Manual sampling mechanism for electrolyte analyzer

Abstract

The utility model discloses a manual sampling mechanism for an electrolyte analyzer, the manual sampling mechanism comprises a main support, a sampling needle assembly, a gear rack transmission component and a rotary locking mechanism, the gear rack transmission component and the rotary locking mechanism are respectively arranged on the main support, the sampling needle assembly is connected with the gear rack transmission component, and the rotary locking mechanism is connected with the main support. And the rotary locking mechanism is connected with the gear rack transmission component. The manual sampling mechanism for the electrolyte analyzer is simple in structure, stable in performance and reliable in operation, particularly, the sampling mechanism can be self-locked in the working state and the opening state, the manual sampling mechanism adopts a gear, rack and sliding rail structure, the structure is simple, the assembly precision is not high, the assembly and debugging workload is reduced, the assembly efficiency is improved, and the production cost is reduced. The labor cost is reduced; in addition, gears and racks are compact in structural layout, and the overall size of the mechanism is small.

Description

Technical Field

[0001] This utility model discloses an automatic sampling mechanism, and more particularly a manual sampling mechanism for an electrolyte analyzer, belonging to the technical field of biochemical analysis equipment. Background Technology

[0002] Biochemical analysis equipment is used to detect and analyze biochemical substances, providing information for clinical diagnosis, treatment, prognosis, and health status. Electrolyte analyzers are an important type of biochemical analysis equipment. They are used to measure the electrolyte content in samples such as whole blood, plasma, serum, and urine, primarily detecting indicators such as potassium ions, sodium ions, chloride ions, ionized calcium, pH value, and bicarbonate.

[0003] Biochemical analysis equipment, especially electrolyte analyzers, cannot function without sampling mechanisms. Reasonable sampling methods and techniques can ensure the representativeness and consistency of samples, thereby providing accurate and reliable biochemical analysis results.

[0004] Sampling mechanisms used in electrolyte analyzers are mainly divided into fully automatic and manual sampling mechanisms. The fully automatic sampling mechanism mainly consists of a servo motor, synchronous belt, splined shaft or screw pair, fixed frame, etc. It has a complex structure, high assembly requirements, and extremely high cost. The manual sampling mechanism mainly consists of a rotating shaft, telescopic spring, linkage mechanism, and sampling needle mechanism. It mainly relies on the stretching and contraction of the telescopic spring to move the sampling needle up and down. Because the stress of the telescopic spring is concentrated, it is easy to deform, which causes the sampling needle mechanism to loosen when it is raised and pressed down, and cannot be locked, affecting sample sampling. Summary of the Invention

[0005] To address the shortcomings of existing manual sampling mechanisms in electrolyte analyzers, which rely primarily on the stretching and contraction of a telescopic spring to move the sampling needle up and down, and are prone to deformation due to stress concentration in the spring, this invention provides a manual sampling mechanism for electrolyte analyzers.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a manual sampling mechanism for an electrolyte analyzer. The manual sampling mechanism includes a main support, a sampling needle assembly, a gear and rack transmission component, and a rotary locking mechanism. The gear and rack transmission component and the rotary locking mechanism are respectively installed on the main support. The sampling needle assembly is connected to the gear and rack transmission component, and the rotary locking mechanism is connected to the gear and rack transmission component.

[0007] The technical solution adopted by this utility model to solve its technical problem further includes:

[0008] The sampling needle assembly includes a sampling needle and a fixing sleeve, which are fixedly installed together. A groove is provided on the gear and rack transmission component, and the fixing sleeve is fixedly embedded in the groove on the gear and rack transmission component.

[0009] The gear and rack transmission component includes a gear shaft and a sliding rack. The sliding rack and the gear shaft have the same module and mesh together. The sliding rack has protrusions fixed on one or both sides. A slide rail is provided on the main support. The protrusions on the sliding rack are embedded in the slide rails on one or both sides of the main support.

[0010] The slide rail is a combination groove consisting of a straight line and an arc.

[0011] The gear and rack transmission component includes a rotating handle, with both sides of the gear shaft fixedly connected to the rotating handle.

[0012] A photoelectric sensor is fixedly installed on the main support, and an arc-shaped light-blocking strip is fixedly installed on the gear shaft. The photoelectric sensor is set corresponding to the arc-shaped light-blocking strip on the gear shaft.

[0013] The rotary locking mechanism includes a pull rod, a compression spring, and a fixed rotating shaft. The gear shaft has a protrusion with a mounting hole. One end of the pull rod is fitted into the mounting hole at the protrusion on the gear shaft. The fixed rotating shaft is fixedly mounted on the main bracket and has a through hole. The other end of the pull rod is inserted into the through hole in the middle of the fixed rotating shaft. The compression spring is fitted onto the pull rod, with one end abutting against the protrusion on the gear shaft and the other end abutting against the fixed rotating shaft.

[0014] The main support is fixedly provided with a limiting post, which is set corresponding to the protrusion on the gear shaft.

[0015] A liquid circuit connector is fixedly installed on the main support, and the liquid circuit connector is correspondingly set with the sampling needle assembly.

[0016] The fluid circuit connector includes an upper cover, a fixed bracket, a rubber connector, and a lower cover. The upper cover and the lower cover are fixed together by a snap fastener. The rubber connector is located between the upper cover and the lower cover. A small protruding cylinder is fixed inside the lower cover. The rubber connector has a small hole in the middle. One end of the fixed bracket is connected to the upper cover, and the other end of the fixed bracket is fixedly installed on the main brackets on both sides.

[0017] The beneficial effects of this utility model are: the manual sampling mechanism for electrolyte analyzers in this utility model has a simple structure, stable performance, and reliable operation. In particular, the sampling mechanism can be self-locking in both working and open states. This utility model adopts a gear, rack, and slide rail structure, which is simple in structure, has low assembly precision, reduces the workload of assembly and debugging, improves assembly efficiency, and reduces labor costs. In addition, the gear and rack structure has a compact layout, and the overall size of the mechanism is small.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the sampling mechanism of this utility model.

[0021] Figure 3 This is a schematic diagram of the vertically downward locking structure of the sampling needle in this utility model.

[0022] Figure 4 This is a schematic diagram of the sampling needle lifting and rotating structure in this utility model.

[0023] Figure 5 This is a schematic cross-sectional view of the fluid circuit connector in this utility model.

[0024] In the diagram, 1-liquid circuit connector, 2-sampling needle, 3-sliding rack, 4-rotating handle, 5-gear shaft, 6-pull rod, 7-compression spring, 8-fixed rotating shaft, 9-sliding guide rail, 10-photoelectric sensor, 11-rubber connector, 12-lower cover, 13-upper cover, 14-fixed bracket, 15-main bracket, 16-protrusion, 17-fixed sleeve, 18-limiting post, 19-arc-shaped light-blocking strip. Detailed Implementation

[0025] This embodiment is a preferred embodiment of the present invention. All other embodiments that are the same as or similar to this embodiment in principle and basic structure are within the protection scope of the present invention.

[0026] Please refer to the appendix for details. Figure 1 To be continued Figure 5 This utility model mainly protects a manual sampling mechanism for an electrolyte analyzer. It is used on an electrolyte analyzer for manual sampling. The manual sampling mechanism mainly includes a main support 15, a sampling needle assembly, a gear and rack transmission component, and a rotation locking mechanism. The gear and rack transmission component and the rotation locking mechanism are respectively installed on the main support 15. The sampling needle assembly is connected to the gear and rack transmission component, which has lifting and rotating functions. The rotation locking mechanism is connected to the gear and rack transmission component.

[0027] In this embodiment, the bottom end of the sampling needle assembly is connected to the liquid circuit connector 1 for drawing reagent samples from the host. The top of the sampling needle assembly is connected to a gear and rack transmission component with lifting and rotating functions for driving the sampling needle assembly to lift and lower through the gear and rack transmission component.

[0028] In this embodiment, the sampling needle assembly mainly includes a sampling needle 2 and a fixing sleeve 17. The sampling needle 2 and the fixing sleeve 17 are fixedly installed together. The fixing sleeve 17 is fixedly embedded in the groove on the sliding rack 3 and can rotate with the sliding rack 3.

[0029] In this embodiment, the gear and rack transmission component mainly includes a gear shaft 5 and a sliding rack 3. The sliding rack 3 and the gear shaft 5 have the same module. The gear shaft 5 and the sliding rack 3 mesh together (also referred to as engagement). The sliding rack 3 has protrusions 16 fixed on one or both sides. A slide rail 9 is provided on the main support 15. The protrusions 16 on the sliding rack 3 are embedded in the slide rail 9 on one or both sides of the main support 15 (or cover plate). In this embodiment, the slide rail 9 is a combination groove of a straight line and an arc. The sliding rack 3 completes linear and rotational movement in the groove, thereby realizing the up and down movement and rotational lifting of the sampling needle 2. When the sampling needle 2 descends to a certain position, it connects with the liquid circuit connector 1. The sampling needle 2 is lifted and rotated to a fixed position, and the sampling needle 2 can draw up the reagent sample, thereby realizing the liquid circuit flow of the reagent sample into the analysis system.

[0030] In this embodiment, the gear and rack transmission component also includes a rotating handle 4. The two sides of the gear shaft 5 are fixedly connected to the rotating handle 4, and the gear shaft 5 can be rotated by rotating the handle 4.

[0031] In this embodiment, the rotary locking mechanism includes a pull rod 6, a compression spring 7, and a fixed rotating shaft 8. The gear shaft 5 has a protrusion with a mounting hole. One end of the pull rod 6 is fitted into the mounting hole at the protrusion on the gear shaft 5. The fixed rotating shaft 8 is fixedly mounted on the main support 15 and has a through hole. The other end of the pull rod 6 passes through the through hole in the middle of the fixed rotating shaft 8. The compression spring 7 is fitted onto the pull rod 6, with one end abutting against the protrusion on the gear shaft 5 and the other end abutting against the fixed rotating shaft 8. When the gear shaft 5, pull rod 6, and fixed rotating shaft 8 are aligned, the device is in a balanced state. Rotating the gear shaft 5 to a fixed position disrupts this balance, causing the compression spring 7 in the pull rod 6 to recover its stress and press against the protrusion on the gear shaft 5, thus locking the gear shaft 5. This sampling mechanism has a simple overall structure, requires no high assembly precision, and greatly reduces labor costs.

[0032] In this embodiment, the liquid circuit connector 1 mainly includes an upper cover 13, a fixed bracket 14, a rubber connector 11, and a lower cover 12. The upper cover 13 and the lower cover 12 are fixed together by snap-fit. The upper cover 13 and the lower cover 12 are connected to the fixed bracket 14 and can move axially and radially. The rubber connector 11 is disposed between the upper cover 13 and the lower cover 12. A small protruding cylinder is fixedly provided inside the lower cover 12. The rubber connector 11 has a small hole in the middle and is inserted into the small protruding cylinder of the lower cover 12 by interference fit. This mechanism not only ensures that the small hole in the middle forms a whole, but also plays a buffering and sealing role after the sampling needle 2 is inserted to prevent reagent liquid from overflowing. One end of the fixed bracket 14 is connected to the upper cover 13, and the other end of the fixed bracket 14 is fixedly installed on the two main brackets 15 (i.e., cover plates). The above-mentioned components are compact in structure, small in size, and easy to install.

[0033] In this embodiment, a photoelectric sensor 10 is also fixedly installed on the main support 15, and an arc-shaped light-blocking strip 19 is fixedly provided on the gear shaft 5. The photoelectric sensor 10 is set corresponding to the arc-shaped light-blocking strip 19 on the gear shaft 5 and can be used to detect the angle of the gear shaft 5.

[0034] Please refer to the appendix for details. Figure 3 , Figure 3 The diagram shows the sampling needle mechanism in the present invention in a vertically downward locked state. When the handle 4 is rotated to the position shown in the diagram, the gear shaft 5 rotates, causing the sliding rack 3 to move downward through the sliding track 9, so that the sampling needle 2 connected to it is inserted into the liquid circuit connector 1. At this time, the entire liquid circuit forms a closed loop. At the same time, under the action of the compression spring 7, the gear shaft 5 is pressed against the protrusion on the gear shaft 5 by the compression spring 7 to prevent the sampling needle 2 from lifting upward. Meanwhile, the upper part of the protrusion on the gear shaft 5 is pressed against the limiting post 18 on the side plate to keep the sampling needle 2 stable, thereby forming a locking structure.

[0035] Please refer to the appendix for details. Figure 4 , Figure 4 The diagram shows the sampling needle mechanism in the lifted and rotated state of this invention. When the handle 4 is rotated to the position shown, the gear shaft 5 rotates, causing the sliding rack 3 to move upward through the sliding rail 9, disengaging the sampling needle 2 connected to it from the liquid circuit connector 1. After moving upward a certain distance, the sliding rack 3 enters the arc section of the sliding rail 9, causing the sampling needle 2 to rotate and lift, facilitating reagent sampling. When the sliding rack 3 rises to the top of the sliding rail 9, the protrusions 16 on both sides are blocked by the inner side of the sliding rail 9. At the same time, the gear shaft 5 is pushed upward by the compression spring 7, preventing the sliding rack 3 from descending, thus forming a locking structure for the rotating and lifting of the sampling needle 2.

[0036] The manual sampling mechanism for an electrolyte analyzer in this invention has a simple structure, stable performance, and reliable operation. In particular, the sampling mechanism can self-lock in both working and open states. This invention adopts a gear, rack, and slide rail structure, which is simple in structure and has low assembly precision, reducing the workload of assembly and debugging, improving assembly efficiency, and reducing labor costs. In addition, the gear and rack structure has a compact layout, and the overall size of the mechanism is small.

Claims

1. A hand sampling mechanism for an electrolyte analyzer characterized by: The manual sampling mechanism comprises a main support (15), a sampling needle assembly, a gear and rack transmission member and a rotation locking mechanism, the gear and rack transmission member and the rotation locking mechanism are respectively installed on the main support (15), the sampling needle assembly is connected with the gear and rack transmission member, and the rotation locking mechanism is connected with the gear and rack transmission member.

2. The manual sampling mechanism for an electrolyte analyzer of claim 1, characterized by: The sampling needle assembly comprises a sampling needle (2) and a fixing sleeve (17), the sampling needle (2) and the fixing sleeve (17) are fixedly installed together, a groove is formed in the gear and rack transmission member, and the fixing sleeve (17) is fixedly embedded in the groove on the gear and rack transmission member.

3. The manual sampling mechanism for an electrolyte analyzer of claim 1, characterized by: The gear and rack transmission member comprises a gear shaft (5) and a sliding rack (3), the sliding rack (3) and the gear shaft (5) have the same modulus, the gear shaft (5) and the sliding rack (3) are engaged with each other, and one side or both sides of the sliding rack (3) is fixedly provided with a protrusion (16), a sliding rail (9) is formed in the main support (15), and the protrusion (16) on the sliding rack (3) is embedded in the sliding rail (9) on one side or both sides of the main support (15).

4. The manual sampling mechanism for an electrolyte analyzer of claim 3, characterized by: The sliding rail (9) is a combined groove of a straight line and a circular arc.

5. The manual sampling mechanism for an electrolyte analyzer of claim 3, characterized by: The gear and rack transmission member comprises a rotating handle (4), and the gear shaft (5) is fixedly connected with the rotating handle (4) on both sides.

6. The manual sampling mechanism for an electrolyte analyzer of claim 3, characterized by: The main support (15) is fixedly provided with a photoelectric sensor (10), the gear shaft (5) is fixedly provided with an arc-shaped light barrier (19), and the photoelectric sensor (10) is arranged correspondingly to the arc-shaped light barrier (19) on the gear shaft (5).

7. The manual sampling mechanism for an electrolyte analyzer of claim 1, characterized by: The rotation locking mechanism comprises a pull rod (6), a compression spring (7) and a fixed rotating shaft (8), the gear shaft (5) is provided with a protruding position, the protruding position is provided with a mounting hole, one end of the pull rod (6) is sleeved in the mounting hole at the protruding position on the gear shaft (5), the fixed rotating shaft (8) is fixedly installed on the main support (15), the fixed rotating shaft (8) is provided with a through hole, the other end of the pull rod (6) is inserted into the through hole in the middle of the fixed rotating shaft (8), the compression spring (7) is sleeved on the pull rod (6), one end of the compression spring (7) abuts against the protruding position on the gear shaft (5), and the other end of the compression spring (7) abuts against the fixed rotating shaft (8).

8. The manual sampling mechanism for an electrolyte analyzer of claim 7, characterized by: The main support (15) is fixedly provided with a limiting column (18), and the limiting column (18) is arranged correspondingly to the protruding position on the gear shaft (5).

9. The manual sampling mechanism for an electrolyte analyzer of claim 1, characterized by: The main support (15) is fixedly provided with a liquid path adapter (1), and the liquid path adapter (1) is arranged correspondingly to the sampling needle assembly.

10. The manual sampling mechanism for an electrolyte analyzer of claim 9, characterized by: The liquid path adapter (1) comprises an upper cover (13), a fixed support (14), a rubber connecting piece (11) and a lower cover (12), the upper cover (13) and the lower cover (12) are fixedly installed together through buckling, the rubber connecting piece (11) is arranged between the upper cover (13) and the lower cover (12), the lower cover (12) is fixedly provided with a protruding small cylinder, the rubber connecting piece (11) is provided with a small hole in the middle, one end of the fixed support (14) is connected with the upper cover (13), and the other end of the fixed support (14) is fixedly installed on the main support (15) on both sides.

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