Blood collection tube puncture and aspiration device

Abstract

The utility model discloses a blood collection tube puncture and liquid suction device, include: support frame, first lift module is set up on support frame, second lift module is set up in the output of first lift module, and is driven by first lift module and carries out lifting movement, puncture executive module is installed in the output of first lift module, and includes the puncture needle for puncture blood collection tube cover, sampling executive module is installed in the output of second lift module, and includes sampling fine needle, sampling fine needle passes through puncture needle inner hole and extends into the blood collection tube inner chamber that has been punctured under the drive of second lift module. The utility model drives puncture executive module and second lift module whole lifting movement through first lift module, and then independent drive sampling executive module makes lifting movement of puncture executive module, completes the liquid suction operation of sampling fine needle, and the structure is through lifting nest design, and the structure is compact, and the separation control of puncture and liquid suction process is realized simultaneously, and the motion precision is high.

Description

Technical Field

[0001] This utility model relates to the field of blood collection tube technology, and in particular to a blood collection tube puncture and aspiration device. Background Technology

[0002] In the field of automated medical testing, automated puncture and sample aspiration of blood collection tubes are crucial steps in sample pretreatment. Currently, most automated processing equipment on the market adopts an integrated design, relying on a single drive mechanism to simultaneously complete puncture and aspiration operations. This traditional approach has several limitations in practical applications: First, traditional puncture needles generally use a beveled tip design. When used directly for drainage after puncture, the beveled tip structure easily leads to liquid residue, especially when transferring small samples, significantly affecting the accuracy and integrity of pipetting and failing to meet the requirements of high-sensitivity tests. Second, most existing devices lack reliable adaptive buffering mechanisms. During puncture, inaccurate control of downward pressure can easily generate tube cap fragments, increasing the risk of sample contamination. Furthermore, they cannot effectively compensate for the height tolerance of the blood collection tubes, affecting operational stability and versatility. Therefore, there is an urgent need for a new type of blood collection tube processing device that can achieve independent control of puncture and aspiration, possesses buffering adaptability, and effectively avoids liquid residue. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a blood collection tube puncture and aspiration device.

[0004] The technical solution of this utility model includes:

[0005] Support frame;

[0006] The first lifting module is mounted on the support frame;

[0007] The second lifting module is located at the output end of the first lifting module and is driven by the first lifting module to perform lifting movements.

[0008] The puncture execution module is installed at the output end of the first lifting module and includes a puncture needle for puncturing the cap of the blood collection tube.

[0009] The sampling execution module is installed at the output end of the second lifting module and includes a sampling needle; the sampling needle passes through the inner hole of the puncture needle and extends into the lumen of the punctured blood collection tube under the drive of the second lifting module.

[0010] Preferably, the puncture execution module further includes:

[0011] A puncture mounting base is fixedly installed at the output end of the first lifting module, and the puncture needle is fixed to the puncture mounting base;

[0012] An adaptive buffer structure includes a limiting block located below the puncture mounting seat and a compression spring pre-compressed between the puncture mounting seat and the limiting block; the limiting block is movably sleeved around the circumference of the puncture needle.

[0013] Preferably, the adaptive buffer module further includes multiple guide connectors, the screw portion of the guide connector passes through the through hole on the puncture mounting seat and engages with the threaded hole on the limiting block, and the limiting block can move up and down relative to the puncture mounting seat along the axial direction of the guide connector.

[0014] Preferably, the first lifting module includes:

[0015] First drive motor;

[0016] The first linear guide rail is fixed on the support frame;

[0017] The first slider assembly is driven by the first drive motor and can slide along the first linear guide rail;

[0018] The puncture execution module is installed at the bottom of the first slider assembly, and the second lifting module is disposed on the first slider assembly.

[0019] Preferably, the second lifting module includes a second drive motor and a second linear guide rail fixed to the output end of the first lifting module, and also includes a second slider assembly driven by the second drive motor and sliding along the second linear guide rail, wherein the sampling execution module is mounted on the second slider assembly.

[0020] Preferably, it further includes an electrically connected control system and a first detection device; the first detection device includes a first photoelectric sensor mounted on the top of the support frame and a first trigger baffle mounted on the top of the first slider assembly; when the first slider assembly rises to a preset upper limit position, the first trigger baffle triggers the first photoelectric sensor.

[0021] Preferably, the first detection device further includes a second photoelectric sensor installed at the bottom of the first slider assembly, and the limiting block is provided with a second trigger baffle that cooperates with the second photoelectric sensor. When the limiting block contacts the blood collection tube cap and is pressed upward, the second trigger baffle triggers the second photoelectric sensor.

[0022] Preferably, the system further includes a second detection device electrically connected to the control system. The second detection device includes a third photoelectric sensor fixedly installed on the upper part of the first slider assembly and a third trigger baffle fixedly installed on the second slider assembly. When the second lifting module drives the second slider assembly to raise the sampling execution module to a preset limit position, the third trigger baffle triggers the third photoelectric sensor.

[0023] Preferably, the tip of the sampling needle has a flat tip.

[0024] Preferably, both the first drive motor and the second drive motor are lead screw motors;

[0025] The first drive motor is mounted on the support frame via a first motor mount, and its lead screw nut is connected to the first slider assembly.

[0026] The second drive motor is fixed to the first slider assembly via a second motor mount, and its lead screw nut is connected to the second slider assembly.

[0027] The beneficial technical effects of this utility model are as follows: First, the first lifting module drives the puncture execution module and the second lifting module to move up and down as a whole, completing the positioning and puncture of the blood collection tube; the second lifting module independently drives the sampling execution module to move up and down, completing the liquid aspiration operation of the sampling needle. This structure, through a two-stage lifting nested design, is compact and simultaneously achieves separate control of the puncture and liquid aspiration processes, resulting in high motion precision. Second, the adaptive buffer structure set in the puncture execution module ensures that it can effectively adapt to blood collection tubes of different heights during the puncture process, improving the versatility and stability of the device. Third, the sampling execution module uses a flat-tipped sampling needle, avoiding the liquid residue problem caused by using a beveled puncture needle for drainage, effectively improving the integrity and cleanliness of liquid transfer, and is particularly suitable for the precise transfer of trace amounts of liquid. In addition, by setting up a first detection device, a second detection device, and a control system, precise detection and control of the extreme positions of the lifting module are achieved, ensuring the safety and reliability of the device operation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 2 This is a side view of the overall structure of this utility model;

[0030] Figure 3 This is a schematic diagram of the specific structure of the puncture execution module of this utility model;

[0031] The components are as follows: 1. Support frame; 2. First lifting module; 21. First drive motor; 22. First linear guide rail; 23. First slider assembly; 3. Second lifting module; 31. Second drive motor; 32. Second linear guide rail; 33. Second slider assembly; 4. Blood collection tube holder; 5. Puncture execution module; 51. Puncture mounting seat; 52. Puncture needle; 53. Limiting block; 54. Compression spring; 6. Sampling execution module; 61. Sampling needle; 7. First detection device; 71. First photoelectric sensor; 72. First trigger baffle; 73. Second photoelectric sensor; 74. Second trigger baffle; 8. Second detection device; 81. Third photoelectric sensor; 82. Third trigger baffle. Detailed Implementation

[0032] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0033] like Figures 1 to 3 As shown, the present invention provides a blood collection tube puncture and aspiration device, which includes a support frame 1, a first lifting module 2 and a second lifting module 3 disposed on the support frame 1, and a blood collection tube frame 4 for placing blood collection tubes is provided below the first lifting module 2 and the second lifting module 3; it also includes a puncture execution module 5 for puncturing the cap of the blood collection tube and a sampling execution module 6 for aspirating and discharging liquid.

[0034] The puncture execution module 5 is installed at the output end of the first lifting module 2, and the sampling execution module 6 is installed at the output end of the second lifting module 3. The first lifting module 2 is used to drive the puncture execution module 5 and the second lifting module 3 to move up and down as a whole to complete the positioning and puncture of the blood collection tube. The second lifting module 3 is used to independently drive the sampling execution module 6 to move up and down, so that the sampling execution module 6 can pass through the internal channel of the puncture execution module 5 and enter the inner cavity of the blood collection tube to complete the liquid aspiration and drainage operation.

[0035] Specifically, the first lifting module 2 includes a first drive motor 21, a first linear guide rail 22 fixed on the support frame 1, and a first slider assembly 23 driven by the first drive motor 21 and capable of sliding along the first linear guide rail 22. The first linear guide rail 22 extends in a vertical direction, and the puncture execution module 5 is installed at the bottom of the first slider assembly 23.

[0036] The puncture execution module 5 includes a puncture mounting base 51, a puncture needle 52, and an adaptive buffer structure. The puncture mounting base 51 is fixedly mounted on the bottom of the first slider assembly 23. The puncture needle 52 is fastened to the threaded hole in the center of the puncture mounting base 51 through the external thread on its upper part.

[0037] The adaptive buffer structure includes a limiting block 53 and a compression spring 54. The limiting block 53 is movably sleeved on the outer periphery of the puncture needle 52 and located below the puncture mounting seat 51. The limiting block 53 and the puncture mounting seat 51 are connected and guided by multiple circumferentially evenly distributed guide connectors. The screw portion of the guide connector passes through the through hole on the puncture mounting seat 51 and engages with the threaded hole on the limiting block 53, allowing the limiting block 53 to move up and down relative to the puncture mounting seat 51 along the axial direction of the guide connector. In this embodiment, the guide connector is a plug screw. The compression spring 54 is sleeved on the outside of the puncture needle 52 and pre-compressed between the puncture mounting seat 51 and the limiting block 53, providing a continuous downward elastic pressure to the limiting block 53.

[0038] This adaptive buffer structure ensures that during the puncture process, after the limiting block 53 first contacts the blood collection tube cap, the puncture mounting seat 51 and the puncture needle 52 can overcome the spring force and continue to descend to complete the puncture action, while effectively adapting to blood collection tubes of different heights.

[0039] The second lifting module 3 includes a second drive motor 31, a second linear guide rail 32 fixed on the first slider assembly 23, and a second slider assembly 33 driven by the second drive motor 31 and capable of sliding along the second linear guide rail 32; the second linear guide rail 32 extends vertically, the second drive motor 31 is fixed on the first slider assembly 23 and rises and falls with the first slider assembly 23, and the sampling execution module 6 is mounted on the second slider assembly 33 and rises and falls independently relative to the puncture execution module 5 under the drive of the second drive motor 31.

[0040] The sampling execution module 6 includes a sampling needle 61 with a flat tip. Driven by the second lifting module 3, the sampling needle 61 passes through the inner hole of the puncture needle 52, extends into the lumen of the blood collection tube, and completes liquid aspiration and drainage through an external fluid pump. Since both liquid aspiration and drainage are completed through the flat-tipped sampling needle 61, the problem of liquid residue caused by using the oblique-tipped puncture needle 52 for drainage is avoided, which is especially beneficial for the precise transfer of trace amounts of liquid.

[0041] In this embodiment, both the first drive motor 21 and the second drive motor 31 are lead screw motors. Specifically, the first drive motor 21 is mounted on the support frame 1 via a first motor mount, and its lead screw nut is connected to the first slider assembly 23; the second drive motor 31 is fixed to the first slider assembly 23 via a second motor mount, and its lead screw nut is connected to the second slider assembly 33.

[0042] It also includes a first detection device 7, a second detection device 8, and a control system. The control system is electrically connected to the first detection device 7, the second detection device 8, the first drive motor 21, and the second drive motor 31, and is used to receive the detection signals from the first detection device 7 and the second detection device 8 and to precisely control the start-stop and running stroke of the first drive motor 21 and the second drive motor 31, respectively.

[0043] The first detection device 7 is used to detect the lifting limit position of the first lifting module 2. It includes a first photoelectric sensor 71 installed on the top of the support frame 1 and a first trigger baffle 72 installed on the top of the first slider assembly 23. The first trigger baffle 72 works in conjunction with the first photoelectric sensor 71. When the first lifting module 2 drives the first slider assembly 23 and the second lifting module 3 to rise to the preset limit position, the first trigger baffle 72 will enter the sensing area of ​​the first photoelectric sensor 71 and trigger a photoelectric signal. The control system controls the first drive motor 21 to stop driving, thereby achieving precise positioning of the upward movement.

[0044] The first detection device 7 further includes a second photoelectric sensor 73 installed at the bottom of the first slider assembly 23. The limiting block 53 is provided with a second trigger baffle 74 that cooperates with the second photoelectric sensor 73. In the initial stage of the puncture process, the limiting block 53 stops moving downwards after contacting the blood collection tube cap, while the first slider assembly 23 drives the puncture mounting seat 51, the puncture needle 52, and the second photoelectric sensor 73 to continue moving downwards, causing relative displacement between the second photoelectric sensor 73 and the second trigger baffle 74. When the puncture needle 52 completes the puncture, the second trigger baffle 74 enters the sensing area of ​​the second photoelectric sensor 73 and is triggered. This signal indicates that the puncture action has been completed, and the control system immediately stops the downward drive of the first drive motor 21.

[0045] The second detection device 8 is used to detect the upper limit position of the second lifting module 3, including a third photoelectric sensor 81 fixedly installed on the upper part of the first slider assembly 23 and a third trigger baffle 82 fixedly installed on the second slider assembly 33. When the second lifting module 3 drives the sampling execution module 6 to rise to the preset limit position, the third trigger baffle 82 triggers the third photoelectric sensor 81, and the control system stops the upward drive of the second drive motor 31 according to the signal of the third photoelectric sensor 81, ensuring that the sampling needle 61 can be accurately reset to the predetermined safe position of the inner hole of the puncture needle 52.

[0046] This device achieves separate control of the puncture and aspiration processes through the coordinated operation of the first lifting module 2 and the second lifting module 3. It has a compact structure, high motion precision, can be adapted to blood collection tubes of different sizes, and effectively improves the integrity and cleanliness of liquid transfer. It is particularly suitable for sample pretreatment processes in automated medical testing equipment.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A device for blood collection tube puncture and aspiration, characterized in that: include: Support frame (1); The first lifting module (2) is mounted on the support frame (1); The second lifting module (3) is located at the output end of the first lifting module (2) and is driven by the first lifting module (2) to perform lifting movements; The puncture execution module (5) is installed at the output end of the first lifting module (2) and includes a puncture needle (52) for puncturing the cap of the blood collection tube. The sampling execution module (6) is installed at the output end of the second lifting module (3) and includes a sampling needle (61); the sampling needle (61) passes through the inner hole of the puncture needle (52) and extends into the lumen of the punctured blood collection tube under the drive of the second lifting module (3).

2. The blood collection tube puncture and aspiration device according to claim 1, characterized in that: The puncture execution module (5) also includes: The puncture mounting base (51) is fixedly installed at the output end of the first lifting module (2), and the puncture needle (52) is fixed to the puncture mounting base (51). The adaptive buffer structure includes a limiting block (53) located below the puncture mounting seat (51) and a compression spring (54) pre-compressed between the puncture mounting seat (51) and the limiting block (53); the limiting block (53) is movably sleeved on the outer periphery of the puncture needle (52).

3. The blood collection tube puncture and aspiration device according to claim 2, characterized in that: The adaptive buffer module also includes multiple guide connectors. The screw portion of the guide connector passes through the through hole on the puncture mounting seat (51) and engages with the threaded hole on the limiting block (53). The limiting block (53) can move up and down relative to the puncture mounting seat (51) along the axial direction of the guide connector.

4. The blood collection tube puncture and aspiration device according to claim 2, characterized in that: The first lifting module (2) includes: First drive motor (21); The first linear guide rail (22) is fixed on the support frame (1); The first slider assembly (23) is driven by the first drive motor (21) and can slide along the first linear guide rail (22); The puncture execution module (5) is installed at the bottom of the first slider assembly (23), and the second lifting module (3) is disposed on the first slider assembly (23).

5. The blood collection tube puncture and aspiration device according to claim 4, characterized in that: The second lifting module (3) includes a second drive motor (31) and a second linear guide rail (32) fixed to the output end of the first lifting module (2), and also includes a second slider assembly (33) driven by the second drive motor (31) and sliding along the second linear guide rail (32). The sampling execution module (6) is mounted on the second slider assembly (33).

6. The blood collection tube puncture and aspiration device according to claim 5, characterized in that: It also includes an electrically connected control system and a first detection device (7); the first detection device (7) includes a first photoelectric sensor (71) mounted on the top of the support frame (1) and a first trigger baffle (72) mounted on the top of the first slider assembly (23); when the first slider assembly (23) rises to a preset upper limit position, the first trigger baffle (72) triggers the first photoelectric sensor (71).

7. The blood collection tube puncture and aspiration device according to claim 6, characterized in that: The first detection device (7) further includes a second photoelectric sensor (73) installed at the bottom of the first slider assembly (23). The limiting block (53) is provided with a second trigger baffle (74) that cooperates with the second photoelectric sensor (73). When the limiting block (53) contacts the blood collection tube cap and is pressed upward, the second trigger baffle (74) triggers the second photoelectric sensor (73).

8. The blood collection tube puncture and aspiration device according to claim 6, characterized in that: It also includes a second detection device (8) electrically connected to the control system. The second detection device (8) includes a third photoelectric sensor (81) fixedly installed on the upper part of the first slider assembly (23) and a third trigger baffle (82) fixedly installed on the second slider assembly (33). When the second lifting module (3) drives the second slider assembly (33) to drive the sampling execution module (6) to rise to the preset limit position, the third trigger baffle (82) triggers the third photoelectric sensor (81).

9. The blood collection tube puncture and aspiration device according to claim 1, characterized in that: The tip of the sampling needle (61) has a flat tip.

10. The blood collection tube puncture and aspiration device according to claim 5, characterized in that: Both the first drive motor (21) and the second drive motor (31) are lead screw motors; The first drive motor (21) is mounted on the support frame (1) via the first motor mount, and its lead screw nut is connected to the first slider assembly (23); The second drive motor (31) is fixed to the first slider assembly (23) via the second motor mount, and its lead screw nut is connected to the second slider assembly (33).

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