Liquid suction and discharge device and blood cell analysis apparatus

Abstract

The utility model discloses a kind of suction and drainage device and blood cell analysis equipment, it includes pedestal, is provided with first drive component and second drive component;Detection mechanism, is fixed on first drive component;Suction and drainage mechanism, including suction tube component, suction tube component is fixed on second drive component;Wherein, suction and drainage mechanism further includes suction and drainage component, suction and drainage component includes cylinder and plunger, cylinder is communicated with suction tube component by connecting pipe, plunger is slidably arranged in cylinder, one of plunger and cylinder is fixed to detection mechanism, another is fixed to pedestal.The utility model is divided into two by suction and drainage mechanism, namely suction tube component and suction and drainage component, then cooperate and divide into two, namely plunger and cylinder, cylinder and plunger are respectively fixed on pedestal and detection mechanism, plunger or cylinder is driven to move up and down using the movement of detection mechanism, so that the first end of plunger relatively reciprocates in cylinder, and then realize suction and drainage mechanism liquid suction or drainage operation.

Description

Technical Field

[0001] This utility model relates to the field of blood cell analysis technology, and in particular to a fluid aspiration and drainage device and a blood cell analysis equipment. Background Technology

[0002] Existing blood cell analysis equipment typically utilizes coordinated motion structures along the X, Y, and Z axes to perform a series of operations, including sample collection, addition, and detection. Specifically, the equipment uses X-axis and Y-axis motion structures to position the pipette or detection mechanism horizontally; simultaneously, it relies on the Z-axis motion structure to position the pipette and detection mechanism vertically. Then, the aspiration and dispensing components mounted on the pipette enable it to perform aspiration and dispensing functions.

[0003] like Figure 1 As shown, the blood cell analysis device includes a liquid aspiration device 100' and a detection mechanism 200'. The liquid aspiration device 100' and the detection mechanism 200' are respectively fixed on the motion structure along the Z-axis and move up and down along the Z-axis. In conjunction with the motion structures in the X-axis and Y-axis directions (not shown), the liquid aspiration device 100' and the detection mechanism 200' are sent to the preset position to perform liquid aspiration and detection operations.

[0004] To achieve the aspiration and dispensing functions of the aspiration and dispensing device 100', a pipette base 110' is provided, and an aspiration and dispensing assembly 120' is provided on one side or at one end of the pipette base 110'. To ensure that the aspiration and dispensing assembly 120' can automatically perform piston movement, a guide assembly needs to be added to it, so that the aspiration and dispensing assembly 120' can reciprocate along the direction set by the guide assembly, thereby achieving the aspiration and dispensing effects. However, adding a guide assembly to the aspiration and dispensing mechanism has certain drawbacks. From a spatial layout perspective, this will limit the horizontal and vertical spatial design of the blood cell analysis equipment. Sufficient space needs to be reserved inside the equipment for the guide assembly, making the already compact spatial layout even more cramped. In addition, the use of the guide assembly increases the complexity and size of the equipment, which is not conducive to the development of the equipment towards miniaturization.

[0005] Therefore, it is urgent to propose a liquid suction and discharge device to solve the problem. Utility Model Content

[0006] Based on this, the purpose of this utility model is to provide a liquid aspiration and dissipation device and a blood cell analysis equipment, which disassembles the aspiration and dissipation mechanism into a pipette assembly and a suction and dissipation assembly. The two ends of the suction and dissipation assembly are respectively set on the detection mechanism and the base. The aspiration or dissipation operation of the suction and dissipation assembly is realized in conjunction with the movement of the detection mechanism, which reduces the complexity of assembling the suction and dissipation mechanism and is conducive to the miniaturization of the product.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] In a first aspect, a blood cell analysis device includes:

[0009] The base is equipped with a first drive component and a second drive component;

[0010] The detection mechanism is fixed on the first drive component, and the first drive component is used to drive the detection mechanism to move up and down.

[0011] The suction and discharge mechanism includes a straw assembly, which is fixed on a second drive assembly. The second drive assembly is used to drive the straw assembly to move up and down.

[0012] The suction and discharge mechanism further includes a suction and discharge assembly, which includes a cylinder and a plunger. The cylinder is connected to the suction assembly via a connecting pipe. The plunger is slidably inserted into the cylinder. One of the plunger and the cylinder is fixed to the detection mechanism, and the other is fixed to the base.

[0013] When the first driving component drives the detection mechanism to move up and down, the plunger or the cylinder fixed on the detection mechanism moves synchronously and slides relative to the corresponding cylinder or plunger fixed on the base, so that the plunger reciprocates in the cylinder to realize the liquid suction or liquid discharge operation of the device.

[0014] Furthermore, the first driving component includes a first slide rail, a first slide block, and a first driving member. The first slide rail is placed on the base, the first slide block is slidably locked on the first slide rail, the detection mechanism is fixed on the first slide block, and the first driving member is used to drive the first slide block and the detection mechanism to slide up and down along the first slide rail.

[0015] Furthermore, the first driving component includes a first driving motor and a first driving rod. The first driving motor is fixed on the first slide and / or the detection mechanism. The first driving rod is connected to the output end of the first driving motor. The first driving rod is a lead screw structure. When the first driving motor drives the first driving rod to rotate, the first driving rod moves back and forth in the up and down direction.

[0016] Furthermore, the straw assembly includes a straw base and a docking nozzle. A through hole is formed on one side of the straw base in a vertical direction. The upper end of the through hole is fitted with the connecting tube to connect the straw assembly to the cylinder. The lower end of the through hole is connected to the upper end of the docking nozzle. A detachable tip is fitted at the lower end of the docking nozzle.

[0017] Furthermore, the second driving assembly includes a fixed base, a second slide rail, a second slide block, and a second driving member. The fixed base is fixed on the base, the second slide rail is fixed on the fixed base, the second slide block is slidably engaged on the second slide rail, the other side of the straw holder is fixed on the second slide block, and the second driving member is used to drive the second slide block to slide back and forth along the direction of the second slide rail, thereby driving the docking gun head connected to the straw holder and to slide up and down.

[0018] Furthermore, the straw assembly also includes a sliding sleeve, which is movably fitted over the straw seat and the docking nozzle. A limiting protrusion is provided on one side of the straw seat to drive the sliding sleeve to move upward with the straw seat. A limiting mechanism is provided on the base. When the second driving member drives the straw seat to move upward, the limiting mechanism prevents the sliding sleeve from moving upward by popping out a limiting block, so as to separate the tip from the docking nozzle.

[0019] Furthermore, a limiting groove is formed on one side of the sliding sleeve, and a limiting mechanism is provided on one side of the sliding sleeve. The limiting mechanism also includes a limiting seat, and a guide groove is formed on the limiting seat facing the sliding sleeve. A limiting block is provided in the guide groove, and the limiting block pops out from the guide groove or retracts into the guide groove under the action of the driving component.

[0020] The drive assembly includes a limiting post disposed in the guide groove, a second elastic member connected to the limiting post, a pushing block protruding from one side of the limiting block, and a pushing member disposed on one side of the pushing block. The limiting block has a receiving groove, the limiting post is placed in the receiving groove, and the second elastic member is placed between the limiting post and the groove wall of the receiving groove to provide the power required for the limiting block to reset.

[0021] The pusher is mounted on the first drive assembly or the detection mechanism. The first drive assembly drives the pusher to move up and down along the Z-axis. One side of the pusher has a beveled surface. Under the drive of the first drive assembly, the pusher fits against the beveled surface and applies force to it, causing the limiting block to move out of the guide groove along the guide groove direction.

[0022] Furthermore, the cylinder is fixed to one side of the base, the first end of the plunger is slidably inserted into the cylinder, the second end of the plunger is fixed to one side of the first drive assembly and / or the detection mechanism and disposed above the cylinder, the connecting pipe is connected to the lower end of the cylinder, and the first end of the plunger is disposed in the middle of the cylinder.

[0023] Furthermore, the cylinder is fixed to one side of the first drive assembly and / or the detection mechanism, the first end of the plunger is slidably inserted into the cylinder, the second end of the plunger is fixed to one side of the base and disposed below the cylinder, the connecting pipe is connected to the upper end of the cylinder, and the first end of the plunger is disposed in the middle of the cylinder.

[0024] Secondly, a blood cell analysis device includes the aforementioned aspiration and dissipation device, and also includes a driving device, which is connected to the aspiration and dissipation device in a transmission manner, and is used to drive the aspiration and dissipation device to move between different positions.

[0025] In summary, this utility model provides a liquid aspiration and dissipation device and a blood cell analysis equipment by dividing the aspiration and dissipation mechanism into two parts: a pipette assembly and a aspiration and dissipation assembly. The aspiration and dissipation assembly is further divided into two parts: a plunger and a cylinder. The cylinder and plunger are respectively fixed to the base and the detection mechanism. The movement of the detection mechanism drives the plunger or cylinder to move up and down, and then slides against the corresponding cylinder or plunger on the base. This causes the first end of the plunger to reciprocate within the cylinder, thereby achieving the liquid aspiration or dissipation operation of the device. Furthermore, this utility model utilizes the power of the first driving assembly to achieve the piston movement of the aspiration and dissipation assembly, eliminating the need to design a separate driving module for the aspiration and dissipation assembly. This effectively reduces the complexity of the device and its overall space occupation, and is more conducive to the miniaturization of the device. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of an existing liquid suction and discharge device;

[0027] Figure 2 This is a schematic diagram of the structure of a liquid suction and discharge device according to the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of a liquid suction and discharge device according to this utility model from another perspective;

[0029] Figure 4 This is an exploded view of the structure of a liquid suction and discharge device according to the present invention;

[0030] Figure 5 This is a schematic diagram of the combination of the suction and discharge assembly, the detection mechanism, and the first drive assembly of this utility model;

[0031] Figure 6 This is a schematic diagram of the combination of the detection mechanism and the first drive component of this utility model;

[0032] Figure 7 This is a schematic diagram of the combination of the suction and discharge mechanism and the second drive component measuring device of this utility model;

[0033] Figure 8This is a schematic diagram of the combination of the second slide and the straw seat of this utility model;

[0034] Figure 9 This is a structural reference diagram of the base and the first driving member in other embodiments of the present invention;

[0035] Figure 10 This is a structural reference diagram of the plunger, cylinder and connecting pipe of this utility model after assembly;

[0036] Figure 11 This is a reference diagram showing another structural arrangement of the plunger, cylinder and connecting pipe of this utility model;

[0037] Figure 12 This is a schematic diagram of the structure of the sliding sleeve of this utility model;

[0038] Figure 13 This is an exploded view of the limiting mechanism of this utility model.

[0039] Explanation of key component symbols:

[0040] 100', Liquid suction and discharge device; 110', Pipette holder; 120', Suction and discharge assembly; Detection mechanism 200';

[0041] 100. Base; 110. Threaded groove;

[0042] 200. Testing institution; 210. Lens assembly; 220. Housing;

[0043] 300. Suction and discharge mechanism; 310. Straw assembly; 311. Straw seat; 3111. Through hole; 3112. Limiting protrusion; 312. Docking nozzle; 313. Tip head; 314. Sliding sleeve; 3141. Limiting groove; 3142. Perforation; 3143. Positioning groove; 315. First elastic element; 320. Suction and discharge assembly; 321. Cylinder; 322. Plunger; 323. Connecting block; 330. Connecting pipe;

[0044] 400, First drive assembly; 410, First slide rail; 420, First slide block; 430, First drive component; 431, First drive motor; 432, First drive rod; 440, Support block;

[0045] 500, Second drive assembly; 510, Fixed base; 511, Fixed plate; 520, Second slide rail; 530, Second slide block; 540, Second drive component; 541, Second drive motor; 542, Second drive rod;

[0046] 600, Limiting mechanism; 610, Limiting block; 611, Pushing block; 6111, Inclined surface; 612, Receiving groove; 620, Limiting seat; 621, Guide groove; 630, Limiting post; 640, Second elastic element; 650, Pushing element. Detailed Implementation

[0047] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0048] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0050] Example 1

[0051] The liquid suction and discharge device provided by this utility model adopts the following structure.

[0052] like Figures 2 to 11As shown, this utility model provides a liquid suction and discharge device, including a base 100, a detection mechanism 200, and a suction and discharge mechanism 300. The base 100 is provided with a first driving component 400 and a second driving component 500. The detection mechanism 200 is used to perform detection operations on samples on a detection card. The detection mechanism 200 is fixed on the first driving component 400, which drives the detection mechanism 200 to move up and down. The suction and discharge mechanism 300 includes a pipette assembly 310. 10 is fixed on the second drive assembly 500, which is used to drive the straw assembly 310 to move up and down; wherein the suction and discharge mechanism 300 also includes a suction and discharge assembly 320, which includes a cylinder 321 and a plunger 322. The cylinder 321 is connected to the straw assembly 310 through a connecting pipe 330. The plunger 322 is slidably inserted into the cylinder 321. One of the plunger 322 and the cylinder 321 is fixed to the detection mechanism 200, and the other is fixed to the base 100.

[0053] When the first drive assembly 400 drives the detection mechanism 200 to move up and down, the plunger 322 or cylinder 321 fixed on the detection mechanism 200 moves up and down synchronously. At this time, the corresponding cylinder 321 or plunger 322 fixed on the base 100 remains stationary, so that the plunger 322 or cylinder 321 fixed on the detection mechanism 200 and the corresponding cylinder 321 or plunger 322 fixed on the base 100 slide relative to each other, thereby allowing the plunger 322 of the suction and discharge assembly 320 to reciprocate relative to each other within the cylinder 321, so as to realize the liquid suction or discharge operation of the device. This utility model disassembles the suction and discharge mechanism 300 into a suction tube assembly 310 and a suction and discharge assembly 320. Together with the first drive assembly 400, the first drive assembly 400 drives the detection mechanism 200 to move. After the detection mechanism 200 moves, the plunger 322 moves back and forth in the cylinder 321, thereby realizing the liquid suction or discharge operation of the device. This reduces the complexity of assembling the suction and discharge mechanism 300 and is conducive to the miniaturization of the product.

[0054] This invention divides the suction and discharge mechanism 300 into two parts: a suction tube assembly 310 and a suction and discharge assembly 320. Compared to the prior art where the suction and discharge mechanism 300 is installed as a single unit, this invention makes full use of the unused space inside the device, resulting in a more compact internal structure and facilitating miniaturization and portability. Furthermore, this invention divides the suction and discharge assembly 320 into two parts: a plunger 322 and a cylinder 321. The plunger 322 is fixed to one side of the detection mechanism 200, and the cylinder 321 is fixed to the base 100. Alternatively, as needed, the cylinder 321 can be fixed to one side of the detection mechanism 200, and the plunger 322 can be fixed to the base 100. The first drive assembly 400 then drives the detection machine. The movement of the mechanism 200 drives the plunger 322 to reciprocate within the cylinder 321, thereby enabling the device to perform liquid suction or discharge operations. Compared to existing technologies, this invention eliminates the need for a separate drive module to power the plunger 322's first end to slide within the cylinder 321. Instead, the plunger 322 or cylinder 321 is mounted on the detection mechanism 200, and the plunger 322 or cylinder 321 is moved by the first drive component driving the detection mechanism 200. This allows the plunger 322 or cylinder 321 to slide relative to the corresponding cylinder 321 or plunger 322 on the base 100, effectively reducing the complexity of the device and its overall space requirements, and facilitating the miniaturization of the device.

[0055] In one embodiment, the cylinder 321 is fixedly disposed on one side of the base 100, the first end of the plunger 322 is slidably inserted into the cylinder 321, the second end of the plunger 322 is fixedly disposed on one side of the detection mechanism 200, the up-and-down movement of the detection mechanism 200 drives the first end of the plunger 322 to move up and down synchronously within the cylinder 321, and the connecting pipe 330 is disposed at the upper end of the cylinder 321. In the initial state, the first end of the plunger 322 is located at the upper end of the cylinder 321. The first drive assembly 400 drives the detection mechanism 200 to move downward, and the first end of the plunger 322 moves downward synchronously within the cylinder 321, causing the first end of the plunger 322 to move away from the upper end of the cylinder 321, thereby enabling the suction and discharge assembly 320 to perform liquid suction operation through the connecting pipe 330 to the pipette assembly 310. Subsequently, the first drive assembly 400 drives the detection mechanism 200 to move upward, and the first end of the plunger 322 moves within the cylinder 321 towards the upper end of the cylinder 321, thereby enabling the suction and discharge assembly 320 to perform liquid discharge operation through the connecting pipe 330 to the pipette assembly 310. In addition, a connecting block 323 can be provided at the second end of the plunger 322. The connecting block 323 is fixedly connected to the detection mechanism 200. The connecting block 323 moves with the movement of the detection mechanism 200, thereby driving the first end of the plunger 322 to reciprocate synchronously in the cylinder 321. This utility model uses the up and down movement of the detection mechanism 200 to realize the reciprocating movement of the first end of the plunger 322 in the cylinder 321, reducing the cumbersomeness of adding additional guide components for the up and down movement of the plunger 322, effectively reducing the space occupied by the liquid suction and discharge device, and facilitating the miniaturization of the device.

[0056] Alternatively, the cylinder 321 is fixedly mounted on one side of the base 100, the first end of the plunger 322 is slidably inserted into the cylinder 321, the second end of the plunger 322 is fixedly mounted on one side of the detection mechanism 200, the up-and-down movement of the detection mechanism 200 drives the first end of the plunger 322 to move up and down synchronously within the cylinder 321, and the connecting pipe 330 is located at the lower end of the cylinder 321. In the initial state, the first end of the plunger 322 is positioned at the lower end of the cylinder 321. The first drive assembly 400 drives the detection mechanism 200 to move upward, and the first end of the plunger 322 moves upward synchronously within the cylinder 321, causing the first end of the plunger 322 to move away from the lower end of the cylinder 321. This allows the suction assembly 320 to perform liquid suction through the connecting pipe 330 to the suction tube assembly 310. Subsequently, the first drive assembly 400 drives the detection mechanism 200 to move downward, and the first end of the plunger 322 moves within the cylinder 321 towards the lower end of the cylinder 321. This allows the suction assembly 320 to perform liquid suction through the connecting pipe 330 to the suction tube assembly 310. The pipette assembly 310 is connected to the pipette assembly 330 to perform the liquid discharge operation. In addition, a connecting block 323 can be set at the second end of the plunger 322. The connecting block 323 is fixedly connected to the detection mechanism 200. The connecting block 323 moves with the movement of the detection mechanism 200, thereby driving the first end of the plunger 322 to reciprocate synchronously in the cylinder 321. This utility model uses the up and down movement of the detection mechanism 200 to realize the reciprocating movement of the first end of the plunger 322 in the cylinder 321, reducing the cumbersomeness of adding an additional guide assembly for the up and down movement of the plunger 322, effectively reducing the space occupied by the liquid suction and discharge device, and facilitating the miniaturization of the device.

[0057] Alternatively, the cylinder 321 is fixedly installed on one side of the detection mechanism 200, the first end of the plunger 322 is slidably inserted inside the cylinder 321, the second end of the plunger 322 is fixedly installed on one side of the base 100, the up and down movement of the detection mechanism 200 drives the cylinder 321 to move up and down synchronously outside the plunger 322, and the connecting pipe 330 is installed at the upper end of the cylinder 321. In the initial state, the first end of the plunger 322 is located at the upper end of the cylinder 321. The first drive assembly 400 drives the detection mechanism 200 to move upward. The cylinder 321 is sleeved on the outside of the plunger 322 and moves upward synchronously, so that the upper end of the cylinder 321 moves away from the first end of the plunger 322, thereby enabling the suction and discharge assembly 320 to perform liquid suction operation through the connecting pipe 330 to the suction tube assembly 310. Subsequently, the first drive assembly 400 drives the detection mechanism 200 to move downward. The cylinder 321 is sleeved on the outside of the plunger 322 and moves downward synchronously, so that the upper end of the cylinder 321 moves towards the first end of the plunger 322, thereby enabling the suction and discharge assembly 320 to perform liquid discharge operation through the connecting pipe 330 to the suction tube assembly 310.

[0058] Alternatively, the cylinder 321 is fixedly mounted on one side of the detection mechanism 200, the first end of the plunger 322 is slidably inserted inside the cylinder 321, the second end of the plunger 322 is fixedly mounted on one side of the base 100, the up and down movement of the detection mechanism 200 drives the cylinder 321 to move up and down synchronously outside the plunger 322, and the connecting pipe 330 is located at the lower end of the cylinder 321. In the initial state, the first end of the plunger 322 is located at the lower end of the cylinder 321. The first drive assembly 400 drives the detection mechanism 200 to move downward. The cylinder 321 is fitted outside the plunger 322 and moves downward synchronously, so that the lower end of the cylinder 321 moves away from the first end of the plunger 322, thereby enabling the suction and discharge assembly 320 to perform liquid suction operation through the connecting pipe 330 to the pipette assembly 310. Subsequently, the first drive assembly 400 drives the detection mechanism 200 to move upward. The cylinder 321 is fitted outside the plunger 322 and moves upward synchronously, so that the lower end of the cylinder 321 moves towards the first end of the plunger 322, thereby enabling the suction and discharge assembly 320 to perform liquid discharge operation through the connecting pipe 330 to the pipette assembly 310.

[0059] In one embodiment, the detection mechanism 200 is provided with a lens assembly 210. When the detection mechanism 200 is moved above the detection card, the first driving component 400 drives the detection mechanism 200 to move up and down, thereby adjusting the distance between the lens assembly 210 on the detection mechanism 200 and the detection card, realizing the zoom operation of the lens assembly 210, and facilitating the lens assembly 210 to observe the test sample on the detection card.

[0060] In one embodiment, the first driving assembly 400 includes a first slide rail 410, a first slide block 420, and a first driving member 430. The first slide rail 410 is placed on the base 100, the first slide block 420 is slidably disposed on the first slide rail 410, a plunger 322 is fixedly disposed on one side of the first slide block 420, and a detection mechanism 200 is fixedly disposed on the first slide block 420. The first driving member 430 is used to drive the first slide block 420 and the detection mechanism 200 to slide back and forth along the direction of the first slide rail 410, thereby realizing the movement effect of the detection mechanism 200 along the Z-axis direction. This facilitates the adjustment of the distance between the lens assembly 210 on the detection mechanism 200 and the detection card, realizes the zoom operation of the lens assembly 210, and facilitates the lens assembly 210 to observe the test sample on the detection card. Furthermore, a connecting block 323 can be provided at the second end of the plunger 322. The connecting block 323 is fixedly connected to the first slide 420 and / or the detection mechanism 200. The connecting block 323 moves with the movement of the first slide 420 and the detection mechanism 200, thereby driving the first end of the plunger 322 to move up and down reciprocally within the cylinder 321. This utility model achieves the up and down movement of the plunger 322 by driving the first slide 420 and the detection mechanism 200 to move up and down along the direction of the first slide rail 410 through the first driving component. The first slide rail 410 is used to guide the up and down movement of the plunger 322, reducing the cumbersomeness of adding additional guiding components for the up and down movement of the plunger 322, effectively reducing the space occupied by the liquid suction and discharge device, and facilitating the miniaturization of the device.

[0061] Specifically, the first driving component 430 includes a first driving motor 431 and a first driving rod 432. The first driving motor 431 is fixed on the first slide block 420 and / or the detection mechanism 200. The first driving rod 432 is connected to the output end of the first driving motor 431. The first driving rod 432 is a lead screw structure. A threaded groove 110 is provided on the base 100, and the first driving rod 432 is engaged in the threaded groove 110. The first driving rod 432 is connected to the base 100 by a thread. When the first driving motor 431 drives the first driving rod 432 to rotate, the first driving rod 432 moves back and forth in the up-down direction, thereby driving the first driving motor 431 to move back and forth in the Z-axis direction. Since the first driving motor 431 is fixedly connected to the first slide block 420 and / or the detection mechanism 200, the first driving motor 431 is realized. The seat 420 and / or the detection mechanism 200 move back and forth along the first slide rail 410. In addition, the connecting block 323 is fixedly connected to the first slide 420 and / or the detection mechanism 200. The connecting block 323 moves with the movement of the first slide 420 and the detection mechanism 200, thereby driving the first end of the plunger 322 to move up and down in the cylinder 321. This utility model uses the first drive motor to drive the first slide 420 and the detection mechanism 200 to move up and down along the first slide rail 410 to realize the up and down movement of the plunger 322. The first slide rail 410 is used to guide the up and down movement of the plunger 322, reducing the cumbersomeness of adding additional guide components for the up and down movement of the plunger 322, effectively reducing the space occupied by the liquid suction and discharge device, and facilitating the miniaturization of the device.

[0062] In this embodiment, the first drive rod 432 is vertically threaded onto the upper end of the base 100. The first slide 420 and / or the detection mechanism 200 extend to one side with a support block 440. A portion of the left side of the support block 440 is fixedly connected to the first slide 420 or the detection mechanism 200, while a portion of the right side of the support block 440 is fixedly connected to the first drive motor 431. The portion of the support block 440 connected to the first drive motor 431 is positioned directly above the base 100. The first drive rod 43... 2. The support block 440 is set through the base. By setting the first drive motor 431 directly above the base 100 and cooperating with the first drive rod 432 to be locked in the base 100 in the vertical direction, the area on the front of the base 100 is effectively utilized. This avoids the problem of the first drive motor 431 being set in the side space of the base 100, leaving the area directly above the base 100 empty. It also avoids the problem of the side space of the base 100 being occupied too much, resulting in the liquid suction and discharge device being too large after assembly.

[0063] Alternatively, such as Figure 9The diagram shows a structural combination of the base 100 and the first driving member 430 in another embodiment. This combination structure of the base 100 and the first driving member 430 addresses the problem of the first driving member 430 being placed on the side of the base 100, which results in the base 100 occupying too much side space. This combination structure can also drive the first slide block 420 and the detection mechanism 200 to slide back and forth along the direction of the first slide rail 410, which will not be elaborated here.

[0064] Furthermore, to improve the stability of the connection structure between the detection mechanism 200 and the first slide 420, the detection mechanism 200 also includes a housing 220, with the lens assembly 210 disposed at the lower end of the housing 220. The first slide 420 and the housing 220 of the detection mechanism 200 are integrally formed. Thus, there is no need to design an additional connection structure to improve the stability of the connection between the detection mechanism 200 and the first slide 420, effectively saving the assembly process of the liquid suction and discharge device. In this utility model, the first slide can be regarded as part of the housing of the detection mechanism 200, that is, the first slide can be regarded as part of the structure of the detection mechanism 200.

[0065] In one embodiment, the straw assembly 310 includes a straw seat 311 and a docking nozzle 312. The straw seat 311 is fixedly connected to the second drive assembly 500. A through hole 3111 is provided on one side of the straw seat 311 in the vertical direction. A connecting pipe 330 is inserted into the upper end of the through hole 3111 to connect the straw assembly 310 with the cylinder 321. The lower end of the through hole 3111 is connected to the upper end of the docking nozzle 312. A detachable tip 313 is inserted into the lower end of the docking nozzle 312. This utility model uses the through hole 3111 on the straw seat 311 to achieve the connection between the connecting pipe 330 and the docking nozzle 312, avoiding the need to add other connecting structures to achieve the connection between the connecting pipe 330 and the docking nozzle 312. This effectively saves the cumbersome assembly process of the suction and discharge mechanism 300 and also facilitates the miniaturization of the device.

[0066] In one embodiment, the second driving assembly 500 includes a fixed base 510, a second slide rail 520, a second slide block 530, and a second driving member 540. The fixed base 510 is fixed to the base 100, the second slide rail 520 is fixed to the fixed base 510, the second slide block 530 is slidably engaged on the second slide rail 520, the other side of the straw holder 311 is fixed to the second slide block 530, and the second driving member 540 is used to drive the second slide block 530 to slide back and forth along the direction of the second slide rail 520, thereby driving the straw holder 311 and the docking nozzle 312 connected to the straw holder 311 to slide up and down, thereby realizing the straw... The movement of component 310 along the Z-axis allows it to descend for liquid aspiration or dispensing, and to ascend to avoid obstacles such as the detection platform before being transferred to the detection card. The detection platform is located below the aspiration and dispensing device, and test tube holders and detection cards are placed at intervals on the platform. The pipette component 310 aspirates the reagent liquid from the test tube holder and then transfers it to the detection card for dispensing, thus obtaining the test sample on the detection card. Finally, the detection mechanism 200 is transferred to the detection card to perform the detection operation on the test sample.

[0067] Furthermore, the second slide and the straw seat 311 are integrally formed, and the combined structure of the second slide and the straw seat 311 has an L-shaped cross section, which makes it convenient for the slide 531 and the straw seat 311 to be set on different sides of the base 100, so as to maximize the use of the space around the base 100.

[0068] Specifically, the second driving component 540 includes a second driving motor 541 and a second driving rod 542. The second driving motor 541 is fixed on a fixed base 510, and a fixed plate 511 is provided at one end of the fixed base 510. The second driving rod 542 is a lead screw structure. One end of the second driving rod 542 is connected to the output end of the second driving motor 541, and the other end of the second driving rod is fixed on the fixed plate 511 by a bearing. The second driving rod 542 is connected to the second slide block 530 by a thread. When the second driving motor 541 drives the second driving rod 542 to rotate, the second slide block 530 slides back and forth along the direction of the second slide rail 520 under the action of the second driving rod 542. Since the straw assembly 310 is fixed on the second slide block 530, the straw assembly 310 can move along the Z-axis, thereby enabling the straw assembly 310 to descend for liquid suction or discharge, and to rise to avoid obstacles such as a detection platform.

[0069] This invention divides the suction and discharge mechanism 300 into two parts: a suction tube assembly 310 and a suction and discharge assembly 320. The suction tube assembly 310 is mounted on the second slide, and the suction and discharge assembly 320 is further divided into a cylinder 321 and a plunger 322, which are then mounted on the base 100 and the detection device, respectively. This results in a compact and rationally laid-out suction and discharge device. The various components are easier to access and disassemble. During maintenance and cleaning, the operator can more easily access the components that need to be processed without disassembling multiple other parts to reach the target component, greatly reducing the difficulty and time cost of maintenance and cleaning.

[0070] With the cylinder 321 fixed to one side of the base 100, the first end of the plunger 322 slidably inserted inside the cylinder 321, and the second end of the plunger 322 fixed to one side of the first slide 420 and / or the detection mechanism 200, and the first end of the plunger 322 located at the upper end of the cylinder 321, and the second end of the plunger 322 located at the lower end of the cylinder 321, and the connecting pipe 330 located at the upper end of the cylinder 321 as an example, in the specific operation of the liquid suction and discharge device of this utility model, the distance between the pipette assembly 310 and the lens assembly 210 and the detection platform should be adjusted first to facilitate the external drive device to move the liquid suction and discharge device to the test tube seat or to the detection card without obstruction. In this embodiment, the distance between the pipette assembly 310 and the lens assembly 210 and the detection platform is designed to be 2-4 cm. The external drive device can be a motion structure in the X-axis and Y-axis directions. The motion structure in the X-axis and Y-axis directions is known technology and will not be described in detail here. When the suction and discharge mechanism 300 needs to transfer the reagent liquid to the detection card, the external drive device needs to move the pipette assembly 310 to the test tube holder. At this time, the second drive motor 541 drives the second drive rod 542 to rotate, so that the second slide 530 moves downward, thereby driving the pipette assembly 310 downward until the pipette assembly 310 is placed in the reagent liquid in the test tube holder. This works in conjunction with the first drive motor 431 driving the first drive rod 542 to rotate. Rotating the lever 432 causes the first slide block 420 to move downwards, which in turn drives the first end of the plunger 322 to move downwards synchronously within the cylinder 321, creating a negative pressure within the cylinder 321. This completes the liquid suction operation of the suction and discharge mechanism 300. In this embodiment, to ensure that the lens assembly 210 avoids contacting the upper surface of the detection platform while the suction and discharge assembly 320 is performing the suction and discharge operation, the distance between the lens assembly 210 and the detection platform can be designed to be greater than the distance between the pipette assembly 310 and the detection platform. When the suction and discharge mechanism 300 needs to transfer the suctioned reagent liquid to the detection card, the second drive assembly 500 is used to drive the pipette assembly 310 to rise above the detection platform. The pipette assembly 310 is moved to the detection card using an external drive device. At this time, the second drive motor 541 drives the second drive rod 542 to rotate, causing the second slide 530 to move downward, which in turn drives the pipette assembly 310 to move downward until it is close to the detection card. Then, the first drive motor 431 drives the first drive rod 432 to rotate, causing the first slide 420 to move upward, which in turn drives the first end of the plunger 322 to move upward, thereby discharging the reagent liquid drawn in the pipette assembly 310 onto the detection card, completing the liquid discharge operation of the suction and discharge mechanism 300, thus obtaining the test sample on the detection card. Finally, the detection mechanism 200 is moved to the detection card to perform the detection operation on the test sample.Finally, when the suction and discharge mechanism 300 needs to move the detection mechanism 200 to the detection card, the second drive component 500 is used to drive the pipette assembly 310 to rise above the detection platform, and then the external drive device is used to move the detection mechanism 200 to the detection card. At this time, the first drive motor 431 drives the first drive rod 432 to rotate, causing the first slide 420 to move downward, adjusting the distance between the lens assembly 210 and the detection card to facilitate detection. In this embodiment, since the pipette assembly 310 is empty of reagent liquid and is in a suspended state when the device enters the detection process, the upward or downward movement of the plunger 322 driven by the detection mechanism 200 will keep the suction and discharge assembly 320 in a state of air intake or air discharge, which will not affect the subsequent operation of the pipette assembly 310 to draw or discharge reagent liquid.

[0071] Furthermore, to avoid a small amount of reagent residue remaining in the pipette assembly 310 after the suction and discharge mechanism 300 completes the suction and discharge operation of the reagent solution, the first driving assembly 400 can be used to first drive the detection mechanism 200 upward to discharge the residual reagent solution in the connecting tube 330, and then drive the detection mechanism 200 downward to perform the detection operation on the test sample. In this embodiment, the first end of the plunger 322 is located in the middle area of ​​the cylinder 321 to ensure that after the suction and discharge assembly 320 completes the discharge operation, the first end of the plunger 322 can still slide in the cylinder 321 to additionally achieve the air discharge operation.

[0072] Alternatively, to avoid the first drive assembly 400 driving the detection mechanism 200 to repeatedly move up and down due to the need to discharge residual reagent liquid from the pipette assembly 310, the following structure can also be adopted.

[0073] like Figure 10As shown, the cylinder 321 is fixed to one side of the base 100. The first end of the plunger 322 is slidably inserted into the cylinder 321, and the second end of the plunger 322 is fixed to one side of the first drive assembly 400 and / or the detection mechanism 200. Specifically, the second end of the plunger 322 is fixed to one side of the first slide block 420 and / or the detection mechanism 200 and is positioned above the cylinder 321. The connecting pipe 330 is connected to the lower end of the cylinder 321. The first end of the plunger 322 is positioned in the middle of the cylinder 321 to ensure that after the suction and discharge mechanism completes the liquid discharge operation, the first end of the plunger 322 can still slide inside the cylinder 321 to additionally achieve the air discharge operation. In this embodiment, after the detection mechanism 200 moves upward and downward under the drive of the first drive motor 431 to realize the liquid suction and discharge operation of the device, the detection mechanism... 200 returns to its initial height position, and then the detection mechanism 200 is moved to the detection card using an external drive device. At this time, the first drive motor 431 drives the first drive rod 432 to rotate, so that the first slide 420 and the detection mechanism 200 move downward synchronously to adjust the distance between the lens assembly 210 and the detection card for convenient detection. While the first slide 420 and the detection mechanism 200 move downward, they also drive the first end of the plunger 322 to slide downward in the cylinder 321, so that the suction and discharge assembly 320 can complete the venting operation to discharge the residual reagent liquid in the pipette assembly 310. That is, the venting operation of the suction and discharge assembly 320 and the adjustment of the distance between the lens assembly 210 and the detection card are carried out simultaneously, which effectively saves the detection process and avoids the problem of wasting the power of the first drive assembly 400.

[0074] Alternatively, such as Figure 11As shown, the cylinder 321 is fixed to one side of the first drive assembly 400 and / or the detection mechanism 200. Specifically, the cylinder 321 is fixed to one side of the first slide block 420 and / or the detection mechanism 200. The first end of the plunger 322 is slidably inserted into the cylinder 321, and the second end of the plunger 322 is fixed to one side of the base 100 and located below the cylinder 321. The connecting pipe 330 is connected to the upper end of the cylinder 321. The first end of the plunger 322 is located in the middle of the cylinder 321 to ensure that after the suction and discharge mechanism completes the liquid discharge operation, the first end of the plunger 322 can still slide inside the cylinder 321 to additionally achieve the air discharge operation. In this embodiment, after the detection mechanism 200 moves upward and downward under the drive of the first drive motor 431 to realize the liquid suction and discharge operation of the device, the detection mechanism 200 returns to its initial position. The detection mechanism 200 is then moved to the detection card using an external drive device. At this time, the first drive motor 431 drives the first drive rod 432 to rotate, causing the first slide block 420 and the detection mechanism 200 to move downwards synchronously to adjust the distance between the lens assembly 210 and the detection card for easier detection. Simultaneously, the downward movement of the first slide block 420 and the detection mechanism 200 will also drive the cylinder 321 to move downwards, causing the first end of the plunger 322 to slide upwards within the cylinder 321. This allows the suction and discharge assembly 320 to simultaneously complete the venting operation to discharge the residual reagent liquid in the pipette assembly 310. In other words, the venting operation of the suction and discharge assembly 320 and the adjustment of the distance between the lens assembly 210 and the detection card are carried out simultaneously, effectively saving detection steps and avoiding the problem of wasted power of the first drive assembly 400.

[0075] Example 2

[0076] As a disposable consumable, the tip needs to be detached from the suction / drainage device after testing to avoid cross-contamination during the testing process. One existing method involves sending the tip to a pre-set mounting structure for fixation. When the Z-axis drive mechanism raises the suction / drainage device to a preset height, the mounting structure prevents the tip from rising further, thus detaching it. This method requires an external mounting structure for fixation, which is cumbersome and unsuitable for miniaturized devices. To further adapt to device miniaturization, this invention employs the following structure.

[0077] like Figures 2 to 8 , Figure 12 , Figure 13As shown, based on Embodiment 1, the straw assembly 310 further includes a sliding sleeve 314, which is movably fitted over the straw seat 311 and the docking nozzle 312. The straw seat 311 is provided with a limiting protrusion 3112, which is used to drive the sliding sleeve 314 to move upward with the straw seat 311. The base 100 is provided with a limiting mechanism 600. When the second driving member 540 drives the straw seat 311 to move upward, the limiting mechanism 600 prevents the sliding sleeve 314 from moving upward by popping out the limiting block 610, so as to separate the tip head 313 from the docking nozzle 312.

[0078] Specifically, the process of detaching the tip 313 from the docking gun head 312 is as follows: First, driven by the second driving component, the straw seat 311, the docking gun head 312, and the tip 313 move upward synchronously with the upward movement of the second slide block, causing the sliding sleeve 314 to also move upward synchronously under the abutment of the limiting protrusion 3112; then, the limiting mechanism 600 prevents the sliding sleeve 314 from continuing to move upward by popping out the limiting block 610, until the upper end of the tip 313 contacts the lower end of the sliding sleeve 314; finally, blocked by the lower end of the sliding sleeve 314, the tip 313 no longer moves upward with the docking gun head 312, thereby realizing the separation operation of the tip 313 from the docking gun head 312 and completing the automatic detachment operation of the tip 313.

[0079] This utility model discloses a liquid suction and discharge device. By adding a sliding sleeve 314 structure to the suction tube assembly 310, and cooperating with a limiting mechanism 600 set on one side of the base 100, the tip 313 is prevented from moving upward with the docking nozzle 312, thereby achieving the separation operation of the tip 313 from the docking nozzle 312. Compared with the traditional tip removal method, it does not require adding a hanging structure in other positions of the liquid suction and discharge device to allow the tip 313 to detach. Instead, the sliding sleeve 314 and the limiting mechanism 600 are added to the existing structure of the liquid suction and discharge device to achieve the detachment effect of the tip 313. This provides greater flexibility and avoids the need for additional hanging structures, which would increase the assembly volume of the liquid suction and discharge device. This addresses the issue of miniaturization, thus facilitating product miniaturization. Furthermore, the use of a sliding sleeve 314 in conjunction with a limiting mechanism 600 prevents the sliding sleeve 314 from continuing upward movement along with the suction tube seat 311, the docking nozzle 312, and the tip head 313. When the upper end of the tip head 313 contacts the lower end of the sliding sleeve 314, precise braking is triggered, ensuring that the tip head 313 falls vertically directly below the docking nozzle 132 with minimal positional deviation. Additionally, the segmented motion control of the tip head 313's detachment process, driven by the second driving component 540, effectively reduces the impact on other components during device operation, significantly minimizing mechanical wear.

[0080] In one embodiment, the limiting mechanism 600 can be designed as a combination of an electromagnet or a drive cylinder with the limiting block 41. The electromagnet or the drive cylinder is used to control the pop-out or retraction of the limiting block 41. Taking the drive mechanism as an electromagnet as an example, when the electromagnet is energized in one direction, it generates magnetism, causing the limiting block 41 to be pushed out due to the repulsion of like poles. When the electromagnet is energized in the opposite direction, it generates opposite magnetism, causing the limiting block 41 to be retracted due to the attraction of opposite poles. Taking the drive mechanism as a drive cylinder as an example, the drive cylinder is connected to the limiting block 41 through a connecting rod. The drive cylinder drives the connecting rod to perform telescopic movement, thereby controlling the pop-out or retraction operation of the limiting block 41.

[0081] Alternatively, in other embodiments, the limiting mechanism of this utility model may also be implemented using the following specific structure.

[0082] like Figure 2 , Figure 4 , Figure 7 , Figure 12 and Figure 13 As shown, specifically, a limiting groove 3141 is provided on one side of the sliding sleeve 314, and a limiting mechanism 600 is provided on one side of the sliding sleeve 314. The limiting mechanism 600 also includes a limiting seat 620. A guide groove 621 is provided on the side of the limiting seat 620 facing the sliding sleeve 314. A limiting block 610 is provided in the guide groove 621. Under the action of the driving component, the limiting block 610 pops out from the guide groove 621 or retracts into the guide groove 621, thereby realizing the limiting operation of the sliding sleeve 314.

[0083] The drive assembly includes a limiting post 630 disposed in the guide groove 621, a second elastic member 640 connected to the limiting post 630, a pushing block 611 protruding from one side of the limiting block 610, and a pushing member 650 disposed on one side of the pushing block 611. The limiting block 610 has a receiving groove 612, the limiting post 630 is placed in the receiving groove 612, and the second elastic member 640 is placed between the limiting post 630 and the groove wall of the receiving groove 612 to provide the power required for the limiting block 610 to reset.

[0084] The pusher 650 is disposed on the first drive assembly 400 and / or the detection mechanism 200. Specifically, the pusher 650 is disposed on the first slide 420 and / or the detection mechanism 200. The first drive assembly 400 is used to drive the pusher 650 to move up and down along the Z-axis. The pusher block 611 has a beveled part 6111 on one side. Under the drive of the first drive assembly 400, the pusher 650 fits against the beveled part 6111 and applies force to the beveled part 6111, so that the limiting block 610 moves along the guide groove 621 to the outside of the guide groove 621, so as to achieve the limiting effect on the slide sleeve 314.

[0085] When the tip 313 is detached from the docking head 312, the pusher 650 moves away from the inclined surface 6111 under the action of the first drive assembly. Because the second elastic element 640 is in a compressed state, the limiting block 610 retracts into the guide groove 621 under the restoring force of the second elastic element 640. Taking the inclined surface 6111 of the pusher 611 facing downwards as an example, the first drive assembly 400 drives the pusher 650 to move upwards and fit against the inclined surface 6111. Under the pushing action of the pusher 650, the pusher 650 applies a force to the inclined surface 6111, causing the limiting block 610 to... The pusher 650 moves downward and away from the inclined surface 6111 under the drive of the first drive assembly 400, and moves along the direction of the guide groove 621 to protrude outside the guide groove 621. After the tip head 313 is detached from the docking gun head 312, the pusher 650 moves downward and away from the inclined surface 6111 under the drive of the first drive assembly 400. The limiting block 610 retracts into the guide groove 621 under the restoring force of the second elastic member 640. In this embodiment, the first drive assembly 400 provides the power for the pusher 650 to move up and down, without the need for additional drive structures. This effectively saves the device assembly cost and reduces the space occupied by the liquid suction and discharge device, and is also more conducive to the miniaturization of the device.

[0086] like Figure 4 , Figure 7 and Figure 13 As shown, the limiting seat 620 is fixedly mounted on the base 100 and is located on one side of the sliding sleeve 314. The limiting post 630 passes through the limiting seat 620 and extends into the receiving groove 612. The limiting post 630 is a bolt structure.

[0087] like Figure 4 and Figure 12 As shown, a through hole 3142 is provided at the bottom end of the sliding sleeve 314. The docking gun head 312 is set through the through hole 3142. In order to make the docking gun head 312 disengage from the tip head 313 when it moves upward, the diameter of the through hole 3142 must be smaller than the cross-sectional diameter of the upper end of the tip head 313, so that the tip head 313 is blocked outside the through hole 3142, and the automatic separation operation of the docking gun head 312 and the tip head 313 can be successfully realized.

[0088] The upper end of the sliding sleeve 314 has a U-shaped cross-section. A first elastic element 315 is provided between the lower end of the suction tube seat 311 and the sliding sleeve 314. The docking gun head 312 is disposed through the first elastic element 315. When the limiting block 610 over-limits the sliding sleeve 314, relative sliding occurs between the sliding sleeve 314 and the docking gun head 312, causing the first elastic element 315 to be in a compressed state. When the limiting block 610 does not limit the sliding sleeve 314, the sliding sleeve 314 returns to its initial position under the restoring force of the first elastic element 315, that is, the limiting protrusion 3112 is fitted with the upper groove wall of the positioning groove 3143. In addition, the docking gun head 312 is disposed through the first elastic element 315 so that the first elastic element 315 limits the periphery of the docking gun head 312, avoiding unnecessary friction between the docking gun head 312 and the inner wall of the sliding sleeve 314, which would affect the service life of the device.

[0089] When this utility model requires fitting a tip 313 to the docking nozzle 312, the external drive device moves the suction and discharge device above the tip supply device. The second drive unit moves the suction tube seat 311 and the docking nozzle 312 downwards together, and simultaneously moves the sliding sleeve 314 downwards until the bottom end hole 3142 of the sliding sleeve 314 is in contact with the upper end of the tip 313. At this point, the sliding sleeve 314 stops moving downwards due to the obstruction of the tip 313, and the docking nozzle 312 continues to move downwards under the drive of the second drive unit. The downward movement allows for a stable connection between the lower end of the docking gun head 312 and the upper end of the tip head 313. At this time, there is a certain distance between the limiting protrusion 3112 and the upper wall of the positioning groove 3143, providing a certain buffer space for the subsequent separation of the docking gun head 312 and the tip head 313. In addition, the connection between the lower end of the docking gun head 312 and the upper end of the tip head 313 forms a support effect on the sliding sleeve 314, which can prevent the sliding sleeve 314 from detaching from the straw seat 311 without the support of the limiting protrusion 3112.

[0090] When the tip 313 needs to be detached from the docking nozzle 312, the second driving member drives the straw seat 311, the docking nozzle 312, and the tip 313 to move upward together, and simultaneously drives the sliding sleeve 314 to move upward. At this time, the limiting mechanism 600 pops out the limiting block 610 and places the limiting block 610 in the limiting groove 3141. The sliding sleeve 314 continues to move upward along with the straw seat 311, the docking nozzle 312, and the tip 313 until the lower groove wall of the limiting groove 3141 contacts the limiting block 610, and the limiting block 610 stops the movement. Under the action, the sliding sleeve 314 stops moving upward, and the upper end of the tip head 313 also stops moving upward synchronously after being limited by the sliding sleeve 314. Since there is a certain distance between the limiting protrusion 3112 and the upper groove wall of the positioning groove 3143, the straw seat 311 is not limited by the upper groove wall of the positioning groove 3143, and under the drive of the second driving member, the straw seat 311 and the docking gun head 312 continue to move upward together, thereby separating the tip head 313 from the docking gun head 312 that continues to move upward, and successfully realizing the automatic separation operation of the docking gun head 312 and the tip head 313.

[0091] In summary, this utility model provides a liquid suction and discharge device that, by adding a sliding sleeve 314 structure to the suction tube assembly 310 and cooperating with a limiting mechanism 600 on one side of the base 100 to prevent the tip 313 from moving upwards along with the docking nozzle 312, achieves the separation of the tip 313 from the docking nozzle 312. Compared to traditional tip removal methods, it eliminates the need for additional mounting structures at other locations on the liquid suction and discharge device to detach the tip 313. Instead, it achieves the detachment of the tip 313 by adding a sliding sleeve 314 and a limiting mechanism 600 to the existing structure of the liquid suction and discharge device. This provides greater flexibility and avoids the need for additional mounting structures that would increase the assembly volume of the liquid suction and discharge device. The increased number of problems facilitates the miniaturization of the product. In addition, the use of the sliding sleeve 314 and the limiting mechanism 600 prevents the sliding sleeve 314 from continuing to move up and down with the straw seat 311, the docking gun head 312 and the tip head 313. When the upper end of the tip head 313 contacts the lower end of the sliding sleeve 314, precise braking is triggered, thereby ensuring that the tip head 313 falls vertically directly below the docking gun head 132 with minimal positional deviation. Furthermore, under the drive of the second driving member 540, the disengagement process of the tip head 313 adopts segmented motion control, which can effectively reduce the impact force on other components during the operation of the device, thereby significantly reducing the mechanical wear of the device.

[0092] Example 3

[0093] like Figures 2 to 13As shown, this utility model also discloses a blood cell analysis device, which includes the liquid aspiration and dissipation device in Embodiment 1, and also includes a driving device (not shown). The driving device is connected to the liquid aspiration and dissipation device in a transmission manner. The driving device can drive the liquid aspiration and dissipation device to move between different positions to realize the transfer of liquid and to realize the detection of the test sample on the test card.

[0094] In summary, this utility model provides a liquid aspiration and dissipation device and a blood cell analysis equipment by dividing the aspiration and dissipation mechanism 300 into two parts: a pipette assembly 310 and a aspiration and dissipation assembly 320. Furthermore, the aspiration and dissipation assembly 320 is further divided into two parts: a plunger 322 and a cylinder 321. The cylinder 321 and the plunger 322 are respectively fixed to the base 100 and the detection mechanism 200. The movement of the detection mechanism 200 drives the plunger 322 or the cylinder 321 to move up and down, and then slides against the corresponding cylinder 321 or plunger 322 on the base 100. This causes the first end of the plunger 322 to reciprocate within the cylinder 321, thereby achieving the liquid aspiration or dissipation operation of the device. Moreover, this utility model utilizes the power of the first drive assembly 400 to achieve the piston movement of the aspiration and dissipation assembly 320, eliminating the need to design an independent drive module for the aspiration and dissipation assembly 320. This effectively reduces the complexity of the device and its overall space occupation, and is more conducive to the miniaturization of the device.

[0095] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A liquid suction and discharge device, characterized in that, include: The base is equipped with a first drive component and a second drive component; The detection mechanism is fixed on the first drive component, and the first drive component is used to drive the detection mechanism to move up and down. The suction and discharge mechanism includes a straw assembly, which is fixed on a second drive assembly. The second drive assembly is used to drive the straw assembly to move up and down. The suction and discharge mechanism further includes a suction and discharge assembly, which includes a cylinder and a plunger. The cylinder is connected to the suction assembly via a connecting pipe. The plunger is slidably inserted into the cylinder. One of the plunger and the cylinder is fixed to the detection mechanism, and the other is fixed to the base. When the first driving component drives the detection mechanism to move up and down, the plunger or the cylinder fixed on the detection mechanism moves synchronously and slides relative to the corresponding cylinder or plunger fixed on the base, so that the plunger reciprocates in the cylinder to realize the liquid suction or liquid discharge operation of the device.

2. The liquid suction and discharge device according to claim 1, characterized in that, The first driving component includes a first slide rail, a first slide block, and a first driving member. The first slide rail is placed on the base, the first slide block is slidably locked on the first slide rail, the detection mechanism is fixed on the first slide block, and the first driving member is used to drive the first slide block and the detection mechanism to slide up and down along the first slide rail.

3. The liquid suction and discharge device according to claim 2, characterized in that, The first driving component includes a first driving motor and a first driving rod. The first driving motor is fixed on the first slide and / or the detection mechanism. The first driving rod is connected to the output end of the first driving motor. The first driving rod is a lead screw structure. When the first driving motor drives the first driving rod to rotate, the first driving rod moves back and forth in the up and down direction.

4. The liquid suction and discharge device according to claim 1, characterized in that, The straw assembly includes a straw base and a docking nozzle. A through hole is provided on one side of the straw base in a vertical direction. The upper end of the through hole is fitted with the connecting tube to connect the straw assembly to the cylinder. The lower end of the through hole is connected to the upper end of the docking nozzle. A detachable tip is fitted at the lower end of the docking nozzle.

5. The liquid suction and discharge device according to claim 4, characterized in that, The second drive assembly includes a fixed base, a second slide rail, a second slide block, and a second drive member. The fixed base is fixed on the base, the second slide rail is fixed on the fixed base, the second slide block is slidably engaged on the second slide rail, the other side of the straw holder is fixed on the second slide block, and the second drive member is used to drive the second slide block to slide back and forth along the direction of the second slide rail, thereby driving the docking gun head connected to the straw holder and to slide up and down.

6. The liquid suction and discharge device according to claim 5, characterized in that, The straw assembly also includes a sliding sleeve, which is movably fitted over the straw seat and the docking nozzle. A limiting protrusion is provided on one side of the straw seat to drive the sliding sleeve to move upward with the straw seat. A limiting mechanism is provided on the base. When the second driving member drives the straw seat to move upward, the limiting mechanism prevents the sliding sleeve from moving upward by popping out a limiting block, so as to separate the tip from the docking nozzle.

7. The liquid suction and discharge device according to claim 6, characterized in that, A limiting groove is provided on one side of the sliding sleeve, and a limiting mechanism is provided on one side of the sliding sleeve. The limiting mechanism also includes a limiting seat. A guide groove is provided on the limiting seat facing the sliding sleeve. A limiting block is provided in the guide groove. The limiting block pops out of the guide groove or retracts into the guide groove under the action of the driving component. The drive assembly includes a limiting post disposed in the guide groove, a second elastic member connected to the limiting post, a pushing block protruding from one side of the limiting block, and a pushing member disposed on one side of the pushing block. The limiting block has a receiving groove, the limiting post is placed in the receiving groove, and the second elastic member is placed between the limiting post and the groove wall of the receiving groove to provide the power required for the limiting block to reset. The pusher is mounted on the first drive assembly or the detection mechanism. The first drive assembly drives the pusher to move up and down along the Z-axis. One side of the pusher has a beveled surface. Under the drive of the first drive assembly, the pusher fits against the beveled surface and applies force to it, causing the limiting block to move out of the guide groove along the guide groove direction.

8. The liquid suction and discharge device according to claim 1, characterized in that, The cylinder is fixed to one side of the base, the first end of the plunger is slidably inserted into the cylinder, the second end of the plunger is fixed to one side of the first drive assembly and / or the detection mechanism and is disposed above the cylinder, the connecting pipe is connected to the lower end of the cylinder, and the first end of the plunger is disposed in the middle of the cylinder.

9. The liquid suction and discharge device according to claim 1, characterized in that, The cylinder is fixed to one side of the first drive assembly and / or the detection mechanism. The first end of the plunger is slidably inserted into the cylinder. The second end of the plunger is fixed to one side of the base and disposed below the cylinder. The connecting pipe is connected to the upper end of the cylinder. The first end of the plunger is disposed in the middle of the cylinder.

10. A blood cell analysis device, characterized in that, The device includes the liquid suction and discharge apparatus as described in any one of claims 1 to 9, and further includes a driving device, which is connected to the liquid suction and discharge apparatus in a transmission manner, and is used to drive the liquid suction and discharge apparatus to move between different positions.

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