Electrochemical biosensing electrode test protection device
By designing a magnetic stirring base and an internal mesh frame structure, the problems of diffusion and bubble formation in the test liquid in electrochemical biosensors are solved, achieving uniform liquid stirring and electrode protection, and improving the reliability of the test.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-23
- Publication Date
- 2026-03-24
AI Technical Summary
In existing electrochemical biosensors, the test liquid tends to diffuse and form uneven distribution during testing, and bubbles on the electrode surface are difficult to remove, affecting the test results.
It adopts a magnetic stirring base, an outer fixed cylinder and an inner mesh frame structure. The outer fixed cylinder surrounds the electrode functional area and the inner mesh frame supports the magnetic rotor. The test liquid is stirred by the rotation of the magnetic rotor to prevent liquid diffusion and to stir evenly.
It effectively prevents the test liquid from overflowing, improves liquid uniformity, reduces air bubbles on the electrode surface, and ensures the accuracy of test results.
Smart Images
Figure CN224035313U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a set of electrochemical biosensor electrode test protection device belongs to experimental apparatus field. BACKGROUND
[0002] Most of the present wearable electrochemical biosensors need to use flexible electrodes. In the research and development stage, the structure of the electrochemical biosensor is as shown in the drawing, including the substrate, the electrode functional area 11 for adding test liquid is arranged at one end of the substrate, the electrode functional area 11 is connected with electrode lead, the electrode lead extends to the end of the substrate away from the electrode functional area 11, the insulating protective layer 12 partially covering the electrode lead is arranged on the substrate, so that the electrode lead is only exposed at the end of the substrate away from the electrode functional area 11 as a wiring pin 13, and the surface between the electrode functional area 11 and the wiring pin 13 is insulated. Figure 1
[0003] There are two major problems in testing such electrochemical biosensors. First, if the actual working condition is directly added to the electrode functional area in microliter level test liquid, the droplet formed by the test liquid may break through the liquid surface tension and diffuse to the outside of the functional area during the test process. Second, the test liquid cannot be stirred during the test process, resulting in uneven concentration of substances in the test liquid, and the bubbles formed on the electrode surface cannot be removed, reducing the electrode reaction area. The above two major problems will affect the test results. UTILITY MODEL CONTENT
[0004] In order to overcome the deficiencies of the prior art, the utility model provides a set of electrochemical biosensor electrode test protection device, which can stir the test liquid and avoid the test liquid overflow.
[0005] The utility model solves the technical problems by adopting the following technical scheme:
[0006] A set of electrochemical biosensor electrode test protection device is used for electrochemical biosensor, including the magnetic stirring base with the plane top surface, the hollow outer fixed cylinder, the inner net frame arranged in the outer fixed cylinder and the magnetic rotor with the rotation range less than the area of the inner net frame, the magnetic rotor is placed on the inner net frame, the inner contour of the outer fixed cylinder is congruent or similar to the shape of the electrode functional area of the electrochemical biosensor to block the test liquid.
[0007] The electrochemical biosensor electrode test protection device provided by the application can avoid the diffusion of the test liquid while adding stirring, improve the uniformity of the test liquid and reduce the residual bubbles on the electrode surface.
[0008] As an optional implementation form, the inner net frame is in interference fit with the outer fixed cylinder.
[0009] As an optional implementation form, the inner wall of the outer fixing cylinder is provided with an internal thread, and the outer edge of the inner net rack is provided with an external thread matched with the internal thread.
[0010] As an optional implementation form, the width of the magnetic stirring base is greater than the width of the electrochemical biosensor.
[0011] As an optional implementation form, the bottom of the outer fixing cylinder is provided with a waterproof rubber ring.
[0012] As an optional implementation form, the diameter of the mesh of the inner net rack is less than one tenth of the length of the magnetic rotor.
[0013] As an optional implementation form, the bottom of the magnetic stirring base is provided with four screw feet.
[0014] As an optional implementation form, the side surface of the magnetic stirring base is provided with a rotating speed adjusting knob.
[0015] As an optional implementation form, the inner contour and the outer contour of the outer fixing cylinder are both circular.
[0016] The beneficial effect of the utility model is: the electrochemical biosensor electrode test protection device of the utility model utilizes the outer fixing cylinder to enclose the electrode functional area, can prevent the overflow of the to-be-tested liquid, can add more to-be-tested liquid in the test, the inner net rack supports the magnetic rotor, and the rotation of the magnetic rotor can stir the to-be-tested liquid and will not wear the electrode functional area.
[0017] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the structure particularly pointed out in the written description and drawings. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a structural schematic view of an existing electrochemical biosensor.
[0019] Figure 2 is a structural schematic view of the magnetic stirring base provided by the embodiment of the present application.
[0020] Figure 3 is a structural schematic view of the outer fixing cylinder, the inner net rack and the magnetic rotor.
[0021] Figure 4 is a working state schematic view of the electrochemical biosensor electrode test protection device provided by the embodiment of the present application when hiding the magnetic rotor.
[0022] 11, electrode functional area; 12, insulation protective layer; 13, wiring pin; 21, magnetic stirring base; 22, rotating speed adjusting knob; 31, outer fixing cylinder; 32, inner net rack; 33, magnetic rotor. DETAILED DESCRIPTION
[0023] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explanation, and are not to be understood as a limitation of the present application.
[0024] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "vertical", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0025] In the description of the present application, it should be noted that, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0026] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature therebetween. Moreover, the first feature "on", "above" and "on top of" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "underneath" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.
[0027] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.
[0028] Referring to Figures 2 to 4 The application embodiment provides a set of electrochemical biosensor electrode test protection device for electrochemical biosensor, such as Figure 1 , including a substrate and an electrode functional area 11, an insulating protective layer 12 and a wiring pin 13 arranged on the substrate.
[0029] The set of electrochemical biosensor electrode test protection device includes a magnetic stirring base 21 with a flat top surface, a hollow outer fixed cylinder 31, an inner net rack 32 arranged in the outer fixed cylinder 31, and a magnetic rotor 33 with a rotation range smaller than the area of the inner net rack 32. The inner contour of the outer fixed cylinder 31 is matched with the shape of the electrode functional area 11 of the electrochemical biosensor.
[0030] The shape of the electrode functional area 11 can be irregular, and the common shape of the electrode functional area 11 is circular or elliptical. The inner contour of the outer fixing cylinder 31 cooperates with the shape of the electrode functional area 11, which means that the inner contour of the outer fixing cylinder 31 is congruent with the shape of the electrode functional area 11; or the inner contour of the outer fixing cylinder 31 is similar to the shape of the electrode functional area 11, and the inner contour of the outer fixing cylinder 31 is slightly larger than the electrode functional area 11. When the electrode functional area 11 is circular, the inner contour of the outer fixing cylinder 31 is circular; when the electrode functional area 11 is rectangular, the inner contour of the outer fixing cylinder 31 is rectangular. This shape cooperation ensures that the outer fixing cylinder 31 surrounds the electrode functional area 11, avoiding the overflow of the test liquid in the electrode functional area 11. Most of the electrode functional areas 11 of the electrochemical biosensor are circular, and preferably, the inner and outer contours of the outer fixing cylinder 31 are circular.
[0031] The specific test steps are as shown in Figure 4 Figure 4 In order to clearly show the inner net frame, the magnetic rotor is hidden, and the magnetic rotor needs to be put in during actual testing), first place the electrochemical biosensor on the top surface of the magnetic stirring base 21, place the outer fixing cylinder 31 on the electrochemical biosensor, so that the inner edge of the outer fixing cylinder 31 surrounds the electrode functional area 11, then add the test liquid into the hollow of the outer fixing cylinder 31, then put the inner net frame 32 into the hollow of the outer fixing cylinder 31, and place the magnetic rotor 33 on the inner net frame 32, start the magnetic stirring base 21, and make the magnetic rotor 33 rotate, so as to stir the test liquid and eliminate the bubbles generated on the electrode surface. Since the inner net frame supports the magnetic rotor 33, the rotation of the magnetic rotor 33 will not wear the electrode functional area 11. It should be noted that during the test, the test liquid does not necessarily have to immerse the magnetic rotor 33, as long as part of the magnetic rotor 33 is immersed in the test liquid to achieve effective stirring.
[0032] The internal design of the magnetic stirring base 21 can be the same as the magnetic stirrer in the prior art, that is, an electric motor is arranged inside, and a pair of magnets are arranged at the output end of the electric motor. The electric motor drives the magnets to rotate, so that the magnetic stirring base 21 can drive the magnetic rotor 33 to rotate. Preferably, a rotating speed adjusting knob 22 is arranged on the side surface of the magnetic stirring base 21. The corresponding internal structure of the magnetic stirring base 21 can be an electric motor connected in series with an adjustable resistor, and the rotating speed adjusting knob 22 controls the length of the adjustable resistor connected. When the voltage is constant, the current is adjusted by adjusting the length of the adjustable resistor connected, so as to control the output power of the electric motor, which is reflected as the rotating speed.
[0033] The outer fixing cylinder 31 can be stabilized on the electrochemical biosensor only by gravity. Due to the surface tension and the small volume of the test liquid, the test liquid will not flow out from the gap between the outer fixing cylinder 31 and the electrochemical biosensor. Preferably, a waterproof rubber ring is arranged at the bottom of the outer fixing cylinder 31.
[0034] Specifically, the outer fixed cylinder 31 and the inner mesh frame 32 can be made of non-ferromagnetic and insulating materials, such as ceramics, polytetrafluoroethylene, polycarbonate, rubber, polymethyl methacrylate, glass, etc. Preferably made of transparent material, it is convenient to observe the stirring condition. The outer surface of the magnetic rotor 33 is coated with an insulating layer, such as a plastic coating.
[0035] In testing, as Figure 4 The wiring pin 13 protrudes from the magnetic stirring base 21, facilitating wiring operation (connecting with the converter used for testing).
[0036] In some embodiments, the inner mesh frame 32 is in interference fit with the outer fixed cylinder 31, and the friction between the outer fixed cylinder 31 and the inner mesh frame 32 can be used to adjust the stopping position of the inner mesh frame at will. In other embodiments, the inner wall of the outer fixed cylinder 31 is provided with an internal thread, and the outer edge of the inner mesh frame 32 is provided with an external thread matched with the internal thread, so that more stable hovering at any height can be achieved.
[0037] The shape of the magnetic rotor 33 can be like a common magnetic rotor, cylindrical or olive-shaped. The diameter of the mesh of the inner mesh frame 32 is less than one tenth of the length of the magnetic rotor 33, so that the magnetic rotor 33 does not have a large volume trapped in the mesh, ensuring smooth rotation of the magnetic rotor 33.
[0038] Preferably, the bottom of the magnetic stirring base 21 is provided with four screw feet, facilitating the adjustment of the top surface of the magnetic stirring base to be horizontal.
[0039] In the description of the present specification, the description of the terms "one embodiment", "certain embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, materials or characteristics described in connection with the described embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.
[0040] The above is the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which are also considered within the protection scope of the present application.
Claims
1. A set of electrochemical biosensor electrode test protection devices for use with an electrochemical biosensor, characterized in that, The magnetic stirring base (21) has a flat top surface, a hollow outer fixing cylinder (31), an inner net frame (32) arranged in the outer fixing cylinder (31), and a magnetic rotor (33) with a rotation range smaller than the area of the inner net frame (32), wherein the magnetic rotor (33) is placed on the inner net frame (32), and the inner contour of the outer fixing cylinder (31) is congruent or similar to the shape of the electrode functional area (11) of the electrochemical biosensor to block the to-be-measured liquid.
2. The electrochemical biosensor electrode test protection device of claim 1, wherein, The inner net frame (32) is in interference fit with the outer fixing cylinder (31).
3. The electrochemical biosensor electrode test protection device of claim 1, wherein, The inner wall of the outer fixing cylinder (31) is provided with an internal thread, and the outer edge of the inner net frame (32) is provided with an external thread matched with the internal thread.
4. The electrochemical biosensor electrode test protection device of claim 1, wherein, The width of the magnetic stirring base (21) is greater than the width of the electrochemical biosensor.
5. The electrochemical biosensor electrode test protection device of claim 1, wherein, The bottom of the outer fixing cylinder (31) is provided with a waterproof rubber ring.
6. The electrochemical biosensing electrode test protection device of claim 1, wherein, The diameter of the mesh of the inner net frame (32) is less than one tenth of the length of the magnetic rotor (33).
7. The electrochemical biosensing electrode test protection device of claim 1, wherein, The bottom of the magnetic stirring base (21) is provided with four screw feet.
8. The electrochemical biosensor electrode test protection device of claim 1, wherein, The side of the magnetic stirring base (21) is provided with a rotation speed adjusting knob (22).
9. The electrochemical biosensor electrode test protection device of claim 1, wherein, The inner contour and the outer contour of the outer fixing cylinder (31) are both circular.