Center airbag

Abstract

The present invention relates to the field of automobile safety, and specifically to a central airbag, comprising a main airbag, a secondary airbag and a drawstring. After the main airbag is inflated and deployed, the side close to the occupant is a vertical plane, and the bottom of the side away from the occupant has an inner concave portion, and the inner concave portion is adapted to a central armrest box to form a 2.5D medium D structure, so that when the occupant collides with the main airbag, the main airbag can effectively support the occupant with the support of the central armrest box; the secondary airbag is arranged in the upper half of the main airbag, and the secondary airbag is connected to the main airbag through an exhaust hole. After the secondary airbag is inflated, it is deployed horizontally toward the occupant to effectively support the occupant's head; the drawstring is arranged on the side of the main airbag close to the occupant, and the length of the drawstring is less than the length of the main airbag positioning, so as to avoid the main airbag from deflecting when the occupant collides with the main airbag, thereby improving the protection effect.

Description

Technical Field

[0001] The invention relates to the technical field of automobile safety, in particular to a central airbag. Background Art

[0002] The central airbag is an auxiliary protection device in the vehicle airbag system. When the vehicle collides with an obstacle from the side during driving, the airbag system is activated. The gas generator will inflate the airbag, causing it to instantly pop out and expand into a flexible buffer body that acts as a cushion. This reduces the impact force on the driver and front passenger before their heads, bodies and other parts collide, thereby reducing injuries to the occupants.

[0003] Currently, due to the large and empty space between the driver's seat and the front passenger seat, the existing central airbag lacks effective support after deployment, resulting in low support and poor protection for the occupants after colliding with the central airbag. Summary of the invention

[0004] In view of the above problems, an embodiment of the present invention provides a central airbag.

[0005] A central airbag provided by an embodiment of the present invention comprises a main airbag, a secondary airbag and a drawstring. After the main airbag is inflated and deployed, the side close to the occupant is a vertical plane, and the bottom of the side away from the occupant has an inner concave portion, and the inner concave portion is adapted to the central armrest box to form a 2.5D medium D structure, so that when the occupant hits the main airbag, the main airbag can effectively support the occupant with the central armrest box as support;

[0006] The auxiliary airbag is arranged in the upper area of ​​the main airbag. The auxiliary airbag is connected to the main airbag through the exhaust hole. After the auxiliary airbag is inflated, it is deployed horizontally toward the occupant to effectively support the occupant's head.

[0007] The drawstring is arranged on the side of the main airbag close to the occupant, and the length of the drawstring is shorter than the length of the main airbag positioning, so as to prevent the main airbag from being deflected when the occupant hits the main airbag.

[0008] Compared with the prior art, the beneficial effects of the present invention are: the main airbag forms a 2.5D medium D structure after inflation, so that when the occupant collides with the main airbag, the main airbag can effectively support the occupant with the help of the central armrest box; the inflated auxiliary airbag effectively supports the occupant's head and effectively protects the occupant; the drawstring is arranged on the side of the main airbag close to the occupant, which can prevent the main airbag from being deflected after being hit by the occupant, resulting in the airbag failing to effectively protect the occupant, thereby improving the protection effect.

[0009] Optionally, the main airbag bag piece used to make the main airbag has a structure that is wide at the top and narrow at the bottom, and the main airbag bag piece has a symmetrical structure about its own vertical center line. The main airbag bag piece is folded in half about the vertical center line, and the edges are sewn with sewing thread to make the main airbag.

[0010] Optionally, the main airbag bag piece has an inverted convex structure as a whole, and a V-shaped notch is provided at the top edge of the main airbag bag piece and symmetrically about the vertical center line. When making the main airbag, the main airbag bag piece is first folded in half along the vertical center line, and the vertical side edges are sewn with sewing thread after the folding. Thereafter, the vertical center line is aligned with the vertical sewing line, and the top and bottom edges are sewn with sewing thread respectively, thereby forming a main airbag with a certain curvature on the top.

[0011] Optionally, an exhaust hole is provided in the middle of the upper portion of the main airbag bag sheet.

[0012] Optionally, a gas generator fixing structure is provided at the lower portion of the main airbag bag sheet, and the gas generator fixing structure includes a fixing belt and a mounting hole.

[0013] Optionally, the auxiliary airbag has a trapezoidal structure that is wide at the front and narrow at the back to prevent the occupant's head from slipping out of the auxiliary airbag during a collision.

[0014] Optionally, the auxiliary airbag bag sheet used to make the auxiliary airbag is in the shape of a polygon formed by two right-angled trapezoids overlapping and connected with the hypotenuse, wherein the top side of the first right-angled trapezoid is longer than the top side of the second right-angled trapezoid; when making the auxiliary airbag, the auxiliary airbag bag sheet is folded along the hypotenuse, and the overlapping edges of the top side of the first right-angled trapezoid and the top side of the second right-angled trapezoid, and the overlapping edges of the bottom side of the first right-angled trapezoid and the second right-angled trapezoid are sewn with sewing thread, and then the right-angled side of the first right-angled trapezoid is turned toward the right-angled side of the second right-angled trapezoid and sewn with sewing thread, thereby forming a auxiliary airbag with an offset sewing thread structure to prevent the occupant's head from coming into contact with the sewing thread and being injured during a collision.

[0015] Optionally, an exhaust hole is provided in the first right-angled trapezoid near the right-angle side.

[0016] Optionally, the drawstring includes a ∠-shaped drawstring and a one-shaped drawstring, the one-shaped drawstring is equal in length to one side of the ∠-shaped drawstring, and both are horizontally arranged in the main airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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:

[0018] Figure 1 A front view of the positional relationship between the central airbag provided by an embodiment of the present invention and the occupant after being inflated and deployed in a real vehicle;

[0019] Figure 2A top view of the positional relationship between the central airbag provided by an embodiment of the present invention and the occupant after being inflated and deployed in a real vehicle;

[0020] Figure 3 A schematic diagram of the inflation and deployment state of the central airbag provided by an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the inflation and deployment of a main airbag provided in an embodiment of the present invention;

[0022] Figure 5 Schematic diagram of the main airbag bag sheet provided in an embodiment of the present invention, wherein Figure a is a schematic diagram of the overall structure of the main airbag bag sheet, Figure b is a schematic diagram of the main airbag bag sheet after being folded in half along the vertical center line and sewn, and Figure c is a schematic diagram of the main airbag bag sheet after being finally sewn and formed;

[0023] Figure 6 Schematic diagram of the auxiliary airbag bag piece provided in an embodiment of the present invention, wherein Figure d is a schematic diagram of the overall structure of the auxiliary airbag bag piece, and Figure e is a schematic diagram of the auxiliary airbag bag piece after final sewing and forming;

[0024] Figure 7 Schematic diagram of a drawstring provided in an embodiment of the present invention, wherein figure f is a schematic diagram of the drawstring installation state, and figure g is a schematic diagram of two drawstring structures.

[0025] Among them, 1. main airbag; 2. auxiliary airbag; 3. pull strap; 4. occupant; 5. central armrest box; 6. exhaust hole; 7. main airbag bag piece; 8. V-shaped notch; 9. vertical sewing line; 10. gas generator fixing structure; 11. auxiliary airbag bag piece; 12. ∠-shaped pull strap; 13. I-shaped pull strap. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0027] See also Figure 1-Figure 7 A central airbag provided by an embodiment of the present invention comprises a main airbag 1, a secondary airbag 2 and a drawstring 3. After the main airbag 1 is inflated and deployed, the side close to the occupant 4 is a vertical plane, and the bottom of the side away from the occupant 4 has an inner concave portion, which is adapted to the central armrest box 5 to form a 2.5D medium D structure, so that when the occupant 4 hits the main airbag 1, the main airbag 1 can effectively support the occupant 4 with the central armrest box 5 as support;

[0028] The auxiliary airbag 2 is arranged in the upper area of ​​the main airbag 1. The auxiliary airbag 2 is connected to the main airbag 1 through the exhaust hole 6. After the auxiliary airbag 2 is inflated, it is horizontally deployed toward the occupant 4 to effectively support the head of the occupant 4.

[0029] The drawstring 3 is arranged on the side of the main airbag 1 close to the occupant 4 , and the length of the drawstring 3 is shorter than the positioning length of the main airbag 1 , so as to prevent the main airbag 1 from deflecting when the occupant 4 hits the main airbag 1 .

[0030] In implementation, see Figure 1 and Figure 3 , the dimensions B and C of the inner concave portion of the main airbag 1 can be adjusted and designed according to the width and height of the central armrest box 5, so that the main airbag 1 can be effectively supported by the central armrest box 5 to prevent the airbag from deflecting; see Figure 2 and Figure 3 The auxiliary airbag 2 is designed as a trapezoidal structure that is wide in the front and narrow in the rear, that is, the dimension D in the front direction of the vehicle is larger than the dimension E in the rear direction of the vehicle, to prevent the head of the moving occupant 4 from slipping out of the airbag during a collision. In addition, adjusting the length of the dimension F of the auxiliary airbag 2 can meet the protection requirements for the occupant 4 under different collision degrees.

[0031] Specifically, the main airbag bag piece 7 used to make the main airbag 1 has a structure that is wide at the top and narrow at the bottom. The main airbag bag piece 7 has a symmetrical structure about its own vertical center line. The main airbag bag piece 7 is folded in half about the vertical center line and the edges are sewn with sewing thread to form the main airbag 1.

[0032] In one implementation, the main airbag bag sheet 7 is in an inverted convex shape as a whole, and a V-shaped notch 8 is provided at the top edge of the main airbag bag sheet 7 and symmetrically with the vertical center line. When manufacturing the main airbag 1, the main airbag bag sheet 7 is first folded in half with the vertical center line, such as Figure 5 After the vertical side edges are folded in half as shown in b, they are sewn together with sewing threads. Figure 5 As shown in c, the vertical center line is aligned with the vertical sewing line 9, and then the top edge and the bottom edge are sewn respectively by sewing threads, so as to form a main airbag 1 with a certain curvature on the top.

[0033] An exhaust hole 6 is provided at the middle position of the upper part of the main air bag sheet 7 .

[0034] A gas generator fixing structure 10 is provided at the lower part of the main airbag sheet 7 , and the gas generator fixing structure 10 includes a fixing belt and a mounting hole.

[0035] The auxiliary airbag 2 is a trapezoidal structure that is wide at the front and narrow at the rear, so as to prevent the head of the occupant 4 from slipping out of the auxiliary airbag 2 during a collision.

[0036] The auxiliary airbag sheet 11 used to make the auxiliary airbag 2 is in a polygonal shape formed by two right-angled trapezoids overlapping and butting together with their hypotenuses, wherein the top side of the first right-angled trapezoid is longer than the top side of the second right-angled trapezoid; when making the auxiliary airbag 2, the auxiliary airbag sheet 11 is folded along the hypotenuse, such as Figure 6As shown in e, the overlapping edges of the top side of the first right-angled trapezoid and the top side of the second right-angled trapezoid, and the overlapping edges of the bottom side of the first right-angled trapezoid and the bottom plate of the second right-angled trapezoid are sewn together with sewing thread, and then the right-angled side of the first right-angled trapezoid is turned toward the right-angled side of the second right-angled trapezoid and sewn with sewing thread, thereby forming a secondary airbag 2 with an offset sewing thread structure to prevent the head of the occupant 4 from being injured by contact with the sewing thread during a collision.

[0037] An exhaust hole 6 is provided near the right-angle side in the first right-angle trapezoid.

[0038] The drawstring 3 includes a ∠-shaped drawstring 12 and a straight-shaped drawstring 13 . The straight-shaped drawstring 13 is equal in length to one side of the ∠-shaped drawstring 12 and is horizontally arranged in the main airbag 1 .

[0039] During implementation, the gas generator is arranged in the main airbag 1 to inflate the internal chamber of the main airbag 1. When the interior of the main airbag 1 is almost full, the gas inflates the auxiliary airbag 2 through the exhaust hole 6 until it is full; after the main airbag 1 is filled with gas and deployed, a 2.5D medium D structure is formed, and the airbag can be effectively supported by the central armrest box 5. The auxiliary airbag 2 is sewn on the upper half of the main airbag 1 to support the head of the occupant 4. When the auxiliary airbag 2 is sewn, the sewing line is designed on the upper side of the chamber, so that the head of the occupant 4 can contact the smooth surface of the auxiliary airbag 2 to avoid secondary injuries caused by sewing lines, cloth edges, etc. The auxiliary airbag 2 is designed as a trapezoidal structure to prevent the head of the moving occupant 4 from slipping out of the airbag during a collision, thereby improving the protection performance; the drawstring 3 is designed to prevent the main airbag 1 from being deflected after being hit by the occupant 4, resulting in the airbag failing to effectively protect the occupant 4, thereby improving the protection performance.

[0040] 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. A central airbag, comprising a main airbag, a secondary airbag and a drawstring, characterized in that: After the main airbag is inflated and deployed, the side close to the occupant is a vertical plane, and the bottom of the side away from the occupant has an inner concave portion, which is adapted to the central armrest box to form a 2.5D medium D structure. Therefore, when the occupant hits the main airbag, the main airbag can rely on the central armrest box to form an effective support for the occupant; The auxiliary airbag is arranged in the upper area of ​​the main airbag. The auxiliary airbag is connected to the main airbag through the exhaust hole. After the auxiliary airbag is inflated, it is deployed horizontally toward the occupant to effectively support the occupant's head. The drawstring is arranged on the side of the main airbag close to the occupant, and the length of the drawstring is shorter than the length of the main airbag positioning, so as to prevent the main airbag from being deflected when the occupant hits the main airbag.

2. The center airbag according to claim 1, characterized in that: The main airbag bag piece used to make the main airbag has a structure that is wide at the top and narrow at the bottom. The main airbag bag piece has a symmetrical structure about its own vertical center line. The main airbag bag piece is folded in half about the vertical center line and the edges are sewn with sewing thread to make the main airbag.

3. The center airbag according to claim 2, characterized in that: The main airbag bag piece has an inverted convex structure as a whole, and a V-shaped notch is arranged at the top edge of the main airbag bag piece and symmetrically about the vertical center line. When making the main airbag, the main airbag bag piece is first folded in half along the vertical center line, and after the folding, the vertical side edges are sewn with sewing thread. Thereafter, the vertical center line is aligned with the vertical sewing line, and the top and bottom edges are sewn with sewing thread respectively, thereby forming a main airbag with a certain curvature on the top.

4. The center airbag according to claim 2, characterized in that: An exhaust hole is arranged at the middle position of the upper part of the main air bag sheet.

5. The center airbag according to claim 2, characterized in that: A gas generator fixing structure is arranged at the lower part of the main airbag bag sheet, and the gas generator fixing structure comprises a fixing belt and a mounting hole.

6. The center airbag according to claim 1, characterized in that: The auxiliary airbag has a trapezoidal structure that is wide in the front and narrow in the back, which prevents the occupant's head from slipping out of the auxiliary airbag during a collision.

7. The center airbag according to claim 6, characterized in that: The auxiliary airbag bag sheet used to make the auxiliary airbag is in the shape of a polygon formed by two right-angled trapezoids overlapping and connected with the hypotenuse, wherein the top side of the first right-angled trapezoid is longer than the top side of the second right-angled trapezoid; when making the auxiliary airbag, the auxiliary airbag bag sheet is folded along the hypotenuse, and the overlapping edges of the top side of the first right-angled trapezoid and the top side of the second right-angled trapezoid, and the overlapping edges of the bottom side of the first right-angled trapezoid and the second right-angled trapezoid bottom plate are sewn with sewing thread, and then the right-angled side of the first right-angled trapezoid is turned toward the right-angled side of the second right-angled trapezoid and sewn with sewing thread, thereby forming an auxiliary airbag with an offset sewing line structure to prevent the occupant's head from being injured by contact with the sewing line during a collision.

8. The center airbag according to claim 7, characterized in that: An exhaust hole is arranged near the right angle side in the first right angle trapezoid.

9. The center airbag according to claim 1, characterized in that: The drawstring includes a ∠-shaped drawstring and a one-shaped drawstring. The one-shaped drawstring is equal in length to one side of the ∠-shaped drawstring and both are arranged in a horizontal form in the main airbag.

Images