Continuous microsyringe

Abstract

The utility model relates to the technical field of metrological verification, and discloses a continuous microsyringe which comprises a needle tube, the outer wall of the needle tube is fixedly connected with a clamping block, the outer wall of the clamping block is slidably connected with a rotating plate, the outer wall of the rotating plate is rotatably connected with a base, the upper surface of the base is fixedly connected with a spring body, and the upper surface of the spring body is fixedly connected with a piston rod. A connecting rod is fixedly connected to the lower surface of the base, a push block is fixedly connected to the lower surface of the connecting rod, a clamping jaw is rotatably connected to the inner wall of the push block, a limiting rod is slidably connected to the inner wall of the clamping jaw, the two ends of the limiting rod are fixedly connected to the inner wall of a needle tube, and a needle head is slidably connected to the outer wall of the clamping jaw. And a quantifying component is arranged on the outer wall of the needle tube. The needle tube is inserted into the needle head, the rotating plate is pulled upwards to drive the base to enable the connecting rod to move, the spring body elastically deforms, the connecting rod drives the push block to enable the clamping jaw to clamp the needle head, and therefore the effects of being fast to disassemble and assemble and suitable for different types of needle heads can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of sample injector technology, and in particular to a continuous micro-sample injector. Background Technology

[0002] An injector is a device in a chromatography system that can quantitatively deliver an analytical sample into the chromatographic column. Injectors come in various specifications, among which micro-injectors can accurately measure minute amounts of sample. Therefore, they have a more refined structure and are more expensive. In chromatographic experiments, fast and accurate injection with high repeatability is required to ensure the accuracy of the experiment.

[0003] A search revealed Chinese Patent Publication No. CN211825878U, which discloses a quantitative micro-syringe for metrological verification. The micro-syringe includes a base, a liftable platform, an outer sleeve, and a micro-syringe body. A disc is positioned above the outer side of the micro-syringe body. Sliding blocks are fixedly connected to both sides of the outer wall of the disc, and an optical glass magnifying lens is fixedly connected between the sliding blocks. Slide rails are provided on both sides of the inner wall of the outer sleeve, and the other side of each sliding block is slidably connected to one of the slide rails. A hand-operated push rod is fixedly connected above the disc, with its tip penetrating the outer sleeve and extending to the upper outer side of the outer sleeve. A return spring is sleeved on the upper outer wall of the hand-operated push rod. This utility model relates to the field of metrological verification technology. This quantitative micro-syringe for metrological verification significantly improves the accuracy of micro-syringe readings, effectively ensuring no angular deviation in the readings. The use of a positioning track push rod ensures the direction of the push rod force, effectively preventing incorrect push rod direction and extending the service life of the micro-syringe.

[0004] In the existing technology, the needle fixing method of traditional injectors is usually relatively simple, which makes it difficult to adapt to injection needles of different specifications and shapes. When different needles are needed, different syringes are required, resulting in the problem of low applicability of the injector. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a continuous micro-syringe, which aims to solve the problem that the needle installation method of the syringe in the prior art is relatively simple, which makes it difficult for the syringe tube to adapt to different specifications and shapes of injection needles. When different needles are needed, different syringe tubes are required, resulting in low applicability of the syringe.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a continuous micro-syringe includes a syringe, a locking block fixedly connected to the outer wall of the syringe, a rotating plate slidably connected to the outer wall of the locking block, a base rotatably connected to the outer wall of the rotating plate, a spring body fixedly connected to the upper surface of the base, the outer wall of the spring body fixedly connected to the inner wall of the syringe, a connecting rod fixedly connected to the lower surface of the base, a push block fixedly connected to the lower surface of the connecting rod, a gripper rotatably connected to the inner wall of the push block, a limiting rod slidably connected to the inner wall of the gripper, both ends of the limiting rod fixedly connected to the inner wall of the syringe, a needle tip slidably connected to the outer wall of the gripper, the inner wall of the needle tip slidably connected to the outer wall of the syringe, and a quantitative component provided on the outer wall of the syringe.

[0007] The above technical solution involves pulling the rotating plate to make it rotate within the inner wall of the base. The rotating plate then drives the base to slide within the inner wall of the syringe. The rotating plate is then fitted onto the outer wall of the clamping block and rotated, thus achieving a self-locking effect. During the movement of the base, the spring body is compressed, causing it to undergo elastic deformation, thereby providing power for the base to return to its original position. The base drives the connecting rod to simultaneously move the push block upwards. The movement of the push block simultaneously moves the gripper upwards. During the upward movement, the gripper clamps the needle inwards under the action of the limiting rod, thus achieving the effect of quick assembly and disassembly and being applicable to different types of needles.

[0008] As a further description of the above technical solution:

[0009] The quantitative component includes a metering device, the inner wall of which is slidably connected to the outer wall of the needle tube, the lower surface of which is slidably connected to the upper surface of the needle tip, and a threaded rod is threadedly connected to the inner wall of the metering device.

[0010] The above technical solution involves moving the part of the metering device that is fitted onto the outer wall of the syringe to the corresponding scale. The rotation of the threaded rod allows the metering device to slide stably on the inner wall of the support block. At the same time, the limiting rod part of the metering device slides within the inner wall of the support block, thus achieving the effect of limiting the metering device and preventing it from shifting.

[0011] As a further description of the above technical solution:

[0012] The threaded rod is rotatably connected to both ends of a bearing block. The inner wall of the bearing block is rotatably connected to the outer wall of a worm gear. A worm gear is provided on the outer wall of the threaded rod. A knob is fixedly connected to the worm gear. A clamping assembly is provided on the outer wall of the bearing block.

[0013] The above technical solution allows the worm gear to rotate synchronously by turning the knob. During this rotation, the threaded rod installed on the inner wall of the support block rotates, driving the metering device to slide within the inner wall of the support block. This limits the movement distance of the injector, preventing it from exceeding the required value.

[0014] As a further description of the above technical solution:

[0015] The clamping assembly includes a bottom shell, the inner wall of which is slidably connected to the outer wall of the support block, the inner wall of which is slidably connected to the outer wall of the needle, and a pressing block slidably connected to the inner wall of the bottom shell, the upper surface of which is slidably connected to the lower surface of the support block.

[0016] With the above technical solution: when the bearing block is inserted into the inner wall of the bottom shell, the bearing block will push the lower pressure block set on the inner wall of the bottom shell. Due to the inclined surface of the lower pressure block, the spring rod will be pushed to slide stably in the inner wall of the bottom shell during the downward movement of the lower pressure block.

[0017] As a further description of the above technical solution:

[0018] A spring rod is slidably connected to the outer wall of the pressure block, and the outer wall of the spring rod is slidably connected to the inner wall of the clamping assembly.

[0019] Through the above technical solution: when the pressure block slides on the inner wall of the bottom shell and pushes the spring rod, the elastic part on the spring rod will undergo elastic deformation, thereby providing power for the spring rod to move out. The movement of the spring rod can simultaneously clamp the subsequent parts.

[0020] As a further description of the above technical solution:

[0021] A movable block is fixedly connected to the outer left side of the spring rod, and a rotating block is slidably connected to the inner wall of the movable block.

[0022] The above technical solution involves fixing the right outer wall of the movable block to the left outer wall of the spring rod. When the spring rod moves, the movable block also moves synchronously inside the bottom shell, providing power for the movement of the rotating block.

[0023] As a further description of the above technical solution:

[0024] The inner wall of the rotating block is fixedly connected to a rotating shaft, and the two ends of the rotating shaft are rotatably connected to the inner wall of the clamping assembly.

[0025] Through the above technical solution: when the moving block pushes the rotating block to move inside the bottom shell, the rotating shaft set inside the bottom shell can make the rotating block rotate, thereby enabling it to push the fixed block to drive the clamping block for clamping.

[0026] As a further description of the above technical solution:

[0027] The inner wall of the rotating block is rotatably connected to a fixed block, and the outer wall of the fixed block is fixedly connected to a clamping block.

[0028] The above technical solution involves placing the sample vial on the inner wall of the bottom shell before the sample injection operation. When the rotating block rotates, it drives the fixed block to further drive the clamping block to clamp the vial, thereby achieving stable clamping of the sample vial and preventing the needle from bending due to the movement of the vial during sample injection.

[0029] This utility model has the following beneficial effects:

[0030] 1. In this utility model, the needle tube is inserted into the inner wall of the needle, and the rotating plate is pulled upward to drive the base to move the connecting rod. At the same time, the spring body will undergo elastic deformation, and the rotating plate will be sleeved on the outer wall of the locking block and the locking block will be rotated to achieve a self-locking effect. The connecting rod drives the push block to make the clamping claw lock the needle under the action of the limiting rod. This can achieve the effect of quick assembly and disassembly and is applicable to different types of needles.

[0031] 2. In this utility model, the needle and the supporting block are inserted into the inner wall of the bottom shell. The supporting block pushes the lower pressing block to move the spring rod. The spring rod pushes the moving block to make the rotating block rotate under the action of the rotating shaft. The rotation of the rotating block drives the fixing block to make the clamping block clamp the sampling bottle, thereby achieving the effect of preventing the sampling bottle from moving and causing the needle to bend. Attached Figure Description

[0032] Figure 1 This is a perspective view of a continuous micro-sampler proposed in this utility model;

[0033] Figure 2 This is a partial structural diagram of the base of a continuous micro-sampler proposed in this utility model;

[0034] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0035] Figure 4 This is a partial structural diagram of the threaded rod of a continuous micro-sampler proposed in this utility model;

[0036] Figure 5 This is a partial structural diagram of the moving block of a continuous micro-sampler proposed in this utility model.

[0037] Legend:

[0038] 1. Needle; 11. Clamping block; 12. Rotating plate; 13. Base; 14. Spring body; 15. Connecting rod; 16. Push block; 17. Gripper; 18. Limiting rod; 19. Needle; 2. Metering component; 21. Meter; 22. Threaded rod; 23. Bearing block; 24. Worm gear; 25. Knob; 3. Clamping component; 31. Bottom shell; 32. Pressing block; 33. Spring rod; 34. Moving block; 35. Rotating block; 36. Rotating shaft; 37. Fixing block; 38. Clamping block. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Reference Figure 1 , Figure 2 and Figure 3 An embodiment of this utility model provides a continuous micro-syringe, including a needle tube 1, a locking block 11 fixedly connected to the outer wall of the needle tube 1, a rotating plate 12 slidably connected to the outer wall of the locking block 11, a base 13 rotatably connected to the outer wall of the rotating plate 12, a spring body 14 fixedly connected to the upper surface of the base 13, the outer wall of the spring body 14 fixedly connected to the inner wall of the needle tube 1, a connecting rod 15 fixedly connected to the lower surface of the base 13, a push block 16 fixedly connected to the lower surface of the connecting rod 15, a gripper 17 rotatably connected to the inner wall of the push block 16, a limiting rod 18 slidably connected to the inner wall of the gripper 17, both ends of the limiting rod 18 fixedly connected to the inner wall of the needle tube 1, a needle tip 19 slidably connected to the outer wall of the gripper 17, the inner wall of the needle tip 19 slidably connected to the outer wall of the needle tube 1, and a quantitative component 2 provided on the outer wall of the needle tube 1.

[0041] Specifically, the lower end of the syringe 1 is first inserted into the inner wall of the needle 19. The rotating plate 12 is pulled upward to drive the base 13 to slide on the inner wall of the syringe 1, causing the spring body 14 to undergo elastic deformation. The rotating plate 12 is rotated on the inner wall of the base 13, and the hole on the rotating plate 12 is fitted onto the outer wall of the locking block 11. The locking block 11 is rotated to lock the rotating plate 12, thereby achieving a self-locking effect. As the connecting rod 15 moves upward, the push block 16 is driven to rise synchronously. The rise of the push block 16 drives the gripper 17 to move. During the movement of the gripper 17, the limiting rod 18 set on its inner wall can make the gripper 17 rotate inward, thereby achieving the effect of clamping the needle 19 to prevent it from falling off. This enables quick assembly and disassembly of the needle 19, and also achieves the effect of being applicable to different needles 19.

[0042] Reference Figure 1 and Figure 4 The quantitative component 2 includes a metering device 21. The inner wall of the metering device 21 is slidably connected to the outer wall of the needle tube 1, and the lower surface of the metering device 21 is slidably connected to the upper surface of the needle tip 19. A threaded rod 22 is threadedly connected to the inner wall of the metering device 21. A bearing block 23 is rotatably connected to both ends of the threaded rod 22. The inner wall of the bearing block 23 is rotatably connected to the outer wall of the worm gear 24. The worm gear 24 is provided on the outer wall of the threaded rod 22. A knob 25 is fixedly connected to the worm gear 24. A clamping component 3 is provided on the outer wall of the bearing block 23.

[0043] Specifically, rotating the knob 25 drives the worm gear 24 to rotate synchronously. The rotation of the worm gear 24 drives the threaded rod 22 to rotate simultaneously on the inner wall of the support block 23. While the threaded rod 22 rotates, the metering device 21 can rise stably and slide on the inner wall of the support block 23. Thus, when taking samples, the metering device 21 can be moved to the specified scale to achieve the effect of taking accurate measurements.

[0044] Reference Figure 1 and Figure 5 The clamping assembly 3 includes a bottom shell 31, the inner wall of which is slidably connected to the outer wall of the support block 23, and the inner wall of the bottom shell 31 is slidably connected to the outer wall of the needle 19. A pressing block 32 is slidably connected to the inner wall of the bottom shell 31, and the upper surface of the pressing block 32 is slidably connected to the lower surface of the support block 23. A spring rod 33 is slidably connected to the outer wall of the pressing block 32, and the outer wall of the spring rod 33 is slidably connected to the inner wall of the clamping assembly 3. A moving block 34 is fixedly connected to the left outer wall of the spring rod 33, and a rotating block 35 is slidably connected to the inner wall of the moving block 34. A rotating shaft 36 is fixedly connected to the inner wall of the rotating block 35, and both ends of the rotating shaft 36 are rotatably connected to the inner wall of the clamping assembly 3. A fixed block 37 is rotatably connected to the inner wall of the rotating block 35, and a clamping block 38 is fixedly connected to the outer wall of the fixed block 37.

[0045] Specifically, the sample-containing bottle is first placed inside the bottom shell 31. The needle 19 and the support block 23 are then inserted into the inner wall of the bottom shell 31. The insertion of the support block 23 pushes the pressure block 32 to slide on the inner wall of the bottom shell 31, causing the spring rod 33 to slide synchronously on the inner wall of the bottom shell 31. The spring part on the spring rod 33 undergoes elastic deformation, providing power for the spring rod 33 to return to its original position and push the pressure block 32 back to its original position. The movement of the spring rod 33 further pushes the moving block 34 to move, causing the moving block 34 to drive the rotating block 35 to rotate. While moving, the rotating block 35 rotates under the action of the rotating shaft 36 and drives the fixed block 37 to drive the clamping block 38 to clamp. This achieves the effect of stably clamping the bottle and preventing the needle 19 from bending due to the movement of the bottle while sampling.

[0046] Working principle: Rotating the knob 25 drives the worm gear 24 to rotate synchronously. The rotation of the worm gear 24 can drive the threaded rod 22 to rotate further. While the threaded rod 22 rotates, it can make the metering device 21 move synchronously and slide stably on the inner wall of the support block 23. According to the required sampling amount, the metering device 21 is adjusted to the corresponding scale, thereby preventing the injection amount from exceeding the required value during aspiration.

[0047] Different styles of needles 19 can be selected as needed. The needle tube 1 is inserted into the inner wall of the needle 19. The rotating plate 12 is lifted upward to drive the base 13 to slide stably on the inner wall of the needle tube 1, so as to prevent the base 13 from leaving the movement trajectory. The rotating plate 12 is placed on the outer wall of the locking block 11, and then the locking block 11 is rotated to achieve the self-locking effect. While the connecting rod 15 moves, it can compress the spring body 14 to make it elastically deform, so as to provide power for the return of the base 13. The movement of the connecting rod 15 can drive the push block 16 to move on the inner wall of the needle tube 1. During the movement, the gripper 17 will be driven to move upward by the push block 16. Under the action of the limiting rod 18, the gripper 17 can clamp inward, so as to stably clamp the needle 19 and prevent it from falling off. This can achieve the effect of quick disassembly and assembly of the needle 19, and can be used for the installation of different types of needles 19.

[0048] Then, the support block 23 and the needle 19 are inserted into the inner wall of the bottom shell 31. The support block 23 pushes the pressing block 32 downward and pushes the spring rod 33 to slide in the inner wall of the bottom shell 31. The spring part on the spring rod 33 can be compressed to provide power for the return of the spring rod 33. When the spring rod 33 moves, the moving block 34 fixed on its left outer wall will move. The movement of the moving block 34 causes the rotating block 35 to move synchronously. During the movement, the rotating shaft 36 fixed on the inner wall of the rotating block 35 can make the rotating block 35 rotate, thereby further causing the fixed block 37 to drive the clamping block 38 to move so that the bottle containing the sample placed in the bottom shell 31 is clamped. This injector can achieve quick disassembly and assembly of the needle 19 and can be used with different needles 19. On the other hand, it can also fix the container containing the sample and prevent the needle 19 from bending due to the movement of the bottle during the injection process.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A continuous microsyringe, comprising a syringe (1), characterized in that: The outer wall of the needle tube (1) is fixedly connected to a locking block (11), the outer wall of the locking block (11) is slidably connected to a rotating plate (12), the outer wall of the rotating plate (12) is rotatably connected to a base (13), the upper surface of the base (13) is fixedly connected to a spring body (14), the outer wall of the spring body (14) is fixedly connected to the inner wall of the needle tube (1), the lower surface of the base (13) is fixedly connected to a connecting rod (15), the lower surface of the connecting rod (15) is fixedly connected to a push block (16), the inner wall of the push block (16) is rotatably connected to a gripper (17), the inner wall of the gripper (17) is slidably connected to a limit rod (18), the two ends of the limit rod (18) are fixedly connected to the inner wall of the needle tube (1), the outer wall of the gripper (17) is slidably connected to a needle tip (19), the inner wall of the needle tip (19) is slidably connected to the outer wall of the needle tube (1), and the outer wall of the needle tube (1) is provided with a quantitative component (2).

2. The continuous micro-syringe according to claim 1, characterized in that: The quantitative component (2) includes a metering device (21), the inner wall of which is slidably connected to the outer wall of the needle tube (1), the lower surface of which is slidably connected to the upper surface of the needle tip (19), and the inner wall of which is threadedly connected to a threaded rod (22).

3. A continuous micro-syringe according to claim 2, characterized in that: The threaded rod (22) is rotatably connected to two bearing blocks (23) at both ends. The inner wall of the bearing block (23) is rotatably connected to the outer wall of the worm gear (24). The outer wall of the threaded rod (22) is provided with the worm gear (24). The worm gear (24) is fixedly connected with a knob (25). The outer wall of the bearing block (23) is provided with a clamping assembly (3).

4. A continuous micro-syringe according to claim 3, characterized in that: The clamping assembly (3) includes a bottom shell (31), the inner wall of which is slidably connected to the outer wall of the support block (23), the inner wall of which is slidably connected to the outer wall of the needle (19), and a lower pressure block (32) slidably connected to the inner wall of the bottom shell (31), the upper surface of which is slidably connected to the lower surface of the support block (23).

5. A continuous micro-syringe according to claim 4, characterized in that: The outer wall of the pressing block (32) is slidably connected to a spring rod (33), and the outer wall of the spring rod (33) is slidably connected to the inner wall of the clamping assembly (3).

6. A continuous micro-syringe according to claim 5, characterized in that: A movable block (34) is fixedly connected to the left outer wall of the spring rod (33), and a rotating block (35) is slidably connected to the inner wall of the movable block (34).

7. A continuous micro-syringe according to claim 6, characterized in that: The inner wall of the rotating block (35) is fixedly connected to a rotating shaft (36), and the two ends of the rotating shaft (36) are rotatably connected to the inner wall of the clamping assembly (3).

8. A continuous micro-syringe according to claim 7, characterized in that: The inner wall of the rotating block (35) is rotatably connected to a fixed block (37), and the outer wall of the fixed block (37) is fixedly connected to a clamping block (38).

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