An extrusion and application device for amorphous hydrogel plastic composite dressing

Abstract

The utility model discloses an extrusion and application device for amorphous hydrogel plastic composite dressing, which can automatically shape and fix on the skin surface by mixing multiple materials, and can flexibly control the usage amount and is suitable for parts of different areas. The key points of its technical solution are that it includes a cylinder, a push rod, a piston and an extrusion head, the push rod and the piston are both movable in the cylinder, the cylinder includes three storage chambers and a mixing chamber, the three storage chambers are respectively placed with amorphous hydrogel, polyurethane foaming liquid and acrylic ester, the push rod moves to drive the objects in the three storage chambers to enter the mixing chamber at the same time, the extrusion head is arranged at the end of the cylinder away from the push rod, and the extrusion head and the mixing chamber are connected, after the mixed composite dressing is extruded, it is shaped into a special structure with a flexible rubber texture, and is stably pressed and fixed on the skin surface, avoiding a series of troubles and problems caused by the amorphous defects of the hydrogel.

Description

Technical Field

[0001] The utility model relates to the medical field, in particular to an extrusion and application device for an amorphous hydrogel plastic composite dressing. Background Art

[0002] As a wound dressing, amorphous hydrogel medical dressing has a very broad application prospect in the medical field. It is often used for some common body surface injuries, such as abrasions, scratches, bedsores, superficial burns, pressure sores and other skin injuries. It provides a comfortable and moist closed environment for the wound, promotes the healing of the wound surface, shortens the healing time, and brings great convenience to the care of wounds or skin injuries.

[0003] However, due to the amorphous physical properties of traditional hydrogels, they cannot be directly fixed on the patient. During use, they often need to be supported by medical patches (i.e., hydrogel patches). Only with the medical patches can the hydrogel (hydrogel) be fixed to the wound or skin injury site. In addition, the prefabricated shape of the hydrogel patch is specific and cannot be directly applied to wounds or skin injury sites of different areas.

[0004] Therefore, there is a need for an extrusion and application device for a shapeable composite dressing that can be directly fixed on the patient and is suitable for different parts of the body. Utility Model Content

[0005] The purpose of the utility model is to provide an extrusion and application device for an amorphous hydrogel plastic composite dressing, which can automatically shape and fix the extruded composite dressing on the skin surface by mixing multiple materials, and can flexibly control the usage amount and is suitable for parts of different areas.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A device for extruding and applying an amorphous hydrogel shapeable composite dressing comprises a barrel, a push rod, a piston and an extrusion head. The push rod and the piston are both movable in the barrel. The barrel comprises three storage chambers and a mixing chamber. The three storage chambers respectively contain amorphous hydrogel, polyurethane foaming liquid and acrylic ester. The push rod moves to drive the objects in the three storage chambers to enter the mixing chamber at the same time. The extrusion head is arranged at the end of the barrel away from the push rod, and the extrusion head is connected to the mixing chamber.

[0008] Compared with the prior art, the extrusion and application device of the amorphous hydrogel shapeable composite dressing using the above technical solution has the following beneficial effects:

[0009] 1. By using the extrusion and application device of the amorphous hydrogel plastic composite dressing of the utility model, the amorphous hydrogel (hydrogel), polyurethane foaming liquid and acrylate can be pushed into the mixing chamber at the same time by using the push rod, the piston and the storage chamber, so as to achieve the purpose of mixing the three materials, and utilize the shaping effect of acrylate and the foaming effect of polyurethane to make the mixed composite dressing form a special structure with a flexible rubber texture after extending from the extruder head, so that the composite dressing can be stably pressed and fixed on the skin surface, effectively avoiding a series of troubles and problems caused by the amorphous defects of the hydrogel.

[0010] Second, because medical staff can independently control the moving distance of the push rod, they can effectively control the extrusion amount of the composite dressing. While meeting the treatment needs, it can avoid the waste of a large amount of hydrogel when applied to small wounds.

[0011] Preferably, the barrel is provided with a butt joint near the end of the mixing chamber, the extruder head is threadedly connected to the butt joint, and the extruder head expands outward to form a trumpet-shaped application portion, and a strip-shaped application opening is provided on the side of the application portion away from the barrel. Since the extruder head is connected to the barrel through a threaded connection structure, the connection is stable and easy to operate directly. At the same time, the damaged or contaminated extruder head can be replaced according to the use requirements to ensure the hygiene of the treatment process; in addition, by using the cooperation of the outward-expanded application portion and the strip-shaped application opening, the composite dressing can be spread while extruding, so as to be suitable for large-area wounds or injured parts, and increase the application effect of medical staff.

[0012] Preferably, a guide tube is provided inside the extrusion head, and when the extrusion head is threadedly connected to the butt joint tube, the outer wall of the guide tube fits with the inner wall of the butt joint tube. When the composite dressing is transferred from the mixing chamber to the extrusion head, the built-in guide tube structure can be used to directly transfer the composite dressing from the guide tube to the inside of the extrusion head, thereby reducing the risk of part of the composite dressing being embedded in the threaded connection between the extrusion head and the butt joint tube, avoiding waste of the composite dressing, and avoiding the problem of the composite dressing leaking out and contaminating the outside world when the extrusion head is removed.

[0013] Preferably, the inner wall of the end of the guide tube facing the butt tube is an arc surface, and the arc surface is smoothly connected to the inner wall of the guide tube. The arc surface is used to increase the guiding effect of the composite dressing, so as to further reduce the probability of the composite dressing entering the threaded connection.

[0014] Preferably, a narrow-mouthed extrusion is also included, the narrow-mouthed extrusion is threadedly connected to the butt pipe, and a plurality of anti-skid lines are provided on the surface of the narrow-mouthed extrusion. By replacing the narrow-mouthed extrusion, it can be applied to small wounds or skin damage. Compared with the extrusion head with an outward-expanding application portion, the narrow-mouthed extrusion does not have a structure that is convenient for rotation, but the plurality of anti-skid lines on the surface make it easy for the hand to directly control the rotation of the narrow-mouthed extrusion, thereby making the narrow-mouthed extrusion also convenient for disassembly and assembly.

[0015] Preferably, a push block is provided at the end of the push rod away from the piston, a limit seat is provided at the end of the cylinder away from the extrusion head, and a buffer made of elastic material is provided on the side of the limit seat facing the push block. By utilizing the elasticity of the elastic material, while appropriately limiting the moving distance of the push block, the force of the push block is not affected to continue pushing the operation, and accordingly, the problem of excessive displacement of the piston in a short time and extrusion of the composite dressing can be avoided, thereby avoiding the waste of composite dressings and the problem of too much dressing on the patient.

[0016] Preferably, the limit seat is rotatably connected to the outer wall of the cylinder through a rotating shaft, and a damping layer is provided on the surface of the rotating shaft. The limit seat can be rotated so that the buffer is on the side facing away from the push block, which is suitable for the situation where there is less internal raw material or composite dressing, so that the dressing can be pushed continuously to avoid waste; and the deceleration and limiting effect of the damping layer is used to limit the position of the buffer after adjustment, so as to avoid the buffer moving arbitrarily during use and causing obstruction to the push block. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of an extrusion and application device for an amorphous hydrogel shapeable composite dressing of the utility model.

[0018] Figure 2 It is a schematic cross-sectional structure diagram of the connection state of the extrusion head and the butt pipe in the embodiment.

[0019] Figure 3 Schematic diagram of the structure of the narrow-mouth extrusion piece in the embodiment.

[0020] Figure 4 Schematic diagram of the internal structure of the narrow-mouth extrusion piece in the embodiment.

[0021] Figure 5 It is a schematic diagram of the structure of the limit seat in the flipped state in the embodiment.

[0022] Figure 6 Schematic diagram of the structure of the rotating shaft and the damping layer in the embodiment.

[0023] Figure numerals: 1, cylinder; 10, storage chamber; 11, mixing chamber; 2, push rod; 20, piston; 3, extrusion head; 30, application part; 31, application port; 32, guide tube; 33, arc surface; 4, butt joint tube; 5, narrow-mouth extrusion piece; 50, anti-slip pattern; 6, push block; 7, limit seat; 70, buffer piece; 8, rotating shaft; 80, damping layer. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings.

[0025] like Figures 1 to 6 The extrusion and application device for the amorphous hydrogel shapeable composite dressing shown comprises a barrel 1 , a push rod 2 , a piston 20 and an extrusion head 3 .

[0026] The push rod 2 and the piston 20 are both movable in the cylinder 1, and a push block 6 is provided at the end of the push rod 2 away from the piston 20 for easy finger pressing.

[0027] The cylinder 1 includes three storage chambers 10 and a mixing chamber 11. The three storage chambers 10 are pre-loaded with amorphous hydrogel, polyurethane foaming liquid and acrylic ester respectively. Considering the need to push the objects in the three storage chambers 10 at the same time, the push rods 2 and pistons 20 of this embodiment are each provided with three, and the three push rods 2 are simultaneously connected to the same push block 6. The push rods 2 move to drive the objects in the three storage chambers 10 to enter the mixing chamber 11 at the same time.

[0028] The extrusion head 3 is arranged at the end of the barrel 1 away from the push rod 2, and the extrusion head 3 is connected to the mixing chamber 11, and the mixture can be transferred from the mixing chamber 11 to the extrusion head 3. In order to facilitate the adjustment of the coverage of the composite dressing and increase the use effect, the extrusion head 3 is expanded to form a trumpet-shaped application part 30, and a strip-shaped application port 31 is provided on the side of the application part 30 away from the barrel 1, so that the composite dressing can be scraped while being extruded.

[0029] In order to achieve tight connection between the extrusion head 3 and the barrel 1 and facilitate disassembly and replacement, a butt joint 4 is provided at the end of the barrel 1 close to the mixing chamber 11, and the extrusion head 3 is threadedly connected to the butt joint 4.

[0030] In order to reduce the risk of part of the composite dressing entering the threaded connection between the extrusion head 3 and the butt tube 4, a guide tube 32 is provided in the extrusion head 3. When the extrusion head 3 is threadedly connected to the butt tube 4, the outer wall of the guide tube 32 fits with the inner wall of the butt tube 4.

[0031] like Figure 2 As shown, in order to achieve guided transfer of the composite dressing and further reduce the risk of the composite dressing entering the threaded connection, the inner wall of the end of the guide tube 32 facing the docking tube 4 is an arcuate surface 33, and the arcuate surface 33 is smoothly transitioned to the inner wall of the guide tube 32.

[0032] like Figure 3 and Figure 4 As shown, it also includes a narrow-mouth extrusion piece 5, which is threadedly connected to the docking tube 4, and a plurality of anti-slip grooves 50 are provided on the surface of the narrow-mouth extrusion piece 5; in this embodiment, considering the problems in the transfer process of the above-mentioned composite dressing, a guide tube 32 and a curved surface 33 are also provided in the narrow-mouth extrusion piece 5.

[0033] After the amorphous hydrogel, polyurethane foaming liquid and acrylate are mixed, and the mixed composite dressing is pushed out of the extrusion head 3 or the narrow-mouthed extrusion piece 5, the composite dressing is appropriately shaped and cured upon contact with the external environment under the influence of the chemical reaction of the polyurethane foaming liquid and the acrylate, forming a special structure with a flexible rubber texture, which is stably fixed on the treatment site.

[0034] During use, the extrusion head 3 can be connected to the butt joint 4 for a larger treatment area according to the treatment area of ​​the patient, while for a smaller treatment area, only the narrow-mouthed extrusion piece 5 needs to be connected.

[0035] In addition, in order to avoid excessive displacement of the push rod 2 due to excessive thrust or collision with foreign objects, Figure 1 and Figure 5 As shown, a limit seat 7 is provided at the end of the barrel 1 away from the extrusion head 3 , and a buffer member 70 made of elastic silicone or elastic rubber is provided on the side of the limit seat 7 facing the push block 6 .

[0036] The limiting seat 7 is rotatably connected to the outer wall of the cylinder 1 through the rotating shaft 8, and a damping layer 80 made of a thin layer of silicone is provided on the surface of the rotating shaft 8. If there are fewer objects in the storage chamber 10, the limiting seat 7 can be rotated so that the buffer 70 does not restrict the movement of the push rod 2, and the piston 20 of the push rod 2 can be fully inserted into the cylinder 1. The length of the push rod 2 and the shape of the piston 20 are not limited to the lengths shown in the figure. By adjusting the shape of the mixing chamber 11, the length of the push rod 2 and the shape of the piston 20, the piston 20 can be pushed to the connection between the mixing chamber 11 and the butt pipe 4 to fully utilize the composite dressing.

[0037] The above is a preferred embodiment of the present invention. A person skilled in the art may make several modifications and improvements without departing from the principle of the present invention, and these modifications and improvements shall also be regarded as within the protection scope of the present invention.

Claims

1. An extrusion and application device for an amorphous hydrogel shapeable composite dressing, characterized in that: The invention comprises a cylinder (1), a push rod (2) (2), a piston (20) and an extrusion head (3), wherein the push rod (2) (2) and the piston (20) are movable in the cylinder (1), wherein the cylinder (1) comprises three storage chambers (10) and a mixing chamber (11), wherein the three storage chambers (10) respectively contain amorphous hydrogel, polyurethane foaming liquid and acrylic ester, and the push rod (2) (2) moves to drive the objects in the three storage chambers (10) to enter the mixing chamber (11) at the same time, and the extrusion head (3) is arranged at the end of the cylinder (1) away from the push rod (2), and the extrusion head (3) and the mixing chamber (11) are connected.

2. The extrusion and application device for the amorphous hydrogel shapeable composite dressing according to claim 1, characterized in that: The barrel (1) is provided with a butt joint (4) at the end thereof close to the mixing chamber (11); the extrusion head (3) is threadedly connected to the butt joint (4); the extrusion head (3) is expanded outward to form a trumpet-shaped application portion (30); and a strip-shaped application opening (31) is provided on a side of the application portion (30) away from the barrel (1).

3. The extrusion and application device for the amorphous hydrogel shapeable composite dressing according to claim 2, characterized in that: A guide tube (32) is provided inside the extrusion head (3); when the extrusion head (3) is threadedly connected to the butt joint tube (4), the outer wall of the guide tube (32) fits with the inner wall of the butt joint tube (4).

4. The extrusion and application device for the amorphous hydrogel shapeable composite dressing according to claim 3, characterized in that: The inner wall of the end of the guide tube (32) facing the butt-joint tube (4) is an arc-shaped surface (33), and the arc-shaped surface (33) is smoothly transitionally connected to the inner wall of the guide tube (32).

5. The extrusion and application device for the amorphous hydrogel shapeable composite dressing according to claim 2, characterized in that: It also includes a narrow-mouth extrusion piece (5), which is threadedly connected to the butt-joint pipe (4), and a plurality of anti-slip grooves (50) are provided on the surface of the narrow-mouth extrusion piece (5).

6. The extrusion and application device for the amorphous hydrogel shapeable composite dressing according to claim 1, characterized in that: A push block (6) is provided at the end of the push rod (2) away from the piston (20), a limit seat (7) is provided at the end of the cylinder (1) away from the extrusion head (3), and a buffer member (70) made of elastic material is provided on the side of the limit seat (7) facing the push block (6).

7. The extrusion and application device for the amorphous hydrogel shapeable composite dressing according to claim 6, characterized in that: The limiting seat (7) is rotatably connected to the outer wall of the cylinder (1) via a rotating shaft (8), and a damping layer (80) is provided on the surface of the rotating shaft (8).

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