Needle head connecting structure for needle flow test
By designing the fixing bar, press rod, transmission rod and lock block structure in the needle flow test device, the problem of the test needle being flushed and disengaged due to excessive water flow impulse is solved, and the needle is stable and fixed, improving the reliability of the test.
Patent Information
- Application Number
- CN202420781061.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-04-16
AI Technical Summary
When the existing needle flow test device is conducting flow test, due to the excessive impact of the water flow, the test needle is flushed and disengaged from the port of the needle connecting tube, which is insufficient in fixing effect.
A needle connection structure is designed, including a fixing bar, a press rod, a transmission rod, a lock block and a lock block guide groove. Through articulation and sliding connection, the transmission rod and a lock block are used to drive the press rod to tighten the test needle, and The locking structure and rotary rod drive device are used to achieve a stable fixation of the needle.
It significantly improves the fixing effect of the test needle on the needle connection tube, prevents the needle from being pulsating due to excessive water flow impulse, and has a simple structure and convenient operation.
Smart Images
Figure CN222357836U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field related to needle flow testing, in particular to a needle connection structure for needle flow testing. Background Art
[0002] An injection needle is a medical device used to inject liquid medication into human tissues and organs. It mainly consists of the following parts: 1. Needle: The front end of the needle, used to inject medication or collect samples. The needle is usually made of stainless steel, which has high strength and corrosion resistance. 2. Needle body: The main part that connects the needle and the syringe. The needle body is usually made of plastic or metal, which has high strength and corrosion resistance. 3. Syringe: The back end of the needle, used to draw or inject medication. The syringe is usually made of plastic or glass, which has high transparency and corrosion resistance. 4. Piston: The internal moving part used to control the flow rate of medication. The piston is usually made of plastic or rubber, which has good sealing and corrosion resistance. 5. Safety protection device: This is an additional device used to prevent accidental needle injury and cross infection. Safety protection devices include protective covers, safety locks, etc.
[0003] During the current production of syringes, flow testing is typically required to ensure compliance with medical industry standards and prevent defective products from entering the market. However, existing needle flow testing devices often dislodge the test needle from the needle connector due to excessive water flow during the flow test.
[0004] In summary, there is a need for a needle connection structure for needle flow testing that can improve the fixing effect of the test needle. Utility Model Content
[0005] The utility model aims to overcome the deficiency in the prior art that, during the flow test, the test needle of the needle flow test device is often washed out from the port of the needle connecting tube due to excessive impact of the water flow, and provides a needle connecting structure for needle flow testing that can improve the fixing effect of the test needle.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] The lock block is hingedly mounted on the outer wall of the needle connecting tube, and the lock block is placed in the lock block guide groove and is slidably connected to the lock block. A locking structure is provided between the lock block and the lock block guide groove.
[0008] When the test needle is sleeved on the tube mouth of the needle connecting tube, the locking block in the locking block guide groove is pushed to move it toward the side away from the fixing bar. At this time, under the transmission action of the transmission rod, the pressure rod will be driven to rotate, so that the other end of the pressure rod will be pressed against the test needle at the tube mouth of the needle connecting tube. The locking block in the locking block guide groove is then locked in position by the locking structure to ensure that the pressure rod can always be pressed tightly against the test needle. This design greatly improves the fixing effect of the test needle on the needle connecting tube, and can effectively prevent the test needle from being washed out of the end of the needle connecting tube due to excessive impact of water flow.
[0009] Preferably, the lock block is provided with a cavity inside, and a lock post through hole is provided on the side wall of the cavity. A lock post is slidably connected to the lock post through hole, and one end of the lock post is provided with a lock tooth. A lock tooth bar matching the lock tooth is provided on the side wall of the lock block guide groove. The lock block is provided with a lock post driving device connected to the lock post. When the lock block is locked in position, the operator controls the lock post in the lock post through hole to move toward the lock tooth bar through the lock post driving device, so that the lock tooth on the lock post engages with the lock tooth bar on the lock block guide groove, thereby completing the position locking of the lock block. The structure is simple and the control is convenient.
[0010] Preferably, the lock cylinder driving device includes a rotary rod installed in the cavity, the rotary rod and the cavity are rotatably connected, the rotary rod is arranged perpendicular to the lock cylinder, one end of the rotary rod passes through the side wall of the cavity and is placed outside the lock block, a transmission gear is sleeved and fixed on the rotary rod, and a transmission rack matching the transmission gear is provided on the side wall of the lock cylinder, and the transmission gear and the transmission rack are meshed. When the lock block is locked in position, the operator rotates the rotary rod, and the transmission gear and the transmission rack cooperate to drive the lock cylinder in the lock cylinder through hole to move in the direction of the lock rack, so that the lock teeth on the lock cylinder and the lock rack on the lock block guide groove engage with each other, completing the position locking of the lock block. The structure is simple and the operation is convenient.
[0011] Preferably, the inner wall of the cavity is provided with a rotary rod groove that matches the other end of the rotary rod, and a torsion spring is provided inside the rotary rod groove, one end of the torsion spring is fixed to the inner wall of the rotary rod groove, and the other end of the torsion spring is fixed to the other end of the rotary rod. In the natural state, the lock teeth on the lock column and the lock rack bar on the lock block guide groove are in a mutually meshed state, and the position of the lock block is locked and fixed. When the lock block needs to be pushed, the lock teeth on the lock column are retracted into the lock column through hole by rotating the rotary rod (the torsion spring is rotated and stretched), thereby releasing the locked state of the lock block; when the lock block is pushed into place, the operator only needs to loosen the rotary rod, and the rotary rod will automatically reset under the reset action of the torsion spring, and drive the lock teeth on the lock column to extend out of the lock column through hole and re-engage with the lock rack bar on the lock block guide groove, completing the position locking of the lock block. The structure is simple and the operation is convenient.
[0012] Preferably, a top block is fixed to the other end of the pressure rod, and the top block is placed on the side of the pressure rod facing the needle connecting tube. The multi-point cooperation between the top block and the pressure rod improves the fixing effect of the test needle.
[0013] Preferably, the outer edge of the tube mouth of the needle connecting tube is provided with a transition fillet. Through the transition design of the transition fillet, the test needle can be easily connected to the tube mouth of the needle connecting tube.
[0014] The beneficial effects of the utility model are: improving the fixing effect of the test needle on the needle connecting tube; simple structure and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural diagram of the utility model;
[0016] Figure 2 yes Figure 1 Internal structure diagram of the middle locking block;
[0017] Figure 3 yes Figure 1 Cross-sectional view at AA in the middle;
[0018] Figure 4 yes Figure 3 Enlarged view of point B in the middle.
[0019] In the figure: 1. Needle connecting tube, 2. Fixing bar, 3. Pressure rod, 4. Transmission rod, 5. Transmission rod guide groove, 6. Lock block, 7. Lock block guide groove, 8. Cavity, 9. Lock post through hole, 10. Lock post, 11. Lock tooth, 12. Lock rack, 13. Rotary rod, 14. Transmission gear, 15. Transmission rack, 16. Rotary rod groove, 17. Torsion spring, 18. Ejector block, 19. Transition fillet, 20. Test needle. DETAILED DESCRIPTION
[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0021] like Figure 1-4 In the described embodiment, a needle connection structure for needle flow testing includes a needle connecting tube 1, a fixing strip 2 is provided on the outer wall of the needle connecting tube 1, one end of the fixing strip 2 is fixedly connected to the needle connecting tube 1, and the other end of the fixing strip 2 is provided with a pressure rod 3, one end of the pressure rod 3 is hinged to the fixing strip 2, and the other end of the pressure rod 3 is placed on the side of the tube mouth of the needle connecting tube 1, and a transmission rod 4 is provided on the side wall of the pressure rod 3, one end of the transmission rod 4 is hinged to the pressure rod 3, a transmission rod guide groove 5 matching the transmission rod 4 is provided on the fixing strip 2, the other end of the transmission rod 4 passes through the transmission rod guide groove 5 and is movably connected thereto, and a locking block 6 is installed on the other end of the transmission rod 4, and the transmission rod 4 and the locking block 6 are hinged, and a locking block guide groove 7 matching the locking block 6 is provided on the outer wall of the needle connecting tube 1, the locking block 6 is placed in the locking block guide groove 7 and is slidably connected thereto, and a locking structure is provided between the locking block 6 and the locking block guide groove 7.
[0022] A cavity 8 is provided inside the locking block 6, and a lock column through hole 9 is provided on the side wall of the cavity 8. A lock column 10 is slidably connected to the lock column through hole 9. A lock tooth 11 is provided at one end of the lock column 10, and a lock rack 12 matching the lock tooth 11 is provided on the side wall of the lock block guide groove 7. A lock column driving device connected to the lock column 10 is provided on the locking block 6.
[0023] The lock cylinder driving device includes a rotary rod 13 installed in the cavity 8. The rotary rod 13 is rotatably connected to the cavity 8. The rotary rod 13 is arranged perpendicular to the lock cylinder 10. One end of the rotary rod 13 passes through the side wall of the cavity 8 and is placed outside the lock block 6. A transmission gear 14 is fixed on the rotary rod 13. A transmission rack 15 matching the transmission gear 14 is provided on the side wall of the lock cylinder 10. The transmission gear 14 and the transmission rack 15 are meshed.
[0024] A rotation rod groove 16 matching the other end of the rotation rod 13 is provided on the inner wall of the cavity 8, and a torsion spring 17 is provided inside the rotation rod groove 16. One end of the torsion spring 17 is fixed to the inner wall of the rotation rod groove 16, and the other end of the torsion spring 17 is fixed to the other end of the rotation rod 13.
[0025] A top block 18 is fixed to the other end of the pressure rod 3 , and the top block 18 is placed on the side of the pressure rod 3 facing the needle connecting tube 1 .
[0026] A transition fillet 19 is provided at the outer edge of the tube opening of the needle connecting tube 1 .
[0027] In the natural state, the lock teeth 11 on the lock column 10 and the lock rack 12 on the lock block guide groove 7 are in a mutually meshed state, and the position of the lock block 6 is locked and fixed.
[0028] When the test needle 20 is inserted into the nozzle of the needle connecting tube 1, the rotary lever 13 is first rotated (torsion spring 17 is rotated and stretched), and the transmission gear 14 and transmission rack 15 cooperate to drive the lock post 10 in the lock post through hole 9 to move, causing the lock teeth 11 on the lock post 10 to retract into the lock post through hole 9, thereby releasing the lock block 6. The lock block 6 is then pushed in the lock block guide groove 7 to move away from the fixed bar 2. At this time, the transmission rod 4 drives the pressure rod 3 to rotate, causing the pressure rod 3 and the push block 18 to press against the test needle 20 at the nozzle of the needle connecting tube 1. When the locking block 6 is pushed into place, the rotary rod 13 is released. At this time, the rotary rod 13 will automatically reset under the reset action of the torsion spring 17, and drive the lock tooth 11 on the lock column 10 to extend out of the lock column through hole 9 and re-engage with the lock rack 12 on the lock block guide groove 7, completing the position locking of the locking block 6 to ensure that the pressure rod 3 can always be pressed against the test needle 20.
Claims
1. A needle connection structure for needle flow testing, characterized in that: The invention comprises a needle connecting tube (1), wherein a fixing strip (2) is provided on the outer side wall of the needle connecting tube (1), one end of the fixing strip (2) is fixedly connected to the needle connecting tube (1), and the other end of the fixing strip (2) is provided with a pressure rod (3), one end of the pressure rod (3) is hinged to the fixing strip (2), and the other end of the pressure rod (3) is placed on the side of the tube mouth of the needle connecting tube (1), and a transmission rod (4) is provided on the side wall of the pressure rod (3), one end of the transmission rod (4) is hinged to the pressure rod (3), and the fixing strip (2) is fixedly connected to the needle connecting tube (1). The strip (2) is provided with a transmission rod guide groove (5) matching with the transmission rod (4), the other end of the transmission rod (4) passes through the transmission rod guide groove (5) and is movably connected thereto, the other end of the transmission rod (4) is provided with a locking block (6), the transmission rod (4) and the locking block (6) are hingedly connected, the outer side wall of the needle connecting tube (1) is provided with a locking block guide groove (7) matching with the locking block (6), the locking block (6) is placed in the locking block guide groove (7) and is slidably connected thereto, and a locking structure is provided between the locking block (6) and the locking block guide groove (7).
2. The needle connection structure for needle flow testing according to claim 1, characterized in that: The locking block (6) is provided with a cavity (8) inside, and a lock column through hole (9) is also provided on the side wall of the cavity (8), a lock column (10) is slidably connected in the lock column through hole (9), a lock tooth (11) is provided at one end of the lock column (10), a lock tooth bar (12) matching the lock tooth (11) is provided on the side wall of the locking block guide groove (7), and a lock column driving device connected to the lock column (10) is provided on the locking block (6).
3. The needle connection structure for needle flow testing according to claim 2, characterized in that: The lock column driving device comprises a rotary rod (13) installed in the cavity (8), the rotary rod (13) and the cavity (8) are rotatably connected, the rotary rod (13) and the lock column (10) are arranged vertically, one end of the rotary rod (13) passes through the side wall of the cavity (8) and is placed outside the lock block (6), a transmission gear (14) is sleeved and fixed on the rotary rod (13), and a transmission rack (15) matching the transmission gear (14) is provided on the side wall of the lock column (10), and the transmission gear (14) and the transmission rack (15) are meshed.
4. The needle connection structure for needle flow testing according to claim 3, characterized in that: A rotating rod groove (16) matching the other end of the rotating rod (13) is provided on the inner wall of the cavity (8), a torsion spring (17) is provided inside the rotating rod groove (16), one end of the torsion spring (17) is fixed to the inner wall of the rotating rod groove (16), and the other end of the torsion spring (17) is fixed to the other end of the rotating rod (13).
5. A needle connection structure for needle flow testing according to any one of claims 1 to 4, characterized in that: A top block (18) is fixed to the other end of the pressure rod (3), and the top block (18) is placed on a side of the pressure rod (3) facing the needle connecting tube (1).
6. A needle connection structure for needle flow testing according to any one of claims 1 to 4, characterized in that: A transition fillet (19) is provided at the outer edge of the tube opening of the needle connecting tube (1).