High-precision rapid microsyringe

Abstract

The utility model relates to the technical field of reagent injection, and discloses a high-precision rapid microsyringe, which comprises a mounting rack, a driving motor, a syringe and an electromagnetic valve, the syringe and the driving motor are respectively fixedly connected on two outer side walls of the mounting rack, the syringe comprises a syringe body and a piston rod, and the piston rod is fixedly connected on the mounting rack. The piston rod is arranged in a pipeline of the injector body, the two sides of the injector body are connected with the electromagnetic valve and the sampling needle respectively, and the piston rod is connected with the driving motor through a gear and rack transmission assembly arranged on the mounting frame; the driving motor drives the piston rod to move in the injector body through the gear and rack transmission assembly, and quantitative chemical reagents are sucked in or discharged out.

Description

Technical Field

[0001] The utility model relates to the technical field of reagent injection, in particular to a high-precision rapid micro-injector. Background Art

[0002] In various biochemical instruments and scientific instruments, it is often necessary to collect and add reagents.

[0003] Syringes are common medical devices that can be used in medical equipment, containers, and to extract reagents in experiments. The injection accuracy of existing syringes is difficult to control, and existing reagent syringes also have some defects during use. For example, when changing the injection reagent, if a different reagent needs to be added, it needs to be manually cleaned, and the cleaning is troublesome. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a high-precision fast micro-injector which is easy to self-clean and has a compact structure and is easy to operate.

[0005] The technical solution of the utility model is: a high-precision fast micro-injection syringe, comprising a mounting frame, a driving motor, a syringe and a solenoid valve, wherein the syringe and the driving motor are respectively fixedly connected to the two outer side walls of the mounting frame, the syringe comprises a syringe body and a piston rod, the piston rod is arranged in a pipeline of the syringe body, the two sides of the syringe body are respectively connected to the solenoid valve and the sampling needle, the piston rod is connected to the driving motor through a gear rack transmission assembly arranged on the mounting frame, and the driving motor drives the piston rod to move in the syringe body through the gear rack transmission assembly to realize the suction or discharge of quantitative chemical reagents.

[0006] It can be seen from the above scheme that the driving motor drives the piston rod to move up and down in the syringe body by driving the gear rack transmission to achieve reagent absorption and injection. The solenoid valve is used to control the water flow to achieve cleaning of the pipeline in the syringe body to avoid contamination between different reagents. The utility model integrates the syringe and the solenoid valve to achieve reagent absorption and injection as well as pipeline cleaning after absorption and injection. The gear rack assembly improves the transmission efficiency and injection accuracy, and has good stability.

[0007] The two sides of the syringe body are provided with a liquid inlet and a liquid outlet connected with the pipeline, the liquid inlet is connected with the solenoid valve, and the liquid outlet is connected with the sampling needle. It can be seen that the liquid inlet is used for water to flow into the syringe body from the liquid inlet, and the liquid outlet is used to connect with the sampling needle, which can not only drive the gear rack transmission assembly through the drive motor to realize the suction and injection of the reagent, but also realize the cleaning of the pipeline in the syringe through the solenoid valve.

[0008] The gear rack transmission assembly includes a slide rail, a slider slidingly matched on the slide rail, a gear, and a gear meshing with the gear, the gear is connected to the output end of the drive motor, the slide rail is connected to the inner wall of the mounting frame, the slide is fixedly connected to the gear rack through a mounting block, and the bottom end of the mounting block is connected to the piston rod through a connecting block. It can be seen that the sliding match between the slide and the slide rail realizes the stability of the up and down movement of the piston rod, thereby realizing high-precision control injection.

[0009] The mounting frame is provided with a mounting cavity, and the front and rear sides of the mounting cavity are respectively provided with a front side plate and a rear side plate, and one side of the mounting cavity is provided with an opening adapted to the solenoid valve, the gear rack transmission assembly is arranged in the mounting cavity, the syringe is fixedly connected to the front side plate, the drive motor is fixedly connected to the rear side plate, and the solenoid valve is installed at the opening. It can be seen that the drive motor, the syringe and the solenoid valve are all installed on the mounting frame, and the overall structure is compact and the space utilization rate is high.

[0010] The solenoid valve is provided with a water inlet and a water outlet, the water inlet is on the same side as the drive motor, the water outlet is on the same side as the syringe body, and the water outlet is connected to the liquid inlet through a connecting pipe. It can be seen that the solenoid valve is used to control the switch of the water flow, the water inlet is used to connect a water pipe to achieve water inlet, and the water outlet is connected to the liquid inlet on the syringe body to achieve water entry for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is an exploded view of the utility model;

[0013] Figure 3 It is a partial structural schematic diagram of the utility model;

[0014] Figure 4 is a cross-sectional view of a syringe. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0016] like Figures 1 to 4 As shown, the utility model is a high-precision fast micro-injector, comprising a mounting frame 1, a drive motor 2, a syringe 3 and a solenoid valve 4, the syringe body 31 and the drive motor 2 are respectively fixedly connected to the two outer side walls of the mounting frame 1, the syringe 3 comprises a syringe body 31 and a piston rod 32, the piston rod 32 is arranged in a pipeline 34 of the syringe body 31, the two sides of the syringe body 31 are respectively connected to the solenoid valve 4 and the sampling needle 33, the two sides of the syringe body 31 are provided with a liquid inlet pipe 35 and a liquid outlet pipe 36 connected to the pipeline 34, the liquid inlet pipe 35 is connected to the solenoid valve 4, the liquid outlet pipe 32 is connected to the sampling needle 33, the piston rod 32 is connected to the drive motor 2 through a gear rack transmission assembly 5 arranged on the mounting frame 1, the drive motor 2 drives the piston rod 32 to move in the syringe body 31 through the gear rack transmission assembly 5, so as to realize the suction or discharge of quantitative chemical reagents, and the solenoid valve 4 controls the water flow into the syringe 3 for pipeline cleaning.

[0017] In this embodiment, the pipeline 34 is connected to the liquid inlet 35 and the liquid outlet 36 symmetrically arranged on the syringe body 31, the sampling needle 33 is connected to the liquid outlet 36, and the drive motor 2 adopts a stepper motor with a 32-subdivision drive.

[0018] The rack and pinion transmission assembly 5 includes a slide rail 51, a slider 52 slidingly fitted on the slide rail 51, a gear 53 and a rack 54 meshing with the gear 53 for transmission, the gear 53 is connected to the output end of the drive motor 2, the slide rail 51 is connected to the inner wall of the mounting frame 1, the slider 52 is fixedly connected to the rack 54 through a mounting block 6, and the bottom end of the mounting block 6 is connected to the piston rod 32 through a connecting block 8.

[0019] The mounting frame 1 is provided with a mounting cavity 11, and a front side plate 12 and a rear side plate 13 are respectively provided on the front and rear sides of the mounting cavity 11. An opening 14 adapted to the solenoid valve 4 is provided on one side of the mounting cavity 11. The rack and pinion transmission assembly 5 is arranged in the mounting cavity 11, the syringe 3 is fixedly connected to the front side plate 12, the drive motor 2 is fixedly connected to the rear side plate 13, and the solenoid valve 4 is installed at the opening 14.

[0020] The solenoid valve 4 is provided with a water inlet pipe port 41 and a water outlet pipe port 42 . The water inlet pipe port 41 is on the same side as the driving motor 2 , and the water outlet pipe port 42 is on the same side as the syringe body 31 . The water outlet pipe port 42 is connected to the liquid inlet pipe port 35 via a connecting pipe 10 .

[0021] The working process of the utility model is as follows: when the syringe 3 is injecting, the solenoid valve 4 is in a closed state, and the driving motor 2 drives the gear 53 to rotate, and through the meshing transmission between the gear 53 and the rack 54, drives the mounting block 6 on the slider 52 to slide on the slide rail 51, so that the piston rod 32 drives the piston to slide upward in the syringe body 1, and the sampling needle 33 realizes quantitative reagent injection. When the syringe 3 is sucking, the solenoid valve 4 is in a closed state, and the driving motor 2 drives the piston rod 32 to move downward in the syringe body 1, and the reagent is sucked into the syringe body 1.

[0022] When the syringe body 1 is cleaning the pipeline 34, the solenoid valve is in an open state, and pressurized water flows into the pipeline 34 from the liquid inlet port 35 to achieve cleaning. The piston rod 32 is driven upward by the driving motor 2 to make the cleaning liquid flow through the liquid outlet port 36 and be discharged from the inner wall of the sampling needle 33, thereby playing the role of cleaning the pipeline, facilitating the cleaning of the pipeline 34 of the syringe 3 after the reagent is injected, and avoiding cross contamination between reagents.

[0023] Finally, it should be emphasized that the above is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-precision, fast micro-injector, comprising a mounting frame (1), a drive motor (2), an injector (3) and a solenoid valve (4), characterized in that: The syringe (3) and the drive motor (2) are respectively fixedly connected to the two outer side walls of the mounting frame (1); the syringe comprises a syringe body (31) and a piston rod (32); the piston rod (32) is arranged in a pipe (34) of the syringe body (31); the two sides of the syringe body (31) are respectively connected to the solenoid valve (4) and the sampling needle (33); the piston rod (32) is connected to the drive motor (2) through a gear rack transmission assembly (5) arranged on the mounting frame (1); the drive motor (2) drives the piston rod (32) to move in the syringe body (31) through the gear rack transmission assembly (5) to achieve the suction or discharge of quantitative chemical reagents.

2. The high-precision rapid micro-injector according to claim 1, characterized in that: A liquid inlet (35) and a liquid outlet (36) connected to the pipeline (34) are provided on both sides of the syringe body (31); the liquid inlet (35) is connected to the solenoid valve (4), and the liquid outlet (36) is connected to the sampling needle (33).

3. The high-precision rapid micro-injector according to claim 1, characterized in that: The gear rack transmission assembly (5) comprises a slide rail (51), a slider (52) slidably fitted on the slide rail (51), a gear (53) and a rack (54) meshing with the gear (53) for transmission, the gear (53) being connected to the output end of the drive motor (2), the slide rail (51) being connected to the inner wall of the mounting frame (1), the slider (52) being fixedly connected to the rack (54) via a mounting block (6), and the bottom end of the mounting block (6) being connected to the piston rod (32) via a connecting block (8).

4. The high-precision rapid micro-injector according to claim 1, characterized in that: The mounting frame (1) is provided with a mounting cavity (11), and a front side plate (12) and a rear side plate (13) are respectively provided on the front and rear sides of the mounting cavity (11), and an opening (14) adapted to the solenoid valve (4) is provided on one side of the mounting cavity (11), the rack and pinion transmission assembly (5) is arranged in the mounting cavity (11), the syringe (3) is fixedly connected to the front side plate (12), the drive motor (2) is fixedly connected to the rear side plate (13), and the solenoid valve (4) is installed at the opening (14).

5. The high-precision rapid micro-injector according to claim 2, characterized in that: The solenoid valve (4) is provided with a water inlet pipe port (41) and a water outlet pipe port (42); the water inlet pipe port (41) is on the same side as the drive motor (2), the water outlet pipe port (42) is on the same side as the syringe body (31), and the water outlet pipe port (42) is connected to the liquid inlet pipe port (35) via a connecting pipe (10).

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