Flow channel component, liquid ejection head, liquid ejection device, and method for manufacturing flow channel component

Abstract

The present invention provides a flow channel component, a liquid ejection head, a liquid ejection device, and a method for manufacturing a flow channel component that improves the reliability of the flow channel component. The flow channel component comprises: a supply flow channel for liquid to flow; a filter that is arranged in the middle of the supply flow channel and allows the liquid to pass through; a fixing component that constitutes a part of the supply flow channel and is fixed with the filter; a first component that constitutes a part of the supply flow channel and is fixed with the fixing component, the fixing component is made of a thermoplastic resin, and the first component is made of any one of a thermosetting resin, a metal, and a ceramic.

Description

Technical Field

[0001] The present invention relates to a flow channel component, a liquid ejecting head, a liquid ejecting device and a method for manufacturing the flow channel component. Background Art

[0002] A liquid ejection device having a liquid ejection head for ejecting liquid such as ink, such as a typical example of an inkjet printer, has been known. For example, a recording head described in Patent Document 1 as a liquid ejection head has a head body for ejecting ink droplets from a nozzle, and a flow channel unit for supplying ink to the head body. Here, the flow channel unit has an upstream flow channel component, which is provided with an upstream flow channel including a filter chamber in which a filter is arranged. In addition, the upstream flow channel component is made of a thermoplastic resin, and the filter is fixed to the upstream flow channel component by welding.

[0003] Patent Document 2 discloses a flow path component in which a member forming a flow path and a filter member are fixed to each other by an adhesive.

[0004] In the flow channel member described in Patent Document 2, since the filter member is directly fixed to the member constituting the flow channel by an adhesive, there is a first problem that the adhesive flows into the meshes of the filter member due to capillary force and clogs the meshes.

[0005] On the other hand, in the recording head described in Patent Document 1, since the filter is fixed to the upstream flow channel component by welding without using an adhesive, the first problem described above does not occur. Here, in order to further improve the reliability of the structure constituting the flow channel, it is considered to use a thermosetting resin that is generally more rigid than a thermoplastic resin as a material constituting the structure. However, in the recording head described in Patent Document 1, since the upstream flow channel component needs to be composed of a thermoplastic resin in order to achieve the welding, a thermosetting resin cannot be used as a material constituting the upstream flow channel component. Therefore, in the recording head described in Patent Document 1, there is a second problem that further improvement in reliability cannot be achieved. Based on the above content, it is expected to solve both the first problem and the second problem described above.

[0006] Patent Document 1: Japanese Patent Application Publication No. 2016-49725

[0007] Patent Document 2: Japanese Patent Application Publication No. 2014-193556 Summary of the invention

[0008] In order to solve the above problems, the flow channel component involved in the preferred embodiment of the present invention has: a supply flow channel, which allows liquid to flow; a filter, which is arranged in the middle of the supply flow channel and allows liquid to pass through; a fixing component, which constitutes a part of the supply flow channel and fixes the filter; a first component, which constitutes a part of the supply flow channel and fixes the fixing component, the fixing component is made of thermoplastic resin, and the first component is made of any one of thermosetting resin, metal and ceramic.

[0009] Another preferred embodiment of the present invention involves a flow channel component comprising: a supply flow channel for liquid to flow; a filter, which is arranged in the middle of the supply flow channel and allows liquid to pass through; a fixing component, which constitutes a part of the supply flow channel and is composed of a thermosetting resin; a first component, which constitutes a part of the supply flow channel and is composed of any one of a thermosetting resin, a metal and a ceramic, the fixing component is formed by insert molding of the filter as an insert, and the first component and the fixing component are fixed to each other by an adhesive.

[0010] A liquid ejecting head according to a preferred embodiment of the present invention includes the flow path member according to any one of the above-described embodiments, and a nozzle that ejects liquid from the supply flow path.

[0011] A liquid ejecting apparatus according to a preferred embodiment of the present invention includes the liquid ejecting head according to the above-described embodiment, and a liquid container for storing liquid supplied to the liquid ejecting head.

[0012] The manufacturing method of the flow channel component involved in a preferred embodiment of the present invention is the following method, wherein the flow channel component comprises: a supply channel for liquid to flow; a filter, which is arranged in the middle of the supply channel and allows liquid to pass through; a fixing component, which constitutes a part of the supply channel and is composed of a thermoplastic resin; and a first component, which constitutes a part of the supply channel and is composed of any one of a thermosetting resin, a metal and a ceramic. In the manufacturing method of the flow channel component, after the filter and the fixing component are welded, the fixing component and the first component are bonded by an adhesive.

[0013] A preferred embodiment of the present invention involves a method for manufacturing a flow channel component, wherein the flow channel component comprises: a supply channel through which liquid flows; a filter, which is arranged in the middle of the supply channel and through which liquid passes; a fixing component, which constitutes a part of the supply channel and is made of a thermoplastic resin; and a first component, which constitutes a part of the supply channel and is made of any one of a thermosetting resin, a metal, and a ceramic. In the method for manufacturing the flow channel component, after the fixing component is formed by insert molding of the filter as an insert, the fixing component and the first component are bonded to each other by an adhesive. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram showing a configuration example of the liquid ejecting device according to the first embodiment.

[0015] Figure 2 It is a perspective view of a liquid ejecting module including the liquid ejecting head according to the first embodiment.

[0016] Figure 3 for Figure 2 An exploded perspective view of a liquid ejecting head is shown.

[0017] Figure 4 It is a top view of the head body of the liquid ejecting head.

[0018] Figure 5 A top view of the bracket.

[0019] Figure 6 A top view of the flow channel structure.

[0020] Figure 7 for Figure 6 AA line section view in.

[0021] Figure 8 A top view of the fixed component.

[0022] Fig. 9 This is an enlarged cross-sectional view for explaining the fixing state of the fixing member and the filter in the first embodiment.

[0023] Fig.10 It is a figure which shows the manufacturing process of the flow path component which concerns on 1st Embodiment.

[0024] Fig.11 It is a perspective view of a liquid ejecting module including a liquid ejecting head according to a second embodiment.

[0025] Fig.12 for Fig.11 An exploded perspective view of a liquid ejecting head is shown.

[0026] Fig.13 It is a diagram showing a flow path of a flow path component according to a second embodiment.

[0027] Fig.14 It is a cross-sectional view of a flow channel component according to the second embodiment.

[0028] Fig.15 It is a top view of the fixing member in the second embodiment.

[0029] Fig.16 This is an enlarged cross-sectional view for explaining a fixing state of a fixing member and a filter in the second embodiment.

[0030] Fig.17 It is a cross-sectional view of a flow channel component according to a third embodiment.

[0031] Fig.18 It is a cross-sectional view of a flow channel component according to a fourth embodiment.

[0032] Fig.19 It is a cross-sectional view of a flow channel component according to a fifth embodiment.

[0033] Fig. 20 It is a cross-sectional view of a flow channel component according to a sixth embodiment.

[0034] Fig.21 It is a diagram showing a manufacturing process of the flow path component according to the sixth embodiment.

[0035] Fig. 22 It is a cross-sectional view of the flow channel component involved in Modification Example 1.

[0036] Fig.23 It is a cross-sectional view of the flow channel component involved in the modification example 2.

[0037] Fig.24 It is a cross-sectional view of the flow channel component involved in Modification Example 3.

[0038] Fig.25 It is a cross-sectional view of a flow channel component according to Modification 4. DETAILED DESCRIPTION

[0039] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in the accompanying drawings, the size or scale of each part is appropriately different from the actual situation, and there are also parts schematically shown for easy understanding. In addition, as long as there is no record of particularly limiting the present invention in the following description, the scope of the present invention is not limited to these modes.

[0040] The following description is appropriately performed using the mutually intersecting X-axis, Y-axis, and Z-axis. In addition, a direction along the X-axis is referred to as the X1 direction, and the direction opposite to the X1 direction is referred to as the X2 direction. Similarly, directions opposite to each other along the Y-axis are referred to as the Y1 direction and the Y2 direction. In addition, directions opposite to each other along the Z-axis are referred to as the Z1 direction and the Z2 direction.

[0041] Here, typically, the Z axis is a vertical axis, and the Z2 direction is equivalent to the downward direction in the vertical direction. However, the Z axis may not be a vertical axis, and may be inclined relative to the vertical axis. In addition, although the X axis, the Y axis, and the Z axis are typically orthogonal to each other, they are not limited to this, and for example, they only need to intersect at an angle within a range of 80° or more and 100° or less.

[0042] 1. First Implementation

[0043] 1-1. Liquid ejecting device 100

[0044] Figure 1 1 is a schematic diagram showing a configuration example of a liquid ejecting device 100 according to the first embodiment. The liquid ejecting device 100 is an inkjet printing device that ejects ink, an example of a "liquid", as droplets onto a medium 101. The liquid ejecting device 100 of this embodiment is a so-called line-type printing device in which a plurality of nozzles for ejecting ink are distributed over the entire range in the width direction of the medium 101. The medium 101 is typically a printing paper. In addition, the medium 101 is not limited to the printing paper, and may be a printing object of any material such as a resin film or cloth.

[0045] like Figure 1 As shown in FIG. 1 , a liquid container 102 for storing ink is installed in the liquid ejecting device 100. Specific forms of the liquid container 102 include, for example, an ink cartridge that is detachable from the liquid ejecting device 100, a bag-shaped ink pack formed of a flexible film, and an ink tank that can replenish ink. In addition, the type of ink stored in the liquid container 102 is arbitrary.

[0046] Although not shown in the figure, the liquid container 102 of this embodiment includes a first liquid container and a second liquid container. The liquid container 102 stores the ink supplied to the liquid jet head 10 described later. The first ink is stored in the first liquid container. The second ink of a different type from the first ink is stored in the second liquid container. The first ink and the second ink are, for example, inks of different colors from each other. In addition, the first ink and the second ink may also be inks of the same type. The combination of inks is not particularly limited, and may be, for example, any combination of water-based inks, ultraviolet curing inks, or solvent-based inks in which color materials such as dyes or pigments are dissolved in water-based solvents.

[0047] In addition, solvent-based ink refers to an ink whose main solvent is an organic solvent, and is also called solvent ink or non-aqueous ink. Solvent-based ink is an ink containing one or more of glycol ethers, glycol ether esters, dibasic acid esters, ester solvents, hydrocarbon solvents, and alcohol solvents.

[0048] Examples of the glycol ether-based solvents include alkylene glycol monoethers and alkylene glycol diethers.

[0049] Examples of the alkylene glycol monoethers include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monohexyl ether, ethylene glycol monophenyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol monohexyl ether, diethylene glycol monobenzyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monobutyl ether, tetraethylene glycol monomethyl ether, tetraethylene glycol monoethyl ether, tetraethylene glycol monobutyl ether, pentaethylene glycol monomethyl ether, pentaethylene glycol monoethyl ether, pentaethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, dipropylene glycol monomethyl ether, and dipropylene glycol monoethyl ether.

[0050] Examples of the alkylene glycol diethers include ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol ethyl methyl ether, diethylene glycol dibutyl ether, diethylene glycol butyl methyl ether, triethylene glycol dimethyl ether, triethylene glycol diethyl ether, triethylene glycol dibutyl ether, triethylene glycol butyl methyl ether, tetraethylene glycol dimethyl ether, tetraethylene glycol diethyl ether, tetraethylene glycol dibutyl ether, propylene glycol dimethyl ether, propylene glycol diethyl ether, dipropylene glycol dimethyl ether, and dipropylene glycol diethyl ether.

[0051] Examples of glycol ether esters include ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monopropyl ether acetate, ethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, propylene glycol monobutyl ether acetate, dimethylene glycol monomethyl ether acetate, dimethylene glycol monoethyl ether acetate, dimethylene glycol monopropyl ether acetate, dimethylene glycol monobutyl ether acetate, diethylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monopropyl ether acetate, diethylene glycol monobutyl ether acetate, and dipropylene glycol monomethyl ether acetate. Ester, dipropylene glycol monoethyl ether acetate, dipropylene glycol monopropyl ether acetate, dipropylene glycol monobutyl ether acetate, trimethylene glycol monomethyl ether acetate, trimethylene glycol monoethyl ether acetate, trimethylene glycol monopropyl ether acetate, trimethylene glycol monobutyl ether acetate, triethylene glycol monomethyl ether acetate, triethylene glycol monoethyl ether acetate, triethylene glycol monopropyl ether acetate, triethylene glycol monobutyl ether acetate, tripropylene glycol monomethyl ether acetate, tripropylene glycol monoethyl ether acetate, tripropylene glycol monopropyl ether acetate, tripropylene glycol monobutyl ether acetate, 3-methoxybutyl acetate, 3-methoxy-3-methyl-1-butyl acetate and the like.

[0052] Examples of the dibasic acid esters include monoesters and diesters of dicarboxylic acids (for example, aliphatic dicarboxylic acids such as glutaric acid, adipic acid, and succinic acid). Specifically, examples include dimethyl-2-methylglutarate.

[0053] Examples of the ester solvent include methyl acetate, ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate, isobutyl acetate, isoamyl acetate, sec-butyl acetate, amyl acetate, methoxybutyl acetate, methyl lactate, ethyl lactate, butyl lactate, methyl caprylate, methyl laurate, isopropyl laurate, isopropyl myristate, isopropyl palmitate, isooctyl palmitate, isostearyl palmitate, methyl oleate, ethyl oleate, isopropyl oleate, butyl oleate, methyl linoleate, isobutyl linoleate, ethyl linoleate, isostearyl palmitate, Isopropyl stearate, soybean oil methyl ester, soybean oil isobutyl, tall oil methyl, tall oil isobutyl, diisopropyl adipate, diisopropyl sebacate, diethyl sebacate, propylene glycol monocaprylate, tri(2-ethylhexanoate) trimethylolpropane, tri(2-ethylhexanoate) glycerol, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, diethylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, etc.

[0054] Examples of the hydrocarbon solvent include aliphatic hydrocarbons (eg, paraffin, isoparaffin), alicyclic hydrocarbons (eg, cyclohexane, cyclooctane, cyclodecane, etc.), and aromatic hydrocarbons (eg, benzene, toluene, xylene, naphthalene, tetralin, etc.). As such hydrocarbon solvents, commercially available products can be used, and examples thereof include aliphatic hydrocarbons or alicyclic hydrocarbons such as IP Solution 1016, IP Solvent 1620, and IP Clean LX (all trade names of Idemitsu Kosan Co., Ltd.), Isopar (Isopar) G, Isopar L, Isopar H, Isopar M, Exxsol D40, Exxsol D80, Exxsol D100, Exxsol D130, and Exxsol D140 (all trade names of Exxon), NS Clean 100, NS Clean 110, NSClean 200, and NS Clean 220 (all trade names of JXTG Energy & Resources Co., Ltd.), Naphthesol 160, Naphthesol 200, and Naphthesol 220 (all trade names of JXTG Energy & Resources Co., Ltd.), Solvesso Aromatic hydrocarbons such as 200 (trade name manufactured by Exxon Corporation).

[0055] Examples of the alcohol solvent include methanol, ethanol, isopropanol, 1-propanol, 1-butanol, 2-butanol, 3-pentanol, 2-methyl-1-butanol, 2-methyl-2-butanol, isopentanol, 3-methyl-2-butanol, 3-methoxy-3-methyl-1-butanol, 4-methyl-2-pentanol, allyl alcohol, 1-hexanol, 1-heptanol, 2-heptanol, 3-heptanol, isomyristyl alcohol, isopalmityl alcohol, isostearyl alcohol, and oleyl alcohol.

[0056] Here, the ultraviolet curable ink refers to, for example, a UV ink containing a monomer or oligomer that is cured by initiating a polymerization reaction by ultraviolet irradiation. The composition of the ultraviolet curable ink may include, for example, an ink containing any one of (meth)acrylates, (meth)acrylamides, and N-vinyl compounds as a polymerizable compound.

[0057] Examples of the monofunctional (meth)acrylate include hexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, tert-octyl (meth)acrylate, isoamyl (meth)acrylate, decyl (meth)acrylate, isodecyl (meth)acrylate, stearyl (meth)acrylate, isostearyl (meth)acrylate, cyclohexyl (meth)acrylate, 4-n-butylcyclohexyl (meth)acrylate, bornyl (meth)acrylate, isobornyl (meth)acrylate, benzyl (meth)acrylate, 2-ethylhexyl diglycol (meth)acrylate, butoxyethyl (meth)acrylate, 2-chloroethyl (meth)acrylate, Ester, 4-bromobutyl (meth)acrylate, cyanoethyl (meth)acrylate, benzyl (meth)acrylate, butoxymethyl (meth)acrylate, 3-methoxybutyl (meth)acrylate, alkoxymethyl (meth)acrylate, alkoxyethyl (meth)acrylate, 2-(2-methoxyethoxy)ethyl (meth)acrylate, 2-(2-butoxyethoxy)ethyl (meth)acrylate, 2,2,2-tetrafluoroethyl (meth)acrylate, 1H,1H,2H,2H-perfluorodecyl (meth)acrylate, 4-butylphenyl (meth)acrylate, phenyl (meth)acrylate, 2,4,5-Tetramethylphenyl (meth)acrylate, 4-chlorophenyl (meth)acrylate, phenoxymethyl (meth)acrylate, phenoxyethyl (meth)acrylate, glycidyl (meth)acrylate, glycidyl (meth)acrylate, glycidyl (meth)acrylate, glycidyl (meth)acrylate, glycidyl (meth)acrylate, glycidyl (meth)acrylate, glycidyl (meth)acrylate, glycidyl (meth)acrylate, glycidyl (meth)acrylate, glycidyl (meth)acrylate, glycidyl (meth)acrylate, glycidyl (meth)acrylate, tetrahydrofurfuryl (meth)acrylate, hydroxyalkyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-Hydroxybutyl acrylate, 4-hydroxybutyl (meth)acrylate, dimethylaminoethyl (meth)acrylate, diethylaminoethyl (meth)acrylate, dimethylaminopropyl (meth)acrylate, diethylaminopropyl (meth)acrylate, trimethoxysilylpropyl (meth)acrylate, dicyclopentenyl (meth)acrylate, dicyclopentenyloxyethyl (meth)acrylate, trimethoxysilylpropyl (meth)acrylate, trimethylsilylpropyl (meth)acrylate, polyethylene oxide monomethyl ether (Meth)acrylate, oligoethylene oxide monomethyl ether (meth)acrylate, polyethylene oxide (meth)acrylate, oligoethylene oxide (meth)acrylate, oligoethylene oxide monoalkyl ether (meth)acrylate, polyethylene oxide monoalkyl ether (meth)acrylate, dipropylene glycol (meth)acrylate, polypropylene oxide monoalkyl ether (meth)acrylate, oligopropylene oxide monoalkyl ether (meth)acrylate, 2-methacryloyloxyethyl succinate, 2-methacryloyloxyhexahydrophthalate Acid, 2-methacryloyloxyethyl-2-hydroxypropyl phthalate, butoxydiethylene glycol (meth)acrylate, trifluoroethyl (meth)acrylate, perfluorooctylethyl (meth)acrylate, 2-hydroxy-3-phenoxypropyl (meth)acrylate, EO-modified phenol (meth)acrylate, EO-modified cresol (meth)acrylate, EO-modified nonylphenol (meth)acrylate, PO-modified nonylphenol (meth)acrylate, EO-modified-2-ethylhexyl (meth)acrylate.

[0058] Examples of the polyfunctional (meth)acrylate include 1,6-hexanediol di(meth)acrylate, 1,10-decanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, dipropylene glycol di(meth)acrylate (DPGD(M)A), tripropylene glycol di(meth)acrylate (TPGD(M)A), 2,4-dimethyl-1,5-pentanediol di(meth)acrylate, butylethylpropylene glycol di(meth)acrylate, ethoxylated cyclohexanemethanol di(meth)acrylate, triethylene glycol di(meth)acrylate (TEGD(M)A), polyethylene glycol di(meth)acrylate, oligoethylene glycol di(meth)acrylate, and ethylene glycol di(meth)acrylate. difunctional (meth)acrylates such as 1,4-butanediol di(meth)acrylate, 2-ethyl-2-butyl-butanediol di(meth)acrylate, hydroxypivalate neopentyl glycol di(meth)acrylate, dihydroxymethyl tricyclodecane di(meth)acrylate, EO-modified bisphenol A di(meth)acrylate, bisphenol F polyethoxy di(meth)acrylate, polypropylene glycol di(meth)acrylate, oligopropylene glycol di(meth)acrylate, 1,4-butanediol di(meth)acrylate, 2-ethyl-2-butyl-propanediol di(meth)acrylate, 1,9-nonanediol di(meth)acrylate, propoxylated ethoxylated bisphenol A di(meth)acrylate, and tricyclodecane di(meth)acrylate.

[0059] In addition, examples of the polyfunctional (meth)acrylate include trifunctional (meth)acrylates, trimethylolpropane tri(meth)acrylate, trimethylolethane tri(meth)acrylate, alkylene oxide-modified tri(meth)acrylate of trimethylolpropane, pentaerythritol tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, trimethylolpropane tri((meth)acryloyloxypropyl) ether, isocyanuric acid alkylene oxide-modified tri(meth)acrylate, propionate dipentaerythritol tri(meth)acrylate, tri(meth)acryloyloxyethyl) isocyanurate, hydroxypivalaldehyde-modified dimethylolpropane tri(meth)acrylate, sorbitol tri(meth)acrylate, propoxylated trihydroxypropane tri(meth)acrylate, and the like. Methylpropane tri(meth)acrylate, ethoxylated tri(meth)acrylate; tetrafunctional (meth)acrylate, pentaerythritol tetra(meth)acrylate, sorbitol tetra(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, dipentaerythritol propionate tetra(meth)acrylate, ethoxylated pentaerythritol tetra(meth)acrylate; pentafunctional (meth)acrylate, sorbitol penta(meth)acrylate, dipentaerythritol penta(meth)acrylate; hexafunctional (meth)acrylate, dipentaerythritol hexa(meth)acrylate, sorbitol hexa(meth)acrylate, phosphazene alkylene oxide-modified hexa(meth)acrylate, caprolactone-modified dipentaerythritol hexa(meth)acrylate.

[0060] Examples of the (meth)acrylamides include (meth)acrylamide, N-methyl (meth)acrylamide, N-ethyl (meth)acrylamide, N-propyl (meth)acrylamide, N-n-butyl (meth)acrylamide, N-tert-butyl (meth)acrylamide, N-butoxymethyl (meth)acrylamide, N-isopropyl (meth)acrylamide, N-methylol (meth)acrylamide, N,N-dimethyl (meth)acrylamide, N,N-diethyl (meth)acrylamide, and (meth)acryloyl morpholine.

[0061] N-vinyl compounds have a structure in which a vinyl group is bonded to nitrogen (>N-CH=CH 2 ). Specific examples of N-vinyl compounds include N-vinyl formamide, N-vinyl carbazole, N-vinyl indole, N-vinyl pyrrole, N-vinylacetamide, N-vinyl pyrrolidone, N-vinyl caprolactam, and derivatives thereof. Among these compounds, N-vinyl caprolactam is particularly preferred.

[0062] The liquid injection device 100 includes a control unit 20, a conveying mechanism 30, a liquid injection module 40, and a circulation mechanism 50. The control unit 20 controls the operation of each element of the liquid injection device 100. The control unit 20 includes, for example, a processing circuit such as a CPU (Central Processing Unit) or an FPGA (Field Programmable Gate Array), and a storage circuit such as a semiconductor memory. Various programs and various data are stored in the storage circuit. The processing circuit implements various controls by executing the program and appropriately using the data.

[0063] The transport mechanism 30 transports the medium 101 in the direction DM based on the control performed by the control unit 20. The direction DM in this embodiment is the Y2 direction. Figure 1 In the example shown, the conveying mechanism 30 includes a conveying roller that is elongated along the X-axis and a motor that rotates the conveying roller. In addition, the conveying mechanism 30 is not limited to a structure using a conveying roller, and may be a structure using, for example, a roller or an endless belt that conveys the medium 101 in a state where the medium 101 is adsorbed on the outer peripheral surface by electrostatic force or the like.

[0064] The liquid ejection module 40 ejects ink supplied from the liquid container 102 via the circulation mechanism 50 to the medium 101 from each of the plurality of nozzles along the Z2 direction based on the control implemented by the control unit 20. The liquid ejection module 40 is a line head having a plurality of liquid ejection heads 10, and the plurality of liquid ejection heads 10 are configured in a manner that the plurality of nozzles are distributed across the entire range of the medium 101 in the direction of the X axis. That is, the plurality of liquid ejection heads 10 constitute a line head that is long and narrow in the extension direction of the X axis. By ejecting ink from the plurality of liquid ejection heads 10 in parallel with the conveying of the medium 101 by the conveying mechanism 30, an image generated by the ink is formed on the surface of the medium 101. In addition, the liquid ejection module 40 may also be a line head that is long and narrow in the extension direction of the X axis and is composed of only a single liquid ejection head 10, and the single liquid ejection head is configured in a manner that the plurality of nozzles are distributed across the entire range of the medium 101 in the extension direction of the X axis.

[0065] exist Figure 1 In the example shown, the liquid container 102 is connected to the liquid injection module 40 via a circulation mechanism 50. The circulation mechanism 50 is a mechanism for supplying ink to the liquid injection module 40 and recovering the ink discharged from the liquid injection module 40 in order to resupply the liquid injection module 40. The circulation mechanism 50, for example, has a sub-tank for storing ink, a supply flow channel for supplying ink from the sub-tank to the liquid injection module 40, a recovery flow channel for recovering ink from the liquid injection module to the sub-tank, and a pump for making the ink flow appropriately. These components are respectively provided for the first ink and the second ink described above. Through the operation of the above circulation mechanism 50, it is possible to suppress the viscosity increase of the ink or reduce the retention of bubbles in the ink.

[0066] In addition, the liquid ejection device 100 may also have a maintenance mechanism used in the maintenance operation of the liquid ejection module 40. The maintenance operation includes, for example, a flushing operation and a cleaning operation. The flushing operation is an operation of forcibly ejecting ink that does not directly contribute to the formation of an image from a plurality of nozzles. The cleaning operation is an operation of forcibly discharging the ink inside the liquid ejection module 40 from a plurality of nozzles by pressurizing from the upstream side of the liquid ejection module 40 or sucking from the downstream side. The maintenance mechanism includes a flushing box that accommodates the ink ejected from each nozzle N by the flushing operation, and a cover that seals the plurality of nozzles N when the cleaning operation is performed.

[0067] As described above, the liquid ejecting apparatus 100 includes the liquid ejecting head 10 , the liquid container 102 storing ink supplied to the liquid ejecting head 10 , and the transport mechanism 30 transporting the medium 101 receiving the ink from the liquid ejecting head 10 .

[0068] 1-2. Liquid ejection module 40

[0069] Figure 2 FIG. 4 is a perspective view of a liquid ejection module 40 having a liquid ejection head 10 according to the first embodiment. Figure 2 As shown in FIG. 1 , the liquid ejection module 40 includes a support body 41 and a plurality of liquid ejection heads 10. The support body 41 is a component for supporting the plurality of liquid ejection heads 10. Figure 2 In the example shown, the support body 41 is a plate-shaped member made of metal or the like, and is provided with mounting holes 41a for mounting a plurality of liquid ejecting heads 10. The plurality of liquid ejecting heads 10 are inserted into the mounting holes 41a in a state of being arranged in a direction along the X-axis, and each liquid ejecting head 10 is fixed to the support body 41 by screwing. Figure 2 In the figure, two liquid ejection heads 10 are representatively shown. In addition, the number of liquid ejection heads 10 in the liquid ejection module 40 is arbitrary. In addition, the shape of the support body 41 is not limited to Figure 2 The examples shown are not examples, but rather any arbitrary shapes.

[0070] 1-3. Liquid ejecting head 10

[0071] Figure 3 for Figure 2 The exploded perspective view of the liquid ejecting head 10 is shown in FIG. Figure 3 As shown, the liquid jet head 10 has a flow channel structure 11, a wiring substrate 12, a bracket 13, a plurality of head bodies 14_1, 14_2, 14_3, 14_4, 14_5 and 14_6, a fixing plate 15 and a base 16. These components are arranged in the order of the base 16, the flow channel structure 11, the wiring substrate 12, the bracket 13, the plurality of head bodies 14_1, 14_2, 14_3, 14_4, 14_5 and 14_6, and the fixing plate 15 toward the Z2 direction. Hereinafter, each part of the liquid jet head 10 will be described in sequence. In addition, in the following text, the head bodies 14_1, 14_2, 14_3, 14_4, 14_5 and 14_6 are sometimes referred to as the head bodies 14, respectively.

[0072] The flow channel structure 11 is a structure having a flow channel provided therein for allowing ink to flow between the circulation mechanism 50 and the plurality of head main bodies 14. Figure 3 As shown, the flow channel structure 11 has a flow channel component 1 and connecting pipes 11a, 11b, 11c and 11d. Figure 3Although not shown in the figure, in the flow channel component 1, there are provided a supply flow channel for supplying the first ink to the plurality of head bodies 14, a supply flow channel for supplying the second ink to the plurality of head bodies 14, a discharge flow channel for discharging the first ink from the plurality of head bodies 14, and a discharge flow channel for discharging the second ink from the plurality of head bodies 14. In addition, a filter for catching foreign matter and the like is provided in the middle of each supply flow channel. The internal structure of the flow channel component 1 will be described in detail later.

[0073] The flow channel component 1 has layers 21, 22, and 23, and these layers are laminated in this order in the Z2 direction. By appropriately providing grooves or holes in these layers, flow channels such as a supply flow channel and a discharge flow channel are formed. The layers 21, 22, and 23 are respectively made of, for example, resin materials and are formed by injection molding. The layers 21, 22, and 23 are bonded to each other by, for example, an adhesive. In addition, the thicknesses of the layers 21, 22, and 23 along the Z axis may be the same as each other or different from each other.

[0074] The flow channel component 1 is in the shape of a plate extending in a direction perpendicular to the Z axis. Figure 3 In the example shown, a hole 1a into which a connector 12c described later is inserted is provided in the flow path member 1. Connection pipes 11a, 11b, 11c, and 11d protrude from the surface of the flow path member 1 facing the Z1 direction.

[0075] The connection tube 11a is a tube body constituting a flow path for supplying the first ink to the flow path member 1. In addition, the connection tube 11b is a tube body constituting a flow path for supplying the second ink to the flow path member 1. On the other hand, the connection tube 11c is a tube body constituting a flow path for discharging the first ink from the flow path member 1. In addition, the connection tube 11d is a tube body constituting a flow path for discharging the second ink from the flow path member 1.

[0076] The wiring substrate 12 is a mounting component for electrically connecting a plurality of head bodies 14 to an aggregate substrate 16b described later. The wiring substrate 12 is, for example, a rigid wiring substrate. The wiring substrate 12 is disposed between the flow channel structure 11 and the bracket 13, and a connector 12c is provided on the surface of the wiring substrate 12 that is opposite to the flow channel structure 11. The connector 12c is a connecting component connected to the aggregate substrate 16b described later. In addition, a plurality of holes 12a and a plurality of openings 12b are provided on the wiring substrate 12. Each hole 12a is a hole for allowing the flow channel structure 11 to be connected to the bracket 13. Each opening 12b is a hole through which a wiring component 14a for connecting the head body 14 to the wiring substrate 12 passes. The wiring component 14a is connected to the surface of the wiring substrate 12 facing the Z1 direction. The wiring member 14 a includes wiring electrically connected to a driving element Ea or Eb described later, and is, for example, an FPC (Flexible Printed Circuits) or a COF (Chip On Film).

[0077] The bracket 13 is a structure for accommodating and supporting a plurality of head bodies 14. The bracket 13 is made of, for example, a resin material or a metal material. The bracket 13 is in the shape of a plate extending in a direction perpendicular to the Z axis. A plurality of ink holes 13a and a plurality of wiring holes 13b are provided on the bracket 13. Each ink hole 13a is an opening on the side of the flow channel structure 11 in the flow channel for allowing ink to flow between the head body 14 and the flow channel structure 11. Each wiring hole 13b is a hole through which a wiring component 14a for connecting the head body 14 to the wiring substrate 12 passes. Although not shown in the figure, the inside of the bracket 13 has a supply flow channel for supplying the first ink to the head body 14, a supply flow channel for supplying the second ink to the head body 14, a circulation flow channel for causing the first ink to flow from the head body 14 to the discharge flow channel CM of the flow channel structure 11, and a circulation flow channel for causing the second ink to flow from the head body 14 to the discharge flow channel CM of the flow channel structure 11. Although not shown in the figure, a branch flow channel for distributing or collecting ink between each ink hole 13a and the plurality of head main bodies 14 is provided inside the bracket 13. Although not shown in the figure, a plurality of recesses for accommodating the plurality of head main bodies 14 are provided on the surface of the bracket 13 facing the Z2 direction.

[0078] Each head body 14 ejects ink. Figure 3 Although not shown in the figure, each head body 14 has a plurality of nozzles for ejecting the first ink and a plurality of nozzles for ejecting the second ink. These nozzles are arranged on the surface facing the Z2 direction, that is, the nozzle surface FN of each head body 14. The structure of the head body 14 will be described later.

[0079] The fixing plate 15 is a plate member for fixing the plurality of head bodies 14 to the bracket 13. Specifically, the fixing plate 15 is arranged in a state where the plurality of head bodies 14 are sandwiched between the fixing plate 15 and the bracket 13, and is fixed to the bracket 13 by an adhesive. The fixing plate 15 is made of, for example, a metal material. The fixing plate 15 is provided with a plurality of openings 15a for exposing the nozzles of the plurality of head bodies 14. Figure 3 In the example shown, the plurality of openings 15a are provided individually for each head main body 14. Alternatively, the opening 15a may be shared by two or more head main bodies 14.

[0080] The base 16 is a member for fixing the flow channel structure 11, the wiring substrate 12, the bracket 13, the plurality of head main bodies 14, and the fixing plate 15 to the aforementioned support body 41. The base 16 has a main body 16a, an assembly substrate 16b, and a cover 16c.

[0081] The main body 16a is fixed to the bracket 13 by screwing, etc., so as to hold the flow channel structure 11 and the wiring substrate 12 arranged between the base 16 and the bracket 13. The main body 16a is made of, for example, a resin material. The main body 16a has a plate-shaped portion that is opposite to the flow channel component 1 described above, and a plurality of holes 16d for inserting the connecting pipes 11a, 11b, 11c and 11d described above are provided on the plate-shaped portion. In addition, the main body 16a has a portion extending from the plate-shaped portion in the Z2 direction, and a flange 16e for fixing to the support body 41 described above is provided at the top of the portion.

[0082] The assembly substrate 16b is a mounting component for electrically connecting the control unit 20 to the wiring substrate 12 described above. The assembly substrate 16b is, for example, a rigid wiring substrate. The cover 16c is a plate-shaped component for protecting the assembly substrate 16b and fixing the assembly substrate 16b to the main body 16a. The cover 16c is made of, for example, a resin material and is fixed to the main body 16a by screwing.

[0083] 1-4. Head body 14

[0084] Figure 4 FIG. 1 is a top view of the head body 14 of the liquid ejecting head 10. Figure 4 , the internal structure of the head body 14 when viewed in the Z1 direction is schematically illustrated. Figure 4As shown, the head body 14 includes a liquid ejecting section Qa and a liquid ejecting section Qb. The liquid ejecting section Qa includes a nozzle array La, which is composed of a plurality of nozzles N ejecting the first ink supplied from the circulation mechanism 50 described above. The liquid ejecting section Qb includes a nozzle array Lb, which is composed of a plurality of nozzles N ejecting the second ink supplied from the circulation mechanism 50. The plurality of nozzles N in the nozzle array La and the nozzle array Lb are arranged in the direction DN.

[0085] The liquid ejection unit Qa includes a liquid storage chamber Ra, a plurality of pressure chambers Ca, and a plurality of driving elements Ea. The liquid storage chamber Ra is a common liquid chamber that is continuous across a plurality of nozzles N of the nozzle array La. The pressure chamber Ca and the driving element Ea are provided for each nozzle N of the nozzle array La, respectively. The pressure chamber Ca is a space connected to the nozzle N. The plurality of pressure chambers Ca are respectively filled with the first ink supplied from the liquid storage chamber Ra. The driving element Ea changes the pressure of the first ink in the pressure chamber Ca. The driving element Ea is, for example, a piezoelectric element that changes the volume of the pressure chamber Ca by deforming the wall surface of the pressure chamber Ca, or a heating element that generates bubbles in the pressure chamber Ca by heating the first ink in the pressure chamber Ca. The driving element Ea changes the pressure of the first ink in the pressure chamber Ca, so that the first ink in the pressure chamber Ca is ejected from the nozzle N.

[0086] The liquid ejection unit Qb has a liquid storage chamber Rb, a plurality of pressure chambers Cb, and a plurality of driving elements Eb, similarly to the liquid ejection unit Qa. The liquid storage chamber Rb is a common liquid chamber that is continuous across a plurality of nozzles N of the nozzle array Lb. The pressure chamber Cb and the driving element Eb are provided separately for each nozzle N of the nozzle array Lb. The plurality of pressure chambers Cb are respectively filled with the second ink supplied from the liquid storage chamber Rb. The driving element Eb is, for example, the piezoelectric element or the heating element described above. The pressure of the second ink in the pressure chamber Cb is changed by the driving element Eb, so that the second ink in the pressure chamber Cb is ejected from the nozzle N.

[0087] like Figure 4 As shown, the head body 14 is provided with an inlet Ra_in, an outlet Ra_out, an inlet Rb_in, and an outlet Rb_out. The inlet Ra_in and the outlet Ra_out are respectively communicated with the liquid storage chamber Ra. The inlet Rb_in and the outlet Rb_out are respectively communicated with the liquid storage chamber Rb.

[0088] In the head main body 14 described above, the first ink which is not ejected from each nozzle N of the nozzle array La and is stored in the liquid storage chamber Ra is circulated sequentially through the discharge port Ra_out, the circulation flow path for the first ink in the bracket 13, the discharge flow path for the first ink in the flow path structure 11, the sub-tank for the first ink in the circulation mechanism 50, the supply flow path for the first ink in the flow path structure 11, the supply flow path for the first ink in the bracket 13, the introduction port Ra_in, and the liquid storage chamber Ra. Similarly, the second ink which is not ejected from each nozzle N of the nozzle array Lb and is stored in the liquid storage chamber Rb is circulated sequentially through the discharge port Rb_out, the circulation flow path for the second ink in the bracket 13, the discharge flow path for the second ink in the flow path structure 11, the sub-tank for the second ink in the circulation mechanism 50, the supply flow path for the second ink in the flow path structure 11, the supply flow path for the second ink in the bracket 13, the introduction port Rb_in, and the liquid storage chamber Rb.

[0089] Figure 5 FIG. 1 is a top view of the bracket 13. Figure 5 As shown, six head bodies 14_1 to 14_6 are held on the bracket 13. These head bodies are arranged in the order of head bodies 14_1, 14_4, 14_2, 14_5, 14_3, and 14_6 in the X2 direction. Here, the head bodies 14_1 to 14_3 are arranged at positions offset in the Y1 direction relative to the head bodies 14_4 to 14_6. However, the head bodies 14_1 to 14_6 have portions that overlap each other when viewed in the X1 direction or the X2 direction. In addition, the head bodies 14_1 to 14_6 are arranged in such a manner that the extension directions DN of the nozzle arrays La and Lb are parallel to each other. However, each of the head bodies 14_1 to 14_6 is arranged in such a manner that the direction DN is inclined relative to the direction DM that is the conveying direction of the medium 101.

[0090] As described above, the liquid ejecting head 10 has the flow path member 1 and the nozzles N that eject ink from the supply flow path.

[0091] 1-5. Flow channel component 1

[0092] Figure 6 FIG. 1 is a top view of the flow channel structure 11. Figure 6 In FIG. 1 , an example of the structure inside the flow channel component 1 when viewed in the Z2 direction is shown by a dotted line. Figure 6 As shown, two supply flow channels CC, two discharge flow channels CM and two filter chambers RF are provided inside the flow channel component 1 .

[0093] One of the two supply channels CC is a channel for supplying ink from the connecting tube 11a to the liquid storage chamber Ra of each head body 14, while the other supply channel CC is a channel for supplying ink from the connecting tube 11b to the liquid storage chamber Rb of each head body 14. Each supply channel CC is connected to a discharge port CE for discharging ink toward the head body 14. In addition, the supply channel CC is connected to the internal space of the connecting tube 11a or 11b via the filter chamber RF. The filter chamber RF is a space in which the filter 25 described later is provided, and is connected to the supply channel CC via the first channel C1 and the second channel C2. In addition, one of the first channel C1 and the second channel C2 may be omitted. In this case, it is preferred that the other of the first channel C1 and the second channel C2 is arranged on the central axis of the filter chamber RF.

[0094] One of the two discharge flow passages CM is a flow passage for discharging ink from the liquid storage chamber Ra of each head body 14 to the connecting tube 11c, and the other discharge flow passage CM is a flow passage for discharging ink from the liquid storage chamber Rb of each head body 14 to the connecting tube 11d. Each discharge flow passage CM is connected to an inlet CI for supplying ink from the head body 14.

[0095] Figure 7 for Figure 6 In the AA line section view. Figure 7 In FIG. 1 , the structure corresponding to the connecting pipe 11a is shown with respect to the flow channel component 1. Figure 7 In order to facilitate observation, the following description is omitted. Fig. 9 Illustrations of adhesives B1, B2 and Ba are shown.

[0096] Hereinafter, the structure corresponding to the connection pipe 11a will be described representatively. The structure corresponding to the connection pipe 11b is the same as the structure corresponding to the connection pipe 11a. In addition, the structures corresponding to the connection pipes 11c and 11d are the same as the structure corresponding to the connection pipe 11a except that the structure related to the filter chamber RF is omitted and the shapes are different.

[0097] like Figure 7As shown, in the flow channel component 1, layers 21, 22, and 23 are laminated in this order in the Z2 direction. The layers 21, 22, and 23 are respectively composed of a thermosetting resin, a metal, or a ceramic. Therefore, compared with the case where the layers 21, 22, and 23 are composed of a thermoplastic resin, the liquid resistance and rigidity of the layers 21, 22, and 23 can be improved. Here, the structural materials of the layers 21, 22, and 23 can be the same as each other or different from each other. For example, one of the layers 21, 22, and 23 can be composed of a thermosetting resin, and the other layers can be composed of a metal or a ceramic.

[0098] In the case where the layers 21, 22 or 23 are formed by thermosetting resins, although not particularly limited, examples of the thermosetting resins include phenolic resins, urea resins, melamine resins, epoxy resins, alkyd resins, unsaturated polyester resins, epoxy resins, diallyl phthalate resins, etc. These resins may be used alone, or two or more resins may be combined in the form of copolymers or blends. In addition, the thermosetting resin may include, for example, fiber substrates such as glass fibers, or fillers such as silica powder. By using such fiber substrates or fillers, the rigidity of the layers 21, 22 or 23 can be improved compared to a structure using only thermosetting resins. In addition, colorants such as dyes or pigments may also be included in the thermosetting resin. Since the light transmittance of the thermosetting resin is reduced by using a colorant, even when the ink has photocurability or the light resistance of the ink is reduced, the deterioration of the ink can be reduced.

[0099] When the layer 21, 22 or 23 is composed of a metal, although it is not particularly limited, examples of the metal include aluminum, aluminum alloys, titanium, titanium alloys, iron, and stainless steel. These metals may be used alone or in combination of two or more metals in a lamination or the like. When the layer 21, 22 or 23 is composed of a ceramic, although it is not particularly limited, examples of the ceramic include oxide ceramics such as alumina, silica, titanium dioxide, and zirconium oxide, and nitride ceramics such as silicon nitride, aluminum nitride, and titanium nitride. These ceramics may be used alone or in combination of two or more ceramics in a lamination or the like.

[0100] The layer 21 is provided with a concave surface 21a, an inlet 21b, and a groove 21c. The concave surface 21a is provided on the surface of the layer 21 facing the Z2 direction and constitutes a part of the wall surface of the filter chamber RF. Figure 7 In the example shown, the concave surface 21a has a shape that becomes deeper and deeper toward the introduction port 21b. The introduction port 21b is a through hole that opens on the concave surface 21a and communicates with the internal space of the connecting pipe 11a. Figure 7 In the example shown, the connecting tube 11a is formed integrally with the layer 21. Therefore, the connecting tube 11a is formed of the same resin material as the layer 21. The groove 21c is provided on the surface of the layer 21 facing the Z2 direction along the outer periphery of the concave surface 21a, and constitutes a space for accommodating a part of the fixing member 24 described later. The groove 21c can also function as a retreat portion for the adhesive.

[0101] Alternatively, the connection pipe 11a may be formed separately from the layer 21. In this case, the connection pipe 11a may be formed of a metal material or the like and fixed to the layer 21 by an adhesive or the like. The groove 21c may be provided as required and may be omitted.

[0102] The layer 22 is provided with a recess 22a, a groove 22b, a hole 22c, and a hole 22d. The recess 22a is provided on the surface of the layer 22 facing the Z1 direction, and constitutes a space for accommodating a part of the fixing member 24 described later. The groove 22b is provided on the surface of the layer 22 facing the Z2 direction, and constitutes a part of the flow channel C3 in the supply flow channel CC. Figure 6 In the example shown in FIG. 7 , the flow channel C3 is shaped to extend along the Y axis and has a portion whose area on the XZ plane narrows toward the Y2 direction. Therefore, the groove 22b is shaped to extend along the Y axis. The hole 22c and the hole 22d are holes that open on the recess 22a and the groove 22b, respectively, and penetrate the layer 22. Figure 7 In the example shown, the hole 22c is connected to the end edge of the groove 22b in the Y2 direction. The hole 22d is connected to the groove 22b at a position closer to the hole 22c in the Y1 direction.

[0103] The layer 23 is provided with a groove 23a. The groove 23a is provided on the surface of the layer 23 facing the Z1 direction and constitutes a part of the flow channel C3. Figure 7 In the example shown, the groove 23a is shaped to extend along the Y axis. Figure 7 In the illustrated example, the supply flow channel CC is formed by the groove 22 b of the layer 22 and the groove 23 a of the layer 23 , but the flow channel C3 may be formed by either the groove 22 b or the groove 23 a .

[0104] like Figure 7 As shown, in addition to the above layers 21, 22 and 23, the flow channel component 1 also has a fixing component 24 and a filter 25 between the layer 21 and the layer 22. In addition, hereinafter, observation in the direction where the layer 22 and the fixing component 24 overlap is referred to as "top view".

[0105] Figure 8 FIG. 2 is a top view of the fixing component 24 . Fig. 9 FIG. 2 is an enlarged cross-sectional view for explaining the fixing state of the fixing member 24 and the filter 25 in the first embodiment. Figure 7 to Figure 9 The fixing member 24 and the filter 25 will be described.

[0106] like Figure 7 As shown, the fixing member 24 is a substantially plate-shaped member that fixes the filter 25 to at least one of the layer 21 and the layer 22 and constitutes a part of the wall surface of the filter chamber RF. Figure 7 In the example shown, the fixing member 24 is arranged in the recess 22 a described above.

[0107] like Fig. 9 As shown, the fixing member 24 is fixed to the layer 22 by the adhesive B1 as an example of the "first adhesive", and is fixed to the layer 21 by the adhesive B2 as an example of the "second adhesive". Although the adhesives B1 and B2 only need to have resistance to ink and be able to bond the fixing member 24 to the layer 21 or 22, and various adhesives can be used without particular limitation, for example, epoxy adhesives, silicone adhesives, and p-aminophenol adhesives can be listed, among which epoxy adhesives are preferably used from the viewpoint of excellent liquid resistance. In addition, although various photocurable adhesives such as polyurethane adhesives can be used as adhesives B1 and B2, and in this case, any of visible light curing type and ultraviolet curing type can be used, ultraviolet curing type is preferably used from the viewpoint of preventing adverse effects caused by heat during curing.

[0108] Adhesives B1 and B2 may be the same as or different from each other. In addition, adhesive B1 or B2 may be the same as or different from adhesive Ba that bonds layer 21 and layer 22. In addition, two or more of adhesives B1, B2 and Ba may be integrated. In addition, one of adhesives B1 and B2 may be omitted. However, by using both adhesives B1 and B2, the fixation of fixing component 24 relative to the laminate composed of layers 21 to 23 can be strengthened, and the unintentional gap between the laminate and fixing component 24 can be reduced.

[0109] In this way, by fixing the filter 25 to at least one of the layers 21 and 22 via the fixing component 24, the range of choices of structural materials for the layers 21 and 22 can be expanded, or the situation where the adhesive B1 or B2 is unintentionally attached to the filter 25 can be reduced, compared with the structure in which the filter 25 is directly fixed to at least one of the layers 21 and 22.

[0110] The fixing member 24 is made of a resin material and is formed by, for example, injection molding. The structural material of the fixing member 24 may be the same as or different from the structural material of the layer 21 or the layer 22 .

[0111] Here, the resin material constituting the fixing member 24 may be either a thermosetting resin or a thermoplastic resin. However, which of the thermosetting resin and the thermoplastic resin is used to constitute the fixing member 24 is appropriately determined according to the shape of the fixing member 24. In addition, the resin material constituting the fixing member 24 may include, for example, a fiber base material such as glass fiber, or a filler such as silica powder. By using such a fiber base material or a filler, the rigidity of the fixing member 24 can be improved compared to a structure using only resin.

[0112] When the fixing member 24 is made of a thermosetting resin, the rigidity and liquid resistance of the fixing member 24 can be improved compared to when the fixing member 24 is made of a thermoplastic resin.

[0113] Although not particularly limited, examples of the thermosetting resin include phenolic resin, urea resin, melamine resin, epoxy resin, alkyd resin, unsaturated polyester resin, epoxy resin, diallyl phthalate resin, etc., as in the above-mentioned layers 21, 22, or 23. These resins may be used alone or in combination of two or more in the form of a copolymer or a blend.

[0114] When the fixing member 24 is made of a thermoplastic resin, the filter 25 can be fixed to the fixing member 24 by welding. Therefore, when the fixing member 24 is made of a thermoplastic resin, it is useful when it is difficult to form the fixing member 24 by insert molding using the filter 25 as an insert due to the shape of the fixing member 24. In the present embodiment, since the filter 25 is arranged on the outer surface of the fixing member 24, it is difficult to form the fixing member 24 by insert molding using the filter 25 as an insert. Therefore, in the present embodiment, it is preferable to form the fixing member 24 by a thermoplastic resin.

[0115] Although not particularly limited, examples of the thermoplastic resin include polyphenylene ether resin (PPE), modified polyphenylene ether resin (m-PPE), polyethylene resin (PE), polystyrene resin (PS), polyamide resin (PA), polyphenylene sulfide (PPS), polypropylene (PP), liquid crystal polymer (LCP), acrylonitrile butadiene styrene resin (ABS resin), vinyl chloride-vinyl acetate copolymer resin, polyvinyl chloride resin, etc. These resins can be used alone or in combination with two or more resins in the form of copolymers or blends. Among them, since injection molding can be performed as the thermoplastic resin and chemical resistance is excellent, for example, a polyolefin-based thermoplastic resin such as polypropylene is preferably used.

[0116] The fixing member 24 is provided with a recessed portion 24 a , a frame portion 24 b , a first discharge port 24 c , and a second discharge port 24 d .

[0117] The recessed portion 24a is provided on the surface of the fixing member facing the Z1 direction, and constitutes a part of the wall surface of the filter chamber RF. Figure 7 In the example shown, the recess 24a is shaped to become deeper continuously toward the first discharge port 24c and the second discharge port 24d, respectively. The frame portion 24b is an annular wall portion along the outer peripheral edge of the recess 24a, and constitutes the side wall of the filter chamber RF. More specifically, a portion of the inner peripheral surface of the frame portion 24b constitutes the side wall 24i of the downstream chamber R2. In addition, the frame portion 24b has a loading surface 24p for loading the filter 25, a convex portion 24r protruding from the loading surface 24p in the Z1 direction, and a cutout portion 24q. The loading surface 24p is a surface of the frame portion 24b that faces the Z1 direction, and has a Figure 8 As shown in FIG. 1 , the annular shape surrounds the recess 24a when viewed from above. Figure 8 As shown, the convex portion 24r has an annular shape surrounding the mounting surface 24p in a plan view. The cutout portion 24q is a stepped and annular cutout that is recessed in the Z1 direction relative to the surface of the frame portion 24b facing the Z2 direction and is arranged at the outermost periphery of the frame portion 24b when viewed in the Z1 direction.

[0118] exist Figure 7In the example shown, the convex portion 24r of the frame portion 24b is inserted into the groove 21c described above. By this insertion, the fixing member 24 is positioned relative to the layer 21. In addition, the convex portion 24r of the frame portion 24b functions as a wall portion to prevent the adhesive B2 and the adhesive Ba from being attached to the filter 25 by abutting against the bottom of the groove 21c. In addition, a gap is formed between the outer peripheral surface of the frame portion 24b and the recess 22a. The gap can function as a retreat portion for the adhesive B1 applied between the cutout portion 24q and the bottom surface of the recess 22a, and the adhesive B2 and the adhesive Ba applied between the outer peripheral surface of the convex portion 24r and the groove 21c. The first discharge port 24c and the second discharge port 24d are respectively holes that open on the recess 24a and penetrate the fixing member 24. In addition, the first discharge port 24c is connected to the hole 22c described above, and together with the hole 22c, it constitutes the first flow channel C1. The second outlet 24d is connected to the hole 22d mentioned above, and together with the hole 22d, forms a second flow channel C2.

[0119] In addition, if Figure 8 As shown, a flange 24g protruding from the frame portion 24b in a direction away from the center line LC is provided on the fixing member 24. A hole 24h for achieving positioning relative to the layer 22 is provided on the flange 24g. Although not shown in the figure, a protrusion inserted into the hole 24h is provided on the surface of the layer 22 facing the Z1 direction. In addition, the center line LC is a straight line passing through the center PC and parallel to the Z axis. The center PC is the geometric center of the downstream chamber R2 when viewed from above. The flange 24g only needs to be provided as needed, and can also be omitted.

[0120] The filter 25 is a plate-shaped or sheet-shaped member that allows the ink to pass through and captures foreign matter mixed in the ink. The filter 25 is composed of, for example, metal fibers such as oblique woven or flat woven. In addition, the filter 25 is not limited to the structure using metal fibers, and may be composed of, for example, resin fibers such as non-woven fabrics.

[0121] The filter 25 is fixed to the frame portion 24b of the fixing member 24 described above, and as shown in FIG. Figure 8 As shown by the double-dashed line in FIG. 2 , the recess 24a is disposed in an area including the entire area. Figure 7 As shown, the filter chamber RF is divided into an upstream chamber R1 and a downstream chamber R2 by the filter 25. The upstream chamber R1 is a space located closer to the filter 25 in the Z1 direction and having the concave surface 21a as a part of the wall surface. The downstream chamber R2 is a space located closer to the filter 25 in the Z2 direction and having the side wall 24i and the concave portion 24a as a part of the wall surface.

[0122] The filter 25 is fixed to the fixing member 24 without using an adhesive. Therefore, the adhesive is prevented from adhering to the filter 25. Specifically, when the fixing member 24 is formed by insert molding with the filter 25 as an insert, the filter 25 and the fixing member 24 are fixed integrally. In this case, the fixing member 24 can be composed of either a thermosetting resin or a thermoplastic resin. When the fixing member 24 is composed of a thermoplastic resin, the filter 25 can also be fixed to the fixing member 24 by welding. In the present embodiment, since it is difficult to form the fixing member 24 by insert molding with the filter 25 as an insert as described above, it is preferred that the fixing member 24 is composed of a thermoplastic resin and the filter 25 is fixed to the fixing member 24 by welding.

[0123] As described above, the flow channel component 1 includes the supply flow channel CC, the filter 25, the fixing member 24, and the layer 22 as an example of the "first member". Here, as described above, ink as an example of the "liquid" flows in the supply flow channel CC. The filter 25 is arranged in the middle of the supply flow channel CC, and the ink passes through the filter 25. The fixing member 24 constitutes a part of the supply flow channel CC, and the filter 25 is fixed to the fixing member 24. The layer 22 constitutes a part of the supply flow channel CC, and the fixing member 24 is fixed to the layer 22.

[0124] In this way, if the filter 25 is fixed to the layer 22 via the fixing member 24 and no adhesive is used to fix the filter 25 to the fixing member 24, even if the adhesive B1 is used to fix the fixing member 24 to the layer 22, the adhesion of the adhesive to the filter 25 can be reduced.

[0125] The fixing member 24 is made of a thermoplastic resin. On the other hand, the layer 22 is made of any one of a thermosetting resin, a metal, and a ceramic.

[0126] Generally, the Young's modulus of each thermosetting resin, metal, and ceramic is higher than that of thermoplastic resin. Therefore, by making the flow channel component 1 include the layer 22 composed of any one of thermosetting resin, metal, and ceramic, the rigidity of the flow channel component 1 can be improved compared with the structure in which the flow channel component 1 is composed of only thermoplastic resin.

[0127] In addition, generally, thermosetting resins, metals, and ceramics each have a better liquid resistance than thermoplastic resins. Therefore, by making the flow channel component 1 include a layer 22 composed of any one of thermosetting resins, metals, and ceramics, the liquid resistance of the flow channel component 1 can be improved compared to a structure in which the flow channel component 1 is composed only of thermoplastic resins. In addition, generally, the linear expansion coefficients of thermosetting resins, metals, and ceramics are smaller than those of thermoplastic resins. Therefore, compared with the case of using thermoplastic resins, deformations such as warping of the flow channel component 1 caused by temperature changes can be reduced. As a result, peeling of the adhesive in the flow channel component 1 can be reduced.

[0128] On the other hand, thermoplastic resins can be fixed to other parts by welding. Therefore, the filter 25 can be fixed to the fixing member 24 by welding without using an adhesive. Here, there are types of thermoplastic resins that have excellent liquid resistance. Therefore, by appropriately selecting the type of thermoplastic resin constituting the fixing member 24, the liquid resistance required for the flow channel member 1 can also be achieved. In addition, the thermoplastic resin constituting the fixing member 24 itself may not have liquid resistance. In this case, for example, it is only necessary to appropriately apply a surface treatment such as a coating having liquid resistance to the fixing member 24.

[0129] As described above, it is possible to prevent the adhesive from adhering to the filter 25 while improving the rigidity and liquid resistance of the flow path component 1 , and as a result, it is possible to provide a flow path component 1 having higher reliability than the conventional technology.

[0130] In the present embodiment, the area of ​​the fixing part 24 when viewed from above is smaller than the area of ​​the layer 22 when viewed from above. Therefore, the rigidity of the fixing part 24 has a smaller influence on the rigidity of the flow channel part 1 as a whole than the rigidity of the layer 22. In other words, the rigidity of the layer 22 has a greater influence on the rigidity of the flow channel part 1 as a whole than the rigidity of the fixing part 24. Therefore, by forming the layer 22 from any one of a thermosetting resin, a metal, and a ceramic, the rigidity of the flow channel part 1 as a whole can be appropriately improved. On the other hand, it can be said that even if the fixing part 24 is formed from a thermoplastic resin, it is difficult to reduce the rigidity of the flow channel part 1 as a whole.

[0131] As described above, the fixing member 24 and the layer 22 are fixed to each other by the adhesive B1 as an example of the "first adhesive". In addition, the fixing member 24 and the filter 25 are fixed to each other by, for example, welding without using an adhesive. In this way, by fixing the filter 25 to the layer 22 via the fixing member 24 without using an adhesive during the fixing of the fixing member 24 and the filter, it is possible to suppress the adhesive B1 from clogging the mesh of the filter 25.

[0132] Here, although not particularly limited, the welding only needs to be able to fix the fixing member 24 and the filter 25 to each other, and examples thereof include heat welding, laser welding, and ultrasonic welding. In the present embodiment, heat welding is used to fix the fixing member 24 and the filter 25 to each other. In addition, when ultrasonic welding is used, the fixing member 24 needs to be formed of two thermoplastic resins arranged in a manner to clamp the filter 25. In addition, when laser welding is used, the fixing member 24 needs to be formed of a translucent resin and a light-absorbing resin composed of thermoplastic resins arranged in a manner to clamp the filter 25. The translucent resin used in laser welding is not limited to a resin that transmits 100% of the laser, and the light-absorbing resin used in laser welding is not limited to a resin that absorbs 100% of the laser. The light-absorbing resin and the translucent resin have different light absorption rates (or light transmittances) for at least one wavelength of the laser, and it is only necessary to make one side of the translucent resin easier to transmit than the light-absorbing resin. Therefore, the light absorption rate of the light absorbing resin may be less than 100%, and the light transmittance of the light transmissive resin may also be less than 100%. In addition, in order to stably perform laser welding, the laser transmittance of the light transmissive resin is preferably 20% or more, and more preferably 30% or more.

[0133] In addition, when the adhesive B1 is a light-curing adhesive, it is preferred that the fixing member 24 is a member having light transmittance. In this case, compared with the case where the adhesive B1 is a thermosetting adhesive, the time required for curing or curing of the adhesive B1 during bonding can be shortened. Therefore, the situation where the adhesive B1 flows toward the filter 25 during bonding can be reduced. In addition, by making the fixing member 24 light-transmissive, it is possible to irradiate the light for light curing to the adhesive B1 through the fixing member 24. Therefore, even if there is a portion where the adhesive B1 is arranged between the fixing member 24 and the layer 22, the portion can be light-cured. Here, the fixing member 24 only needs to have light transmittance that can cure the adhesive B1 when light is irradiated to the adhesive B1 through the fixing member 24. For example, when the adhesive B1 is an ultraviolet curing type, the fixing member 24 only needs to have light transmittance that can cure the adhesive B1 when ultraviolet rays are irradiated to the adhesive B1 through the fixing member 24. In addition, even when the adhesive B2 is a light-curing adhesive, the same effect as described above can be achieved.

[0134] Preferably, the adhesive B1 is not attached to the portion of the filter 25 that should perform the filtering function. In the present embodiment, the portion of the filter 25 that should perform the filtering function refers to the portion of the filter 25 that overlaps with the recess 24a when viewed from above. In the present embodiment, the adhesive B1 bonds the surface of the fixing member 24 facing the Z2 direction and the layer 22, and the filter 25 is fixed to the surface of the fixing member 24 facing the Z1 direction. Therefore, the adhesive B1 is not attached to the filter 25. In addition, since the frame 24b is inserted into the groove 21c as described above, the adhesives B2 and Ba are not attached to the filter 25. In this way, since no adhesive is attached to the filter 25, the possibility of the mesh of the filter 25 being clogged is extremely low.

[0135] As described above, the flow channel component 1 has the layer 21 as an example of the "second component". The layer 21 constitutes a part of the supply flow channel CC and is made of any one of a thermosetting resin, a metal, and a ceramic. The layers 21 and 22 are laminated with each other in a state where the fixing member 24 is interposed between the layers. Therefore, compared with a structure in which the fixing member 24 is not interposed between the layers 21 and 22, the rigidity of the flow channel component 1 can be improved.

[0136] As with the comparison with the layer 22 described above, when viewed from above, the area of ​​the fixing member 24 is smaller than the area of ​​the layer 21. Therefore, by forming the layer 21 from any one of a thermosetting resin, a metal, and a ceramic, it is possible to appropriately increase the rigidity of the entire flow path component 1. On the other hand, it can be said that even if the fixing member 24 is formed from a thermoplastic resin, it is difficult to reduce the rigidity of the entire flow path component 1.

[0137] As described above, the fixing member 24 and the layer 21 are fixed to each other by the adhesive B2 as an example of the "second adhesive". In this embodiment, since the adhesive B2 is used in addition to the adhesive B1, the fixing member 24 can be firmly fixed to the laminate including the layers 21 and 22, compared with the structure using only one of the adhesives B1 and B2.

[0138] In addition, as described above, the fixing member 24 has a recessed portion 24a that is recessed relative to the surface to which the filter 25 is fixed. The bottom surface of the recessed portion 24a constitutes a part of the supply flow channel CC, and has a first discharge port 24c and a second discharge port 24d as through holes. Therefore, the fixing member 24 constitutes the bottom wall of the downstream chamber R2. With this structure, the distance between the filter 25 and the first discharge port 24c and the second discharge port 24d can be shortened compared to a structure in which the fixing member 24 does not have the recessed portion 24a. As a result, the bubbles in the downstream chamber R2 can be appropriately discharged to the first discharge port 24c and the second discharge port 24d.

[0139] As described above, the supply flow channel CC has the flow channel C3 extending in the direction intersecting with the direction in which the layer 22 and the filter 25 are laminated. The flow channel C3 is provided in the layer 22. Since the layer 22 provided with the flow channel C3 in this way is enlarged in the direction intersecting with the direction in which the layer 22 and the filter 25 are laminated and the ratio of the wall-removed portion in the layer 22 is high, when the layer 22 is composed of a thermoplastic resin, the rigidity is likely to be insufficient. In contrast, by forming the layer 22 with any one of a thermosetting resin, a metal, and a ceramic, the rigidity of the layer 22 can be prevented from being insufficient even if the flow channel C3 is provided in the layer 22. In addition, since the liquid contact area of ​​the layer 22 in contact with the ink is increased when the layer 22 has the flow channel C3, when the layer 22 is composed of a thermoplastic resin having a lower liquid resistance than a thermosetting resin, a metal, and a ceramic, the layer 22 is likely to deteriorate, and foreign matter may be generated or swelling may occur. On the other hand, by forming the layer 22 from any one of a thermosetting resin, a metal, and a ceramic, even if the flow channel C3 is provided in the layer 22 , it is possible to prevent the layer 22 from being deteriorated.

[0140] In general, thermosetting resins, metals, and ceramics each have excellent resistance not only to water-based inks but also to solvent inks and ultraviolet curing inks. When the ink flowing in the supply flow channel CC is ultraviolet curing ink or solvent ink, since the ink contains a solvent, when it is assumed that the flow channel component 1 is composed only of thermoplastic resin, the flow channel component 1 is easily degraded by the solvent. In contrast, by forming at least a portion of the flow channel component 1 from any one of thermosetting resin, metal, and ceramic, even if solvent ink or ultraviolet curing ink is used as the liquid ejected from the liquid ejection head 10, the flow channel component 1 is less likely to be degraded by the solvent ink or ultraviolet curing ink.

[0141] As described above, the liquid jet head 10 has a circulation flow channel for the ink that has not been ejected from the nozzle N after passing through the supply flow channel CC. Here, at least a part of the discharge flow channel CM constituting a part of the circulation flow channel is provided in the layer 22. Therefore, the layer 22 constitutes a part of the circulation flow channel. Since the layer 22 provided with a part of the circulation flow channel in this way is enlarged in the direction intersecting with the direction in which the layer 22 and the filter 25 are laminated and the proportion of the wall-removed part in the layer 22 is high, when it is assumed that the layer 22 is composed of a thermoplastic resin, it is easy to have insufficient rigidity. In contrast, by constituting the layer 22 with any one of a thermosetting resin, a metal and a ceramic, even if a part of the circulation flow channel is provided in the layer 22, it is possible to prevent the layer 22 from having insufficient rigidity. In addition, since the liquid contact area of ​​the layer 22 in contact with the ink increases when the layer 22 has a part of the circulation flow channel, it is easy to deteriorate the layer 22 when it is assumed that the layer 22 is composed of a thermoplastic resin. On the other hand, by forming the layer 22 from any one of a thermosetting resin, a metal, and a ceramic, even if a part of the circulation flow path is provided in the layer 22 , it is possible to prevent the layer 22 from being deteriorated.

[0142] In addition, the liquid resistance of various materials such as thermoplastic resins, thermosetting resins, metals, and ceramics can be measured experimentally. Specifically, by immersing a component such as a film of a certain mass as a test piece in the target ink for a certain period of time, and calculating the dissolution ratio based on the mass change at this time, the liquid resistance can be quantitatively evaluated. Through the above method, for example, the resistance of each material to a specific solvent-based ink, UV-curable ink, or water-based ink can be measured.

[0143] 1-6. Method for manufacturing flow channel component 1

[0144] Fig.10 1 is a diagram showing a manufacturing process of the flow channel component 1 according to the first embodiment. Fig.10, the manufacturing process of the flow channel component 1 is shown in the figure when the fixing component 24 and the filter 25 are fixed by welding. Fig.10 As shown, the method for manufacturing the flow channel component 1 includes a preparation step S11, a welding step S12, and a bonding step S13, and these steps are performed in this order.

[0145] In the preparation step S11, the fixing member 24 and the filter 25 are prepared. The fixing member 24 is formed by injection molding a thermoplastic resin. The fixing member 24 has a guide 24s protruding from the mounting surface 24p. Although not shown in the figure, the guide 24s is provided in an annular shape so as to surround the recess 24a when viewed in the direction in which the filter 25 and the fixing member 24 are laminated. The filter 25 is obtained by appropriately cutting metal fibers such as oblique lap weave or flat lap weave.

[0146] In the welding step S12, the fixing member 24 and the filter 25 are fixed to each other by welding. Fig.12 As shown, after the filter 25 is placed on the guide 24s of the fixing member 24, the energy EG is applied to the fixing member 24 in this state over the range in contact with the outer periphery of the filter 25, in other words, the energy EG is applied to the guide 24s, so that the guide 24s is melted, thereby the fixing member 24 and the filter 25 are mutually welded together. Since the welding method in this embodiment is thermal welding, the energy EG is heat.

[0147] In the bonding step S13 , the fixing member 24 and the layer 22 are fixed to each other by the adhesive B1 .

[0148] As described above, the method for manufacturing the flow path component 1 is to weld the filter 25 and the fixing component 24 and then bond the fixing component 24 and the layer 22 with the adhesive B1. In the above method for manufacturing the flow path component 1, the flow path component 1 having excellent reliability as described above can be manufactured.

[0149] Although in the first embodiment, layer 22 is set as an example of the “first component”, layer 21 is set as an example of the “second component”, adhesive B1 is set as an example of the “first adhesive”, and adhesive B2 is set as an example of the “second adhesive”, layer 22 may be set as an example of the “second component”, layer 21 may be set as an example of the “first component”, adhesive B1 may be set as an example of the “second adhesive”, and adhesive B2 may be set as an example of the “first adhesive”.

[0150] 2. Second Implementation

[0151] In the following exemplary embodiments, the same reference numerals as those in the first embodiment are used for elements having the same functions or effects as those in the first embodiment, and detailed descriptions thereof are appropriately omitted.

[0152] Fig.11 FIG. 4 is a perspective view of a liquid ejection module 40A having a liquid ejection head 10A according to the second embodiment. Fig.11 As shown in FIG. 1 , the liquid ejection module 40A includes a support body 41A and a plurality of liquid ejection heads 10A. The support body 41A is a component for supporting the plurality of liquid ejection heads 10A. Fig.11 In the example shown, the support body 41A is a plate-shaped member made of metal or the like, and is provided with a plurality of mounting holes 41b for mounting a plurality of liquid ejecting heads 10A. A liquid ejecting head 10A is inserted into each mounting hole 41b, and each liquid ejecting head 10A is fixed to the support body 41A by screw fastening or the like. Fig.11 In the embodiment, the plurality of liquid ejecting heads 10A are arranged in rows and columns along the X-axis and the Y-axis. In addition, the number of liquid ejecting heads 10A in the liquid ejecting module 40A is not limited to Fig.11 The shape of the support body 41A is not limited to the example shown. Fig.11 The examples shown are not examples, but rather any arbitrary shapes.

[0153] Fig.12 for Fig.11 The exploded perspective view of the liquid ejecting head 10A is shown in FIG. Fig.12 As shown, the liquid jet head 10A includes a flow channel structure 11A, a wiring substrate 12A, a bracket 13A, a head body 14_1, 14_2, 14_3 and 14_4, a fixing plate 15A, a reinforcing plate 17 and a cover 18. These components are arranged in the order of the cover 18, the wiring substrate 12A, the flow channel structure 11A, the bracket 13A, the head body 14_1, 14_2, 14_3 and 14_4, the reinforcing plate 17 and the fixing plate 15A facing the Z2 direction. Hereinafter, each part of the liquid jet head 10A will be described in sequence.

[0154] The flow channel structure 11A is constructed in the same manner as the flow channel structure 11 of the first embodiment described above, except that it is constructed by laminating layers Su1 to Su5 and has a different shape. Therefore, the flow channel structure 11A has a structure related to the filter in the same manner as the flow channel structure 11. This structure will be described in detail later. In addition, the layers Su1 to Su5 are composed of any one of a thermosetting resin, a metal, and a ceramic. The layers Su1 to Su5 are fixed to each other by an adhesive. Layer Su3 is an example of a "first component". Layer Su2 is an example of a "second component".

[0155] The wiring substrate 12A is a mounting component for electrically connecting the head bodies 14_1, 14_2, 14_3 and 14_4 to the control unit 20. The wiring substrate 12A is composed of, for example, a flexible wiring substrate or a rigid wiring substrate. The wiring substrate 12A is arranged between the flow channel structure 11A and the cover 18, and a connector 12c is provided on the surface of the wiring substrate 12A and the surface opposite to the flow channel structure 11A. The connector 12c is a connecting component for electrically connecting to the control unit 20. In addition, the wiring substrate 12A is electrically connected to the plurality of head bodies 14 via wiring not shown in the figure. The wiring is composed of, for example, a combination of a flexible wiring substrate and a rigid wiring substrate. In addition, the wiring can also be integrally formed with the wiring substrate 12A.

[0156] The bracket 13A is the same as the bracket 13 of the first embodiment described above except for the difference in shape. Here, the head bodies 14_1, 14_2, 14_3, and 14_4 are held on the bracket 13A in a state where the arrangement direction of the nozzles N in the nozzle arrays La and Lb is parallel to the Y axis. The fixing plate 15A is the same as the fixing plate 15 of the first embodiment described above except for the difference in shape. However, a reinforcing plate 17 is arranged between the bracket 13A and the fixing plate 15A. In addition, Fig.12 , a structure in which the stent 13A does not have a branch flow channel is shown.

[0157] The reinforcing plate 17 is a plate-shaped member that reinforces the fixing plate 15A. The reinforcing plate 17 is arranged on the fixing plate 15A in an overlapping manner and is fixed to the fixing plate 15A by an adhesive. A plurality of openings 17a are provided on the reinforcing plate 17, and the plurality of head main bodies 14 are arranged in the plurality of openings 17a. The reinforcing plate 17 is made of, for example, a metal material.

[0158] The cover 18 is a box-shaped member that accommodates the flow channel component 1A and the wiring substrate 12A of the flow channel structure 11A. The cover 18 is made of, for example, a resin material. Four through holes 18a and an opening 18b are provided on the cover 18. The four through holes 18a correspond to the four connecting tubes of the flow channel structure 11A, and the corresponding connecting tubes 11a, 11b, 11c or 11d are passed through each through hole 18a. In the opening 18b, the connector 12c passes from the inside of the cover 18 to the outside.

[0159] Fig.13 1A is a diagram showing a flow channel of a flow channel component 1A according to a second embodiment. Fig.13 As shown, a supply flow channel Sa, a discharge flow channel Da, a supply flow channel Sb, and a discharge flow channel Db are provided inside the flow channel component 1A. The supply flow channel Sa is a flow channel extending from the connecting tube 11a to the liquid storage chamber Ra of each head body 14. The discharge flow channel Da is a flow channel extending from the liquid storage chamber Ra of each head body 14 to the connecting tube 11b. The supply flow channel Sb is a flow channel extending from the connecting tube 11c to the liquid storage chamber Rb of each head body 14. The discharge flow channel Db is a flow channel extending from the liquid storage chamber Rb of each head body 14 to the connecting tube 11d. These flow channels are constituted by grooves and through holes appropriately provided on the layers Su1 to Su5 described above.

[0160] like Fig.13 As shown, four filter units Fa_1 to Fa_4 are provided in the supply flow path Sa. Similarly, four filter units Fb_1 to Fb_4 are provided in the supply flow path Sb. Hereinafter, the filter unit Fa_1 will be described as a representative. In addition, the filter units Fa_2 to Fa_4 are configured in the same manner as the filter unit Fa_1.

[0161] Fig.14 2 is a cross-sectional view of a flow channel component 1A according to the second embodiment. Fig.14 , the filter portion Fa_1 is shown to be disposed between the layer Su2 and the layer Su3. Fig.14 As shown, the filter portion Fa_1 includes a filter chamber RF, a fixing member 24A, and a filter 25A.

[0162] In this embodiment, the filter chamber RF is constituted by the recessed portion 26a provided on the surface of the layer Su2 facing the Z2 direction, and the recessed portions 27a and 27b provided on the surface of the layer Su3 facing the Z1 direction. Fig.14 In the example shown, the recess 27a is provided so as to coincide with the recess 26a in a plan view. The recess 27b is provided on the bottom surface of the recess 27a and so as to extend inwardly from the recess 26a in a plan view.

[0163] The fixing member 24A and the filter 25A are arranged in the filter chamber RF, and the filter chamber RF is divided into an upstream chamber R1 and a downstream chamber R2. Here, the upstream chamber R1 is connected to the connecting pipe 11a described above via the flow channel Pa1. Although not shown in the figure, the flow channel Pa1 is composed of grooves respectively provided on the surface of the layer Su2 facing the Z2 direction and the surface of the layer Su3 facing the Z1 direction. On the other hand, the downstream chamber R2 is connected to the head body 14 via the flow channel Pa2. The flow channel Pa2 is composed of a hole 27c that opens on the bottom surface of the recess 27b and penetrates the layer Su3.

[0164] The fixing member 24A is the same as the fixing member 24 of the first embodiment described above except that the shape is different. Similarly, the filter 25A is the same as the filter 25 of the first embodiment described above except that the shape is different. Hereinafter, the fixing member 24A and the filter 25A will be described with the focus on the differences from the fixing member 24 and the filter 25.

[0165] Fig.15 It is a top view of the fixing member 24A in the second embodiment. Fig.16 This is an enlarged cross-sectional view for explaining a fixed state of a fixing member 24A and a filter 25A in the second embodiment.

[0166] like Fig.15 As shown, the fixing member 24A is frame-shaped when viewed from above. Fig.15 In the example shown, the outer periphery and the inner periphery of the fixing member 24A are respectively substantially quadrilateral. In addition, the filter 25A is quadrilateral when viewed from above. Moreover, the outer periphery of the filter 25A is fixed to one surface of the fixing member 24A by welding without using an adhesive.

[0167] like Fig.16 As shown in FIG. 2 , a structure composed of a fixing member 24A and a filter 25A is arranged in a recess 27a. Here, the surface of the fixing member 24A to which the filter 25A is fixed is fixed to the layer Su3 by the adhesive B1. Therefore, the inner peripheral surface 24j of the fixing member 24A constitutes a part of the wall surface of the upstream chamber R1. In addition, by fixing the surface of the fixing member 24A to which the filter 25A is fixed to the layer Su3 by the adhesive B1, the distance between the filter 25A and the flow channel Pa2 can be shortened. As a result, the bubbles in the downstream chamber R2 can be properly discharged to the flow channel Pa2.

[0168] Here, the adhesive B1 is attached not only to the fixing member 24A and the layer Su3, but also to the welded portion of the filter 25A that does not have a filter function, that is, the outer peripheral portion. Fig.16 As shown, the coated area T of the filter 25A indicates the portion where the guide of the fixing component 24A melts by welding and blocks the mesh of the filter 25A. That is, in the portion of the filter 25A that is closer to the inside than the area T and has a filtering function, and in the portion of the filter 25A that is closer to the periphery than the area T, there is no resin of the fixing component 24A that has melted during welding. Therefore, by attaching the adhesive B1 between the portion of the filter 25A that is closer to the periphery than the area T and the recessed portion 27a, the adhesive force achieved by the adhesive B1 is improved by utilizing the anchoring effect brought about by the recesses and protrusions of the filter 25A. Furthermore, the adhesive B1 is not attached to the portion that is closer to the center of the filter 25A than the area T when viewed from above. Therefore, by causing the adhesive B1 to flow out to the portion of the filter 25A that has a filtering function due to capillary force, the clogging of the mesh of the filter 25A can be reduced. Although in Fig.16 In the figure, the adhesive B1 is attached between the area T of the filter 25A and the bottom surface of the recess 27a, and at the peripheral portion of the filter 25A compared to the area T. However, the adhesive B1 may be attached not between the area T of the filter 25A and the bottom surface of the recess 27a, but at the peripheral portion of the filter 25A compared to the area T.

[0169] Through the above second embodiment, it is possible to provide a flow channel component 1A with excellent reliability in the same manner as the first embodiment described above. In addition, in this embodiment, as described above, the fixing component 24A is a frame-shaped component along the outer periphery of the filter 25A. Therefore, the fixing component 24A can reduce the area in contact with the ink compared to the fixing component 24 of the first embodiment described above. Therefore, even in the case where the fixing component 24A is formed of a thermoplastic resin in order to fix the fixing component 24A and the filter 25 by welding, it is possible to suppress the deterioration and swelling of the fixing component 24A caused by contact with solvent-based ink or ultraviolet curing ink.

[0170] In addition, although the fixing member 24A has one opening based on the inner peripheral surface 24j, it may also have a plurality of openings. In other words, the fixing member 24A may have a beam-shaped portion for bridging the portion in addition to the portion along the outer periphery of the filter 25A, and in this case, it may also be said to be a frame-shaped member. In addition, in this case, a plurality of filters may also be provided for each opening.

[0171] In addition, if Fig.13As shown, the supply channels Sa and Sb mentioned above each have a branch channel branching out. When the branch channel is provided in layer Su3, since layer Su3 is enlarged and the proportion of the wall-removed portion is high, when it is assumed that layer Su3 is composed of a thermoplastic resin, insufficient rigidity is likely to occur. In contrast, by forming layer Su3 from any one of a thermosetting resin, a metal, and a ceramic, insufficient rigidity of layer Su3 can be prevented even if a portion of the branch channel is provided in layer Su3. Furthermore, since the liquid contact area of ​​layer Su3 in contact with ink increases when layer Su3 has a branch channel, when it is assumed that layer Su3 is composed of a thermoplastic resin, layer Su3 is likely to deteriorate. In contrast, by forming layer Su3 from any one of a thermosetting resin, a metal, and a ceramic, deterioration of layer Su3 can be prevented even if a branch channel is provided in layer Su3.

[0172] According to the second embodiment described above, the reliability of the flow path member 1A can be improved in the same manner as in the first embodiment described above.

[0173] 3. Third Implementation

[0174] In the following exemplary embodiments, elements having the same functions or effects as those of the first embodiment are denoted by the same reference numerals as those used in the first embodiment, and detailed descriptions thereof are appropriately omitted.

[0175] Fig.17 2 is a cross-sectional view of a flow channel component 1B according to the third embodiment. The flow channel component 1B is the same as the flow channel component 1A according to the second embodiment described above, except that the installation posture of the structure composed of the fixing component 24A and the filter 25A is reversed. That is, in the flow channel component 1B, the surface of the fixing component 24A, which is opposite to the surface to which the filter 25A is fixed, is fixed to the layer Su3 by the adhesive B1.

[0176] The third embodiment described above can also improve the reliability of the flow channel component 1B in the same manner as the first embodiment described above. In addition, in this embodiment, since the surface of the fixing component 24A, which is the opposite side to the surface to which the filter 25A is fixed, is fixed to the layer Su3 by the adhesive B1, the adhesive B1 is less likely to adhere to the filter 25A than in the second embodiment.

[0177] In addition, although Fig.17In order to improve the bonding strength, the adhesive B1 is provided between the surface of the fixing member 24A opposite to the surface to which the filter 25A is fixed and the bottom surface of the recess 27a, and between the outer peripheral surface of the fixing member 24A and the inner peripheral surface of the recess 27a, but the present invention is not limited to this mode, and the adhesive B1 may be provided only between the surface of the fixing member 24A opposite to the surface to which the filter 25A is fixed and the bottom surface of the recess 27a. If such a structure is adopted, there is an advantage that the adhesive B1 is difficult to adhere to the filter 25A compared with the second embodiment.

[0178] 4. Fourth Implementation

[0179] In the following exemplary embodiments, elements having the same functions or effects as those of the first embodiment are denoted by the same reference numerals as those used in the first embodiment, and detailed descriptions thereof are appropriately omitted.

[0180] Fig.18 It is a cross-sectional view of the flow channel component 1C involved in the fourth embodiment. The flow channel component 1C is the same as the flow channel component 1B of the third embodiment described above, except that a recess 27d is provided on the layer Su3. The recess 27d is provided on the bottom surface of the recess 27a along the inner circumference of the recess 27b. The recess 27d has an annular shape when viewed from above, and has a bottom surface 27d-1, a first inner circumferential surface 27d-2 and a second inner circumferential surface 27d-3. The first inner circumferential surface 27d-2 is the inner circumferential surface of the recess 27d that is arranged closer to the center of the recess 27a than the second inner circumferential surface 27d-3. Here, the end edge of the fixing component 24A in the Z2 direction is accommodated in the recess 27d, and the fixing component 24A is fixed to the wall surface of the recess 27d by the adhesive B1. Specifically, the adhesive B1 is provided between the surface of the fixing component 24A opposite to the surface on which the filter 25A is fixed and the bottom surface 27d-1, between the outer peripheral surface of the fixing component 24A and the second inner peripheral surface 27d-3, and between the inner peripheral surface of the fixing component 24A and the first inner peripheral surface 27d-2.

[0181] The fourth embodiment described above can also improve the reliability of the flow channel component 1C in the same manner as the first embodiment described above. In addition, in this embodiment, by setting the fixing component 24A in the recess 27d, the distance between the filter 25A and the flow channel Pa2 can be shortened. As a result, the bubbles in the downstream chamber R2 can be properly discharged to the flow channel Pa2. In addition, in this embodiment, since the area where the adhesive B1 is provided is increased, the bonding strength between the fixing component 24A and the layer Su3 can be improved.

[0182] 5. Fifth Implementation

[0183] In the following exemplary embodiments, elements having the same functions or effects as those of the first embodiment are denoted by the same reference numerals as those used in the first embodiment, and detailed descriptions thereof are appropriately omitted.

[0184] Fig.19 2 is a cross-sectional view of a flow path component 1D according to the fifth embodiment. The flow path component 1D is the same as the flow path component 1B according to the third embodiment described above, except that a fixing member 24D is provided instead of the fixing member 24A.

[0185] The fixing member 24D is the same as the fixing member 24A of the first embodiment described above except that it has a recessed portion 24k for installing the filter 25A. The recessed portion 24k is provided on the surface of the fixing member 24D facing the Z1 direction and accommodates the filter 25A.

[0186] The fifth embodiment described above can also improve the reliability of the flow channel component 1D in the same manner as the third embodiment described above. In addition, in this embodiment, by setting the filter 25A in the recess 24k, the distance between the filter 25A and the flow channel Pa2 can be shortened. As a result, the bubbles in the downstream chamber R2 can be appropriately discharged to the flow channel Pa2.

[0187] 6. Sixth Implementation

[0188] In the following exemplary embodiments, elements having the same functions or effects as those of the first embodiment are denoted by the same reference numerals as those used in the first embodiment, and detailed descriptions thereof are appropriately omitted.

[0189] Fig. 20 2 is a cross-sectional view of a flow path component 1E according to the sixth embodiment. The flow path component 1E is the same as the flow path component 1A according to the second embodiment described above, except that the flow path component 1E includes a fixing member 24E instead of the fixing member 24A.

[0190] The fixing member 24E is the same as the fixing member 24A of the second embodiment described above, except that the filter 25A is fixed midway in the thickness direction of the fixing member 24E. The fixing member 24E is formed by insert molding using the filter 25A as an insert, and is integrated with the filter 25A.

[0191] As described above, in the flow channel component 1E, the fixing component 24E is formed by insert molding using the filter 25A as an insert. That is, the fixing component 24E and the filter 25A are formed as one body by insert molding. Therefore, the fixing component 24E and the filter 25A can be fixed to each other without using an adhesive. In addition, the layer Su3 as an example of the "first component" and the fixing component 24E are fixed to each other by the adhesive B1.

[0192] Fig.21 1 is a diagram showing a manufacturing process of the flow channel component 1E according to the sixth embodiment. Fig.21 , the manufacturing process of the flow path component 1E is shown in the figure when the fixing component 24E and the filter 25A are fixed by insert molding. Fig.21 As shown, the method for manufacturing the flow channel component 1E includes an inserting step S21, a molding step S22, a mold separation step S23, and a bonding step S24, and these steps are performed in this order.

[0193] In the inserting step S21 , the filter 25A is inserted as an insert at a desired position in the mold with the molding dies 301 and 302 opened.

[0194] In the forming process S22, the mold is filled with resin while the forming molds 301 and 302 are closed. Although the resin may be any of a thermoplastic resin and a thermosetting resin, a thermosetting resin is more preferably used from the viewpoint of liquid resistance and rigidity. In the case where the resin is a thermoplastic resin, the thermoplastic resin softened by heating is filled into the mold, and then the thermoplastic resin is solidified by cooling, thereby obtaining a fixing part 24E to which the filter 25A is fixed. In addition, in the case where the resin is a thermosetting resin, the mold is filled with a thermosetting resin having fluidity before solidification, and then the thermosetting resin is solidified by a curing reaction, thereby obtaining a fixing part 24E to which the filter 25A is fixed.

[0195] In the mold separation step S23 , the fixing member 24E obtained as described above is released from the molding dies 301 and 302 .

[0196] In the bonding step S24 , similarly to the bonding step S13 of the above-described first embodiment, the fixing member 24E and the layer Su3 are fixed to each other by the adhesive B1 .

[0197] As described above, the method for manufacturing the flow channel component 1E is to form the fixing component 24E by insert molding using the filter 25A as an insert, and then bond the fixing component 24E and the layer Su3 by the adhesive B1. In the above method for manufacturing the flow channel component 1E, the flow channel component 1E having excellent reliability as described above can be manufactured. In addition, when the fixing component 24E is formed of a thermosetting resin, the liquid resistance and rigidity can be improved compared to the case where the fixing component 24E is formed of a thermoplastic resin.

[0198] The sixth embodiment described above can also improve the reliability of the flow path component 1E in the same manner as the first embodiment described above. In addition, in this embodiment, by fixing the filter 25A at a midway point in the thickness direction of the fixing component 24E, the distance between the filter 25A and the flow path Pa2 can be shortened. As a result, the bubbles in the downstream chamber R2 can be appropriately discharged to the flow path Pa2.

[0199] 7. Modifications

[0200] The above-described methods can be modified in various ways. In the following, specific modified methods that can be applied to the above-described methods are illustrated. Two or more methods arbitrarily selected from the following examples can be appropriately combined within the scope of non-contradiction.

[0201] 7-1. Modification 1

[0202] Fig. 22 1 is a cross-sectional view of a flow channel component 1F according to Modification 1. The flow channel component 1F includes a layer 21F as an example of a "fixed component", a layer 22F as an example of a "first component", and a filter 25F. The layers 21F and 22F are laminated in the Z2 direction in this order, and the layers are fixed to each other by an adhesive. Here, when viewed from above, the area of ​​the layer 21F is smaller than the area of ​​the layer 22F. In addition, the layer 21F is made of a thermoplastic resin, and the layer 22F is made of a thermosetting resin, a metal, or a ceramic.

[0203] A filter 25F is arranged in a space formed between the layer 21F and the layer 22F. The filter chamber RF is composed of a recessed portion 21d provided on the surface of the layer 21F facing the Z2 direction and a recessed portion 22e provided on the surface of the layer 22F facing the Z1 direction. The filter 25F is arranged in the recessed portion 21d, and the filter 25F is fixed to the layer 21F by welding or the like without using an adhesive.

[0204] Here, the filter 25F divides the filter chamber RF into an upstream chamber R1 and a downstream chamber R2. A connecting pipe 11a is provided in the layer 21F, and the connecting pipe 11a is connected to the upstream chamber R1. In addition, a discharge port 22f opening to the downstream chamber R2 is provided on the layer 22F. Through the above modification 1, the same effect as the embodiment described above is obtained. In addition, it is also possible to have a structure in which the recess 22e is not formed on the layer 22F and only the discharge hole 22f is formed.

[0205] In addition, as described above, since the area of ​​layer 21F is smaller than the area of ​​layer 22F when viewed from above, even if layer 21F is formed of a thermoplastic resin, the decrease in the rigidity of the entire flow channel component 1F can be reduced. In addition, layer 22F may be a structure in which not only layer 21F having connection tube 11a is formed, but also a plurality of layers 21F having connection tubes 11b to 11d are laminated together using an adhesive. Even in such a structure, if layer 22F having a larger area than each layer 21F when viewed from above is formed of a thermosetting resin, the decrease in the rigidity of the flow channel component 1F can be suppressed. In addition, when viewed from above, the area of ​​layer 21F may be substantially the same as the area of ​​layer 22F. The area of ​​layer 21F being substantially the same as the area of ​​layer 22F includes the case where the area of ​​layer 21F is 90% or more and less than 110% of the area of ​​layer 22F.

[0206] 7-2. Modification 2

[0207] Fig.23 : is a cross-sectional view of the flow channel component 1G involved in the modification example 2. The flow channel component 1G is the same as the flow channel component 1F of the modification example 1 described above, except that the layer 22F is replaced by the layer 22G and the layer 23G and the filter 25F is set at a different position. That is, the flow channel component 1G has a layer 21F as an example of a "first component", a layer 22G as an example of a "fixed component", a layer 23G as an example of a "second component", and a filter 25F. In addition, the layer 21F is also an example of a "second component", and in that case, the layer 23G is an example of a "first component". The layers 21F, 22G and 23G are laminated in the Z2 direction in this order, and these layers are fixed to each other by an adhesive. The layers 21F and 23G are respectively composed of a thermosetting resin, a metal or a ceramic, and the layer 22G is composed of a thermoplastic resin.

[0208] A filter 25F is arranged in a space formed between the layer 21F and the layer 22G. The filter chamber RF is composed of a recess 21d provided on the surface of the layer 21F facing the Z2 direction, an opening 22g penetrating the layer 22G, and a surface of the layer 23G facing the Z1 direction. The filter 25F is arranged in the opening 22g, and the filter 25F is fixed to the layer 22G by welding or the like without using an adhesive.

[0209] Here, the filter 25F divides the filter chamber RF into an upstream chamber R1 and a downstream chamber R2. A connecting pipe 11a is provided in the layer 21F, and the connecting pipe 11a is connected to the upstream chamber R1. In addition, a discharge port 23b opening to the downstream chamber R2 is provided on the layer 23G. Through the above modification example 2, the same effect as the embodiment described above can also be obtained.

[0210] 7-3. Modification 3

[0211] Fig.24 2 is a cross-sectional view of a flow channel component 1H according to Modification 3. The flow channel component 1H is the same as the flow channel component 1F according to Modification 1 described above, except that the filter 25F is fixed to the layer 21F via the fixing member 24H. That is, the flow channel component 1H includes the layer 21F as an example of the "first member", the layer 22F as an example of the "second member", the fixing member 24H, and the filter 25F.

[0212] Here, the fixing member 24H is made of thermoplastic resin and is frame-shaped. The fixing member 24H is fixed to the layer 21F by an adhesive not shown. In addition, the filter 25F is fixed to the fixing member 24H by welding or the like without using an adhesive. The above modification example 3 can also obtain the same effect as the above-mentioned embodiment. In addition, in the case where the fixing member 24H is sandwiched in the filter 25F and is integrally insert-molded relative to the filter 25F as in the sixth embodiment described above, the fixing member 24H can also be made of a thermosetting resin.

[0213] 7-4. Modification 4

[0214] Fig.25 : is a cross-sectional view of a flow channel component 1I involved in Modification 4. The flow channel component 1I includes a layer 21H as an example of a "second component", a layer 22F as an example of a "first component", a fixing component 24H, and a filter 25F. The layers 21H and 22F are laminated in this order in the Z2 direction, and these layers are fixed to each other by an adhesive. Here, the layers 21H and 22F are respectively composed of a thermosetting resin, a metal, or a ceramic.

[0215] A filter 25F is disposed in a space formed between the layer 21H and the layer 22F. The filter chamber RF is composed of a recess 21d disposed on the surface of the layer 21H facing the Z2 direction and a recess 22e disposed on the surface of the layer 22F facing the Z1 direction. A fixing member 24H and a filter 25F are disposed in the recess 22e, and the filter 25F is fixed to the layer 22F via the fixing member 24H.

[0216] In this modification, the fixing member 24H is formed by laminating two members 24m and 24n. Here, both members 24m and 24n are formed of thermoplastic resin. Members 24m and 24n are bonded to each other by laser welding or ultrasonic welding, and are bonded to the filter 25F. In the case of laser welding, one of members 24m and 24n is made of a light-transmitting resin, and the other is made of a light-absorbing resin. The above modification 4 can also achieve the same effect as the above-described embodiment.

[0217] 7-5. Modification 5

[0218] In the above-described embodiment, a line head is constructed by arranging a plurality of liquid ejecting heads 10 along the X axis. However, the present invention is not limited to this structure, and a serial structure in which the liquid ejecting heads 10 are reciprocated along the X axis may be used.

[0219] 7-6. Modification 6

[0220] The liquid ejection device 100 illustrated in the above-mentioned various modes can be used in various devices such as fax machines or copiers in addition to devices dedicated to printing. Originally, the use of the liquid ejection device of the present invention is not limited to printing. For example, a liquid ejection device that ejects a solution of a color material can be used as a manufacturing device for forming a color filter of a liquid crystal display device. In addition, a liquid ejection device that ejects a solution of a conductive material can be used as a manufacturing device for forming wiring and electrodes of a wiring substrate.

[0221] Explanation of symbols

[0222] 1…flow channel component; 1A…flow channel component; 1B…flow channel component; 1C…flow channel component; 1D…flow channel component; 1E…flow channel component; 1F…flow channel component; 1G…flow channel component; 1H…flow channel component; 10…liquid ejection head; 10A…liquid ejection head; 21…layer; 21F…layer; 21H…layer; 21d…recess; 22…layer; 22F…layer; 22G…layer; 22a…recess; 22e…recess; 23…layer; 23G…layer; 24…fixed component; 24A…fixed component; 24D…fixed component; 24E…fixed component; 24H…fixed component; 24a…recess ; 24k…recess; 25…filter; 25A…filter; 25F…filter; 26a…recess; 27a…recess; 27b…recess; 27c…hole; 27d…recess; 30…conveying mechanism; 100…liquid ejecting device; 101…medium; B1…adhesive; B2…adhesive; CC…supply channel; CM…discharge channel (circulating channel); Da…discharge channel (circulating channel); Db…discharge channel (circulating channel); N…nozzle; Sa…supply channel; Sb…supply channel; Su1…layer; Su2…layer; Su3…layer; Su4…layer; Su5…layer.

Claims

1. A flow channel component, comprising: a supply channel for the flow of liquid; a filter disposed midway along the supply flow channel and allowing the liquid to pass therethrough; a fixing member constituting a part of the supply flow channel and fixing the filter; a first member constituting a part of the supply flow channel and to which the fixing member is fixed, The fixing member is made of thermoplastic resin. The first component is made of any one of a thermosetting resin, a metal and a ceramic. In a plan view, an area of ​​the fixing member is smaller than an area of ​​the first member.

2. The flow channel component according to claim 1, wherein: The fixing member and the filter are fixed to each other by welding. The fixing member and the first member are fixed to each other by a first adhesive.

3. The flow channel component according to claim 2, wherein: The fixing member is a light-transmitting member. The first adhesive is a light-curing adhesive.

4. The flow channel component according to claim 1, wherein: No adhesive is attached to the filter.

5. The flow channel component according to claim 1, wherein: A second member is provided, the second member constituting a part of the supply flow path and being made of any one of a thermosetting resin, a metal and a ceramic, The first member and the second member are laminated on each other in a state where the fixing member is interposed between the first member and the second member.

6. The flow channel component according to claim 5, wherein: In a plan view, an area of ​​the fixing member is smaller than an area of ​​the second member.

7. The flow channel component according to claim 5 or 6, wherein: The fixing member and the second member are fixed to each other by a second adhesive.

8. The flow channel component according to claim 1, wherein: The fixing component is a frame-shaped component.

9. The flow channel component according to claim 1, wherein: The fixing member has a recessed portion that is recessed relative to the surface to which the filter is fixed. The bottom surface of the recessed portion constitutes a part of the supply flow path and has a through hole.

10. The flow channel component according to claim 1, wherein: The supply flow path has a flow path extending in a direction intersecting with a direction in which the first member and the filter are laminated. The flow channel is arranged on the first component.

11. The flow channel component according to claim 1, wherein: The supply flow channel has a branch flow channel branching out, The branch flow channel is provided on the first component.

12. A flow channel component, comprising: a supply channel for the flow of liquid; a filter disposed midway along the supply flow channel and allowing the liquid to pass therethrough; a fixing member constituting a part of the supply flow channel and made of a thermosetting resin; a first member constituting a part of the supply flow path and being made of any one of a thermosetting resin, a metal and a ceramic, The fixing member and the filter are integrally formed by insert molding. The first component and the fixing component are fixed to each other by an adhesive. In a plan view, an area of ​​the fixing member is smaller than an area of ​​the first member.

13. A liquid ejecting head comprising: The flow channel component according to any one of claims 1 to 12; The nozzle sprays the liquid having passed through the supply flow path.

14. The liquid ejecting head according to claim 13, wherein: The liquid flowing in the supply flow channel is ultraviolet curing ink or solvent ink.

15. The liquid ejecting head according to claim 13 or 14, wherein: A circulation flow channel is provided, wherein the liquid that has passed through the supply flow channel but has not been ejected from the nozzle flows through the circulation flow channel, The first member constitutes a part of the circulation flow channel.

16. A liquid ejection device, comprising: The liquid ejecting head according to any one of claims 13 to 15; A liquid container stores the liquid to be supplied to the liquid ejecting head.

17. A method for manufacturing a flow channel component, wherein: The flow channel component has: a supply channel for the flow of liquid; a filter disposed midway along the supply flow channel and allowing liquid to pass therethrough; a fixing member constituting a part of the supply flow channel and made of a thermoplastic resin; a first member constituting a part of the supply flow path and being made of any one of a thermosetting resin, a metal and a ceramic, In the method for manufacturing the flow channel component, After the filter and the fixing member are welded, the fixing member and the first member are bonded together with an adhesive. In a plan view, the area of ​​the fixing member is made smaller than the area of ​​the first member.

18. A method for manufacturing a flow channel component, wherein: The flow channel component has: a supply channel for the flow of liquid; a filter disposed midway along the supply flow channel and allowing liquid to pass therethrough; a fixing member constituting a part of the supply flow channel and made of a thermoplastic resin; a first member constituting a part of the supply flow path and being made of any one of a thermosetting resin, a metal and a ceramic, In the method for manufacturing the flow channel component, After the fixing member is formed by insert molding using the filter as an insert, the fixing member and the first member are bonded together by an adhesive. In a plan view, the area of ​​the fixing member is made smaller than the area of ​​the first member.

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