JP2008076934A - Heater, heating device, and image forming apparatus - Google Patents

Heater, heating device, and image forming apparatus Download PDF

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JP2008076934A
JP2008076934A JP2006258470A JP2006258470A JP2008076934A JP 2008076934 A JP2008076934 A JP 2008076934A JP 2006258470 A JP2006258470 A JP 2006258470A JP 2006258470 A JP2006258470 A JP 2006258470A JP 2008076934 A JP2008076934 A JP 2008076934A
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heater
insulating substrate
heating
heating resistor
toner
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Takaaki Karibe
孝明 苅部
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Toshiba Lighting and Technology Corp
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Harison Toshiba Lighting Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain a heater capable of obtaining uniform temperature distribution characteristic and also capable of achieving space saving. <P>SOLUTION: Belt-shaped heating resistors 12 and 13 having a predetermined resistance value are formed by calcining resistive paste at high temperature in parallel in the longitudinal direction of the surface side of a strip-shaped insulating substrate 11 made of high-rigidity base material such as ceramic and having high heat conductivity. A connection part 14 is formed by overlaying one end on the heating resistor 12 and forming the other end on the side surface in the width direction of the insulating substrate 11, and a connection part 15 is formed by overlaying one end on the heating resistor 13 and forming the other end on the side surface in the width direction of the insulating substrate 11, respectively. The connection parts 14 and 15 are formed as if they are bent directly from parts where they are connected to the heating resistors 12 and 13 to the side surface side of the insulating substrate 11. A connection part 16 is formed by overlaying the respective other ends of the heating resistors 12 and 13 on the insulating substrate 11 and forming its other end on the side surface in the width direction of the insulating substrate 11. Power is supplied to the connection parts 14 to 16. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、情報機器、家電製品や製造設備などの小型機器類に装着されて用いられる薄型のヒータおよびこのヒータを実装したプリンタ、複写機やファクシミリなどの加熱装置並びにこの加熱装置を用いた画像形成装置に関する。   The present invention relates to a thin heater used by being mounted on small equipment such as information equipment, home appliances, and manufacturing equipment, a heating device such as a printer, a copying machine, and a facsimile machine equipped with the heater, and an image using the heating device. The present invention relates to a forming apparatus.

従来のトナー定着用に用いる面状ヒータは、発熱抵抗体が形成された絶縁基板を長手方向に延在させて電極を形成し、この電極に電力を供給するためのコネクタを電気的に接続させている。（例えば、特許文献１）
特開２０００−１１３９３１公報 Conventional planar heaters used for toner fixing are formed by extending an insulating substrate on which a heating resistor is formed in the longitudinal direction to form an electrode and electrically connecting a connector for supplying power to the electrode. ing. (For example, Patent Document 1)
JP 2000-113931 A

上記した特許文献１の技術は、電力供給用の電極を形成する領域分だけ絶縁基板の長さを長くする必要があるため材料を多く使う必要があるばかりか、電極を構成する絶縁基板の面積が増加等による温度の逃げが発生し、発熱抵抗体の長手方向の中間部分に対し、両端部分の温度が低くなる問題の他に、ヒータ全体が長くなることによる複写機の実機内の余分なスペースが必要となるという問題があった。   In the technique of the above-mentioned Patent Document 1, it is necessary to increase the length of the insulating substrate by an area for forming an electrode for power supply, so that it is necessary to use a large amount of material, and the area of the insulating substrate constituting the electrode In addition to the problem that the temperature at both ends becomes lower than the longitudinal intermediate portion of the heating resistor due to an increase in temperature, etc., the extra heater in the actual copying machine due to the length of the entire heater becomes longer. There was a problem of needing space.

この発明の目的は、均一な温度分布特性が得られるとともに、省スペース化を図ることができるヒータ、加熱装置および画像形成装置を提供することにある。   An object of the present invention is to provide a heater, a heating device, and an image forming apparatus capable of obtaining uniform temperature distribution characteristics and saving space.

上記した課題を解決するために、この発明のヒータは、耐熱・絶縁性材料で形成される長尺平板状の絶縁基板と、前記絶縁基板の長手方向に形成された発熱抵抗体と、前記発熱抵抗体の延長線上の前記絶縁基板の側面に前記発熱抵抗体と電気的に接続された状態で形成した導電性の接続部と、少なくとも前記発熱抵抗体を覆うように配置された絶縁性のオーバーコート層とを具備したことを特徴とする。   In order to solve the above-described problems, the heater of the present invention includes a long flat insulating substrate formed of a heat-resistant and insulating material, a heating resistor formed in a longitudinal direction of the insulating substrate, and the heat generation. A conductive connecting portion formed in a state of being electrically connected to the heating resistor on a side surface of the insulating substrate on an extension line of the resistor, and an insulating overcoat disposed so as to cover at least the heating resistor; And a coat layer.

この発明によれば、発熱抵抗体の長手方向全域に渡りフラットな発熱量を得ながら、絶縁基板の寸法を短くでき材料費を廉価にできることが可能となる。   According to the present invention, it is possible to reduce the size of the insulating substrate and to reduce the material cost while obtaining a flat amount of heat generation in the entire longitudinal direction of the heating resistor.

以下、この発明を実施するための最良の形態について、図面を参照しながら詳細に説明する。
図１〜図５は、この発明の一実施形態について説明するための、図１は構成図、図２は図１の側面図、図３は図１のａ−ａ’断面図、図４は図１の矢印ｂ方向から見た状態の側面図、図５は図１の矢印ｃ方向から見た状態の側面図である。 Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
1 to 5 are diagrams for explaining an embodiment of the present invention, FIG. 1 is a configuration diagram, FIG. 2 is a side view of FIG. 1, FIG. 3 is a cross-sectional view along aa 'in FIG. 1 is a side view as seen from the direction of arrow b in FIG. 1, and FIG. 5 is a side view as seen from the direction of arrow c in FIG.

図１〜図５において、１１は、耐熱、電気絶縁性材料の例えばアルミナ（Ａｌ２Ｏ３）や窒化アルミニウム（ＡｌＮ）、窒化珪素（Ｓｉ３Ｎ４）などの電気絶縁性を有する高剛性のセラミック等の基材で高い熱伝導性の短冊状の絶縁基板である。１２，１３は、絶縁基板１１の表面側の長手方向に沿って平行に形成された銀（Ａｇ）・パラジウム（Ｐｄ）をはじめとする銀系材料や、ルテニウム系、炭素系等などの抵抗体ペーストを高温で焼成し、膜厚を数μｍ〜十数μｍ程度とすることで所定の抵抗値を有する帯状の発熱抵抗体である。 In FIG. 1 to FIG. 5, reference numeral 11 denotes a heat-resistant, electrically insulating material such as alumina (Al 2 O 3 ), aluminum nitride (AlN), silicon nitride (Si 3 N 4 ), or other highly rigid material having electrical insulation. It is a strip-shaped insulating substrate having a high thermal conductivity and a base material such as ceramic. Reference numerals 12 and 13 denote silver-based materials such as silver (Ag) / palladium (Pd) formed in parallel along the longitudinal direction of the surface side of the insulating substrate 11, and resistors such as ruthenium-based and carbon-based resistors. It is a belt-like heating resistor having a predetermined resistance value by baking the paste at a high temperature and setting the film thickness to about several μm to several tens of μm.

１４は、一端を絶縁基板１１上で発熱抵抗体１２に重層し、他端を絶縁基板１１の短手方向の側面上に銀系の導体ペーストを焼成して形成した接続部である。１５は、一端を絶縁基板１１上で発熱抵抗体１３に重層し、他端を絶縁基板１１の短手方向の側面上に銀系の導体ペーストを焼成して形成した接続部である。絶縁基板１１上の接続部１４，１５は、極力短い長さとする。つまり、接続部１４，１５は発熱抵抗体１２，１３に接続される部分から直ちに絶縁基板１１の側面側に折曲される格好で固着される。   Reference numeral 14 denotes a connection portion formed by stacking one end on the heating resistor 12 on the insulating substrate 11 and firing the silver-based conductor paste on the side surface of the insulating substrate 11 in the short direction. Reference numeral 15 denotes a connecting portion formed by layering one end on the heating resistor 13 on the insulating substrate 11 and firing the silver-based conductor paste on the side surface of the insulating substrate 11 in the short direction. The connecting portions 14 and 15 on the insulating substrate 11 are as short as possible. In other words, the connecting portions 14 and 15 are fixed in such a manner that the connecting portions 14 and 15 are immediately bent from the portion connected to the heating resistors 12 and 13 to the side surface side of the insulating substrate 11.

１６は、発熱抵抗体１２，１３のそれぞれの他端を絶縁基板１１上で重層し、他端を絶縁基板１１の短手方向の側面上に銀系の導体ペーストを焼成して形成した接続部である。絶縁基板１１上の接続部１６は、極力短い長さとする。   16 is a connection part formed by baking the other end of each of the heating resistors 12 and 13 on the insulating substrate 11 and baking the other end on the side surface of the insulating substrate 11 in the short direction. It is. The connecting portion 16 on the insulating substrate 11 is as short as possible.

１７は、発熱抵抗体１２，１３と絶縁基板１１上の接続部１４〜１６を覆い、電気的、機械的、化学的な保護を行うため、ガラスペーストを塗布、焼成して形成される厚膜印刷方法を用い、１０μｍ〜１００μｍ程度の膜厚で形成されたオーバーコート層である。絶縁基板１１の側面に形成される接続部１４〜１６には、オーバーコート層１７が形成されずに接続部１４〜１６の表面は導電性を有し、側面に位置する接続部１４〜１６は、電力を供給させるための電極となる。   17 is a thick film formed by applying and baking a glass paste to cover the heating resistors 12 and 13 and the connecting portions 14 to 16 on the insulating substrate 11, and to provide electrical, mechanical and chemical protection. It is an overcoat layer formed with a film thickness of about 10 μm to 100 μm using a printing method. In the connection portions 14 to 16 formed on the side surfaces of the insulating substrate 11, the overcoat layer 17 is not formed, and the surfaces of the connection portions 14 to 16 have conductivity, and the connection portions 14 to 16 located on the side surfaces are It becomes an electrode for supplying electric power.

図６は、この発明の効果について説明するための説明図である。図６は、図１に示すヒータを１００とし、ヒータ１００の長手方向における各位置の温度分布を従来のヒータと比較したものである。   FIG. 6 is an explanatory diagram for explaining the effect of the present invention. FIG. 6 compares the temperature distribution at each position in the longitudinal direction of the heater 100 with a conventional heater, where the heater shown in FIG.

すなわち、従来のヒータの場合は、図６の発熱抵抗体１２，１３の両端に、電力を供給するための電極を絶縁基板面上にヒータ１００に形成する必要がある。このため、発熱抵抗体１２，１３の両端に一点鎖線で示す長さＬａと長さＬｂの部分が電極形成のため必要で、この部分で発熱抵抗体１２，１３で発生した熱が逃げてしまい、図６の従来として示した温度分布のように、発熱抵抗体１２，１３の両端付近の発熱量が低下する。   That is, in the case of the conventional heater, it is necessary to form electrodes for supplying power on the insulating substrate surface on the heater 100 at both ends of the heating resistors 12 and 13 in FIG. For this reason, the length La and the length Lb shown by the alternate long and short dash lines are necessary at both ends of the heating resistors 12 and 13 for electrode formation, and heat generated in the heating resistors 12 and 13 escapes in these portions. As shown in the conventional temperature distribution of FIG. 6, the amount of heat generated near both ends of the heating resistors 12 and 13 decreases.

これに対し、発熱抵抗体１２，１３の両端に接続したのち直ちに絶縁基板１１の側面に電力供給用の接続部１４〜１６が形成された、この発明の実施形態では、発熱抵抗体１２，１３の両端での熱の逃げを極力抑えることができ、図６の本発明として示した温度分布のように、発熱抵抗体１２，１３の長手方向全域に渡りフラットな発熱量を得ることが可能となる。   On the other hand, in the embodiment of the present invention in which the power supply connecting portions 14 to 16 are formed on the side surfaces of the insulating substrate 11 immediately after connecting to both ends of the heating resistors 12 and 13, the heating resistors 12 and 13 are formed. The heat escape at both ends can be suppressed as much as possible, and a flat heat generation amount can be obtained over the entire longitudinal direction of the heating resistors 12 and 13 as in the temperature distribution shown as the present invention in FIG. Become.

この実施形態では、発熱抵抗体１２，１３の長手方向全域に渡りフラットな発熱量を得ながら、絶縁基板１１の寸法を短くすることができ材料費を廉価にできることが期待できる。   In this embodiment, it is expected that the dimensions of the insulating substrate 11 can be shortened and the material cost can be reduced while obtaining a flat amount of heat generation over the entire longitudinal direction of the heating resistors 12 and 13.

この実施形態では、絶縁基板１１の長手方向の両側面に接続部を形成したが、接続部１６は絶縁基板１１面上で発熱抵抗体１２，１３のそれぞれ一端を電気的に接続する接続導体として構わない。この場合、接続部１４，１５に電力が供給されることになる。   In this embodiment, the connecting portions are formed on both side surfaces of the insulating substrate 11 in the longitudinal direction. However, the connecting portions 16 serve as connecting conductors that electrically connect one ends of the heating resistors 12 and 13 on the insulating substrate 11 surface. I do not care. In this case, electric power is supplied to the connection parts 14 and 15.

図７、図８は、この発明のヒータをトナー定着の加熱装置２００とした場合の実施形態について説明するための模式図、図８は図７の断面図である。   7 and 8 are schematic views for explaining an embodiment in which the heater of the present invention is a toner fixing heating device 200, and FIG. 8 is a cross-sectional view of FIG.

図７において、７１は、支持体７２の底部にヒータ１００を固着させ、ヒータ１００にコネクタ７３１，７３２をリード線７４１，７４２介して電力を供給させ、加熱したヒータ１００のオーバーコート層１７に圧接加熱されながら移動するポリイミド樹脂等の耐熱性のシートをロール状にして循環自在に巻装された円筒の定着フィルムである。７５はその表面に耐熱性弾性材料であるたとえばシリコーンゴム層７６が嵌合してある加圧ローラであり、加圧ローラ７５の回転軸７７１，７７２と対向してヒータ１００が、定着フィルム７１と並置して図示しない基台内に取り付けられている。加圧ローラ７５は、図示しない手段に基づいて定着フィルム７１と相互に圧接させてニップ部を形成するとともに、作動時にはそれぞれを矢印ｄ１，ｄ２の方向に回転させる。   In FIG. 7, reference numeral 71 denotes a heater 100 fixed to the bottom of a support 72, power is supplied to the heater 100 via connectors 731 and 732 via lead wires 741 and 742, and pressure contact is applied to the overcoat layer 17 of the heated heater 100. It is a cylindrical fixing film in which a heat-resistant sheet such as a polyimide resin that moves while being heated is rolled to be circulated. Reference numeral 75 denotes a pressure roller having a heat resistant elastic material, for example, a silicone rubber layer 76, fitted on its surface. The heater 100 faces the fixing film 71 and faces the rotation shafts 771 and 772 of the pressure roller 75. They are mounted side by side in a base (not shown). The pressure roller 75 is brought into pressure contact with the fixing film 71 based on a means (not shown) to form a nip portion, and rotates in the directions of arrows d1 and d2 during operation.

このとき、オーバーコート層１７上に配置された定着フィルム７１面とシリコーンゴム層７６との間で、トナー像Ｔｏ１がまず定着フィルム７１を介して加熱ヒータ１００により加熱溶融され、少なくともその表面部は融点を大きく上回り完全に軟化して溶融する。この後、加圧ローラ７５の用紙排出側では複写用紙Ｐが加熱ヒータ１００から離れ、トナー像Ｔｏ２は自然放熱して再び冷却固化し、定着フィルム７１も複写用紙Ｐから離反される。   At this time, the toner image To1 is first heated and melted by the heater 100 through the fixing film 71 between the surface of the fixing film 71 disposed on the overcoat layer 17 and the silicone rubber layer 76, and at least the surface portion thereof is It greatly exceeds the melting point and completely softens and melts. Thereafter, on the paper discharge side of the pressure roller 75, the copy paper P is separated from the heater 100, the toner image To2 is naturally radiated and cooled and solidified again, and the fixing film 71 is also separated from the copy paper P.

図９〜図１１は、支持体６２にヒータ１００が取り付けられている状態について説明するための、図９は側面図、図１０は図９中の矢印ｅ方向からの側面図、図１１は図９のｆ−ｆ’断面図である。   9 to 11 are views for explaining a state in which the heater 100 is attached to the support body 62, FIG. 9 is a side view, FIG. 10 is a side view from the direction of arrow e in FIG. 9, and FIG. FIG. 9 is a sectional view taken along line ff ′ of FIG.

支持体７２は、定着フィルム７１の支持体７２に対する摺動性を向上させるために複数のフィルムガイド９１が一体形成されている。また、支持体７２の底面にはヒータ１００を嵌合させる凹部９２が形成される。   The support 72 is integrally formed with a plurality of film guides 91 in order to improve the slidability of the fixing film 71 with respect to the support 72. Further, a recess 92 into which the heater 100 is fitted is formed on the bottom surface of the support 72.

次に、図１２〜図１５を参照し、ヒータ１００に電力を供給するコネクタ７３１，７３２について説明する。図１２、図１３は、コネクタ７３１とヒータ１００との接合について、図１４、図１５はコネクタ７３２とヒータ１００との接合について説明するための、図１２はコネクタ７３１の斜視図を、図１３はコネクタ７３１とヒータ１００との接続の関係を示す説明図、図１４はコネクタ７３２の斜視図を、図１５はコネクタ７３２とヒータ１００との接続の関係について示す説明図である。   Next, the connectors 731 and 732 that supply power to the heater 100 will be described with reference to FIGS. FIGS. 12 and 13 illustrate the joining between the connector 731 and the heater 100, FIGS. 14 and 15 illustrate the joining between the connector 732 and the heater 100, FIG. 12 is a perspective view of the connector 731, and FIG. FIG. 14 is a perspective view of the connector 732, and FIG. 15 is an explanatory diagram showing the connection relationship between the connector 732 and the heater 100.

まず、図１２、図１３において、コネクタ７３１は、例えば耐熱性の樹脂で形成されたケース１２１にヒータ１００の幅狭側から挿入可能大きさの接続孔１２２が形成される。接続孔１２２内には弾性を有する導電性の例えばリン青銅の材料で形成された接点１２３，１２４が非接触状態で配置される。接点１２３，１２４がそれぞれ接続孔１２２の内側に押されて変形すると、図１３中の矢印ｇ，ｇ’方向にそれぞれ復元する作用が働く。   First, in FIGS. 12 and 13, the connector 731 is formed with a connection hole 122 of a size that can be inserted from the narrow side of the heater 100 in a case 121 made of, for example, a heat-resistant resin. In the connection hole 122, contacts 123 and 124 formed of an elastic conductive material such as phosphor bronze are disposed in a non-contact state. When the contacts 123 and 124 are respectively pushed and deformed inside the connection hole 122, an action of restoring them in the directions of arrows g and g 'in FIG.

つまり、ヒータ１００の接続部１４，１５が形成された側からコネクタ７３１の接続孔１２２に挿入されると、接続部１４と接点１２３、接続部１５と接点１２４がそれぞれ圧接された状態で電気的に接続され、その状態が維持される。図示しないが、コネクタ７３１とヒータ１００とは、接続部１４と接点１２３、接続部１５と接点１２４が圧接状態を保持する手段を備えている。圧接状態保持手段としては、例えば、ヒータ１００と接続孔１２２の接合の摩擦が接点１２３，１２４の復元力よりも大きく設定することが考えられる。   That is, when inserted into the connection hole 122 of the connector 731 from the side on which the connection portions 14 and 15 of the heater 100 are formed, the connection portion 14 and the contact 123 and the connection portion 15 and the contact 124 are electrically pressed. And the state is maintained. Although not shown, the connector 731 and the heater 100 are provided with means for holding the connecting portion 14 and the contact 123 and the connecting portion 15 and the contact 124 in a pressure contact state. As the pressure contact state holding means, for example, it is conceivable to set the friction of joining of the heater 100 and the connection hole 122 to be larger than the restoring force of the contacts 123 and 124.

次に、図１４、図１５において、コネクタ７３２は、例えば耐熱性の樹脂で形成されたケース１４１にヒータ１００の幅狭側から挿入可能大きさの接続孔１４２が形成される。接続孔１４２内には弾性を有する導電性の例えばリン青銅の材料で形成された接点１４３が配置される。接点１４３が接続孔１４２の内側に押されて変形すると、図１５中の矢印ｇ方向に復元する作用が働く。   Next, in FIG. 14 and FIG. 15, the connector 732 is formed with a connection hole 142 of a size that can be inserted from the narrow side of the heater 100 in a case 141 made of, for example, heat resistant resin. In the connection hole 142, a contact 143 made of a conductive material having elasticity such as phosphor bronze is disposed. When the contact 143 is pushed and deformed inside the connection hole 142, an action of restoring in the direction of the arrow g in FIG. 15 works.

つまり、ヒータ１００の接続部１６が形成された側からコネクタ７３２の接続孔１４２に挿入されると、接続部１６と接点１４３圧接された状態で電気的に接続され、その状態が維持される。図示しないが、コネクタ７３２とヒータ１００は、接続部１６と接点１４３が圧接された状態を保持して支持される関係を備えている。   That is, when inserted into the connection hole 142 of the connector 732 from the side where the connection part 16 of the heater 100 is formed, it is electrically connected to the connection part 16 while being in pressure contact with the connection part 143, and this state is maintained. Although not shown, the connector 732 and the heater 100 have a relationship of being supported while the connection portion 16 and the contact 143 are held in pressure contact with each other.

このようにしてヒータ１００は、コネクタ７３１，７３２からそれぞれリード線７４１，７４２を介して、例えば図１６に示す回路構成から電力の供給を受け、発熱させながら温度調整することができる。   In this way, the heater 100 can be supplied with electric power from, for example, the circuit configuration shown in FIG. 16 via the lead wires 741 and 732 from the connectors 731 and 732, respectively, and can adjust the temperature while generating heat.

上記した実施形態は、接続部１６を接地したが、発熱抵抗体１２，１３を直列接続しても構わない。この場合は、接続部１６を絶縁基板１１上に形成するだけでよく、コネクタ７３２は不要となる。要は、発熱抵抗体を接続部を介して外部と接続する場合に接続部を絶縁基板１１の側面に形成し、これにコネクタの接点を圧接するようにする構成であればよい。   In the above-described embodiment, the connection portion 16 is grounded, but the heating resistors 12 and 13 may be connected in series. In this case, it is only necessary to form the connection portion 16 on the insulating substrate 11, and the connector 732 is not necessary. In short, it is only necessary that the connecting portion is formed on the side surface of the insulating substrate 11 when the heat generating resistor is connected to the outside through the connecting portion, and the contact of the connector is press-contacted thereto.

図１６において、商用電源１６１を温度制御回路１６２の制御端子に接続されたソリッドステートリレー１６３、コネクタ７３１を介してヒータ１００の接続部１４，１５に通電されると、接続された発熱抵抗体１２，１３に電流が流れて発熱する。抵抗発熱体１２，１３の発熱により絶縁基板１１も温度上昇し、この熱は、絶縁基板１１の裏面側に取着された検温素子であるサーミスタ１６４の感温部に伝わり、感温部の抵抗値を変化させる。サーミスタ１６４の抵抗値の変化を、温度制御回路１６２に入力して設定温度にあるか否かを判定する。温度が設定値より低い場合は、ソリッドステートリレー１６３にオン信号を出力し、設定温度より高い場合は、ソリッドステートリレー１６３にオフ信号を出力する。   In FIG. 16, when the commercial power supply 161 is energized to the connection portions 14 and 15 of the heater 100 through the solid state relay 163 and the connector 731 connected to the control terminal of the temperature control circuit 162, the connected heating resistor 12 is connected. , 13 generate heat due to current. The temperature of the insulating substrate 11 also rises due to the heat generated by the resistance heating elements 12 and 13, and this heat is transmitted to the temperature sensing portion of the thermistor 164 that is a temperature measuring element attached to the back surface side of the insulating substrate 11, and the resistance of the temperature sensing portion. Change the value. A change in the resistance value of the thermistor 164 is input to the temperature control circuit 162 to determine whether or not the temperature is at the set temperature. When the temperature is lower than the set value, an ON signal is output to the solid state relay 163, and when the temperature is higher than the set temperature, an OFF signal is output to the solid state relay 163.

このように、抵抗発熱体１２，１３に印加する電力を制御することによって、抵抗発熱体１２，１３の温度調整を行う。   In this manner, the temperature of the resistance heating elements 12 and 13 is adjusted by controlling the power applied to the resistance heating elements 12 and 13.

なお、サーミスタ１６４は、発熱抵抗体１２，１３が形成された反対側の絶縁基板１１面の略中央部にスクリーン印刷等により塗工して具備させたＰｔ膜等の低熱容量の測温抵抗体を形成しても構わない。   The thermistor 164 is a resistance thermometer having a low heat capacity, such as a Pt film, which is applied by screen printing or the like to the substantially central portion of the surface of the insulating substrate 11 on the opposite side where the heating resistors 12 and 13 are formed. May be formed.

ヒータ１００の発熱量は、図６で説明したように、発熱抵抗体１２，１３の長手方向全域に渡ってほぼ均一にすることができることから、所定の発熱量を維持する制御の向上を図ることができる。   As described with reference to FIG. 6, the heat generation amount of the heater 100 can be made substantially uniform over the entire longitudinal direction of the heat generation resistors 12 and 13, so that control for maintaining a predetermined heat generation amount is improved. Can do.

次に、図１７を参照して、この発明の加熱装置２００を搭載した複写機を例とした、この発明の画像形成装置について説明する。図中、加熱装置２００の部分は、上記した説明と同じであり、同一部分には同一の符号を付し、その説明は省略する。   Next, with reference to FIG. 17, an image forming apparatus according to the present invention will be described using a copying machine equipped with the heating device 200 according to the present invention as an example. In the figure, the part of the heating device 200 is the same as described above, and the same reference numerals are given to the same parts, and the description thereof is omitted.

図１７において、３０１は複写機３００の筐体、３０２は筐体３０１の上面に設けられたガラス等の透明部材からなる原稿載置台で、矢印Ｙ方向に往復動作させて原稿Ｐ１を走査する。   In FIG. 17, reference numeral 301 denotes a casing of the copying machine 300, and 302 an original placing table made of a transparent member such as glass provided on the upper surface of the casing 301, which scans the original P <b> 1 by reciprocating in the arrow Y direction.

筐体３０１内の上方向には光照射用のランプと反射鏡とからなる照明装置３０２が設けられており、この照明装置３０２により照射された原稿Ｐ１からの反射光源が短焦点小径結像素子アレイ３０３によって感光ドラム３０４上スリット露光される。なお、この感光ドラム３０４は矢印方向に回転する。   An illuminating device 302 including a light irradiation lamp and a reflecting mirror is provided in the upper direction in the housing 301, and a reflected light source from the document P1 irradiated by the illuminating device 302 is a short focus small diameter imaging element. A slit exposure is performed on the photosensitive drum 304 by the array 303. The photosensitive drum 304 rotates in the direction of the arrow.

また、３０５は帯電器で、例えば酸化亜鉛感光層あるいは有機半導体感光層が被覆された感光ドラム３０４上に一様に帯電を行う。この帯電器３０５により帯電された感光ドラム３０４には、結像素子アレイ３０３によって画像露光が行われた静電画像が形成される。この静電画像は、現像器３０６による加熱で軟化溶融する樹脂等からなるトナーを用いて顕像化される。   Reference numeral 305 denotes a charger that uniformly charges, for example, a photosensitive drum 304 coated with a zinc oxide photosensitive layer or an organic semiconductor photosensitive layer. An electrostatic image subjected to image exposure by the imaging element array 303 is formed on the photosensitive drum 304 charged by the charger 305. This electrostatic image is visualized using toner made of a resin that softens and melts when heated by the developing device 306.

カセット３０７内に収納されている複写用紙Ｐは、給送ローラ３０８と感光ドラム３０４上の画像と同期するタイミングをとって上下方向で圧接して回転される対の搬送ローラ３０９によって、感光ドラム３０４上に送り込まれる。そして、転写放電器３１０によって感光ドラム３０４上に形成されているトナー像は複写用紙Ｐ上に転写される。   The copy paper P stored in the cassette 307 is rotated by a pair of conveying rollers 309 that are rotated in pressure contact with each other in synchronization with the feeding roller 308 and the image on the photosensitive drum 304. Sent to the top. The toner image formed on the photosensitive drum 304 is transferred onto the copy paper P by the transfer discharger 310.

その後、感光ドラム３０４上から離れた用紙Ｐは、搬送ガイド３１１によって加熱装置２００に導かれて加熱定着処理された後に、トレイ３１２内に排出される。なお、トナー像が転写された後、感光ドラム３０４上の残留トナーはクリーナ３１３を用いて除去される。   Thereafter, the paper P that is separated from the photosensitive drum 304 is guided to the heating device 200 by the conveyance guide 311 and subjected to a heat fixing process, and then is discharged into the tray 312. After the toner image is transferred, residual toner on the photosensitive drum 304 is removed using a cleaner 313.

加熱装置２００は複写用紙Ｐの移動方向と直交する方向に、この複写機３００が複写できる最大判用紙の幅（長さ）に合わせた有効長、すなわち最大判用紙の幅（長さ）より長い発熱抵抗体１６を延在させてヒータ１００の加圧ローラ２０１が設けられている。   The heating device 200 is longer in the direction orthogonal to the moving direction of the copy paper P than the effective length corresponding to the width (length) of the maximum size paper that can be copied by the copier 300, that is, longer than the width (length) of the maximum size paper. A pressure roller 201 of the heater 100 is provided by extending the heating resistor 16.

そして、ヒータ１００と加圧ローラ２０１との間を送られる用紙Ｐ上の未定着トナー像Ｔ１は、発熱抵抗体１６の熱を受け溶融して複写用紙Ｐ面上に文字、英数字、記号、図面等の複写像を現出させる。   Then, the unfixed toner image T1 on the paper P sent between the heater 100 and the pressure roller 201 is melted by receiving heat from the heating resistor 16, and characters, alphanumeric characters, symbols, A copy image such as a drawing is displayed.

この実施形態では、ヒータ１００を用いることで長手方向に均一な発熱を得ることができる。また、ヒータ１００を長手方向に短くすることができることから複写機３００の小型化に寄与することが可能となる。   In this embodiment, uniform heat generation in the longitudinal direction can be obtained by using the heater 100. Further, since the heater 100 can be shortened in the longitudinal direction, it is possible to contribute to the miniaturization of the copying machine 300.

加熱ヒータの用途としては、複写機等の画像形成装置の定着用に用いたが、これに限らず、家庭用の電気製品、業務用や実験用の精密機器や化学反応用の機器等に装着して加熱や保温の熱源としても使用できる。   The heater is used for fixing image forming devices such as copiers, but is not limited to this, and is installed in household electrical products, precision instruments for business use and experiments, and chemical reaction equipment. It can also be used as a heat source for heating and heat insulation.

この発明のヒータに関する一実施形態について説明するための構成図。The block diagram for demonstrating one Embodiment regarding the heater of this invention. 図１の側面図。The side view of FIG. 図１のａ−ａ’断面図。FIG. 2 is a cross-sectional view taken along the line a-a ′ in FIG. 1. 図１の矢印ｂ方向から見た側面図。The side view seen from the arrow b direction of FIG. 図１の矢印ｃ方向から見た側面図。The side view seen from the arrow c direction of FIG. この発明のヒータ効果について説明するための説明図。Explanatory drawing for demonstrating the heater effect of this invention. この発明のヒータをトナー定着の加熱装置とした場合の実施形態について説明するための模式図。FIG. 3 is a schematic diagram for explaining an embodiment in which the heater of the present invention is a heating device for toner fixing. 図７の断面図。Sectional drawing of FIG. 図７要部の側面図。7 is a side view of the main part. 図９の矢印ｅ方向から見た側面図。The side view seen from the arrow e direction of FIG. 図９のｆ−ｆ’断面図。F-f 'sectional drawing of FIG. 図７のコネクタ７３１の斜視図。The perspective view of the connector 731 of FIG. 図７のコネクタ７３１とヒータ１００の接続について説明するための説明図。Explanatory drawing for demonstrating the connection of the connector 731 and the heater 100 of FIG. 図７のコネクタ７３２の斜視図。The perspective view of the connector 732 of FIG. 図７のコネクタ７３２とヒータ１００の接続について説明するための説明図。Explanatory drawing for demonstrating the connection of the connector 732 and the heater 100 of FIG. この発明ヒータの温度調整について説明するための説明図。Explanatory drawing for demonstrating temperature adjustment of this invention heater. この発明の画像形成装置に関する一実施形態について説明するための説明図。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram for explaining an embodiment of an image forming apparatus according to the present invention;

符号の説明Explanation of symbols

１１ 絶縁基板
１２，１３ 発熱抵抗体
１４〜１６ 接続部
１７ オーバーコート層
７１ 定着フィルム
７２ 支持体
７３１，７３２ コネクタ
７５ 加圧ローラ
１２１，１４１ ケース
１２２，１４２ 接続孔
１２３，１２４，１４３ 接点
１００ ヒータ
２００ 加熱装置
３００ 複写機 DESCRIPTION OF SYMBOLS 11 Insulating board | substrates 12 and 13 Heating resistors 14-16 Connection part 17 Overcoat layer 71 Fixing film 72 Support body 731,732 Connector 75 Pressure roller 121,141 Case 122,142 Connection hole 123,124,143 Contact 100 Heater 200 Heating device 300 Copying machine

Claims (3)

耐熱・絶縁性材料で形成される長尺平板状の絶縁基板と、
前記絶縁基板の長手方向に形成された発熱抵抗体と、
前記発熱抵抗体の延長線上の前記絶縁基板の側面に前記発熱抵抗体と電気的に接続された状態で形成した導電性の接続部と、
少なくとも前記発熱抵抗体を覆うように配置された絶縁性のオーバーコート層とを具備したことを特徴とするヒータ。 A long flat insulating substrate formed of a heat-resistant and insulating material;
A heating resistor formed in the longitudinal direction of the insulating substrate;
A conductive connecting portion formed in a state of being electrically connected to the heating resistor on a side surface of the insulating substrate on an extension line of the heating resistor;
A heater comprising: an insulating overcoat layer disposed to cover at least the heating resistor. 加熱ローラと、
前記加熱ローラに対向配置された発熱抵抗体が圧接された請求項１に記載のヒータと、
前記ヒータの接続部に圧接状態で接続される接点を備え、該接点を介して前記発熱抵抗体に電力が供給されるコネクタと、
前記ヒータと前記加圧ローラとの間を移動可能に設けられた定着フィルムとを具備したことを特徴とする加熱装置。 A heating roller;
The heater according to claim 1, wherein a heating resistor disposed to face the heating roller is pressed.
A contact that is connected in a pressure contact state to the connection portion of the heater, and a connector that supplies power to the heating resistor through the contact;
A heating device comprising a fixing film movably provided between the heater and the pressure roller. 媒体に形成された静電潜像にトナーを付着させてこのトナーを用紙に転写して所定の画像を形成する形成手段と、
画像が形成された用紙を加圧ローラにより定着フィルムを介して前記定着ヒータに圧接しながら通過させることによって、トナーを定着するようにした請求項５記載の加熱装置とを具備したことを特徴とする画像形成装置。 Forming means for attaching a toner to an electrostatic latent image formed on a medium and transferring the toner to a sheet to form a predetermined image;
6. A heating apparatus according to claim 5, wherein the toner is fixed by passing a sheet on which an image is formed through a fixing film through a fixing film while being pressed against the fixing heater. Image forming apparatus.
JP2006258470A 2006-09-25 2006-09-25 Heater, heating device, and image forming apparatus Abandoned JP2008076934A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020086217A (en) * 2018-11-28 2020-06-04 キヤノン株式会社 Image heating device, image formation device, and connector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1079285A (en) * 1996-09-04 1998-03-24 Canon Inc Heating device
JP2002299016A (en) * 2001-03-30 2002-10-11 Harison Toshiba Lighting Corp Plate heater, fixing device and imaging device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1079285A (en) * 1996-09-04 1998-03-24 Canon Inc Heating device
JP2002299016A (en) * 2001-03-30 2002-10-11 Harison Toshiba Lighting Corp Plate heater, fixing device and imaging device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020086217A (en) * 2018-11-28 2020-06-04 キヤノン株式会社 Image heating device, image formation device, and connector
JP7229735B2 (en) 2018-11-28 2023-02-28 キヤノン株式会社 Image heating device, image forming device and connector

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