A safety airbag

Abstract

The present invention discloses an airbag, which belongs to the field of aviation lifesaving. The airbag includes a bag body and an air nozzle assembly. The bag body has a cavity, and the bag body has a through hole, and the through hole is connected to the cavity. The air nozzle assembly includes a connecting joint, an air guide cap and a buffer curtain, one end of the connecting joint is inserted into the through hole, the air guide cap is sleeved on one end of the connecting joint, and the air guide cap is located in the cavity, the air guide cap has an air guide hole, the axis of the air guide hole is perpendicular to the axis of the connecting joint, and the air guide hole is respectively connected to the inner hole of the connecting joint and the cavity, the middle part of the buffer curtain is sleeved on the connecting joint, the buffer curtain is located in the cavity, and the outer edge of the buffer curtain is arranged around the air guide cap. An airbag provided by an embodiment of the present invention can adjust the air intake direction to be opposite to the buffer curtain during the inflation process, so as to buffer the high-pressure and high-speed gas through the buffer curtain to avoid damage to the airbag.

Description

Technical Field

[0001] The invention belongs to the field of aviation lifesaving, and more specifically, relates to a safety airbag. Background Art

[0002] Modern field military drones and helicopters are mostly equipped with cushioning airbags and anti-fall cushioning airbags. When the airbags are instantly deployed under high-pressure inflation, they can provide a support pad for cushioned landing, thereby avoiding the occurrence of safety accidents.

[0003] In the related art, the airbag needs to be tested for sealing performance before leaving the factory, specifically by inflating the airbag to determine whether the airbag meets the factory standards. After the test is completed, the airbag needs to be vented and then packaged for transportation to facilitate transportation.

[0004] However, during the above-mentioned process of inflating the airbag, the high-pressure and high-speed gas at the air inlet will spray and impact the inner wall of the airbag, causing damage to the airbag. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a safety airbag, the purpose of which is to adjust the air intake direction to be opposite to the buffer curtain during the inflation process, so as to buffer the high-pressure and high-speed gas through the buffer curtain to avoid damage to the airbag.

[0006] The present invention provides a safety airbag, the safety airbag comprising a bag body and an air nozzle assembly;

[0007] The capsule body has a cavity therein, and the capsule body has a through hole, and the through hole is connected to the cavity;

[0008] The air nozzle assembly includes a connecting joint, an air guide cap and a buffer curtain, one end of the connecting joint is inserted in the through hole, the air guide cap is sleeved on one end of the connecting joint, and the air guide cap is located in the cavity, the air guide cap is provided with an air guide hole, the axis of the air guide hole is perpendicular to the axis of the connecting joint, and the air guide hole is respectively connected to the inner hole of the connecting joint and the cavity, the middle part of the buffer curtain is sleeved on the connecting joint, the buffer curtain is located in the cavity, and the outer edge of the buffer curtain is arranged around the air guide hole.

[0009] Optionally, the buffer curtain has a plurality of exhaust holes, and the plurality of exhaust holes are arranged at intervals along the circumference of the buffer curtain.

[0010] Optionally, the end surface of the buffer curtain facing the air guide cap has a plurality of cords arranged at intervals.

[0011] Optionally, an outer peripheral wall at one end of the connecting joint has a first external thread, an inner wall of the air guide cap has an internal thread, and the first external thread and the internal thread cooperate with each other.

[0012] Optionally, the outer peripheral wall of the air guide cap has a coaxially arranged outer flange, and the buffer curtain is sandwiched between the outer flange and the bladder.

[0013] Optionally, the connecting joint includes a first shaft tube and a second shaft tube, the first shaft tube and the second shaft tube are coaxially connected, the outer diameter of the first shaft tube is greater than the outer diameter of the second shaft tube, and the second shaft tube is inserted in the through hole.

[0014] Optionally, the outer peripheral wall of the first shaft tube has a second external thread for connecting to a ventilation device.

[0015] Optionally, the buffer curtain fabric is a woven fabric, a non-woven fabric or a meltblown fabric.

[0016] Optionally, a sealing cloth is provided on the outer wall of the bladder body, one end of the connecting joint passes through the sealing cloth, and the sealing cloth and the bladder body are heat-sealed together.

[0017] Optionally, the connecting joint and the air guide cap are stainless steel structural parts.

[0018] The technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0019] For an airbag provided by an embodiment of the present invention, when the airbag is inflated, the ventilation device is connected to the top of the connecting joint, so that high-pressure and high-speed gas is filled into the cavity of the bag body through the ventilation device. During the inflation process, the gas will pass through the inner hole of the connecting joint and the air guide hole of the air guide cap in turn. Due to the effect of gravity, the outer edge of the buffer curtain will be arranged around the air guide cap and arranged opposite to the air guide hole to avoid the gas outlet direction directly facing the inner wall of the bag body. In this way, the gas discharged from the air guide hole can directly act on the buffer curtain, avoiding the gas from being directly ejected and impacting the bag body, thereby preventing damage to the airbag.

[0020] That is to say, an airbag provided by an embodiment of the present invention can adjust the air intake direction to be opposite to the buffer curtain during the inflation process, so as to buffer the high-pressure and high-speed gas through the buffer curtain to avoid damage to the airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a safety airbag provided by an embodiment of the present invention;

[0022] Figure 2 is a partial cross-sectional view of an airbag provided by an embodiment of the present invention;

[0023] Figure 3 is a cross-sectional view of an air guide cap provided by an embodiment of the present invention;

[0024] Figure 4 It is a bottom view of another safety airbag provided by an embodiment of the present invention.

[0025] The symbols in the figure mean the following:

[0026] 1. bladder body; 11. cavity; 12. through hole; 13. sealing cloth; 2. air nozzle assembly; 21. connecting joint; 211. first external thread; 212. first shaft tube; 2121. second external thread; 213. second shaft tube; 22. air guide cap; 221. air guide hole; 222. internal thread; 223. external flange; 23. buffer curtain; 231. exhaust hole; 232. rope tendon. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] Figure 1 is a schematic diagram of the structure of a safety airbag provided by an embodiment of the present invention, such as Figure 1 As shown, the safety airbag comprises a bag body 1 and an air nozzle assembly 2 .

[0029] The capsule 1 has a cavity 11 therein and a through hole 12 on the capsule 1 . The through hole 12 is communicated with the cavity 11 .

[0030] Figure 2 is a partial cross-sectional view of an airbag provided by an embodiment of the present invention, Figure 3 is a cross-sectional view of the air guide cap provided by an embodiment of the present invention, combined with Figure 2 and Figure 3 As shown, the air nozzle assembly 2 includes a connecting joint 21, an air guide cap 22 and a buffer curtain 23, one end of the connecting joint 21 is inserted in the through hole 12, the air guide cap 22 is sleeved on one end of the connecting joint 21, and the air guide cap 22 is located in the cavity 11, and the air guide cap 22 has an air guide hole 221, the axis of the air guide hole 221 is perpendicular to the axis of the connecting joint 21, and the air guide hole 221 is respectively connected to the inner hole of the connecting joint 21 and the cavity 11, the middle part of the buffer curtain 23 is sleeved on the connecting joint 21, the buffer curtain 23 is located in the cavity 11, and the outer edge of the buffer curtain 23 is surrounded by the air guide hole 221.

[0031] For an airbag provided in an embodiment of the present invention, when the airbag is inflated, the ventilation device is connected to the top of the connecting joint 21, so that high-pressure and high-speed gas is filled into the cavity 11 of the bag body 1 through the ventilation device. During the inflation process, the gas will pass through the inner hole of the connecting joint 21 and the air guide hole 221 of the air guide cap 22 in turn. Due to the effect of gravity, the outer edge of the buffer curtain 23 will be surrounded by the air guide cap 22 and arranged opposite to the air guide hole 221 to prevent the gas from directly facing the inner wall of the bag body 1. In this way, the gas discharged from the air guide hole 221 can directly act on the buffer curtain 23, preventing the gas from directly spraying and impacting the bag body 1, thereby preventing damage to the airbag.

[0032] That is to say, an airbag provided by an embodiment of the present invention can adjust the air intake direction to be opposite to the buffer curtain 23 during the inflation process, so as to buffer the high-pressure and high-speed gas through the buffer curtain 23 to avoid damage to the airbag.

[0033] It should be noted that the shape of the buffer curtain 23 can be a circle or a rotation plane similar to a circle, a square or a polygon.

[0034] In this embodiment, the buffer curtain 23 has a plurality of exhaust holes 231 , and the plurality of exhaust holes 231 are arranged at intervals along the circumference of the buffer curtain 23 .

[0035] In the above embodiment, the exhaust hole 231 can prevent the buffer curtain 23 from blocking the air guide hole 221 during the exhaust process of the airbag body 1, thereby improving the exhaust efficiency and the exhaust and packing efficiency of the safety airbag.

[0036] It is easy to understand that when the bag body 1 is vented in the reverse direction, the buffer curtain 23 tends to gather toward the air guide cap 22, causing the outer edge of the buffer curtain 23 to block the air guide hole 221. By providing the exhaust hole 231, it can be ensured that even when the buffer curtain 23 blocks the air guide hole 221 during the exhaust process, the air guide hole 221 can still be exhausted through the exhaust hole 231, thereby improving the exhaust efficiency.

[0037] Figure 4 is a bottom view of another airbag provided by an embodiment of the present invention, such as Figure 4 As shown, the end surface of the buffer curtain 23 facing the air guide cap 22 has a plurality of spaced-apart rope ribs 232, and the rope ribs 232 can form uneven protrusions on the surface of the buffer curtain 23, thereby also avoiding sealing of the air guide hole 221 during the exhaust process of the buffer curtain 23.

[0038] In other embodiments of the present disclosure, the end surface of the buffer curtain 23 facing the air guide cap 22 may be provided with cloth folds, so that the surface of the buffer curtain 23 also forms uneven protrusions.

[0039] Exemplarily, the buffer curtain 23 can be a woven fabric, a non-woven fabric or a meltblown fabric, all of which have certain structural strength and good air permeability, so that they can not only withstand the impact of high-pressure and high-speed gas, but also effectively avoid blocking the air guide holes 221 during exhaust.

[0040] Illustratively, the textile fabric may be fine canvas, linen, nylon, chemical fiber, composite fiber, or the like.

[0041] In this embodiment, the bladder 1 can be made of polyamide fabric with good crack resistance, which is a semi-hard polymer material that can withstand greater pressure and can reduce the impact force when the bladder 1 is inflated after vulcanization. In addition, in order to increase the sealing performance, the inside of the bladder 1 is coated with a coating material.

[0042] See again Figure 2 and Figure 3 The outer peripheral wall of one end of the connecting joint 21 has a first external thread 211, and the inner wall of the air guide cap 22 has an internal thread 222, and the first external thread 211 and the internal thread 222 cooperate with each other.

[0043] In the above embodiment, the first external thread 211 and the second internal thread 222 cooperate to achieve a stable connection between the connecting joint 21 and the air guide cap 22 , and ensure the air tightness between the two.

[0044] In this embodiment, the outer peripheral wall of the air guide cap 22 has a coaxially arranged outer flange 223 , and the buffer curtain 23 is sandwiched between the outer flange 223 and the bladder body 1 .

[0045] In the above embodiment, through the cooperation between the first external thread 211 and the second internal thread 222 , the buffer curtain 23 can be clamped under the pressure of the outer flange 223 to prevent the buffer curtain 23 from moving.

[0046] Exemplarily, the connecting joint 21 includes a first shaft tube 212 and a second shaft tube 213 , which are coaxially connected, the outer diameter of the first shaft tube 212 is greater than the outer diameter of the second shaft tube 213 , and the second shaft tube 213 is inserted into the through hole 12 .

[0047] In the above embodiment, the first shaft tube 212 serves to connect the ventilation device, and the second shaft tube 213 serves to connect the bladder 1. In addition, the smaller outer diameter of the second shaft tube 213 can effectively reduce the risk of air leakage between the second shaft tube 213 and the bladder 1.

[0048] Exemplarily, the first external thread 211 is located at the inner wall of the second shaft tube 213 .

[0049] Exemplarily, the outer peripheral wall of the first shaft tube 212 has a second external thread 2121 for connecting to the ventilation device, so as to ensure a firm connection between the ventilation device and the connecting joint 21 during inflation.

[0050] In this embodiment, a sealing cloth 13 is provided on the outer wall of the sac body 1, one end of the connecting joint 21 passes through the sealing cloth 13, and the sealing cloth 13 and the sac body 1 are heat-sealed together. The sealing cloth 13 is arranged outside the sac body 1 to seal the gap between the sac body 1 and the connecting joint 21, and can further play a sealing role.

[0051] In addition, the connection joint 21 and the air guide cap 22 are stainless steel structural parts, so that the structural strength of the connection joint 21 and the air guide cap 22 can be increased and their service life can be extended.

[0052] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety airbag, characterized in that: The safety airbag comprises a bag body (1) and an air nozzle assembly (2); The capsule (1) has a cavity (11) therein, and the capsule (1) has a through hole (12), wherein the through hole (12) is in communication with the cavity (11); The air nozzle assembly (2) comprises a connecting joint (21), an air guide cap (22) and a buffer curtain (23); one end of the connecting joint (21) is inserted into the through hole (12); the air guide cap (22) is sleeved on one end of the connecting joint (21), and the air guide cap (22) is located in the cavity (11); the air guide cap (22) has an air guide hole (221); the axis of the air guide hole (221) is perpendicular to the axis of the connecting joint (21), and the air guide hole (221) is connected to the inner hole of the connecting joint (21) and the cavity (11) respectively; the middle part of the buffer curtain (23) is sleeved on the connecting joint (21), and the buffer curtain (23) is located in the cavity (11); the outer edge of the buffer curtain (23) is arranged around the air guide hole (221).

2. The airbag according to claim 1, characterized in that: The buffer curtain (23) is provided with a plurality of exhaust holes (231), and the plurality of exhaust holes (231) are arranged at intervals along the circumference of the buffer curtain (23).

3. The airbag according to claim 1, characterized in that: The end surface of the buffer curtain (23) facing the air guide cap (22) has a plurality of cords (232) arranged at intervals.

4. A safety airbag according to claim 2 or 3, characterized in that: The outer peripheral wall of one end of the connecting joint (21) has a first external thread (211), and the inner wall of the air guide cap (22) has an internal thread (222), and the first external thread (211) and the internal thread (222) cooperate with each other.

5. The airbag according to claim 4, characterized in that: The outer peripheral wall of the air guide cap (22) has a coaxially arranged outer flange (223), and the buffer curtain (23) is sandwiched between the outer flange (223) and the bladder (1).

6. The airbag according to claim 1, characterized in that: The connecting joint (21) comprises a first shaft tube (212) and a second shaft tube (213); the first shaft tube (212) and the second shaft tube (213) are coaxially connected; the outer diameter of the first shaft tube (212) is greater than the outer diameter of the second shaft tube (213); and the second shaft tube (213) is inserted into the through hole (12).

7. The airbag according to claim 6, characterized in that: The outer peripheral wall of the first shaft tube (212) has a second external thread (2121) for connecting to a ventilation device.

8. An airbag according to any one of claims 1 to 3, characterized in that: The buffer curtain fabric (23) is a woven fabric, a non-woven fabric or a melt-blown fabric.

9. An airbag according to any one of claims 1 to 3, characterized in that: A sealing cloth (13) is provided on the outer wall of the bladder body (1), one end of the connecting joint (21) passes through the sealing cloth (13), and the sealing cloth (13) and the bladder body (1) are heat-sealed together.

10. An airbag according to any one of claims 1 to 3, characterized in that: The connecting joint (21) and the air guide cap (22) are stainless steel structural parts.

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