CN221049656U - Safety air bag - Google Patents

Abstract

The utility model relates to the technical field of passive safety of automobiles, in particular to an air bag which comprises an upper cavity and a lower cavity, wherein the upper cavity is communicated with the interior of the lower cavity, a concave structure is arranged on one side of a communicating part of the upper cavity and the lower cavity, which faces an occupant, and the upper cavity is provided with a first convex structure which extends towards the head direction of the occupant. Compared with the prior art, the double-cavity airbag structure is improved by sewing the cut pieces under the condition that the external pull belt is not added, so that the airbag bulge structure I can realize stable support on the head of an occupant, the lateral movement of the occupant in a vehicle during collision is limited, the damage of the head and neck part caused by the lateral movement of the occupant is avoided, the protection performance and manufacturability of the airbag on the occupant are effectively improved, and the production cost is reduced.

Description

Safety air bag

Technical Field

The utility model relates to the technical field of passive safety of automobiles, in particular to an air bag.

Background

In a side collision of a vehicle, there are cases where an occupant collides with the occupant in addition to collisions from both sides of the vehicle, such as between the driver-side seat and the two seats in the same row of the occupant-side seat. Therefore, the passenger car seat is provided with the side seat air bags, and the seat central air bag is also required to be arranged for buffering the hard contact between the driver and the passengers during the collision, so that the injuries of the driver and the passengers during the side collision can be effectively reduced.

Some vehicle types are limited in space environment, such as too low a center console height or even no center console. In such space-constrained vehicle body environments, it is often difficult for a seat center airbag to provide strong support to an occupant.

At present, two solutions for solving the problem of insufficient supporting force of the central airbag exist: one adopts a multi-cavity design, and the other one adopts a plurality of pull belts to restrict the single-cavity air bag, so that the air bag is unfolded to achieve a specific shape. The multi-zone opposite-pulling design of the plurality of pull belts increases the supporting force, and simultaneously increases the weight of the air bag and the design complexity, thereby increasing the manufacturing difficulty and the cost. The multi-cavity airbag has the advantages that the multi-cavity airbag is more stable in occupant protection performance, better in fluctuation control, relatively small in impact on surrounding interior environment and strong in system compatibility.

Patent document CN111699114a discloses a double-cavity air bag realized by sewing and connecting two air bags, between which a plurality of circular through holes are designed. Because the two cavities are formed by connection, the connection area of the two cavities is smaller, and the whole air bag has the defect of insufficient support stability.

Referring to fig. 1, when a side collision occurs in a double-occupant state, since other occupants are beside the occupant 1 and serve as supporting bodies, the support of the double-cavity airbag 2 is realized to a certain extent, the lateral movement of the occupant 1 is small, and the double-cavity airbag can play a certain protection function for the occupant.

Referring to fig. 2, when a side collision occurs in a single-occupant state, since no other occupant beside the occupant 1 is used as a support body, the support force of the airbag is insufficient, which causes the occupant 1 to move too much laterally, and to cross a yellow line L defined in the performance evaluation of the whole vehicle system, the head and neck of the occupant is excessively bent to cause an excessive injury value, and the occupant protection function cannot be well realized.

Therefore, an airbag needs to be designed, and the head and neck of the passenger can be stably supported and protected without an additional supporting body; meanwhile, lateral movement of the passengers in the vehicle during collision is limited, and protection performance of the air bag to the passengers is improved.

Disclosure of utility model

The utility model aims to overcome the defects of the prior art, and provides an air bag which can stably support and protect the head and neck of an occupant without an additional support body; meanwhile, lateral movement of the passengers in the vehicle during collision is limited, and protection performance of the air bag to the passengers is improved.

In order to achieve the above purpose, the utility model is an air bag, which comprises an upper cavity and a lower cavity, wherein the upper cavity is communicated with the interior of the lower cavity, a concave structure I is arranged on one side of a communicating part of the upper cavity and the lower cavity, which faces towards an occupant, and a convex structure I is arranged on the upper cavity and extends towards the head of the occupant.

The upper cavity comprises a first cutting piece assembly, the lower cavity comprises a second cutting piece assembly, and a through hole is formed in the overlapping area of the first cutting piece assembly and the second cutting piece assembly.

The second cut-parts assembly at least comprises a first part and a second part, the first part and the second part are of similar shapes, and the first part and the second part are integrated or separated.

And the second cutting piece component is formed by folding butterfly-shaped cutting pieces in half.

The second cut-parts component comprises an inner drawstring, and the direction of the inner drawstring is vertical to the length direction of the vehicle body after the lower cavity is inflated.

The first cutting piece assembly comprises a first upper cavity cutting piece and a second upper cavity cutting piece, the first upper cavity cutting piece is transversely provided or longitudinally provided with an outwards folded overlapping part I, the side edge of the overlapping part I is fixed by adopting a stitch I, the first upper cavity cutting piece covers the surface of the second upper cavity cutting piece, and after the upper cavity body is inflated, the overlapping part I forms a protruding structure I.

The first protruding structure formed by the longitudinally arranged overlapping part is bent on the surface of the upper cavity, and the bent part is V-shaped, C-shaped, U-shaped or arc-shaped.

The lower side of the first upper cavity cutting piece is fixed with one side of the butterfly cutting piece, which is provided with a through hole, by adopting a second suture, the lower side of the second upper cavity cutting piece is fixed with the two side sides of the butterfly cutting piece by adopting a third suture, the second suture and the third suture are respectively positioned at the two sides of the through hole, and the peripheries of the first upper cavity cutting piece, the second upper cavity cutting piece and the butterfly cutting piece are fixed by adopting a closed line.

The second cutting piece assembly comprises a first lower cavity cutting piece, a second lower cavity cutting piece and a second overlapping portion which is transversely arranged on the first lower cavity cutting piece and is folded outwards, the side edge of the second overlapping portion is fixed by a fourth suture, a plurality of through holes are formed in the edge of one side of the second lower cavity cutting piece, the second lower cavity cutting piece covers the surface of the first lower cavity cutting piece, after the lower cavity is inflated, the second overlapping portion forms a second protruding structure, and the second protruding structure is located at the upper end of one side, far away from an occupant, of the lower cavity.

The first cutting piece assembly comprises a first upper cavity cutting piece and a second upper cavity cutting piece, the first upper cavity cutting piece is transversely provided with an outwards folded overlapping portion III, the side edge of the overlapping portion III is fixed by a suture line five, the second upper cavity cutting piece covers the surface of the first upper cavity cutting piece, after the upper cavity is inflated, the overlapping portion III forms a protruding structure I, two ends of the protruding structure I extend towards the direction of an occupant and form a protruding structure III, and a sunken structure II is arranged between the two protruding structures III.

The lower side edge of the upper cavity cutting piece II is fixed with the lower cavity cutting piece II by adopting a stitching line II, the stitching line II is positioned below the through hole, the lower side edge of the upper cavity cutting piece I is fixed with the upper side edge of the lower cavity cutting piece I and the upper side edge of the upper cavity cutting piece II by adopting a stitching line III, and the peripheries of the upper cavity cutting piece II, the upper cavity cutting piece I, the lower cavity cutting piece II and the lower cavity cutting piece I are fixed by adopting a closed line.

Compared with the prior art, the double-cavity airbag structure is improved by sewing the cut pieces under the condition that the external pull belt is not added, so that the airbag bulge structure I can realize stable support on the head of an occupant, the lateral movement of the occupant in a vehicle during collision is limited, the damage of the head and neck part caused by the lateral movement of the occupant is avoided, the protection performance and manufacturability of the airbag on the occupant are effectively improved, and the production cost is reduced.

Drawings

Fig. 1 is a schematic view of a side collision of a double-passenger whole in the prior art.

Fig. 2 is a schematic diagram of a side collision of a single occupant as a whole in the prior art.

Fig. 3 is a schematic structural view of an airbag according to a first embodiment of the present utility model.

Fig. 4 is a schematic view of a butterfly cut piece and an inner draw tape according to a first embodiment of the present utility model.

Fig. 5 is a schematic view of an upper cavity cut-parts of an upper cavity in accordance with a first embodiment of the present utility model.

Fig. 6 is a schematic diagram of an upper cavity cut-parts of the upper cavity in the first embodiment of the present utility model.

Fig. 7 is a schematic view of a second suture in accordance with the first embodiment of the present utility model.

Fig. 8 is a schematic view of a third suture in accordance with the first embodiment of the present utility model.

Fig. 9 is a schematic view of a closing line in accordance with a first embodiment of the present utility model.

FIG. 10 is a schematic view of an airbag assembly according to a first embodiment of the present utility model.

Fig. 11 is a schematic structural view of an airbag according to a second embodiment of the present utility model.

Fig. 12 is a schematic diagram of an upper cavity cut-parts of an upper cavity in a second embodiment of the present utility model.

FIG. 13 is a schematic view of an airbag assembly according to a second embodiment of the present utility model.

Fig. 14 is a schematic structural view of an airbag according to a third embodiment of the present utility model.

Fig. 15 is a schematic view of a lower cavity cut-parts of the lower cavity in the third embodiment of the present utility model.

Fig. 16 is a schematic diagram of a lower cavity cut-parts of a lower cavity in a third embodiment of the present utility model.

Fig. 17 is a schematic diagram of an upper cavity cut-parts of an upper cavity in the third embodiment of the present utility model.

Fig. 18 is a schematic diagram of an upper cavity cut-parts of an upper cavity in the third embodiment of the present utility model.

FIG. 19 is a schematic view of an airbag assembly according to a third embodiment of the present utility model.

Detailed Description

The utility model will now be further described with reference to the accompanying drawings.

Examples

Referring to fig. 3, the utility model designs an airbag, which comprises an upper cavity and a lower cavity, wherein the upper cavity 3 is communicated with the inside of the lower cavity 4, the lower cavity 4 is supported below the upper cavity 3 in the unfolding and expanding state of the airbag, the upper cavity 3 supports the head of an occupant, the lower cavity 4 supports the body of the occupant, a concave structure I5 is arranged on one side, facing the occupant, of the communicating part between the upper cavity 3 and the lower cavity 4, and the upper cavity 3 is provided with a convex structure I31, and the convex structure I31 extends towards the head of the occupant.

The concave structure I5 at the communication part of the upper cavity 3 and the lower cavity 4 is arranged, so that the upper cavity 3 stretches towards the head direction of the passenger in the inflation process, and meanwhile, the structure of the convex structure I31 is matched, so that the head of the passenger can be better supported and protected, and the passenger is prevented from being hurt by the neck and the head in the lateral collision process.

The upper cavity 3 comprises a first cut-part assembly, the lower cavity 4 comprises a second cut-part assembly, and a through hole 43 is formed in the overlapping area of the first cut-part assembly and the second cut-part assembly. The through holes 43 are provided to realize communication between the upper chamber 3 and the lower chamber 4, so that the gas in the lower chamber 4 can enter the upper chamber 3 through the through holes 43.

The second panel assembly at least comprises a first part and a second part, the first part and the second part have similar shapes, and the first part and the second part are integrated or split.

Referring to fig. 4, the lower cavity 4 is an air bag matrix, the second cut-part assembly is formed by folding a butterfly cut-part 42 in half, and the second cut-part assembly further comprises an inner pull belt 41, after the lower cavity 4 is inflated, the direction of the inner pull belt 41 is perpendicular to the length direction of the vehicle body, the thickness of the lower cavity 4 in the Y direction of the vehicle body is adjusted, and the Y direction of the vehicle body is perpendicular to the length direction of the vehicle body.

Referring to fig. 5 and 6, the first panel assembly includes a first upper cavity panel 32 and a second upper cavity panel 33, the first upper cavity panel 32 and the second upper cavity panel 33 have different sizes, in this example, the first upper cavity panel 32 is longitudinally provided with an outwardly folded overlapping portion 321, a side edge of the overlapping portion 321 is fixed by a first suture 61, the first upper cavity panel 32 covers a surface of the second upper cavity panel 33, after the upper cavity 3 is inflated, the overlapping portion 321 forms a first protruding structure 31, the first protruding structure 31 forms a bend 34 on a surface of the upper cavity 3, and the bend 34 is V-shaped, C-shaped, U-shaped or arc-shaped.

The first stitching line 61 constrains the physical dimension of the first upper cavity cut piece 32 in a pre-sewing mode, so that the first upper cavity cut piece 32 can be better attached to the second upper cavity cut piece 33, the subsequent sewing of the air bag assembly is facilitated, and the large-scale production and manufacturing of the air bag with the complex shape are realized.

When side collision occurs, the bending 34 can receive the head of the passenger, so that the head of the passenger is prevented from being damaged due to excessive bending of the head and neck caused by sideslip of the head of the passenger, the head of the passenger is always positioned in the bending 34, the problem that the head of the passenger slides out of the airbag protection area due to the instability of the airbag is solved, and the protection performance of the airbag to the passenger is further improved.

When the air bag assembly is sewn, referring to fig. 7, the lower side edge of the first upper cavity cut-off piece 32 and one side of the butterfly cut-off piece 42 with the through hole 43 are fixed by adopting a second suture thread 62, referring to fig. 8, the lower side edge of the second upper cavity cut-off piece 33 and two side edges of the butterfly cut-off piece 42 are fixed by adopting a third suture thread 63, the second suture thread 62 and the third suture thread 63 are respectively positioned at two sides of the through hole 43, referring to fig. 9, and the peripheries of the first upper cavity cut-off piece 32, the second upper cavity cut-off piece 33 and the butterfly cut-off piece 42 are fixed by adopting a closing line 64, so that the air bag assembly is obtained, as shown in fig. 10.

In the second embodiment, the structure of the lower cavity 4, the structure of the upper cavity cut piece 33 and the sewing mode of the air bag assembly are the same as those of the first embodiment, and the same parts will not be repeated.

Referring to fig. 12 and 6, the upper cavity 3 includes a first upper cavity cut-off sheet 32 and a second upper cavity cut-off sheet 33, the first upper cavity cut-off sheet 32 and the second upper cavity cut-off sheet 33 have different sizes, in this example, the first upper cavity cut-off sheet 32 is laterally provided with an outwardly folded overlapping portion 321, a side edge of the overlapping portion 321 is fixed by a first suture 61, the first upper cavity cut-off sheet 32 covers a surface of the second upper cavity cut-off sheet 33, and after the upper cavity 3 is inflated, the overlapping portion 321 forms a protruding structure 31, as shown in fig. 11.

The airbag assembly is sewn as in the first embodiment, and the sewn airbag assembly is shown in fig. 13.

In the third embodiment, only the differences from the previous embodiments are described, and the description of the same parts will not be repeated.

Referring to fig. 15 and 16, the lower cavity 4 includes a first lower cavity cut-off piece 44, a second lower cavity cut-off piece 45, and an inner pull strap 41, the first lower cavity cut-off piece 44 is transversely provided with a second overlapping portion 441 folded outwards, the side edge of the second overlapping portion 441 is fixed by a fourth suture 65, one side edge of the second lower cavity cut-off piece 45 is provided with a plurality of through holes 43, the second lower cavity cut-off piece 45 covers the surface of the first lower cavity cut-off piece 44, two ends of the inner pull strap 41 are respectively connected with the inner surface of the first lower cavity cut-off piece 44 and the inner surface of the second lower cavity cut-off piece 45, after the lower cavity 4 is inflated, the second overlapping portion 441 forms a second protruding structure 46, and the second protruding structure 46 is located at the upper end of the side of the lower cavity 4 away from the passenger, as shown in fig. 14.

The arrangement of the second protruding structure 46 enables the upper cavity 3 to extend further towards the passenger, and the upper cavity 3 can provide more stable support for the head of the passenger. Meanwhile, the second protruding structure 46 can also provide a certain support for adjacent passengers, and injuries of the adjacent passengers are reduced.

Referring to fig. 17 and 18, the upper cavity 3 includes a first upper cavity cut-off sheet 32 and a second upper cavity cut-off sheet 33, the first upper cavity cut-off sheet 32 is transversely provided with an outwardly folded third overlapping portion 322, the side edge of the third overlapping portion 322 is fixed by a fifth suture 66, the second upper cavity cut-off sheet 33 covers the surface of the first upper cavity cut-off sheet 32, after the upper cavity 3 is inflated, the third overlapping portion 322 forms a first protruding structure 31, two ends of the first protruding structure 31 extend towards the direction of the passenger and form a third protruding structure 36, and a second recessed structure 35 is arranged between the two protruding structures 36.

The first projection 31 is provided to extend the upper chamber 3 further toward the occupant, and two third projections 36 and second recesses 35 are formed thereby. When side collision occurs, the second concave structure 35 can stably support the head of the passenger, avoid the passenger from toppling along the front-back direction of the vehicle body, and furthest reduce the injury of the passenger.

In the sewing process of the air bag assembly, referring to fig. 19, the lower side edge of the upper cavity cut-off piece two 33 and the lower cavity cut-off piece two 45 are fixed by adopting the second stitching line 62, the second stitching line 62 is positioned below the through hole 43, the lower side edge of the upper cavity cut-off piece one 32 and the upper side edge of the lower cavity cut-off piece one 44, and the upper side edge of the upper cavity cut-off piece two 33 are fixed by adopting the third stitching line 63, and the peripheries of the upper cavity cut-off piece two 33, the upper cavity cut-off piece one 32, the lower cavity cut-off piece two 45 and the lower cavity cut-off piece one 44 are fixed by adopting the closing line 64, so as to obtain the air bag assembly.

According to the utility model, under the condition that the external pull belt is not added, the structure of the double-cavity air bag is improved through the stitching of the cut pieces, so that the head of an occupant can be stably supported by the convex structure of the air bag, lateral movement of the occupant in a vehicle during collision is limited, the damage of excessive bending of the head and neck of the occupant caused by the lateral movement is avoided, the protection performance and manufacturability of the air bag to the occupant are effectively improved, and the production cost is reduced.

Claims (11)

1. The utility model provides an air bag, includes cavity, lower cavity, goes up cavity (3) and the inside UNICOM of cavity (4) down, its characterized in that: the side of the communication part of the upper cavity (3) and the lower cavity (4) facing the passenger is provided with a concave structure I (5), the upper cavity (3) is provided with a convex structure I (31), and the convex structure I (31) extends towards the head direction of the passenger.

2. An airbag according to claim 1, wherein: the upper cavity (3) comprises a first cutting piece assembly, the lower cavity (4) comprises a second cutting piece assembly, and a through hole (43) is formed in the overlapping area of the first cutting piece assembly and the second cutting piece assembly.

3. An airbag according to claim 2, wherein: the second cut-parts assembly at least comprises a first part and a second part, the first part and the second part are of similar shapes, and the first part and the second part are integrated or separated.

4. An airbag according to claim 2, wherein: and the second cut piece assembly is formed by folding butterfly cut pieces (42) in half.

5. An airbag according to claim 2, wherein: the second cut-parts component comprises an inner drawstring (41), and the direction of the inner drawstring (41) is vertical to the length direction of the vehicle body after the lower cavity (4) is inflated.

6. An airbag according to claim 2, wherein: the first cutting piece assembly comprises a first upper cavity cutting piece (32) and a second upper cavity cutting piece (33), the first upper cavity cutting piece (32) is transversely provided or longitudinally provided with an outwards folded overlapped part I (321), the side edge of the overlapped part I (321) is fixed by adopting a first suture line (61), the first upper cavity cutting piece (32) covers the surface of the second upper cavity cutting piece (33), and after the upper cavity (3) is inflated, the overlapped part I (321) forms a first protruding structure (31).

7. An airbag according to claim 6, wherein: the first protruding structure (31) formed by the longitudinally arranged first overlapping part (321) forms a bending part (34) on the surface of the upper cavity (3), and the bending part (34) is V-shaped or C-shaped or U-shaped or arc-shaped.

8. An airbag according to claim 4 or 6, wherein: the lower side of the first upper cavity cutting piece (32) and one side of the butterfly cutting piece (42) with the through hole (43) are fixed by adopting a second suture (62), the lower side of the second upper cavity cutting piece (33) and two side sides of the butterfly cutting piece (42) are fixed by adopting a third suture (63), the second suture (62) and the third suture (63) are respectively positioned at two sides of the through hole (43), and the peripheries of the first upper cavity cutting piece (32), the second upper cavity cutting piece (33) and the butterfly cutting piece (42) are fixed by adopting a closing line (64).

9. An airbag according to claim 2, wherein: the second cutting piece assembly comprises a first lower cavity cutting piece (44), a second lower cavity cutting piece (45) and a second overlapping portion (441) which is folded outwards is transversely arranged on the first lower cavity cutting piece (44), a fourth suture (65) is adopted to fix the side edge of the second overlapping portion (441), a plurality of through holes (43) are formed in the edge of one side of the second lower cavity cutting piece (45), the second lower cavity cutting piece (45) covers the surface of the first lower cavity cutting piece (44), after the lower cavity (4) is inflated, the second overlapping portion (441) forms a second protruding structure (46), and the second protruding structure (46) is located at the upper end of one side, far away from the passenger, of the lower cavity (4).

10. An airbag according to claim 2, wherein: the first cutting piece assembly comprises a first upper cavity cutting piece (32) and a second upper cavity cutting piece (33), wherein an outwards folded overlapped part III (322) is transversely arranged on the first upper cavity cutting piece (32), the side edge of the overlapped part III (322) is fixed by a stitch V (66), the second upper cavity cutting piece (33) covers the surface of the first upper cavity cutting piece (32), the overlapped part III (322) forms a protruding structure I (31) after the upper cavity (3) is inflated, two ends of the protruding structure I (31) extend towards the direction of an occupant and form a protruding structure III (36), and a recessed structure II (35) is arranged between the two protruding structures III (36).

11. An airbag according to claim 9 or 10, wherein: the lower side edge of the upper cavity cut-off piece II (33) is fixed with the lower cavity cut-off piece II (45) by adopting a stitch II (62), the stitch II (62) is positioned below the through hole (43), the lower side edge of the upper cavity cut-off piece I (32) is fixed with the upper side edge of the lower cavity cut-off piece I (44) and the upper side edge of the upper cavity cut-off piece II (33) by adopting a stitch III (63), and the peripheries of the upper cavity cut-off piece II (33), the upper cavity cut-off piece I (32), the lower cavity cut-off piece II (45) and the lower cavity cut-off piece I (44) are fixed by adopting a closing line (64).