Adjustable lancing needle
The adjustable bloodletting needle design solves the problem of fixed specifications in traditional bloodletting needles, enabling flexible adjustment of needle thickness, improving blood collection efficiency and patient experience, and reducing medical costs.
Patent Information
- Application Number
- CN202510956000.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-10
- Publication Date
- 2025-11-07
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional bloodletting needles have fixed specifications, which makes it difficult to meet the diverse medical needs of different individuals, affecting blood collection results and patient experience, and increasing the cost of medical consumables management for medical institutions.
An adjustable lancet was designed, which achieves 0.1mm precision adjustment through the fine thread pair of the threaded connecting tube and the rotating tube. Combined with the elastic friction plate and silicone sealing ring, it ensures accurate fitting and safety of the needle tip.
It enables flexible adjustment of needle thickness, improves the accuracy and safety of blood collection operations, reduces the risk of tissue damage and infection, and reduces medical costs.
Smart Images
Figure CN120899244A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of medical devices, more particularly, the present application relates to an adjustable lancet needle. BACKGROUND
[0002] As an important part of traditional Chinese medicine minimally invasive technology, the clinical need to select different specifications of needle according to the patient's age, blood vessel thickness, puncture site, the traditional lancet needle generally adopts fixed aperture design, typical structure includes stainless steel needle core and plastic sleeve, aperture specification is usually divided into 20G-26G, such needle in the actual application needs to rely on medical staff to select specifications according to experience, for example, adult venous blood is usually used 22G needle, and children fingertip blood needs 26G thin needle.
[0003] Traditional needle needs to reserve 20G-26G and other specifications, which increases the cost of medical institution consumable management and inventory pressure, the traditional lancet needle is fixed in thickness, which is difficult to meet the diversified medical needs, the skin thickness, blood vessel depth and blood viscosity of different individuals are different, the fixed thickness needle cannot be accurately matched, which affects the blood sampling effect and patient experience, in medical practice, for children, the elderly or people with thin skin, thin needle can reduce pain and tissue damage, while for obese people or people with deep blood vessels, thick needle is beneficial to successful blood sampling, which improves the efficiency and success rate of blood sampling. SUMMARY
[0004] In order to overcome the above-mentioned defects of the prior art, the present application provides an adjustable lancet needle to solve the problems raised in the background art.
[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: the adjustable lancet needle comprises a lancet needle core, an outer sleeve is sleeved outside the lancet needle core, and an adjustable mechanism is arranged between the lancet needle core and the outer sleeve.
[0006] The adjustable mechanism comprises a threaded connection pipe, the threaded connection pipe is installed at the top of the lancet needle core, a rotating pipe is arranged outside the threaded connection pipe, a fixed pipe is fixedly connected at the top of the rotating pipe, a luer connector is fixedly installed at the top of the fixed pipe, rotating handles are fixedly connected on both sides of the rotating pipe, a mark scale is arranged on the outer surface of the rotating pipe, a first silica gel sealing ring is arranged between the bottom end of the lancet needle core and the outer sleeve, and a locking mechanism is arranged on one side of the outer sleeve.
[0007] Preferably, the locking mechanism comprises a fixed shell fixed on one side of the outer sleeve, a threaded hole is formed on one side surface of the fixed shell, and a threaded column is threadedly connected to the inside of the fixed shell, and one end of the threaded column is provided with a moving block.
[0008] Preferably, the moving block is slidingly connected between the outer sleeve and the fixed shell, a threaded groove is formed on one side surface of the moving block, the threaded column is threadedly connected with the threaded groove, one end of the moving block is fixedly connected with an elastic friction plate, and the other end of the moving block is fixedly connected with a knob.
[0009] Preferably, the elastic friction plate is arc-shaped in cross-sectional shape, a plurality of transverse fine grooves are uniformly formed on one side surface of the elastic friction plate, the elastic friction plate is made of medical-grade silicone rubber, the hardness thereof is Shore A 50±5, the inner diameter of the elastic friction plate is 0.1-0.2mm smaller than the outer diameter of the lancet core, and the elastic friction plate is in interference fit with the lancet core.
[0010] Preferably, limit sliding grooves are formed on the inner wall surfaces of the outer sleeve and the rotating tube, and fixed sliding rings are fixedly sleeved on the outer wall surfaces of the fixed tube and the rotating tube, and the limit sliding grooves are slidingly connected with the fixed sliding rings.
[0011] Preferably, the first silica gel sealing ring is fixedly connected between the outer sleeve and the lancet core, and is slidingly connected between the first silica gel sealing ring and the lancet core, the first silica gel sealing ring is embedded in the gap between the lancet core and the outer sleeve, has a thickness of 0.3-0.5mm, and forms a dynamic sealing structure.
[0012] Preferably, a threaded tube is fixedly connected to the bottom of the threaded connecting tube, threads are formed on the inner wall surface of the lancet core, the threaded tube is threadedly connected with the lancet core, a second silica gel sealing ring is sleeved on the outer side of the threaded tube, the second silica gel sealing ring is arranged between the lancet core and the threaded tube, a sliding groove is formed on one side surface of the outer sleeve, a sliding block is slidingly connected in the sliding groove, and one end of the sliding block is fixedly connected with the threaded connecting tube.
[0013] Preferably, the lancet core is made of medical-grade stainless steel, the needle tip of the lancet core is a bevel cutting structure, the bevel angle is 15°-25°, the outer surface of the needle tip is coated with a medical-grade polytetrafluoroethylene coating with a thickness of 0.5-1μm, the friction coefficient is ≤0.05, the outer sleeve is made of transparent medical-grade polypropylene material, the light transmittance is not less than 90%, the material surface hardness reaches Rockwell hardness R95-105, and the outer sleeve can be repeatedly used after high-temperature and high-pressure sterilization.
[0014] Preferably, one side of the identification scale is marked with a G number scale identification, and each identification scale corresponds to a 0.5G aperture change.
[0015] Preferably, the external thread of the threaded connection pipe and the internal thread of the rotating pipe form a fine thread pair, the pitch is 0.5-0.7mm, the thread angle is smaller than the equivalent friction angle to achieve self-locking, and the lancet core retracts when the rotating pipe rotates clockwise and extends when it rotates counterclockwise.
[0016] Technical effects and advantages of the present application:
[0017] 1. The fine thread pair of the rotating pipe and the threaded connection pipe realizes 0.1mm level precision adjustment, each grid identification scale corresponds to 0.5G aperture change, and continuous adjustment can be realized within the range to meet the precise control of different scenes, which is suitable for scenes with different skin thicknesses, precisely adapts to different blood vessel thicknesses of children and adults, the self-locking design with a thread angle smaller than the equivalent friction angle, the interference clamping of the elastic friction plate, double locking to prevent the needle tip from shifting in the puncture vibration, the elastic friction plate with the interference fit of the silicon rubber and the needle core, and the increased friction area of the transverse fine groove to improve the locking effect of the lancet core;
[0018] 2. The first silica gel sealing ring dynamically fits the gap between the lancet core and the outer sleeve, and the second silica gel sealing ring forms a static seal at the threaded connection to prevent liquid from seeping into the adjustment mechanism, the 15°-25° bevel of the needle tip cooperates with the 0.5-1μm polytetrafluoroethylene coating to reduce the puncture resistance and keep it sharp, avoid scratching the outer sleeve during extension and contraction, reduce the tissue damage area, and the coating improves the bacteriostatic rate and reduces the risk of infection at the puncture site;
[0019] 3. The material hardness of the outer sleeve is R95-105, which can withstand high temperature and high pressure disinfection, still maintains structural strength and transparency after repeated use, reduces medical costs, meets environmental protection needs, and through the threaded connection of the threaded pipe and the lancet core, the lancet core can be easily disassembled and replaced, the limiting sliding groove on the inner wall of the rotating pipe cooperates with the fixed sliding ring on the outer wall of the fixed pipe to strictly limit the axial movement of the rotating pipe, ensure that the rotating action is uniquely converted into the linear extension of the lancet core, and avoid transmission errors. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is a schematic diagram of the overall structure of the present application.
[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the present application.
[0022] Figure 3 It is a schematic diagram of the rear view structure of the present application.
[0023] Figure 4 It is a schematic diagram of the structure of the rotating pipe and the luer connector connection of the present application.
[0024] Figure 5 It is a schematic diagram of the disassembly structure of the threaded connection pipe and the lancet core of the present application.
[0025] Figure 6 This is a schematic diagram of the locking mechanism of the present invention.
[0026] Figure 7 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.
[0027] Figure 8 For the present invention Figure 2 Enlarged structural diagram at point B.
[0028] The attached figures are labeled as follows: 1. Penetrating needle core; 2. Outer sleeve; 3. Threaded connecting tube; 4. Rotating tube; 5. Fixed tube; 6. Luer connector; 7. Rotating handle; 8. Marking scale; 9. First silicone sealing ring; 10. Fixed shell; 11. Threaded hole; 12. Threaded post; 13. Moving block; 14. Threaded groove; 15. Elastic friction plate; 16. Knob; 17. Transverse groove; 18. Limiting slide groove; 19. Fixed slip ring; 20. Threaded tube; 21. Second silicone sealing ring. Detailed Implementation
[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0030] As attached Figures 1-8 The adjustable bloodletting needle shown includes a bloodletting needle core 1, an outer sleeve 2 is sleeved on the outside of the bloodletting needle core 1, and an adjustable mechanism is provided between the bloodletting needle core 1 and the outer sleeve 2.
[0031] The adjustable mechanism includes a threaded connecting tube 3, which is installed on the top of the lancet core 1. A rotating tube 4 is provided on the outside of the threaded connecting tube 3. A fixed tube 5 is fixedly connected to the top of the rotating tube 4. A Luer connector 6 is fixedly installed on the top of the fixed tube 5. Rotating handles 7 are fixedly connected to both sides of the rotating tube 4. Marking scales 8 are provided on the outer surface of the rotating tube 4. A first silicone sealing ring 9 is provided between the lancet core 1 and the bottom end of the outer sleeve 2. A locking mechanism is provided on one side of the outer sleeve 2.
[0032] As attached Figure 1 , 2As shown in Figures 3, 4, 6, and 7, the locking mechanism includes a fixed housing 10, which is fixed to one side of the outer sleeve 2. A threaded hole 11 is provided on one side surface of the fixed housing 10. A threaded post 12 is threadedly connected inside the fixed housing 10. A moving block 13 is provided at one end of the threaded post 12. The cooperation between the threaded post 12 and the threaded hole 11 provides a transmission basis for the subsequent stable locking of the blood-piercing needle core.
[0033] As attached Figure 2 , 7 As shown, the movable block 13 is slidably connected to the outer sleeve 2 and the fixed shell 10. A threaded groove 14 is provided on one side surface of the movable block 13. The threaded post 12 is threadedly connected to the threaded groove 14. An elastic friction plate 15 is fixedly connected to one end of the movable block 13, and a knob 16 is fixedly connected to the other end of the movable block 13. The sliding connection ensures that the elastic friction plate 15 moves smoothly, the threaded connection enables precise control, and the knob 16 is convenient for manual operation by the user, so as to accurately control the locking force of the elastic friction plate on the lancet core 1.
[0034] As attached Figure 2 , 6 As shown in Figure 7, the cross-sectional shape of the elastic friction plate 15 is arc-shaped. Multiple transverse grooves 17 are evenly distributed on one side surface of the elastic friction plate 15. The elastic friction plate 15 is made of medical-grade silicone rubber with a Shore A hardness of 50±5. The inner diameter of the elastic friction plate 15 is 0.1-0.2 mm smaller than the outer diameter of the lancet core 1. The elastic friction plate 15 and the lancet core 1 are interference-fitted. The arc-shaped design fits the surface of the lancet core 1. The transverse grooves increase the friction area. The medical-grade silicone rubber and the interference fit enable the elastic friction plate 15 to firmly clamp the lancet core 1 and prevent displacement during puncture.
[0035] As attached Figure 2 , 8 As shown, both the outer sleeve 2 and the inner wall surface of the rotating tube 4 are provided with limiting grooves 18, and both the outer wall of the fixed tube 5 and the outer wall of the rotating tube 4 are fixedly fitted with fixed slip rings 19. The limiting grooves 18 and the fixed slip rings 19 are slidably connected to ensure that the rotating tube 4 can only rotate and cannot move axially, thereby accurately converting the rotational motion into the linear motion of the blood-piercing needle core 1, avoiding transmission errors and improving adjustment accuracy.
[0036] As attached Figure 2 , 3 As shown in Figure 7, the first silicone sealing ring 9 is fixedly connected to the outer sleeve 2, and the first silicone sealing ring 9 is slidably connected to the lancet core 1. The first silicone sealing ring 9 is embedded in the gap between the lancet core 1 and the outer sleeve 2, with a thickness of 0.3-0.5mm, forming a dynamic sealing structure. This structure can effectively prevent blood from seeping out from the gap between the lancet core 1 and the outer sleeve 2 during the extension and retraction of the lancet core 1, ensuring the hygiene and safety of the operation process and reducing the risk of infection.
[0037] As shown in the accompanying drawings Figure 2 , 5 , the bottom of the threaded connection pipe 3 is fixedly connected with a threaded pipe 20, the inner wall surface of the lancet core 1 is provided with threads, the threaded pipe 20 is threadedly connected with the lancet core 1, the outer side of the threaded pipe 20 is sleeved with a second silica gel sealing ring 21, the second silica gel sealing ring 21 is arranged between the lancet core 1 and the threaded pipe 20, the threaded connection facilitates the disassembly and replacement of the lancet core, reduces the use cost, the second silica gel sealing ring 21 forms a static seal to prevent liquid from seeping into the threaded connection part, protect the internal structure, prolong the service life of the instrument, the outer sleeve 2 is provided with a sliding groove 22 on one side surface, a sliding block 23 is slidably connected in the sliding groove 22, one end of the sliding block 23 is fixedly connected with the threaded connection pipe 3, which plays a limiting role to avoid the threaded connection pipe 3 and the lancet core 1 from rotating with the rotating pipe 4.
[0038] As shown in the accompanying drawings Figure 1 , 2 , 3, 4, 5, 7, the lancet core 1 is made of medical-grade stainless steel, the needle tip of the lancet core 1 is a bevel cutting structure, the bevel angle is 15°-25°, and the outer surface of the needle tip is coated with a medical-grade polytetrafluoroethylene coating with a thickness of 0.5-1 μm, the friction coefficient is ≤0.05, the outer sleeve 2 is made of transparent medical-grade polypropylene material, the light transmittance is not less than 90%, and the material surface hardness reaches Rockwell hardness R95-105, the outer sleeve 2 can be repeatedly used after high-temperature and high-pressure disinfection, and the medical-grade stainless steel ensures the strength and corrosion resistance of the lancet core 1, the reasonable bevel angle and low-friction coefficient coating can significantly reduce the puncture resistance, reduce tissue damage, and improve the puncture efficiency and patient comfort.
[0039] As shown in the accompanying drawings Figure 1 , 4 , one side of the identification scale 8 is marked with G number scale identification, and each identification scale 8 corresponds to a 0.5G aperture change, the quantitative identification scale 8 allows users to intuitively read the current exposure length of the lancet core 1 corresponding to the puncture depth, without the need for additional measurement tools, improving the accuracy and convenience of operation.
[0040] As shown in the accompanying drawings Figure 2 , 5 , the external threads of the threaded connection pipe 3 and the internal threads of the rotating pipe 4 form a fine thread pair, the pitch is 0.5-0.7mm, the thread rise angle is less than the equivalent friction angle to realize self-locking, the lancet core 1 retracts when the rotating pipe 4 rotates clockwise, and the lancet core 1 extends when the rotating pipe 4 rotates counterclockwise, the fine thread pair realizes 0.1mm level precision adjustment to meet the precise control requirements of different scenes, the self-locking feature cooperates with the locking mechanism to double protect the lancet core 1 from displacement in puncture vibration, ensuring safety in use.
[0041] The working principle of the application is as follows: the rotating pipe 4 is matched with the threaded connecting pipe 3 through a threaded pair, when the rotating handle 7 is rotated, the rotating pipe 4 moves along the threaded axial direction, the rotating handle 7 drives the rotating pipe 4 to rotate, the external thread of the threaded connecting pipe 3 and the internal thread of the rotating pipe 4 form a fine thread pair, which provides fine adjustment capability, the limiting sliding groove 18 on the inner wall of the rotating pipe 4 is matched with the fixed sliding ring 19 on the outer wall of the fixed pipe 5, which ensures that the rotating pipe 4 can only rotate and cannot move axially, and converts the rotating motion into the linear motion of the lancet core 1, when rotating clockwise, the lancet core 1 is retracted into the outer sleeve 2, and the exposed length is reduced; when rotating counterclockwise, the lancet core 1 is extended, and the exposed length is increased, thereby driving the lancet core 1 to extend and retract relative to the outer sleeve 2, and adjusting the exposed length of the lancet core 1 is realized.
[0042] After adjusting to the target position, the knob 16 of the rotating locking mechanism is rotated, the threaded column 12 is rotated in the threaded hole 11 of the fixed shell 10, the threaded column 12 drives the moving block 13 to slide along the fixed shell 10, and the elastic friction plate 15 is pressed against the lancet core 1, the elastic friction plate 15 is made of medical silicone rubber with a Shore A value of 50±5, the inner diameter is 0.1-0.2mm smaller than the outer diameter of the lancet core 1, the interference fit generates friction, the transverse fine groove 17 increases the friction coefficient, and reliable locking is realized.
[0043] The first silica gel sealing ring 9 is embedded in the gap between the lancet core 1 and the outer sleeve 2, dynamic sealing is formed, blood leakage is prevented, and the sliding of the lancet core 1 is allowed, the second silica gel sealing ring 21 provides static sealing between the threaded pipe 20 and the lancet core 1, liquid is prevented from seeping into the threaded connecting part, the needle tip of the lancet core 1 has an inclined surface with an angle of 15°-25°, is coated with 0.5-1um medical polytetrafluoroethylene coating, the puncture resistance and tissue damage are reduced, the identification scale 8 on the surface of the rotating pipe 4 corresponds to G, the aperture changes by 0.5G per grid, the user can directly read the puncture depth corresponding to the exposed length of the lancet core 1, the self-locking property of the fine thread pair ensures that the position after adjustment is stable and will not change due to vibration or accidental touch, the outer sleeve 2 is made of transparent medical polypropylene, the position of the internal lancet core 1 can be observed, the surface hardness is R95-105, can withstand high temperature and high pressure disinfection, and supports repeated use.
[0044] Finally, it should be pointed out that: first, in the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between the two elements, or direct connection, "up", "down", "left", "right" and the like are only used to represent the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;
[0045] Secondly: the embodiment of the present application discloses only the structure related to the embodiment of the present application, other structures can refer to the general design, and in the case of no conflict, the same embodiment and different embodiments of the present application can be combined with each other;
[0046] Finally: the above only for the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. An adjustable lancet head comprising a lancet core (1), characterized in that: The lancet core (1) is sleeved with an outer sleeve (2), and an adjustable mechanism is arranged between the lancet core (1) and the outer sleeve (2); The adjustable mechanism comprises a threaded connecting pipe (3) installed at the top of the lancet core (1), an outer rotating pipe (4) arranged outside the threaded connecting pipe (3), a fixed pipe (5) fixedly connected at the top of the rotating pipe (4), a luer joint (6) fixedly installed at the top of the fixed pipe (5), rotating handles (7) fixedly connected on both sides of the rotating pipe (4), and an identification scale (8) arranged on the outer surface of the rotating pipe (4).
2. The adjustable lancet head of claim 1 wherein: The locking mechanism comprises a fixed shell (10) fixed on one side of the outer sleeve (2), a threaded hole (11) formed in the surface of one side of the fixed shell (10), and a threaded column (12) threadedly connected in the fixed shell (10).
3. The adjustable lancet head of claim 2 wherein: The movable block (13) is slidingly connected between the outer sleeve (2) and the fixed shell (10), a threaded groove (14) is formed in the surface of one side of the movable block (13), the threaded column (12) is threadedly connected with the threaded groove (14), an elastic friction plate (15) is fixedly connected to one end of the movable block (13), and a knob (16) is fixedly connected to the other end of the movable block (13).
4. The adjustable lancet head of claim 3 wherein: The elastic friction plate (15) is arc-shaped in cross-section, a plurality of transverse grooves (17) are uniformly formed in the surface of one side of the elastic friction plate (15), the elastic friction plate (15) is made of medical-grade silicone rubber, has a hardness of Shore A 50±5, has an inner diameter smaller than the outer diameter of the lancet core (1) by 0.1-0.2 mm, and is in interference fit with the lancet core (1).
5. The adjustable lancet head of claim 1 wherein: Limiting sliding grooves (18) are formed in the inner wall surfaces of the outer sleeve (2) and the rotating pipe (4), fixed sliding rings (19) are fixedly sleeved on the outer walls of the fixed pipe (5) and the rotating pipe (4), and the limiting sliding grooves (18) are slidingly connected with the fixed sliding rings (19).
6. The adjustable lancet head of claim 1 wherein: The first silica gel sealing ring (9) is fixedly connected between the outer sleeve (2) and the lancet core (1), is slidingly connected between the first silica gel sealing ring (9) and the lancet core (1), is embedded in the gap between the lancet core (1) and the outer sleeve (2), has a thickness of 0.3-0.5 mm, and forms a dynamic sealing structure.
7. The adjustable lancet head of claim 1 wherein: The bottom of the threaded connecting pipe (3) is fixedly connected with a threaded pipe (20), the inner wall surface of the lancet core (1) is provided with threads, the threaded pipe (20) is in threaded connection with the lancet core (1), the outer side of the threaded pipe (20) is sleeved with a second silica gel sealing ring (21), the second silica gel sealing ring (21) is arranged between the lancet core (1) and the threaded pipe (20), the outer side sleeve (2) is provided with a sliding groove (22) on one side surface, the sliding groove (22) is internally and slidably connected with a sliding block (23), and one end of the sliding block (23) is fixedly connected with the threaded connecting pipe (3).
8. The adjustable lancet head of claim 1 wherein: The lancet core (1) is made of medical-grade stainless steel, the needle tip of the lancet core (1) is a bevel cutting structure, the bevel angle is 15°-25°, and the outer surface of the needle tip is coated with a medical-grade polytetrafluoroethylene coating with a thickness of 0.5-1 μm, the friction coefficient is ≤0.05, the outer side sleeve (2) is made of transparent medical-grade polypropylene material, the light transmittance is not less than 90%, and the material surface hardness reaches Rockwell hardness R95-105, and the outer side sleeve (2) can be repeatedly used after high-temperature and high-pressure disinfection.
9. The adjustable lancet head of claim 1 wherein: The identification scale (8) is marked with a G number scale identification on one side, and each identification scale (8) corresponds to a 0.5G aperture change.
10. The adjustable lancet head of claim 1 wherein: The external thread of the threaded connecting pipe (3) and the internal thread of the rotating pipe (4) form a fine thread pair, the pitch is 0.5-0.7mm, the thread rise angle is smaller than the equivalent friction angle to realize self-locking, the lancet core (1) is retracted when the rotating pipe (4) rotates clockwise, and the lancet core (1) is extended when the rotating pipe (4) rotates counterclockwise.