Syringe

Abstract

The invention relates to the field of medical equipment, and discloses an injector which comprises a barrel and a piston rod, a groove is formed in the top end of the barrel, a first gear is arranged in the groove, the outer wall of the first gear is in meshed connection with a second gear, the second gear is connected with a transmission rod, and the other end of the transmission rod is connected with a driving structure. The driving structure is arranged at the end, away from the end of the piston rod, of the barrel and drives the first gear to rotate around the axis of the barrel through the second gear. The inner wall of the first gear is in threaded connection with the piston rod to drive the piston rod to move in the barrel; the second gear can be driven to rotate through the driving structure, and then the first gear is driven to rotate, so that the piston rod is driven to move in the barrel, injection is completed, the piston rod does not need to be directly pushed, the injector is more convenient and faster to use, more labor is saved, and the injection efficiency is higher; and the position of the injector in the injection process is more stable, and the injection safety is higher.

Description

Technical Field

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

[0002] In the medical field, syringes are commonly used medical devices. There are various types of syringes, and different syringes are adopted according to different medical operation requirements. During the operation, after the doctor inserts the needle into the patient's body, it is often necessary to retract the piston to ensure that the needle is in the correct position before injection. Sometimes this needs to be repeated multiple times, that is, retracting and injecting while retracting. One hand repeatedly pushes and pulls the piston rod at the tail of the syringe, increasing the difficulty of fixing the front-end needle. Sometimes the other hand also needs to hold other instruments and cannot assist in fixing the front-end needle. Often, the cooperation of a second medical staff is required to complete the injection operation, which is time-consuming and laborious. It is necessary to improve the existing syringe to shorten the hand-held distance (as far forward as possible) and the moving distance of the fingers during operation, and be able to switch between injection and retraction at any time, facilitating single-handed operation. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: how to move the operating hand from the tail end of the syringe to the head end, increase the hand-held stability, and improve the injection efficiency. To solve the above technical problem, the present invention provides a syringe, including a barrel and a piston rod. A groove is provided at the top end of the barrel, and a first gear is provided in the groove. The outer wall of the first gear is meshed and connected with a second gear. The second gear is connected with a transmission rod, and the other end of the transmission rod is connected with a driving structure. The driving structure is arranged at one end of the barrel far from the end of the piston rod. The driving structure drives the first gear to rotate around the axis of the barrel through the second gear; the inner wall of the first gear is threadedly connected with the piston rod to drive the piston rod to move in the barrel.

[0004] Preferably, the barrel includes a main body and a cover body. The cover body is detachably connected with the main body, and the groove is formed between the main body and the cover body;

[0005] The cover body is provided with a first mounting seat, and the second gear is rotatably connected to the first mounting seat.

[0006] Preferably, the driving structure includes a first accommodating cavity and a second accommodating cavity provided on the side wall of the main body. A driving motor is detachably provided in the first accommodating cavity, a button battery is provided in the second accommodating cavity, and the output end of the driving motor is fixedly connected with the transmission rod.

[0007] Preferably, the driving structure further includes a control panel, and the control panel is arranged at one end of the main body far from the cover body. The control panel is electrically connected with the driving motor.

[0008] Preferably, the driving structure includes an engaged third gear and a transmission disk, the transmission disk is rotatably connected to the main body, the third gear is fixedly connected to the transmission rod, and a second mounting seat is connected to the end of the transmission rod.

[0009] Preferably, the main body is provided with a base, the base is provided with a third accommodation cavity for accommodating the transmission disk. The side wall of the transmission disk is circumferentially provided with protrusions, the top surface of the transmission disk is provided with scale lines, and the outer wall of the top plate of the accommodation cavity is provided with indicating lines corresponding to the scale lines.

[0010] Preferably, the driving structure includes a first bevel gear, a second bevel gear and a driving wheel. The first bevel gear is fixedly connected to the transmission rod, the second bevel gear is engaged with the first bevel gear, and the driving wheel is coaxially and fixedly connected to the second bevel gear.

[0011] Preferably, a cover is provided on the top of the main body, and a sealing ring is provided between the cover and the first gear.

[0012] Compared with the prior art, the syringe provided in the embodiment of the present invention has the following beneficial effects:

[0013] In the present invention, when medical staff need to perform an injection by inserting the needle into the patient's body, the driving structure located at the end of the barrel near the needle can be used to drive the second gear to rotate, thereby driving the first gear to rotate, and then driving the piston rod to move in the barrel, so as to complete the injection. There is no need to push the piston rod from the end of the syringe, making the use of the syringe more convenient, faster, more labor-saving, and the injection efficiency is also higher. It also makes the position of the syringe more stable during the injection process and the injection safety is higher. Description of the Drawings

[0014] Figure 1 is a three-dimensional view of Embodiment 1 of the present invention;

[0015] Figure 2 is the Figure 1 partial structural schematic diagram in;

[0016] Figure 3 is a three-dimensional view of Embodiment 2 of the present invention;

[0017] Figure 4 is the Figure 2 partial structural schematic diagram in;

[0018] Figure 5 is a three-dimensional view of Embodiment 3 of the present invention;

[0019] Figure 6It is of the present invention Figure 3 The partial structural schematic diagram in

[0020] In the figure: 1, cylinder body; 11, groove; 12, first gear; 13, second gear; 14, transmission rod; 141, second mounting seat; 15, cover body; 151, first mounting seat; 16, main body; 161, sealing cover

[0021] 2, piston rod

[0022] 3, driving structure; 31, first accommodating cavity; 32, second accommodating cavity; 33, driving motor; 34, control panel; 35, third gear; 36, transmission gear disc; 361, convex strip; 362, third accommodating cavity; 363, indicating line; 37, first bevel gear; 38, second bevel gear; 39, driving wheel Specific embodiments

[0023] The following will further describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention

[0024] As Figure 1 and Figure 2 shown, a preferred embodiment of the present invention provides a syringe, including a cylinder body 1 and a piston rod 2. A groove 11 is provided at the top end of the cylinder body 1. A first gear 12 is provided in the groove 11. The outer wall of the first gear 12 is meshed and connected with a second gear 13. The second gear 13 is connected with a transmission rod 14. The other end of the transmission rod 14 is connected with a driving structure 3. The driving structure 3 is arranged at one end of the cylinder body 1 far from the end of the piston rod 2. The driving structure 3 drives the first gear 12 to rotate around the axis of the cylinder body 1 through the second gear 13; The inner wall of the first gear 12 is threadedly connected with the piston rod 2 to drive the piston rod 2 to move in the cylinder body 1

[0025] Specifically, due to the excessive length of some syringes, it is very inconvenient to push the piston rod 2 for injection after inserting the needle into the patient's body. It is difficult to operate and often requires using another hand for the injection work or relying on the cooperation of other medical staff. This is not only time-consuming and laborious with low efficiency, but also prone to fluctuations and deviations in the position of the syringe, resulting in a decrease in injection comfort and safety. In this embodiment, when injection is required, the medical staff no longer directly push the piston rod 2, but can drive the second gear 13 to rotate through the driving structure 3 at the bottom of the barrel 1, and then drive the first gear 12 to rotate, thereby driving the piston rod 2 to move up and down in the barrel 1 to complete the injection work and the aspiration work. During the use of traditional syringes, after the medical staff complete the needle insertion, they need to change their gestures, use another hand, or request the assistance of other medical staff to push the piston rod 2. The entire injection process is very troublesome, with low efficiency and lack of safety. In this embodiment, the component directly driven by the medical staff is arranged at one end of the barrel 1 close to the needle. After the needle insertion action is completed, the hand of the medical staff can remain at the bottom of the syringe. On the one hand, it can better stabilize the position of the syringe, and on the other hand, it can more conveniently and quickly drive the first gear 12 to rotate through the driving structure 3 and drive the piston rod 2 to move to complete the injection work. The injection work efficiency is higher, more labor-saving, and the syringe is more stable and safe during the injection process.

[0026] Furthermore, in this structure, since the inner wall of the first gear 12 is threadedly connected to the outer wall of the piston rod 2 for driving, during the actual driving process, the piston rod 2 avoids direct contact with other external structural devices at the driving structure 3, which can reduce the risk of bringing external viruses into the barrel 1 and improve the safety of drug injection.

[0027] In some embodiments, the barrel 1 includes a main body 16 and a cover 15. The cover 15 is detachably connected to the main body 16, and a groove 11 is formed between the main body 16 and the cover 15;

[0028] The cover 15 is provided with a first mounting seat 151, and the second gear 13 is rotatably connected to the first mounting seat 151.

[0029] Specifically, during the actual production and assembly process, the cylinder body 1 is divided into two parts, namely the main body 16 and the cover body 15, for production. When all the components are produced and need to be assembled, first, the first gear 12 is assembled with the piston rod 2. Subsequently, a piston head is installed at the bottom end of the piston rod 2, and the piston head is passed through the cover body 15 and placed inside the main body 16. Preferably, the cover body 15 and the main body 16 are assembled. In this embodiment, a snap structure is adopted between the cover body 15 and the main body 16 to achieve detachable fixed connection, which is convenient for subsequent recycling and disinfection treatment of each component of the syringe. In some other embodiments, the cover body 15 and the main body 16 are non-detachable after assembly, and the connection between the cover body 15 and the main body 16 is more stable and reliable in this structure.

[0030] In addition, a first mounting seat 151 is provided on the cover body 15, and the first mounting seat 151 is rotatably connected to the second gear 13. The position and movement mode of the second gear 13 can be restricted through the first mounting seat 151, so that the second gear 13 can stably mesh with the first gear 12 and drive the first gear 12 to rotate.

[0031] In the first embodiment, the driving structure 3 includes a first accommodating cavity 31 and a second accommodating cavity 32 provided on the side wall of the main body 16. A driving motor 33 is detachably arranged in the first accommodating cavity 31, and a button battery is arranged in the second accommodating cavity 32. The output end of the driving motor 33 is fixedly connected to the transmission rod 14.

[0032] Furthermore, the driving structure 3 further includes a control panel 34. The control panel 34 is arranged at one end of the main body 16 away from the cover body 15, and the control panel 34 is electrically connected to the driving motor 33.

[0033] Specifically, in this embodiment, the driving structure 3 includes two parts, namely a motor and a control panel 34. The control panel 34 is arranged at one end of the main body 16 away from the cover 15, which is convenient for medical staff to operate after injection, eliminating the trouble of pressing the top of the piston rod 2. The driving motor 33 can be arranged at one end of the main body 16 close to the cover 15 according to the transmission requirements, so as to reduce the space occupied by the driving structure 3. In addition, in this embodiment, the driving motor 33 is detachably arranged in the first accommodating cavity 31. When the syringe needs to be processed after use, the driving motor 33 can be conveniently disassembled and recycled. The output end of the driving motor 33 is fixedly connected to the transmission rod 14 through a nested structure, and then fixedly connected to the rotating shaft of the second gear 13, so as to drive the second gear 13 to rotate. Of course, it can be understood that in some other embodiments, the output end of the driving motor 33 is not directly connected to the transmission rod 14, but is provided with a multi-stage speed reduction driving structure 3, so as to adjust the rotation speed of the second gear 13 to meet the requirements of the injection speed of the piston rod 2. In this type of embodiment, the output end of the driving motor 33 is also connected to the transmission rod 14, and it should also fall within the protection scope of this embodiment.

[0034] In the second embodiment, the driving structure 3 includes a meshing third gear 35 and a transmission gear disk 36. The transmission gear disk 36 is rotatably connected to the main body 16, the third gear 35 is fixedly connected to the transmission rod 14, and a second mounting seat 141 is connected to the end of the transmission rod 14.

[0035] Furthermore, the main body 16 is provided with a base, and the base is provided with a third accommodating cavity 362 for accommodating the transmission gear disk 36. The side wall of the transmission gear disk 36 is circumferentially provided with convex strips 361, the top surface of the transmission gear disk 36 is provided with scale lines, and the outer wall of the top plate of the accommodating cavity is provided with indicating lines 363 corresponding to the scale lines.

[0036] Specifically, in this embodiment, the driving structure 3 is changed to be manually operated by medical staff. Compared with the driving by the driving motor 33, the overall production cost is lower, and it is also more convenient for medical staff to operate and control. In this embodiment, when it is necessary to drive the piston rod 2 to move to complete the aspiration work or injection work, the medical staff can slowly push the transmission gear disk 36 to rotate with the thumb of the hand holding the syringe, thereby driving the third gear 35 to rotate, and then driving the second gear 13 and the first gear 12 to rotate, and finally driving the piston rod 2 to move along the axis of the cylinder 1 in the cylinder 1. During the above operation process, the medical staff can hold the syringe with one hand and drive the first gear 12 located at the upper end of the cylinder 1 to rotate by pushing the transmission gear disk 36 at the bottom of the syringe, and then drive the piston rod 2 to move to complete the injection work. The whole injection operation is simpler, more labor-saving and reliable.

[0037] In addition, the provision of the convex strip 361 can increase the friction force on the side wall of the transmission gear disk 36, enabling medical staff to drive the rotation of the transmission gear disk 36 more labor - saving. The provision of the third accommodation cavity 362 can protect the transmission gear disk 36 and the third gear 35, making the transmission between the third gear 35 and the transmission gear disk 36 more stable and reliable. The provision of the indicator line and the scale line can provide an indication for medical staff, facilitating medical staff to accurately control the injection dosage of the drug and ensuring the safety of drug injection.

[0038] In the third embodiment, the driving structure 3 includes a first bevel gear 37, a second bevel gear 38, and a driving wheel 39. The first bevel gear 37 is fixedly connected to the transmission rod 14, the second bevel gear 38 meshes with the first bevel gear 37, and the driving wheel 39 is coaxially and fixedly connected to the second bevel gear 38.

[0039] Specifically, in this embodiment, the driving structure 3 is divided into a first bevel gear 37 and a second bevel gear 38. The meshing of the two bevel gears is used to adjust and change the transmission direction. Finally, the driving wheel 39 coaxial with the second bevel gear 38 is used to drive the rotation of the second bevel gear 38, thereby driving the rotation of the first bevel gear 37, the second gear 13, and the first gear 12, and finally realizing the driving of the piston rod 2.

[0040] In fact, in this embodiment, the first bevel gear 37 can be equivalent to the third gear 35 in the second embodiment, and the second bevel gear 38 is equivalent to the transmission gear disk 36 in the second embodiment.

[0041] In some embodiments, a cover 161 is provided on the top of the main body 16, and a sealing ring is provided between the cover 161 and the first gear 12. Specifically, the provision of the sealing ring can ensure the safety of the internal environment of the main body 16 during the rotation of the first gear 12, preventing external bacteria and the like from entering the interior of the main body 16 through the gap between the first gear 12 and the main body 16 and contaminating the liquid medicine inside the main body 16.

[0042] In summary, the embodiment of the present invention provides a syringe, which can drive the rotation of the second gear 13 and the first gear 12 located in the upper part of the cylinder body 1 through the driving structure 3 provided at the bottom of the cylinder body 1, and then drive the piston rod 2 to move in the cylinder body 1 to complete the aspiration and injection of the liquid medicine. This enables medical staff not to repeatedly move their hands back and forth to complete the operation, and can perform drug injection more conveniently, quickly, and labor - saving. The stability and safety of the syringe during the injection process are also better.

[0043] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A syringe comprising a barrel and a piston rod, characterized in that: A groove is provided at the top of the cylinder, a first gear is provided in the groove, the outer wall of the first gear is meshedly connected with a second gear, the second gear is connected with a transmission rod, the other end of the transmission rod is connected with a driving structure, and the driving structure drives the first gear to rotate around the axis of the cylinder through the second gear; the inner wall of the first gear is threadedly connected to the piston rod to drive the piston rod to move within the cylinder.

2. The syringe according to claim 1, characterized in that The cylinder comprises a main body and a cover body, the cover body is detachably connected to the main body, and the groove is formed between the main body and the cover body; The cover body is provided with a first mounting seat, and the first mounting seat is rotatably connected to the second gear.

3. The syringe according to claim 2, characterized in that The driving structure includes a first accommodating cavity and a second accommodating cavity arranged on the side wall of the main body, the first accommodating cavity is detachably provided with a driving motor, the second accommodating cavity is provided with a button battery, and the output end of the driving motor is fixedly connected to the transmission rod.

4. The syringe according to claim 3, characterized in that The driving structure further comprises a control panel, which is arranged at one end of the main body away from the cover body, and the control panel is electrically connected to the driving motor.

5. The syringe according to claim 2, characterized in that The driving structure comprises a meshing third gear and a transmission toothed disc, the transmission toothed disc is rotationally connected to the main body, the third gear is fixedly connected to the transmission rod, and the end of the transmission rod is connected to a second mounting seat.

6. The syringe according to claim 5, characterized in that The main body is provided with a base, and the base is provided with a third accommodating cavity, and the third accommodating cavity is used to accommodate the transmission gear disc, the side wall of the transmission gear disc is evenly distributed with convex strips on the circumference, the top surface of the transmission gear disc is provided with scale lines, and the outer wall of the top plate of the accommodating cavity is provided with indicator lines corresponding to the scale lines.

7. The syringe according to claim 2, characterized in that The driving structure includes a first bevel gear, a second bevel gear and a driving wheel, the first bevel gear is fixedly connected to the transmission rod, the second bevel gear is meshed with the first bevel gear, and the driving wheel is coaxially fixedly connected to the second bevel gear.

8. The syringe according to claim 2, characterized in that A sealing cover is arranged on the top of the main body, and a sealing ring is arranged between the sealing cover and the first gear.

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