JP4545515B2 - Liquid concentration detection unit, liquid concentration measuring device using the same, and liquid concentration measuring device - Google Patents

Description

  The present invention relates to a liquid concentration detection unit that electrochemically detects a specific component in a liquid. The present invention also relates to an in-liquid concentration measuring device using an in-liquid concentration detection unit that measures the concentration of a specific component in the liquid using this. Further, the present invention relates to an in-liquid concentration measuring device that electrochemically detects a specific component in the liquid and measures its concentration.

  The background art will be described with reference to FIGS. An in-liquid concentration measuring device 101 that detects a specific component in the liquid electrochemically and measures the concentration thereof is measured by immersing in a test liquid contained in a container 109 (see FIG. 6) or a toilet. As shown in the case of measuring by applying urine at 108 (see FIG. 7), the mode of measurement is such that the electrode group 102 for electrochemically detecting a specific component in the liquid is placed on the lower side. It is configured to be used with the portion 103 for displaying and holding up (see FIG. 8).

  In such an in-liquid concentration measuring apparatus 101, as shown in FIGS. 9 and 10, an electronic substrate 108 having an electrode group 102 (working electrode 102a, reference electrode 102b, reference electrode 102c) and larger than the electrode group 102 are provided. In the liquid arranged such that the wiring pattern 106a from the working electrode 102a that is adjacent to the opening 105 of the opened outer body 104 and reacts corresponding to the concentration of a specific component in the liquid is above the opening 105. The one having the concentration sensor part is a liquid or urine drop or bubble (dotted line part) in the upper part of the opening 105 after being pulled up from the immersed test liquid or after urine has been applied. May remain attached. Incidentally, as shown in FIG. 11, the electronic substrate 108 is provided with a glass substrate 107 on which the electrode group 102 is formed.

  Then, since the wiring pattern 106a from the working electrode 102a detects the specific component due to the adhered droplets and bubbles, there is a case where an accurate measurement value cannot be obtained as the concentration of the specific component in the liquid. For example, as shown in FIG. 12, when there is bubble adhesion compared to when there is no bubble adhesion, the display value (measurement) is lower than the permissible range than the glucose concentration (concentration of a specific component in the liquid). Value).

  As conventional measures for dealing with such a case, for example, a portion other than the portion to be made sensitive to the electrode is covered with an insulating protective film (see Patent Document 1), or the liquid concentration sensor portion is made of a hydrophilic resin. It was considered to prevent adhesion of drops and bubbles by coating.

JP 63-184052 A

  However, since the conventional coating measures require an insulating protective film, a hydrophilic resin coating material, and a coating treatment process thereof, there is a problem that the cost is increased in order to cope with the prevention of adhesion of droplets and bubbles. was there. In addition, the insulating protective film and the coating material of the hydrophilic resin have a problem that the material deteriorates due to long-term use and the intended covering effect cannot be obtained.

  Therefore, the present invention aims to solve the problems in the conventional measures by the coating, and the countermeasures for preventing the adhesion of drops and bubbles lead to an increase in cost and a decrease in durability due to long-term use. It is an object of the present invention to provide an in-liquid concentration detection unit capable of performing accurate measurement, an in-liquid concentration measuring apparatus using the same, and an in-liquid concentration measuring apparatus.

In order to achieve the above object, the liquid concentration detection unit of the present invention includes an electrode group including a working electrode that reacts corresponding to the concentration of a specific component in the liquid, and a substrate having a wiring pattern from the electrode group. And an outer body having an opening that is larger than the electrode group, and the substrate and the outer body are adjacent to each other while the electrode group is disposed within the opening of the opening. In the submerged concentration detecting unit used in a mode having a unit side connecting portion connected to the electrode group and having the electrode group on the lower side, at least from the top of the opening in the mode A wiring pattern from the working electrode is disposed in a range that exceeds 0.2 mm .

In order to achieve the above object, a liquid concentration measuring apparatus using the liquid concentration detection unit of the present invention includes an electrode group including a working electrode that reacts in response to the concentration of a specific component in the liquid, and A substrate having a wiring pattern from the electrode group and an outer body having an opening that is larger than the electrode group, and the electrode group is placed within the opening of the opening. An in-liquid concentration sensor unit disposed adjacent to the electrode group includes a unit-side connection portion connected to the electrode group, and the in-liquid concentration detection unit used in a mode in which the electrode group is located on the lower side, and the in-liquid concentration detection unit, Is a separate body, and the concentration of the specific component in the liquid based on the reaction corresponding to the concentration of the specific component in the liquid by the main body side connection portion and the working electrode for connecting to the unit side connection portion A main body including a measuring unit for measuring In the liquid concentration measuring device using a liquid concentration detection unit with the working electrode during the embodiment, at the range away beyond at least 0.2mm from the place where the uppermost part of the opening The wiring pattern is arranged in the following manner.

In order to achieve the above object, the liquid concentration measuring device of the present invention has an electrode group including a working electrode that reacts corresponding to the concentration of a specific component in the liquid, and a wiring pattern from the electrode group. And an outer body having an opening that is larger than the electrode group, and the substrate and the outer body are adjacent to each other while the electrode group is disposed within the opening of the opening. A mode comprising a sensor unit and a measuring unit that measures the concentration of the specific component in the liquid based on a reaction corresponding to the concentration of the specific component in the liquid by the working electrode, and the electrode group is on the lower side In the liquid concentration measurement device used in the above, in the above-described aspect, the wiring pattern from the working electrode is disposed in a range separated by at least 0.2 mm from the uppermost portion of the opening. It is characterized by.

  When the liquid concentration detection unit of the present invention, the liquid concentration measurement device using the same, and the liquid concentration measurement device are used in a mode in which the electrode group is on the lower side, drops and bubbles are formed above the opening. Since the adhesion remains, the wiring pattern from the working electrode arranged in a range away from the upper part of the opening does not detect this drop or bubble, and it is not special as in the case of the conventional coating method. It is not constituted through the processing of. Therefore, accurate measurement can be performed without leading to a decrease in durability due to cost increase or long-term use.

  In addition, the wiring pattern from the working electrode is placed in a range where no drops or bubbles remain, that is, in a range at least 0.2 mm away from the upper part of the opening. More accurate measurements.

  The present invention relates to a liquid concentration detection unit that electrochemically detects a specific component in a liquid, a liquid concentration measurement device using the liquid concentration detection unit that measures the concentration of a specific component in the liquid using the same, In addition, the present invention relates to a liquid concentration measuring apparatus for electrochemically detecting a specific component in the liquid and measuring the concentration thereof. Hereinafter, these three embodiments will be described.

  As a first embodiment, a liquid concentration detection unit includes an electrode group including a working electrode that reacts corresponding to the concentration of a specific component in a liquid, a substrate having a wiring pattern from the electrode group, and the electrode group. It is composed of an outer body having a larger opening, and the substrate and the outer body are disposed in the opening of the opening while the electrode group is disposed in the adjacent liquid concentration sensor unit, A unit-side connecting portion that is connected and used in a mode in which this electrode group is located on the lower side. In this mode, the working electrode is separated from the upper portion of the opening. This wiring pattern is arranged.

  As a second embodiment, a liquid concentration measurement device using a liquid concentration detection unit includes an electrode group including a working electrode that reacts in response to the concentration of a specific component in a liquid, and a wiring pattern from the electrode group. And an outer body having an opening that is larger than the electrode group. The substrate and the outer body are disposed in the adjacent liquid while the electrode group is disposed within the opening of the opening. The concentration sensor unit is provided with a unit side connecting portion connected to the electrode group, and the liquid concentration detection unit used in a mode in which the electrode group is located on the lower side, and the liquid concentration detection unit are separated from each other, A main body side connecting portion for connecting to the unit side connecting portion and a measuring portion for measuring the concentration of the specific component in the liquid based on the reaction corresponding to the concentration of the specific component in the liquid by the working electrode With a body During this aspect, at the range away from where the top of the opening constituting by disposing the wiring pattern from the working electrode.

  As a third embodiment, the liquid concentration measuring device corresponds to the concentration of a specific component in the liquid by the liquid concentration sensor unit described in the first embodiment and the working electrode provided in the liquid concentration sensor unit. And a measuring unit for measuring the concentration of a specific component in the liquid based on the reaction of the liquid, and used in a mode in which the electrode group provided in the liquid concentration sensor unit is on the lower side. In the embodiment, the wiring pattern from the working electrode is arranged in a range away from the upper portion of the opening provided in the liquid concentration sensor unit.

  According to the liquid concentration detection unit according to the present invention configured as in these three embodiments, the liquid concentration measurement apparatus using the same, and the liquid concentration measurement apparatus, the electrode group was used in the lower side. At this time, since the drops and bubbles remain attached to the upper part of the opening, the wiring pattern from the working electrode arranged in a range away from the upper part of the opening does not detect the drop or the bubble. Further, it is not configured through special processing as in the case of the prior art measures by coating. Therefore, accurate measurement can be performed without leading to a decrease in durability due to cost increase or long-term use.

  In these three embodiments, it is particularly effective to arrange the wiring pattern from the working electrode in a range that is at least 0.2 mm away from the upper portion of the opening. This is because droplets and bubbles remain attached in a range within 0.2 mm from the upper part of the opening.

  Hereinafter, the urine sugar meter that measures the urinary sugar content (glucose) concentration as the liquid concentration will be specifically described as an example of the above-described embodiment.

  First, the external view shown in FIG. 1, the enlarged view of the detection part shown in FIG. 2, the substrate diagram showing the electrode group and the wiring pattern inside the detection part shown in FIG. 3, and the cross-sectional enlarged view of the side surface of the detection part shown in FIG. The urine sugar concentration detection unit and the configuration of a urine sugar meter using the same will be described in detail.

  The urine sugar meter 1 using the urine sugar concentration detection unit includes a urine sugar concentration detection unit 2 for electrochemically detecting urine sugar, and a urine sugar concentration based on detection by the urine sugar concentration detection unit 2. The main body 21 which is a part that performs the measurement and display of the above and holds it at the time of measurement is roughly constituted.

  The urinary sugar concentration detection unit 2 includes the unit side connection part 3 in the urine sugar concentration sensor unit so that the electrode group 4 is located below the main body 21 when the main body 21 is held and used. To form.

  Then, the urinary sugar concentration sensor unit includes an electrode group 4 (working electrode 4a, working electrode 4a, which has a working electrode 4a (diameter 2.6 mm, laminated with an enzyme layer and other organic layers)) that reacts according to the urinary sugar concentration. A reference electrode 4b, a reference electrode 4c) and an electronic circuit board 7 provided with a glass substrate 6 on which a wiring pattern 5 of the electrode group 4 is formed, and an outer body 9 having an opening 8 which is larger than the electrode group 4. The electronic circuit board 7 (glass substrate 6) and the outer body 9 are adjacent to each other while the electrode group 4 is arranged in the opening 8 (diameter 3 mm, step 5 mm), corresponding to the urinary sugar concentration. The wiring pattern 5a from the working electrode 4a that reacts to the above is disposed in a range that is more than 0.2 mm away from the uppermost portion of the opening 8. Moreover, the unit side connection part 3 has a shape such that the outer body 9 and the end part of the electronic circuit board 7 can be connected to the main body 21 (main body side connection part 22) for measurement.

  The main body 21 includes a display 24 and an input unit 25 on the surface of the outer body 23, and a measurement unit and a power supply unit formed on the electronic circuit board inside the outer body 23. Here, the main body side connection portion 22 is configured by forming a shape in which the outer body 23 and the end portions of the electronic circuit board are connected to the unit side connection portion 3 and can be measured.

  The measurement unit includes a constant voltage application circuit, an amplifier circuit, an arithmetic circuit, and the like, and measures the urinary sugar concentration based on the output from the reaction corresponding to the urinary sugar concentration from the working electrode 4a. The input unit 25 is for starting power supply from the power supply unit. The power supply unit supplies power to each part of the electrical system of the apparatus. The display 24 displays information such as the result of the urine sugar concentration measured by the measurement unit. Since the reaction of the working electrode 4a is influenced by the temperature, the urinary sugar concentration sensor unit is provided with the temperature sensor 10, and the measuring unit corrects the amount affected by the temperature at the time of measurement.

  The urine sugar concentration detection unit and the urine sugar meter using the urine sugar concentration detection unit described above are not configured through special processing as in the conventional measures for preventing adhesion by coating, and are the uppermost part of the opening 8. A wiring pattern 5a from the working electrode 4a is disposed in a range away from the working electrode by more than 0.2 mm. On the other hand, as shown in FIG. 7, when the urine sugar meter 1 is held and the urine sugar concentration sensor part is measured by putting urine in the toilet 108, the bubbles are within 0.2 mm from the upper part of the opening 8. Adhesion remains only in the area. Therefore, the wiring pattern 5a from the working electrode 4a does not detect air bubbles, and accurate measurement can be performed without leading to an increase in cost or a decrease in durability due to long-term use.

  By the way, when 50 samples of urine sugar (glucose) concentration of 1000 mm / dl are measured, the wiring pattern 106 a from the working electrode 102 a described in the background art is located above the opening 105. In the arrangement, two out of the permissible range of the urinary sugar (glucose) concentration of 800 to 1200 mm / dl were out of the permissible range, but the wiring pattern 5a from the working electrode 4a described in the present embodiment was opened. Those placed in the range of more than 0.2 mm away from the uppermost part of the part 8 are all within the allowable range with respect to the allowable range of urinary sugar (glucose) concentration of 800 to 1200 mm / dl there were.

  In the above-described embodiment, the wiring pattern 5a from the working electrode 4a has a circular shape in the opening 8 and therefore has a range of more than 0.2 mm away from the top of the opening 8. However, when the opening 31 has a square shape as shown in FIG. 4, it is in a range that is more than 0.2 mm away from the side and corner that are the upper part of the opening 31, and As shown in FIG. 5, when the opening 41 has a polygonal shape, the wiring pattern from the working electrode should be arranged in a range that is more than 0.2 mm away from the uppermost corner of the opening 41. That's fine.

  In the above-described embodiment, the urinary sugar concentration detection unit 2 and the main body 21 form a body independently, and the urine sugar concentration detection unit 2 can be replaced. As shown, the urinary sugar concentration detection unit and the main body may be integrated. That is, the urine sugar meter is formed so that the electrode group is on the lower side when it is held and used, and is placed in a range that is more than 0.2 mm away from the top of the opening. A urinary sugar concentration sensor unit and a measurement unit for measuring the urinary sugar concentration based on the output of the reaction corresponding to the urinary sugar concentration from the working electrode. Can be similarly implemented.

It is an external view which shows the urine sugar meter using the urine sugar content concentration detection unit. (Example) It is an enlarged view which shows the front of the detection part (opening part is circular shape) of the urine sugar content detection unit. (Example) It is a board | substrate figure which shows the electrode group and wiring pattern inside a detection part. (Example) It is an enlarged view which shows the front of the detection part (opening part is square shape) of the urinary sugar content concentration detection unit. (Example) It is an enlarged view which shows the front of the detection part (opening part is polygonal shape) of the urine sugar content detection unit. (Example) It is a measurement state figure which shows the state in the case of measuring the liquid contained in the container. (Background Technology, Examples) It is a measurement state figure which shows the state in the case of measuring urine in a toilet. (Background Technology, Examples) It is an external view which shows the conventional liquid concentration measuring apparatus or the urine sugar meter of this invention. (Background Technology, Examples) It is a cross-sectional enlarged view which shows the side surface of the detection part of the conventional liquid concentration measuring apparatus or the urine sugar meter of this invention. (Background Technology, Examples) It is an enlarged view which shows the front of the detection part of the conventional liquid concentration measuring apparatus. (Conventional technology) It is a board | substrate figure which shows the electrode group and wiring pattern inside the conventional detection part. (Conventional technology) It is a graph which shows the relationship between a display value (measurement result value) and the actual glucose concentration of a test liquid. (Conventional technology)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,101 Urine sugar meter using urine sugar concentration detection unit 2 Urine sugar concentration detection unit 3 Unit side connection portion 4, 102 Electrode group 4a, 102a Working electrode 4b, 102b Control electrode 4c, 102c Reference electrode 5 Wiring pattern 5a, 106a Wiring pattern from working electrode 5b Wiring pattern from reference electrode 5c Wiring pattern from reference electrode 6, 107 Glass substrate 7, 108 Electronic circuit board 8, 31, 41, 105 Opening 9, 23, 104 External body DESCRIPTION OF SYMBOLS 10 Temperature sensor 21 Main body 22 Main body side connection part 24 Display unit 25 Input part 103 Part to hold 108 Toilet 109 Container

Claims (3)

An electrode group including a working electrode that reacts according to the concentration of a specific component in the liquid, a substrate having a wiring pattern from the electrode group, and an outer body having an opening that is larger than the electrode group. The substrate group and the outer body are provided with a unit side connection portion connected to the electrode group in an adjacent liquid concentration sensor unit while the electrode group is disposed within the opening of the opening, and the electrode group is disposed below the electrode group. In the liquid concentration detection unit used in the aspect set as the side, in the case of the aspect, the wiring pattern from the working electrode is provided in a range at least 0.2 mm away from the uppermost part of the opening. An in-liquid concentration detection unit characterized by comprising: An electrode group including a working electrode that reacts according to the concentration of a specific component in the liquid, a substrate having a wiring pattern from the electrode group, and an outer body having an opening that is larger than the electrode group. The substrate group and the outer body are provided with a unit side connection portion connected to the electrode group in an adjacent liquid concentration sensor unit while the electrode group is disposed within the opening of the opening, and the electrode group is disposed below the electrode group. An in-liquid concentration detection unit used in an aspect of the side;
Based on the reaction corresponding to the concentration of the specific component in the liquid by the main body side connection part and the working electrode, which are separate from the liquid concentration detection unit and connected to the unit side connection part A main body including a measuring unit for measuring the concentration of a specific component in the liquid;
In a liquid concentration measuring device using a liquid concentration detection unit equipped with
In the above aspect, an in-liquid concentration detection unit is characterized in that a wiring pattern from the working electrode is disposed in a range at least more than 0.2 mm away from the uppermost portion of the opening. The liquid concentration measuring device used. An electrode group including a working electrode that reacts according to the concentration of a specific component in the liquid, a substrate having a wiring pattern from the electrode group, and an outer body having an opening that is larger than the electrode group. The substrate and the outer body are arranged adjacent to each other while the electrode group is disposed in the opening of the opening, and the reaction corresponding to the concentration of the specific component in the liquid by the working electrode and a measuring section for measuring the concentration of a specific component in the liquid on the basis of, in the liquid concentration measuring apparatus used in the manner the lower the electrode group, the time of the embodiment, the top of the opening An in-liquid concentration measuring device, characterized in that a wiring pattern from the working electrode is arranged at a distance of at least 0.2 mm away from an upper portion.

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