Spirally-connected syringe needle tip

Abstract

The invention relates to the technical field of medical instruments, in particular to a spirally-connected syringe needle tip which comprises a syringe needle seat, a threaded connecting block fixedly connected to the outside of the syringe needle seat, a connecting tube fixedly connected to the inside of the syringe needle seat, a needle tip sleeve slidably connected to the inside of the connecting tube, and a syringe needle tip fixedly connected to the outside of the needle tip sleeve. An air channel is formed in the syringe needle point, an air inlet is fixedly connected to the outer portion of the air channel, a valve is fixedly connected to the interior of the air inlet, an annular sliding groove is fixedly connected to the interior of the air inlet, and a switch valve is fixedly connected to the outer portion of the annular sliding groove. The threaded connection block is arranged outside the syringe needle seat and can be in threaded connection with the needle cylinder to improve connection stability, when liquid is extracted, the negative pressure in the penicillin bottle is increased, the pressure difference between the left side and the right side of the valve is increased, air can enter the penicillin bottle from the air channel to adjust the negative pressure in the bottle after the valve is opened, and therefore the difficulty that a user extracts liquid medicine in the bottle is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a syringe tip with a spiral connection. Background Art

[0002] A syringe tip with a spiral connection is an innovative syringe design that uses a spiral connection mechanism to ensure accurate, safe, and leak-free drug delivery. The core idea behind this design is to provide a better injection experience and more effective drug delivery. The syringe tip with a spiral connection can be easily connected to the syringe body, ensuring a perfect seal and firmly fixing the needle during injection to prevent accidental loosening or liquid leakage. This innovative design has also been widely applied to various syringe models and uses, including medical institutions, home care, and vaccination. The background and characteristics of the syringe tip with a spiral connection make it a safer and more reliable choice for the injection process. Whether it is professional medical staff or patients self-injecting drugs, they can obtain a better user experience and effect from this innovative design.

[0003] In the prior art, syringes are often needed for debugging pharmaceuticals in hospitals. However, most of the existing syringe tips are snap-connected, resulting in unstable connections. Moreover, when absorbing the liquid medicine in a vial, the negative pressure in the vial gradually increases, which causes difficulty in extraction and is rather laborious, thus affecting the debugging. Therefore, a syringe tip with a spiral connection is proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that in the prior art, syringes are often needed for debugging pharmaceuticals in hospitals. However, most of the existing syringe tips are snap-connected, resulting in unstable connections. Moreover, when absorbing the liquid medicine in a vial, the negative pressure in the vial gradually increases, which causes difficulty in extraction and is rather laborious, thus affecting the debugging. And a syringe tip with a spiral connection is proposed.

[0005] To achieve the above purpose, the present invention adopts the following technical scheme:

[0006] A syringe tip with a spiral connection, comprising a syringe needle seat, a threaded connection block fixedly connected to the outside of the syringe needle seat, a connecting pipe fixedly connected to the inside of the syringe needle seat, a needle tip sleeve slidably connected to the inside of the connecting pipe, a syringe needle tip fixedly connected to the outside of the needle tip sleeve, an air passage arranged inside the syringe needle tip, an air inlet fixedly connected to the outside of the air passage, and a valve fixedly connected to the inside of the air inlet;

[0007] An annular chute is fixedly connected inside the air inlet. A switching valve is fixedly connected outside the annular chute. A control box body is fixedly connected inside the switching valve. A servo motor is fixedly connected inside the control box body. A fourth gear is fixedly connected outside the servo motor. A second rack is meshed and connected outside the fourth gear. A connecting rod is fixedly connected outside the second rack. A transmission baffle is fixedly connected outside the connecting rod. The transmission baffle is slidably connected to the annular chute;

[0008] Among them, the needle tip sleeve is communicated with the syringe needle tip. There are two transmission baffles. When the transmission baffles are closed, gas and liquid cannot pass through. The number of connecting rods is two. The air duct is communicated with the air inlet. The valve can open and close independently according to the internal and external pressure difference.

[0009] The above technical solution further includes:

[0010] A first rack is meshed and connected outside the fourth gear. A connecting rod is fixedly connected outside the first rack.

[0011] A fourth gear is rotatably connected inside the control box body.

[0012] A transmission platform is fixedly connected inside the control box body. The first rack is slidably connected to the outside of the transmission platform. The second rack is slidably connected to the outside of the transmission platform;

[0013] Among them, the number of transmission platforms is two.

[0014] A syringe needle tip is fixedly connected outside the air inlet.

[0015] A fixed buckle is rotatably connected to the outside of the syringe needle seat. A first gear is snap-connected to the outside of the fixed buckle. A knob is fixedly connected to the outside of the first gear. A third gear is fixedly connected to the outside of the knob. A second gear is meshed and connected to the outside of the third gear. A bearing is rotatably connected to the outside of the second gear. The bearing is fixedly connected to the outside of the syringe needle seat.

[0016] A connecting pipe is fixedly connected to the outside of the bearing. A second gear is rotatably connected to the outside of the connecting pipe. A needle tip sleeve is threadedly connected inside the second gear;

[0017] Among them, the connection between the bearing and the connecting pipe is tight and there is no liquid leakage. The needle tip sleeve fits tightly with the inner wall of the connecting pipe and there is no liquid leakage. Threads are provided on the outside of the needle tip sleeve. Threads corresponding to the needle tip sleeve are provided inside the second gear.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In the present invention, during use, a threaded connection block is provided outside the syringe needle seat, which can be threadedly connected to the syringe barrel to improve the connection stability. When drawing liquid, due to the increase in negative pressure inside the vial, the pressure difference on both sides of the valve increases, the valve opens, and air can enter the vial from the airway to adjust the negative pressure inside the vial, reducing the pressure during extraction. When injecting the liquid medicine, turning on the servo motor can drive the fourth gear to rotate. The rotation of the fourth gear can drive the first rack and the second rack to move, and then drive the transmission baffle fixedly connected through the connecting rod to move. Therefore, the opening and closing of the transmission baffle can be controlled by the servo motor, ensuring that the liquid medicine will not overflow from the airway to the outside of the vial, causing pollution, which is safe and effective.

[0020] 2. In the present invention, during use, turning the knob can drive the third gear to rotate. The rotation of the third gear can drive the second gear to rotate. The rotation of the second gear can drive the needle tip sleeve connected by threads to move, and then drive the syringe needle tip to move. Therefore, the lifting of the syringe needle tip can be controlled by turning the knob. When installing the needle, by controlling the syringe needle tip to retract into the syringe needle seat through the knob, it can avoid the syringe needle tip from hurting the user during needle installation. After installation, controlling the syringe needle tip to rise can be used for injection, which is highly practical, convenient to install, and improves the safety of the needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a syringe needle tip with a spiral connection proposed by the present invention;

[0022] Figure 2 is a schematic external structure diagram of the present invention;

[0023] Figure 3 is a first three-dimensional structural diagram of the present invention;

[0024] Figure 4 is a second three-dimensional structural diagram of the present invention;

[0025] Figure 5 is a third three-dimensional structural diagram of the present invention;

[0026] Figure 6 is a fourth three-dimensional structural diagram of the present invention;

[0027] Figure 7 is a fifth three-dimensional structural diagram of the present invention;

[0028] Figure 8 is a sixth three-dimensional structural diagram of the present invention;

[0029] Figure 9 is a seventh three-dimensional structural diagram of the present invention.

[0030] In the figure: 1. Syringe needle seat; 2. Needle tip cover; 3. Syringe needle tip; 4. Threaded connection block; 5. Fixed buckle; 6. Knob; 7. First gear; 8. Connecting pipe; 9. Second gear; 10. Bearing; 11. Third gear; 12. Air passage; 13. Air inlet; 14. Switch valve; 15. Annular chute; 16. Control box body; 17. Transmission baffle; 18. Servo motor; 19. Fourth gear; 20. First rack; 21. Second rack; 22. Connecting rod; 23. Transmission table; 24. Valve flap. Detailed implementation mode

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment 1

[0033] As Figures 1-9 shown, a spiral-connected syringe needle tip proposed by the present invention includes a syringe needle seat 1, a threaded connection block 4 is fixedly connected to the outside of the syringe needle seat 1, a connecting pipe 8 is fixedly connected to the inside of the syringe needle seat 1, a needle tip cover 2 is slidably connected to the inside of the connecting pipe 8, a syringe needle tip 3 is fixedly connected to the outside of the needle tip cover 2, an air passage 12 is arranged inside the syringe needle tip 3, an air inlet 13 is fixedly connected to the outside of the air passage 12, and a valve flap 24 is fixedly connected to the inside of the air inlet 13;

[0034] An annular chute 15 is fixedly connected to the inside of the air inlet 13, a switch valve 14 is fixedly connected to the outside of the annular chute 15, a control box body 16 is fixedly connected to the inside of the switch valve 14, a servo motor 18 is fixedly connected to the inside of the control box body 16, and a fourth gear 19 is fixedly connected to the outside of the servo motor 18;

[0035] The outside of the fourth gear 19 is meshed with a second rack 21, a connecting rod 22 is fixedly connected to the outside of the second rack 21, a transmission baffle 17 is fixedly connected to the outside of the connecting rod 22, and the transmission baffle 17 is slidably connected to the annular chute 15;

[0036] The outside of the fourth gear 19 is meshed with a first rack 20, a connecting rod 22 is fixedly connected to the outside of the first rack 20, the fourth gear 19 is rotatably connected to the inside of the control box body 16, a transmission table 23 is fixedly connected to the inside of the control box body 16, the first rack 20 is slidably connected to the outside of the transmission table 23, the second rack 21 is slidably connected to the outside of the transmission table 23, and the syringe needle tip 3 is fixedly connected to the outside of the air inlet 13.

[0037] The working principle of the syringe needle tip with a spiral connection proposed by the present invention is that during use, the threaded connection block 4 provided below the syringe needle seat 1 can achieve the threaded connection between the needle head and the syringe barrel. Compared with the traditional snap connection method, the threaded connection improves the connection stability and the stability of the needle head during syringe use;

[0038] When sucking the medicine in the vial, as the amount of the sucked liquid medicine increases, the negative pressure in the vial will also increase accordingly. The increase in the negative pressure in the vial will increase the difficulty of sucking the liquid medicine in the vial. When the negative pressure in the vial is too high, the valve 24 provided in the air inlet 13 will open due to the pressure difference inside and outside, and the external air can enter the vial through the valve 24 to adjust the negative pressure in the vial, reducing the difficulty of sucking the liquid medicine in the vial;

[0039] When it is necessary to inject the liquid medicine into the vial, since the positive pressure in the vial will increase, it will also cause a pressure difference inside and outside the valve 24, resulting in the opening of the valve 24, which will cause the liquid medicine in the vial to flow out and cause pollution. By controlling the servo motor 18 fixedly connected in the control box body 16, the fixedly connected fourth gear 19 can be driven to rotate. The rotation of the fourth gear 19 can drive the first rack 20 and the second rack 21 engaged and connected to move inward. The inward movement of the first rack 20 and the second rack 21 can drive the connecting rod 22 to move. The movement of the connecting rod 22 can drive the fixedly connected transmission baffle 17 to move inward and close. Therefore, the servo motor 18 can control the closing of the transmission baffle 17 to prevent the liquid from passing through, making the valve 24 ineffective, thereby ensuring that the liquid in the vial cannot flow out of the vial through the air passage 12 and the air inlet 13 and cause pollution, improving the safety of the needle head;

[0040] When sucking the liquid medicine, by controlling the reverse rotation of the servo motor 18, the fixedly connected fourth gear 19 can be driven to reverse, causing the first rack 20 and the second rack 21 engaged and connected to move to both sides. The movement of the first rack 20 and the second rack 21 to both sides can drive the fixedly connected connecting rod 22 to move to both sides, and further drive the fixedly connected transmission baffle 17 to move to both sides and open. When the transmission baffle 17 is opened, it no longer blocks the gas and the liquid, and the function of the valve 24 is restored, and the pressure inside and outside the vial can continue to be balanced, which is simple and effective and improves the use effect of the needle head.

[0041] Embodiment 2

[0042] As Figures 1-9 shown, a fixed buckle 5 is rotatably connected to the outside of the syringe needle seat 1, a first gear 7 is snap-connected to the outside of the fixed buckle 5, a knob 6 is fixedly connected to the outside of the first gear 7, and a third gear 11 is fixedly connected to the outside of the knob 6;

[0043] The third gear 11 is externally meshed and connected to the second gear 9. The second gear 9 is rotatably connected to a bearing 10 externally. The bearing 10 is fixedly connected to a syringe needle seat 1 externally.

[0044] The bearing 10 is fixedly connected to a connecting pipe 8 externally. The connecting pipe 8 is rotatably connected to the second gear 9 externally. The second gear 9 is internally threaded with a needle tip sleeve 2.

[0045] The working principle of the syringe needle tip with a spiral connection proposed by the present invention is that since the syringe needle tip 3 is relatively long, when installing the needle, if not careful, the syringe needle tip 3 can easily cause harm to the user. By rotating the knob 6, the fixedly connected third gear 11 can be driven to rotate. The rotation of the third gear 11 can drive the meshed second gear 9 to rotate. The second gear 9 is rotatably connected to a bearing 10 externally. The bearing 10 is fixedly connected to a syringe needle seat 1 externally. While the bearing 10 fixes the second gear 9, it can ensure that the second gear 9 rotates freely. The rotation of the second gear 9 can drive the threadedly connected needle tip sleeve 2 to move downward. The downward movement of the needle tip sleeve 2 can drive the fixedly connected syringe needle tip 3 to move downward. Therefore, by rotating the knob 6, the downward movement of the syringe needle tip 3 can be controlled to enter the syringe needle seat 1, preventing the syringe needle tip 3 from causing harm to the user when the user installs the needle.

[0046] After the installation is completed, reversing the knob 6 can drive the fixedly connected third gear 11 to reverse. The reverse rotation of the third gear 11 can drive the meshed second gear 9 to reverse, and then drive the threadedly connected needle tip sleeve 2 to move upward. Therefore, by reversing the knob 6, the upward movement of the syringe needle tip 3 can be controlled to reset. When the knob 6 rotates, the fixedly connected first gear 7 will rotate with the knob 6. By snap-fitting the fixed buckle 5 to the first gear 7, the first gear 7 can be fixed so that the knob 6 cannot rotate, thereby fixing the position of the syringe needle tip 3. The operation is simple, the practicability is strong, and the safety of the needle is improved while facilitating the installation.

[0047] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined within the scope of the appended claims and their equivalents.

Claims

1. A spirally connected syringe needle tip, comprising a syringe needle holder (1), characterized in that: The syringe needle seat (1) is fixedly connected to a threaded connection block (4) on the outside, the syringe needle seat (1) is fixedly connected to a connection tube (8) on the inside, the connection tube (8) is slidably connected to a needle tip sleeve (2) on the inside, the needle tip sleeve (2) is fixedly connected to a syringe needle tip (3) on the outside, an airway (12) is provided inside the syringe needle tip (3), the airway (12) is fixedly connected to an air inlet (13) on the outside, and a valve (24) is fixedly connected to the inside of the air inlet (13); The air inlet (13) is fixedly connected to an annular slide groove (15) on the inside, the annular slide groove (15) is fixedly connected to an on-off valve (14) on the outside, the on-off valve (14) is fixedly connected to a control box body (16) on the inside, the control box body (16) is fixedly connected to a servo motor (18) on the inside, the servo motor (18) is fixedly connected to a fourth gear (19) on the outside, the fourth gear (19) is meshingly connected to a second rack (21) on the outside, the second rack (21) is fixedly connected to a connecting rod (22) on the outside, the connecting rod (22) is fixedly connected to a transmission baffle (17) on the outside, and the transmission baffle (17) is slidably connected to the annular slide groove (15) on the outside.

2. A spirally connected syringe needle tip according to claim 1, characterized in that: The fourth gear (19) is externally meshed and connected with a first rack (20), and the first rack (20) is externally fixedly connected with a connecting rod (22).

3. A spirally connected syringe needle tip according to claim 1, characterized in that: A fourth gear (19) is rotatably connected inside the control box body (16).

4. A spirally connected syringe needle tip according to claim 1, characterized in that: The control box body (16) is fixedly connected to a transmission platform (23) inside, the transmission platform (23) is slidably connected to a first rack (20) outside, and the transmission platform (23) is slidably connected to a second rack (21) outside.

5. The spirally connected syringe needle tip according to claim 1, characterized in that: The air inlet (13) is fixedly connected to the outside of the air inlet (13) with a syringe needle tip (3).

6. A spirally connected syringe needle tip according to claim 1, characterized in that: The syringe needle seat (1) is externally rotatably connected to a fixing buckle (5), the fixing buckle (5) is externally clamped with a first gear (7), the first gear (7) is externally fixedly connected to a knob (6), the knob (6) is externally fixedly connected to a third gear (11), the third gear (11) is externally meshingly connected to a second gear (9), the second gear (9) is externally rotatably connected to a bearing (10), and the bearing (10) is externally fixedly connected to the syringe needle seat (1).

7. A spirally connected syringe needle tip according to claim 6, characterized in that: The bearing (10) is fixedly connected to a connecting pipe (8) on the outside, and the connecting pipe (8) is rotatably connected to a second gear (9) on the outside.

8. The spirally connected syringe needle tip according to claim 6, characterized in that: The second gear (9) is internally threadedly connected with a needle tip sleeve (2).

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