A flexible stretcher based on pneumatic stiffening and foam fixation

Abstract

The present application relates to the field of stretcher, in particular to a flexible stretcher based on inflation reinforcement and foaming fixation, the flexible stretcher comprises a bearing rod and a bearing surface, wherein the bearing surface comprises, in sequence along the thickness direction, an inflation cavity, a mixing cavity, a supporting cavity and a foaming cavity, and a first through hole connecting the inflation cavity and the mixing cavity, a second through hole connecting the inflation cavity and the supporting cavity, and a mixing pipeline connecting the mixing cavity and the foaming cavity; wherein the supporting cavity is provided with ribs that are expanded and shaped when filled with compressed air, the mixing cavity has an independently packaged foaming agent stored therein in advance, and the packaging bag of the foaming agent is broken when impacted by the compressed air. The embodiment of the present application uses inflation expansion technology to increase the bottom cloth of the flexible stretcher, uses foaming fixation technology to constrain the head, trunk and limbs of the wounded, thereby semi-wrapping and fixing the wounded in situ, so as to reduce movement, improve stability, and the stretcher can be quickly disassembled after reaching the medical institution, facilitating subsequent treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of stretchers, in particular to a flexible stretcher based on inflatable reinforcement and foaming fixation. BACKGROUND

[0002] Simple stretchers are often used when transferring the wounded in complex environments, which include lifting rods and cloth bags. The cloth bag is a piece made of flexible material, and the two side edges are fixedly connected with a pair of parallel lifting rods. The common lifting rod can be made of rigid materials such as wood, metal or composite materials. The common cloth bag can be made of flexible and high-strength materials such as canvas, nylon or other woven materials. The common connection method of the lifting rod and the cloth bag includes sewing, bonding, riveting or other mechanical connection methods.

[0003] Since the cloth bag of the simple stretcher is soft and easy to deform, it is difficult to fix the wounded well, and secondary injury is prone to occur. In particular, in the cervical spine, thoracic spine and lumbar spine area, it is more necessary to avoid any unnecessary movement and vibration.

[0004] Therefore, it has become an urgent problem to develop a safe, stable, convenient and efficient wounded transfer device. SUMMARY

[0005] The purpose of the present application is to provide a flexible stretcher based on inflatable reinforcement and foaming fixation to solve the problem that the cloth bag of the simple stretcher is soft and easy to deform, it is difficult to fix the wounded well, and secondary injury is prone to occur.

[0006] To solve the above technical problems, the present application specifically provides the following technical scheme:

[0007] A flexible stretcher based on inflatable reinforcement and foaming fixation, comprising: a bearing rod and a bearing surface, the bearing surface is a piece made of flexible material, and the two side edges of the bearing surface are fixedly connected with a pair of parallel bearing rods;

[0008] Among them, the bearing surface includes inflatable cavity, mixing cavity, support cavity and foaming cavity arranged in sequence along the thickness direction, and first through hole connecting the inflatable cavity and the mixing cavity, second through hole connecting the inflatable cavity and the support cavity, and mixing pipeline connecting the mixing cavity and the foaming cavity;

[0009] Among them, the support cavity has ribs that expand and shape when filled with compressed air, the mixing cavity has independently packaged foaming agent stored inside in advance, the packaging bag of the foaming agent breaks when impacted by compressed air, and the foaming agent enters the foaming cavity after mixing in the mixing pipeline to foam.

[0010] Further, the bearing surface comprises an inflation layer, a mixing layer, an intermediate layer, a support layer and a foaming layer connected in sequence along the thickness direction, the inflation cavity is formed between the inflation layer and the mixing layer, the mixing cavity is formed between the mixing layer and the intermediate layer, the support cavity is formed between the intermediate layer and the support layer, the 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 pipeline penetrates the mixing layer, the intermediate layer, the support layer and the foaming layer.

[0011] Further, the two side edges of the bearing surface are provided with sleeves extending along the length direction, the sleeves are used for inserting the bearing rod, and the edges of the inflation layer, the mixing layer, the intermediate layer, the support layer and the foaming layer are integrally bonded with the sleeves through hot pressing.

[0012] Further, the ribs are staggered on the bearing surface.

[0013] Further, the inflation cavity is connected with a gas injection nozzle, and the gas injection nozzle is used for connecting a high-pressure gas cylinder.

[0014] Further, the inflation cavity comprises an inflation pipeline extending along a preset path, and the inflation pipeline sequentially passes through each first through hole and each second through hole.

[0015] Further, the mixing cavity comprises a storage pipeline connecting the first through hole and the mixing pipeline, and the foaming agent is previously arranged inside the storage pipeline.

[0016] Further, the storage pipelines are uniformly distributed around the mixing pipeline, each mixing pipeline is connected with two or four storage pipelines, and half of the storage pipelines connected with each mixing pipeline are arranged with bagged isocyanate, and the other half of the storage pipelines are arranged with bagged polyol.

[0017] Further, the inlet edge of the mixing pipeline is provided with a bag breaker, and the packaging bags of the bagged isocyanate and the bagged polyol are broken when passing through the bag breaker.

[0018] Further, after the foaming cavity is filled with the foaming agent, the side of the foaming cavity away from the support cavity forms a human-shaped concave groove inwardly recessed.

[0019] Compared with the prior art, the application has the following beneficial effects:

[0020] The embodiment of the present application uses the inflation expansion technology to increase the bottom cloth of the flexible stretcher, uses the foaming fixing technology to constrain the head, trunk and limbs of the wounded, thereby semi-wrapping and fixing the wounded in situ, reducing movement, improving stability, and the stretcher can be quickly disassembled after reaching the medical institution, facilitating subsequent treatment. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only exemplary, and other drawings can be obtained according to the provided drawings without creative labor for those skilled in the art.

[0022] Figure 1 is a perspective view of the embodiment of the present application;

[0023] Figure 2 is a front view of the embodiment of the present application;

[0024] Figure 3 is a sectional view of the A-A direction of Figure 2

[0025] Figure 4 is an assembly view of the bearing surface of the embodiment of the present application;

[0026] Figure 5 is an assembly view of the inflation cavity of the embodiment of the present application;

[0027] Figure 6 is an assembly view of the mixing cavity of the embodiment of the present application;

[0028] Figure 7 is an assembly view of the support cavity of the embodiment of the present application;

[0029] Figure 8 is an assembly view of the foaming cavity of the embodiment of the present application;

[0030] The numbers in the drawings respectively represent as follows:

[0031] 1-bear ing rod;

[0032] 2-bear ing surface; 21-inflation layer; 22-mixing layer; 23-intermediate layer; 24-support layer; 25-foaming layer; 26-sleeve; 27-human-shaped groove;

[0033] 3-inflation cavity; 31-gas injection nozzle; 32-inflation pipeline;

[0034] 4-mixing cavity; 41-foaming agent; 42-accumulator pipeline;

[0035] 5-support cavity; 51-rib;​

[0036] 6-foam cavity

[0037] 7-first through hole; 8-second through hole; 9-mixing duct; 91-bag breaker DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0039] The present application provides a flexible stretcher based on inflatable reinforcement and foam fixation, which aims to use inflatable expansion technology to increase the bottom cloth of the flexible stretcher, use foam fixation technology to constrain the head, trunk and limbs of the wounded, so as to semi-wrap and fix the wounded in situ, reduce movement, improve stability, and quickly disassemble the stretcher after reaching the medical institution, facilitate subsequent treatment, hereinafter referred to as flexible stretcher.

[0040] Reference Figure 1 , Figure 2 , Figure 3 The flexible stretcher includes a bearing rod 1 and a bearing surface 2, the bearing surface 2 is a sheet made of flexible material, and the two side edges of the bearing surface 2 are respectively fixedly connected with a pair of parallel bearing rods 1, wherein the bearing surface 2 includes, in sequence along the thickness direction: an inflatable cavity 3, a mixing cavity 4, a support cavity 5 and a foam cavity 6, and a first through hole 7 connecting the inflatable cavity 3 and the mixing cavity 4, a second through hole 8 connecting the inflatable cavity 3 and the support cavity 5, and a mixing duct 9 connecting the mixing cavity 4 and the foam cavity 6, wherein the support cavity 5 has rib 51 that expands and shapes when filled with gas, the mixing cavity 4 has independently packaged foam agent 41 stored inside in advance, and the packaging bag of the foam agent 41 is broken when impacted by compressed air.

[0041] The use process of the flexible stretcher is briefly as follows:

[0042] Step one, place the bearing surface 2 in a rolled or folded state under the wounded.

[0043] Step two, connect the compressed gas cylinder to the inflation cavity 3, and the compressed gas enters the mixing cavity 4 through the inflation cavity 3 and the first through-hole 7, then breaks the package of the foaming agent 41, pushes the foaming agent 41 (such as isocyanate and polyol) into the mixing pipeline 9 to mix with each other, and then enters the foaming cavity 6 through the mixing pipeline 9 to foam, so as to quickly expand and wrap the wounded to form a fixed structure; at the same time, the compressed gas enters the support cavity 5 through the inflation cavity 3 and the second through-hole 8, so that the support cavity 5 is inflated and shaped, thereby increasing the strength of the bearing surface 2.

[0044] Step three, connect the bearing rod 1 to both sides of the bearing surface 2 for lifting.

[0045] Step four, after reaching the medical institution, release the gas in the support cavity 5, cut the foaming layer 25, and complete the rapid disassembly and handover.

[0046] In addition, the two long edges of the bearing surface 2 are connected with a plurality of fixed sockets arranged along the length direction of the bearing surface 2, which are used to connect the restraint belts across the two sides of the bearing surface 2, so as to bind the wounded on the bearing surface 2. The fixed sockets are not shown in the figure, and the common connection mode of the fixed sockets and the restraint belts includes Velcro, plug buckle and belt structure.

[0047] The two short edges of the bearing surface 2 are connected with front and back straps, which are not shown in the figure. The lifting personnel can hang the flexible stretcher on the neck through the front and back straps to assist in transporting the wounded in complex terrain (such as mountainous area).

[0048] Reference Figure 4 The specific structure of the bearing surface 2 is as follows: the bearing surface 2 includes five layers of sheets connected in sequence along the thickness direction, which are the inflation layer 21, the mixing layer 22, the intermediate layer 23, the support layer 24 and the foaming layer 25. The inflation cavity 3 is formed between the inflation layer 21 and the mixing layer 22, the mixing cavity 4 is formed between the mixing layer 22 and the intermediate layer 23, the support cavity 5 is formed between the intermediate layer 23 and the support layer 24, the foaming cavity 6 is formed between the support 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 support layer 24, and the mixing pipeline 9 penetrates the mixing layer 22, the intermediate layer 23, the support layer 24 and the foaming layer 25.

[0049] Reference Figure 1 , Figure 2 The two side edges of the bearing surface 2 are provided with sleeves 26 extending along the length direction, which are used to be inserted into the bearing rod 1. The edges of the inflation layer 21, the mixing layer 22, the intermediate layer 23, the support layer 24 and the foaming layer 25 are integrally bonded with the sleeves 26 by hot pressing. This design makes the weight of the wounded evenly distributed to the inflation layer 21, the mixing layer 22, the intermediate layer 23, the support layer 24 and the foaming layer 25 through the sleeves 26, thereby improving the supporting strength of the bearing surface 2.

[0050] Reference Figure 1 , Figure 2 The inflation cavity 3 is connected with a gas injection nozzle 31, which is used to connect a high-pressure gas cylinder to inject compressed air into the inside of the inflation pipeline 32.

[0051] Further, in order to reduce the amount of compressed gas, reference Figure 3 The inflation cavity 3 includes an inflation pipeline 32 extending along a predetermined path, the inflation pipeline 32 sequentially passes through each first through hole 7 and each second through hole 8, and the gas injection nozzle 31 is arranged at one end of the inflation pipeline 32, which is used to guide the compressed air to quickly pass through the first through hole 7 and the second through hole 8 to reach the target area (the mixing cavity 4 and the support cavity 5).

[0052] Reference Figure 3 , Figure 4 , Figure 5 The mixing cavity 4 includes a storage pipeline 42 connecting the first through hole 7 and the mixing pipeline 9, the blowing agent 41 is pre-arranged in the inside of 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 blowing agent 41 moves towards the other end of the storage pipeline 42 (the mixing pipeline 9), at the same time, the package of the blowing agent 41 is broken, and different kinds of blowing agent 41 complete mixing in the mixing pipeline 9.

[0053] Preferably, the storage pipeline 42 is evenly distributed around the mixing pipeline 9, and each mixing pipeline 9 is connected with two or four storage pipelines 42, wherein half of the storage pipelines 42 connected with each mixing pipeline 9 are placed with bagged isocyanate, and the other half of the storage pipelines 42 are placed with bagged polyol.

[0054] Reference Figure 6 and Figure 7 The intermediate layer 23 is used to separate the mixing layer 22 and the support layer 24, and the intermediate layer 23 and the support layer 24 form a fixed-shape support cavity 5, which includes a plurality of rib strips 51 arranged in a crisscross manner.

[0055] In order to avoid the first through hole 7 and the second through hole 8 being closed due to pre-rolling and folding, the intermediate layer 23 further includes a cross-shaped reinforcing rib arranged in the inside of the first through hole 7 and the second through hole 8.

[0056] Further, although the impact of compressed air can cause the fragile packaging bag to break, the packaging bag that is too fragile is more likely to break when folded for storage, therefore, it is necessary to design the packaging bag of the blowing agent 41 to be strong enough not to break easily when folded for storage, but this will cause the packaging bag of the blowing agent 41 to be difficult to break at the expected time, in order to solve this problem, reference Figure 3, the inlet edge of the mixing pipe 9 is provided with a bag breaker 91, which is a sharp piece, and the bag breaker 91 is used to break the packaging bag of the foaming agent 41, and after the foaming agent 41 moves to the inlet of the mixing pipe 9, the packaging bag of the foaming agent 41 is broken by the bag breaker 91, thereby avoiding the problem that the packaging bag of the foaming agent 41 fails to break, resulting in that the foaming agent 41 fails to achieve mixing as expected.

[0057] With reference to Figure 1 and Figure 8 , after the foaming cavity 6 is filled with the foaming agent 41, the side of the foaming cavity 6 away from the support layer 24 is formed with a human-shaped recess 27 which is inwardly recessed, and this design is used to guide the foaming agent 41 to move more to the edge of the foaming cavity 6, thereby avoiding that the expanded foaming agent 41 causes the wounded person to move the position on the flexible stretcher.

[0058] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application, and the protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements are also regarded as falling within the protection scope of the embodiments of the present application.

Claims

1. A flexible stretcher based on air-inflated reinforcement and foam fixation, characterized in that, include: The bearing rod (1) and the bearing surface (2) are a sheet made of flexible material. The two sides of the bearing surface (2) are fixedly connected to a pair of parallel bearing rods (1). The bearing surface (2) includes an air-filled cavity (3), a mixing cavity (4), a supporting cavity (5), and a foaming cavity (6) arranged sequentially along the thickness direction, as well as a first through hole (7) connecting the air-filled cavity (3) and the mixing cavity (4), a second through hole (8) connecting the air-filled 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 equipped with ribs (51) that expand and solidify when filled with compressed air, and the mixing cavity (4) is pre-stored with individually packaged foaming agent (41). The bearing surface (2) includes an inflatable layer (21), a mixing layer (22), an intermediate layer (23), a support layer (24), and a foaming layer (25) connected sequentially along the thickness direction. An inflatable cavity (3) is formed between the inflatable layer (21) and the mixing layer (22). A mixing cavity (4) is formed between the mixing layer (22) and the intermediate layer (23). A support cavity (5) is formed between the intermediate layer (23) and the support layer (24). A foaming cavity (6) is formed between the support layer (24) and the foaming layer (25). A first through hole (7) penetrates the mixing layer (22). A second through hole (8) penetrates the mixing layer (22), the intermediate layer (23), and the support layer (24). A mixing pipe (9) penetrates the mixing layer (22), the intermediate layer (23), the support layer (24), and the foaming layer (25). The inflation chamber (3) is connected to an air injection nozzle (31), which is used to connect to a high-pressure gas cylinder. The inflation chamber (3) includes an inflation pipe (32) extending along a preset path. The inflation pipe (32) passes through each of the first through holes (7) and each of the second through holes (8) in sequence. The mixing chamber (4) includes a storage pipe (42) connecting the first through hole (7) and the mixing pipe (9), and the foaming agent (41) is pre-placed inside the storage pipe (42); The storage pipes (42) are evenly distributed around the mixing pipes (9), and each mixing pipe (9) connects to two or four storage pipes (42). Half of the storage pipes (42) connected to each mixing pipe (9) contain bagged isocyanate, and the other half of the storage pipes (42) contain bagged polyol. A bag breaker (91) is provided at the inlet edge of the mixing pipe (9), and the bags of the bagged isocyanate and the bagged polyol are destroyed when they pass through the bag breaker (91). The air filling chamber (3) is used so that after receiving compressed air, a portion of the air enters the support chamber (5) through the second through hole (8) to expand and solidify the ribs (51) inside, and another portion of the air enters the mixing chamber (4) through the first through hole (7) to impact the foaming agent (41) inside. The packaging bag of the foaming agent (41) breaks when it is impacted by the compressed air. After being mixed in the mixing pipe (9), the foaming agent (41) enters the foaming chamber (6) to foam and fill and fix.

2. The flexible stretcher based on air-inflated reinforcement and foam fixation according to claim 1, characterized in that, The two sides of the bearing surface (2) are provided with sleeves (26) extending along the length direction. The sleeves (26) are used to insert the bearing rod (1). The edges of the air layer (21), the mixing layer (22), the intermediate layer (23), the support layer (24) and the foaming layer (25) are all bonded to the sleeves (26) by hot pressing.

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

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

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