Liquid injection device

Abstract

The present invention provides a liquid jet head and a liquid jet device that suppress enlargement and improve the discharge performance of bubbles. The liquid jet head comprises: a nozzle that jets ink; a filter chamber (50) that accommodates a filter; and a nozzle inlet (56) that allows the ink to flow out of the filter chamber (50). The filter chamber (50) has a first side (61) and a second side (62) extending toward the nozzle inlet (56) when viewed in a plane perpendicular to the filter. The nozzle inlet (56) is a long strip along the first side (61) when viewed in the plane.

Description

Technical Field

[0001] The present invention relates to a liquid ejecting head and a liquid ejecting device, and more particularly to an ink jet recording head and an ink jet recording device for ejecting ink as a liquid. Background Art

[0002] As a representative example of a liquid ejection head, an inkjet recording head that ejects ink as a liquid can be cited. The inkjet recording head has a filter chamber disposed in the middle of a flow channel, and foreign matter such as bubbles contained in the ink is captured by a filter disposed in the filter chamber. In order to facilitate the discharge of bubbles captured by the filter from the filter chamber, various liquid ejection heads have been proposed (for example, refer to Patent Document 1).

[0003] In the liquid jet head described in patent document 1, in order to improve the exhaust performance, the outflow port for supplying liquid to the nozzle is arranged above the gravity direction of the downstream chamber constituting the filter chamber, and is provided with a pair of straight line portions inclined toward the outflow port in a manner that the width of the downstream chamber gradually decreases toward the gravity direction. In addition, the outflow port is a perfect circle. In addition, the nozzle surface is parallel to the horizontal plane, and the filter is arranged vertically relative to the horizontal plane.

[0004] In addition, for example, in order to discharge bubbles contained in the ink, to suppress the viscosity increase of the ink, and to suppress the precipitation of components contained in the liquid, an inkjet recording head is proposed that is configured to circulate the ink between an ink supply unit (for example, refer to Patent Document 2).

[0005] In the liquid ejecting head described in Patent Document 2, a flow outlet for circulation is provided at the upstream and downstream of the filter chamber, and a flow outlet for supplying ink to the nozzle is provided in the downstream chamber. Although the nozzle surface is not inclined, the filter is inclined.

[0006] Regarding the liquid jet head described in Patent Document 1, when the downstream chamber is viewed in a plan view, the pair of straight portions are line symmetrical (with the same inclination angle), so the bubbles generated in the downstream chamber are discharged toward the outflow port along the pair of straight portions equally on the left and right. However, when the pair of straight portions toward the outflow port are not line symmetrical, that is, when the inclination angles are different, the movement speed of the bubbles flowing along the straight portion with a gentler inclination is slower than the movement speed of the bubbles flowing along the straight portion with a steeper inclination, so there is a possibility that the exhaust performance is deteriorated.

[0007] Such deterioration in exhaust performance similarly occurs in the liquid jet head described in Patent Document 2 when air bubbles are exhausted from the circulation outlets provided at the upstream and downstream of the filter chamber.

[0008] Such a problem exists not only in inkjet recording apparatuses but also in liquid ejecting apparatuses that eject liquids other than ink.

[0009] Patent Document 1: Japanese Patent Application Publication No. 2018-176715

[0010] Patent Document 2: Japanese Patent Application Publication No. 2012-056248 Summary of the invention

[0011] A preferred embodiment of the present invention for solving the above-mentioned problems involves a liquid injection head comprising: a nozzle that ejects liquid; a filter chamber that accommodates a filter; and an outlet for allowing the liquid to flow out of the filter chamber, wherein the filter chamber has a first side and a second side extending toward the outlet when observed in a plane along a direction perpendicular to the filter, and the outlet is a long strip along either the first side or the second side when observed in the plane.

[0012] One aspect of a liquid ejecting apparatus according to a preferred aspect of the present invention includes: the liquid ejecting head described above; and a holding portion that holds the liquid ejecting head such that the filter is inclined with respect to a horizontal plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a diagram showing a schematic configuration of an ink jet recording device according to Embodiment 1.

[0014] Figure 2 It is an exploded perspective view showing the recording head according to the first embodiment.

[0015] Figure 3 This is a plan view of the nozzle surface side of the recording head according to the first embodiment.

[0016] Figure 4 This is a plan view of the filter component when viewed in a direction perpendicular to the filter.

[0017] Figure 5 This is a plan view of the interior of the filter component when viewed in a direction perpendicular to the filter.

[0018] Figure 6 for Figure 4 A-A' line cross-sectional view.

[0019] Figure 7 It is a plan view of the downstream chamber when viewed in a direction perpendicular to the filter.

[0020] Figure 8 This is a plan view of the filter component when viewed in a direction perpendicular to the filter.

[0021] Fig. 9 for Figure 8 BB' line cross-sectional view.

[0022] Fig.10 This is a plan view of the upstream chamber when viewed in a direction perpendicular to the filter.

[0023] Fig.11 It is a plan view of the downstream chamber when viewed in a direction perpendicular to the filter. DETAILED DESCRIPTION

[0024] Implementation Method 1

[0025] The present invention will be described in detail below based on the embodiments. However, the following description is for the content of one embodiment of the present invention and can be arbitrarily changed within the scope of the present invention. The components marked with the same symbols in each figure represent the same components, and the description is appropriately omitted.

[0026] In each figure, X, Y, and Z represent three spatial axes that are orthogonal to each other. In this specification, the directions along the above axes are set as the X direction, the Y direction, and the Z direction. In addition, the axis formed by rotating the X axis by an angle θ with the Y axis as the center is set as the V axis, and the axis formed by rotating the Z axis by an angle θ is set as the W axis, and the directions along the above axes are set as the V direction and the W direction. The direction pointed by the arrow mark in each figure is set as the positive (+) direction and the opposite direction of the arrow mark is set as the negative (-) direction for explanation. The Z direction represents the vertical direction, the +Z direction represents the vertical bottom, and the -Z direction represents the vertical top.

[0027] Figure 1 1 is a diagram showing a schematic configuration of an ink jet recording apparatus 1 which is an example of a liquid ejecting apparatus according to Embodiment 1 of the present invention.

[0028] like Figure 1 As shown, the inkjet recording device 1 is a printing device that ejects and lands ink, which is a kind of liquid, on a medium S such as printing paper in the form of ink droplets, and prints an image or the like by arranging dots formed on the medium S.

[0029] The inkjet recording device 1 comprises: a line head 2, which is composed of an inkjet recording head 100 (hereinafter, also referred to as the recording head 100) for ejecting ink; a liquid supply unit 3; a conveying unit 4, which conveys a medium S in a conveying direction; a support seat 5; and a holding unit 6, and these line head 2, liquid container 12, conveying unit 4, support seat 5 and holding unit 6 are housed in a housing 7.

[0030] The line head 2 is composed of a plurality of recording heads 100 held by a holding portion 6, and is arranged in a housing 7. The holding portion 6 holds the line head 2 such that filters of the recording heads 100 described later are tilted relative to the XY plane, which is a horizontal plane.

[0031] Each recording head 100 of the line head 2 is maintained in such a manner that the ejection direction of the ink droplets becomes the +W direction which is tilted by rotating the +Z direction which is the vertical direction (also referred to as the gravity direction) around the Y axis. In other words, the ejection direction of the ink droplets ejected from the nozzle becomes the +W direction which is tilted toward the -X direction relative to the +Z direction. In addition, the tilt angle θ of the recording head 100 constituting the line head 2 relative to the +Z direction, that is, the tilt angle θ of the W direction which is the ejection direction of the ink droplets relative to the +Z direction, is set within the range of, for example, 0<θ≤180 degrees. In the case where θ exceeds 90 degrees, a component in the -Z direction is included in the ejection direction of the ink droplets.

[0032] In addition, although in this embodiment, the recording head 100 of the line head 2 is held in a state of being always tilted relative to the horizontal plane by the holding portion 6, it is not necessary to be held in a state of being always tilted. For example, by providing an adjustment mechanism for adjusting the tilt of the line head 2 relative to the horizontal plane, the recording head 100 may be held in a tilted state only during maintenance operations such as suction cleaning described later and printing by ejecting ink onto the medium S.

[0033] The medium S of this embodiment is a type of medium composed of, for example, recording paper such as continuous paper, cloth, resin film, etc., and is held in a state of being wound into a roll on the unwinding shaft 8. The medium S is conveyed by the conveying unit 4 to a support base 5 such as a platen disposed at a distance from a nozzle surface of the recording head 100 where nozzles are formed, and is printed on the support base 5 by the line head 2. The medium S printed on the support base 5 by the recording head 100 is wound on the winding shaft 9 by the conveying unit 4.

[0034] The loading surface of the support seat 5 on which the medium S is loaded is arranged to be tilted in accordance with the tilt angle of the nozzle surface of the recording head 100. That is, the tilt angle θ between the nozzle surface and the support seat 5 is set in such a way that the interval between each nozzle of the nozzle surface and the medium S becomes fixed during the printing operation. In other words, the loading surface of the support seat 5 is parallel to the VY plane defined by the V axis and the Y axis, and the angle with the XY plane becomes the tilt angle θ. The V direction is a direction orthogonal to the W direction, and is also a direction orthogonal to the Y direction. The medium S is transported in the +V direction or the -V direction on the loading surface of the support seat 5 through the transport unit 4. Hereinafter, the +V direction or the -V direction is also referred to as the transport direction.

[0035] The line head 2 composed of the recording head 100 has a Y direction orthogonal to the conveying direction of the medium S as its longitudinal direction, and has a plurality of nozzles arranged so that the printing range in the Y direction is larger than the printing range in the Y direction of the medium S. That is, the line head 2 of this embodiment is fixed so as not to move along the Y axis relative to the housing 7 during the printing operation.

[0036] In addition, the medium S is not limited to a medium such as continuous paper, and various ejected media on which the ink droplets ejected from the nozzles of the recording head 100 can be ejected can be used. For example, the present invention can also be applied to the use of ejecting ink droplets to an ejected medium having a three-dimensional shape. In addition, the support seat 5 is not limited to a platen having a flat mounting surface for mounting the medium S, and can also be a so-called platen such as a roller having a curved mounting surface for mounting the medium S. In addition, it can also be set to support the back side of the medium S by a conveyor belt such as an endless belt.

[0037] The conveying unit 4 includes a paper supply roller 10 and a conveying roller 11. The paper supply roller 10 is composed of a pair of upper and lower rollers that can rotate synchronously in opposite directions while clamping the medium S. The paper supply roller 10 is driven by the power of a motor not shown in the figure, and supplies the medium S from the unwinding shaft 8 side to the support seat 5 side. The conveying roller 11 is arranged on the opposite side of the paper supply roller 10 with the support seat 5 sandwiched therebetween, and guides the printed medium S to the winding shaft 9 side. In addition, the medium S does not necessarily have to be wound on the winding shaft 9. In addition, although the conveying unit 4 is illustrated as a component including the paper supply roller 10 and the conveying roller 11 in the present embodiment, it is not particularly limited thereto, and may also be a component that conveys the medium S by a belt or a roller.

[0038] The liquid supply unit 3 includes a liquid container 12 containing ink and a supply flow path 13 for supplying the ink from the liquid container 12 to the recording head 100 .

[0039] The liquid container 12 is a component for storing the ink to be ejected from the recording head 100. The liquid container 12 independently stores multiple types of inks of different colors and types. In the present embodiment, four liquid containers 12 are provided in the housing 7. As such liquid containers 12, there can be listed a detachable box, a bag-shaped ink bag formed by a flexible film, an ink tank capable of replenishing ink, etc. In addition, the number of liquid containers 12 is not particularly limited, and can be one, or can be more than two.

[0040] The supply channel 13 is a component for supplying ink from the liquid container 12 to the recording head 100, and a pressure delivery unit 15 for pressure-delivering the ink from the liquid container 12 toward the recording head 100 is provided in the middle of the supply channel 13. As the pressure delivery unit 15, for example, a pressing unit for pressing the liquid container 12 from the outside, a pressure pump, etc. can be cited. In the present embodiment, a pressure pump is provided as the pressure delivery unit 15. In addition, as the pressure delivery unit 15, for example, it can also be set to adjust the relative position of the recording head 100 and the liquid container 12 in the vertical direction to use the generated water level pressure difference.

[0041] Here, further reference Figure 2 as well as Figure 3 , the recording head 100 of this embodiment is described in detail. Figure 2 1 is an exploded perspective view showing a recording head according to Embodiment 1 of the present invention. Figure 3 This is a plan view of the nozzle surface side of the recording head. Figure 2 as well as Figure 3 , the recording head is shown in a state where it is arranged so that the ejection direction of ink becomes the +Z direction.

[0042] The line head 2 includes a plurality of recording heads 100 and a holding unit 6 that holds the plurality of recording heads 100 .

[0043] The recording head 100 is fixed to the +Z direction side of the holding portion 6, that is, the surface side facing the medium S. In addition, a plurality of recording heads 100 are arranged on the holding portion 6 along the Y direction orthogonal to the X direction. In addition, although in the present embodiment, four recording heads 100 are fixed to the holding portion 6, the number of the recording heads 100 may be more than two, or the line head 2 may be constituted by one recording head 100.

[0044] Furthermore, the holding portion 6 is provided with a connection portion 201 connected to the supply flow path 13 on the surface on the −Z direction side. In the present embodiment, four connection portions 201 are provided, and one supply flow path 13 is connected to each connection portion 201.

[0045] A flow path (not shown) communicating with the connection portion 201 is provided inside the holding portion 6. The flow path in the holding portion 6 is formed so as to distribute ink to a plurality of recording heads 100, four recording heads 100 in this embodiment.

[0046] The recording head 100 of this embodiment includes: a plurality of head chips 30; a holder 23 having a flow path for ink supplied to the plurality of head chips 30; a filter component 20 having a flow path for ink supplied to the holder 23; and a cover 40 disposed on the nozzle surface 30a side of the head chip 30.

[0047] The head chip 30 has a nozzle surface 30a provided with a nozzle 31 on the +Z direction side. In addition, the -Z direction sides of the plurality of head chips 30 are bonded to the surface on the +Z direction side of the holder 23. A distribution flow channel is provided inside the holder 23, and the distribution flow channel distributes and supplies the ink supplied from the filter member 20 to the plurality of head chips 30. A flow channel connected to the nozzle 31 and a pressure generating unit that causes a pressure change in the ink in the flow channel are provided inside the head chip 30 (not shown). As the pressure generating unit, for example, a unit that causes a volume change in the liquid flow channel by deformation of a piezoelectric actuator having a piezoelectric material having an electromechanical conversion function, thereby causing a pressure change in the ink in the liquid flow channel to eject ink droplets from the nozzle 31, a unit that arranges a heating element in the flow channel and ejects ink droplets from the nozzle 31 by using bubbles generated by the heat of the heating element, and a so-called electrostatic actuator that generates an electrostatic force between a vibration plate and an electrode and deforms the vibration plate by the electrostatic force to eject ink droplets from the nozzle 31 can be used.

[0048] The filter member 20 includes a filter chamber 50 that forms a part of the flow path of ink supplied to the head chip 30 via the holder 23, and a filter 57 that is disposed in the filter chamber 50. The detailed structure of the filter member 20 will be described below.

[0049] The holder 23 has a fixing portion 25 forming a groove-shaped space on the +Z direction side. The fixing portion 25 is continuously provided on the surface on the +Z direction side of the holder 23 across the Y direction, and is thus provided with openings on both side surfaces in the Y direction. In the fixing portion 25 of the holder 23, a plurality of head chips 30 are arranged in the Y direction and fixed by adhesives or the like. In the present embodiment, six head chips 30 are bonded to one holder 23. Of course, the number of head chips 30 fixed to one filter component 20 is not particularly limited, and the number of head chips 30 may be one or more than two for one filter component 20.

[0050] The plurality of head chips 30 of the present embodiment are fixed in the in-plane direction of the nozzle surface 30a in such a manner that the nozzle array is tilted relative to the X direction. That is, the arrangement direction of the nozzles 31 constituting the nozzle array, i.e., the Xa direction, becomes a tilted direction relative to the X direction. In other words, the plurality of nozzles 31 are arranged along the Xa direction on a plane defined by the Xa direction and the Y direction intersecting the Xa direction.

[0051] The cover 40 is a member formed by bending a plate-like member such as metal, and is provided with an exposure opening 41, which is a through hole for exposing the nozzles 31 of each head chip 30. In the present embodiment, the exposure opening 41 is provided in a manner of opening independently for each head chip 30e. That is, since the recording head 100 of the present embodiment has six head chips 30, six independent exposure openings 41 are provided on the cover 40.

[0052] The cover 40 is bonded to the holder 23 with an adhesive. When the cover 40 is bonded to the holder 23, the nozzle surface 30a and the nozzles 31 of each head chip 30 are exposed from the exposure opening 41 in plan view from the nozzle surface 30a side.

[0053] In addition, although the recording head 100 of the present embodiment has a substantially parallelogram shape in a plan view viewed from the nozzle surface 30 a side, the shape is not limited to a substantially parallelogram and may be a rectangular shape, a trapezoidal shape, a polygonal shape, or the like.

[0054] use Figures 4 to 7 Next, the filter member 20 of the recording head 100 according to the present embodiment will be described. Figure 4 is a plan view of the filter component when viewed in the +Z direction, which is perpendicular to the filter. Figure 5 is a plan view of the interior of the filter component when viewed in the +Z direction, which is a direction perpendicular to the filter. Figure 6 for Figure 4 A-A' line cross-sectional view, Figure 7 It is a plan view of the downstream chamber when viewed in the +W direction which is a direction perpendicular to the filter.

[0055] and Figure 2 as well as Figure 3 Likewise, Figure 4 as well as Figure 5 FIG. 2 shows the filter member 20 of the recording head 100 arranged so that the ejection direction of ink becomes the +Z direction. Figure 1 Likewise, Figure 6 The filter member 20 of the recording head 100 is shown in a state where it is arranged so that the ejection direction of ink becomes the +W direction. Figure 7 This is a diagram of observing the downstream chamber 50B of the recording head 100 in a state where the downstream chamber 50B is arranged so that the ejection direction of ink is in the +W direction, along the +W direction.

[0056] The filter member 20 is a member formed by laminating a first filter member 21 and a second filter member 22, and has a filter chamber 50 for accommodating a filter 57 disposed therein. Specifically, the filter member 20 includes a filter chamber 50 disposed on the side of the holding portion 6 (at the Figure 4 as well as Figure 5 The first filter member 21 (-Z direction side shown in FIG. 1 ) and the holder 23 side (in the -Z direction side shown in FIG. 1 ) provided on the first filter member 21 Figure 4 as well as Figure 5 The first filter member 21 and the second filter member 22 are laminated. Although the first filter member 21 and the second filter member 22 can be formed of, for example, a resin material, the material is not particularly limited to the resin material.

[0057] On the first filter member 21, on the second filter member 22 side (at Figure 4 as well as Figure 5 A first recess 51 is formed on the surface of the first filter member 21 (on the +Z direction side shown in FIG. 1 ). Figure 4 as well as Figure 5 A supply portion 55 is formed on the -Z direction side shown in FIG. 2 and protrudes from the surface of the first filter member 21. The supply portion 55 is formed Figure 4 as well as Figure 5 The supply portion 55 is connected to an outlet of a flow path (not shown) provided in the holding portion 6. The inlet 54 is a flow path for introducing ink supplied from the flow path into the filter chamber 50.

[0058] On the second filter member 22, on the first filter member 21 side (at Figure 4 as well as Figure 5 A second recess 52 is formed on the surface of the second filter member 22 (-Z direction side). Figure 4 as well as Figure 5A nozzle inlet 56 is formed on the +Z direction side shown in the figure, and the nozzle inlet 56 is an opening for supplying ink from the filter chamber 50 to the nozzle 31 of the head chip 30 via the holder 23. In the present embodiment, the nozzle inlet 56 is formed as a through hole provided on the bottom surface of the second recess 52. In addition, the nozzle inlet 56 is an example of an "outlet" for allowing the ink to flow out of the filter chamber 50. A flow channel (not shown) communicating with the nozzle inlet 56 is formed in the second filter member 22, and the ink discharged from the nozzle inlet 56 is supplied to the holder 23 from the opening for introducing the unillustrated ink provided on the holder 23 via the flow channel. The ink supplied to the holder 23 is branched into an amount equal to the number of head chips 30 (six in the present embodiment) in the flow channel (not shown) formed inside the holder 23, and is supplied to each head chip 30.

[0059] By laminating the first filter member 21 and the second filter member 22, a filter chamber 50 composed of the first recess 51 and the second recess 52 is formed. A filter 57 is provided in the filter chamber 50 so as to cover the opening of the second recess 52. Hereinafter, a space on the upstream side of the filter 57 in the filter chamber 50 is referred to as an upstream chamber 50A, and a space on the downstream side of the filter 57 is referred to as a downstream chamber 50B. The upstream side of the filter 57 refers to a side relatively far from the nozzle 31 for ejecting ink in the recording head 100, and the downstream side refers to a side relatively close to the nozzle 31.

[0060] The filter 57 is a member for capturing foreign matter, bubbles, etc. contained in the ink, and in the present embodiment is fixed to the second filter member 22 by heat melting, adhesive, etc. In addition, the filter 57 can be, for example, a member formed by weaving a linear metal twill, a member formed by providing a plurality of holes in a flat plate-shaped member made of SUS, a nonwoven fabric, etc.

[0061] In this embodiment, four first recesses 51 are formed in the first filter member 21, and four second recesses 52 are formed in the second filter member 22. The filter member 20 is provided with four filter chambers 50 constituted by the first recesses 51 and the second recesses 52. Each filter chamber 50 is provided with a supply portion 55 and a nozzle introduction port 56.

[0062] The filter member 20 constructed in this manner supplies ink from the four liquid containers 12 to the filter chamber 50 via the supply flow path 13, the flow path in the holder 6, and the supply portion 55. In the filter chamber 50, the ink supplied to the first recess 51 side passes through the filter 57 and flows into the second recess 52 side, and foreign matter and bubbles are captured by the filter 57. Then, the ink that has passed through the filter 57 is discharged from the filter chamber 50 to the nozzle introduction port 56. In addition, the ink discharged from the nozzle introduction port 56 is supplied to each head chip 30 via the holder 23 as described above, and is ejected from the nozzle 31.

[0063] The nozzle surface 30 a on which the nozzle 31 is formed is arranged in parallel with the filter 57 .

[0064] like Figure 1 as well as Figure 6 As shown, the recording head 100 ejects ink in a state in which it is tilted by the holding portion 6. In the state in which the recording head 100 is tilted as described above, the nozzle inlet 56 is arranged on the side opposite to the +Z direction, which is the gravity direction, compared to the inlet 54. That is, the nozzle inlet 56 is arranged above the inlet 54 in the Z direction. In addition, Figure 1 as well as Figure 2 The length direction of the line head 2 shown in the figure, i.e., the Y direction, becomes Figure 7 The V direction of the conveying medium S is parallel to the intersection line M shown in FIG.

[0065] Here, using Figure 7 , the structure of the filter chamber 50 is described in detail.

[0066] The filter chamber 50 has a first side 61 and a second side 62 extending toward the nozzle inlet 56 as the "outlet" when viewed in a plane along the +W direction perpendicular to the filter 57. The filter chamber 50 also has a third side 63 parallel to the first side 61 and a fourth side 64 parallel to the second side 62 when viewed in the plane. The shape of the filter chamber 50 when viewed in the plane is a substantially rhombus having the first side 61, the second side 62, the third side 63, and the fourth side 64.

[0067] The portions where the first side 61, the second side 62, the third side 63 and the fourth side 64 intersect with each other are referred to as intersections. Each intersection may be a portion where straight lines intersect each other, or may be an R-shape (chamfered shape). The R-shape refers to an arc shape, or a polygonal shape that is approximately circular. When a nozzle inlet 56 is provided on the filter chamber 50, the intersection of the first side 61 and the second side 62 is preferably arranged at the top of the filter chamber 50. Figure 7In this case, the intersection portion of the first side 61 and the second side 62 becomes the intersection portion that is arranged at the uppermost position in the gravity direction among the four intersection portions.

[0068] The first side 61 and the second side 62 extend toward the nozzle introduction port 56, which means that the nozzle introduction port 56 is arranged near the intersection of the first side 61 and the second side 62. The nozzle introduction port 56 is arranged near the intersection, which means that the minimum distance D between the intersection and the edge of the nozzle introduction port 56 is smaller than the maximum dimension of the nozzle introduction port 56, that is, the length L1 of the long side of the nozzle introduction port 56. In the present embodiment, the minimum distance D between the intersection and the edge of the nozzle introduction port 56 is smaller than the minimum dimension of the nozzle introduction port 56, that is, the length L2 of the short side of the nozzle introduction port 56.

[0069] In addition, in the present embodiment, the upstream chamber 50A and the downstream chamber 50B constituting the filter chamber 50 are set to be substantially the same shape. That is, the upstream chamber 50A and the downstream chamber 50B both have the first side 61 to the fourth side 64. Specifically, the first side 61 to the fourth side 64 provided at the upstream chamber 50A are respectively the inner edge of the side wall protruding from the bottom surface of the first recessed portion 51 where the inlet 54 is formed toward the second filter member 22 when viewed in the plane, or the outer edge of the bottom surface of the first recessed portion 51 where the inlet 54 is formed. Similarly, the first side 61 to the fourth side 64 provided at the downstream chamber 50B are respectively the inner edge of the side wall protruding from the bottom surface of the second recessed portion 52 where the nozzle inlet 56 is formed toward the first filter member 21 when viewed in the plane, or the outer edge of the bottom surface of the second recessed portion 52 where the nozzle inlet 56 is formed. However, the upstream chamber 50A and the downstream chamber 50B do not necessarily have the same shape. For example, the downstream chamber 50B having the nozzle introduction port 56 serving as the “outflow port” of the ink may have the first to fourth sides 61 to 64 as described above, while the upstream chamber 50A may have an arbitrary shape.

[0070] In the plane observation, the first side 61 forms a first angle α with respect to the imaginary straight line N, which is orthogonal to the intersection line M of the filter 57 and the horizontal plane, and extends in the direction along the filter 57, that is, the V direction. The horizontal plane refers to a plane orthogonal to the +Z direction of the vertical direction, and is an XY plane formed by the X-axis and the Y-axis. The direction along the filter 57 refers to a direction parallel to the VY plane formed by the V-axis and the Y-axis. In addition, the second side 62 forms a second angle β less than the first angle α with respect to the imaginary straight line N when observed in the plane. In addition, the first angle α and the second angle β are respectively greater than 0 degrees and less than 90 degrees.

[0071] The first angle α formed between the first side 61 and the virtual straight line N is the smaller angle of the angles formed between the first side 61 and the virtual straight line N. Figure 7 In the example shown, the angles formed by the line extending the first side 61 and the virtual straight line N are α and γ, and the smaller one of them is the first angle. The second angle β is similarly the smaller one of the angles formed by the second side 62 and the virtual straight line N.

[0072] The nozzle inlet 56 is long along the first side 61 when viewed from the plane. In other words, one side along the first side 61 of the sides constituting the nozzle inlet 56 is longer than one side along the second side 62. In the present embodiment, the nozzle inlet 56 is in the shape of a strip in which the length L1 in the direction along the first side 61 is longer than the length L2 in the direction along the second side 62 when viewed from the plane.

[0073] In addition, although the nozzle inlet 56 of this embodiment is Figure 7 The nozzle inlet 56 is a substantially parallelogram when viewed from the plane, but is not limited to such a shape. For example, the shape of the nozzle inlet 56 may also be a substantially ellipse, a substantially rhombus, a substantially rectangular, a substantially polygon, etc. In the case where the nozzle inlet 56 is a substantially ellipse, a substantially polygon, etc., the nozzle inlet 56 is a strip along the first side 61 when viewed from the plane, which means the following shape. That is, the maximum value of the opening width of the nozzle inlet 56 in the direction along the first side 61 of the nozzle inlet 56 is longer than the maximum value of the opening width in the direction along the second side 62.

[0074] Such a filter chamber 50 is filled with ink from the liquid container 12, and foreign matter and bubbles are captured by the filter 57, and the ink that has passed through the filter 57 is discharged from the nozzle inlet 56 to the head chip 30 via the holder 23. In order to discharge the bubbles captured by the filter 57 from the filter chamber 50, suction cleaning is performed. Suction cleaning refers to the operation of sealing the nozzle surface 30a of the recording head 100 in a closed space by using a capping device, etc., and sucking the closed space by a suction device such as a suction pump, so that the bubbles are forcibly discharged from the nozzle 31 together with the ink. By performing suction cleaning, the bubbles 70 captured in the upstream chamber 50A pass through the filter 57 and flow into the downstream chamber 50B.

[0075] In addition to such suction cleaning, there is a case where the bubbles 70 flow into the downstream chamber 50B. For example, when performing a printing operation in which ink is ejected from the nozzle 31 to the medium S to form an image, there is a case where the bubbles gather and grow larger when they are captured in the filter chamber 50. When the bubbles grow larger in the upstream chamber 50A, there is a case where the bubbles come into contact with the filter 57, and a part of the bubbles passes through the filter 57 and flows into the downstream chamber 50B. The bubbles that flow into the downstream chamber 50B through the suction cleaning and printing operation are discharged from the filter chamber 50 as described below.

[0076] As described above, the second angle β is smaller than the first angle α. In other words, the first side 61 is gently inclined relative to the horizontal plane, that is, the WY plane, and the second side 62 is steeply inclined relative to the WY plane. Therefore, in the downstream chamber 50B, due to buoyancy and the flow of ink, the bubble 70 along the first side 61 moves toward the nozzle introduction port 56 relatively slowly, while the bubble 70 along the second side 62 moves toward the nozzle introduction port 56 relatively quickly.

[0077] On the other hand, the nozzle introduction port 56 is elongated along the first side 61 . Therefore, the distance that the bubbles 70 along the first side 61 need to travel to reach the nozzle introduction port 56 is shorter than the distance that the bubbles 70 along the second side 62 need to travel to reach the nozzle introduction port 56 .

[0078] Therefore, although the speed of the bubbles 70 along the first side 61 toward the nozzle inlet 56 is slow, the distance to the nozzle inlet 56 is short, so the bubbles 70 quickly flow into the nozzle inlet 56. Although the distance to the nozzle inlet 56 along the second side 62 is long, the speed of the bubbles 70 toward the nozzle inlet 56 is fast, so the bubbles quickly flow into the nozzle inlet 56. In this way, even if the first angle α and the second angle β of the first side 61 and the second side 62 with respect to the imaginary straight line N are different, since the nozzle inlet 56 is long along the first side 61, the discharge performance of the bubbles 70 from the filter chamber 50 to the nozzle inlet 56 can be improved.

[0079] Here, when the downstream chamber of the filter chamber is line-symmetrical as in the prior art when the filter is viewed from the plane, if a plurality of filter chambers are arranged in a row, more space for arranging these filter chambers must be ensured according to the shape and structure of the recording head, which will lead to an increase in the size of the recording head. In order to avoid such an increase in size, the area of ​​the filter 57 must be reduced, but the performance of the recording head 100 will be limited.

[0080] However, by making the first angle α and the second angle β formed by the first side 61 and the second side 62 with respect to the imaginary straight line N different from each other as in the downstream chamber 50B of the present embodiment, that is, by making the shape asymmetric with respect to the imaginary straight line N, the space for arranging the plurality of filter chambers 50 can be reduced, thereby suppressing the enlargement of the recording head 100 and increasing the area of ​​the filter 57. In this way, by providing the asymmetric filter chamber 50, the enlargement of the recording head 100 can be suppressed, the area of ​​the filter 57 can be increased, and the air bubble discharge performance can be improved.

[0081] As described above, the recording head 100 according to the present embodiment is characterized in that it includes: a nozzle 31 for ejecting ink; a filter chamber 50 for housing a filter 57; a nozzle inlet 56 for allowing the ink to flow out of the filter chamber 50; and a nozzle inlet 56 for allowing the ink to flow out of the filter chamber 50. Figure 4 As shown in FIG. 1 , when viewed in a plane along the +Z direction perpendicular to the filter 57, the filter 57 has a first side 61 and a second side 62 (both refer to FIG. 1 ) extending toward the nozzle inlet 56. Figure 7 ), the nozzle inlet 56 is a long strip along the first edge 61 when viewed from the plane.

[0082] When making such a recording head 100 Figure 1 as well as Figure 6 As shown in FIG. 1 , the ink is ejected in the +W direction which is inclined relative to the +Z direction which is the vertical direction. Figure 7 As shown, even if the first angle α and the second angle β of the first side 61 and the second side 62 relative to the virtual straight line N are different, since the nozzle inlet 56 is elongated along the first side 61, the discharge performance of the bubbles 70 from the filter chamber 50 to the nozzle inlet 56 can be improved.

[0083] In the recording head 100 of the present embodiment, it is preferable that the nozzle introduction port 56 is an opening for supplying ink from the filter chamber 50 to the nozzle 31 . This makes it possible to easily discharge air bubbles from the filter chamber 50 toward the nozzle 31 .

[0084] The inkjet recording device 1 of the present embodiment is characterized in that it includes a recording head 100 and a holding portion 6 that holds the recording head 100 so that the filter 57 is tilted relative to the XY plane that is a horizontal plane. Figure 1 as well as Figure 6 As shown, in the filter chamber 50 of the recording head 100 which is held tilted so as to eject ink in the +W direction tilted with respect to the +Z direction which is the vertical direction, the discharge performance of the air bubbles 70 is improved.

[0085] In the inkjet recording device 1 of the present embodiment, it is preferable that the recording head 100 includes a nozzle face 30a on which the nozzles 31 are formed, and the nozzle face 30a is parallel to the filter 57. Thus, even when the recording head 100 is tilted and used so as to eject ink in the +W direction, it is possible to improve the discharge performance of the bubbles in the filter chamber 50. In addition, the nozzle face 30a may not be parallel to the filter 57.

[0086] In the recording head 100 of this embodiment, it is preferable to include an inlet 54 for allowing ink to flow into the filter chamber 50 , and the nozzle introduction port 56 is arranged in the −Z direction opposite to the gravity direction, ie, the +Z direction, relative to the inlet 54 .

[0087] In addition, in the inkjet recording device 1 of the present embodiment, preferably, the first edge 61 forms a first angle α relative to the imaginary straight line N when observed in the plane, wherein the imaginary straight line N is orthogonal to the intersection M of the filter 57 and the horizontal plane, i.e., the XY plane, and extends in the V direction along the filter 57, and the second edge 62 forms a second angle β smaller than the first angle α relative to the imaginary straight line N when observed in the plane, and the nozzle inlet 56 is a long strip along the first edge 61.

[0088] Even when the inclination angles of the first side 61 and the second side 62 relative to the imaginary straight line N, i.e., the first angle α and the second angle β, are different, since the nozzle inlet 56 is a long strip along the first side 61, bubbles moving along the first side 61 can be efficiently discharged from the nozzle inlet 56.

[0089] Furthermore, in the ink jet recording apparatus 1 of the present embodiment, it is preferable that the first angle α and the second angle β are each larger than 0 degrees and smaller than 90 degrees.

[0090] Furthermore, in the inkjet recording device 1 of the present embodiment, the shape of the filter chamber 50 when viewed in the plane is preferably a substantially quadrilateral having a first side 61, a second side 62, a third side 63 parallel to the first side 61, and a fourth side 64 parallel to the second side 62. Thus, even when a plurality of filter chambers 50 are provided, the size of the filter member 20 can be reduced while suppressing an increase in the size of the filter 57, compared to the case where filters having a shape that is line-symmetrical with respect to the imaginary straight line N are provided.

[0091] In the inkjet recording device 1 of the present embodiment, it is preferable that the shape of the downstream chamber 50B of the filter chamber 50 on the downstream side of the filter 57 when viewed in the plane is substantially parallelogram or substantially rhombus. Accordingly, even when a plurality of filter chambers 50 are provided, the size of the filter member 20 can be reduced while suppressing the enlargement of the filter 57, compared with the case where filters having a shape that is line-symmetrical with respect to the imaginary straight line N are provided.

[0092] In addition, in the inkjet recording apparatus 1 of the present embodiment, it is preferable to include a line head 2 composed of the recording heads 100, and the longitudinal direction of the line head 2 is the Y direction parallel to the intersection line M. Although the line head 2 is longitudinally (in Figure 1 Although the recording head 100 is tilted with the axis of rotation being the Y direction (in the example of FIG. 1 ), even when such a line head 2 is used, the air bubble discharge performance of the filter chamber 50 can be improved.

[0093] In addition, the inkjet recording apparatus 1 of the present embodiment preferably includes a conveying unit 4 that conveys the medium S in a conveying direction that is a +V direction or a -V direction that is orthogonal to the intersection line M. Thus, even if the conveying direction for conveying the medium S is inclined, the air bubble discharge performance of the filter chamber 50 can be improved.

[0094] Implementation Method 2

[0095] Figure 8 1 is a plan view of the filter component when viewed in the +Z direction, which is a direction perpendicular to the filter, according to Embodiment 2 of the present invention. Fig. 9 for Figure 8 The BB' line cross-sectional view, Fig.10 1 is a plan view of the upstream chamber when viewed in the direction opposite to the +W direction which is a direction perpendicular to the filter. In addition, the same reference numerals are given to the same components as those in Embodiment 1, and duplicate descriptions are omitted.

[0096] Figure 8 The filter member 20 of the recording head 100 is shown in a state where it is arranged so that the ejection direction of ink becomes the +Z direction. Fig. 9 The filter member 20 of the recording head 100 is shown in a state where it is arranged so that the ejection direction of ink becomes the +W direction. Fig.10 This is a diagram of the upstream chamber 50A of the recording head 100 arranged so that the ejection direction of ink is in the +W direction, when viewed in the direction opposite to the +W direction (−W direction).

[0097] Although the inkjet recording device of this embodiment is not particularly shown in the figure, it is an example of a so-called circulation type liquid ejecting device in which the ink supplied to the recording head 100 is returned from the recording head 100 to the liquid container 12. The holding portion 6 of this embodiment has a first flow channel (not shown) for supplying the ink of the liquid container 12 to the recording head 100, and a second flow channel (not shown) for circulating the ink returned from the recording head 100. Moreover, the holding portion 6 is connected to a discharge flow channel (not shown) connecting the second flow channel and the liquid container 12. That is, it is configured so that the ink is supplied from the liquid container 12 to the supply flow channel 13, the first flow channel, and the recording head 100, and the ink that is not ejected in the recording head 100 is returned to the recording head 100, the second flow channel, the discharge flow channel, and the liquid container 12.

[0098] The recording head 100 of this embodiment is located on the holding portion 6 side of the first filter member 21 ( Figure 8 A discharge portion 58 is formed on the -Z direction side of the first filter member 21 and protrudes from the surface of the first filter member 21. The discharge portion 58 is formed as a Figure 8 The discharge port 59 is a through hole penetrating in the Z direction shown. The discharge portion 58 is connected to the above-mentioned second flow path provided in the holding portion 6. The discharge port 59 serves as a flow path for returning ink to the second flow path of the holding portion 6.

[0099] In the filter member 20 thus configured, ink is supplied from the holder 6 to the upstream chamber 50A via the inlet 54. In the upstream chamber 50A, the ink that has not passed through the filter 57 is returned to the second flow path of the holder 6 via the outlet 59.

[0100] In this embodiment, the “outlet” for allowing the ink to flow out of the filter chamber 50 is the nozzle inlet 56 and the outlet 59. Fig.10 As shown, the discharge port 59 is a strip along the first side 61 when viewed from the plane. In other words, one side along the first side 61 of the sides constituting the discharge port 59 is longer than one side along the second side 62. In the present embodiment, the discharge port 59 is in the shape of a strip in which the length L1 along the direction of the first side 61 is longer than the length L2 along the direction of the second side 62 when viewed from the plane. In addition, when the recording head 100 is tilted, the discharge port 59 is arranged on the opposite side of the +Z direction, which is the direction of gravity, compared to the inlet 54. That is, the discharge port 59 is arranged above the inlet 54 in the Z direction.

[0101] In addition, although the discharge port 59 of this embodiment is Fig.10The shape of the discharge port 59 shown in the figure is a substantially parallelogram when viewed from above, but the shape is not limited to this. The shape of the discharge port 59 may be a substantially ellipse, a substantially rhombus, a substantially rectangular, a substantially polygonal, etc., similar to the shape of the nozzle introduction port 56 .

[0102] In the recording head 100 having such a structure, the second angle β formed by the first side 61 and the second side 62 in the upstream chamber 50A with respect to the imaginary straight line N is smaller than the first angle α. In other words, the first side 61 is gently inclined with respect to the horizontal plane, that is, the WY plane, and the second side 62 is steeply inclined with respect to the WY plane. Therefore, in the upstream chamber 50A, due to buoyancy and the flow of ink, the bubble 70 along the first side 61 moves toward the discharge port 59 relatively slowly, and the bubble 70 along the second side 62 moves toward the discharge port 59 relatively quickly.

[0103] On the other hand, the discharge port 59 is elongated along the first side 61 . Therefore, the distance that the air bubbles 70 along the first side 61 need to travel to reach the discharge port 59 is shorter than the distance that the air bubbles 70 along the second side 62 need to travel to reach the discharge port 59 .

[0104] Therefore, although the speed of the bubbles 70 along the first side 61 toward the discharge port 59 is slow, the distance to the discharge port 59 is short, so the bubbles 70 quickly flow into the discharge port 59. Although the distance to the discharge port 59 along the second side 62 is long, the speed of the bubbles 70 toward the discharge port 59 is fast, so the bubbles quickly flow into the discharge port 59. In this way, even if the first angle α and the second angle β of the first side 61 and the second side 62 with respect to the virtual straight line N are different, since the discharge port 59 is elongated along the first side 61, the discharge performance of the bubbles 70 to the discharge port 59 can be improved in the upstream chamber 50A of the filter chamber 50.

[0105] In the downstream chamber 50B, the nozzle inlet 56 is elongated along the first side 61 of the downstream chamber 50B as in the first embodiment, but the present invention is not limited to this. For example, the nozzle inlet 56 does not need to be elongated along the first side 61 .

[0106] Implementation 3

[0107] Fig.11 This is a plan view of a downstream chamber of the filter chamber when viewed in the +W direction which is a direction perpendicular to the filter according to Embodiment 3 of the present invention. Fig.11 The downstream chamber of the recording head 100 is shown in a state where the ink is disposed in a direction where the ejection direction of ink is in the +W direction. Components similar to those in the first embodiment are denoted by the same reference numerals, and duplicate descriptions are omitted.

[0108] As shown in the figure, the filter chamber 50 includes a nozzle introduction port 56A and a nozzle introduction port 56B as a plurality of outflow ports. In this way, a plurality of outflow ports may be provided in the filter chamber 50 .

[0109] The downstream chamber 50B has a substantially polygonal shape including a first side 61A and a second side 62A, and a first side 61B and a second side 62B when viewed in the plane.

[0110] The first side 61A forms a first angle α1 with respect to the imaginary straight line N when viewed from the plane. The second side 62A forms a second angle β1 with respect to the imaginary straight line N when viewed from the plane, which is smaller than the first angle α1. The first side 61B forms a first angle α2 with respect to the imaginary straight line N when viewed from the plane. The second side 62B forms a second angle β2 with respect to the imaginary straight line N when viewed from the plane, which is smaller than the first angle α2.

[0111] The nozzle inlet 56A is long along the first side 61A when viewed from the plane. In other words, one side along the first side 61A among the sides constituting the nozzle inlet 56A is longer than one side along the second side 62A. The nozzle inlet 56B is long along the first side 61B when viewed from the plane. In other words, one side along the first side 61B among the sides constituting the nozzle inlet 56B is longer than one side along the second side 62B.

[0112] The positions of the nozzle introduction port 56A and the nozzle introduction port 56B in the V direction are not particularly limited, and the positions in the V direction may be offset as shown in the figure.

[0113] In the recording head 100 of such a structure, although the speed of the bubbles (not shown) along the first side 61A toward the nozzle inlet 56A is slow, the distance to the nozzle inlet 56A is short, so the bubbles quickly flow into the nozzle inlet 56A. Although the distance of the bubbles along the second side 62A to the nozzle inlet 56A is long, the speed toward the nozzle inlet 56A is fast, so the bubbles quickly flow into the nozzle inlet 56A. In this way, even if the first angle α1 and the second angle β1 of the first side 61A and the second side 62A relative to the imaginary straight line N are different, since the nozzle inlet 56A is long along the first side 61A, the discharge property of the bubbles from the downstream chamber 50B of the filter chamber 50 to the nozzle inlet 56A can be improved. The same is true for the nozzle inlet 56B.

[0114] Other Implementation Methods

[0115] Although one embodiment of the present invention has been described above, the basic structure of the present invention is not limited to the above contents.

[0116] For example, although the nozzle introduction port 56 is elongated along the first side 61 in the plan view, the present invention is not limited thereto and the nozzle introduction port 56 may be elongated along the second side 62 .

[0117] In addition, although the nozzle introduction port 56 is cited as an example of the “outlet”, it is not limited to this, as long as it is used to make the ink flow out of the filter chamber. For example, the “outlet” may also be a port for making the ink discharged from the downstream chamber 50B of the filter chamber 50 be discharged to the outside of the recording head 100.

[0118] In the above-mentioned embodiment, a flow channel for supplying ink to the filter chamber 50 is formed in the holder 6, but the flow channel may not be formed inside the holder 6. In other words, a flow channel member for supplying ink to the filter chamber 50 may be provided instead of the holder 6, or a supply flow channel 13 and the inlet 54 of the filter member 20 may be directly connected.

[0119] The term "rhombus-shaped" in this specification means, for example, that the first side 61, the second side 62, the third side 63, and the fourth side 64 of the filter chamber 50 intersect each other. Figure 7 The case of an R shape as shown, and the case of a non-R shape as shown Figure 7 The filter chamber 50 is not an R-shaped as shown in the figure, but a case where the straight lines of the first side 61, the second side 62, the third side 63 and the fourth side 64 intersect each other. In addition, even if the filter chamber 50 is a substantially quadrilateral, a substantially parallelogram, a substantially rectangular, a substantially polygonal, etc., the intersection is also an R-shaped and a non-R-shaped. In addition, not only the shape of the filter chamber 50, but also the shape of the "outlet" such as the nozzle inlet 56 and the outlet 59 is the same.

[0120] Although in the above-mentioned embodiment, as the inkjet recording device 1, a so-called line recording device is illustrated in which the line head 2 having the recording head 100 is fixed on the holding portion 6 and printing is performed only by conveying the medium S, the present invention is not limited to this. The present invention can also be applied to a so-called serial recording device in which the recording head 100 is mounted on a carriage that moves in a direction intersecting the conveying direction of the medium S, and printing is performed while the recording head 100 is reciprocated in a direction intersecting the conveying direction. The carriage of such a serial recording device is the "holding portion" of the present invention. That is, the carriage holds the recording head 100 at an angle in such a manner that the direction of ejecting ink becomes an inclined direction relative to the +Z direction. Moreover, the direction of the reciprocating movement of the carriage is set to a direction parallel to the intersection line M. Even in such a serial recording device, as in the first embodiment, the discharge property of the bubbles in the filter chamber can be improved.

[0121] In addition, the present invention is an invention that widely targets all liquid ejection heads, and can be applied to, for example, various inkjet recording heads used in image recording devices such as printers, color material ejection heads used in the manufacture of color filters of liquid crystal displays, etc., electrode material ejection heads used in the formation of electrodes of organic EL displays, FEDs (field emission displays), etc., and bio-organic ejection heads used in the manufacture of biochips, etc. Of course, it is not limited to liquid ejection devices equipped with such liquid ejection heads.

[0122] Explanation of symbols

[0123] M…intersection line; N…imaginary straight line; S…medium; 1…inkjet recording device; 2…line head; 4…conveying section; 6…holding section; 20…filter component; 23…holding frame; 30…head chip; 30a…nozzle surface; 31…nozzle; 50…filter chamber; 50A…upstream chamber; 50B…downstream chamber; 54…inflow port; 56, 56A, 56B…nozzle inlet (outflow port); 57…filter; 59…discharge port (outflow port); 61, 61A, 61B…first side; 62, 62A, 62B…second side; 63…third side; 64…fourth side; 70…bubble; 100…inkjet recording head (liquid ejection head).

Claims

1. A liquid injection device, characterized in that: have: A liquid ejecting head including a nozzle for ejecting liquid, a filter chamber for housing a filter, and an outlet for allowing the liquid to flow out of the filter chamber; a holding portion that holds the liquid ejecting head in a manner such that the filter is inclined relative to a horizontal plane, The filter chamber has a first side and a second side extending toward the outflow port when viewed in a plane along a direction perpendicular to the filter. The first side forms a first angle with respect to an imaginary straight line when viewed from the plane, the imaginary straight line being orthogonal to an intersection line of the filter and the horizontal plane and extending in a direction along the filter, The second side forms a second angle smaller than the first angle with respect to the imaginary straight line when viewed from the plane, The outflow port is a long strip along the first side when viewed in the plane.

2. The liquid ejecting device according to claim 1, wherein: The outflow port is an opening for supplying liquid from the filter chamber to the nozzle.

3. The liquid ejecting device according to claim 1 or claim 2, wherein: An inlet is provided for allowing liquid to flow into the filter chamber, The outflow port is arranged in a direction opposite to the direction of gravity as compared to the inflow port.

4. The liquid ejecting device according to claim 1, wherein: The liquid ejecting head includes a nozzle surface on which the nozzle is formed. The nozzle face is parallel to the filter.

5. The liquid ejecting device according to claim 1, wherein: The first angle and the second angle are respectively greater than 0 degrees and less than 90 degrees.

6. The liquid ejecting device according to claim 1, wherein: The shape of the filter chamber in the planar view is a substantially quadrilateral having the first side, the second side, a third side parallel to the first side, and a fourth side parallel to the second side.

7. The liquid ejecting device according to claim 6, wherein: The shape of the downstream chamber of the filter chamber on the downstream side of the filter in the planar view is a substantially parallelogram or a substantially rhombus.

8. The liquid ejecting device according to claim 1, wherein: A line head is provided, the line head being composed of the liquid ejecting head, The length direction of the line head is parallel to the intersection line.

9. The liquid ejecting device according to claim 1, wherein: A conveying unit is provided, the conveying unit conveys the medium in a conveying direction, The conveying direction is a direction orthogonal to the intersection line.

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