JP2014094454A - Line type ink jet recording head module and ink jet recording device including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a line type ink jet recording head module capable of facilitating a replacement work of an ink jet recording head, and preventing a trouble occurring during the work.SOLUTION: A plurality of line-shaped through holes 63 having the same size as the outer peripheral size of a head part 35 of an ink jet recording head 75 are provided on a drive control substrate 78 for transmitting a drive waveform or image data to the ink jet recording head 75, and each head part 35 is fitted into each through hole 63 and fixed, respectively.

Description

  The present invention relates to a line type ink jet recording apparatus in which a plurality of ink jet recording heads are arranged, and more particularly to a support structure for an ink jet recording head in a line type ink jet recording head module.

  FIG. 8 and FIG. 9 are a perspective view of an ink jet recording head module used in a conventional line type ink jet recording apparatus, and a side view of a part thereof.

  As shown in the figure, the conventional ink jet recording head module 8 is mainly composed of an ink jet recording head 15, a drive control board 18, a flat cable 19, and an adjustment plate 20.

  The drive control board 18 is a rigid board on which a drive waveform for driving a piezoelectric element (not shown) in the ink jet recording head 15 and a circuit for generating an image data signal are mounted. The flat cable 19 is for electrically connecting the inkjet recording head 15 and the drive control board 18. The adjustment plate 20 is used to arrange and mount a plurality of inkjet recording heads 15 in a line with high accuracy.

  Although not shown, an opening penetrating in the thickness direction is formed at a position of the adjustment plate 20 where the inkjet recording head 15 is disposed, and the lower surface (nozzle surface) of the inkjet recording head 15 is formed from the opening. Is exposed.

  As shown in FIG. 8, the drive waveform transmitted from the drive control board 18 with the lower surface of the adjustment plate 20 (nozzle surface of the inkjet recording head 15) and the recording paper (recording medium) 1 facing each other, In response to the command value of the image data signal, ink droplets are ejected from the inkjet recording head 15 toward the recording paper 1 to form an image.

  A plurality of inkjet recording heads 15 are connected to a single drive control board 18 and can be driven. In the conventional inkjet recording head module 8 shown in FIG. 8, it is possible to drive and control a maximum of eight inkjet recording heads 15 with one drive control board. Further, in FIG. 8, the number of the flat cables 19 is reduced in order to simplify the drawing. In FIG. 8, four flat cables 19 are shown, but about 16 are actually connected.

  When replacing a specific (one) inkjet recording head 15 from among a plurality of inkjet recording heads 15 mounted on the adjustment plate 20, it is connected to another inkjet recording head 15 that is not a replacement target and the inkjet recording head 15. There is a problem that the flat cable 19 or the like is an obstacle and the workability at the time of replacement is poor.

  A detailed configuration of the conventional inkjet recording head 15 and the drive control board 18 will be described with reference to FIG. In order to simplify the drawing, the inkjet recording head 15 and the drive control board 18 are illustrated in a one-to-one relationship.

  A conventional drive control board 18 includes a D / A converter (not shown) that generates a drive waveform in accordance with the characteristics of each inkjet recording head 15, and an operational amplifier (amplifying the analog signal output from the D / A converter). (Not shown), MOSFET 21 that amplifies the drive waveform voltage output from the operational amplifier and supplies it to a piezoelectric element (not shown) in the inkjet recording head 15, and cooling that cools Joule heat generated as a loss of the MOSFET 21 Image data transmitted to the inkjet recording head 15 by performing serialization processing of image data signals transmitted from the fins 22, electrolytic capacitors 23 for assisting current supply to the piezoelectric elements (not illustrated), and controllers (not illustrated). Electrical connection between the signal driver IC 24 and the inkjet recording head 15 It is constructed from such a connector 25 for attaching and detaching the flat cable 19 to achieve connection.

  As shown in FIG. 1, the ink jet recording head 15 includes an image data control board 30, a flexible printed board 31, an ink tank 33, a head board 34, a head portion 35, and the like.

  The image data control board 30 is a rigid board on which a connector 26 for attaching and detaching the flat cable 19 and the image data signal receiver IC 29 is mounted, and is fixed to the side surface of the ink tank 33 with a tapping screw 28.

  The image data signal receiver IC 29 has a function of deserializing an image data signal serially transferred from the image data signal driver IC 24 mounted on the drive control board 18 and transferring the image data signal in parallel to a piezoelectric element driving IC (not shown). ing.

  As shown in FIG. 9, the flexible printed circuit board 31 is for electrically connecting the image data control board 30 and the head board 34, is made of a flexible material, and can be bent easily.

  The head substrate 34 is a rigid substrate provided with pads for connecting a piezoelectric element support substrate (not shown) mounted in the head portion 35, and is bonded between the head portion 35 and the ink tank 33. Has been placed.

  The ink tank 33 is a tank for temporarily storing ink ejected from nozzles (not shown). Further, the ink is supplied through a joint portion 32 provided on the upper portion of the ink tank 33. In addition, since it is not related directly to this invention about the structure of the upper part from joint part 32, illustration and description are abbreviate | omitted.

  The line-type ink jet recording head module composed of a plurality of ink jet recording heads 15 needs to be periodically replaced due to a failure due to aging of the ink jet recording head 15 and maintenance and inspection. Therefore, easy replacement work (maintenance) of the inkjet recording head 15 is required.

  However, in the conventional line type ink jet recording head module shown in FIGS. 8 and 9, a specific (one) ink jet recording head 15 is replaced from among the plurality of ink jet recording heads 15 mounted on the adjustment plate 20. The other inkjet recording head 15 that is not a replacement target and the flat cable 19 connected to the inkjet recording head 15 become an obstacle, and there is a problem that workability at the time of replacement is poor.

  Furthermore, there is a risk that the flat cable 19 may be disconnected or damaged by hooking the flat cable 19 on the uneven portion in the ink jet recording apparatus during the replacement operation. Further, when the flat cable 19 is inserted into and removed from the connector 26 mounted on the upper surface side of the inkjet recording head 15, the stress generated at the time of insertion / extraction gives a localized (non-uniform) load to the inkjet recording head 15, There is a risk of rupture of the ink supply path and the waste liquid path in the ink jet recording head 15.

  Further, the drive waveform transmitted from the drive control board 18 to the inkjet recording head 15, the copper foil pattern for image data signals, and the components (connectors, flat cables, etc.) through which the signals pass have impedances for the following reasons. It is essential to be consistent.

(1) To suppress reflection / attenuation of image data signals serially transmitted at a transfer rate of several hundred Mbps to several Gbps.
(2) In order to suppress variations in the supply current to each ink jet recording head 15 when the drive waveform is applied.

  In the ink jet recording head module 8, the signal is transmitted to the ink jet recording head 15 via the drive control board 18 → the connector 25 → the flat cable 19 → the connector 26 → the image data control board 30.

  Since the impedance value of each component has a tolerance of about ± 15%, the more components there are, the easier the impedance mismatch will occur, and in some cases (added by the influence of disturbance), accurate signal transmission Can be difficult.

  Conventionally, International Publication No. WO2004 / 022344 (Patent Document 1) includes a plurality of ink jet recording heads for easy replacement and alignment at the time of manufacturing and maintenance of the line type ink jet recording apparatus. Disclosed is a technique for improving workability by embedding a cable for transmitting a signal to an inkjet recording head and a tube for supplying ink in an adjustment plate to which each inkjet recording head is fixed. Yes.

  However, this ink jet recording apparatus has a configuration in which a connector is mounted on the ink jet recording head and is connected to the upper substrate, and therefore, an ink supply path in the ink jet recording head or The waste liquid path may be damaged. Further, the problem that impedance mismatch occurs in the connector portion cannot be solved.

  Japanese Patent Application Laid-Open No. 2007-90691 (Patent Document 2) discloses a line-type ink jet recording apparatus capable of printing by one scan, and reduces the number of wirings between units and aligns a plurality of heads. For the purpose of facilitating, two ink droplet ejection substrates in which a head module is arranged with a plurality of pressure generating means are attached to each other, and n heads each having a head chip having a common nozzle plate are combined. An ink jet recording apparatus is disclosed, in which the nozzle pitch of the head module is 1 / (2n) of the nozzle pitch of the ink droplet ejection substrate.

  However, in this ink jet recording apparatus, when the connector is used, the ink supply path and the waste liquid path in the ink jet recording head may be damaged due to stress (local load) when the connector is attached / detached. Further, the problem that impedance mismatch occurs in the connector portion cannot be solved.

  Further, in Japanese Patent Application Laid-Open No. 2005-225098 (Patent Document 3), a die unit (ink jet recording head) is fitted into an opening of a base to form a head array unit, and the die unit is a fitting portion with the base. As a head array unit, the die unit and the base are electrically connected by fitting, and the base with electric wiring incorporated therein is integrated with a highly rigid support. The technology formed is disclosed.

  However, this proposal does not consider the workability and maintainability when the inkjet recording head is replaced alone. Furthermore, the alignment method between the die unit (inkjet recording head) and the head array unit is not specified, and since the replacement unit is the head array unit, the number of parts at the time of replacement increases, and the work There is a problem that the cost is high and the cost of waste becomes large.

  An object of the present invention is to facilitate a replacement operation of an ink jet recording head in a line ink jet recording head module composed of a plurality of ink jet recording heads and prevent problems occurring during the operation. Is to provide.

In order to achieve the above object, the present invention is a line type ink jet recording head module in which a plurality of ink jet recording heads are arranged in a line,
A drive control board for transmitting drive waveforms and image data to the ink jet recording head is provided with a plurality of through holes in the same size as the outer periphery size of the head portion of the ink jet recording head, and each head is provided in each through hole. It is characterized by fitting and fixing the part.

  The present invention is configured as described above, and can facilitate the head replacement work of the line type ink jet recording head module composed of a plurality of ink jet recording heads, and prevent problems occurring during the work.

1 is a perspective view of an ink jet recording head module according to an embodiment of the present invention. It is the side view which carried out a cross section of a part of the ink jet recording head module. FIG. 3 is an exploded perspective view of the vicinity of an inkjet recording head, a drive control board, and an adjustment plate in the inkjet recording head module. It is a figure for demonstrating the arrangement configuration of the inkjet recording head in the inkjet recording head module. It is an enlarged bottom view of the inkjet recording head. It is a disassembled perspective view of the head part in the inkjet recording head. 1 is a schematic configuration diagram of an ink jet recording apparatus according to an embodiment of the present invention. It is a perspective view of an ink jet recording head module used in a conventional line type ink jet recording apparatus. It is the side view which carried out a cross section of a part of the ink jet recording head module.

The present invention has the following features.
(1) A line type ink jet recording head module in which a plurality of ink jet recording heads are arranged in a line, and the head of the ink jet recording head is provided on a drive control board for transmitting drive waveforms and image data to the ink jet recording head. A plurality of through holes having the same size as the outer peripheral size of the part are provided in a line shape, and the head part is fitted and fixed in each through hole.
Thereby, the head replacement | work operation | work of an inkjet recording head can be facilitated and the malfunction which generate | occur | produces at the time of a work | work can be prevented.

  (2) An adjustment plate is integrally bonded to one side of the drive control board, and a plurality of through holes are provided at the same position as the drive control board of the adjustment plate, so that the head portion of the ink jet recording head is a through hole of the drive control board. To the through hole of the adjustment plate.

  The drive control board is generally formed of a glass epoxy resin and has a low mechanical strength. Therefore, the drive control board may be bent by a stress when the ink jet recording head is attached or detached. In addition, since the tolerance of the outer shape (through hole) of the drive control board is as large as about ± 0.2 mm, it is difficult to achieve highly accurate alignment of the ink jet recording head.

  Therefore, by bonding the adjustment plate and the drive control board, the mechanical strength can be maintained and the alignment of the ink jet recording head can be adjusted easily and with high accuracy.

  (3) By providing the first metal plug part on the drive control board and providing the second metal plug part on the head board on which the ink jet recording head is mounted, and overlapping the drive control board and the head board. The first metal plug part and the second metal plug part are brought into contact with each other, and the drive control board and the ink jet recording head are electrically connected.

  As a result, the drive control board and the ink jet recording head can be electrically connected without using a connector, a flat cable, etc., the head replacement work of the ink jet recording head is facilitated, and problems occurring during the work are prevented. be able to.

(4) The drive waveform wired between the drive control board and the ink jet recording head and the copper foil pattern for image data signal are impedance matched.
By reducing the number of metal contact portions as much as possible (suppressing it to one place), impedance mismatching of the inter-substrate signal transmission path is less likely to occur, so that signal transmission reliability can be improved.

  (5) The ink jet recording head has a number of nozzles, a number of pressure chambers that communicate with the nozzles and store ink, a number of piezoelectric elements that pressurize each pressure chamber and eject ink from the nozzles, and serial transfer An image data control element for converting the image data signal to be transferred into parallel transfer and a piezoelectric element driving element for inputting a driving waveform to the piezoelectric element in accordance with the image data signal are mounted.

(6) In an ink jet recording apparatus comprising a line type ink jet recording head module and a recording medium transporting means for transporting a recording medium to the ink jet recording head module, the line type ink jet recording head module is the above (1) to The line-type ink jet recording head module according to any one of (5) is described below with reference to the drawings. FIG. 7 is a schematic configuration diagram of the ink jet recording apparatus X according to the embodiment of the present invention. As shown in the figure, the inkjet recording apparatus X is disposed between the paper supply unit 2 and the paper collection unit 13.

  A continuous long recording paper (recording medium) 1 fed out from the paper supply unit 2 at a high speed is formed with a desired color image by the ink jet recording device 14, and is sequentially wound and collected by the paper collection unit 13. The

  The sheet conveying device in the inkjet recording apparatus X includes a regulation guide 3 for positioning the recording sheet 1 supplied from the sheet supply unit 2 in the width direction, an infeed unit 4 composed of a driving roller and a driven roller, and a recording sheet. A dancer roller 5 that moves up and down in response to a tension of 1 and outputs a position signal; an EPC (Edge Position Control) 6 that controls the meandering of the recording paper 1; a meandering amount detector 7 that is used for feedback of the meandering amount; Is composed of a driving roller and a driven roller that rotate at a constant speed to convey the recording paper 1 and a puller 12 that includes a driving roller and a driven roller for discharging the recording paper 1 out of the apparatus. ing.

  This sheet conveying apparatus is a tension control type conveying apparatus that detects the position of the dancer roller 5 and controls the rotation of the infeed unit 4 based on the position detection signal to keep the tension of the recording sheet 1 being conveyed constant. is there.

  In the inkjet recording apparatus X, an inkjet recording head module 68, a platen 9 disposed so as to face the inkjet recording head module 68, and a drying means 10 are provided.

  The ink jet recording head module 68 has a line type ink jet recording head in which nozzles are arranged over the entire printing width, and color printing is performed by black, cyan, magenta, and yellow ink jet recording heads, and the nozzle surface of each ink jet recording head Is supported on the platen 9 with a predetermined gap. A color image is formed on the recording paper 1 by the ink jet recording head module 68 ejecting ink droplets in synchronization with the paper transport speed. A detailed configuration of the inkjet recording head module 68 will be described later with reference to FIGS.

  The drying means 10 is for fixing the ink provided for printing by the ink jet recording head module 68 to the recording paper 1. In this embodiment, the drying means 10 uses a non-contact drying device slightly separated from the recording paper 1, but may be a contact-type drying device.

  Next, an ink jet recording head module 68 according to an embodiment of the present invention will be described mainly with reference to FIGS. FIGS. 1 and 2 are a perspective view and a side view of a section of the inkjet recording head module 68. FIG. 3 is an exploded perspective view of the inkjet recording head module 68 in the vicinity of the inkjet recording head 75, the drive control board 78, and the adjustment plate 20. FIG.

  As shown in FIG. 1, the ink jet recording head module 68 mainly includes one drive control board 78, a plurality of ink jet recording heads 75, and one hard adjustment plate 20.

  The drive control board 78 is a rigid board on which a drive waveform for driving a piezoelectric element 53 (described later) in the ink jet recording head 75 and a circuit for generating an image data signal are mounted.

  The ink jet recording head 75 ejects ink droplets onto the recording paper 1 in accordance with the drive waveform transmitted from the drive control board 78 and the command value of the image data signal. The following points are different from the conventional inkjet recording head module 8.

As shown in FIG. 2, the lower surface (solder surface) of the drive control board 78 and the upper surface of the adjustment plate 20 are bonded together by an electrically insulating adhesive or the like to be integrated. Then, through holes (non-through holes) 63 and 65 having the same size as the outer peripheral size of the head portion 35 of the ink jet recording head 75 are formed on the drive control board 78 and the adjustment plate 20 in the vertical direction (same position). It is provided in a line shape for 75 pieces.
2 and 3, the head portion 35 of the ink jet recording head 75 is inserted and fitted into the plurality of through holes 63 and 65 and fixed.

Since metal contact portions (described later) are provided on the contact surfaces of the drive control board 78 and the head board 76, the electrical connection between the drive control board 78 and the ink jet recording head 75 without using connectors and flat cables. Connection can be achieved.
In this embodiment, a maximum of 16 inkjet recording heads 75 can be mounted on a single drive control board 78 for drive control.

  A detailed configuration of the drive control board 78 and the ink jet recording head 75 will be described with reference to FIG. In order to simplify the drawing, the drive control board 78 and the ink jet recording head 75 are illustrated in a one-to-one relationship.

  The drive control board 78 includes a D / A converter (not shown), an operational amplifier (not shown), a MOSFET 21, a cooling fin 22, an electrolytic capacitor 23, an image data signal driver IC 24, and the like, as in the past.

  The difference from the prior art is that the connector 25 for attaching and detaching the flat cable 19 is deleted, and the first metal plug portion 37 that is electrically connected to the inkjet recording head 75 is provided at the end portion (part) of the drive control board 78. It is a point provided.

  As shown in FIG. 2, the ink jet recording head 75 includes an image data signal receiver IC 29, an ink tank 33, a head substrate 76, a head portion 35, and the like. The first difference from the prior art is that the image data control board 30 and the flexible printed board 31 (both see FIG. 9) are deleted, and the image data signal receiver IC 29 is mounted on the head board 76.

The second difference is that the connector 26 (see FIG. 9) for attaching and detaching the flat cable 19 is deleted, and a second for electrically connecting the drive control board 78 to the end (part) of the head board 76. This is that a metal connector 38 is provided.
The connection configuration of the metal connector portions 37 and 38, the drive control board 78, the head board 34, and the adjustment plate 20 will be described later with reference to FIG.

  When replacing a specific (one) inkjet recording head 75 from among the plurality of inkjet recording heads 75 mounted on the drive control board 78 and the adjustment plate 20, there is no flat cable 19 as compared with the conventional case. The cable 19 does not need to be attached / detached, there is no defect associated with the replacement work, and the ink jet recording head 75 can be easily replaced.

  Also in the embodiment of the present invention, it is necessary to match the impedance to the driving waveform and the copper foil pattern 61 (see FIG. 3) for the image data signal, as in the prior art. In this embodiment, the signal is transmitted to the head unit 35 via the drive control board 78 → the head board 34. Therefore, since each component can be minimized, impedance mismatching hardly occurs, and signal transmission characteristics (reliability) are improved.

  Next, with reference to FIG. 3, the connection configuration of the metal connector portions 37 and 38, the drive control board 78, the head board 76, and the adjustment plate 20 will be described.

  Two reference pins 64 arranged with high accuracy are provided upright on both sides of a rectangular through hole 65 formed in the adjustment plate 20. Further, two reference holes 60 are formed on both sides of the head substrate 76, and two reference holes 62 are formed on both sides of the rectangular through hole 63 formed in the drive control board 78.

  When mounting the drive control board 78 and the inkjet recording head 75 on the adjustment plate 20, the reference hole 62 of the drive control board 78 and the reference hole 60 of the head board 76 are fitted into the reference pins 64 of the adjustment plate 20 in order. A structure in which the screw 59 is screwed into the reference pin 64 from above is adopted.

The reason for using the hard adjustment plate 20 in this embodiment is as follows.
(1) The drive control board 78 is generally formed of glass epoxy resin or the like and has low mechanical strength.
(2) The drive control board 78 may be bent by the stress when the ink jet recording head 75 is attached or detached.
(3) The tolerance of the outer shape (through hole 62) of the drive control board 78 is also as large as about ± 0.2 mm.
(4) This is because it is difficult to achieve highly accurate alignment of the inkjet recording head 75.

  Therefore, the adjustment plate 20 and the drive control board 78 are bonded together to increase the mechanical strength against the stress when the ink jet recording head 75 is attached and detached, and to facilitate the positioning of the ink jet recording head 75.

  The drive control board 78 and the adjustment plate 20 are provided with through holes 63 and 65 having the same size as the outer periphery size of the head part 35 of the ink jet recording head 75, and the head part 35 is fitted into the through holes 63 and 65. It is structured to be fixed with.

  Further, as shown in FIG. 3, the impedance-matched copper foil pattern 61 is connected to the first metal plug portion 37 provided on the end portion (part) of the drive control board 78. . On the other hand, the image data signal receiver IC 29 mounted on the head substrate 76 is connected to a second metal plug portion 38 provided at an end (part) of the head substrate 76. The metal plugs 37 and 38 are formed in a conductive pattern as shown in FIG.

  When the drive control board 78 and the head board 76 are aligned and fixed by the reference pins 62 of the adjustment plate 20, as shown in FIG. 2, the first metal plug 37 and the second metal are connected. The plug portions 38 are overlapped and in contact with each other. Accordingly, the drive control board 78 and the head board 76 (head part 35) are electrically connected via the metal plug parts 37 and 38.

FIG. 4 is a view for explaining an arrangement configuration of the ink jet recording head 75.
As shown in the figure, the ink jet recording head module 68 in the present embodiment ejects black head arrays 14K for ejecting black ink droplets, cyan head array 14C for ejecting cyan ink droplets, and magenta ink droplets. The magenta head array 14M is composed of an aggregate of yellow head arrays 14Y that discharge yellow ink droplets.

  Each head array 14K, 14C, 14M, 14Y extends in a direction orthogonal to the conveyance direction (arrow direction) of the recording paper 1 as shown in FIG. A wide print area width is secured by arraying the heads in this way.

  Further, each of the head arrays 14K, 14C, 14M, and 14Y is arranged on the adjustment plate 20 by a plurality of ink jet recording heads 75. In this embodiment, the ink jet recording heads 75 are arranged for each row (one color). Are arranged.

FIG. 5 is an enlarged bottom view of the ink jet recording head 75.
As shown in the figure, a large number of nozzles 16 are arranged in a staggered pattern on the nozzle surface (bottom surface) 17 of the ink jet recording head 75. In this embodiment, 64 nozzles 16 are arranged in a staggered manner in each of two rows. ing. In this way, a large number of nozzles 16 are arranged in a staggered manner to support high resolution.

FIG. 6 is an exploded perspective view of the head portion 35.
As shown in FIG. 6, the head portion 35 mainly includes a nozzle plate 40, a pressure chamber plate 41, a restrictor plate 43, a diaphragm plate 45, a rigid plate 50, and a piezoelectric element group 52.

A nozzle plate 40 in which a large number of nozzles 16 are arranged and formed in a staggered manner, a pressure chamber plate 41 in which a pressure chamber 42 corresponding to each nozzle 16 is formed, a common ink channel 48 and the pressure chamber 42 are communicated. A restrictor plate 43 formed with a restrictor 44 for controlling the ink flow rate to the pressure chamber 42 and a diaphragm plate 45 provided with a vibration plate 47 and a filter 46 are sequentially stacked, positioned, and joined to form an ink flow path unit. Is configured.
This ink flow path unit is joined to the rigid plate 50, and the opening of the common ink flow path 48 is covered with the filter 46.

  The upper opening end of the ink introduction pipe 51 is connected to the common ink flow path 48 of the rigid plate 50, and the lower opening end of the ink introduction pipe 51 is connected to the ink tank 33 shown in FIG.

  A piezoelectric element group 52 configured by arranging a large number of piezoelectric elements 53 on the piezoelectric element support substrate 54 is inserted from an opening 49 provided in the rigid plate 50, and the free end of each piezoelectric element 53 is connected to the diaphragm 47. By adhering and fixing to the head portion 35, the head portion 35 is configured.

  The piezoelectric element support substrate 54 is provided with electrode pads 56 for connection to the head substrate 34 shown in FIG. 2, and is electrically connected to the head substrate 34 by soldering. In addition, a piezoelectric element driving IC 55 for inputting a driving waveform to the piezoelectric element 53 in accordance with an image data signal transmitted in parallel from the image data signal receiver IC 29 is mounted on the piezoelectric element support substrate 54.

  Reference numeral 58 in the figure denotes a copper foil pattern for electrically connecting the piezoelectric element 53 and the piezoelectric element driving IC 55. Reference numeral 57 denotes a piezoelectric element connection electrode pad for electrically connecting the piezoelectric element 53 and the copper foil pattern 58 and bonding the piezoelectric element 53 and the piezoelectric element support substrate 54 together.

  In FIG. 6, in order to simplify the drawing, the number of nozzles 16, pressure chambers 42, restrictors 44, piezoelectric elements 53, and the like are reduced. Since the description of the ink droplet ejection operation in the head unit 35 is generally known, a description thereof will be omitted.

1: Recording paper (recording medium),
16: Nozzle,
20: Adjustment plate
29: Image data signal receiver IC,
34: head substrate,
35: head part,
37: 1st metal plug part,
38: Second metal plug part,
42: pressure chamber,
53: Piezoelectric element,
61: Copper foil pattern,
63, 65: through holes,
68: Inkjet recording head module,
75: Inkjet recording head,
76: Head substrate,
78: Drive control board,
X: Inkjet recording apparatus.

International Publication WO 2004/022344 JP 2007-90691 A JP 2005-225098 A

Claims (6)

A line type inkjet recording head module in which a plurality of inkjet recording heads are arranged in a line,
A drive control board for transmitting drive waveforms and image data to the ink jet recording head is provided with a plurality of through holes in the same size as the outer periphery size of the head portion of the ink jet recording head, and each head is provided in each through hole. A line-type ink jet recording head module characterized in that the portion is fitted and fixed. The line type inkjet recording head module according to claim 1,
An adjustment plate is integrally bonded to one side of the drive control board, and a plurality of through holes are provided at the same position as the drive control board of the adjustment plate, and the head portion extends from the through hole of the drive control board. A line type ink jet recording head module, which is fitted over a through hole of a plate. The line type inkjet recording head module according to claim 1,
By providing a first metal plug part on the drive control board and providing a second metal plug part on a head board on which the ink jet recording head is mounted, and superimposing the drive control board and the head board. A line type ink jet recording head module, wherein the drive control board and the ink jet recording head are electrically connected by bringing the first metal plug portion and the second metal plug portion into contact with each other. The line type inkjet recording head module according to claim 1,
A line type ink jet recording head module, wherein a drive waveform wired between the drive control board and the ink jet recording head and a copper foil pattern for an image data signal are impedance matched. The line type inkjet recording head module according to claim 1,
The inkjet recording head is
With many nozzles,
A number of pressure chambers that communicate with the nozzles and store ink;
A number of piezoelectric elements that pressurize each pressure chamber and eject ink from the nozzle;
An image data control element for converting serially transferred image data signals into parallel transfer;
An ink jet recording head module comprising: a piezoelectric element driving element that inputs a driving waveform to the piezoelectric element in accordance with the image data signal. A line-type inkjet recording head module;
In an inkjet recording apparatus provided with a recording medium conveying means for conveying a recording medium to the inkjet recording head module,
6. The ink jet recording apparatus according to claim 1, wherein the line ink jet recording head module is the line ink jet recording head module according to any one of claims 1 to 5.