CN217879009U

CN217879009U - Sample testing device

Info

Publication number: CN217879009U
Application number: CN202221111212.3U
Authority: CN
Inventors: 黄高祥; 李国霞; 章星; 庄镇伟; 赵志翔
Original assignee: Edan Instruments Inc
Current assignee: Edan Instruments Inc
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-11-22
Anticipated expiration: 2032-05-09

Abstract

The application provides a sample testing device, which comprises a base and a cover body arranged on one side of the base; a first containing cavity and a second containing cavity which are not communicated with each other are formed between the base and the cover body, a first inlet and a first outlet which are communicated with the first containing cavity are arranged on the base and/or the cover body, a second inlet which is communicated with the second containing cavity is arranged on the base and/or the cover body, and a first electrode group exposed in the first containing cavity is arranged on the base and/or the cover body; and a second electrode group exposed to the second cavity is arranged on the base and/or the cover body. The application provides a sample testing device, first appearance chamber and the second appearance chamber that forms each other not intercommunicating through base and lid cooperation to set up the first entry and the first export that communicate the first appearance chamber and the second entry that communicates the second appearance chamber, make test solution can flow in the sample testing device that flows out from first entry and first export, can reduce sample testing device's volume, can improve sample testing device's measurement number of times simultaneously, the efficiency of software testing is high.

Description

Sample testing device

Technical Field

The application relates to the technical field of medical equipment, in particular to a sample testing device.

Background

The sample testing device may perform a test on a sample, e.g., a blood sample, such as, for example, pH, hematocrit, ion concentration (K +, na +, cl-, ca) ₂ (+) glucose, lactic acid, and O ₂ 、CO ₂ And detecting parameters such as partial pressure and the like. The related art sample testing device is used a limited number of times.

SUMMERY OF THE UTILITY MODEL

The present application is directed to a sample testing device, which solves the problem of limited number of uses of the sample testing device in the related art.

The application provides a sample testing device, which comprises a base and a cover body arranged on one side of the base; a first cavity and a second cavity which are not communicated with each other are formed between the base and the cover, a first inlet and a first outlet which are communicated with the first cavity are arranged on the base and/or the cover, a second inlet which is communicated with the second cavity is arranged on the base and/or the cover, and a first electrode group exposed to the first cavity is arranged on the base and/or the cover; and a second electrode group exposed to the second cavity is arranged on the base and/or the cover body.

The application provides a sample testing device, first appearance chamber and the second appearance chamber that does not communicate each other is formed through base and lid cooperation, and set up the first entry and the first export that communicate the first appearance chamber, and the second entry that communicates the second appearance chamber, make test solution can flow into the sample testing device that flows in from first entry and first export, can not store inside sample testing device, can greatly reduce sample testing device's volume, make sample testing device can realize many times repeated measurement simultaneously, sample testing device's measurement number of times has greatly been improved, need not frequent change sample testing device, the efficiency of software testing is high. In addition, the reference liquid can flow into the second cavity from the second inlet, and a container for containing the reference liquid is not required to be additionally arranged, so that the structure is simple.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic diagram of the construction of a sample testing device according to some embodiments of the present application;

FIG. 2 is a schematic illustration of the structure of a box dam in some embodiments of the present application;

FIG. 3 is a schematic illustration of the configuration of the dam in accordance with some embodiments of the present application;

FIG. 4 is a schematic view of a sample testing device according to further embodiments of the present application;

FIG. 5 is a schematic view of a sample testing device according to further embodiments of the present application;

FIG. 6 is a schematic, disassembled structure of the sample testing device of the embodiment of FIG. 5;

FIG. 7 isbase:Sub>A schematic sectional view of the sample testing device in the embodiment of FIG. 5 along the line A-A;

FIG. 8 is a schematic, exploded view of a first adapter assembly in some embodiments of the present application;

fig. 9 is a schematic, exploded view of a second lead assembly in some embodiments of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1, fig. 1 is a schematic diagram of a sample testing device 100 according to some embodiments of the present disclosure, the sample testing device 100 generally includes a base 10 and a cover 20 disposed on one side of the base 10. A first cavity 110 and a second cavity 120 which are not communicated with each other are formed between the base 10 and the cover 20, a first inlet 201 and a first outlet 202 which are communicated with the first cavity 110 are arranged on the base 10 and/or the cover 20, a second inlet 101 which is communicated with the second cavity 120 is arranged on the base 10 and/or the cover 20, and a first electrode group 301 exposed to the first cavity 110 is arranged on the base 10 and/or the cover 20; the base 10 and/or the cover 20 are provided with a second electrode group 302 exposed to the second cavity 120.

It is noted that the terms "first", "second", etc. are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second" may explicitly or implicitly include one or more of the described features.

Specifically, the base 10 generally includes a first surface 10a and a second surface 10b opposite to each other, and the cover 20 is disposed on one side of the second surface 10b of the base 10. Further, the second surface 10b of the base 10 is formed with an accommodating groove 102, and the cover 20 is disposed at an opening of the accommodating groove 102 or accommodated in the accommodating groove 102, so that the cover 20 and the accommodating groove 102 cooperate to form an approximately or completely sealed accommodating space. Preferably, the cover 20 is accommodated in the accommodating groove 102, and the shape of the outer periphery of the cover 20 is matched with the shape of the side wall of the accommodating groove 102.

In an embodiment, a dam 30 is disposed on the base 10 and/or the cover 20, the dam 30 is disposed between the base 10 and the cover 20 and located in the accommodating space to divide the accommodating space into a first accommodating cavity 110 and a second accommodating cavity 120 that are not connected to each other, that is, the dam 30, the base 10 and the cover 20 are cooperatively disposed to form the first accommodating cavity 110 and the second accommodating cavity 120. It should be understood that the non-communication means that the biomacromolecule substances in the first and

second cavities

110 and 120 can not freely flow, and the ion flow in the first and

second cavities

110 and 120 is not limited, i.e. the liquids in the first and

second cavities

110 and 120 can be ion exchanged.

The first electrode set 301 is located in the first cavity 110 and exposed in the first cavity 110, so as to detect electrochemical parameters of the liquid in the first cavity 110, such as PH, hematocrit, ion concentration (K +, na +, cl-, ca2 +), glucose, lactic acid, O2, CO2 partial pressure, and the like. For example, the first cavity 110 is configured to receive a blood sample, and the first electrode set 301 is configured to detect the electrochemical parameter of the blood sample. Preferably, the first electrode group 301 may be disposed on the cover 20 and exposed to the first cavity 110. Of course, in other embodiments, the first electrode set 301 may also be disposed on the base 10 and exposed to the first cavity 110.

It will be appreciated that the sample testing device may be used in conjunction with a blood gas analysis apparatus to measure parameters such as pH, hematocrit, ion concentration (K +, na +, cl-, ca2 +), glucose, lactate, and O2, CO2 partial pressure in a blood sample. The sample testing device can generally perform the parameter measurement by using an electrochemical method or an alternating current impedance method. The blood gas analysis equipment measures the concentration of H + in a blood sample, gases (mainly CO2, O2, etc.) dissolved in blood, other parameters, etc. by using a blood gas analysis technology to know the respiratory function and the acid-base equilibrium state of a human body, and the adopted sample is usually a blood sample.

The second electrode set 302 is located in the second cavity 120 and exposed in the second cavity 120 for potential detection of the liquid in the first cavity 110. As mentioned above, the liquids in first and

second volumes

110, 120 may be ion exchanged to ensure a substantially uniform electrical environment in first and

second volumes

110, 120.

In one embodiment, the base 10 may be made of a hard material such as plastic, resin, polymer material, etc. For example, the base 10 may be made of ABS (Acrylonitrile Butadiene Styrene), PDMS (Polydimethylsiloxane), PC (Polycarbonate), PMMA (Polymethyl methacrylate), PS (General purpose polystyrene), PP (Polypropylene), COC (copolymers of cyclo olefin copolymer), etc., and may be formed by injection molding, numerical control machining, or 3D printing. The material of the cover 20 may be the same as or different from that of the base 10. Preferably, the cover 20 may be a circuit board, that is, the cover 20 is provided with a first electrode group 301 and a second electrode group 302, and the first electrode group 301 and the second electrode group 302 are provided on the same side of the cover 20. The base 10 and the cover 20 can be connected and fixed by means of screw connection, insertion connection, fastening, bonding, welding, and the like, and cooperate with the clamping box dam 30.

In an embodiment, the cover 20 is provided with a first inlet 201 and a first outlet 202 which are communicated with the first cavity 110, the liquid outside the sample testing device 100 can flow to the first cavity 110 through the first inlet 201, and the liquid inside the first cavity 110 can flow out of the sample testing device 100 through the first outlet 202.

Wherein an end of the first inlet 201 adjacent to the first receiving chamber 110 is at least partially exposed to the first receiving chamber 110 to enable communication between the first inlet 201 and the first receiving chamber 110. An end of the first outlet 202 adjacent to the first receiving chamber 110 is at least partially exposed within the first receiving chamber 110 to enable communication between the first outlet 202 and the first receiving chamber 110.

The shape of the first inlet 201 may be circular, rectangular, polygonal, etc., and the shape of the first outlet 202 may be circular, rectangular, polygonal, etc., which are not described in detail. It is understood that the shape of the first inlet 201 and the first outlet 202 may be the same or different.

Preferably, the axes of the first inlet 201 and the first outlet 202 are substantially parallel and spaced apart. It is to be understood that the use of the term "substantially" in this application in terms of a numerical quantity or other quantifiable relationship (e.g., perpendicularity or parallelism) is to be understood as indicating a quantity of ± 10%. Thus, for example, lines that are substantially parallel to each other may be at an angle of between 0 ° and 10 ° to each other.

Referring to fig. 2 and 3, fig. 2 is a schematic structural view of a dam 30 according to some embodiments of the present disclosure, and fig. 3 is a schematic structural view of the dam 30 and a cover 20 according to some embodiments of the present disclosure when they are engaged. Opposite sides of the dam 30 interfere with the base 10 and the cover 20 to form a first receiving chamber 110 and a second receiving chamber 120, respectively. The dam 30 generally includes a first dam 31 surrounding the first electrode group 301, and a second dam 32 surrounding the second electrode group 302. The first dam 31 is configured to form the first receiving cavity 110, and the second dam 32 is configured to form the second receiving cavity 120, that is, two opposite sides of the first dam 31 respectively interfere with the base 10 and the cover 20 to form the first receiving cavity 110, and two opposite sides of the second dam 32 respectively interfere with the base 10 and the cover 20 to form the second receiving cavity 120.

Specifically, the first dam 31 is substantially annular and is disposed around the first electrode group 301 such that the first electrode group 301 is exposed in the first cavity 110. The second dam 32 is substantially annular and is disposed around the periphery of the second electrode set 302 such that the second electrode set 302 is exposed to the second cavity 120. The dam 30 may be made of rubber, silica gel, or other elastic material. For example, the dam 30 is made of silicon, and the first dam 31 and the second dam 32 may be formed by an integral molding process (e.g., injection molding). Of course, in other embodiments, the first and

second weirs

31 and 32 may be formed separately and assembled into the weirs 30, which will not be described in detail. The first dam 31 and the second dam 32 are disposed between the base 10 and the cover 20, and the base 10 and the cover 20 cooperate to clamp the first dam 31 and the second dam 32. The first box dam 31 and the second box dam 32 can be fixedly connected to the base 10 and/or the cover 20 by screwing, inserting, snapping, welding, bonding, and the like.

Preferably, the dam 30 made of a material having a certain elasticity, such as rubber, silicon gel, etc., may facilitate the base 10 and the cover 20 to seal the first receiving cavity 110 and the second receiving cavity 120 respectively in an interference fit manner when the dam 30 is clamped.

Wherein the first inlet 201 and the first outlet 202 are at least partially exposed to the first volume 110. Preferably, an orthographic projection of the first inlet 201 on the first dam 31 is adjacent to an outer periphery of the first cavity 110 and is located in the first cavity 110. The orthographic projection of the first outlet 202 on the first dam 31 is adjacent to the outer periphery of the first cavity 110 and is located in the first cavity 110. It will be appreciated that the first inlet 201 and the first outlet 202 are adjacent to opposite ends of the first chamber 110 in the liquid flow direction in the first chamber 110, respectively, so that the liquid flow distance in the first chamber 110 is approximately equal to or slightly greater than the distance between the first inlet 201 and the first outlet 202, and the length of the first chamber 110 in the liquid flow direction is approximately equal to or slightly greater than the distance between the first inlet 201 and the first outlet 202.

In an embodiment, the base 10 and/or the cover 20 are provided with a third electrode set 303, and the third electrode set 303 is located outside the first cavity 110 and the second cavity 120; the first electrode set 301 and the second electrode set 302 are electrically connected to a third electrode set 303, respectively, and the third electrode set 303 is configured to establish a signal connection with an external detection device (e.g., a blood gas analysis device). Preferably, the third electrode group 303 is provided on the lid 20, and is provided on the same side or a different side of the lid 20 from the first electrode group 301. As shown in fig. 3, the third electrode group 303, the first electrode group 301, and the second electrode group 302 are provided on the same side of the lid 20.

In an embodiment, the electrodes in the first electrode set 301 are sequentially arranged and distributed on the cover 20 along the flowing direction of the liquid in the first cavity 110. For example, the first electrode set 301 may include a plurality of test electrodes, and the plurality of test electrodes may be movably disposed on the cover 20 along a single row and a plurality of rows. Taking the plurality of test electrodes distributed in a single row as an example, the first inlet 201 may penetrate through a first test electrode of the plurality of test electrodes arranged in sequence, and the first outlet 202 may penetrate through a last test electrode of the plurality of test electrodes arranged in sequence. At this time, the length of the cavity of the first cavity 110 along the fluid flowing direction inside the first cavity may be minimized, so that the liquid inside the first cavity 110 may be minimized during measurement, and thus, the minimum sample amount measurement is realized.

In an embodiment, the sample testing device 100 may further include a conductive member 40 penetrating the first and

second dams

31 and 32, and both ends of the conductive member 40 are exposed to the first and

second cavities

110 and 120, respectively. The second electrode group 302 is exposed in the second cavity 120 to serve as a reference electrode for potential detection so as to ensure potential stability.

The conductive member 40 may be a salt bridge, one end of which is exposed to the second cavity 120 and the other end of which is exposed to the first cavity 110. It can be understood that the first receiving chamber 110 is configured to receive a sample liquid to be tested (e.g., a blood sample, etc.), and the second receiving chamber 120 is configured to receive a liquid such as a reference liquid, without an additional container for receiving a liquid such as a reference liquid. Wherein, two ends of the salt bridge are respectively exposed in the first and

second cavities

110 and 120 to reduce the hydraulic connection potential. It will be appreciated that when a salt bridge is inserted at the interface between the electrolyte solutions in first and

second volumes

110 and 120, two interfaces are created, and K + and CI-out diffusion in the salt bridge becomes the dominant ion diffusion at these interfaces. Because the diffusion rates of K + and CI-are similar, the liquid-contact potential generated by the contact of the salt bridge and two solutions is very small, and the directions of the K + and the CI-are opposite, so that the K + and the CI-are mutually counteracted and then reduced to 1-2 mV. The salt bridges do not chemically react with the liquid in first volume 110. I.e., the salt bridge allows free diffusion of ions, while biomacromolecules cannot pass freely through the salt bridge. When the salt bridge is disposed between the first and

second cavities

110 and 120, macromolecules in the first cavity 110 may be prevented from entering the second cavity 120, and macromolecules in the second cavity 120 may be prevented from entering the first cavity 110, and the liquids in the first and

second cavities

110 and 120 may be ion exchanged via the salt bridge, thereby achieving a substantially uniform electrical environment.

In the sample testing device 100 provided in the embodiment of the present application, the salt bridge is arranged to penetrate through the first containing cavity 110 and the second containing cavity 120, and the salt bridge can realize ion exchange in the first containing cavity 110 and the second containing cavity 120, so as to reduce or stabilize the liquid junction potential, thereby ensuring that the potential of the liquid in the first containing cavity 110 and the second containing cavity 120 is stable on the premise that the liquid in the first containing cavity 110 and the second containing cavity 120 is not mixed with the liquid.

Referring to fig. 4, fig. 4 is a schematic structural view of a sample testing device 100 according to another embodiment of the present application, in which a third cavity 130 is disposed on the base 10 and/or the cover 20. In the example that the third cavity 130 is disposed on the base 10, the third cavity 130 is separated from the first cavity 110 to be not communicated with each other, and the third cavity 130 is communicated with the second cavity 120 through the second inlet 101. The third cavity 130 may be formed on the first surface 10a of the base 10 and configured to receive a reference liquid or a container containing the reference liquid. The third volume 130 and the second volume 120 are in communication through the second inlet 101 so that the liquid in the third volume 130 can flow into the second volume 120 through the second inlet 101.

It is understood that in the embodiment of the present application, all directional indications (such as upper, lower, left, right, front, and rear … …) are used only for explaining the relative positional relationship between the components, the motion situation, and the like in a certain posture (as shown in the drawing), and if the certain posture is changed, the directional indication is changed accordingly.

Referring to fig. 5 to 7, fig. 5 isbase:Sub>A schematic structural diagram ofbase:Sub>A sample testing device 100 according to another embodiment of the present application, fig. 6 isbase:Sub>A schematic structural diagram of the sample testing device 100 according to the embodiment of fig. 5, which isbase:Sub>A schematic structural diagram ofbase:Sub>A cross section of the sample testing device 100 alongbase:Sub>A directionbase:Sub>A-base:Sub>A in the embodiment of fig. 5. The bottom wall of the containing groove 102 is provided with a test port 1020, and the test port 1020 and the box dam 30 are arranged at intervals. The third electrode set 303 is disposed corresponding to the test port 1020, and can be exposed from the test port 1020 to the outside of the sample testing device 100, so that the third electrode set 303 can be docked with an external device to complete the corresponding testing operation and signal transmission.

In this embodiment, the sample testing device 100 may further include a connection component 50 disposed on the base 10 and/or the cover 20, wherein the connection component 50 is disposed in communication with the first inlet 201 and the first outlet 202, respectively, for guiding external liquid to flow from the connection component 50 into the sample testing device 100, and for guiding liquid in the sample testing device 100 to flow out through the connection component 50. The following description will exemplarily describe the lead assembly 50 disposed on the cover 20.

The guiding assembly 50 generally includes a first guiding assembly 51 and a second guiding assembly 52 disposed on the cover body 20, that is, the first guiding assembly 51 and the second guiding assembly 52 are disposed on a side of the cover body 20 facing away from the dam 30. The first lead connecting assembly 51 is provided with a first lead connecting hole 510 penetrating through the first lead connecting assembly 51, and the second lead connecting assembly 52 is provided with a second lead connecting hole 520 penetrating through the second lead connecting assembly 52. The first receiving hole 510 is in communication with the first inlet port 201 such that liquid external to the sample testing device may flow from the first receiving hole 510 into the first inlet port 201. The second access hole 520 is in communication with the first outlet 202 such that fluid within the sample testing device may flow from the first outlet 202 into the second access hole 520 and out of the sample testing device via the second access hole 520.

In one embodiment, the first receiving hole 510 generally includes a first liquid inlet section 5101 and a first receiving section 5102 which are communicated, the first liquid inlet section 5101 is connected with the first inlet 201, and the first receiving section 5102 is arranged at the end of the first liquid inlet section 5101 which faces away from the first inlet 201. The cross-sectional aperture of the first liquid inlet section 5101 along the direction B-B is substantially uniform, and the cross-sectional aperture of the first connecting section 5102 along the direction B-B is gradually increased along the direction away from the first inlet 201, that is, the first connecting section 5102 is substantially horn-shaped. It will be appreciated that the flared first access segment 5102 facilitates the docking of the first access hole 510 with an external fluid conduit.

In one embodiment, the second leading hole 520 substantially includes a second liquid outlet section 5201 and a second leading section 5202 which are communicated, the second liquid outlet section 5201 is communicated with the first outlet 202, and the second leading section 5202 is disposed at an end of the second liquid outlet section 5201 facing away from the first outlet 202. The cross-sectional aperture of the second liquid outlet section 5201 along the direction B-B is substantially uniform, and the cross-sectional aperture of the second leading section 5202 along the direction B-B is gradually increased along the direction departing from the first outlet 202, that is, the second leading section 5202 is substantially trumpet-shaped. It will be appreciated that the flared second lead section 5202 facilitates docking of the second lead aperture 520 with an external liquid conduit.

Referring to fig. 8, fig. 8 is a schematic exploded view of the first connecting element 51 according to some embodiments of the present disclosure, and the first connecting element 51 may generally include a first connecting element 511 and a first positioning element 512 connected to the first connecting element 511. The first positioning element 512 is connected to the cover 20, the first guiding element 511 is disposed between the first positioning element 512 and the cover 20, and the first guiding hole 510 penetrates through the first guiding element 511 and the first positioning element 512.

The first connecting member 511 is a substantially cylindrical or rectangular member. The first guiding element 511 is disposed on a side of the cover body 20 away from the box dam 30 and abuts against the cover body 20. The first introduction hole 510 penetrates the first introduction piece 511 in the axial direction of the first inlet 201.

The first positioning element 512 is disposed on a side of the cover 20 away from the dam 30 and abuts against the cover 20. The first positioning member 512 is configured to position and mount the first lead member 511 such that the first lead hole 510 communicates with the first inlet 201. The first positioning element 512 can be connected and fixed to the cover 20 and the base 10 by screwing, inserting, fastening, welding, bonding, and the like, and the first positioning element 512 is matched with the cover 20 to clamp and fix the first guiding element 511.

In one embodiment, the first positioning member 512 generally includes a first positioning portion 5121 and a first connecting portion 5122 that are integrally formed. The first connecting portion 5122 is sleeved on the first guiding member 511, and the first positioning portion 5121 is disposed on the periphery of the first connecting portion 5122 and connected to the cover 20. The first positioning portion 5121 can be a plate-shaped ring structure, but can also be other shapes, which is not described herein. The first positioning portion 5121 can be fixedly connected to the cover 20 and/or the base 10 by screwing, inserting, snapping, welding, adhering, or the like.

Wherein, the surface of the first positioning portion 5121 close to the cover body 20 is almost in seamless contact with the cover body 20. The first connecting portion 5122 is disposed on a side of the first positioning portion 5121 away from the cover 20, and is sleeved on the first guiding member 511 to position and assemble the first guiding member 511.

In an embodiment, the first positioning element 512 has a first coupling hole 5123 penetrating through the first positioning element 512, that is, the first coupling hole 5123 penetrates through the first connecting portion 5122. The first guiding element 511 is embedded in the first coupling hole 5123, and the shape of the first guiding element 511 substantially matches the shape of the first coupling hole 5123. Wherein, the first guiding piece 511 can be in interference fit with the first socket 5123 to improve the sealing and fastening effect of the contact surface of the two.

In an embodiment, the first guiding element 511 is a cylindrical body, and the first guiding element 511 is provided with a first annular slot 5111 around its circumference, that is, the circumferential surface of the first guiding element 511 is recessed towards the axial direction of the first guiding element 511 to form the first annular slot 5111. Wherein, the first ring slot 5111 is provided with at least one, for example two. The inner side wall of the first coupling hole 5123 is provided with a first annular protrusion (as shown in fig. 3) corresponding to the first annular groove 5111, and the first annular groove 5111 is matched with the first annular protrusion to fix the first guiding member 511. The first annular projection is provided with at least one.

It is understood that the first coupling member 511 may be made of a material having a certain elasticity, such as rubber, silicon, etc. In an initial state that the first guiding element 511 is not pressed, an initial volume of the first guiding element 511 is slightly larger than a volume of the first engaging hole 5123, so that when the first positioning element 512 cooperates with the cover body 20 to clamp the first guiding element 511, the first guiding element 511 can generate a certain elastic deformation to further improve the stability and the tightness of the whole structure.

In an embodiment, at least one second positioning column 5124, for example, 2 second positioning columns 5124 shown in the figure, is protruded from a surface of the first positioning portion 5121 close to the cover 20. At least one second positioning hole 205 corresponding to the second positioning column 5124 is formed on the cover 20, for example, 2 second positioning holes 205 in the figure. The second positioning column 5124 and the second positioning hole 205 cooperate to position the first guiding component 51 when the first guiding component 51 is assembled on the cover 20.

It is understood that, in other embodiments, the second positioning holes 5124 may be disposed on the cover 20, and the second positioning holes 205 may be disposed on the first positioning portions 5121, that is, one of the cover 20 and the first positioning portions 5121 is provided with the second positioning holes 5124, and the other is provided with the second positioning holes 205.

In an embodiment, the first positioning portion 5121 further has a first mounting hole 5125, and the cover 20 has a first mounting hole 206 corresponding to the first mounting hole 5125. The first mounting hole 5125 and the first assembling hole 206 are disposed opposite to each other, so that a bolt or a screw can sequentially penetrate through the first mounting hole 5125 and the first assembling hole 206, and the first lead assembly 51 and the cover body 20 are connected and fixed.

In one embodiment, the bottom wall of the receiving cavity 102 defines a first mounting groove 1012. The first mounting hole 5125, the first assembling hole 206 and the first assembling groove 1012 are coaxially disposed, so that a bolt or a screw penetrating through the first mounting hole 5125 and the first assembling hole 206 can be embedded in the first assembling groove 1012, and the cover 20 and the base 10 can be fixedly connected. That is, in the present embodiment, the coaxial first mounting hole 5125, the first assembling hole 206 and the first assembling groove 1012 are provided, so that after the positioning of the cover 20 and the first lead assembly 51 is completed, the connection and fixation between the cover 20 and the base 10 and the connection and fixation between the first lead assembly 51 and the cover 20 can be directly completed at one time.

In an embodiment, the first positioning portion 5121 further has a first connection hole 5126, and the first connection hole 5126 can be configured to position the external fluid pipe when the first lead element 51 is connected to the external fluid pipe. In some embodiments, the cover 20 is provided with a first alignment hole 207 corresponding to the first alignment hole 5126. Wherein the first docking hole 5126 and the first docking hole 207 are coaxially disposed to further facilitate the docking of the external fluid conduit with the first docking assembly 51.

Referring to fig. 9, fig. 9 is a schematic exploded view of the second connecting element 52 according to some embodiments of the present disclosure, and the second connecting element 52 generally includes a second connecting element 521 and a second positioning element 522. The second positioning member 522 is connected to the cover 20, the second guiding member 521 is disposed between the second positioning member 522 and the cover 20, and the second guiding hole 520 penetrates through the second guiding member 521 and the second positioning member 522.

The second connecting element 521 is substantially a cylindrical or rectangular member. The second guiding element 521 is disposed on a side of the cover 20 away from the box dam 30 and abuts against the cover 20. The second introduction hole 520 penetrates the second introduction piece 521 in the axial direction of the first outlet 202.

The second positioning member 522 is disposed on a side of the cover 20 away from the dam 30 and abuts against the cover 20. The second positioning member 522 is configured to position and mount the second lead 521 such that the second lead hole 520 communicates with the first outlet 202. The second positioning element 522 can be connected and fixed to the cover 20 and the base 10 by means of screw connection, insertion, fastening, welding, bonding, and the like, and the second positioning element 522 is matched with the cover 20 to clamp and fix the second guiding element 521.

In one embodiment, the second positioning member 522 generally includes a second positioning portion 5221 and a second connecting portion 5222 which are integrally formed. The second connecting portion 5222 is sleeved on the second guiding member 521, and the second positioning portion 5221 is disposed on the periphery of the second connecting portion 5222 and connected to the cover 20. The second positioning portion 5221 can be a ring-shaped plate structure, but can also be other shapes, which are not described in detail. The second positioning portion 5221 can be fixed to the cover 20 and/or the base 10 by screwing, inserting, snapping, welding, adhering, or the like.

Wherein the surface of the second positioning portion 5221 adjacent to the cover 20 is in nearly seamless contact with the cover 20. The second connecting portion 5222 is disposed on a side of the second positioning portion 5221 away from the cover 20, and is sleeved on the second guiding element 521, so as to position and assemble the second guiding element 521.

In one embodiment, the second positioning member 522 has a second coupling hole 5223 penetrating through the second positioning member 522, that is, the second coupling hole 5223 penetrates through the second connecting portion 5222. The second guiding member 521 is inserted into the second coupling hole 5223, and the shape of the second guiding member 521 substantially matches the shape of the second coupling hole 5223. The second guiding element 521 can be in interference fit with the second socket hole 5223 to improve the sealing and fastening effects of the contact surfaces of the two.

In one embodiment, the second guiding element 521 is a cylindrical body, and the second guiding element 521 is provided with a second annular groove 5211 around the periphery thereof, that is, the peripheral surface of the second guiding element 521 is recessed toward the axial direction of the second guiding element 521 to form the second annular groove 5211. At least one, for example, two, ring slots 5211 are provided. The inner side wall of the second socket hole 5223 is provided with a second annular protrusion (as shown in fig. 3) corresponding to the second annular groove 5211, and the second annular groove 5211 is matched with the second annular protrusion to fix the second lead 521. The second annular bulge is provided with at least one.

It is understood that the second lead 521 can be made of a material with certain elasticity, such as rubber, silicon rubber, etc. In an initial state where the second guiding element 521 is not pressed, an initial volume of the second guiding element 521 is slightly larger than a volume of the second sleeving hole 5223, so that when the second positioning element 522 and the cover 20 cooperate to clamp the second guiding element 521, the second guiding element 521 can be elastically deformed to further improve stability and tightness of the overall structure.

In an embodiment, at least one third positioning column 5224, for example, 2 third positioning columns 5224 shown in the drawing, is protruded from a surface of second positioning portion 5221 close to cover 20. At least one third positioning hole 208, such as 2 third positioning holes 208 shown in the figure, is formed in the cover 20 and corresponds to the third positioning column 5224. The third positioning holes 208 and the third positioning columns 5224 cooperate to position the second guiding component 52 when the second guiding component 52 is assembled on the cover 20.

It is understood that, in other embodiments, the third positioning holes 5224 can be disposed on the cover 20 and the third positioning holes 208 can be disposed on the second positioning portions 5221, that is, the third positioning holes 208 are disposed on one of the cover 20 and the second positioning portions 5221 and the third positioning holes 5224 are disposed on the other one of the cover 20 and the second positioning portions 5221.

In one embodiment, the second positioning portion 5221 further defines a second mounting hole 5225, and the cover 20 defines a second mounting hole 209 corresponding to the second mounting hole 5225. The second mounting hole 5225 and the second assembling hole 209 are disposed opposite to each other, so that a bolt or a screw may sequentially penetrate through the second mounting hole 5225 and the second assembling hole 209, and the second lead assembly 52 and the cover 20 are connected and fixed.

In one embodiment, the bottom wall of the receiving cavity 102 defines a second assembling cavity 1013. The second mounting hole 5225, the second mounting hole 209 and the second mounting groove 1013 are coaxially disposed, so that a bolt or a screw passing through the second mounting hole 5225 and the second mounting hole 209 can be embedded in the second mounting groove 1013, thereby realizing the connection and fixation of the cover 20 and the base 10. That is, in the present embodiment, the second mounting hole 5225, the second mounting hole 209 and the second mounting groove 1013 are coaxially arranged, so that after the positioning of the cover 20 and the second lead assembly 52 is completed, the connection and fixation of the cover 20 and the base 10 and the connection and fixation of the second lead assembly 52 and the cover 20 can be directly and once completed.

In one embodiment, the second positioning portion 5221 further defines a second alignment hole 5226, and the second alignment hole 5226 can be configured to position the external liquid pipe when the second guiding assembly 52 is aligned with the external liquid pipe. In some embodiments, the cover 20 is provided with a second alignment hole 210 corresponding to the second alignment hole 5226. Wherein the second docking aperture 5226 and the second alignment aperture 210 are coaxially disposed to further facilitate docking of an external fluid conduit with the second docking assembly 52.

It will be appreciated that in some embodiments, the first and

second lead assemblies

51, 52 are substantially identical in construction, differing in the location at which they are mounted. Namely, the first lead receiving hole 510 of the first lead receiving assembly 51 is communicated with the first inlet 201, and the second lead receiving hole 520 of the second lead receiving assembly 52. The first access hole 510 is in communication with the first outlet 202 such that fluid external to the sample testing device can flow from the first access hole 510 into the first inlet 201, and such that fluid internal to the sample testing device can flow from the first outlet 202 into the second access hole 520 and out of the sample testing device via the second access hole 520.

The application provides a sample testing device connects through setting up first to draw subassembly and second and draws the subassembly for sample testing device outside liquid can connect from first and draw the subassembly inflow, and connects via the second and draw the subassembly outflow, can not store inside sample testing device, need not to set up the waste liquid container at sample testing device inside, can greatly reduce sample testing device's volume, does benefit to the frivolousization that realizes sample testing device. In addition, connect through setting up first leading subassembly and second and lead the subassembly to outside liquid pipeline and sample testing arrangement's butt joint makes it comparatively convenient to change sample testing arrangement.

It is noted that the terms "comprises" and "comprising," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

The above description is only a part of the embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent devices or equivalent processes performed by the content of the present application and the attached drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A sample testing device, comprising:

a base;

the cover body is arranged on one side of the base;

a first cavity and a second cavity which are not communicated with each other are formed between the base and the cover body, a first inlet and a first outlet which are communicated with the first cavity are arranged on the base and/or the cover body, a second inlet which is communicated with the second cavity is arranged on the base and/or the cover body, and a first electrode group exposed to the first cavity is arranged on the base and/or the cover body; and a second electrode group exposed to the second cavity is arranged on the base and/or the cover body.

2. The sample testing device of claim 1, wherein a third electrode set is disposed on the base and/or cover, the third electrode set being disposed outside the first and second cavities; the first electrode group and the second electrode group are respectively electrically connected with the third electrode group.

3. The sample testing device of claim 1, further comprising a dam disposed between the base and the cover, wherein the dam, the base, and the cover cooperate to define the first cavity and the second cavity.

4. The sample testing device of claim 3, wherein a third cavity is provided in the base and/or the cover, the third cavity being not in communication with the first cavity, the third cavity being in communication with the second cavity via the second inlet.

5. The sample testing device of claim 3, wherein said dam comprises a first dam configured to form said first cavity and a second dam configured to form said second cavity;

the first dam is arranged around the periphery of the first electrode group, and the second dam is arranged around the periphery of the second electrode group.

6. The sample testing device of claim 5, further comprising an electrically conductive member extending through said first and second dams, opposite ends of said electrically conductive member being exposed to said first and second cavities, respectively.

7. The sample testing device of claim 1, further comprising a lead assembly disposed on the base and/or cover, wherein the lead assembly defines a first lead aperture in communication with the first inlet and a second lead aperture in communication with the first outlet.

8. The sample testing device of claim 7, wherein said docking assembly comprises a first docking member provided with said first docking aperture, and a second docking member provided with said second docking aperture; the first lead connecting piece and the second lead connecting piece are arranged at intervals.

9. The sample testing device of claim 8, wherein the lead assembly further comprises a first positioning member coupled to the first lead member, and a second positioning member coupled to the second lead member; the first positioning piece is sleeved on the first leading piece and connected with the base and/or the cover body, and the second positioning piece is sleeved on the second leading piece and connected with the base and/or the cover body.

10. The sample testing device of claim 9, wherein the first positioning member comprises a first positioning portion and a first connecting portion, the first connecting portion is sleeved on the first guiding member, and the first positioning portion is disposed at the periphery of the first connecting portion and connected to the base and/or the cover; the second positioning part comprises a second positioning part and a second connecting part, the second connecting part is sleeved on the second guide part, and the second positioning part is arranged on the periphery of the second connecting part and connected with the base and/or the cover body.