KR100924496B1 - Electro Photographic Type Image Forming Apparatus - Google Patents

Abstract

The present invention relates to an electrophotographic image forming apparatus, the electrophotographic image forming apparatus according to the present invention comprises: a pressure driving unit having a driving belt of a conveyor driving type; A guide member installed on an upper side of the pressure driving unit and having an opposing horizontal plane forming a parallel plane with a horizontal transfer unit of the driving belt; A heat generating means stacked on an outer surface of the opposite horizontal surface of the guide member to provide heat generation using a thin film heater; And is mounted in a form surrounding the outer surface of the guide member to receive heat, and is friction driven to face the horizontal conveying portion of the pressurizing drive unit, so that the transfer and heating of the recording material introduced between the friction surfaces is performed. A sleeve.

According to the present invention, a heating means including a thin film heater is formed on the upper surface of the guide member to utilize the entire surface of the guide member as a heating plate, and at the same time, the structure of the pressurizing drive portion is formed in a conveyor driving shape, thereby ensuring sufficient heating area and heating time. High speed output is possible.

Description

Electrophotographic Image Forming Apparatus {Electro Photographic Type Image Forming Apparatus}

1 is a cross-sectional view schematically showing the internal structure of an image forming apparatus using a conventional halogen lamp.

2 is a cross-sectional view schematically showing the internal structure of an image forming apparatus using a conventional plate heater.

3 is a sectional view schematically showing the internal structure of an image forming apparatus using a thin film heater according to a first embodiment of the present invention;

4 is an enlarged view of a portion “A” of FIG. 3.

Figure 5 is a schematic diagram showing another embodiment of the pressure driving unit according to the first embodiment of the present invention.

Figure 6 is an enlarged cross-sectional view showing a cross-sectional structure of the heating means according to the present invention.

7 is an enlarged cross-sectional view showing a cross-sectional structure for an enlarged cross-sectional view showing a first modification of the heat generating means according to the present invention.

8 to 10 are exemplary views showing various embodiments of a conductor pattern formed on a thin film heater according to the present invention.

11 to 12 are exemplary views showing embodiments of various arrangement patterns of the electrode and the thin film heater according to the present invention.

Figure 13 is a schematic diagram showing the specifications of the specimen for testing the heating means according to the invention.

14 is a graph measuring a temperature change value according to a time displacement in a state in which a constant current (50W) is applied to the specimen of FIG. 13.

15 is a graph measuring a temperature change value according to the displacement of the amount of current applied for the time (10 seconds) specified in the specimen of FIG.

Fig. 16 is a sectional view schematically showing the internal structure of an image forming apparatus using a thin film heater according to a second embodiment of the present invention.

17 is a detailed view of the portion “B” of FIG. 16;

18 is a detailed view of the portion “C” of FIG. 16.

19 is an enlarged cross sectional view showing a second modification of the heat generating means according to the present invention;

20 is an enlarged cross-sectional view showing a third modification of the heat generating means according to the present invention;

Fig. 21 is a sectional view schematically showing the internal structure of an image forming apparatus using a thin film heater according to a third embodiment of the present invention.

Fig. 22 is a sectional view schematically showing the internal structure of an image forming apparatus using a thin film heater according to a fourth embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

110: pressure driving unit 111: drive wheel

113: drive belt 113a: horizontal feed section

113b: Reinforcement pin 113c: Link

115: pressure plate 115a: flat plate portion

115b: guide blade 115c: support

117: tension adjusting roller 119: pressure plate sleeve

120: heat generating means 122: insulating film

123: thin film heater 124: conductor pattern

125: electrode 127: protective layer

130: guide member 131: opposing horizontal plane

133: wing 140: sleeve

150: flange member 151: collar washer

153: sliding part

The present invention relates to an electrophotographic image forming apparatus, and more particularly, a heat generating means including a thin film heater is formed on an upper surface of a guide member, thereby utilizing the entire surface of the guide member as a heating plate, and at the same time, the structure of the pressure driving unit drives the conveyor. The present invention relates to an electrophotographic image forming apparatus in which a heating area and a heating time are sufficiently secured to enable a high speed output.

In general, a fixing apparatus used for fixing toner particles transferred to a print medium such as a laser printer or a digital copier has a structure as shown in FIG.

1 is a cross-sectional view schematically showing the internal structure of an image forming apparatus using a conventional halogen lamp.

The conventional fixing device has a heat generating portion of the cylindrical metal tube 12 and the halogen lamp 11 provided in the center of the inside, the coating layer 13 made of Teflon or the like is formed on the surface of the cylindrical metal tube 12.

The radiant heat is generated from the halogen lamp 11 inside the cylindrical metal tube 12 of the heat generating portion, so that the cylindrical metal tube 12 is indirectly heated.

The pressure roller 15 is positioned below the cylindrical metal tube 12 with the printing paper 14 therebetween.

The pressure roller 15 presses the printing paper 14 with a constant force by the pressure spring 16.

Accordingly, the toner 17 in the form of powder powder is fixed on the printing paper by the heat generated by the heat generating unit, and an image is formed on the printing paper.

Such a conventional fixing device requires a significant preheating time of several tens of seconds or more in order to raise the cylindrical metal tube 12 at room temperature to the temperature at which the toner 17 is fixed at the time of power on / off of a printer and a digital copier.

This is an indirect heating method in which the heat of the heat generating unit is transferred to the printing paper as radiant heat via the atmospheric or cylindrical metal tube 12, and also, when switching from the standby mode to the operating mode for printing, to raise it to the fixing temperature for several tens of seconds or more. There is a problem in that the waiting time for users is long because time is required.

In addition, the conventional fixing device has a problem that the initial power used to operate the halogen lamp is 1.0Kw ~ 3Kw high power, the power consumption is large.

Accordingly, a film heating system as disclosed in Japanese Patent Laid-Open Nos. 63-212182, 2-157878, 4-44075 to 4-44083, 4-204980 to 4-204984, etc. is adopted. A heating fixture has been proposed.

Such a heating fixing device is a heating member such as a ceramic heater fixedly disposed by a pressure driving unit or a pressure member (hereinafter referred to as a heating body) and a heat resistant film acting as a rotating member for heating (hereinafter referred to as a fixing film or sleeve). ) Is intimately contacted, thereby slidably rotating the fixing film.

Then, the toner image is formed and the recording material having the toner is introduced into the fixed nip which acts as a pressure contact nip configured so that the fixed film is disposed between the heating body and the pressure driving unit, and the introduced recording material is conveyed together with the fixed film. Thereby, the toner image is heat-pressed and fixed to the surface of the recording material as a permanent fixed image by the pressure of the fixed nip portion and the heat applied from the heating body through the fixed film.

The heating fixing device adopting the film heating system can use a linear heating element of a small heat capacity such as a ceramic heater as the heating element, and can also use a thin film of a small heat capacity as the fixing film, thereby saving power. It is possible to reduce the waiting time (ie, to start quickly). Incidentally, the method of providing a driving roller on the inner surface of the fixed film and the method of using the pressure driving unit as the driving roller and thus driving the fixed film by the frictional force between the driving roller and the pressure driving unit are heat-fixed employing a film heating system. Known as a fixed film drive system to be used in the apparatus.

FIG. 2 is a cross-sectional view schematically showing the internal structure of a conventional image forming apparatus using a plate heater, illustrating an example of a heat fixing apparatus employing a pressure driving unit driving system and a film heating system.

In the same figure, reference numeral 20 denotes a heating assembly, and reference numeral 22 denotes an elastic pressing drive which acts as a pressure member. The elastic pressing drive 22 and the heating assembly 20 arranged in parallel up and down are in pressure contact with each other to form a fixed nip N.

The heating assembly 20 serves as a flexible rotating body in contact with the heater 23, the film guide 25, which serves as a guide member for supporting the heater 23, the heater 23, which serves as a heating member, and It is an assembly comprised of the cylindrical fixing film 21 containing the film guide 25, the flange member 26 etc. which support the fixing film 21 by the both ends, and are fitted to the film guide 25.

At this time, the heater 23 is a rectangular ceramic heater having a longitudinal length extending along a direction perpendicular to the conveying direction of the recording material P, the heat capacity of which is small in total, and the heater 23 accommodates the power supply. To generate heat.

In addition, the film guide 25 is a groove-shaped rectangular member whose cross section is substantially semicircle, and the longitudinal side part extends in the direction perpendicular to the conveying direction of the recording material P. For example, the film guide 25 is Made of phenolic thermosetting resin. The heater 23 is fitted into the heater fitting groove formed in the longitudinal direction at the center of the lower surface of the film guide 25 and is thus fixedly supported.

The cylindrical fixing film 21 is loosely fitted to the film guide 25 to which the heater 23 is fitted.

The flange member 26 has a collar washer portion 26a for holding the end of the cylindrical fixing film 21 and adjusting the movement of the fixing film in the axial direction thereof, and a cylindrical fixing film 21 which is substantially arc and supports the fixing film end. And a sliding portion 26b fitted to the inside of the end portion thereof. The flange member 26 is fitted to both ends of the film guide 25 and is thus fixed.

The elastic pressing drive 22 is rotatably bearing supported between the side covers (not shown) of the heating fixing device, and the heating assembly 20 has the heater 23 side downward and is parallel to the elastic pressing drive 22. And the heating assembly 20 and the elastic pressure drive part 22 are pressurized with each other by pressure means not shown with respect to the elasticity of the pressure drive part 22, and the heater 23 and the pressure drive part 22 are connected thereto. The pressure nip N, which is in pressure contact with each other, is thus arranged between the heater 23 and the pressure driver 22, whereby the fixed nip N acting as a pressure contact nip of a predetermined width is provided by the pressure driver ( It is formed due to the elastic deformation of 22).

The elastic pressing drive part 22 is rotatably driven counterclockwise as indicated by an arrow by a driving means not shown. By rotatably driving the pressure driver 22, the rotational force is applied to the fixed film 21 at the fixed nip N due to the frictional force between the pressure drive 22 and the outer surface of the fixed film 21. Thereafter, the inner surface of the fixed film 21 substantially corresponds to that of the pressurizing drive 22 as the inner surface of the fixed film 21 comes into close contact with the lower surface of the heater 23 at the fixed nip N and thus slides along. At the circumferential speed, the circumference of the film guide 25 is rotated in the clockwise direction as indicated by the arrow. (Pressure driving unit drive system)

The movement of the rotation fixing film 21 in the axial direction (the longitudinal direction) is adjusted by the collar washer portion 26a of the flange member 26, and the inside of the end portion of the fixing film 21 has the It is supported by the sliding part 26b and guided rotatably.

Thereafter, the fixed film 21 is rotatably driven by the pressure driving unit 22, and the unfixed toner image T is formed while the temperature reaches a predetermined temperature due to charging of the heater 23. And the recording material P having the same is introduced into the position between the pressure driving section 22 and the fixed film 21 in the fixed nip N in the non-shown image forming section, the recording material P ) Overlap and pass through the fixed nip N together with the fixed film 21 in a state of being in close contact with the outer surface of the fixed film 21.

Heat energy of the heater 23 is applied to the recording material P through the fixing film 21 while the recording material P passes through the fixed nip N, whereby the non-fixed toner of the recording material P The image T is subjected to a hot melt fixing step. Thereafter, the recording material P passing through the fixed nip N is separated from the surface of the fixed film 21 at the separation point A and then discharged.

However, the image forming apparatus of the prior art having the above-described configuration has recently limited the heat generation area of the heater despite the demands of the increase in the printing speed. There was a problem that the fixing operation is not performed properly because the heating time is not enough.

In addition, the prior art has a problem that the life is shortened as the heater is formed on the bottom surface of the film guide and is subjected to the pressing force by the pressure driving unit and the continuous friction with the sleeve is made.

In addition, the prior art has a problem that the preheating time of the heater takes a long time, the working waiting time is long.

In addition, the conventional technique has a problem that an excessive temperature difference occurs between the passage region of the recording material P and the non-passing region by using a ceramic substrate having low thermal conductivity as the substrate on the upper portion of the heating heater. By using Ag / Pd paste, there was a problem that manufacturing cost was high.

An object of the present invention for solving the above problems is to provide an electrophotographic image forming apparatus that utilizes the entire surface of the guide member as a heating plate by forming a heating means including a thin film heater on the upper surface of the guide member.

Further, another object of the present invention is to provide an electrophotographic image forming apparatus of a conveyor structure in which the rotation axis of the pressure driving unit is formed in two or more multiple axes.

Further, another object of the present invention is to provide an electrophotographic image forming apparatus having a heat generating means capable of high speed heat generation for shortening the preheating time.

It is still another object of the present invention to provide an electrophotographic image forming apparatus in which heat generating means are simultaneously formed on upper and lower surfaces of a guide member.

An electrophotographic image forming apparatus according to the present invention for achieving the above object includes a pressurizing driver having a driving belt of a conveyor driving method; A guide member installed on an upper side of the pressure driving unit and having an opposing horizontal plane forming a parallel plane with a horizontal transfer unit of the driving belt; A heat generating means stacked on an outer surface of the opposite horizontal surface of the guide member to provide heat generation using a thin film heater; And is mounted in a form surrounding the outer surface of the guide member to receive heat, and is friction driven to face the horizontal conveying portion of the pressure driving unit, so that the transfer and heating of the recording material introduced between the friction surfaces is performed. It includes a sleeve.

Here, the heating means, the thin film is deposited on the outer surface of the guide member is a thin film heater that is instantaneously generated by receiving power; And an electrode forming an electrical connection pattern to supply uniform power to the thin film heater.

In addition, the heat generating means, the insulating film is deposited on the outer surface of the guide member to provide electrical insulation and thermal conductivity; A thin film heater that is thin film deposited on an outer surface of the insulating film and is instantaneously generated by receiving power; And an electrode forming an electrical connection pattern to supply uniform power to the thin film heater.

In addition, the heat generating means, the electrode for forming an electrical connection pattern to supply a uniform power to the outer surface of the guide member; And a thin film heater that is thin film deposited on an upper surface of the electrode and the guide member to receive power and instantaneously generate heat.

In addition, the heat generating means, the insulating film is deposited on the outer surface of the guide member to provide electrical insulation and thermal conductivity; An electrode forming an electrical connection pattern to supply uniform power to an outer surface of the insulating film; And a thin film heater that is thin film deposited on an upper surface of the electrode and the guide member to receive power and instantaneously generate heat.

Here, the electrode is characterized in that formed by fusion or vacuum sintering method.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view schematically illustrating an internal structure of an image forming apparatus using a thin film heater according to a first embodiment of the present invention, and FIG. 4 is an enlarged view of portion “A” of FIG. 3.

The present invention as shown in the figure is a pair of drive wheels 111 provided a predetermined distance apart is connected to the drive belt 113, the pressure drive unit 110 is driven by a conveyor drive, and installed on the pressure drive unit 110 In addition, the guide member 130 is formed on the opposite horizontal surface 131 forming a parallel plane with the horizontal conveying portion (113a) of the drive belt 113, and the thin film heater is laminated on the opposite horizontal surface 131 of the guide member 130 Heat generating means 120 to provide heat generation using the 123 and the outer surface of the guide member 130 is mounted to receive heat and friction in a state facing the conveying plane of the pressure drive unit 110 And a sleeve 140 which drives and heats the recording material which is driven and input.

At this time, the pressure drive unit 110, a pair of drive wheels 111 for power transmission, the drive belt 113 is installed to surround the outer periphery of the drive wheel 111 and the inside of the drive belt 113. Is installed in the pressure plate 115 is configured to press the upper surface of the belt toward the guide member (130).

The pressure plate 115 is preferably to be elastically supported by a separate elastic member (compression spring, etc.), the material may be a metal bearing.

In addition, the driving belt 113 may be an elastic pressing belt using a rubber material having a high surface friction coefficient.

Such a driving belt 113 may be provided with a myriad of reinforcing pins 113b in the transverse direction of the elastic rubber sheet to reinforce the strength.

The reinforcement pins 113b may be connected using the link 113c.

The driving belt 113 may vary in thickness, number, and material of the reinforcing pins 113b installed according to the pressing force according to the product.

At this time, both ends of the pressure plate 115 is formed in a semi-circular shape, the pressure plate sleeve 119 is coupled to the pressure plate 115 in a state capable of sliding around the outer surface, the pressure plate sleeve 119 is a driving belt 113 It is to help the rotation of the.

Next, the guide member 130 is provided with a heat source for heating and fixing the toner of the recording material P to the sleeve 140 by heating the entire surface by the heat generating means 120 stacked thereon. It consists of an opposing horizontal surface 131 is stacked 120 and the wing portion 133 formed to extend to at least one end of the left and right ends of the opposing horizontal surface 131.

The wing 133 serves to preheat the sleeve 140 before the opposing horizontal surface 131, and the length of the wing may be longer or shorter, which may be implemented in various forms according to the characteristics of the product. .

Such, the guide member 130 should be excellent in thermal conductivity, and mechanical strength should be excellent enough to withstand the pressure of the pressure driving unit (110).

Therefore, the guide member 130 is preferably used a conductive metal such as aluminum or stainless steel having excellent thermal conductivity, but may be made of a non-metal, non-conductive material if the above conditions are satisfied.

In addition, both ends of the guide member 130 may be coupled to the flange member 150 for guiding the departure prevention and driving trajectory of the sleeve 140.

Next, the heat generating means 120 includes a thin film heater 123 capable of driving low power (eg, 500 W, etc.). The thin film heater 123 generates heat at a very high speed when external power is supplied. As a characteristic, it is possible to shorten the waiting time of work due to preheating of a printer, a copy machine, and the like.

Such heat generating means 120 is a thin film is deposited, because it is formed to a very thin thickness it is possible to slim down the size of various office equipment using the electrophotographic method.

Next, a thermosetting resin is used for the sleeve 140, and is loosely fitted to the guide member 130. Such a thermosetting resin directly heat-presses the toner T of the recording material P. FIG.

Next, the flange member 150 is coupled to both ends of the collar washer 151 and the guide member 130 to hold the end of the sleeve 140 and adjust the movement of the sleeve 140 in the axial direction thereof. And a sliding portion 153 that is in sliding friction with the end of 140.

Figure 5 is a schematic diagram showing another embodiment of the pressure drive unit according to the first embodiment of the present invention, the pressure drive unit 110 of the present invention as shown in the drawing is a drive belt between a pair of drive wheels 111 Tension control roller 117 for tension control of the 113 can be installed.

The tension control roller 117 is to adjust the tension of the drive belt 113 as the rotating shaft is fixed in a state capable of moving in the vertical direction.

6 is an enlarged cross-sectional view showing a cross-sectional structure of the heat generating means according to the present invention, illustrating an example in which the heat generating means 120 of the present invention is installed on the back surface of the guide member 130 made of a non-conductive material.

Heat generating means 120 of the present invention as shown in the drawing is a guide member 130 made of a non-conductive material, and is mounted in the form of a thin film on the outer surface of the guide member 130 is supplied with power from the outside to itself electric Electrical bonding is made to the thin film heater 123 which is instantaneously heated at high temperature by instantaneous heating according to a resistance, and the power supplied from the outside may be uniformly applied to the entire surface of the thin film heater 123. The electrode 125 having a specific pattern, and the protective layer 127 coated with a predetermined thickness to protect the electrode 125 and the thin film heater 123 from the external environment.

In this case, as the material of the guide member 130 of the non-conductive material, heat-reinforced plastics, heat-resistant resins, ceramics, glass, ceramics, stones, and the like that can withstand at least 250 ° C. or more may be used.

7 is an enlarged cross-sectional view showing a cross-sectional structure for an enlarged cross-sectional view showing a first modification of the heat generating means according to the present invention, the heat generating means 120 of the present invention on the back surface of the guide member 130 made of a conductive material The installation example is explained.

Heat generating means 120 of the present invention as shown in the drawing is coated with a predetermined thickness on the guide member 130 made of a conductive material, the inner surface of the guide member 130 is provided with electrical insulation properties and at the same time excellent thermal conductivity The insulating film 122 and the thin film heater 123 mounted in the form of a thin film in the lower portion of the insulating film 122 is supplied with power from the outside and instantaneously generates high temperature by instantaneous heating according to its own electrical resistance. The electrode 125 is electrically connected to the thin film heater 123 and has a specific pattern to allow power supplied from the outside to be uniformly applied to the entire surface of the thin film heater 123, the electrode 125, and The thin film heater 123 is composed of a protective layer 127 coated to a predetermined thickness so as to be protected from the external environment.

Here, the thickness of the guide member 130 made of the conductive material is preferably made of 1 mm ~ 3 mm, a metal such as aluminum or stainless steel may be used as the material.

At this time, as shown in FIGS. 6 and 7 by forming a conductor pattern 124 to help supply current on the thin film heater 123, the current applied through the electrode 125 of the thin film heater 123 It can be supplied uniformly to the whole surface, and can make heat-generation characteristic stabilize.

Hereinafter, properties required for each component such as the insulating film 122, the thin film heater 123, the conductor pattern 124, the electrode 125 and the protective layer 127 constituting the heat generating means 120 of the present invention And in more detail about the configuration conditions are as follows.

First, the insulating film 122 is made thinner as much as possible so that the heat generated from the thin film heater 123 can be conducted to the guide member 130 at a high speed, and also between the guide member 130 and the thin film heater 123. An insulating film using a ceramic material or a polymer material such as alumina (aluminum oxide, Al 2 O 3) or magnesia (magnesium oxide, MgO) or the like, or a mixed material of the two insulating films may be used for electrical insulation.

In addition, the insulating layer 122 may have a thin thickness such that heat generated from the thin film heater 123 may be conducted to the guide member 130 at a high speed, and the guide member 130 and the thin film heater 123 may be used. ) 0.5 μm to 500 μm, in particular 0.5 μm to 200 μm, is sufficient to electrically insulate the liver, and thickness may vary depending on the material.

The conditions of the insulating film 122 is as follows.

First, the insulating film 122 must electrically insulate between the guide member 130 and the thin film heater 123, and the thin film heater 123 to electrically isolate the thin film heater 123 supplied with external power. When the voltage of about 1000V is applied, the breakdown of the insulating film 122 should not occur and the electrical leakage current of the insulating film 122 should be 20 μA or less.

In addition, when the high temperature heat is generated in the thin film heater 123, the insulating film 122 is in contact with the insulating film 122 and the guide member 130 so as not to physically detach from the guide member 130 and the thin film heater 123, respectively. The contact between the insulating film 122 and the thin film heater 123 should be excellent.

In addition, when the high temperature heat is generated in the thin film heater 123, the insulating film 122 does not cause a chemical reaction with the guide member 130 and the thin film heater 123, respectively, and the surface roughness of the insulating film 122 should be excellent.

That is, when the surface roughness of the insulating film 122 is not excellent, since the insulating film 122 affects the electrical resistivity of the thin film heater 123, the insulating film 122 affects the electrical resistivity of the thin film heater 123. It is desirable to have a surface roughness to the extent that it does not affect.

In order to satisfy the conditions as described above, the insulating film 122 is an oxide insulating film obtained by oxidizing the surface of the guide member 130 of a metal material such as aluminum or stainless steel with an arc, or a ceramic, One or both of an insulating film coated with glass, porcelain, or the like, or a polymer insulating film coated with a polymer-based material (Polyimide, Polyamide, Teflon, PET, etc.) on the surface of a metal guide member 130 such as aluminum or stainless steel. An insulating film or the like having at least two branches formed on the surface of the guide member 130 is used.

A method of forming the oxide insulating film will be described below.

First, electric energy such as an arc is applied from the outside to the surface of the guide member 130 made of metal such as aluminum (Al) or beryllium (Be) or titanium (Ti) or stainless steel (immersed in an alkaline electrolyte solution). The metal atoms on the surface of the guide member 130 and the external oxygen cause an electrochemical reaction to be formed by converting the characteristics of the surface of the guide member 130 into an oxide film.

As the oxide insulating layer, Al 2 O 3, ZrO 3, Y 2 O 3, or the like may be used, and the oxide insulating layer may be formed on the guide member 130 by using a plasma spray coating method.

Hereinafter, the process of forming the oxide insulating film on the guide member will be described.

First, the concentration of the alkaline electrolyte filled in the bath is evaluated, and the conductor is connected to the guide member 130 made of aluminum so that external power can be supplied to the guide member 130 made of aluminum. The guide member 130 of aluminum material is immersed in an alkali electrolyte in a container, and then external power is supplied to the guide member 130 of aluminum material to oxidize the surface of the aluminum guide member 130.

Next, an arc is generated on the surface of the aluminum guide member 130 as a strong power source having a high frequency alternating current (AC) shape is applied to the aluminum guide member 130 by an oxide insulating film forming process. Accordingly, an oxide insulating layer having a high oxidation density and a very small pinhole concentration is formed on the surface of the guide member 130 of aluminum.

Aluminum oxide may be formed on the surface of the guide member 130 made of aluminum material or titanium oxide may be formed on the surface of the guide member 130 made of titanium material, or the beryllium material guide member 130 may be formed using the oxide film forming process. Beryllium oxide can be formed on the surface.

On the other hand, the polymer insulating film is formed by coating a polymer-based material having a uniform thickness to ensure electrical insulation on the surface of the guide member 130 of the metal material.

In particular, the polymer insulating film should be less thermally deformed when heat is generated in the thin film heater 123. In addition, the polymer insulating film should have excellent contactability so that physical desorption from the guide member 130 and the thin film heater 123 does not occur when the high temperature heat is generated in the thin film heater 123, respectively, and the guide member 130. And do not cause a chemical reaction with the thin film heater 123, respectively, and the surface roughness should be excellent.

A process of forming the polymer insulating film will be described below.

First, the polymer insulating layer is formed using a liquid organic polymer material, and is coated with a uniform thickness on the surface of the guide member 130 of a metal material.

Here, as the coating method, a spin coating method, a spray coating method, a dipping coating method, a screen printing method, or the like is used.

In addition, the polymer material may be a polyimide-based material, a polyamide-based material, a teflon-based material, a paint-based material, silver-ston, Tefgel-S ( tefzel-s), epoxy, rubber, or the like, or a material that is sensitive to ultraviolet light (UV) may be used.

For example, the process of forming the polyimide-based material on the guide member 130 by spray coating will be described below.

First, the guide member 130 is organically washed with acetone, isopropyl alcohol (IPA), and the like, and then the guide member 130 is rotated at a high speed (for example, 2,000 rpm or more), and is made of polyimide. After spraying the material on the guide member 130, the polyimide-based material coated on the surface of the guide member 130 is heat treated.

The polymer insulating film having a high thermal stability and a glassy temperature (GT) of 300 ° C. or more is formed on the surface of the guide member 130 by the spray coating method of forming a polymer insulating film.

In addition, by slowly cooling the polyimide-based material during the heat treatment of the polyimide-based material, the adhesion between the polymer insulating film and the guide member 130 is excellent, and the polymer-based material is coated on the surface of the guide member 130 during the spray coating process. The thickness uniformity is excellent, and the pinhole concentration of the polymer insulating film is very small, so that no electric leakage current is generated.

On the other hand, the double insulating film of the oxide insulating film and the polymer insulating film forms an oxide insulating film on the surface of the guide member 130 of the metal material and then coats a polymer-based material with a uniform thickness on the oxide insulating film or, conversely, the surface of the guide member of the metal material. The polymer-based material may be coated on and an oxide insulating film is formed thereon.

The total thickness of the double insulating film of the oxide insulating film and the polymer insulating film is the thickness of the result of forming the oxide insulating film on the surface of the guide member 130 alone and the thickness of the result of forming the polymer insulating film on the surface of the guide member 130 alone. It can be small compared to the sum, and can minimize the breakdown of the insulation compared to each single insulating film.

Here, the main reason for the oxide insulating film insulation breakdown may be caused by the external power supplied to the thin film heater 123 being transferred into the pinhole due to the pinhole formed in the oxide insulating film.

The main reason for the breakdown of the polymer insulating film may be due to bubble generation due to the application of liquid Pr at the time of forming the polymer insulating film, and then the dielectric breakdown may occur at the portion where the bubble was present after the polymer insulating film was solidified.

Therefore, it is preferable to compensate for the occurrence of dielectric breakdown inherent in each of the oxide insulating film or the polymer insulating film with a double insulating film of the oxide insulating film and the polymer insulating film.

The thickness of the insulating film 122 is preferably in the range of 0.5 μm to 500 μm, particularly 0.5 μm to 200 μm, for thermal efficiency (the thickness varies depending on the material), and the dielectric breakdown voltage of the insulating film 122 ( The breakdown voltage is 1,000 V or more, the leakage current of the insulating film 122 is 20 μA or less when the voltage reaches 100 V, and when the heat is generated in the thin film heater 123 (thermal cycle), the insulating film 122 ) So that desorption (peeling) is not generated from each of the guide member 130 and the thin film heater 123.

The insulating film 122 may be formed of a natural hardening or thermosetting ceramic using a thick film coating method, and the ceramic insulating film 122 may improve the breakdown voltage characteristics.

In this case, it is preferable that the withstand voltage characteristic is 2 kV or more.

Next, the thin film heater 123 will be described. The thin film heater 123 is mounted on the insulating film 122 in the form of a thin film having a thickness of 0.05 μm to several μm (eg, 0.05 μm to 2 μm), and the electrode When external power (DC power or AC power) is supplied through 125, joule heating is generated by its own electrical resistance.

Here, due to the thin film characteristics of the thin film heater 123, that is, the small volume, the heat generation rate and the cooling rate may be made very fast, and the temperature generated by the self electrical resistance may exceed 500 ° C. Alternatively very fast temperature rises are possible.

The conditions of the thin film heater 123 are as follows.

First, the thin film heater 123 is capable of increasing the temperature at a faster rate than the conventional heater due to the thin film property, but due to this thin film property, the current flow rate (current flux), etc. can be very large, its own electrical / thermal Chemical resistance is required.

That is, the thin film heater 123 should have a high electrical strength (heater strength), and the self-resistance to the energy applied continuously through the electrode 125 should be high, but the long life of the thin film heater 123 can be maintained. .

In addition, the thin film heater 123 is mounted on the insulating film 122, so that the insulating film 122 is not detached due to heat generation and the peeling between the guide member 130 and the insulating film 122 should not occur.

In addition, the thin film heater 123 is a device that is continuously subjected to a thermal shock, it should be such that a significant increase in the change in its resistance is not caused by the thermal shock.

In addition, the thin film heater 123 may generate heat at a high temperature while being exposed to air (oxygen), but it is necessary to prevent a significant increase in its resistance due to such oxidation.

In order to satisfy the above conditions, a thin metal having a high melting point (eg, Ta, W, Pt, Ru, Hf, Mo, Zr, Ti, etc.) may be used as the material of the thin film heater 123, Combined two-component metal alloys (e.g. TaW, etc.) are used, or two-component metal-nitride series (e.g., WN, MoN, ZrN, etc.) combined with metal-nitride is used, or metal-silicides ( Two-component metal-silicide series (for example, TaSi, WSi, etc.) combining metal-silicide is used.

In addition, the thin film heater 123 may have a thickness of several μm or less (eg, a difference in thickness occurs depending on a material, such as a range of 0.05 μm to 2 μm).

In particular, in order to increase the temperature of the thin film heater 123 instantaneously, that is, to minimize the time taken to heat itself, the heat capacity of the thin film heater 123 itself may be very small.

That is, the heat capacity of the thin film heater 123 is expressed as a function using the thickness as a parameter, and as the thickness of the thin film heater 123 becomes thin, the value thereof decreases. On the other hand, the life of the thin film heater 123 may be shorter as the thickness becomes thinner.

Therefore, in the present invention, the optimum thickness range of the thin film heater 123 may be derived through various simulations and experiments to satisfy two conditions for instantaneously raising the temperature of the thin film heater 123 and extending the life. On the other hand, there is a slight difference depending on the material of the thin film heater 123, it turns out that it is a minute difference.

That is, the optimum thickness of the thin film heater 123 is derived based on the following equation.

(resistivity)는 박막 히터(123) 소재의 고유한 비저항값이고, Rs(sheet resistance)는 박막 히터(123)의 면 저항값이고, t(thickness of film)는 박막 히터(123)의 두께이다. 한편, 두께와 고유 비저항값은 비례 관계에 있음을 알 수 있다.here,

(resistivity) is a specific resistivity value of the thin film heater 123 material, Rs (sheet resistance) is the sheet resistance value of the thin film heater 123, t (thickness of film) is the thickness of the thin film heater 123. On the other hand, it can be seen that the thickness and the specific resistivity are in proportion.

Therefore, when the simulation using the above-described parameters as input data in consideration of the specific resistance range of the thin film heater 123 material, the optimum thickness range of the thin film heater 123 according to the characteristics of each product according to the material (eg; 0.05 μm to 2 μm, etc.).

The thin film heater 123 is formed on the insulating film 122 by the vacuum deposition method, the vacuum deposition method PVD (Sputtering, Reactive Sputtering, Co-Sputtering, Evaporation, E-beam, etc.) and CVD (LPCVD, PECVD, etc.) ) Is used.

8 to 10 are exemplary views showing various embodiments of a conductor pattern formed on a thin film heater according to the present invention. As shown in the figure, the electrical resistance is lower than the thin film heater on the thin film heater 123 and the thermal conductivity is low. The high conductor pattern 124 can be formed in various shapes, shapes and spacings.

If the thin film heater 123 in which the conductor pattern 124 is not formed is used, a temperature difference occurs between the electrode introduction portion and the center portion of the thin film heater 123 at the initial stage of power supply, so that the entire surface of the thin film heater 123 is uniform. If the temperature distribution is not achieved or overheating occurs in a part of the thin film heater 123, the film may cause fatal damage (deterioration) to the thin film heater 123 or the insulating film 122, and the life of the thin film heater may be extremely extreme. Can be shortened.

That is, in order to prevent such a phenomenon and to generate uniform heat generation on the entire surface of the thin film heater 123 in a faster time at the initial power supply, various shapes as shown in FIGS. 8 to 10 on the thin film heater 123. And to form a conductive pattern 124.

As such, when the conductor pattern 124 is formed on the thin film heater 123, the production yield may be improved as compared to a single thin film heater in which the conductor pattern is not formed in the thin film heater 123. This is because a single thin film heater in which a sieve pattern is not formed can solve a conventional problem leading to deterioration of the quality of the entire resistor even when a small thickness difference of a part of the entire thin film heater or damage of some thin films such as scratches.

Next, the electrode 125 will be described, and the electrode 125 is mounted on the thin film heater 123 to serve to uniformly supply power supplied from the outside to the thin film heater 123. Here, it is preferable to install the electrode 125 so that the entire surface of the thin film heater 123 is evenly grounded so as to have a uniform (constant) current density on all surfaces of the thin film heater 123.

In particular, the width (thickness) of the electrode 125 may be greater than or equal to the width (thickness) of the thin film heater 123 in order to have a uniform current density in all surfaces of the thin film heater 123.

11 to 12 are exemplary views showing embodiments of various arrangement patterns of the electrode and the thin film heater according to the present invention. As shown in the drawing, various shapes of the electrode 125 are formed such that a plurality of heat generating thin film cells are formed. It can be formed into a pattern having a position, shape, size and number.

The reason for forming the thin film cell is to prevent the ground parts of the electrode 125 and the thin film heater 123 from being powered from being destroyed due to overheating when a lot of power is supplied at the same time, while dividing the heating region into several parts. This is to control the partial heat generated by controlling the resistance value of each region.

The material forming the electrode 125 as described above ensures stability to the temperature of the electrode 125 when heat is generated in the thin film heater 123, prevents an increase in resistance due to oxidation, and the thin film heater 123. Metals such as Al, Au, W, Pt, Ag, Ta, Mo, Ti, H, Cu, etc. to prevent desorption from) may be used.

Finally, the protective layer 127 is mounted on the outer surfaces of the thin film heater 123 and the metal pad 125 to electrically / chemically protect the thin film heater 123 and the metal pad 125 from the external environment. As the material of the protective layer 127, SiNx, SiOx, AlOx, Polymer, Polyimide, Teflon, etc. may be used, and the thickness of the protective layer 127 is an optimal thickness capable of exhibiting thermal conductivity and a protective function. It is determined, and preferably in the range of about 0.1 μm to 20 μm.

The protective layer 127 may be formed in both the thin film heater 123 on which the conductor pattern 124 is formed and the thin film heater 123 in a state where the conductor pattern is not formed.

13 is a schematic view showing the specifications of the specimen for testing the heating means according to the invention, Figure 14 is a graph measuring the temperature change value according to the time displacement in a state in which a constant current (50W) is applied to the specimen of FIG. 15 is a graph illustrating a measurement of a temperature change value according to a displacement of an amount of current applied for a time (10 seconds) defined in the specimen of FIG. 13.

In this case, the temperature values measured through FIGS. 13 to 15 are resistances of the respective components such as the thin film heater 123, the conductor pattern 124, the insulating film 122, the electrode 125, and the guide member 130. It should be noted that different results may be obtained depending on the value, thickness, and material.

As shown in FIG. 14, it can be seen that a saturation characteristic appears at 287 ° C. after a predetermined time when 50 watt power is applied.

As shown in FIG. 15, it can be seen that the surface temperature change which increases for 10 seconds according to the power change has a linear increase characteristic.

The heat generating means 120 according to the present invention as described above, reflecting the design conditions of the product, the resistance value, thickness, material, etc. of each component such as a thin film heater, a conductor pattern, an insulating film, an electrode, a thin film cell, a guide member, etc. Apply differently to reduce surface temperature arrival time and power consumption according to product characteristics to produce optimal product.

FIG. 16 is a cross-sectional view schematically illustrating an internal structure of an image forming apparatus using a thin film heater according to a second exemplary embodiment of the present invention, FIG. 17 is a detailed view of part “B” of FIG. 16, and FIG. 18 is a portion of FIG. "C" part is a detailed view.

As shown in the figure, the second embodiment of the present invention differs in the configuration of the heat generating means 120 and the guide member 130 from the above-described configuration of the first embodiment.

Therefore, the rest of the configuration except for the heat generating means 120 and the guide member 130 and the operation description thereof will be omitted, and the same reference numerals will be used for the same configuration as the first embodiment.

The guide member 130 includes an opposing horizontal surface 131 on which the heating means 120 for heating and fixing the toner of the recording material P is stacked, and at least one end of the left and right ends of the opposing horizontal surface 131. Consists of a wing portion 133 is formed so as to extend, the wing portion 133 serves to preheat the sleeve 140 before entering the opposing horizontal surface (131).

Heating means 120 is provided on the upper and lower surfaces of the opposing horizontal surface 131, respectively.

According to the second embodiment of the present invention as described above, the simultaneous heating by the upper and lower heat generating means 120 is made, thereby shortening the preheating time compared to using only one heating means 120. In addition, high temperature heat generation is possible.

The upper and lower heat generating means 120 may be provided with a separate power supply, respectively, which is to control the current supply to each heat generating means 120 to distribute the load to the heat generating means 120 As having, it is possible to stably drive the heat generating means 120, it is possible to extend its life.

In addition, the heat generating means 120 may be formed on the guide member 130 and the pressure plate 115, respectively, so as to simultaneously heat the upper and lower surfaces of the recording material (P).

The guide member 130 may be a conductive material or a non-conductive material having excellent thermal conductivity. As the conductive material, a metal material such as aluminum, stainless steel, or an alloy of aluminum and stainless steel may be used, and the non-conductive material may be used. Furnace may be a polymer synthetic resin and ceramics.

On the lower side of the guide member 130, a pressurizing driver 110 for conveying the recording material P is installed. The pressurizing driver 110 includes a driving belt 113 and a driving belt 113. It is composed of a pressing plate 115 installed inside to press the upper surface of the belt to the upper guide member 130 side, and the driving wheel 111 formed on either side of the pressing plate 115 to drive the driving belt 113. do.

At this time, the pressing plate 115 is preferably elastically supported by a separate elastic member (compression spring, etc. may be used).

In addition, the pressure plate 115 is a guide blade for guiding the drive belt 113 on the opposite side where the flat plate portion 115a corresponding to the opposite horizontal surface 131 of the guide member 130 and the driving wheel 111 is not formed. Form 115b.

19 is an enlarged cross-sectional view showing a second modification of the heat generating means according to the present invention.

19, an example of simultaneously forming the heating means 120 of the present invention on the upper and lower surfaces of the guide member 130 of the non-conductive material will be described.

As shown in the drawing, the heating means 120 of the present invention has a thin film heater 123 formed on the upper and lower surfaces of the guide member 130 of the non-conductive material, and supplies external power to the surface of the thin film heater 123. The electrode 125 is formed on the upper and lower surfaces in order, and the protective layer 127 of a predetermined thickness is formed on the upper and lower surfaces of the electrode 125 and the thin film heater 123 in order.

That is, the heating means 120 is formed to be symmetrical with respect to the guide member 130.

In this case, a conductor pattern 124 may be further formed to uniformly distribute the power of the electrode 125 over the thin film heater 123. As the conductor pattern 124, various patterns for electrically connecting the electrode 125 and the electrode 125 to the surface of the heat generating means 120 may be used.

In particular, it is preferable to form the thickness of the protective layer 127 to be grounded to the sleeve 140 of the lower surface than the upper surface.

At this time, the material of the guide member 130 of the non-conductive material may be used, such as heat-reinforced plastic, heat-resistant resin, ceramic, glass, ceramics, stone, etc. that can withstand at least 250 ℃ or more.

Of course, a conductive material may be used for the guide member 130. In this case, the insulating film 122 is formed first as shown in FIG. 6 without directly depositing the thin film heater 123 on the surface of the guide member 130. Then, the thin film heater 123 may be deposited on the top.

20 is an enlarged cross-sectional view showing a third modification of the heat generating means according to the present invention.

The heat generating means 120 according to the third modified example as shown in the drawing allows the electrode 125 to be fusion formed first before the thin film heater 123 is deposited on the surface of the non-conductive guide member 130.

The electrode 125 may be fused by a method such as vacuum sintering to apply the electrode 125 in a paste state to the surface of the guide member 130 and to remove the solvent in the vacuum chamber to solidify the paste.

When the electrode 125 is formed using the fusion method as described above, it is possible to prevent the electrode 125 from being burned out and lost due to the overload of the current capacity.

In this case, in order to form the electrode 125 and to supply power to the thin film heater 123 evenly, a conductor pattern 124 connecting the electrode 125 and the electrode 125 may be formed. .

The thin film heater 123 is deposited on the electrode 125 and the conductor pattern 124, and the thin film heater 123 covers the electrode 125 and the conductor pattern 124. do.

In addition, a protective layer 127 having a predetermined thickness is formed on the surface of the thin film heater 123 to be protected from the external environment.

In this case, the guide member 130 may be used as a non-conductive material, heat-reinforced plastic, heat-resistant resin, ceramic, glass, ceramics, stone, etc. that can withstand at least 250 ℃ or more.

Of course, the guide member 130 may be used as a conductive material. In this case, the insulating film 122 as shown in FIG. 6 is formed first without directly depositing the thin film heater 123 on the surface of the guide member 130. Then, the thin film heater 123 may be deposited on the top.

In addition, the heating means 120 according to the third modification as described above may be installed on the upper and lower surfaces of the guide member 130, respectively.

FIG. 21 is a cross-sectional view schematically illustrating an internal structure of an image forming apparatus using a thin film heater according to a third embodiment of the present invention. FIG. 22 is a cross-sectional view of the image forming apparatus using a thin film heater according to a fourth embodiment of the present invention. It is sectional drawing which shows the internal structure schematically.

In the third embodiment of the present invention as shown in the drawing, the driving wheels 111 are respectively provided at both lower sides of the pressure plate 115, and in the fourth embodiment, the driving wheels 111 are disposed at the lower center of the pressure plate 115. Only one is being installed.

The pressure plate 115 as shown in FIG. 21 or 22 is driven to the flat plate portion 115a corresponding to the opposing horizontal surface 131 of the guide member 130 and the left and right ends of the flat plate portion 115a, respectively. Guide vane 115b for guiding the belt 113 is configured to extend.

At this time, the pressing plate 115 may be coupled to the support (115c) for strength reinforcement, it is also possible to combine the support (115c) with the guide member 130 to make the strength reinforcement.

Here, the position variable stage 160 for varying the position of at least one of the pressure plate 115 or the guide member 130 may be installed on one side of the pressure plate 115, wherein the position variable stage 160 generates heat. The preheating pressing plate 115 of the means 120 is moved to space the predetermined distance between the guide member 130 and the pressing plate 115.

Position variable stage 160 as described above may be used in a variety of mechanisms, such as a solenoid valve, a cam structure, as well as a pneumatic cylinder.

This is to prevent the heat from the initial heating preheating means 120 being conducted through the pressure plate 115 to increase the preheating time.

Accordingly, the position variable stage 160 is spaced apart from the initial guide member 130 and the pressure plate 115 of the image forming apparatus by more than a predetermined interval, and measures the heating temperature of the heating means 120 to set the temperature. When reaching (eg, 180 ° C.), the pressure plate 115 is pressed against the guide member 130.

Referring to the operation of the present invention having the configuration as described above are as follows.

First, power is applied to the image forming apparatus of the present invention, and the supply power is input to the electrode 125 of the heat generating means 120, and is again uniformly supplied to the entire area of the thin film heater 123 so that self heating is generated. Will be done.

Due to the heat of the thin film heater 123, the opposing horizontal surface 131 and the wing 133 of the guide member 130 is heated, the heated guide member 130 covers the sleeve 140 surrounding the outer surface The thermosetting resin to be formed is heated.

At this time, the ground area of the sleeve 140 and the guide member 130 is made over the entire opposite horizontal surface 131 and the wing 133, it is possible to ensure a sufficient heating area and heating time.

While the sleeve 140 and the pressure driving unit 110 grounded are rotated, the recording material P is supplied and transported therebetween.

At this time, the toner T powder sprinkled on the upper surface of the recording material P passes through the opposing horizontal surface 131 of the guide member 130 and is discharged from the image forming apparatus.

As described above, the thin film heater 123 is rapidly heat generated even by a low power external power source, which is more than 140 degrees Celsius in 20 seconds when the 500W power is applied (depending on the size of the guide member). May be changed), and thus has the advantage of shortening the waiting time required for preheating.

As mentioned above, although the present invention has been described by way of examples, the embodiments of the present invention are merely examples and should not be construed as limiting the scope of the present invention. Those skilled in the art to which the present invention pertains may modify or alter the present invention in various forms within the principles and scope described in the claims herein.

In the present invention as described above, the heating means including the thin film heater is formed on the upper surface of the guide member to utilize the entire surface of the guide member as a heating plate, and at the same time the structure of the pressurizing drive portion is made of a conveyor drive form the heating area and heating time. Passion deposition process is performed in this sufficiently secured state has the effect that high-speed output is possible.

In addition, the present invention provides a pressurized drive unit in the form of a conveyor, which allows the device to be slimmed down and at the same time, the working standby time (preheating time) is shortened due to the characteristics of high-speed heat generation using a thin film heater.

In the present invention, when the heating means are formed on the guide member at the same time, when the heating means are formed at the same time, it is possible to significantly increase the heat generation temperature, shorten the temperature increase time, and supply the respective heat generating means, when only one heating means is used. By adjusting the amount of current, it is possible to prevent the problem caused by overload to extend the life of the heating means.

Claims (30)

A pressure drive unit 110 having a drive belt 113 of a conveyor drive type; A guide member 130 installed on the pressure driving unit 110 and having an opposite horizontal surface 131 forming a parallel plane with the horizontal transfer unit 113a of the driving belt 113; A heat generating means (120) laminated on an outer surface of the opposite horizontal surface (131) of the guide member (130) to provide heat generation using the thin film heater (123); And It is mounted in a form surrounding the outer surface of the guide member 130 receives the heat, and includes a sleeve 140 is frictionally driven in a state facing the horizontal conveying portion (113a) of the pressure driving unit 110, the horizontal conveying portion An electrophotographic image forming apparatus, characterized in that the recording material (P) is introduced between the friction surface between the (113a) and the sleeve to transfer and heat fix. The method of claim 1, The heating means 120, A thin film heater 123 which is thin film deposited on the outer surface of the guide member 130 and is instantaneously generated by receiving power; And An electrode 125 forming an electrical connection pattern to supply uniform power to the thin film heater 123; Electrophotographic image forming apparatus comprising a. The method of claim 1, The heating means 120, An insulating film 122 deposited on an outer surface of the guide member 130 to provide electrical insulation and thermal conductivity; A thin film heater 123 having a thin film deposited on an outer surface of the insulating film 122 and receiving instantaneous heat generation; And An electrode 125 forming an electrical connection pattern to supply uniform power to the thin film heater 123; Electrophotographic image forming apparatus comprising a. The method of claim 1, The heating means 120, An electrode 125 forming an electrical connection pattern so that uniform power is supplied to an outer surface of the guide member 130; And A thin film heater 123 which is thin film deposited on the upper surface of the electrode 125 and the guide member 130 and is instantaneously generated by receiving power; Electrophotographic image forming apparatus comprising a. The method of claim 1, The heating means 120, the insulating film 122 is deposited on the outer surface of the guide member 130 to provide electrical insulation and thermal conductivity; An electrode 125 forming an electrical connection pattern such that a uniform power is supplied to an outer surface of the insulating film 122; And A thin film heater 123 which is thin film deposited on the upper surface of the electrode 125 and the guide member 130 and is instantaneously generated by receiving power; Electrophotographic imaging system comprising a. The method according to claim 4 or 5, The electrode 125 is an electrophotographic image forming apparatus, characterized in that formed by fusion or vacuum sintering. The method according to any one of claims 1 to 5, The pressure drive unit 110, A pressure plate 115 installed to face the lower surface of the guide member 130; A driving belt 113 installed to surround an outer circumference of the pressing plate 115; And A drive wheel 111 for power transmission to the drive belt 113; Electrophotographic image forming apparatus comprising a. The method of claim 7, wherein The driving wheel (111) is an electrophotographic image forming apparatus, characterized in that installed on each of the left and right sides of the pressure plate (115). The method of claim 7, wherein The driving wheel (111) is an electrophotographic image forming apparatus, characterized in that is installed only on one side of the left and right of the pressure plate (115). The method of claim 9, The pressure plate 115 is provided with a driving belt 113 on the opposite side where the plate portion 115a corresponding to the opposing horizontal surface 131 of the guide member 130 and the driving wheel 111 of the plate portion 115a are not formed. An electrophotographic image forming apparatus, wherein a guide vane 115b for guiding is formed to extend. The method of claim 7, wherein An electrophotographic image forming apparatus, wherein the driving wheels 111 are respectively provided on both lower sides of the pressing plate 115. The method of claim 7, wherein Electrophoretic image forming apparatus, characterized in that only one driving wheel 111 is installed in the lower center of the pressure plate (115). The method of claim 7, wherein The pressure plate 115 may include a flat plate portion 115a corresponding to the opposing horizontal surface 131 of the guide member 130 and guide vanes for guiding the driving belt 113 on both left and right ends of the flat plate 115a, respectively. 115b), wherein the electrophotographic image forming apparatus is extended. The method of claim 13, Electrophotographic image forming apparatus characterized in that for coupling the support plate (115c) for strength reinforcement to the pressure plate (115). The method of claim 7, wherein An electrophotographic image forming apparatus characterized in that the heat generating means 120 is formed on the guide member 130 and the pressure plate 115, respectively. The method according to any one of claims 1 to 5, The guide member 130 is formed so as to extend to at least one of the left and right ends of the opposing horizontal surface 131 and the front and rear ends of the opposing horizontal surface 131 by the heat generating means 120 stacked on top An electrophotographic image forming apparatus, comprising: a wing 133. The method of claim 16, Electrophotographic image forming apparatus, characterized in that for coupling the support (115c) for strength reinforcement to the guide member (130). The method according to claim 2 or 4, The guide member 130 is a non-conductive material, electrophotographic image forming apparatus, characterized in that it is produced using any one of heat-reinforced plastic, heat-resistant resin, ceramic, glass, ceramics, stone. The method according to claim 3 or 5, The guide member (130) is an electrophotographic image forming apparatus, characterized in that it is produced using at least one of aluminum, stainless steel or a conductive metal containing an alloy of aluminum and stainless steel excellent in thermal conductivity. The method according to any one of claims 1 to 5, The heat generating means 120 is an electrophotographic image forming apparatus, characterized in that formed on the upper surface of the guide member (130). The method according to any one of claims 1 to 5, The heat generating means 120 is an electrophotographic image forming apparatus, characterized in that formed on the lower surface of the guide member (130). The method according to any one of claims 1 to 5, The heat generating means 120 is an electrophotographic image forming apparatus, characterized in that formed on the upper and lower surfaces of the guide member 130 at the same time. The method of claim 7, wherein On one side of the pressure plate 115 is installed a position variable stage 160 for varying the position of at least one of the pressure plate 115 or the guide member 130, using the position variable stage 160 to generate heat means ( The preheating initial guide member 130 of the 120 and the pressure plate 115 is maintained in a state spaced apart a predetermined interval electrophotographic image forming apparatus, characterized in that. The method according to any one of claims 2 to 5, An electrophotographic image forming apparatus characterized by forming a conductor pattern (124) between the electrode (125) and the electrode (125) so that uniform power is supplied to the entire surface of the thin film heater (123). The method according to any one of claims 2 to 5, The thin film heater 123 is a combination of two-component metal-nitride or metal-silicide in which a single metal or a two-component metal alloy or a metal-nitride is combined. An electrophotographic image forming apparatus comprising any one of component metal silicides. The method according to any one of claims 2 to 5, The electrode 125 is set such that its width is greater than or equal to the width of the thin film heater so that current density can be uniformly supplied to the thin film heater 123, and is stable to temperature during heat generation and is resistant to oxidation. An electrophotographic image forming apparatus comprising any one of Al or Au or W or Pt or Ag or Ta or Mo or Ti to prevent increase and physical exfoliation. The method according to claim 3 or 5, The insulating film 122 is formed of a natural or thermosetting ceramic, it is formed using a thick film coating method, characterized in that the electrophotographic image forming apparatus. The method according to claim 3 or 5, The insulating film 122 may be formed by oxidizing the surface of the guide member 130 with an arc or a polymer insulating film formed by coating a polymer on the surface of the guide member 130, or the oxide insulating film and the polymer insulating film on the surface of the guide member. An electrophotographic image forming apparatus, characterized in that any one of the formed double insulating films. The method of claim 28, The oxide insulating film is any one of metal oxides including aluminum oxide or beryllium oxide or titanium oxide, and the polymer of the polymer insulating film is polyimide or polyamide or teflon or paint. Or silver-ston or tefzel-s, epoxy, or rubber. The method according to any one of claims 1 to 5, An electrophotographic image forming apparatus, characterized in that the protective layer 127 is coated to a predetermined thickness so that the surface of the heat generating means 120 is protected from the external environment.

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