Liquid dispensing device

Abstract

To solve the problem in which, in a configuration in which a wiping member moves in a direction along an ink ejection surface of an ink ejection head, a moving area for the wiping member has to be secured even outside an ink ejection area, with the result that a device is easily increased in size in the moving direction of the wiping member.SOLUTION: A liquid ejection device includes: a liquid ejection head that ejects liquid to a medium; a wiping mechanism that wipes a liquid ejection surface of the liquid ejection head, the wiping mechanism having a wiper portion that wipes the liquid ejection surface by moving in a direction along the liquid ejection surface; and an electronic portion that is a portion related to control of the device and includes at least one circuit board, wherein a moving direction of the wiper portion is a direction crossing a surface of the circuit board, and wherein at least a part of the electronic portion and a part of the wiping mechanism overlap in the moving direction of the wiper portion.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention relates to a liquid ejection device that ejects liquid onto a medium. [Background technology]

[0002] Inkjet printers, one example of liquid ejection devices, are provided with a wiping mechanism that wipes the ink ejection surface of an ink ejection head. In the inkjet printer described in Patent Document 1, the wiper is called a wiping member, and this wiping member is provided in a wiping unit. The wiping unit is powered by a motor and moves in a direction along the ink ejection surface of the ink ejection head, wiping the ink ejection surface of the ink ejection head during the movement. This inkjet printer has a cover on the back, and the wiping member can be accessed by opening this cover. The wiping member is fixed to the wiping unit by screws, and the wiping member can be removed from the device by removing the screws. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-175275 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a configuration in which the wiping member moves in a direction along the ink ejection surface of the ink ejection head as described above, it is necessary to ensure a movement area for the wiping member outside the ink ejection area, which tends to make the device larger in the movement direction of the wiping member. [Means for solving the problem]

[0005] In order to solve the above problems, the liquid ejection device of the present invention comprises a liquid ejection head which ejects liquid onto a medium, a wiping mechanism which wipes the liquid ejection surface of the liquid ejection head, the wiping mechanism having a wiper part which wipes the liquid ejection surface by moving in a direction along the liquid ejection surface, and an electrical component part which is a part involved in controlling the device and includes at least one circuit board, wherein the movement direction of the wiper part is a direction which intersects with the surface of the circuit board, and in the movement direction of the wiper part, at least a portion of the electrical component part and a portion of the wiping mechanism overlap. [Brief description of the drawings]

[0006] [Figure 1] FIG. 2 is a diagram showing a medium transport path in the printer. [Diagram 2] FIG. 2 is a diagram showing a medium transport path in the printer. [Diagram 3] FIG. 2 is a perspective view showing the rear side, which is one of the sides of the printer. [Figure 4] 4 is a perspective view showing a state in which the connection portion cover is opened from the state shown in FIG. 3; FIG. [Diagram 5] 4 is a perspective view showing a state in which a rear cover is removed from the state shown in FIG. 3; [Figure 6] FIG. 6 is a perspective view showing a state in which the control unit is opened from the state shown in FIG. 5; [Figure 7] 7 is a perspective view of the wiping mechanism and its surroundings in a state where the high-pressure unit is removed from the state shown in FIG. 6; [Figure 8] 8 is a perspective view showing a state in which the connection unit is removed from the state shown in FIG. 7. [Figure 9] 1 is a perspective view of the power supply unit and the control unit in a state where the control unit is opened relative to the power supply unit. [Figure 10] 4 is a perspective view showing the positional relationship between a recess of the power supply unit and a connector for connecting the control unit. FIG. [Figure 11] FIG. 4 is a perspective view showing the internal configuration of the control unit. [Figure 12] 4 is a diagram showing a schematic diagram of the positional relationship between the electrical component section and the wiping mechanism when viewed from above the apparatus. FIG. [Figure 13] 4 is a diagram showing the positional relationship between an electrical component section, a high voltage unit, and a conveyor belt when viewed from the rear of the apparatus. FIG. [Figure 14] Cross-sectional view of the power supply unit and control unit taken along the YZ plane. [Figure 15] FIG. 11 is a front view of a main board and a drive board according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] The present invention will now be briefly described. The liquid ejection device of the first aspect comprises a liquid ejection head which ejects liquid onto a medium, a wiping mechanism which wipes the liquid ejection surface of the liquid ejection head, the wiping mechanism having a wiper part which wipes the liquid ejection surface by moving in a direction along the liquid ejection surface, and an electrical component part which is involved in controlling the device and includes at least one circuit board, wherein the movement direction of the wiper part is a direction which intersects with the surface of the circuit board, and in the movement direction of the wiper part, at least a portion of the electrical component part and a portion of the wiping mechanism overlap.

[0008] According to this aspect, at least a portion of the electrical component and a portion of the wiping mechanism overlap in the movement direction of the wiper unit, thereby reducing the dimensions of the device in the movement direction of the wiper unit and making the device more compact. In addition, the overlap of at least a part of the electrical component part and a part of the wiping mechanism in the moving direction of the wiper part can also be said to mean that the position of at least a part of the electrical component part and the position of a part of the wiping mechanism are the same in the moving direction of the wiper part. Alternatively, the overlap of at least a part of the electrical component part and a part of the wiping mechanism in the moving direction of the wiper part can also be said to mean that at least a part of the electrical component part and a part of the wiping mechanism appear to overlap when viewed from a direction intersecting the moving direction of the wiper part.

[0009] The second aspect is characterized in that, in the first aspect, the wiper section is movable between a home position and a wiping area where the wiper section wipes the liquid ejection surface, and when the wiper section is positioned at the home position, at least a portion of the electrical component section and at least a portion of the wiper section overlap.

[0010] According to this aspect, the wiper section is movable between a home position and a wiping area where it wipes the liquid ejection surface, and when the wiper section is located at the home position, at least a portion of the electrical component section and at least a portion of the wiper section overlap, thereby achieving the effect of the first aspect described above.

[0011] A third aspect is characterized in that in the first or second aspect, the moving direction of the wiper portion is a depth direction of the device. According to this aspect, the movement direction of the wiper portion is the depth direction of the device, so that the device dimensions in the depth direction of the device can be reduced.

[0012] The fourth aspect is characterized in that, in the third aspect, the electrical equipment unit is located toward the rear in the depth direction of the device, the circuit boards are arranged at intervals along the movement direction of the wiper unit, the multiple circuit boards include a power supply board and a control board, the power supply board is provided in a power supply unit which is a unit constituting the electrical equipment unit, and the control board is provided in a control unit which is a unit constituting the electrical equipment unit and is located toward the rear of the device from the power supply unit. According to this aspect, in a configuration in which a power supply board and a control board are provided along the movement direction of the wiper portion, the dimensions of the device in the device depth direction can be reduced.

[0013] A fifth aspect is characterized in that in the fourth aspect, a rear cover forming a rear surface of the device is provided removably, and by removing the rear cover, the wiping mechanism and the control unit are exposed. According to this aspect, the wiping mechanism and the control unit are exposed by removing the rear cover that forms the rear surface of the device, so that maintenance of the wiping mechanism and the control unit, i.e., the electrical equipment, is improved.

[0014] A sixth aspect is characterized in that, in the fifth aspect, the power supply unit is removable, the control unit is arranged to be openable and closable, and by opening the control unit from a closed state, the power supply unit is exposed and the power supply unit becomes removable. According to this aspect, the control unit is configured to be openable and closable, and by opening the control unit from a closed state, the power supply unit is exposed and can be attached or detached. Therefore, no storage space is required for the control unit when attaching or detaching the power supply unit, and workability is improved when attaching or detaching the power supply unit.

[0015] The seventh aspect is characterized in that, in any of the first to sixth aspects, a high-voltage board that handles higher voltages than the electrical equipment unit is provided outside the electrical equipment unit in a direction intersecting the movement direction of the wiper unit relative to the electrical equipment unit. According to this aspect, a high-voltage board that handles higher voltages than the electrical equipment unit is provided outside the electrical equipment unit in a direction that intersects with the movement direction of the wiper unit relative to the electrical equipment unit, thereby suppressing the adverse effects of noise generated from the high-voltage board on the electrical equipment unit.

[0016] The eighth aspect is characterized in that, in the seventh aspect, a conveyor belt for conveying a medium is provided, the conveyor belt being arranged in a position opposite the liquid ejection head, and the high-voltage substrate is a substrate for controlling the charging of the conveyor belt, and the high-voltage substrate is located to the side of the conveyor belt. According to this aspect, the high-voltage substrate is a substrate that controls the charging of the conveying belt, and since the high-voltage substrate is positioned to the side of the conveying belt, the distance between the high-voltage substrate and the conveying belt can be shortened, and thus the wiring required to charge the conveying belt can be shortened.

[0017] A ninth aspect is characterized in that, in any of the first to eighth aspects, a head drive board that drives the liquid ejection head is provided outside the electrical equipment section and above the liquid ejection head.

[0018] According to this aspect, the head drive board that drives the liquid ejection head is provided outside the electrical equipment section and above the liquid ejection head, thereby suppressing the adverse effects of noise generated by the electrical equipment section on the drive board.

[0019] A tenth aspect of the present invention is characterized in that in any one of the first to third aspects, a cutout portion is formed in the circuit board to avoid the wiping mechanism. According to this aspect, a cutout portion is formed in the circuit board to avoid the wiping mechanism, i.e., the circuit board is positioned to effectively utilize the space around the wiping mechanism, thereby enabling the device to be made smaller.

[0020] The present invention will be specifically described below. In the following, an inkjet printer 1 that performs recording by ejecting ink, which is an example of a liquid, onto a medium such as recording paper will be described as an example of a liquid ejection device or a recording device. In the following, the inkjet printer 1 will be abbreviated to printer 1. The XYZ coordinate system shown in each figure is an orthogonal coordinate system, and the Y-axis direction is a direction intersecting the medium transport direction, i.e., the medium width direction, and also the device depth direction. In this embodiment, the Y-axis direction is also the movement direction of wiper unit 43, which will be described later. In the Y-axis direction, the +Y direction is the direction from the front of the device to the rear of the device, and the -Y direction is the direction from the rear of the device to the front of the device.

[0021] The X-axis direction is the width direction of the device, and as seen by the operator of the printer 1, the +X direction is the left side and the -X direction is the right side. The Z-axis direction is the vertical direction and is the height direction of the device. Within the Z-axis direction, the +Z direction is the upward direction and the -Z direction is the downward direction. In the following, the direction in which the medium is transported may be referred to as "downstream," and the opposite direction may be referred to as "upstream." In addition, the medium transport path is shown by a dashed line in Figures 1 and 2. In the printer 1, the medium is transported through the medium transport path shown by the dashed line.

[0022] 1 and 2, the F-axis direction is the medium transport direction between a line head 51 and a transport belt 13, which will be described later, i.e., in the recording area, with the +F direction being downstream in the transport direction and the opposite -F direction being upstream in the transport direction. The V-axis direction is perpendicular to the F-axis direction and is the movement direction of a head unit 50, which is an example of a recording section, which will be described later. The +V direction of the V-axis direction is the direction in which the head unit 50 retreats from the transport path T1 during recording, and the -V direction is the direction in which the head unit 50 moves toward the transport path T1 during recording.

[0023] The medium transport path in the printer 1 will be described below with reference to Figures 1 and 2. The printer 1 is configured so that an add-on unit 6 can be connected to the bottom of the device main body 2, and Figures 1 and 2 show the state in which the add-on unit 6 is connected. The device main body 2 is provided with a first media cassette 3 for storing media at the bottom, and when an extension unit 6 is connected, a second media cassette 4 and a third media cassette 5 are further provided below that.

[0024] A pick roller that feeds the stored medium in the -X direction is provided for each medium cassette. Pick rollers 21, 22, and 23 are provided for the first medium cassette 3, the second medium cassette 4, and the third medium cassette 5, respectively. Further, a pair of feed rollers is provided for each medium cassette, which feeds the medium sent in the -X direction in an upward diagonal direction. Feed roller pairs 25, 26, and 27 are provided for the first medium cassette 3, the second medium cassette 4, and the third medium cassette 5, respectively. In the following, unless otherwise specified, a "roller pair" is defined as consisting of a drive roller driven by a motor (not shown) and a driven roller that rotates in contact with the drive roller.

[0025] The medium sent out from the third media cassette 5 is transported by the transport roller pair 29, 28 to the transport roller pair 38. The medium sent out from the second media cassette 4 is transported by the transport roller pair 28 to the transport roller pair 38. The medium is nipped by the transport roller pair 38 and sent to the transport roller pair 31. The medium sent out from the first medium cassette 3 is sent to the transport roller pair 31 without passing through the transport roller pair 38. The supply roller 19 and the separation roller 20 provided near the transport roller pair 38 are a roller pair that feeds the medium from a supply tray not shown in FIG.

[0026] The medium receiving the feeding force from the transport roller pair 31 is sent to a recording position between the line head 51, which is an example of a liquid ejection head, and the transport belt 13, that is, facing the line head 51. Note that hereinafter, the medium transport path from the transport roller pair 31 to the transport roller pair 32 is referred to as a transport path T1 during recording.

[0027] The line head 51 constitutes the head unit 50, which is an example of a recording section that records on a medium. The line head 51 performs recording by ejecting ink, which is an example of liquid, onto the surface of the medium. The line head 51 is an ink ejection head configured so that nozzles that eject ink cover the entire area in the width direction of the medium, and is configured as an ink ejection head that can record over the entire width of the medium without moving in the width direction of the medium.

[0028] The head unit 50 is provided so as to be movable forward and backward relative to the transport path T1 during recording by a rack and pinion mechanism and a motor (not shown), and is provided so as to be movable between a position where it is furthest advanced into the transport path T1 during recording and a position where it is furthest retracted from the transport path T1 during recording. Fig. 1 shows a state in which the head unit 50 is furthest advanced into the transport path T1 during recording, and in this state, recording is performed on the medium. Fig. 2 shows the position of the head unit 50 when wiping the ink ejection surface 51a of the line head 51. The ink ejection surface 51a is an example of a liquid ejection surface.

[0029] Reference numeral 43 denotes a wiper portion, and reference numeral 44 denotes a wiper provided on the wiper portion 43. The wiper 44 is formed of an elastic material such as rubber or elastomer, and can press against the ink ejection surface 51a by its elasticity. The wiper unit 43 is movable in the Y-axis direction, which is an example of a direction along the ink ejection surface 51a, by a motor 46 (see Figure 7).The end position in the +Y direction of the movement range is the home position, and the wiper unit 43 is located at the home position except when wiping.

[0030] 7, a connection unit 45 is disposed at the home position of the wiper unit 43. The connection unit 45 is included in the wiping mechanism 42 together with the wiper unit 43. The device body 2 is equipped with a moving means (not shown) for moving the wiper unit 43 along the Y-axis direction. This moving means (not shown) is formed of, for example, a guide rail. This moving means may be regarded as a component of the wiping mechanism 42. Unlike the wiper portion 43, the connection unit 45 is provided in a fixed state. A suction needle (not shown) is provided in the connection unit 45, and when the wiper portion 43 moves to the home position, the suction needle enters a suction hole (not shown) on the side of the wiper portion 43. The wiper portion 43 is provided with a storage portion (not shown) for storing ink. The suction needle is connected to a pump (not shown), and therefore, when the wiper portion 43 moves to the home position, the pump can suck up and recover ink that has accumulated inside the wiper portion 43.

[0031] 1 and 2, reference numerals 10A, 10B, 10C, and 10D denote ink storage units serving as liquid storage units. Ink ejected from the line head 51 is supplied from each ink storage unit to the line head 51 via a tube (not shown). The ink storage units 10A, 10B, 10C, and 10D are detachably provided in the mounting units 11A, 11B, 11C, and 11D, respectively. Reference numeral 12 denotes a waste liquid storage section that stores ink as waste liquid discharged from the line head 51 toward a flushing cap (not shown) for maintenance purposes.

[0032] The conveyor belt 13 is provided at a position facing the line head 51. The conveyor belt 13 is an endless belt that is wound around a pulley 14 and a pulley 15, and rotates when at least one of the pulleys 14 and 15 is driven by a motor (not shown). The medium is conveyed to a position facing the line head 51 while being attracted to the belt surface of the conveyor belt 13.

[0033] The conveyor belt 13 is an endless belt made of a base material such as urethane or rubber containing a conductive material, and a predetermined tension is applied to the conveyor belt 13 by a tensioner (not shown). A charging roller (not shown) is provided at a position facing the pulley 14 across the conveyor belt 13. This charging roller is in contact with the outer surface of the conveyor belt 13 and rotates in response to the rotation of the conveyor belt 13. A DC voltage is applied to the charging roller from a high voltage unit 90 (see FIG. 5), and the charging roller supplies charge to the portion in contact with the conveyor belt 13. For example, the charging roller supplies a positive charge to the conveyor belt 13, charging the outer surface of the conveyor belt 13 with a positive polarity. As a result, the outer surface of the conveyor belt 13 becomes an attraction surface that attracts the medium.

[0034] Next, the transport path T1 during recording, which passes through a position facing the line head 51, is configured to intersect both the horizontal and vertical directions and transport the medium upward. As a result, the V-axis direction, which is the movement direction of the head unit 50, also intersects both the horizontal and vertical directions, and the inclination angle α of the V-axis direction with respect to the horizontal direction is smaller than 45°, more specifically, approximately 15°. With this configuration, the horizontal and vertical sizes of the space required for moving head unit 50 can be balanced, and the device can be prevented from becoming excessively large in both the horizontal and vertical directions. Incidentally, the present invention is not limited to the above configuration, and the V-axis direction may be parallel to the horizontal direction, or the V-axis direction may be parallel to the vertical direction.

[0035] Also, a discharge tray 8 is provided in the +Z direction from the head unit 50, and forms a support surface 8b that supports the medium discharged from the medium transport path, and the support surface 8b extends along the V-axis direction which is the movement direction of the head unit 50. This prevents wasted space from being formed in the relationship between the discharge tray 8 and the movement area of ​​the head unit 50, making it possible to prevent the device from becoming larger. Furthermore, since a portion of the head unit 50 overlaps with the ink containing portions 10A to 10B in the Z-axis direction, the device dimensions in the Z-axis direction can be reduced.

[0036] Next, the medium on whose first side recording has been performed by the line head 51 is sent further upward by the transport roller pair 32 located downstream of the transport belt 13. A flap 41 is provided downstream of the transport roller pair 32, and the transport direction of the medium is switched by this flap 41. When the medium is to be discharged as is, the transport path of the medium is switched by the flap 41 to face the upper transport roller pair 35, and the medium is discharged by the transport roller pair 35 toward the discharge tray 8.

[0037] When recording is to be performed on the second side of the medium in addition to the first side, the transport direction of the medium is directed to branch position K1 by flap 41. The medium then passes through branch position K1 and enters switchback path T2. In this embodiment, switchback path T2 is the medium transport path above branch position K1. A pair of transport rollers 36, 37 is provided on switchback path T2. The medium that enters switchback path T2 is transported upward by the pair of transport rollers 36, 37, and when the bottom edge of the medium passes branch position K1, the rotation direction of the pair of transport rollers 36, 37 is switched, thereby transporting the medium downward.

[0038] The switchback path T2 is connected to a reverse path T3. In this embodiment, the reverse path T3 is a medium transport path that extends from the branch position K1 through the transport roller pairs 33 and 34 to the transport roller pair 38. The medium conveyed downward from branch position K1 receives a conveying force from conveying roller pairs 33 and 34, reaches conveying roller pair 38, is curved and reversed, and is sent to conveying roller pair 31.

[0039] The medium is again sent to a position facing the line head 51, and the second side, which is opposite to the first side on which recording has already been performed, faces the line head 51. This makes it possible for the line head 51 to record on the second side of the medium.

[0040] Next, the electrical equipment section 60 provided on the rear side of the device will be described with reference to FIG. As shown in Fig. 3, a rear cover 56 is provided on the rear surface, which is one of the sides of the device body 2. The rear cover 56 is part of a housing that constitutes the outer shell of the device body 2. In Fig. 3, reference numeral 9 denotes a scanner unit provided on the upper portion of the device body 2, and reference numeral 7 denotes an operation panel provided on the upper front portion of the device body 2. The rear cover 56 is fixed to the apparatus body 2 by screws (not shown). That is, the rear cover 56 is provided detachably with respect to the apparatus body 2 .

[0041] An exhaust port 56b is formed in the upper part of the rear cover 56, and heat inside the power supply unit 80, which will be described later, is exhausted from the exhaust port 56b. Furthermore, a connection portion cover 57 is provided on the upper part of the rear cover 56 so as to be able to be opened and closed. When the connection portion cover 57 is opened, connector connection portions 58a, 58b are exposed as shown in Fig. 4. The connector connection portions 58a, 58b are connection portions for connecting a communication cable (not shown) for communicating with an external device in accordance with standards such as USB (Universal Serial Bus).

[0042] The connector connection portions 58a, 58b are provided in a recess 56a formed in the upper portion of the rear cover 56. A recess 59a is connected to the recess 56a in the -X direction, and a recess 59b is connected to the recess 59a in the -X direction. The recess 59b is formed to extend in the Z-axis direction on the side of the rear cover 56 in the -X direction, and the recess 59a is formed to extend obliquely upward from the upper end of the recess 59b and connect to the recess 56a.

[0043] The lower end of the recess 59b is connected to the recess 2a formed in the lower part of the side surface in the -X direction of the device body 2. The recess 2a is provided with an inlet 61, to which a power cable (not shown) is connected. With the above configuration, the communication cable (not shown) connected to the connector connecting parts 58a, 58b can be connected to the connector connecting parts 58a, 58b through the recess 2a, the recess 59b, and the recess 59a without protruding rearward from the rear cover 56, improving the aesthetic appearance of the device when wiring. In addition, the connection part cover 57 can be closed in this state, which also improves the aesthetic appearance of the device, and in addition, since there is no need to keep the connection part cover 57 open, the installation space of the device can be reduced. In addition, since the communication cable (not shown) to be connected to the connector connection portions 58a, 58b and the power cable to be connected to the inlet 61 extend outward from the same position on the device main body 2, the wiring can be easily handled.

[0044] 5 shows a state where the rear cover 56 has been removed. In this embodiment, the rear cover 56 is configured to be completely removable from the device body 2, but it may be configured to be rotatable relative to the device body 2 so that it can be opened and closed by rotating. In this case, the center of the rotation axis may be parallel to the Z-axis direction or parallel to the X-axis direction. 5, when rear cover 56 is removed, electrical equipment section 60, which is a section related to control of the device, is exposed. In this embodiment, when rear cover 56 is removed, wiping mechanism 42 and high voltage unit 90 are exposed.

[0045] In this embodiment, the electrical equipment section 60 includes a control unit 70 and a power supply unit 80 which is a unit located in the -Y direction relative to the control unit 70, that is, in front of the device. The control unit 70 has an exterior formed by a control unit housing 72, and includes a main board 71A and a drive board 71B inside the control unit housing 72 (see FIG. 13). The main board 71A and the drive board 71B are an example of a first circuit board. The main board 71A and the drive board 71B are also an example of a control board. The main board 71A and the drive board 71B are arranged so that their board surfaces are parallel to the XZ plane, and thus the board surfaces are perpendicular to the Y-axis direction.

[0046] The main board 71A is equipped with a microcontroller and memory (not shown), and is responsible for overall control of the printer 1. The drive board 71B is equipped with driver circuits that drive each motor, and is electrically connected to the main board 71A by connecting means (not shown). Control unit 70 also has an image processing board 65 on the +Y side. Image processing board 65 is a board equipped with integrated circuits for image processing, and is provided so as to be exposed on the +Y surface of control unit housing 72. Image processing board 65 is connected to main board 71A inside control unit 70 by a cable (not shown).

[0047] The power supply unit 80 is externally configured with a first housing 82A and a second housing 82B (see FIG. 11). The first housing 82A and the second housing 82B are both tray-shaped, and when they are stacked together, they form a box-shaped housing as a whole. A power supply board 81 is provided inside the first housing 82A and the second housing 82B. The power supply board 81 is a board located in the -Y direction, i.e., on the inside of the device, from the main board 71A and the drive board 71B, and is an example of a second circuit board provided in a position along the surfaces of the main board 71A and the drive board 71B. That is, the power supply board 81 is disposed so that the board surface is parallel to the XZ plane, similar to the main board 71A and the drive board 71B, and the board surface is perpendicular to the Y-axis direction.

[0048] 11, the power supply board 81 is equipped with electronic components that adjust the voltage of the power supplied to each component of the printer 1. The electronic component indicated by the reference numeral 86 in Fig. 11 is one of the electronic components provided on the power supply board 81. A heat sink 85 is provided on the electronic component 86, and the heat sink 85 promotes the release of heat generated by the electronic component 86.

[0049] 11, an exhaust fan 84 is provided on the power supply board 81, and this exhaust fan 84 creates an airflow indicated by the arrow Fr inside the power supply unit 80. This causes heat inside the power supply unit 80 to be guided to the exhaust port 56b (see FIG. 4) via the exhaust duct 79, and is then discharged to the outside of the device from the exhaust port 56b. The exhaust duct 79 runs from the power supply unit 80, passing through the side of the control unit 70 in the +Z direction, toward the side of the device main body 2, i.e., the rear face. At the -Z direction end of the power supply unit 80, an opening 82a is formed by the first housing 82A and the second housing 82B as shown in FIG. 9, and outside air is taken into the power supply unit 80 from this opening 82a.

[0050] 5, the control unit 70 is rotatably provided on the device body 2 via a hinge portion 78, and opens and closes by rotating. In this embodiment, two hinge portions 78 are provided at the end in the +X direction of the rear surface of the device, spaced apart in the Z-axis direction. The center of the axis of rotation of the control unit 70 by the hinge portions 78 is parallel to the Z-axis direction. As a result, when the control unit 70 is opened from a closed state, it opens to the right as seen by a user positioned opposite the rear surface of the device, as shown by the change from FIG. 5 to FIG. 6. The center of the rotation axis of the control unit 70 is not limited to being parallel to the Z-axis direction, and may be parallel to, for example, the X-axis direction. Also, instead of providing the control unit 70 so as to be openable and closable relative to the device body 2, the control unit 70 may be provided so as to be detachable from the device body 2.

[0051] In this embodiment, control unit housing 72 constituting the outer shell of control unit 70 and high-voltage unit housing 92 constituting the outer shell of high-voltage unit 90 are connected by screws 74. Control unit 70 can be opened by removing screws 74.

[0052] The power supply unit 80 is fixed to the device body 2 by screws (not shown), and the power supply unit 80 can be removed from the device body 2 by removing the screws. However, the power supply unit 80 may also be provided rotatably with respect to the apparatus body 2, similar to the control unit 70. In this case, the center of the rotation axis may be parallel to the Z-axis direction, similar to the control unit 70, or may be parallel to the X-axis direction.

[0053] When control unit 70 is closed, a part of connection unit 45 constituting wiping mechanism 42 is exposed between control unit 70 and high-voltage unit 90. When control unit 70 is opened from this state and high-voltage unit 90 is removed, wiping mechanism 42 is largely exposed as shown in FIG. In this embodiment, high-pressure unit 90 is attached to apparatus body 2 with screws (not shown), but it may be provided rotatably with respect to apparatus body 2, similar to control unit 70. In this case, the center of the rotation axis may be parallel to the Z-axis direction, similar to control unit 70, or parallel to the X-axis direction. When high-pressure unit 90 is provided rotatably with respect to apparatus body 2, it is possible to configure the center of the rotation axis to be parallel to the Z-axis direction and to open to the left as seen by a user positioned opposite the rear of the apparatus.

[0054] The connection unit 45 constituting the wiping mechanism 42 can be removed by removing two screws 47 shown in Fig. 7, as shown in the change from Fig. 7 to Fig. 8. When the connection unit 45 is removed, the wiper part 43 equipped with the wiper 44 (see Fig. 2) can be largely exposed, and the wiper part 43 can be removed. Then, by removing the wiper part 43, the wiper 44 can be replaced.

[0055] Next, a configuration for reducing the distance in the Y-axis direction between the control unit 70 and the power supply unit 80 will be described with reference to FIG. 9 and subsequent figures. The power supply unit 80 is disposed so as to face the control unit 70 in the Y-axis direction. If the power supply unit 80 and the control unit 70 are to be electrically connected, a large space is required between the units to provide an electrical connection portion such as a connector, which tends to increase the size of the device in the Y-axis direction. Specifically, in FIG. 9, reference numeral 73 denotes a connector provided on the main board 71A, and a flexible flat cable (hereinafter referred to as "FFC") 66 extending from the power supply unit 80 is connected to this connector 73 as shown in FIG. 10. Considering the connection of the FFC 66 to the connector 73, it is necessary to ensure a gap between the control unit 70 and the power supply unit 80 in the Y-axis direction. In consideration of such problems, in this embodiment, the power supply unit 80 is provided with a recess 80a at a position facing the connector 73 on the surface facing the control unit 70.

[0056] As a result, in a configuration in which the control unit 70 and the power supply unit 80 are arranged facing each other, the space required for handling the FFC 66 after connecting the FFC 66 to the connector 73, i.e., the space between the control unit 70 and the power supply unit 80, can be reduced, and the size of the device in the Y-axis direction can be prevented from increasing. In this embodiment, the recess 80a is formed by providing a recess cover 83 in a cutout portion 82b formed in the first housing 82A. However, the present invention is not limited to this configuration, and the recess 80a may be formed directly in the first housing 82A. Also, the recess cover 83 may be omitted depending on the circumstances.

[0057] In this embodiment, the recess 80a extends in the X-axis direction, which is a direction intersecting the overlapping direction (Y-axis direction) of the control unit 70 and the power supply unit 80. This allows the FFC 66 to be wired inside the recess 80a, eliminating the need for space between the control unit 70 and the power supply unit 80 for wiring the FFC 66, and allowing the device to be made more compact.

[0058] 14, part of the recess 80a overlaps with part of an electronic component 87 provided on the power supply board 81 in the overlapping direction (Y-axis direction) of the control unit 70 and the power supply unit 80. Of the electronic components provided on the power supply board 81, the electronic component 87 is the component that protrudes most significantly in the +Y direction, and the thickness of the power supply unit 80 in the Y-axis direction depends on the dimensions of the electronic component 87. In this configuration, the range in the Y-axis direction indicated by the symbol W1 indicates the range in which the recess 80a and the electronic component 87 overlap in the Y-axis direction.

[0059] Incidentally, the overlap of a part of the recess 80a and a part of the electronic component 87 in the Y-axis direction can also be said to mean that the position of the part of the recess 80a in the Y-axis direction is the same as the position of the part of the electronic component 87. Alternatively, the overlap of a part of the recess 80a and a part of the electronic component 87 in the Y-axis direction can also be said to mean that the part of the recess 80a and the part of the electronic component 87 appear to overlap when viewed from the Z-axis direction, which is a direction intersecting the Y-axis direction. In this way, since a part of the recess 80a and a part of the electronic component 87 overlap in the Y-axis direction, the dimension of the power supply unit 80 in the Y-axis direction can be suppressed, and thus the dimension of the apparatus in the Y-axis direction can be suppressed.

[0060] Also, as described with reference to FIG. 11, the power supply unit 80 includes an exhaust fan 84 that generates an air flow inside the unit. And as shown in FIG. 14, the power supply substrate 81 is provided with a heat sink 85 at a position facing the back side of the recess 80a. That is, in the part of the power supply unit 80 where the recess 80a is provided, the space in the Y-axis direction is narrowed, and the flow velocity of the air flow (arrow Fr in FIG. 11) generated inside the unit by the exhaust fan 84 becomes faster than that in other parts. In FIG. 14, the dimension h1 is the distance between the back side of the first housing 82A and the heat sink 85, and the dimension h2 is the distance between the back side of the recess 80a (recess cover 83) and the heat sink 85, and they satisfy the relationship h2 < h1. With such a configuration, the flow velocity of the air flow at the part of the heat sink 85 becomes faster than that in other parts, and the heat dissipation efficiency of the heat sink 85 can be enhanced. Note that other heat-generating components may be arranged instead of the heat sink 85, or both other heat-generating components and the heat sink 85 may be arranged at positions facing the back side of the recess 80a.

[0061] Next, the positional relationship between the electrical equipment unit 60 including the control unit 70 and the power supply unit 80 and the wiping mechanism 42 will be described. As described above, the wiping mechanism 42 includes a wiper part 43 that wipes the ink ejection surface 51a of the line head 51 by moving along the Y-axis direction, and a connection unit 45 that is fixedly provided. The Y-axis direction is the direction intersecting the surfaces of these substrates of the main substrate 71A, the drive substrate 71B, and the power supply substrate 81. And as shown in FIG. 12, at least a part of the electrical equipment unit 60 and a part of the wiping mechanism 42 overlap in the Y-axis direction. Thereby, the dimension of the apparatus in the Y-axis direction, that is, the depth direction of the apparatus, can be suppressed.

[0062] More specifically, range La shown in FIG. 12 indicates the range occupied by the wiping mechanism 42 in the Y-axis direction. Range La includes the range (range Lb) occupied by the wiper unit 43 as the wiper unit 43 moves. In other words, range Lb corresponds to the movement area of ​​the wiper unit 43. Range Lc indicates the range occupied by the electrical equipment unit 60 in the Y-axis direction. As shown in the figure, part of range La includes part of range Lc. That is, the wiping mechanism 42 and the electrical equipment unit 60 overlap in the Y-axis direction. This overlapping range is indicated by the symbol Ld. In this manner, at least a portion of the electrical equipment unit 60 overlaps with a portion of the wiping mechanism 42 in the Y-axis direction. The form in which at least a portion of the electrical equipment unit 60 overlaps with a portion of the wiping mechanism 42 in the Y-axis direction includes a form in which a portion of the electrical equipment unit 60 overlaps with a portion of the wiping mechanism 42 in the Y-axis direction, as in this embodiment, and a form in which the entire electrical equipment unit 60 overlaps with a portion of the wiping mechanism 42 in the Y-axis direction.

[0063] Incidentally, the overlap of at least a part of the electrical equipment unit 60 and a part of the wiping mechanism 42 in the Y-axis direction can also be said to mean that the position of at least a part of the electrical equipment unit 60 and the position of a part of the wiping mechanism 42 are the same in the Y-axis direction. Alternatively, the overlap of at least a part of the electrical equipment unit 60 and a part of the wiping mechanism 42 in the Y-axis direction can also be said to mean that at least a part of the electrical equipment unit 60 and a part of the wiping mechanism 42 appear to overlap when viewed from the X-axis direction, which is a direction intersecting the Y-axis direction. Incidentally, in this embodiment, the configuration is such that at least a part of the electrical equipment unit 60 and a part of the wiping mechanism 42 appear to overlap when viewed from the X-axis direction, which is a direction intersecting the Y-axis direction, but the configuration may be such that at least a part of the electrical equipment unit 60 and a part of the wiping mechanism 42 appear to overlap when viewed from the Z-axis direction, which is a direction intersecting the Y-axis direction.

[0064] In this embodiment, a part of the electrical equipment section 60 and the entire connection unit 45 overlap in the Y-axis direction. Specifically, a part of the control unit 70 and the entire connection unit 45 overlap in the Y-axis direction. Note that a configuration may be adopted in which at least a part of the control unit 70 and at least a part of the connection unit 45 overlap in the Y-axis direction. In other words, a configuration may be adopted in which a part of the control unit 70 and a part of the connection unit 45 overlap in the Y-axis direction.

[0065] In this embodiment, the entire main substrate 71A and the drive substrate 71B overlap with a part of the connection unit 45 in the Y-axis direction. In addition, a configuration may be adopted in which at least a part of the main substrate 71A and at least a part of the connection unit 45 overlap in the Y-axis direction. That is, a configuration may be adopted in which a part of the main substrate 71A and at least a part of the connection unit 45 overlap in the Y-axis direction. Similarly, a configuration may be adopted in which at least a part of the drive substrate 71B and at least a part of the connection unit 45 overlap in the Y-axis direction. That is, a configuration may be adopted in which a part of the drive substrate 71B and at least a part of the connection unit 45 overlap in the Y-axis direction.

[0066] In this embodiment, a part of the movement area of ​​the wiper portion 43 overlaps with at least a part of the power supply unit 80 in the Y-axis direction. Specifically, in this embodiment, the range Lb that the wiper portion 43 occupies in the Y-axis direction as it moves includes the entire range Le that the power supply unit 80 occupies in the Y-axis direction. However, a configuration in which a part of the range Le is included in the range Lb may also be used. In other words, a configuration in which a part of the movement area of ​​the wiper portion 43 overlaps with a part of the power supply board 81 of the power supply unit 80 in the Y-axis direction may also be used. In this embodiment, a part of the movement area of ​​the wiper portion 43 and the entire power supply board 81 of the power supply unit 80 overlap in the Y-axis direction. A configuration in which a part of the movement area of ​​the wiper portion 43 and a part of the power supply board 81 of the power supply unit 80 overlap in the Y-axis direction may also be used.

[0067] The wiper unit 43 has a home position at the end in the +Y direction in its range of movement in the Y axis direction, i.e., the position where it connects with the connection unit 45. The wiper unit 43 stops at the home position when not wiping. The range of the line head 51 in the Y axis direction is the wiping area of ​​the ink ejection surface 51a by the wiper unit 43. The wiping area is indicated by the symbol S in FIG. 12. The wiper unit 43 moves to the home position where it connects with the connection unit 45 and the wiping area. The home position may be set to a position where the wiper unit 43 retreats from the wiping area and waits. When the wiper unit 43 is located at the home position, at least a part of the electrical component unit 60 overlaps with at least a part of the wiper unit 43. The range Lf is a range in which the wiper unit 43 located at the home position and the electrical component unit 60 overlap in the Y-axis direction. In this embodiment, the wiper unit 43 is configured so that the entirety of the wiper unit 43 overlaps with a part of the electrical component unit 60 in the Y-axis direction, but the wiper unit 43 may be configured so that the entirety of the electrical component unit 60 overlaps with a part of the electrical component unit 60 in the Y-axis direction. Alternatively, the wiper unit 43 may be configured so that the entirety of the electrical component unit 60 overlaps with a part of the wiper unit 43 in the Y-axis direction.

[0068] In this embodiment, when the wiper portion 43 is located at the home position, a part of the wiper portion 43 and a part of the power supply unit 80 overlap in the Y-axis direction. Note that when the wiper portion 43 is located at the home position, at least a part of the wiper portion 43 and at least a part of the power supply unit 80 may overlap in the Y-axis direction. In other words, the entire wiper portion 43 and a part or the entire power supply unit 80 may overlap in the Y-axis direction. Furthermore, when the wiper unit 43 is located at the home position, at least a part of the wiper unit 43 and at least a part of the control unit 70 may overlap in the Y-axis direction. That is, a part or all of the wiper unit 43 and a part or all of the control unit 70 may overlap in the Y-axis direction.

[0069] In this embodiment, the Y-axis direction, which is the movement direction of the wiper unit 43, is the device depth direction, and in this configuration, at least a part of the electrical component unit 60 and at least a part of the wiping mechanism 42 overlap in the Y-axis direction, thereby reducing the device dimension in the device depth direction. However, the main board 71A, the drive board 71B, and the power board 81 may be oriented along the YZ plane and arranged along the side surface of the device body 2 in the +X direction or along the side surface in the -X direction, and the movement direction of the wiper unit 43 may be set to the direction along the X-axis. In this case, the dimension in the X-axis direction, i.e., the width direction dimension of the device, can be reduced.

[0070] In this embodiment, the electrical equipment unit 60 is located on the rear side in the Y-axis direction, i.e., the device depth direction. The electrical equipment unit 60 being located on the rear side in the device depth direction means that the electrical equipment unit 60 is located in the +Y direction from the center position of the device body 2 in the device depth direction. The main board 71A, drive board 71B and power supply board 81 are arranged at a distance from each other along the Y-axis direction, with the power supply board 81 being provided in a power supply unit 80 which is a unit that constitutes the electrical equipment section 60, and the main board 71A and drive board 71B which are control boards are provided in a control unit 70 which is a unit that constitutes the electrical equipment section 60 and is located towards the rear of the device from the power supply unit 80. In this embodiment, the control unit 70 has an exterior configured by the control unit housing 72, but it is not necessary to include the control unit housing 72. In other words, the control unit may be configured by a main board 71A and a drive board 71B. In this embodiment, the control unit 70 is located closer to the rear side of the device than the power supply unit 80, but instead of this configuration, the power supply unit 80 may be located closer to the rear side of the device than the control unit 70. In this embodiment, the electrical equipment section 60 includes the control unit 70 and the power supply unit 80, but it may be configured to include only one of the control unit 70 and the power supply unit 80. Alternatively, the unit included in the electrical equipment section 60 may be a unit having a function different from the functions of the control unit 70 and the power supply unit 80.

[0071] In this embodiment, a rear cover 56 that forms the rear surface of the device is provided detachably, and the wiping mechanism 42 and the control unit 70 are exposed by removing the rear cover 56. With this configuration, the maintainability of the wiping mechanism 42 and the control unit 70, i.e., the electrical equipment section 60, is improved.

[0072] Furthermore, the power supply unit 80 is detachable, and the control unit 70 is provided so as to be openable and closable, and by opening the control unit 70 from a closed state, the power supply unit 80 is exposed and becomes detachable. This eliminates the need for storage space for the control unit 70 when attaching or detaching the power supply unit 80, improving the ease of attaching or detaching the power supply unit 80.

[0073] Moreover, the high voltage unit 90 includes a high voltage board 91. The high voltage board 91 is a board that handles higher voltages than the power supply board 81, the main board 71A, and the drive board 71B. The high voltage board 91 is provided outside the electrical equipment section 60, in the -X direction that intersects with the Y-axis direction relative to the electrical equipment section 60. With this configuration, the adverse effects of noise generated from the high voltage board 91 on the electrical equipment section 60 can be suppressed.

[0074] Further, the high-voltage substrate 91 is a substrate that controls the charging of the conveyor belt 13, and is located to the side of the conveyor belt 13, specifically in the +Y direction with respect to the conveyor belt 13. The positional relationship between the high-voltage substrate 91 and the conveyor belt 13 is such that a part of the high-voltage substrate 91 appears to overlap a part of the conveyor belt 13 when viewed from the rear of the device as shown in Fig. 13. Of course, a configuration in which the entire conveyor belt 13 appears to overlap the high-voltage substrate 91 may also be used. With this configuration, the distance between the high-voltage substrate 91 and the conveyor belt 13 can be shortened, and the wiring between the charging roller (not shown) that charges the conveyor belt 13 and the high-voltage substrate 91 can be shortened. Note that a part of wiping mechanism 42 and a part or all of high-voltage unit 90 may overlap in the Y-axis direction. Specifically, a part of connection unit 45 and a part of high-voltage unit 90 may overlap, and a part of wiper portion 43 and a part of high-voltage board 91 may overlap.

[0075] Further, a head driving board 52 (see FIGS. 1 and 2), which is a driving board for driving the line head 51, is provided outside the electrical component section 60 and above the line head 51. This makes it possible to suppress adverse effects of noise generated from the electrical component section 60 on the head driving board 52.

[0076] The main board 71A and the drive board 71B can also be arranged as shown in Fig. 15. Fig. 15 shows another embodiment, in which reference numeral 71C indicates the main board and reference numeral 71D indicates the drive board. In this embodiment, as in the above-described embodiment, at least a portion of the electrical component section 60 and at least a portion of the wiping mechanism 42 overlap in the Y-axis direction. In this embodiment, main substrate 71C and drive substrate 71D are arranged along the X-axis direction. A cutout portion 71e is formed in drive substrate 71D, and wiping mechanism 42 is arranged in cutout portion 71e when viewed from the rear of the device. In other words, cutout portion 71e that avoids wiping mechanism 42 is formed in drive substrate 71D. This results in a configuration in which drive substrate 71D is arranged by effectively utilizing the space around wiping mechanism 42, and the device can be made more compact.

[0077] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the invention described in the claims, and it goes without saying that these modifications are also included in the scope of the present invention. [Explanation of symbols]

[0078] Reference Signs List 1...inkjet printer, 2...device body, 2a...recess, 3...first media cassette, 4...second media cassette, 5...third media cassette, 6...additional unit, 7...operation panel, 8...output tray, 8a...projection, 8b...support surface, 9...scanner unit, 10A, 10B, 10C, 10D...ink storage section, 11A, 11B, 11C, 11D...mounting section, 12...waste liquid storage section, 13...transport belt, 14, 15...pulley, 19...supply port roller, 20... separation roller, 21, 22, 23... pick roller, 25, 26, 27... feed roller pair, 28, 29, 31, 32, 33, 34, 35, 36, 37, 38... transport roller pair, 41... flap, 42... wiping mechanism, 43... wiper portion, 44... wiper, 45... connection unit, 46... motor, 47... screw, 50... head unit, 51... line head, 51a... ink ejection surface, 52... head drive board, 5 5...housing, 56...rear cover, 56a...recess, 56b...exhaust port, 57...connection cover, 58a, 58b...connector connection, 59a, 59b...recess, 60...electrical component, 61...inlet, 65...image processing board, 66...flexible flat cable, 70...control unit, 71A...main board, 71B...drive board, 71C...main board, 71D...drive board, 71e...notch, 72...control unit housing, 73...connector, 74...screw, 78...hinge portion, 79...exhaust duct, 80...power supply unit, 80a...recess, 81...power supply board, 82A...first housing, 82B...second housing, 82a...opening, 82b...notch portion, 83...recess cover, 84...exhaust fan, 85...heat sink, 86...electronic component, 87...electronic component, 90...high voltage unit, 91...high voltage board, 92...high voltage unit housing, T1...transport path during recording, T2...switchback path, T3...reversal path

Claims

1. a liquid ejection head that ejects liquid onto a medium; a wiping mechanism for wiping a liquid ejection surface of the liquid ejection head, the wiping mechanism having a wiper portion that wipes the liquid ejection surface by moving in a direction along the liquid ejection surface; an electrical component section which is a section related to control of the device and includes at least one circuit board; a moving direction of the wiper portion is a direction intersecting a surface of the circuit board, At least a portion of the electrical component overlaps with a portion of the wiping mechanism in a moving direction of the wiper unit, The moving direction of the wiper portion is the depth direction of the device, The electrical component is located on the rear side in the depth direction of the device, The circuit board is provided in a plurality of locations spaced apart from one another along the moving direction of the wiper portion, The plurality of circuit boards include a power supply board and a control board, The power supply board is provided in a power supply unit which is a unit constituting the electrical equipment section, The control board is provided in a control unit that constitutes the electrical equipment section and is located on the rear side of the device relative to the power supply unit. A liquid ejection device comprising:

2. 2. The liquid ejection device according to claim 1, wherein a rear cover forming a rear surface of the device is detachably provided, Removing the rear cover exposes the wiping mechanism and the control unit. A liquid ejection device comprising:

3. 3. The liquid ejection device according to claim 2, wherein the power supply unit is detachable, The control unit is provided so as to be openable and closable, and by opening the control unit from a closed state, the power supply unit is exposed and the power supply unit can be attached and detached. A liquid ejection device comprising:

4. a liquid ejection head that ejects liquid onto a medium; a wiping mechanism for wiping a liquid ejection surface of the liquid ejection head, the wiping mechanism having a wiper portion that wipes the liquid ejection surface by moving in a direction along the liquid ejection surface; an electrical component section which is a section related to control of the device and includes at least one circuit board; a moving direction of the wiper portion is a direction intersecting a surface of the circuit board, At least a portion of the electrical component and a portion of the wiping mechanism overlap in a moving direction of the wiper unit, a high-voltage board that handles a higher voltage than the electrical equipment unit is provided outside the electrical equipment unit in a direction intersecting with the moving direction of the wiper unit relative to the electrical equipment unit, a surface of the high voltage board intersects with a moving direction of the wiper portion, Furthermore, when viewed from above, the high-voltage board is located at a position where the wiping mechanism is sandwiched between the high-voltage board and the electrical equipment unit in a direction intersecting with the moving direction of the wiper unit. A liquid ejection device comprising:

5. 5. The liquid ejection apparatus according to claim 4, further comprising a conveyor belt for conveying a medium, the conveyor belt being disposed at a position facing the liquid ejection head, the high-voltage substrate is a substrate for controlling the charging of the conveyor belt, The high voltage board is located to the side of the conveyor belt. A liquid ejection device comprising:

6. a liquid ejection head that ejects liquid onto a medium; a wiping mechanism for wiping a liquid ejection surface of the liquid ejection head, the wiping mechanism having a wiper portion that wipes the liquid ejection surface by moving in a direction along the liquid ejection surface; an electrical component section which is a section related to control of the device and includes at least one circuit board; a moving direction of the wiper portion is a direction intersecting a surface of the circuit board, At least a portion of the electrical component and a portion of the wiping mechanism overlap in a moving direction of the wiper unit, A cutout portion for avoiding the wiping mechanism is formed on the circuit board. A liquid ejection device comprising:

7. 7. The liquid ejection device according to claim 1, wherein a head drive board that drives the liquid ejection head is provided outside the electrical component section and above the liquid ejection head. A liquid ejection device comprising:

8. 8. The liquid ejection device according to claim 1, wherein the wiper section is movable between a home position and a wiping area where the wiper section wipes the liquid ejection surface, When the wiper unit is located at the home position, at least a portion of the electrical component unit and at least a portion of the wiper unit overlap with each other. A liquid ejection device comprising:

Images