JP2010032757A - Fixing device and image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent damage and adverse effects due to heat in an electrical contact part used for a fixing process and to reduce the size and space of a fixing device. <P>SOLUTION: Drive force is transmitted at least either to a fixing roller 32 or to a pressure roller 34 by input of drive force from a drive motor or the like from below in the housing 35 of the fixing device 26, via a drive transmission member 41 formed from a drive force transmission mechanism and gear change mechanism, such as a gear, a pulley, or a belt. The drive transmission member 41 is installed in a drive part installation area 42 in the housing 35 of the device. A pressure roller 34 serving as a pressure member and a heating member including a heat roller 31 having a heat source 30, a fixing roller 32, a fixing belt 33, and are installed in a fixing part installation area 43 in the housing 35 of the device. The drive part installation area 42 and fixing part installation area 43 are adjacently set inside the housing 35 of the device with partition. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fixing device that heats and pressurizes a toner image formed on a recording medium and fixes the toner image on the recording medium, and an image forming apparatus equipped with the fixing device.

  2. Description of the Related Art Conventionally, in a fixing device, taking into consideration the replacement workability and jam handling performance associated with the life of a fixing member, it has been the mainstream to adopt a unit form that can be attached and detached independently from the image forming apparatus main body on which the fixing device is mounted. is there.

  Therefore, a drawer connector, which is an electrical contact with the image forming apparatus main body, is disposed in the fixing device in order to supply electric power to an electrical system such as a heater and a temperature detection unit. Usually, the frame surface of the fixing device is covered with a protective cover so that a serviceman and a user do not touch a high-temperature part during replacement work or jamming work.

  FIG. 10 is a cross-sectional view showing a schematic configuration of a conventional fixing device, and FIG. 11 is an external perspective view of the fixing device of FIG.

  In FIG. 10, a fixing device 1 includes a heating roller 3 having a heating source 2 such as a heater inside, a fixing roller 5 that is installed opposite to the heating roller 3 and supports the fixing belt 4 by the heating roller 3, and fixing. A pressure roller 6 is provided in pressure contact with the roller 5 via the fixing belt 4.

  In the fixing device 1, the paper P that is a recording medium on which a toner image is formed in a nip portion N formed between the fixing roller 5 and the pressure roller 6 via the fixing belt 4 heated by the heating roller 3. The toner image is fixed to the paper P by applying heat and pressure to the paper P at the nip portion N.

  The fixing temperature of the fixing belt 4 heated by the heating roller 3 having the heating source 2 is detected by a temperature sensor, and the heating source 2 of the heating roller 3 is controlled by a temperature control means (not shown) based on the detection signal. Thus, the belt surface is maintained at a predetermined temperature.

  Further, as shown in FIGS. 10 and 11, a drawer connector 8, which is an electrical contact for receiving power supply from the mounted apparatus body side, is provided on the side wall of the apparatus housing 7 of the fixing apparatus 1. Yes.

  Recently, it is a mainstream to attach and detach the fixing device 1 perpendicularly to the longitudinal direction of the fixing device 1 (indicated by a black double arrow in the figure) with respect to the main body of the fixing device 1. The drawer connector 8 is generally disposed behind the fixing device 1 (on the left side in FIG. 10). Therefore, the drawer connector 8 is disposed near the heating source 2 of the heating roller 3 that is also provided behind the fixing device 1 and is likely to be hot. Further, the drawer connector 8 is provided so as to protrude from the apparatus housing 7 of the fixing device 1, and there is a demerit that a space for the drawer connector 8 is required (because the heating source 2 is close to the drawer housing 8, the drawer housing 8 is accommodated in the apparatus housing 7. Absent).

  For this reason, as shown in FIG. 12, it is also conceivable to arrange the drawer connector 8 vertically in the device housing 7 at the end portion in the longitudinal direction of the fixing device 1. However, disposing the drawer connector 8 at the side end of the device housing 7 reduces the temperature problem of high temperature, but increases the width of the entire device housing 7 of the fixing device 1.

  Further, since the fixing device 1 becomes high temperature, the device housing 7 is made of metal because of heat resistance, and the drawer connector 8 is generally fixed to the metal device housing 7. Therefore, the heat of the fixing device 1 is directly conducted to the drawer connector 8 and is likely to become high temperature.

Furthermore, various proposals have been made and implemented in order to solve the above-described problems related to the connector in the fixing device (see, for example, Patent Documents 1 and 2).
JP 2004-151223 A JP 2004-109466 A

  As described above, the drawer connector installation structure in the conventional fixing device has various problems. In particular, the electrical contact portions such as the connector portion and the relay connector portion constituting the drawer connector have a heat resistant temperature of about 100 ° C. or less. When the drawer connector is used in a fixing device, heat resistance becomes a problem.

  In addition, the fixing device itself is a heat source, and the ambient temperature in the vicinity of the fixing device is high in the density of the constituent members, which may be about 120 to 130 ° C. It has become.

  An object of the present invention has been made in view of the above-described problem, and a fixing device that can eliminate damage and harmful effects caused by heat in an electrical contact portion for fixing processing, and further achieve downsizing and space saving. An object is to provide an image forming apparatus.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a nip portion is formed by a heating member heated by a heating source and a pressure member that comes into contact with the heating member with a predetermined pressure. In the fixing device for fixing the toner image on the recording medium at the fixing device installation region in which the heating member and the pressure member are installed in the device housing, and the heating member outside the fixing unit installation region And a drive part installation region for installing a drive transmission member for driving at least one of the pressure members, and a resin holding member provided with a connector having a contact point to be electrically connected to the power supply part. This structure is provided in the apparatus housing in the part installation area. With this configuration, a resin holding member is used to hold the connector, and the connector and the holding member generate less heat than the fixing part installation area. By providing the device housing in the drive unit installation area, heat conduction to the connector can be prevented, the influence of heat can be minimized, and the space in the drive unit installation area can be effectively used to save Space can be achieved.

  According to a second aspect of the present invention, in the fixing device according to the first aspect of the present invention, the holding member is integrally formed with a wiring guide path for winding the electric wiring member. Since the member has the wiring guide path portion, it is possible to achieve cost reduction and space saving due to component aggregation.

  According to a third aspect of the present invention, in the fixing device according to the second aspect, the wiring guide path portion is formed in a plurality of stages, and by this configuration, the wiring guide path section is a multi-stage configuration adapted to the connector. As a result, cost reduction and space saving can be achieved by consolidating parts.

  According to a fourth aspect of the present invention, in the fixing device according to the first or second aspect, the holding member is provided with a terminal for distributing and consolidating the electrical wiring members. With this configuration, the holding member is a terminal. Therefore, cost reduction and space saving can be achieved by consolidating parts.

  According to a fifth aspect of the present invention, in the fixing device according to the first aspect, the holding member is provided in the apparatus housing so as to be movable in the connector insertion / removal direction. Since the connector is movable, it can be adjusted as appropriate, so that reliable contact is possible.

  According to a sixth aspect of the present invention, in the fixing device according to the first aspect, the holding member is configured to also serve as a protective cover of the fixing device. With this configuration, the holding member also serves as the protective cover. As a result, cost reduction and space saving can be achieved by consolidating parts.

  According to a seventh aspect of the present invention, there is provided an image forming unit that forms a toner image on a recording medium with a toner developer, and a fixing unit that fixes the toner image on the recording medium conveyed from the image forming unit. An image forming apparatus comprising: a fixing device according to any one of claims 1 to 6 mounted as the fixing unit, and a fixing device having excellent durability and stability can be used with this configuration. As a result, the reliability of the image forming apparatus can be improved, and the size can be reduced by using the image forming apparatus in a fixing device that achieves space saving.

  According to an eighth aspect of the present invention, in the image forming apparatus according to the seventh aspect, the fixing device is detachably installed in the image forming apparatus in a direction perpendicular to the longitudinal direction of the fixing member.

  According to the fixing device of the present invention, a resin holding member is used to hold the connector, and the connector and the holding member are further provided on the device housing in the drive unit installation region that generates less heat than the fixing unit installation region. As a result, heat conduction to the connector can be prevented, the influence of heat can be minimized, and space can be saved by effectively utilizing the space in the drive unit installation area.

  According to the image forming apparatus of the present invention, it is possible to improve the reliability of the image forming apparatus by using the fixing apparatus having excellent durability and stability, and to use the fixing apparatus that achieves space saving. Therefore, the size can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a color laser printer (hereinafter simply referred to as “printer”) which is an embodiment of the image forming apparatus of the present invention.

  In FIG. 1, the printer includes a tandem image forming unit 9 in which four image forming units of yellow, cyan, magenta, and black are arranged side by side. In the tandem image forming unit 9, image forming units 10Y, 10C, 10M, and 10K for respective colors are arranged in order from the left in the drawing. Here, the suffixes Y, C, M, and K of the respective symbols indicate the members for yellow, magenta, cyan, and black, respectively.

  In the tandem image forming unit 9, the image forming units 10Y, 10C, 10M, and 10K are arranged around the drum-shaped photoconductors 11Y, 11C, 11M, and 11K as latent image carriers, and the developing devices 12Y, 12C, and 12K, respectively. M, K, and photoconductor cleaning devices 13Y, C, M, K, and the like are provided. At the top of the printer, toner bottles 14Y, C, M, and K filled with toners of yellow, cyan, magenta, and black are arranged. Each color toner is supplied from the toner bottles 14Y, 14C, 14M, and 14K to the developing devices 12Y, 12C, 12M, and 12K corresponding to each color by a predetermined supply amount through a conveyance path (not shown).

  Further, an optical writing unit 15 as a latent image forming unit is provided below the tandem image forming unit 9. The optical writing unit 15 includes a light source (not shown), a polygon mirror 16, an f-θ lens 17, A reflection mirror 18 is provided, and a latent image is formed while exposing and scanning the surface of each of the photoconductors 11Y, 11C, 11M, and 11K with laser light L based on image data.

  Further, an endless belt-like intermediate transfer belt 19 is provided immediately above the tandem image forming unit 9. The intermediate transfer belt 19 is wound around support rollers 20a and 20b, and one of the support rollers 20a and 20b is a drive roller, and a drive motor (not shown) is connected to the intermediate transfer belt 19 by the drive motor. The belt 19 is driven to rotate in the counterclockwise direction in the figure. Inside the intermediate transfer belt 19, primary transfer devices 21Y, 21C, 21M, and 21K for transferring toner images formed on the photoreceptors 11Y, 11C, 11M, and 11K onto the intermediate transfer belt 19 are provided. ing.

  Further, a secondary transfer roller 22 as a secondary transfer device is provided downstream of the primary transfer devices 21Y, 21C, 21M, and 21K in the driving direction of the intermediate transfer belt 19. On the opposite side of the secondary transfer roller 22 with respect to the intermediate transfer belt 19, the other support roller 20b is disposed.

  In addition, a paper feed conveyance path for paper P, which is a recording medium, is installed from the lower side to the upper side of the tandem image forming unit 9, and a paper feed cassette 23 and a paper feed roller 24 are provided below, and secondary transfer is performed on the side. A registration roller 25 that feeds the paper P in time with the roller 22 is provided.

  Further, a fixing device 26 for fixing the toner image on the paper P is provided on the downstream side in the transport direction of the paper P on which the toner image is transferred by the secondary transfer roller 22, and the transport of the paper P in the fixing device 26 is further provided. On the downstream side in the direction, there is provided a paper discharge roller 28 for discharging the fixed paper P sent out after receiving the fixing process to the upper paper discharge tray 27.

  The fixing device 26 includes a heating roller 31 having a heating source 30 therein, the surface of which is maintained at a set temperature, a fixing roller 32 provided facing the heating roller 31, and the heating roller 31 and the fixing roller. An endless fixing belt 33 laid between 32 and a pressure roller 34 that presses against the fixing belt 32 via the fixing belt 33, etc., and these members are provided in the apparatus housing 35. The fixing device 26 is provided in the image forming apparatus so as to be detachable horizontally and vertically (arrow A direction) with respect to the longitudinal direction of the apparatus housing 35 (vertical direction in FIG. 1).

  In the figure, reference numeral 36 denotes an intermediate transfer member cleaning device that removes residual toner remaining on the intermediate transfer belt 19 after image transfer.

  Next, the operation of the printer having the above configuration will be described.

  The photoconductors 11Y, C, M, and B, whose surface is uniformly charged, are irradiated with laser light L writing light from the optical writing unit 15 based on the image data. An electrostatic latent image is formed thereon. Thereafter, toner development is performed by the developing devices 12Y, 12C, 12M, and 12K, and the electrostatic latent images are visualized to form yellow, cyan, magenta, and magenta on the photoreceptors 11Y, 11C, 11M, and 11K, respectively. A black monochrome image is formed.

  The toner images of the respective colors are sequentially transferred onto the intermediate transfer belt 19 by the primary transfer devices 21Y, 21C, 21M, and 21K as the intermediate transfer belt 19 moves in the direction of the arrow by driving the support rollers 20a and 20b. As a result, a composite color image is formed on the intermediate transfer belt 19. Residual toner is removed from the surfaces of the photoconductors 11Y, 11C, 11M, and 11K after image transfer by photoconductor cleaning devices 13Y, 13C, 13M, and 13K to prepare for the next image formation.

  In accordance with the timing of image formation, the paper P is fed from the paper feed cassette 23 by the paper feed roller 24 and conveyed to the registration roller 25, and the front end of the paper is temporarily stopped. Then, the sheet is conveyed between the secondary transfer roller 22 and the intermediate transfer belt 19 while taking timing with the image forming operation. Here, the intermediate transfer belt 19 and the secondary transfer roller 22 sandwich the paper P to form a so-called secondary transfer nip, and the secondary transfer roller 22 transfers the toner image on the intermediate transfer belt 19 onto the paper P. Transcript.

  The sheet P after the image transfer is conveyed to the fixing device 26. The fixing device 26 heats and presses the toner image on the paper P at the fixing nip portion between the fixing belt 33 and the pressure roller 34 and fixes the toner image on the paper. Further, the sheet P discharged from the fixing nip portion is discharged to the upper discharge tray 27 by the discharge roller 28.

  Next, the configuration relating to the fixing device and the drawer connector as the electrical contact in the present embodiment will be described. 2A is a plan view showing the schematic structure of the fixing device in the present embodiment, FIG. 2B is a front view showing the schematic structure of the fixing device in the present embodiment, and FIG. 3B is a side view showing a schematic structure of the driving unit of the fixing device, FIG. 3B is an explanatory diagram of a planar state showing the main part of the driving unit of FIG. 3A, and the arrangement position of the drawer connector 40 is shown in FIG. (A), (b), and the shaded area in FIG. 3 (a).

  In the fixing device 26 according to the present embodiment, a driving force is input from the lower side of the device housing 35 from a driving motor or the like, via a driving transmission member 41 including a driving force transmission mechanism such as a gear, a pulley, or a belt, and a transmission mechanism. A driving force is transmitted to at least one of the fixing roller 32 and the pressure roller 34. The drive transmission member 41 is installed in the drive unit installation region 42 in the apparatus housing 35.

  A heating member including a heating roller 31 having a heating source 30, a fixing roller 32, and a fixing belt 33, and a pressure roller 34 as a pressure member are installed in a fixing unit installation region 43 inside the apparatus housing 35. ing. The drive unit installation area 42 and the fixing unit installation area 43 are provided adjacent to each other inside the apparatus housing 35.

  In the configuration example 1 of the drive unit shown in FIGS. 3A and 3B, the drive gears 44 and 45 fixed to the fixing roller 32 and the pressure roller 34, and the drive gears 44 and 45 mesh with the drive motors, respectively. The drive transmission member 41 is constituted by the input gears 46 and 47 that transmit the driving force from the input gears 46 and 47.

  However, in this case, when the driving gears 44 and 45 provided on the fixing roller 32 and the pressure roller 34 are arranged in the same plane in a planar state, they are likely to interfere with each other, and in particular, the fixing roller 32. As the diameter of the pressure roller 34 becomes smaller, the positional relationship is more likely to interfere.

  For this reason, in the configuration example 1, as shown in FIG. 3B, the installation positions of the drive gears 44 and 45 provided on the fixing roller 32 and the pressure roller 34 are shifted in the tooth width direction a. . With this configuration, the interference can be avoided. However, the space in the tooth width direction a is widened by the amount b shifted as described above.

  4A and 4B show a configuration example 2 of the drive unit in the present embodiment, FIG. 4A is a side view showing a schematic structure of the drive unit of the fixing device, and FIG. It is a perspective view which shows the principal part of the drive part of Fig.4 (a).

  In the configuration example 2, one input gear 46 meshed with the drive gear 44 fixed to the fixing roller 32, and the other of the two-stage gear structure meshed with the one input gear 46 and the drive gear 45 of the pressure roller 34, respectively. The drive transmission member 41 is constituted by the input gear 48.

  That is, the other input gear 48 constitutes a transmission gear train in which the large-diameter gear portion 48 a meshes with the one input gear 46 and the small-diameter gear portion 48 b meshes with the drive gear 45 of the pressure roller 34. Therefore, the drive gear 45 of the pressure roller 34 can be reduced in diameter by the speed reducing action between the large diameter gear portion 48a and the small diameter gear portion 48b, and the problem of interference can be avoided. However, the adoption of the two-stage gear structure widens the space in the tooth width direction as described above.

  As described above, in the drive unit installation region 42, the space is required to transmit the driving force to the fixing roller 32, the pressure roller 34, and the like, and the transmission mechanism is changed from the lower surface of the apparatus housing 35 to the upper roller installation position. Due to problems such as installation and mechanical strength, the length and width of the space are required for each part of the frame that holds the component members. For this reason, as shown in FIG. 2B and FIG. 3A, a space in which no parts are arranged is formed above the drive unit installation region 42. Therefore, by installing the drawer connector 40 in the space of the drive unit installation area 42, the device space can be effectively used.

  In addition, by providing the drawer connector 40 in the drive unit installation area 42, the drawer connector 40 is arranged outside the fixing unit installation area 43 that is a heat generation source. The frame of the drive unit installation area 42 is cut off, and the degree of thermal influence on the drawer connector 40 can be reduced.

  Furthermore, in this embodiment, as shown in FIG. 5, a resin-made holding member 50 is provided at the attachment holding portion of the drawer connector 40. As a result, it is advantageous in terms of heat conduction as compared with the case of holding with metal. As illustrated in FIG. 4, it is conceivable that the resin holding member 50 is integrally formed with a guide path 51 for winding a harness that is an electrical wiring member.

  Conventionally, since the member that holds the drawer connector 40 is made of metal, it is not possible to easily provide a fine guide path. Pull out the harness from the drawer connector 40 in the necessary direction and use a clamp or the like. It was fixed and crawled. As a result, the number of man-hours is increased, and it is unclear which harness is to be wound in which direction, and the harnesses are unnecessarily overlapped with each other.

  In particular, in the case of the fixing device 26, a primary power source harness for supplying power to the heating source 30 and a secondary control system harness such as a temperature control signal are mixed. If the harness of the primary power supply system and the harness of the secondary control system overlap with each other, a noise occurs on the control system harness and a malfunction such as a control error occurs.

  However, since the resin-made holding member 50 of this embodiment has a harness guide path (wiring guide path portion) 45, each harness is guided to the guide path 51 when the drawer connector 40 is set on the holding member 50. As a result, it is no longer necessary to make complicated ugly turns. Further, the guide path 51 is made of a resin having an insulating property and functioning as a signal shield, and has a structure in which the guide path 51 is partitioned so that a primary power supply system harness and a secondary control system harness are formed. Problems such as overlapping can be solved.

  As a configuration of the drawer connector 40, as shown in FIG. 7, a structure in which harnesses 52 are arranged in two upper and lower stages is most common. Therefore, as in the modification of the holding member 53 shown in FIG. 7, the guide path 54 may be formed in a two-stage structure corresponding to the structure in which the drawer connector 40 is divided into the upper and lower stages. With such a configuration, it is possible to more reliably guide each harness to a predetermined position.

  Moreover, it can be set as the structure which connects harnesses with the holding member 55 like the other modification of the holding member shown in FIG. Conventionally, it has been complicated to connect the harnesses at appropriate locations in the apparatus, but the assembly can be improved by connecting them together on the holding member 55 as in this example.

  FIG. 8 shows an example of the wiring of the primary power supply system harness. In general, the primary power supply system harness is connected by faston terminals. In this case, however, the connector portion is large and requires a space. There is. Therefore, in this example, the terminal block 56 and the round terminal 57 manufactured by brass or the like are fixed by screws 58 in place of the faston terminals. By performing all of the plurality of harness connections on the holding member 55, the terminal block and the terminal block holding member which are necessary in each place can be collected, so that space saving and cost reduction can be achieved.

  Further, as shown in FIG. 8, by changing the shape of the terminal block 56 according to the usage method, a terminal structure capable of distributing and consolidating the harness 59 in the pull-out direction can be obtained.

  The example shown in FIG. 8 is an example of a primary power supply system harness, but the harness used for the secondary signal system can be connected and distributed on the holding member 55. For example, a terminal that can be connected on the holding member 55 by providing a shape portion for fixing the panel mount used for connecting the harness on the holding member 55, and can distribute and aggregate the harness. Can be structured.

  In the present embodiment, as shown in the perspective view of FIG. 9A and the side view of FIG. 9B, the drawer connector 40 and the holding member 60 are connected to the apparatus housing 35 of the fixing device 26 with respect to the drawer. The connector 40 is configured to be movable in the insertion / removal direction (arrow A direction). Accordingly, it is possible to prevent insufficient connection between the connector on the image forming apparatus side and the drawer connector 40 due to variations in the installation position when the fixing device 26 is mounted on the image forming apparatus to be mounted. It is.

  Specifically, as shown in FIG. 9B, an elastic member 61 such as a coil spring is disposed between the device housing 35 and the holding member 54 of the fixing device 26, and the drawer connector 40 and the elastic member 55 are arranged by the elastic member 55. The holding member 60 is configured to be pressed from behind in the fixing device insertion direction. In this way, by initial setting so that the connector on the image forming apparatus side (not shown) and the drawer connector 40 on the fixing apparatus side are bitten, in the case of excessive push-in, the elastic member 61 pushes back. As a result, both connectors can be reliably fitted with a pressing force.

  Furthermore, as shown in FIG. 9, by arranging the holding member 60 above the fixing device 26, it is possible to give the holding member 60 a function as a part of the protective cover in the fixing device 26.

  The present invention is applied to a fixing device provided in an electrophotographic image forming unit such as a copying machine, a printer, and a facsimile machine, and is particularly effective when applied to an apparatus using various types of sheet paper as a recording medium.

1 is a schematic configuration diagram of a color laser printer which is an embodiment of an image forming apparatus of the present invention. (A) is a plan view showing a schematic structure of a fixing device in the present embodiment, (b) is a front view showing a schematic structure of the fixing device in the present embodiment. (A) is a side view showing a configuration example 1 of the drive unit of the fixing device according to the present embodiment, and (b) is an explanatory diagram of a planar state showing the main part of the drive unit of (a). (A) is a side view showing a configuration example 2 of the drive unit in the present embodiment, (b) is a perspective view showing the main part of the drive unit of (a). The perspective view which shows the related structure of the drawer connector and holding member in this embodiment. The top view of the holding member which shows the guideway of the harness in this embodiment Partial sectional drawing of the modification of the holding member in this embodiment The perspective view of the modification of the holding member in this embodiment (A) is a perspective view of the modification of the holding member in this embodiment, (b) is a side view of the holding member shown to (a). Sectional drawing which shows schematic structure of the conventional fixing device. External perspective view of the conventional fixing device shown in FIG. External perspective view of another conventional fixing device

Explanation of symbols

26 Fixing device 30 Heating source 31 Heating roller 32 Fixing roller 33 Fixing belt 34 Pressure roller 35 Device housing 40 Drawer connector 41 Drive transmission member 42 Driving portion installation region 43 Fixing portion installation region 44, 45 Driving gears 46, 47 Input gear 48 Input gear (two-stage gear)
48a Large-diameter gear portion 48b Small-diameter gear portion 50, 53, 55, 60 Holding member 51, 54 Guide path 52, 59 Harness 56 Terminal block 57 Round terminal 58 Screw 61 Elastic member

Claims (8)

A fixing device that forms a nip portion by a heating member that is heated by a heating source and a pressure member that contacts the heating member with a predetermined pressure, and that fixes the toner image on the recording medium at the nip portion. In
A drive in which a fixing unit installation region in which the heating member and the pressure member are installed and a drive transmission member that drives at least one of the heating member and the pressure member outside the fixing unit installation region are installed in the apparatus housing. Part installation area,
A fixing device comprising: a resin holding member provided with a connector having a contact point electrically connected to a power supply unit, provided in the device housing in the drive unit installation region.   The fixing device according to claim 1, wherein a wiring guide path portion for winding the electrical wiring member around the holding member is integrally formed.   The fixing device according to claim 2, wherein the wiring guide path portion is formed in a plurality of stages.   The fixing device according to claim 1, wherein the holding member is provided with a terminal for distributing and collecting the electrical wiring members.   The fixing device according to claim 1, wherein the holding member is provided in the apparatus housing so as to be movable in the connector insertion / extraction direction.   The fixing device according to claim 1, wherein the holding member is configured to also serve as a protective cover of the fixing device.   An image forming apparatus comprising: an image forming unit that forms a toner image on a recording medium with a toner developer; and a fixing unit that fixes the toner image on the recording medium conveyed from the image forming unit. An image forming apparatus comprising the fixing device according to claim 1 as a fixing unit.   The image forming apparatus according to claim 7, wherein the fixing device is detachably installed in the image forming apparatus in a direction perpendicular to a longitudinal direction of the fixing member.

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