WO2015022898A1 - Electronic thermometer - Google Patents

Electronic thermometer Download PDF

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Publication number
WO2015022898A1
WO2015022898A1 PCT/JP2014/070828 JP2014070828W WO2015022898A1 WO 2015022898 A1 WO2015022898 A1 WO 2015022898A1 JP 2014070828 W JP2014070828 W JP 2014070828W WO 2015022898 A1 WO2015022898 A1 WO 2015022898A1
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WIPO (PCT)
Prior art keywords
cap
electronic thermometer
temperature
fixing agent
solder
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PCT/JP2014/070828
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French (fr)
Japanese (ja)
Inventor
金治 西村
兼一 西村
加藤　浩之
真治 西村
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興和株式会社
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Publication of WO2015022898A1 publication Critical patent/WO2015022898A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G01K13/20—Clinical contact thermometers for use with humans or animals

Definitions

  • the present invention relates to an electronic thermometer that measures a body temperature by sandwiching a temperature measuring part in a measurement site such as the armpit or the tongue.
  • thermosensitive element such as a thermistor, platinum, or thermocouple
  • a metal cap such as stainless steel
  • the thermosensitive element is fixed by a fixing agent such as an epoxy resin filled in the cap.
  • a fixing agent such as an epoxy resin filled in the cap.
  • the time required for measuring the body temperature with an electronic thermometer generally requires about 10 minutes for the armpit and about 5 minutes for the tongue.
  • Patent Document 1 the shape of the cap is improved, and after making the cap flat, the major axis A, minor axis B, and axial length C are 0.5 ⁇ B / A ⁇ 1.0 and 3 ⁇ . It is designed to satisfy the relationship of B ⁇ C.
  • Patent Document 2 a substrate on which two thin film thermosensitive elements are formed is vertically disposed on the inner wall surface of the cap of the temperature measuring unit, and fixed so that one side surface of the substrate contacts the inner wall surface of the cap.
  • the inner wall surface of the cap and the substrate on which the two thin film thermosensitive elements are mounted are configured to be thermally coupled.
  • the temperature measuring unit is preheated by inserting a temperature measuring unit into a preheating unit provided separately from the electronic thermometer.
  • the preheating unit is controlled so that preheating of the inserted electronic thermometer is automatically started at the time set by the timer, and the temperature measuring unit becomes a constant temperature.
  • the tip portion is filled with a potting material obtained by mixing a material having high thermal conductivity such as alumina or beryllia with a moisture-proof epoxy resin.
  • a chip thermistor is joined in an insulating state to a flat portion on the inner surface of the cap.
  • Patent Document 1 since it is necessary to make the shape of the cap of the temperature measuring part a special shape that satisfies a predetermined condition, not only the manufacturing becomes complicated, but the yield may also deteriorate.
  • Patent Document 2 the number of parts of the temperature measuring unit is large and the internal structure is complicated.
  • patent document 3 the preheating part as a separate body from an electronic thermometer is needed bothersomely, and an electric bill is charged for a user.
  • body temperature is not always measured at the same time set by a timer, it lacks practicality.
  • Patent Document 4 since the thermal conductivity of the epoxy resin itself is poor, only a slight improvement effect can be expected even if a material having high thermal conductivity such as alumina or beryllia is mixed.
  • Patent Document 5 although the thermal conductivity of the surface where the thermistor is in contact with the cap is good, there are many surfaces where the thermistor is in contact with air, resulting in a loss of heat conduction and a large improvement effect cannot be obtained.
  • the present inventors have intensively studied whether the body temperature measurement time can be reduced with a simple configuration without changing the conventional basic configuration, and as a result, have found the following principle, and It came to be completed. That is, in this type of electronic thermometer, the body temperature measurement time greatly depends on the heat transfer rate from the human body to the temperature sensing element, that is, the degree of thermal conductivity between the cap and the fixing agent.
  • the cap is basically metallic, the thermal conductivity is good to some extent.
  • the fixing agent since the fixing agent has generally used a synthetic resin in the past, there is a problem in the thermal conductivity thereof. That is, the main factor that takes time to measure body temperature is that the thermal conductivity of the fixative filled to fix the temperature sensitive element is poor. In other words, if the heat conductivity of the fixative is improved, the body temperature measurement time can be shortened.
  • the present invention solves the above-described problems, and an object thereof is to provide an electronic thermometer that can shorten a body temperature measurement time with a simple configuration.
  • the present invention is an electronic thermometer having a temperature measuring unit in which a temperature sensing element arranged inside a metal cap is fixed by a fixing agent filled inside the cap, It is characterized in that the agent is soldered.
  • cream solder is preferable.
  • the cream solder is a cream-like product obtained by mixing a solder powder and a thixotropic agent such as carnauba wax in a flux as is well known.
  • the thermal conductivity of the fixing agent becomes higher than before, and the Can shorten the time required for temperature measurement with an electronic thermometer.
  • the fixing agent is solder
  • adhesion between the fixing agent and the cap is better than that of a general metal material.
  • heat conduction from the cap to the fixative is also improved, so that the body temperature can be measured quickly and accurately.
  • cream solder is used among the solders, the adhesion between the cap and the fixing agent is further improved.
  • operativity at the time of filling the inside of a cap will also improve.
  • the electronic thermometer of the present invention has a temperature measuring unit in which a temperature sensing element arranged in a cap is fixed by a fixing agent, and the temperature measuring unit is sandwiched mainly in a measurement target site such as an armpit or a tongue.
  • a general electronic thermometer it can be applied to a female thermometer capable of measuring a body temperature with higher accuracy than a general thermometer in order to grasp a physiological cycle and the like.
  • a separate type in which a pen-type temperature measuring unit is connected to the main body by a cable can also be applied.
  • the temperature measuring unit 1 of the electronic thermometer is formed by fixing a temperature sensing element 11 disposed in the cap 10 with a fixing agent 12 filled in the cap 10.
  • Reference numeral 20 denotes a housing of a main body (not shown) of the electronic thermometer or a housing of a base body (not shown) of the pen-type temperature measuring unit.
  • the main body of the electronic thermometer is provided with a liquid crystal display and an on / off switch for displaying the measured body temperature.
  • a microcomputer for measuring and calculating the body temperature is arranged inside the main body. Yes.
  • the casing of the main body is made of synthetic resin such as ABS resin.
  • the cap 10 has a hollow cylindrical shape with its front end closed and its rear end open, and is made of a thin metal with high thermal conductivity, such as a thin stainless steel plate, so that body temperature can be easily transmitted.
  • the cap 10 is inserted into the tip portion of the housing 20.
  • the cap 10 preferably has a diameter (outer diameter) of about 2 to 5 mm (thickness 0.1 mm).
  • a typical example of the temperature sensitive element 11 is a thermistor, but a platinum wire or a thermocouple can also be used.
  • the temperature sensing element 11 is connected to a microcomputer or the like of the main body through a lead wire 13.
  • a conductive wire 13 coated with an insulating resin such as polyimide, since there is no problem because the insulating state is maintained even if solder adheres during the manufacturing process.
  • the temperature sensing element 11 is arranged so as to be positioned at the radial center of the cap 10.
  • the distance from the outer surface of the temperature measuring unit 1 (cap 10) to the temperature sensing element 11 becomes constant, so that the temperature measuring unit 1 can be placed at a measurement site such as a armpit at any angle (rotation angle). Even if it is sandwiched, the temperature measurement time can be made uniform.
  • the temperature sensitive element 11 is preferably as close as possible to the cap 10, and the temperature sensitive element 11 and the cap 10 are preferably in contact or close to each other.
  • a thermistor having a diameter of about 0.2 to 2 mm is preferable.
  • solder is used for the fixing agent 12.
  • heat conductivity improves
  • the heat transfer speed to the temperature sensing element 11 improves, and body temperature measurement time can be shortened.
  • Solder is used for the purpose of improving thermal conductivity, and since electrical conductivity is not directly related, basically any solder can be used.
  • general solder mainly composed of lead and tin can be used, but lead-free solder (lead-free solder) is preferable from the viewpoint of influence on the human body and environmental load.
  • solder containing flux is preferable, and eutectic solder having the lowest melting point among solders is also preferable in that the heating temperature during filling can be suppressed.
  • cream solder is most preferable overall from the viewpoints of bondability (adhesion with the cap) and filling workability.
  • the filling amount should be 0.01 to 0.5 g. desirable.
  • the amount of cream solder used can be measured even at about 0.01 g, and the upper limit is about 0.5 g. A larger amount is unnecessary because it overflows from the cap.
  • the fixing agent 12 in a molten state may be poured and filled in the cap 10 while the temperature sensing element 11 is supported at a predetermined position, and the fixing agent 12 may be solidified as it is.
  • the temperature-sensitive element 11 can be embedded after the cream-like fixing agent 12 is filled in the cap 10 and solidified by heating.
  • Example 1 The electronic thermometer “Sophie Array BT-16R” manufactured by Nishitomo Co., Ltd. was used for the main body of the electronic thermometer.
  • a temperature measuring unit was manufactured as follows. After filling the stainless steel cap with cream solder as a fixing agent using a dispenser, the thermistor was inserted into the cap as a temperature sensitive element and heated to solidify the cream solder, thereby fixing the thermistor. Then, it was set as the electronic thermometer of Example 1 by attaching the said temperature measurement part to the main-body part of an electronic thermometer. The results of measuring body temperature using the electronic thermometer of Example 1 are shown in FIG. The site to be measured was sublingual.
  • Example 2 An electronic thermometer of Example 2 was obtained in the same manner as in Example 1 except that the fixing agent was eutectic solder. The results of measuring the body temperature in the same manner as in Example 1 using the electronic thermometer of Example 2 are also shown in FIG.
  • FIG. 2 also shows the results of measuring body temperature in the same manner as in Example 1 using an electronic female thermometer “Sophia Array BT-16R” manufactured by Nishitomo Co., Ltd., which is currently commercially available.
  • the epoxy resin was used for the fixing agent here.
  • the heat capacity of the epoxy resin (with alumina) filled in Comparative Example 1 is 0.07 J / ° C.
  • the heat capacity of the cream solder used in Example 1 is 0.02 J / ° C. Therefore, the heat capacity of the temperature measuring unit is reduced to 1/3 or less of the conventional one by changing from epoxy resin to cream solder.
  • Example 1 in which cream solder was used as a fixative, the body temperature measurement time (time until the temperature became constant) was about 45 seconds.
  • Example 2 using eutectic solder as a fixing agent, the body temperature measurement time was about 200 seconds.
  • the conventional product Comparative Example 1 using a synthetic resin as a fixing agent, the body temperature measurement time was over 300 seconds.
  • the body temperature measurement time can be shortened by using a solder having a higher thermal conductivity than the synthetic resin as a fixing agent.
  • the subjects in Examples 1 and 2 and Comparative Example 1 are the same person, but the measured body temperature is different because the body temperature measurement date is different.

Abstract

Provided is an electronic thermometer capable of reducing a body temperature measurement time using a simple configuration. This electronic thermometer has a temperature measurement unit (1) formed through the fixing of a thermosensor (11) disposed inside a metallic cap (10) using a fixative (12) that the inside of the cap (10) is filled with. Further, as the fixative (12), a solder is used. In particular, it is preferable to use a cream solder.

Description

電子体温計Electronic thermometer
　本発明は、腋下や舌下等の被測定部位に測温部を挟み込むことで体温を測定する電子体温計に関する。 The present invention relates to an electronic thermometer that measures a body temperature by sandwiching a temperature measuring part in a measurement site such as the armpit or the tongue.
　この種の電子体温計においては、ステンレス等の金属製キャップ内へ、サーミスタ、白金、熱電対等の感温素子を挿入し、当該感温素子を、キャップ内へ充填したエポキシ樹脂などの固定剤によって固定することで、測温部が構成されていることが一般的である。このような構成の測温部を有する電子体温計によって体温を測定する際は、人体に接触している金属製キャップに体温が伝わり、続いて固定剤を介して感温素子へ体温が伝わることで体温が測定されることになる。 In this type of electronic thermometer, a thermosensitive element such as a thermistor, platinum, or thermocouple is inserted into a metal cap such as stainless steel, and the thermosensitive element is fixed by a fixing agent such as an epoxy resin filled in the cap. By doing so, it is common that the temperature measuring unit is configured. When body temperature is measured by an electronic thermometer having a temperature measuring unit having such a configuration, body temperature is transmitted to a metal cap that is in contact with the human body, and then the body temperature is transmitted to the thermosensitive element via a fixing agent. Body temperature will be measured.
　ところで、現在一般的に普及している電子体温計による体温の測定時間は、概ね腋下であれば１０分程度、舌下であれば５分程度を必要とする場合が多い。しかしながら、このように約５分～１０分もの間電子体温計を所定位置に保持しておくことは煩わしい。したがって、従来から体温測定時間の短縮が強く要望されている。 By the way, in many cases, the time required for measuring the body temperature with an electronic thermometer, which is currently in widespread use, generally requires about 10 minutes for the armpit and about 5 minutes for the tongue. However, it is troublesome to hold the electronic thermometer in a predetermined position for about 5 to 10 minutes. Therefore, there has been a strong demand for shortening of the body temperature measurement time.
　そこで、体温測定時間の短縮を図った電子体温計として、例えば下記特許文献１～３が提案されている。特許文献１では、キャップの形状を改良しており、キャップを偏平としたうえで、長径Ａ、短径Ｂ、軸方向長さＣが、０．５≦Ｂ／Ａ＜１．０かつ３×Ｂ≦Ｃの関係を満たすように設計している。特許文献２では、測温部のキャップの内壁面に、２つの薄膜感熱素子が形成された基板を垂直に配置し、当該基板の一側面がキャップ内壁面に接触するように固定することによって、キャップの内壁面と２つの薄膜感熱素子が載置された基板間が熱的に結合されるように構成されている。特許文献３では、電子体温計とは別体として設けた予熱部に測温部を挿入しておくことによって、測温部を予め加熱している。当該予熱部は、タイマ設定された時刻において、挿入された電子体温計の予熱を自動的に開始し、測温部が一定の温度となるように制御されている。特許文献４では、アルミナ、ベリリア等の熱伝導率の高い材料を防湿性のエポキシ樹脂に混合したポッティング材を先端部に充填している。特許文献５では、キャップ内面の平坦部にチップ型サーミスタが絶縁状態で接合されている。 Therefore, for example, the following Patent Documents 1 to 3 have been proposed as electronic thermometers for shortening the body temperature measurement time. In Patent Document 1, the shape of the cap is improved, and after making the cap flat, the major axis A, minor axis B, and axial length C are 0.5 ≦ B / A <1.0 and 3 ×. It is designed to satisfy the relationship of B ≦ C. In Patent Document 2, a substrate on which two thin film thermosensitive elements are formed is vertically disposed on the inner wall surface of the cap of the temperature measuring unit, and fixed so that one side surface of the substrate contacts the inner wall surface of the cap. The inner wall surface of the cap and the substrate on which the two thin film thermosensitive elements are mounted are configured to be thermally coupled. In Patent Document 3, the temperature measuring unit is preheated by inserting a temperature measuring unit into a preheating unit provided separately from the electronic thermometer. The preheating unit is controlled so that preheating of the inserted electronic thermometer is automatically started at the time set by the timer, and the temperature measuring unit becomes a constant temperature. In Patent Document 4, the tip portion is filled with a potting material obtained by mixing a material having high thermal conductivity such as alumina or beryllia with a moisture-proof epoxy resin. In Patent Document 5, a chip thermistor is joined in an insulating state to a flat portion on the inner surface of the cap.
特開２０１２－２５１７７１号公報JP 2012-251771 A 特開２００６－２５８５２０号公報JP 2006-258520 A 特開平１０－２７４５６６号公報JP-A-10-274666 特公平２－２３８１４号公報JP-B-2-23814 特開２００４－３３５７９３号公報JP 2004-335793 A
　しかしながら、特許文献１では、測温部のキャップの形状を所定の条件を満たす特殊な形状とする必要があるため、製造が煩雑となるばかりか、歩留まりも悪化するおそれがある。特許文献２では、測温部の部品点数が多く内部構造も複雑となる。特許文献３では、わざわざ電子体温計とは別体としての予熱部を必要としており、且つ使用者にとっては電気代がかかる。また、常にタイマ設定した同じ時間に体温を測定するとは限らないため、実用性にも欠ける。特許文献４では、エポキシ樹脂自体の熱伝導率が悪いので、アルミナ、ベリリア等の熱伝導率の高い材料を混合しても若干改善する程度の効果しか望めない。特許文献５では、サーミスタがキャップに触れている面の熱伝導率は良いが、空気に触れている面が多いため、結果として熱伝導のロスになり、大きな改善効果は得られない。 However, in Patent Document 1, since it is necessary to make the shape of the cap of the temperature measuring part a special shape that satisfies a predetermined condition, not only the manufacturing becomes complicated, but the yield may also deteriorate. In Patent Document 2, the number of parts of the temperature measuring unit is large and the internal structure is complicated. In patent document 3, the preheating part as a separate body from an electronic thermometer is needed bothersomely, and an electric bill is charged for a user. Moreover, since body temperature is not always measured at the same time set by a timer, it lacks practicality. In Patent Document 4, since the thermal conductivity of the epoxy resin itself is poor, only a slight improvement effect can be expected even if a material having high thermal conductivity such as alumina or beryllia is mixed. In Patent Document 5, although the thermal conductivity of the surface where the thermistor is in contact with the cap is good, there are many surfaces where the thermistor is in contact with air, resulting in a loss of heat conduction and a large improvement effect cannot be obtained.
　このような問題に鑑みて、従来からの基本的構成を変更することなく簡素な構成で体温測定時間を短縮できないかと本発明者らが鋭意検討の結果、次の原理を知見し、本発明を完成するに至った。すなわち、この種の電子体温計においては、人体から感温素子までの熱伝達速度、すなわちキャップと固定剤の熱伝導率の程度により、体温の測定時間が大きく左右される。ここで、キャップは基本的に金属性なので、ある程度熱伝導率は良好である。これに対し固定剤は、従来は一般的に合成樹脂が使用されていたため、これの熱伝導率には課題がある。つまり、体温測定に時間がかかる主要因として、感温素子を固定するために充填される固定剤の熱伝導率が悪いことが挙げられる。換言すれば、固定剤の熱伝導率を向上すれば、体温測定時間を短縮することができることになる。 In view of such problems, the present inventors have intensively studied whether the body temperature measurement time can be reduced with a simple configuration without changing the conventional basic configuration, and as a result, have found the following principle, and It came to be completed. That is, in this type of electronic thermometer, the body temperature measurement time greatly depends on the heat transfer rate from the human body to the temperature sensing element, that is, the degree of thermal conductivity between the cap and the fixing agent. Here, since the cap is basically metallic, the thermal conductivity is good to some extent. On the other hand, since the fixing agent has generally used a synthetic resin in the past, there is a problem in the thermal conductivity thereof. That is, the main factor that takes time to measure body temperature is that the thermal conductivity of the fixative filled to fix the temperature sensitive element is poor. In other words, if the heat conductivity of the fixative is improved, the body temperature measurement time can be shortened.
　そこで、本発明は上記課題を解決するものであって、簡素な構成で体温測定時間を短縮できる電子体温計を提供することを目的とする。 Therefore, the present invention solves the above-described problems, and an object thereof is to provide an electronic thermometer that can shorten a body temperature measurement time with a simple configuration.
　そのための手段として、本発明は、金属製キャップの内部に配された感温素子が、前記キャップの内部に充填した固定剤によって固定されて成る測温部を有する電子体温計であって、前記固定剤をハンダとした点に特徴を有する。中でも、クリームハンダが好適である。なお、クリームハンダとは、公知のごとくフラックス中にハンダ粉末と共にカルナバろう等のチクソ剤が混合されたものであって、常温でクリーム状のものをいう。 As a means for this, the present invention is an electronic thermometer having a temperature measuring unit in which a temperature sensing element arranged inside a metal cap is fixed by a fixing agent filled inside the cap, It is characterized in that the agent is soldered. Among these, cream solder is preferable. The cream solder is a cream-like product obtained by mixing a solder powder and a thixotropic agent such as carnauba wax in a flux as is well known.
　本発明によれば、従来一般的であった合成樹脂製の固定剤に換えて、金属製の固定剤を使用していることで、従来よりも固定剤の熱伝導率が高くなり、延いては電子体温計による体温測定時間を短縮することができる。このとき、固定剤がハンダであれば、一般的な金属材料よりも固定剤とキャップとの密着性が良好となる。これにより、キャップから固定剤への熱伝道も良好となるので、体温を迅速且つ精度良く測定することができる。特に、ハンダの中でもクリームハンダを使用すれば、キャップと固定剤との密着性がより向上する。また、クリームハンダであれば、キャップの内部へ充填する際の作業性も向上する。 According to the present invention, by using a metal fixing agent instead of the conventional synthetic resin fixing agent, the thermal conductivity of the fixing agent becomes higher than before, and the Can shorten the time required for temperature measurement with an electronic thermometer. At this time, if the fixing agent is solder, adhesion between the fixing agent and the cap is better than that of a general metal material. As a result, heat conduction from the cap to the fixative is also improved, so that the body temperature can be measured quickly and accurately. In particular, if cream solder is used among the solders, the adhesion between the cap and the fixing agent is further improved. Moreover, if it is cream solder, the workability | operativity at the time of filling the inside of a cap will also improve.
測温部の断面図である。It is sectional drawing of a temperature measurement part. 体温測定時間を計測した結果を示すグラフである。It is a graph which shows the result of having measured body temperature measurement time.
　以下、本発明について詳しく説明する。本発明の電子体温計としては、キャップ内に配された感温素子が固定剤によって固定されて成る測温部を有し、主として腋下や舌下等の被測定部位に測温部を挟み込むことで体温を測定するものであれば特に限定されず、一般的な電子体温計のほか、生理周期などを把握するため一般的な体温計よりも高精度に体温を測定可能な婦人体温計にも適用できる。また、本体部の先端に測温部が設けられた一体型の電子体温計のほか、ペン型の測温部が本体部とケーブルで繋がれたセパレートタイプのものにも適用可能である。 Hereinafter, the present invention will be described in detail. The electronic thermometer of the present invention has a temperature measuring unit in which a temperature sensing element arranged in a cap is fixed by a fixing agent, and the temperature measuring unit is sandwiched mainly in a measurement target site such as an armpit or a tongue. In addition to a general electronic thermometer, it can be applied to a female thermometer capable of measuring a body temperature with higher accuracy than a general thermometer in order to grasp a physiological cycle and the like. In addition to an integrated electronic thermometer in which a temperature measuring unit is provided at the tip of the main body, a separate type in which a pen-type temperature measuring unit is connected to the main body by a cable can also be applied.
　電子体温計の測温部１は、図１に示すように、キャップ１０の内部に配された感温素子１１が、同じくキャップ１０の内部に充填した固定剤１２によって固定されて成る。符号２０は、電子体温計の本体部（図示せず）の筐体、またはペン型測温部の基体部（図示せず）の筐体である。電子体温計の本体部には、計測された体温等を表示する液晶表示部やオン／オフスイッチなどが設けられており、本体部の内部には、体温を計測演算するマイクロコンピュータなどが配されている。なお、本体部の筐体は、ＡＢＳ樹脂などの合成樹脂製である。 As shown in FIG. 1, the temperature measuring unit 1 of the electronic thermometer is formed by fixing a temperature sensing element 11 disposed in the cap 10 with a fixing agent 12 filled in the cap 10. Reference numeral 20 denotes a housing of a main body (not shown) of the electronic thermometer or a housing of a base body (not shown) of the pen-type temperature measuring unit. The main body of the electronic thermometer is provided with a liquid crystal display and an on / off switch for displaying the measured body temperature. A microcomputer for measuring and calculating the body temperature is arranged inside the main body. Yes. The casing of the main body is made of synthetic resin such as ABS resin.
　キャップ１０は、先端が閉塞し後端が開口する中空筒状を呈し、体温が伝わり易いように、熱伝導率の高い薄肉の金属、例えば薄いステンレス板などからなる。キャップ１０は、筐体２０の先端部分へ挿嵌される。尚、キャップ１０としては、直径（外径）２～５mm（肉厚０．１mm）程度のものが好ましい。 The cap 10 has a hollow cylindrical shape with its front end closed and its rear end open, and is made of a thin metal with high thermal conductivity, such as a thin stainless steel plate, so that body temperature can be easily transmitted. The cap 10 is inserted into the tip portion of the housing 20. The cap 10 preferably has a diameter (outer diameter) of about 2 to 5 mm (thickness 0.1 mm).
　感温素子１１としては、代表的にはサーミスタが挙げられるが、他にも白金線や熱電対を使用することもできる。感温素子１１は、導線１３を介して本体部のマイクロコンピュータなどと連結されている。ここに導線１３は、ポリイミド等の絶縁樹脂でコーティングしたものを用いるのが、製造過程でハンダが付着しても絶縁状態が保持されているので問題が生じず有利である。また、感温素子１１は、キャップ１０の径方向中央部に位置するよう配されている。これにより、測温部１（キャップ１０）の外面から感温素子１１までの距離が一定となることで、測温部１をどのような角度（回転角度）で腋下などの被測定部位に挟み込んでも、体温計測時間を均一化できる。また、軸方向では、感温素子１１はキャップ１０とできるだけ近いことが好ましく、感温素子１１とキャップ１０とを接触ないし近接させておくことが好ましい。尚、サーミスタとしては、直径０．２～２mm程度のものが好ましい。 A typical example of the temperature sensitive element 11 is a thermistor, but a platinum wire or a thermocouple can also be used. The temperature sensing element 11 is connected to a microcomputer or the like of the main body through a lead wire 13. Here, it is advantageous to use a conductive wire 13 coated with an insulating resin such as polyimide, since there is no problem because the insulating state is maintained even if solder adheres during the manufacturing process. Further, the temperature sensing element 11 is arranged so as to be positioned at the radial center of the cap 10. As a result, the distance from the outer surface of the temperature measuring unit 1 (cap 10) to the temperature sensing element 11 becomes constant, so that the temperature measuring unit 1 can be placed at a measurement site such as a armpit at any angle (rotation angle). Even if it is sandwiched, the temperature measurement time can be made uniform. In the axial direction, the temperature sensitive element 11 is preferably as close as possible to the cap 10, and the temperature sensitive element 11 and the cap 10 are preferably in contact or close to each other. A thermistor having a diameter of about 0.2 to 2 mm is preferable.
　固定剤１２にはハンダが使用される。これにより、従来の合成樹脂からなる固定剤に比べて熱伝導率が向上することで、感温素子１１への熱伝達速度が向上し、体温計測時間を短縮することができる。ハンダは、熱伝導率の向上を目的として使用されており、電気伝導率は直接関係無いので、基本的にはどのようなハンダでも使用可能である。具体的には、鉛と錫を主成分とする一般的なハンダを使用することもできるが、人体への影響や環境負荷の観点からは鉛フリーハンダ（無鉛ハンダ）が好ましい。また、接合性の観点からはフラックス入りハンダが好適であり、充填する際の加熱温度を抑えられる点においては、ハンダの中でも融点が最も低い共晶ハンダも好適である。中でも、接合性（キャップとの密着性）や充填作業性などの観点から総合的に最も好ましいのは、クリームハンダである。ハンダを充填するに当っては、その量が多くなるに従って測温部全体の熱容量が増大し、測定時間の短縮化が阻害されるので、充填量を０．０１～０．５ｇとするのが望ましい。因みに、クリームハンダの使用量は０．０１ｇ程度でも測定可能であり、上限は０．５ｇ程度である。これ以上の量はキャップからあふれてしまうため不要となる。 ¡Solder is used for the fixing agent 12. Thereby, compared with the fixing agent which consists of the conventional synthetic resin, heat conductivity improves, The heat transfer speed to the temperature sensing element 11 improves, and body temperature measurement time can be shortened. Solder is used for the purpose of improving thermal conductivity, and since electrical conductivity is not directly related, basically any solder can be used. Specifically, general solder mainly composed of lead and tin can be used, but lead-free solder (lead-free solder) is preferable from the viewpoint of influence on the human body and environmental load. From the viewpoint of bonding properties, solder containing flux is preferable, and eutectic solder having the lowest melting point among solders is also preferable in that the heating temperature during filling can be suppressed. Among these, cream solder is most preferable overall from the viewpoints of bondability (adhesion with the cap) and filling workability. When filling the solder, as the amount increases, the heat capacity of the entire temperature measuring section increases and the shortening of the measurement time is impeded, so the filling amount should be 0.01 to 0.5 g. desirable. Incidentally, the amount of cream solder used can be measured even at about 0.01 g, and the upper limit is about 0.5 g. A larger amount is unnecessary because it overflows from the cap.
　測温部１を製造する際は、キャップ１０の内部に感温素子１１を所定位置に支持した状態で溶融状態の固定剤１２を流し込んで充填し、そのまま固定剤１２を固化してもよいし、クリームハンダであれば、クリーム状態の固定剤１２をキャップ１０内に充填してから感温素子１１を埋め込み、加熱して固化することもできる。 When manufacturing the temperature measuring unit 1, the fixing agent 12 in a molten state may be poured and filled in the cap 10 while the temperature sensing element 11 is supported at a predetermined position, and the fixing agent 12 may be solidified as it is. In the case of cream solder, the temperature-sensitive element 11 can be embedded after the cream-like fixing agent 12 is filled in the cap 10 and solidified by heating.
　以下、実施例に基づき本発明を具体的に説明するが、これに限られず、本発明の要旨を逸脱しない範囲で、種々変更が可能であることはいうまでもない。 Hereinafter, the present invention will be specifically described based on examples, but it is needless to say that the present invention is not limited thereto and can be variously modified without departing from the gist of the present invention.
（実施例１）
　電子体温計の本体部には、(株)ニシトモ製の電子婦人体温計「ソフィアレイ　ＢＴ－１６Ｒ」を使用した。そのうえで、測温部を次のように製造した。ステンレス製のキャップ内に、固定剤としてクリームハンダをディスペンサにより充填した後、感温素子としてサーミスタをキャップ内へ挿入し、加熱してクリームハンダを固化することで、サーミスタを固定した。その後、当該測温部を電子体温計の本体部へ取り付けることで、実施例１の電子体温計とした。当該実施例１の電子体温計を使用して体温を測定した結果を図２に示す。なお、被測定部位は舌下とした。 Example 1
The electronic thermometer “Sophie Array BT-16R” manufactured by Nishitomo Co., Ltd. was used for the main body of the electronic thermometer. In addition, a temperature measuring unit was manufactured as follows. After filling the stainless steel cap with cream solder as a fixing agent using a dispenser, the thermistor was inserted into the cap as a temperature sensitive element and heated to solidify the cream solder, thereby fixing the thermistor. Then, it was set as the electronic thermometer of Example 1 by attaching the said temperature measurement part to the main-body part of an electronic thermometer. The results of measuring body temperature using the electronic thermometer of Example 1 are shown in FIG. The site to be measured was sublingual.
（実施例２）
　固定剤を共晶ハンダとした以外は、実施例１と同様にして実施例２の電子体温計とした。当該実施例２の電子体温計を使用して実施例１と同様に体温を測定した結果も、図２に示す。 (Example 2)
An electronic thermometer of Example 2 was obtained in the same manner as in Example 1 except that the fixing agent was eutectic solder. The results of measuring the body temperature in the same manner as in Example 1 using the electronic thermometer of Example 2 are also shown in FIG.
（比較例１）
　また、現在市販されている(株)ニシトモ製の電子婦人体温計「ソフィアレイ　ＢＴ－１６Ｒ」そのものを使用して、実施例１と同様に体温を測定した結果も、図２に示す。なお、ここでの固定剤には、エポキシ樹脂を使用した。 (Comparative Example 1)
FIG. 2 also shows the results of measuring body temperature in the same manner as in Example 1 using an electronic female thermometer “Sophia Array BT-16R” manufactured by Nishitomo Co., Ltd., which is currently commercially available. In addition, the epoxy resin was used for the fixing agent here.
　比較例１で充填されるエポキシ樹脂（アルミナ入り）の熱容量は０．０７Ｊ／℃である。一方、実施例１で用いるクリームハンダの熱容量は０．０２Ｊ／℃である。よって測温部の熱容量は、エポキシ樹脂からクリームハンダに変えることで、従来の３分の１以下になる。 The heat capacity of the epoxy resin (with alumina) filled in Comparative Example 1 is 0.07 J / ° C. On the other hand, the heat capacity of the cream solder used in Example 1 is 0.02 J / ° C. Therefore, the heat capacity of the temperature measuring unit is reduced to 1/3 or less of the conventional one by changing from epoxy resin to cream solder.
　図２の結果から明らかなように、固定剤としてクリームハンダを用いた実施例１では、体温計測時間（温度が一定となるまでの時間）が約４５秒であった。また、固定剤として共晶ハンダを用いた実施例２では、体温計測時間は約２００秒であった。これに対し、固定剤として合成樹脂を使用している従来品（比較例１）では、体温計測時間は３００秒オーバーであった。これにより、固定剤として合成樹脂より熱伝導率の高いハンダを使用すれば、体温計測時間を短縮できることが確認された。なお、実施例１，２及び比較例１の被験者は同一人物であるが、計測体温が異なるのは、体温計測日が異なるためである。 As is clear from the results of FIG. 2, in Example 1 in which cream solder was used as a fixative, the body temperature measurement time (time until the temperature became constant) was about 45 seconds. In Example 2 using eutectic solder as a fixing agent, the body temperature measurement time was about 200 seconds. On the other hand, in the conventional product (Comparative Example 1) using a synthetic resin as a fixing agent, the body temperature measurement time was over 300 seconds. Thus, it was confirmed that the body temperature measurement time can be shortened by using a solder having a higher thermal conductivity than the synthetic resin as a fixing agent. The subjects in Examples 1 and 2 and Comparative Example 1 are the same person, but the measured body temperature is different because the body temperature measurement date is different.
１　測温部
１０　キャップ
１１　感温素子
１２　固定剤
１３　導線
２０　筐体 DESCRIPTION OF SYMBOLS 1 Temperature measuring part 10 Cap 11 Temperature sensing element 12 Fixing agent 13 Conductive wire 20 Case

Claims (4)

  1. 　金属製キャップの内部に配された感温素子が、前記キャップの内部に充填した固定剤によって固定されて成る測温部を有する電子体温計であって、
    　前記固定剤が、ハンダからなることを特徴とする、電子体温計。     An electronic thermometer having a temperature measuring unit in which a temperature sensing element arranged inside a metal cap is fixed by a fixing agent filled inside the cap,
    An electronic thermometer, wherein the fixing agent is made of solder.
  2. 　前記固定剤がクリームハンダである、請求項１に記載の電子体温計。 The electronic thermometer according to claim 1, wherein the fixing agent is cream solder.
  3. 　前記ハンダのキャップ内部における充填量が０．０１～０．５ｇである、請求項１又は２記載の電子体温計。 The electronic thermometer according to claim 1 or 2, wherein a filling amount inside the cap of the solder is 0.01 to 0.5 g.
  4. 　前記感温素子の導線が絶縁樹脂でコーティングされている、請求項１～３の何れか１項記載の電子体温計。 The electronic thermometer according to any one of claims 1 to 3, wherein the conductor of the temperature sensing element is coated with an insulating resin.
PCT/JP2014/070828 2013-08-12 2014-08-07 Electronic thermometer WO2015022898A1 (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN105078417A (en) * 2015-05-20 2015-11-25 上海温尔信息科技有限公司 Electronic clinical thermometer

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Publication number Priority date Publication date Assignee Title
JPS621136U (en) * 1985-06-18 1987-01-07
JPH11223557A (en) * 1998-02-05 1999-08-17 Showa Electric Wire & Cable Co Ltd Structure for measuring temperature of cable conductor
JPH11233915A (en) * 1998-02-10 1999-08-27 Sharp Corp Mounted printed wiring board
JP2006098180A (en) * 2004-09-29 2006-04-13 Citizen Watch Co Ltd Manufacturing method for electronic clinical thermometer

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS621136U (en) * 1985-06-18 1987-01-07
JPH11223557A (en) * 1998-02-05 1999-08-17 Showa Electric Wire & Cable Co Ltd Structure for measuring temperature of cable conductor
JPH11233915A (en) * 1998-02-10 1999-08-27 Sharp Corp Mounted printed wiring board
JP2006098180A (en) * 2004-09-29 2006-04-13 Citizen Watch Co Ltd Manufacturing method for electronic clinical thermometer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105078417A (en) * 2015-05-20 2015-11-25 上海温尔信息科技有限公司 Electronic clinical thermometer

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