JPH0854295A - Temperature sensor - Google Patents
Temperature sensorInfo
- Publication number
- JPH0854295A JPH0854295A JP19422795A JP19422795A JPH0854295A JP H0854295 A JPH0854295 A JP H0854295A JP 19422795 A JP19422795 A JP 19422795A JP 19422795 A JP19422795 A JP 19422795A JP H0854295 A JPH0854295 A JP H0854295A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- holder
- element holder
- temperature detector
- sensitive element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- Fixing For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複写機やレーザープリ
ンタの定着ロール等回転加熱体の温度制御に用いられる
温度検知器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature detector used for controlling the temperature of a rotary heating member such as a fixing roll of a copying machine or a laser printer.
【０００２】[0002]
【従来の技術】近年、複写機やレーザープリンタの定着
ロール等回転加熱体の温度制御等に、所謂ソフトタッチ
センサ（以下「ＳＴＳ」と略す。）と称される温度検知
器が実用に供されている。2. Description of the Related Art In recent years, a temperature detector called a so-called soft touch sensor (hereinafter abbreviated as "STS") has been put to practical use for temperature control of a rotary heating member such as a fixing roll of a copying machine or a laser printer. ing.
【０００３】この温度検知器の概要は、実公昭５７−１
９６１２号公報、考案の名称「温度検知器」によって開
示され、その後、当該出願人は熱応答性、耐久性等につ
いて改善を施した温度検知器（実願平２−４８６９号）
を提案している。The outline of this temperature detector is as follows:
No. 9612, a temperature detector disclosed by the name of the device, "Temperature Detector", and the applicant later improved the thermal response, durability, etc. (Japanese Patent Application No. 2-4869).
Is proposed.
【０００４】図６（ａ）は、上記提案の温度検知器の構
成を説明するための斜視図、同図（ｂ）は、その正面図
である。シリコーンゴムからなる耐熱スポンジ１２の上
面に、高熱伝導率シリコーンゴム成形体の感熱素子保持
体１３が形成され、その中心部にはサーミスタ１４が一
体成形されて埋め込まれている。シリコーンゴムスポン
ジ１２は、裏面に導体パターンが形成されたガラスエポ
キシ等からなるプリント配線基板１５に取り付けられて
いる。感熱素子保持体１３の両側面から出ているサーミ
スタのリード線１６は、プリント配線基板１５の前部と
後部に設けられている穴１７をそれぞれ通って裏面の導
体パターンのランドに半田付けされている。温度検知器
のリード線１８は、同様に導体パターンのランドに半田
付けされ、サーミスタのリード線１６と電気的に接続さ
れている。上記プリント配線基板１５と、感熱素子保持
体１３を搭載したシリコーンゴムスポンジ１２の組体に
は、ポリイミドテープ１９が感熱素子保持体１３の上面
全体を覆い、且つプリント配線基板１５の裏面側まで巻
き付けられている。FIG. 6 (a) is a perspective view for explaining the structure of the above proposed temperature detector, and FIG. 6 (b) is a front view thereof. On the upper surface of the heat-resistant sponge 12 made of silicone rubber, a thermosensitive element holder 13 of a high thermal conductivity silicone rubber molded body is formed, and a thermistor 14 is integrally molded and embedded in the center thereof. The silicone rubber sponge 12 is attached to a printed wiring board 15 made of glass epoxy or the like having a conductor pattern formed on the back surface. Lead wires 16 of the thermistor, which are projected from both side surfaces of the thermosensitive element holder 13, are soldered to the lands of the conductor pattern on the back surface through the holes 17 provided in the front and rear portions of the printed wiring board 15, respectively. There is. Similarly, the lead wire 18 of the temperature detector is soldered to the land of the conductor pattern and is electrically connected to the lead wire 16 of the thermistor. A polyimide tape 19 covers the entire upper surface of the heat sensitive element holder 13 and is wound up to the back side of the printed wiring board 15 on the assembly of the printed wiring board 15 and the silicone rubber sponge 12 on which the heat sensitive element holder 13 is mounted. Has been.
【０００５】このように構成された温度検知器１１は、
感熱素子保持体１３の上面（サーミスタ１４の搭載面）
がポリイミドテープ１９を介して、例えば複写機の回転
加熱体である定着ロールの表面に押し当てられ、プリン
ト配線基板１５の前後の突起部２０によって複写機基部
に固定される。The temperature detector 11 thus constructed is
The upper surface of the thermosensitive element holder 13 (mounting surface of the thermistor 14)
Is pressed against the surface of a fixing roll, which is a rotary heating body of a copying machine, through a polyimide tape 19, and is fixed to the base of the copying machine by front and rear projections 20 of the printed wiring board 15.
【０００６】[0006]
【発明が解決しようとする課題】上記温度検知器１１
は、開示当初のものに比べ、上述のようにシリコーンゴ
ムスポンジ１２の上面に、集熱と感熱素子の保持機能を
有する感熱素子保持体１３を設けることにより、熱応答
性や耐久性を向上させている。しかしながら、前記温度
検知器１１においては、感熱素子保持体１３の表面全体
でヒートロール等回転加熱体の温度を検知する構造にな
っているため、近年多く見られる直径が２５ｍｍ以下の
ヒートロールの温度を検知する場合には、図５のように
ＳＴＳの適正荷重（１００〜２００ｇ）では、感熱素子
保持体の表面全体をヒートロール３１に接触させること
ができず、良好な温度検知を行うことができないという
欠点がある。The temperature detector 11 described above is to be solved.
In comparison with the one initially disclosed, the thermal responsiveness and durability are improved by providing the heat sensitive element holding body 13 having the function of collecting heat and holding the heat sensitive element on the upper surface of the silicone rubber sponge 12 as described above. ing. However, since the temperature detector 11 has a structure for detecting the temperature of a rotary heating body such as a heat roll on the entire surface of the thermosensitive element holder 13, the temperature of the heat roll having a diameter of 25 mm or less, which is often seen in recent years, is used. In the case of detecting, the entire surface of the heat-sensitive element holder cannot be brought into contact with the heat roll 31 with an appropriate load of STS (100 to 200 g) as shown in FIG. 5, and good temperature detection can be performed. There is a drawback that you cannot do it.
【０００７】本発明の目的は、このような欠点を解消
し、回転加熱体の直径が２５ｍｍ以下であっても、ＳＴ
Ｓの適正荷重（１００〜２００ｇ）で感熱素子保持体の
表面全体を回転加熱体に接触させることにより、熱応答
性等に優れ、良好な温度検知を行うことができる温度検
知器を提供することにある。The object of the present invention is to solve the above-mentioned drawbacks and to provide the ST even if the diameter of the rotary heating element is 25 mm or less.
To provide a temperature detector which is excellent in thermal responsiveness and can perform good temperature detection by bringing the entire surface of a thermosensitive element holder into contact with a rotary heating element with an appropriate load of S (100 to 200 g). It is in.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するべく
本発明による温度検知器は、感熱素子と、熱伝導性及び
耐熱性に優れた成形物の感熱素子保持体と、前記感熱素
子保持体を支持するスポンジ状弾性体と、これらを被包
し回転加熱体に円滑に接する摩擦係数の少ない耐熱絶縁
フィルムとからなる温度検知器において、前記感熱素子
保持体または前記スポンジ状弾性体のうち少なくとも一
方が前記回転加熱体の形状に沿って略等しい曲面を有し
ていることを特徴とするものである。In order to achieve the above object, a temperature detector according to the present invention comprises a heat sensitive element, a heat sensitive element holder of a molded article having excellent thermal conductivity and heat resistance, and the heat sensitive element holder. In a temperature detector comprising a sponge-like elastic body supporting the heat-resistant insulating film having a small friction coefficient and enclosing the sponge-like elastic body and at least one of the heat-sensitive element holding body and the sponge-like elastic body. One of them has a curved surface that is substantially equal to the shape of the rotary heating body.
【０００９】[0009]
【作用】このような構成によれば、感熱素子保持体また
はスポンジ状弾性体のうち少なくとも一方が回転加熱体
の曲面に沿って湾曲しているため、ＳＴＳの適正荷重
（１００〜２００ｇ）で、感熱素子保持体を回転加熱体
に押し当てた際、感熱素子保持体の全面が回転加熱体に
良好に接触するため、正確な温度検知を行うことができ
る。According to this structure, at least one of the heat-sensitive element holding body and the sponge-like elastic body is curved along the curved surface of the rotary heating body. Therefore, with an appropriate load (100 to 200 g) of STS, When the heat-sensitive element holding body is pressed against the rotary heating body, the entire surface of the heat-sensitive element holding body makes good contact with the rotary heating body, so that accurate temperature detection can be performed.
【００１０】[0010]
【実施例】以下、図面を参照して本発明を更に詳しく説
明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings.
【００１１】図１（ａ）は、本発明による温度検知器の
実施例を示す斜視図、同図（ｂ）はその正面図である。
一辺の長さが１０ｍｍ、中央部の厚さが５ｍｍで上面が
湾曲（Ｒ２０ｍｍ）してなる硬度（ＪＩＳ Ａ）１５度
のシリコーンゴムスポンジ（スポンジ状弾性体）２の上
に、一辺が１０ｍｍ、厚さ１ｍｍで前記シリコーンゴム
スポンジ２と略等しい曲率で湾曲（Ｒ２０ｍｍ）してな
る硬度（ＪＩＳ Ａ）８０度の高熱伝導率シリコーンゴ
ム成形体の感熱素子保持体３が形成されている。感熱素
子保持体３の中心部には直径約１ｍｍのサーミスタ４が
一体成形されて埋め込まれている。シリコーンゴムスポ
ンジ２は、裏面に導体パターンが形成されたガラスエポ
キシ系のプリント配線基板５に取り付けられている。FIG. 1A is a perspective view showing an embodiment of a temperature detector according to the present invention, and FIG. 1B is a front view thereof.
On a silicone rubber sponge (sponge-like elastic body) 2 having a hardness (JIS A) of 15 degrees and a side length of 10 mm, a central portion thickness of 5 mm, and a curved upper surface (R20 mm), a side length of 10 mm, A thermosensitive element holder 3 of a high thermal conductivity silicone rubber molded body having a hardness (JIS A) of 80 degrees and having a thickness of 1 mm and being curved (R20 mm) with a curvature substantially equal to that of the silicone rubber sponge 2 is formed. A thermistor 4 having a diameter of about 1 mm is integrally molded and embedded in the central portion of the thermosensitive element holder 3. The silicone rubber sponge 2 is attached to a glass epoxy printed wiring board 5 having a conductor pattern formed on its back surface.
【００１２】感熱素子保持体３の両側面から出ているサ
ーミスタのリード線６は、プリント配線基板５の前部と
後部に設けられている穴７をそれぞれ通って裏面の導体
パターンのランドに半田付けされている。温度検知器の
リード線８は、同様に導体パターンのランドに半田付け
され、サーミスタのリード線６と電気的に接続されてい
る。The thermistor lead wires 6 extending from both sides of the thermosensitive element holder 3 are soldered to the lands of the conductor pattern on the rear surface through the holes 7 provided in the front and rear portions of the printed wiring board 5, respectively. It is attached. Similarly, the lead wire 8 of the temperature detector is soldered to the land of the conductor pattern and electrically connected to the lead wire 6 of the thermistor.
【００１３】厚さ０．０５ｍｍのポリイミドテープ９
は、感熱素子保持体３の上面全体を覆うように、プリン
ト配線基板５の裏面側まで巻き付けられている。高熱伝
導率シリコーンゴム成形体の感熱素子保持体３は、シリ
コーンゴムにアルミナ、シリカ、酸化亜鉛、少量の窒化
ボロン等を配合して高熱伝導率特性を実現しており、通
常の成形と同様に金型でサーミスタ４と一体成形され
る。Polyimide tape 9 having a thickness of 0.05 mm
Is wound up to the back surface side of the printed wiring board 5 so as to cover the entire upper surface of the thermosensitive element holder 3. The heat-sensitive element holder 3 of a high thermal conductivity silicone rubber molded body achieves high thermal conductivity characteristics by blending silicone rubber with alumina, silica, zinc oxide, a small amount of boron nitride, etc. It is integrally molded with the thermistor 4 by a mold.
【００１４】ここで、温度検知器の応答時間を調べるた
めに、本実施例の温度検知器１と図６に示す従来例の温
度検知器１１について、図４（本実施例）及び図５（従
来例）に示すように、２５℃と１５０℃に精密にコント
ロールされた直径２５ｍｍのヒートロール２１、３１
に、１５０ｇの荷重をかけた状態で前記温度間の応答時
間を測定した。Here, in order to check the response time of the temperature detector, the temperature detector 1 of the present embodiment and the temperature detector 11 of the conventional example shown in FIG. 6 are shown in FIGS. As shown in (Conventional example), the heat rolls 21 and 31 with a diameter of 25 mm are precisely controlled at 25 ° C and 150 ° C.
Then, the response time between the temperatures was measured under a load of 150 g.
【００１５】測定の結果は、熱時定数（１００％応答の
６３．２％になるまでの時間）の平均値で表すと、従来
例のものが、５．３ｓｅｃであったのに対し、本実施例
のものは、３．２ｓｅｃであった。このように、本実施
例のものは従来例のものに比べ、シリコーンゴムスポン
ジ及び感熱素子保持体が湾曲しているため、ヒートロー
ルに対し弱い押圧荷重で押し付けても、感熱素子保持体
の表面全体がヒートロールに良好に接触することによ
り、集熱が良好になり応答時間を短縮することができ
る。When the result of the measurement is expressed by the average value of the thermal time constant (time until 63.2% of 100% response), the value of the conventional example was 5.3 seconds, whereas In the example, it was 3.2 sec. As described above, since the silicone rubber sponge and the thermosensitive element holder of this example are curved as compared with those of the conventional example, the surface of the thermosensitive element holder is pressed against the heat roll with a weak pressing load. Good contact with the heat roll as a whole allows good heat collection and shortens the response time.
【００１６】次に、１５０℃に精密にコントロールされ
た直径２５ｍｍのヒートロールに上記２種類の温度検知
器を接触させ、押圧を暫時増加させたときのサーミスタ
の抵抗値を換算して得たヒートロールの温度変化を調べ
てみた。その結果、図３に示すようなグラフが得られ
た。グラフＡは、本実施例によるもの、グラフＢは、従
来例によるものであり、測定値は荷重を変化させて１０
分経過後に測定した値である。Next, a heat roll having a diameter of 25 mm precisely controlled at 150 ° C. was brought into contact with the above-mentioned two types of temperature detectors to convert the resistance value of the thermistor when the pressure was increased for a while to obtain the heat. I checked the temperature change of the roll. As a result, a graph as shown in FIG. 3 was obtained. Graph A is according to the present embodiment, graph B is according to the conventional example, and the measured value is 10 when the load is changed.
It is a value measured after a lapse of minutes.
【００１７】このグラフを見ても明らかなように、従来
例のものは、ＳＴＳの適正荷重である１００〜２００ｇ
で特に温度ズレが生じているが、本実施例によるもの
は、押圧荷重の変化に対してほとんど温度ズレが生じて
おらず、正確な温度検知が可能であることが判る。As is apparent from the graph, the conventional example has an STS proper load of 100 to 200 g.
In particular, there is a temperature shift, but in the case of the present embodiment, there is almost no temperature shift with respect to the change of the pressing load, and it can be seen that accurate temperature detection is possible.
【００１８】本発明は前記実施例に限定されるものでは
ない。まず、前記実施例では、シリコーンゴムスポンジ
（スポンジ状弾性体）及び感熱素子保持体の両方に湾曲
を設けた例を説明したが、例えば、図２に示すように感
熱素子保持体３のみに湾曲を設けても良く、この場合に
も前記実施例と同様の作用を呈することは明らかであ
る。また、図示していないが、スポンジ状弾性体のみに
湾曲を設けることも考えられる。この場合、感熱素子保
持体を回転加熱体に接触させた場合には前記実施例と同
様の作用を呈することになるが、回転加熱体に接触させ
るまでは、感熱素子保持体とスポンジ状弾性体との間に
僅かな間隙が生じることから、この間隙が断熱層として
作用し熱特性の劣化を防ぐことができる。The present invention is not limited to the above embodiment. First, in the above-described embodiment, an example was described in which both the silicone rubber sponge (sponge-like elastic body) and the thermosensitive element holder were provided with curves, but for example, as shown in FIG. 2, only the thermosensitive element holder 3 is curved. May be provided, and in this case also, it is clear that the same operation as in the above-mentioned embodiment is exhibited. Although not shown, it is also possible to provide the sponge-like elastic body only with a curve. In this case, when the heat-sensitive element holder is brought into contact with the rotary heating body, the same effect as in the above-described embodiment is exhibited, but until the heat-sensitive element holder is brought into contact with the rotary heater, the heat-sensitive element holder and the sponge-like elastic body are provided. Since a slight gap is generated between and, the gap acts as a heat insulating layer and can prevent deterioration of thermal characteristics.
【００１９】更に、前記実施例では、感熱素子としてサ
ーミスタを用いた例を説明したが、熱電対等を用いても
良く、また、感熱素子保持体としては、シリコーンゴム
以外にもフッ素樹脂やポリイミド樹脂等の耐熱絶縁性成
形物を用いても良い。Further, although the thermistor is used as the thermosensitive element in the above-mentioned embodiment, a thermocouple or the like may be used, and the thermosensitive element holder may be made of fluorine resin or polyimide resin other than silicone rubber. A heat resistant insulating molded product such as the above may be used.
【００２０】[0020]
【発明の効果】以上説明したように本発明によれば、感
熱素子保持体またはスポンジ状弾性体のうち少なくとも
一方が回転加熱体の曲面に沿って湾曲しているため、温
度検知器を回転加熱体に押し当てた際、感熱素子保持体
の全面を回転加熱体に接触させることができ、良好な集
熱を得ることが可能となった。これにより、応答時間が
著しく改善された信頼性の高い温度検知器を提供するこ
とができる。As described above, according to the present invention, since at least one of the heat-sensitive element holder and the sponge-like elastic member is curved along the curved surface of the rotary heating member, the temperature detector is heated by rotation. When pressed against the body, the entire surface of the thermosensitive element holder can be brought into contact with the rotary heating element, and good heat collection can be obtained. This makes it possible to provide a highly reliable temperature detector with significantly improved response time.
【図１】本発明の実施例を示す図で、（ａ）は温度検知
器の斜視図、同図（ｂ）は正面図である。1A and 1B are views showing an embodiment of the present invention, in which FIG. 1A is a perspective view of a temperature detector, and FIG. 1B is a front view thereof.
【図２】本発明の他の実施例を示す図で、（ａ）は温度
検知器の斜視図、同図（ｂ）は、正面図である。2A and 2B are views showing another embodiment of the present invention, in which FIG. 2A is a perspective view of a temperature detector, and FIG. 2B is a front view thereof.
【図３】本発明及び従来例の温度検知器における押圧変
化に対する検知温度の関係を説明するためのグラフであ
る。FIG. 3 is a graph for explaining the relationship between the detected temperature and the change in pressure in the temperature detectors of the present invention and the conventional example.
【図４】本発明による温度検知器をヒートロールへ押圧
荷重１５０ｇで押し当てた時の状態を示す説明図であ
る。FIG. 4 is an explanatory view showing a state when the temperature detector according to the present invention is pressed against a heat roll with a pressing load of 150 g.
【図５】従来の温度検知器をヒートロールへ押圧荷重１
５０ｇで押し当てた時の状態を示す説明図である。FIG. 5: Pressing load 1 from conventional temperature detector to heat roll
It is explanatory drawing which shows the state when it presses by 50 g.
【図６】従来例を示す図で、（ａ）は温度検知器の斜視
図、同図（ｂ）は正面図である。6A and 6B are views showing a conventional example, in which FIG. 6A is a perspective view of a temperature detector, and FIG. 6B is a front view thereof.
１…温度検知器 ２…シリコーンゴムスポンジ（スポンジ状弾性体） ３…感熱素子保持体 ４…サーミスタ（感熱素子） ５…プリント配線基板 ６…サーミスタのリード線 ７…穴 ８…温度検知器のリード線 ９…ポリイミドテープ DESCRIPTION OF SYMBOLS 1 ... Temperature detector 2 ... Silicone rubber sponge (sponge-like elastic body) 3 ... Thermosensitive element holder 4 ... Thermistor (thermosensitive element) 5 ... Printed circuit board 6 ... Thermistor lead wire 7 ... Hole 8 ... Temperature detector lead Line 9: Polyimide tape
Claims (1)
た成形物の感熱素子保持体と、前記感熱素子保持体を支
持するスポンジ状弾性体と、これらを被包し回転加熱体
に円滑に接する摩擦係数の少ない耐熱絶縁フィルムとか
らなる温度検知器において、前記感熱素子保持体または
前記スポンジ状弾性体のうち少なくとも一方が前記回転
加熱体の形状に沿って略等しい曲面を有していることを
特徴とする温度検知器。1. A heat-sensitive element, a heat-sensitive element holder of a molded article having excellent thermal conductivity and heat resistance, a sponge-like elastic body supporting the heat-sensitive element holder, and a rotary heating body encapsulating these. In a temperature detector consisting of a heat-resistant insulating film having a low friction coefficient that smoothly contacts, at least one of the heat-sensitive element holder and the sponge-like elastic body has a substantially equal curved surface along the shape of the rotary heating body. A temperature detector characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7194227A JP2975552B2 (en) | 1995-07-05 | 1995-07-05 | Temperature detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7194227A JP2975552B2 (en) | 1995-07-05 | 1995-07-05 | Temperature detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0854295A true JPH0854295A (en) | 1996-02-27 |
| JP2975552B2 JP2975552B2 (en) | 1999-11-10 |
Family
ID=16321079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7194227A Expired - Lifetime JP2975552B2 (en) | 1995-07-05 | 1995-07-05 | Temperature detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2975552B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009163039A (en) * | 2008-01-08 | 2009-07-23 | Kyocera Mita Corp | Fixing device and image forming apparatus including the same |
| CN103557954A (en) * | 2013-11-14 | 2014-02-05 | 湖北开特汽车电子电器***股份有限公司 | Temperature sensor for measuring temperature of battery cooling water pipe |
| WO2023230437A1 (en) * | 2022-05-23 | 2023-11-30 | Watlow Electric Manufacturing Company | Compliant temperature sensing system |
-
1995
- 1995-07-05 JP JP7194227A patent/JP2975552B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009163039A (en) * | 2008-01-08 | 2009-07-23 | Kyocera Mita Corp | Fixing device and image forming apparatus including the same |
| CN103557954A (en) * | 2013-11-14 | 2014-02-05 | 湖北开特汽车电子电器***股份有限公司 | Temperature sensor for measuring temperature of battery cooling water pipe |
| WO2023230437A1 (en) * | 2022-05-23 | 2023-11-30 | Watlow Electric Manufacturing Company | Compliant temperature sensing system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2975552B2 (en) | 1999-11-10 |
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