Counting chamber

Abstract

The utility model discloses a counting chamber which comprises a shell, the shell comprises an upper cover and a bottom plate which are connected with each other, the upper cover and the bottom plate jointly form an inner cavity used for containing a sample, the inner cavity comprises a first sub inner cavity and a second sub inner cavity, and the height of the first sub inner cavity is smaller than that of the second sub inner cavity. The first sub-inner cavity and the second sub-inner cavity are at least partially communicated with each other, the upper cover and / or the bottom plate are / is provided with a window, and the window is used for imaging a sample in the inner cavity by an imaging mechanism; the upper cover is further provided with a sample inlet and an exhaust port, the sample inlet is communicated with the first sub inner cavity and used for allowing a sample to enter the first sub inner cavity, and the exhaust port is communicated with the second sub inner cavity and used for allowing gas and the sample to be discharged out of the inner cavity. According to the utility model, bubbles can be at least prevented from being retained in the first sub-inner cavity.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a counting pool. Background Technology

[0002] In fields such as life sciences, medicine and health, food, and environmental protection, it is often necessary to perform image or counting analysis on liquids and their components. This typically involves using a flat, transparent counting cell. After the liquid sample is injected, it undergoes a process (such as natural sedimentation or centrifugal sedimentation) to allow the particles in the liquid sample to settle to the bottom of the cell before being photographed and counted. The counting cell includes a housing with an inner cavity for containing the sample, and an inlet and an outlet connecting the inner cavity. The sample enters the inner cavity through the inlet and exits through the outlet. However, for counting cells with cavities of varying depths, air bubbles can easily become trapped within the cavities at different depths, affecting the detection process. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a counting cell that can reduce the retention of air bubbles.

[0004] According to the counting cell in the first embodiment of the present invention, a housing is included. The housing includes an upper cover and a bottom plate connected to each other. The upper cover and the bottom plate together form an inner cavity for accommodating a sample. The inner cavity includes a first sub-inner cavity and a second sub-inner cavity. The height of the first sub-inner cavity is less than the height of the second sub-inner cavity. The first sub-inner cavity and the second sub-inner cavity are at least partially interconnected. The upper cover and / or the bottom plate have a viewing window for an imaging mechanism to image the sample in the inner cavity.

[0005] The upper cover also has a sample inlet and an exhaust outlet. The sample inlet is connected to the first sub-cavity and is used to allow the sample to enter the first sub-cavity. The exhaust outlet is connected to the second sub-cavity and is used to allow gas and the sample to exit the cavity.

[0006] The counting cell according to the embodiments of this utility model has at least the following beneficial effects:

[0007] In this embodiment, the inlet is connected to the first sub-cavity and the outlet is connected to the second sub-cavity, which is to say, the "thin area inlet and thick area outlet" scheme is adopted. Since the height of the first sub-cavity is small, when the liquid flows in the first sub-cavity, it tends to fill the first sub-cavity first and then flow from the first sub-cavity to the second sub-cavity. Therefore, this embodiment can at least avoid the retention of air bubbles in the first sub-cavity.

[0008] In other embodiments of this utility model, the bottom surface of the first sub-cavity is parallel to the bottom surface of the second sub-cavity, and the bottom surface of the first sub-cavity is higher than the bottom surface of the second sub-cavity; preferably, the top surface of the first sub-cavity and the top surface of the second sub-cavity are on the same plane.

[0009] Alternatively, the top surface of the first sub-cavity is parallel to the top surface of the second sub-cavity, and the top surface of the first sub-cavity is lower than the top surface of the second sub-cavity; preferably, the bottom surface of the first sub-cavity and the bottom surface of the second sub-cavity are on the same plane.

[0010] In other embodiments of this utility model, the bottom surface and top surface of the first sub-cavity are mutually parallel planes, and / or the bottom surface and top surface of the second sub-cavity are mutually parallel planes.

[0011] In other embodiments of this utility model, the projection of the injection port on the bottom surface of the housing at least partially coincides with the projection of the inner cavity on the bottom surface of the housing, preferably, the injection port is located at a corner of the inner cavity; and / or, the projection of the exhaust port on the bottom surface of the housing at least partially coincides with the projection of the inner cavity on the bottom surface of the housing, preferably, the exhaust port is located at a corner of the inner cavity.

[0012] In other embodiments of this utility model, the first sub-cavity has a first connecting port leading to the sample inlet, the first sub-cavity is approximately fan-shaped, and the first connecting port is located in the central region of the fan-shaped cavity; or, the first sub-cavity is approximately triangular in shape, and the first connecting port is located in the vertex region of the triangle.

[0013] In other embodiments of this utility model, the first sub-cavity is disposed at the corner of the cavity;

[0014] Alternatively, the first sub-cavity is disposed on one side of the cavity and located between the two corners of the cavity corresponding to the two ends of the side edge;

[0015] Alternatively, the first sub-cavity is disposed on one side of the cavity, and the two ends of the first sub-cavity extend to the two corners of the cavity corresponding to the two ends of the side edge.

[0016] In other embodiments of this utility model, the bottom and / or top surfaces of the inner cavity are provided with markings; preferably, the markings are provided at the corners of the inner cavity.

[0017] In other embodiments of the present invention, the top surface of the housing is provided with a first groove, the projection of the window on the top surface is located within the projection of the first groove on the top surface, or coincides with the projection of the first groove, and / or, the bottom surface of the housing is provided with a second groove, the projection of the inner cavity on the bottom surface is located within the projection of the second groove on the bottom surface, or coincides with the projection of the second groove.

[0018] In other embodiments of this utility model, the housing is provided with a first anti-mistake structure, which is configured to cooperate with an external second anti-mistake mechanism to place the counting pool in a set posture; preferably, the anti-mistake structure is provided on the side of the housing, and the anti-mistake structure is offset from the central axis of the side perpendicular to its extension direction, or the anti-mistake structure is provided on both adjacent sides of the housing.

[0019] More preferably, the foolproof structure is configured as a third groove.

[0020] In other embodiments of this utility model, a positioning structure is provided on the top surface of the housing, and the positioning structure is configured to cooperate with an external positioning mechanism to limit the displacement of the counting pool along a set direction; preferably, the positioning structure is provided on the top surface of the housing; preferably, the positioning structure is configured as a fourth groove.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 This is a top view of the counting cell in one embodiment of the present invention;

[0024] Figure 2 for Figure 1 A top view of the internal structure of the middle counting cell is shown.

[0025] Figure 3 for Figure 1 A cross-sectional view along the AA direction;

[0026] Figure 4 for Figure 3 Enlarged view of region B in the middle;

[0027] Figure 5 for Figure 1 A schematic diagram of the decomposed counting cell;

[0028] Figure 6This is a simplified schematic diagram of the counting cell in another embodiment of the present invention;

[0029] Figure 7 This is a simplified schematic diagram of the counting cell in another embodiment of the present invention.

[0030] Figure label:

[0031] Counting pool 10;

[0032] Shell 100, inlet 101, outlet 102, window 103, inner cavity 104, marking 1041, first sub-inner cavity 105, first connecting port 1051, second sub-inner cavity 106, second connecting port 1061, first flow channel 107, second flow channel 108, first foolproof structure 109, positioning structure 1010, first area 100a, second area 100b, top cover 110, first groove 111, bottom plate 120, second groove 121. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0036] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0037] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] As mentioned earlier, for counting cells with cavities of different depths, air bubbles are easily trapped in the cavities when the fluid flows through them, affecting the detection. Therefore, this invention proposes a counting cell that can improve the problem of air bubble trapping, which will be described below with reference to the accompanying drawings and specific embodiments.

[0039] Reference Figures 1 to 5 The diagram shows a top view of the counting cell 10 in the first embodiment of the present invention, a top view showing the internal structure of the display portion, and a top view along the [unclear text - possibly a diagram or diagram]. Figure 1 The figure shows a cross-sectional view of section AA, a partially enlarged view of the cross-sectional view, and an exploded view. As shown in the figure, the counting cell 10 includes a housing 100, which has a sample inlet 101, an exhaust port 102, and a viewing window 103. The housing 100 defines an inner cavity 104, which is used to contain samples such as urine. The viewing window 103 is used for imaging the sample in the inner cavity 104 by an imaging mechanism. The sample inlet 101 is used to allow the sample to enter the inner cavity 104, and the exhaust port 102 is used to allow gas and the sample to exit the inner cavity 104.

[0040] Reference Figure 3 and Figure 5 In some specific embodiments, the housing 100 adopts a split structure. For example, the housing 100 includes an upper cover 110 and a bottom plate 120. When the counting cell 10 is in normal use, the upper cover 110 is disposed on the upper side of the bottom plate 120, and the two are connected by means such as ultrasonic welding. Based on this, the inner cavity 104 is defined by the upper cover 110 and the bottom plate 120. In some specific embodiments, the upper cover 110 is provided with a groove, and the bottom plate 120 is sealed within the groove, thereby forming the inner cavity 104 through the groove on the upper cover 110. In other specific embodiments, the bottom plate 120 is provided with a groove, and the upper cover 110 is sealed within the groove, thereby forming the inner cavity 104 through the groove on the bottom plate 120. In still other specific embodiments, both the upper cover 110 and the bottom plate 120 are provided with grooves, and the grooves of the two together form the inner cavity 104.

[0041] To facilitate sample addition and venting, the sample inlet 101 and the inner cavity 104 can be disposed on the upper cover 110. For example, both are disposed on the upper surface of the upper cover 110, thereby facilitating sample addition by a sample addition component, such as a sample addition needle, from the upper side of the sample inlet 101, and sample extraction by a sample removal component, such as a sample extraction needle, from the venting port 102. Furthermore, to enable the imaging mechanism to acquire an image of the sample in the inner cavity, the housing 100 is at least partially translucent in the viewing window 103. For example, the entire housing 100 is a transparent structure, so that when the imaging mechanism images through the viewing window 103, a light source can illuminate the inner cavity from the opposite side of the viewing window 103, thereby facilitating the formation of a clear image. In some specific embodiments, the viewing window 103 is located on the lower side of the housing 100, for example, on the lower side of the base plate 120; in other specific embodiments, the viewing window 103 is located on the upper side of the housing 100, for example, on the upper side of the upper cover 110. It should be noted that the housing 100 typically has a clear boundary line to mark the extent of the viewing window 103, such as the first groove 111 which will be mentioned in later embodiments. In some specific embodiments, the extent of the viewing window 103 may coincide with the extent of the inner cavity 104, or it may be smaller than the extent of the inner cavity 104.

[0042] Reference Figures 1 to 4 The inner cavity 104 includes a first sub-inner cavity 105 and a second sub-inner cavity 106. The height of the first sub-inner cavity 105 is smaller than the height of the second sub-inner cavity 106 (for ease of understanding, these are referred to as the thin region and the thick region, respectively). Thus, the lower height of the first sub-inner cavity 105 results in a smaller volume of liquid per unit area, leading to a smaller total number of particles to be analyzed within the liquid, which may result in missed detections. However, the particles are less likely to stack, facilitating accurate counting. Conversely, the higher height of the second sub-inner cavity 106 allows for a larger volume of liquid per unit area, thus increasing the total number of particles to be analyzed within the liquid. The large number of particles to be analyzed reduces the false negative rate; however, excessively high particle concentrations can lead to particle stacking, affecting the accuracy of counting. This embodiment addresses this by using cavities of different heights. Depending on the specific circumstances, it can choose to image the sample within the first sub-cavity 105 and obtain analysis results based on the image information; or it can choose to image the sample within the second sub-cavity 106 and obtain analysis results based on the image information; or it can choose to image the samples within the first sub-cavity 105 and the samples within the second sub-cavity 106 separately and obtain analysis results by combining the image information from both. In some specific embodiments, the height of the first sub-cavity 105 is no greater than 1 mm; further, the height of the first sub-cavity 105 is no greater than 0.5 mm.

[0043] As mentioned earlier, when there is a height difference between the first sub-cavity 105 and the second sub-cavity 106, when the sample flows from one sub-cavity to the other, air bubbles may become trapped at certain locations in the cavity 104, affecting subsequent counting. Figure 1 Taking an example, if the positions of the first flow channel 107 and the second flow channel 108 are interchanged, that is, if the "thick area injection, thin area effluent" scheme is adopted, since the height of the second sub-cavity 106 is relatively large, the flow of liquid in the second sub-cavity 106 is mainly affected by the liquid pressure. It will follow the path of least flow resistance between the first flow channel 107 and the second flow channel 108 (e.g., the shortest path, i.e.) Figure 1 The liquid quickly reaches the second flow channel 108 from the lower side of the first sub-cavity 105, thereby establishing a relatively stable flow channel. If air bubbles still exist in other parts of the first sub-cavity 105 and the second sub-cavity 106 at this time (e.g., the upper side of the first sub-cavity 105, the upper side of the second sub-cavity 106, etc.), the air bubbles will be trapped here. Based on this, this embodiment connects the inlet 101 to the first sub-cavity 105 and the outlet 106 to the second sub-cavity 106, that is, adopts the "thin area inlet, thick area outlet" scheme. Since the height of the first sub-cavity 105 is small, the flow of liquid in the first sub-cavity 105 is mainly affected by capillary action. Unlike the usual situation driven by liquid pressure, when the liquid flows in the first sub-cavity 105, it tends to fill the first sub-cavity 105 first, and then flow from the first sub-cavity 105 to the second sub-cavity 106. Therefore, this embodiment can at least avoid the trapping of air bubbles in the first sub-cavity 105.

[0044] Based on the first embodiment, in some embodiments of this utility model, reference is made to Figure 3 , Figure 4 The top surface of the first sub-cavity 105 is parallel to the top surface of the second sub-cavity 106, and the top surface of the first sub-cavity 105 is lower than the top surface of the second sub-cavity 106, thus making the height of the first sub-cavity 105 less than the height of the second sub-cavity 106. For example, a boss structure facing the bottom plate 120 can be provided on the upper cover 110 at a position corresponding to the first sub-cavity 105. In some specific embodiments, the bottom surface of the first sub-cavity 105 and the bottom surface of the second sub-cavity 106 are on the same plane.

[0045] In other embodiments, the bottom surface of the first sub-cavity 105 is parallel to the bottom surface of the second sub-cavity 106, and the bottom surface of the first sub-cavity 105 is higher than the bottom surface of the second sub-cavity 106, thereby making the height of the first sub-cavity 105 less than the height of the second sub-cavity 106. For example, a boss structure facing the upper cover 110 can be provided on the base plate 120 at a position corresponding to the first sub-cavity 105. In some specific embodiments, the top surface of the first sub-cavity 105 and the top surface of the second sub-cavity 106 are on the same plane.

[0046] Based on the first embodiment, in some embodiments of this utility model, reference is made to Figure 3 , Figure 4The bottom and top surfaces of the first sub-cavity 105 are parallel planes, meaning the height of the first sub-cavity 105 is constant, which helps reduce molding difficulty. In some specific embodiments, the bottom and top surfaces of the first sub-cavity 105 are both parallel to the horizontal plane. In other embodiments, the bottom and top surfaces of the second sub-cavity 106 are parallel planes, meaning the height of the first sub-cavity 105 is constant, which helps reduce molding difficulty. In some specific embodiments, the bottom and top surfaces of the second sub-cavity 106 are both parallel to the horizontal plane.

[0047] Based on the first embodiment, in some embodiments of this utility model, the projection of the inlet 101 on the bottom surface of the housing 100 at least partially overlaps with the projection of the inner cavity 104 on the bottom surface of the housing 100. In some specific embodiments, the projection of the inlet 101 is completely located within the projection of the inner cavity 104. For example, a through hole is formed in the upper cover 110, the through hole forms the inlet 101 on the upper surface of the upper cover 110, and a first sub-inner cavity 105 is formed on the lower surface for connecting the first connecting port 1051 of the inlet 101. In other specific embodiments, the inlet 101 is located at the corner of the inner cavity 104, so that when the imaging mechanism images from above the housing 100, the inlet 101 can be prevented from affecting the imaging of the imaging mechanism.

[0048] In other embodiments, the projection of the exhaust port 102 onto the bottom surface of the housing 100 at least partially overlaps with the projection of the inner cavity 104 onto the bottom surface of the housing 100. In some specific embodiments, the projection of the exhaust port 102 is completely within the projection of the inner cavity 104. For example, a through hole is formed in the bottom plate 120, the exhaust port 102 is formed on the lower surface of the bottom plate 120, and a second sub-inner cavity 106 is formed on the upper surface for connecting the exhaust port 102 to the second connecting port 1061. In other specific embodiments, the exhaust port 102 is located at the corner of the inner cavity 104, so that when the imaging mechanism images from above the housing 100, the exhaust port 102 can be prevented from affecting the imaging of the imaging mechanism.

[0049] It should be noted that in some other embodiments, the projections of the inlet 101 and / or the outlet 102 may not overlap with the projection of the inner cavity 104. For example, refer to Figure 2 The shell 100 is at least divided into a first region 100a and a second region 100b (for ease of understanding, Figure 2In the diagram, the double-dotted line roughly indicates the boundary between the two regions. The first region 100a and the second region 100b are arranged side by side so that they do not overlap in the height direction of the inner cavity 104. For example, when the counting cell 10 is in normal use, the first region 100a and the second region 100b are arranged side by side in the horizontal direction. The inner cavity 104 and the viewing window 103 are located in the first region 100a, while the sample inlet 101 and the exhaust port 102 are located in the second region 100b. At this time, since the sample inlet 101, the exhaust port 102, and the inner cavity 104 are respectively located in different regions, the housing 100 also forms a first flow channel 107 and a second flow channel 108. The sample inlet 101 can communicate with the inner cavity 104 through the first flow channel 107, and the exhaust port 102 can communicate with the inner cavity 104 through the second flow channel 108.

[0050] Based on the first embodiment, in some embodiments of this utility model, reference is made to Figure 2 The first sub-cavity 105 has a first connecting port 1051 communicating with the first flow channel 107. The first sub-cavity 105 is approximately fan-shaped, and the first connecting port 1051 is located in the central region of the fan. Thus, the shape of the first sub-cavity 105 conforms to the sample diffusion trend, making it easier for the first sub-cavity 105 to be filled. It should be noted that the term "approximately fan-shaped" in this embodiment should include standard fan shapes and cases approximating fan shapes. For example, replacing the arc segment of a standard fan shape with a combination of convex line segments formed by multiple straight line segments, or a combination of convex line segments formed by straight line segments and arc segments, or a combination of convex line segments formed by arc segments with different curvatures, should all be included within the term "approximately fan-shaped" in this embodiment. Furthermore, this embodiment does not limit the size of the fan angle; it can be as follows: Figure 2 The angle shown is 90°, but it can be any other angle.

[0051] In other embodiments, the first sub-cavity 105 is approximately triangular in shape, with the first connecting port 1051 located at the vertex of the triangle. This shape aligns with the sample diffusion trend, making the first sub-cavity 105 easier to fill. It should be noted that the term "approximately triangular in shape" in this embodiment should include both standard triangles and near-triangular cases. For example, replacing the straight segments opposite the first connecting port 1051 in a standard triangle with a combination of concave line segments formed by multiple straight segments, or a combination of concave line segments formed by straight segments and arc segments, or a combination of concave line segments formed by arc segments with different curvatures, should all be included within the "approximately triangular in shape" definition in this embodiment.

[0052] Based on the first embodiment, in some embodiments of this utility model, reference is made to Figure 2The first sub-cavity 105 is located at the corner of the inner cavity 104, that is, the first sub-cavity 105 extends to the adjacent side of the inner cavity 104. For example, the first sub-cavity 105 is located at the lower left corner of the inner cavity 104, extending to the left and lower sides of the inner cavity 104. Based on this, when the shape of the first sub-cavity 105 is approximately fan-shaped, the first connecting opening 1051 is located in the central region of the fan shape, including any one of the cases where the first connecting opening 1051 is located on an adjacent side of the inner cavity 104. For example... Figure 2 The first connecting port 1051 can be located either at the lower left end of the inner cavity 104 or at the lower left end of the inner cavity 104.

[0053] In other embodiments, reference is made to Figure 6 The first sub-cavity 105 is disposed on one side of the cavity 104 and located between the two corners of the cavity 104 corresponding to the two ends of the side edge. In this embodiment, when the exhaust port 102 is connected to the second sub-cavity 106 through the second flow channel 108, the second connecting port 1061 of the second sub-cavity 106 for connecting with the second flow channel 108 can be disposed on the opposite side of the first connecting port 1051, thereby reducing the path difference of the sample flowing from the left to the second connecting port 1061 and from the right to the second connecting port 1061, which helps to reduce the retention of bubbles.

[0054] In other embodiments, reference is made to Figure 7 The first sub-cavity 105 is disposed on one side of the cavity 104, and the two ends of the first sub-cavity 105 extend to the two corners of the cavity 104 corresponding to the two ends of the side edge. That is, the first sub-cavity 105 and the second sub-cavity 106 are typically arranged side by side. For example, the first sub-cavity 105 is disposed on the left side of the cavity 104, and the second sub-cavity 106 is disposed on the right side of the cavity 104.

[0055] Based on the first embodiment, in some embodiments of this utility model, reference is made to Figure 2 , Figure 5 The bottom and / or top surfaces of the inner cavity 104 are provided with a mark 1041. The mark 1041 can be used for focusing by the imaging mechanism. For example, when the imaging mechanism is a microscope, if the mark 1041 is clear enough in the field of view of the microscope, it means that the microscope has been successfully focused. On the other hand, the mark 1041 can also be used for positioning. The actual imaging area of ​​the microscope is a local area within the viewing window 103, and the housing 100 is usually made of transparent material. It is difficult to position directly without the help of a corresponding reference. The mark 1041 in this embodiment can be used as a positioning reference. Specifically, when the mark 1041 appears in the field of view of the microscope, the imaging area can be located by looking for it in the vicinity.

[0056] In some specific embodiments, the area of ​​the second sub-cavity 106 is usually larger than the area of ​​the first sub-cavity 105. Therefore, the positioning difficulty of the shooting area corresponding to the second sub-cavity 106 is also greater than the positioning difficulty of the first sub-cavity 105. Based on this, the identifier 1041 can be set in the second sub-cavity 106.

[0057] In some specific embodiments, the microscope imaging area is usually located in the middle area of ​​the viewing window 103. In order not to affect the microscope imaging, the mark 1041 is set at the corner of the inner cavity 104.

[0058] In some specific embodiments, identifier 1041 can be an array of multiple fine protrusions formed from the bottom and / or top surface of the inner cavity 104.

[0059] Based on the first embodiment, in some embodiments of this utility model, reference is made to Figure 1 The top surface of the housing 100 is provided with a first groove 111. The projection of the window 103 on the top surface is located within the projection of the first groove 111 on the top surface, or coincides with the projection of the first groove 111. In this way, when the counting cells 10 are stacked, the upper surface can be prevented from being scratched and affecting the light transmittance. When the window 103 is set on the top surface, the first groove 111 can also mark the range of the window 103. In addition, the first groove 111 can also reduce the thickness of the upper cell body of the inner cavity 104, thereby increasing the light transmittance.

[0060] In other embodiments, reference is made to Figure 3 The bottom surface of the housing 100 is provided with a second groove 121. The projection of the inner cavity 104 on the bottom surface is located within the projection of the second groove 121 on the top surface, or coincides with the projection of the second groove 121. In this way, when the counting cells 10 are stacked or slide on the table, the lower surface can be prevented from being scratched and affecting the light transmittance. When the window 103 is set on the bottom surface, the second groove 121 can also mark the range of the window 103. In addition, the second groove 121 can also reduce the thickness of the lower cell body of the inner cavity 104, thereby increasing the light transmittance.

[0061] Based on the first embodiment, in some embodiments of this utility model, reference is made to Figure 1 , Figure 5 The housing 100 is provided with a first foolproof structure 109, which is configured to cooperate with an external second foolproof mechanism (e.g., a foolproof mechanism on an analyzer) to position the counting cell 10 in a predetermined orientation. In some embodiments, a foolproof structure is provided on the side of the housing 100, offset from the central axis perpendicular to its extension direction, which can reduce the number of foolproof structures. For example... Figure 1The foolproof structure is located on the lower side of the housing 100 and is offset from the central axis L. It should be noted that the foolproof structure being offset from the central axis perpendicular to the extension direction of this side means that the foolproof structure and the central axis are located on one side of the central axis of this side.

[0062] In some other embodiments, the housing 100 is provided with a foolproof structure on both adjacent sides, which can also play a foolproof role. In this embodiment, it is not restricted that the foolproof structure must be deviated from the central axis of the side perpendicular to its extension direction.

[0063] In the above embodiments, the foolproof structure can be set as a third groove, so as to avoid forming a protruding structure on the housing 100 and facilitate the storage of the counting pool 10.

[0064] Based on the first embodiment, in some embodiments of this utility model, reference is made to Figure 1 , Figure 5 The top surface of the housing 100 is provided with a positioning structure 1010. The positioning structure 1010 is configured to cooperate with an external positioning mechanism to limit the displacement of the counting cell 10 along a set direction. For example, the positioning structure 1010 can cooperate with a robotic arm on the analyzer to limit the displacement of the counting cell 10 along a set direction. Figure 2 The displacement is in the vertical direction. In some specific embodiments, the positioning structure 1010 is disposed on the top surface of the housing 100 to facilitate cooperation with the robotic arm on the analyzer. In some specific embodiments, the positioning structure 1010 is configured as a fourth groove, thus avoiding the formation of a protruding structure on the housing 100 and facilitating the storage of the counting cell 10.

[0065] It should be noted that the first sub-cavity 105 and the second sub-cavity 106 of this utility model are not limited to the configurations shown in the above figures. Specifically, except for the height, this utility model does not limit the first sub-cavity 105 and the second sub-cavity 106. The area of ​​the first sub-cavity 105 can be greater than, less than, or equal to the area of ​​the second sub-cavity 106. The first sub-cavity 105 and the second sub-cavity 106 can also adopt other shapes besides those shown in the foregoing embodiments. The number of the first sub-cavity 105 and the second sub-cavity 106 can be one or more, and the number of the first sub-cavity 105 and the second sub-cavity 106 can be equal or unequal.

[0066] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A counting cell, characterized in that, The device includes a housing, which comprises an interconnected upper cover and a bottom plate. The upper cover and the bottom plate together form an inner cavity for accommodating a sample. The inner cavity includes a first sub-inner cavity and a second sub-inner cavity. The height of the first sub-inner cavity is less than the height of the second sub-inner cavity. The first sub-inner cavity and the second sub-inner cavity are at least partially interconnected. The upper cover and / or the bottom plate have a viewing window for an imaging mechanism to image the sample in the inner cavity. The upper cover also has a sample inlet and an exhaust outlet. The sample inlet is connected to the first sub-cavity and is used to allow the sample to enter the first sub-cavity. The exhaust outlet is connected to the second sub-cavity and is used to allow gas and the sample to exit the cavity.

2. The counting cell according to claim 1, characterized in that, The bottom surface of the first sub-cavity is parallel to the bottom surface of the second sub-cavity, and the bottom surface of the first sub-cavity is higher than the bottom surface of the second sub-cavity.

3. The counting cell according to claim 2, characterized in that, The top surface of the first sub-cavity and the top surface of the second sub-cavity are on the same plane.

4. The counting cell according to claim 1, characterized in that, The top surface of the first sub-cavity is parallel to the top surface of the second sub-cavity, and the top surface of the first sub-cavity is lower than the top surface of the second sub-cavity.

5. The counting cell according to claim 4, characterized in that, The bottom surface of the first sub-cavity and the bottom surface of the second sub-cavity are on the same plane.

6. The counting cell according to claim 1, characterized in that, The bottom and top surfaces of the first sub-cavity are parallel planes, and / or the bottom and top surfaces of the second sub-cavity are parallel planes.

7. The counting cell according to claim 1, characterized in that, The projection of the injection port on the bottom surface of the housing at least partially coincides with the projection of the inner cavity on the bottom surface of the housing.

8. The counting cell according to claim 7, characterized in that, The injection port is located at the corner of the inner cavity.

9. The counting cell according to claim 1, characterized in that, The projection of the exhaust port on the bottom surface of the housing at least partially coincides with the projection of the inner cavity on the bottom surface of the housing.

10. The counting cell according to claim 9, characterized in that, The exhaust port is located at the corner of the inner cavity.

11. The counting cell according to claim 1, characterized in that, The first sub-cavity has a first connecting port leading to the injection port. The first sub-cavity is approximately fan-shaped, and the first connecting port is located in the central region of the fan-shaped cavity. Alternatively, the first sub-cavity is approximately triangular in shape, and the first connecting port is located in the vertex region of the triangle.

12. The counting cell according to claim 1, characterized in that, The first sub-cavity is located at the corner of the cavity; Alternatively, the first sub-cavity is disposed on one side of the cavity and located between the two corners of the cavity corresponding to the two ends of the side edge; Alternatively, the first sub-cavity is disposed on one side of the cavity, and the two ends of the first sub-cavity extend to the two corners of the cavity corresponding to the two ends of the side edge.

13. The counting cell according to claim 1, characterized in that, The bottom and / or top surfaces of the inner cavity are marked.

14. The counting cell according to claim 13, characterized in that, The marking is located at the corner of the inner cavity.

15. The counting cell according to claim 1, characterized in that, The top surface of the housing is provided with a first groove, and the projection of the window on the top surface is located within the projection of the first groove on the top surface, or coincides with the projection of the first groove, and / or the bottom surface of the housing is provided with a second groove, and the projection of the inner cavity on the bottom surface is located within the projection of the second groove on the bottom surface, or coincides with the projection of the second groove.

16. The counting cell according to claim 1, characterized in that, The housing is provided with a first foolproof structure, which is configured to cooperate with an external second foolproof mechanism to place the counting pool in a set posture.

17. The counting cell according to claim 16, characterized in that, The mis-proof structure is provided on the side of the housing, and the mis-proof structure is offset from the central axis of the side perpendicular to its extension direction, or the mis-proof structure is provided on both adjacent sides of the housing.

18. The counting cell according to claim 17, characterized in that, The foolproof structure is configured as a third groove.

19. The counting cell according to claim 1, characterized in that, The top surface of the housing is provided with a positioning structure, which is configured to cooperate with an external positioning mechanism to limit the displacement of the counting cell along a set direction.

20. The counting cell according to claim 19, characterized in that, The positioning structure is disposed on the top surface of the housing.

21. The counting cell according to claim 19, characterized in that, The positioning structure is configured as a fourth groove.

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