the side curtain airbag 100, located in front of and behind the central protective chamber 110, respectively. The top 141 of the front deflector 140 is connected to the outlet of the gas generator, for guiding the gas generated by the gas generator into the side curtain airbag 100. The front port 142 of the front deflector 140 communicates with the front protective chamber 120, and its rear port 143 communicates with the central protective chamber 110. The top 151 of the rear deflector 150 is connected to the outlet of the gas generator, for guiding the gas generated by the gas generator into the side curtain airbag 100. The front port 152 of the rear deflector 150 communicates with the central protective chamber 130, and its rear port 153 communicates with the rear protective chamber 130.

[0024] The front fairing 140 has a downward-facing front air vent 144 on its middle bottom, and the rear fairing 150 has a downward-facing rear air vent 154 on its middle bottom.

[0025] The side curtain airbag 100 has a front inflation channel 160 located between the front protection chamber 120 and the middle protection chamber 110. The front inflation channel 160 is connected to the front air inlet 144 on one hand, and to the front protection chamber 120 and the middle protection chamber 110 on the other hand.

[0026] The side curtain airbag 100 has a rear inflation channel 170 located between the rear protection chamber 130 and the middle protection chamber 110. The rear inflation channel 170 is connected to the rear air inlet 154 on one hand, and to the rear protection chamber 130 and the middle protection chamber 110 on the other hand.

[0027] The middle protective chamber 110 and the rear protective chamber 130 are provided with a middle non-inflatable area 180. The purpose of this is to make the chambers inflate more evenly and avoid the air bag from floating up due to unbalanced inflation.

[0028] The side curtain airbag 100 has several disc-shaped non-inflatable areas 190 spaced apart in the non-collision area. These disc-shaped non-inflatable areas 190 can effectively limit the volume of the airbag and further prevent the side curtain airbag 100 from floating up.

[0029] See Figure 2 In a pillar collision, the front-row dummy will crash into the designed position 101 of the side curtain airbags 100. Because the front deflector 140 has a downward-facing front air inlet 144 at its bottom center, the gas inside the front deflector 140 enters the front inflation channel 160 through the front air inlet 144 and then fills the front protection chamber 120 and the middle protection chamber 110, causing the designed position 101 to inflate and quickly deploy to catch the dummy's head. Simultaneously, because the rear deflector 150 has a downward-facing rear air inlet 154 at its bottom center, the gas inside the rear deflector 150 enters the rear inflation channel 170 through the rear air inlet 154 and then fills the rear protection chamber 130 and the middle protection chamber 110, causing the side curtain airbags 100 to deploy rapidly.

[0030] See Figure 3 The side curtain airbag 100 is vertically downward, neither facing inward nor outward. When deployed, the side curtain airbag 100 has the maximum coverage area. At this time, the inflated side curtain airbag 100 is located between the dummy's head 10 and the door / window 20, preventing the door / window 20 from colliding with the dummy's head 10 and causing injury.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An improved side curtain airbag, comprising a side curtain airbag installed in the roof of a vehicle and a gas generator installed in the side curtain airbag; The side curtain airbag has a central protective chamber in its middle part, a front protective chamber in its front part, and a rear protective chamber in its rear part. A front guide shroud and a rear guide shroud are provided on the upper middle side of the side curtain air bag, located at the front and rear sides of the central protective chamber, respectively. The top of the front guide shroud is connected to the outlet of the gas generator, its front port communicates with the front protective chamber, and its rear port communicates with the central protective chamber. The top of the rear guide shroud is connected to the outlet of the gas generator, its front port communicates with the central protective chamber, and its rear port communicates with the rear protective chamber. The characteristic of this design is that... The front air deflector has a downward-facing front air vent on its bottom center, and the rear air deflector has a downward-facing rear air vent on its bottom center. A front inflation channel is formed inside the side curtain airbag between the front protection chamber and the middle protection chamber. The front inflation channel is connected to the front air inlet on one hand, and to the front protection chamber and the middle protection chamber on the other hand. A rear inflation channel is formed inside the side curtain air bag between the rear protection chamber and the middle protection chamber. The rear inflation channel is connected to the rear air vent on one hand, and to the rear protection chamber and the middle protection chamber on the other hand.

2. The improved side curtain airbag as described in claim 1, characterized in that, The middle protective chamber and the rear protective chamber are provided with a middle non-inflatable area.

3. The improved side curtain airbag as described in claim 1, characterized in that, The side curtain airbag has several disc-shaped uninflated areas spaced apart in the non-collision area.

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