Flexible stretcher based on inflation reinforcement and foaming fixation

Abstract

The invention relates to the field of stretchers, in particular to a flexible stretcher based on inflation reinforcement and foaming fixation, the flexible stretcher comprises a bearing rod and a bearing face, the bearing face comprises an inflation cavity, a mixing cavity, a supporting cavity and a foaming cavity which are sequentially arranged in the thickness direction, and a first through hole connecting the inflation cavity and the mixing cavity; the second through hole is connected with the inflating cavity and the supporting cavity; the mixing pipeline is connected with the mixing cavity and the foaming cavity; wherein the supporting cavity is provided with ribs which are expanded and shaped when the supporting cavity is filled with compressed air, an independently packaged foaming agent is stored in the mixing cavity in advance, and a packaging bag of the foaming agent is broken when being impacted by the compressed air. According to the embodiment of the invention, the bottom-layer cloth of the flexible stretcher is increased by using an inflation expansion technology, and the head, the trunk and the limbs of the wounded person are restrained by using a foaming fixing technology, so that the wounded person is semi-wrapped and fixed in situ to reduce movement and improve stability, and the stretcher can be quickly disassembled after the wounded person arrives at a medical institution to facilitate subsequent treatment.

Description

Technical Field

[0001] The present invention relates to the field of stretchers, and particularly to a flexible stretcher based on inflation reinforcement and foaming fixation. Background Art

[0002] In the transfer of wounded in complex environments, simple stretchers are often used. The simple stretcher includes lifting poles and a cloth bag. The cloth bag is a sheet made of flexible material, and its two side edges are respectively fixedly connected to a pair of parallel lifting poles. Common lifting poles can be made of rigid materials, such as wood, metal or composite materials. Common cloth bags can be made of flexible and high-strength materials, such as canvas, nylon or other woven materials. Common connection methods between the lifting poles and the cloth bag include sewing, bonding, riveting or other mechanical connection methods.

[0003] Since the cloth bag of the simple stretcher is soft and easily deformed, it is difficult to fix the wounded well, thus prone to secondary injuries. Especially in the cervical, thoracic and lumbar regions, any unnecessary movement and vibration need to be avoided.

[0004] Therefore, the research and development of a safe, stable, convenient and efficient wounded transfer device has become an urgent problem to be solved. Summary of the Invention

[0005] The purpose of the present invention is to provide a flexible stretcher based on inflation reinforcement and foaming fixation to solve the problems that the cloth bag of the simple stretcher is soft, easily deformed, difficult to fix the wounded well, and prone to secondary injuries.

[0006] To solve the above technical problems, the present invention specifically provides the following technical solutions: A flexible stretcher based on inflation reinforcement and foaming fixation, comprising: a bearing rod and a bearing surface. The bearing surface is a sheet made of flexible material, and two side edges of the bearing surface are respectively fixedly connected to a pair of parallel bearing rods; Wherein, the bearing surface includes an inflation chamber, a mixing chamber, a support chamber and a foaming chamber sequentially arranged along the thickness direction, as well as a first through hole connecting the inflation chamber and the mixing chamber, a second through hole connecting the inflation chamber and the support chamber, and a mixing pipeline connecting the mixing chamber and the foaming chamber; Wherein, the support chamber has ribs that expand and take shape when compressed air is filled. The inside of the mixing chamber pre-stores independently packaged foaming agents. The packaging bags of the foaming agents rupture when impacted by compressed air, and the foaming agents enter the foaming chamber for foaming after being mixed in the mixing pipeline.

[0007] Further, the bearing surface includes an inflatable layer, a mixing layer, an intermediate layer, a support layer, and a foaming layer sequentially connected along the thickness direction. An inflatable cavity is formed between the inflatable layer and the mixing layer, a mixing cavity is formed between the mixing layer and the intermediate layer, a support cavity is formed between the intermediate layer and the support layer, and a foaming cavity is formed between the support layer and the foaming layer. The first through hole penetrates the mixing layer, the second through hole penetrates the mixing layer, the intermediate layer, and the support layer, and the mixing pipe penetrates the mixing layer, the intermediate layer, the support layer, and the foaming layer.

[0008] Further, sleeves extending along the length direction are provided at both side edges of the bearing surface, and the sleeves are used to insert the bearing rods. The edges of the inflatable layer, the mixing layer, the intermediate layer, the support layer, and the foaming layer are integrally bonded to the sleeves by hot pressing.

[0009] Further, the ribs are crisscrossed on the bearing surface.

[0010] Further, the inflatable cavity is connected with an air injection nozzle, and the air injection nozzle is used to connect a high-pressure gas cylinder.

[0011] Further, the inflatable cavity includes an inflatable pipe extending along a preset path, and the inflatable pipe sequentially passes through each first through hole and each second through hole.

[0012] Further, the mixing cavity includes a material storage pipe connecting the first through hole and the mixing pipe, and the foaming agent is pre-set inside the material storage pipe.

[0013] Further, the material storage pipes are evenly distributed around the mixing pipe. Each mixing pipe is connected to two or four material storage pipes. Among them, half of the material storage pipes connected to each mixing pipe contain bagged isocyanate, and the other half of the material storage pipes contain bagged polyol.

[0014] Further, a bag breaker is provided at the inlet edge of the mixing pipe, and the packaging bags of the bagged isocyanate and the bagged polyol are damaged when passing through the bag breaker.

[0015] Further, after the foaming cavity is filled with the foaming agent, a human-shaped groove recessed inward is formed on the surface of the foaming cavity away from the support cavity.

[0016] The present application has the following beneficial effects compared with the prior art: Embodiments of the present invention use an inflatable expansion technique to increase the bottom fabric of a flexible stretcher and a foaming fixation technique to restrain the head, torso, and limbs of the injured person, thereby semi - wrapping and fixing the injured person in place to reduce movement, improve stability, and enable the rapid disassembly of the stretcher after arriving at a medical institution for subsequent treatment. Description of the Drawings

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0018] Figure 1 Is a perspective view of an embodiment of the present invention; Figure 2 Is a front view of an embodiment of the present invention; Figure 3 Is Figure 2 A cross - sectional view in the A - A direction of Figure 4 Is an assembly drawing of the bearing surface of an embodiment of the present invention; Figure 5 Is an assembly drawing of the inflatable cavity of an embodiment of the present invention; Figure 6 Is an assembly drawing of the mixing cavity of an embodiment of the present invention; Figure 7 Is an assembly drawing of the support cavity of an embodiment of the present invention; Figure 8 Is an assembly drawing of the foaming cavity of an embodiment of the present invention; The reference numerals in the drawings are respectively represented as follows: 1 - bearing rod; 2 - bearing surface; 21 - inflatable layer; 22 - mixing layer; 23 - intermediate layer; 24 - support layer; 25 - foaming layer; 26 - sleeve; 27 - human - shaped groove; 3 - inflatable cavity; 31 - air injection nozzle; 32 - inflatable pipe; 4 - mixing cavity; 41 - foaming agent; 42 - storage pipe; 5 - support cavity; 51 - rib; 6 - foaming cavity; 7 - first through - hole; 8 - second through - hole; 9 - mixing pipe; 91 - bag breaker. Detailed Embodiments

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] This solution proposes a flexible stretcher based on inflation reinforcement and foaming fixation. Its purpose is to use the inflation expansion technology to increase the bottom fabric of the flexible stretcher, and use the foaming fixation technology to restrain the head, torso and limbs of the wounded, so as to semi-wrap and fix the wounded in place, reduce movement, improve stability, and can quickly disassemble the stretcher after arriving at the medical institution for subsequent treatment. Hereinafter, it is simply referred to as the flexible stretcher.

[0021] Refer to Figure 1 、 Figure 2 、 Figure 3 As shown in, the flexible stretcher includes a load-bearing rod 1 and a load-bearing surface 2. The load-bearing surface 2 is a sheet made of flexible material. The two side edges of the load-bearing surface 2 are respectively fixedly connected to a pair of parallel load-bearing rods 1. Among them, the load-bearing surface 2 includes, in order along the thickness direction: an inflation chamber 3, a mixing chamber 4, a support chamber 5 and a foaming chamber 6, as well as a first through hole 7 connecting the inflation chamber 3 and the mixing chamber 4, a second through hole 8 connecting the inflation chamber 3 and the support chamber 5, and a mixing pipe 9 connecting the mixing chamber 4 and the foaming chamber 6. Among them, the support chamber 5 has ribs 51 that expand and take shape when filled with gas. The inside of the mixing chamber 4 is pre-stored with individually packaged foaming agents 41. The packaging bags of the foaming agents 41 are broken when impacted by compressed air.

[0022] The usage process of the flexible stretcher is briefly as follows: Step 1: Place the load-bearing surface 2 in the retracted or folded state under the wounded.

[0023] Step 2: Connect the compressed gas cylinder to the inflation chamber 3. After the compressed gas passes through the inflation chamber 3 and the first through hole 7 and enters the mixing chamber 4 in sequence, it destroys the packaging of the foaming agent 41 and pushes the foaming agent 41 (such as isocyanate and polyol) into the inside of the mixing pipe 9 to mix with each other, and then enters the foaming chamber 6 through the mixing pipe 9 for foaming, so as to quickly expand and wrap the wounded to form a fixed structure; at the same time, the compressed gas passes through the inflation chamber 3 and the second through hole 8 and enters the support chamber 5 in sequence, so that the support chamber 5 expands and takes shape, thereby increasing the strength of the load-bearing surface 2.

[0024] Step 3: Connect the load-bearing rods 1 to both sides of the load-bearing surface 2 and carry it.

[0025] Step 4: After arriving at the medical institution, release the gas in the support chamber 5 and cut the foaming layer 25 to complete rapid disassembly and handover.

[0026] In addition, a plurality of fixing buckles arranged along the length direction of the bearing surface 2 are connected to the two long sides of the bearing surface 2. The fixing buckles are used to connect the restraint belts spanning both sides of the bearing surface 2, thereby binding the wounded on the bearing surface 2. The fixing buckles are not shown in the figure. Common connection methods between the fixing buckles and the restraint belts include Velcro, snap fasteners, and belt-like structures.

[0027] Front and rear straps are connected to the two short sides of the bearing surface 2. The front and rear straps are not shown in the figure. The lifters can hang the flexible stretcher around the neck through the front and rear straps to assist in transporting the wounded in complex terrains (such as mountains).

[0028] Reference Figure 4 , the specific structure of the bearing surface 2 is described as follows. The bearing surface 2 includes five layers of sheets sequentially connected along the thickness direction, namely an inflatable layer 21, a mixed layer 22, an intermediate layer 23, a support layer 24, and a foaming layer 25. An inflatable cavity 3 is formed between the inflatable layer 21 and the mixed layer 22, a mixed cavity 4 is formed between the mixed layer 22 and the intermediate layer 23, a support cavity 5 is formed between the intermediate layer 23 and the support layer 24, and a foaming cavity 6 is formed between the support layer 24 and the foaming layer 25. A first through hole 7 penetrates the mixed layer 22, a second through hole 8 penetrates the mixed layer 22, the intermediate layer 23, and the support layer 24, and a mixing pipe 9 penetrates the mixed layer 22, the intermediate layer 23, the support layer 24, and the foaming layer 25.

[0029] Reference Figure 1 , Figure 2 , sleeves 26 extending along the length direction are provided at the two side edges of the bearing surface 2. The sleeves 26 are used to insert the bearing rods 1. The edges of the inflatable layer 21, the mixed layer 22, the intermediate layer 23, the support layer 24, and the foaming layer 25 are integrally bonded to the sleeves 26 by hot pressing. This design enables the weight of the wounded to be evenly distributed to the inflatable layer 21, the mixed layer 22, the intermediate layer 23, the support layer 24, and the foaming layer 25 through the sleeves 26, thereby improving the support strength of the bearing surface 2.

[0030] Reference Figure 1 , Figure 2 , the inflatable cavity 3 is connected with an air injection nozzle 31. The air injection nozzle 31 is used to connect to a high-pressure gas cylinder to inject compressed air into the interior of the inflatable pipe 32.

[0031] Furthermore, in order to reduce the consumption of compressed gas, reference Figure 3 , the inflatable cavity 3 includes an inflatable pipe 32 extending along a preset path. The inflatable pipe 32 sequentially passes through each first through hole 7 and each second through hole 8. The air injection nozzle 31 is arranged at one end of the inflatable pipe 32. This design is used to guide the compressed air to quickly reach the target areas (the mixed cavity 4 and the support cavity 5) through the first through hole 7 and the second through hole 8.

[0032] Reference Figure 3 ,Figure 4 , Figure 5 , the mixing chamber 4 includes a storage pipeline 42 connecting the first through hole 7 and the mixing pipeline 9. The foaming agent 41 is pre-set inside the storage pipeline 42. After the inflation pipeline 32 injects compressed air into one end of the storage pipeline 42 through the first through hole 7, the foaming agent 41 moves towards the other end (mixing pipeline 9) of the storage pipeline 42. At the same time, the package of the foaming agent 41 ruptures, and different types of foaming agents 41 are mixed inside the mixing pipeline 9.

[0033] Preferably, the storage pipelines 42 are evenly distributed around the mixing pipeline 9. Each mixing pipeline 9 is connected to two or four storage pipelines 42. Among them, half of the storage pipelines 42 connected to each mixing pipeline 9 contain bagged isocyanate, and the other half of the storage pipelines 42 contain bagged polyol.

[0034] Reference Figure 6 and Figure 7 , the intermediate layer 23 is used to separate the mixing layer 22 and the support layer 24. The intermediate layer 23 and the support layer 24 form a support cavity 5 with a fixed shape. The support cavity 5 includes a number of ribs 51 that crisscross.

[0035] To prevent the first through hole 7 and the second through hole 8 from closing due to pre-winding and folding, the intermediate layer 23 further includes a cross-shaped reinforcing rib provided inside the first through hole 7 and the second through hole 8.

[0036] Furthermore, although the impact of compressed air can break the fragile packaging bag, however, a too-fragile packaging bag is more likely to break during folding and storage. Therefore, the packaging bag of the foaming agent 41 needs to be designed with a strength that is not easily damaged during folding and storage. However, this will cause the packaging bag of the foaming agent 41 to be difficult to break at the expected time. To solve this problem, reference Figure 3 , a bag breaker 91 is provided at the inlet edge of the mixing pipeline 9. The bag breaker 91 is a sharp sheet body. The bag breaker 91 is used to break the packaging bag of the foaming agent 41. After the foaming agent 41 moves to the inlet of the mixing pipeline 9, its packaging bag is broken by the bag breaker 91, thus avoiding the problem that the packaging bag of the foaming agent 41 fails to break, resulting in the foaming agent 41 not being mixed as expected.

[0037] Reference Figure 1 and Figure 8 , after the foaming cavity 6 is filled with the foaming agent 41, a human-shaped groove 27 that is concave inward is formed on the side of the foaming cavity 6 away from the support layer 24. This design is used to guide the foaming agent 41 to move more to the edge of the foaming cavity 6, thus avoiding the expanded foaming agent 41 causing the injured person to move on the flexible stretcher.

[0038] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be regarded as falling within the protection scope of the embodiments of the present invention.

Claims

1. A flexible stretcher based on inflation reinforcement and foam fixation, characterized in that: include: A bearing rod (1) and a bearing surface (2), wherein the bearing surface (2) is a sheet made of a flexible material, and the two side edges of the bearing surface (2) are respectively fixedly connected to a pair of parallel bearing rods (1); The bearing surface (2) comprises an air-filling cavity (3), a mixing cavity (4), a supporting cavity (5) and a foaming cavity (6) which are sequentially arranged along the thickness direction, and a first through hole (7) connecting the air-filling cavity (3) and the mixing cavity (4), a second through hole (8) connecting the air-filling cavity (3) and the supporting cavity (5), and a mixing pipe (9) connecting the mixing cavity (4) and the foaming cavity (6); The supporting cavity (5) is provided with ribs (51) that expand and take shape when compressed air is filled therein, and the interior of the mixing cavity (4) is pre-stored with independently packaged foaming agents (41), the packaging bag of the foaming agent (41) ruptures when impacted by compressed air, and the foaming agent (41) is mixed in the mixing pipe (9) and then enters the foaming cavity (6) for foaming.

2. A flexible stretcher based on inflation reinforcement and foam fixation according to claim 1, characterized in that: The bearing surface (2) comprises an air-filled layer (21), a mixing layer (22), an intermediate layer (23), a supporting layer (24) and a foaming layer (25) which are sequentially connected along a thickness direction; the air-filled cavity (3) is formed between the air-filled layer (21) and the mixing layer (22); the mixing cavity (4) is formed between the mixing layer (22) and the intermediate layer (23); the supporting cavity (5) is formed between the intermediate layer (23) and the supporting layer (24); the foaming cavity (6) is formed between the supporting layer (24) and the foaming layer (25); the first through hole (7) penetrates the mixing layer (22); the second through hole (8) penetrates the mixing layer (22), the intermediate layer (23) and the supporting layer (24); and the mixing pipe (9) penetrates the mixing layer (22), the intermediate layer (23), the supporting layer (24) and the foaming layer (25).

3. A flexible stretcher based on inflation reinforcement and foam fixation according to claim 2, characterized in that: Sleeves (26) extending in the length direction are provided at the edges of both sides of the bearing surface (2), and the sleeves (26) are used to be inserted into the bearing rod (1), and the edges of the inflation layer (21), the mixed layer (22), the intermediate layer (23), the support layer (24) and the foaming layer (25) are bonded together with the sleeves (26) by heat pressing.

4. A flexible stretcher based on inflation reinforcement and foam fixation according to claim 1, characterized in that: The ribs (51) are crisscrossed on the bearing surface (2).

5. A flexible stretcher based on inflation reinforcement and foam fixation according to claim 1, characterized in that: The inflation chamber (3) is connected to a gas injection nozzle (31), and the gas injection nozzle (31) is used to connect to a high-pressure gas cylinder.

6. A flexible stretcher based on inflation reinforcement and foam fixation according to claim 1, characterized in that: The inflation chamber (3) comprises an inflation pipe (32) extending along a preset path, wherein the inflation pipe (32) passes through each of the first through holes (7) and each of the second through holes (8) in sequence.

7. A flexible stretcher based on inflation reinforcement and foam fixation according to claim 1, characterized in that: The mixing chamber (4) comprises a material storage pipe (42) connecting the first through hole (7) and the mixing pipe (9), and the foaming agent (41) is pre-arranged inside the material storage pipe (42).

8. A flexible stretcher based on inflation reinforcement and foam fixation according to claim 7, characterized in that: The storage pipes (42) are evenly distributed around the mixing pipe (9), and each mixing pipe (9) is connected to two or four storage pipes (42), wherein half of the storage pipes (42) connected to each mixing pipe (9) are placed with bagged isocyanate, and the other half of the storage pipes (42) are placed with bagged polyol.

9. A flexible stretcher based on inflation reinforcement and foam fixation according to claim 8, characterized in that: A bag breaker (91) is provided at the inlet edge of the mixing pipe (9), and the packaging bags of the bagged isocyanate and the bagged polyol are broken when passing through the bag breaker (91).

10. A flexible stretcher based on inflation reinforcement and foam fixation according to claim 1, characterized in that: After the foaming cavity (6) is filled with the foaming agent (41), a side of the foaming cavity (6) away from the supporting cavity (5) forms an inwardly recessed human-shaped groove (27).

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