Flexible test tube pressing device

Through the design of a flexible clamping device, using motor drive and flexible buffer pressure blocks, the instability problem of capped test tubes during puncture and sample aspiration is solved, the stability of the test tubes in the sample rack is ensured, damage to the puncture needle is avoided, and the complexity and cost of the device are reduced.

CN120754927APending Publication Date: 2025-10-10SHANGHAI I-READER BIOTECH CO LTD
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Patent Information

Application Number
CN202510657905.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-21
Publication Date
2025-10-10

AI Technical Summary

Technical Problem

In the prior art, capped test tubes are easily lifted up during puncture and sampling, resulting in instability and possibly damaging the puncture and sampling needle. In addition, traditional rigid clamping devices are costly and complex.

Method used

A flexible pressing device is adopted, including a driving unit, a guide unit and a pressing unit. The motor, the screw nut and the flexible buffer pressing block are used to achieve flexible pressing through the elastic deformation of the spring to avoid damage to the test tube.

Benefits of technology

The stable compression of the test tube in the sample holder is achieved, damage to the puncture needle is avoided, the risk of damage to the test tube is reduced, and the displacement control requirements are simplified.

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Abstract

The invention discloses a flexible pressing device for a test tube. The flexible pressing device comprises a driving unit, a guiding unit and a pressing unit, the driving unit comprises a pressing plate mounting seat and a supporting plate for supporting the interior of the pressing plate mounting seat, and the supporting plate can move up and down; the guide unit comprises a base, a guide rod connecting block, a guide shaft, a compression spring and a spring sleeve shaft; the guide shaft is vertically mounted on the base, the guide rod connecting block and the pressing plate mounting seat are arranged on the guide shaft in a sleeving manner, and the guide rod connecting block is arranged above the pressing plate mounting seat; the pressing plate mounting seat is also arranged on the spring sleeve shaft in a sleeving manner; the lower end of the spring sleeve shaft is connected with the supporting plate, and the upper end of the spring sleeve shaft is connected with the guide rod connecting block; the compression spring is arranged on the spring sleeve shaft in a sleeving mode, and the upper end and the lower end of the compression spring abut against the portion between the guide rod connecting block and the pressing plate installation base. The pressing unit comprises a pressing plate, and the pressing plate is connected with the pressing plate mounting base. According to the invention, flexible compression of the test tube needing puncture and sample suction can be realized.
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Description

Technical Field

[0001] The invention belongs to the field of compression technology, and in particular relates to a flexible compression device for test tubes. Background Art

[0002] One type of sample rack is in close contact with capped test tubes. When a capped tube is punctured and aspirated, the friction between the cap and the puncture needle causes the tube to rise to a certain height and become unable to return naturally. When the lifted tube needs to be inserted into another testing instrument for further puncture and aspiration, the unstable tube can cause significant damage to the aspiration needle.

[0003] Therefore, it is necessary to press the unstable test tube to stabilize its position in the sample rack.

[0004] Traditional rigid clamping devices must ensure both clamping reliability and no damage to the compressed test tubes. This places extremely high demands on the displacement control of the clamping device, or requires the introduction of force feedback control, which will greatly increase the cost and complexity of the clamping device. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art and provide a flexible test tube pressing device, which can realize the flexible pressing of test tubes that need to be punctured and aspirated, ensure the unique stability of the test tube in the sample rack, and avoid the puncture needle from being bent and damaged during the puncture process.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a test tube flexible pressing device, comprising a driving unit, a guiding unit and a pressing unit;

[0007] The driving unit includes a pressure plate mounting seat and a supporting plate for supporting the interior of the pressure plate mounting seat, and the supporting plate can move up and down;

[0008] The guide unit includes a base, a guide rod connecting block, a guide shaft, a compression spring and a spring sleeve shaft; the guide shaft is vertically mounted on the base, the guide rod connecting block and the pressure plate mounting seat are both sleeved on the guide shaft, and the guide rod connecting block is above the pressure plate mounting seat;

[0009] The pressure plate mounting seat is also sleeved on the spring sleeve shaft; the lower end of the spring sleeve shaft is connected to the supporting plate, and the upper end of the spring sleeve shaft is connected to the guide rod connecting block; the compression spring is sleeved on the spring sleeve shaft, and the upper and lower ends of the compression spring are respectively supported between the guide rod connecting block and the pressure plate mounting seat;

[0010] The pressing unit includes a pressing plate, which is connected to a pressing plate mounting seat.

[0011] The above-mentioned test tube flexible pressing device, the driving unit also includes a motor, a screw nut and a screw nut fixing seat; the motor is mounted on the support plate, and the output shaft of the motor has a screw structure;

[0012] The nut fixing seat is installed on the base, and the screw nut is fixed on the nut fixing seat;

[0013] The screw structure and screw nut of the motor output shaft are installed in coordination.

[0014] The above-mentioned test tube flexible pressing device has a flexible buffer pressing block installed on the bottom surface of the pressing plate.

[0015] The above-mentioned test tube flexible pressing device has a downward pressing optical coupler baffle installed on the pressure plate mounting seat, and a downward pressing detection optical coupler used in conjunction with the downward pressing optical coupler baffle is installed on the base, and the downward pressing optical coupler baffle is above the downward pressing detection optical coupler.

[0016] In the above-mentioned test tube flexible pressing device, the installation position of the downward pressing optical coupler baffle on the pressure plate mounting seat can be adjusted up and down.

[0017] In the above-mentioned test tube flexible pressing device, a guide rod limit baffle is installed at the upper end of the guide shaft, and the guide rod limit baffle is used to limit the guide rod connecting block from separating from the guide shaft.

[0018] In the above-mentioned test tube flexible pressing device, a first bearing is installed on the guide rod connecting block, and the first bearing is sleeved on the guide shaft.

[0019] In the above-mentioned test tube flexible pressing device, a second bearing is installed on the pressure plate mounting seat, and the second bearing is sleeved on the spring sleeve shaft.

[0020] In the above-mentioned test tube flexible pressing device, a third bearing is installed on the pressure plate mounting seat, and the third bearing is sleeved on the guide shaft.

[0021] In the above-mentioned test tube flexible pressing device, the pressing plate is connected to the back side of the pressing plate mounting seat through a vertical connecting plate, and a sample rack is provided directly below the pressing plate.

[0022] Compared to existing technologies, the present invention offers the following advantages: It enables flexible compression of capped test tubes, ensuring that the compression process does not damage the test tubes. Once the pressure plate has completed compression of the test tubes, further downward displacement is cushioned by spring deformation. Similarly, due to the flexible compression, sufficient margin is provided in the downward displacement design, eliminating the need for precise control and accommodating minor dimensional differences between the sample rack and the test tubes. During use, flexible compression can be achieved for test tubes requiring puncture and aspiration, ensuring a single, stable position of the test tubes in the sample rack and preventing damage to the puncture needle during needle bending.

[0023] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 is a schematic cross-sectional view of the motion guide structure of the present invention;

[0026] Description of the accompanying drawings:

[0027] 1—motor; 2—support plate; 3—screw nut;

[0028] 4—Nut fixing seat; 5—Base; 6—Press down to detect the optical coupler;

[0029] 7—Press down the optical coupler baffle; 8—Press plate mounting seat; 9—Guide shaft;

[0030] 10—Flexible buffer pressure block; 11—Pressure plate; 12—Guide rod connecting block;

[0031] 13—Guide rod limit stopper; 14—Compression spring; 15—Spring sleeve shaft;

[0032] 16—first bearing; 17—second bearing; 18—third bearing. DETAILED DESCRIPTION

[0033] like Figure 1 and Figure 2 As shown, a test tube flexible pressing device includes a driving unit, a guiding unit and a pressing unit;

[0034] The driving unit includes a pressure plate mounting seat 8 and a support plate 2 for supporting the interior of the pressure plate mounting seat 8, and the support plate 2 can move up and down;

[0035] The guide unit includes a base 5, a guide rod connecting block 12, a guide shaft 9, a compression spring 14 and a spring sleeve shaft 15; the guide shaft 9 is vertically mounted on the base 5, the guide rod connecting block 12 and the pressure plate mounting seat 8 are both sleeved on the guide shaft 9, and the guide rod connecting block 12 is above the pressure plate mounting seat 8;

[0036] The pressure plate mounting seat 8 is also sleeved on the spring sleeve shaft 15; the lower end of the spring sleeve shaft 15 is connected to the support plate 2, and the upper end of the spring sleeve shaft 15 is connected to the guide rod connecting block 12; the compression spring 14 is sleeved on the spring sleeve shaft 15, and the upper and lower ends of the compression spring 14 are respectively supported between the guide rod connecting block 12 and the pressure plate mounting seat 8;

[0037] The pressing unit includes a pressing plate 11 , which is connected to a pressing plate mounting seat 8 .

[0038] During use, the support plate 2 moves upward, lifting the pressure plate mounting seat 8, thereby moving the pressure plate 11 away from the test tube. When the support plate 2 moves downward, the pressure plate 11 encounters no obstruction in the early stages of movement, and the pressure plate mounting seat 8 remains in contact with the support plate 2 under the elastic force of the compression spring 14. As the support plate 2 continues to descend, the pressure plate 11 encounters a test tube in the sample rack and immediately presses down on the test tube. Once the test tube in the sample rack has bottomed out, if the support plate 2 continues to descend, the compression spring 14 will compress, separating the pressure plate mounting seat 8 from the support plate 2. The downward pressure distance of the support plate 2 is offset by the contraction distance of the compression spring 14, ensuring that the test tube will not be broken due to overpressure.

[0039] In this embodiment, the drive unit also includes a motor 1, a screw nut 3 and a nut fixing seat 4; the motor 1 is installed on the support plate 2, and the output shaft of the motor 1 has a screw structure; the nut fixing seat 4 is installed on the base 5, and the screw nut 3 is fixed on the nut fixing seat 4; the screw structure of the output shaft of the motor 1 and the screw nut 3 are installed in coordination.

[0040] When the motor 1 rotates, since the screw nut 3 is fixed, the screw structure of the motor 1 output shaft and the screw nut 3 are installed in conjunction with each other, the motor 1 will move up and down, further driving the support plate 2, and the support plate 2 further drives the guide rod connecting block 12 to move up and down.

[0041] In this embodiment, a flexible buffer block 10 is installed on the bottom surface of the pressing plate 11. The flexible buffer block 10 can be a rubber sheet or a sponge sheet. The setting of the flexible buffer block 10 can prevent the pressing plate 11 from directly contacting the test tube, thereby avoiding damage to the test tube caused by rigid impact.

[0042] In this embodiment, a downward pressing optical coupler baffle 7 is installed on the pressure plate mounting seat 8, and a downward pressing detection optical coupler 6 used in conjunction with the downward pressing optical coupler baffle 7 is installed on the base 5. The downward pressing optical coupler baffle 7 is above the downward pressing detection optical coupler 6.

[0043] It should be noted that the combined use of the pressure optocoupler baffle 7 and the downward pressure detection optocoupler 6 can provide a judgment signal to the control unit, thereby better judging the displacement of the pressure plate mounting seat 8 and facilitating the control of the position of the pressure plate mounting seat 8.

[0044] In this embodiment, the installation position of the downward-pressing optical coupling baffle 7 on the pressure plate mounting seat 8 can be adjusted up and down.

[0045] It should be noted that the downward-pressing optical coupler baffle 7 has a matching slide rail on the pressure plate mounting seat 8. The downward-pressing optical coupler baffle 7 moves up and down along the slide rail. After moving to the appropriate position, the position of the downward-pressing optical coupler baffle 7 is fixed by a top screw or other locking unit.

[0046] The position of the downward pressing optical coupler baffle 7 can be adjusted up and down, which can indirectly adjust the downward pressing displacement distance of the pressure plate mounting seat 8, thereby realizing the adjustment of the pressing needs of test tubes of different sizes, so that the present invention can use the pressing needs of test tubes of more sizes.

[0047] In this embodiment, a guide rod limit block 13 is installed at the upper end of the guide shaft 9 , and the guide rod limit block 13 is used to limit the guide rod connecting block 12 from separating from the guide shaft 9 .

[0048] In this embodiment, a first bearing 16 is installed on the guide rod connecting block 12 , and the first bearing 16 is sleeved on the guide shaft 9 .

[0049] In this embodiment, a second bearing 17 is installed on the pressure plate mounting seat 8 , and the second bearing 17 is sleeved on the spring sleeve shaft 15 .

[0050] In this embodiment, a third bearing 18 is installed on the pressure plate mounting seat 8 , and the third bearing 18 is sleeved on the guide shaft 9 .

[0051] It should be noted that, in this embodiment, the guide shaft 9 and the spring sleeve shaft 15 are arranged in pairs, and the first bearing 16, the second bearing 17 and the third bearing 18 are all guide bearings. The setting of the guide bearings can ensure the smoothness and stability of the up and down movement of the pressure plate mounting seat 8 and the guide rod connecting block 12.

[0052] In this embodiment, the pressing plate 11 is connected to the back side of the pressing plate mounting base 8 through a vertical connecting plate. A sample rack is provided directly below the pressing plate 11 . The pressing plate 11 has puncture holes for puncturing the test tubes below.

[0053] When the present invention is in use, when the motor 1 moves upward, it automatically lifts the pressure plate mounting seat 8, thereby driving the flexible buffer pressure block 10 away from the test tube. When the motor 1 moves downward, the flexible buffer pressure block 10 encounters no obstruction in the front part of the movement, and the pressure plate mounting seat 8 always maintains contact with the support plate 2. The drive motor 1 continues to move downward, and when the flexible buffer pressure block 10 encounters a test tube in the sample rack, it immediately presses the test tube downward. When the test tube in the sample rack is pressed to the bottom, if the motor 1 continues to move downward, the compression spring 14 will be compressed, and the pressure plate mounting seat 8 will separate from the support plate 2, which can ensure that the test tube will not be broken due to overpressure.

[0054] In summary, the present invention provides a flexible test tube pressing device that can achieve flexible pressing of test tubes that need to be punctured and sampled, ensuring the unique stability of the test tube in the sample rack and avoiding damage to the puncture needle during the puncture process.

[0055] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A test tube flexible pressing device, characterized in that: It includes a driving unit, a guiding unit and a pressing unit; The driving unit comprises a pressure plate mounting seat (8) and a support plate (2) for supporting the interior of the pressure plate mounting seat (8), wherein the support plate (2) is movable up and down; The guide unit comprises a base (5), a guide rod connecting block (12), a guide shaft (9), a compression spring (14) and a spring sleeve shaft (15); the guide shaft (9) is vertically mounted on the base (5), the guide rod connecting block (12) and the pressure plate mounting seat (8) are both sleeved on the guide shaft (9), and the guide rod connecting block (12) is above the pressure plate mounting seat (8); The pressure plate mounting seat (8) is also sleeved on the spring sleeve shaft (15); the lower end of the spring sleeve shaft (15) is connected to the support plate (2), and the upper end of the spring sleeve shaft (15) is connected to the guide rod connecting block (12); the compression spring (14) is sleeved on the spring sleeve shaft (15), and the upper and lower ends of the compression spring (14) are respectively supported between the guide rod connecting block (12) and the pressure plate mounting seat (8); The pressing unit comprises a pressing plate (11), and the pressing plate (11) is connected to a pressing plate mounting seat (8).

2. A test tube flexible pressing device according to claim 1, characterized in that: The drive unit further comprises a motor (1), a screw nut (3) and a screw nut fixing seat (4); the motor (1) is mounted on a support plate (2), and the output shaft of the motor (1) has a screw structure; The nut fixing seat (4) is mounted on the base (5), and the screw nut (3) is fixed on the nut fixing seat (4); The screw structure of the output shaft of the motor (1) and the screw nut (3) are mounted in coordination.

3. A test tube flexible pressing device according to claim 1, characterized in that: A flexible buffer pressing block (10) is installed on the bottom surface of the pressing plate (11).

4. A test tube flexible pressing device according to claim 1, characterized in that: A downward pressing optical coupling baffle (7) is installed on the pressure plate mounting seat (8), and a downward pressing detection optical coupler (6) used in conjunction with the downward pressing optical coupling baffle (7) is installed on the base (5), and the downward pressing optical coupling baffle (7) is above the downward pressing detection optical coupler (6).

5. A test tube flexible pressing device according to claim 4, characterized in that: The installation position of the downward-pressing optical coupling baffle (7) on the pressure plate mounting seat (8) can be adjusted up and down.

6. A test tube flexible pressing device according to claim 1, characterized in that: A guide rod limit baffle (13) is installed at the upper end of the guide shaft (9), and the guide rod limit baffle (13) is used to limit the guide rod connecting block (12) from separating from the guide shaft (9).

7. A test tube flexible pressing device according to claim 1, characterized in that: A first bearing (16) is mounted on the guide rod connecting block (12), and the first bearing (16) is sleeved on the guide shaft (9).

8. A test tube flexible pressing device according to claim 1, characterized in that: A second bearing (17) is mounted on the pressure plate mounting seat (8), and the second bearing (17) is sleeved on the spring sleeve shaft (15).

9. A test tube flexible pressing device according to claim 1, characterized in that: A third bearing (18) is mounted on the pressure plate mounting seat (8), and the third bearing (18) is sleeved on the guide shaft (9).

10. A test tube flexible pressing device according to claim 1, characterized in that: The pressing plate (11) is connected to the back side of the pressing plate mounting seat (8) through a vertical connecting plate, and a sample rack is arranged directly below the pressing plate (11).