A micro-sampler for testing

Abstract

The utility model discloses a kind of inspection microsampler, including the suction head push ring tube being arranged at the bottom end of main body, the bottom end of the suction head push ring tube is provided with suction head, the engagement of the suction head and suction head push ring tube is provided with reinforcing component, the reinforcing component is composed of fixed seat, fixed component of symmetrical arrangement;Through the reinforcing component of design, improve the original suction head and the way of only through single engagement between suction head push ring tube is connected, there is not enough sealing between suction head and suction head push ring tube, and when using process to suction head touch, the phenomenon of the looseness between the two, so that the gap between suction head and suction head push ring tube is generated, the problem of affecting normal sampling, by setting reinforcing component between suction head and suction head push ring tube, so that the connection mode after optimization can significantly reduce the risk of liquid leakage, ensure the accuracy of pipetting volume, reduce the possibility of suction head loosening, falling in pipetting process.

Description

Technical Field

[0001] This utility model belongs to the field of sampling and testing technology, specifically relating to a micro sampler for testing. Background Technology

[0002] Testing micro samplers is a crucial step in ensuring their sampling accuracy and precision, especially in fields with extremely high requirements for micro-scale operations, such as scientific research, medical treatment, and chemical analysis.

[0003] Existing micro-samplers for testing rely on an operating button to push an internal piston upwards, creating negative pressure inside the sampler chamber to draw liquid into the pipette tip. The pipette tip and tip extension ring are connected only by a snap-fit ​​mechanism. If the seal between them is poor, outside air can enter the chamber through gaps during the liquid aspiration process, reducing the internal negative pressure. As a result, the actual amount of liquid aspirated will be less than the set amount. Furthermore, after the liquid aspiration is completed, the unstable internal and external pressure difference may cause the aspirated liquid to leak out through the gaps, resulting in leakage. To address these issues, this invention proposes a new micro-sampler for testing. Utility Model Content

[0004] The purpose of this invention is to provide a micro sampler for testing, so as to solve the problem of insufficient sealing caused by the connection between the pipette tip and the pipette tip ejection ring tube being only connected by a snap-fit ​​method as mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a micro sampler for testing, comprising a suction head ejection ring tube disposed at the bottom of the main body, wherein a suction head is disposed at the bottom end of the suction head ejection ring tube, and a reinforcing component is disposed at the engagement point between the suction head and the suction head ejection ring tube, the reinforcing component consisting of a fixing seat and symmetrically arranged fixing components, wherein the fixing seat is sleeved and fixed to the bottom end surface of the suction head ejection ring tube, and the fixing components are disposed at the connection point between the side of the fixing seat and the side of the suction head.

[0006] Preferably, the outer surface of the fixing base is at the same level as the top outer surface of the suction head.

[0007] Preferably, the fixing component consists of a limiting block, a limiting groove, a slot, and a connecting component. The limiting groove is formed at the top side edge of the suction head, the slot is formed on the side of the fixing base, the limiting block is disposed inside the limiting groove and the slot, and the connecting component is disposed at the connection between the limiting block and the slot.

[0008] Preferably, the side cross-section of the limiting block has an L-shaped structure.

[0009] Preferably, the surface of the limiting block is in contact with the inner wall of the card slot and the inner wall of the limiting groove.

[0010] Preferably, the connecting assembly consists of a crossbar, a torsion spring, and a through hole. The through hole is opened inside the limiting block, the crossbar is disposed inside the through hole, and both ends of the crossbar are fixed to the inner walls of the slot, respectively. The torsion spring is sleeved on the surface of the through hole, and both ends of the torsion spring are fixed to the inner walls of the crossbar, respectively.

[0011] Preferably, the inner side of the card slot is provided with an inclined groove.

[0012] Preferably, a piston is provided inside the main body, a transmission mechanism is provided inside the main body, the transmission mechanism is connected to the operation button, a display window is provided on the surface of the main body, and an operation button is provided on the top of the main body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] By designing a reinforced component, the original method of connecting the pipette tip and the tip ejection ring through a single snap-fit ​​connection was improved. This resulted in insufficient sealing between the pipette tip and the tip ejection ring, and gaps were created between the two when the pipette tip was touched during use, affecting normal sampling. By setting a reinforced component between the pipette tip and the tip ejection ring, the optimized connection method significantly reduces the risk of liquid leakage, ensures the accuracy of pipetting volume, and reduces the possibility of the pipette tip loosening or falling off during pipetting. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This utility model Figure 1 Enlarged schematic diagram of region A in the image;

[0017] Figure 3 This is a cross-sectional view of the suction head ejection ring tube and the suction head mounting point of this utility model.

[0018] Figure 4 This utility model Figure 3 Enlarged schematic diagram of region B in the diagram;

[0019] Figure 5 This is a schematic diagram of the connecting component structure of this utility model;

[0020] In the diagram: 1. Main body; 2. Operation button; 3. Suction head; 31. Fixing base; 32. Fixing component; 320. Limiting block; 321. Limiting groove; 322. Card slot; 323. Connecting component; 3231. Crossbar; 3232. Torsion spring; 3233. Through hole; 324. Inclined groove; 4. Suction head ejection ring tube; 5. Display window. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1 to 5This utility model provides a technical solution: a micro sampler for testing, including a suction head ejection ring tube 4 disposed at the bottom of the main body 1, a suction head 3 disposed at the bottom of the suction head ejection ring tube 4, and a reinforcing component disposed at the engagement point between the suction head 3 and the suction head ejection ring tube 4. The reinforcing component consists of a fixing seat 31 and symmetrically arranged fixing components 32. The fixing seat 31 is sleeved and fixed to the bottom surface of the suction head ejection ring tube 4, and the fixing components 32 are disposed at the connection point between the side of the fixing seat 31 and the side of the suction head 3. Through the designed reinforcing component, the problem of insufficient sealing between the suction head 3 and the suction head ejection ring tube 4 due to the original connection only being a single engagement method, and the loosening of the connection between the two when the suction head 3 is touched during use, is improved. When the pipette tip 3 and the pipette tip ejection ring tube 4 are connected, a gap may appear between them, affecting normal sampling. By adding a reinforcing component between the pipette tip 3 and the pipette tip ejection ring tube 4, the optimized connection method significantly reduces the risk of liquid leakage, ensures the accuracy of the pipetting volume, and reduces the possibility of the pipette tip loosening or falling off during pipetting. The outer surface of the fixing base 31 is flush with the top outer surface of the pipette tip 3. The fixing component 32 consists of a limiting block 320, a limiting groove 321, a retaining groove 322, and a connecting component 323. The limiting groove 321 is located at the top side edge of the pipette tip 3, the retaining groove 322 is located on the side of the fixing base 31, the limiting block 320 is located inside the limiting groove 321 and the retaining groove 322, and the connecting component 323 is located on the side edge of the fixing base 31. At the connection between the limiting block 320 and the slot 322, during the installation of the suction head ejection ring tube 4 and the suction head 3, the tops of the symmetrically arranged limiting blocks 320 at the connection are pressed simultaneously, causing the limiting blocks 320 to flip outwards around the through crossbar 3231, resulting in a tilted state. This separates the limiting blocks 320 from the limiting slot 321 and causes the torsion spring 3232 to deform. Then, the suction head 3 and the suction head ejection ring tube 4 are properly engaged, and the limiting blocks 320 are simultaneously released. Under the action of the torsion spring 3232, the position of the limiting blocks 320 is restored, and the bottom end of the limiting blocks 320 is inserted into the inner side of the limiting slot 321. This fixes the suction head 3 and the suction head ejection ring tube 4 in place after engagement, providing further reinforcement. The side of the limiting block 320... The cross-section is L-shaped. The surface of the limiting block 320 is in contact with the inner wall of the slot 322 and the inner wall of the limiting groove 321. The connecting component 323 consists of a crossbar 3231, a torsion spring 3232, and a through hole 3233. The through hole 3233 is opened on the inner side of the limiting block 320. The crossbar 3231 is set on the inner side of the through hole 3233. The two ends of the crossbar 3231 are fixed to the two sides of the inner wall of the slot 322 respectively. The torsion spring 3232 is sleeved on the surface of the through hole 3233. The two ends of the torsion spring 3232 are fixed to the two sides of the inner wall of the crossbar 3231 respectively. A piston is set inside the main body 1. A transmission mechanism is set inside the main body 1. The transmission mechanism is connected to the operation button 2. A display window 5 is set on the surface of the main body 1. An operation button 2 is set on the top of the main body 1.

[0023] In this embodiment, preferably, an inclined groove 324 is provided on the inner side of the slot 322, which ensures that the top of the limiting block 320 is not blocked when pressed.

[0024] The working principle and usage procedure of this utility model are as follows: Select a micro-sampler with an appropriate range according to the required volume of liquid to be transferred, and match it with a pipette tip 3 of the corresponding specification. Tightly fit the pipette tip 3 onto the pipette tip extension ring 4 of the micro-sampler, ensuring a secure and well-sealed installation to prevent air leakage from affecting the pipetting accuracy. Then, by rotating the operation button 2 of the micro-sampler, set the required liquid volume. The operation button 2 will drive the internal transmission mechanism, changing the initial position of the piston, thereby determining the volume of the micro-sampler cavity. Finally, hold the micro-sampler vertically with your thumb... Press operation button 2. At this time, the piston inside the micro sampler moves upward, the volume of the chamber increases, and a negative pressure is formed. Immerse the pipette tip 3 below the liquid surface, and slowly release operation button 2. The liquid is drawn into the pipette tip 3 under atmospheric pressure. Then move the micro sampler with the liquid above the target container, maintain a certain vertical distance, and press operation button 2 with your thumb to discharge most of the liquid. In the entire liquid transfer process, the volume of the micro sampler chamber is changed by precisely controlling the movement of the piston. Atmospheric pressure is used to realize the suction and discharge of the liquid, thereby achieving the purpose of accurate liquid transfer.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test micro-sampler comprising a pusher ring (4) arranged at the bottom end of a body (1), characterized in that: The bottom end of the suction head ejection ring tube (4) is provided with a suction head (3). A reinforcing component is provided at the engagement point between the suction head (3) and the suction head ejection ring tube (4). The reinforcing component consists of a fixing seat (31) and symmetrically arranged fixing components (32). The fixing seat (31) is sleeved and fixed to the bottom surface of the suction head ejection ring tube (4). The fixing components (32) are located at the connection point between the side of the fixing seat (31) and the side of the suction head (3).

2. A micro-sampler according to claim 1, wherein: The outer surface of the fixed base (31) is at the same level as the top outer surface of the suction head (3).

3. A micro-sampler according to claim 1, wherein: The fixing component (32) consists of a limiting block (320), a limiting groove (321), a slot (322), and a connecting component (323). The limiting groove (321) is located at the top side edge of the suction head (3), the slot (322) is located on the side of the fixing base (31), the limiting block (320) is located inside the limiting groove (321) and the slot (322), and the connecting component (323) is located at the connection between the limiting block (320) and the slot (322).

4. A micro-sampler according to claim 3, wherein: The side cross-section of the limiting block (320) has an L-shaped structure.

5. A micro sampler for testing according to claim 3, characterized in that: The surface of the limiting block (320) is in contact with the inner wall of the slot (322) and the inner wall of the limiting groove (321).

6. A micro sampler for testing according to claim 3, characterized in that: The connecting assembly (323) consists of a crossbar (3231), a torsion spring (3232), and a through hole (3233). The through hole (3233) is opened inside the limiting block (320). The crossbar (3231) is located inside the through hole (3233). The two ends of the crossbar (3231) are fixed to the inner walls of the slot (322) respectively. The torsion spring (3232) is sleeved on the surface of the through hole (3233). The two ends of the torsion spring (3232) are fixed to the inner walls of the crossbar (3231) respectively.

7. A micro sampler for testing according to claim 3, characterized in that: An inclined groove (324) is provided on the inner side of the card slot (322).

8. A micro sampler for testing according to claim 1, characterized in that: The main body (1) is equipped with a piston inside, and a transmission mechanism is provided inside the main body (1). The transmission mechanism is connected to the operation button (2). The surface of the main body (1) is equipped with a display window (5), and the top of the main body (1) is equipped with an operation button (2).

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