JPH0589948A - Ceramic heater - Google Patents

Ceramic heater

Info

Publication number
JPH0589948A
JPH0589948A JP24760891A JP24760891A JPH0589948A JP H0589948 A JPH0589948 A JP H0589948A JP 24760891 A JP24760891 A JP 24760891A JP 24760891 A JP24760891 A JP 24760891A JP H0589948 A JPH0589948 A JP H0589948A
Authority
JP
Japan
Prior art keywords
heater
temperature
temperature sensor
ceramic
ceramic substrate
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.)
Pending
Application number
JP24760891A
Other languages
Japanese (ja)
Inventor
Shigehiro Sato
滋洋 佐藤
Takeshi Ono
剛 小野
Hiroyuki Matsunaga
啓之 松永
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Lighting and Technology Corp
Original Assignee
Toshiba Lighting and Technology Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Lighting and Technology Corp filed Critical Toshiba Lighting and Technology Corp
Priority to JP24760891A priority Critical patent/JPH0589948A/en
Publication of JPH0589948A publication Critical patent/JPH0589948A/en
Pending legal-status Critical Current

Links

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  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Fixing For Electrophotography (AREA)
  • Control Of Resistance Heating (AREA)
  • Resistance Heating (AREA)

Abstract

PURPOSE:To bring a temperature sensor close to a heater to perform temperature control with ease and high accuracy by inserting the temperature sensor into a through hole bored in a ceramic base. CONSTITUTION:A through hole 17 is bored at the center portion of the bottom portion of a ceramic base 12 corresponding to approximately the center portion of a heater 13, and a temperature sensor is inserted into the hole 17 and brought close to the center bottom face of the heater 13 and fixed thereto with an adhesive or the like. In a fixing heater of a copying machine, paper 15 is slid on the sliding surface 14a of a glass film 14 and sent out by a feed roller 16 and heated by the heater 13 via the film 14. The temperature of the heater 13 during this heating is detected by a sensor 18 to control transmission of electricity to the heater 13. Therefore, the temperature of the heater 13 can be directly detected not via the base 12 and temperature control of the heater 13 can easily be performed with high accuracy.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は普通紙複写機(以下PP
Cという)やレーザビームプリンタ(以下LBPとい
う)等の定着用ヒータとして好適なセラミックヒータに
係り、特に、セラミック基板の一面をペーパー等の摺動
面にしたセラミックヒータに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plain paper copying machine (hereinafter referred to as PP
The present invention relates to a ceramic heater suitable as a fixing heater for a laser beam printer (hereinafter referred to as “C”), a laser beam printer (hereinafter referred to as LBP), etc.

【0002】[0002]

【従来の技術】一般に、PPCやLBP等はトナー像を
塗布したペーパーを定着用ヒータにより加熱して、トナ
ー像を加熱溶融することによりトナー像をペーパーに定
着させるが、従来、この種の定着用ヒータとしては図3
と図4に示すセラミックヒータ1がある。
2. Description of the Related Art Generally, in PPC, LBP and the like, a paper coated with a toner image is heated by a fixing heater to heat and melt the toner image to fix the toner image on the paper. Fig.3 for the heater
There is a ceramic heater 1 shown in FIG.

【0003】これはセラミック基板2の図中上面上に、
通電加熱自在のヒータ3を厚膜または薄膜等により設置
し、このヒータ3の全上面上とセラミック基板2の上面
上にガラス被膜4またはテフロン被膜等の電気絶縁被膜
をコーティングしている。
This is on the upper surface of the ceramic substrate 2 in the figure,
The heater 3 which can be electrically heated is installed by a thick film or a thin film, and the entire upper surface of the heater 3 and the upper surface of the ceramic substrate 2 are coated with an electrically insulating film such as a glass film 4 or a Teflon film.

【0004】そして、このガラス被膜4の図中上面上
に、例えばトナー像を塗布したペーパー5を送りローラ
6により送って摺動させ、その摺動の際に、ペーパー5
を加熱してトナー像を加熱溶融することによりトナー像
をペーパー5に定着している。
Then, a paper 5 coated with a toner image, for example, is fed by a feed roller 6 and slid on the upper surface of the glass coating 4 in the figure.
The toner image is fixed on the paper 5 by heating and melting the toner image.

【0005】このヒータ3の温度はセラミック基板2の
図中下面に設けたサーミスタや熱電対等の温度センサ7
により検出し、図示しない温度制御系によりヒータ3の
加熱温度を適宜制御している。
The temperature of the heater 3 is measured by a temperature sensor 7 such as a thermistor or a thermocouple provided on the lower surface of the ceramic substrate 2 in the figure.
The heating temperature of the heater 3 is appropriately controlled by a temperature control system (not shown).

【0006】[0006]

【発明が解決しようとする課題】しかしながら、このよ
うな従来のセラミックヒータ1では温度センサ7をセラ
ミック基板12の下面に接着剤等により固着し、または
図示しないばねにより押し付けて固定しており、Al2
3 等より成るセラミック基板2には熱伝導の時間遅れ
があるために、このセラミックヒータ1を所定温に制御
することが必ずしも容易ではないという課題がある。
However, in such a conventional ceramic heater 1, the temperature sensor 7 is fixed to the lower surface of the ceramic substrate 12 with an adhesive or the like, or is pressed by a spring (not shown) to be fixed. 2
There is a problem that it is not always easy to control the ceramic heater 1 to a predetermined temperature because the ceramic substrate 2 made of O 3 or the like has a time delay in heat conduction.

【0007】そこで、本発明はこのような事情を考慮し
てなされもので、その目的は温度制御を容易かつ高精度
に行なうことができるセラミックヒータを提供すること
にある。
Therefore, the present invention has been made in consideration of such circumstances, and an object thereof is to provide a ceramic heater which can easily and highly accurately control the temperature.

【0008】[0008]

【課題を解決するための手段】本発明は前記課題を解決
するために次のように構成される。
The present invention is configured as follows in order to solve the above-mentioned problems.

【0009】つまり本発明は、ヒータを設けたセラミッ
ク基板の一面およびこのヒータを電気絶縁被膜により被
覆するセラミックヒータにおいて、前記セラミック基板
に挿入孔を穿設し、この挿入孔内に温度センサを挿入し
て前記ヒータに近接したことを特徴とする。
That is, according to the present invention, in one surface of a ceramic substrate provided with a heater and a ceramic heater in which the heater is covered with an electrically insulating coating, an insertion hole is formed in the ceramic substrate, and a temperature sensor is inserted into the insertion hole. And is close to the heater.

【0010】[0010]

【作用】温度センサはセラミック基板の挿入孔に挿入さ
れて、ヒータに近接しているので、セラミック基板に熱
伝導時間の遅れがあっても、この温度センサによりヒー
タの温度をほぼ直接検出することができる。
Since the temperature sensor is inserted into the insertion hole of the ceramic substrate and is close to the heater, the temperature of the heater can be detected almost directly by the temperature sensor even if the heat conduction time of the ceramic substrate is delayed. You can

【0011】また、温度センサがセラミック基板の挿入
孔内に挿入されているので、温度センサは挿入孔のほぼ
全体からもヒータの温度を検出することができる。
Further, since the temperature sensor is inserted into the insertion hole of the ceramic substrate, the temperature sensor can detect the temperature of the heater from almost the entire insertion hole.

【0012】したがって、温度センサはヒータの温度を
正確かつ即時検出できるので、その検出温度に基づいて
ヒータの温度を制御する制御を容易かつ高精度に行なう
ことができる。
Therefore, since the temperature sensor can detect the temperature of the heater accurately and immediately, the control for controlling the temperature of the heater based on the detected temperature can be easily and highly accurately performed.

【0013】[0013]

【実施例】以下、本発明の実施例を図面に基づいて説明
する。
Embodiments of the present invention will be described below with reference to the drawings.

【0014】図1は本発明の一実施例の縦断面図、図2
は図1の一部省略平面図であり、図において、セラミッ
クヒータ11はPPCやLBP等に定着用ヒータとして
組み込まれるものであり、Al2 3 等より成るセラミ
ック基板12の図中下面に、通電加熱自在のヒータ13
を厚膜や薄膜等により設置している。
FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG.
1 is a partially omitted plan view of FIG. 1, in which a ceramic heater 11 is incorporated in a PPC, LBP, or the like as a fixing heater, and on the lower surface of the ceramic substrate 12 made of Al 2 O 3 or the like in the drawing, Heater 13 that can be electrically heated
Is installed with a thick film or a thin film.

【0015】また、セラミック基板12はその図中下面
に、ガラス被膜14やテフロン被膜等の電気絶縁被膜を
ほぼ全面的に被着して、ヒータ13の露出面の全面を電
気的に絶縁して被覆している。
Further, the ceramic substrate 12 has a lower surface in the figure covered with an electric insulating coating such as a glass coating 14 and a Teflon coating almost entirely to electrically insulate the entire exposed surface of the heater 13. It is covered.

【0016】ガラス被膜14はその図中上端を、被加熱
物であるペーパー15を水平方向に摺動せしめる摺動面
14aに形成し、ガラス被膜14の上方の送りローラ1
6によりペーパー15を水平方向の図中矢印方向に送る
ようになっている。
The glass coating 14 has its upper end in the figure formed on a sliding surface 14a on which the paper 15 as the object to be heated is slid horizontally, and the feed roller 1 above the glass coating 14 is formed.
6, the paper 15 is fed in the horizontal direction of the arrow in the figure.

【0017】そして、ヒータ13のほぼ中央部に対応す
るセラミック基板12の底部中央部に、その板厚方向に
貫通する挿入孔17を穿設し、この挿入孔17内に温度
センサ18を挿入して接着剤等により固定し、この温度
センサ18をヒータ13の中央部底面に近接させてい
る。
Then, an insertion hole 17 penetrating in the plate thickness direction is formed at the center of the bottom of the ceramic substrate 12 corresponding to substantially the center of the heater 13, and a temperature sensor 18 is inserted into the insertion hole 17. The temperature sensor 18 is brought close to the bottom surface of the central portion of the heater 13 by fixing with an adhesive or the like.

【0018】温度センサ18は図示しない温度制御系に
接続され、温度センサ18により検出した温度検出値に
基づいて、ヒータ13の通電を制御し、ヒータ温度を所
定値に制御するようになっている。
The temperature sensor 18 is connected to a temperature control system (not shown), and based on the temperature detection value detected by the temperature sensor 18, energization of the heater 13 is controlled to control the heater temperature to a predetermined value. ..

【0019】したがって、ガラス被膜14の摺動面14
a上に、ペーパー15を摺動させて送りローラ16によ
り送り出し、その際に、ペーパー15を、ヒータ13の
発熱によりガラス被膜14を介して加熱する。
Therefore, the sliding surface 14 of the glass coating 14
The paper 15 is slid on the sheet a and is sent out by the feed roller 16. At that time, the paper 15 is heated by the heat generated by the heater 13 through the glass coating film 14.

【0020】これにより、ペーパー15が加熱されてト
ナー像が加熱溶融し、ペーパー15に定着する。
As a result, the paper 15 is heated and the toner image is heated and melted and fixed on the paper 15.

【0021】この加熱時のヒータ13の温度はその直下
で近接する温度センサ18によりほぼ直接的にかつ即時
検出され、その温度検出値に基づいて図示しない温度制
御系によりヒータ13の通電が制御され、そのヒータ温
度が所定値に制御される。
The temperature of the heater 13 at the time of this heating is detected almost directly and immediately by the temperature sensor 18 located immediately below the heater 13, and the energization of the heater 13 is controlled by a temperature control system (not shown) based on the detected temperature value. The heater temperature is controlled to a predetermined value.

【0022】したがって本実施例によれば、温度センサ
18は、セラミック基板12の挿入孔17内に挿入され
て、ヒータ13の底面中央部に近接させているので、こ
のヒータ13の温度をセラミック基板12を介さずに、
ほぼ直接的に検出することができる。
Therefore, according to this embodiment, since the temperature sensor 18 is inserted into the insertion hole 17 of the ceramic substrate 12 and is brought close to the central portion of the bottom surface of the heater 13, the temperature of the heater 13 is set to the ceramic substrate. Without going through 12,
It can be detected almost directly.

【0023】また、温度センサ18は挿入孔17のほぼ
全体からヒータ13の温度を検出することができる。
The temperature sensor 18 can detect the temperature of the heater 13 from almost the entire insertion hole 17.

【0024】したがって、温度センサ18によりヒータ
13の温度を正確かつ即時に検出できるので、その温度
検出値に基づいてヒータ13の温度を制御する制御系に
よる制御を容易かつ高精度に行なうことができる。
Therefore, since the temperature of the heater 13 can be detected accurately and immediately by the temperature sensor 18, the control by the control system for controlling the temperature of the heater 13 based on the detected temperature value can be easily and highly accurately performed. ..

【0025】なお、前記実施例では、挿入孔17を貫通
孔により形成したが、本発明はこれに限定されるもので
はなく、盲孔でもよい。
In the above embodiment, the insertion hole 17 is formed by a through hole, but the present invention is not limited to this and may be a blind hole.

【0026】[0026]

【発明の効果】以上説明したように本発明は、温度セン
サをヒータに近接しているので、ヒータの温度を時間遅
れもなく、即時かつ正確に検出することができる。この
ために、この温度検出値に基づいてヒータの温度を制御
する制御系による制御を容易にかつ高精度に行なうこと
ができる。
As described above, according to the present invention, since the temperature sensor is close to the heater, the temperature of the heater can be detected immediately and accurately without time delay. Therefore, the control by the control system that controls the temperature of the heater based on the detected temperature value can be easily and highly accurately performed.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係るセラミックヒータの一実施例の縦
断面図。
FIG. 1 is a vertical sectional view of an embodiment of a ceramic heater according to the present invention.

【図2】図1の一部省略平面図。FIG. 2 is a partially omitted plan view of FIG.

【図3】従来例の縦断面図。FIG. 3 is a vertical sectional view of a conventional example.

【図4】図3の一部省略平面図。FIG. 4 is a partially omitted plan view of FIG.

【符号の説明】[Explanation of symbols]

11 セラミックヒータ 12 セラミック基板 13 ヒータ 14 ガラス被膜 15 ペーパー 17 挿入孔 18 温度センサ 11 Ceramic Heater 12 Ceramic Substrate 13 Heater 14 Glass Coating 15 Paper 17 Insertion Hole 18 Temperature Sensor

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ヒータを設けたセラミック基板の一面お
よびこのヒータを電気絶縁被膜により被覆するセラミッ
クヒータにおいて、前記セラミック基板に挿入孔を穿設
し、この挿入孔内に温度センサを挿入して前記ヒータに
近接したことを特徴とするセラミックヒータ。
1. A ceramic substrate having a heater and one surface of the ceramic substrate and a ceramic heater covering the heater with an electrically insulating coating. A ceramic heater characterized by being close to the heater.
JP24760891A 1991-09-26 1991-09-26 Ceramic heater Pending JPH0589948A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24760891A JPH0589948A (en) 1991-09-26 1991-09-26 Ceramic heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24760891A JPH0589948A (en) 1991-09-26 1991-09-26 Ceramic heater

Publications (1)

Publication Number Publication Date
JPH0589948A true JPH0589948A (en) 1993-04-09

Family

ID=17166041

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24760891A Pending JPH0589948A (en) 1991-09-26 1991-09-26 Ceramic heater

Country Status (1)

Country Link
JP (1) JPH0589948A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0669771U (en) * 1993-03-11 1994-09-30 株式会社河合楽器製作所 Heating element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0669771U (en) * 1993-03-11 1994-09-30 株式会社河合楽器製作所 Heating element

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