Syringe capable of preventing needle head from being blocked
By introducing a solvent supplement and a stirring rack into the syringe, the problem of needle blockage during benzine penicillin injection is solved, and the effect of reducing clogging and pain is achieved, and the nurse operation is simplified.
Patent Information
- Application Number
- CN202510232046.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-05-23
AI Technical Summary
Benzyl penicillin can easily cause needle clogging during injection. Although the existing methods can reduce clogging, it increases the pain of the patient and the difficulty of nurses in handling.
An anti-needle plugging syringe is designed, including a solvent supplement and a stirring rack. The solvent supplementary assembly pushes the solvent to the needle by punctured the coating to prevent drug precipitation and blockage; the stirring rack stirs the injection by rotating the stirring shaft to reduce particle aggregation.
It effectively reduces needle blockage, reduces the need for repeated injections, and does not need to replace large needles, reducing patient pain and nurse operation difficulty.
Smart Images
Figure CN120022464A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of medical devices, and in particular relates to a syringe that prevents needle clogging. Background Art
[0002] Benzathine penicillin is a long-acting penicillin. It is a sterile powder made by mixing penicillin dibenzylethylenediamine salt with an appropriate amount of buffer and suspending agent, and is usually used for intramuscular injection. In order to achieve a sustained-release effect, which is beneficial to drug stability and prolonging the release and absorption of the drug, benzathine penicillin is added with a sustained-release agent and a suspending agent during the production process. The suspending agent has a large surface free energy, has a spontaneous aggregation tendency and a growth tendency, and agglomerates after sedimentation under the action of gravity and cannot be dispersed. In clinical practice, the injection of benzathine penicillin by conventional intramuscular injection is very likely to cause needle blockage. In order to solve the problem of benzathine penicillin clogging the needle, the method commonly used in clinical practice is to increase the amount of solvent and replace the large needle and quickly push the intramuscular injection to reduce needle blockage and repeated injection, but this method requires fast push injection and short push injection time, which puts higher operating requirements on nurses, and the large needle will increase patient pain. Therefore, it is necessary to design a syringe that can effectively reduce the clogging of the needle by long-acting penicillin without replacing the large needle. Summary of the invention
[0003] The present invention is intended to provide a syringe that prevents needle clogging, so as to solve the problem of increasing the amount of solvent and replacing a large-sized needle to reduce the phenomenon of benzathine penicillin clogging the needle, thereby increasing the pain of the patient.
[0004] In order to achieve the above-mentioned purpose, the scheme of the present invention is: a needle clogging prevention syringe, comprising an empty barrel, a nipple, a first piston, a piston shaft and a piston handle, a solvent replenishing assembly is arranged on the outer wall of the empty barrel, the solvent replenishing assembly comprises a replenishing shell, a pushing piece and a replenishing tube, one end of the replenishing shell is closed and the other end is open, a second piston is slidably connected in the replenishing shell, a replenishing chamber is formed between the second piston and the replenishing shell, a coating film is arranged in the replenishing chamber, a solvent is filled between the coating film and the second piston, a puncture needle for piercing the coating film is arranged on the second piston, the pushing piece It is connected to the second piston through a connecting rod, and a threaded section is provided on the pushing piece, which is threadedly connected to the inner circumferential wall of the supplementary shell. One end of the supplementary tube is communicated with the supplementary chamber, and the other end of the supplementary tube is communicated with the nipple. A stirring frame is provided in the empty cylinder, and the stirring frame includes a plurality of stirring shafts and a cylinder fitted with the inner circumferential wall of the empty cylinder, and the stirring shaft is arranged along the axial direction of the empty cylinder. The first piston is provided with a channel for the stirring shaft to pass through, and a sealing soft film for sealing the channel is fixedly connected to a side wall of the first piston facing the nipple, and a deformable cavity for the stirring shaft to penetrate into is formed between the sealing soft film and the first piston.
[0005] The working principle and beneficial effects of this solution are:
[0006] (1) This solution adds a solvent replenishing component to the empty cylinder. After the empty cylinder draws out the benzathine penicillin injection, the second piston slides by rotating the pushing piece, the coating film is punctured by the needle, and the pushing piece is rotated continuously, so that the solvent in the replenishing chamber (the solvent refers to sterile water for injection or saline) is pushed to the nipple and fills the needle to prevent the benzathine penicillin from precipitating in the needle, effectively reducing the needle clogging phenomenon. Moreover, the solvent replenishing component will only work when needed and will not affect the empty cylinder from drawing out the benzathine penicillin injection.
[0007] (2) This solution adds a stirring frame in the empty cylinder, and the stirring frame can be rotated by rotating the piston shaft. In this way, after the empty cylinder sucks the benzathine penicillin injection, the benzathine penicillin injection in the empty cylinder can be stirred by rotating the stirring frame. The particles in the benzathine penicillin injection become smaller in diameter or less likely to agglomerate under the shear force, thereby effectively reducing the phenomenon of benzathine penicillin clogging the needle. In addition, the channel on the first piston through which the stirring shaft passes is sealed by a sealing soft film to prevent the benzathine penicillin injection in the empty cylinder from leaking out through the channel.
[0008] In summary, this scheme effectively reduces needle clogging through the two methods of filling the needle with solvent and stirring the benzathine penicillin injection in the empty cylinder, thereby effectively reducing repeated injections, eliminating the need to use large needles, and reducing patient pain.
[0009] Optionally, a driving gear is provided on the piston shaft, and a driven gear meshing with the driving gear is provided at one end of the pushing member away from the threaded section.
[0010] In this solution, when the piston shaft rotates, the driving gear and the driven gear are meshed to drive the pushing member to rotate, thereby stirring the benzathine penicillin injection while pushing the solvent to the nipple to fill the needle, thereby reducing the workload of nurses.
[0011] Optionally, a driving shaft is axially slidably connected to the pushing member, the driven gear is coaxially fixedly connected to the driving shaft, and the driving shaft is rotationally connected to the supplementary shell.
[0012] In this solution, the driving shaft is axially slidably connected to the pushing member. In this way, when the driving gear drives the driven gear to rotate, the driving shaft drives the pushing member to rotate, and the pushing member can move axially relative to the driving shaft, thereby ensuring that the driving gear and the driven gear will not move relative to each other axially during the meshing process.
[0013] Optionally, the sealing soft film is an elastic film.
[0014] In this solution, when the sealing soft film is an elastic film, the space occupied by the sealing soft film in the empty cylinder can be reduced, and the sealing soft film can be prevented from blocking the liquid inlet of the nipple.
[0015] Optionally, a plurality of supporting rods are provided on the stirring shaft along its axial direction.
[0016] In this solution, the arrangement of the support rod makes the outer peripheral wall of the stirring shaft uneven, which helps to improve the stirring effect.
[0017] Optionally, the angle between the axial direction of the support rod and the axial direction of the stirring shaft is 10° to 20°.
[0018] In this solution, the support rod is tilted to hook the sealing soft film and bring it to the channel of the first piston, effectively preventing the sealing soft film from blocking the liquid inlet of the nipple.
[0019] Optionally, there are three stirring shafts, and the three stirring shafts are evenly distributed along the circumference of the piston shaft.
[0020] In this solution, considering the space in the empty cylinder, it is more reasonable to set up three stirring shafts.
[0021] Optionally, one end of the hollow cylinder away from the nipple is detachably connected to an annular sealing cover, and one end of the cylinder away from the first piston abuts against the annular sealing cover.
[0022] In this solution, the cylinder is restricted in the empty cylinder by the annular cover, so that the nurse is prevented from manually fixing the cylinder when pulling out the piston shaft. In addition, after the annular cover is removed, the stirring frame can be taken out and reused after cleaning and disinfection.
[0023] Optionally, an ear piece is provided at one end of the hollow cylinder away from the nipple, and mounting holes are provided on the ear piece and the annular sealing cover.
[0024] In this solution, the annular cover is detachably mounted on the ear piece by means of bolts passing through the mounting holes and cooperating with nuts.
[0025] Optionally, a flared portion is provided at one end of the hollow cylinder away from the nipple, and the cylinder is rotatably connected to the flared portion via a bearing.
[0026] In this solution, the cylinder is rotatably connected in the empty cylinder through a bearing, and when the piston shaft is pulled out, the cylinder is fixed, thereby ensuring that the stirring frame will not separate from the empty cylinder. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is an axial partial cross-sectional view of a syringe for preventing needle blockage in Embodiment 1 of the present invention;
[0028] Figure 2 for Figure 1 A is an enlarged schematic diagram;
[0029] Figure 3 for Figure 1 Cross-sectional view of the empty cylinder in the AA direction;
[0030] Figure 4It is an axial partial cross-sectional view of the piston after the piston shaft is pulled outward in the first embodiment of the present invention;
[0031] Figure 5 for Figure 4 A magnified schematic diagram of B;
[0032] Figure 6 It is an axial partial cross-sectional view of a syringe for preventing needle blockage in Embodiment 2 of the present invention;
[0033] Figure 7 for Figure 6 A magnified schematic diagram of middle C;
[0034] Figure 8 for Figure 7 Schematic diagram of the structure after the middle pushing member moves to the left;
[0035] Fig. 9 It is an axial partial cross-sectional view of a syringe for preventing needle blockage in Embodiment 3 of the present invention;
[0036] Fig.10 for Fig. 9 A magnified schematic diagram of D in the middle;
[0037] Fig.11 This is an axial partial cross-sectional view of an anti-needle clogging syringe in Example 4 of the present invention. DETAILED DESCRIPTION
[0038] The following is further described in detail through specific implementation methods:
[0039] The symbols in the drawings of the specification include: empty cylinder 1, ear piece 101, flared portion 110, nipple 2, first piston 3, piston shaft 4, piston handle 5, needle 6, solvent replenishing assembly 7, replenishing shell 701, pushing member 702, sliding cavity 7021, sliding groove 7022, replenishing tube 703, second piston 704, coating film 705, puncture needle 706, connecting rod 707, stirring frame 8, stirring shaft 801, cylinder 802, annular cover 9, sealing soft film 10, bolt 11, driving gear 12, driving shaft 13, slide bar 1301, driven gear 14, rotating frame 15, bearing 16, support rod 17.
[0040] Embodiment 1
[0041] This embodiment is basically Figure 1 and Figure 2As shown: a needle clogging prevention syringe, comprising an empty barrel 1, a nipple 2, a first piston 3, a piston shaft 4 and a piston handle 5, wherein the nipple 2 is integrally formed with the empty barrel 1 and is used for clamping or threading with the needle 6. A solvent replenishing assembly 7 is welded on the outer wall of the empty barrel 1, and the solvent replenishing assembly 7 comprises a replenishing shell 701, a pushing member 702 and a replenishing tube 703. Among them, one end of the replenishing shell 701 is closed and the other end is open, and a second piston 704 is slidably connected in the replenishing shell 701, and a replenishing chamber is formed between the second piston 704 and the replenishing shell 701. A coating film 705 is provided in the replenishing chamber, and the surrounding of the coating film 705 is pasted on the inner wall of the replenishing chamber. The coating film 705 divides the space in the replenishing chamber into two independent spaces; a solvent is filled between the coating film 705 and the second piston 704, and the solvent is sterile water for injection or physiological saline; a puncture needle 706 for piercing the coating film 705 is provided on the second piston 704, and the puncture needle 706 can enter the replenishing tube 703 after piercing the coating film 705; in addition, a cross slice is integrally formed at the tip of the puncture needle 706, which is used to cut the coating film 705 and increase the incision of the coating film 705 so that the solvent can flow into the left space of the coating film 705.
[0042] The pushing member 702 is connected to the second piston 704 through a connecting rod 707. The pushing member 702 is provided with a threaded section that is threadedly connected to the inner circumferential wall of the supplementing shell 701. In this way, the pushing member 702 is connected to the second piston 704 through the connecting rod 707, so that the second piston 704 can slide on the smooth section of the inner wall of the supplementing shell 701 to ensure that the solvent will not leak. One end of the supplementing tube 703 is connected to the supplementing chamber, and the other end of the supplementing tube 703 is connected to the nipple 2. In this way, after the coating film 705 is punctured, the solvent can be pushed into the nipple 2 through the supplementing tube 703.
[0043] A stirring frame 8 is provided in the hollow cylinder 1. The stirring frame 8 includes a plurality of stirring shafts 801 and a cylinder 802 that fits the inner wall of the hollow cylinder 1. The stirring shafts 801 are arranged along the axial direction of the hollow cylinder 1. The stirring shafts 801 are welded to the inner wall of the cylinder 802. Figure 3 As shown, in this embodiment, the number of stirring shafts 801 is three, and the three stirring shafts 801 are evenly distributed along the circumference of the piston shaft 4. In addition, in this embodiment, in order to prevent the stirring frame 8 from detaching from the empty cylinder 1, the right end of the empty cylinder 1 (the nipple 2 is located at the left end of the empty cylinder 1) is detachably connected with an annular cover 9, so that the right end of the cylinder 802 is against the annular cover 9; specifically, the right end of the empty cylinder 1 is integrally formed with an ear piece 101, and the ear piece 101 and the annular cover 9 are both provided with mounting holes. The bolt 11 passes through the mounting hole and cooperates with the nut to fasten the ear piece 101 and the annular cover 9 together. The first piston 3 is provided with a channel for the stirring shaft 801 to pass through, and a sealing soft film 10 for sealing the channel is bonded to the left side wall of the first piston 3, and a deformable cavity is formed between the sealing soft film 10 and the first piston 3 for the stirring shaft 801 to penetrate.
[0044] When in use, the nurse holds the empty cylinder 1 in one hand and pulls the piston shaft 4 outward through the piston handle 5 with the other hand. The first piston 3 slides outward under the pull of the piston shaft 4, and negative pressure is formed in the empty cylinder 1, thereby sucking the benzathine penicillin injection into the empty cylinder 1. In addition, the benzathine penicillin injection can be directly sucked through the nipple 2, or the needle 6 can be pre-clamped on the nipple 2 and sucked through the needle 6. After the benzathine penicillin injection is sucked, the nurse pushes back the piston shaft 4 to exhaust the air in the empty cylinder 1. In the process of pulling the piston shaft 4 outward, the stirring frame 8 remains stationary, so the stirring shaft 801 moves to the left relative to the first piston 3, and the left end of the stirring shaft 801 gradually penetrates into the deformable cavity, thereby supporting the sealing soft film 10. In addition, in the process of the nurse pushing and pulling the piston shaft 4, the stirring shaft 801 can be used as a guide to ensure that the piston shaft 4 moves along the axial direction of the empty cylinder 1.
[0045] After the air in the empty cylinder 1 is exhausted, the nurse rotates the pushing member 702 clockwise. Since the pushing member 702 is threadedly connected to the replenishing shell 701, the pushing member 702 rotates clockwise while moving toward the replenishing chamber. The second piston 704 also slides toward the replenishing chamber under the push of the connecting rod 707, and the volume of the replenishing chamber is reduced. The puncture needle 706 pierces the coating film 705 to release the solvent. As the nurse continues to rotate the pushing member 702 clockwise, the second piston 704 continues to slide toward the replenishing chamber, and the solvent in the replenishing chamber is pushed into the nipple 2 through the replenishing tube 703 (the puncture needle 706 enters the replenishing tube 703, as shown in FIG. Figure 4 and Figure 5 As shown, since there is benzathine penicillin injection in the empty cylinder 1, the solvent flows into the needle 6 through the nipple 2, thereby filling the internal space of the needle 6 and preventing the benzathine penicillin from precipitating and clogging the needle 6.
[0046] After liquid drips out of the needle tip of the needle 6 (indicating that the solvent fills the internal space of the needle 6), the nurse rotates the piston shaft 4 through the piston handle 5, thereby driving the first piston 3 to rotate, and then driving the stirring frame 8 to rotate in the empty cylinder 1. The stirring shaft 801 rotates with the first piston 3, thereby stirring the benzathine penicillin injection in the empty cylinder 1. The particles in the benzathine penicillin injection become smaller in diameter or less likely to agglomerate under the action of shear force, thereby effectively reducing the phenomenon of benzathine penicillin blocking the needle 6. Moreover, during the whole process, the sealing soft film 10 prevents the benzathine penicillin injection from entering the channel, thereby preventing the benzathine penicillin injection from leaking through the channel of the first piston 3.
[0047] After the piston shaft 4 rotates several times, the nurse inserts the needle 6 into the patient's muscle and pushes the liquid medicine quickly, evenly and continuously.
[0048] In summary, in this embodiment, the needle 6 is filled with a solvent and the benzathine penicillin injection in the empty cylinder 1 is stirred. The clogging phenomenon of the needle 6 is effectively reduced, thereby effectively reducing repeated injections, and no large needle is required, which reduces the pain of the patient. In addition, since the annular cover 9 on the empty cylinder 1 can be removed and the stirring frame 8 does not contact the benzathine penicillin injection, the stirring frame 8 can be removed and then cleaned and disinfected for reuse to reduce the waste of medical resources.
[0049] Embodiment 2
[0050] The difference between this embodiment and the first embodiment is that: Figure 6 , Figure 7 and Figure 8 As shown, the piston shaft 4 is coaxially fixedly connected with a driving gear 12, and the pushing member 702 is axially slidably connected with a driving shaft 13. Specifically, the pushing member 702 is provided with a sliding cavity 7021 along its axial direction for the driving shaft 13 to slide, and the driving shaft 13 is integrally formed with a slide bar 1301, which is arranged along the axial direction of the driving shaft 13, and the inner wall of the sliding cavity 7021 is provided with a slide groove 7022 for the slide bar 1301 to be embedded, so that the pushing member 702 and the driving shaft 13 can slide relative to each other in the axial direction, but cannot rotate relative to each other in the radial direction. The driving shaft 13 is coaxially fixedly connected with a driven gear 14 meshing with the driving gear 12, and the driving shaft 13 is rotatably connected to the supplementary housing 701 through a rotating frame 15 and a bearing 16.
[0051] In this embodiment, after the air in the empty cylinder 1 is exhausted, the driving gear 12 on the piston shaft 4 is meshed with the driven gear 14 on the drive shaft 13. Therefore, when the nurse rotates the piston shaft 4 counterclockwise through the piston handle 5, the driving gear 12 drives the driven gear 14 to rotate clockwise, so that the drive shaft 13 drives the pushing member 702 to rotate clockwise. Since the drive shaft 13 and the pushing member 702 are axially slidably connected, and the pushing member 702 is threadedly connected to the replenishing shell 701, the pushing member 702 rotates clockwise while moving toward the replenishing chamber. The second piston 704 also slides toward the replenishing chamber under the push of the connecting rod 707, the volume of the replenishing chamber is reduced, and the puncture needle 706 pierces the coating film 705 to release the solvent. As the nurse continues to rotate the piston shaft 4 counterclockwise, the second piston 704 continues to slide toward the replenishing chamber, and the solvent in the replenishing chamber is pushed into the nipple 2 through the replenishing tube 703. Since there is benzathine penicillin injection in the empty cylinder 1, the solvent flows into the needle 6 through the nipple 2, thereby filling the internal space of the needle 6 and preventing the benzathine penicillin from precipitating and clogging the needle 6.
[0052] At the same time, when the nurse rotates the piston shaft 4 counterclockwise, the stirring frame 8 is driven to rotate counterclockwise in the empty cylinder 1, and the stirring shaft 801 rotates counterclockwise with the first piston 3, thereby stirring the benzathine penicillin injection in the empty cylinder 1. The particles in the benzathine penicillin injection become smaller in diameter or less likely to agglomerate under the shear force, thereby effectively reducing the phenomenon of benzathine penicillin blocking the needle 6. Moreover, during the whole process, the sealing soft film 10 prevents the benzathine penicillin injection from entering the channel, thereby preventing the benzathine penicillin injection from leaking.
[0053] In summary, compared with the first embodiment, in this embodiment, the nurse only needs to rotate the piston shaft 4 to push the solvent and stir the benzathine penicillin injection, which effectively reduces the nurse's operations and improves the nurse's work efficiency.
[0054] Embodiment 3
[0055] The difference between this embodiment and the second embodiment is that: Fig. 9 and Fig.10 As shown, a plurality of support rods 17 are provided along the axial direction of the stirring shaft 801, and the angle between the axial direction of the support rods 17 and the axial direction of the stirring shaft 801 is 10° to 20°. In this embodiment, the angle is 20°. In addition, the sealing soft film 10 in this embodiment is an elastic film.
[0056] In this embodiment, when the nurse pulls the first piston 3 outward, the stirring shaft 801 gradually stretches the elastic membrane (sealing soft membrane 10), and the elastic membrane (sealing soft membrane 10) is wrapped outside the stirring shaft 801. The existence of the support rod 17 makes the stirring shaft 801 uneven in appearance, which increases the stirring effect of the benzathine penicillin injection. Secondly, the support rod 17 is set at an angle, and it can also hook the elastic membrane (sealing soft membrane 10) and bring it to the channel of the first piston 3, effectively preventing the elastic membrane (sealing soft membrane 10) from blocking the liquid inlet of the nipple 2 (the liquid inlet of the nipple 2 refers to the connecting port between the nipple 2 and the empty cylinder 1) when the first piston 3 pushes the benzathine penicillin injection.
[0057] Embodiment 4
[0058] The difference between this embodiment and the third embodiment is that: Fig.11 As shown, in this embodiment, the end of the empty cylinder 1 away from the nipple 2 is no longer detachably connected to the annular cover 9. In order to prevent the stirring frame 8 from detaching from the empty cylinder 1, a flared portion 110 is provided at the end of the empty cylinder 1 away from the nipple 2, and the cylinder 802 is rotatably connected to the flared portion 110 via a bearing 16.
[0059] In this embodiment, the cylinder 802 is rotatably connected to the flared portion 110 of the hollow cylinder 1 via the bearing 16. The friction resistance encountered by the stirring frame 8 during rotation is small, and the nurse can more easily drive the stirring frame 8 to rotate.
[0060] The above are only embodiments of the present invention. The invention is not limited to the fields involved in this implementation case. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field to which the invention belongs before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the present invention. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.
Claims
1. A syringe for preventing needle clogging, comprising an empty barrel, a nipple, a first piston, a piston shaft and a piston handle, characterized in that: A solvent replenishing assembly is provided on the outer wall of the empty cylinder, and the solvent replenishing assembly includes a replenishing shell, a pushing piece and a replenishing tube. One end of the replenishing shell is closed and the other end is open. A second piston is slidably connected in the replenishing shell, a replenishing chamber is formed between the second piston and the replenishing shell, a coating film is provided in the replenishing chamber, a solvent is filled between the coating film and the second piston, a puncture needle for piercing the coating film is provided on the second piston, the pushing piece is connected to the second piston through a connecting rod, a threaded section is provided on the pushing piece that is threadedly connected to the inner circumferential wall of the replenishing shell, one end of the replenishing tube is communicated with the replenishing chamber, and the other end of the replenishing tube is communicated with the nipple; a stirring frame is provided in the empty cylinder, the stirring frame includes a plurality of stirring shafts and a cylinder fitted with the inner circumferential wall of the empty cylinder, the stirring shaft is arranged along the axial direction of the empty cylinder, the first piston is provided with a channel for the stirring shaft to pass through, a sealing soft film for sealing the channel is fixedly connected to a side wall of the first piston facing the nipple, and a deformable cavity for the stirring shaft to probe into is formed between the sealing soft film and the first piston.
2. The needle clogging prevention syringe according to claim 1, characterized in that: A driving gear is arranged on the piston shaft, and a driven gear meshing with the driving gear is arranged at one end of the pushing member away from the threaded section.
3. The needle clogging prevention syringe according to claim 2, characterized in that: The pushing member is axially slidably connected with a driving shaft, the driven gear is coaxially fixedly connected with the driving shaft, and the driving shaft is rotatably connected with the supplementary shell.
4. The needle clogging prevention syringe according to claim 1, characterized in that: The sealing soft film is an elastic film.
5. The needle clogging prevention syringe according to claim 1, characterized in that: The stirring shaft is provided with a plurality of supporting rods along its axial direction.
6. The needle clogging prevention syringe according to claim 5, characterized in that: The angle between the axial direction of the support rod and the axial direction of the stirring shaft is 10° to 20°.
7. The needle clogging prevention syringe according to claim 1, characterized in that: The number of the stirring shafts is three, and the three stirring shafts are evenly distributed along the circumference of the piston shaft.
8. The needle clogging prevention syringe according to claim 1, characterized in that: The end of the empty cylinder away from the nipple is detachably connected with an annular sealing cover, and the end of the cylinder away from the first piston abuts against the annular sealing cover.
9. The needle clogging prevention syringe according to claim 8, characterized in that: An ear piece is arranged at one end of the hollow cylinder away from the nipple, and mounting holes are arranged on the ear piece and the annular sealing cover.
10. The needle clogging prevention syringe according to claim 1, characterized in that: An end of the hollow cylinder away from the nipple is provided with a flared portion, and the cylinder is rotatably connected to the flared portion via a bearing.