A cushioning airbag device

Abstract

The present invention discloses a buffer airbag device, including an airbag, a self-inflating port is provided on the bottom surface of the airbag, a film-type exhaust port is provided on the side of the airbag, a plurality of buffer boxes are provided around the self-inflating port, a slide is provided inside the buffer box, a piston plate is provided inside the slide, an upper limit structure and a lower limit structure are provided at both ends of the slide, an opening is provided on the bottom surface of the buffer box, a support plate is provided at the opening of the bottom surface of the buffer box, a buffer spring is fixed on the support plate, the upper end of the buffer spring is connected to the piston plate, hinges are provided on both sides of the opening of the bottom surface of the buffer box, the hinge arms of the hinges are blocked on the outside of the support plate, a breathing hole is provided on the top of the buffer box, and the inside of the buffer box is connected to the inside of the airbag through the breathing hole. The present invention is suitable for airdropping of precision electronic components, etc., increases the buffering effect, is reusable, and can also be modified on the basis of the existing airbag structure, which is simple and easy.

Description

Technical Field

[0001] The invention relates to the technical field of absorbing the landing impact of airdropped items, and in particular to a buffer airbag device. Background Art

[0002] At present, the airdrop of equipment and materials mainly relies on parachutes or parachutes plus cushioning airbags. For example, an airdrop protection system disclosed in Chinese patent CN201420319201.3 includes a parachute, a safety protection device, and the safety protection device includes an airbag, a gas generator, and a collision switch. One end of the airbag is directly or indirectly connected to the carrier of the parachute, and the other end of the airbag is connected to the gas output end of the gas generator. The other end of the gas generator is directly or indirectly connected to the impact switch, which can not only make the airdrop more stable and safer during normal airdrops, but also play a certain protective role for airdrops when the parachute cannot open normally within the set height, and is less affected by wind during airdrops. As long as the overload of equipment and materials during landing is lower than the specified value, the airdrop effect is considered to be good. However, for some materials with very low overload requirements, such as precision electronic components, it is difficult to meet the requirements of the buffering effect using the above method, which may cause the airdrop of materials to fail. In view of this situation, the airdrop method of materials such as precision electronic components needs to be improved. Summary of the invention

[0003] The object of the present invention is to provide a buffer airbag device, including an airbag, a plurality of buffer boxes are arranged at the bottom of the airbag, and the buffer springs and piston plates inside the buffer boxes can increase the buffering effect, thereby improving the safety performance of airdropped precision electronic components.

[0004] In order to achieve the above-mentioned invention objectives, the present invention adopts the following technical scheme: a buffer airbag device, including an airbag, a self-inflation port is provided on the bottom surface of the airbag, a film-type exhaust port is provided on the side of the airbag, a plurality of buffer boxes are provided around the self-inflation port, a slide is provided inside the buffer box, a piston plate is provided inside the slide, an upper limit structure and a lower limit structure are respectively provided at both ends of the slide, an opening is provided on the bottom surface of the buffer box, a support plate is provided at the opening of the bottom surface of the buffer box, a buffer spring is fixed on the support plate, the upper end of the buffer spring is connected to the piston plate, hinges are provided on both sides of the opening of the bottom surface of the buffer box, the hinge arms of the hinge are blocked on the outside of the support plate, a breathing hole is provided on the top of the buffer box, and the interior of the buffer box is connected to the interior of the airbag through the breathing hole.

[0005] Furthermore, the slideway is provided with two guide rails, and the piston plate is provided with two slide grooves, and the two slide grooves are respectively slidably connected to the two guide rails.

[0006] Furthermore, the buffer spring is a truncated cone spiral spring.

[0007] Furthermore, there are four buffer boxes, which are respectively fixed on the four corners of the bottom surface of the airbag.

[0008] Furthermore, there are two hinges, which are symmetrically fixed on both sides of the bottom opening of the buffer box.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. The present invention can increase the buffering effect by installing a buffer box at the bottom of the airbag, and the buffer spring and piston plate inside the buffer box can improve the safety performance of the airdropped precision electronic components.

[0011] 2. The present invention is suitable for airdropping of precision electronic components, etc., increases the cushioning effect, is reusable, and can also be modified on the basis of the existing airbag structure, which is simple and easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the structure of the buffer box;

[0014] Figure 3 is a schematic diagram of the piston plate and the guide rail;

[0015] Figure 4 is a schematic diagram of the buffer box during the descent process of the present invention;

[0016] Figure 5 It is a schematic diagram of the cushion box during landing of the present invention. DETAILED DESCRIPTION

[0017] The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention. That is, the present invention is not limited to the preferred embodiments described, and the scope of the present invention is defined by the claims.

[0018] In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more than two; in addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0020] See also Figure 1 , Figure 2 A buffer airbag device of the present invention comprises an airbag 1, wherein the bottom surface of the airbag 1 is provided with an autonomous inflation port 3, the side surface of the airbag 1 is provided with a film-type exhaust port 4, a plurality of buffer boxes 2 are arranged around the autonomous inflation port 3, a slideway 12 is arranged inside the buffer box 2, a piston plate 15 is arranged inside the slideway 12, an upper limit structure 13 and a lower limit structure 14 are respectively arranged at both ends of the slideway 12, an opening is arranged on the bottom surface of the buffer box 2, a support plate 16 is arranged at the opening of the bottom surface of the buffer box, a buffer spring 5 is fixed on the support plate 16, the upper end of the buffer spring 5 is connected to the piston plate 15, hinges 17 are arranged on both sides of the opening of the bottom surface of the buffer box, the hinge arm of the hinge is blocked on the outside of the support plate 16, a breathing hole 18 is arranged on the top of the buffer box 2, and the interior of the buffer box is connected with the interior of the airbag 1 through the breathing hole 18.

[0021] See also Figure 1 In this embodiment, the airbag 1 has a rectangular shape, and a self-inflating port 3 is provided on the bottom surface of the airbag. When the airbag 1 is descending, the self-inflating port 3 is designed on the bottom surface to realize self-inflating of the airbag from the surrounding atmosphere. A film-type exhaust port 4 is provided on the side of the airbag, and the film-type exhaust port controls the airbag exhaust opening pressure by the strength of the film. In order to control the airbag exhaust opening pressure, it is necessary to cover the exhaust port with a pressure membrane, and a rubber band can be used to tighten the pressure membrane on the exhaust port. Compared with the method of sticking the pressure membrane, this method is easy to operate and reliable to fix. During the airbag cushioning process, when the pressure difference between the inside and outside of the airbag is greater than the strength of the pressure membrane, the pressure membrane is broken. The film-type exhaust port belongs to the scope of the prior art and will not be described in more detail here.

[0022] See also Figure 3 In this embodiment, an upper limit structure 13 and a lower limit structure 14 are respectively provided at both ends of the slideway 12. The upper limit structure and the lower limit structure are steps to limit the stroke of the piston plate in the slideway. Two guide rails 19 are provided on the slideway 12, and two slide grooves 20 are provided on the piston plate 15. The two slide grooves 20 are slidably connected to the two guide rails 19 respectively.

[0023] In this embodiment, the buffer spring 5 is a truncated cone scroll spring. The truncated cone scroll spring is also called a bamboo shoot spring or a pagoda spring. The truncated cone scroll spring has small volume, large load and variable stiffness. It is widely used in small space, large load occasions and shock absorbing devices.

[0024] In this embodiment, there are four buffer boxes 2 , which are respectively fixed on the four corners of the bottom surface of the airbag 1 .

[0025] In this embodiment, there are two hinges 17, which are symmetrically fixed on both sides of the bottom opening of the buffer box.

[0026] See also Figure 4 , Figure 5 The airbag 1 is usually installed directly below the airdropped supplies, and a parachute is usually provided above the airdropped supplies. The presence of the parachute can adjust the falling posture of the airdropped supplies, which is conducive to the bottom surface of the airbag contacting the ground in a posture parallel to the ground. Four buffer boxes 2 are installed at the four corners of the bottom surface of the airbag 1. The buffer box 2 and the airbag 1 are heat-sealed by a rubber-coated joint. A slideway 12 of a certain height and depth is provided at a symmetrical position on the upper edge of the inner wall 11 of the buffer box 2, a piston plate 15 is provided at the upper end of the buffer spring 5, and a support plate 16 is provided at the lower end. The two end grooves 20 of the piston plate 15 can move freely up and down on the guide rail 19 on the slideway 12, and an upper limit structure 13 is provided at the top of the slideway 12, and a lower limit structure 14 is provided at the bottom. The positions of the upper limit structure 13 and the lower limit structure 14 are also the limit positions to which the buffer spring 5 can move. When the buffer box 2 is not opened, the piston plate 15 in the buffer box 2 is pressed by the buffer spring 5 against the position of the upper limit structure 13 of the slideway 12. In actual use, first, once the airdropped materials enter the atmosphere, the materials will be decelerated under the action of the parachute. Since the four buffer boxes have a certain weight, the airbag 1 arranged below the airdropped materials can maintain a cubic shape during the descent process, and no additional air source is required for inflation. Autonomous inflation from the surrounding atmosphere can be achieved through the autonomous inflation port 3 arranged at the bottom of the airbag 1. When the air pressure in the airbag 1 reaches a certain pressure, the airflow will enter the buffer box 2 through the breathing hole 18 arranged at the top of the buffer box 2. At this time, the force acting on the piston plate 15 is equal to the product of the gas pressure entering the buffer box and the area of ​​the piston plate 15. This force is greater than the sum of the force of the hinge 17 and the compression storage capacity of the buffer spring 5. The hinge 17 will move from the horizontal position to the vertical position, and then release the support plate 16. The released support plate 16 will drive the buffer spring 5 in the compressed state to extend out of the buffer box. Under the action of gravity and spring compression energy, the piston plate 15 will also slide between the upper limit structure 13 and the lower limit structure 14 in the slide 12 until the support plate 16 at the lower end of the buffer spring 5 contacts the ground and collides. During the collision, since the buffer spring 5 is retractable and the piston plate 15 above the buffer spring 5 can move freely up and down inside the slide 12, the energy during the collision can be greatly absorbed. In addition, the airbag 1 itself can also release part of the energy through the film exhaust port 4 during the compression process, which ultimately reduces the overload of precision electronic components to an extremely low level, achieving the purpose of safe airdrop. In addition, the buffer box 2 can be reused after the buffering is completed, which has good economic benefits.

[0027] The present invention installs a buffer box at the bottom of the airbag, which has a simple structure and is reusable. It is suitable for airbags with different structures, especially suitable for airdropping of precision components, and has increased buffering effect and universality.

[0028] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A cushioning airbag device, comprising an airbag (1), characterized in that: The bottom surface of the airbag (1) is provided with an autonomous inflation port (3), the side surface of the airbag (1) is provided with a film-type exhaust port (4), a plurality of buffer boxes (2) are provided around the autonomous inflation port (3), a slideway (12) is provided inside the buffer box (2), a piston plate (15) is provided inside the slideway (12), an upper limit structure (13) and a lower limit structure (14) are provided at both ends of the slideway (12), an opening is provided on the bottom surface of the buffer box (2), a support plate (16) is provided at the opening of the bottom surface of the buffer box, a buffer spring (5) is fixed on the support plate (16), the upper end of the buffer spring (5) is connected to the piston plate (15), hinges (17) are provided on both sides of the opening of the bottom surface of the buffer box, the hinge arms of the hinges are blocked on the outside of the support plate (16), a breathing hole (18) is provided on the top of the buffer box (2), and the interior of the buffer box is connected to the interior of the airbag (1) through the breathing hole (18); There are four buffer boxes (2), which are respectively fixed on the four corners of the bottom surface of the airbag (1); there are two hinges (17), which are symmetrically fixed on both sides of the opening of the bottom surface of the buffer box.

2. The cushioning airbag device according to claim 1, characterized in that: The slideway (12) is provided with two guide rails (19), and the piston plate (15) is provided with two slide grooves (20), and the two slide grooves (20) are respectively slidably connected to the two guide rails (19).

3. A cushioning airbag device according to claim 1 or 2, characterized in that: The buffer spring (5) is a truncated cone scroll spring.

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