Liquid injection device of skin expander

Abstract

The utility model discloses a liquid injection device of a skin expander. The liquid injection device comprises a liquid injection disc, a pressing injection machine, a liquid injection pipe and a sterile injector. An injection hole is formed in the lower side surface of the liquid injection disc, and a liquid inlet hole is formed in the side wall; the pressing injection machine comprises an outer shell, an injection needle, a spring, a push rod, a locking piece and a pressing seat; a circulating hole is formed in the side wall of the outer shell, and an injection port over against the injection hole is formed in the bottom of the outer shell; the locking piece is fixed to the inner wall of the outer shell, limiting grooves are distributed in the lower side face of the locking piece, and guide rails are distributed on the inner wall of the locking piece. The injection needle is fixed on the push rod; sliding claws are distributed on the upper end face of the push rod; sawteeth are distributed on the lower side face of the pressing base. Sliding blocks corresponding to the guide rails are distributed on the outer side wall of the pressing seat; the spring is mounted outside the injection needle; one end of the liquid injection pipe is communicated and connected with the liquid inlet hole, and the other end of the liquid injection pipe is matched with an injection port of the sterile injector. The operation difficulty of liquid extraction and injection in the skin expansion operation can be reduced, and the occurrence of needle head bending and patient pain caused by needle head bending is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field especially relates to a skin expander liquid injection device. BACKGROUND

[0002] Skin expansion is a conventional treatment scheme of plastic surgery. The scheme includes: placing a skin soft tissue expander under the healthy skin near the lesion area, periodically injecting liquid into the expander to gradually increase its volume, and applying pressure to the skin covering it. Further stimulate the proliferation and division of tissue and epidermal cells, while expanding the intercellular space, ultimately achieving the expansion of skin area. The expander currently used in clinical practice mainly includes three parts: expansion capsule, injection seat and water injection pipe. The operation process is as follows: first, bury the expansion capsule and injection seat in the human skin; then, use a sterile syringe to extract an appropriate amount of 0.9% sodium chloride injection, and replace the needle with a 4 or 5 needle; the needle of the sterile syringe is inserted into the injection valve of the injection seat at a perpendicular angle, and the injection liquid is slowly injected. The problem with the above scheme is that the liquid injection process requires high operation of medical staff. If the sterile syringe needle does not penetrate the skin at a perpendicular angle to reach the injection valve on the injection seat, the needle will be bent and may cause pain to the patient. Therefore, how to develop a new structure of skin expander liquid injection device to overcome the above problems in the prior art is the direction of further research for those skilled in the art. SUMMARY

[0003] The utility model aims at providing a kind of skin expander liquid injection device, which can reduce the operation difficulty of liquid injection in skin expansion, reduce the bending of needle and the occurrence of patient pain.

[0004] The utility model discloses a kind of skin expander liquid injection device, it includes:

[0005] Liquid injection disc, the lower side of the disc body of the liquid injection disc is consistent with the upper end surface profile of injection seat, and the lower side of the disc body of the liquid injection disc is provided with injection hole;The position of the injection hole in the lower side of the disc body of the liquid injection disc is configured to match the position of injection valve on the injection seat;Liquid inlet hole is equipped on the disc body side wall of the liquid injection disc;

[0006] The pressing injection machine comprises an outer shell, an injection needle, a spring, a push rod, a locking piece and a pressing seat; the outer shell is fixed on the upper side of the disc body of the liquid injection disc, the side wall of the outer shell is provided with a flow-through hole, and the bottom of the outer shell is provided with an injection port opposite to the injection hole, and a limiting inner edge is arranged in the injection port; the locking piece is fixed on the inner wall of the outer shell, the lower side of the locking piece is provided with a plurality of deep limiting grooves and shallow limiting grooves arranged in sequence and at intervals, and a guide rail is further arranged on the inner wall of the locking piece; the needle tail of the injection needle is fixed on the lower end surface of the push rod, and the needle head is opposite to the injection port; a plurality of sliding claws matching the deep limiting grooves and the shallow limiting grooves are arranged on the upper end outer side surface of the push rod; the lower side of the pressing seat is provided with uniform sawteeth, and the upper side of the pressing seat protrudes from the top of the outer shell; the outer side wall of the pressing seat is provided with a sliding block corresponding to the guide rail; and the spring is arranged outside the needle body of the injection needle, the upper end of the spring abuts against, and the lower end of the spring abuts against the limiting inner edge.

[0007] The liquid injection pipe is in communication with the liquid inlet hole.

[0008] The injection port of the sterile syringe is matched with the other end of the liquid injection pipe.

[0009] By adopting the technical scheme, in the process of skin expansion, the medical staff first touches the upper side profile of the injection seat buried in the human skin with fingers, and then places the lower side of the disc body of the liquid disc opposite to the upper end surface of the injection seat, so that the injection hole is naturally aligned with the injection valve on the injection seat. Then the medical staff injects liquid into the liquid injection pipe through the sterile syringe, the injected injection liquid flows into the liquid injection disc through the liquid injection pipe, and then enters the outer shell through the flow-through hole. In the working process, the pressing seat is pressed, the sawteeth drive the push rod to rotate downward, so that the needle head moves to the injection valve on the injection seat, and the spring is compressed. Under the action of the spring rebound force, the sliding claws slide into the shallow limiting grooves on the locking piece, the pressing seat is released, the push rod continues to move upward, and the sliding claws and the shallow limiting grooves are engaged. At this time, the position of the needle body is fixed, so that the needle head remains in the state of entering the injection valve, and the injection liquid is injected into the injection valve along the needle head of the injection needle. After the injection is completed, the pressing seat is pressed again, the push rod is driven to disengage from the locking piece, and under the action of the spring rebound force, the sliding claws slide into the deep limiting grooves on the locking piece. The pressing seat is released, so that the push rod continues to move upward, until the sliding claws and the deep limiting grooves are engaged. At this time, the needle head is pulled out of the injection valve and retracted into the outer shell.

[0010] Preferably, the other end of the liquid injection pipe is provided with a threaded joint, and the threaded joint is provided with an internal thread; the sterile syringe comprises a needle tube, and one end of the needle tube is provided with a threaded injection port, and the threaded injection port is provided with an external thread matched with the internal thread; the other end of the needle tube is connected with a piston rod which extends into the needle tube.

[0011] By adopting the technical scheme, firstly, the injection liquid is placed in the container, the injection liquid is drawn into the liquid injection pipe by operating the piston rod, and then the injection liquid in the needle tube is injected into the threaded joint of the liquid injection pipe through the cooperation of the internal thread and the external thread.

[0012] Preferably, the middle section of the pipe body of the liquid injection pipe is provided with an air filter.

[0013] By adopting the technical scheme, the air filter is used to block and filter the air and particles in the injection liquid flowing through the liquid injection pipe, so that the purity and sterility of the injection liquid are ensured.

[0014] More preferably, the air filter comprises a filter shell, and the filter shell is provided with filter material.

[0015] More preferably, the filter material is any one of cellulose particles, polyethylene particles and polyester particles.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] Firstly, the utility model can reduce the operation difficulty of liquid extraction and injection in skin expansion, ensure the perpendicularity of needle insertion angle, and reduce the bending of the needle and the pain of the patient.

[0018] Secondly, in the liquid injection process, the injection needle always extends into the injection seat, so that the needle does not need to be frequently replaced, and the non-professional patient family members can use it after simple training.

[0019] Thirdly, the utility model can block and filter the air and particles in the injection liquid flowing through the liquid injection pipe, so that the purity and sterility of the injection liquid are ensured.

[0020] Finally, the utility model has the advantages of simple structure, convenient operation process, easy preparation and use. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is a structural schematic view of example 1.

[0022] Fig. 2 It is a schematic view of the internal structure of the liquid injection disc, and the sliding claw is in the state of meshing connection with the shallow limit slot, and the liquid inlet hole is omitted in the figure.

[0023] Fig. 3 The figure is an exploded view of the push rod, the locking piece and the pressing seat. In the figure, the guide rail on the inner wall of the locking piece is not shown due to the angle of view; in order to express clearly, the spring is in the compressed state to expose the needle.

[0024] In the figure, the component names corresponding to each reference numeral are as follows:

[0025] 100, liquid injection disc; 200, pressing injection machine; 300, liquid injection pipe; 400, sterile syringe; 210, outer shell; 220, injection needle; 230, spring; 240, push rod; 250, locking piece; 260, pressing seat; 110, injection hole; 120, liquid inlet hole; 211, flow-through hole; 212, injection port; 2121, limiting inner edge; 241, sliding claw; 251, deep limiting groove; 252, shallow limiting groove; 261, sawtooth; 262, sliding block; 310, threaded joint; 410, threaded injection port; 420, piston rod; 510, filter shell; 520, filter material. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described below through specific concrete examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. The present application can also be implemented or applied through other different specific embodiments, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application.

[0027] Example 1, please refer to Figs. 1-3 :

[0028] A skin expander liquid injection device, comprising: a liquid injection disc 100, a pressing injection machine 200, a liquid injection pipe 300, and a sterile syringe 400.

[0029] The lower side of the disc body of the liquid injection disc 100 is consistent with the upper end surface of the injection seat, and the lower side of the disc body of the liquid injection disc 100 is provided with an injection hole 110; the position of the injection hole 110 on the lower side of the disc body of the liquid injection disc 100 is configured to match the position of the injection valve on the injection seat; the disc body side wall of the liquid injection disc 100 is provided with a liquid inlet hole 120;

[0030] The pressing injection machine 200 comprises an outer housing 210, an injection needle 220, a spring 230, a push rod 240, a locking member 250 and a pressing seat 260; the outer housing 210 is fixed to the upper side of the disc body of the liquid injection disc 100, a through hole 211 is arranged on the side wall of the outer housing 210, and an injection port 212 opposite to the injection hole 110 is arranged on the bottom of the outer housing 210; a limiting inner edge 2121 is arranged in the injection port 212; the locking member 250 is fixed to the inner wall of the outer housing 210, a plurality of deep limiting grooves 251 and shallow limiting grooves 252 are arranged on the lower side of the locking member 250 in sequence and at intervals, and a guide rail is further arranged on the inner wall of the locking member 250; the needle tail of the injection needle 220 is fixed to the lower end surface of the push rod 240, and the needle head is opposite to the injection port 212; a plurality of sliding claws 241 matching the deep limiting grooves 251 and the shallow limiting grooves 252 in shape are arranged on the upper end outer side surface of the push rod 240; a plurality of uniform sawteeth 261 are arranged on the lower side of the pressing seat 260, and the upper side of the pressing seat 260 protrudes from the top of the outer housing 210; a plurality of sliding blocks 262 corresponding to the guide rail are arranged on the outer side wall of the pressing seat 260; the spring 230 is installed outside the needle body of the injection needle 220, the upper end of the spring 230 abuts against, and the lower end of the spring 230 abuts against the limiting inner edge 2121;

[0031] One end of the liquid injection pipe 300 is in communication connection with the liquid inlet hole 120; the other end of the liquid injection pipe 300 is provided with a threaded joint 310, and the threaded joint 310 is provided with an internal thread;

[0032] The sterile injection device 400 comprises an injection needle pipe, one end of the injection needle pipe is provided with a threaded injection port 410, the threaded injection port 410 is provided with an external thread matching the internal thread, and the other end of the needle pipe is connected with a piston rod 420 extending into the injection needle pipe.

[0033] An air filter is installed in the middle segment of the pipe body of the liquid injection pipe 300. The air filter comprises a filter housing 510, and a filter material 520 is installed in the filter housing 510. The filter material 520 adopts any one of cellulose particles, polyethylene particles and polyester particles.

[0034] In practice, the working process is as follows:

[0035] During the process of skin expansion, the medical staff first feels the outline of the upper side of the injection seat embedded in the human skin with fingers, and then places the lower side of the disc body of the liquid disc against the upper end face of the injection seat, at this time the injection hole 110 is naturally aligned with the injection valve on the injection seat. Then the medical staff first places the injection liquid in the container, draws the injection liquid into the injection tube 300 through the operation of the piston rod 420, and then injects the injection liquid in the injection needle 220 tube into the threaded joint 310 of the injection tube 300 through the cooperation of the internal and external threads. The injection liquid flows into the injection disc 100 through the injection tube 300, and enters the shell body 210 through the flow hole 211. During work: press the pressing seat 260, the sawtooth 261 drives the push rod 240 to rotate downward, so that the needle moves to pierce the skin into the injection valve on the injection seat, and the spring 230 is compressed, the push rod 240 slides into the shallow limiting groove 252 on the locking piece 250 under the elastic force of the spring 230, at this time the pressing seat 260 is loosened to make the push rod 240 continue to move upward, until the slide claw 241 and the shallow limiting groove 252 are engaged, at this time the needle position is fixed to keep the needle in the state of entering the injection valve, at this time the injection liquid is injected into the injection valve along the needle of the injection needle 220. After injection is completed, press the pressing seat 260 again, drive the push rod 240 to disengage from the locking piece 250, and the slide claw 241 slides into the deep limiting groove 251 on the locking piece 250 under the elastic force of the spring 230, loosen the pressing seat 260 to make the push rod 240 continue to move upward, until the slide claw 241 and the deep limiting groove 251 are engaged. At this time, the needle is pulled out of the injection valve and retracted into the shell body 210. Thus, the operation difficulty of the injection of the liquid in the skin expansion is reduced, the perpendicularity of the needle insertion angle is ensured, and the bending of the needle and the pain of the patient are reduced.

[0036] The embodiments of the utility model are described in detail above in combination with various drawings, but the utility model is not limited to the above-mentioned embodiments. Even if various changes are made to the utility model, if the changes belong to the scope of the utility model claims and equivalent technologies, they still fall within the protection scope of the utility model.

Claims

1. A skin expander infusion device, comprising: The device comprises: a liquid injection disc, the lower side of the disc body of which is consistent with the upper end surface of the injection seat, and the lower side of the disc body is provided with an injection hole; the position of the injection hole on the lower side of the disc body is configured to match the position of the injection valve on the injection seat; the side wall of the disc body is provided with a liquid inlet hole; a pressing injection machine, which comprises a shell, an injection needle, a spring, a push rod, a locking piece and a pressing seat; the shell is fixed to the upper side of the disc body of the liquid injection disc, the side wall of the shell is provided with a flow-through hole, the bottom of the shell is provided with an injection port opposite to the injection hole, and the injection port is provided with a limiting inner edge; the locking piece is fixed to the inner wall of the shell, the lower side of the locking piece is distributed with a plurality of deep limiting grooves and shallow limiting grooves arranged in sequence and at intervals, and the inner wall of the locking piece is further distributed with a guide rail; the needle tail of the injection needle is fixed to the lower end surface of the push rod, and the needle head is opposite to the injection port; the upper end outer side of the push rod is distributed with a plurality of sliding claws matching the deep limiting grooves and the shallow limiting grooves in shape; the lower side of the pressing seat is distributed with uniform sawteeth, the upper side of the pressing seat extends out of the top of the shell; the outer side wall of the pressing seat is distributed with a sliding block corresponding to the guide rail; the spring is installed outside the needle body of the injection needle, the upper end of the spring abuts, and the lower end of the spring abuts on the limiting inner edge; a liquid injection pipe, one end of which is in communication with the liquid inlet hole; a sterile syringe, the injection port of which matches the other end of the liquid injection pipe.

2. The skin expander liquid injection device according to claim 1, wherein the other end of the liquid injection pipe is provided with a threaded joint, and the threaded joint is provided with an internal thread; the sterile syringe comprises a needle tube, one end of the needle tube is provided with a threaded injection port, the threaded injection port is provided with an external thread matching the internal thread, and the other end of the needle tube is connected with a piston rod extending into the needle tube.

3. The skin expander liquid injection device according to claim 2, wherein an air filter is installed in the middle segment of the pipe body of the liquid injection pipe.

4. The skin expander liquid injection device according to claim 3, wherein the air filter comprises a filter shell, and the filter shell is installed with filter material.

5. The skin expander liquid injection device according to claim 4, wherein the filter material adopts any one of cellulose particles, polyethylene particles and polyester particles.

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