WO2012086520A1 - インクジェットヘッドユニット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ユニット及びインクジェット記録装置 Download PDFInfo
- Publication number
- WO2012086520A1 WO2012086520A1 PCT/JP2011/079070 JP2011079070W WO2012086520A1 WO 2012086520 A1 WO2012086520 A1 WO 2012086520A1 JP 2011079070 W JP2011079070 W JP 2011079070W WO 2012086520 A1 WO2012086520 A1 WO 2012086520A1
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- WIPO (PCT)
- Prior art keywords
- head unit
- unit base
- head
- chip
- head chip
- 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
- B41J2/145—Arrangement thereof
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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
- B41J2/145—Arrangement thereof
- B41J2/155—Arrangement thereof for line printing
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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
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/34—Bodily-changeable print heads or carriages
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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
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J2025/008—Actions or mechanisms not otherwise provided for comprising a plurality of print heads placed around a drum
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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
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/19—Assembling head units
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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
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/20—Modules
Definitions
- the present invention relates to an inkjet head unit in which a plurality of head chips are arranged on a common head unit base, and an inkjet recording apparatus including the inkjet head unit.
- Ink jet heads that perform recording by ejecting liquid droplets from nozzles are very difficult to obtain uniform ejection characteristics in the width direction when the nozzle row is elongated in order to obtain a desired recording width.
- the nozzles are arranged over a desired recording width as a whole by using a large number of individually manufactured narrow head chips and staggering them on a common head unit base.
- An ink jet head unit configured as described above is manufactured (Patent Documents 1 and 2).
- 17 (a) and 17 (b) show a conventional inkjet head unit 100 in which four head chips are arranged in a staggered manner in two rows on a head unit base.
- (A) is the side view which shows a head unit base in a cross section
- (b) is the top view seen from the opposite side of the nozzle surface.
- the head chip 200 is inserted from the nozzle surface 201 side into each of four mounting openings 301 formed in a common head unit base 300 formed in a flat plate shape by a material such as SUS, and the head chip 200 is laterally moved from each head chip 200.
- the mounting flanges 202 formed so as to project from each other are in contact with and fixed to the upper surface side of the edge of the mounting opening 301, so that they are arranged in a plane with respect to the head unit base 300.
- each head chip 200 On the nozzle surface 201 of each head chip 200, for example, a large number of nozzles of 1200 npi (nozzle per inch) are arranged in an array, and when viewed from the direction along the X direction in the figure, the nozzle surface 201 covers all the head chips 200. Thus, each head chip 200 is positioned on the head unit base 300 so that the nozzle pitch is equal along the Y direction in the figure.
- 203 is an ink manifold
- 204 is an external wiring member (FPC).
- the external wiring members 204 are respectively connected to the side surfaces of the mounting flange 202 opposite to the head unit base 300.
- the head chip 200 is inserted into the mounting opening 301 of the head unit base 300 from the ink manifold 203 side, and each mounting flange 202 is located at the edge of the mounting opening 301.
- the head unit base 300 is arranged in a plane by contacting and fixing to the lower surface side. 17, the nozzle surface 201 and the head unit base 300 are disposed on the same side with respect to the mounting flange portion 202 of each head chip 200, so that the nozzle surface 201 is wound around the drum surface 401.
- the head unit base 300 In order to make the head unit base 300 thin as much as possible as close as possible to the recording surface of the recording medium (not shown) held, there is a problem of strength reduction. Since the nozzle surface 201 of the head chip 200 and the head unit base 300 are disposed on the opposite side across the portion 202, the head unit base 300 can be thickened to ensure sufficient strength.
- the external wiring member 204 is located between each mounting flange 202 and the head unit base 300, and the external wiring member 204 located inside passes through the wiring lead-out hole 302 formed in the head unit base 300. It is drawn out to the surface opposite to the nozzle surface 201.
- the X direction of the ink jet head unit 100 in the drawing is It arrange
- the drum surface 401 of the rotary drum 400 is a curved surface.
- a distance D1 between the nozzle located on the center side of the head unit base 300 and the curved recording surface (surface) of a recording medium (not shown) wound around the drum surface 401 and the head unit base The distance D2 between the nozzles located on both end sides along the circumferential direction of the 200 drum 400 and the curved recording surface of the recording medium wound around the drum surface 401 is D1 ⁇ D2.
- the time until the ink droplet landing on the recording surface of the recording medium is widened is the time of the nozzle along the rotation direction of the rotary drum 400. It will differ greatly depending on location.
- the height position of the head unit base 300 with respect to the recording surface of the recording medium on the drum surface 401 is the shortest distance D1 between the nozzle surface 201 and the recording surface of the recording medium on the drum surface 401. Since the distance D2 is set to be the longest compared to the appropriate distance D1, the ink droplets fly over the long distance D2 and the following new distance is set. A problem has arisen.
- FIG. 19 is a graph showing the relationship between the gap amount (distance between the nozzle surface and the recording surface of the recording medium) and the landing accuracy.
- the nozzle surface and the recording surface are both immovable, the point where the recording surface intersects with the straight line drawn vertically from a specific nozzle is the appropriate landing position, and the distance between the nozzle surface and the recording surface This was performed by measuring the landing position coordinates with respect to the appropriate landing position when increasing the value with a non-contact three-dimensional measuring machine.
- the landing accuracy deteriorates (the landing error increases) as the gap amount increases. This is because, as the distance between the nozzle and the recording surface increases, the flying distance of the ink droplet becomes longer, so that it becomes more susceptible to the influence of the air current (such as the influence of the air current generated by the rotation of the rotating drum 400). This is because disturbance occurs in the direction.
- Patent Document 3 it is described that the nozzle plate is formed into a curved surface so as to form a part of a cylindrical shape.
- the distance between the surface of the cylindrical rotary drum and each nozzle can be made substantially constant, but it is not possible to precisely curve the nozzle plate so that it matches the surface of the rotary drum.
- Patent Document 4 describes that the tilt of the head chip with respect to the recording medium is adjusted using a piezoelectric actuator.
- a piezoelectric actuator for tilt adjustment for each head chip not only complicates the structure of the inkjet head unit but makes it difficult to manufacture, and also increases the manufacturing cost.
- the present invention has been made in view of the above-described problems of the prior art, and reduces the difference in the distance of each nozzle from the curved recording surface without forming the nozzle plate or the head unit base into a curved shape. It is an object of the present invention to provide an inkjet head unit that can be used and an inkjet recording apparatus using the inkjet head unit.
- a plurality of nozzles are arranged on the nozzle surface, a head chip capable of ejecting ink by a pressure generating means independent from a pressure chamber communicating with each of the plurality of nozzles, and a plurality of the head chips are arranged and held.
- a head chip capable of ejecting ink by a pressure generating means independent from a pressure chamber communicating with each of the plurality of nozzles, and a plurality of the head chips are arranged and held.
- an inkjet head unit having a possible flat head unit base, Of the contact surfaces for contact between the head unit base and the head chip, at least one of the contact surface on the head unit base side and the contact surface on the head chip side is formed in a step shape. The height of the contact surface of the head chip with respect to the surface of the head unit base is partially different, so that the head chip is attached to be inclined with respect to the surface of the head unit base. Inkjet head unit.
- the head unit base has a mounting opening for the head chip, Each of the head chips has attachment flanges projecting to opposite sides, and the head chip is attached to the head unit base by contacting each of the attachment flanges and the opposite edge of the attachment opening. And at least one of the contact surfaces of the attachment flange portion and the edge portion is formed in a step shape, and the height of the contact surface of the head chip with respect to the surface of the head unit base is partially 2.
- each of the mounting flanges comes into contact with the head unit base from a surface side opposite to the ink discharge direction in the head unit base, and one of the mounting flanges is recessed in a step shape.
- each of the mounting flanges is in contact with the head unit base from the surface of the head unit base in the ink discharge direction, and one of the mounting flanges is recessed in a step shape.
- one of the edge portions of the mounting opening is recessed in a step shape with a predetermined depth from the surface side of the head unit base in the ink ejection direction, and the other The edge portion is recessed in a step shape at a predetermined depth from the side opposite to the ink discharge direction in the head unit base,
- one of the mounting flanges is in contact with the head unit base from the surface side of the head unit base in the ink discharge direction and has a predetermined depth from the surface side of the head unit base in the ink discharge direction.
- the head unit base is attached at an angle to the surface of the head unit base by abutting against the edge portion recessed in a step shape at a predetermined depth from the side opposite to the ink ejection direction. 3.
- Each of the head chips has an external wiring member connected to the mounting flange, The external wiring member connected to the mounting flange that is formed in the vicinity of the edge portion that is recessed from the surface side in the ink discharge direction of the head unit base, and is connected to the attachment flange that contacts the edge portion.
- the head unit base is made of SUS, and is recessed in a step shape at a predetermined depth by at least one of milling, blasting, and etching. It is an inkjet head unit in any one.
- the head unit base has a mounting opening for the head chip,
- the head chip is formed of a plurality of layers, and among the plurality of layers, the widths of the plurality of layers are different so that different layers abut against the opposing edge portions of the mounting opening.
- a contact surface with the edge portion is formed.
- a rotating drum capable of rotating while holding a recording medium on a curved surface;
- a plurality of the head chips are arranged along the circumferential direction of the rotating drum, and the nozzle surfaces of the head chips are respectively close to the recording surface of the recording medium held on the surface of the rotating drum.
- the inkjet head unit according to any one of 1 to 12, wherein the inkjet head unit is disposed and performs drawing by discharging ink from the nozzle toward the recording surface of the recording medium,
- the plurality of head chips arranged in the circumferential direction of the rotary drum is characterized in that a perpendicular to the center of each nozzle surface coincides with the rotation center of the rotary drum.
- the difference in the distance of each nozzle to the curved recording surface can be reduced without forming the nozzle plate and the head unit base in a curved shape.
- FIG. 1 It is a figure which shows an example of the inkjet head unit which concerns on this invention, and is the top view seen from the surface on the opposite side to the nozzle surface of a head chip
- Sectional drawing which shows another aspect which inclines a head chip with respect to the surface of a head unit base.
- Schematic showing an example of an inkjet recording apparatus according to the present invention The figure explaining the conventional inkjet head unit
- the figure explaining the other aspect of the conventional inkjet head unit Graph showing the relationship between gap amount and landing accuracy
- An inkjet head unit includes a head chip in which a plurality of nozzles are arranged on a nozzle surface and ink can be ejected by pressure generating means independent from pressure chambers communicating with each of the plurality of nozzles; A flat head unit base that can hold a plurality of the head chips.
- Each of the plurality of head chips has a contact surface on the head unit base side and a contact surface on the head chip side out of contact surfaces on which the head unit base and the head chip contact when arranged and held on the head unit base.
- the contact surface of at least one of the contact surfaces is formed in a stepped shape, and the height of the contact surface of the head chip with respect to the surface of the head unit base is partially varied, so that the head chip is attached to the surface of the head unit base. Install with an inclination.
- the step shape is a state in which the thickness of the part constituting the contact surface is thinner or thicker than the thickness of the other part, and the contact surface has a surface parallel to the surface of the other part. It is a shape.
- the contact surface between the head unit base and the head chip is formed in a stepped shape, and the height of the contact surface of the head chip with respect to the surface of the head unit base is partially varied, so that the head chip
- the nozzle surface is inclined with respect to the surface of the unit base.
- the inclination angle of the head chip can be easily adjusted by adjusting the thinness (thickness) when the contact surface is formed in steps.
- the head unit base has a head chip mounting opening
- a part of the head chip can be mounted so as to be inserted into the mounting opening.
- the head chip has mounting flanges projecting to opposite sides, and the mounting flange contacts the opposite edge portions of the mounting opening of the head unit base, thereby the head unit base. Attached to.
- the surface where the edge of the mounting opening of the head unit base and the mounting flange of the head chip face each other is a contact surface, at least one of these edge or mounting flange One of the two attachment flanges that are contact surfaces and are formed in a step shape in the opposite edge portions at the edge portion, and project in opposite directions at the attachment flange portion.
- the material of the head unit base can be glass.
- the contact surface between the head unit base and the head chip when it is formed in a step shape, it can be performed by forming a step shape with a predetermined depth from the surface by blasting.
- a stepped recess having a desired depth can be easily formed with high accuracy by blasting the glass substrate.
- the material of the head unit base can be Si (silicon).
- Si silicon
- the contact surface between the head unit base and the head chip when the contact surface between the head unit base and the head chip is formed in a stepped shape, it can be formed by recessing in a stepped shape with a predetermined depth from the surface by etching with respect to Si.
- an RIE (Reactive Ion Etching) method can be preferably used.
- a stepped concave portion having a desired depth can be easily formed with high accuracy by etching the Si substrate.
- the material of the head unit base can be SUS (stainless steel).
- SUS stainless steel
- the contact surface between the head unit base and the head chip is formed in a stepped shape, at least one of milling, blasting, and etching is used for SUS, so that a predetermined surface is formed. This can be done by recessing in steps with depth. Also by any of the above-described processing on the SUS substrate, a stepped recessed portion having a desired depth can be easily formed with high accuracy.
- the aspect in which the head chip is inclined with respect to the surface of the head unit base is an aspect in which only the head unit base side is formed in a step shape, an aspect in which only the head chip side is formed in a step shape, and both the head unit base and the head chip are Although there is an aspect in which it is formed in a step shape, in consideration of processing effort, an aspect in which only one of the head unit base and the head chip is formed in a step shape is preferable. In particular, it is preferable to form only the head unit base in a step shape because it can be easily processed on a single flat substrate.
- a mounting flange formed so as to protrude from the head chip to the side, and contact this with the edge of the mounting opening of the head unit base.
- the head chip main body portion of the head chip by bringing it into contact with the edge of the mounting opening of the head unit base.
- the ink jet recording apparatus uses such an ink jet head unit, and is arranged so that the nozzle surface faces the recording surface of the recording medium.
- the ink jet recording apparatus has a rotating drum that can rotate while holding a recording medium on a curved surface, and one or more ink jet head units are recorded on the recording medium held on the surface of the rotating drum. Arranged against the surface.
- a plurality of head chips are arranged along the circumferential direction of the rotating drum, and the nozzle surfaces of the plurality of head chips are respectively close to the recording surface of the recording medium held on the surface of the rotating drum.
- the plurality of head chips arranged in the circumferential direction of the rotating drum are attached so that the perpendicular to the center of each nozzle surface coincides with the rotation center of the rotating drum.
- the nozzle surface is closest to the curved recording surface of the recording medium held on the curved rotating drum surface at the center, and the rotational direction of the rotating drum surface is opposite to the rotational direction from the center.
- the recording medium is separated from the recording surface as it goes along the direction, but the separation distance is the smallest, and the difference in the separation distance to the recording surface of the recording medium between the nozzles in the nozzle surface can be reduced. . For this reason, it is possible to suppress the deviation of the landing positions between the nozzles.
- FIG. 1 is a view showing an example of an ink jet head unit according to the present invention, and is a plan view seen from a surface opposite to a nozzle surface of a head chip.
- FIG. 2 is a view showing a state in which the inkjet head unit shown in FIG. 1 is arranged close to the recording surface of a recording medium (not shown) held on the surface of the rotating drum. It is shown in a sectional view along line ii)-(ii).
- FIG. 3 is a diagram illustrating the nozzle surface of the head chip.
- the inkjet head unit 1 is arranged in a zigzag pattern along the Y direction in the figure so that four head chips 20 are arranged in two rows in the X direction in the figure on one flat head unit base 10.
- the head unit base 10 is formed of a glass substrate, and attachment openings 11 each having a rectangular shape in plan view are formed through the attachment portions of the head chips 20.
- a Si substrate or a SUS substrate is used as the head unit base 10
- a structure similar to that of the present embodiment described below may be used. Note that the X direction and the Y direction in the figure are orthogonal to each other in FIG.
- a large number of nozzles 51a are arranged in an array on the nozzle surface 21 of each head chip 20, and the nozzle row L is formed by arranging the large number of nozzles 51a in the Y direction in the figure. It is configured.
- a plurality of nozzle rows L are arranged in the X direction in the figure.
- the inkjet head unit 1 is configured so that each head chip 20 is a head so that the pitch of the nozzles 51a is equal along the Y direction in FIG.
- the unit base 10 is positioned and held in each mounting opening 11.
- Each head chip 20 is formed with two mounting flanges 22a and 22b that project greatly from both sides along the X direction in the figure.
- One attachment flange 22 a is located outside when attached to the head unit base 10, and the other attachment flange 22 b is located inside when attached to the head unit base 10.
- the nozzle surface 21 protrudes in the ink discharge direction from the positions of the mounting flanges 22a and 22b, and ink is stored on the opposite side of the nozzle surface 21 across the mounting flanges 22a and 22b.
- An ink manifold 23 is provided.
- the width of the mounting opening 11 of the head unit base 10 in the X direction in the figure is smaller than the width in the projecting direction of the two mounting flanges 22a and 22b, and the width in the Y direction in the figure is larger than the head chip 20. For this reason, the head unit base 10 and the head chip 20 come into contact with each other at the two attachment flange portions 22a and 22b.
- the head chip 20 has a head chip body 50 and a wiring board layer 60 laminated and integrated.
- the wiring board layer 60 protrudes to the side of the head chip body 50 to form the mounting flange 22 described above, and the ink manifold 23 is provided on the upper surface of the wiring board layer 60. .
- the head chip body 50 includes a nozzle plate layer 51 formed of a Si (silicon) substrate, an intermediate plate layer 52 formed of a glass substrate, and a pressure chamber plate layer formed of a Si (silicon) substrate from the lower layer side in the figure. 53 and a diaphragm 54 formed of a SiO 2 thin film.
- a nozzle plate layer 51 formed of a Si (silicon) substrate, an intermediate plate layer 52 formed of a glass substrate, and a pressure chamber plate layer formed of a Si (silicon) substrate from the lower layer side in the figure. 53 and a diaphragm 54 formed of a SiO 2 thin film.
- a large number of nozzles 51a are opened and arranged on the lower surface.
- the pressure chamber plate layer 53 is formed with a pressure chamber 53 a for storing ink for ejection, the upper wall of which is constituted by a vibration plate 54, and the lower wall of which is constituted by an intermediate plate layer 52.
- the intermediate plate layer 52 is formed with a communication passage 52a through which the inside of the pressure chamber 53a communicates with the nozzle 51a.
- Actuators 55 made of thin film PZT as pressure generating means are individually stacked on the upper surface of the diaphragm 54 so as to correspond to the pressure chambers 53a on a one-to-one basis.
- Reference numeral 55 a is an upper electrode for supplying power to the actuator 55, and is laminated on the upper surface of the actuator 55.
- Reference numeral 55b denotes a lower electrode, which is laminated in common between the upper surface of the diaphragm 54 and the lower surface of each actuator 55. Therefore, the actuator 55 is sandwiched between the upper electrode 55a and the lower electrode 55b, and is mechanically deformed by applying a predetermined voltage between the upper electrode 55a and the lower electrode 55b. Then, the diaphragm 54 is vibrated.
- the wiring substrate layer 60 includes a substrate body 61 made of a Si substrate and an adhesive resin layer 62, and a gap corresponding to the thickness of the adhesive resin layer 62 is provided between the head chip body 50 and the substrate body 61.
- the actuators 55 are stacked so as to form a predetermined space between the substrate body 61 and the diaphragm 54 in the area of each actuator 55.
- the wiring board layer 60 is formed with a through-hole 63 penetrating vertically.
- One end (upper end) communicates with the inside of the ink manifold 23, and the other end (lower end) is a pressure chamber of the head chip body 50.
- An external wiring member (FPC) (not shown here) is ACF-connected to the end of the wiring board layer 60 that becomes the mounting flange 22, and is laminated on each actuator 55 via wiring formed on the wiring board layer 60.
- FPC external wiring member
- the head unit base 10 to which each head chip 20 having such a structure is attached comes into contact with the two attachment flanges 22 a and 22 b of the head chip 20 around each attachment opening 11.
- the surface is formed in a step shape by forming the recessed portions 12a and 12b having a predetermined depth.
- the recessed portion 12a serving as a contact surface with one mounting flange portion 22a is located in the edge portion 11a located outside the mounting opening 11 along the X direction in the drawing in the ink discharge direction of the head unit base 10. It is formed by engraving at a predetermined depth from the surface side (the lower surface side in FIG. 2). As a result, the edge portion 11a is partially thin.
- the recessed portion 12b serving as a contact surface with the other mounting flange portion 22b is formed in the ink discharge direction of the head unit base 10 at the edge portion 11b positioned on the inner side of each mounting opening 11 along the X direction in the drawing. It is formed by engraving at a predetermined depth from the opposite surface side (upper surface side in FIG. 2). As a result, the edge portion 11b is partially thin.
- edge portions 11a and 11b of the mounting opening 11 of the head unit base 10 facing each other along the X direction in the figure are alternately recessed and recessed portions 12a and 12b on the front and back of the head unit base 10 on one side and the other side.
- Each has a step shape.
- the edge portions 11a and 11b are the two edge portions where the attachment flange portions 22a and 22b projecting on both sides of the head chip 20 abut on the inner peripheral edge of the attachment opening 11 having a rectangular shape. It is.
- the thickness of the edge portions 11a and 11b is reduced, when the attachment flange portions 22a and 22b are brought into contact with each other to attach the head chip 20, the attachment flange portions 22a and 22b are reduced by the thickness of the head unit base 10. It sinks in the thickness direction of the head unit base 10 from the surface of the head unit base 10 and comes into contact with a position lower than the height position of the surface of the head unit base 10.
- one attachment flange 22 a corresponding to one edge 11 a of the attachment opening 11 abuts against the edge 11 a from the lower surface side of the head unit base 10, and the attachment flange 22 a are arranged so that their end portions are accommodated in the recessed portion 12a. Further, the other attachment flange 22b corresponding to the other edge 11b of the attachment opening 11 abuts on the edge 11b from the upper surface side of the head unit base 10, and the end of the attachment flange 22b. Is disposed in the recessed portion 12b.
- the nozzle surface 21 of the head chip 20 is attached to the surface of the head unit base 10 so as to be inclined along the X direction in the figure.
- the inclination angle of the head chip 20 is such that the recessed depths of the recessed portions 12a and 12b and the overlapping amounts of the edge portions 11a and 11b of the mounting opening 11 and the mounting flange portions 22a and 22b of the head chip 20 are as follows. Fine adjustment is made by fine-tuning.
- Each head chip 20 is fixed by being cured by applying a photosensitive adhesive (not shown) at each of the mounting flanges 22a and 22b and irradiating light having a wavelength of the curing sensitivity of the adhesive.
- a photosensitive adhesive as the fixing means, it is possible to finely adjust the position of the head chip 20 in the mounting opening 11 in a state before light irradiation even after the adhesive is applied. is there.
- the photosensitive adhesive an ultraviolet curable adhesive that is cured by irradiation with UV light can be preferably used.
- the head unit base 10 is preferably formed of a glass substrate.
- the head unit base 10 is brought into close contact with the ultraviolet curable adhesive applied to the mounting flanges 22a and 22b, and the head The chip 20 is set at the optimum position.
- the ultraviolet rays that have passed through the head unit base 10 are irradiated onto the ultraviolet curable adhesive, and the ultraviolet curable adhesive is cured.
- the head chip 20 is bonded and fixed to the head unit base 10.
- the ultraviolet curable adhesive is cured almost uniformly and the ultraviolet curable adhesive is irradiated with ultraviolet rays in a non-contact manner, so that the head chip 20 set at the optimum position is not displaced and the head chip 20 is It is fixed to the base 10. That is, the inkjet head unit in which the position of the head chip 20 in the mounting opening 11 of the head unit base 10 is bonded and fixed in an optimum state and positioned with high accuracy can be easily and stably supplied.
- External wiring members 24a and 24b for supplying power to the upper electrode 55a and the lower electrode 55b (FIG. 4) of the actuator 55 are connected to the mounting flanges 22a and 22b of the head chip 20, respectively.
- One external wiring member 24a is connected to the lower surface side (nozzle surface 21 side) of the mounting flange 22a, which is the lower side in the tilt direction with respect to the surface of the head unit base 10, and the other external wiring member 24b is connected to the head unit base.
- 10 is connected to the upper surface side (ink manifold 23 side) of the mounting flange portion 22b which is the upper side in the inclination direction with respect to the surface of 10, and is routed upward and electrically connected to a drive IC (not shown).
- reference numeral 30 denotes a cylindrical rotating drum constituting the ink jet recording apparatus, and a recording surface is configured by holding a recording medium (not shown) on a curved drum surface 31.
- the X direction in the figure which is the direction in which the nozzle rows L of the head chips 20 are arranged side by side, is along the rotational direction of the rotary drum 30, and the nozzle surfaces 21 of the head chips 20 are the drum surfaces.
- the recording medium 31 is arranged so as to be close to the recording surface of the recording medium.
- each head chip 20 is set so that the perpendicular P to the center 21 ′ of the nozzle surface 21 coincides with the rotation center O of the rotary drum 30. At this time, each head chip 20 is inclined with respect to the surface of the flat head unit base 10 along the rotational direction of the rotary drum 30.
- the nozzle surface 21 can be brought closest to the recording surface of the recording medium held on the drum surface 31.
- the distance D1 between the center 21 ′ of the nozzle surface 21 and the recording surface of the recording medium held on the drum surface 31 is the smallest, and the nozzle surface 21 is closer to the mounting flanges 22a and 22b.
- each head chip 20 is attached to be inclined with respect to the surface of the head unit base 10, it is not necessary to form a curved surface or an inclined surface, and all the head chips 20 are formed on the surface of the flat head unit base 10.
- it can be configured only by forming the recessed portions 12a and 12b so that a parallel flat surface is recessed. For this reason, an extremely difficult operation such as curving so as to coincide with the drum surface 31 is unnecessary, and the inkjet head unit 1 in which the nozzle surface 21 of the head chip 20 is inclined at a predetermined angle can be configured very simply. .
- the head chip 20 is not affected by the thickness of the head unit base 10.
- the nozzle surface 21 can be brought as close as possible to the recording surface of the recording medium held on the drum surface 31 of the rotary drum 30. Therefore, the head unit base 10 can be made thick enough to ensure sufficient strength.
- a resist mask M is laminated and formed on one surface of a glass substrate 40 cut into a predetermined planar shape, and patterned by a known exposure / development process to form mounting openings 11 in a staggered arrangement 4.
- the resist mask M of only one rectangular region m1 is removed (FIGS. 6A and 6B).
- each recess 41 is blasted so as to be half the thickness of the glass substrate 40 by adjusting the processing time (FIG. 7).
- a resist mask M is similarly laminated on the other surface of the glass substrate 40 and patterned by a known exposure / development process to remove only the four rectangular regions m2.
- the rectangular region m2 at this time is formed so as to be biased slightly toward the center of the glass substrate 40 with respect to the position of the recess 41 formed in the rectangular region m1 on one surface (FIG. 8A ), (B)).
- each recess 42 is blasted so as to have a depth of the remaining half of the thickness of the glass substrate 40 by adjusting the processing time (FIG. 9).
- each mounting opening 11 has a recessed portion 12a formed from the lower surface side of the head unit base 10 at one edge portion 11a, and the head unit base 10 at the other edge portion 11b.
- the recessed portion 12b By forming the recessed portion 12b from the upper surface side, the front and back surfaces are formed in a staggered shape (FIGS. 10 and 11).
- FIG. 12 shows another mode in which the head chip 20 is inclined with respect to the surface of the head unit base 10. Since two rows of head chips 20 along the X direction in the figure appear symmetrically, only one head chip 20 in one row will be described here.
- the head chip 20 is inserted and attached to the attachment opening 11 of the head unit base 10 from the lower surface side.
- the opposing edge portions 11a and 11b of the attachment opening 11 where the two attachment flange portions 22a and 22b of the head chip 20 abut each other no step processing is applied to one of the edge portions 11a.
- only the other edge portion 11b is formed in a step shape by forming the recessed portion 12b from the lower surface side. For this reason, the edge portions 11a and 11b have different height positions relative to the lower surface of the head unit base 10 (the height position of the head unit base 10 in the thickness direction).
- one attachment flange 22 a comes into contact with one edge portion 11 a of the attachment opening 11 from the lower surface side.
- the other attachment flange 22b comes into contact with the recessed portion 12b of the other edge 11b of the attachment opening 11, and the both attachment flanges 22a and 22b are in contact with the lower surface of the head unit base 10.
- the height position is different, and the nozzle surface 21 is inclined and attached to the other attachment flange 22b side.
- the inclination angle is finely adjusted by finely adjusting the concave depth of the concave portion 12b and the amount of overlap between the edge portions 11a and 11b of the attachment opening 11 and the attachment flange portions 22a and 22b of the head chip 20. Adjusted.
- the head chip 20 is attached to the head unit base 10 from the lower surface side, the nozzle surface 21 of each head chip 20 is moved to the drum surface 31 of the rotary drum 30 without being affected by the thickness of the head unit base 10. Can be as close as possible to the recording surface of the recording medium held on the recording medium. Therefore, the head unit base 10 can be made thick enough to ensure sufficient strength.
- the external wiring members 24a and 24b are joined to the lower surface side (nozzle surface 21 side) of the mounting flange portions 22a and 22b of the head chip 20, respectively.
- One external wiring member 24a located outside the head unit base 10 can be pulled out from the side of the head unit base 10 to the upper surface side as it is, but inside the head unit base 10 (along the X direction in the figure).
- the other external wiring member 24b positioned between adjacent rows of head chips 20 cannot be pulled out to the upper surface side of the head unit base 10.
- FIG. 13 shows still another aspect in which the head chip 20 is inclined with respect to the surface of the head unit base 10. Since the two rows of head chips 20 along the X direction in the figure appear symmetrically, only one head chip 20 in one row will be described here.
- the head chip 20 is inserted and attached to the attachment opening 11 of the head unit base 10 from the upper surface side.
- one of the edge portions 11a has a recessed portion 12a formed from the upper surface side.
- no step processing is applied to the other edge portion 11b.
- the edge portions 11a and 11b have different height positions with respect to the upper surface of the head unit base 10 (the height position of the head unit base 10 in the thickness direction).
- one attachment flange 22 a is in the recessed portion 12 a of one edge 11 a of the attachment opening 11.
- the other attachment flange 22b comes into contact with the other edge 11b of the attachment opening 11 from the upper surface side, and the both attachment flanges 22a and 22b are in contact with the upper surface of the head unit base 10.
- the height position is different, and the nozzle surface 21 is inclined and attached to the one attachment flange 22a side.
- the inclination angle is finely adjusted by finely adjusting the concave depth of the concave portion 12a and the amount of overlap between the edge portions 11a and 11b of the attachment opening 11 and the attachment flange portions 22a and 22b of the head chip 20. Adjusted.
- the external wiring members 24a and 24b can be joined to the upper surface side (the surface opposite to the nozzle surface 21) of the mounting flange portions 22a and 22b of the head chip 20, respectively. If the portion 12a is recessed so as to continue to the end of the head unit base 10, the external wiring member 24a can be pulled out from the recessed portion 12a to the side of the head unit base 10 as a result.
- the attachment flange portion 22a side positioned at can be joined to the lower surface side thereof.
- FIG. 14 shows still another aspect in which the head chip 20 is inclined with respect to the surface of the head unit base 10. Since the two rows of head chips 20 along the X direction in the figure appear symmetrically, only one head chip 20 in one row will be described here.
- the head chip 20 is inserted into the mounting opening 11 of the head unit base 10 from the upper surface side and attached using the head chip body 50 portion of the head chip 20. No processing is applied to the mounting opening 11 of the head unit base 10, and a step-shaped processing is added to the head chip body 50 side.
- the head chip main body 50 closer to the nozzle surface 21 than the mounting flanges 22a and 22b has a plurality of layers (nozzle plate layer 51, intermediate plate layer 52, pressure chamber plate layer 53, Since the diaphragm 54) is formed, the lower surface side (nozzle surface side) of different layers abuts against the opposite edge portions 11a and 11b of the mounting opening 11 among the plurality of layers.
- the widths of the plurality of layers are varied. In FIG. 14, the diaphragm 54 is not shown.
- the nozzle plate layer 51 and the intermediate plate layer 52 are disposed at the portion corresponding to the one edge portion 11 a of the mounting opening 11, and the pressure chamber plate layer 53 and the diaphragm 54 that are the upper layers thereof.
- the width narrower By forming the width narrower than that, the lower surface side of the pressure chamber plate layer 53 is exposed, and a stepped contact step portion 50a that becomes a contact surface with the edge portion 11a of the mounting opening 11 is formed. Yes.
- the nozzle plate layer 51 is formed to be narrower than the intermediate plate layer 52, the pressure chamber plate layer 53, and the diaphragm 54 which are the upper layers.
- a stepped contact step portion 50b that becomes a contact surface with the edge portion 11b of the attachment opening portion 11 is formed.
- These contact step portions 50a and 50b have different height positions on the lower surface side, and the contact step portion 50b is closer to the nozzle surface 21 than the contact step portion 50a. Is in position.
- the contact step portion 50 a far from the nozzle surface 21 is one side edge of the attachment opening 11 on the lower surface of the pressure chamber plate layer 53.
- the contact step 50b closer to the nozzle surface 21 is in contact with the other edge portion 11b on the lower surface of the intermediate plate layer 52 from the upper surface side.
- the nozzle surface 21 is inclined and attached to the one mounting flange 22a side so that the contact step 50a side protrudes below the head unit base 10 as compared to the contact step 50b side. It is done.
- the inclination angle is finely adjusted by finely adjusting the thickness of each layer and the amount of overlap between the edge portions 11a and 11b of the mounting opening 11 and the contact step portions 50a and 50b.
- the mounting opening 11 needs to be formed on the head unit base 10 side, and stepped processing is not necessary.
- the width of the layer is partially changed to form a stepped surface that contacts the edge portions 11a and 11b of the mounting opening 11. Therefore, the manufacturing process can be simplified.
- the external wiring members 24a and 24b can be joined to the upper surface side (the surface opposite to the nozzle surface 21) of the mounting flange portions 22a and 22b of the head chip 20, respectively. Since 22b is also exposed on the upper surface side of the head unit base 10, it can also be joined to the lower surface side of the mounting flange portions 22a and 22b. For this reason, it is not necessary to form a wiring lead hole in the head unit base 10.
- the head chip is formed of a plurality of layers, and the width of the plurality of layers is varied so that different layers abut against the opposite edge portions of the mounting opening, whereby the edge portion Since the contact surface is formed, the attachment flanges 22a and 22b need not be provided.
- FIG. 15 shows still another aspect in which the head chip 20 is inclined with respect to the surface of the head unit base 10. Since the two rows of head chips 20 along the X direction in the figure appear symmetrically, only one head chip 20 in one row will be described here.
- the mounting opening 11 of the head unit base 10 is not processed at all.
- a step-like process is applied to the wiring board layer 60 that constitutes the mounting flange portions 22a and 22b of the head chip 20.
- the end of the attachment flange 22a corresponding to one edge 11a of the attachment opening 11 in the wiring board layer 60 is formed in a step shape recessed from the upper surface side.
- an abutting step portion 22a1 having a partially reduced thickness is formed at the end of the mounting flange portion 22a.
- the contact step 22a1 can be formed by partially reducing the thickness of the substrate body 61 of the wiring substrate layer 60.
- the end portion of the attachment flange 22b corresponding to the other edge portion 11b of the attachment opening 11 in the wiring board layer 60 is formed in a step shape recessed from the lower surface side.
- an abutting step 22b1 having a partially reduced thickness is formed at the end of the mounting flange 22b.
- the contact step 22b1 can be formed by partially reducing the thickness of the adhesive resin layer 62 of the wiring board layer 60.
- the contact step 22a1 formed on the upper surface side of one mounting flange 22a contacts the one edge 11a of the mounting opening 11, and the lower surface of the other mounting flange 22b
- the abutting step portion 22b1 formed on the side is attached to the head unit base 10 so as to abut on the other edge portion 11b of the attachment opening 11.
- the nozzle surface 21 is attached so as to be inclined so that the attachment flange 22a protrudes below the head unit base 10 as compared with the attachment flange 22b.
- the inclination angle finely adjusts the concave thickness of each contact step 22a1, 22b1 with respect to the wiring board layer 60 and the amount of overlap between each edge 11a, 11b of the attachment opening 11 and the contact step 22a1, 22b1. It is fine-tuned by doing.
- the mounting opening 11 needs to be formed on the head unit base 10 side, and stepped processing is not necessary.
- the mounting openings 11 are formed by recessing the end portions to be the mounting flange portions 22a and 22b from the upper surface side or the lower surface side to reduce the thickness of the end portions.
- the surfaces that come into contact with the edge portions 11a and 11b can be formed in a step shape.
- the manufacturing process can be further simplified.
- FIG. 15 shows an example in which the contact step portions 22a1 and 22b1 are formed on the attachment flange portions 22a and 22b, respectively.
- the contact step portion may be formed only on one of the two attachment end portions 22a and 22b.
- FIG. 16 shows an example of an ink jet recording apparatus according to the present invention.
- a plurality of the ink jet head units 1 described above are arranged in the vicinity of the recording surface of a recording medium (not shown) held on the drum surface 31 of one rotary drum 30 along the rotation direction. Consists of.
- the head chip 20 of each inkjet head unit 1 has, for example, the X direction in FIG. 1 along the rotation direction of the rotary drum 30 and, as described in FIG.
- the head unit base 10 is disposed so as to be inclined with respect to the surface of the head unit base 10 so as to coincide with the rotation center O of the rotary drum 30.
- each head chip 20 of each ink jet head unit 1 has a simple structure, but with respect to the curved recording surface of the recording medium held on the curved drum surface 31. Therefore, the landing position shift due to the nozzle position is suppressed, and high-quality recording can be performed.
- Inkjet head unit 10 Head unit base 11: Mounting opening 11a, 11b: Edge portions 12a, 12b: Recessed portion 13: Wiring lead hole 20: Head chip 21: Nozzle surface 21 ′: Center of nozzle surface 22 22a, 22b: mounting flange 23: ink manifold 24a, 24b: external wiring member 30: rotating drum 31: drum surface 50: head chip body 50a, 50b: contact step 51: nozzle plate layer 51a: nozzle 52: Intermediate plate layer 52a: Communication path 53: Pressure chamber plate layer 53a: Pressure chamber 54: Vibration plate 55: Actuator 55a: Upper electrode 55b: Lower electrode 60: Wiring board layer 61: Board body 62: Adhesive resin layer 63: Through hole P: Vertical line O: Center of rotation of rotating drum L: No Le row
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- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Ink Jet (AREA)
Abstract
Description
前記ヘッドユニットベースと前記ヘッドチップとが当接する当接面のうち、前記ヘッドユニットベース側の当接面と前記ヘッドチップ側の当接面の少なくともいずれか一方の当接面を段状に形成し、前記ヘッドユニットベースの表面に対する前記ヘッドチップの当接面の高さを部分的に異ならせることにより、前記ヘッドチップを前記ヘッドユニットベースの表面に対して傾斜させて取り付けたことを特徴とするインクジェットヘッドユニット。
前記ヘッドチップは、相反する側方にそれぞれ張り出す取付け鍔部を有すると共に、該取付け鍔部の各々と前記取付け開口部の対向する辺縁部とがそれぞれ当接することによって前記ヘッドユニットベースに取り付けられ、且つ、前記取付け鍔部と前記辺縁部との少なくともいずれか一方の当接面を段状に形成し、前記ヘッドユニットベースの表面に対する前記ヘッドチップの当接面の高さを部分的に異ならせたことを特徴とする前記1記載のインクジェットヘッドユニット。
前記ヘッドチップは、前記取付け鍔部がそれぞれ前記ヘッドユニットベースにおけるインク吐出方向と反対方向の面側から該ヘッドユニットベースに当接し、且つ、一方の前記取付け鍔部が、段状に凹設された前記辺縁部に当接することで、前記ヘッドユニットベースの表面に対して傾斜して取り付けられていることを特徴とする前記2記載のインクジェットヘッドユニット。
前記ヘッドチップは、前記取付け鍔部がそれぞれ前記ヘッドユニットベースにおけるインク吐出方向の面側から該ヘッドユニットベースに当接し、且つ、一方の前記取付け鍔部が、段状に凹設された前記辺縁部に当接することで、前記ヘッドユニットベースの表面に対して傾斜して取り付けられていることを特徴とする前記2記載のインクジェットヘッドユニット。
前記ヘッドチップは、一方の前記取付け鍔部が前記ヘッドユニットベースにおけるインク吐出方向の面側から該ヘッドユニットベースに当接し、且つ、前記ヘッドユニットベースにおけるインク吐出方向の面側から所定の深さで段状に凹設された前記辺縁部に当接し、他方の前記取付け鍔部が前記ヘッドユニットベースにおけるインク吐出方向と反対面側から該ヘッドユニットベースに当接し、且つ、前記ヘッドユニットベースにおけるインク吐出方向と反対面側から所定の深さで段状に凹設された前記辺縁部に当接することで、前記ヘッドユニットベースの表面に対して傾斜して取り付けられていることを特徴とする前記2記載のインクジェットヘッドユニット。
前記ヘッドユニットベースにおけるインク吐出方向の面側から凹設された前記辺縁部の近傍に配線引き出し穴が貫通形成され、当該辺縁部に当接する前記取付け鍔部に接続された前記外部配線部材が、前記配線引き出し穴を通って前記ヘッドユニットベースにおけるインク吐出方向の反対面に引き出されていることを特徴とする前記4又は5記載のインクジェットヘッドユニット。
前記ヘッドチップは、複数の層によって形成されており、該複数の層のうち、前記取付け開口部の対向する辺縁部に対してそれぞれ異なる層が当接するように前記複数の層の幅を異ならせることにより、前記辺縁部との当接面が形成されていることを特徴とする前記1記載のインクジェットヘッドユニットである。
前記回転ドラムの周方向に沿って複数の前記ヘッドチップが配置されると共に、該ヘッドチップの前記ノズル面がそれぞれ前記回転ドラムの表面に保持された前記記録媒体の被記録面に近接するように配置され、前記記録媒体の被記録面に向けて前記ノズルからインクを吐出することにより描画を行う前記1~12のいずれかに記載のインクジェットヘッドユニットとを有し、
前記回転ドラムの周方向に配置される複数の前記ヘッドチップは、それぞれの前記ノズル面の中心に対する垂線が前記回転ドラムの回転中心に一致していることを特徴とするインクジェット記録装置。
10:ヘッドユニットベース
11:取り付け開口部
11a、11b:辺縁部
12a、12b:凹設部
13:配線引き出し穴
20:ヘッドチップ
21:ノズル面
21’:ノズル面の中心
22、22a、22b:取付け鍔部
23:インクマニホールド
24a、24b:外部配線部材
30:回転ドラム
31:ドラム表面
50:ヘッドチップ本体
50a、50b:当接段部
51:ノズルプレート層
51a:ノズル
52:中間プレート層
52a:連通路
53:圧力室プレート層
53a:圧力室
54:振動板
55:アクチュエータ
55a:上部電極
55b:下部電極
60:配線基板層
61:基板本体
62:接着樹脂層
63:貫通孔
P:垂線
O:回転ドラムの回転中心
L:ノズル列
Claims (13)
- ノズル面に複数のノズルが配列され、該複数のノズルのそれぞれに連通した圧力室からそれぞれ独立した圧力発生手段によってインクを吐出することが可能なヘッドチップと、前記ヘッドチップを複数配置して保持可能な平板状のヘッドユニットベースとを有するインクジェットヘッドユニットにおいて、
前記ヘッドユニットベースと前記ヘッドチップとが当接する当接面のうち、前記ヘッドユニットベース側の当接面と前記ヘッドチップ側の当接面の少なくともいずれか一方の当接面を段状に形成し、前記ヘッドユニットベースの表面に対する前記ヘッドチップの当接面の高さを部分的に異ならせることにより、前記ヘッドチップを前記ヘッドユニットベースの表面に対して傾斜させて取り付けたことを特徴とするインクジェットヘッドユニット。 - 前記ヘッドユニットベースは、前記ヘッドチップの取付け開口部を有し、
前記ヘッドチップは、相反する側方にそれぞれ張り出す取付け鍔部を有すると共に、該取付け鍔部の各々と前記取付け開口部の対向する辺縁部とがそれぞれ当接することによって前記ヘッドユニットベースに取り付けられ、且つ、前記取付け鍔部と前記辺縁部との少なくともいずれか一方の当接面を段状に形成し、前記ヘッドユニットベースの表面に対する前記ヘッドチップの当接面の高さを部分的に異ならせたことを特徴とする請求項1記載のインクジェットヘッドユニット。 - 前記ヘッドユニットベースは、前記取付け開口部のいずれか一方の前記辺縁部のみが、該ヘッドユニットベースにおけるインク吐出方向と反対方向の面側から所定の深さで段状に凹設されており、
前記ヘッドチップは、前記取付け鍔部がそれぞれ前記ヘッドユニットベースにおけるインク吐出方向と反対方向の面側から該ヘッドユニットベースに当接し、且つ、一方の前記取付け鍔部が、段状に凹設された前記辺縁部に当接することで、前記ヘッドユニットベースの表面に対して傾斜して取り付けられていることを特徴とする請求項2記載のインクジェットヘッドユニット。 - 前記ヘッドユニットベースは、前記取付け開口部のいずれか一方の前記辺縁部のみが、該ヘッドユニットベースにおけるインク吐出方向の面側から所定の深さで段状に凹設されており、
前記ヘッドチップは、前記取付け鍔部がそれぞれ前記ヘッドユニットベースにおけるインク吐出方向の面側から該ヘッドユニットベースに当接し、且つ、一方の前記取付け鍔部が、段状に凹設された前記辺縁部に当接することで、前記ヘッドユニットベースの表面に対して傾斜して取り付けられていることを特徴とする請求項2記載のインクジェットヘッドユニット。 - 前記ヘッドユニットベースは、前記取付け開口部のいずれか一方の前記辺縁部が、該ヘッドユニットベースにおけるインク吐出方向の面側から所定の深さで段状に凹設されていると共に、他方の前記辺縁部が、該ヘッドユニットベースにおけるインク吐出方向と反対面側から所定の深さで段状に凹設されており、
前記ヘッドチップは、一方の前記取付け鍔部が前記ヘッドユニットベースにおけるインク吐出方向の面側から該ヘッドユニットベースに当接し、且つ、前記ヘッドユニットベースにおけるインク吐出方向の面側から所定の深さで段状に凹設された前記辺縁部に当接し、他方の前記取付け鍔部が前記ヘッドユニットベースにおけるインク吐出方向と反対面側から該ヘッドユニットベースに当接し、且つ、前記ヘッドユニットベースにおけるインク吐出方向と反対面側から所定の深さで段状に凹設された前記辺縁部に当接することで、前記ヘッドユニットベースの表面に対して傾斜して取り付けられていることを特徴とする請求項2記載のインクジェットヘッドユニット。 - 前記ヘッドチップは、前記取付け鍔部にそれぞれ外部配線部材が接続されており、
前記ヘッドユニットベースにおけるインク吐出方向の面側から凹設された前記辺縁部の近傍に配線引き出し穴が貫通形成され、当該辺縁部に当接する前記取付け鍔部に接続された前記外部配線部材が、前記配線引き出し穴を通って前記ヘッドユニットベースにおけるインク吐出方向の反対面に引き出されていることを特徴とする請求項4又は5記載のインクジェットヘッドユニット。 - 前記ヘッドユニットベースは、材質がガラスであり、ブラスト加工によって所定深さで段状に凹設されていることを特徴とする請求項3~6のいずれかに記載のインクジェットヘッドユニット。
- 前記ヘッドユニットベースは、材質がSiであり、エッチング加工によって所定深さで段状に凹設されていることを特徴とする請求項3~6のいずれかに記載のインクジェットヘッドユニット。
- 前記ヘッドユニットベースは、材質がSUSであり、フライス加工、ブラスト加工又はエッチング加工の少なくともいずれか1つの加工によって所定深さで段状に凹設されていることを特徴とする請求項3~6のいずれかに記載のインクジェットヘッドユニット。
- 前記ヘッドユニットベースは、前記ヘッドチップの取付け開口部を有し、
前記ヘッドチップは、複数の層によって形成されており、該複数の層のうち、前記取付け開口部の対向する辺縁部に対してそれぞれ異なる層が当接するように前記複数の層の幅を異ならせることにより、前記辺縁部との当接面が形成されていることを特徴とする請求項1記載のインクジェットヘッドユニット。 - 前記ヘッドチップは、前記ヘッドユニットベースに対して感光性接着剤によって接着されていることを特徴とする請求項1~10のいずれかに記載のインクジェットヘッドユニット。
- 前記ヘッドチップは、当該ヘッドチップの傾斜方向に沿って並設された複数のノズル列を有することを特徴とする請求項1~11のいずれかに記載のインクジェットヘッドユニット。
- 曲面状の表面に記録媒体を保持して回転可能な回転ドラムと、
前記回転ドラムの周方向に沿って複数の前記ヘッドチップが配置されると共に、該ヘッドチップの前記ノズル面がそれぞれ前記回転ドラムの表面に保持された前記記録媒体の被記録面に近接するように配置され、前記記録媒体の被記録面に向けて前記ノズルからインクを吐出することにより描画を行う請求項1~12のいずれかに記載のインクジェットヘッドユニットとを有し、
前記回転ドラムの周方向に配置される複数の前記ヘッドチップは、それぞれの前記ノズル面の中心に対する垂線が前記回転ドラムの回転中心に一致していることを特徴とするインクジェット記録装置。
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JP2012549766A JPWO2012086520A1 (ja) | 2010-12-22 | 2011-12-15 | インクジェットヘッドユニット及びインクジェット記録装置 |
EP11850695.5A EP2657030A4 (en) | 2010-12-22 | 2011-12-15 | INKJET HEAD UNIT AND INKJET PRINTING DEVICE |
US13/996,795 US8979246B2 (en) | 2010-12-22 | 2011-12-15 | Inkjet head unit and inkjet recording device |
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Cited By (2)
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WO2015129544A1 (ja) * | 2014-02-28 | 2015-09-03 | コニカミノルタ株式会社 | インクジェット記録装置 |
JP2018192657A (ja) * | 2017-05-15 | 2018-12-06 | 株式会社リコー | ヘッド取付部材、アレイユニット及び画像形成装置 |
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US10052869B2 (en) | 2014-09-19 | 2018-08-21 | Konica Minolta, Inc. | Inkjet head, inkjet head module, and inkjet printer |
US9987644B1 (en) | 2016-12-07 | 2018-06-05 | Funai Electric Co., Ltd. | Pedestal chip mount for fluid delivery device |
CN115339244B (zh) * | 2022-07-22 | 2023-08-22 | 广州精陶机电设备有限公司 | 一种具有偏转角的打印喷头组件及打印装置 |
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US20130271528A1 (en) | 2013-10-17 |
JPWO2012086520A1 (ja) | 2014-05-22 |
EP2657030A4 (en) | 2016-10-26 |
US8979246B2 (en) | 2015-03-17 |
EP2657030A1 (en) | 2013-10-30 |
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