Airbag and steering wheel

Abstract

The application discloses a safety air bag and a steering wheel. In the application, the safety air bag comprises a main air bag, the main air bag comprises a first sheet layer and a second sheet layer, and a first cavity is formed by a relative joint seam; a gas passage is formed on the second sheet layer; a support air bag is jointed with the second sheet layer, and the support air bag has a second cavity which is communicated with the gas passage; a gas guide structure has a guide sheet layer and a pair of gas blocking sheet layers; the guide sheet layer covers the second sheet layer to form a guide channel, and the gas passage is located in the area covered by the guide sheet layer; the gas blocking sheet layers are jointed with the second sheet layer and extend into the support air bag; the pair of gas blocking sheet layers are alternately and staggeredly arranged; a gas generator passes gas into the support air bag through the guide channel; the main air bag and the support air bag are changed from a storage state to an inflation state when the gas generator is inflated, and the support air bag is supported on an instrument desk from the gap in the inflation state. Compared with the prior art, the safety air bag can be stably supported after being unfolded, and the loss risk of the driver is reduced.

Description

Technical Field

[0001] This invention relates to the field of automotive airbag technology, and particularly to an airbag and steering wheel. Background Technology

[0002] The diversification and intelligent development of automobiles have placed higher demands on airbag design and protection range. Currently, most steering wheels are round or square, and driver's airbags are also mostly round, with the steering wheel rim supporting the airbag and maintaining its deployment posture. However, some cars use irregularly shaped steering wheels, such as half-spoke steering wheels. These steering wheels offer poor stability in supporting the deployed airbag, potentially increasing the risk of injury to the driver. Summary of the Invention

[0003] The purpose of this invention is to provide an airbag and steering wheel that can stably support the airbag after it is deployed, thereby reducing the risk of injury to the driver.

[0004] To address the aforementioned technical problems, embodiments of the present invention provide an airbag for use in the driver's cab of a vehicle, the vehicle including: a steering wheel and a dashboard; the top of the steering wheel rim has a notch, and the airbag includes:

[0005] The main air bag includes a first layer and a second layer, which are joined and sewn together to form a first chamber; an air outlet is provided on the second layer.

[0006] A support air bag is sewn to the second sheet, and the open end of the support air bag surrounds the outer periphery of the air outlet; and the support air bag has a second chamber that communicates with the air outlet.

[0007] A gas guiding structure includes a guiding sheet layer located inside the supporting air bag and stitched to the second sheet layer, and a pair of air-blocking sheets layer; the guiding sheet layer covers a portion of the second sheet layer to form a guiding channel, and the air outlet is located in the area covered by the guiding sheet layer; the guiding channel communicates with the first chamber; the air-blocking sheets layer is stitched to the second sheet layer and extends into the supporting air bag; the pair of air-blocking sheets layer are alternately staggered and opposite to the air outlet.

[0008] A gas generator, which is connected to the flow channel and is used to introduce gas into the support air bag through the flow channel;

[0009] The main air bag and the supporting air bag are used to change from a retracted state to an expanded state when the gas generator is inflated, and the supporting air bag is used to support the instrument panel from the notch when it is inflated.

[0010] Compared to existing technologies, the present invention, in its embodiment, involves gas generated by a gas generator being guided into the support airbag through a gas flow guiding structure. Simultaneously, the main airbag is inflated. The main airbag and support airbag expand, with the steering wheel supporting the main airbag. The support airbag extends from a notch in the steering wheel and supports the dashboard. Thus, the steering wheel and dashboard work together to support the airbag, ensuring its stable support and reducing the risk of injury to the driver. Furthermore, a pair of air deflector layers are provided. When the support airbag is compressed after entering it, the two deflector layers overlap, preventing gas from flowing back into the main airbag and further ensuring the stability of the airbag during inflation.

[0011] In one embodiment, the supporting air bag, the flow guide layer, the pair of air-blocking layers, and the second layer are stitched together and fixed in place.

[0012] In one embodiment, the support airbag has a first support layer and a second support layer;

[0013] Both the first support sheet and the second support sheet are sewn and fixed to the second sheet, and the outer peripheries of the first support sheet and the second support sheet are sewn to surround the air outlet to form the second chamber.

[0014] In one embodiment, the first support sheet is located above the second support sheet;

[0015] The first support layer, one of the air-blocking layers, and the second layer are stitched together and fixed.

[0016] The second support layer, the other air-blocking layer, and the second layer are stitched together.

[0017] In one embodiment, one of the air-blocking layers bends downward to form a first air-blocking portion, and the other air-blocking layer bends upward to form a second air-blocking portion;

[0018] The first air baffle and the second air baffle are partially opposite to each other.

[0019] In one embodiment, the pair of air-blocking layers are flexible fabric layers;

[0020] The first air-blocking portion and the second air-blocking portion have multiple curved regions, and the first air-blocking portion and the second air-blocking portion are designed to be stretchable and extendable when subjected to gas impact.

[0021] In one embodiment, the support airbag, when inflated, is elliptical in shape extending toward the dashboard.

[0022] In one embodiment, both the first sheet and the second sheet are circular.

[0023] In one embodiment, a pair of vent holes are provided on the second layer, and the vent holes are symmetrically arranged on both sides of the supporting air bag.

[0024] Embodiments of the present invention also provide a steering wheel, comprising: a steering wheel body, and an airbag as described in any of the above. Attached Figure Description

[0025] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0026] Figure 1 This is a structural schematic diagram of the driver in the normal state in the cab according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of a steering wheel according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the airbag in the driver's cab in an inflated state according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the internal structure of an airbag in an inflated state according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the airbag facing away from the driver in an inflated state according to an embodiment of the present invention;

[0031] Figure descriptions: 100, Airbag; 1, Main airbag; 2, Support airbag; 4, Gas generator; 11, First layer; 12, Second layer; 120, Exhaust port; 13, First chamber; 30, Airflow channel; 31, Airflow guide layer; 32, Air deflector; 20, Second chamber; 21, First support layer; 22, Second support layer; 321, First air deflector; 322, Second air deflector; 5, Steering wheel; 50, Notch; 6, Dashboard; 7, Driver. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of the present invention to enable the reader to better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0033] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0034] Unless the context requires otherwise, throughout the specification and claims, the word “comprising” and its variations, such as “including” and “having”, shall be understood to have an open, inclusive meaning, that is, to be interpreted as “including, but not limited to”.

[0035] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the purpose, features, and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative of the essential spirit of the technical solution of the present invention.

[0036] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0037] The singular forms “a” and “the” used in this specification and the appended claims include plural references unless otherwise expressly stated herein. It should be noted that the term “or” is generally used to mean “and / or” unless otherwise expressly stated herein.

[0038] In the following description, in order to clearly demonstrate the structure and working method of the present invention, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0039] Embodiments of the present invention are described below with reference to the accompanying drawings.

[0040] One embodiment of the present invention relates to an airbag 100. For example... Figure 1 , Figure 2 , Figure 3 As shown, the airbag 100 is used in the driver's cab of the vehicle, which includes a steering wheel 5 and an instrument panel 6. The steering wheel 5 has a notch 50 at the top of its rim. The steering wheel 5 is an irregularly shaped steering wheel 5, such as a half-spoke steering wheel 5. Figure 3 and Figure 4 As shown, the airbag 100, when not inflated, is positioned within the steering wheel 5. The airbag 100 includes a main airbag 1, a support airbag 2, a gas guiding structure, and a gas generator 4. The main airbag 1 includes a first layer 11 and a second layer 12, which are sewn together to form a first chamber 13. An air outlet is provided on the second layer 12. The support airbag 2 is sewn to the second layer 12, with its open end surrounding the air outlet. The support airbag 2 has a second chamber 20 communicating with the air outlet. The gas guiding structure includes a guide layer 31 located within the support airbag 2 and sewn to the second layer 12, and a pair of baffle layers 32. The guide layer 31 covers a portion of the second layer 12 to form a guide channel 30, and the air outlet is located in the area covered by the guide layer 31, communicating with the first chamber 13. The air baffle 32 layers are stitched together with the second layer 12 and extend into the support air bag 2. A pair of air baffle 32 layers are alternately staggered and opposite to the air outlet. The generator is connected to the guide channel 30 and is used to introduce gas into the support air bag 2 through the guide channel 30. The main air bag 1 and the support air bag 2 are used to change from a retracted state to an expanded state when the gas generator 4 is inflated, and the support air bag 2 is used to support the instrument panel 6 from the notch 50 when it is inflated.

[0041] Specifically, such as Figure 3 and Figure 4 As shown, after the gas generator 4 is triggered, the gas generator 4 fills the guide channel 30 with gas. The guide channel 30 is connected to the first chamber 13 and also connected to the air outlet. The guide channel 30 introduces the gas into the second chamber 20 of the support air bag 2, causing the support air bag 2 and the main air bag 1 to expand and burst out of the steering wheel 5. The support air bag 2 extends towards the dashboard 6 and is supported by the dashboard 6. The main air bag 1 covers the surface of the dashboard 6, and the hub of the steering wheel 5 supports the main air bag 1.

[0042] As can be seen from the above, the gas generated by the gas generator 4 is guided into the support airbag 2 through the guide vane layer 31 of the gas guiding structure, while simultaneously inflating the main airbag 1. The main airbag 1 and the support airbag 2 expand, the steering wheel 5 supports the main airbag 1, and the support airbag 2 extends from the notch 50 of the steering wheel 5 to support the dashboard 6. Thus, the steering wheel 5 and the dashboard 6 work together to support the airbag 100, ensuring its stable support and reducing the risk of injury to the driver 7. Furthermore, a pair of air deflector layers 32 are provided. After the airflow enters the support airbag 2, when the support airbag 2 is compressed, the two air deflector layers 32 overlap, preventing the gas in the support airbag 2 from flowing back into the main airbag 1, further ensuring the stability of the airbag 100 in its inflated state.

[0043] Furthermore, such as Figure 5As shown, a pair of vent holes 120 are provided on the second layer 12, and the vent holes 120 are symmetrically arranged on both sides of the supporting air bag 2.

[0044] Furthermore, such as Figure 3 and Figure 4 As shown, the supporting airbag 2, the air guide layer 31, the pair of air deflector layers 32, and the second layer 12 are stitched together to make the structure of the airbag 100 more ingenious and simple.

[0045] In addition, such as Figure 3 and Figure 4 As shown, the support air bag 2 has a first support layer 21 and a second support layer 22. The first support layer 21 and the second support layer 22 are both sewn and fixed to the second layer 12, and the outer periphery of the first support layer 21 and the second support layer 22 are sewn to surround the air outlet to form a second chamber 20.

[0046] Furthermore, such as Figure 3 and Figure 4 As shown, the first support layer 21 is located above the second support layer 22. The first support layer 21, one air baffle layer 32, and the second layer 12 are sewn together and fixed. The second support layer 22, another air baffle layer 32, and the second layer 12 are sewn together and fixed.

[0047] In addition, such as Figure 3 and Figure 4 As shown, one air deflector layer 32 bends downward to form a first air deflector 321, and another air deflector layer 32 bends upward to form a second air deflector 322. The first air deflector 321 and the second air deflector 322 are partially opposite to each other. During the initial inflation of the airbag 100, the gas generated by the gas generator 4 has a relatively large force, allowing the airflow to enter the support airbag 2 between the first air deflector 321 and the second air deflector 322. When the driver 7 presses down on the main airbag 1, the support airbag 2 is also under pressure. At this time, the impact pressure on the human body is not as great as the inflation pressure of the gas generator 4, allowing the first air deflector 321 and the second air deflector 322 to overlap, preventing gas from flowing back from the support airbag 2 into the main airbag 1.

[0048] More importantly, such as Figure 4 and Figure 5 As shown, the pair of air baffles 32 layers are made of flexible fabric. The first air baffle 321 and the second air baffle 322 have multiple bending areas, and the first air baffle 321 and the second air baffle 322 are designed to be stretchable and extendable when impacted by gas. When gas impacts the first air baffle 321 and the second air baffle 322, the first air baffle 321 and the second air baffle 322 have sufficient deformability to avoid deformation and damage.

[0049] In addition, such as Figure 3 and Figure 4As shown, the support airbag 2 is elliptical in shape when inflated, extending toward the dashboard 6, forming a sufficient length and a support area with the dashboard 6.

[0050] In addition, such as Figure 3 and Figure 5 As shown, both the first layer 11 and the second layer 12 are circular. Thus, the main air bag 1 is circular when inflated, which is more suitable for the human body. Furthermore, the design of the gas guiding structure and the supporting air bag 2 does not affect the shape of the main air bag 1 after inflation, thus maintaining the main function of the main air bag 1.

[0051] The preferred embodiments of the present invention have been described in detail above, but it should be understood that, if necessary, aspects of the embodiments can be modified to utilize aspects, features, and concepts from various patents, applications, and publications to provide other embodiments.

[0052] In light of the detailed description above, these and other changes can be made to the embodiments. Generally, the terminology used in the claims should not be considered limited to the specific embodiments disclosed in the specification and claims, but should be understood to include all possible embodiments together with the full scope of equivalents enjoyed by these claims.

[0053] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the present invention.

Claims

1. An airbag for use in the driver's cab of a vehicle, the vehicle comprising: Steering wheel and dashboard; The steering wheel rim has a notch at the top, characterized in that; the airbag comprises: The main air bag includes a first layer and a second layer, which are joined and sewn together to form a first chamber; an air outlet is provided on the second layer. A support air bag is sewn to the second sheet, and the open end of the support air bag surrounds the outer periphery of the air outlet; and the support air bag has a second chamber that communicates with the air outlet. A gas guiding structure includes a guiding sheet layer and a pair of air-blocking sheets. The guiding sheet layer is located within a first chamber, and the pair of air-blocking sheets are located within a supporting air bag. The guiding sheet layer and the pair of air-blocking sheets are stitched together with a second sheet layer. The guiding sheet layer covers a portion of the second sheet layer to form a guiding channel, and the air outlet is located in the area covered by the guiding sheet layer. The guiding channel communicates with the first chamber. The air-blocking sheets are stitched together with the second sheet layer and extend into the supporting air bag. The pair of air-blocking sheets are alternately staggered and opposite to the air outlet. A gas generator, which is connected to the flow channel and is used to introduce gas into the support air bag through the flow channel; The main air bag and the supporting air bag are used to change from a retracted state to an expanded state when the gas generator is inflated, and the supporting air bag is used to support the instrument panel from the notch when it is inflated.

2. The airbag according to claim 1, characterized in that, The supporting air bag, the guide plate layer, the pair of air-blocking plate layers, and the second plate layer are stitched together and fixed.

3. The airbag according to claim 2, characterized in that, The support air bag has a first support layer and a second support layer; Both the first support sheet and the second support sheet are sewn and fixed to the second sheet, and the outer peripheries of the first support sheet and the second support sheet are sewn to surround the air outlet to form the second chamber.

4. The airbag according to claim 3, characterized in that, The first support layer is located above the second support layer; The first support layer, one of the air-blocking layers, and the second layer are stitched together and fixed. The second support layer, the other air-blocking layer, and the second layer are stitched together.

5. The airbag according to claim 4, characterized in that, One of the air-blocking layers bends downward to form a first air-blocking portion, and the other air-blocking layer bends upward to form a second air-blocking portion; The first air baffle and the second air baffle are partially opposite to each other.

6. The airbag according to claim 5, characterized in that, The pair of air-blocking layers are made of flexible fabric. The first air-blocking portion and the second air-blocking portion have multiple curved regions, and the first air-blocking portion and the second air-blocking portion are designed to be stretchable and extendable when subjected to gas impact.

7. The airbag according to claim 1, characterized in that, When inflated, the support airbag is elliptical in shape and extends toward the dashboard.

8. The airbag according to claim 1, characterized in that, Both the first and second sheets are circular.

9. The airbag according to claim 1, characterized in that, The second layer has a pair of vent holes, which are symmetrically arranged on both sides of the supporting air bag.

10. A steering wheel, characterized in that, include: The steering wheel body, and the airbag as described in any one of claims 1-9.

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