Air guiding device for curtain type air bag
By designing an air conductor device for curtain airbags, the positioning of the airbag reinforcement sheet, airbag lining sheet and airbolt plate, the sewing protrusion structure and folding line method are used to solve the problem of insufficient sealing after collision of curtain airbags, achieving better sealing and pressure stability, and improving the safety factor of the vehicle.
Patent Information
- Application Number
- CN202421465213.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-25
AI Technical Summary
The latest protection regulations require that the airbag cannot be dissipated immediately after a collision, and the pressure needs to be more than 50% after 6S, which puts higher requirements on the sealing between the air guide device and the generator of the curtain airbag.
An air conductor device for curtain airbags is designed, including air bag reinforcement sheet, air bag lining sheet and air guide sheet. Through the symmetrical structure of positioning and sewing protrusions and the folding line of the folding line, a sealing channel is formed, and the folding line of the air bag lining is fixed through a single sewing thread to reduce the use of sewing thread and enhance the sealing property.
The fitting density of the generator, air guide device and clamp are improved, the sealing is enhanced, the pressure holding is stable, the air-saving capacity of the curtain airbag is improved, the curtain air-saving capacity is ensured, and the vehicle still has a certain pressure after the collision is achieved, and the vehicle's safety factor is improved.
Smart Images
Figure CN222645966U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile passive safety, in particular to an air guide device for a curtain air bag. Background Art
[0002] The curtain airbag is an auxiliary protection device in the vehicle's airbag system. When the vehicle collides with an obstacle from the side during driving, the vehicle's airbag system is activated and the generator in the curtain airbag inflates the airbag to make it pop out and deploy instantly, thereby forming a flexible buffer body that acts as a cushion between the driver and the equipment in the vehicle, reducing the impact force on the driver and the passengers, thereby reducing the injuries to the driver and the passengers.
[0003] The latest protection regulations require that the airbag cannot be deflated immediately in a short period of time. Specifically, the pressure of the curtain airbag must still be greater than 50% 6S after the collision, so as to further improve the vehicle's safety factor. This puts higher requirements on the sealing between the generator and the air guide device of the curtain airbag. Therefore, ensuring the sealing between the generator and the air guide device has become the key to achieving the requirements of the latest protection regulations. Utility Model Content
[0004] In view of the above problems, an embodiment of the utility model provides an air guide device for a curtain airbag.
[0005] An embodiment of the utility model provides an air guide device for a curtain airbag, comprising an airbag reinforcement sheet, an airbag lining sheet and an air guide sheet, wherein the airbag reinforcement sheet, the airbag lining sheet and the air guide sheet are all provided with positioning and sewing protrusions, the positioning and sewing protrusions are symmetrically structured with a folding line, the airbag reinforcement sheet, the airbag lining sheet and the air guide sheet are laid flat and stacked from top to bottom in a manner that the positioning and sewing protrusions are aligned, and after being laid flat and stacked, they are folded in half along the folding line to form a folded structure, in which interfaces of overlapping areas of the air guide sheet and the airbag lining sheet along the folding direction in the folded structure are sewn and fixed by sewing thread to form a sealed passage with an opening; the positioning and sewing protrusions in the airbag lining sheet are provided with connecting holes for the passage of a generator bracket, and the horizontally overlapping straight edges formed by the positioning and sewing protrusions after the airbag lining sheet is folded in half along the folding line are sewn and fixed by a single sewing thread.
[0006] Compared with the prior art, the beneficial effects of the utility model are: the airbag lining in the air guide device is folded along the folding line and positioned, and the horizontal overlapping straight edges formed by the sewing protrusions are sewn by a single sewing thread, that is, the sewing thread at the clamping position of the bracket is reduced, so that the generator, the air guide device and the clamp fit more closely, the sealing is better, and the pressure is stable; the addition of connecting holes in the airbag lining ensures the relative position of the air guide device, the generator and the bracket for assembly, and the matching size consistency is better, so that the curtain airbag has good air and pressure retention capabilities, ensuring that the curtain airbag still has a certain pressure after a vehicle collision, thereby improving the safety factor of the vehicle.
[0007] Optionally, a connecting piece is provided extending outward from the positioning and sewing protrusions in the air bag lining, the connecting piece is symmetrical about the folding line, connecting holes are provided on the connecting piece, and after the air bag lining is folded along the folding line, horizontal overlapping straight edges formed by the connecting piece are fixed by sewing with a single sewing thread.
[0008] Optionally, after the airbag reinforcement sheet, the airbag lining sheet and the air guide sheet are laid flat and stacked, the edges of the overlapping areas are sewn and fixed into an integrated structure by sewing thread.
[0009] Optionally, the airbag reinforcement sheet is composed of a first reinforcement sheet and a second reinforcement sheet stacked together, and the outer contour of the airbag reinforcement sheet is in a contoured structure with the outer contour of the airbag lining sheet.
[0010] Optionally, the airbag reinforcement sheet contacts the generator and wraps the air outlet of the generator.
[0011] Optionally, the airbag reinforcement sheet, the airbag lining sheet and the air guide sheet are all textile fabrics with a coating, and after being folded along a folding line, the coating side is located on the inner side.
[0012] Optionally, the positioning and sewing protrusions are triangular or semicircular. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute a limitation of the present invention. In the drawings:
[0014] Figure 1 A schematic diagram of the unfolding structure of the air bag reinforcement sheet provided by the utility model;
[0015] Figure 2 A schematic diagram of the unfolded structure of the air bag lining provided by the utility model;
[0016] Figure 3 A schematic diagram of the unfolded structure of the air guide plate provided by the utility model;
[0017] Figure 4 This is a schematic diagram of the semi-finished structure of the gas guide device provided by the utility model after being stacked;
[0018] Figure 5 for Figure 4 Schematic diagram of the structure after folding and sewing along the folding line;
[0019] Figure 6 This is a schematic diagram of the assembly structure of the gas guide device and the generator provided by the utility model.
[0020] Among them, the airbag reinforcement sheet 10, the first reinforcement sheet 101, the second reinforcement sheet 102, the airbag lining 20, the connecting hole 201, the air guide sheet 30, the folding line 40, the first sewing line 50, the second sewing line 60, the single sewing line 70, the generator bracket 80, the first clamp 90, the first clamp 100, the generator 200, the opening 300, the flange 400, and the notch 500. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with the implementation mode and the accompanying drawings. Here, the schematic implementation mode of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.
[0022] See also Figure 1-Figure 6 The utility model provides an air guide device for a curtain airbag, comprising an airbag reinforcement sheet 10, an airbag lining sheet 20 and an air guide sheet 30. The airbag reinforcement sheet 10, the airbag lining sheet 20 and the air guide sheet 30 are all provided with positioning and sewing protrusions, and the positioning and sewing protrusions are symmetrically structured with a folding line 40. The airbag reinforcement sheet 10, the airbag lining sheet 20 and the air guide sheet 30 are laid flat and stacked from top to bottom in a manner that the positioning and sewing protrusions are aligned, and after being laid flat and stacked, they are folded along the folding line 40 to form a folded structure. In the folded structure, the interfaces of the overlapping areas of the air guide sheet 30 and the airbag lining sheet 20 along the folding direction are sewn and fixed by sewing thread to form a sealed channel with an opening 300; the positioning and sewing protrusions in the airbag lining sheet 20 are provided with a connecting hole 201 for the generator bracket to pass through, and the horizontal overlapping straight edges formed by the positioning and sewing protrusions after the airbag lining sheet 20 is folded along the folding line 40 are sewn and fixed by a single sewing thread 70.
[0023] In implementation, see Figure 1-Figure 3The positioning and sewing protrusions in the airbag reinforcement sheet 10, the airbag lining sheet 20 and the air guide sheet 30 are used for stacking positioning and sewing fixation, and include a flange 400 and a notch 500. The flanges 400 are all located on the same side. The notch 500 in the airbag reinforcement sheet 10 is located on the opposite side of the flange 400. The notches 500 are connected on both sides of the flange 400 in the airbag lining sheet 20 and the air guide sheet 30, and the notches 500 are arranged on the opposite side of the flange 400. When making, the airbag reinforcement sheet 10, the airbag lining sheet 20 and the air guide sheet 30 with positioning and sewing protrusions are cut out according to the structure shown in the figure using textiles. The three are positioned and laid flat by the protrusions from top to bottom in order, and then the overlapping areas of the three are sewn and fixed, such as Figure 4 The dotted line portion is the sewing line; the airbag reinforcement sheet 10, the airbag lining sheet 20 and the air guide sheet 30 are folded in half along the folding line 40 after being fixedly connected, and the interface of the area folded in half and overlapping along the folding line 40 is sewn and connected to form a closed channel with three openings 300, such as Figure 5 As shown, the side edges of the airbag lining 20 and the air guide plate 30 are sewn together with the first sewing thread 50, and the notch position of the airbag lining 20 is sewn together with the second sewing thread 60. The interface positions at these two locations are subject to greater airflow impact during the deployment of the curtain airbag, and the second sewing thread 60 is at a bend. With the impact of the airflow and the stress concentration, multiple layers of sewing threads are required for reinforced sewing; the horizontally overlapping straight edges formed by the flange of the airbag lining 20 are sewn and fixed by a single sewing thread 70.
[0024] In a specific implementation, see Figure 2 , a connecting piece is provided extending outward from the positioning and sewing protrusion in the airbag lining 20, and the connecting piece is symmetrically structured with the folding line 40. The connecting hole 201 is provided on the connecting piece. After the airbag lining 20 is folded along the folding line 40, the horizontal overlapping straight edges formed by the connecting piece are sewn and fixed by a single sewing thread 70; the design of the connecting hole 201 can ensure that when the generator 200, the generator bracket 80 and the air guide device are connected together, the relative position and matching size of the generator 200 relative to the air guide device and the generator bracket 80 are guaranteed, so that the assembly consistency is better; in addition, the turning part of the air guide device is reinforced with multiple sewing threads, and the horizontal straight edge is connected with a single sewing thread 70. The air guide device ensures that there are not too many stitches at the interface, so as to avoid the air guide device and the generator 200 and the generator bracket 80. The gap is too large at the position where the first clamp 90 and the second clamp 100 are clamped, resulting in poor sealing of the entire curtain airbag.
[0025] See also Figure 4 After the airbag reinforcement sheet 10, the airbag lining sheet 20 and the air guide sheet 30 are laid flat and stacked, the edges of the overlapping areas are sewn and fixed into an integrated structure by sewing thread.
[0026] The airbag reinforcement sheet 10 can be composed of a first reinforcement sheet 101 and a second reinforcement sheet 102, and the outer contour of the airbag reinforcement sheet 10 is in a contoured structure with the outer contour of the airbag lining sheet 20. The airbag reinforcement sheet 10 is in contact with the generator 200 and the airbag reinforcement sheet 10 wraps the air outlet of the generator 200. The airbag reinforcement sheet 10 plays a role of heat insulation and flame retardancy. According to the impact force of the air outlet of the generator 200, the number of airbag reinforcement sheets 10 can be appropriately increased or decreased.
[0027] The airbag reinforcement sheet 10 , the airbag lining sheet 20 and the air guide sheet 30 are all textile fabrics with coatings, and after being folded along the folding line 40 , the coating side is located on the inner side.
[0028] The positioning and sewing protrusions are triangular or semicircular.
[0029] The solution provided by the utility model is that the airbag lining in the air guide device is folded along the folding line to be positioned and the horizontal overlapping straight edges formed by the sewing protrusions are sewn by a single sewing thread, that is, the sewing thread at the clamping position of the clamp in the bracket is reduced, so that the generator, the air guide device and the clamp fit more closely, the sealing is better and the pressure is stable; the connection holes are added in the airbag lining to ensure the relative positions of the air guide device, the generator and the bracket for assembly, and the matching size consistency is better, so that the curtain airbag has good air and pressure retention capabilities, ensuring that the curtain airbag still has a certain pressure after a vehicle collision, thereby improving the safety factor of the vehicle.
[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims
1. An air guide device for a curtain airbag, comprising an airbag reinforcement sheet, an airbag lining sheet and an air guide sheet, characterized in that: The airbag reinforcement sheet, airbag lining sheet and air guide sheet are all provided with positioning and sewing protrusions, and the positioning and sewing protrusions are symmetrical with the folding line. The airbag reinforcement sheet, airbag lining sheet and air guide sheet are stacked flat from top to bottom with the positioning and sewing protrusions aligned, and after being stacked flat, they are folded along the folding line to form a folded structure. In the folded structure, the interfaces of the overlapping areas of the air guide sheet and the airbag lining along the folding direction are sewn and fixed by sewing thread to form a sealed channel with an opening; the positioning and sewing protrusions in the airbag lining are provided with connecting holes for the generator bracket to pass through, and the horizontal overlapping straight edges formed by the positioning and sewing protrusions after the airbag lining is folded along the folding line are sewn and fixed by a single sewing thread.
2. The air guide device for a curtain airbag according to claim 1, characterized in that: A connecting piece is provided outwardly extending from the positioning and sewing protrusion in the air bag lining, and the connecting piece is symmetrically structured along the folding line. The connecting holes are provided on the connecting piece. After the air bag lining is folded along the folding line, the horizontal overlapping straight edges formed by the connecting piece are sewn and fixed by a single sewing thread.
3. The air guide device for a curtain air bag according to claim 1, characterized in that: After the airbag reinforcement sheet, the airbag lining sheet and the air guide sheet are laid flat and stacked, the edges of the overlapping areas are sewn and fixed into an integrated structure by sewing thread.
4. The air guide device for a curtain air bag according to claim 1, characterized in that: The airbag reinforcement sheet is composed of a first reinforcement sheet and a second reinforcement sheet stacked together, and the outer contour of the airbag reinforcement sheet is in a contoured structure with the outer contour of the airbag lining sheet.
5. The air guide device for a curtain air bag according to claim 1, characterized in that: The airbag reinforcement sheet is in contact with the generator and wraps the air outlet of the generator.
6. The air guide device for a curtain air bag according to claim 1, characterized in that: The airbag reinforcement sheet, the airbag lining sheet and the air guide sheet are all textiles with coatings, and after being folded along the folding line, the coating side is located on the inner side.
7. The air guide device for a curtain air bag according to claim 1, characterized in that: The positioning and sewing protrusions are triangular or semicircular.