Universal type ejection needle assisting device for muscle or subcutaneous injection

Abstract

The utility model relates to a universal type ejection needle assisting device for muscle or subcutaneous injection, which comprises a shell, a base matched with the shell and used for containing a puncture assembly, a clamping device located in the shell and capable of moving up and down relative to the shell and an ejection device located between the shell and the clamping device, and the clamping device is used for clamping the puncture assembly. The structure of the puncture needle is changed, after the puncture needle and the injection soft needle are ejected and pricked into the body of a patient, the puncture needle can be taken out by the ejection clamping device, then the puncture needle is placed into the base again, and waste treatment is carried out along with the base. Meanwhile, the clamping disc capable of clamping the infusion tube and the infusion needle head is arranged and matched with the soft needle base of the injection soft needle, so that the insulin pump injection needle is suitable for injection of an insulin pump and an insulin pen, and the universality is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of drug injection tools, and in particular relates to a universal ejection needle aid for intramuscular or subcutaneous injection. Background Art

[0002] At present, there are five main ways of drug injection in medicine, namely intradermal injection, subcutaneous injection, intramuscular injection, intravenous drip and arterial drip. Among them, intradermal injection, intravenous drip and arterial drip have high requirements for needle insertion and can only be completed by professional medical staff. For subcutaneous injection and intramuscular injection, the requirements for needle insertion are relatively low. They can be completed by medical staff as needed, or they can be assisted by the patient himself or his family. For example, for patients with diabetes, diabetic patients need to control blood sugar levels by daily insulin injections. Insulin injections are usually completed by the patient himself or with the assistance of his family. Since the patient himself or his family does not have professional medical knowledge and corresponding psychological qualities, they often feel reluctant to insert the needle or the needle force is small, resulting in the injection needle not being able to penetrate or the needle not being inserted deep enough, affecting the absorption and efficacy of insulin. At the same time, it also has a certain impact on the patient's psychology, increasing the patient's fear of needles, and then needle aversion, resistance to insulin injection, and the fluke mentality causes the patient to miss the needle, which makes the insulin injection unable to be continuous, and ultimately leads to the worsening of the patient's condition.

[0003] To this end, technicians have developed needle aids. However, the existing needle aids are either for insulin pens or insulin pumps, and have poor versatility. For example, the Chinese utility model patent with application number "2023103430443" and the name "Needle aid for subcutaneous and intramuscular injection" pierces the puncture needle and the injection soft needle into the patient's body by ejection, and then manually removes the puncture needle, and the injection soft needle and the needle holder are pasted and retained on the patient's body, and the patient is injected with drugs through the retained needle holder and injection soft needle. This injection method is only suitable for patients to use insulin pens for injection. For insulin pump injection, since the insulin pump needs to deliver drugs through an infusion tube with a needle, and the needle holder disclosed in the Chinese utility model patent cannot fix the infusion hose and the needle, it is not suitable for insulin pumps.

[0004] The Chinese utility model patent with application number "2023231064150" and name "Button-type automatic injection aid" automatically inserts the injection needle of the infusion tube into the patient's body by ejection. The patient injects the drug through the infusion tube and needle. This injection method is a special injection aid for insulin pumps and is not suitable for insulin pens.

[0005] In addition, for the Chinese utility model patent with application number "2023103430443" and name "Needle puncture aid for subcutaneous and intramuscular injection", the needle puncture aid needs to be manually removed and scrapped when in use. For patients or family members who do not have professional knowledge, manual removal and scrapping of the puncture needle is easy to cause injuries, posing a risk of cross infection. Utility Model Content

[0006] To sum up, in order to overcome the shortcomings of the existing technical problems, the utility model provides a universal ejection needle aid for intramuscular or subcutaneous injection, which changes the structure of the puncture needle. After the puncture needle and the injection soft needle are ejected into the patient's body, the puncture needle will be taken out by the ejection clamping device, and then put back into the base and discarded together with the base, without the need for manual needle removal. At the same time, a clamping plate that can clamp the infusion tube and the infusion needle is provided, which cooperates with the soft needle seat of the injection soft needle, so that the utility model can be used for both insulin pump injection and insulin pen, and has strong versatility.

[0007] In order to solve the above technical problems, the technical solution of the utility model is implemented as follows:

[0008] A universal ejection needle aid for intramuscular or subcutaneous injection, comprising a shell, a base that cooperates with the shell to hold a puncture assembly, a clamping device located in the shell and capable of moving up and down relative to the shell, and an ejection device located between the shell and the clamping device, wherein the clamping device is used to clamp the puncture assembly, and the ejection device is used to lock the shell and the clamping device and eject the puncture assembly clamped by the clamping device, wherein: the puncture assembly comprises a soft needle seat, an injection soft needle, an upper adhesive sheet, a puncture needle seat and a puncture needle, the soft needle seat is fixed with an injection soft needle, and the injection soft needle is fixedly arranged in the soft needle seat. The injectable drug enters the patient's muscle tissue or subcutaneous tissue through the injection needle. The bottom surface of the soft needle seat is provided with an upper adhesive sheet, which is a double-sided adhesive sheet. The top surface of the upper adhesive sheet is adhered and fixed to the bottom surface of the soft needle seat. The bottom surface of the upper adhesive sheet is provided with anti-sticking paper. When the injection needle is inserted into the patient's body, the upper adhesive sheet is used to adhere and fix the soft needle seat and the patient's skin. The puncture needle is fixedly arranged in the puncture needle seat, and the puncture needle passes through the inner hole of the injection needle. The puncture needle is used to pierce the patient's skin and pull the injection needle into the patient's muscle tissue or subcutaneous tissue. An annular groove is provided in the puncture needle seat, and an inner convex block protruding inward is provided on the outer wall of the annular groove. An insert piece that is inserted and matched with the annular groove of the puncture needle seat is provided in the clamping device, and an outer convex block protruding outward is provided on the outer wall of the insert piece. When the ejection device ejects the puncture assembly clamped by the clamping device, the outer convex block and the inner convex block cooperate with each other to prevent the puncture needle seat from escaping from the clamping device.

[0009] Furthermore, the clamping device comprises a guide sleeve, two clamping pieces, a rotating shaft and a clamping spring, wherein the two clamping pieces are arranged symmetrically, the upper ends of the two clamping pieces are hingedly connected by a rotating shaft, the middle parts of the two clamping pieces are connected by a clamping spring, and the lower parts of the two clamping pieces are both provided with inserts extending downwards.

[0010] The two clamping pieces, the rotating shaft and the clamping spring form a clamping sleeve with a hollow structure. The lower part of the clamping sleeve with a hollow structure is provided with a clamping cavity for clamping the soft needle seat. The insert piece is located in the clamping cavity.

[0011] The guide sleeve is installed in the shell, the guide sleeve is a hollow structure, the clamping sleeve is installed in the inner cavity of the guide sleeve, the side wall of the guide sleeve is provided with a guide slot arranged along the height direction of the guide sleeve, and the inner wall of the shell is provided with a slider that cooperates with the guide slot. The guide slot and the slider cooperate with each other and play a guiding role when the clamping device moves up and down relative to the shell.

[0012] The outer wall of the clamping piece is provided with an expansion groove and a contraction groove arranged from top to bottom along the height direction thereof, the depth of the expansion groove is greater than the depth of the contraction groove, the slider on the inner wall of the shell passes through the guide slide groove and contacts the expansion groove or the contraction groove, when the clamping device moves upward relative to the shell, the slider contacts the expansion groove first and then the contraction groove, the slider squeezes the two clamping pieces from the outside to the inside, the two clamping pieces contract inward to clamp the puncture assembly, when the clamping device moves downward relative to the shell, the slider contacts the contraction groove first and then the expansion groove, under the action of the clamping spring, the two clamping pieces expand from the inside to the outside, and the clamped puncture assembly is released.

[0013] Furthermore, the lower end of the clamping piece is provided with an inwardly arranged protrusion for preventing the puncture assembly from falling off after the clamping device clamps the puncture assembly.

[0014] Furthermore, the puncture needle seat comprises an outer sleeve, a middle sleeve and an inner cylinder which are integrally structured and coaxially arranged in sequence from the outside to the inside. The lower end of the outer sleeve is fixedly connected to the middle part of the middle sleeve, an annular groove is formed between the inner wall of the outer sleeve and the outer wall of the middle sleeve, the inner protrusion is located at the upper end of the inner wall of the outer sleeve, the lower end of the inner cylinder is fixedly connected to the middle part of the middle sleeve, the puncture needle is fixed in the inner cylinder, and the inner cavity of the middle sleeve below the inner cylinder is used for inserting the soft needle seat.

[0015] Furthermore, the soft needle seat includes an outer ring, a middle ring and a needle seat that are integrally structured and coaxially arranged in sequence from the outside to the inside. The outer ring, the middle ring and the lower ends of the needle seat are fixedly connected. The needle seat is inserted into the inner cavity of the middle cylinder from the lower end of the middle cylinder. The needle seat is provided with an inner hole for inserting an injection soft needle. The injection soft needle is pressed into the inner hole through a silicone sealing block. The inner hole includes a silicone sealing hole, a funnel hole and a fine needle hole that are arranged and connected in sequence from top to bottom. The silicone sealing hole is used to install the silicone sealing block. The funnel hole and the fine needle hole are used to insert the injection soft needle. The height of the needle seat is higher than the height of the outer ring and higher than the height of the middle ring. The upper end of the inner wall of the outer ring is provided with inner teeth protruding inward.

[0016] Furthermore, the soft needle seat is provided with a clamping disk that is engaged with the soft needle seat, and the clamping disk is used to clamp an infusion tube and an infusion needle. The clamping disk comprises a body, an elastic ring, a handle, an outer clamping block and a needle handle of an integrated structure. The body is provided with two symmetrically arranged elastic rings, one end of the elastic ring is connected to the body, and the other end is suspended. The elastic ring is provided with a handle, and the elastic ring can be contracted toward the body by operating the handle to squeeze the elastic ring inward. The outer clamping block is provided at the lower outer side of the elastic ring, and the outer clamping block is clamped under the inner teeth of the soft needle seat to realize the clamping connection between the clamping disk and the soft needle seat. The lower end of the body is provided with a cavity for plug-in connection with the needle seat of the soft needle seat, and a needle handle is provided on one side of the body. A clamping groove for clamping the infusion needle and the infusion tube is provided in the body and the needle handle, and the clamping groove opens downward. The infusion needle is clamped in the center of the body, and the infusion needle is connected to the infusion tube.

[0017] Furthermore, the soft needle seat is provided with a sealing cover which is snap-fitted with the soft needle seat, and the sealing cover is used to close the injection port at the upper end of the soft needle seat through the sealing cover after the drug injection is completed. The sealing cover includes a cover plate of an integral structure and a connecting sleeve located at the lower end of the cover plate, and the connecting sleeve is provided with an inner hole for inserting the needle seat of the soft needle seat, and the inner hole is a tapered hole, and the needle seat of the soft needle seat is tapered.

[0018] The beneficial effects of the utility model are:

[0019] 1. The utility model changes the structure of the puncture needle. After the puncture needle and the injection needle are ejected and inserted into the patient's body, the puncture needle will be taken out by the ejection clamping device, and then put back into the base and discarded together with the base. There is no need to manually remove the needle. At the same time, a clamping plate that can clamp the infusion tube and the infusion needle is provided, which cooperates with the soft needle seat of the injection needle, so that the utility model can be used for both insulin pump injection and insulin pen, and has strong versatility.

[0020] 2. The upper end of the inner wall of the outer sleeve of the puncture needle holder of the utility model is provided with an inner convex block, and the inserting piece in the clamping piece of the clamping device of the utility model is provided with an outer convex block. When the clamping device clamps the puncture assembly, the two clamping pieces of the clamping device shrink from the outside to the inside, and the inserting piece shrinks inward with the clamping piece, so that the outer convex block avoids the inner convex block, so that the clamping device smoothly clamps the puncture assembly. When the patient's body is pierced with a needle, the ejection device ejects the clamping device and the puncture assembly, and the two clamping pieces of the clamping device expand from the inside to the outside. The outer protrusion avoids the inner protrusion, so that the puncture needle and the puncture needle seat are disengaged from the clamping device. After the acupuncture is completed, the puncture needle seat and the puncture needle are disengaged from the patient's body together with the clamping device, and then are re-inverted in the base. With the cooperation of the base, the two clamping pieces of the clamping device are re-contracted from the outside to the inside, and the outer protrusion avoids the inner protrusion, so that the puncture needle and the puncture needle seat are disengaged from the clamping device, so that there is no need to manually remove the puncture needle after the acupuncture, which is convenient for operation and avoids the risk of cross infection.

[0021] 3. The clamping disc of the utility model holds the infusion tube and the infusion needle. After the clamping disc is snap-fitted and connected to the soft needle holder, the infusion needle clamped by the clamping disc pierces through the silicone sealing block of the soft needle holder into the injection soft needle, thereby realizing the connection between the infusion tube and the infusion needle and the injection soft needle. After the infusion tube is connected to the insulin pump, insulin can be injected into the patient through the insulin pump. When the patient uses an insulin pen for injection, the needle of the insulin pen can be directly pierced through the silicone sealing block of the soft needle holder into the injection soft needle, and insulin can be injected directly through the insulin pen. After the insulin injection is completed, the soft needle holder can be closed by the sealing cover.

[0022] 4. The puncture assembly of the utility model punctures the patient's skin through the puncture needle and retains the soft needle tube of the injection needle in the patient's body. When the patient injects medicine, the injection is injected through the injection needle. The retained injection needle can be reused many times. After each injection, only the cover cap needs to be installed on the soft needle seat, which can effectively reduce the number of injections for the patient and reduce the patient's pain. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 It is a schematic diagram of a half-section structure of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the housing of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the ejection switch of the utility model;

[0027] Figure 5 It is a structural schematic diagram of the base of the utility model;

[0028] Figure 6 It is a three-dimensional structural schematic diagram of the clamping sleeve of the utility model;

[0029] Figure 7 It is a schematic cross-sectional structure diagram of the clamping sleeve of the utility model;

[0030] Figure 8 It is a structural schematic diagram of the guide sleeve of the utility model;

[0031] Fig. 9 It is a three-dimensional structural schematic diagram of the puncture needle and the puncture needle seat of the utility model;

[0032] Fig.10 For this utility model Fig. 9 Schematic diagram of the half-section structure;

[0033] Fig.11 It is a three-dimensional structural schematic diagram of the soft injection needle and the soft needle seat of the utility model;

[0034] Fig.12 For the utility model Fig.11 Schematic diagram of the half-section structure;

[0035] Fig.13 It is a three-dimensional structural schematic diagram of the clamping disk of the utility model;

[0036] Fig.14 It is a schematic cross-sectional view of the assembled clamping disc and soft needle seat of the utility model;

[0037] Fig.15 It is a schematic diagram of a half-section structure after the cover and the soft needle seat of the utility model are assembled;

[0038] Fig.16 It is a schematic diagram of the structure of the puncture assembly of the utility model after it pops out from the clamping device. DETAILED DESCRIPTION

[0039] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0040] like Figure 1 , Figure 2 As shown, a universal ejection aid for intramuscular or subcutaneous injection includes a shell 1, a base 2, a lower adhesive sheet 3, a puncture assembly, a clamping device and an ejection device. The shell 1 is a cylindrical structure with upper and lower ends opened, and an end cap is clamped and connected to the upper end opening. The shell 1 is provided with a clamping device, and an ejection device is provided between the shell 1 and the clamping device. The lower end of the shell 1 cooperates with the base 2, as shown in FIG. Figure 3As shown, an inwardly arranged support ring 4 is provided on the inner wall of the shell 1, a short sliding sleeve 5 is fixedly provided inside the inner ring of the support ring 4, the clamping device is installed in the short sliding sleeve 5, and a slider 23 that cooperates with the guide sliding groove 21 on the guide sleeve 11 of the clamping device is provided on the inner wall of the short sliding sleeve 5. The top of the support ring 4 is provided with an ejection switch of the ejection device, and the ejection device includes an ejection spring 6 and an ejection switch. The ejection spring 6 is located between the shell 1 and the clamping device, and the ejection switch is located at the upper part of the shell 1 and the clamping device. When the clamping device moves upward to clamp the puncture assembly, the clamping device compresses the ejection spring 6, and the ejection switch locks the clamping device and the shell 1. After operating the ejection switch to separate the clamping device from the shell 1, the clamping device quickly moves downward under the action of the ejection spring 6 and releases the puncture assembly it clamps, as shown in FIG. Figure 4 As shown, the ejection switch includes a push handle 7, a button 8 and a reset spring 9. The button 8 is arranged on the housing 1, and the inner side of the button 8 is engaged with one end of the push handle 7. The push handle 7 is located in the housing 1 and the middle part of the push handle 7 is hinged to the support ring 4 through a hinge shaft. A hook is arranged at the other end of the push handle 7, and a reset spring 9 is arranged between the hook end of the push handle 7 and the inner wall of the housing 1. A groove 36 that cooperates with the hook end of the push handle 7 is arranged on the cylinder 19 of the guide sleeve 11 of the clamping device, and the hook end of the push handle 7 cooperates with the groove 36 on the cylinder 19 of the guide sleeve 11 to achieve locking of the guide sleeve 11 and the housing 1. An ejection spring 6 is arranged between the lower end of the support ring 4 and the flange ring sheet of the guide sleeve 11. The ejection spring 6 is squeezed when the guide sleeve 11 moves upward. After pressing the button 8, the guide sleeve 11 is ejected under the action of the ejection spring 6.

[0041] like Figure 5 As shown, the base 2 is used to hold and support the puncture component, and a lower adhesive sheet 3 is pasted and fixed on the base 2. The lower adhesive sheet 3 is a medical double-sided film with a through hole in the center. The bottom surface of the lower adhesive sheet 3 is pasted and fixed to the base 2, and the top surface of the lower adhesive sheet 3 is used to uncover the anti-sticking liner on the bottom surface of the upper adhesive sheet 29 of the puncture component. The base 2 is a frame structure with an open upper end, and an upward protrusion is provided in the middle of the inner bottom plate of the base 2. A groove for inserting the shell 1 is formed between the outer wall of the protrusion and the inner wall of the base 2. The center of the protrusion is provided with an inner hole for accommodating the puncture needle 31 and the injection soft needle 28. The lower adhesive sheet 3 is pasted and fixed to the top surface of the protrusion, and a PE tube 10 for convenient insertion of the supporting puncture needle 31 is provided in the inner hole.

[0042] like Figure 6 , Figure 7 and Figure 8As shown, the clamping device is used to clamp the puncture assembly. The clamping device can move up and down relative to the shell 1. When the clamping device moves upward relative to the shell 1, it contracts from the outside to the inside, thereby clamping the puncture assembly. When the clamping device moves downward relative to the shell 1, it expands from the inside to the outside, thereby releasing the puncture assembly clamped by it. The clamping device includes a guide sleeve 11, two clamping pieces 12, a rotating shaft 13 and a clamping spring 14. The two clamping pieces 12 are arranged symmetrically on the left and right. The upper ends of the two clamping pieces 12 are hingedly connected by the rotating shaft 13, and the middle parts of the two clamping pieces 12 are connected by the clamping spring. 14 is connected, the lower part of the two clamping pieces 12 is provided with a plug 15 extending downward, the outer wall of the plug 15 is provided with an outer convex block 18 protruding outward, the two clamping pieces 12, the rotating shaft 13 and the clamping spring 14 form a clamping sleeve 16 with a hollow structure, the lower part of the clamping sleeve 16 with a hollow structure is provided with a clamping cavity 17 for clamping the soft needle seat 27, the plug 15 is located in the clamping cavity 17, the guide sleeve 11 is installed in the shell 1, the guide sleeve 11 is a hollow structure, and the clamping sleeve 16 is installed in the inner cavity of the guide sleeve 11. The guide sleeve 11 includes a flange ring, a cylinder 19 and an upper cover 20. The flange ring and the cylinder 19 are an integral structure. The cylinder 19 is a cylindrical structure. The flange ring is arranged on the outer circumference of the lower end of the cylinder 19. The clamping sleeve 16 is installed in the cylinder 19. The cylinder 19 is provided with a guide groove 21 arranged along the height direction of the cylinder 19. The upper end of the cylinder 19 is clamped and connected with the upper cover 20. The upper end inner wall of the cylinder 19 is provided with a support groove 22 for supporting the rotating shaft 13. The upper cover 20 is provided with a downwardly arranged pressure block 35 for pressing the rotating shaft 13. The pressure block 35 cooperates with the support groove 22 to realize the press-fitting of the rotating shaft 13. The inner wall of the housing 1 is provided with a slider 23 that cooperates with the guide groove 21. The guide groove 21 and the slider 23 They cooperate with each other and play a guiding role when the clamping device moves up and down relative to the shell 1. The outer wall of the clamping piece 12 is provided with an expansion groove 24 and a contraction groove 25 arranged from top to bottom along its height direction. The depth of the expansion groove 24 is greater than the depth of the contraction groove 25. The slider 23 on the inner wall of the shell 1 passes through the guide slide groove 21 and contacts the expansion groove 24 or the contraction groove 25. When the clamping device moves upward relative to the shell 1, the slider 23 first contacts the expansion groove 24 and then contacts the contraction groove 25. The slider 23 squeezes the two clamping pieces 12 from the outside to the inside, and the two clamping pieces 12 contract inward to clamp the puncture assembly. When the clamping device moves downward relative to the shell 1, the slider 23 first contacts the contraction groove 25 and then contacts the expansion groove 24. Under the action of the clamping spring 14, the two clamping pieces 12 expand from the inside to the outside to release the clamped puncture assembly. The lower end of the clamping piece 12 is provided with an inwardly arranged protrusion 26 for preventing the puncture assembly from falling off after the clamping device clamps the puncture assembly.

[0043] like Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, the puncture assembly includes a soft needle seat 27, an injection soft needle 28, an upper adhesive sheet 29, a puncture needle seat 30 and a puncture needle 31. The soft needle seat 27 is fixedly provided with an injection soft needle 28, and the injection drug enters the patient's muscle tissue or subcutaneous tissue through the injection soft needle 28. The bottom surface of the soft needle seat 27 is provided with an upper adhesive sheet 29, and the upper adhesive sheet 29 is a double-sided adhesive sheet. The top surface of the upper adhesive sheet 29 is adhered and fixed to the bottom surface of the soft needle seat 27. The bottom surface of the upper adhesive sheet 29 is provided with an anti-sticking paper. When the injection soft needle 28 is inserted into the patient's body, the upper adhesive sheet 29 is used to adhere and fix the soft needle seat 27 to the patient's skin. The puncture needle 31 is fixedly provided in the puncture needle seat 30, and the puncture needle 31 passes through the inner hole of the injection soft needle 28. The puncture needle 31 is used to pierce the patient's skin and pull the injection soft needle 28 into the patient's muscle tissue or subcutaneous tissue. The puncture needle seat 30 includes The outer sleeve 301, the middle sleeve 302 and the inner cylinder 303 are integrally structured and coaxially arranged from outside to inside. The lower end of the outer sleeve 301 is fixedly connected to the middle of the middle sleeve 302. An annular groove 304 is formed between the inner wall of the outer sleeve 301 and the outer wall of the middle sleeve 302. An inner convex block 305 protruding inward is provided on the outer wall of the annular groove 304. The inner convex block 305 is connected to the outer wall of the inserting piece 15 of the clamping piece 12 of the clamping device. The outer protrusions 18 are arranged to cooperate with each other. When the ejection device ejects the puncture assembly clamped by the clamping device, the outer protrusions 18 cooperate with the inner protrusions 305 to prevent the puncture needle seat 30 from escaping from the clamping device. The lower end of the inner cylinder 303 of the puncture needle seat 30 is fixedly connected to the middle part of the middle cylinder 302, and the puncture needle 31 is fixed in the inner cylinder 303. The inner cavity of the middle cylinder 302 below the inner cylinder 303 is used to insert the soft needle seat 27.

[0044] The soft needle seat 27 includes an outer ring 271, a middle ring 272 and a needle seat 273 which are integrally structured and coaxially arranged from outside to inside. The lower ends of the outer ring 271, the middle ring 272 and the needle seat 273 are fixedly connected. The needle seat 273 is inserted into the inner cavity of the middle cylinder 302 from the lower end of the middle cylinder 302. The needle seat 273 is provided with an inner hole for inserting the injection soft needle 28. The injection soft needle 28 is pressed into the inner hole through a silicone sealing block 274. The inner hole includes a silicone sealing hole, a funnel hole and a fine needle hole which are arranged and connected from top to bottom. The silicone sealing hole is used to install the silicone sealing block 274. The funnel hole and the fine needle hole are used to insert the injection soft needle 28. The height of the needle seat 273 is higher than that of the outer ring 271 and higher than that of the middle ring 272. The upper end of the inner wall of the outer ring 271 is provided with inner teeth 275 protruding inward. The injection soft needle 28 includes a metal guide and a soft needle tube. The metal guide includes a funnel portion and a vertical tube portion of an integrated structure. The soft needle tube is fixedly connected to the vertical tube portion. The inner cavity of the funnel portion, the inner cavity of the vertical tube portion and the inner cavity of the soft needle tube are connected to form an injection channel.

[0045] like Fig.13 , Fig.14 As shown, the soft needle seat 27 is provided with a clamping plate 32 that is clamped with the soft needle seat 27. The clamping plate 32 is used to clamp the infusion tube and the infusion needle. The clamping plate 32 includes a body 321, an elastic ring 322, a handle 323, an outer clamping block 324 and a needle handle 325 of an integrated structure. The body 321 is provided with two symmetrically arranged elastic rings 322, one end of the elastic ring 322 is connected to the body 321, and the other end is suspended. The elastic ring 322 is provided with a handle 323. The handle 323 is operated to squeeze the elastic ring 322 inwardly, so that the elastic ring 322 can shrink toward the body 321. An outer clamping block 324 is provided at the lower outer side of the elastic ring 322, and the outer clamping block 324 is clamped under the inner teeth 275 of the soft needle seat 27 to realize the clamping connection between the clamping plate 32 and the soft needle seat 27. The lower end of the body 321 is provided with a cavity for plugging and connecting with the needle seat 273 of the soft needle seat 27, and a needle handle 325 is provided on one side of the body 321. A clamping groove 326 for clamping an infusion needle and an infusion tube is provided in the body 321 and the needle handle 325, and the clamping groove 326 opens downward. The infusion needle is clamped in the center of the body 321, and the infusion needle is connected to the infusion tube.

[0046] like Fig.15As shown, the soft needle seat 27 is provided with a sealing cover 33 which is snap-fitted with the soft needle seat 27. The sealing cover 33 is used to close the injection port at the upper end of the soft needle seat 27 through the sealing cover 33 after the drug injection is completed. The sealing cover 33 includes a cover plate of an integral structure and a connecting sleeve 34 located at the lower end of the cover plate. The connecting sleeve 34 is provided with an inner hole for passing the needle seat 273 of the soft needle seat 27. The inner hole is a tapered hole, and the needle seat 273 of the soft needle seat 27 is tapered.

[0047] like Fig.16 As shown, when in use, first stick the double-sided tape used as the lower adhesive sheet 3 on the upper end of the protrusion of the base 2, and peel off the anti-sticking liner on the top surface of the lower adhesive sheet 3, stick the soft needle seat 27 with the injection soft needle 28 on the lower adhesive sheet 3, and then puncture the puncture needle 31 through the silicone sealing block 274 in the soft needle seat 27 and enter the injection soft needle 28.

[0048] In the initial state, the slider 23 in the shell 1 contacts the expansion slot on the outer wall of the clamping sleeve 16, and the clamping cavity 17 at the lower end of the clamping sleeve 16 remains in an expanded state. The patient or his family holds the shell 1, and then turns the shell 1 upside down in the base 2. Since the clamping cavity 17 is in an expanded state, the puncture assembly pasted on the base 2 is inserted into the clamping cavity 17. Then, the patient or his family presses down the shell 1. Under the action of the downward pressure, the shell 1 moves downward, and the ejection spring 6 is compressed. Under the blocking action of the puncture assembly, the clamping device in the shell 1 remains stationary, and the slider 23 in the shell 1 comes out of the expansion slot and contacts and cooperates with the contraction slot 25. In this process, the slider 23 squeezes the two clamping pieces 12 of the clamping sleeve 16, and the The two clamping pieces 12 are hingedly connected at the upper ends. Under the squeezing action of the slider 23, the two clamping pieces 12 shrink from the outside to the inside, thereby clamping the puncture needle seat 30 and the soft needle seat 27 of the puncture assembly. When the hook end of the push handle 7 of the ejection switch in the shell 1 is inserted into the groove at the upper end of the guide sleeve 11, the shell 1 is locked with the clamping device. The inwardly arranged protrusions 26 at the lower ends of the two clamping pieces 12 of the clamping sleeve 16 can effectively prevent the puncture assembly from falling off from the clamping cavity 17. At this time, the patient or his family members operate the shell 1 to separate it from the base 2. Under the action of the lower adhesive sheet 3, the anti-sticking liner on the bottom surface of the upper adhesive sheet 29 is left on the lower adhesive sheet 3, thereby exposing the adhesive layer on the bottom surface of the upper adhesive sheet 29.

[0049] The patient or his / her family moves the housing 1 clamping the puncture assembly, and when it moves to the injection site corresponding to the opening at the lower end of the housing 1, the button 8 is pressed, and the hook end of the ejection switch is disengaged from the slot of the guide sleeve 11. Under the action of the ejection spring 6, the guide sleeve 11 and the clamping sleeve 16 move quickly, and the slider 23 of the housing 1 moves quickly from the compression slot to the expansion slot 24. The two clamping pieces 12 expand from the inside to the outside, thereby expanding the clamping cavity 17 of the clamping sleeve 16, and the puncture assembly is ejected from the clamping cavity 17 and inserted into the patient's body. The upper adhesive sheet 29 is adhered to the patient's skin, thereby adhering the soft needle seat 27 to the patient's skin. When the two clamping pieces 12 expand from the inside to the outside, the inner protrusion 305 on the puncture needle seat 30 is blocked by the outer protrusion 18 on the outer wall of the inserting piece 15 of the clamping piece 12, and the puncture needle seat 30 will not be clamped. The puncture needle seat 30 and the puncture needle 31 are slowly pulled out from the injection soft needle 28, and then the shell 1 is turned upside down in the base 2 again, and the shell 1 is pressed down. The shell 1 moves downward, the ejection spring 6 is compressed, and the two clamping pieces 12 of the clamping device are retracted, so that the outer protrusion 18 on the insert piece 15 of the clamping piece 12 is retracted inward, and the outer protrusion 18 is disengaged from the inner protrusion 305 of the puncture needle seat 30, so that the puncture needle seat 30 and the puncture needle 31 are disengaged from the clamping cavity 17, and the shell 1 is removed. The puncture needle seat 30 and the puncture needle 31 remain in the base 2. The PE tube in the inner hole of the base 2 can prevent the puncture needle 31 from falling off, and the base 2 and the puncture needle seat 30 and the puncture needle 31 therein can be discarded together. Then, the cover 33 is installed on the soft needle seat 27, and the puncture of the injection soft needle 28 is completed.

[0050] This embodiment takes the injection of insulin by a diabetic patient as an example. When the patient uses an insulin pen to inject insulin, the cover 33 is removed from the soft needle seat 27, and the silicone sealing block 274 in the soft needle seat 27 is disinfected. Then, the front end needle of the insulin pen is pierced through the silicone sealing block 274 and enters the injection soft needle 28, and insulin is slowly pushed into the injection soft needle 28. After the injection is completed, the cover 33 is reinstalled on the soft needle seat 27.

[0051] When the patient uses the insulin pump to inject insulin, the infusion tube and the infusion needle are clamped in the clamping groove 326 of the clamping plate 32, the cover 33 is removed from the soft needle seat 27, and the silicone sealing block 274 in the soft needle seat 27 is disinfected. Then the clamping plate 32 is clamped on the soft needle seat 27, and the infusion needle pierces the silicone sealing block 274 and enters the injection soft needle 28. The infusion tube is connected to the insulin pump, the insulin pump is started, and insulin is slowly pushed into the injection soft needle 28 through the infusion tube and the infusion needle. After the injection is completed, the clamping plate 32 is removed, the infusion tube and the infusion needle are discarded, and the cover 33 is re-installed on the soft needle seat 27.

[0052] It should be noted that the above-described embodiments are illustrative rather than limiting of the technical solution of the utility model. Equivalent substitutions made by ordinary technicians in the relevant technical field or other modifications made according to the prior art should be included in the scope of rights required by the utility model as long as they do not exceed the idea and scope of the technical solution of the utility model.

Claims

1. A universal ejection aid for intramuscular or subcutaneous injection, comprising a housing (1), a base (2) that cooperates with the housing (1) and is used to hold a puncture assembly, a clamping device located in the housing (1) and capable of moving up and down relative to the housing (1), and an ejection device located between the housing (1) and the clamping device, wherein the clamping device is used to clamp the puncture assembly, and the ejection device is used to lock the housing (1) and the clamping device and eject the puncture assembly clamped by the clamping device. Features: The puncture assembly comprises a soft needle seat (27), an injection soft needle (28), an upper adhesive sheet (29), a puncture needle seat (30) and a puncture needle (31). The soft needle seat (27) is fixedly provided with an injection soft needle (28). The injection drug enters the patient's muscle tissue or subcutaneous tissue through the injection soft needle (28). The bottom surface of the soft needle seat (27) is provided with an upper adhesive sheet (29). The upper adhesive sheet (29) is a double-sided adhesive sheet. The top surface of the upper adhesive sheet (29) is in contact with the bottom surface of the soft needle seat (27). The upper adhesive sheet (29) is fixed by adhesive bonding, and the bottom surface of the upper adhesive sheet (29) is provided with anti-sticking paper. When the injection soft needle (28) is inserted into the patient's body, the upper adhesive sheet (29) is used to stick and fix the soft needle seat (27) and the patient's skin. The puncture needle (31) is fixedly arranged in the puncture needle seat (30), and the puncture needle (31) passes through the inner hole of the injection soft needle (28). The puncture needle (31) is used to puncture the patient's skin and pull the injection soft needle (28) into the patient's muscle tissue or subcutaneous tissue. The puncture needle seat (30) is provided with an annular groove (304), and an inner convex block (305) protruding inwardly is provided on the outer wall of the annular groove (304). The clamping device is provided with an insert (15) that is inserted and matched with the annular groove (304) of the puncture needle seat (30), and an outer convex block (18) protruding outwardly is provided on the outer wall of the insert (15). When the ejection device ejects the puncture assembly clamped by the clamping device, the outer convex block (18) and the inner convex block (305) cooperate with each other to prevent the puncture needle seat (30) from escaping from the clamping device.

2. The universal ejection aid for intramuscular or subcutaneous injection according to claim 1, characterized in that: The clamping device comprises a guide sleeve (11), two clamping pieces (12), a rotating shaft (13) and a clamping spring (14). The two clamping pieces (12) are arranged symmetrically on the left and right. The upper ends of the two clamping pieces (12) are hingedly connected via the rotating shaft (13). The middle parts of the two clamping pieces (12) are connected via the clamping spring (14). The lower parts of the two clamping pieces (12) are each provided with an insert piece (15) extending downward. The two clamping pieces (12), the rotating shaft (13) and the clamping spring (14) form a clamping sleeve (16) with a hollow structure. A clamping cavity (17) for clamping the soft needle seat (27) is provided at the lower part of the clamping sleeve (16) with a hollow structure. The inserting piece (15) is located in the clamping cavity (17). The guide sleeve (11) is installed in the shell (1), the guide sleeve (11) is a hollow structure, the clamping sleeve (16) is installed in the inner cavity of the guide sleeve (11), the side wall of the guide sleeve (11) is provided with a guide groove (21) arranged along the height direction of the guide sleeve (11), and the inner wall of the shell (1) is provided with a slider (23) that cooperates with the guide groove (21). The guide groove (21) and the slider (23) cooperate with each other and play a guiding role when the clamping device moves up and down relative to the shell (1). The outer wall of the clamping piece (12) is provided with an expansion groove (24) and a contraction groove (25) arranged from top to bottom along the height direction thereof. The depth of the expansion groove (24) is greater than the depth of the contraction groove (25). The slider (23) on the inner wall of the shell (1) passes through the guide slide groove (21) and contacts the expansion groove (24) or the contraction groove (25). When the clamping device moves upward relative to the shell (1), the slider (23) first contacts the expansion groove (24) and then contacts the contraction groove (25). The slider (23) presses the two clamping pieces (12) from outside to inside. The two clamping pieces (12) contract inward to clamp the puncture assembly. When the clamping device moves downward relative to the shell (1), the slider (23) first contacts the contraction groove (25) and then contacts the expansion groove (24). Under the action of the clamping spring (14), the two clamping pieces (12) expand from inside to outside to release the clamped puncture assembly.

3. The universal ejection aid for intramuscular or subcutaneous injection according to claim 2, characterized in that: The lower end of the clamping piece (12) is provided with a protrusion (26) arranged inwardly for preventing the puncture component from falling off after the clamping device clamps the puncture component.

4. The universal ejection aid for intramuscular or subcutaneous injection according to claim 1, characterized in that: The puncture needle seat (30) comprises an outer sleeve (301), a middle sleeve (302) and an inner cylinder (303) which are integrally structured and coaxially arranged in sequence from the outside to the inside. The lower end of the outer sleeve (301) is fixedly connected to the middle of the middle sleeve (302). An annular groove (304) is formed between the inner wall of the outer sleeve (301) and the outer wall of the middle sleeve (302). The inner protrusion (305) is located at the upper end of the inner wall of the outer sleeve (301). The lower end of the inner cylinder (303) is fixedly connected to the middle of the middle sleeve (302). The puncture needle (31) is fixed in the inner cylinder (303). The inner cavity of the middle sleeve (302) below the inner cylinder (303) is used for inserting the soft needle seat (27).

5. The universal ejection aid for intramuscular or subcutaneous injection according to claim 1, characterized in that: The soft needle seat (27) comprises an outer ring (271), a middle ring (272) and a needle seat (273) which are integrally structured and coaxially arranged from the outside to the inside. The lower ends of the outer ring (271), the middle ring (272) and the needle seat (273) are fixedly connected. The needle seat (273) is inserted into the inner cavity of the middle cylinder (302) from the lower end of the middle cylinder (302). The needle seat (273) is provided with an inner hole for inserting the soft injection needle (28). The soft injection needle (28) is inserted into the inner cavity of the middle cylinder (302) through the silicone rubber. The sealing block (274) is pressed into the inner hole, and the inner hole includes a silicone sealing hole, a funnel hole and a fine needle hole which are arranged and connected in sequence from top to bottom. The silicone sealing hole is used to install the silicone sealing block (274), and the funnel hole and the fine needle hole are used to insert the injection soft needle (28). The height of the needle seat (273) is higher than the height of the outer ring (271) and higher than the height of the middle ring (272). The upper end of the inner wall of the outer ring (271) is provided with inner teeth (275) protruding inward.

6. The universal ejection aid for intramuscular or subcutaneous injection according to claim 5, characterized in that: The soft needle seat (27) is provided with a clamping plate (32) that is engaged with the soft needle seat (27). The clamping plate (32) is used to clamp an infusion tube and an infusion needle. The clamping plate (32) comprises a body (321), an elastic ring (322), a handle (323), an outer clamping block (324) and a needle handle (325) of an integrated structure. The body (321) is provided with two symmetrically arranged elastic rings (322). One end of the elastic ring (322) is connected to the body (321), and the other end is suspended. The elastic ring (322) is provided with a handle (323). The handle (323) is operated to press the elastic ring (322) inwardly, so that the elastic ring (322) can be contracted toward the body (321). The outer lower part of the elastic ring (322) is provided with an outer clamping block (324), and the outer clamping block (324) is clamped under the inner teeth (275) of the soft needle seat (27) to realize the clamping connection between the clamping plate (32) and the soft needle seat (27). The lower end of the body (321) is provided with a cavity for plugging and connecting with the needle seat (273) of the soft needle seat (27). One side of the body (321) is provided with a needle handle (325). The body (321) and the needle handle (325) are provided with a clamping groove (326) for clamping an infusion needle and an infusion tube. The clamping groove (326) opens downward. The infusion needle is clamped in the center of the body (321), and the infusion needle is connected to the infusion tube.

7. The universal ejection aid for intramuscular or subcutaneous injection according to claim 5, characterized in that: The soft needle seat (27) is provided with a cover (33) that is snap-fitted with the soft needle seat (27). The cover (33) is used to seal the injection port at the upper end of the soft needle seat (27) through the cover (33) after the drug injection is completed. The cover (33) includes a cover plate of an integral structure and a connecting sleeve (34) located at the lower end of the cover plate. The connecting sleeve (34) is provided with an inner hole for inserting the needle seat (273) of the soft needle seat (27). The inner hole is a tapered hole, and the needle seat (273) of the soft needle seat (27) is tapered.

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