Puncture needle structure
By installing a vent block and a power assembly on the side wall of the puncture needle, the problem of poor liquid aspiration or injection caused by the pressure difference between the inside and outside of the bottle is solved, achieving smoothness and convenience in the liquid aspiration or injection process, and adapting to the use of bottles of different heights.
Patent Information
- Application Number
- CN202423015794.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-06
AI Technical Summary
In existing technologies, the pressure difference between the inside and outside of the vial can cause poor liquid aspiration or injection when using the puncture needle, which affects the smoothness and convenience, especially when handling large volumes of liquid.
A venting block is slidably connected to a vertically extending groove on the side wall of the puncture needle. The venting block has a gas channel and is driven to slide up and down by a power component to ensure that the lower vent is inside the bottle and the upper vent is outside the bottle, so as to achieve pressure balance inside and outside the bottle and reduce the resistance to liquid absorption or injection through gas exchange.
It achieves smoothness and convenience in the process of liquid aspiration or injection, especially large volumes of liquid can be completed in one go, improving the fluency and adaptability of the puncture needle.
Smart Images
Figure CN223759862U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical devices, specifically a puncture needle structure. Background Technology
[0002] When using existing puncture needles, it is generally necessary to pass through the cap of a reagent bottle or tube before inserting them into the bottle to draw or inject liquid. During the process of drawing or injecting liquid, the inside of the bottle remains closed, resulting in a pressure difference between the inside and outside of the bottle. This pressure difference can hinder the drawing or injection of liquid, affecting the smoothness of the process. Especially when the volume of liquid to be drawn or injected is relatively large, the drawing or injection of liquid often cannot be completed in one go, affecting the smoothness and convenience of using the puncture needle. Utility Model Content
[0003] The purpose of this invention is to provide a puncture needle structure that can solve the technical problem that the pressure difference between the inside and outside of the bottle affects the smoothness of liquid aspiration or injection during the use of the puncture needle. By using a vent block, the pressure inside and outside of the bottle is kept balanced during the liquid aspiration or injection process, thereby improving the smoothness of liquid aspiration or injection and making the use of the puncture needle smoother and more convenient.
[0004] To achieve the above objectives, this utility model employs the following technical solution:
[0005] A puncture needle structure includes a needle body with a pointed tip at the bottom and a liquid channel inside the needle body. A liquid inlet hole communicating with the liquid channel is located near the pointed tip on the needle body. A vertically extending groove is provided on the side wall of the needle body, and a venting block is slidably connected within the groove. The venting block has a gas channel inside. A fixing seat is located near the top of the side of the needle body, and a power component for driving the venting block to slide up and down is provided on the fixing seat. An upper air hole and a lower air hole communicating with the gas channel are respectively located at the top and bottom of the side of the venting block. A connecting portion is located at the top of the needle body.
[0006] Furthermore, the outer side of the cross-section of the vent block is arc-shaped, and the diameter of the arc is the same as the diameter of the cross-section of the needle body.
[0007] Furthermore, the power assembly includes a gear and a toothed plate, the toothed plate being fixed to the top of the vent block, the gear being rotatably connected to the fixed base, and the gear meshing with the toothed plate.
[0008] Furthermore, the toothed plate is slidably connected in the groove, the fixed seat is provided with a through hole, the gear is rotatably connected in the through hole, and the gear meshes with the toothed plate after passing through the through hole.
[0009] Furthermore, the liquid inlet holes are multiple and arranged in an array on the side of the needle body.
[0010] Furthermore, the connecting part is annular, and the annulus has an internal thread inside.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0012] 1. The structure of this utility model has a vertically extending groove on the side wall of the needle body. A venting block is provided in the groove, and a gas channel is provided inside the venting block. The top and bottom of the side of the venting block are respectively provided with an upper air hole and a lower air hole that communicate with the gas channel. With this structure, when the tip of the needle body passes through the cap of the bottle to draw or inject liquid, the lower air hole is located inside the bottle and the upper air hole is located outside the bottle. During the liquid drawing or injection process, the gas inside and outside the bottle will circulate inside and outside the bottle through the upper air hole, the gas channel, and the lower air hole, thereby ensuring the consistency of the gas pressure inside and outside the bottle. This makes the resistance of the liquid drawing or injection process smaller, especially when the volume of liquid is large, it can be drawn or injected in one go, which greatly improves the smoothness and convenience of using the puncture needle.
[0013] 2. The vent block is slidably connected within the groove. A fixed seat is located on the side of the needle near the top. The fixed seat has a power component that drives the vent block to slide up and down. This structure allows the vent block to slide up and down according to the height of the bottle after the needle is inserted into the bottle. This ensures that the lower vent is accurately located inside the bottle and will not come into contact with the liquid inside the bottle, while the upper vent is accurately located outside the bottle. This ensures smooth gas exchange between the inside and outside of the bottle, while preventing the liquid inside the bottle from flowing out of the vent block. This guarantees the smoothness of gas exchange between the inside and outside of the bottle and improves the adaptability to bottles of different heights. Attached Figure Description
[0014] Appendix Figure 1 This is a three-dimensional structural diagram of the present invention.
[0015] Appendix Figure 2 This is the right view of this utility model.
[0016] Appendix Figure 3 This is an appendix to this utility model. Figure 2 A cross-sectional view along the AA direction.
[0017] Appendix Figure 4 This is an appendix to this utility model. Figure 3 A magnified view of part B in the middle.
[0018] Appendix Figure 5 This is an appendix to this utility model. Figure 3 A cross-sectional view along the CC direction.
[0019] Appendix Figure 6 This is an appendix to this utility model. Figure 5 A magnified view of part D in the middle.
[0020] The labels shown in the attached diagram:
[0021] 1. Needle body; 2. Tip; 3. Liquid channel; 4. Liquid inlet; 5. Slide groove; 6. Vent block; 7. Gas channel; 8. Fixing base; 9. Upper vent; 10. Lower vent; 11. Connecting part; 12. Gear; 13. Gear plate; 14. Through hole. Detailed Implementation
[0022] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.
[0023] Reference Figure 1 and Figure 2This utility model describes a puncture needle structure. The main structure includes a needle body 1, which is a hollow, thin tube structure. The bottom of the needle body 1 has a pointed tip 2, which is generally conical, for smoothly passing through the cap of a bottle to draw or inject liquid. The needle body 1 has a liquid channel 3 inside, for drawing or injecting liquid from the bottle through the liquid channel 3. Near the pointed tip 2, the needle body 1 has an inlet hole 4 communicating with the liquid channel 3. Liquid from the bottle enters the liquid channel 3 through the inlet hole 4. The side wall of the needle body 1 has a vertically extending groove 5. The adaptive thickening allows for smooth grooving of the groove 5 on the side wall of the thickened needle body 1. This prevents the groove 5 from penetrating the side wall of the needle body 1 and connecting with the liquid channel 3, thus preventing liquid from flowing out of the groove 5 during liquid aspiration or injection. A vent block 6 is slidably connected within the groove 5. The vent block 6 covers and compensates for the groove 5, ensuring that the side of the needle body 1 remains intact during the piercing of the bottle cap, preventing plastic particles from the cap from clogging the groove 5. The vent block 6 has a gas channel 7 inside, used for the exchange of gases inside and outside the bottle. The needle body 1 has a fixed base 8 bonded or integrally formed on its side near the top. The fixed base 8 is equipped with a power component that drives the vent block 6 to slide up and down. This power component adjusts the position of the vent block 6 by driving the vent block 6 to slide up and down. The top and bottom of the side of the vent block 6 are respectively provided with an upper air hole 9 and a lower air hole 10 communicating with the gas channel 7. This structure ensures that when liquid is drawn in or injected, the lower air hole 10 is located inside the bottle, and the upper air hole 9 is located outside the bottle. Air inside and outside the bottle can circulate and exchange through the upper air hole 9, the gas channel 7, and the lower air hole 10, thereby ensuring... To ensure the consistency of air pressure inside and outside the bottle during liquid aspiration or injection, the resistance to liquid aspiration or injection is reduced, and the smoothness of the puncture needle is improved. At the same time, the position of the vent block 6 can be slid up and down according to the height of the bottle, so that the lower vent 10 is accurately located inside the bottle without contacting the liquid inside the bottle, while the upper vent 9 is also accurately located outside the bottle, thereby preventing liquid from flowing out of the gas channel 7, ensuring the smoothness of gas exchange, and avoiding waste or contamination of the liquid inside the bottle. The top of the needle body 1 is provided with a connecting part 11, which is used to connect with the tubing, improving the convenience of use with different medical devices.
[0024] Preferred, refer to Figure 5 and Figure 6The outer side of the cross-section of the vent block 6 is arc-shaped, and the diameter of the arc is the same as the diameter of the cross-section of the needle body 1. This structure allows the outer side of the vent block 6 and the outer side of the needle body 1 to form a complete arc-shaped side when the vent block 6 is in the slide groove 5. This allows the vent block 6 to accurately seal and cover the slide groove 5, so that no plastic impurities will block the slide groove 5 when the needle body 1 passes through the cap of the bottle, ensuring the smooth sliding of the vent block 6 up and down in the slide groove 5.
[0025] Preferred, refer to Figure 3 and Figure 4 The power assembly includes a gear 12 and a toothed plate 13. The toothed plate 13 is integrally formed and fixed on the top of the vent block 6. The gear 12 is rotatably connected to the fixed base 8 through a bearing. The gear 12 meshes with the toothed plate 13. With this structure, only the gear 12 on the fixed base 8 needs to be rotated to drive the toothed plate 13 and the vent block 6 to slide in the slide groove 5 under the action of meshing connection, making the sliding adjustment of the position of the vent block 6 smoother and more convenient.
[0026] Preferably, the toothed plate 13 is slidably connected in the groove 5, making the outer side of the needle body 1 smoother and preventing any protrusions from affecting the smoothness of puncturing the bottle cap. The fixing seat 8 is provided with a through hole 14, and the gear 12 is rotatably connected in the through hole 14 through a bearing. After passing through the through hole 14, the gear 12 meshes with the toothed plate 13. This structure allows most of the gear 12 to be hidden in the through hole 14 on the fixing seat 8, with only a small part located outside the through hole 14 for easy rotation by the operator. This makes the overall structure more compact, simplifies the complexity of the overall structure of the puncture needle, and makes it easier to operate and use.
[0027] Preferably, there are multiple liquid inlet holes 4 arranged in an array on the side of the needle body 1, and the corresponding tip 2 is a solid structure, which makes it stronger and easier to pierce the cap. The multiple liquid inlet holes 4 are arranged on the side of the needle body 1, which makes it less likely to be blocked, improves the efficiency of liquid inlet, and ensures the smoothness of liquid aspiration or injection.
[0028] Preferably, the connecting part 11 is annular, and the inside of the annular part is provided with internal threads. The puncture needle is connected to the pipeline through the threads, making its use with other equipment more convenient and secure.
[0029] Working Principle: This invention features a vertically extending groove 5 on the side wall of the needle body 1. A venting block 6 is located within the groove 5, and a gas channel 7 is located inside the venting block 6. The top and bottom of the venting block 6 are respectively provided with an upper vent 9 and a lower vent 10 communicating with the gas channel 7. With this structure, when the tip 2 of the needle body 1 passes through the cap of the bottle to draw or inject liquid, the lower vent 10 is located inside the bottle, and the upper vent 9 is located outside the bottle. During liquid drawing or injection, the gas inside and outside the bottle circulates through the upper vent 9, the gas channel 7, and the lower vent 10, ensuring consistent gas pressure inside and outside the bottle. This reduces resistance during liquid drawing or injection, especially when the liquid volume is large. The needle can complete aspiration or injection in one go, greatly improving the smoothness and convenience of using the puncture needle. The vent block 6 is slidably connected in the groove 5. The side of the needle body 1 is provided with a fixed seat 8 near the top. The fixed seat 8 is provided with a power component that drives the vent block 6 to slide up and down. This structure allows the vent block 6 to slide up and down according to the height of the bottle after the needle body 1 is inserted into the bottle. This ensures that the lower vent 10 is accurately located inside the bottle and will not come into contact with the liquid inside the bottle. The upper vent 9 is accurately located outside the bottle. This ensures that the liquid inside the bottle will not flow out from the vent block 6 while ensuring smooth gas exchange between the inside and outside of the bottle. This improves the adaptability to use with bottles of different heights.
Claims
1. A puncture needle structure comprising a needle body (1), the bottom of the needle body (1) being provided with a tip (2), the inside of the needle body (1) being provided with a liquid channel (3), the needle body (1) being provided with a liquid inlet hole (4) in communication with the liquid channel (3) at a position near the tip (2), characterized in that: The side wall of the needle body (1) is provided with a vertically extending sliding groove (5), a ventilation block (6) is slidably connected in the sliding groove (5), the ventilation block (6) is internally provided with a gas passage (7), the side of the needle body (1) is provided with a fixed seat (8) near the top, the fixed seat (8) is provided with a power assembly for driving the ventilation block (6) to slide up and down, the top and bottom of the side of the ventilation block (6) are respectively provided with an upper air hole (9) and a lower air hole (10) which are in communication with the gas passage (7), and the top of the needle body (1) is provided with a connecting portion (11). 2. The puncture needle structure of claim 1, wherein: The outer side of the cross section of the ventilation block (6) is arc-shaped, and the diameter of the arc-shaped is the same as the diameter of the cross section of the needle body (1).
3. The puncture needle structure of claim 1, wherein: The power assembly comprises a gear (12) and a toothed plate (13), the toothed plate (13) is fixed on the top of the ventilation block (6), and the gear (12) is rotatably connected to the fixed seat (8).
4. The puncture needle structure of claim 3, wherein: The toothed plate (13) is slidably connected in the sliding groove (5), the fixed seat (8) is provided with a through hole (14), the gear (12) is rotatably connected in the through hole (14), and the gear (12) is engaged with the toothed plate (13) after penetrating through the through hole (14).
5. The puncture needle structure of claim 1, wherein: The liquid inlet holes (4) are multiple and arrayed on the side of the needle body (1).
6. The puncture needle structure of claim 1, wherein: The connecting portion (11) is annular, and the inner side of the annular is internally provided with an internal thread.