Image forming apparatus having a control board attached to a support member

An image forming apparatus includes an image forming unit configured to form an image on a recording material; a fixing unit configured to heat the image in order to fix the image to the recording material; a control board; a support member, wherein the control board is attached to the support member; and a mounting portion, wherein the support member is attached to the mounting portion. The support member includes a side wall. A height of the side wall is smaller than twice a distance between the side wall and the connector on the control board under a state in which the control board is attached to the support member, and is larger than a height from a bottom surface of the support member to an upper surface of the control board.

BACKGROUND OF THE INVENTION

Field of the Invention

The present disclosure relates to an image forming apparatus to which a control board attached to a support member is to be mounted.

Description of the Related Art

An image forming apparatus is configured by combining various units for image formation. The image forming apparatus also includes a control board for controlling an operation of each of the units. The control board is attached to a support member to be incorporated into the image forming apparatus. The support member disclosed in Japanese Patent Application Laid-open No. 2009-291042 has a configuration in which side walls are provided in its periphery to prevent contact between the control board and another unit, which is likely to occur at the time of being incorporated into an apparatus. The support member disclosed in Japanese Patent Application Laid-open No. 2017-44986 has a part to be used as a fixing portion for fixing a fan duct. This configuration is effective for space saving of an apparatus.

With a related-art support member, which is provided with side walls, it is possible to prevent the control board from being brought into contact with another unit at the time of being incorporated into an apparatus. However, in a case where a connector of a cable is inserted into a connector of the control board that has been incorporated into the apparatus, there is a possibility that a worker's hand or an automatic machine may interfere with one of the side walls of the support member. For this reason, the side walls of the support member cause deterioration in workability of insertion and removal of the connector. Therefore, the present disclosure has an object to easily insert or remove a connector into/from a control board mounted to a support member while preventing the control board from hitting an apparatus main body during mounting work of mounting the control board to the apparatus main body.

SUMMARY OF THE INVENTION

An image forming apparatus, according to the present disclosure includes: an image forming unit configured to form an image on a recording material; a fixing unit configured to fix the image to the recording material; a control board configured to electrically connect to the fixing unit via a connector; a support member, wherein the control board is attached to the support member; and a mounting portion, wherein the support member is attached to the mounting portion, wherein the support member includes a side wall, and wherein a height of the side wall is: smaller than twice a distance between the side wall and the connector on the control board under a state in which the control board is attached to the support member; larger than a first height, which is a height from a bottom surface of the support member to an upper surface of the control board, and smaller than a second height obtained by adding a height of the connector to the first height.

DESCRIPTION OF THE EMBODIMENTS

At least one embodiment of the present disclosure is described with reference to the accompanying drawings.

Apparatus Configuration

FIG. 1is a view for illustrating a configuration of an image forming apparatus being an example of an apparatus into which a control board is to be incorporated by a support member according to at least one embodiment. An image forming apparatus100is an electrophotographic full-color image forming apparatus configured to form an image on a recording material. The image forming apparatus100includes toner containers130Y,130M,130C, and130K, each of which contains replenishing developer (hereinafter referred to as “toner”). The toner containers130Y,130M,130C, and130K are removably mounted to a main body (casing) of the image forming apparatus100. The image forming apparatus100includes an image reading apparatus120configured to read an image of an original, and a user interface (UI)126configured to receive an instruction given by a user, and to provide the user with information.

The image forming apparatus100includes four image forming units103Y,103M,103C, and103K arranged at regular intervals. The image forming units103Y,103M,103C, and103K are removably mounted to the main body of the image forming apparatus100. The image forming units103Y,103M,103C, and103K are configured to form images of different colors. The image forming apparatus100includes a laser exposure device108for use during image formation by the image forming units103Y,103M,103C, and103K. The image forming apparatus100includes an intermediate transfer belt unit115including an intermediate transfer belt101on which an image is transferred from each of the image forming units103Y,103M,103C, and103K. The image forming apparatus100includes a secondary transfer unit configured to transfer the images on the intermediate transfer belt101onto the recording material, and a fixing unit400configured to fix the images to the recording material.

The image forming units103Y,103M,103C, and103K differ only in color of an image to be formed, and have the same configuration and execute the same processing. The image forming unit103Y forms an image in yellow. The image forming unit103M forms an image in magenta. The image forming unit103C forms an image in cyan. The image forming unit103K forms an image in black. In this example, only the configuration and processing of the image forming unit103Y are described, and a description of the configuration and processing of the image forming units103M,103C, and103K is omitted.

The image forming unit103Y includes a drum-type photosensitive member (hereinafter referred to as “photosensitive drum”)104Y as an image bearing member. In the periphery of the photosensitive drum104Y, a charging device109Y, a developing device105Y, and a drum cleaner112Y are provided. At an opposite position to the photosensitive drum104Y across the intermediate transfer belt101, a primary transfer roller114Y is provided.

The photosensitive drum104Y has, on its aluminum-made drum base, a photoconductive layer formed from a negatively-charged OPC. The photosensitive drum104Y is rotated at a predetermined speed by a drive motor (not shown). The charging device109Y is configured to uniformly charge the surface of the photosensitive drum104Y to a predetermined negative potential through use of a charging bias applied by a high-voltage unit to be described later.

The laser exposure device108includes a light emitting unit configured to emit laser light controlled in accordance with time-series electric digital pixel signals (hereinafter referred to as “image data”) indicating an image to be formed. The laser exposure device108is configured to expose the charged surface of the photosensitive drum104to laser light, to thereby form an electrostatic latent image corresponding to the image data on the surface of the photosensitive drum104. In this example, a yellow electrostatic latent image is formed based on yellow image data. The developing device105Y contains toner. The developing device105Y is configured to cause the toner (in this example, yellow toner) to adhere to the electrostatic latent image formed on the photosensitive drum104Y, to thereby develop the electrostatic latent image as a toner image (form a visible image). The primary transfer roller114Y is biased toward the photosensitive drum104Y side so that the primary transfer roller114Y presses the intermediate transfer belt101. The primary transfer roller114Y is configured to transfer the yellow toner image formed on the photosensitive drum104Y onto the intermediate transfer belt101. The drum cleaner112Y is configured to remove, after the transfer, transfer residual toner remaining on the photosensitive drum104Y therefrom. For that purpose, the drum cleaner112Y includes a cleaning blade, for example.

The image forming units103M,103C, and103K are similarly configured to form a toner image and transfer the toner image onto the intermediate transfer belt101. As described later, the intermediate transfer belt101rotates. The image forming units103Y,103M,103C, and103K transfer toner images of different colors in a superimposed way on the intermediate transfer belt101at a corresponding timing in accordance with the rotation of the intermediate transfer belt101. With this operation, a full-color toner image is formed on the intermediate transfer belt101.

The intermediate transfer belt unit115includes a drive roller116also serving as a secondary transfer opposing roller, and a gear on a drive roller shaft (not shown). The intermediate transfer belt101is rotated by the drive roller116, the gear on the drive roller shaft, and a drive gear (also not shown) on the main body. A secondary transfer roller117is provided opposite to the drive roller116across the intermediate transfer belt101. The drive roller116and the secondary transfer roller117form a secondary transfer unit. The secondary transfer unit is configured to convey the recording material while nipping the recording material and the intermediate transfer belt101between the drive roller116and the secondary transfer roller117, to thereby transfer the toner images on the intermediate transfer belt101onto the recording material.

An optical sensor140is provided downstream of the image forming unit103K and upstream of the secondary transfer unit in the rotation direction of the intermediate transfer belt101. The optical sensor140is configured to read an image for measurement formed on the intermediate transfer belt101at the time of, for example, image density correction or color misregistration correction.

The fixing unit400is provided downstream of the secondary transfer roller117in a conveyance direction of the recording material. The fixing unit400includes a fixing roller118and a pressure roller119. The fixing roller118is heated by a fixing heater described below. The fixing unit400is configured to apply heat and pressure to the recording material having transferred thereonto the toner image, through use of the fixing roller118and the pressure roller119, so as to fix the image to the recording material. The recording material is a sheet-like recording medium to be fed from a sheet feeding cassette121or a manual feed tray122. On a conveyance path for feeding the recording material, at least registration rollers123and delivery rollers124are provided. The registration rollers123serve to convey the recording material to the secondary transfer unit. The delivery rollers124serve to discharge to a discharge tray125the recording material having the image formed thereon. The registration rollers123are configured to correct, for example, skew of the recording material, and convey the recording material to the secondary transfer unit in accordance with a timing at which the toner image formed on the intermediate transfer belt101is conveyed to the secondary transfer unit.

The image forming apparatus100having the above-mentioned configuration performs image forming processing as follows in response to an instruction to form an image, which is given by a user with the UI126. In this example, a description is given of copying processing for forming on the recording material an image of the original read by the image reading apparatus120. With regard to the image forming units103Y,103M,103C, and103K, Y, M, C, and K suffixed to respective reference symbols are omitted in a case where color identification is not required in the following description. With regard to each photosensitive drum104or other components as well, Y suffixed to reference symbols is omitted in the following description.

When receiving the instruction to form an image (to execute copying processing), the image forming apparatus100causes the image reading apparatus120to read an image of the original. The image reading apparatus120generates image data indicating the read image and then transmits the data to the image forming apparatus100. The image data is generated for each color, that is, yellow, magenta, cyan, and black. When operating as a printer, the image forming apparatus100may obtain image data from an external device, such as a personal computer or a portable memory, to form an image.

The photosensitive drum104of the image forming unit103is rotated at a predetermined speed, and its surface is negatively charged uniformly by the charging device109. The laser exposure device108irradiates the photosensitive drum104with laser light modulated in accordance with the image data, to thereby form an electrostatic latent image on the photosensitive drum104. The developing device105causes toner to adhere onto the electrostatic latent image formed on the photosensitive drum104through application of a developing bias having the same polarity as the polarity (negative polarity) of the charged photosensitive drum104, to thereby form a toner image as a visible image. The toner image is transferred onto the rotationally driven intermediate transfer belt101by the photosensitive drum104and the primary transfer roller114applied with a primary transfer bias (opposite polarity (positive polarity) to that of the toner). On the intermediate transfer belt101, the toner images of different colors, that is, yellow, magenta, cyan, and black are successively transferred in a superimposed way. The transfer residual toner remaining on the photosensitive drum104is scraped off by, for example, a cleaner blade provided in each drum cleaner112, and collected.

The full-color toner image on the intermediate transfer belt101is conveyed to the secondary transfer unit by the rotation of the intermediate transfer belt101. In synchronization with a timing at which a tip end of each of the conveyed toner images reaches the transfer unit, the recording material fed from the sheet feeding cassette121or the manual feed tray122is conveyed by the registration rollers123to the secondary transfer unit. On the recording material conveyed to the secondary transfer unit, the full-color toner image on the intermediate transfer belt101is collectively transferred by the secondary transfer roller117applied with a secondary transfer bias (opposite polarity (positive polarity) to that of the toner). After the transfer, residual toner remaining on the intermediate transfer belt101is scraped off by a transfer cleaner107, and collected as waste toner.

The recording material having formed thereon the full-color toner image is conveyed to the fixing unit400, and at a fixing nip portion between the fixing roller118and the pressure roller119, heat and pressure are applied to the recording material having the full-color toner image formed thereon. As a result, the image is thermally fixed to the surface of the recording material. The recording material is discharged by the delivery rollers124onto the discharge tray125provided at an upper surface of the main body. Through the above-mentioned operations, a series of procedures of image forming processing (copying processing) is completed.

Control Board

FIG. 2is an explanatory diagram of a control board configured to control an operation of the image forming apparatus100. A control board200is a controller configured to centrally control the operation of the image forming apparatus100to convey a recording material, form, transfer, and fix an image, and perform other such processing. To that end, the control board200drives each load included in the image forming apparatus100, collects and analyzes information through use of sensors, and exchanges data with the UI126. The control board200is connected to the UI126, a high-voltage unit500, a motor211, a clutch212, a solenoid213, the fixing unit400, and sensors214. The motor211is a drive source for rotating the photosensitive drum104Y. The high-voltage unit500includes a high-voltage controller501. The high-voltage controller501controls the generation of a high voltage to be used by, for example, the charging device109, and the application of the high voltage by the charging device109. The fixing unit400includes a fixing heater401and a thermistor402.

The control board200includes a central processing unit (CPU)201, a read only memory (ROM)202, and a random access memory (RAM)203. The CPU201uses the RAM203as a work area to execute a computer program stored in the ROM202, to thereby control the operation of the image forming apparatus100. Meanwhile, the ROM202stores, for example, a high-voltage set value for the high-voltage controller501, various kinds of data, and information input from the UI126.

As described above, the UI126is configured to receive an instruction from a user and provide information to the user. For example, the UI126receives a copy magnification, a density set value, and other such information set by the user. The UI126also outputs information for presenting to the user a state of the image forming apparatus100, for example, the number of images to be formed, a status of whether or not an image is being formed, an occurrence of a jam, and a location thereof.

The DC loads including the motor211, the clutch212, and the solenoid213and the sensors214including a photo interrupter and a microswitch are arranged at various places inside the image forming apparatus100. When the motor211is driven while the clutch212and the solenoid213are appropriately driven, a recording material is conveyed and each unit is driven. The sensors214are used for monitoring the conveyance of a recording material and the driving of each unit.

The control board200includes a load controller208configured to control the driving of the motor211, the clutch212, and the solenoid213. The control board200also includes a sensor interface (I/F)209configured to obtain a detection result (detection signal) from each of the sensors214and transmit the detection result to the CPU201. The CPU201controls the driving of the motor211, the clutch212, and the solenoid213by the load controller208based on the detection results (detection signals) obtained from the sensors214. Through the control of the driving of the motor211, the clutch212, and the solenoid213, operations of an image forming motor unit and a toner supply motor unit are controlled. The image forming motor unit is configured to drive the photosensitive drum104, the intermediate transfer belt101, and other such components. The toner supply motor unit is configured to drive the toner containers130Y,130M,130C, and130K.

The CPU201transmits various high-voltage control signals to the high-voltage controller501of the high-voltage unit500. The high-voltage controller501causes, for example, the charging device109to apply an appropriate high voltage. The CPU201controls power supply to the fixing heater401included in the fixing unit400. The thermistor402is configured to measure a temperature inside the fixing unit400. The CPU201monitors the temperature inside the fixing unit400through use of the thermistor402, and controls an amount of power being supplied to the fixing heater401based on the temperature, to thereby control the temperature in the fixing unit400.

Arrangement of Control Board

FIG. 3is a diagram for illustrating an arrangement of the respective units in the image forming apparatus100.FIG. 3is a back view of the image forming apparatus100in a case whereFIG. 1is assumed to be a front view of the image forming apparatus100. The image forming apparatus100includes a control unit250, the high-voltage unit500, the fixing unit400, and a power supply unit600. The power supply unit600converts power supplied from a commercial power supply into an internal voltage to be used by each unit included in the image forming apparatus100. The power supply unit600supplies the internal voltage to each unit included in the image forming apparatus100. The control unit250includes the control board200.

The power supply unit600is provided at the lowermost part of the image forming apparatus100. The control unit250and the high-voltage unit500are provided immediately above the power supply unit600. The control unit250and the high-voltage unit500are arranged side by side in the horizontal direction. The fixing unit400is provided above the control unit250. The control unit250is provided between the fixing unit400and the high-voltage unit500in order to control operations of the fixing unit400and the high-voltage unit500.

Support Member

FIG. 4is an explanatory view of the control unit250. The control unit250has a configuration in which the control board200is attached to a support member300. The control board200is attached and fixed to the support member300, and is then mounted to or incorporated into the image forming apparatus100.

The support member300is made of a single metal plate, and includes an attachment surface304and at least one board support portion303for fixing the control board200. In addition, the support member300has side walls301formed by bending the metal plate at its end portions. For example, the support member300may be injection-molded through use of a resin. The attachment surface304serves as a surface for placing the control board200. The attachment surface304is formed in a shape corresponding to the shape of the control board200. The board support portion303is provided at a position corresponding to a position of an attachment portion2001on the control board200side, and the number of board support portions303corresponds to the number of attachment portions2001. The side wall301is a protective member for preventing an end portion of the control board200from being brought into contact with another unit (for example, the power supply unit600or the high-voltage unit500) adjacent thereto when the control unit250is mounted to the image forming apparatus100. The side walls301in at least one embodiment are provided so as to surround the control board200placed on the attachment surface304, but there may be a side on which no side wall is formed depending on a situation around the position at which the control board200is incorporated. That is, the side wall301is not limited to being formed so as to surround four sides of the control board200placed on the attachment surface304. The side wall301is only required to be provided on at least a part of the four sides of the control board200placed on the attachment surface304. In addition, the heights of the side walls301are not required to be all the same, and may be appropriately determined depending on another unit adjacent thereto.

FIG. 5is a view for illustrating a configuration of the control unit250in a state in which the control board200is attached to the support member300. Various electronic components are mounted to the control board200. The electronic components include, for example, a connector. The control board200has connectors302ato302kmounted near the end portions. Connectors of cables for electrically connecting another unit (power supply unit600, fixing unit400, or high-voltage unit500) to the control board200are inserted into or removed from the connectors302ato302k. For example, the connector of the cable for electrically connecting the motor211, which is illustrated inFIG. 2, to the control board200is inserted into the connector302a. Further, for example, the connector of the cable for electrically connecting the fixing heater401and the thermistor402, which are illustrated inFIG. 2andFIG. 3, to the control board200is inserted into the connector302h. The attachment portion2001of the control board200is fixed to the board support portion303with a screw. Side walls301ato301dof the support member300are configured to cover the periphery of the attached control board200. A distance from the connectors302hto302jto the side wall301bis X1. A distance from the connectors302eand302gto the side wall301ais X2. A distance from the connectors302ato302dto the side wall301dis X3. A distance from the connectors302fand302kto the side wall301cis X4.

FIG. 6show explanatory views of a relationship between the connector302of the control board200and the side wall301of the support member300. In this case, a description is given with reference to a back view and a cross-sectional view of the control unit250. InFIG. 6, a relationship among a distance X from the end portion of the connector302of the control board200to the side wall301, a height Y of the side wall301, a height C of the connector302, and a height a from the bottom surface of the support member300to the upper surface of the control board200is indicated. In order to achieve satisfactory workability of insertion into and removal from the connector302, it suffices that the connector302is located at a position higher than the side wall301and the height of the side wall301is large enough to prevent the side wall301from interfering with a worker's hand or an automatic machine. The side wall301is fixed to a mounting portion900on the image forming apparatus100side, which has its upper part located at the same height as the upper part of the side wall301with a fixing screw.

FIG. 7is an explanatory graph for showing workability of insertion and removal. The side wall301is provided for the purpose of preventing another unit (for example, the power supply unit600or the high-voltage unit500) adjacent thereto from being brought into contact with the end portion of the control board200, but adversely affects the workability of insertion into and removal from the connector302. In order to achieve satisfactory workability of insertion into and removal from the connector302, it is preferred that the distance X from the end portion of the connector302to the side wall301be large and the height Y of the side wall301be small. Meanwhile, as the distance X from the end portion of the connector302to the side wall301becomes smaller and the height Y of the side wall301becomes larger, the workability of insertion into and removal from the connector302becomes lower. In other words, the workability of insertion into and removal from the connector302is expressed by the following relationship between the distance X from the end portion of the connector302to the nearest side wall301from the connector302and the height Y of the side wall301.
Y<2*X: Satisfactory workability
Y≥2*X: Poor workability

In addition, in order to achieve satisfactory workability of insertion into and removal from the connector302while preventing the end portion of the control board200from being brought into contact with another unit, the distance X from the end portion of the connector302to the side wall301and the height Y of the side wall301are required to have the following relationship.
α<Y<C+α
X<50 mm

The specific value of the distance X from the end portion of the connector302to the side wall301is not limited to 50 mm, and may be any distance that enables interference with a worker's hand or an automatic machine to be avoided while preventing another unit from being brought into contact with the control board200. Therefore, in order to satisfy a requirement for preventing the end portion of the control board200from being brought into contact with another part and a requirement for the workability of insertion into and removal from the connector302, it suffices that the following relationship is satisfied.
α<Y<C+α
Y<2*X(X<50 mm)

That is, the height Y of the side wall301is larger than the height a from the bottom surface of the support member300to the upper surface of the control board200, is smaller than the sum of the height a and the height C of the connector302, and is smaller than twice the distance X from the connector302to the nearest side wall301. The distance X from the connector302to the side wall301is smaller than 50 mm.

In the example ofFIG. 7, in an area A1, the requirement for preventing the end portion of the control board200from being brought into contact with another part and the requirement for the workability of insertion into and removal from the connector302are satisfied. That is, the area A1satisfies α<Y<C+α and Y<2*X. In an area A2, the requirement for the workability of insertion into and removal from the connector302is not satisfied. That is, the area A2does not satisfy Y<2*X. In an area A3, the requirement for preventing the end portion of the control board200from being brought into contact with another part is not satisfied. That is, the area A3does not satisfy α<Y<C+α.

The support member300in at least one embodiment described above has a configuration in which the distance X from the end portion of the connector302to the side wall301and the height Y of the side wall301are appropriately set, to thereby prevent the end portion of the control board200from being brought into contact with another part and achieve satisfactory workability of insertion into and removal from the connector302. Specifically, in a case where the distance X from the end portion of the connector302to the side wall301and the height Y of the side wall301satisfy such a relationship as indicated by the area A1ofFIG. 7, the end portion of the control board200is prevented from being brought into contact with another part, and satisfactory workability of insertion into and removal from the connector302is achieved.

The image forming apparatus100has been described above as an example, but at least one embodiment is also applicable to a post-processing apparatus configured to perform, for example, bookbinding, insertion, punching, and stapling, and an apparatus configured to perform predetermined processing, for example, a sheet feeding apparatus such as a deck. At least one embodiment is further applicable not only to the control board200but also to a support member for incorporating or mounting another board into/to the apparatus.

Modification Example of Support Member

FIG. 8is an explanatory view of the control unit251in a modification example of the present disclosure.FIG. 9is a view for illustrating a configuration of the control unit251in the modification example. When compared to the support member300of the control unit250illustrated inFIG. 4andFIG. 5, the support member350illustrated inFIG. 8andFIG. 9further includes a fixing portion700. The fixing portion700is provided to at least one of the plurality of side walls301. The fixing portion700is used to fix the control unit251to the main body (casing) of the image forming apparatus100.

FIG. 10show explanatory views of a relationship between the connector302eof the control board200and the side wall301aof the support member350. The fixing portion700is provided to the side wall301a. In the same manner as in the case ofFIG. 6, a description is given with reference to a back view and a cross-sectional view of the control unit251. InFIG. 10, a relationship among a distance X2from the end portion of the connector302eof the control board200to the side wall301a, a height Y2of the side wall301a, the height C of the connector302e, and the height a from the bottom surface of the support member350to the upper surface of the control board200is indicated.

The side wall301ais connected to the fixing portion700formed of two cranks in order to avoid another component980provided in the vicinity. The fixing portion700is fixed to the mounting portion900on the casing of the image forming apparatus100with the fixing screw950. Thus, the control board200is mounted to the image forming apparatus100. In this case, the height Y2of the side wall301ais smaller than the height C of the connector302e, and hence a worker's hand or an automatic machine does not interfere with the side wall301aat the time of insertion into or removal from the connector302e. Therefore, the worker's workability of the insertion and removal is kept satisfactory. The fixing portion700may also be formed unitarily with the side wall301a, and may be formed by bending an edge portion of the side wall301athree times.

In addition, in order to achieve satisfactory workability of insertion into and removal from the connector302ewhile preventing the end portion of the control board200from being brought into contact with another unit, the distance X2from the end portion of the connector302eto the side wall301aand the height Y2of the side wall301aare required to have the following relationship.
α<Y2<C+α
X2<50 mm

The specific value of the distance X2from the end portion of the connector302eto the side wall301ais not limited to 50 mm, and may be any distance that avoids interference with a worker's hand or an automatic machine. Therefore, in order to satisfy a requirement for preventing the end portion of the control board200from being brought into contact with another part and a requirement for the workability of insertion into and removal from the connector302e, it suffices that the following relationship is satisfied.
α<Y2<C+α
Y2<2*X2(X<50 mm)

As long as the other side walls301bto301dand the connectors302ato302dand302fto302khave such a relationship as described with reference toFIG. 6andFIG. 7, the end portion of the control board200is prevented from being brought into contact with another part, and satisfactory workability of insertion into and removal from the connector302eis maintained.

The support member350described above includes the fixing portion700, to thereby function as a fixing tool with respect to a nearby member. Even in this case, the end portion of the control board200is prevented from being brought into contact with another part, and the workability of insertion into and removal from the connector302becomes satisfactory. Consequently, at least one embodiment of the present disclosure facilitates the insertion into and removal from the connector302while preventing the control board200mounted to the support member350from hitting an apparatus main body during mounting work of mounting the control board200to the apparatus main body.

This application claims the benefit of Japanese Patent Application No. 2019-103501, filed Jun. 3, 2019, which is hereby incorporated by reference herein in its entirety.