Adjustable needle micro double-chamber syringe

Abstract

The present invention discloses a micro double-chamber syringe with an adjustable needle, comprising an outer syringe, an inner syringe, a one-way liquid inlet component arranged on the inner syringe, and a magnetic sliding part slidably arranged on the outer wall of the outer syringe; the outer syringe comprises an outer syringe barrel, a liquid inlet port 1 arranged on the bottom wall of the outer syringe barrel, a first piston component arranged inside the outer syringe, and a sealing cover sleeved on the liquid inlet port 1; the inner syringe barrel comprises an inner syringe barrel, a liquid outlet arranged on the bottom wall thereof and passing through the bottom wall of the outer syringe barrel, a one-way liquid inlet component arranged on the side of the inner syringe barrel close to the bottom wall, a second piston component arranged inside the inner syringe barrel, and a needle component connected to the liquid outlet; the micro double-chamber syringe with an adjustable needle of the present invention can achieve the purpose of constant single injection volume by arranging the outer syringe, inner syringe and one-way liquid inlet component of sleeve-type design; effectively improve the purpose of injection accuracy and prevent the problem of overinjection.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a micro double-chamber syringe with an adjustable needle for microinjection of scars in plastic surgery. Background Art

[0002] The itching and pain caused by hypertrophic scars and keloid scars affect people's work, life and social interactions to a certain extent.

[0003] Local injection of drugs such as glucocorticoids, represented by triamcinolone acetonide, can inhibit collagen deposition, promote fibroblast apoptosis, and inhibit the release of inflammatory factors, thereby inhibiting scar proliferation, reducing scar thickness, and improving scar appearance.

[0004] Triamcinolone acetonide has been widely used for local injections in the treatment of hypertrophic scars and keloids since 1960, with significant therapeutic efficacy. However, excessive local or total injection volumes can often cause local and systemic adverse reactions. Local adverse reactions occur in as many as 63% of patients and include severe pain, skin and subcutaneous tissue atrophy, pigmentation abnormalities, telangiectasia, and local ulcers. Systemic adverse reactions primarily include menstrual abnormalities and Cushing's syndrome in adult women. In 2013, Fredman reviewed all English literature on topical triamcinolone acetonide and proposed a relatively safe dosage of <40 mg / month for adults and <30 mg / month for children.

[0005] Therefore, for locally proliferative and raised scars, the local single-point injection volume of triamcinolone acetonide often needs to be precisely controlled to <0.05ml. Currently, low-dose syringes are often used, such as 1ml syringes, and the injection volume is difficult to precisely control.

[0006] At the same time, in order to avoid the need to repeatedly draw the drug solution from the medicine bottle when injecting a large area, the chance of needle contamination is reduced. At the same time, the number of times the needle punctures the bottle cap is reduced to avoid the needle becoming blunt after multiple punctures.

[0007] Based on the above reasons, there is an urgent need to design a micro double-chamber syringe with adjustable needle to overcome the above problems. Summary of the Invention

[0008] The purpose of the present invention is to overcome the shortcomings of the prior art. By setting up a sleeve-type outer syringe, an inner syringe and a one-way liquid inlet component, it can achieve the purpose of constant single injection volume; effectively improve the purpose of injection accuracy and prevent the problem of overinjection.

[0009] In order to achieve the above objectives, the present invention mainly provides the following technical solutions:

[0010] A micro double-chamber syringe with adjustable needle, comprising:

[0011] It comprises an outer syringe, an inner syringe, a one-way liquid inlet assembly arranged on the inner syringe, and a magnetic sliding member slidably arranged on the outer wall of the outer syringe;

[0012] The outer syringe comprises an outer syringe, a first liquid inlet provided on the bottom wall of the outer syringe, a first piston assembly provided inside the outer syringe, and a sealing cover sleeved on the first liquid inlet;

[0013] The inner syringe comprises an inner syringe, a liquid outlet provided on the bottom wall thereof and passing through the bottom wall of the outer syringe, a one-way liquid inlet assembly provided on a side of the inner syringe close to the bottom wall, a second piston assembly provided inside the inner syringe, and a needle assembly connected to the liquid outlet;

[0014] The inner syringe is fixed in the outer syringe and is arranged on one side of the outer syringe;

[0015] The magnetic sliding member slides along the sliding groove on the outer injection cylinder to realize the opening and closing of the one-way liquid inlet component.

[0016] Furthermore, the one-way liquid inlet component includes a second liquid inlet, a liquid inlet pipe provided on the second liquid inlet, an anti-backflow component provided in the liquid inlet pipe, and an adsorption cover provided at the pipe mouth of the liquid inlet pipe;

[0017] One end of the adsorption cover is connected to the liquid inlet pipe via a hinge, and an annular groove body having the same size as the pipe opening is provided on the inner wall of the adsorption cover;

[0018] A permanent magnet is embedded in the annular groove of the adsorption cover, and a soft magnetic strip that is attracted to the permanent magnet is arranged on the pipe mouth.

[0019] Furthermore, the adsorption cover is made of silicone; its diameter is slightly larger than the outer diameter of the pipe mouth;

[0020] The annular groove body can be embedded in the pipe mouth and the two are connected by magnetic adsorption.

[0021] Furthermore, the anti-backflow component is a valve one-way valve, the overall shape of which is an umbrella-shaped design; the direction of its protrusion is pointing to the position on one side of the inner injection cylinder; the valve one-way valve is composed of at least three valve pieces of equal size.

[0022] Furthermore, the chute is semi-annular, one end of which starts at position A of the outer injection barrel directly opposite the second liquid inlet, and the other end ends at position B on the symmetrical side of the starting position;

[0023] The protrusion of the slide groove is provided on the outer injection cylinder, and its height is 3 mm.

[0024] Furthermore, the magnetic sliding member is T-shaped, comprising a slider and a slider handle provided at the top of the slider; a micro magnet is embedded in the slider;

[0025] When the magnetic sliding member slides to position A, the micro magnet in the slider and the permanent magnet in the adsorption cover are attracted to each other, thereby quickly opening the adsorption cover, allowing the injection liquid in the outer syringe to enter the inner syringe;

[0026] When the magnetic sliding member slides to position B, the permanent magnet in the adsorption cover and the soft magnetic strip are adsorbed to each other to completely close the second liquid inlet.

[0027] Furthermore, the slider is embedded in the slide groove and can slide back and forth along the slide groove;

[0028] Anti-slip particles are provided on the outer wall of the sliding handle.

[0029] Furthermore, the first piston assembly includes a piston 1, a push rod 1 and a push handle 1;

[0030] The piston 1 is a piston member having an opening for the inner syringe to pass through. One end of the push rod 1 is connected to the piston 1 and is arranged parallel to the inner syringe. After the push rod 1 passes through the outer syringe, it is connected to the push handle 1.

[0031] Furthermore, the second piston assembly includes a second piston, a second push rod and a second push handle;

[0032] The second piston is arranged inside the inner syringe, and the second push rod thereof passes through the outer syringe and is connected to the second push handle;

[0033] The push handle 1 and the push handle 2 are symmetrically arranged and both are arranged in a semicircular shape. The push handle 1 and the push handle 2 are staggered.

[0034] Furthermore, the needle assembly uses a spiral needle with an adjustable needle.

[0035] The adjustable needle micro-double-chamber syringe of the present invention can achieve the purpose of maintaining a constant single injection volume by providing a sleeve-type outer syringe, an inner syringe, and a one-way liquid inlet assembly; effectively improve the purpose of injection accuracy and prevent the problem of overinjection;

[0036] The needle-adjustable micro-double-chamber syringe of the present invention allows the injection liquid in the outer syringe to enter the inner syringe in a unidirectional manner, thereby achieving the purpose of storing a fixed amount of injection liquid in the inner syringe and facilitating accurate control of the injection volume.

[0037] The needle-adjustable micro-double-chamber syringe of the present invention is provided with a one-way liquid inlet component and a backflow prevention component, which can further control the injection liquid to enter the inner syringe in one direction and avoid the problem of liquid backflow;

[0038] The needle-adjustable micro-double-chamber syringe of the present invention is provided with the one-way liquid inlet component and the magnetic sliding member provided on the outer syringe barrel, and the adsorption cover can be opened and closed by sliding the magnetic sliding member;

[0039] The above description is only an overview of the technical solution of the present invention. In order to clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following preferred embodiments of the present invention are described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 It is a structural schematic diagram of the dual-chamber synchronous syringe of the present invention;

[0042] Figure 2 The present invention Figure 1 Enlarged view of point A in the middle;

[0043] Figure 3 is a schematic structural diagram of the needle assembly of the present invention;

[0044] Figure 4 It is a structural schematic diagram of the one-way liquid inlet component and the magnetic sliding member of the present invention;

[0045] Figure 5 It is a structural schematic diagram of the one-way liquid inlet component of the present invention;

[0046] Description of reference numerals:

[0047] 1. External syringe; 11. External syringe barrel; 12. Liquid inlet 1; 13. First piston assembly; 14. Sealing cap; 15. Slide; 151. Position A; 152. Position B; 131. Piston 1; 132. Push rod 1; 133. Push handle 1;

[0048] 2. Inner syringe; 21. Inner syringe barrel; 22. Liquid outlet; 23. Second piston assembly; 24. Needle assembly; 231. Second piston; 232. Second push rod; 233. Second push handle;

[0049] 241. Needle seat; 242. Threaded cap; 243. Spring; 244. Needle;

[0050] 3. One-way liquid inlet assembly; 31. Second liquid inlet; 32. Liquid inlet pipe; 33. Anti-backflow assembly; 34. Pipe opening; 35. Adsorption cover; 36. Hinge; 37. Annular groove; 381. Permanent magnet; 382. Flexible magnetic strip; 331. Valve one-way valve; 332. Valve sheet;

[0051] 4. Magnetic sliding part; 41. Sliding block; 42. Sliding handle; 43. Anti-slip particles; 44. Micro magnet; DETAILED DESCRIPTION

[0052] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following, in combination with the accompanying drawings and preferred embodiments, describes in detail the specific implementation method, structure, characteristics and effects of the adjustable needle micro-dual-chamber syringe, preparation process and application system proposed in the present invention.

[0053] like Figure 1-5 As shown, the needle-adjustable micro-double-chamber syringe of the present invention,

[0054] It comprises an outer syringe 1, an inner syringe 2, a one-way liquid inlet component 3 provided on the inner syringe 2, and a magnetic sliding member 4 slidably provided on the outer wall of the outer syringe 1;

[0055] The outer syringe 1 comprises an outer syringe 11, a liquid inlet 12 provided on the bottom wall of the outer syringe 11, a first piston assembly 13 provided inside the outer syringe 11, and a sealing cover 14 sleeved on the liquid inlet 12;

[0056] The inner syringe 2 includes an inner syringe 21, a liquid outlet 22 provided on the bottom wall thereof and passing through the bottom wall of the outer syringe 11, a one-way liquid inlet assembly 3 provided on the side of the inner syringe 21 close to the bottom wall, a second piston assembly 23 provided inside the inner syringe 21, and a needle assembly 24 connected to the liquid outlet 22;

[0057] The inner syringe 21 is fixed in the outer syringe 11 and is arranged on one side of the outer syringe 11;

[0058] The magnetic sliding member 4 slides along the sliding groove 15 on the outer injection cylinder 11 to realize the opening and closing of the one-way liquid inlet component 3.

[0059] During use, the adjustable needle micro-dual-chamber syringe of the embodiment of the present application:

[0060] Before use, the operator should check the position of the magnetic sliding member 4 to ensure that it is located at position B 152. The permanent magnet 381 in the adsorption cover 35 and the soft magnetic strip 382 are attracted to each other to completely seal the second liquid inlet 31.

[0061] After the inspection is completed, first inject an appropriate amount of injection liquid into the outer syringe 1, remove the sealing cap 14 on the liquid inlet, insert it into the bottle body of the syringe, and draw the first piston to draw the injection liquid into the outer syringe 11; after the injection is completed, re-cover the sealing cap 14 for the liquid inlet to ensure that it is in a sealed state;

[0062] Then, the magnetic slide 4 is moved along the slide groove 15 to reach position A 151. The micro magnet 44 in the slide 41 and the permanent magnet 381 in the adsorption cover 35 are attracted to each other, thereby quickly opening the adsorption cover 35. At this time, the operator slowly pulls the second piston outward, and the injection liquid in the outer syringe 11 passes through the one-way injection assembly and enters the inner syringe 21. When the injection liquid in the inner syringe 21 reaches the injection volume for one time, the pulling of the second piston is stopped. At the same time, pay attention to quickly slide the magnetic slide 4 back to position B 152 to ensure that the second liquid inlet 31 is completely closed.

[0063] The operator can push the handle 233 to complete the injection.

[0064] It should be noted that the capacity of the outer syringe 1 is preferably 1 ml, and the capacity of the inner syringe 2 is preferably 0.02 ml, so as to achieve the purpose of quantitative microinjection.

[0065] like Figure 3 and Figure 4 As shown, the needle-adjustable micro-double-chamber syringe of the present invention, the one-way liquid inlet component 3 includes a second liquid inlet 31, a liquid inlet pipe 32 provided on the second liquid inlet 31, an anti-backflow component 33 provided in the liquid inlet pipe 32, and an adsorption cap 35 provided at the pipe mouth 34 of the liquid inlet pipe 32;

[0066] One end of the adsorption cover 35 is connected to the liquid inlet pipe 32 via a hinge 36, and an annular groove 37 of the same size as the pipe opening 34 is provided on the inner wall of the adsorption cover 35;

[0067] A permanent magnet 381 is embedded in the annular groove 37 of the adsorption cover 35 , and a soft magnetic strip 382 that is attracted to the permanent magnet 381 is provided on the pipe mouth 34 .

[0068] In the needle-adjustable micro double-chamber syringe of the embodiment of the present application, the one-way liquid inlet component 3 is arranged at the second liquid inlet 31; a liquid inlet tube 32 is integrally provided at the second liquid inlet 31, and an adsorption cover 35 is provided at the liquid inlet tube 32; a permanent magnet 381 is provided in the adsorption cover 35, which can be adsorbed and connected with the soft magnetic strip 382 arranged around the tube mouth 34; and it can be adsorbed and connected with the micro magnet 44 in the magnetic sliding part 4 to control the opening and closing of the adsorption cover 35.

[0069] In the adjustable needle micro-double-chamber syringe of the embodiment of the present application, the one-way liquid inlet component 3 is provided on the inner syringe 21, which is not only used to block the second liquid inlet 31, but also has the purpose of freely opening and closing the second liquid inlet 31;

[0070] An anti-backflow component 33 is also provided on the inner wall of the liquid inlet pipe 32 to further prevent the problem of liquid backflow;

[0071] like Figure 4 and Figure 5 As shown, in the adjustable needle micro double-chamber syringe of the present invention, the adsorption cover 35 is made of silicone; its diameter is slightly larger than the outer diameter of the tube mouth 34; the annular groove body 37 can be embedded in the tube mouth 34 and the two are connected by magnetic adsorption.

[0072] In the adjustable needle micro-double-chamber syringe of the embodiment of the present application, the adsorption cover 35 can be covered on the tube mouth 34 and the two are connected by magnetic adsorption.

[0073] like Figure 4 As shown, in the needle-adjustable micro double-chamber syringe of the present invention, the anti-backflow component 33 is a valve one-way valve 331, and the overall shape is an umbrella-shaped design; the protrusion direction is pointing to the position on one side of the inner syringe 21; the valve one-way valve 331 is composed of at least three valve pieces 332 of equal size.

[0074] The needle-adjustable micro-double-chamber syringe of the embodiment of the present application is provided with the anti-backflow component 33. Since the valve one-way valve 331 is arranged in an umbrella shape and its protruding direction points to one side of the inner syringe 21, when the liquid in the outer syringe 11 enters the inner syringe 21 under the pull of the second piston, the valve one-way valve 331 quickly opens to allow the injection liquid to enter; when the adsorption cover 35 is covered, the valve one-way valve 331 is in a closed state, which can effectively prevent the injection liquid in the inner syringe 21 from entering the outer syringe 11.

[0075] like Figure 2 As shown, in the adjustable needle micro dual-chamber syringe of the present invention, the slide groove 15 is semi-annular, one end of which starts at position A 151 of the outer syringe 11 opposite to the second liquid inlet 31, and the other end ends at position B 152 on the symmetrical side of the starting position; the protrusion of the slide groove 15 is provided on the outer syringe 11, and its height is 3 mm.

[0076] In the adjustable needle micro-double-chamber syringe of the embodiment of the present application, the slide groove 15 is provided on the outer syringe 11 , and allows the magnetic sliding member 4 to slide to control the opening and closing of the adsorption cover 35 .

[0077] like Figure 3As shown, the needle-adjustable micro-double-chamber syringe of the present invention, the magnetic sliding member 4 is T-shaped, comprising a slider 41 and a slider handle 42 provided at the top of the slider 41; the slider 41 is embedded with a micro magnet 44;

[0078] When the magnetic sliding member 4 slides to position A 151 , the micro magnet 44 in the sliding member 41 and the permanent magnet 381 in the adsorption cover 35 are attracted to each other, thereby quickly opening the adsorption cover 35 , allowing the injection liquid in the outer syringe 11 to enter the inner syringe 21 ;

[0079] When the magnetic sliding member 4 slides to the position B 152 , the permanent magnet 381 in the adsorption cover 35 and the soft magnetic strip 382 are adsorbed to each other to completely seal the second liquid inlet 31 .

[0080] In the needle-adjustable micro-double-chamber syringe of the embodiment of the present application, the operator can control the opening and closing of the adsorption cover 35 by sliding the position of the magnetic slider 4; therefore, the magnetism in the magnetic slider 4 needs to be greater than the magnetism of the soft magnetic strip 382, so when the magnetic slider 4 slides to A 151, the adsorption cover 35 can be opened under the adsorption force of the magnetic slider 4 to allow the injection liquid to enter the inner syringe 21; then the magnetic slider 4 is moved to B 152, and the direction of its magnetic force changes, and the adsorption cover 35 is fastened and stuck at the position of the tube mouth 34 of the liquid inlet 2 31 under the dual magnetic adsorption force of the soft magnetic strip 382 and the magnetic slider 4.

[0081] like Figure 4 As shown, in the adjustable needle micro double-chamber syringe of the present invention, the slider 41 is embedded in the slide groove 15 and can slide back and forth along the slide groove 15; the outer wall of the slide handle 42 is provided with anti-slip particles 43.

[0082] like Figure 1 As shown, the needle-adjustable micro-double-chamber syringe of the present invention, the first piston assembly 13 includes a piston 131, a push rod 132 and a push handle 133;

[0083] The piston 131 is a piston member having an opening for the inner syringe 21 to pass through. One end of the push rod 132 is connected to the piston 131 and is arranged parallel to the inner syringe 21; the push rod 132 passes through the outer syringe 11 and is connected to the push handle 133.

[0084] like Figure 1 As shown, the needle-adjustable micro-double-chamber syringe of the present invention, the second piston assembly 23 includes a second piston 231, a second push rod 232 and a second push handle 233;

[0085] The second piston 231 is disposed inside the inner syringe 21 , and the second push rod 232 thereof passes through the outer syringe 11 and is connected to the second push handle 233 .

[0086] like Figure 1 As shown, in the needle-adjustable micro double-chamber syringe of the present invention, the push handle 133 and the push handle 2 233 are symmetrically arranged and both are arranged in a semicircular shape, and the push handle 133 and the push handle 2 233 are staggered.

[0087] In the needle-adjustable micro-double-chamber syringe of the embodiment of the present application, the push handle 133 and the push handle 2 233 are separately arranged and do not affect their respective push-pull operations, so they will not affect the push-injection work of the outer syringe 11 and the inner syringe 21 respectively.

[0088] like Figure 3 As shown, in the adjustable needle micro double-chamber syringe of the present invention, the needle 244 component 24 uses a spiral needle 244 with an adjustable needle 244.

[0089] It should be noted that the spiral needle 244 of the adjustable needle 244 uses the common spiral needle 244 on the market, which is composed of a needle 244 seat 241, a threaded cap 242, a spring 243 arranged in the threaded cap 242 and a needle 244; one end of the needle 244 is connected to the needle 244 seat 241, and the tip of the other end passes through the threaded cap 242 and the spring 243 in sequence until it passes through the front end opening of the threaded cap 242; the tail end of the threaded cap 242 is screwed to the external thread on the outer wall of the needle 244 seat 241; the length of the needle 244 extending out of the threaded cap 242 can be adjusted by rotating the threaded cap 242, thereby achieving the purpose of adjusting the length of the needle 244.

[0090] The present invention is further described above in conjunction with the embodiments, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. Adjustable needle micro double-chamber syringe, characterized by: It includes: It comprises an outer syringe (1), an inner syringe (2), a one-way liquid inlet assembly (3) provided on the inner syringe (2), and a magnetic sliding member (4) slidably provided on the outer wall of the outer syringe (1); The outer syringe (1) comprises an outer syringe (11), a liquid inlet (12) provided on the bottom wall of the outer syringe (11), a first piston assembly (13) provided inside the outer syringe (11), and a sealing cover (14) sleeved on the liquid inlet (12); The inner syringe (2) comprises an inner syringe (21), a liquid outlet (22) provided on the bottom wall thereof and penetrating the bottom wall of the outer syringe (11), a one-way liquid inlet assembly (3) provided on a side of the inner syringe (21) close to the bottom wall, a second piston assembly (23) provided inside the inner syringe (21), and a needle (244) assembly (24) connected to the liquid outlet (22); The inner injection cylinder (21) is fixedly arranged in the outer injection cylinder (11) and the inner injection cylinder (21) is arranged on one side of the outer injection cylinder (11); The magnetic sliding member (4) slides along the sliding groove (15) on the outer injection cylinder (11) to realize the opening and closing of the one-way liquid inlet component (3); The one-way liquid inlet assembly (3) comprises a second liquid inlet (31), a liquid inlet pipe (32) provided on the second liquid inlet (31), a backflow prevention assembly (33) provided in the liquid inlet pipe (32), and an adsorption cover (35) provided at the pipe opening (34) of the liquid inlet pipe (32); One end of the adsorption cover (35) is connected to the liquid inlet pipe (32) via a hinge (36), and an annular groove (37) having the same size as the pipe opening (34) is provided on the inner wall thereof; A permanent magnet (381) is embedded in the annular groove (37) of the adsorption cover (35), and a soft magnetic strip (382) adsorbed to the permanent magnet (381) is provided on the pipe mouth (34). The first piston assembly (13) includes a piston (131), a push rod (132) and a push handle (133); The piston 1 (131) is a piston member having an opening for the inner syringe (21) to pass through. One end of the push rod 1 (132) is connected to the piston 1 (131) and is arranged parallel to the inner syringe (21); the push rod 1 (132) passes through the outer syringe (11) and is connected to the push handle 1 (133).

2. The adjustable needle micro-dual-chamber syringe according to claim 1, characterized in that: The adsorption cover (35) is made of silica gel; its diameter is slightly larger than the outer diameter of the pipe mouth (34); The annular groove body (37) can be embedded in the pipe mouth (34) and the two are connected by magnetic adsorption.

3. The adjustable needle micro-double-chamber syringe according to claim 2, characterized in that: The anti-backflow component (33) is a valve one-way valve (331) with an overall umbrella-shaped design; its protrusion is directed toward the position on one side of the inner injection cylinder (21); the valve one-way valve (331) is composed of at least three valve pieces (332) of equal size.

4. The adjustable needle micro-double-chamber syringe according to claim 3, characterized in that: The chute (15) is semi-circular, one end of which starts at position A (151) of the outer injection cylinder (11) opposite to the second liquid inlet (31), and the other end ends at position B (152) on the symmetrical side of the starting position; The protrusion of the slide groove (15) is provided on the outer injection cylinder (11), and its height is 3 mm.

5. The adjustable needle micro-dual-chamber syringe according to claim 4, characterized in that: The magnetic sliding member (4) is T-shaped and comprises a slider (41) and a slider handle (42) provided at the top end of the slider (41); a micro magnet (44) is embedded in the slider (41); When the magnetic sliding member (4) slides to position A (151), the micro magnet (44) in the sliding member (41) and the permanent magnet (381) in the adsorption cover (35) are attracted to each other, thereby quickly opening the adsorption cover (35) to allow the injection liquid in the outer syringe (11) to enter the inner syringe (21); When the magnetic sliding member (4) slides to position B (152), the permanent magnet (381) in the adsorption cover (35) and the soft magnetic strip (382) are adsorbed to each other to completely close the second liquid inlet (31).

6. The adjustable needle micro-double-chamber syringe according to claim 5, characterized in that: The slider (41) is embedded in the slide groove (15) and can slide back and forth along the slide groove (15); Anti-skid particles (43) are provided on the outer wall of the sliding handle (42).

7. The adjustable needle micro-double-chamber syringe according to claim 6, characterized in that: The second piston assembly (23) includes a second piston (231), a second push rod (232) and a second push handle (233); The second piston (231) is arranged inside the inner injection cylinder (21), and the second push rod (232) thereof passes through the outer injection cylinder (11) and is connected to the second push handle (233); The push handle 1 (133) and the push handle 2 (233) are symmetrically arranged and both are arranged in a semicircular shape. The push handle 1 (133) and the push handle 2 (233) are staggered.

8. The micro-double-chamber syringe with adjustable needle according to claim 7, characterized in that: The needle (244) assembly (24) uses a spiral needle (244) that is an adjustable needle (244).

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