JP2022049871A - Image forming apparatus - Google Patents

Abstract

To provide an image forming apparatus that can reduce the false setting of a pressing state of a pressure member.SOLUTION: An image forming apparatus comprises: an apparatus main body that has a right side door 62; and a fixing unit 44 that has a pressure release lever 76 allowing manual switching of a pressing state of a pressure roller. A display member 84 is rotatably provided on an inner surface side of the right side door. The display member has a contact part and a state display part, rotates according to the position of the pressure release lever when the right side door is closed, and causes a display portion of the state display part according to the pressing state of the pressure roller to face an opening 62a of the right side door.SELECTED DRAWING: Figure 9

Description

The present invention relates to an image forming apparatus, and more particularly to an image forming apparatus including a fixing unit having a fixing member and a pressurizing member in the main body of the device.

An example of a conventional image forming apparatus is disclosed in Patent Document 1. The image forming apparatus of Patent Document 1 includes a support member that supports a second fixing member (pressurizing member) facing the first fixing member (fixing member) so as to be detachable from the first fixing member, and a second fixing member. A fixing device including an urging member that urges a support member so that the member is in pressure contact with the first fixing member, and a pressure release member that releases pressure contact of the second fixing member with respect to the first fixing member. This fixing device is configured to relatively move the pressure release member with respect to the support member along a predetermined movement direction so that the urging member acts. The support member has a first holding portion that holds the pressure release member at a pressure position on which the urging member acts in the moving direction. The pressure release member has a held portion held by the first holding portion of the support member. In a state where the held portion is held by the first holding portion of the support member, an urging force is applied to the support member by the urging member to press the second fixing member against the first fixing member. On the other hand, in a state where the support member of the held portion is released from being held by the first holding portion, the second fixing member is at the release position in the moving direction in which the urging force applied to the support member by the urging member is released. 1 Release the pressure contact to the fixing member.

Japanese Unexamined Patent Publication No. 2014-191288

In the technique of Patent Document 1, the user manually operates the pressure release lever to release the pressure contact of the pressure member with respect to the fixing member (press pressure) and the standard state (pressure contact state) in which the pressure member is pressed against the fixing member. Can be switched to the pressure welding release state. However, in the technique of Patent Document 1, since the position (state) of the pressure release lever cannot be confirmed from the outside, the pressure release lever is set at the wrong position, that is, the pressure state of the pressurizing member is set incorrectly. In particular, the user may start printing without noticing it, which may cause a printing error or a paper jam.

Therefore, a main object of the present invention is to provide a novel image forming apparatus.

Another object of the present invention is to provide an image forming apparatus capable of reducing erroneous setting of a pressing state of a pressure member.

The first invention is an image forming apparatus including a fixing unit having a fixing member and a pressurizing member in the main body of the apparatus, so as to project toward the opening / closing portion and the opening / closing portion side provided on the side surface of the main body of the apparatus. Rotated to the inner surface side of the opening / closing part at the position corresponding to the pressure release lever and the pressure release lever, which are provided on the fixing unit and can manually switch the pressing state of the pressure member against the fixing member including the standard state and the pressure release state. It is provided with a display member that can be provided and an opening formed in the opening / closing part at a position corresponding to the display member. It has a state display part that displays whether or not it is, and when the opening / closing part is closed, it rotates according to the position of the pressure release lever to open the display part of the state display part according to the pressing state of the pressurizing member. It is an image forming device that can be used to face the pressure.

According to the first invention, when the opening / closing part is closed, the display member rotates according to the position of the pressure release lever, and the display part of the state display part according to the pressing state of the pressure member faces the opening. Therefore, even when the opening / closing portion is closed, the setting of the pressing state of the pressurizing member can be visually recognized from the outside. Therefore, it is possible to reduce or prevent erroneous setting of the pressing state of the pressure member.

The second invention is dependent on the first invention, the pressure release lever is displaceable between the first position and the second position, and the contact portion of the display member is the pressure release lever at the first position. It includes a first arm that rotates the display member in a predetermined direction by contacting the display member, and a second arm that rotates the display member in a direction opposite to the predetermined direction by contacting with the pressure release lever at the second position.

The third invention is dependent on the first or second invention, in which the pressure release lever is arranged at the first pressure release lever arranged at one end of the fixing unit and at the other end of the fixing unit. A second pressure release lever is included, and the display member includes a first display member provided at a position corresponding to the first pressure release lever and a second display member provided at a position corresponding to the second pressure release lever. , The rotation axis of the first display member and the rotation axis of the second display member are integrated by a connected rotation axis.

According to the present invention, even when the opening / closing portion is closed, the setting of the pressing state of the pressurizing member can be visually recognized from the outside, so that it is possible to reduce or prevent erroneous setting of the pressing state of the pressurizing member.

The above-mentioned object, other object, feature and advantage of the present invention will be further clarified from the detailed description of the examples described below with reference to the drawings.

It is a schematic sectional drawing which shows the internal structure of the image forming apparatus which is 1st Example of this invention. It is a perspective view which shows the image forming apparatus with the right door open. It is a perspective view which shows the fixing unit. It is a schematic diagram which shows the display member in a reference state provided in the right side door. It is a perspective view which shows the display member. It is a schematic diagram which shows the appearance of the right side door seen from the right side of an image forming apparatus. It is a schematic diagram which shows the state when the right door is closed. It is a schematic diagram which shows the state when the right side door is closed with the pressure release lever in the 1st position. It is a schematic diagram which shows the state when the right side door is closed with the pressure release lever in the 2nd position. It is a perspective view which shows the display member provided in the image forming apparatus of 2nd Embodiment of this invention. It is a perspective view which shows the display member provided in the image forming apparatus of 3rd Embodiment of this invention. It is a perspective view which shows the display member provided in the image forming apparatus of 4th Embodiment of this invention.

[First Example]
With reference to FIGS. 1 and 2, the image forming apparatus 10 of the first embodiment of the present invention is a color multifunction device having a copying function, a printer function, a scanner function, a facsimile function, and the like, and is printed on paper by an electrophotographic method. A multicolor or monochromatic image is formed on (recording medium). As will be described in detail later, the image forming apparatus 10 includes a fixing unit 44 in the apparatus main body 12. The fixing unit 44 is provided with a displacement mechanism capable of manually switching the pressing state (pressure contact load) of the pressure roller 72 against the fixing roller 70, and the position of the pressure roller 72 is changed according to the type of paper. In addition to plain paper, special paper such as envelopes, thick paper, and transparencies, which are thicker and stronger than plain paper (hereinafter, these thick papers may be collectively referred to as "envelopes, etc."). Also makes it possible to pass paper properly.

First, the configuration of the image forming apparatus 10 will be schematically described. In this embodiment, the front-back direction (depth direction) of the image forming apparatus 10 and its constituent members is defined with the surface facing the user's standing position, that is, the surface on the side where the operation panel 28 is provided, as the front surface (front surface). The left-right direction (lateral direction) of the image forming apparatus 10 and its constituent members is defined based on the state in which the image forming apparatus 10 is viewed by the user.

As shown in FIGS. 1 and 2, the image forming apparatus 10 includes an apparatus main body 12 including an image forming unit 30 and an image reading device 14 arranged above the apparatus main body 12.

The image reading device 14 includes a document mounting table 16 formed of a transparent material. A document holding cover 18 can be opened and closed above the document mounting table 16 via a hinge or the like. A document supply tray 20 is provided on the upper surface of the document holding cover 18, and an ADF (automatic document feeder) is provided inside the document supply tray 20. The ADF automatically supplies the documents placed on the document supply tray 20 one by one to the image reading position 22, and ejects the documents to the document ejection tray 24.

Further, the image reading unit 26 built in the image reading device 14 includes a light source, a plurality of mirrors, an imaging lens, a line sensor, and the like. The image reading unit 26 exposes the surface of the document with a light source, and guides the reflected light reflected from the surface of the document to the imaging lens by a plurality of mirrors. Then, the reflected light is imaged on the light receiving element of the line sensor by the imaging lens. The line sensor detects the luminance and chromaticity of the reflected light imaged on the light receiving element, and generates image data based on the image on the surface of the document. As the line sensor, a CCD (Charge Coupled Device), a CIS (Contact Image Sensor) or the like is used.

An operation panel 28 for receiving an input operation such as a print instruction by a user is provided on the front side of the image reading device 14. The operation panel 28 has a display with a touch panel on the upper surface, a plurality of operation buttons, and the like.

Further, in the housing 60 of the apparatus main body 12, a control unit (not shown) including a CPU, a memory, and the like, an image forming unit 30, and the like are provided. The control unit transmits a control signal to each part of the image forming apparatus 10 in response to an input operation to the operation panel 28, and causes the image forming apparatus 10 to perform various operations.

The image forming unit 30 includes an exposure unit 32, a developing device 34, a photoconductor drum 36, a cleaner unit 38, a charging device 40, a transfer device 42, a fixing unit 44, and the like, and is provided on paper conveyed from the paper feed cassette 46 and the like. An image is formed, and the image-formed paper is ejected to the output tray 48. As the image data for forming an image on the paper, the image data read by the image reading unit 26, the image data transmitted from an external computer, or the like is used.

The image data handled by the image forming apparatus 10 corresponds to four color images of black (K), cyan (C), magenta (M), and yellow (Y). Therefore, each of the developer 34, the photoconductor drum 36, the cleaner unit 38, and the charger 40 is provided so as to form four types of latent images corresponding to each color, whereby four image stations are provided. It is composed.

The photoconductor drum 36 is an image carrier in which a photosensitive layer is formed on the surface of a cylindrical substrate having conductivity, and the charger 40 is a member that charges the surface of the photoconductor drum 36 to a predetermined potential. be. Further, the exposure unit 32 is configured as a laser scanning unit (LSU) provided with a laser emitting unit, a reflection mirror, and the like, and by exposing the surface of the charged photoconductor drum 36, electrostatic latency corresponding to image data is obtained. An image is formed on the surface of the photoconductor drum 36. The developer 34 visualizes an electrostatic latent image formed on the surface of the photoconductor drum 36 with four-color (YMCK) toner. Further, the cleaner unit 38 removes the toner remaining on the surface of the photoconductor drum 36 after development and image transfer.

The transfer device 42 is a device for transferring the toner image formed on the photoconductor drum 36 onto paper, and includes an intermediate transfer unit 50 and a transfer unit (secondary transfer unit) 52. However, the transfer device 42 does not necessarily have to be an intermediate transfer method including the intermediate transfer unit 50, and a configuration in which the toner image on the photoconductor drum 36 is directly transferred to the paper by the transfer unit can also be adopted.

The intermediate transfer unit 50 includes an intermediate transfer belt, a suspension roller, four intermediate transfer rollers, and the like, and is arranged above the photoconductor drum 36. At the time of image formation, a predetermined voltage is applied to the intermediate transfer roller to form a transfer electric field between the photoconductor drum 36 and the intermediate transfer belt. Then, by the action of this transfer electric field, the toner image formed on the outer peripheral surface of the photoconductor drum 36 is sequentially transferred to the outer peripheral surface of the intermediate transfer belt that moves around.

The transfer unit 52 includes a transfer roller provided to press the intermediate transfer belt. At the time of image formation, a transfer electric field is formed between the intermediate transfer belt and the transfer roller by applying a predetermined voltage to the transfer roller. Then, due to the action of this transfer electric field, the toner image formed on the outer peripheral surface of the intermediate transfer belt is transferred to the paper while the paper passes through the transfer nip portion between the intermediate transfer belt and the transfer roller.

The fixing unit 44 includes a fixing roller (heat roller) 70 and a pressure roller 72, and is arranged above the transfer unit 52. The fixing roller 70 is set to have a predetermined fixing temperature, and the toner image transferred to the paper is melted by the paper passing through the fixing nip portion between the fixing roller 70 and the pressure roller 72. The toner image is heat-fixed to the paper by mixing and pressure welding. The specific configuration of the fixing unit 44 will be described later.

In such an apparatus main body 12, the first paper transport path L1 for feeding the paper conveyed from the paper feed cassette 46 or the like to the output tray 48 via the resist roller 56, the transfer device 42, and the fixing unit 44. Is formed. Further, when double-sided printing is performed on paper, the paper after single-sided printing is completed and has passed through the fixing unit 44 is returned to the first paper transport path L1 on the upstream side of the transfer unit 52 in the paper transport direction. The second paper transport path L2 is formed. A plurality of transport rollers 58 for additionally applying a propulsive force to the paper are appropriately provided in the first paper transport path L1 and the second paper transport path L2.

Further, an opening 60a is formed on the right side surface of the housing 60 of the main body 12, and a right door 62, which is an example of the opening / closing portion, is provided in the opening 60a so as to be openable / closable by a hinge or the like. The right door 62 is a door that opens upward by rotating to the right with the lower end as a fulcrum, and the right surface of the fixing unit 44 is exposed by opening the right door 62.

With reference to FIGS. 1 and 2, the fixing unit 44 includes a fixing roller 70 which is an example of a fixing member, a pressure roller 72 which is an example of a pressure member, and the like, which are predetermined by a fixing frame 74. It is held integrally in the arrangement mode of. Each of the fixing roller 70 and the pressure roller 72 is provided in parallel with each other so that the rotation axis extends in the front-rear direction.

Further, in this first embodiment, the pressurizing roller 72 is in contact with the fixing roller 70 by the first pressing force (press contact state) and the fixing roller in the second pressing force smaller than the first pressing force. It is possible to displace to the pressure release state that abuts against. That is, the pressurizing roller 72 is provided so that the pressing state against the fixing roller 70 can be switched. For example, when the paper is plain paper, the pressure roller 72 is put into a standard state, and when the paper is an envelope or the like, the pressure roller 72 is put into a pressure release state. When the fixing operation is performed on the envelope or the like, the pressing force of the pressure roller 72 on the fixing roller 70 is made smaller than usual, so that the occurrence of wrinkles and paper jams can be reduced.

As for the displacement mechanism (detachment mechanism) for switching the pressing state of the pressurizing roller 72 against the fixing roller 70, a known mechanism may be appropriately used, and thus the description thereof is omitted here. The user can switch the pressure roller 72 between the standard state and the pressure release state by manually operating (moving up and down) the pressure release levers 76 and 78 that form a part of the displacement mechanism.

The pressure release levers 76 and 78 are a pair of levers arranged at both ends (front end and rear end) in the rotation axis direction (longitudinal direction of the fixing unit 44) of the pressure roller 72, that is, the first pressure release lever 76. And the second pressure release lever 78. Each of the pressure release levers 76 and 78 (first pressure release lever 76 and second pressure release lever 78) is provided so as to project from the right side surface of the fixing frame 74 toward the right door 62 side. When each of the pressure release levers 76 and 78 is in the first position (lower position: see FIG. 8), the pressure roller 72 is in the standard state and is in the second position (upper position: see FIG. 9). At one point, the pressure roller 72 is in a pressure release state.

Further, on the right side surface of the fixing frame 74, an operation guide portion 80 is provided below each of the pressure release levers 76 and 78. The operation guide unit 80 is a display unit for showing the user the relationship between the positions of the pressure release levers 76 and 78 and the pressing state of the pressure roller 72 (that is, the type of paper to be passed through). In the operation guide unit 80 of the first embodiment, when the pressure release levers 76 and 78 are moved upward, the pressure roller 72 is in the pressed state (pressure release state) for the envelope, and the pressure release levers 76 and 78 are placed on the lower side. A mark indicating that the pressure roller 72 is in the pressed state (standard state) for plain paper when moved to is shown.

Here, in the conventional image forming apparatus, the position (state) of the pressure release lever cannot be confirmed from the outside when the right door is closed. For this reason, the user may start printing without noticing that the pressure release lever is set at the wrong position, which may cause a printing error or a paper jam. Further, it is conceivable to provide a sensor so that the position of the pressure release lever can be confirmed, but the sensor is expensive and its control becomes complicated.

Therefore, in this first embodiment, the display members 84 and 86 that are displaced according to the positions of the pressure release levers 76 and 78 are provided on the inner surface side of the right door 62, and the display members 84 and 86 can be visually recognized on the right door 62. By providing the openings 62a and 62b, the positions of the pressure release levers 76 and 78 (that is, the setting of the pressure state of the pressure roller 72) can be visually recognized from the outside even when the right door 62 is closed. .. Hereinafter, a specific description will be given.

As shown in FIGS. 4 and 5, display members 84,86 are rotatably provided on the inner surface side of the right door 62 at positions corresponding to the pressure release levers 76,78. In this first embodiment, the display members 84 and 86 have a first display member 84 provided at a position corresponding to the first pressure release lever 76 and a second display provided at a position corresponding to the second pressure release lever 78. Includes member 86. Each of the display members 84, 86 has a rotation shaft 84a, 86a, a first arm 84b, 86b, a second arm 84c, 86c, and a state display unit 84d, 86d.

The first arms 84b, 86b and the second arms 84c, 86c are portions that come into contact with the pressure release levers 76,78 when the right door 62 is closed (that is, contact portions with the pressure release levers 76,78). , Formed in the shape of a rectangular plate. The first arms 84b, 86b extend diagonally downward from the rotation shafts 84a, 86a, and come into contact with the pressure release levers 76, 78 at the first position to direct the display members 84, 86 in a predetermined direction (in this embodiment). , Counterclockwise when viewed from the front). The second arms 84c, 86c extend diagonally upward from the rotation shafts 84a, 86a, and come into contact with the pressure release levers 76, 78 at the second position to cause the display members 84, 86 to move in the direction opposite to the predetermined direction (this). In the embodiment, it is rotated clockwise when viewed from the front.

The state display units 84d and 86d are portions for displaying which pressing state the pressure roller 72 is in, and are formed in the shape of an arc plate. On the outer surface side (right side surface) of the status display units 84d and 86d, plain paper marks 84e and 86e indicating that the pressure roller 72 is in the standard state are displayed as display portions for displaying the pressure state of the pressure roller 72. , Envelope marks 84f and 86f indicating that the pressure roller 72 is in the pressure release state are formed.

Further, in the first embodiment, the rotary shaft 84a of the first display member 84 and the rotary shaft 86a of the second display member 86 are integrated by a straight rod-shaped connecting rotary shaft 88, and these first display members 84 are integrated. , The display unit 82 is formed by the second display member 86 and the connecting rotary shaft 88. Further, the connecting rotary shaft 88 (or rotary shaft 84a, 86a) is rotatably supported by a support member (bearing) 90 provided on the inner surface of the right door 62. Further, although not shown, the connecting rotary shaft 88 is provided with an urging member such as a torsion coil spring for returning the display members 84 and 86 to the reference state. In this first embodiment, the state shown in FIG. 4 is set as the reference state of the display members 84 and 86.

Further, as shown in FIGS. 4 and 6, the right door 62 is formed with openings 62a and 62b at positions corresponding to the display members 84 and 86. The openings 62a and 62b are window holes that make the display portions (plain paper marks 84e, 86e or envelope marks 84f, 86f) of the state display units 84d, 86d included in the display members 84,86 visible from the outside. In this first embodiment, the openings 62a and 62b include a first opening 62a provided at a position corresponding to the first display member 84 and a second opening 62b provided at a position corresponding to the second display member 86. ..

Subsequently, with reference to FIGS. 7 to 9, the operation of the display members 84 and 86 when opening and closing the right door 62 will be described. As shown in FIG. 7 (and FIG. 2), when the right door 62 is opened, the right side surface of the fixing unit 44 is exposed, and the user can operate the pressure release levers 76 and 78. Further, when the right door 62 is open, the display members 84 and 86 are in the reference state.

As shown in FIG. 8, when the right door 62 is closed while the pressure release lever 76,78 is in the first position, the tip of the pressure release lever 76,78 is closed immediately before the right door 62 is closed. The upper surfaces of the first arms 84b and 86b of the display members 84 and 86 come into contact with each other. Then, the first arms 84b, 86b are pushed downward by the pressure release levers 76,78 from immediately before the right door 62 is closed until the right door 62 is completely closed, so that the display members 84,86 (the entire display unit 82) are pushed. Rotates counterclockwise, and the plain paper marks 84e and 86e of the status display units 84d and 86d face the openings 62a and 62b. As a result, the user can visually recognize that the pressure roller 72 is in the standard state (that is, the pressing state for plain paper) from the outside of the apparatus main body 12.

On the other hand, as shown in FIG. 9, when the right door 62 is closed while the pressure release lever 76,78 is in the second position, the tip of the pressure release lever 76,78 is closed immediately before the right door 62 is closed. The lower surfaces of the second arms 84c and 86c of the display members 84 and 86 abut against the display members 84c and 86c. Then, the second arms 84c and 86c are pushed upward by the pressure release levers 76 and 78 from immediately before the right door 62 is closed until the right door 62 is completely closed, so that the display members 84 and 86 rotate clockwise. The envelope marks 84f and 86f of the status display units 84d and 86d face the openings 62a and 62b (see FIG. 6). As a result, the user can visually recognize that the pressure roller 72 is in the pressure release state (that is, the pressure state for an envelope or the like) from the outside of the apparatus main body 12.

If the user mistakenly operates the pressure release lever 76,78 to move only one of the pressure release levers 76, 78, for example, the first pressure release lever 76 is in the first position and the second pressure release lever is released. When the lever 78 is in the second position and the right door 62 is to be closed, the first display member 84 tries to rotate counterclockwise, whereas the second display member 86 rotates clockwise. Try to move. That is, when the position of the first pressure release lever 76 and the position of the second pressure release lever 78 do not match, a twist occurs in the display unit 82, and the pressure release levers 76 and 78 interfere with the display unit 82. Therefore, the right door 62 cannot be closed (that is, the printing operation cannot be started). As a result, when the user makes an operation error, the user can be made aware that the state is abnormal, so that it is possible to more reliably prevent the pressing state of the pressurizing roller 72 from being erroneously set.

As described above, according to the first embodiment, the display members 84 and 86 rotate according to the positions of the pressure release levers 76 and 78 when the right door 62 is closed, and press the pressure roller 72. The display portions of the state display units 84d and 86d according to the state are made to face the openings 62a and 62b. That is, even when the right door 62 is closed, the setting of the pressing state of the pressurizing roller 72 can be visually recognized from the outside. Therefore, it is possible to reduce or prevent erroneous setting of the pressing state of the pressurizing roller 72.

Further, according to the first embodiment, each of the first display member 84 and the second display member 86 includes the first arms 84b, 86b and the second arms 84c, 86c, and the rotation shaft 84a of the first display member 84. And the rotation shaft 86a of the second display member 86 are integrated by the connection rotation shaft 88. As a result, if the position of the first pressure release lever 76 and the position of the second pressure release lever 78 do not match, the right door 62 cannot be closed, so that the user is aware that the condition is abnormal. be able to. Therefore, it is possible to more reliably prevent erroneous setting of the pressing state of the pressurizing roller 72.

In the above-mentioned first embodiment, the display unit 82 including the first display member 84 and the second display member 86 is used as the display member, but the specific configuration of the display member can be changed as appropriate.

For example, as in the second embodiment shown in FIG. 10, the state display units 84d and 86d can be formed on only one of the first display member 84 and the second display member 86. In FIG. 10, a state display unit 84d is formed on the first display member 84, and a state display unit 86d is not formed on the second display member 86. That is, the display member may include at least one state display unit. In this case, only one opening may be formed in the right door 62.

Further, as in the third embodiment shown in FIG. 11, one of the first arms 84b and 86b and the second arms 84c and 86c can be formed on the display members 84 and 86. FIG. 11 exemplifies a first display member 84 and a second display member 86 in which the second arms 84c and 86c are formed and the first arms 84b and 86b are not formed, respectively. That is, the display member may be provided with at least one contact portion (arm portion). In this case, for example, the state in which the plain paper marks 84e and 86e of the state display units 84d and 86d face the openings 62a and 62b may be set as the reference state of the display members 84 and 86. When the right door 62 is closed with the pressure release lever 76,78 in the first position, the pressure release lever 76,78 does not interfere with the display member 84,86, and the pressure release lever 76,78 is the first. When the right door 62 is closed in the two positions, the display members 84,86 may be rotated by the pressure release levers 76,78, and the envelope marks 84f, 86f may face the openings 62a, 62b.

Further, as in the fourth embodiment shown in FIG. 12, the first display member 84 and the second display member 86 can be separated and arranged without being integrated by the connecting rotation shaft 88. Further, only one of the first display member 84 and the second display member 86 may be provided.

Furthermore, the display method in the status display units 84d and 86d can be changed as appropriate. For example, only the envelope marks 84f, 86f (or the plain paper marks 84e, 86e) are formed in the status display units 84d, 86d, and the state in which the envelope marks 84f, 86f cannot be visually recognized from the openings 62a, 62b is set as the standard state. It may be shown. Further, the status display units 84d and 86d may indicate the pressed state of the pressure roller 72 by characters such as "envelope" and "standard" instead of a figure (mark).

In each of the above-described embodiments, the image forming apparatus 10 is exemplified by a multifunction device in which a copying machine, a facsimile, a printer, or the like is combined. However, the image forming apparatus 10 may be any one of a copying machine, a facsimile, a printer, and the like, or It may be a multifunction device that combines at least two of these. The image forming apparatus 10 may be a monochrome machine that forms a monochrome image on a print medium.

Further, as the fixing member of the fixing unit 44, a belt type (a fixing belt wound around a fixing roller) may be adopted, and the fixing roller and the pressure roller are pressed against each other via the fixing belt. You may.

The specific numerical values and component shapes mentioned above are merely examples, and can be appropriately changed as needed, such as product specifications.

10 ... Image forming device 12 ... Device main body 14 ... Image reading device 30 ... Image forming unit 62 ... Right door (opening and closing part)
62a, 62b ... Opening 70 ... Fixing roller (fixing member)
44 ... Pressurized roller (pressurized member)
76,78… Pressure release lever 84,86… Display member

Claims (3)

An image forming apparatus including a fixing unit having a fixing member and a pressurizing member in the main body of the device.
An opening / closing portion provided on the side surface of the device body,
A pressure release lever provided on the fixing unit so as to project toward the opening / closing portion and capable of manually switching the pressing state of the pressure member against the fixing member including a standard state and a pressure release state.
It is provided with a display member rotatably provided on the inner surface side of the opening / closing portion at a position corresponding to the pressure release lever, and an opening formed in the opening / closing portion at a position corresponding to the display member.
The display member has a contact portion with the pressure release lever and a state display portion for displaying which pressing state the pressurizing member is set to, and when the opening / closing portion is closed, the display member has the same. An image forming apparatus that rotates according to the position of the pressure release lever so that the display portion of the state display unit corresponding to the pressing state of the pressurizing member faces the opening. The pressure release lever can be displaced between the first position and the second position.
The contact portion of the display member has a first arm that rotates the display member in a predetermined direction by contacting the pressure release lever at the first position, and the pressure release lever at the second position. The image forming apparatus according to claim 1, further comprising a second arm that rotates the display member in a direction opposite to the predetermined direction by abutting against the display member. The pressure release lever includes a first pressure release lever arranged at one end of the fixing unit and a second pressure release lever arranged at the other end of the fixing unit.
The display member includes a first display member provided at a position corresponding to the first pressure release lever and a second display member provided at a position corresponding to the second pressure release lever.
The image forming apparatus according to claim 1 or 2, wherein the rotation axis of the first display member and the rotation axis of the second display member are integrated by a connected rotation axis.

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