Liquid treatment device and in-vitro diagnostic equipment

Abstract

The present application relates to a liquid treatment device and in vitro diagnostic equipment, the liquid treatment device comprising: a housing for placing a first kit and a second kit; the moving part is movably mounted on the shell and can be controlled to sequentially pass through a first position and a second position relative to the shell; the follow-up assembly is movably installed on the shell. The follow-up assembly abuts against the moving part when the moving part moves to the first position, and the follow-up assembly synchronously moves along with the moving part when the moving part moves to the second position from the first position. The first reagent needle is arranged on the moving part and can extend into the first reagent box in the moving process of the moving part; the second reagent needle is arranged on the follow-up assembly, and the second reagent needle can extend into the second kit in the process that the follow-up assembly moves along with the moving part. By controlling the movement of the moving part, the functions of waste liquid collection and reagent suction can be realized at the same time, the movement is reliable, the efficiency is high, the structure of the liquid treatment device is simplified, and the production and later maintenance cost of the liquid treatment device is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of in vitro diagnostic devices, and particularly to a liquid handling device and an in vitro diagnostic device. Background Art

[0002] In the application of in vitro diagnostic devices, such as in gene sequencers, it is necessary to complete the operations of aspirating reagents and recovering reagents through a needle assembly. Therefore, current in vitro diagnostic devices usually have two sets of needle assemblies, which are respectively used for aspirating reagents and recovering waste liquid, and also have two sets of power systems to respectively drive the two sets of needle assemblies to complete the corresponding aspirating or recovering operations. However, the two sets of power systems not only have high costs, but also make the structure of the in vitro diagnostic device complex, which is not conducive to the miniaturization of the in vitro diagnostic device. Summary of the Invention

[0003] Based on this, in view of the problem of the complex structure of in vitro diagnostic devices, it is necessary to provide a liquid handling device and an in vitro diagnostic device.

[0004] A liquid handling device includes:

[0005] A housing for placing a first reagent kit and a second reagent kit;

[0006] A moving member movably installed on the housing and controllably passing through a first position and a second position relative to the housing in sequence;

[0007] A follower assembly movably installed on the housing; when the moving member moves to the first position, the two are in contact with each other, and the follower assembly also moves synchronously with the moving member during the process of the moving member moving from the first position to the second position;

[0008] A first reagent needle provided on the moving member and capable of extending into the first reagent kit during the movement of the moving member; and

[0009] A second reagent needle provided on the follower assembly, and during the process of the follower assembly moving with the moving member, the second reagent needle can extend into the second reagent kit.

[0010] In one embodiment, the liquid handling device further includes an elastic member provided between the follower assembly and the housing;

[0011] During the process of the follower assembly moving with the moving member, the elastic member accumulates elastic force, and during the process of the moving member moving from the second position to the first position, the elastic force is used to push the follower assembly towards the first position.

[0012] In one embodiment, the follower assembly includes a follower seat, a guide rod, and a mounting base. The follower seat and the mounting base are respectively disposed at two ends of the guide rod in its longitudinal direction, and the second reagent needle is disposed on the mounting base.

[0013] The housing includes a support seat, and a movement hole extending longitudinally in a first direction is formed on the support seat. The guide rod passes through the movement hole, and the elastic member is disposed between the follower seat and the support seat. The first direction is the movement direction of the moving member. When the moving member moves to the first position, the follower seat abuts against the moving member, and during the process of the moving member moving from the first position to the second position, it moves synchronously with the moving member.

[0014] In one embodiment, during the process of the follower seat moving with the moving member, at least a part of the mounting base can extend into the second reagent kit.

[0015] In one embodiment, the liquid processing device further includes a liquid level sensor, and the liquid level sensor is disposed on the mounting base.

[0016] In one embodiment, the liquid processing device further includes a protection member, and the protection member is installed on the moving member. During the movement of the moving member, at least a part of the protection member can extend into the first reagent kit.

[0017] In one embodiment, the liquid processing device further includes a driving member, a lead screw, a slider, and a guide rail. The driving member and the guide rail are disposed on the housing. The lead screw extends longitudinally in the first direction and is connected to the driving member. The driving member is used to drive the lead screw to rotate around its own axis.

[0018] The slider is movably disposed on the guide rail in the first direction and is connected to the moving member. A threaded hole is formed on the slider, and the lead screw is engaged with the threaded hole. The first direction is the movement direction of the moving member.

[0019] In one embodiment, the liquid processing device further includes a position sensor, and the position sensor is disposed on the housing and is used to detect whether the first reagent kit is placed on the housing.

[0020] And / or, the position sensor is used to detect whether the first reagent kit is placed on the housing.

[0021] In one embodiment, a mating portion is further formed on the housing, and the mating portion is used to lock with the locking portion on the first reagent kit and / or the second reagent kit.

[0022] An in vitro diagnostic device, comprising a first reagent kit, a second reagent kit and the liquid handling device according to any one of the above.

[0023] In the above liquid handling device, the moving member drives the first reagent needle and the follower assembly to move together, and the follower assembly drives the second reagent needle to move together. In this way, by controlling the movement of only one component, the moving member, the first reagent needle can be inserted into the first reagent kit and the second reagent needle can be inserted into the second reagent kit simultaneously. Taking the example that the first reagent needle sucks the reagent in the first reagent kit and the second reagent needle discharges the waste liquid into the second reagent kit, by controlling the movement of this one component, the moving member, the functions of waste liquid collection and reagent suction can be achieved simultaneously, with reliable movement and high efficiency. The structure of the liquid handling device is streamlined, and the production and later maintenance costs of the liquid handling device are reduced. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the liquid handling device in some embodiments of the present application.

[0025] Figure 2 It is Figure 1 A schematic structural diagram of the liquid handling device when it is working in the embodiment.

[0026] Figure 3 It is Figure 1 A schematic structural diagram of the first reagent needle of the liquid handling device in the embodiment inserted into the first reagent kit.

[0027] Figure 4 It is Figure 1 A schematic structural diagram of the follower assembly of the liquid handling device in the embodiment.

[0028] Figure 5 It is Figure 1 A schematic structural diagram of the cooperation between the cooperation part and the locking part of the liquid handling device in the embodiment.

[0029] Description of the Reference Numerals:

[0030] Housing 10; First reagent kit 11; Second reagent kit 12; Support base 13; Guide hole 14; Cooperation part 15; Locking part 16;

[0031] Moving member 21; Elastic member 22;

[0032] Follower assembly 30; Follower seat 31; Guide rod 32; Mounting base 33;

[0033] First reagent needle 40; Second reagent needle 41; Liquid level sensor 42; Protective member 43; In-place sensor 44;

[0034] Drive member 51; Lead screw 52; Slide block 53; Guide rail 54; Detailed Embodiments

[0035] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. A lot of specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0036] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present application.

[0037] In addition, if terms such as "first" and "second" appear, these terms are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0038] In the present application, unless otherwise clearly specified and limited, if terms such as "install", "connect", "couple", "fix", etc. appear, these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0039] In this application, unless otherwise clearly specified and defined, when a first feature is described as being "on" or "under" a second feature or similar descriptions, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0041] Refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown in

[0042] A liquid processing device provided by an embodiment of the present application includes a housing 10, a moving member 21, a first reagent needle 40, a follower assembly 30, and a second reagent needle 41. The housing 10 is used to place a first reagent kit 11 and a second reagent kit 12, and different liquids are stored in the first reagent kit 11 and the second reagent kit 12. The moving member 21 is movably installed on the housing 10 and can be controlled to sequentially pass through a first position and a second position relative to the housing 10. The follower assembly 30 is movably installed on the housing 10. When the moving member 21 moves to the first position, the two are in contact with each other, and the follower assembly 30 also moves synchronously with the moving member 21 during the process of the moving member 21 moving from the first position to the second position.

[0043] The first reagent needle 40 is provided on the moving member 21. During the movement of the moving member 21, the first reagent needle 40 is driven to move together, and during the movement of the moving member 21, the first reagent needle 40 can extend into the first reagent kit 11 to suck the liquid in the first reagent kit 11 or add liquid to the first reagent kit 11.

[0044] The above-mentioned liquid handling device drives the first reagent needle 40 and the follower assembly 30 to move together through the moving member 21, and drives the second reagent needle 41 to move together through the follower assembly 30. In this way, by controlling the movement of only one component, the moving member 21, the first reagent needle 40 can be inserted into the first reagent kit 11, and the second reagent needle 41 can be inserted into the second reagent kit 12 at the same time. Taking the first reagent needle 40 sucking the reagent in the first reagent kit 11 and the second reagent needle 41 discharging the waste liquid to the second reagent kit 12 as an example, by controlling the movement of this one component, the moving member, the functions of waste liquid collection and reagent suction can be achieved simultaneously, with reliable movement and high efficiency, streamlining the structure of the liquid handling device and reducing the production and later maintenance costs of the liquid handling device.

[0045] In some embodiments of the present application, the liquid handling device further includes an elastic member 22, and the elastic member 22 is disposed between the follower assembly 30 and the housing 10. During the movement of the follower assembly 30 following the moving member 21, the elastic member 22 stores elastic force. During the process of the moving member 21 moving from the second position to the first position, the elastic force stored by the elastic member 22 is used to push the follower assembly 30 towards the first position.

[0046] During the process of the moving member 21 moving from the second position to the first position, the first reagent needle 40 moves together with the moving member 21, so that the first reagent needle 40 leaves the second reagent kit 12. At the same time, under the action of the elastic member 22, the follower assembly 30 will also move towards the first position, and the follower assembly 30 will drive the second reagent needle 41 towards the first position, so that the second reagent needle 41 leaves the second reagent kit 12.

[0047] That is to say, by controlling the moving member 21 to move from the second position to the first position, the first reagent needle 40 and the second reagent needle 41 will respectively leave the first reagent kit 11 and the second reagent kit 12. In this way, the operations of the first reagent needle 40 and the second reagent needle 41 entering and leaving the first reagent kit 11 and the second reagent kit 12 only need to control one moving member 21, with reliable movement and high efficiency, streamlining the structure of the liquid handling device.

[0048] In some embodiments, the follower assembly 30 includes a follower seat 31, a guide rod 32 and a mounting base 33. The follower seat 31 and the mounting base 33 are respectively disposed at two ends of the guide rod 32 in its longitudinal direction, and the second reagent needle 41 is disposed on the mounting base 33.

[0049] The housing 10 includes a support base 13. A movement hole extending longitudinally in a first direction is formed in the support base 13. The guide rod 32 is inserted through the movement hole, and the elastic member 22 is disposed between the follower seat 31 and the support base 13. Herein, the first direction is the movement direction of the moving member 21. When the moving member 21 moves to the first position, the follower seat 31 abuts against the moving member 21 and moves synchronously with the moving member 21 during the process of the moving member 21 moving from the first position to the second position. During the process of the follower seat 31 moving with the moving member 21, the follower seat 31 compresses the elastic member 22, and the follower also drives the guide rod 32 to move. Under the action of the movement hole, the guide rod 32 drives the mounting base 33 to move along the first direction together, and finally the second reagent needle 41 on the mounting base 33 extends into the second reagent kit 12.

[0050] During the process of the moving member 21 moving from the second position to the first position, the elastic member 22 resumes deformation, thereby pushing the follower seat 31 to move towards the first position. The follower seat 31 then drives the mounting base 33 to move, and finally the second reagent needle 41 on the mounting base 33 moves away from the second reagent kit 12.

[0051] Furthermore, in order to improve the movement stability of the mounting base 33, there are two guide rods 32. The two guide rods 32 are arranged at intervals. One end of each guide rod 32 is connected to the follower seat 31, and the other end is connected to the mounting base 33. At the same time, two guide holes 14 are also formed in the support base 13. The two guide rods 32 are respectively inserted through the two guide holes 14. There are also two elastic members 22. The two elastic members 22 are respectively sleeved on the two guide rods 32. In this way, the two guide rods 32 jointly drive the mounting base 33 to rise or fall, improving the movement stability of the mounting base 33.

[0052] Specifically, in some embodiments, during the process of the follower seat 31 moving with the moving member 21, at least part of the mounting base 33 can extend into the second reagent kit 12. In this way, it can be avoided that the second reagent needle 41 is damaged due to forcibly dragging the second reagent kit 12 by humans when the second reagent needle 41 has not yet moved away from the second reagent kit 12. Specifically, when the mounting base 33 extends into the second reagent kit 12, the mounting base 33 limits the second reagent kit 12. Even if the second reagent kit 12 is dragged by humans, the second reagent kit 12 will not move significantly under the action of the mounting base 33, avoiding collision between the second reagent kit 12 and the second reagent needle 41 and causing damage to the second reagent needle 41.

[0053] To avoid damage to the first reagent needle 40, in some embodiments of the present application, the liquid handling device further includes a protection member 43. The protection member 43 is installed on the moving member 21. During the movement of the moving member 21, at least a part of the protection member 43 can extend into the first reagent kit 11, so as to limit the first reagent kit 11 through the protection member 43, and avoid damage to the first reagent needle 40 caused by forcibly dragging the first reagent kit 11 manually when the first reagent needle 40 has not left the first reagent kit 11.

[0054] In some embodiments, the protection member 43 is sleeved outside the first reagent needle 40 to enter the liquid extraction port on the first reagent kit 11 together with the first reagent needle 40. When the first reagent kit 11 is moved by an external force, the first reagent kit 11 will first come into contact with the protection member 43, avoiding damage to the first reagent needle 40 caused by contact between the first reagent kit 11 and the first reagent needle 40.

[0055] It should be noted that in some other embodiments, the protection member 43 can also be sleeved outside the first reagent needle 40 and directly inserted into the first reagent kit 11 together with the first reagent needle 40, which can also achieve the effect of avoiding damage to the first reagent needle 40 caused by forcibly dragging the first reagent kit 11 manually.

[0056] Specifically, in some embodiments, the liquid handling device further includes a liquid level sensor 42. The liquid level sensor 42 is arranged on the installation base 33, so that when the installation base 33 extends into the second reagent kit 12, the liquid level sensor 42 can monitor the height of the liquid level in the second reagent kit 12 in real time. When the second reagent needle 41 is used to output waste liquid into the second reagent kit 12, if the height of the waste liquid in the second reagent kit 12 reaches a certain threshold, the liquid level sensor 42 will issue an alarm and send a stop signal to stop the second reagent needle 41 from continuing to input waste liquid.

[0057] In some embodiments of the present application, the liquid handling device further includes a driving member 51, a lead screw 52, a slider 53, and a guide rail 54. The driving member 51 and the guide rail 54 are arranged on the housing 10. The lead screw 52 extends longitudinally along the first direction and is connected to the driving member 51. The driving member 51 is used to drive the lead screw 52 to rotate around its own axis. The slider 53 is movably arranged on the guide rail 54 along the first direction and is connected to the moving member 21. A threaded hole is provided on the slider 53, and the lead screw 52 is engaged with the threaded hole.

[0058] Thus, when the driving member 51 drives the lead screw 52 to rotate, under the action of the lead screw 52 and the guide rail 54, the slider 53 moves on the lead screw 52, and the moving direction of the slider 53 is different according to the different rotation directions of the lead screw 52. Specifically, when the driving member 51 drives the lead screw 52 to rotate forward, the slider 53 drives the moving member 21 to move under the action of the lead screw 52, so that the moving member 21 moves from the first position to the second position, and the first reagent needle 40 and the second reagent needle 41 are respectively inserted into the first reagent kit 11 and the second reagent kit 12. When the driving member 51 drives the lead screw 52 to rotate reversely, the slider 53 drives the moving member 21 to move in the opposite direction under the action of the lead screw 52, so that the moving member 21 moves from the second position to the first position, and the first reagent needle 40 and the second reagent needle 41 respectively leave the first reagent kit 11 and the second reagent kit 12.

[0059] Optionally, the driving member 51 is a motor. It should be noted that in some other embodiments, the movement of the moving member 21 can also be realized by means of a motor and a synchronous belt, etc., which is not limited herein.

[0060] In some embodiments of the present application, the liquid handling device further includes a position sensor 44. The position sensor 44 is arranged on the housing 10, and the position sensor 44 is used to detect whether the first reagent kit 11 is placed on the housing 10. When the first reagent kit 11 is not placed on the housing 10, the position sensor 44 is not triggered, and the user cannot start the driving member 51 to move the first reagent needle 40. Only when the first reagent kit 11 is placed on the housing 10 and the position sensor 44 is triggered, can the user start the driving member 51 to move the first reagent needle 40.

[0061] Further, the position sensor 44 can also be used to detect whether the second reagent kit 12 is placed on the housing 10, and only when both the first reagent kit 11 and the second reagent kit 12 are placed on the housing 10, can the position sensor 44 be triggered, and the user can start the driving member 51 to move the first reagent needle 40 and the second reagent needle 41. It can be understood that the position sensor 44 can not only be used to detect whether the first reagent kit 11 or the second reagent kit 12 is placed on the housing 10, but also be used to detect whether the first reagent kit 11 and the second reagent kit 12 are placed in place, that is, only when the first reagent kit 11 and the second reagent kit 12 are placed in place, can the first reagent kit 11 and the second reagent kit 12 be detected by the position sensor 44.

[0062] Optionally, the position sensor 44 is a reflective sensor, and in some other embodiments, the position sensor 44 can also be a pressure sensor, etc., which is not limited herein.

[0063] In some embodiments of the present application, refer to Figure 2 and Figure 5, a mating portion 15 is further provided on the housing 10. The mating portion 15 is used to lock with the locking portion 16 on the first reagent kit 11 and / or the second reagent kit 12. Through the mutual locking of the mating portion 15 and the locking portion 16, the user can determine that the first reagent kit 11 and / or the second reagent kit 12 have been installed in place, improving the human-machine interaction experience.

[0064] Optionally, the mating portion 15 is a plunger provided on the inner wall of the housing 10, and the locking portion 16 is a groove provided on the outer wall of the first reagent kit 11 and / or the second reagent kit 12. When the mating portion 15 locks with the locking portion 16, a part of the plunger extends into the groove. In some other embodiments, the locking portion 16 and the mating portion 15 can also be a male buckle and a female buckle, etc., which are not limited herein.

[0065] The present application also provides an in vitro diagnostic device, which includes a first reagent kit 11, a second reagent kit 12, and the liquid handling device in any of the above embodiments. By controlling the movement of only one component, i.e., the moving member 21, of the liquid handling device, the first reagent needle 40 can be inserted into the first reagent kit 11 and the second reagent needle 41 can be inserted into the second reagent kit 12 simultaneously, simplifying the structure of the in vitro diagnostic device and reducing the production and later maintenance costs of the in vitro diagnostic device. Optionally, the in vitro diagnostic device is a gene sequencer.

[0066] The above liquid handling device has at least the following advantages:

[0067] 1. A single driving member 51 can complete the functions of waste liquid collection and reagent aspiration.

[0068] 2. The structure is simple, the movement is reliable and efficient, the cost is low, and the later maintenance cost is low.

[0069] 3. The first reagent needle 40 and the second reagent needle 41 are protected by the protection member 43 and the mounting base 33, reducing the damage to the first reagent needle 40 and the second reagent needle 41 caused by illegal operations during use.

[0070] 4. The first reagent kit 11 and the second reagent kit 12 are provided with a locking portion 16 for mutual locking with the mating portion 15, improving the human-machine interaction experience.

[0071] 5. The liquid level sensor 42 monitors the liquid level height in the second reagent kit 12 in real time to realize the liquid full alarm function.

[0072] 6. The presence or absence of the first reagent kit 11 and the second reagent kit 12 can be detected by the in-place detection member, and whether the first reagent kit 11 and the second reagent kit 12 are placed in place can also be detected.

[0073] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0074] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be understood as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A liquid processing device, characterized in that, The liquid processing device includes: A housing (10) for placing a first reagent kit (11) and a second reagent kit (12); A moving member (21) movably mounted on the housing (10) and controllably passing through a first position and a second position relative to the housing (10) in sequence; A follower assembly (30) movably mounted on the housing (10); when the moving member (21) moves to the first position, the two are in contact with each other, and the follower assembly (30) also moves synchronously with the moving member (21) during the process of the moving member (21) moving from the first position to the second position; A first reagent needle (40) provided on the moving member (21) and capable of extending into the first reagent kit (11) during the movement of the moving member (21); and A second reagent needle (41) provided on the follower assembly (30), and during the process of the follower assembly (30) moving with the moving member (21), the second reagent needle (41) can extend into the second reagent kit (12).

2. The liquid processing apparatus according to claim 1, characterized in that, The liquid processing device further includes an elastic member (22), and the elastic member (22) is provided between the follower assembly (30) and the housing (10); During the process of the follower assembly (30) moving with the moving member (21), the elastic member (22) accumulates elastic force, and during the process of the moving member (21) moving from the second position to the first position, the elastic force is used to push the follower assembly (30) to move towards the first position.

3. The liquid processing apparatus according to claim 2, characterized in that, The follower assembly (30) includes a follower seat (31), a guide rod (32), and a mounting base (33). The follower seat (31) and the mounting base (33) are respectively provided at two ends of the guide rod (32) in its longitudinal direction, and the second reagent needle (41) is provided on the mounting base (33); The housing (10) includes a support seat (13), and a movement hole extending longitudinally in a first direction is formed on the support seat (13). The guide rod (32) passes through the movement hole, and the elastic member (22) is provided between the follower seat (31) and the support seat (13). The first direction is the movement direction of the moving member (21). When the moving member (21) moves to the first position, the follower seat (31) is in contact with the moving member (21), and the follower seat (31) moves synchronously with the moving member (21) during the process of the moving member (21) moving from the first position to the second position.

4. The liquid processing apparatus according to claim 3, wherein During the process of the follower seat (31) moving with the moving member (21), at least a part of the mounting base (33) can extend into the second reagent kit (12).

5. The liquid processing apparatus according to claim 3, wherein The liquid processing device further includes a liquid level sensor (42), and the liquid level sensor (42) is provided on the mounting base (33).

6. The liquid processing apparatus according to claim 1, wherein, The liquid processing device further includes a protection member (43), and the protection member (43) is mounted on the moving member (21). During the movement of the moving member (21), at least a part of the protection member (43) can extend into the first reagent kit (11).

7. The liquid processing apparatus according to claim 1, wherein The liquid processing device further includes a driving member (51), a lead screw (52), a slider (53), and a guide rail (54). The driving member (51) and the guide rail (54) are disposed on the housing (10). The lead screw (52) extends longitudinally in a first direction and is connected to the driving member (51). The driving member (51) is configured to drive the lead screw (52) to rotate about its own axis; The slider (53) is movably disposed on the guide rail (54) along the first direction and is connected to the moving member (21). A threaded hole is formed in the slider (53), and the lead screw (52) is engaged with the threaded hole. The first direction is the moving direction of the moving member (21).

8. The liquid processing apparatus according to claim 1, wherein The liquid processing device further includes a position sensor (44). The position sensor (44) is disposed on the housing (10) and is configured to detect whether the first reagent kit (11) is placed on the housing (10); and / or, the position sensor (44) is configured to detect whether the first reagent kit (11) is placed on the housing (10).

9. The liquid processing apparatus according to claim 1, wherein A mating portion (15) is further formed on the housing (10). The mating portion (15) is configured to be locked with a locking portion (16) on the first reagent kit (11) and / or the second reagent kit (12).

10. An in vitro diagnostic device, characterized in that, It includes a first reagent kit (11), a second reagent kit (12), and the liquid processing device according to any one of claims 1-9.

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