In-vitro diagnostic equipment, liquid injection and drainage assembly and cleaning swab

Abstract

The utility model relates to in-vitro diagnosis equipment, a liquid injection and drainage assembly and a cleaning swab. The cleaning swab includes a swab body. The swab main body is provided with a penetrating cavity penetrating through the two opposite ends of the swab main body, the swab main body is arranged outside the liquid injection and drainage needle in a vertically movable and sleeving mode through the penetrating cavity, the circumferential side wall of the swab main body is only provided with at least one liquid drainage part communicated with the penetrating cavity, and the liquid drainage part is used for being communicated with a liquid drainage device. Therefore, the structure of the cleaning swab can be simplified, the number of parts and pipelines can be reduced, and the equipment can be more compact. Besides, the peripheral side wall of the swab main body is not provided with a liquid inlet part, so that on one hand, the liquid injection and drainage needle is matched with the liquid path device connected with the liquid injection and drainage needle to complete the liquid injection and drainage functions, on the other hand, one set of liquid path device and the corresponding production and manufacturing cost can be saved, and meanwhile, the outer wall cleaning function of the liquid injection and drainage needle can be realized.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an in vitro diagnostic device, a liquid injection and discharge assembly, and a cleaning swab. Background Art

[0002] In vitro diagnostic equipment often uses injection and drainage to clean reaction vessels or reactants, such as the cleaning of colorimetric reaction cups in biochemical analyzers and the magnetic separation and cleaning of reactants in chemiluminescent immunoassay analyzers. In this process, injection and drainage needles are usually used for injection or drainage operations, and the injection and drainage needles will inevitably come into contact with the reaction liquid. Therefore, it is necessary to clean the outer wall of the injection and drainage needle, especially the outer wall part of the injection and drainage needle that comes into contact with the contaminated liquid, to avoid carryover contamination.

[0003] In the related art, a common cleaning method is to use a swab mounted on the injection and drainage needle to clean the outer wall of the injection and drainage needle. Specifically, the swab in the related art is not only provided with a through cavity, in which the injection and drainage needle can be movably mounted up and down, and a set of liquid path devices are configured to realize the injection and drainage actions, but also provided with a liquid inlet and a liquid discharge port connected to the through cavity, and another set of liquid path devices is configured to drive the cleaning liquid to pass through the liquid inlet, the through cavity, and the liquid discharge port in sequence to complete the cleaning of the outer wall of the injection and drainage needle. It can be seen that two sets of liquid path devices are required to complete the operations of injection, drainage and cleaning, which not only greatly increases the cost of the in vitro diagnostic equipment, but also makes the structure of the swab complicated, resulting in increased costs. Summary of the invention

[0004] Based on this, it is necessary to overcome the defects of the prior art and provide an in vitro diagnostic device, an injection and discharge assembly and a cleaning swab, which can simplify the structure and reduce costs while meeting the cleaning requirements.

[0005] A cleaning swab, comprising:

[0006] The swab body is provided with a through cavity penetrating through its two opposite ends, the swab body can be sleeved on the outside of the injection and drainage needle through the through cavity, and the swab body and the injection and drainage needle can move relative to each other up and down, and the circumferential side wall of the swab body is only provided with at least one drainage part which is in mutual passage with the through cavity, and the drainage part is used to communicate with the drainage device.

[0007] In one embodiment, the swab body is provided with an annular cavity circumferentially arranged around the through cavity, and the through cavity is connected with the drainage part through the annular cavity; and / or a plurality of drainage parts may be provided.

[0008] In one of the embodiments, the swab body further includes at least one through hole disposed between the annular cavity and the through cavity, and the through cavity is connected to the annular cavity through the through hole.

[0009] In one embodiment, the swab body includes a swab outer shell and a swab inner shell arranged inside the swab outer shell; one end of the swab outer shell is provided with an opening, and the other end is provided with an abutment portion that abuts and cooperates with the swab inner shell; the swab inner shell extends into the interior of the swab outer shell through the opening and abuts with the abutment portion; an annular groove is arranged around the outer wall of the swab inner shell, and the outer wall of the swab inner shell abuts against the inner wall of the swab outer shell, so that the annular groove cooperates with the inner wall of the swab outer shell to form the annular cavity; the drainage portion is installed on the swab outer shell; the through cavity respectively penetrates the abutment portion and the opposite ends of the swab inner shell.

[0010] In one embodiment, the swab body further includes a sealing ring disposed between the swab liner and the swab outer cover, and the sealing ring is located at one end of the swab liner away from the abutting portion.

[0011] In one embodiment, a first channel is provided on the abutting portion, and a second channel and a third channel are provided on the swab inner liner. The first channel, the second channel and the third channel are connected in sequence to form the through cavity; the inner diameter D2 of the second channel is larger than the inner diameter D1 of the first channel and the inner diameter D3 of the third channel.

[0012] A liquid injection and drainage component comprises the cleaning swab and a liquid injection and drainage needle. The liquid injection and drainage needle can be movably arranged in the through cavity up and down, and the liquid injection and drainage needle is provided with an injection channel and a drainage channel.

[0013] In one embodiment, the injection and drainage needle includes a first needle tube and a second needle tube, the first needle tube forms the injection channel, and the second needle tube forms the drainage channel; the second needle tube is inserted into the first needle tube, or the second needle tube is arranged in parallel with the first needle tube.

[0014] In one embodiment, the end of the first needle tube is formed with an injection port connected to the injection channel, and the end of the second needle tube is formed with a discharge port connected to the discharge channel, and the injection port and the discharge port are arranged sequentially along the injection direction.

[0015] An in vitro diagnostic device comprises the injection and drainage assembly.

[0016] Compared with the cleaning swab in the related art, the above-mentioned in vitro diagnostic equipment, injection and drainage assembly and cleaning swab are only provided with at least one drainage part that penetrates the cavity on the circumferential side wall of the swab body. In other words, it is not necessary to provide a liquid inlet part that penetrates the cavity on the circumferential side wall of the swab body. In this way, not only can the structure of the cleaning swab be simplified, but also the components and pipelines that cooperate with the liquid inlet part can be reduced, thereby making the device more compact. In addition, since the liquid inlet part is not provided on the circumferential side wall of the swab body, on the one hand, the injection and drainage needle and the liquid path device connected thereto cooperate to complete their own injection and drainage functions, and on the other hand, when the cleaning swab cleans the outer wall of the injection and drainage needle, the same set of liquid path device is reused to cooperate with the injection and drainage needle to complete the liquid inlet function, and then the outer wall of the injection and drainage needle can be cleaned by the cooperation of the injection and drainage needle, the drainage part and the drainage device, thereby saving a set of liquid path devices and corresponding production and manufacturing costs, and at the same time, the outer wall cleaning function of the injection and drainage needle can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG. 1 is a structural diagram of a working state of a liquid injection and discharge assembly according to an embodiment of the present application.

[0018] FIG. 2 is an enlarged structural diagram of FIG. 1 at point A. FIG.

[0019] FIG. 3 is a structural diagram of another working state of the injection and discharge assembly according to an embodiment of the present application.

[0020] FIG. 4 is an enlarged structural diagram of point B in FIG. 3 .

[0021] FIG. 5 is a structural diagram of a cleaning swab according to an embodiment of the present application.

[0022] FIG. 6 is a simplified schematic diagram of an in vitro diagnostic device according to an embodiment of the present application.

[0023] 10. Cleaning swab; 11. Swab body; 111. Through cavity; 112. Drainage portion; 113. Annular cavity; 114. Through hole; 115. Swab jacket; 1151. Abutment portion; 1152. First channel; 116. Swab liner; 1161. Annular groove; 1162. Second channel; 1163. Third channel; 117. Sealing ring; 20. Injection and drainage needle; 21. First needle tube; 211. Injection channel; 212. Injection port; 22. Second needle tube; 221. Drainage channel; 222. Drainage port. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth 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 violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0025] In order to make the instrument design simpler and reduce costs, it is desired to reduce the number of components as much as possible, especially the swab power source. In some embodiments, since the function is consistent with the power source of the injection and discharge needle itself, and the cleaning fluid used by both is also the same, it is more desired to be simplified.

[0026] Based on this, the embodiment of the present application provides an in vitro diagnostic device, an injection and drainage assembly, and a cleaning swab, which can simplify the structure and reduce costs while meeting the cleaning requirements. Specifically, the in vitro diagnostic device in the embodiment of the present application uses only one set of liquid path devices to complete the injection and drainage functions of the injection and drainage needle and the drainage function of the swab.

[0027] Referring to Figures 1 to 5, Figure 1 shows a structural diagram of a working state of an injection and discharge component of an embodiment of the present application. Figure 2 shows an enlarged structural diagram of Figure 1 at A. Figure 3 shows another structural diagram of the injection and discharge component of an embodiment of the present application. Figure 4 shows an enlarged structural diagram of Figure 3 at B. Figure 5 shows a structural diagram of a cleaning swab 10 of an embodiment of the present application. An in vitro diagnostic device provided in an embodiment of the present application includes an injection and discharge component. Specifically, the injection and discharge component includes a cleaning swab 10 and also includes an injection and discharge needle 20. The injection and discharge needle 20 can be movably arranged in the through cavity 111 up and down, and the injection and discharge needle 20 is provided with an injection channel 211 and a discharge channel 221.

[0028] Please refer to Figures 2, 4 and 5. In one embodiment, the cleaning swab 10 includes a swab body 11. The swab body 11 is provided with a through cavity 111 penetrating through two opposite ends thereof. The swab body 11 can be sleeved on the outside of the injection and drainage needle 20 through the through cavity 111, and the swab body 11 and the injection and drainage needle 20 can move up and down relative to each other. The circumferential side wall of the swab body 11 is only provided with at least one drainage portion 112 that is mutually connected with the through cavity 111, and the drainage portion 112 is used to communicate with the drainage device.

[0029] Compared with the cleaning swab 10 in the related art, the cleaning swab 10 described above is provided with only at least one liquid discharge portion 112 which is mutually connected with the through cavity 111 on the circumferential side wall of the swab body 11. In other words, it is not necessary to provide a liquid inlet portion which is mutually connected with the through cavity 111 on the circumferential side wall of the swab body 11. In this way, not only the structure of the cleaning swab 10 can be simplified, but also the parts and pipelines cooperating with the liquid inlet portion can be reduced, thereby making the device more compact. In addition, since no liquid inlet portion is provided on the circumferential side wall of the swab body 11, on the one hand, the injection and drainage needle 20 and the liquid path device connected thereto cooperate to complete their own injection and drainage functions, and on the other hand, when the cleaning swab 10 cleans the outer wall of the injection and drainage needle, the liquid inlet function is completed by reusing the same set of liquid path devices in cooperation with the injection and drainage needle, and then the outer wall of the injection and drainage needle 20 can be cleaned by the cooperation of the injection and drainage needle 20, the drainage portion 112 and the drainage device, thereby saving a set of liquid path devices and the corresponding production and manufacturing costs, and at the same time realizing the outer wall cleaning function of the injection and drainage needle.

[0030] In some embodiments, the number of the drainage portion 112 is not limited to one, but may be two, three or more. When there are multiple drainage portions 112, each drainage portion 112 is disposed on the side wall of the swab body 11 at intervals around the circumference of the swab body 11.

[0031] The cleaning swab 10 and the injection and discharge needle 20 can be mechanically driven to move relative to each other in the axial direction Z of the cavity 111;

[0032] When the injection and discharge functions of the injection and discharge needle 20 need to be completed, the injection and discharge needle 20 moves to a lower position relative to the cleaning swab 10, as shown in FIGS. 3 and 4, and completes its normal function by cooperating with the liquid path device;

[0033] When the injection and discharge needle 20 needs to be cleaned, the injection and discharge needle 20 moves to a high position relative to the cleaning swab 10, as shown in Figures 1 and 2, the injection and discharge needle 20 injects the cleaning liquid, and the discharge pipe generates negative pressure under the drive of the liquid path device, and the negative pressure acts on the cavity 111 through the discharge pipe to discharge the cleaning liquid on the outer wall of the injection and discharge needle 20. By changing the relative position of the injection and discharge needle 20 and the cleaning swab 10, various parts of the outer wall of the needle between the outlet of the injection channel 211 and the outlet of the discharge channel 221 can be cleaned.

[0034] Please refer to Figures 2, 4 and 6. In some embodiments, the liquid circuit device includes an injection device, a discharge device and a control valve. The injection device is connected to the injection channel 211 of the injection and discharge needle 20. The discharge device can generate negative pressure and play a pumping role. For example, it is connected to the control valve. The control valve is specifically a multi-way adjustment valve, such as a three-way adjustment valve, a four-way adjustment valve, etc. The control valve is respectively connected to the discharge channel 221 of the injection and discharge needle 20 and the discharge part 112 of the cleaning swab 10. In this way, when working, the injection device can inject cleaning liquid and connect to the injection channel 211. It can provide the cleaning liquid to, for example, a reaction cup, a reactant, etc. to realize the injection function of the injection and discharge needle 20 itself, and it can also inject the cleaning liquid into the inner cavity to realize the cleaning operation of the outer wall of the injection and discharge needle 20. In addition, the drainage device can generate negative pressure, and its negative pressure can meet the use requirements. When the control valve controls it to be connected with the drainage channel 221 of the injection and drainage needle 20, it can discharge the waste liquid in the drainage channel 221 of the injection and drainage needle 20, that is, it undertakes the drainage task of the injection and drainage needle 20; when the control valve controls the drainage device to be connected with the drainage part 112, it cooperates with the injection and drainage needle 20 and the injection device to form a negative pressure in the cavity 111, so that the cleaning fluid in the cavity 111 cleans the outer wall of the injection and drainage needle 20 and is discharged outward through the drainage part 112.

[0035] In some embodiments, the liquid discharge device includes but is not limited to being provided with two liquid discharge devices, and the two liquid discharge devices are respectively connected to the liquid discharge channel 221 of the liquid injection and discharge needle 20 and the liquid discharge portion 112 of the cleaning swab 10. In addition, the control valve is correspondingly provided with two control valves, for example, and the two control valves are respectively provided corresponding to the two liquid discharge devices. In this way, the two liquid discharge devices are used to respectively complete the liquid discharge operation of the liquid injection and discharge needle 20 and the liquid discharge operation of the cavity 111, that is, to respectively complete two types of tasks.

[0036] In some embodiments, the pumping direction M of the drain portion 112 is set at an angle to the axial direction Z that penetrates the cavity 111. The angle between the two includes but is not limited to 60°, 75°, 90°, 105°, 120°, etc., which can be flexibly adjusted and set according to actual needs and is not limited here.

[0037] In one embodiment, the swab body 11 is provided with an annular cavity 113 located between the drainage portion 112 and the through cavity 111 and circumferentially arranged around the through cavity 111, and the through cavity 111 is connected with the drainage portion 112 through the annular cavity 113. In this way, when the outer wall of the injection and drainage needle 20 is cleaned, the cleaning liquid inside the through cavity 111 will enter the annular cavity 113, and enter the drainage portion 112 through the annular cavity 113, and be discharged outward through the drainage portion 112.

[0038] In some embodiments, the annular cavity 113 includes but is not limited to various regular annular shapes such as a circular ring shape, an elliptical ring shape, a polygonal ring shape, and other irregular ring shapes. It can be flexibly adjusted and set according to actual needs and is not limited here.

[0039] In one embodiment, the swab body 11 further includes at least one through hole 114 disposed between the annular cavity 113 and the through cavity 111 , and the through cavity 111 is connected to the annular cavity 113 through the through hole 114 .

[0040] Specifically, a plurality of through holes 114 are provided, and each through hole 114 is sequentially spaced around the circumference of the through cavity 111. In this way, the through cavity 111 is connected with the annular cavity 113 through the plurality of through holes 114, which can facilitate the liquid inside the through cavity 111 to enter the annular cavity 113 through each through hole 114.

[0041] Please refer to FIG. 2 , FIG. 4 and FIG. 5 . In one embodiment, the swab body 11 includes a swab outer shell 115 and a swab liner 116 disposed inside the swab outer shell 115 . An opening is provided at one end of the swab outer shell 115 , and an abutting portion 1151 abutting against the swab liner 116 is provided at the other end. The swab liner 116 extends into the interior of the swab outer shell 115 through the opening and abuts against the abutting portion 1151 ; an annular groove 1161 is provided around the outer wall of the swab liner 116 , and the outer wall of the swab liner 116 abuts against the inner wall of the swab outer shell 115 , so that the annular groove 1161 cooperates with the inner wall of the swab outer shell 115 to form an annular cavity 113 . The liquid discharge portion 112 is mounted on the swab outer shell 115 . The through cavity 111 penetrates through the abutting portion 1151 and the opposite ends of the swab liner 116 . In this way, the swab body 11 is obtained by assembling the swab outer cover 115 and the swab inner liner 116 together, so that it is easy to machine, reduces the processing difficulty, and improves the production efficiency.

[0042] Specifically, each through hole 114 is formed on the swab liner 116. The through holes 114 include but are not limited to being set to four or other numbers, and each through hole 114 is arranged in turn at equal intervals around the circumference of the swab liner 116.

[0043] In some embodiments, the drain portion 112 includes but is not limited to being a drain pipe.

[0044] In some embodiments, the annular cavity 113 of the swab body 11 is not limited to being realized by the cooperation of the swab outer cover 115 and the swab liner 116, but other implementation forms are adopted, such as directly obtaining the swab body 11 by 3D printing, etc., which are not specifically limited here.

[0045] Please refer to Figures 2, 4 and 5. In one embodiment, the swab body 11 further includes a sealing ring 117 disposed between the swab liner 116 and the swab outer cover 115. The sealing ring 117 is located at one end of the swab liner 116 away from the abutment portion 1151. In this way, the sealing ring 117 plays a sealing role, which can prevent the cleaning liquid entering the through-cavity 111 from being discharged to the mounting base through the gap between the swab outer cover 115 and the swab liner 116. Specifically, the sealing ring 117 is also closely abutted against the mounting base, so as to further improve the sealing performance.

[0046] Please refer to Figures 2, 4 and 5. In one embodiment, the abutting portion 1151 is provided with a first channel 1152, and the swab liner 116 is provided with a second channel 1162 and a third channel 1163. The first channel 1152, the second channel 1162 and the third channel 1163 are sequentially connected to form the through cavity 111. The inner diameter D2 of the second channel 1162 is larger than the inner diameter D1 of the first channel 1152 and the inner diameter D3 of the third channel 1163. In this way, since the injection and drainage needle 20 can pass through the through cavity 111 formed by the first channel 1152, the second channel 1162 and the third channel 1163 respectively, the inner diameter D2 of the second channel 1162 is larger than the inner diameter D1 of the first channel 1152 and the inner diameter D3 of the third channel 1163, so that the inner wall of the second channel 1162 and the outer wall of the injection and drainage needle 20 are spaced apart, thereby preventing the outer wall of the injection and drainage needle 20 from being too close to the inner wall of the second channel 1162, resulting in capillary phenomenon and causing the cleaning liquid inside the through cavity 111 to spray outward.

[0047] In some embodiments, the axial cross-sectional shapes of the first channel 1152, the second channel 1162, and the third channel 1163 are each independently set and adjusted according to actual needs, including but not limited to regular shapes such as circles, ellipses, polygons, and other irregular shapes, which are not limited here.

[0048] In a specific embodiment, the injection and drainage needle 20 is, for example, configured as a trocar. In addition, the outer wall diameter D4 of the injection and drainage needle 20 is respectively the same as the inner diameter D1 of the first channel 1152 and the inner diameter D3 of the third channel 1163, or slightly smaller than the inner diameter D1 of the first channel 1152 and the inner diameter D3 of the third channel 1163, specifically, for example, 70% D1 to D1, including but not limited to 70% D1, 80% D1, 90% D1, 92% D1, 95% D1, 99% D1, etc., so that the injection and drainage needle 20 can smoothly pass through the first channel 1152 and the third channel 1163, and can move up and down in the through cavity 111 to adjust the position.

[0049] Referring to Figures 2, 4 and 5, in one embodiment, the injection and drainage needle 20 includes a first needle tube 21 and a second needle tube 22. The first needle tube 21 is formed with an injection channel 211, and the second needle tube 22 is formed with a drainage channel 221. The second needle tube 22 is inserted into the first needle tube 21, or the second needle tube 22 and the first needle tube 21 are arranged in parallel.

[0050] When the second needle tube 22 is inserted into the first needle tube 21, the first needle tube 21 and the second needle tube 22 are coaxially arranged, and the inner wall of the first needle tube 21 and the outer wall of the second needle tube 22 are spaced apart to form a liquid injection channel 211. In addition, when the second needle tube 22 and the first needle tube 21 are arranged side by side, the liquid injection port 212 of the first needle tube 21 is, for example, facing the outer wall of the second needle tube 22, so that a better cleaning effect can be achieved on the outer wall of the second needle tube 22.

[0051] In one embodiment, the end of the first needle tube 21 is formed with an injection port 212 connected to the injection channel 211, and the end of the second needle tube 22 is formed with a discharge port 222 connected to the discharge channel 221, and the injection port 212 and the discharge port 222 are arranged in sequence along the injection direction. In this way, the cleaning liquid discharged from the injection port 212 will flow through the outer wall of the end of the discharge port 222 of the second needle tube 22, and play a cleaning role on the outer wall of the end of the second needle tube 22.

[0052] In some embodiments, the task is implemented as follows:

[0053] The injection and discharge needle 20 is driven by the motion mechanism to descend to a low position to complete its own injection and discharge tasks; for example, on the magnetic separation mechanism of the chemiluminescence immunoassay, the waste liquid in the reaction container that needs to be cleaned is discharged and new cleaning liquid is injected (for cleaning the magnetic beads in the reaction container);

[0054] Since the second needle tube 22 is in contact with the waste liquid, the outer wall of the second needle tube 22 needs to be cleaned. At this time, the injection and discharge needle 20 is driven by the motion mechanism to rise to a high position: In addition, the injection port 212 and the discharge port 222 of the injection and discharge needle 20 are both in the through cavity 111;

[0055] The liquid injection device injects the cleaning liquid through the liquid injection port 212 of the liquid injection and drainage needle 20, and the cleaning liquid flows downward along the liquid drainage needle section of the liquid injection port 212 that is higher than the liquid drainage port 222. The liquid drainage device is connected to the liquid drainage portion 112 through a control valve or directly to generate negative pressure. Under the action of the negative pressure, the flow of the cleaning liquid is accelerated and sucked into the inside of the liquid drainage pipe by the negative pressure, thereby cleaning the outer wall of the needle near the through hole 114;

[0056] By changing the relative position relationship between the injection and discharge needle 20 and the swab body 11 , various locations of the outer wall of the injection and discharge needle 20 below the injection port 212 can be cleaned in sequence.

[0057] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0058] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0059] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0060] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A cleaning swab, characterized in that: The cleaning swab comprises: The swab body is provided with a through cavity penetrating through its two opposite ends, the swab body can be sleeved on the outside of the injection and drainage needle through the through cavity, and the swab body and the injection and drainage needle can move relative to each other up and down, and the circumferential side wall of the swab body is only provided with a drainage part that is in mutual communication with the through cavity, and the drainage part is used to communicate with the drainage device.

2. The cleaning swab according to claim 1, characterized in that: The swab body is provided with an annular cavity surrounding the through cavity, and the through cavity is communicated with the liquid discharge part through the annular cavity; and / or a plurality of liquid discharge parts may be provided.

3. The cleaning swab according to claim 2, characterized in that: The swab body further includes at least one through hole disposed between the annular cavity and the through cavity, and the through cavity is communicated with the annular cavity through the through hole.

4. The cleaning swab according to claim 2, characterized in that: The swab body comprises a swab outer shell and a swab liner arranged inside the swab outer shell; one end of the swab outer shell is provided with an opening, and the other end is provided with an abutment portion that abuts and cooperates with the swab inner shell; the swab inner shell extends into the interior of the swab outer shell through the opening and abuts with the abutment portion; an annular groove is arranged around the outer wall of the swab inner shell, and the outer wall of the swab inner shell abuts against the inner wall of the swab outer shell, so that the annular groove cooperates with the inner wall of the swab outer shell to form the annular cavity; the drainage portion is mounted on the swab outer shell; the through cavity respectively penetrates the abutment portion and the opposite ends of the swab inner shell.

5. The cleaning swab according to claim 4, characterized in that: The swab body further comprises a sealing ring arranged between the swab liner and the swab outer shell, wherein the sealing ring is located at one end of the swab liner away from the abutting portion.

6. The cleaning swab according to claim 4, characterized in that: The abutting portion is provided with a first channel, and the swab liner is provided with a second channel and a third channel. The first channel, the second channel and the third channel are connected in sequence to form the through cavity; the inner diameter D2 of the second channel is respectively larger than the inner diameter D1 of the first channel and the inner diameter D3 of the third channel.

7. A liquid injection and discharge assembly, characterized in that: The injection and drainage component includes the cleaning swab according to any one of claims 1 to 6, and also includes an injection and drainage needle, which is movably arranged in the through cavity up and down, and is provided with an injection channel and a drainage channel.

8. The liquid injection and drainage assembly according to claim 7, characterized in that: The injection and drainage needle includes a first needle tube and a second needle tube. The first needle tube forms the injection channel, and the second needle tube forms the drainage channel. The second needle tube is inserted into the first needle tube, or the second needle tube is arranged in parallel with the first needle tube.

9. The liquid injection and drainage assembly according to claim 8, characterized in that: The end of the first needle tube is formed with an injection port connected to the injection channel, and the end of the second needle tube is formed with a discharge port connected to the discharge channel. The injection port and the discharge port are sequentially arranged along the injection direction.

10. An in vitro diagnostic device, characterized in that: The in vitro diagnostic device comprises the injection and drainage assembly according to any one of claims 7 to 9.

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