WO2016194776A1 - インクジェットヘッド及びインクジェット記録装置 - Google Patents
インクジェットヘッド及びインクジェット記録装置 Download PDFInfo
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- WO2016194776A1 WO2016194776A1 PCT/JP2016/065606 JP2016065606W WO2016194776A1 WO 2016194776 A1 WO2016194776 A1 WO 2016194776A1 JP 2016065606 W JP2016065606 W JP 2016065606W WO 2016194776 A1 WO2016194776 A1 WO 2016194776A1
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- WIPO (PCT)
- Prior art keywords
- ink
- separation wall
- ink chamber
- spacer
- outer peripheral
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14201—Structure of print heads with piezoelectric elements
- B41J2/14233—Structure of print heads with piezoelectric elements of film type, deformed by bending and disposed on a diaphragm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/21—Ink jet for multi-colour printing
- B41J2/2103—Features not dealing with the colouring process per se, e.g. construction of printers or heads, driving circuit adaptations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14201—Structure of print heads with piezoelectric elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/145—Arrangement thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/145—Arrangement thereof
- B41J2/155—Arrangement thereof for line printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/17—Ink jet characterised by ink handling
- B41J2/175—Ink supply systems ; Circuit parts therefor
- B41J2/17503—Ink cartridges
- B41J2/17513—Inner structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2002/14459—Matrix arrangement of the pressure chambers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2002/14491—Electrical connection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/18—Electrical connection established using vias
Definitions
- the present invention relates to an inkjet head and an inkjet recording apparatus.
- an ink jet recording apparatus that forms an image on a recording medium by ejecting ink droplets from a plurality of nozzles provided in the ink jet head.
- the number of nozzles provided in an inkjet head has increased with the increase in accuracy and speed of images formed by inkjet recording apparatuses, and inkjet heads in which a large number of nozzles are positioned with high accuracy are known. Yes.
- a plurality of inkjet heads of a plurality of colors corresponding to cyan, magenta, yellow, black, and the like are mounted, so that there is a problem that the apparatus tends to be large.
- an inkjet head capable of printing a plurality of colors of ink with one inkjet head is known.
- the number of ink jet heads required for the apparatus can be reduced, and the ink jet head recording apparatus can be downsized.
- the number of ink-jet heads for alignment can be reduced, labor and time for mounting the ink-jet head can also be reduced.
- an inkjet head capable of printing a plurality of colors of ink
- a head chip is provided with an array of a large number of nozzle holes corresponding to four colors of cyan, magenta, yellow and black, and for each array of nozzle holes of each color
- An inkjet head that communicates with each color ink supply channel is disclosed (Patent Document 1).
- an inkjet head capable of ejecting a plurality of colors of ink
- the head chip when the head chip has a simpler configuration, it is provided above the pressure chamber in order to supply ink to the pressure chamber corresponding to each nozzle.
- the ink is supplied from the ink supply holes.
- the ink supply holes are also narrow in pitch and the interval between the ink supply holes is narrowed, making it difficult to provide a separated ink chamber on the head chip. .
- the ink jet head since it is necessary to directly bond the ink supply channel (ink chamber) to the head chip, the ink supply channel is accurately positioned with respect to the narrow pitch ink supply holes. There was a problem that it had to adhere and it was difficult to separate into multiple colors.
- the present invention has been made in view of such problems, and it is an object of the present invention to provide an ink jet head and an ink jet recording apparatus that can separate ink chambers with high accuracy with a simple configuration.
- the invention according to claim 1 is an inkjet head, A plurality of nozzles for ejecting ink; a plurality of pressure chambers respectively communicating with the plurality of nozzles; and pressure generating means for ejecting ink from the nozzles by causing a pressure change inside the plurality of pressure chambers.
- a head chip having An ink chamber for storing ink to be supplied to the plurality of pressure chambers;
- a holding part that holds the ink chamber and is bonded to an ink supply hole forming surface on which ink supply holes that are opposite to the surface on which the plurality of nozzles of the head chip are formed;
- the holding portion includes an outer peripheral wall holding portion that holds an outer peripheral wall of the ink chamber, and a separation wall holding portion that holds a separation wall of the ink chamber, The ink chamber is separated into a plurality by the separation wall and the separation wall holding portion.
- the invention according to claim 2 is the ink jet head according to claim 1,
- the separation wall holding portion is characterized in that the surface joined to the separation wall has a larger area than the surface joined to the ink supply hole forming surface.
- the invention according to claim 3 is the ink jet head according to claim 2,
- the separation wall holding portion is formed so as to expand stepwise from a surface joining the ink supply hole forming surface to a surface joining the separation wall.
- the outer peripheral wall holding portion includes a first spacer portion that is bonded to the ink supply hole forming surface, and an outer peripheral wall support portion that is bonded to the first spacer portion and supports the outer peripheral wall.
- the separation wall holding part includes a second spacer part joined to the ink supply hole forming surface, and a separation wall support part joined to the second spacer part and supporting the separation wall.
- the invention according to claim 5 is the inkjet head according to claim 4,
- the first spacer portion and the second spacer portion are integrally formed.
- the invention according to claim 6 is the ink jet head according to claim 4 or 5,
- the first spacer part and the second spacer part are thinner than the outer peripheral wall support part and the separation wall support part.
- the invention according to claim 7 is the inkjet head according to any one of claims 1 to 6,
- the ink supply holes are arranged at equal intervals.
- the invention according to claim 8 is the inkjet head according to any one of claims 4 to 6,
- the first spacer part and the second spacer part are made of silicon, 42 alloy, or SUS.
- the invention according to claim 9 is the ink jet head according to any one of claims 1 to 8,
- the ink chamber is divided into a plurality including at least a first ink chamber and a second ink chamber, and the ink stored in the first ink chamber is different from the ink stored in the second ink chamber. It is characterized by.
- the invention according to claim 10 is: An ink jet recording apparatus comprising the ink jet head according to any one of claims 1 to 9.
- the ink chambers can be separated with high accuracy with a simple configuration.
- FIG. 2A A perspective view showing a schematic configuration of an ink jet recording apparatus Perspective view from above of inkjet head Perspective view from below of inkjet head Sectional drawing which shows the principal part of the cross section of III-III of FIG. 2A The perspective view which shows the cross section of FIG. Enlarged view of the main part of FIG.
- the ink jet recording apparatus 100 includes a platen 101, a conveyance roller 102, line heads 103 and 104, and the like (FIG. 1).
- the platen 101 supports the recording medium K on the upper surface, and transports the recording medium K in the transport direction (X direction) when the transport roller 102 is driven.
- the line heads 103 and 104 are provided in parallel in the width direction orthogonal to the transport direction from the upstream side to the downstream side in the transport direction of the recording medium K.
- At least one inkjet head 1 is provided inside the line heads 103 and 104. For example, cyan (C), magenta (M), yellow (Y), and black (K) inks are recorded on the recording medium. Ejected toward K.
- the line heads 103 and 104 are provided with an ink jet head 1 capable of ejecting two colors of ink.
- the line head 103 is provided with at least one inkjet head 1 capable of ejecting cyan (C) and magenta (M) ink
- the line head 104 includes yellow (Y) and black (K).
- At least one inkjet head 1 capable of ejecting the ink is provided.
- a plane provided with a plurality of nozzles 11 is defined as an XY plane, and directions along the plane and orthogonal to each other are defined as an X direction and a Y direction, respectively.
- the direction orthogonal to the XY plane is taken as the Z direction.
- the tip side of the arrow in the X direction is the downstream side in the X direction, and the direction opposite to the tip side is the upstream side in the X direction.
- the inkjet head 1 includes a head chip 2, a holding unit 90, an ink chamber 3, a connection member 4, and the like (see FIGS. 2A, 2B, and 3).
- the head chip 2 is configured by laminating a plurality of substrates in the Z direction, and the lowermost substrate is provided with a large number of nozzles 11 for ejecting ink (see FIG. 10).
- a pressure chamber 311 filled with ink corresponding to each nozzle 11 and a piezoelectric element 42 as pressure generating means are provided inside the head chip 2.
- a large number of ink supply holes 601 are provided in the wiring substrate 50, which is the uppermost layer of the head chip 2 (see FIGS. 4 to 6), and the ink chambers are provided.
- Ink is supplied from 3 to the pressure chamber 311 through the ink supply hole 601.
- the ink filled in the pressure chamber 311 is pressurized by the displacement of the piezoelectric element 42, and ink droplets are ejected from the nozzle 11.
- the ink chamber 3 is separated into two by an outer peripheral wall 3a, a separation wall 3b, and a holding portion 90, and two colors of cyan (C), magenta (M), yellow (Y), and black (K) are Each separated ink chamber 3 is filled with one color. Then, the ink chamber 3 separated into two passes through the ink supply hole 601 provided on the uppermost surface of the head chip 2 to the pressure chamber 311 provided in the ink ejection portions 7 and 8 inside the head chip 2. Ink is supplied. For each of the two ink chambers 3 separated, an ink supply unit 301 that supplies ink to the ink chamber 3 and an ink discharge unit 302 that discharges ink in the ink chamber 3 are provided (FIG. 2A). reference).
- connection member 4 is a wiring member connected to the drive unit 5 made of, for example, FPC, and the first wiring 57 via the through electrode 55 on the upper surface of the wiring substrate 50 of the head chip 2 or the second lower surface of the wiring substrate 50.
- the wiring 58 is connected. Then, electricity is supplied from the driving unit 5 to the piezoelectric element 42 through the connection member 4 and the first wiring 57 or the second wiring 58.
- the connection member 4 connected to the lower surface of the wiring substrate 50 is routed to the upper surface of the holding portion 90 from the through hole of the holding portion 90 opened near the end in the X direction of the wiring substrate 50.
- the holding portion 90 includes an outer peripheral wall holding portion 90a that holds the outer peripheral wall 3a of the ink chamber 3, and a separation wall holding portion 90b that holds a separation wall 3b that separates the ink chamber 3 into two (FIG. 3). Etc.).
- the outer peripheral wall 3a and the separation wall 3b of the ink chamber 3 can be provided using the holding unit 90 as a mark. Therefore, the ink chamber 3 can be separated with high accuracy with a simple configuration.
- the surface of the separation wall holding portion 90b that is joined to the separation wall 3b has a larger area than the surface that is joined to the ink supply hole forming surface 600. Thereby, since the joint surface with the separation wall 3b can be made wider, the reliability of the joint surface can be improved.
- the separation wall holding portion 90b is formed so as to expand stepwise from the surface joining the ink supply hole forming surface 600 to the surface joining the separation wall 3b (see FIGS. 3 to 5 and the like).
- the joint surface with the separation wall 3b be made wider, but a wider space can be secured in the vicinity of the ink supply hole 601. Therefore, an increase in flow resistance near the separation wall holding portion 90b is suppressed, and the pressure applied to the ink supply holes 601 provided near the separation wall holding portion 90b and the ink supply holes 601 away from the separation wall holding portion 90b is equalized. Can be dispersed. Therefore, the ink can be stably supplied from the ink chamber 3 to all the ink supply holes 601.
- the separation wall holding portion 90b is preferably stepped from the viewpoint of manufacturing efficiency, but the area joined to the separation wall 3b has a larger area than the face joined to the ink supply hole forming surface 600. If so, it can be changed as appropriate.
- the cross-sectional area of the XY plane of the separation wall holding portion 90b may gradually increase from the surface joined to the ink supply hole forming surface 600 toward the surface joined to the separation wall 3b.
- the outer peripheral wall holding portion 90a is joined to the uppermost surface (ink supply hole forming surface 600) of the head chip 2, and the outer peripheral wall support portion 92a that joins the first spacer portion 91a and supports the outer peripheral wall 3a. (See FIG. 4 and FIG. 5 etc.).
- the separation wall holding portion 90b is a second spacer portion 91b that is joined to the uppermost surface (ink supply hole forming surface 600) of the head chip 2, and a separation wall support that is joined to the second spacer portion 91b and supports the separation wall 3b. It is comprised from the part 92b.
- the outer peripheral wall support portion 92a and the first spacer portion 91a and the second spacer portion 91b are used as marks. Since the separation wall support portion 92b can be provided and then the ink chamber 3 can be provided, the ink chamber 3 can be provided on the upper surface of the head chip 2 with higher accuracy.
- first spacer portion 91a and the second spacer portion 91b are integrally formed as shown in FIG. (Hereinafter, when the “first spacer portion 91a and the second spacer portion 91b” are described together, it is also referred to as “spacer portion 91”.)
- the upper surface of the head chip 2 (ink supply hole forming surface). 600)
- the spacer portion 91 having a uniform height in the Z direction can be provided on the entire surface, so that the ink can hardly leak.
- the spacer 91 is joined to the head chip 2 from the viewpoint of positioning with high accuracy by providing alignment marks (not shown) on the spacer 91 and the head chip 2, respectively, and positioning and joining them. It is desirable to do.
- the spacer 91 is preferably thinner in the Z direction than the outer peripheral wall support 92a and the separation wall support 92b from the viewpoint of performing alignment with high accuracy.
- 0.05 to 0.5 mm is preferable, and 0.1 to 0.3 mm is more preferable.
- the thickness is set to 0.5 mm or less, the spacer portion 91 with high processing accuracy can be obtained, and the position can be adjusted with high accuracy.
- strength as a spacer can be obtained by setting it as 0.05 mm or more.
- the material for forming the spacer portion 91 is not particularly limited, but a material having a thermal expansion coefficient close to that of the material for forming the head chip 2 is preferable.
- the spacer portion 91 is preferably formed of silicon, 42 alloy, glass, or the like. Of these, it is particularly preferable to use 42 alloy from the viewpoints of ink resistance, strength, and heat resistance.
- the spacer portion 91 is preferably formed of SUS.
- the positional relationship between the spacer portion 91 and the ink supply hole forming surface 600 is formed on the ink supply hole forming surface 600 with respect to the X direction corresponding to the nozzle arrangement (see FIG. 10) described later.
- Ink supply holes 601 are formed at equal row intervals.
- the second spacer portion 91b is formed so as to pass in the Y direction between the rows of the ink supply holes with equal row intervals.
- the holding unit 90 has a larger area than the head chip 2 on the XY plane, and can suitably dissipate heat around the head chip 2.
- the ink ejection portions 7 and 8 have two forms as shown in FIGS. 7 and 8, and the ink ejection portion 7 includes a through electrode 55 on the wiring board 50, and the ink ejection portion 8 is the wiring board. 50 does not include the through electrode 55.
- the ink ejection unit 7 will be described in detail first, and only the differences between the ink ejection unit 8 and the ink ejection unit 7 will be described later.
- a pressure chamber 311, an inlet 512, and the like, which will be described later, are illustrated by solid lines in FIG. 9.
- the ink ejection unit 7 has a six-layer structure including a nozzle substrate 10, an adhesive substrate 20, a pressure chamber substrate 30, a spacer substrate 40, a wiring substrate 50, and an adhesive layer 60 in order from the lower side in the Z direction. Has been.
- the nozzle substrate 10 is a silicon substrate and is located in the lowermost layer of the ink ejection unit 7. A plurality of nozzles 11 are formed on the nozzle substrate 10, and the lower surface of the nozzle substrate 10 is a surface on which nozzles are formed.
- the bonding substrate 20 is a glass substrate, and is laminated and bonded to the upper surface of the nozzle substrate 10.
- the bonding substrate 20 is formed with a through hole 201 that communicates with the nozzle 11 of the nozzle substrate 10 and penetrates in the Z direction, which is the stacking direction.
- the pressure chamber substrate 30 includes a pressure chamber layer 31 and a diaphragm 32.
- the pressure chamber layer 31 is a silicon substrate and is laminated and bonded to the upper surface of the bonding substrate 20.
- a pressure chamber 311 that applies an ejection pressure to the ink ejected from the nozzle 11 is formed so as to penetrate the pressure chamber layer 31 in the Z direction.
- the pressure chamber 311 is provided above the through hole 201 and the nozzle 11 and communicates with the through hole 201 and the nozzle 11.
- a communication hole 312 communicating with the pressure chamber 311 is formed in the pressure chamber layer 31 so as to extend in the horizontal direction while penetrating the pressure chamber layer 31 in the Z direction (see FIG. 9).
- the diaphragm 32 is laminated and bonded to the upper surface of the pressure chamber layer 31 so as to cover the opening of the pressure chamber 311. That is, the diaphragm 32 constitutes the upper wall portion of the pressure chamber 311. An oxide film is formed on the surface of the diaphragm 32.
- the diaphragm 32 is formed with a through hole 321 that communicates with the communication hole 312 and penetrates in the Z direction.
- the spacer substrate 40 is a substrate made of 42 alloy and is a partition layer that is laminated on the upper surface of the diaphragm 32 and forms a space 41 between the diaphragm 32 and the wiring substrate 50.
- the space 41 is formed above the pressure chamber 311 so as to penetrate the spacer substrate 40 in the Z direction, and accommodates the piezoelectric element 42 therein.
- the piezoelectric element 42 is formed in substantially the same planar view shape as the pressure chamber 311 and is provided at a position facing the pressure chamber 311 with the diaphragm 32 interposed therebetween (see FIG. 9).
- the piezoelectric element 42 is an actuator made of PZT (lead zirconium titanate) for deforming the diaphragm 32.
- the piezoelectric element 42 is provided with two electrodes 421 and 422 on the upper surface and the lower surface, and the electrode 422 on the lower surface side is connected to the diaphragm 32.
- a through hole 401 that communicates with the through hole 321 of the diaphragm 32 and penetrates in the Z direction is formed in the spacer substrate 40 independently of the space 41.
- the wiring board 50 includes an interposer 51 that is a silicon substrate.
- the lower surface of the interposer 51 is covered with two layers of insulating layers 52 and 53 of silicon oxide, and the upper surface is also covered with an insulating layer 54 of silicon oxide.
- the insulating layer 53 positioned below the insulating layers 52 and 53 is laminated on the upper surface of the spacer substrate 40 and bonded thereto.
- a through hole 511 that penetrates in the Z direction is formed in the interposer 51, and the through electrode 55 is inserted into the through hole 511.
- One end of a third copper wiring 56 extending in the horizontal direction is connected to the lower end of the through electrode 55, and the other end of the third wiring 56 is provided on the electrode 421 on the upper surface of the piezoelectric element 42.
- the stud bump 423 is connected via the solder 561 exposed in the space 41.
- a first wiring 57 is connected to the upper end of the through electrode 55, and the first wiring 57 extends in the horizontal direction and is connected to the connection member 4 (see FIG. 3).
- the third wiring 56 is sandwiched and protected by two insulating layers 52 and 53 on the lower surface of the interposer 51.
- the third wiring 56 is made of copper, the material can be appropriately changed as long as it is a conductor. For example, aluminum may be used.
- the interposer 51 is formed with an inlet 512 that communicates with the through hole 401 of the spacer substrate 40 and penetrates in the Z direction. Of the insulating layers 52 to 54, each portion covering the vicinity of the inlet 512 is formed to have an opening diameter larger than that of the inlet 512.
- the adhesive layer 60 is laminated and bonded to the upper surface of the insulating layer 54 of the interposer 51 while covering the first wiring 57 disposed on the upper surface of the wiring substrate 50.
- the adhesive layer 60 is a layer that adheres to the holding portion 90 and is a photosensitive resin layer, and also serves as a protective layer that protects the first wiring 57.
- the adhesive layer 60 has an ink supply hole 601 that communicates with the inlet 512 and penetrates in the Z direction.
- the communication hole 312, the through holes 321 and 401, the ink supply hole 601, and the inlet 512 constitute an individual flow path 70 that connects the ink chamber 3 and the pressure chamber 311.
- the configuration of the ink ejection unit 8 will be described with reference to FIG. Only the wiring board 50 having a different configuration from that of the ink ejection unit 7 will be described, and the other components are denoted by the same reference numerals, and the description thereof is omitted.
- the wiring board 50 includes an interposer 51 that is a silicon substrate.
- the lower surface of the interposer 51 is covered with two layers of insulating layers 52 and 53 of silicon oxide, and the upper surface is also covered with an insulating layer 54 of silicon oxide.
- the insulating layer 53 positioned below the insulating layers 52 and 53 is laminated on the upper surface of the spacer substrate 40 and bonded thereto.
- a third wiring 56 extends horizontally on the lower surface of the interposer 51 and is sandwiched and protected by two insulating layers 52 and 53 on the lower surface of the interposer 51.
- a stud bump 423 provided on the electrode 421 on the upper surface of the piezoelectric element 42 is connected to one end of the third wiring 56 via solder 561 exposed in the space 41.
- the second wiring is connected to the other end of the third wiring 56, and the second wiring 58 extends in the horizontal direction and is connected to the connecting member 4 (see FIG. 3).
- the ink in the ink chamber 3 is supplied to the pressure chamber 311 through the individual flow path 70.
- a voltage is applied between the electrodes 421 and 422 through the third wiring 56 by the first wiring 57 or the second wiring 58 connected to the connecting member 4 in accordance with the driving signal from the driving unit 5.
- the piezoelectric element 42 sandwiched between 422 is deformed together with the vibration plate 32, and the ink in the pressure chamber 311 is pushed out and ejected from the nozzle 11.
- the nozzle 11 forms four parallelogram-shaped nozzle formation areas N1 to N4 on the nozzle substrate 10, and a matrix along the direction of each side of the parallelogram in each nozzle formation area. Are arranged side by side.
- a direction parallel to the Y direction in the parallelogram will be described as a first direction D1
- a direction slightly inclined from the X direction to the Y direction will be described as a second direction D2.
- the nozzle formation areas N1 to N4 have the same direction in the first direction D1 and the second direction D2, and four regions having the same area are arranged in the X direction. The same number of nozzles 11 are included in each area. Is provided.
- the nozzle formation areas N1 to N4 are arranged in the order of N1, N3, N2, and N4 in order from the downstream side in the X direction on the nozzle substrate 10, and the column intervals of the nozzles in the X direction are uniform. Yes.
- the nozzle formation areas N1 to N4 are arranged slightly shifted at equal intervals in the order of N1, N2, N3, and N4 toward the downstream side in the Y direction. All the nozzles 11 provided on the nozzle substrate 10 are arranged so as to be slightly shifted at equal intervals with respect to the first direction D1 (Y direction).
- the nozzle formation areas N1 to N4 in the inkjet head 1 are arranged so as to be N1, N3, N2, and N4 from the downstream side in the X direction as shown in FIG.
- each of the nozzle formation areas N1 to N4 is wired at the end of the wiring board 50 closer to the nozzle formation area.
- N1 and N3 are downstream in the X direction, and N2 and N4. Is wired upstream in the X direction, connected to the connection member 4, and finally connected to the drive unit 5.
- the nozzle formation areas N1 and N4 are nozzle formation areas provided on the end side of the nozzle substrate 10 and are wired from the second wiring 58 on the lower surface of the wiring substrate 50.
- the downstream side in the X direction, N4 is wired and connected to the upstream side in the X direction.
- the nozzle formation areas N2 and N3 are nozzle formation areas provided on the center side of the nozzle substrate 10, and are wired from the first wiring 57 on the upper surface of the wiring substrate 50 through the through electrode 55, as shown in FIG. , N3 are wired and connected downstream in the X direction, and N2 is wired upstream in the X direction.
- FIG. 11 shows a diagram in which only one upper portion is penetrated in the nozzle formation areas N2 and N3.
- the through electrodes 55 are provided one by one, and are wired through the wiring board 50 one by one corresponding to each nozzle 11.
- the holding unit 90 of the inkjet head 1 includes an outer peripheral wall holding unit 90a that holds the outer peripheral wall 3a of the ink chamber 3, and a separation wall 3b that separates the ink chamber 3 into four in the X direction. And three separation wall holding portions 90b.
- the outer peripheral wall holding portion 90a is joined to the uppermost surface (ink supply hole forming surface 600) of the head chip 2, and the outer peripheral wall support portion 92a that joins the first spacer portion 91a and supports the outer peripheral wall 3a.
- the separation wall holding portion 90b is a second spacer portion 91b that is joined to the uppermost surface (ink supply hole forming surface 600) of the head chip 2, and a separation wall support that is joined to the second spacer portion 91b and supports the separation wall 3b. It is comprised from the part 92b.
- first spacer portion 91a and the second spacer portion 91b are integrally formed and have a spacer portion 91 having a uniform height in the Z direction with respect to the entire surface of the ink supply hole forming surface 600. Yes.
- the ink chamber 3 is separated into four by an outer peripheral wall 3a, a separation wall 3b, and a holding unit 90, and cyan (C), magenta (M), yellow (Y), and black (K) are separated from each other.
- the ink chamber 3 is filled one color at a time. Then, the ink chamber 3 separated into four parts passes through the ink supply hole 601 provided on the uppermost surface of the head chip 2, and then enters the pressure chamber 311 provided in the ink ejection portions 7 and 8 inside the head chip 2. Ink is supplied.
- the ink chamber 3 is separated into a plurality of parts by the outer peripheral wall 3 a of the ink chamber 3, the separation wall 3 b of the ink chamber 3, and the holding portion 90. Further, in the head chip 2 of the present invention, the nozzles 11 are arranged on the lowermost substrate, and in order to supply ink to the pressure chambers 311 corresponding to the nozzles 11, the ink supply holes are formed on the uppermost substrate. 601 is arranged with high density.
- the holding unit 90 of the present invention is bonded to the uppermost surface (ink supply hole forming surface 600) of the head chip 2, and after the holding unit 90 is provided in alignment with the upper surface of the head chip 2, the holding unit 90 is mounted.
- an outer peripheral wall 3a and a separation wall 3b of the ink chamber 3 can be provided. Therefore, the ink chamber 3 can be separated with high accuracy with a simple configuration.
- the separation wall holding portion 90b is formed so that the surface of the ink chamber 3 that joins the separation wall 3b has a larger area than the surface that joins the ink supply hole forming surface 600. Thereby, since the joint surface with the separation wall 3b of the ink chamber 3 can be made wider, the reliability of the joint surface can be improved.
- the separation wall holding portion 90b is formed so as to expand stepwise from the surface joined to the ink supply hole forming surface 600 to the surface joined to the separation wall 3b of the ink chamber 3.
- a wider space can be secured near the ink supply hole 601. Therefore, the pressure applied to the ink supply hole 601 provided in the vicinity of the separation wall holding part 90b and the ink supply hole 601 at a position away from the separation wall holding part 90b is suppressed by suppressing an increase in the channel resistance in the vicinity of the separation wall holding part 90b. Can be evenly distributed. Therefore, the ink can be stably supplied from the ink chamber 3 to all the ink supply holes 601.
- the holding unit 90 of the present invention includes an outer peripheral wall holding unit 90a that holds the outer peripheral wall 3a of the ink chamber 3, and a separation wall holding unit 90b that holds a separation wall 3b that separates the ink chamber 3 into a plurality of parts.
- the outer peripheral wall holding portion 90a includes a first spacer portion 91a that is bonded to the ink supply hole forming surface 600, and an outer peripheral wall support portion 92a that is bonded to the first spacer portion 91a and supports the outer peripheral wall 3a of the ink chamber 3. ,have.
- the separation wall holding part 90b includes a second spacer part 91b joined to the ink supply hole forming surface 600, a separation wall support part 92b joined to the second spacer part 91b and supporting the separation wall 3b of the ink chamber 3, have.
- the outer peripheral wall support portion 92a and the first spacer portion 91a and the second spacer portion 91b are used as marks. Since the separation wall support portion 92b can be provided and then the ink chamber 3 can be provided, the ink chamber 3 can be provided on the upper surface of the head chip 2 with higher accuracy.
- the first spacer portion 91a and the second spacer portion 91b are integrally formed.
- the entire surface of the ink supply hole forming surface 600 which is the upper surface of the head chip 2
- alignment can be performed with high accuracy by providing alignment marks on each of the spacer portion 91 and the head chip 2 of the present invention and positioning and joining each. If such an alignment method is used, alignment with an error level of about ⁇ 5 ⁇ m is possible, and even for an ink supply hole forming surface 600 having an ink supply hole 601 with a narrow pitch of about 10 ⁇ m. It can be aligned with accuracy.
- the spacer portion 91 is configured to be thinner than the outer peripheral wall support portion 92a and the separation wall support portion 92b. Thereby, alignment can be performed with higher accuracy.
- the column intervals of the ink supply holes 601 in the X direction are arranged at equal intervals corresponding to the nozzle arrangement.
- the ink chamber 3 can be separated without securing a large space for joining the separation wall 3b on the ink supply hole forming surface 600.
- the line intervals of the ink supply holes 601 can be kept uniform according to the nozzle arrangement. Therefore, even when the nozzle arrangement is arranged at a high density and a uniform line interval, the ink supply holes 601 can also be formed at a high density and a uniform line interval in accordance with the nozzle arrangement.
- the ink chamber 3 can be separated by providing the separation wall holding portion 90b and the separation wall 3b on the head chip 2 for one color, it is not necessary to separately manufacture the head chip 2 for a plurality of colors.
- the direction and number of separation of the ink chamber 3 can be changed as appropriate.
- the embodiment in which the spacer unit 91 is provided in the holding unit 90 has been described, the configuration having the spacer unit 91 is not necessarily required as long as the ink chamber 3 can be separated by the holding unit 90.
- a part of the outer peripheral wall 3a of the ink chamber 3 may be formed of an elastic resin member. Thereby, it is possible to prevent the internal pressure of the ink chamber 3 from rapidly increasing or decreasing, and to stably supply ink from the ink chamber 3 to the pressure chamber 311.
- the spacer portion 91 is configured to avoid the ink supply hole 601 and includes a first spacer portion 91a joined to the outer peripheral wall support portion 92a and a second spacer portion 91b joined to the separation wall support portion 92b. If it has the structure which has, it can change suitably.
- the arrangement of the nozzles 11 is divided into four parallelogram shaped nozzle formation areas, but the shape and number of the nozzle formation areas can be changed as appropriate.
- the eight nozzle formation areas are divided into eight nozzle formation areas. It may be provided.
- the arrangement of the nozzles 11 can be appropriately changed.
- the arrangement may be such that the first direction D1 and the second direction D2 are orthogonal to each other.
- first wiring 57 and the second wiring 58 are not particularly limited to the wiring method as long as the first wiring 57 and the second wiring 58 are configured to be connected to the connection terminals for connecting the piezoelectric elements 42 to the connection member 4. It can be designed as appropriate. However, since the wiring substrate 50 is provided with the individual flow path 70 as the ink flow path, it is necessary to perform wiring so as to avoid the individual flow path 70.
- the piezoelectric element 42 is used as the pressure generating means, there is no particular limitation as long as a mechanism capable of ejecting ink is provided.
- thermal electroactive conversion element
- the present invention can be used for an inkjet head and an inkjet recording apparatus.
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
特許文献1のようなインクジェットヘッドでは、ヘッドチップに対してインク供給チャネル(インク室)を直接接着する必要があるため、狭ピッチのインク供給孔に対して、正確に位置決めしてインク供給チャネルを接着しなければならず、複数色に分離することは精度的に難しいという問題があった。
インクを射出する複数のノズルと、前記複数のノズルにそれぞれ連通する複数の圧力室と、前記複数の圧力室の内部の圧力変化を生じさせることにより、前記ノズルからインクを射出させる圧力発生手段と、を有するヘッドチップと、
前記複数の圧力室に供給するインクを貯留するインク室と、
前記ヘッドチップの前記複数のノズルが形成された面と反対側であるインク供給孔が形成されたインク供給孔形成面に接合され、前記インク室を保持する保持部と、を備え、
前記保持部は、前記インク室の外周壁を保持する外周壁保持部と、前記インク室の分離壁を保持する分離壁保持部と、を有し、
前記インク室は、前記分離壁と前記分離壁保持部によって、複数に分離されていることを特徴とする。
前記分離壁保持部は、前記分離壁と接合する面が、前記インク供給孔形成面と接合する面よりも面積が大きいことを特徴とする。
前記分離壁保持部は、前記インク供給孔形成面と接合する面から、前記分離壁と接合する面へ、階段状に広がるように形成されていることを特徴とする。
前記外周壁保持部は、前記インク供給孔形成面に接合する第1スペーサー部と、当該第1スペーサー部と接合し前記外周壁を支持する外周壁支持部と、を有し、
前記分離壁保持部は、前記インク供給孔形成面に接合する第2スペーサー部と、当該第2スペーサー部と接合し前記分離壁を支持する分離壁支持部と、を有することを特徴とする。
前記第1スペーサー部と、前記第2スペーサー部は、一体成形されていることを特徴とする。
前記第1スペーサー部及び前記第2スペーサー部は、前記外周壁支持部及び前記分離壁支持部よりも薄いことを特徴とする。
前記インク供給孔形成面において、前記インク供給孔の列間隔がそれぞれ等間隔となるように配列されていることを特徴とする。
前記第1スペーサー部及び前記第2スペーサー部は、シリコン、42アロイ、又はSUSからなることを特徴とする。
前記インク室は、少なくとも第1インク室及び第2インク室を含む複数に分離されており、前記第1インク室に貯留されるインクと、前記第2インク室に貯留されるインクとが異なることを特徴とする。
請求項1~9のいずれか一項に記載のインクジェットヘッドを備えることを特徴とするインクジェット記録装置である。
なお、以下の説明では、ラインヘッドを用いた記録媒体の搬送のみで描画を行う1パス描画方式での実施形態を例にして説明するが、適宜の描画方式に適用可能であり、例えば、スキャン方式やドラム方式を用いた描画方式を採用しても良い。
インクジェット記録装置100は、プラテン101、搬送ローラー102、ラインヘッド103,104等を備える(図1)。
プラテン101は、上面に記録媒体Kを支持しており、搬送ローラー102が駆動されると、記録媒体Kを搬送方向(X方向)に搬送する。
ラインヘッド103,104は、記録媒体Kの搬送方向の上流側から下流側にかけて、搬送方向に直交する幅方向に並列して設けられている。そして、ラインヘッド103,104の内部には、インクジェットヘッド1が少なくとも一つ設けられており、例えば、シアン(C),マゼンタ(M),イエロー(Y),黒(K)のインクを記録媒体Kに向けて射出する。
インクジェットヘッド1の構成について、図2~11に基づいて説明する。
なお、以下の説明において、複数のノズル11が設けられた平面をX-Y平面とし、当該平面に沿う方向であって、互いに直交する方向をそれぞれX方向、Y方向とする。また、X-Y平面に直交する方向をZ方向とする。また、X方向の矢印の先端側をX方向の下流側、当該先端側とは逆方向側をX方向の上流側とする。
また、2つに分離されたインク室3それぞれに対して、インク室3にインクを供給するインク供給部301と、インク室3のインクを排出するインク排出部302が設けられている(図2A参照)。
保持部90は、インク室3の外周壁3aを保持する外周壁保持部90aと、インク室3を2つに分離する分離壁3bを保持する分離壁保持部90bから構成されている(図3等参照)。これにより、保持部90をヘッドチップ2の上面に位置合わせして設けた後に、保持部90を目印として、インク室3の外周壁3aと分離壁3bを設けることができる。そのため、簡易な構成で高精度にインク室3を分離することができる。
なお、分離壁保持部90bは、製造効率の観点から階段状の形態であることが好ましいが、分離壁3bと接合する面が、インク供給孔形成面600と接合する面よりも面積が大きくなっていれば、適宜変更可能である。例えば、インク供給孔形成面600と接合する面から、分離壁3bと接合する面に向かって、分離壁保持部90bのXY平面の断面積が徐々に大きくなる形態としても良い。
これにより、第1スペーサー部91a及び第2スペーサー部91bを、ヘッドチップ2の上面に位置合わせして設けた後に、第1スペーサー部91a及び第2スペーサー部91bを目印として外周壁支持部92a及び分離壁支持部92bを設け、その後にインク室3を設けることができるため、さらに高精度にインク室3をヘッドチップ2の上面に設けることができる。
インク射出部7,8は、図7及び図8に示す通り、2つの形態を有しており、インク射出部7は、配線基板50に貫通電極55を備え、インク射出部8は、配線基板50に貫通電極55を備えない形態である。
なお、以下の説明では、まずインク射出部7について詳細に説明し、インク射出部8については、インク射出部7との相違点のみを後述する。
また、インク射出部7のZ方向における位置関係を説明する都合上、図9には、後述の圧力室311やインレット512等を実線で示して説明する。
圧力室層31は、シリコン製の基板であり、接着用基板20の上面に積層され、接合されている。圧力室層31には、ノズル11から射出されるインクに射出圧力を付与する圧力室311が、当該圧力室層31をZ方向に貫通するように形成されている。圧力室311は、貫通孔201及びノズル11の上方に設けられ、これら貫通孔201及びノズル11と連通している。また、圧力室層31には、圧力室311と連通する連通孔312が、当該圧力室層31をZ方向に貫通しつつ水平方向に延在するように形成されている(図9参照)。
振動板32は、圧力室311の開口を覆うように圧力室層31の上面に積層され、接合されている。すなわち、振動板32は、圧力室311の上壁部を構成している。振動板32の表面には、酸化膜が形成されている。また、振動板32には、連通孔312と連通してZ方向に貫通する貫通孔321が形成されている。
圧電素子42は、圧力室311と略同一の平面視形状に形成され、振動板32を挟んで圧力室311と対向する位置に設けられている(図9参照)。圧電素子42は、振動板32を変形させるためのPZT(lead zirconium titanate)からなるアクチュエーターであ
る。また、圧電素子42には、上面及び下面に2つの電極421,422が設けられており、このうち下面側の電極422が振動板32に接続されている。
また、スペーサー基板40には、振動板32の貫通孔321と連通してZ方向に貫通する貫通孔401が、空間41とは独立して形成されている。
インターポーザ51には、Z方向に貫通するスルーホール511が形成されており、このスルーホール511には、貫通電極55が挿通されている。貫通電極55の下端には、水平方向に延在する銅製の第三配線56の一端が接続されており、この第三配線56の他端には、圧電素子42上面の電極421に設けられたスタッドバンプ423が、空間41内に露出した半田561を介して接続されている。貫通電極55の上端には、第一配線57が接続されており、第一配線57は水平方向に延在し、接続部材4に接続されている(図3参照)。また、第三配線56は、インターポーザ51下面の2層の絶縁層52,53によって挟まれて保護されている。
なお、第三配線56は銅製であるとしたが、導体であれば素材は適宜変更可能であり、例えば、アルミニウムを使用することとしても良い。
また、インターポーザ51には、スペーサー基板40の貫通孔401と連通してZ方向に貫通するインレット512が形成されている。なお、絶縁層52~54のうち、インレット512近傍を被覆する各部分は、インレット512よりも大きい開口径となるように形成されている。
また、接着層60には、インレット512と連通してZ方向に貫通するインク供給孔601が形成されている。
インターポーザ51の下面には、第三配線56が水平方向に延在しており、インターポーザ51下面の2層の絶縁層52,53によって挟まれて保護されている。第三配線56の一端には、圧電素子42上面の電極421に設けられたスタッドバンプ423が、空間41内に露出した半田561を介して接続されている。また、第三配線56の他端には、第二配線が接続されており、第二配線58は水平方向に延在し、接続部材4に接続されている(図3参照)。
ノズル11は、図10に示すように、ノズル基板10上に平行四辺形状の4つのノズル形成エリアN1~N4を形成し、各ノズル形成エリア内に平行四辺形の各辺の方向に沿ってマトリクス状に並んで配置されている。なお、以下の説明では、平行四辺形のうちY方向に平行な方向を第1方向D1とし、X方向からY方向に対して幾分傾斜した方向を第2方向D2として説明する。
インクジェットヘッド1におけるノズル形成エリアN1~N4の配置は、図11に示す通り、X方向の下流側からN1、N3、N2、N4となるように配置されている。
また、各ノズル形成エリアN1~N4は、それぞれのノズル形成エリアから近い方の配線基板50の端部に配線されており、具体的には、N1とN3はX方向の下流側、N2とN4はX方向の上流側に配線されて接続部材4に接続され、最終的に駆動部5に接続される。
なお、説明の都合上、図11では、ノズル形成エリアN2、N3において、上部の一箇所のみ貫通している図を示しているが、実際には、各ノズル11に対応して、それぞれ一つずつ貫通電極55を備え、各ノズル11に対応して一つずつ配線基板50を貫通して配線されている。
次に、インク室3が4つに分離された他の実施形態(第2実施形態)について、図12~図14に基づいて説明する。なお、本実施形態と同様の構成については、説明を省略する。
以上、説明した通り、本発明のインクジェットヘッド1は、インク室3が、インク室3の外周壁3a、インク室3の分離壁3b及び保持部90によって複数に分離されている。また、本発明のヘッドチップ2は、最下層の基板にはノズル11が配置されており、各ノズル11に対応する圧力室311にインクを供給するために、最上層の基板にはインク供給孔601が高密度に配置されている。
本発明の保持部90は、ヘッドチップ2の最上面(インク供給孔形成面600)に接合されており、保持部90をヘッドチップ2の上面に位置合わせして設けた後に、保持部90を目印として、インク室3の外周壁3aと分離壁3bを設けることができる。そのため、簡易な構成で高精度にインク室3を分離することができる。
これにより、第1スペーサー部91a及び第2スペーサー部91bを、ヘッドチップ2の上面に位置合わせして設けた後に、第1スペーサー部91a及び第2スペーサー部91bを目印として外周壁支持部92a及び分離壁支持部92bを設け、その後にインク室3を設けることができるため、さらに高精度にインク室3をヘッドチップ2の上面に設けることができる。
そのため、ノズル配置を高密度で均等な列間隔で配置した場合であっても、ノズル配置に合わせて、インク供給孔601も高密度で均等な列間隔で形成することができる。これにより、ヘッドチップ2内でインク流路を迂回させる等の複雑な構成は必要なく、ヘッドチップ2を簡易な構成とすることができる。また、1色用のヘッドチップ2に分離壁保持部90b及び分離壁3bを設けることによって、インク室3を分離することができるため、複数色用のヘッドチップ2を別途製造する必要がない。
本発明の今回開示された実施の形態は、全ての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した詳細な説明に限定されるものではなく特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内での全ての変更が含まれることが意図される。
また、保持部90にスペーサー部91を設けた実施形態について説明したが、保持部90によってインク室3を分離することができれば、必ずしもスペーサー部91を有する構成としなくとも良い。
また、スペーサー部91は、インク供給孔601を避けるように構成されており、かつ外周壁支持部92aに接合する第1スペーサー部91aと、分離壁支持部92bに接合する第2スペーサー部91bを有する構成となっていれば、適宜変更可能である。
また、ノズル11の配置に関しても適宜変更可能であり、例えば、第1方向D1と第2方向D2とが直交するように配置しても良い。
2 ヘッドチップ
3 インク室
3a 外周壁
3b 分離壁
11 ノズル
42 圧電素子
90 保持部
90a 外周壁保持部
90b 分離壁保持部
91 スペーサー部
91a 第1スペーサー部
91b 第2スペーサー部
92a 外周壁支持部
92b 分離壁支持部
100 インクジェット記録装置
311 圧力室
600 インク供給孔形成面
601 インク供給孔
Claims (10)
- インクを射出する複数のノズルと、前記複数のノズルにそれぞれ連通する複数の圧力室と、前記複数の圧力室の内部の圧力変化を生じさせることにより、前記ノズルからインクを射出させる圧力発生手段と、を有するヘッドチップと、
前記複数の圧力室に供給するインクを貯留するインク室と、
前記ヘッドチップの前記複数のノズルが形成された面と反対側であるインク供給孔が形成されたインク供給孔形成面に接合され、前記インク室を保持する保持部と、を備え、
前記保持部は、前記インク室の外周壁を保持する外周壁保持部と、前記インク室の分離壁を保持する分離壁保持部と、を有し、
前記インク室は、前記分離壁と前記分離壁保持部によって、複数に分離されていることを特徴とするインクジェットヘッド。 - 前記分離壁保持部は、前記分離壁と接合する面が、前記インク供給孔形成面と接合する面よりも面積が大きいことを特徴とする請求項1に記載のインクジェットヘッド。
- 前記分離壁保持部は、前記インク供給孔形成面と接合する面から、前記分離壁と接合する面へ、階段状に広がるように形成されていることを特徴とする請求項2に記載のインクジェットヘッド。
- 前記外周壁保持部は、前記インク供給孔形成面に接合する第1スペーサー部と、当該第1スペーサー部と接合し前記外周壁を支持する外周壁支持部と、を有し、
前記分離壁保持部は、前記インク供給孔形成面に接合する第2スペーサー部と、当該第2スペーサー部と接合し前記分離壁を支持する分離壁支持部と、を有することを特徴とする請求項1~3のいずれか一項に記載のインクジェットヘッド。 - 前記第1スペーサー部と、前記第2スペーサー部は、一体成形されていることを特徴とする請求項4に記載のインクジェットヘッド。
- 前記第1スペーサー部及び前記第2スペーサー部は、前記外周壁支持部及び前記分離壁支持部よりも薄いことを特徴とする請求項4又は5に記載のインクジェットヘッド。
- 前記インク供給孔形成面において、前記インク供給孔の列間隔がそれぞれ等間隔となるように配列されていることを特徴とする請求項1~6のいずれか一項に記載のインクジェットヘッド。
- 前記第1スペーサー部及び前記第2スペーサー部は、シリコン、42アロイ、又はSUSからなることを特徴とする請求項4~6のいずれか一項に記載のインクジェットヘッド。
- 前記インク室は、少なくとも第1インク室及び第2インク室を含む複数に分離されており、前記第1インク室に貯留されるインクと、前記第2インク室に貯留されるインクとが異なることを特徴とする請求項1~8のいずれか一項に記載のインクジェットヘッド。
- 請求項1~9のいずれか一項に記載のインクジェットヘッドを備えることを特徴とするインクジェット記録装置。
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US15/578,066 US10343415B2 (en) | 2015-05-29 | 2016-05-26 | Inkjet head and inkjet recording device including ink chamber with separated portions |
JP2017521883A JP6733669B2 (ja) | 2015-05-29 | 2016-05-26 | インクジェットヘッド及びインクジェット記録装置 |
CN201680029833.8A CN107614269B (zh) | 2015-05-29 | 2016-05-26 | 喷墨头以及喷墨记录装置 |
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JP7028881B2 (ja) | 2017-02-06 | 2022-03-02 | メムジェット テクノロジー リミテッド | フルカラーのページ幅印刷のためのインクジェットプリントヘッド |
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