Sample adding mechanism applied to chemiluminescence tester

Abstract

The utility model relates to the field of chemiluminiscence testers, and discloses a sample adding mechanism applied to a chemiluminiscence tester, which comprises a machine body, a driving arm is arranged on the surface of the machine body, a sample adding needle body is arranged at the bottom of the driving arm, and a micro motor is fixedly connected to the inner wall of the driving arm. The output end of the micro motor is fixedly connected with a rotating shaft, the outer wall of the rotating shaft is fixedly connected with a transmission wheel, the transmission wheel is in transmission connection with a transmission belt, the inner wall of the driving arm is fixedly connected with a supporting plate, the inner wall of the supporting plate is rotationally connected with a supporting shaft, and the bottom end of the supporting shaft is fixedly connected with a cam. And a turntable is arranged on the side wall of the cam. According to the utility model, the micro motor, the rotating shaft, the transmission wheel and other structures are arranged, so that the sample adding needle rotates and swings before and after cleaning, residual liquid on the surface is thrown off, the cleaning effect is optimized, the subsequent interference on a sample or a reagent is reduced, and the accuracy and reliability of sample adding are improved.

Description

Technical Field

[0001] This utility model relates to the field of chemiluminescence analyzers, and more particularly to a sample dispensing mechanism used in chemiluminescence analyzers. Background Technology

[0002] A chemiluminescence analyzer is a high-tech instrument used for clinical laboratory analysis. It mainly uses chemiluminescence immunoassay technology to detect samples such as blood, serum, and plasma to determine the levels of biological indicators related to diseases, thereby assisting doctors in disease diagnosis, assessment, and treatment planning. Chemiluminescence analyzers require sample addition because they quantitatively analyze target substances by measuring the chemiluminescence intensity in the sample. The sample needs to be added to the instrument, which is usually done through an automated sample addition system.

[0003] A search revealed Chinese Patent Publication No. CN216449438U, which discloses a sample loading mechanism for a chemiluminescence analyzer. The mechanism involves filling the sample storage chamber with air via a sealed gas inlet pipe, causing a sealing sliding plate to slide downwards. This pushes the sample to be tested from the sample storage chamber through a deflecting nozzle to the top of the slide body. A stepper motor is then controlled to rotate the slide body via a central rotating disk and an extension rod, thus completing the automatic sample loading process and shortening the continuous detection time.

[0004] In the above technical solution, the sample loading mechanism facilitates the replacement and rotation of the slide body to achieve the purpose of automatic sample loading. However, when the instrument is used for detection, the sample or reagent needs to be extracted by the sampling needle. After each extraction and injection, the sample or reagent is cleaned in the cleaning tank to avoid cross-contamination. Before and after cleaning the sampling needle, the residual sample, reagent or water on the surface cannot be shaken off, which prolongs the cleaning time. The residual water in the future will interfere with the sample or reagent, thereby reducing the sample loading efficiency and accuracy. Therefore, a sample loading mechanism for chemiluminescence analyzers is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a sample dispensing mechanism for a chemiluminescence analyzer, which aims to improve the problem that the existing sample dispensing mechanisms for chemiluminescence analyzers cannot shake off residual liquid on the surface of the dispensing needle before and after cleaning, thus reducing the efficiency and accuracy of sample dispensing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a sample application mechanism for a chemiluminescence analyzer, comprising a body, a drive arm disposed on the surface of the body, a sample application needle disposed at the bottom of the drive arm, a micro motor fixedly connected to the inner wall of the drive arm, a rotating shaft fixedly connected to the output end of the micro motor, a transmission wheel fixedly connected to the outer wall of the rotating shaft, a transmission belt connected to the transmission wheel, a support plate fixedly connected to the inner wall of the drive arm, a support shaft rotatably connected to the inner wall of the support plate, a cam fixedly connected to the bottom end of the support shaft, a turntable disposed on the side wall of the cam, a T-slot formed at the top of the turntable, a T-block slidably connected to the inner wall of the T-slot, a sliding rod fixedly connected to the inner wall of the T-block, and a spring sleeved on the outer wall of the sliding rod.

[0007] As a further description of the above technical solution:

[0008] The bottom end of the rotating shaft is fixedly connected to the top of the T-shaped block.

[0009] As a further description of the above technical solution:

[0010] The end of the slide bar is fixedly connected to the inner wall of the T-slot.

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

[0012] One end of the spring is fixedly connected to the inner wall of the T-slot, and the other end of the spring is fixedly connected to the side wall of the T-block.

[0013] As a further description of the above technical solution:

[0014] The bottom of the turntable is provided with a mounting groove, the inner wall of the mounting groove is provided with a mounting block, the inner wall of the mounting block is provided with a screw hole, and the inner wall of the screw hole is threaded with a fixing bolt.

[0015] As a further description of the above technical solution:

[0016] The bottom of the mounting block is fixedly connected to the top of the sample dispensing needle.

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

[0018] The outer wall of the mounting block is adapted to the inner wall of the mounting groove.

[0019] As a further description of the above technical solution:

[0020] The outer wall of the fixing bolt is threadedly connected to the inner wall of the turntable.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, by setting up a micro motor, rotating shaft, transmission wheel, transmission belt, support shaft, support plate, cam, turntable, T-slot, T-block, slide rod and spring, the sampling needle is allowed to rotate and swing before and after cleaning, so as to shake off the residual liquid on the surface. The optimized cleaning effect can reduce subsequent interference to samples or reagents and improve the efficiency and accuracy of sampling.

[0023] 2. In this utility model, by providing a mounting groove, mounting block, screw hole and fixing bolt, the sample dispensing needle body can be quickly replaced while achieving a positioning function, avoiding the need for repeated alignment for installation and improving the convenience of sample dispensing needle replacement. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the external structure of the sample dispensing mechanism for a chemiluminescence analyzer proposed in this utility model.

[0025] Figure 2 This is a top view schematic diagram of the main structure of a sample dispensing mechanism for a chemiluminescence analyzer proposed in this utility model;

[0026] Figure 3 This is a bottom view schematic diagram of the drive arm structure of a sample dispensing mechanism for a chemiluminescence analyzer proposed in this utility model;

[0027] Figure 4 This is a top view of a partial structural separation of a sample dispensing mechanism for a chemiluminescence analyzer proposed in this utility model;

[0028] Figure 5 This invention proposes a sample dispensing mechanism for a chemiluminescence analyzer. Figure 4 Enlarged view of region A in the middle;

[0029] Figure 6 This is a bottom view of a partial structural separation of the sample dispensing mechanism proposed in this utility model for use in a chemiluminescence analyzer.

[0030] Legend:

[0031] 1. Body; 2. Drive arm; 3. Sample dispensing needle; 4. Micro motor; 5. Rotary shaft; 6. Transmission wheel; 7. Transmission belt; 8. Support shaft; 9. Support plate; 10. Cam; 11. Turntable; 12. T-slot; 13. T-block; 14. Slide rod; 15. Spring; 16. Mounting slot; 17. Mounting block; 18. Screw hole; 19. Fixing bolt. Detailed Implementation

[0032] 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.

[0033] Reference Figure 1 - Figure 3 This utility model provides an embodiment of a sample dispensing mechanism for a chemiluminescence analyzer, comprising a body 1, a drive arm 2 disposed on the surface of the body 1, the drive arm 2 consisting of two sets of rocker arms, the front rocker arm of the drive arm 2 being extended or retracted by a translation mechanism, the translation mechanism being able to drive the dispensing needle 3 to move between the sample area, reagent area and reaction cup area, the translation mechanism being driven by an electric push rod, the entire drive arm 2 being displaced by a lifting mechanism, the lifting mechanism being driven by a motor to rotate a lead screw, a slider disposed on the surface of the lead screw being fixedly connected to the tail rocker arm of the drive arm 2, and the slider being slidably connected to a limiting rod, thereby enabling the drive arm 2 to achieve displacement, the bottom of the drive arm 2 being disposed of a dispensing needle 3, the dispensing needle 3 consisting of a dispensing needle and an injection pump, the injection pump controlling the piston to lift and lower to complete the extraction and injection of liquid, the dispensing needle needing to enter a cleaning tank for cleaning after each liquid extraction, cleaning Pipes are installed on both sides of the washing pool. Clean water is injected through the pipes to rinse the bottom of the sample needle body 3. A micro motor 4 is fixedly connected to the inner wall of the drive arm 2. The micro motor 4 is installed in the inner wall of the front end of the drive arm 2. A rotating shaft 5 is fixedly connected to the output end of the micro motor 4. A transmission wheel 6 is fixedly connected to the outer wall of the rotating shaft 5. There are two sets of transmission wheels 6, and the two sets of transmission wheels 6 are respectively connected to the outer wall of the rotating shaft 5 and the support shaft 8, which are used to connect two sets of transmission belts 7. The transmission wheel 6 is connected to the transmission belt 7. A support plate 9 is fixedly connected to the inner wall of the drive arm 2. A support shaft 8 is rotatably connected to the inner wall of the support plate 9. A cam 10 is fixedly connected to the bottom end of the support shaft 8. A turntable 11 is provided on the side wall of the cam 10. A T-slot 12 is opened on the top of the turntable 11. A T-block 13 is slidably connected to the inner wall of the T-slot 12. A slide rod 14 is fixedly connected to the inner wall of the T-block 13. A spring 15 is sleeved on the outer wall of the slide rod 14.

[0034] Reference Figure 4 - Figure 6The bottom end of the rotating shaft 5 is fixedly connected to the top of the T-block 13. After the rotating shaft 5 rotates, it can drive the turntable 11 to rotate as a whole. The end of the slide rod 14 is fixedly connected to the inner wall of the T-slot 12. One end of the spring 15 is fixedly connected to the inner wall of the T-slot 12, and the other end of the spring 15 is fixedly connected to the side wall of the T-block 13. There are two sets of springs 15, and the two sets of springs 15 are located on both sides of the T-block 13. The slide rod 14 ensures that the spring 15 is in a horizontal state when it is stretched and deformed, so that the T-block 13 can be better reset.

[0035] Reference Figure 4 and Figure 6 The bottom of the turntable 11 has a mounting groove 16, and the inner wall of the mounting groove 16 has a mounting block 17. The bottom of the mounting block 17 is fixedly connected to the top of the sample dispensing needle 3. The outer wall of the mounting block 17 is adapted to the inner wall of the mounting groove 16. The inner wall of the mounting block 17 has a screw hole 18, and the inner wall of the screw hole 18 is threaded with a fixing bolt 19. The outer wall of the fixing bolt 19 is threaded with the inner wall of the turntable 11. Rotating the fixing bolt 19 in the forward direction can gradually unscrew it from the left end of the turntable 11 until it is completely detached from the screw hole 18. At this time, manually holding the sample dispensing needle 3 can drive the mounting block 17 to detach from the mounting groove 16. Conversely, after the mounting block 17 is inserted into the mounting groove 16, rotating the fixing bolt 19 in the reverse direction can fix the sample dispensing needle 3 to the bottom of the turntable 11, realizing the quick replacement of the sample dispensing needle 3. It can also provide positioning when installing the sample dispensing needle 3, and cannot repeatedly perform alignment operations.

[0036] Working principle: The drive arm 2 drives the sampling needle body 3 to lift and translate to extract or inject liquid. After the sampling needle body 3 enters the cleaning tank, the micro motor 4 starts and drives the rotating shaft 5 to rotate, which in turn causes the turntable 11 to rotate the sampling needle body 3, shaking off the liquid remaining on the surface of the sampling needle. At the same time, the rotating shaft 5 drives the support shaft 8 to rotate through two sets of transmission wheels 6 and transmission belt 7. After the support shaft 8 rotates one revolution, the cam 10 protrusion contacts the surface of the turntable 11 and applies a squeezing force to the turntable 11. After being subjected to the force, the turntable 11 moves outward a certain distance, at which time the T-block 13 slides. Inside the T-slot 12, one set of springs 15 contracts under force, while another set of springs 15 stretches under force. When the cam 10 is not in contact with the surface of the turntable 11, the two sets of springs 15 quickly return to their original positions, allowing the turntable 11 to approach the cam 10 again. This enables the sampling needle to rotate and swing during cleaning in the cleaning tank, reducing surface liquid residue. After rinsing with clean water, the sampling needle is rotated and swinged in the cleaning tank following the above steps, which can shake off residual water, improve the cleanliness of the sampling needle, reduce the interference of residual liquid on subsequent samples or reagents, optimize the cleaning effect, and improve the accuracy and reliability of sampling.

[0037] 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 sample adding mechanism applied to a chemiluminescence detector, comprising a machine body (1), the surface of the machine body (1) is provided with a driving arm (2), the bottom of the driving arm (2) is provided with a sample adding needle body (3), characterized in that: The inner wall of the driving arm (2) is fixedly connected with a micro motor (4), the output end of the micro motor (4) is fixedly connected with a rotating shaft (5), the outer wall of the rotating shaft (5) is fixedly connected with a transmission wheel (6), the transmission wheel (6) is drivingly connected with a transmission belt (7), the inner wall of the driving arm (2) is fixedly connected with a support plate (9), the inner wall of the support plate (9) is rotatably connected with a support shaft (8), the bottom end of the support shaft (8) is fixedly connected with a cam (10), the side wall of the cam (10) is provided with a rotating disc (11), the top of the rotating disc (11) is provided with a T-shaped groove (12), the inner wall of the T-shaped groove (12) is slidingly connected with a T-shaped block (13), the inner wall of the T-shaped block (13) is fixedly connected with a sliding rod (14), the outer wall of the sliding rod (14) is sleeved with a spring (15).

2. The sample adding mechanism applied to the chemiluminescence detector according to claim 1, characterized in that: The bottom end of the rotating shaft (5) is fixedly connected with the top of the T-shaped block (13).

3. The sample adding mechanism applied to the chemiluminescence detector according to claim 1, characterized in that: The end of the sliding rod (14) is fixedly connected with the inner wall of the T-shaped groove (12).

4. The sample adding mechanism applied to the chemiluminescence detector according to claim 1, characterized in that: One end of the spring (15) is fixedly connected with the inner wall of the T-shaped groove (12), and the other end of the spring (15) is fixedly connected with the side wall of the T-shaped block (13).

5. The sample adding mechanism applied to the chemiluminescence measuring instrument according to claim 1, characterized in that: The bottom of the rotating disc (11) is provided with a mounting groove (16), the inner wall of the mounting groove (16) is provided with a mounting block (17), the inner wall of the mounting block (17) is provided with a threaded hole (18), and the inner wall of the threaded hole (18) is threadedly connected with a fixed bolt (19).

6. The sample adding mechanism applied to the chemiluminescence measuring instrument according to claim 5, characterized in that: The bottom of the mounting block (17) is fixedly connected with the top end of the sample adding needle body (3).

7. The sample adding mechanism applied to the chemiluminescence measuring instrument according to claim 5, characterized in that: The outer wall of the mounting block (17) is matched with the inner wall of the mounting groove (16).

8. The sample adding mechanism applied to the chemiluminescence measuring instrument according to claim 5, characterized in that: The outer wall of the fixed bolt (19) is threadedly connected with the inner wall of the rotating disc (11).

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