JPH11345680A - Heater, temperature detecting member, heating device and image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance reliability of a contact part of a connector part to a feeder part of a temperature detecting member and an electrode part of a temperature detecting member, to save a space for the connector part and to reduce a cost, in the heater (ceramic heater) and the temperature detecting member, in a heating device using the heater and the temperature detecting member, and in an image forming device equipped with the heating device. SOLUTION: In a heater 601a composed of a heater board of aluminum nitride or the like having a big heat conductivity, and in a heating device having a conductive heater resistance layer on the surface of the board opposite to the pressure contact surface of a pressure member, the contact (b) of a connector 601f is taken in by providing a boring part (a) in a holding member 601c so as to expose the electrode part 11d of the conductive heater resistance layer. Thereby, the electrode part 11d of the conductive heater resistance layer can be brought into contact with the contact (b) without providing a through hole in it, and a danger of seizing or the like caused by partial increase of a resistance value is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a heater, a temperature detecting member, a heating device, and an image forming apparatus.

[0002]

2. Description of the Related Art Conventionally, in an image forming apparatus such as a printer, a copying machine, and a facsimile, a recording material (transfer material, photosensitive paper,
As a heating device (heat fixing device) for thermally fixing an unfixed image formed and carried on a transfer (indirect) method or direct method on electrostatic recording paper, printing paper, etc. Contact heating type devices having good properties are widely known.

In recent years, in recent years, from the viewpoint of promoting energy saving, a method of heating a material to be heated through a film having a small heat capacity has been adopted as a method (on-demand) having a high heat transfer efficiency and a fast start-up of the apparatus. Apparatus (JP-A-63-313182, JP-A-2-15787)
8, 4-44075-44083, 4-20498-
No. 2,049,844) has attracted attention and has been put to practical use.

This film heating type heating device has a heater (heater) and a film (heat transfer member) in which one surface slides with the heater and the other surface comes in contact with the material to be heated and moves together. And having a basic structure of heating a material to be heated by heat from a heater via the film, and a surface of a recording material on which an unfixed image is formed and carried in an image forming apparatus. The image can be used as a heat fixing device for thermally fixing the image as a permanent fixed image.

[0005] Such a film heating type heating device is a thin film film as a heat transfer member or a heat transfer member having a low heat capacity, which is fast in temperature rise, in comparison with other contact heating type heating devices such as a heat roller type. Since the temperature of the heating unit rises to a predetermined value in a short time, it is not necessary to carry out energization heating (preheating) to the heater at the time of standby. The heating element can be sufficiently heated to a predetermined temperature before the heating material reaches the heating section, and power saving and shortening of the wait time (quick start property, on-demand) become possible.
There is an advantage that the temperature rise in the apparatus such as an image forming apparatus can be reduced.

FIG. 17A is a schematic configuration diagram of a main portion of a film heating type heating device (heating fixing device). That is, a heater 11 fixedly supported by a stay holder (holding member) 12, and a heating nip portion having a predetermined nip width (hereinafter, referred to as a fixing film) 13 sandwiched between the heater 11 and the heating nip ( A fixing nip portion (N) is formed and an elastic pressure roller 20 is brought into pressure contact with the roller.

The heater 11 is heated and adjusted to a predetermined temperature by energization.

The fixing film 13 is conveyed and moved in the direction of arrow a while being in close contact with and sliding on the surface of the heater 11 at the fixing nip N by a driving means (not shown) or the rotational force of the pressure roller 20. Or a member in the form of an endless belt or a rolled end web.

The surface of the heater 11 and the stay holder 1
2 is coated with silicone grease, and the fixing film 13
And the slidability is improved.

The heater 11 is heated and controlled to a predetermined temperature, and the fixing film 13 is conveyed and moved in the direction of arrow a. When a recording material P on which an unfixed toner image t as a material to be heated is formed and supported is introduced, the recording material P
Is in close contact with the surface of the fixing film 13 and
Together with the fixing nip N.

In the fixing nip N, the recording material P
The toner image t is heated by the heater 11 via the fixing film 13 and the toner image t on the recording material P is heated and fixed.

The recording material passing through the fixing nip N is peeled off from the surface of the fixing film 13 and conveyed.

As the heater 11, a ceramic heater is generally used. FIG. 17B is a partially cutaway plan model view of the front side (heating surface side) of one example of the ceramic heater 11, and FIG. 17B is a plan view model view of the back side (anti-heating side).

That is, for example, an electrical insulating property such as alumina
A heat-generating resistance layer 11b such as silver palladium (Ag / Pb) / Ta ₂ N is provided on the surface side (the surface facing the fixing film 13) of the ceramic substrate 11a having good heat conductivity and low heat capacity along the length of the substrate. Formed by screen printing etc.
Further, the surface on which the current-generating heating resistor layer is to be formed is thin-glass protective layer 11.
c. In the ceramic heater 11, when power is supplied from the power supply electrode portion 11 d, the power-generating resistance layer 11 b generates heat, and the entire heater rapidly rises in temperature.

The temperature rise of the heater 11 is detected by a temperature detecting means 14 arranged on the back of the heater, and the power supply control (not shown) is performed via an electric circuit pattern 11e, a through hole 11f, and a temperature control section output electrode section 11g. Feedback to the department.

The power supply control section controls the power supply to the power supply heat generating resistance layer 11b so that the heater temperature detected by the temperature detecting means 14 is maintained at a predetermined substantially constant temperature (fixing temperature). That is, the heater 11 is heated and adjusted to a predetermined fixing temperature.

The thickness of the fixing film 13 is considerably reduced to 20 to 70 μm in order to efficiently apply the heat of the heater 11 to the recording material P as a material to be heated in the fixing nip portion N. The fixing film 13 has a three-layer structure including a film base layer, a primer layer, and a release layer. The film base layer side is the heater 11 side, and the release layer side is the pressure roller 20 side. Film base layer is heater 1
A polyimide having a higher insulating property than the glass protective layer 11c,
Polyamide imide, PEEK, etc., having heat resistance and high elasticity. Further, the mechanical strength such as the tear strength of the entire fixing film 13 is maintained by the film base layer. The primer layer is formed as a thin layer having a thickness of about 2 to 6 μm. The release layer is a toner offset prevention layer for the fixing film 13, and is formed by coating a fluororesin such as PFA, PTFE, FEP or the like to a thickness of about 10 μm.

The stay holder 12 is formed of, for example, a heat-resistant plastic member, and holds the heater 11 and also serves as a conveyance guide for the fixing film 13.

In such a heating apparatus of the film heating type using the thin film 13 for fixing, the pressing roller 20 having an elastic layer due to the high rigidity of the ceramic heater 11 applies the film 13 to the film 13. Following the flat lower surface of the heater 11 brought into pressure contact with the heater, the flattened portion is formed at the pressure contact portion to form a fixing nip portion N having a predetermined width, and only the fixing nip portion N is heated, thereby realizing the heat fixing of the quick start. doing.

[0020]

However, the conventional example has the following problems.

In the above-mentioned conventional example, the width (effective heating length area) of the heating nip portion N through which the recording material of the heating device passes is determined so that a letter-size recording material can be fed vertically. However, when fixing an image by passing a recording material (B5 size, A5 size, postcard, envelope, etc.) that is considerably narrower than the width of the letter size, the heating nip portion where the recording material does not pass (non- The temperature rise (the temperature rise phenomenon in the non-sheet passing portion) of the sheet passing region) becomes more intense as printing is continuously performed, and when an alumina substrate is used as the substrate of the heater 11, the substrate is subjected to thermal stress. Problems such as breakage, melting of the stay holder 12 made of a resin material holding the heater, and breakage of the rubber portion of the pressure roller 20 are caused.

Therefore, in order to solve the above-mentioned problem, heating using a ceramic material having a higher thermal conductivity than alumina, such as aluminum nitride (AlN: the thermal conductivity is 5 to 10 times that of alumina), is used as a heater substrate. Means for improving the heat conduction in the longitudinal direction of the heater by using a heater to improve the throughput of narrow recording paper have been considered.

In this case, FIG. 18A, FIG.
As shown in (c), when the thermal conductivity of the heater substrate is larger than the thermal conductivity of the glass of the conventional example, the current-carrying resistance layer 11
The heat generation efficiency is improved by providing b on the back surface side (anti-heating surface side) of the heater substrate 11a (backside heating type AlN heater). The energizing electrode portion 11d is the heater substrate 1.
1a is provided on the front surface side (heating surface side) of the heat-generating electrode layer 11b through the through-hole 11h and the electric circuit pattern 11i on the back side of the heater substrate.
Is energized.

However, the above configuration has the following problems. Since the heat-generating resistance layer 11b is provided on the back surface of the substrate 11a, in the type in which the temperature detecting means 14 is mounted on the substrate 11a, the width of the substrate 11a becomes large, and the stay holder 12 and the film 13 become large. become.

When the temperature detecting means 14 is of an external type, the members 15 and 1 press the temperature detecting means 14 (thermistor) against the heater 11 as shown in FIG.
617 etc. are added, and another connector (not shown)
Is required, and assembling costs and parts costs are incurred.

Further, the energized heating resistor layer 11b is formed on the substrate 11a.
In the case where the conventional power supply connector 18 is used as shown in FIGS. 19A and 19B,
As shown in FIGS. 16 (b) and (c), it is necessary to bring the power supply electrode portion 11d to the front surface side of the heater by the through hole 11h. Therefore, there is a problem such as printing.

FIG. 19A is a bottom view of the stay holder 12 to which the backside heating type AlN heater 11 is attached, and FIG.
FIG. 3 is an enlarged sectional view taken along line bb in FIG. Reference numerals 19 denote flange members fitted to both end sides of the stay holder 12, and regulate the shift movement of the cylindrical film 13 fitted outside the stay holder 12 during rotation.

The present invention provides a heater of this type, a temperature detecting member, a heating device using the heater and the temperature detecting member,
For an image forming apparatus provided with the heating device, the reliability of the contact portion of the connector portion with respect to the power supply portion of the heater and the electrode portion of the temperature detecting member is improved, the space of the connector portion is reduced, and the cost is reduced. With the goal.

[0029]

SUMMARY OF THE INVENTION The present invention provides a heater, a temperature detecting member, a heating device, and an image forming apparatus having the following constitutions.

(1) A flat substrate, an energizing heating resistor layer formed on a surface of the substrate and generating heat by energization, and an electrode portion for energizing the energizing heating resistor layer, In the heater for heating the heating material, the energization heating resistance layer is formed on the substrate surface opposite to the surface side on which the material to be heated is heated, and the electrode portion is also on the same surface as the energization heating resistance layer. A heater characterized in that there is a heater.

(2) The heater according to (1), wherein the substrate of the heater is a ceramic substrate of aluminum nitride.

(3) A heater for heating a material to be heated, which has a flat substrate and a current-carrying resistance layer formed on a surface of the substrate and configured to generate heat by energization. A heater having a temperature detecting member on a substrate surface opposite to a surface to be heated, wherein an electrode portion of the temperature detecting member is provided on the same surface as the temperature detecting member.

(4) The heater according to (3), wherein the substrate of the heater comprises a ceramic substrate of aluminum nitride.

(5) A heater for heating a material to be heated, which has a flat substrate and a current-generating resistance layer formed on the surface of the substrate and generating heat by current application. A temperature detecting member is provided on the substrate surface opposite to the surface side to be formed, one of the electrode portions of the temperature detecting member is provided on the same surface as the temperature detecting member, and the other electrode portion is formed by a through hole. A heater provided on a substrate on a surface side for heating a material to be heated.

(6) The heater according to (5), wherein the substrate of the heater comprises a ceramic substrate of aluminum nitride.

(7) A temperature detecting member comprising a temperature detecting element and a conductive portion for transmitting a signal from the temperature detecting element, wherein the conductive portion is covered with an insulating film, and an end portion is formed from the insulating film to the conductive portion. A temperature detecting member, which is exposed to form an electrode portion.

(8) The temperature detecting member according to (7), wherein the temperature detecting element is provided on an insulating material such as a thermoplastic polyimide film.

(9) A heating device comprising the heater according to any one of (1) to (6).

(10) A heater, and a temperature detecting member for detecting the temperature of the heater, wherein the temperature detecting member is the temperature detecting member according to (7) or (8). Heating equipment.

(11) A heater composed of a flat substrate, a film, a holding member for holding the heater and guiding the inner surface of the film, and supplying power from a power supply unit to the heater. A contact member, a heating member including a housing member that holds the contact portion, and a pressing member that forms a heating nip by pressing the heater of the heating member and a film across the film. In a heating device in which the material to be heated is nipped and conveyed, and the material to be heated is heated by heat from the heater through the film,
The housing member is held at a predetermined position on the holding member, and the heater forms an energized heat generating resistance layer that generates heat by energization on a surface of the substrate opposite to a surface of the pressing member that is pressed against the heating member. Wherein the holding member is provided with a perforated portion so that an electrode portion to the energized heat generating resistance layer of the heater is exposed, and a contact member of the housing member is in contact with the holding member. apparatus.

(12) The heater is made of a ceramic substrate of aluminum nitride. (11)
A heating device according to claim 1.

(13) The housing member according to (11) or (12), wherein the housing member has, in addition to the contact member, biasing means for pressing the heater from the back surface of the electrode portion. Heating equipment.

(14) A heater comprising a flat substrate, a film, a holding member for holding the heater and guiding the inner surface of the film, a temperature detecting member for detecting the temperature of the heater, A first housing member for holding a contact member for supplying power from a power supply unit to the heater, and a second housing for holding a contact member for transmitting a signal from the temperature detection member to a control unit A heating member formed of a member, and a pressure member that presses the heater of the heating member with the heater therebetween to form a heating nip. In the heating device for heating the material to be heated by the heat from the heated heater, the first and second housing members are fixed to predetermined positions of the holding member, and Detection member abuts on the heater, the temperature electrodes of the sensing member is fixed to the holding member, a heating apparatus characterized by being connected with the contact member of the second housing member.

(15) The heater is made of an aluminum nitride ceramic substrate (14).
A heating device according to claim 1.

(16) The heating heater is characterized in that an energized heat-generating resistance layer that generates heat by energization is formed on a surface of the substrate opposite to the surface of the pressing member against which the pressing member is pressed. Or the heating device according to (15).

(17) The heating device according to any one of (14) to (16), wherein the electrode portion of the temperature detecting member is fixed to the holding member with a double-sided tape made of polyimide.

(18) A heater comprising a flat substrate, a film, a holding member for holding the heater and guiding the inner surface of the film, a temperature detecting member for detecting the temperature of the heater, A first housing member for holding a contact member for supplying power from a power supply unit to the heater, and a second housing for holding a contact member for transmitting a signal from the temperature detection member to a control unit A heating member formed of a member, and a pressure member that presses the heater of the heating member with the heater therebetween to form a heating nip. In the heating device for heating the material to be heated by the heat from the heated heater, the first and second housing members are held at predetermined positions of the holding member, and the temperature detection is performed. Member abuts against the heater,
Whether the first electrode portion of the temperature detecting member is fixed to a holding member, or the second electrode portion is fixed at a position facing the first electrode portion and the holding member, and A heating device connected by a contact member of a second housing member.

(19) The heater is made of an aluminum nitride ceramic substrate (18).
A heating device according to claim 1.

(20) The heating heater is characterized in that an energized heat generating resistance layer which generates heat by energization is formed on a surface of the substrate opposite to the surface of the pressing member against which the pressing member is pressed. (18) Or the heating device according to (19).

(21) A connector member having a contact member for supplying power from a power supply unit to the heater and a contact member for transmitting a signal from the temperature detecting member to a control unit in the same housing. Characterized by having (18)
The heating device according to any one of (1) to (20).

(22) The first electrode portion and the second electrode portion of the temperature detecting member are fixed to a holding member or a heater with a double-sided tape made of polyimide. The heating device according to any one of (1) to (4).

(23) A heater comprising a flat substrate, a film, a temperature detecting member for detecting the temperature of the heater, a holding member for holding the heater and guiding the inner surface of the film, A first housing member having a contact member for supplying electric power from a power supply unit to the heater, and a second housing member having a contact member for transmitting a signal from the temperature detection member to a control unit; And a pressurizing member for forming a heating nip by pressing the heater of the heating member and the heater with the film interposed therebetween, and the material to be heated is nipped and conveyed by the heating nip, and heated via the film. In a heating device for heating a material to be heated by heat from a heater, the first and second housing members are held at predetermined positions of the holding member, and the heating member The data are provided said temperature detecting member to the opposite surface to the surface that is pressed against the pressure member,
A heating device, wherein a perforated portion is provided on the holding member so that an electrode portion to the temperature detecting member is exposed, and a contact member of the second housing member is in contact with the perforated portion.

(24) The heater is made of an aluminum nitride ceramic substrate (23).
A heating device according to claim 1.

(25) A heater comprising a flat substrate, a film, a temperature detecting member for detecting the temperature of the heater, a holding member for holding the heater and guiding the inner surface of the film, A first housing member having a contact member for supplying electric power from a power supply unit to the heater, and a second housing member having a contact member for transmitting a signal from the temperature detection member to a control unit; And a pressurizing member for forming a heating nip by pressing the heater of the heating member and the heater with the film interposed therebetween, and the material to be heated is nipped and conveyed by the heating nip, and heated via the film. In a heating device for heating a material to be heated by heat from a heater, the first and second housing members are held at predetermined positions of the holding member, and the heating member The data are provided said temperature detecting member to the opposite surface to the surface that is pressed against the pressure member,
The first electrode portion of the temperature detecting member is provided on a surface of the pressing member that is pressed by a through hole, and the holding member is opposite to a surface of the pressing member that is pressed against the temperature detecting member. A perforated portion is provided so that the second electrode portion on the side of the surface is exposed, and both the first electrode portion and the second electrode portion are in contact with the contact member of the second housing member. A heating device, characterized in that:

(26) The heater is made of an aluminum nitride ceramic substrate (25).
A heating device according to claim 1.

(27) A heater comprising a flat substrate, a film, a holding member for holding the heater and guiding the inner surface of the film, a temperature detecting member for detecting the temperature of the heater, A first housing member having a contact member for supplying electric power from a power supply unit to the heater, and a second housing member having a contact member for transmitting a signal from the temperature detection member to a control unit; And a pressurizing member for forming a heating nip by pressing the heater of the heating member and the heater with the film interposed therebetween, and the material to be heated is nipped and conveyed by the heating nip, and heated via the film. In a heating device for heating a material to be heated by heat from a heater, the first and second housing members are held at predetermined positions of the holding member, and the heating member The heater has an energized heat-generating resistance layer formed on the surface of the substrate opposite to the surface of the pressing member that is in pressure contact, and the temperature detection means is applied to the energized heat-generating resistance layer. A heating device, which is fixed via two types of insulators from the side opposite to the surface of the pressure member against which the pressure member is pressed, and at least one of the two types of insulators is a thermoplastic insulating film. .

(28) The material to be heated is a recording material carrying an image, the recording material is nipped and conveyed by the heating nip, and the image on the recording material is heated by the heat from the heater through the film. The heating device according to any one of (11) to (27), which is an image heating device for heating or a heat fixing device for fixing an unfixed image as a permanent image.

(29) An image heating device for heating an image on a recording material or a heating and fixing device for fixing an unfixed image as a permanent image, using the heating device according to any one of (11) to (27). An image forming apparatus comprising:

<Operation> a) A heater composed of a heater substrate having a high thermal conductivity, such as aluminum nitride, having a heat-generating resistance layer on the surface of the substrate opposite to the surface of the pressing member against which the member is pressed. In the heating device, by providing a contact hole of the connector by providing a perforated portion so that the electrode portion of the energized heating resistance layer is exposed on the holding member,
The contact portion can be brought into contact with the contact member without providing a through hole in the electrode portion of the current-carrying resistance layer, and there is no risk of burning due to a local increase in resistance value.

In addition, in the heat fixing device, the reliability of the contact portion of the connector is not affected by the influence of water vapor generated from the recording material at the time of fixing, paper powder, grease applied to the surface of the heater, and the like. Increase.

Therefore, it is possible to improve the throughput when printing a recording material having a narrow feature width and reduce the thermal stress when using a heater composed of a heater substrate having a high thermal conductivity such as aluminum nitride.

B) Further, by providing the urging means for pressing the heater from the back side of the electrode portion, it is not necessary to bond the heater to the holding member, thereby reducing the cost.

C) In addition, by fixing the electrode portion of the temperature detecting member externally attached to the heater to the holding member with a double-sided tape made of polyimide, it is possible to easily make contact with the connector.

D) Further, by fixing the temperature detecting member with a thermoplastic insulating film via an insulator from the side opposite to the surface of the pressing member against which the pressing member is pressed, the temperature detecting member can be easily provided on the heater. The electrode part of the temperature detection member can be extended to the opposite heater surface with one of the electrode parts as the holding member and the other electrode with the heater interposed, and a polyimide double-sided tape etc. By fixing the temperature detecting member, the contact of the temperature detecting member can be easily obtained, and the space for the connector of the temperature detecting member can be reduced.

E) In the type in which the temperature detecting member is provided on the heater substrate, a hole is formed in the holding member so that the electrode portion of the temperature detecting member of the heater is exposed, and the contact point of the connector is taken. There is no need to provide a through hole for the electrode of the detection member, and the cost is reduced.

Further, similarly to the electrode portion of the current-carrying resistance layer,
Reliability is improved without being affected by water vapor, paper dust, grease applied to the surface of the heater, and the like.

[0067]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment (FIGS. 1 to 4) (1) Example of Image Forming Apparatus FIG. 1 is a schematic configuration diagram of an example of an image forming apparatus. The image forming apparatus of this embodiment is a laser beam printer capable of performing both-side printing using a transfer type electrophotographic process.

A paper feed cassette 2 is provided at the lower part of the printer body 1.
Are mounted, and the recording material P (transfer material, sheet material) P is loaded on the sheet loading plate 201. The pick-up roll 202 is driven by a main motor (not shown) to rotate in the direction of arrow A, thereby conveying the recording material P to a pair of feed rolls 203 composed of a feed roll 203a and a retard roll 203b. After separating the recording material P one by one, the recording material P is fed to a first transport roll pair 301 including a first transport roll 301a and a roller 301b.

The recording material P conveyed to the first conveying roll pair 301 is transported by a second conveying roller 302a and a roller 302
The transfer roller 302 is transported to a second transport roll pair 302 made of b, and further transported to a transfer section which is a press-contact nip portion between a rotating drum type photoconductor (transfer photoconductor) 401 and a transfer roll 402.

The photoreceptor 401 is contained in a process cartridge 4 detachable from the printer main body 1 together with a charger, a developing device, a cleaning device, and the like.

Reference numeral 5 denotes a laser scanner which outputs a laser beam modulated in accordance with an image signal processed by a controller (not shown), and scans and exposes a photosensitive member 401 in the process cartridge 4 to form an electrostatic image. Write the latent image. The electrostatic latent image is developed as a toner image, and the unfixed toner image is transferred to a recording material P surface at a transfer portion. The recording material P to which the unfixed toner image has been transferred is introduced into a heat fixing device (fixing device) 6 as a heating device via a transfer guide 403, and undergoes a heat fixing process of the image.

The recording material P on which the image has been fixed by the heat fixing device 6 is held in a first switching position, a first discharge roller pair 603 comprising a first discharge roller 603a and a discharge roller 603b. The sheet is guided upward through a path on the upper surface side of the flapper 605, and the second sheet discharging roll 701a and the roller 701 are
b, and is conveyed to a second paper discharge roll pair 701, and is discharged and stacked on a face-down tray 702.

In the case of the double-sided printing mode, the recording material P having been printed on the first side and exiting from the heat fixing device 6 passes through the lower surface of the flapper 605 held in the second switching position, and is turned over by the reversing re-conveying unit. 8, a switchback roll pair 801 including a switchback roll 801a and a roller 801b, and a reverse process by a switchback path 807, and a first re-conveyance roll 803a and a roller 803.
b, a first re-conveying roll pair 803 comprising a second re-conveying roll pair 804, a second re-conveying roll pair 804 comprising a second re-conveying roll 804a and a roller 804b. The toner image is conveyed to the transfer unit again through the path of the pair 302 and receives the transfer of the toner image on the second surface.

Thereafter, the face-down tray passes through the path of the heat fixing device 6, the first pair of discharge rolls 603, the upper surface of the flapper 605 held in the first switching position, and the second pair of discharge rolls 701. 702 is stacked.

(2) Heat Fixing Apparatus 6 FIG. 2 is an enlarged model diagram of the heat fixing apparatus 6 part. The heat fixing device of the present example is disclosed in Japanese Patent Application Laid-Open Nos. 4-44075-44083.
Publication No. JP-A-2005-64103 and the like, a film heating system, a pressure roller drive system, and a tensionless type heating device using a cylindrical fixing film.

Reference numerals 601 and 602 denote a heating member (fixing member, heater unit) and a pressurizing member which are in contact with each other to form a heating nip portion (fixing nip portion) N.

The heating member 601 includes a ceramic heater 601a as a heater, and a cylindrical fixing film 601.
b, a film guide 601c as a holding member for holding the ceramic heater 601a and guiding the inner surface of the fixing film 601b, a stay member 601d, and a flange member 60
1e (FIG. 4).

The pressing member 602 is an elastic pressing roller.
A configuration including a cored bar, a silicone rubber elastic layer provided on the outer side thereof, a PFA sheet tubing layer on the outer peripheral surface thereof, and the like, minimizes toner adhesion when fixing an unfixed toner image.

In the heating member 601, the fixing film 6
In this example, reference numeral 01b denotes a polyimide layer coated with fluorine.

The film guide 601c is a member that holds the ceramic heater 601a and prevents heat radiation in the direction opposite to the heating nip N, and is made of a liquid crystal polymer, phenol resin, PPS, PEEK, or the like. The film guide 601c of this example is a member having a substantially semicircular trough-shaped cross section, heat resistance, electrical insulation, and withstands a high load. The ceramic heater 601a is provided at a substantially central portion of the lower surface of the film guide 601c. The heating surface is exposed downward into a groove provided along the length of the member, and is fitted and fixedly supported.

The cylindrical fixing film 601b is loosely fitted to the film guide 601c including the ceramic heater 601a with a margin in the circumferential length.
The film guide 601c supports the fixing film 601b fitted on the outside from the inside.

The pressing roller 602 is held by a bearing member (not shown), and the fixing film 601b is sandwiched between a downwardly facing heating surface of the ceramic heater 601a fixedly supported on the lower surface side of the film guide 601c. Pressure is applied (for example, a total pressure of about 4 to 15 kgf) from both ends in the longitudinal direction to form a heating nip portion N required for heat fixing by a pressing means.

The driving force from a main motor (not shown) in the printer main body 1 is transmitted to the pressing roller gear, and the pressing roller 602 is rotated in the counterclockwise direction indicated by the arrow (pressing roller driving type). ).

A rotational force acts on the fixing film 601b by the frictional contact between the outer surface of the fixing film 601b and the outer surface of the fixing film 601b due to the rotational driving of the pressure roller 602.
The inner surface of the film guide 601c is rotated clockwise in a circumferential direction substantially corresponding to the rotational peripheral speed of the pressure roller 602 while the inner surface thereof is in close contact with the downward heating surface of the ceramic heater 601a in the heating nip portion N while sliding. State.

In this case, the cylindrical fixing film 601b, which is driven to rotate around the outer periphery of the film guide 601c, is tension-free (except for the tension applied to the fixing film portion other than the peripheral portion of the heating nip portion N and the fixing film portion in the vicinity thereof). Not in the state). In addition, a film guide 6 generated with the rotation of the fixing film 601b is formed.
01c is the film guide 601c
The end of the fixing film 601b is received and regulated by the inner surface of the flange member 601e (FIG. 4) provided at the end of the fixing member 601e.

Since the inner surface of the fixing film 601b rotates while rubbing against the outer surfaces of the ceramic heater 601a and the film guide 601c, the frictional resistance between the ceramic heater 601a and the film guide 601c and the fixing film 601b is reduced. There is a need. Therefore, a small amount of lubricant such as heat-resistant grease can be interposed on the surfaces of the ceramic heater 601a and the film guide 601c. Thereby, the fixing film 6
01b can rotate smoothly.

Then, the pressure roller 602 is driven to rotate, and accordingly, the cylindrical fixing film 601b is driven to rotate around the film guide 601c, and the ceramic heater 601a is energized to be driven. In a state where the temperature of the heating nip N rises to a predetermined level due to the heat generated by
The recording material P on which an unfixed toner image is formed and carried is introduced from the entrance guide 610, and the unfixed toner image carrying surface of the recording material P is fixed to the fixing film 60 in the heating nip portion N.
The heating nip N is conveyed together with the fixing film 601b in close contact with the outer surface of the heating nip 1b.

In the process of nipping and transporting the recording material P, the heat of the ceramic heater 601a is applied to the recording material P via the fixing film 601b, and the unfixed toner image on the recording material P is heated and pressed to be fixed. go.

When the recording material P passes through the heating nip N, the recording material P is separated from the outer surface of the fixing film 601b by a curvature, and
08, the sheet is discharged and conveyed from the apparatus 6 along the path of the first sheet discharge roller pair 603. Reference numeral 612 denotes a guide facing the flapper 605.

As shown in FIG. 3, the ceramic heater 601a is similar to the heater 11 of FIG.
This is a backside heating type ALN heater using aluminum nitride having good thermal conductivity as a, in which a current-carrying resistance layer 11b is formed on the backside (non-heating side) of the substrate 11a and coated with a glass layer 11c. It has become. However, in the case of the present example, the power supply electrode portion 11d for the energized heating resistor layer 11b is also provided on the back surface of the substrate 11a.
Since the thermal conductivity of aluminum nitride is better than the thermal conductivity of glass, the ceramic heater 601a is connected to the heater substrate 11a.
The film guide 601c is disposed such that the surface on which the current-carrying resistance layer 11b is not formed is the heating surface side and is the side pressed by the pressure roller 602.

FIGS. 4 (a) and 4 (b) show how to make contact with the power supply connector (first housing member 601f holding the contact member) 601f of the power supply electrode portion 11d of the ceramic heater 601a. It is. 2A is a cutaway top view of a main part of the heater unit of the apparatus 6 viewed from the FF direction in FIG. 2 (the fixing film is omitted), and FIG.
It is an expanded sectional view of power supply connector 601f part seen from -G.

At the end of the film guide 601c, two holes a are formed so that the power supply electrode 11d on the back side of the ceramic heater 601a is exposed, and the power supply connector 601f is connected to the end of the film guide 601c. Is mounted at a predetermined position of the power supply connector 601f and the power supply electrode portion 1 on the ceramic heater 601a side.
1d is in contact as shown in FIG.

The power supply connector 601f is provided from the back side of the power supply electrode 11d of the ceramic heater 601a.
The ceramic heater 601a is prevented from escaping by being pressed by the contact portion by being pressed by the heater pressing spring portion c provided in the above, eliminating the need to adhere the ceramic heater 601a to the film guide 601c. I have.

Thus, the power supply connector 601f is held at a predetermined position of the film guide (holding member) 601c, and the heater 601a using the heater substrate 11a having a high thermal conductivity such as aluminum nitride is used as the pressing member 6a.
On the surface of the heater substrate opposite to the surface of the heater substrate 602, an energized heat generating resistance layer 11b for generating heat by energization is formed. Is provided so that the contact portion b of the power supply connector 601f contacts the contact portion b without providing a through hole in the electrode portion 11d. This eliminates the risk of burning due to a temporary increase in resistance value, and improves the reliability of the electrode portion.

The power supply connector 601f is connected to the heating / pressurizing heater 1 from the back surface of the electrode portion 11d in addition to the contact member b.
By providing the urging means c that pressurizes 1, there is no need to bond the heater 11 to the film guide 601c, and the cost is greatly reduced.

<Second Embodiment> (FIGS. 5 to 7) FIG. 5A is a top view of a main part of a heater unit of the heat fixing device 6 with a part cut away and an intermediate part omitted. Fixing film is omitted).

Reference numeral 601g denotes a temperature detecting member for detecting the temperature of the ceramic heater 601a. (B) is an enlarged plan model diagram of the temperature detecting member 601g.

The temperature detecting member 601g includes a thermistor element d, first and second electrode portions ff, and a conducting portion e connecting the thermistor element d and the electrode portion f. Except for the mr element d, it is covered and insulated by a polyimide film g.

The electrode portion f is fixed to the seated portion h at the end of the film guide 601c with a double-sided polyimide tape.

FIG. 6 is an enlarged cross-sectional view of the temperature detecting connector (second housing member holding the contact member) 601h viewed from the line H-H in FIG. When the connector for temperature detection 601h is inserted into a predetermined position at the end of the film guide 601c, the contact portion i of the connector for temperature detection 601h comes into contact with the electrode portion f of the temperature detection member 601g.

FIG. 7 is a longitudinal sectional view of the main part of the heater unit, which is omitted from the line PP in FIG. The thermistor element portion d of the temperature detecting member 601g is moved from the perforated portion j provided in the film guide 601c to the heater 601.
a thermoplastic polyimide film k is fixed in advance by curing (300 ° C. to 350 ° C.) a thermoplastic polyimide film k on the surface of the glass layer 11c on the back side of the ceramic heater 601a. The number of pressing members and holding members 15 to 17 (FIG. 18) can be reduced.

The temperature rise of the heater 601a is detected by the thermistor element d of the temperature detecting member 601g disposed as described above, and the conduction section e, the electrode section f, and the connector 601 are detected.
The signal is fed back to a not-shown energization control unit via the contact point i of h. The energization control unit controls energization to the energization heating resistance layer 11b such that the heater temperature detected by the thermistor element d of the temperature detection member 601g is maintained at a predetermined substantially constant temperature (fixing temperature). That is, the heater 6
01a is heated and controlled to a predetermined fixing temperature.

The other structure is the same as that of the device of the first embodiment.

Thus, the thermistor element portion d of the temperature detecting member 601g is in contact with the heater 601a, and the electrode portion f is fixed to the film guide 601c as a holding member with a double-sided tape made of polyimide or the like. By being connected by the contact member i of the first housing member 601h (second housing member), the contact of the temperature detecting member can be easily obtained, and the space can be saved.

<Third Embodiment> (FIGS. 8 to 10 and FIG. 11)
FIG. 12A is a top view of the heater unit of the heat-fixing device 6 in which a main part of the heater unit is partially cut away and an intermediate portion is omitted (the fixing film is omitted). (B) is a plane model diagram of the temperature detecting member 601g. (C) is a heater (backside heating type AL)
FIG. 6 is a plan view in which a middle part of an N heater 601a on the side opposite to the heating surface is omitted.

As in the second embodiment, the temperature detecting member 601g includes a thermistor element d, first and second electrode portions ff, and a conducting portion connecting the thermistor element d and the electrode portion f. e, and portions other than the electrode portion f are covered and insulated by a polyimide film g.

One electrode portion f is a film guide 601.
c is fixed to the seated portion h with a polyimide double-sided tape, and the other electrode portion f is shown in FIG. 9 ((a) in FIG. 8).
(The enlarged sectional view of the connector for temperature detection 601h viewed from JJ), using the flexibility of the polyimide film g, sandwiching the film guide 601c and applying a polyimide double-sided tape to the front side of the ceramic heater 601a. It is fixed at.

When the temperature detecting connector 601h is inserted into a predetermined position at the end of the film guide 601c, the contact points m above and below the temperature detecting connector 601h are inserted.
-N and the electrode portions ff of the temperature detecting member 601g are configured to be in contact with each other, and are configured with half the space of the conventional one.

As shown in FIG. 8C, the ceramic heater (backside heating type ALN heater) 601a has two energization heating resistance layers 11b, and depends on the size of the recording material P on which the image fixing process is performed. 11b + energized heating resistor layer 11
A method of switching between a case in which b is conducted and a case in which one of the conduction heating layers 11b is conducted is controlled. In this case, the electrodes 11d of the conduction heating layer require three poles pqr.

Accordingly, the electrode p is connected to the film guide 601c.
As shown in FIG. 10 (enlarged cross-sectional view of the temperature detecting connector 601h viewed from the line KK in FIG. 8A), it is disposed at the same end as the electrode portions ff of the temperature detecting member 601g. In the same configuration as that of the first embodiment (FIG. 4), the film guide 60 is exposed so that the electrode p of the ceramic heater 601a is exposed.
1c has a hole a, which is in contact with the electrode contact b of the connector 601h for temperature detection, and which has a heater pressing spring b from the back side of the electrode.
Pressurizes the ceramic heater 601a. The temperature detecting connector 601g holds the temperature detecting member 601g and the contacts mn, bc for the ceramic heater 601a in the same housing to save space.

The other structure is the same as that of the first and second embodiments.

In the above example, the first electrode portion f of the temperature detecting member 601g is fixed to a film guide 601c as a holding member, and the second electrode portion f is connected to the first electrode portion f, the film guide 601c and the heater. Although the heat is fixed to the surface of the heater 601a opposed to the heater 601a, the second electrode f is fixed to a position facing the first electrode f to the film guide 601c. It can also be in the form. FIG. 11 and FIG. 12 show this embodiment. FIG. 11A shows the heat fixing device 6 described above.
FIG. 3 is a top view of a main part of the heater unit of FIG. (B) is a plane model diagram of the temperature detecting member 601g. (C) is a plan view of a heater (backside heating type ALN heater) 601a in which an intermediate portion on the side opposite to the heating surface is omitted. FIG. 12A shows FIG.
FIG. 1A is an enlarged cross-sectional view of the temperature detection connector 601h as viewed from XX, and FIG. 1B is an enlarged cross-sectional view of the temperature detection connector 601h as viewed from YY. (C) is a plan view of the heater unit from which the film is omitted. The length of the heater 601a is shorter than the length of the film guide 601c as a holding member.

<Fourth Embodiment> (FIGS. 13 and 15) FIG. 13 (a) is a top view of a main part of a heater unit of the above-mentioned heating and fixing device 6, which is partially cut away and partly omitted. The fixing film is omitted). (B) is a plan view of a heater (backside heating type ALN heater) 601a in which an intermediate portion on the side opposite to the heating surface is omitted.

In this embodiment, the ceramic heater 601a
In the same manner as in the first embodiment, the heat-generating resistance layer 11b on the aluminum nitride heater substrate 11a is provided on the substrate surface (substrate back surface, non-heating surface side) opposite to the side pressed by the pressure roller 602. Yes, thermistor element d for temperature detection member
Are also provided on the same substrate surface, and are covered with the glass layer 11c.

Also, since the electrode portions ff of the thermistor element d are also provided on the substrate surface side opposite to the side where the pressure roller 602 is pressed, the contact portions of the electrode portions 11d of the current-generating and heating resistance layer 11b are in contact with each other. In the same manner as the above, the film guide 60 is so exposed that the electrode portions ff of the thermistor element d are exposed.
1a is provided with a perforation a, as shown in FIG. 14 ((a) of FIG. 13).
(Shown in an enlarged cross-sectional view of a portion of the temperature detection connector 601h viewed from the line L-L), the temperature detection connector 601h is inserted into a predetermined position of the film guide 601c.
The contact part i contacts the electrode part f of the thermistor element d.

The other points are the same as in the first embodiment.

Further, the ceramic heater 601 of this embodiment
a has an energization heating resistance layer 11b on the heater substrate surface on the side where the pressure roller 602 is pressed, and the temperature detecting members de, e and f are provided on the heater substrate surface opposite to the side on which the pressure roller 602 is pressed. It may be the type that is being done.

<Fifth Embodiment> (FIGS. 15 and 16) FIG. 15 (a) is a top view of a main part of the heater unit of the heating and fixing device 6 with a partial cutout and a middle part omitted. The fixing film is omitted). (B) is a plan view of a heater (backside heating type ALN heater) 601a in which an intermediate portion on the side opposite to the heating surface is omitted.

In this embodiment, the ceramic heater 601a
In the same manner as in the first embodiment, the heat-generating resistance layer 11b on the aluminum nitride heater substrate 11a is provided on the substrate surface opposite to the side pressed by the pressure roller 602, and the thermistor element d of the temperature detecting member is provided. Are also provided on the same substrate surface, and are covered with the glass layer 11c.

One of the electrode portions f and f of the thermistor element d is provided on the side of the heater substrate opposite to the side where the pressure roller 601 is pressed, and the other electrode f is connected to the pressure roller by a through hole w. Are provided on the substrate surface side to be pressed against.

The electrode portion f provided on the side of the heater substrate opposite to the side to which the pressure roller 601 is in pressure contact has the electrode portion f in the same manner as the contact with the contact of the electrode portion 11d of the energizing heating resistor layer 11b. A hole a is formed in the film guide 601c so as to be exposed, and as shown in FIG. 14 (enlarged sectional view of the connector 601h viewed from the line MM in FIG. 15A), the temperature detecting connector 601h is connected to the film guide. 601c is inserted into a predetermined position, so that the connector for temperature detection 6
The contact portions mn provided at the top and bottom in 01h come into contact with the electrode portions ff of the thermistor element d, respectively, so that the space for the temperature detecting connector 601h is reduced to half of the conventional space.

The other structure is the same as that of the first embodiment.

The ceramic heater 601 of this embodiment is
a also has a current-generating resistance layer 11b on the heater substrate surface on the side where the pressure roller 602 is pressed, and the temperature detecting members de, ef are provided on the substrate surface opposite to the side on which the pressure roller 602 is pressed. It may be a type that does.

<Others> 1) The pressing member 602 is not limited to a roller body but can be a rotating body such as a rotating belt body.

2) In the case of a film heating type heating apparatus, an endless belt-like or cylindrical film is used as a driving method of the film 601b, and a driving roller is disposed on the inner peripheral side of the film. A driving system may be used in which a film is stretched and stretched between a plurality of members including a roller and the film is rotated and driven by a driving roller. In this manner, the film is driven by applying a tension. The method has an advantage that film transportability can be increased. The tensionless drive system as in the embodiment has an advantage that the configuration can be simplified and a low-cost heating device can be realized.

Further, it is also possible to adopt a device of a system in which a rolled long web-shaped ended film is used and is run while being rewound from the pay-out side to the take-up side.

3) In the present invention, the heating device is not limited to the heating and fixing device of the embodiment, but may be an image heating device for heating a recording material carrying an image to improve surface properties such as gloss, Apparatuses for heating a material to be heated, such as a device for heating and drying a material to be heated and a laminating device for heating, are also included.

4) The principle and process of forming an unfixed image on a recording material in an image forming apparatus are arbitrary.

[0129]

As described above, according to the present invention, a heater (ceramic heater), a temperature detecting member, a heating device using the heater and the temperature detecting member, and an image forming apparatus having the heating device are provided. It is possible to improve the reliability of the contact part of the connector part with respect to the power supply part of the heater and the electrode part of the temperature detecting member, to save space and cost of the connector part, and to achieve the intended purpose well. Is done.

A) A heating device comprising a heater substrate having a high thermal conductivity, such as aluminum nitride, having a current-generating resistance layer on the surface of the substrate opposite to the surface of the pressing member against which the pressing member is pressed. By providing a hole in the holding member so as to expose the electrode portion of the current-carrying resistance layer and making contact with the connector, the contact member can be contacted without providing a through-hole in the electrode portion of the current-carrying resistance layer. This eliminates the risk of burning due to a local increase in resistance.

In addition, in the heat fixing device, the reliability of the contact portion of the connector is not affected by the influence of water vapor generated from the recording material at the time of fixing, paper powder, grease applied to the surface of the heater, and the like. Increase.

Accordingly, it is possible to improve the throughput when printing a recording material having a narrow feature width and reduce the thermal stress when using a heater composed of a heater substrate having a high thermal conductivity such as aluminum nitride.

B) Further, by providing the urging means for pressing the heater from the back side of the electrode portion, it is not necessary to bond the heater to the holding member, thereby reducing the cost.

C) Further, by fixing the electrode portion of the temperature detecting member externally attached to the heater to the holding member with a double-sided tape made of polyimide, it is possible to easily make contact with the connector.

D) Further, the temperature detecting member is easily provided on the heater by fixing the temperature detecting member with a thermoplastic insulating film via an insulator from the side opposite to the surface of the pressing member which is in pressure contact. The electrode part of the temperature detection member can be extended to the opposite heater surface with one of the electrode parts as the holding member and the other electrode with the heater interposed, and a polyimide double-sided tape etc. By fixing the temperature detecting member, the contact of the temperature detecting member can be easily obtained, and the space for the connector of the temperature detecting member can be reduced.

E) In the type in which the temperature detecting member is provided on the heater substrate, a hole is formed in the holding member so that the electrode portion of the temperature detecting member of the heater is exposed, and a contact point of the connector is taken. There is no need to provide a through hole for the electrode of the detection member, and the cost is reduced.

Further, similarly to the electrode portion of the energized heating resistor layer,
Reliability is improved without being affected by water vapor, paper dust, grease applied to the surface of the heater, and the like.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an example of an image forming apparatus according to a first embodiment.

FIG. 2 is an enlarged model diagram of a heat fixing device part.

3A is an enlarged cross-sectional model diagram of a heating member and a pressing member portion, and FIG. 3B is a partially cutaway plan model diagram of a heater on a side opposite to a heating surface.

4A is a cutaway top view of a main part of the heater unit in the apparatus of FIG. 2 as viewed from the FF direction, and FIG. 4B is an enlarged cross-sectional view of a power supply connector portion as viewed from GG in FIG. Figure

FIG. 5A is a top view of a main part of a heater unit of a heating and fixing device according to a second embodiment, in which a part of the main part is notched and a middle part thereof is omitted, and FIG. 5B is an enlarged plan model view of a temperature detecting member;

FIG. 6 is an enlarged cross-sectional view of a power supply connector portion viewed from HH in FIG.

FIG. 7 is a vertical cross-sectional view of the heater unit taken along line PP of FIG.

FIG. 8A is a top view of a heater unit of a heating and fixing apparatus according to a third embodiment, in which a main part of a heater unit is partially cut away and a middle part thereof is omitted, and FIG.
(C) is a schematic plan view of the heater on the side opposite to the heating surface, with a portion omitted.

FIG. 9 is an enlarged cross-sectional view of the temperature detection connector portion viewed from JJ in FIG.

FIG. 10 is an enlarged cross-sectional view of the connector for temperature detection as viewed from the line KK in FIG.

11A is a top view of a main part of a heater unit of a heating and fixing device with a partial cutout and a middle part omitted, FIG. 11B is a plan view of a temperature detecting member, and FIG. A plan view of the heating surface side with a middle part omitted

12A is an enlarged cross-sectional view of the temperature-measuring connector portion viewed from XX in FIG. 11A, and FIG.
FIG. 3C is an enlarged cross-sectional view of the connector for temperature detection as viewed from Y, and FIG.

FIG. 13A is a top view of a heater unit of a heating and fixing device according to a fourth embodiment, in which a part of a main part of the heater unit is cut away and a middle part thereof is omitted, and FIG. Abbreviated plan view

FIG. 14 is an enlarged cross-sectional view of the temperature-measuring connector viewed from the line LL in FIG.

FIG. 15A is a top view of a heater unit of a heating and fixing apparatus according to a fifth embodiment, in which a part of a main part of the heater unit is cut away and a middle part is omitted, and FIG. Abbreviated plan view

FIG. 16 is an enlarged cross-sectional view of the temperature-measuring connector viewed from the line LL in FIG.

17A is a model diagram of a main part of a film heating type heating device, FIG. 17B is a plan model diagram of a partially cutout on the heating surface side of the heater, and FIG. Plan model drawing

18A is a model diagram of a main part of a film heating type heating device using a backside heating type AlN heater, FIG. 18B is a plan model diagram of a heating surface side of the heater, and FIG. Plan view of the side cutout

19A is a plan view of a heater unit from which a film is omitted, and FIG. 19B is an enlarged cross-sectional view of a power supply connector viewed from dd in FIG.

[Explanation of symbols]

 6 Heat fixing device (film heating type heating device) 601 Heating member (heater unit) 602 Pressing member (elastic pressing roller) 601a Heating heater (ceramic heater) 601b Fixing film 601c Film guide 601d Stay member 601e Flange member 601f Power supply Connector 601g Temperature detection member (thermistor) 601h Connector for temperature detection

Claims (29)

[Claims] 1. A heating device comprising: a flat substrate; an energization heating resistor layer formed on a surface of the substrate, which generates heat by energization; and an electrode portion for energizing the energization heating resistor layer. In the heater for heating a material, the energized heat generating resistance layer is formed on the substrate surface opposite to the surface side on which the material to be heated is heated, and the electrode portion is also on the same surface as the energized heat generating resistance layer. A heating heater characterized in that: 2. The heater according to claim 1, wherein the substrate of the heater is a ceramic substrate of aluminum nitride.
The heater according to claim 1. 3. A heating device comprising: a flat substrate; and a current-carrying resistance layer formed on a surface of the substrate and configured to generate heat by current supply.
In a heater for heating a material to be heated, a temperature detecting member is provided on a substrate surface opposite to a surface side on which the material to be heated is heated, and an electrode portion of the temperature detecting member is on the same surface as the temperature detecting member. A heating heater, which is provided. 4. The heater according to claim 3, wherein the substrate of the heater is a ceramic substrate of aluminum nitride.
Heater. 5. A flat substrate, and an energized heat generating resistance layer formed on a surface of the substrate and generating heat by energization,
In a heater for heating a material to be heated, a temperature detection member is provided on a substrate surface opposite to a surface side on which the material to be heated is heated, and one of the electrode portions of the temperature detection member is the same as the temperature detection member. A heater provided on a surface, and the other electrode portion is provided on a substrate on a surface side for heating a material to be heated by through holes. 6. The heater according to claim 5, wherein the substrate of the heater is a ceramic substrate of aluminum nitride.
Heater. 7. A temperature detecting member comprising: a temperature detecting element; and a conductive portion for transmitting a signal from the temperature detecting element, wherein the conductive portion is covered with an insulating film, and an end portion is formed from the insulating film. A temperature detecting member, which is exposed to form an electrode portion. 8. The temperature detecting member according to claim 7, wherein the temperature detecting element is provided on an insulating material such as a thermoplastic polyimide film. 9. A heating apparatus comprising the heater according to any one of claims 1 to 6. 10. A heater, and a temperature detecting member for detecting a temperature of the heater, wherein the temperature detecting member is the temperature detecting member according to claim 7 or 8. Heating equipment. 11. A heater comprising a flat substrate,
A film, a holding member that holds the heater and guides the inner surface of the film, a contact portion for supplying power from a power source to the heater, and a housing member that holds the contact portion A heating member, a pressing member that presses the heater of the heating member and a film across the film to form a heating nip, and the material to be heated is nipped and conveyed by the heating nip; In the heating device for heating the material to be heated by the heat of the above, the housing member is held at a predetermined position of the holding member, and the heater is mounted on a substrate opposite to a surface of the pressing member that is pressed against the heating member. An energized heat generating resistance layer that generates heat by energization is formed on the surface of the substrate, and a perforated portion is provided on the holding member such that an electrode portion to the energized heat generating resistance layer of the heater is exposed. And a contact member of the housing member is in contact with the heating member. 12. The heating device according to claim 11, wherein the heater is made of an aluminum nitride ceramic substrate. 13. The heating device according to claim 11, wherein, in addition to the contact member, the housing member includes an urging unit that presses the heater from a back surface of the electrode unit. apparatus. 14. A heater comprising a flat substrate,
A film, a holding member that holds the heater and guides the inner surface of the film, a temperature detecting member that detects the temperature of the heater, and a contact member that supplies power from a power supply unit to the heater , A heating member including a second housing member for holding a contact member for transmitting a signal from the temperature detection member to a control unit, a heater for the heating member, and a film A heating member that has a pressure member that forms a heating nip by being pressed and sandwiched between the heating nip and the heating nip, in which the material to be heated is nipped and conveyed, and the material to be heated is heated by heat from a heater through the film. The first and second housing members are fixed to predetermined positions of the holding member, and the temperature detection member contacts the heater, and the temperature detection member The heating device, wherein the electrode portion is fixed to the holding member and connected by a contact member of the second housing member. 15. The heating device according to claim 14, wherein said heater is made of an aluminum nitride ceramic substrate. 16. The heating heater according to claim 14, wherein an energized heating resistance layer that generates heat by energization is formed on a surface of the substrate opposite to a surface of the pressing member that is pressed against the heating member. The heating device according to claim 15. 17. The heating device according to claim 14, wherein the electrode portion of the temperature detecting member is fixed to the holding member with a polyimide double-sided tape. 18. A heater comprising a flat substrate,
A film, a holding member that holds the heater and guides the inner surface of the film, a temperature detecting member that detects the temperature of the heater, and a contact member that supplies power from a power supply unit to the heater , A heating member including a second housing member for holding a contact member for transmitting a signal from the temperature detection member to a control unit, a heater for the heating member, and a film A heating member that has a pressure member that forms a heating nip by being pressed and sandwiched between the heating nip and the heating nip, in which the material to be heated is nipped and conveyed, and the material to be heated is heated by heat from a heater through the film. The first and second housing members are held at predetermined positions on the holding member, the temperature detection member abuts on the heater, and the first The electrode part is fixed to the holding member, the second electrode part is fixed to the surface of the heater facing the first electrode part and the holding member and the heater, or the second electrode A heating device, wherein the unit is fixed at a position facing the first electrode unit and the holding member, and is connected by a contact member of the second housing member. 19. The heating apparatus according to claim 18, wherein said heater is made of an aluminum nitride ceramic substrate. 20. The heating heater according to claim 18, wherein an energized heat generating resistance layer which generates heat by energization is formed on a surface of the substrate opposite to a surface of the pressing member against which the pressing member is pressed. The heating device according to claim 19. 21. A connector member having a contact member for supplying power from a power supply unit to the heater and a contact member for transmitting a signal from the temperature detection member to a control unit in the same housing. The heating device according to any one of claims 18 to 20, wherein: 22. The temperature detection member according to claim 18, wherein the first electrode portion and the second electrode portion are fixed to a holding member or a heater with a double-sided tape made of polyimide. The heating device according to any one of the above. 23. A heater comprising a flat substrate,
A film, a temperature detecting member for detecting a temperature of the heater, a holding member for holding the heater and guiding an inner surface of the film, and a contact member for supplying power from a power supply unit to the heater. A heating member including a first housing member having a contact member for transmitting a signal from the temperature detecting member to a control unit, and a heater and a film of the heating member. A heating member having a pressure member that forms a heating nip by being pressed in contact with the heating nip, wherein the heating nip sandwiches and conveys the material to be heated, and heats the material to be heated by heat from a heater through the film; The first and second housing members are held at predetermined positions on the holding member, and the heater has a temperature opposite to a surface of the pressing member against which the pressing member is pressed. A degree detecting member is provided, and a perforated portion is provided on the holding member so that an electrode portion to the temperature detecting member is exposed,
A heating device, wherein a contact member of the second housing member is in contact. 24. The heating device according to claim 23, wherein the heater is made of a ceramic substrate of aluminum nitride. 25. A heater comprising a flat substrate,
A film, a temperature detecting member for detecting a temperature of the heater, a holding member for holding the heater and guiding an inner surface of the film, and a contact member for supplying power from a power supply unit to the heater. A heating member including a first housing member having a contact member for transmitting a signal from the temperature detecting member to a control unit, and a heater and a film of the heating member. A heating member having a pressure member that forms a heating nip by being pressed in contact with the heating nip, wherein the heating nip sandwiches and conveys the material to be heated, and heats the material to be heated by heat from a heater through the film; The first and second housing members are held at predetermined positions on the holding member, and the heater has a temperature opposite to a surface of the pressing member against which the pressing member is pressed. A temperature detecting member is provided, a first electrode portion of the temperature detecting member is provided on a surface of the pressing member that is in pressure contact with a through hole, and the holding member includes a pressing member for pressing the temperature detecting member. A perforated portion is provided so that the second electrode portion on the surface opposite to the surface in contact with the pressure contact is exposed, and the first electrode portion and the second electrode portion are contacted by the contact member of the second housing member. A heating device wherein both of the electrode portions are in contact with each other. 26. The heating apparatus according to claim 25, wherein said heater is made of an aluminum nitride ceramic substrate. 27. A heater comprising a flat substrate,
A film, a holding member that holds the heater and guides the inner surface of the film, a temperature detecting member that detects the temperature of the heater, and a contact member that supplies power from a power supply unit to the heater A heating member including a first housing member having a contact member for transmitting a signal from the temperature detecting member to a control unit, and a heater and a film of the heating member. A heating member having a pressure member that forms a heating nip by being pressed in contact with the heating nip, wherein the heating nip sandwiches and conveys the material to be heated, and heats the material to be heated by heat from a heater through the film; The first and second housing members are held at predetermined positions of the holding member, and the heater is mounted on a surface of the substrate opposite to the surface of the pressing member against which the pressing member is pressed. An energized heat generating resistance layer that generates heat by energization is formed, and the temperature detecting means is connected to the energized heat generating resistive layer via two types of insulators from the side opposite to the surface of the pressing member that is in pressure contact. A heating device fixed, wherein at least one of the two types of insulators is a thermoplastic insulating film. 28. The heating target material is a recording material carrying an image, and the recording material is nipped and conveyed by the heating nip.
28. An image heating device for heating an image on the recording material by heat from a heater via the film or a heat fixing device for fixing an unfixed image as a permanent image. The heating device according to any one of the above. 29. The heating device according to claim 11, wherein the heating device is an image heating device for heating an image on a recording material or a heat fixing device for fixing an unfixed image as a permanent image. An image forming apparatus comprising: