JPH0651665A - Fixing device - Google Patents

Abstract

PURPOSE:To prevent a change in abrasion and resistance, to improve the durability and reliability of a fixing device, and further, to prevent an excessive electric noise from being generated by connecting the receiving part of a rotary heat generating roller and a transmission part whose position is fixed by means of a freely deformable wiring member. CONSTITUTION:On the heat generating roller 14, a pair of electrodes 41 and 42 of the receiving part 40 is formed concentrically on an end surface opposite to a main body frame 13 and a pair of coil springs 43 and 44 fixedly connected to these electrodes 41 and 42, respectively is fitted to a movable disk 45 as a wiring member. Then, a rotating/driving means rotating/driving the heat generating roller 14 forward is composed of a driving motor and a gear train. A connection/disconnection means 50 connecting the transmission part 28 and the coil springs 43 and 44 fixedly in position at the time of operating the rotating/driving means and freely movably at the time of stopping, is composed of a fixing disk 17, electrode plates 26 and 27, a solenoid 29, the coil springs 43 and 44, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device used in an electrophotographic apparatus.

[0002]

2. Description of the Related Art The fixing method of an image forming apparatus is classified into three methods of heat fixing, pressure fixing and solvent fixing, and heat fixing is used in an electrophotographic apparatus. A fixing device that performs such thermal fixing has, for example, a structure in which a heat roller and a pressure roller that are opposed to each other via a paper transport path are rotatably supported and are pressed against each other by a spring or the like. The toner transferred to the printing paper is heated and melted by the heat generated by the heat generating roller, and pressure is applied when the toner is conveyed between the rollers. By doing so, in this fixing device, the melted toner is fixed on the printing paper by applying pressure, and the heating roller heats and conveys the printing paper at the same time. .

Here, in such a fixing device, generally, the heating roller has a structure in which a shaft-shaped heating resistor is arranged in a cylindrical metal roller, but this has low thermal efficiency. For this reason, it is difficult to save power and improve responsiveness. Therefore, a surface heating type fixing device in which the surface of the heating roller is formed of a heating resistor is currently proposed. In this surface heating type fixing device, since the surface of the heating roller is directly heated, the thermal efficiency is good, and it is possible to contribute to power saving and improvement in responsiveness.

Therefore, as a conventional example of such a surface heating type fixing device, a fixing device disclosed in Japanese Patent Laid-Open No. 55-164860 will be described with reference to FIG. First, in this fixing device 1, a pair of electrodes 2 and 3 of a power receiving unit are provided on the outer peripheral surfaces of both ends of a surface heating roller 4 so as to be rotatably supported between main body frames 5 and 6 so that a sheet conveying path is formed. The pair of energizing brushes 7 and 8 of the power transmitting section, which are connected to the main body power source (not shown), are elastically attached to the inner surfaces of the main body frames 5 and 6 by springs 9 and 10, respectively. The surface heat generating roller 4 is in contact with the power receiving portions 2 and 3, respectively.

In such a structure, the fixing device 1
Then, since the energizing brushes 7 and 8 of the main body frames 5 and 6 are in contact with the electrodes 2 and 3 on the outer peripheral surface of the surface heating roller 4 by the elastic force of the springs 9 and 10, the rotating surface heating roller 4 is The drive power of the main body power supply is supplied. Therefore, the surface heating roller 4 generates heat due to this driving power, so that the toner on the printing paper sequentially conveyed by the rotation of the surface heating roller 4 is heated and fixed.

[0006]

In the fixing device 1 described above, the electrodes 2 and 3 on the outer peripheral surface of the rotating surface heating roller 4 are provided.
The energizing brushes 7 and 8 of the body frames 5 and 6 are elastically brought into contact with each other to maintain the conductive state.

However, in this case, the current-carrying brushes 7 and 8 of the main body frames 5 and 6 rub against the electrodes 2 and 3 of the surface heating roller 4, and the abrasion and the change in resistance are remarkable, so that the fixing device 1 is durable. Reliability and reliability have declined. That is,
In the surface heating type fixing device 1 in which the heating resistor of the surface heating roller 4 rotates, the electrodes 2 and 3 of the surface heating roller 4 and the energizing brushes 7 and 8 of the body frames 5 and 6 move relatively, The above-mentioned problems are inevitably occurring.

Further, in such a fixing device 1, when the energizing brushes 7 and 8 to which a large amount of electric power is applied rub against the electrodes 2 and 3 of the surface heating roller 4, excessive electric noise is generated. Practicality is reduced by hindering image formation of photographic devices.

[0009]

The invention according to claim 1 is
A heat generating roller provided with an electric power receiving portion on the outer surface is rotatably rotatably supported and arranged on the paper conveyance path, and a power transmitting portion connected to the main body power source is fixedly provided in the vicinity of the heat generating roller. The section and the power transmission section were connected by a deformable wiring member.

According to a second aspect of the invention, in the first aspect of the invention, a wiring member is fixedly connected to the power transmitting section and the power receiving section, and the heat roller is driven to rotate in the forward direction at the same rotational speed. However, the rotation driving means for driving the rotation in the opposite direction is provided.

According to a third aspect of the present invention, in the first aspect of the present invention, a wiring member that is deformable and elastically restored is provided, and rotation driving means that rotationally drives the heat generating roller at least in the forward direction is provided. At least one of the section and the power receiving section and the wiring member are connected to and fixed to each other when the rotation driving means is operating, and are connected and separated so as to be movable when stopped.

According to a fourth aspect of the present invention, in the third aspect of the invention, a connecting / separating means for connecting at least one of the power transmitting section and the power receiving section and the wiring member in a positionally immovable manner by a magnetic force and making it movable. Was set up.

According to a fifth aspect of the invention, in the invention according to the first, third or fourth aspect, at least one of the power transmitting section and the power receiving section and the wiring member are connected to the main body in a state where the connecting / separating means is fixedly connected. An energization control means is provided for turning off the power supply and the heat generating roller when the device is movable by setting the conduction between the power supply roller and the heating roller.

The invention according to claim 6 is the same as claims 1, 2 and
In the invention described in 3, 4, or 5, two power transmitting units, two power receiving units, and two wiring members are arranged in the vicinity of both ends of the heat generating roller.

According to a seventh aspect of the present invention, in the sixth aspect of the invention, two connecting / separating means having alternating operation timings are arranged in the vicinity of both ends of the heat generating roller.

The invention according to claim 8 is the same as claim 1,
In the invention described in 3, 4, 5, 6 or 7, the wiring member is formed of a coil spring.

[0017]

Since the power receiving portion of the rotating heat generating roller and the power transmitting portion whose position does not move can be fixedly connected by the wiring member,
It is possible to prevent the abrasion and the change of resistance and contribute to the improvement of the durability and reliability of the fixing device. Moreover, since it does not generate excessive electric noise like a current-carrying brush, it has good practicability. is there.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the invention described in claims 1, 3, 5 and 8 will be described with reference to FIGS. First, in the fixing device 11, as shown in FIG.
The surface heating roller 14 and the pressure roller 15 which are rotatably supported between the rollers 2 and 13 are pressed against each other with a predetermined nip amount through the sheet conveying path 16. A rotation driving means (not shown) is connected to at least one side.

In the fixing device 11, as shown in FIG. 2, four through holes 18 to 21 are formed in the fixed disk 17 mounted on the inner surface of the one body frame 13. As illustrated in FIG. 3, these through holes 18 to 21 are arranged so that two inside holes and two outside holes are orthogonal to each other. Then, electrode projections 22 to 25, which are respectively press-fitted into and retracted from the through holes 18 to 21, are individually formed at the tips of the two Y-shaped electrode plates 26 and 27. Plate 26,
The end 27 is fixed to the fixed disk 17 at the end and is elastically bendable. By doing so, these electrode plates 26, 27 serve as a pair of electrodes of the power transmission section 28 fixedly positioned in the vicinity of the surface heating roller 14, and via the switching circuit serving as the energization control means. Is connected to the main body power supply (both not shown).

Further, in this fixing device 11, as shown in FIG. 2, a disc-shaped support frame 31 is attached to a slidable rod 30 of a solenoid 29 fixed on the outer surface of the main body frame 13. And four pressing pins 32 to 3 protruding from the inner surface of the support frame 31.
Reference numeral 5 is opposed to the distal end portions of the electrode plates 26 and 27 through the through holes 36 to 39 of the main body frame 13 so as to be freely contactable and separable.

Further, in this fixing device 11, the surface heating roller 14 has a predetermined heating resistor formed on the outer peripheral surface of the roller made of an insulating material by plating, thick film printing or the like, and the upper surface thereof is insulated from the insulating material. It has a structure in which a protective film is formed of tetrafluoroethylene resin or the like having good moldability. Therefore, the surface heating roller 14 having such a structure has a pair of electrodes 4 of the power receiving unit 40 on the end surface facing the body frame 13.
1, 42 are concentrically formed, and these electrodes 4
A pair of coil springs 43 and 44 fixedly connected to the motors 1 and 42 are mounted on one movable disk 45 as one wiring member. On the outer side surface of the movable disk 45, four electrode projections 46 to 49, which are electrically connected to the coil springs 43 and 44, are provided so as to project from the coil springs 43 and 44. The movable disk 45 is connected to the coil springs 43 and 44. The electrode projections 46 to 49 are urged outward by the elastic force of
Are press-fitted into and retracted into the four through holes 18 to 21 of the fixed disk 17 of the main body frame 13.

Therefore, in the fixing device 11 of this embodiment, the rotation driving means for rotating the heat roller in the forward direction is formed by a drive motor and a gear train (both not shown). The connection contacting / separating means 50 that connects the power transmission unit 28 and the coil springs 43 and 44 to each other in a stationary state during operation and is movable when stopped includes the fixed disk 17, the electrode plates 26 and 27, and the solenoid 2.
9. The coil springs 43 and 44 are formed. Further, in the fixing device 11 of the present embodiment, the conduction between the main body power supply and the surface heating roller 14 is turned on in the state where the power transmission unit 28 and the coil springs 43 and 44 are fixedly connected to each other by the connecting and separating means 50. An energization control means for turning off the movable state is formed by a switching circuit or the like.

Further, in the fixing device 11, as shown in FIG. 4, the paper conveying path 16 extending between the rollers 14 and 15 has a pair of guide plates 51 and 52 facing each other from above and below.
The reflective photo sensor 53 is provided on the upper guide plate 51 in this case.

In such a structure, the fixing device 1
1 is formed as a part of an electrophotographic apparatus such as a laser printer or a copying machine, and is heated by the surface heating roller 14 when the toner transferred onto the printing paper 54 by the electrophotographic method is pressed between the rollers 14 and 15. Then, the toner on the printing paper 54 is melted and fixed.

More specifically, in the fixing device 11, for example, when the photo sensor 53 detects the printing paper 54,
Since the energization of the solenoid 29, the rotation driving means and the electrode plates 26 and 27 is sequentially started, the rod 30 of the solenoid 29 is first retracted so that the pressing pins 32 to 35 cause the electrode plate 2 to move.
Move away from 6, 27. Therefore, in this state, the driving force of the drive motor causes the rollers 14 and 15 to rotate,
As illustrated in FIG. 2A, this surface heating roller 14
Movable disk 4 connected to coil springs 43 and 44 at
5, the electrode projections 46 to 49 are formed on the fixed disk 17 through hole 18
To 21 to fit the electrode projections 22 to 2 of the electrode plates 26 and 27.
5 will be conducted. Therefore, this electrode plate 26, 2
The drive power transmitted from the electrode projections 22 to 25 of FIG. 7 to the electrode projections 46 to 49 by the timing control of the energization control means is transmitted to the surface heating roller 14 by the coil springs 43 and 44, so that the surface heating roller 14 generates heat. In this state, the toner rotates on the pressure roller 15 to fix the toner on the printing paper 54.

At this time, in the fixing device 11, the electrode projections 46 to 49 directly connected to the surface heating roller 14 and the electrode plate 2 are connected.
6 and 27 are electrically connected to the electrode projections 22 to 25 in a relatively immovable state. As in the fixing device 1 described above as a conventional example, the current-carrying brushes 7 and 8 are used to connect the electrodes 2 of the surface heating roller 4 to the electrodes 2.
Since it is not necessary to rub 3, the abrasion and the change in resistance are prevented, the durability and the reliability are good, and the electric brushes 7 and 8 do not generate excessive electric noise. In addition, the prevention of the image formation of the electrophotographic apparatus and the like are prevented, and the practicability is good. Furthermore, this fixing device 11
In the state where the power transmission unit 28 and the coil springs 43 and 44 are fixedly connected to each other, the energization control unit turns on the energization to the electrode plates 26 and 27, and the energization control unit turns it off. Therefore, the electrode protrusion 22
.About.25 and 46 to 49 are not contacted and separated while the driving power is being supplied. For this reason, in this fixing device 11, the electric field corrosion of the electrode protrusions 22 to 25 and 46 to 49 is prevented, the durability is good, and the unnecessary load of the main body power supply, wiring, etc. is reduced.

In the fixing device 11, since the coil springs 43 and 44 are sequentially wound during the execution of the fixing operation as described above, when the fixing operation for one printing paper 54 is completed, the solenoid 29 is operated. Of electricity is stopped, the rod 30 is projected, and the electrode plates 2 are pressed by the pressing pins 32 to 35.
6, 27 are pressed to fix the electrode protrusions 22 to 25 to the fixed disk 17
Are press-fitted into the through holes 18-21. By doing so, as shown in FIG. 2B, these through holes 18 are formed.
The electrode projections 46 to 49 fitted in the ˜21 are discharged to the inner surface of the fixed disk 17 by the electrode projections 46 to 49, and the through holes 18 to 21 and the electrode projections 46 to 49 are formed on the fixed disk 17. Since the movable disc 45 held by the fitting is rotatable, the coil springs 43 and 44 restore the initial state by rotating the movable disc 45 by its own elastic force.

In the fixing device 11 of the present embodiment, the coil springs 43 and 44 which elastically restore as the deformable wiring member are used as in the invention of claim 3.
By connecting the coil springs 43, 44 and the power transmission unit 28 in a positionally fixed manner when the surface heating roller 14 rotates, and making the coil spring 4 movable when stopped.
Although it has been illustrated that the elastic force of 3,44 is restored by itself, the present invention is not limited to the above-mentioned form. For example, as in the second aspect of the invention, the surface heat generating roller 14 is formed by fixedly connecting the power transmitting unit and the power receiving unit with a wiring member such as an FPC (Flexible Printed Circuit) that is not elastic and can be deformed. It is also possible to implement a fixing device (not shown) or the like in which a rotation driving unit that drives the same in the forward direction and then in the reverse direction by the same number of revolutions is formed by a drive motor, a control circuit, or the like. By doing so, in this fixing device, for example, the wiring member is restored by the driving force of the rotation driving means each time the fixing process of one printing sheet is completed, and the wiring member is connected to the power transmission unit. Since the power receiving unit can be fixedly connected to the power receiving unit, wear and resistance change are completely prevented, and durability and reliability are extremely good.

Further, in the fixing device 11 of the present embodiment, each one power transmitting portion 28, power receiving portion 40 and coil spring 4 are provided.
3 and 44 are arranged in the vicinity of one end of the surface heating roller 14, and for example, the fixing operation is temporarily stopped and the coil springs 43 and 44 each time the fixing process of one printing sheet 54 is completed. However, the present invention is not limited to the above format. For example, as in the inventions according to claims 6 and 7, two power transmission units, two power reception units, and two wiring members are arranged near each end of the heat roller, and the two operation timings are alternated. It is also possible to implement a fixing device (not shown) or the like in which each of the connecting / separating means is arranged near the both ends of the heat roller. By doing so, in this fixing device, it is possible to restore the other wiring member while the wiring member connecting the one power transmitting unit and the power receiving unit is deformed. It is possible to continuously perform the fixing process on the paper.

Further, as described above, the two power transmitting units, the power receiving units, and the wiring members are arranged in the vicinity of both ends of the heat generating roller, and the driving power is simultaneously transmitted from the both ends to the heat generating roller. It is also possible to improve the rising speed of the heating operation. Further, it is also possible to dispose a pair of electrodes of the power transmission unit and the power reception unit separately on both sides of the heat generating roller, and to provide the connecting and separating means only at one end of this heat generating roller. Further, in this embodiment, the surface heating type fixing device 1 is used.
However, the present invention is not limited to the above-described type, and can be applied to various fixing devices in which a heat generating roller rotates.

Next, an embodiment of the invention described in claims 1, 3, 4, 5, and 8 will be described with reference to FIG. The same parts as those of the fixing device 11 described above are designated by the same names and reference numerals, and description thereof will be omitted. First, in the fixing device 55, the pair of fixed electrodes 57 and 58 of the power transmission section 56 are formed in an annular shape and are arranged concentrically via a spacer 59 made of an insulating material such as plastic. 58
Since the coil 60 is provided in the gap, it also functions as a yoke of the electromagnetic magnet.

Further, in the fixing device 55, the surface heating roller 14 has a pair of electrodes 41 and 42 of the power receiving portion 40 formed concentrically on the end surface facing the main body frame 13, and these electrodes 41 and 42 are formed. Coil springs 43 and 44, which are wiring members fixedly connected to, are commonly attached to one movable disk 61. Here, the movable disk 61 has a structure in which annular movable electrodes 62 and 63 individually connected to the coil springs 43 and 44 are concentrically arranged and integrally joined by a spacer 64 made of an insulating material such as plastic. The coil 60 and the like form connection and separation means for detachably connecting the movable electrodes 62 and 63 of the movable disk 61 to the fixed electrodes 57 and 58 by magnetic attraction.

In the fixing device 55, the rotation driving means (not shown) for rotatably driving the surface heating roller 14 is formed by a drive motor and a gear train, and when the rotation driving means is in operation, the power transmission section is provided. 56 and coil spring 4
The connecting / separating means 50, which connects 3 and 44 immovably and is movable when stopped, includes a solenoid 29 and a fixed disk 1.
7, electrode plates 26 and 27, coil springs 43 and 44, and the like. Further, in the fixing device 55 of the present embodiment, when the power transmission unit 56 and the coil springs 43 and 44 are fixedly connected to each other, the main body power source and the surface heating roller 14 are turned on and moved. An energization control means for turning off in a free state is formed by a switching circuit or the like.

In such a structure, the fixing device 5
5 is formed as a part of an electrophotographic apparatus such as a laser printer or a copying machine, and is heated by the surface heating roller 14 when the toner transferred onto the printing paper 54 by the electrophotographic method is pressed between the rollers 14 and 15. Then, the toner on the printing paper 54 is melted and fixed. At this time, in the fixing device 55, the movable electrode 6 of the movable disk 61 is attached to the fixed electrodes 57 and 58 by the magnetic attractive force of the coil 60.
The surface heat generation roller 14 is configured to generate heat by transmitting drive power to the surface heat generation roller 14 as a result of the adsorption of 2, 63 and conduction.

By doing so, the fixing device 55
Then, the movable electrode 62 directly connected to the surface heating roller 14,
63 and the fixed electrodes 57, 58 are electrically connected in a relatively immovable state, and the electrodes 2, 3 of the surface heating roller 4 are connected by the energizing brushes 7, 8 as in the fixing device 1 described above as a conventional example.
Since it is not necessary to rub against, the abrasion and the change in resistance are prevented, and the durability and reliability are good. Further, in the fixing device 55, the fixed electrodes 57 and 58 directly attract the movable electrodes 62 and 63 by the magnetic attractive force of the coil 60, so that the structure is extremely simple and the size and weight of the electrophotographic apparatus are small. It can contribute to the improvement of productivity and productivity.

In the fixing device 55, the coil springs 43 and 44 are sequentially wound while the above-described fixing operation is being performed, so when the fixing operation for one print sheet 54 is completed, the coil 60 is moved to the coil 60. To stop the connection between the fixed electrodes 57 and 58 and the movable electrodes 62 and 63, and the coil springs 43 and 44 restore the initial state by rotating the movable disk 61 by its own elastic force. become.

In the fixing devices 11 and 55 described above,
Solenoid 29 and coil 6 as a drive source of the connecting and separating means
Although it has been illustrated that 0 is used, various driving sources can be used.

[0038]

According to the present invention, the heat generating roller having the power receiving portion on the outer surface is rotatably supported and arranged on the sheet conveying path, and the power transmitting portion connected to the main body power source is connected to the heat generating roller. Is fixedly provided in the vicinity of the heat generating roller, and the power receiving section of the heat generating roller and the power transmitting section are connected by a deformable wiring member, so that the wiring member connects the power receiving section of the rotating heat generating roller and the positionless power transmitting section. Since it can be fixedly connected,
It is possible to prevent the abrasion and the change of resistance and contribute to the improvement of the durability and reliability of the fixing device. Moreover, since it does not generate excessive electric noise like a current-carrying brush, it has good practicability. It has certain effects.

According to a second aspect of the present invention, in the first aspect of the invention, the wiring members are fixedly connected to the power transmitting section and the power receiving section, and the heat roller is driven to rotate in the forward direction by the same number of revolutions. By providing the rotation driving means for rotationally driving in the opposite direction, it is possible to completely and fixedly connect the power receiving portion of the heat generating roller in which the wiring member rotates and the power transmitting portion whose position does not move, so that wear and resistance thereof are prevented. It is possible to prevent the change of the above and contribute to the improvement of the durability and reliability of the fixing device.

According to a third aspect of the present invention, in the first aspect of the present invention, a wiring member that is deformable and resiliently restored is provided, and rotation driving means that rotationally drives the heat generating roller at least in the forward direction is provided. Section and the power receiving section and the wiring member are provided with connection and separation means for connecting the wiring member to a fixed position when the rotation drive means is operating and being movable when the rotation driving means is stopped. Since the power receiving portion of the heat generating roller whose member rotates and the power transmitting portion whose position does not move can be fixedly connected, the abrasion and the change in resistance can be prevented and the durability and the reliability of the fixing device can be improved. It is possible to achieve such effects.

According to a fourth aspect of the present invention, in the invention according to the third aspect, a connecting / separating means for connecting at least one of the power transmitting section and the power receiving section and the wiring member in a positionally immovable manner by a magnetic force and making it movable. By providing the above, the connecting / separating means can be realized with a simple structure, and it is possible to contribute to reduction in size and weight of the fixing device and improvement in productivity.

According to a fifth aspect of the invention, in the invention of the first, third or fourth aspect, at least one of the power transmission section and the power reception section and the wiring member are connected to the main body in a state where the connecting / separating means is fixedly connected. By providing an energization control means that turns on the conduction between the power source and the heat roller and turns it off when it is movable, the wiring member is connected to or separated from the power transmission unit or the power reception unit while the driving power is being supplied. Therefore, the electric field corrosion can be prevented and the durability of the fixing device can be improved.

The invention according to claim 6 is the same as claim 1,
In the invention described in 3, 4, or 5, two power transmitting units, two power receiving units, and two wiring members are arranged in the vicinity of both ends of the heat roller, so that driving power is transmitted from the both ends to the heat roller. Therefore, it is possible to supply a large amount of drive power to the heat generating roller to improve the rising speed of the heat generating operation.

According to a seventh aspect of the present invention, in the sixth aspect of the invention, two connecting / separating means having alternating operation timings are arranged in the vicinity of both ends of the heat roller. Since the other wiring member can be restored while the wiring member connecting the power transmission unit and the power receiving unit is deformed, it is possible to perform a fixing process continuously on a large number of printing sheets. It has the effect of being able to do so.

The invention described in claim 8 is the same as in claim 1,
In the invention described in 3, 4, 5, 6 or 7, since the wiring member is formed of a coil spring, the wiring member that elastically restores can be realized with a simple structure. is there.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the invention described in claims 1, 3, 5, and 8.

FIG. 2 is a vertical sectional front view showing an enlarged main part.

FIG. 3 is a side view showing an enlarged main part.

FIG. 4 is a vertical sectional side view showing the entire structure.

FIG. 5 is a vertical sectional front view showing an embodiment of the invention described in claims 1, 3, 4, 5, and 8.

FIG. 6 is a vertical sectional front view showing a conventional example.

[Explanation of symbols]

 11, 55 Fixing device 14 Heat roller 16 Paper transport path 28, 56 Power transmission unit 40 Power reception unit 43, 44 Wiring member 50, 60 Connection / separation means

Claims (8)

[Claims] 1. A heat generating roller having an electric power receiving portion on an outer surface is rotatably supported and arranged on a sheet conveying path, and a power transmitting portion connected to a main body power source is fixedly provided near the heat generating roller. A fixing device in which a power receiving portion of the heat generating roller and the power transmitting portion are connected by a deformable wiring member. 2. A rotation driving means for fixedly connecting a wiring member to the power transmission section and the power reception section, and rotationally driving the heat generation roller in the forward direction and then rotationally driving the same rotation speed in the reverse direction. The fixing device according to claim 1, wherein: 3. A deformable and resiliently recoverable wiring member is provided, rotational driving means is provided for driving the heating roller to rotate at least in the forward direction, and at least one of the power transmitting section and the power receiving section and the wiring member are provided. 2. The fixing device according to claim 1, further comprising a connecting / separating unit that is fixedly connected when the rotation driving unit is operating and is movable when the rotation driving unit is stopped. 4. A connecting / separating means for connecting at least one of the power transmitting section and the power receiving section and the wiring member to each other by a magnetic force so as to be immovable and movable.
The fixing device described. 5. A connection between at least one of the power transmission section and the power reception section and a wiring member is fixedly connected to the connection / separation means, and the connection between the main body power supply and the heat generation roller is in an ON state and is OFF in a movable state. The fixing device according to claim 1, 3 or 4, further comprising an energization control means for setting a state. 6. The power transmitting unit, the power receiving unit, and the wiring member, each of which is two in number, are arranged in the vicinity of both ends of the heat roller, one by one, respectively. Fixing device. 7. The fixing device according to claim 6, wherein two connecting / separating means having alternating operation timings are arranged in the vicinity of both ends of the heat generating roller. 8. The wiring member is formed of a coil spring, as claimed in claim 1, 2, 3, 4, 5, 6 or 7.
The fixing device described.