WO2023190211A1 - 液体吐出ヘッドおよび記録装置 - Google Patents
液体吐出ヘッドおよび記録装置 Download PDFInfo
- Publication number
- WO2023190211A1 WO2023190211A1 PCT/JP2023/011941 JP2023011941W WO2023190211A1 WO 2023190211 A1 WO2023190211 A1 WO 2023190211A1 JP 2023011941 W JP2023011941 W JP 2023011941W WO 2023190211 A1 WO2023190211 A1 WO 2023190211A1
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- WO
- WIPO (PCT)
- Prior art keywords
- flow path
- pressurizing chamber
- manifold
- hole
- discharge hole
- 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
- B41J2/14209—Structure of print heads with piezoelectric elements of finger type, chamber walls consisting integrally of piezoelectric material
-
- 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
- B41J2/14209—Structure of print heads with piezoelectric elements of finger type, chamber walls consisting integrally of piezoelectric material
- B41J2002/14225—Finger type piezoelectric element on only one side of the chamber
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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
- B41J2002/14306—Flow passage between manifold and chamber
-
- 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
- B41J2202/11—Embodiments of or processes related to ink-jet heads characterised by specific geometrical characteristics
Definitions
- the disclosed embodiments relate to a liquid ejection head and a recording device.
- Inkjet printers and inkjet plotters that use an inkjet recording method are known as printing devices.
- Such an inkjet printing apparatus is equipped with a liquid ejection head for ejecting liquid.
- Such a liquid ejection head includes a plurality of ejection holes, a plurality of pressure chambers each connected to the plurality of ejection holes, and a manifold commonly connected to the plurality of pressurization chambers.
- the plurality of pressurizing chambers include a pressurizing chamber relatively far from the manifold and a pressurizing chamber relatively close to the manifold (for example, see Patent Document 1).
- a liquid ejection head includes a flow path member having a first surface and a second surface located on the opposite side of the first surface, and a pressurizing section located on the first surface.
- the flow path member includes a first discharge hole and a second discharge hole located on the second surface, a first individual flow path connected to the first discharge hole, and a first discharge hole located on the upstream side of the first discharge hole within the first individual flow path.
- a second pressurizing chamber located upstream of the second discharge hole in the second individual flow path; A manifold that is commonly connected to the upstream side of the individual flow path and the upstream side of the second individual flow path.
- the first individual flow path has a first communication flow path that connects the first pressurizing chamber and the first discharge hole.
- the second individual flow path has a second communication flow path that connects the second pressurizing chamber and the second discharge hole.
- the second pressurizing chamber is located closer to the manifold than the first pressurizing chamber in plan view.
- the width of at least a portion of the second communicating channel is different from the width of the first communicating channel.
- FIG. 1 is a side view schematically showing a schematic side view of a printer according to an embodiment.
- FIG. 2 is a plan view schematically showing a schematic plane of the printer according to the embodiment.
- FIG. 3 is an exploded perspective view showing a schematic configuration of the liquid ejection head according to the embodiment.
- FIG. 4 is an enlarged plan view of the head main body according to the embodiment.
- FIG. 5 is a schematic cross-sectional view of the head main body according to the embodiment.
- FIG. 6 is an enlarged view of the area surrounded by the dashed line shown in FIG.
- FIG. 7 is a diagram illustrating variations in displacement between the first pressurizing chamber and the second pressurizing chamber.
- FIG. 8 is a diagram illustrating an example of the relationship between the width of the second communication channel and the discharge speed of the liquid discharged from the second discharge hole.
- FIG. 9 is a diagram showing a specific example of the hole diameter in the manifold plate.
- FIG. 10 is a schematic cross-sectional view of a head main body according to another embodiment 1.
- FIG. 11 is a schematic cross-sectional view of a head main body according to another embodiment 2.
- FIG. FIG. 12 is an enlarged plan view of a head main body according to another third embodiment.
- FIG. 1 is a side view schematically showing a schematic side view of a printer 1 according to an embodiment.
- FIG. 2 is a plan view schematically showing a schematic plane of the printer 1 according to the embodiment.
- the printer 1 includes a paper feed roller 2, a guide roller 3, a coating machine 4, a head case 5, a plurality of transport rollers 6, a plurality of frames 7, and a plurality of liquid ejection heads. 8, a conveyance roller 9, a dryer 10, a conveyance roller 11, a sensor section 12, and a collection roller 13.
- the printer 1 has a control section 14 that controls each section of the printer 1.
- the control unit 14 includes a paper feed roller 2, a guide roller 3, a coating machine 4, a head case 5, a plurality of transport rollers 6, a plurality of frames 7, a plurality of liquid ejection heads 8, a transport roller 9, a dryer 10, and a transport roller. 11. Controls the operation of the sensor section 12 and collection roller 13.
- the printer 1 records images and characters on the printing paper P by causing droplets to land on the printing paper P.
- the printing paper P is wound around the paper feed roller 2 in a removable state before use.
- the printer 1 transports printing paper P from a paper feed roller 2 through a guide roller 3 and a coater 4 into a head case 5 .
- the coating machine 4 uniformly applies the coating agent to the printing paper P. Thereby, since the printing paper P can be surface-treated, the printing quality of the printer 1 can be improved.
- the head case 5 accommodates a plurality of transport rollers 6, a plurality of frames 7, and a plurality of liquid ejection heads 8. Inside the head case 5, a space is formed that is isolated from the outside except for a portion where the printing paper P enters and exits and is connected to the outside.
- control unit 14 In the internal space of the head case 5, at least one of control factors such as temperature, humidity, and atmospheric pressure is controlled by the control unit 14 as necessary.
- the conveyance roller 6 conveys the printing paper P to the vicinity of the liquid ejection head 8 inside the head case 5 .
- the frame 7 is a rectangular flat plate, and is located close to above the printing paper P conveyed by the conveyance roller 6. Further, as shown in FIG. 2, a plurality of frames 7 (for example, four) are provided inside the head case 5, with the longitudinal direction perpendicular to the conveying direction of the printing paper P. Each of the plurality of frames 7 is arranged at predetermined intervals along the conveyance direction of the printing paper P.
- the conveyance direction of the printing paper P may be referred to as a "sub-scanning direction", and a direction perpendicular to the sub-scanning direction and parallel to the printing paper P may be referred to as a "main-scanning direction”.
- a liquid for example, ink
- the liquid ejection head 8 ejects the liquid supplied from the liquid tank.
- the control unit 14 controls the liquid ejection head 8 based on data such as images and characters, and causes the liquid to be ejected toward the printing paper P.
- the distance between the liquid ejection head 8 and the printing paper P is, for example, about 0.5 to 20 mm.
- the liquid ejection head 8 is fixed to the frame 7.
- the liquid ejection head 8 is fixed to the frame 7 at both ends in the longitudinal direction, for example.
- the liquid ejection head 8 is fixed to the frame 7 so that its longitudinal direction is parallel to the main scanning direction.
- the printer 1 according to the embodiment is a so-called line printer in which the liquid ejection head 8 is fixed inside the printer 1.
- the printer 1 according to the embodiment is not limited to a line printer, and may be a so-called serial printer.
- a serial printer is a printer that alternately records by moving the liquid ejection head 8 back and forth in a direction that intersects with the conveyance direction of the print paper P, for example, in a direction that is almost perpendicular to the conveyance direction, and transports the print paper P. This is a printer that uses the same method.
- one frame 7 is provided with a plurality of (for example, five) liquid ejection heads 8.
- FIG. 2 shows an example in which two liquid ejection heads 8 are arranged in the front and three liquid ejection heads 8 in the rear in the sub-scanning direction, and the centers of the liquid ejection heads 8 are arranged so that they do not overlap in the sub-scanning direction.
- a liquid ejection head 8 is arranged at.
- a plurality of liquid ejection heads 8 provided on one frame 7 constitute a head group 8A.
- the four head groups 8A are located along the sub-scanning direction. Ink of the same color is supplied to the liquid ejection heads 8 belonging to the same head group 8A. Thereby, the printer 1 can perform printing with four color inks using the four head groups 8A.
- the colors of ink ejected from each head group 8A are, for example, magenta (M), yellow (Y), cyan (C), and black (K).
- the control unit 14 can print a color image on the printing paper P by controlling each head group 8A to eject ink of a plurality of colors onto the printing paper P.
- a coating agent may be ejected onto the printing paper P from the liquid ejection head 8.
- the number of liquid ejection heads 8 included in one head group 8A and the number of head groups 8A mounted on the printer 1 can be changed as appropriate depending on the object to be printed and printing conditions. For example, if the printing paper P is printed in a single color and the printable range is printed with one liquid ejection head 8, the number of liquid ejection heads 8 installed in the printer 1 may be one. .
- the printing paper P that has been printed inside the head case 5 is transported to the outside of the head case 5 by transport rollers 9 and passes through the inside of the dryer 10.
- the dryer 10 dries the printed printing paper P.
- the printing paper P dried in the dryer 10 is transported by a transport roller 11 and collected by a collection roller 13.
- the printer 1 by drying the printing paper P in the dryer 10, it is possible to suppress adhesion of the printing paper P wound up overlappingly to each other and to prevent undried liquid from rubbing on the collection roller 13. can.
- the sensor section 12 is composed of a position sensor, a speed sensor, a temperature sensor, etc.
- the control section 14 can determine the status of each section of the printer 1 based on the information from the sensor section 12 and control each section of the printer 1.
- the printing target in the printer 1 is not limited to the printing paper P, and can also be printed on rolls of cloth, etc. You can also use it as
- the above-described printer 1 may be configured to transport the printing paper P by placing it on a transport belt instead of transporting it directly. By using the conveyor belt, the printer 1 can print on sheets of paper, cut cloth, wood, tiles, and the like.
- the above-described printer 1 may print a wiring pattern of an electronic device, etc. by ejecting a liquid containing conductive particles from the liquid ejection head 8.
- the printer 1 described above may produce a chemical agent by ejecting a predetermined amount of a liquid chemical agent or a liquid containing a chemical agent from the liquid ejecting head 8 toward a reaction container or the like.
- the above-described printer 1 may include a cleaning section that cleans the liquid ejection head 8.
- the cleaning section cleans the liquid ejection head 8 by, for example, wiping processing or capping processing.
- the wiping process is performed by, for example, using a flexible wiper to rub the surface of the part where the liquid is discharged, for example, the second surface 24b (see FIG. 3) of the flow path member 24 (see FIG. 3). This is a process to remove the liquid adhering to the second surface 24b.
- the part from which the liquid is ejected is covered with a cap and the liquid is repeatedly ejected to eliminate clogging of the first ejection hole 46 (see FIG. 5) and the second ejection hole 56 (see FIG. 5).
- This process is carried out as follows. First, a cap is placed so as to cover the portion from which liquid is to be discharged, for example, the second surface 24b of the channel member 24 (this is called capping). As a result, a substantially sealed space is formed between the second surface 24b and the cap. Next, the liquid is repeatedly discharged in the sealed space. As a result, it is possible to remove liquids and foreign substances that are clogged in the first discharge hole 46 and the second discharge hole 56 and have a higher viscosity than in the standard state.
- FIG. 3 is an exploded perspective view showing a schematic configuration of the liquid ejection head 8 according to the embodiment.
- the liquid ejection head 8 includes a head main body 20, a reservoir 21, an electrical board 22, and a head cover 23. Further, the head main body 20 includes a flow path member 24, a piezoelectric actuator substrate 25, a signal transmission section 26, and a drive IC 27.
- the flow path member 24 of the head body 20 has a substantially flat plate shape, and has a first surface 24a, which is one main surface, and a second surface 24b located on the opposite side of the first surface 24a.
- the first surface 24a has an opening 40a (see FIG. 4), and liquid is supplied from the reservoir 21 into the channel member 24 through the opening 40a.
- a plurality of first ejection holes 46 (see FIG. 4) and a plurality of second ejection holes 56 (see FIG. 4) that eject liquid onto the printing paper P are located on the second surface 24b.
- a channel is formed inside the channel member 24 to allow liquid to flow from the first surface 24a to the second surface 24b. Details of the flow path member 24 will be described later.
- the piezoelectric actuator substrate 25 is located on the first surface 24a of the flow path member 24.
- the piezoelectric actuator substrate 25 has a plurality of displacement elements 38 (see FIG. 5).
- the displacement element 38 is an example of a pressurizing section. Details of the piezoelectric actuator substrate 25 will be described later.
- Each signal transmission section 26 is electrically connected to the piezoelectric actuator board 25.
- Each signal transmission section 26 includes a plurality of drive ICs (Integrated Circuits) 27. Note that in FIG. 3, illustration of one of the signal transmission sections 26 is omitted for ease of understanding.
- the signal transmission section 26 supplies a signal to each displacement element 38 of the piezoelectric actuator substrate 25.
- the signal transmission section 26 is formed of, for example, an FPC (Flexible Printed Circuit).
- the drive IC 27 is mounted on the signal transmission section 26.
- the drive IC 27 controls the drive of each displacement element 38 on the piezoelectric actuator substrate 25.
- the head main body 20 has an ejection surface that ejects liquid and an opposite surface located on the opposite side of this ejection surface.
- the discharge surface will be described as the second surface 24b of the flow path member 24, and the opposite surface will be described as the first surface 24a of the flow path member 24.
- the reservoir 21 is located on the opposite side of the head body 20 and is in contact with the first surface 24a other than the piezoelectric actuator substrate 25.
- the reservoir 21 is provided with openings 21a at both ends in the main scanning direction.
- the reservoir 21 has a flow path inside, and liquid is supplied from the outside through the opening 21a.
- the reservoir 21 has a function of supplying liquid to the channel member 24 and a function of storing the supplied liquid.
- An electrical board 22 is provided upright on the surface of the reservoir 21 opposite to the head main body 20.
- a plurality of connectors 28 are located at the end of the electrical equipment board 22 on the reservoir 21 side. Each connector 28 accommodates an end portion of the signal transmission section 26 .
- a power supply connector 29 is located at the end of the electrical equipment board 22 opposite to the reservoir 21.
- the electrical equipment board 22 distributes the current supplied from the outside via the connector 29 to the connector 28, and supplies the current to the signal transmission section 26.
- the head cover 23 is located on the opposite side of the head body 20 and covers the signal transmission section 26 and the electrical equipment board 22. Thereby, the liquid ejection head 8 can seal the signal transmission section 26 and the electrical equipment board 22.
- the head cover 23 has an opening 23a.
- the connector 29 of the electrical equipment board 22 is inserted through the opening 23a so as to be exposed to the outside.
- a drive IC 27 is in contact with the inner side surface of the head cover 23.
- the drive IC 27 is pressed against the inner side surface of the head cover 23, for example. Thereby, the heat generated by the drive IC 27 can be radiated (radiated) from the contact portion on the side surface of the head cover 23.
- liquid ejection head 8 may further include members other than those shown in FIG. 3.
- FIG. 4 is an enlarged plan view of the head main body 20 according to the embodiment
- FIG. 5 is a schematic cross-sectional view of the head main body 20 according to the embodiment
- FIG. It is an enlarged view of the area.
- the head main body 20 includes a flow path member 24 and a piezoelectric actuator substrate 25.
- the flow path member 24 includes a supply manifold 40, a plurality of first pressurizing chambers 44, a plurality of second pressurizing chambers 54, a plurality of first discharge holes 46, and a plurality of second discharge holes 56. are doing.
- Supply manifold 40 is an example of a manifold.
- the plurality of first pressurizing chambers 44 and the plurality of second pressurizing chambers 54 are connected to the supply manifold 40.
- the plurality of first discharge holes 46 are connected to the plurality of first pressurizing chambers 44, respectively.
- the plurality of second discharge holes 56 are connected to the plurality of second pressurizing chambers 54, respectively.
- the first pressurizing chamber 44 and the second pressurizing chamber 54 are open to the first surface 24a (see FIG. 5) of the flow path member 24. Further, the first surface 24a of the flow path member 24 has an opening 40a connected to the supply manifold 40. Then, liquid is supplied from the reservoir 21 (see FIG. 2) into the flow path member 24 through the opening 40a.
- the head main body 20 has four supply manifolds 40 located inside the flow path member 24.
- the supply manifold 40 has an elongated shape extending along the longitudinal direction of the flow path member 24, and openings 40a of the supply manifold 40 are formed in the first surface 24a of the flow path member 24 at both ends thereof.
- a plurality of first pressurizing chambers 44 and a plurality of second pressurizing chambers 54 are formed in the flow path member 24 so as to extend two-dimensionally.
- the first pressurizing chamber 44 and the second pressurizing chamber 54 are hollow regions having a substantially rhombic planar shape with rounded corners.
- the first pressurizing chamber 44 and the second pressurizing chamber 54 are open to the first surface 24a of the flow path member 24, and are closed by joining the piezoelectric actuator substrate 25 to the first surface 24a.
- the first pressurizing chambers 44 constitute a first pressurizing chamber row arranged in the longitudinal direction of the flow path member 24 (supply manifold 40), and the second pressurizing chambers 54 constitute a row of first pressurizing chambers arranged in the longitudinal direction of the flow path member 24 (supply manifold 40). ) constitutes a second row of pressurizing chambers arranged in the longitudinal direction.
- the first pressurizing chambers 44 belonging to the first pressurizing chamber row and the second pressurizing chambers 54 belonging to the second pressurizing chamber row adjacent to the first pressurizing chamber row are arranged in a staggered manner. .
- Two rows of first pressurizing chambers and two rows of second pressurizing chambers connected to one supply manifold 40 constitute one pressurizing chamber group.
- the flow path member 24 has four such pressurizing chamber groups.
- each pressurizing chamber group is arranged slightly shifted in the longitudinal direction. There is.
- the first discharge hole 46 and the second discharge hole 56 are arranged at positions that avoid the area of the flow path member 24 that faces the supply manifold 40. That is, when the channel member 24 is seen through from the first surface 24a side, the first discharge hole 46 and the second discharge hole 56 do not overlap with the supply manifold 40.
- first discharge hole 46 and the second discharge hole 56 are arranged so as to fit within the mounting area of the piezoelectric actuator substrate 25. These first discharge holes 46 and second discharge holes 56 occupy an area having substantially the same size and shape as the piezoelectric actuator substrate 25 as one group.
- first connection channel 41 As shown in FIG. 5, between the supply manifold 40 and the first discharge hole 46, there are a first connection channel 41, a first throttle 42, a first supply channel 43, and a first pressurizing chamber 44. , and are connected to the first communication channel 45.
- the flow path member 24 has a first individual flow path C1 including a first connection flow path 41, a first throttle 42, a first supply flow path 43, a first pressurizing chamber 44, and a first communication flow path 45. are doing.
- the first connection flow path 41 is located near the supply manifold 40 and the first communication flow path 45 is located near between the first discharge holes 46 in the flow direction of the liquid.
- the first connection channel 41 extends in the first direction D1
- the first aperture 42 extends in a direction perpendicular to the first direction D1.
- the first supply channel 43 extends in the first direction D1.
- the first pressurizing chamber 44 extends in a direction perpendicular to the first direction D1
- the first communication channel 45 extends in the first direction D1.
- connection channel 51 between the supply manifold 40 and the second discharge hole 56, there is a second connection channel 51, a second throttle 52, a second supply channel 53, a second pressurizing chamber 54, and a second communication channel It is connected to a flow path 55.
- the flow path member 24 has a second individual flow path C2 including a second connection flow path 51, a second throttle 52, a second supply flow path 53, a second pressurizing chamber 54, and a second communication flow path 55. are doing.
- the second connection flow path 51 is located near the supply manifold 40
- the second communication flow path 55 is located near the second discharge hole 56 in the flow direction of the liquid.
- the second connection channel 51 extends in the first direction D1
- the second restrictor 52 extends in a direction perpendicular to the first direction D1
- the second supply channel 53 extends in the first direction D1.
- the second pressurizing chamber 54 extends in a direction perpendicular to the first direction D1
- the second communication channel 55 extends in the first direction D1.
- the first individual flow path C1 has a first aperture 42, which is narrower than other parts, on the upstream side of the first pressurizing chamber 44.
- the first aperture 42 has a higher flow resistance because it is narrower than other parts of the first individual flow path C1.
- the embodiment it is possible to suppress the pressure generated in the first pressurizing chamber 44 from escaping to the supply manifold 40 instead of the first discharge hole 46. Therefore, according to the embodiment, the liquid can be efficiently ejected from the first ejection hole 46.
- the second individual flow path C2 has a second aperture 52, which is narrower than other parts, on the upstream side of the second pressurizing chamber 54. Since the second aperture 52 has a narrower width than other parts of the second individual channel C2, the channel resistance is high.
- the embodiment it is possible to suppress the pressure generated in the second pressurizing chamber 54 from escaping to the supply manifold 40 instead of the second discharge hole 56. Therefore, according to the embodiment, the liquid can be efficiently ejected from the second ejection hole 56.
- the channel member 24 has a laminated structure in which a plurality of plates are laminated. These plates include, in order from the first surface 24a of the channel member 24, a cavity plate 24A, a base plate 24B, aperture plates 24C, 24D, a supply plate 24E, manifold plates 24F, 24G, 24H, a cover plate 24I, and a nozzle. This is plate 24J.
- FIG. 5 shows an example of the laminated structure of each plate according to the embodiment, and there is no need to be particularly limited to the example shown in FIG. 5.
- the manifold plates 24F, 24G, and 24H may be configured by stacking three or more plates.
- the cover plate 24I may be configured by laminating a plurality of plates.
- a large number of holes are formed in the plurality of plates constituting the flow path member 24, and by connecting the large number of holes, the supply manifold 40, the first individual flow path C1, and the second individual flow path C2 are formed as the flow path member. 24.
- the precision of the holes formed can be increased.
- the first individual channel C1 has a first communication channel 45 that connects the first pressurizing chamber 44 and the first discharge hole 46 on the downstream side of the first pressurizing chamber 44.
- the second individual flow path C2 has a second communication flow path 55 that connects the second pressurization chamber 54 and the second discharge hole 56 on the downstream side of the second pressurization chamber 54.
- the second pressurizing chamber 54 is located closer to the supply manifold 40 than the first pressurizing chamber 44 in plan view. That is, in the embodiment, the first pressurizing chamber 44 is relatively far from the supply manifold 40 and the second pressurizing chamber 54 is relatively close to the supply manifold 40 in plan view. In the example of FIG. 6, in plan view, the first pressurizing chamber 44 is located away from the supply manifold 40 and does not overlap with the supply manifold 40, but the second pressurizing chamber 54 overlaps with the supply manifold 40. It has a part.
- the width of the second communication channel 55 is different from the width of the first communication channel 45.
- the width of the second communication channel 55 is greater than the width of the first communication channel 45.
- the second pressurizing chamber 54 which is relatively close to the supply manifold 40, has lower rigidity than the first pressurizing chamber 44, which is relatively far from the supply manifold 40. Almost displaced by pressure.
- the liquid discharging speed between the first discharge hole 46 and the second discharge hole 56 varies. There may be variations.
- FIG. 7 is a diagram illustrating variations in the amount of displacement between the first pressurizing chamber 44 and the second pressurizing chamber 54.
- FIG. 7 shows the displacement amount of the first pressurizing chamber 44 belonging to the first pressurizing chamber row and the displacement amount of the second pressurizing chamber 54 belonging to the second pressurizing chamber row.
- the row numbers shown in FIG. 7 are numbers indicating the positions in the width direction of the flow path members 24 in the first pressurizing chamber row and the second pressurizing chamber row.
- the first pressurizing Numbers 1 to 16 are assigned as row numbers sequentially from the left side to the chamber row and the second pressurizing chamber row of row 8.
- Row numbers 1, 4, 5, 8, 9, 12, 13, and 16 correspond to the first pressurizing chamber row
- row numbers 2, 3, 6, 7, 10, 11, 14, and 15 correspond to the second pressurizing chamber row.
- the column numbers shown in FIG. 7 are numbers indicating the positions in the longitudinal direction of the flow path member 24 of the first pressurizing chamber 44 belonging to the first pressurizing chamber row and the second pressurizing chamber 54 belonging to the second pressurizing chamber row. It is.
- the second pressurizing chamber 54 which is relatively close to the supply manifold 40, has a larger displacement amount than the first pressurizing chamber 44, which is relatively farther from the supply manifold 40.
- the first pressurizing chamber 44 The liquid ejection speed is increased compared to the first ejection hole 46 connected to the first ejection hole 46 .
- the uniformity of the liquid ejection speed between the first ejection hole 46 and the second ejection hole 56 is impaired.
- FIG. 8 is a diagram illustrating an example of the relationship between the width of the second communication channel 55 and the discharge speed of the liquid discharged from the second discharge hole 56.
- the present inventors supplied liquid to the inside of the channel member 24 by changing the width (channel width) of the second communication channel 55, and simulated the discharge speed of the liquid discharged from the second discharge hole 56. Examined. FIG. 8 shows the results of such a simulation.
- the discharge speed of the liquid discharged from the second discharge hole 56 reaches its maximum value when the width of the second communication channel 55 is approximately 200 ⁇ m; It decreased from the maximum value when it was smaller or larger than about 200 ⁇ m. If the width of the second communication channel 55 is small, the flow resistance of the second communication channel 55 becomes high, and the pressure waves generated in the second pressurizing chamber 54 are not efficiently propagated to the second discharge hole 56. , it is thought that the liquid ejection speed decreases. Moreover, when the width of the second communication channel 55 is large, the pressure waves generated in the second pressurizing chamber 54 are absorbed by the liquid and attenuated, which is considered to reduce the discharge speed of the liquid. Although the explanation is omitted here, simulation results similar to those shown in FIG. 8 can be obtained with respect to the ejection speed of the liquid ejected from the first ejection hole 46 depending on the change in the width of the first communication channel 45.
- the width of the first communication channel 45 and the width of the second communication channel 55 generally correspond to the ejection speed of the liquid ejected from the ejection holes (the first ejection hole 46 and the second ejection hole 56). is set so that it becomes the maximum value.
- the width of the first communicating channel 45 and the width of the second communicating channel 55 are set to around 200 ⁇ m, which is a common set value at which the liquid ejection speed becomes the maximum value.
- the second discharge hole 56 has a higher temperature than the first discharge hole 46. This increases the liquid ejection speed. As a result, the uniformity of the liquid ejection speed between the first ejection hole 46 and the second ejection hole 56 is impaired.
- the discharge speed of the liquid discharged from the second discharge hole 56 is increased.
- the ejection speed is decreased so as to approach the ejection speed of the liquid ejected from 46. Therefore, according to the embodiment, the uniformity of the liquid ejection speed between the first ejection hole 46 and the second ejection hole 56 can be improved.
- the width of the second communication channel 55 is larger than the width of the first communication channel 45; however, the width of the second communication channel 55 is equal to the width of the first communication channel 45. May be smaller than . In short, it is sufficient that the width of the second communication channel 55 is different from the width of the first communication channel 45. Further, the entire width of the second communication channel 55 does not necessarily have to be different from the width of the first communication channel 45; for example, the width of a part of the second communication channel 55 may be different from the width of the first communication channel 45. The width of the other part of the second communication channel 55 may be the same as the width of the first communication channel 45. In short, it is sufficient that the width of at least a portion of the second communication channel 55 is different from the width of the first communication channel 45.
- the width of the second communication channel 55 is preferably 0.5 to 2.5% larger than the width of the first communication channel 45.
- the width of the second communicating channel 55 is preferably about 1 to 5 ⁇ m larger than the width of the first communicating channel 45.
- the diameter r2 of the hole for forming the second communication flow path 55 is the same as that for forming the first communication flow path 45. It is preferable that the diameter r1 of the hole is larger than that of the hole.
- FIG. 9 is a diagram showing a specific example of the hole diameter in the manifold plate 24H.
- FIG. 9 shows a diameter r1 of a hole for forming the first communication channel 45 and a diameter r2 of a hole for forming the second communication channel 55.
- the row numbers shown in FIG. 9 are numbers indicating the positions of the holes for forming the first communication channel 45 and the holes for forming the second communication channel 55 in the width direction of the channel member 24.
- the same numbers as the row numbers of the corresponding first pressurizing chamber row and second pressurizing chamber row are assigned to these holes as row numbers.
- Row numbers 1, 4, 5, 8, 9, 12, 13, 16 correspond to holes for forming the first communication channel 45
- row numbers 2, 3, 6, 7, 10, 11, 14 , 15 correspond to holes for forming the second communication channel 55.
- the diameter r2 of the hole for forming the second communication channel 55 is larger than the diameter r1 of the hole for forming the first communication channel 45.
- the diameter r2 of the hole for forming the second communication channel 55 is the same as the diameter of the hole for forming the first communication channel 45. greater than r1.
- the diameter r2 of the hole for forming the second communication channel 55 is larger than the diameter r1 of the hole for forming the first communication channel 45. Accordingly, by positioning and stacking the manifold plates 24F, 24G, and 24H so that their respective holes communicate with each other, the first communication channel 45 and the second communication channel 55 can be easily formed in the channel member 24. can be formed into
- each of the manifold plates 24F, 24G, and 24H is preferably thicker than the other plates included in the plurality of plates constituting the flow path member 24.
- each of manifold plates 24F, 24G, 24H is thicker than other plates, such as cavity plate 24A. Since each of the manifold plates 24F, 24G, and 24H is thicker than the other plates, the volume of the second communication channel 55 in the manifold plates 24F, 24G, and 24H is smaller than that of the second communication channel 55 in the other plate. It can be larger than the volume.
- the pressure waves generated in the second pressurizing chamber 54 are absorbed by the liquid in the second communication channel 55 in the manifold plates 24F, 24G, and 24H and are efficiently attenuated, so that the pressure wave is discharged from the second discharge hole. It is possible to widen the adjustment range of the liquid ejection speed. Therefore, according to the embodiment, the uniformity of the liquid ejection speed between the first ejection hole 46 and the second ejection hole 56 can be further improved.
- the diameter r2 of the hole for forming the second communication channel 55 is the same as that of the first communication channel. It is preferable that the diameter r1 of the hole for forming the hole 45 is larger than the diameter r1.
- the diameter r2 of the hole for forming the second communication channel 55 is the same as that for forming the first communication channel 45. It is larger than the diameter r1 of the hole for.
- the pressure waves generated in the second pressurizing chamber 54 are absorbed by the liquid in the second communication channel 55 in the manifold plates 24F, 24G, 24H and other plates and are efficiently attenuated.
- the adjustment range of the discharge speed of the liquid discharged from the hole 56 can be widened. Therefore, according to the embodiment, the uniformity of the liquid ejection speed between the first ejection hole 46 and the second ejection hole 56 can be further improved.
- the piezoelectric actuator substrate 25 includes piezoelectric ceramic layers 25A and 25B, a common electrode 33, an individual electrode 34, a connection electrode 35, a dummy electrode 36, and a surface electrode 37 (see FIG. 4). have.
- the piezoelectric ceramic layer 25B, the common electrode 33, the piezoelectric ceramic layer 25A, and the individual electrodes 34 are laminated in this order.
- the piezoelectric ceramic layers 25A and 25B both extend so as to straddle the plurality of first pressurizing chambers 44 and second pressurizing chambers 54.
- the piezoelectric ceramic layers 25A and 25B each have a thickness of about 20 ⁇ m.
- the piezoelectric ceramic layers 25A and 25B are made of, for example, a lead zirconate titanate (PZT) ceramic material having ferroelectric properties.
- the common electrode 33 is formed over almost the entire surface in the region between the piezoelectric ceramic layer 25A and the piezoelectric ceramic layer 25B. That is, the common electrode 33 overlaps all the first pressurizing chambers 44 and the second pressurizing chambers 54 in the area facing the piezoelectric actuator substrate 25.
- the thickness of the common electrode 33 is about 2 ⁇ m.
- the common electrode 33 is made of, for example, a metal material such as Ag--Pd.
- the individual electrode 34 has a main body electrode 34a and an extraction electrode 34b.
- the main body electrode 34a is located on the piezoelectric ceramic layer 25A in a region facing the first pressurizing chamber 44 and the second pressurizing chamber 54.
- the main body electrode 34a is one size smaller than the first pressurizing chamber 44 and the second pressurizing chamber 54, and has a shape substantially similar to the first pressurizing chamber 44 and the second pressurizing chamber 54.
- the extraction electrode 34b is extracted from the main body electrode 34a to the outside of the area facing the first pressurizing chamber 44 and the second pressurizing chamber 54.
- the individual electrodes 34 are made of, for example, a metal material such as Au-based material.
- connection electrode 35 is located on the extraction electrode 34b, has a thickness of about 15 ⁇ m, and is formed in a convex shape. Furthermore, the connection electrode 35 is electrically connected to an electrode provided in the signal transmission section 26 (see FIG. 3).
- the connection electrode 35 is made of, for example, silver-palladium containing glass frit.
- the dummy electrode 36 is located on the piezoelectric ceramic layer 25A, and is located so as not to overlap with various electrodes such as the individual electrodes 34.
- the dummy electrode 36 connects the piezoelectric actuator substrate 25 and the signal transmission section 26 to increase the strength of the connection.
- the dummy electrode 36 equalizes the distribution of contact positions between the piezoelectric actuator substrate 25 and the signal transmission section 26, and stabilizes the electrical connection.
- the dummy electrode 36 may be made of the same material as the connection electrode 35, and may be formed in the same process as the connection electrode 35.
- the surface electrode 37 shown in FIG. 4 is formed on the piezoelectric ceramic layer 25A at a position avoiding the individual electrodes 34.
- the surface electrode 37 is connected to the common electrode 33 via a via hole formed in the piezoelectric ceramic layer 25A.
- the surface electrode 37 is grounded and held at the ground potential.
- the surface electrode 37 is preferably made of the same material as the individual electrode 34, and preferably formed in the same process as the individual electrode 34.
- the plurality of individual electrodes 34 are each individually electrically connected to the control unit 14 (see FIG. 1) via the signal transmission unit 26 and wiring in order to individually control the potential. Then, when the individual electrodes 34 and the common electrode 33 are set at different potentials and an electric field is applied in the polarization direction of the piezoelectric ceramic layer 25A, the portion of the piezoelectric ceramic layer 25A to which the electric field is applied becomes an active region that is distorted due to the piezoelectric effect. It works as.
- the portions of the individual electrodes 34, the piezoelectric ceramic layers 25A and 25B, and the common electrode 33 that face the first pressurizing chamber 44 and the second pressurizing chamber 54 function as the displacement element 38.
- the first pressurizing chamber 44 and the second pressurizing chamber 54 are pressed, and liquid is ejected from the first discharge hole 46 and the second discharge hole 56.
- the individual electrodes 34 are set in advance to a higher potential than the common electrode 33 (hereinafter also referred to as high potential). Then, the control unit 14 once sets the individual electrode 34 to the same potential as the common electrode 33 (hereinafter also referred to as low potential) each time there is a discharge request, and then sets the individual electrode 34 to a high potential again at a predetermined timing.
- the piezoelectric ceramic layers 25A and 25B return to their original shapes at the timing when the individual electrode 34 becomes low potential, and the volumes of the first pressurizing chamber 44 and the second pressurizing chamber 54 are reduced to the initial state, that is, the high potential. increase than the state.
- the piezoelectric ceramic layers 25A and 25B deform to protrude toward the first pressurizing chamber 44 and the second pressurizing chamber 54 side.
- the pressures in the first pressurizing chamber 44 and the second pressurizing chamber 54 become positive pressures.
- the pressure of the liquid inside the first pressurizing chamber 44 and the second pressurizing chamber 54 increases, and droplets are ejected from the first ejection hole 46 and the second ejection hole 56.
- control unit 14 supplies a drive signal including a pulse based on a high potential to the individual electrodes 34 in order to cause droplets to be ejected from the first ejection hole 46 and the second ejection hole 56.
- This pulse width is equal to AL (Acoustic Length), which is the length of time that the pressure wave propagates from the first connection flow path 41 to the first discharge hole 46 (or from the second connection flow path 51 to the second discharge hole 56). do it.
- the gradation is determined by the number of droplets continuously ejected from the first ejection hole 46 and the second ejection hole 56, that is, the amount (volume) of droplets adjusted by the number of droplet ejections. Expression takes place. Therefore, droplets are ejected a number of times corresponding to the specified gradation expression continuously from the first ejection hole 46 and the second ejection hole 56 corresponding to the specified dot area.
- the interval between pulses supplied to eject droplets may be set to AL.
- the period of the residual pressure wave of the pressure generated when ejecting the droplet that was ejected first matches the period of the pressure wave of the pressure that occurs when ejecting the droplet that is ejected later.
- the residual pressure wave and the pressure wave can be superimposed to amplify the pressure for ejecting the droplet. Note that in this case, the speed of the droplets ejected later becomes faster, and the landing points of the plurality of droplets become closer.
- FIG. 10 is a schematic cross-sectional view of a head main body 20 according to another embodiment 1.
- FIG. 10 is a schematic cross-sectional view of a head main body 20 according to another embodiment 1.
- At least one of the manifold plates 24F, 24G, and 24H and the other manifold plates have holes for forming the second communication channel 55.
- Different diameters For example, the diameter r21 of the hole for forming the second communication passage 55 of the manifold plates 24F, 24G is larger than the diameter r22 of the hole for forming the second communication passage 55 of the manifold plate 24H.
- the volume of the second communication channel 55 in the manifold plates 24F, 24G, and 24H can be finely adjusted, so that the adjustment range of the discharge speed of the liquid discharged from the second discharge hole 56 can be widened. Therefore, according to another embodiment 1, the uniformity of the liquid ejection speed between the first ejection hole 46 and the second ejection hole 56 can be further improved.
- the central axes of the holes (holes for forming the second communication flow path 55) of the manifold plates 24F, 24G, and 24H are aligned.
- the central axis of the hole in the second communication flow path 55 is liquid can flow along. Therefore, according to another embodiment 1, it is possible to suppress disturbances in the flow of liquid within the second communication channel 55.
- FIG. 11 is a schematic cross-sectional view of a head main body 20 according to another embodiment 2.
- the manifold plates 24F, 24G, and 24H have different hole diameters for forming the second communication channel 55.
- the volume of the second communication channel 55 in the manifold plates 24F, 24G, and 24H can be finely adjusted, so that the adjustment range of the discharge speed of the liquid discharged from the second discharge hole 56 can be widened. Therefore, according to another embodiment 2, the uniformity of the liquid ejection speed between the first ejection hole 46 and the second ejection hole 56 can be further improved.
- the diameter of the holes (holes for forming the second communication flow path 55) that the manifold plates 24F, 24G, and 24H have is the same as the diameter of the hole (the hole for forming the second communication flow path 55) in the first direction D1.
- the position of the hole (for forming the hole) becomes smaller as it approaches the second surface 24b. That is, the diameter r22 of the hole in the manifold plate 24G is smaller than the diameter r21 of the hole in the manifold plate 24F, and the diameter r23 of the hole in the manifold plate 24H is smaller than the diameter r22 of the hole in the manifold plate 24G.
- the volume of the second communication channel 55 in the manifold plates 24F, 24G, and 24H can be gradually reduced toward the downstream side of the liquid, so that the flow rate of the liquid in the second communication channel 55 can be reduced to a second level. It can be made larger as it approaches the discharge hole 56. Therefore, according to another embodiment 2, the discharge of air and foreign matter from the second discharge hole 56 can be promoted.
- the central axes of the holes (holes for forming the second communication channel 55) of the manifold plates 24F, 24G, and 24H are aligned. There is. Therefore, according to the second embodiment, as in the first embodiment, disturbances in the flow of the liquid in the second communication channel 55 can be suppressed.
- FIG. 12 is an enlarged plan view of a head main body 20 according to another third embodiment.
- the position of the first pressurizing chamber 44 is different from the embodiment. Specifically, in plan view, the first pressurizing chamber 44 is located closer to the supply manifold 40 as a whole than in the embodiment, and has a portion that overlaps with the supply manifold 40.
- the area of the portion of the first pressurizing chamber 44 that overlaps with the supply manifold 40 is smaller than the area of the portion of the second pressurizing chamber 54 that overlaps with the supply manifold 40 in plan view.
- the first pressurizing chamber 44 and the second pressurizing chamber 54 can be arranged within the flow path member 24 with good space efficiency. Therefore, according to another embodiment 3, since the flow path member 24 can be made smaller, the head main body 20 can be made smaller.
- the present disclosure is not limited to the above embodiments, and various changes can be made without departing from the spirit thereof.
- the channel member 24 is composed of a plurality of stacked plates, but the channel member 24 is not limited to a case where the channel member 24 is composed of a plurality of stacked plates. .
- the flow path member 24 may be configured by forming the supply manifold 40, the first individual flow path C1, the second individual flow path C2, etc. by etching.
- the liquid ejection head (for example, the liquid ejection head 8) according to the embodiment has a first surface (for example, the first surface 24a) and a second surface located on the opposite side of the first surface (for example, the first surface 24a). 24b), and a pressurizing section (eg, displacement element 38) located on the first surface.
- the flow path member includes a first discharge hole (for example, the first discharge hole 46) and a second discharge hole (for example, the second discharge hole 56) located on the second surface, and a first individual flow connected to the first discharge hole.
- the first individual flow path has a first communication flow path (for example, the first communication flow path 45) that connects the first pressurizing chamber and the first discharge hole.
- the second individual flow path has a second communication flow path (for example, the second communication flow path 55) that connects the second pressurizing chamber and the second discharge hole.
- the second pressurizing chamber is located closer to the manifold than the first pressurizing chamber in plan view.
- the width of at least a portion of the second communicating channel is different from the width of the first communicating channel.
- the width of at least a portion of the second communication channel may be larger than the width of the first communication channel.
- the width of at least a portion of the second communicating channel may be 0.5 to 2.5% larger than the width of the first communicating channel.
- the flow path member may have a laminated structure in which a plurality of plates are laminated.
- the plurality of plates may include a plurality of manifold plates (eg, manifold plates 24F, 24G, 24H) each having a plurality of holes for forming a manifold, a first communication channel, and a second communication channel.
- the diameter of the hole for forming the second communication channel (for example, diameter r2) is larger than the diameter of the hole for forming the first communication channel (for example, diameter r1). It can be large.
- the liquid ejection head by positioning and stacking the plurality of manifold plates so that the respective holes communicate with each other, the first communication flow path and the second communication flow path are formed in the flow path member.
- a connecting channel can be easily formed.
- each of the plurality of manifold plates may be thicker than other plates included in the plurality of plates.
- the pressure waves generated in the second pressure chamber are absorbed by the liquid in the second communication channels in the plurality of manifold plates and are efficiently attenuated.
- the adjustment range of the ejection speed of the liquid ejected from the ejection hole can be widened.
- At least one manifold plate among the plurality of manifold plates and the other manifold plates may have different diameters of holes for forming the second communication channel.
- the plurality of manifold plates may have different diameters of holes for forming the second communication channel.
- the diameter of the hole of the plurality of manifold plates is such that the position of the hole in the first direction is the same as that of the second surface. The closer it gets to , the smaller it may be.
- the central axes of the holes of the plurality of manifold plates may be the same.
- the plurality of plates are other plates different from the plurality of manifold plates and have a plurality of holes for forming the first communication channel and the second communication channel (for example, the base plate 24B). , aperture plates 24C, 24D, supply plate 24E, and cover plate 24I).
- the diameter of the hole for forming the second communication channel may be larger than the diameter of the hole for forming the first communication channel.
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
図1および図2を用いて、実施形態に係る記録装置の一例であるプリンタ1の概要について説明する。図1は、実施形態に係るプリンタ1の概略的な側面を模式的に示す側面図である。図2は、実施形態に係るプリンタ1の概略的な平面を模式的に示す平面図である。
図3は、実施形態に係る液体吐出ヘッド8の概略構成を示す分解斜視図である。
次に、図4~図6を参照して実施形態に係るヘッド本体20の構成について説明する。図4は、実施形態に係るヘッド本体20の拡大平面図であり、図5は、実施形態に係るヘッド本体20の概略断面図であり、図6は、図4に示す一点鎖線に囲まれた領域の拡大図である。
実施形態に係るヘッド本体20の各種別の実施形態について、図10~図12を参照しながら説明する。図10は、別の実施形態1に係るヘッド本体20の概略断面図である。
8 液体吐出ヘッド
14 制御部
20 ヘッド本体
24 流路部材
24A キャビティプレート
24B ベースプレート
24C,24D アパチャープレート
24E サプライプレート
24F,24G,24H マニホールドプレート
24I カバープレート
24J ノズルプレート
25 圧電アクチュエータ基板
38 変位素子
40 供給マニホールド
41 第1接続流路
42 第1しぼり
43 第1供給流路
44 第1加圧室
45 第1連絡流路
46 第1吐出孔
51 第2接続流路
52 第2しぼり
53 第2供給流路
54 第2加圧室
55 第2連絡流路
56 第2吐出孔
C1 第1個別流路
C2 第2個別流路
D1 第1方向
Claims (11)
- 第1面および前記第1面の反対側に位置する第2面を有する流路部材と、
前記第1面上に位置する加圧部と、
を備え、
前記流路部材は、
前記第2面に位置する第1吐出孔および第2吐出孔と、
前記第1吐出孔に繋がる第1個別流路と、
前記第1個別流路内において前記第1吐出孔よりも上流側に位置する第1加圧室と、
前記第2吐出孔に繋がる第2個別流路と、
前記第2個別流路内において前記第2吐出孔よりも上流側に位置する第2加圧室と、
前記第1個別流路の上流側および前記第2個別流路の上流側に共通に繋がるマニホールドと、
を有し、
前記第1個別流路は、前記第1加圧室と前記第1吐出孔とを繋ぐ第1連絡流路を有し、
前記第2個別流路は、前記第2加圧室と前記第2吐出孔とを繋ぐ第2連絡流路を有し、
前記第2加圧室は、平面視において、前記第1加圧室よりも前記マニホールドの近くに位置し、
前記第2連絡流路の少なくとも一部の幅は、前記第1連絡流路の幅と異なる、液体吐出ヘッド。 - 前記第2連絡流路の少なくとも一部の幅は、前記第1連絡流路の幅よりも大きい、請求項1に記載の液体吐出ヘッド。
- 前記第2連絡流路の少なくとも一部の幅は、前記第1連絡流路の幅よりも0.5~2.5%大きい、請求項2に記載の液体吐出ヘッド。
- 前記流路部材は、複数のプレートが積層された積層構造を有し、
前記複数のプレートは、各々が前記マニホールド、前記第1連絡流路および前記第2連絡流路を形成するための複数の孔を有する複数のマニホールドプレートを含み、
前記複数のマニホールドプレートの各々において、前記第2連絡流路を形成するための孔の径は、前記第1連絡流路を形成するための孔の径よりも大きい、請求項2または3に記載の液体吐出ヘッド。 - 前記複数のマニホールドプレートの各々の厚さは、前記複数のプレートに含まれる他のプレートよりも厚い、請求項4に記載の液体吐出ヘッド。
- 前記複数のマニホールドプレートのうち少なくとも1枚のマニホールドプレートと他のマニホールドプレートとは、前記第2連絡流路を形成するための孔の径が異なる、請求項4または5に記載の液体吐出ヘッド。
- 前記複数のマニホールドプレートは、前記第2連絡流路を形成するための孔の径が互いに異なる、請求項4または5に記載の液体吐出ヘッド。
- 前記第1面から前記第2面に向かう方向を第1方向としたとき、
前記複数のマニホールドプレートが有する前記孔の径は、前記第1方向における前記孔の位置が前記第2面に近づくほど、小さくなる、請求項7に記載の液体吐出ヘッド。 - 前記複数のマニホールドプレートが有する前記孔の中心軸は、一致している、請求項6~8のいずれか一つに記載の液体吐出ヘッド。
- 前記複数のプレートは、前記複数のマニホールドプレートとは異なる他のプレートであって、前記第1連絡流路および前記第2連絡流路を形成するための複数の孔を有する他のプレートを含み、
前記複数のマニホールドプレートの各々および前記他のプレートにおいて、前記第2連絡流路を形成するための孔の径は、前記第1連絡流路を形成するための孔の径よりも大きい、請求項4に記載の液体吐出ヘッド。 - 請求項1~10のいずれか一つに記載の液体吐出ヘッドを備える記録装置。
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CN202380027778.9A CN118871297A (zh) | 2022-03-29 | 2023-03-24 | 液体喷出头以及记录装置 |
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Citations (4)
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JP2005035291A (ja) | 2003-06-30 | 2005-02-10 | Brother Ind Ltd | インクジェットヘッド |
JP2019010758A (ja) * | 2017-06-29 | 2019-01-24 | キヤノン株式会社 | 液体吐出ヘッドおよび液体吐出装置 |
JP2020138433A (ja) * | 2019-02-28 | 2020-09-03 | 京セラ株式会社 | 液体吐出ヘッド及び記録装置 |
JP2020168811A (ja) * | 2019-04-04 | 2020-10-15 | ブラザー工業株式会社 | 液体吐出ヘッド |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2005035291A (ja) | 2003-06-30 | 2005-02-10 | Brother Ind Ltd | インクジェットヘッド |
JP2019010758A (ja) * | 2017-06-29 | 2019-01-24 | キヤノン株式会社 | 液体吐出ヘッドおよび液体吐出装置 |
JP2020138433A (ja) * | 2019-02-28 | 2020-09-03 | 京セラ株式会社 | 液体吐出ヘッド及び記録装置 |
JP2020168811A (ja) * | 2019-04-04 | 2020-10-15 | ブラザー工業株式会社 | 液体吐出ヘッド |
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