JP2019107898A - Liquid jet head and liquid jet device - Google Patents

Abstract

To provide a liquid jet head including a passage member capable of achieving downsizing and securing a larger area in which a liquid passage can be arranged, and to provide a liquid jet device.SOLUTION: A liquid jet head includes: multiple head bodies 110 each having a liquid jet surface 20a for jetting an ink; COF substrates 98 each connected to the head body 110; and a passage member 200 provided with passages 240 for supplying inks to the respective head bodies 110. The passage member 200 has multiple openings 201 into which the COF substrates 98 are inserted. The COF substrate 98 extends at the passage member 200 side relative to the head body 110 and inclines to the first surface 98a side of double surfaces of the COF substrate 98 between the head body 110 and the passage member 200. The passage 240 is connected to the head body 110 at the second surface 98b side of the double surfaces of the COF substrate 98.SELECTED DRAWING: Figure 17

Description

  The present invention relates to a liquid jet head and a liquid jet apparatus, and more particularly to an ink jet recording head and an ink jet recording apparatus that jets ink as a liquid.

  As a liquid jet head, for example, a pressure generating chamber communicating with a nozzle opening for discharging an ink droplet is deformed by pressure generating means such as a piezoelectric element, and a head main body for discharging the ink droplet from the nozzle opening; There is known an ink jet recording head provided with a flow path member constituting a flow path of ink.

  The head body is connected to the flow path member so that ink from the flow path is supplied to the head body or ink from the head body is discharged to the flow path. Further, the flow passage member is provided with an opening through which the flexible wiring board is inserted, penetrating in the thickness direction. The flexible wiring board is inserted through the opening and connected to the pressure generating means of the head main body via a lead electrode. Furthermore, the flexible wiring board is connected to a connection board disposed on the side opposite to the head body of the flow path member. The connection substrate is connected to the control unit, and the control signal of the control unit is transmitted to the pressure generating means via the connection substrate and the flexible wiring substrate (see, for example, Patent Document 1).

JP 2012-81644 A

  On the other hand, the liquid jet head is required to be miniaturized along with high resolution, and the flow path member is also required to be miniaturized particularly in the horizontal plane parallel to the liquid jet surface.

  However, due to the miniaturization of the flow path member, an area in which the flow path can be formed becomes narrow in the flow path member except for the opening through which the flexible wiring board is inserted. That is, it becomes difficult to provide the flow passage member with a horizontal flow passage through which the ink flows in the horizontal plane. In addition, if the area in which the flow path of the flow path member can be formed is narrow, the freedom to draw the flow path is restricted, so it is also difficult to configure an optimal flow path according to the arrangement of the head body, for example. Become.

  Such a problem occurs not only in an ink jet recording head that discharges ink, but also in a liquid jet head and a liquid jet apparatus that jets a liquid other than ink.

  SUMMARY OF THE INVENTION In view of such circumstances, the present invention provides a liquid jet head and a liquid jet apparatus including a flow path member capable of achieving downsizing and securing a larger area where the liquid flow path can be disposed. With the goal.

According to an aspect of the present invention for solving the above-mentioned problems, there are provided a plurality of head bodies having a liquid ejection surface on which liquid is ejected, a flexible wiring board connected to each head body, and a flow for supplying liquid to each head body A flow path member provided with a passage, the flow path member having a plurality of openings through which the flexible wiring board is inserted, and the flexible wiring board is provided on the flow path member side with respect to the head main body The flow path is extended to the first surface side of the flexible wiring board between the head main body and the flow path member, and the flow path is the second of the both surfaces of the flexible wiring board. On the surface side, it has a portion provided along the liquid ejection surface, and a first channel and a second channel are connected to the head main body, and the first channel is connected to the first channel. On the 1 side, A first branch flow channel provided along the liquid ejection surface, and the second flow channel has a second branch flow channel disposed along the liquid ejection surface on the second surface side The first branch flow path is closer to the head main body in a direction perpendicular to the liquid ejection surface than the second branch flow path.
In this aspect, by inclining the flexible wiring substrate to the first surface side, the opening of the flow path member can also be moved to the first surface side, and the area of the flow path member can be formed densely Can be provided. Let P be a dense area on the first surface side than the opening of the flow passage member, and Q be a sparse area on the second surface side. As described above, since the flow path can be disposed in the wider area Q, it becomes easy to configure an optimal flow path according to the arrangement of the head main body and the like. In particular, when the flow path along the liquid ejection surface is provided, the flow path can be prevented from interfering with the flexible wiring board. Further, in order to prevent interference with the flexible wiring board, the width of the liquid jet head in the above-mentioned direction is made smaller as compared with the case where the flow path along the liquid injection surface is moved to the second surface side to widen the flow passage member. Can be
Furthermore, in the region Q, the second branch flow path can be formed in the flow path member with a higher degree of freedom as compared to the case where the first branch flow path close to the head main body is provided in the direction perpendicular to the liquid ejection surface. . In addition, since the plurality of flow paths can be arranged in an overlapping manner in the direction orthogonal to the liquid ejection surface, the shape of the liquid ejection head in the liquid ejection surface can be miniaturized.
Here, the first flow path connects the first branch flow path and the head main body on the first surface side and has a first vertical flow path extending in a direction perpendicular to the liquid ejection surface. Preferably, the second flow path has a second vertical flow path extending in a direction perpendicular to the liquid ejection surface, connecting the second branch flow path and the head main body on the second surface side. . According to this, the range of the first vertical flow passage and the second vertical flow passage occupied in the flow passage member in a plan view seen from the direction perpendicular to the liquid ejection surface is the first branch flow passage and the second branch flow passage. It is smaller than the range occupied by the flow path connecting each of the head main body obliquely. That is, by connecting the first branch channel and the second branch channel to the head main body respectively with the first vertical channel and the second vertical channel, the size of the channel member in the plan view can be reduced. It becomes possible.
Further, a plurality of head main bodies having a liquid ejection surface on which the liquid is ejected, a flexible wiring board connected to each of the head main bodies, and a flow path member provided with a flow path for supplying the liquid to each of the head main bodies And the flow path member has a plurality of openings through which the flexible wiring board is inserted, and the flexible wiring board is extended toward the flow path member with respect to the head body, and the head body And the flow path member is inclined to the first surface side of the both surfaces of the flexible wiring board, and the flow path is formed on the liquid ejection surface on the second surface side of the both surfaces of the flexible wiring board. A first flow path and a second flow path are connected to the head body, and the first flow path is formed on the first surface side of the flexible wiring board ,Previous A first branch flow channel provided in a direction parallel to the liquid ejection surface, and a first intersecting flow channel connected to the plurality of first branch flow channels, the second flow channel being the flexible On the second surface side of the wiring substrate, there is a second branch flow path provided in a direction parallel to the liquid ejection surface, and a second cross flow path connected to the plurality of second branch flow paths. It is preferable that the first intersecting flow path and the second intersecting flow path be on the opposite side to the flexible wiring board in the surface direction of the flexible wiring board. According to this, compared with the case where the branch flow channel is provided in the region P, the branch flow channel can be formed in the flow channel member with a higher degree of freedom. Further, since the intersecting flow paths are on the opposite side of the flexible wiring board in the surface direction of the flexible wiring board, the plural flow paths can be arranged without overlapping in the direction orthogonal to the liquid ejection surface, The shape of the liquid jet head in the direction orthogonal to the liquid jet surface can be miniaturized.
Further, the flexible wiring substrate has one end near the head main body in the direction perpendicular to the liquid ejection surface and the other end far from the head main body, and the other end is closer to the one end than the one end. It is preferable that the width in the surface direction of the flexible printed circuit is narrow, and the second flow channel is formed in the flow channel member so as to pass through the area outside the surface direction of the other end. According to this, it is possible to provide a region in which the second flow path is formed outside the flexible wiring substrate in the surface direction (direction parallel to the surface) of the flexible wiring substrate. As a result, the degree of freedom in arranging the second flow path in the flow path member is further improved.
Preferably, a drive circuit is provided on the second surface side of the flexible wiring board. According to this, by widening the width of the opening to the first surface side, the contact of the drive circuit with the inner surface of the opening can be more effectively suppressed, and the drive circuit can be protected. Then, even if the width of the opening is increased to the first surface side, the above-described dense area P side is further narrowed, and the sparse area Q side can be prevented from being narrowed.
Another aspect of the present invention is a liquid ejecting apparatus including the above-described liquid ejecting head.
In this aspect, there is provided the liquid ejecting apparatus including the flow path member capable of achieving downsizing and securing a larger area where the liquid flow path can be disposed.
Another aspect of the present invention for solving the above problems is to supply a liquid to each of the head main bodies, a plurality of head main bodies having a liquid ejection surface on which the liquid is ejected, a flexible wiring board connected to each head main body, And the flow path member has a plurality of openings through which the flexible wiring board is inserted, and the flexible wiring board is the flow path member with respect to the head main body. It is extended to the side, and is inclined to the first surface side of the both sides of the flexible wiring board between the head main body and the flow path member, and the flow path is formed of the both sides of the flexible wiring board A second aspect of the present invention is a liquid jet head including a portion provided along the liquid jet surface on the second surface side.
In this aspect, by inclining the flexible wiring substrate to the first surface side, the opening of the flow path member can also be moved to the first surface side, and the area of the flow path member can be formed densely Can be provided. Let P be a dense area on the first surface side than the opening of the flow passage member, and Q be a sparse area on the second surface side. As described above, since the flow path can be disposed in the wider area Q, it becomes easy to configure an optimal flow path according to the arrangement of the head main body and the like. In particular, when the flow path along the liquid ejection surface is provided, the flow path can be prevented from interfering with the flexible wiring board. Further, in order to prevent interference with the flexible wiring board, the width of the liquid jet head in the above-mentioned direction is made smaller as compared with the case where the flow path along the liquid injection surface is moved to the second surface side to widen the flow passage member. Can be

  Here, a first flow path and a second flow path are connected to the head body, and the first flow path is provided along the liquid ejection surface on the first surface side. The second flow path has a second branch flow path provided along the liquid ejection surface on the second surface side, and the first branch flow path has the first branch flow path. It is preferable that the second branch flow path be closer to the head main body in the direction orthogonal to the liquid ejection surface. According to this, in the region Q, the second branch flow path is formed in the flow path member with a higher degree of freedom as compared to the case where the first branch flow path close to the head main body is provided in the direction perpendicular to the liquid ejection surface. be able to. In addition, since the plurality of flow paths can be arranged in an overlapping manner in the direction orthogonal to the liquid ejection surface, the shape of the liquid ejection head in the liquid ejection surface can be miniaturized.

  In addition, the first flow path connects the first branch flow path and the head main body on the first surface side, and has a first vertical flow path extending in a direction perpendicular to the liquid ejection surface. It is preferable that the second flow path has a second vertical flow path extending in a direction perpendicular to the liquid ejection surface by connecting the second branch flow path and the head main body on the second surface side. According to this, the range of the first vertical flow passage and the second vertical flow passage occupied in the flow passage member in a plan view seen from the direction perpendicular to the liquid ejection surface is the first branch flow passage and the second branch flow passage. It is smaller than the range occupied by the flow path connecting each of the head main body obliquely. That is, by connecting the first branch channel and the second branch channel to the head main body respectively with the first vertical channel and the second vertical channel, the size of the channel member in the plan view can be reduced. It becomes possible.

  Further, a first flow path and a second flow path are connected to the head main body, and the first flow path is parallel to the liquid ejection surface on the second surface side of the flexible wiring board. A first branch channel provided in a direction and a first intersecting channel connected to the plurality of first branch channels, the second channel being the second of the flexible wiring board On the surface side, it has a second branch flow path provided in a direction parallel to the liquid ejection surface, and a second cross flow path connected to the plurality of second branch flow paths, and the first cross It is preferable that the flow path and the second intersecting flow path be on the opposite side to the flexible wiring board in the surface direction of the flexible wiring board. According to this, compared with the case where the branch flow channel is provided in the region P, the branch flow channel can be formed in the flow channel member with a higher degree of freedom. Further, since the intersecting flow paths are on the opposite side of the flexible wiring board in the surface direction of the flexible wiring board, the plural flow paths can be arranged without overlapping in the direction orthogonal to the liquid ejection surface, The shape of the liquid jet head in the direction orthogonal to the liquid jet surface can be miniaturized.

  Further, the flexible wiring substrate has one end near the head main body in the direction perpendicular to the liquid ejection surface and the other end far from the head main body, and the other end is closer to the one end than the one end. It is preferable that the width in the surface direction of the flexible printed circuit is narrow, and the second flow channel is formed in the flow channel member so as to pass through the area outside the surface direction of the other end. According to this, it is possible to provide a region in which the second flow path is formed outside the flexible wiring substrate in the surface direction (direction parallel to the surface) of the flexible wiring substrate. As a result, the degree of freedom in arranging the second flow path in the flow path member is further improved.

  Preferably, a drive circuit is provided on the second surface side of the flexible wiring board. According to this, by widening the width of the opening to the first surface side, the contact of the drive circuit with the inner surface of the opening can be more effectively suppressed, and the drive circuit can be protected. Then, even if the width of the opening is increased to the first surface side, the above-described dense area P side is further narrowed, and the sparse area Q side can be prevented from being narrowed.

Another aspect of the present invention is a liquid ejecting apparatus including the above-described liquid ejecting head.
In this aspect, there is provided the liquid ejecting apparatus including the flow path member capable of achieving downsizing and securing a larger area where the liquid flow path can be disposed.

FIG. 1 is a schematic perspective view of a recording apparatus according to Embodiment 1 of the present invention. FIG. 1 is an exploded perspective view of a head unit according to Embodiment 1 of the present invention. FIG. 2 is a bottom view of the head unit according to Embodiment 1 of the present invention. FIG. 1 is a plan view of a recording head according to Embodiment 1 of the present invention. FIG. 2 is a bottom view of the recording head according to Embodiment 1 of the present invention. FIG. 5 is a cross-sectional view taken along line A-A ′ of FIG. 4; FIG. 1 is an exploded perspective view of a head body according to Embodiment 1 of the present invention. Sectional drawing of the head main body which concerns on Embodiment 1 of this invention. The figure which showed typically arrangement | positioning of the nozzle opening of Embodiment 1 of this invention. The top view of the flow-path member (1st flow-path member) which concerns on Embodiment 1 of this invention. The top view of the 2nd channel member concerning Embodiment 1 of the present invention. The top view of the 3rd channel member concerning Embodiment 1 of the present invention. The bottom view of the 3rd channel member concerning Embodiment 1 of the present invention. The B-B 'sectional view taken on the line of FIGS. 11-13. The C-C 'sectional view taken on the line of FIGS. 11-13. The D-D 'sectional view taken on the line of FIGS. 11-13. FIG. 14 is a cross-sectional view taken along the line E-E ′ of FIGS. 11 to 13 and a cross-sectional view of a conventional head body. BRIEF DESCRIPTION OF THE DRAWINGS The schematic plan view of the head main body which concerns on Embodiment 1 of this invention.

Embodiment 1
The present invention will be described in detail based on embodiments. An ink jet recording head is an example of a liquid jet head, and is also simply referred to as a recording head. The ink jet recording head unit is an example of a liquid jet head unit, and may be simply referred to as a head unit. The ink jet recording apparatus is an example of a liquid ejecting apparatus. FIG. 1 is a perspective view showing a schematic configuration of the ink jet recording apparatus according to the present embodiment.

  As shown in FIG. 1, the ink jet recording apparatus 1 is a so-called line recording apparatus that includes a head unit 101 and carries out printing by conveying a recording sheet S such as paper as a jet receiving medium.

  Specifically, the ink jet recording apparatus 1 includes an apparatus main body 2, a head unit 101 having a plurality of recording heads 100, a conveying means 4 for conveying the recording sheet S, and a recording sheet S facing the head unit 101. And a supporting member 7 for supporting the In the present embodiment, the conveyance direction of the recording sheet S is the X direction. Further, in the liquid ejection surface where the nozzle openings of the head unit 101 are provided, the direction orthogonal to the X direction is taken as the Y direction. Furthermore, a direction orthogonal to the X direction and the Y direction is taken as the Z direction. Further, in the X direction, the upstream side for conveying the recording sheet S is the X1 side, the downstream side is the X2 side, one in the Y direction is the Y1 side, the other is the Y2 side, and the liquid ejection direction side in the Z direction (recording sheet S Side) is the Z1 side, and the opposite side is the Z2 side.

  The head unit 101 includes a plurality of recording heads 100 and a head fixing substrate 102 that holds the plurality of recording heads 100.

  The plurality of recording heads 100 are arranged in parallel in the Y direction which is a direction intersecting the X direction which is the transport direction, and fixed to the head fixing substrate 102. In the present embodiment, the plurality of recording heads 100 are arranged in parallel on a straight line in the Y direction. That is, the plurality of recording heads 100 are not arranged in the X direction. As a result, the width of the head unit 101 in the X direction can be narrowed, and the head unit 101 can be miniaturized.

  The head fixing substrate 102 holds the plurality of recording heads 100 such that the nozzle openings of the plurality of recording heads 100 face the recording sheet S, and is fixed to the apparatus main body 2.

  The conveying unit 4 conveys the recording sheet S in the X direction with respect to the head unit 101. The transport means 4 includes, for example, a first transport roller 5 and a second transport roller 6 provided on both sides of the head unit 101 in the X direction, which is the transport direction of the recording sheet S. The recording sheet S is conveyed in the X direction by the first conveyance roller 5 and the second conveyance roller 6. The conveyance means 4 for conveying the recording sheet S is not limited to the conveyance roller, and may be a belt, a drum or the like.

  The supporting member 7 supports the recording sheet S conveyed by the conveying unit 4 at a position facing the head unit 101. The support member 7 is made of, for example, metal or resin having a rectangular cross section, and is provided between the first conveyance roller 5 and the second conveyance roller 6 so as to face the head unit 101.

  Note that the support member 7 may be provided with a suction unit for suctioning the conveyed recording sheet S on the support member 7. As the suction means, for example, one suctioned and adsorbed by suctioning the recording sheet S, and one electrostatically adsorbed the recording sheet S by electrostatic force may be mentioned. Further, for example, when the transport unit 4 is a belt or a drum, the support member 7 supports the recording sheet S on the belt or the drum at a position facing the head unit 101.

  Although not shown, liquid storage means such as an ink tank or an ink cartridge storing ink is connected to each recording head 100 of the head unit 101 so as to be able to supply the ink. For example, the liquid storage means may be held on the head unit 101 or may be held at a position different from the head unit 101 in the apparatus main body 2. Further, a channel or the like for supplying the ink supplied from the liquid storage means to the recording head 100 may be provided in the inside of the head fixing substrate 102, and the head fixing substrate 102 is provided with an ink channel member. The ink from the liquid storage means may be supplied to the recording head 100 via the flow path member. Of course, the ink may be supplied directly from the liquid storage means to the recording head 100 without passing through the ink fixing member fixed to the head fixing substrate 102 or the head fixing substrate 102.

  In such an ink jet recording apparatus 1, the recording sheet S is conveyed in the X direction by the first conveyance roller 5, and printing is performed on the recording sheet S supported on the support member 7 by the head unit 101. The printed recording sheet S is conveyed by the second conveyance roller 6 in the X direction.

  The head unit 101 will be described in detail with reference to FIGS. 2 and 3. FIG. 2 is an exploded perspective view showing the head unit according to the present embodiment, and FIG. 3 is a bottom view of the liquid ejection surface side of the head unit.

  The head unit 101 of the present embodiment includes a plurality of recording heads 100 and a head fixing substrate 102 that holds the plurality of recording heads 100. The recording head 100 has a liquid ejection surface 20 a provided with a nozzle opening 21 on the Z1 side in the Z direction. Each recording head 100 is fixed on the side of the head fixing substrate 102 facing the recording sheet S, that is, on the Z1 side which is the recording sheet S side in the Z direction.

  As described above, the plurality of recording heads 100 are arranged on a straight line in the Y direction orthogonal to the X direction, which is the transport direction, and fixed to the head fixing substrate 102. That is, the plurality of recording heads 100 are not arranged in the X direction. As a result, the width of the head unit 101 in the X direction can be narrowed, and the head unit 101 can be miniaturized. Of course, the recording heads 100 arranged in parallel in the Y direction may be arranged to be shifted in the X direction, but when the recording head 100 is largely deviated in the X direction, the width of the head fixing substrate 102 etc. in the X direction is wide. turn into. As described above, when the size of the head unit 101 in the X direction increases, the distance between the first conveyance roller 5 and the second conveyance roller 6 in the ink jet recording apparatus 1 increases in the X direction, and the posture of the recording sheet S It becomes difficult to fix the In addition, the head unit 101 and the ink jet recording apparatus 1 increase in size.

  In the present embodiment, the four recording heads 100 are fixed to the head fixing substrate 102. However, the number of the recording heads 100 is not particularly limited as long as the number is two or more.

  The recording head 100 will be described with reference to FIGS. 2 and 4 to 6. FIG. 4 is a plan view of the recording head, FIG. 5 is a bottom view of the recording head, and FIG. 6 is a cross-sectional view taken along the line A-A 'of FIG. 4 is a plan view of the recording head 100 on the Z2 side in the Z direction, and the illustration of the holding member 120 is omitted.

  The recording head 100 includes a plurality of head bodies 110, a COF substrate 98 connected to each head body 110, and a flow path member 200 provided with a flow path for supplying ink to each head body. Furthermore, in the present embodiment, the recording head 100 includes the holding member 120 for holding the plurality of head main bodies 110, the fixing plate 130 provided on the liquid ejection surface 20a side of the head main body 110, and the relay substrate 140. .

  The head main body 110 is supplied with ink from the holding member 120 and the flow path member 200 provided with the ink flow path, and from the control unit (not shown) provided in the ink jet recording apparatus 1, the relay substrate 140 and the COF substrate A control signal is transmitted through 98, and an ink droplet is ejected based on the control signal. The detailed configuration of the head main body 110 will be described later.

  Each head main body 110 has a liquid ejection surface 20 a provided with a nozzle opening 21 on the Z1 side in the Z direction. Further, the Z2 side of the plurality of head main bodies 110 is bonded to the surface of the flow path member 200 on the Z1 side.

  The flow path member 200 is a member provided with a liquid flow path of the ink supplied to the head main body 110. Although the detailed configuration of the flow path member 200 will be described later, in the flow path member 200, a plurality of head main bodies 110 are arranged in parallel in the Y direction and adhered to the surface on the Z1 side. Further, the liquid flow path provided in the flow path member 200 communicates with the liquid flow path of each head main body 110, and the ink is supplied from the flow path member 200 to each head main body 110.

  In the present embodiment, six head bodies 110 are adhered to one flow passage member 200. Of course, the number of head main bodies 110 fixed to one flow passage member 200 is not limited to the one described above, and two or more head main bodies 110 may be provided for one flow passage member 200. There may be more than one.

  Further, the flow passage member 200 is provided with an opening 201 penetrating in the Z direction, and the COF substrate 98 whose one end is connected to the head main body 110 is inserted through the opening 201.

  The COF substrate 98 is an example of a flexible wiring substrate. The flexible wiring board is one in which a wiring is formed on a flexible substrate. The COF substrate 98 also includes a drive circuit 97 (see FIG. 7) for driving pressure generating means provided in the head main body 110.

  The relay substrate 140 is a substrate on the surface of which electrical components such as wiring, IC, and resistance are mounted, and is disposed between the holding member 120 and the flow path member 200. The relay substrate 140 is formed with a through portion 141 in communication with the opening 201 provided in the flow path member 200. The opening shape of each through portion 141 is formed larger than the opening portion 201 of the flow path member 200.

  The COF substrate 98 connected to the pressure generating means of the head main body 110 is inserted through the opening 201 and the penetrating portion 141 and is connected to a terminal (not shown) provided on the surface of the relay substrate 140 on the Z2 side. .

  Although not illustrated in particular, the relay substrate 140 is connected to the control unit of the ink jet recording apparatus 1. Therefore, drive signals and the like sent from the control unit are transmitted to the drive circuit 97 of the COF substrate 98 through the relay substrate 140, and the pressure generation means of the head main body 110 is driven by the drive circuit 97. Thus, the ink ejection operation of the recording head 100 is controlled.

  The holding member 120 has a holding portion 121 that forms a groove-shaped space on the Z1 side. The holding portion 121 is provided continuously on the surface on the Z1 side of the holding member 120 along the Y direction, and is provided so as to open on both side surfaces in the Y direction. Further, by providing the holding portion 121 at a substantially central portion in the X direction, the holding member 120 has the foot portions 122 formed on both sides of the holding portion 121 in the X direction. That is, the foot portions 122 are provided only on both end portions in the X direction on the surface on the Z1 side of the holding member 120, and are not provided on both end portions in the Y direction. In addition, although the holding member 120 consists of one member in this embodiment, it is not limited to such an aspect, A some member may be laminated | stacked and comprised in Z direction.

  The relay substrate 140, the flow path member 200, and the plurality of head main bodies 110 are accommodated in such a holding portion 121. Specifically, the head main bodies 110 are bonded to the surface of the flow path member 200 on the Z1 side with an adhesive or the like, and the relay substrate 140 is fixed to the surface of the flow path member 200 on the Z2 side. The relay substrate 140, the flow path member 200, and the plurality of head main bodies 110, which are integrally configured as described above, are accommodated in the holding portion 121.

  In the holding member 120 and the flow path member 200, surfaces of the holding portion 121 and the flow path member 200 facing each other in the Z direction are adhered by an adhesive. The relay substrate 140 is accommodated in a space sandwiched between the holding portion 121 and the flow path member 200. The holding member 120 and the flow path member 200 may be integrated by fixing means such as a screw instead of adhesion by an adhesive.

  Further, although not shown in the figure, the holding member 120 is formed with a flow path through which the ink flows, a filter for capturing foreign matter and the like, and the like. The flow channels of these holding members 120 communicate with the liquid flow channels of the flow channel member 200. Thus, the ink from the liquid storage means provided in the ink jet recording apparatus 1 is supplied to the head main body 110 through the holding member 120 and the flow path member 200.

  The fixing plate 130 is provided on the liquid ejection surface 20 a side of the recording head 100, that is, on the Z1 side of the recording head 100 in the Z direction, and is a member that holds the recording heads 100. The fixing plate 130 is formed, for example, by bending a plate-like member such as metal. Specifically, the fixing plate 130 includes a base portion 131 provided on the liquid ejection surface 20 a side and a bent portion 132 provided by bending both end portions of the base portion 131 in the Y direction to the Z2 side in the Z direction. Prepare.

  In addition, the base portion 131 is provided with an exposure opening portion 133 which is an opening for exposing the nozzle opening 21 of each head main body 110. In the present embodiment, the exposure opening 133 is provided so as to open independently for each head body 110. That is, since the recording head 100 of the present embodiment has six head main bodies 110, the base portion 131 is provided with six independent exposure openings 133. Of course, depending on the configuration and the like of the head main body 110, one common exposure opening 133 may be provided for the head main body group including the plurality of head main bodies 110.

  The Z1 side of the holding portion 121 of the holding member 120 is covered by such a base portion 131. As shown in FIG. 6, the base portion 131 is bonded to the Z1 side surface of the holding member 120 in the Z direction, that is, the end surface of the foot portion 122 on the Z1 side via an adhesive.

  The bent portions 132 are provided at both ends of the base portion 131 in the Y direction, and are formed to have a size that covers an opening area opened on the side surface of the holding portion 121 in the Y direction. That is, the bent portion 132 is a region from the end of the base portion 131 in the Y direction to the edge of the fixing plate 130. Such a bent portion 132 is bonded to the side surface of the holding member 120 in the Y direction via an adhesive. Thereby, the opening to the side surface in the Y direction of the holding portion 121 is covered and sealed by the bent portion 132.

  As described above, the fixing plate 130 is adhered to the holding member 120 with an adhesive, so that the head main body 110 is disposed in the holding portion 121 which is a space between the holding member 120 and the fixing plate 130.

  As described above, in the recording head 100 according to the present embodiment, a plurality of head main bodies 110 are provided for one recording head 100 to realize multiple nozzle rows, thereby providing the recording head 100 with respect to one recording head 100. The yield can be improved as compared with the case where multiple nozzle rows are provided by providing only one head main body 110. That is, to increase the number of nozzle rows in the single head body 110 reduces the yield of the head body 110 and increases the manufacturing cost. On the other hand, when the number of nozzle rows is increased by the plurality of head main bodies 110, the yield of the head main bodies 110 can be improved and the manufacturing cost can be reduced.

  Further, the opening at the side surface in the Y direction of the holding member 120 is sealed by the bent portion 132 of the fixing plate 130. As a result, even if there is no foot for bonding with the base portion 131 of the fixing plate 130 on both sides in the Y direction of the holding member 120 (the hatched portion shown in FIG. 3), It is possible to suppress water evaporation from the opening.

  Therefore, in the head unit 101 in which the recording heads 100 are arranged in parallel in the Y direction, the interval between the recording heads 100 adjacent in the Y direction should be narrowed because the foot portion 122 is not present on the recording head 100 side adjacent in the Y direction. Can. Thus, the head main bodies 110 of the recording heads 100 adjacent in the Y direction can be provided close to each other, and the nozzle openings 21 provided in the head main bodies 110 of the adjacent recording heads 100 are provided close in the Y direction. be able to.

  In the recording head 100 according to the present embodiment, the foot portions 122 are provided on both sides of the holding member 120 in the X direction, but the foot portions 122 may not be provided. That is, the head main body 110 may be adhered to the surface on the Z1 side of the holding member 120, and the bent portions 132 may be provided on both sides in the X direction and the Y direction of the fixing plate 130. That is, the fixed plate 130 is provided with the bent portion 132 over the entire periphery in the in-plane direction of the liquid injection surface 20 a, and the fixed plate 130 is bonded over the entire periphery of the side surface of the holding member 120. It is also good. However, by providing the foot portions 122 on both sides of the holding member 120 in the X direction as in the present embodiment, the end face on the Z1 side of the foot portions 122 is adhered to the base portion 131 of the fixing plate 130, thereby achieving ink jet recording. The strength of the head 100 in the Z direction can be improved, and evaporation of water from the foot 122 can be suppressed.

  The head main body 110 will be described with reference to FIGS. 7 and 8. FIG. 7 is a perspective view of the head main body according to the present embodiment, and FIG. 8 is a cross-sectional view of the head main body in the Y direction. Of course, the configuration of the head main body 110 is not limited to the following configuration.

  The head main body 110 of the present embodiment includes a pressure generating chamber 12, a nozzle opening 21, a manifold 95, pressure generating means, and the like. Therefore, a plurality of members such as the flow path forming substrate 10, the communication plate 15, the nozzle plate 20, the protective substrate 30, the compliance substrate 45, and the case 40 are joined by an adhesive or the like.

  In the flow path forming substrate 10, pressure generating chambers 12 partitioned by a plurality of partition walls are arranged in parallel along the arranging direction of the plurality of nozzle openings 21 by performing anisotropic etching from one surface side. In the present embodiment, the direction in which the pressure generating chambers 12 are juxtaposed is referred to as the Xa direction. Further, in the flow path forming substrate 10, a plurality of rows in which the pressure generating chambers 12 are arranged in parallel in the Xa direction are provided in two rows in the present embodiment. The direction in which the plurality of rows of pressure generating chambers 12 are arranged is hereinafter referred to as the Ya direction. In the present embodiment, the direction orthogonal to the Xa direction and the Ya direction coincides with the Z direction. In addition, the head main body 110 of the present embodiment is mounted on the head unit 101 such that the Xa direction, which is the direction in which the nozzle openings 21 are juxtaposed, is inclined with respect to the X direction, which is the conveyance direction of the recording sheet S. Ru.

  Further, the flow path forming substrate 10 has an opening area smaller than that of the pressure generating chamber 12 on one end side of the pressure generating chamber 12 in the Ya direction, and applies flow resistance of ink flowing into the pressure generating chamber 12. A supply path or the like may be provided.

  A communication plate 15 is joined to one side of the flow path forming substrate 10. Further, a nozzle plate 20 provided with a plurality of nozzle openings 21 communicating with the pressure generating chambers 12 is joined to the communication plate 15. In the present embodiment, the Z1 side in the Z direction where the nozzle openings 21 of the nozzle plate 20 open is the liquid ejection surface 20a.

  The communication plate 15 is provided with a nozzle communication passage 16 communicating the pressure generating chamber 12 with the nozzle opening 21. The communication plate 15 has an area larger than the flow path forming substrate 10, and the nozzle plate 20 has an area smaller than the flow path forming substrate 10. By thus reducing the area of the nozzle plate 20 relatively, the cost can be reduced.

  Further, the communication plate 15 is provided with a first manifold 17 and a second manifold 18 which constitute a part of the manifold 95. The first manifold 17 is provided to penetrate the communication plate 15 in the Z direction. The second manifold 18 is opened on the side of the nozzle plate 20 of the communication plate 15 without penetrating the communication plate 15 in the Z direction, and provided halfway to the Z direction.

  Further, in the communication plate 15, a supply communication passage 19 communicating with one end of the pressure generating chamber 12 in the Y direction is provided independently for each pressure generating chamber 12. The supply communication passage 19 communicates the second manifold 18 with the pressure generation chamber 12.

  In the nozzle plate 20, a nozzle opening 21 communicating with each pressure generating chamber 12 via a nozzle communication passage 16 is formed. A plurality of nozzle openings 21 are juxtaposed in the Xa direction, and the juxtaposed nozzle openings 21 form two nozzle rows a and b, and the nozzle rows a and b are juxtaposed in the Ya direction ing. In the present embodiment, although the details will be described later, each of the nozzle row a and the nozzle row b can be divided into two and can jet two types of liquid in one row.

  On the other hand, a diaphragm 50 is formed on the side of the flow path forming substrate 10 opposite to the communication plate 15. In addition, the piezoelectric actuator 300 which is a pressure generating unit of the present embodiment is configured by sequentially laminating the first electrode 60, the piezoelectric layer 70, and the second electrode 80 on the vibrating plate 50. Generally, one of the electrodes of the piezoelectric actuator 300 is used as a common electrode, and the other electrode and the piezoelectric layer are patterned for each pressure generating chamber 12.

  Further, a protective substrate 30 having substantially the same size as the flow path forming substrate 10 is bonded to the surface of the flow path forming substrate 10 on the piezoelectric actuator 300 side. The protective substrate 30 has a holding portion 31 which is a space for protecting the piezoelectric actuator 300. Further, the protective substrate 30 is provided with a through hole 32 penetrating in the Z direction. The end of the lead electrode 90 drawn from the electrode of the piezoelectric actuator 300 is extended so as to be exposed in the through hole 32, and the lead electrode 90 and the COF substrate 98 are electrically connected in the through hole 32. It is done.

  Further, a case 40 defining a manifold 95 communicating with the plurality of pressure generating chambers 12 is fixed to the protective substrate 30 and the communication plate 15. The case 40 has substantially the same shape as the communication plate 15 described above in plan view, and is joined to the protective substrate 30 and also to the communication plate 15 described above. Specifically, the case 40 has a recess 41 with a depth at which the flow path forming substrate 10 and the protective substrate 30 are accommodated on the side of the protective substrate 30. The recess 41 has an opening area larger than the surface of the protective substrate 30 joined to the flow path forming substrate 10. The opening surface on the nozzle plate 20 side of the recess 41 is sealed by the communication plate 15 in a state in which the flow passage forming substrate 10 and the like are accommodated in the recess 41. Thus, a third manifold 42 is defined at the outer peripheral portion of the flow path forming substrate 10 by the case 40, the flow path forming substrate 10, and the protective substrate 30. The third manifold 42 and the first manifold 17 and the second manifold 18 provided in the communication plate 15 constitute a manifold 95 according to the present embodiment. As described above, since two types of liquid can be jetted by one nozzle row, the first manifold 17, the second manifold 18 and the third manifold 42 constituting the manifold 95 each have a nozzle row. It is divided into two in the direction, that is, the Xa direction. For example, as shown in FIG. 7, the first manifold 17 comprises a first manifold 17a and a first manifold 17b. Similarly, the second manifold 18 and the third manifold 42 are also divided into two, and the entire manifold 95 is also divided into two in the Xa direction.

  In the present embodiment, the first manifold 17, the second manifold 18, and the third manifold 42 constituting the manifold 95 are disposed symmetrically with respect to the nozzle row a and the nozzle row b, respectively. According to this, it is also possible to eject different liquids for each of the nozzle row a and the nozzle row b. Of course, the arrangement of the manifold is not limited to this.

  Further, in the present embodiment, the manifold corresponding to each nozzle row is divided into two in the Xa direction to form four manifolds 95 in total so that four types of liquid can be jetted as described later. Alternatively, a manifold may be formed for each nozzle row b, or a common manifold may be used for two rows of the nozzle row a and the nozzle row b.

  Further, a compliance substrate 45 is provided on the surface of the communication plate 15 on which the first manifold 17 and the second manifold 18 are opened. The compliance substrate 45 seals the openings of the first manifold 17 and the second manifold 18.

  Such a compliance substrate 45 includes a sealing film 46 and a fixed substrate 47 in the present embodiment. The sealing film 46 is formed of a flexible thin film (for example, polyphenylene sulfide (PPS), stainless steel (SUS), or the like). The fixed substrate 47 is formed of a hard material such as metal such as stainless steel (SUS). The region of the fixed substrate 47 facing the manifold 95 is an opening 48 completely removed in the thickness direction, so that one surface of the manifold 95 is sealed only by the flexible sealing film 46. It is the compliance part 49 which is a flexible part.

  Further, the fixing plate 130 is bonded to the side opposite to the communication plate 15 of the compliance substrate 45. That is, the exposure opening 133 provided in the base 131 of the fixing plate 130 has an opening area larger than the area of the nozzle plate 20, and exposes the liquid injection surface 20 a of the nozzle plate 20 in the exposure opening 133. . Of course, the fixing plate 130 is not limited to this. For example, the exposed opening 133 of the fixing plate 130 has an opening area smaller than the outer shape of the nozzle plate 20, and the fixing plate 130 is in contact with the liquid injection surface 20 a of the nozzle plate 20. You may make it contact or adhere. Further, even when the exposed opening 133 of the fixing plate 130 has an opening area smaller than the outer diameter of the nozzle plate 20, the fixing plate 130 and the liquid injection surface 20a may not be in contact with each other. That is, that the fixing plate 130 is provided on the liquid ejection surface 20 a side includes one that is not in contact with the liquid ejection surface 20 a and one that is in contact with the liquid ejection surface 20 a.

  The case 40 is provided with an introduction path 44 communicating with the manifold 95 and supplying ink to each manifold 95. Further, the case 40 is provided with a connection port 43 communicating with the through hole 32 of the protective substrate 30 and through which the COF substrate 98 is inserted.

  In the head main body 110 having such a configuration, when the ink is ejected, the ink is taken in from the storage means via the introduction path 44, and the inside of the flow path is filled with the ink from the manifold 95 to the nozzle opening 21. Thereafter, a voltage is applied to each of the piezoelectric actuators 300 corresponding to the pressure generating chamber 12 in accordance with the signal from the drive circuit 97, thereby bending and deforming the diaphragm together with the piezoelectric actuator 300. As a result, the pressure in the pressure generation chamber 12 is increased, and the ink droplet is ejected from the predetermined nozzle opening 21.

  Here, with reference to FIGS. 5 and 9, the direction in which the nozzle openings 21 forming the nozzle row of the head main body 110 are juxtaposed is provided inclined with respect to the X direction which is the conveyance direction of the recording sheet S. The points will be described in detail. FIG. 9 is an explanatory view schematically showing the arrangement of the nozzle openings of the head main body according to the present embodiment.

  The plurality of head main bodies 110 are fixed such that the nozzle array a and the nozzle array b are inclined with respect to the X direction which is the conveyance direction of the recording sheet S in the in-plane direction of the liquid ejection surface 20a. The nozzle array referred to here is one in which a plurality of nozzle openings 21 are arranged in parallel in a predetermined direction. In the present embodiment, the liquid ejection surface 20a is provided with two rows of the nozzle array a and the nozzle array b in which a plurality of nozzle openings 21 are arranged in the Xa direction as a predetermined direction. The Xa direction is a direction intersecting the X direction at an angle larger than 0 degrees and less than 90 degrees. Here, it is preferable that the X direction and the Xa direction intersect at an angle of more than 0 degree and less than 45 degrees. According to this, the distance D1 between the nozzle openings 21 in the Y direction can be made smaller and the recording head 100 with high resolution in the Y direction can be realized, as compared with the case of intersecting at an angle of more than 45 degrees and less than 90 degrees. it can. Of course, the X direction and the Xa direction may intersect at an angle of more than 45 degrees and less than 90 degrees.

  If the X direction and the Xa direction intersect at an angle of more than 0 ° and less than 45 °, the nozzle row is directed in the X direction rather than a straight line intersecting the X direction at 45 ° in the plane of the liquid ejection surface 20a. State of being inclined more Further, the interval D1 referred to here is an interval between the nozzle openings 21 when the nozzle openings 21 of the nozzle array a and the nozzle array b are projected in the X direction with respect to an imaginary line in the Y direction. Further, the distance between the nozzle openings 21 when the nozzle openings 21 of the nozzle array a and the nozzle array b are projected in the Y direction with respect to an imaginary line in the X direction is D2.

  Further, as shown in FIG. 9, in the present embodiment, two types of liquid can be ejected by one nozzle array and four types of liquid can be ejected by two nozzle arrays. That is, assuming that four colors of ink are used, for example, black Bk and magenta M can be jetted in the nozzle row a, and cyan C and yellow Y can be jetted in the nozzle row b. Further, the nozzle array a and the nozzle array b have the same number of nozzle openings 21, and the position of the nozzle openings 21 in the Y direction of the nozzle array a and the position of the nozzle openings 21 in the Y direction of the nozzle array b are Overlap in the X direction.

  The head main bodies 110a to 110c have similar nozzle arrays a and b, and the nozzle openings 21 of the head main bodies 110 adjacent to each other in the Y direction are provided by providing the head main bodies 110a to 110c in the Y direction. Are juxtaposed so as to overlap each other in the X direction. Therefore, for example, the nozzle row a of the magenta M and the nozzle row b of the yellow Y of the head body 110a overlap the nozzle row a of black Bk and the nozzle row b of cyan C in the X direction in the X direction. Four colors will be arranged in one line in the direction, and a color image can be printed. Similarly, the nozzle openings 21 of the head body 110b and the head body 110c adjacent to each other in the Y direction are arranged in parallel so as to overlap each other in the X direction.

  Furthermore, the image quality of the joint between the head bodies 110 is improved by arranging the nozzle openings 21 of at least a part of the nozzle rows of the same color that the adjacent head bodies 110 overlap with each other in the X direction. Can. That is, for example, one nozzle opening 21 of the nozzle row a of magenta M of the head main body 110a and one nozzle opening 21 of the nozzle row a of magenta M of the head main body 110b are arranged to overlap each other in the X direction. By controlling the ejection from the two overlapping nozzle openings 21, it is possible to prevent the deterioration of the image quality such as banding and streaks at the joint between the adjacent head main bodies 110. Further, in the example shown in FIG. 9, only one nozzle opening 21 overlaps in the X direction, but two or more nozzle openings 21 may overlap in the X direction.

  Of course, the arrangement of such colors is not limited to this. For example, although not shown in the drawing, four nozzles of black Bk, magenta M, cyan C and yellow Y may be arranged to be jetted by one nozzle row.

  As described above, four recording heads 100 each having a plurality of head main bodies 110 are fixed to the head fixing substrate 102 to constitute the head unit 101. However, as shown by the straight line L in FIG. Some of the nozzle rows are arranged to overlap each other in the X direction. That is, similar to the relationship between the adjacent head bodies 110 in one recording head 100, the adjacent head bodies 110 are provided adjacent to each other in the Y direction between the adjacent recording heads 100 in the Y direction. While being able to print a color image between 100, the image quality of the joint between the adjacent recording heads 100 can be improved. Of course, the number of nozzle openings 21 overlapping in the X direction between adjacent recording heads 100 does not have to be the same as the number of nozzle openings 21 overlapping in the X direction between head main bodies 110 in one recording head 100.

  As described above, by partially overlapping the nozzle array between the head main bodies 110 and the nozzle array between the recording heads 100 in the X direction, the image quality of the joint can be improved.

  Further, between the nozzle openings 21 adjacent to each other in the Xa direction of each nozzle row, the nozzle pitch and the angle between the X direction and the Xa direction are set such that the distance D1 in the X direction and the distance D2 in the Y direction become an integer ratio. Is preferred. According to this, when printing the image data which consists of the pixels arranged in the shape of a matrix in the X direction and the Y direction, correspondence with each nozzle and a pixel becomes easy. In addition, of course, it is not limited to such an integer ratio.

  As shown in FIG. 5, the recording head 100 of the present embodiment has a shape that is substantially parallelogram when viewed in plan from the liquid ejection surface 20 a side. This is because, as described above, the Xa direction, which is the direction in which the nozzle openings 21 forming the nozzle array a and the nozzle array b of each head main body 110 are arranged, is inclined with respect to the X direction which is the conveyance direction of the recording sheet S The outer shape of the recording head 100, that is, the fixing plate 130 is formed to be a substantially parallelogram in the same manner as the Xa direction in which the nozzle array a and the nozzle array b are inclined. It is. Of course, the shape of the recording head 100 in plan view from the liquid ejection surface 20 a side is not limited to a substantially parallelogram, and may be a trapezoidal rectangular shape, a polygonal shape, or the like.

  In the embodiment described above, an example in which two nozzle rows are provided in one head main body has been described, but the same effect as described above can be obtained even if three or more nozzle rows are provided. Needless to say. As in the present embodiment, when the number of nozzle rows provided in one head main body 110 is two, as shown in FIG. 7, each of the two manifolds 95 corresponding to the respective nozzle rows is separated. Since the nozzle openings 21 of the nozzle row can be arranged, compared with the case where the nozzle openings 21 of a plurality of nozzle rows are arranged on the same side with respect to the manifold corresponding to each nozzle row, the two nozzle rows The interval in the Ya direction can be narrowed. Therefore, the area required for one nozzle plate 20 can be reduced for two nozzle rows. Further, the connection between the piezoelectric actuator 300 and the COF substrate 98 in each of the two nozzle rows is also facilitated.

  Moreover, in the present embodiment, each of the nozzle rows a and b has the same number of nozzle openings 21. According to this, the overlap number in the X direction between the nozzle rows can be made the same, and efficient liquid ejection can be performed. However, the number of nozzle openings in each nozzle row does not have to be the same. Furthermore, the types of liquid ejected by the nozzle rows a and b may be all the same, for example, all the same color inks may be used.

  Moreover, in the present embodiment, it is preferable that the head main body 110 have one nozzle plate 20 for two nozzle rows. According to this, the arrangement of the nozzle rows can be realized with higher accuracy. Of course, another nozzle plate 20 may be provided for each nozzle row. The nozzle plate 20 is formed of a stainless steel (SUS) plate, a silicon substrate, or the like.

  The flow path member 200 according to the present embodiment will be described in detail with reference to FIGS. 10 to 16. FIG. 10 is a plan view of a first flow path member as the flow path member 200, FIG. 11 is a plan view of a second flow path member as the flow path member 200, and FIG. 13 is a plan view of the third flow path member, FIG. 13 is a bottom view of the third flow path member, FIG. 14 is a cross-sectional view taken along the line BB 'in FIG. 13 is a cross-sectional view taken along the line CC ′ of FIG. 13, and FIG. 16 is a cross-sectional view taken along the line DD ′ of FIGS. 10 to 12 are plan views on the Z2 side, and FIG. 13 is a bottom view on the Z1 side.

  The flow path member 200 is a member provided with a flow path 240 through which the ink flows. In this embodiment, the three first flow path members 210, the second flow path members 220 and the third flow path members 230, and the plurality of flow paths 240 stacked in the Z direction are provided. In the Z direction, the first flow path member 210, the second flow path member 220, and the third flow path member 230 are stacked in this order from the holding member 120 side (see FIG. 2) toward the head main body 110 side. Although not particularly illustrated, the first flow path member 210, the second flow path member 220, and the third flow path member 230 are bonded and fixed by an adhesive, but the present invention is not limited to such an embodiment. The first flow passage member 210, the second flow passage member 220, and the third flow passage member 230 may be integrated by means. Moreover, there is no limitation in particular in material, For example, it can form with metals and resin, such as SUS.

  The flow path 240 has, at both ends, an introduction flow path 280 into which the ink supplied from the upstream member (in the present embodiment, the holding member 120) is introduced, and a connection portion 290 serving as an outlet for supplying the ink to the head. It is a flow path. In the present embodiment, four flow paths 240 are formed, and in each flow path 240, ink is supplied to one introduction flow path 280, and the ink branches off halfway and the ink from the plurality of connection parts 290 is the head main body 110. Configured to supply

  Among the four flow paths 240, a part is a first flow path 241, and the rest is a second flow path 242. In the present embodiment, two first flow paths 241 and two second flow paths 242 are formed. Each of the two first flow paths 241 is referred to as a first flow path 241 a and a first flow path 241 b. Hereinafter, when describing as the 1st flow path 241, it shall point to both the 1st flow path 241a and the 1st flow path 241b. The same applies to the second flow path 242.

  The first flow path 241 includes a first introduction flow path 281. The first introduction channel 281 includes a first intersecting channel 251, which will be described later, of the first channel 241, and a channel upstream of the channel member 200 (in this embodiment, the channel of the holding member 120) It is a channel that connects the In the present embodiment, the two first flow paths 241a and the first flow paths 241b respectively have a first introduction flow path 281a and a first introduction flow path 281b.

  Specifically, the first introduction channel 281a is opened on the top surface of the protrusion 212 provided on the surface of the first channel member 210 on the Z2 side, and the through hole 211 penetrated in the Z direction; It is in communication with the through hole 221 penetrating in the Z direction of the flow path member 220. The same applies to the first introduction channel 281b. Hereinafter, when the first introduction channel 281 is described, it refers to the first introduction channel 281a and the first introduction channel 281b.

  The second flow path 242 includes a second introduction flow path 282. The second introduction channel 282 includes a second intersecting channel 252 described later in the second channel 242 and a channel upstream of the channel member 200 (in this embodiment, the channel of the holding member 120) It is a channel that connects the In the present embodiment, the two second flow paths 242a and the second flow paths 242b respectively have a second introduction flow path 282a and a second introduction flow path 282b.

  Specifically, the second introduction channel 282a is a through hole opened in the top surface of the protrusion 213 provided on the surface of the first channel member 210 on the Z2 side and penetrating in the Z direction. The same applies to the second introduction channel 282b. Hereinafter, the term “second introduction channel 282” refers to the second introduction channel 282a and the second introduction channel 282b.

  Furthermore, when it describes as the introductory flow path 280, all the four introductory flow paths mentioned above shall be pointed out.

  In the present embodiment, in the plan view shown in FIG. 10, the first introduction channel 281 a is disposed in the vicinity of the upper left corner of the first channel member 210, and the first introduction channel 281 a is disposed in the vicinity of the lower right corner of the first channel member 210. An introduction channel 281b is disposed. Further, in the plan view shown in FIG. 10, the second introduction passage 282a is disposed in the vicinity of the upper right corner of the first passage member 210, and the second introduction passage in the vicinity of the lower left corner of the first passage member 210. 282b is arranged.

  The first flow path 241 includes a first intersecting flow path 251 formed by the second flow path member 220 and the third flow path member 230. The first intersecting flow path 251 is a portion of the first flow path 241 that allows the ink to flow in a direction parallel to the liquid ejection surface 20 a. In the present embodiment, since two first flow paths 241 are formed, two first intersecting flow paths 251 are also formed. The two first intersecting channels 251 are respectively referred to as a first intersecting channel 251a and a first intersecting channel 251b.

  The first intersecting flow path 251a is formed on the Z1 side surface of the second flow path member 220 along the Y direction, and on the Z2 side surface of the third flow path member 230 along the Y direction. It is formed by sealing together the formed cross groove part 231a. The first intersecting flow path 251b is formed on the Z1 side surface of the second flow path member 220 along the Y direction, and on the Z2 side surface of the third flow path member 230 along the Y direction. It is formed by sealing together the formed cross groove part 231b.

  The first intersecting channels 251a, 251b are formed by forming the intersecting grooves 226a, 226b, 231a, 231b in the second channel member 220 and the third channel member 230 for any of the first intersecting channels 251a, 251b. The cross-sectional area of each of 251 b is expanded to reduce the pressure loss in the first intersecting flow path 251 a, 251 b. The first intersecting flow paths 251a and 251b may be formed by the intersecting groove portions 226a and 226b formed only in the second flow path member 220, or are formed in only the third flow path member 230. You may form by the cross groove part 231a, 231b. For example, by forming the intersecting groove portions 226a and 226b only in the second flow path member 220 on the Z2 side, as described later, the COF substrate 98 whose width in the Xa direction narrows from the Z1 side to the Z2 side; It is possible to improve the degree of freedom in disposing the first flow path 241 while preventing interference with the first intersecting flow paths 251a and 251b.

  The first intersecting flow path 251a and the first intersecting flow path 251b are disposed on both outer sides in the X direction of the opening 201 (third opening 235) through which the COF substrate 98 is inserted.

  The second flow path 242 includes a second intersecting flow path 252 formed by the first flow path member 210 and the second flow path member 220. The second intersecting flow path 252 is a portion of the second flow path 242 that allows the ink to flow in the direction parallel to the liquid ejection surface 20 a. In the present embodiment, since two second flow paths 242 are formed, two second cross flow paths 252 are also formed. The two second intersecting channels 252 are respectively referred to as a second intersecting channel 252 a and a second intersecting channel 252 b.

  The second intersecting flow path 252a is formed on the Z1 side surface of the first flow path member 210 along the Y direction, and on the Z2 side surface of the second flow path member 220 along the Y direction. It is formed by sealing together the formed cross groove 222a. The second intersecting flow path 252b is formed on the surface on the Z1 side of the first flow path member 210 and in the surface on the Z2 side of the second flow path member 220 along the Y direction. It is formed by sealing together with 222b.

  The second intersecting channels 252a, 252b are formed by forming the intersecting grooves 213a, 213b, 222a, 222b in the first channel member 210 and the second channel member 220, respectively. The cross-sectional area of each 252b is expanded, and the pressure loss in 2nd crossing flow path 252a, 252b is reduced. The second intersecting flow paths 252a and 252b may be formed only by the intersecting groove portions 213a and 213b formed only in the first flow path member 210, or are formed only in the second flow path member 220. The cross groove portions 222a and 222b may be formed. For example, by forming the cross groove portions 222a and 222b only in the first flow path member 210 on the Z2 side, interference with the COF substrate 98 is prevented similarly to the first cross flow paths 251a and 251b described above, The degree of freedom in arranging the two flow paths 242 can be improved.

  The second intersecting flow path 252a and the second intersecting flow path 252b are disposed on both outer sides in the X direction of the opening 201 (second opening 225) through which the COF substrate 98 is inserted.

  Hereinafter, when describing as the 1st crossing channel 251, it shall point to both the 1st crossing channel 251a and the 1st crossing channel 251b. When describing as the 2nd crossing channel 252, it shall point to both the 2nd crossing channel 252a and the 2nd crossing channel 252b. Moreover, when it describes as the crossing flow path 250, all of the four crossing flow paths mentioned above shall be pointed out.

  Further, in the present embodiment, the first flow path 241 is configured to branch from one introduction flow path 280 to a plurality of connection parts 290. That is, from the first intersecting channel 251, the plurality of first branch channels 261 are the same plane as the first intersecting channel 251 (the interface where the second channel member 220 and the third channel member 230 are joined) It branches in.

  In the present embodiment, in the plane parallel to the liquid ejection surface 20 a (the interface between the second flow passage member 220 and the third flow passage member 230), the first intersecting flow passage 251 to six first branch flow passages 261 Are branched. The six first branch channels 261 branched from the first intersecting channel 251a are respectively referred to as a first branch channel 261a1 to a first branch channel 261a6. Hereinafter, when the first branch flow channel 261a is described, all of the six branch flow channels connected to the first branch flow channel 261a are referred to.

  Similarly, the six first branch channels 261 branched from the first intersecting channel 251b are respectively referred to as a first branch channel 261b1 to a first branch channel 261b6. Hereinafter, when the first branch flow channel 261b is described, all of the six branch flow channels connected to the first branch flow channel 261b are referred to. Furthermore, when describing as the first branch flow channel 261, all of the twelve branch flow channels connected to the first branch flow channel 261a and the first branch flow channel 261b shall be pointed out.

  In the drawing, among the six first branch channels 261a1 to the first branch channels 261a6 arranged in the Y direction, the reference numerals of the first branch channels 261a2 to the first branch channels 261a5 are omitted. , Y1 side from Y2 side in order. The same applies to the first branch flow channel 261 b 1 to the first branch flow channel 261 b 6.

  Specifically, on the surface of the third flow path member 230 on the Z2 side, a plurality of branch grooves 232a that communicate with the intersection groove 231a and extend toward the opening 201 are provided. On the surface on the Z1 side of the second flow path member 220, a plurality of branch grooves 227a are provided, which communicate with the intersecting groove 226a and extend toward the opening 201. The first branch flow channel 261a is formed by sealing the branch groove portions 232a opposite to each other in the branch groove portions 227a.

  On the surface of the third flow path member 230 on the Z2 side, a plurality of branch grooves 232b communicating with the intersection groove 231b and extended toward the opening 201 are provided. On the surface on the Z1 side of the second flow path member 220, a plurality of branch grooves 227b are provided, which communicate with the intersection groove 226b and extend toward the opening 201. The first branch flow channel 261 b is formed by sealing the branch groove portions 232 b opposite to each other in the branch groove portions 227 b.

  The first branch flow channel 261a, 261b is formed by forming the branch groove portions 227a, 227b, 232a, 232b in the second flow channel member 220 and the third flow channel member 230, respectively. The cross-sectional area of each 261 b is expanded to reduce the pressure loss in the first branch channels 261 a, 261 b. The first branch flow channels 261a and 261b may be formed by branch groove portions 227a and 227b formed only in the second flow channel member 220, or formed only in the third flow channel member 230. You may form by the cross groove parts 232a and 232b. For example, as described later, in the area Q where the width in the Ya direction spreads from Z1 to Z2 by inclining in the Ya direction, the branch groove portions 227a and 227b are formed only in the second flow path member 220 located on the Z2 side. By forming the first channel 241, it is possible to improve the degree of freedom in arranging the first channel 241 while preventing interference with the COF substrate 98. Further, in the region P in which the width in the Ya direction spreads from the Z2 side toward the Z1 side, by forming the branch grooves 232a and 232b only in the third flow path member 230 on the Z1 side, interference with the COF substrate 98 is achieved. The degree of freedom in arranging the first flow path 241 can be improved while preventing it.

  In addition, the second flow path 242 is configured to branch from one introduction flow path 280 to a plurality of connection parts 290. Although the details will be described later, the plurality of second branch channels 262 are in the same plane as the second intersection channel 252 from the second intersection channel 252 (the first channel member 210 and the second channel member 220 are joined Bifurcation at the

  In the present embodiment, in the plane parallel to the liquid ejection surface 20 a (the interface between the first flow path member 210 and the second flow path member 220), the second intersecting flow paths 252 to six second branch flow paths 262 Are branched. The six second branch channels 262 branched from the second intersecting channel 252a are respectively referred to as a second branch channel 262a1 to a second branch channel 262a6.

  Similarly, the six second branch channels 262 branched from the second intersecting channel 252b are respectively referred to as a second branch channel 262b1 to a second branch channel 262b6.

  Hereinafter, when the second branch flow channel 262a is described, all of the six branch flow channels connected to the second branch flow channel 262a are referred to. When describing as the 2nd branch channel 262b, all of six branch channels connected to the 2nd branch channel 262b shall be pointed out. Moreover, when it describes as the 2nd branch flow path 262, all the 12 branch flow paths connected to the 2nd branch flow path 262a and the 2nd branch flow path 262b shall be pointed out. Furthermore, when describing as the branch flow path 260, all of the above-mentioned 24 branch flow paths shall be pointed out.

  In the figure, among the six second branch channels 262a1 to the second branch channels 262a6 aligned in the Y direction, the reference numerals of the second branch channels 262a2 to the second branch channels 262a5 are not shown. , Y1 side from Y2 side in order. The same applies to the second branch flow channel 262b1 to the second branch flow channel 262b6.

  Specifically, on the surface of the second flow path member 220 on the Z2 side, a plurality of branch grooves 223a that communicate with the intersection groove 222a and extend toward the opening 201 are provided. The surface on the Z1 side of the first flow path member 210 is provided with a plurality of branch grooves 214a that communicate with the intersection groove 213a and extend toward the opposite side to the opening 201 side. The second branch flow channel 262a is formed by sealing the branch groove portions 214a opposite to each other in the branch groove portions 223a.

  On the surface of the second flow path member 220 on the Z2 side, a plurality of branch grooves 223b are provided, which communicate with the intersecting groove 222b and extend toward the opening 201. On the surface of the first flow path member 210 on the Z1 side, a plurality of branch grooves 214b are provided, which communicate with the intersection groove 213b and extend toward the opening 201. The second branch flow channel 262b is formed by sealing the branch groove portions 214b opposite to each other in the branch groove portions 223b.

  With regard to any second branch flow channel 262a, 262b, by forming the branch groove portions 214a, 214b, 223a, 223b in the first flow channel member 210 and the second flow channel member 220, respectively, the second branch flow channel 262a, The cross-sectional area of each of 262 b is expanded to reduce the pressure loss in the second branch flow path 262 a, 262 b. The second branch flow paths 262a and 262b may be formed by branch groove portions 214a and 214b formed only in the first flow path member 210, or formed only in the second flow path member 220. It may be formed by branch groove parts 223a and 223b. For example, as described later, in a region Q in which the width in the Ya direction widens from Z1 to Z2 by inclining in the Ya direction, the branch groove portions 214a and 214b are formed only in the first flow path member 210 located on the Z2 side. By forming the second flow path 242, the degree of freedom in arranging the second flow path 242 can be improved while preventing interference with the COF substrate 98. Further, in the region P where the width in the Ya direction spreads from the Z2 side toward the Z1 side, by forming the branch groove portions 223a and 223b only in the second flow path member 220 located on the Z1 side, interference with the COF substrate 98 is achieved. The degree of freedom in arranging the second flow path 242 can be improved while preventing.

  The first vertical channel 271 is connected to the first branch channel 261 at the end opposite to the first intersecting channel 251. Specifically, a first vertical channel 271 is formed as a through hole which penetrates the third channel member 230 in the Z direction.

  In the present embodiment, one for each of the first branch flow channels 261a1 to 261a6 and the first branch flow channels 261b1 to 261b6, that is, twelve first vertical flow channels 271a1 to 271a6 as a whole, the first vertical flow The paths 271b1 to 271b6 are connected.

  Similarly, a second vertical flow path 272 is connected to the second branch flow path 262 at the end opposite to the second cross flow path 252. Specifically, the second flow passage member 220 is provided with a through hole 224 penetrating in the Z direction, and the third flow passage member 230 is provided with a through hole 233 penetrating in the Z direction. The through holes 224 and the through holes 233 communicate with each other to form a second vertical flow path 272.

  In the present embodiment, one for each of the second branch flow paths 262a1 to 262a6 and the second branch flow paths 262b1 to 262b6, that is, twelve second vertical flow paths 272a1 to 272a6 as a whole, the second vertical flow The paths 272b1 to 272b6 are connected.

  Hereinafter, when the first vertical flow channel 271a is described, the first vertical flow channels 271a1 to 271a6 are indicated, and when the first vertical flow channel 271b is described, the first vertical flow channels 271b1 to 271b6 are indicated. When describing as the first vertical flow channel 271, it refers to all of the first vertical flow channel 271a and the first vertical flow channel 271b.

  Similarly, the term “second vertical channel 272 a” refers to the second vertical channels 272 a 1 to 272 a 6, and the term “second vertical channel 272 b” refers to the second vertical channels 272 b 1 to 272 b 6. When describing as the second vertical flow channel 272, it refers to all of the second vertical flow channel 272a and the second vertical flow channel 272b.

  Furthermore, when describing as the vertical flow channel 270, all of the 24 vertical flow channels described above shall be pointed out.

  In the drawing, among the six first vertical channels 271a1 to the first vertical channels 271a6 arranged in the Y direction, the reference numerals of the first vertical channels 271a2 to the first vertical channels 271a5 are omitted. , Y1 side from Y2 side in order. The same applies to the first vertical channel 271b1 to the first vertical channel 271b6, the second vertical channel 272a1 to the second vertical channel 272b6, and the second vertical channel 272b1 to the second vertical channel 272b6.

  The vertical flow passage 270 described above has a connection portion 290 which is an opening on the Z1 side of the third flow passage member 230. Although details will be described later, the connection portion 290 is in communication with the introduction path 44 provided in the head main body 110.

  In the present embodiment, the first vertical flow channels 271a1 to 271a6 and the first vertical flow channels 271b1 to 271b6 are openings on the Z1 side of the third flow channel member 230, the first connection portions 291a1 to 291a6, and the first connection portions 291b1. It has ~ 291b6 respectively. Similarly, the second vertical flow paths 272a1 to 272a6 and the second vertical flow paths 272b1 to 272b6 are the openings on the Z1 side of the third flow path member 230, the second connection portions 292a1 to 292a6, and the second connection portions 292b1 to 292b6. Respectively.

  The first connection portion 291 a 1, the first connection portion 291 b 1, the second connection portion 292 a 1, and the second connection portion 292 b 1 are connected to one of the six head main bodies 110. In addition, the same applies to the first connection portions 291a2 to 291a6, the first connection portions 291b2 to 291b6, the second connection portions 292a2 to 292a6, and the second connection portions 292b2 to 292b6. That is, the first flow path 241a, the first flow path 241b, the second flow path 242a, and the second flow path 242b are connected to one head main body 110.

  Hereinafter, the first connection portion 291a refers to the first connection portion 291a1 to 291a6, and the first connection portion 291b refers to the first connection portion 291b1 to 291b6 and the first connection portion When described as 291, all the 1st connection parts 291a and the 1st connection parts 291b shall be pointed out.

  Similarly, the term “second connection part 292 a” refers to the second connection parts 292 a 1 to 292 a 6, and the term “second connection part 292 b” refers to the second connection parts 292 b 1 to 292 b 6. When describing as the part 292, it shall refer to all the 2nd connection part 292a and the 2nd connection part 292b.

  Furthermore, when it describes as the connection part 290, all of the 24 connection parts mentioned above shall be pointed out.

  As described above, the flow path member 200 according to the present embodiment includes the four flow paths 240, that is, the first flow path 241a and the first flow path 241b, and the second flow path 242a and the second flow path 242b. ing. Each flow path 240 is configured as a single flow path from the introduction flow path 280 serving as the inlet of ink to the cross flow path 250, and branches from the cross flow path 250 to the branch flow path 260, and the vertical flow path 270 And the connection portion 290 is connected to the plurality of head main bodies 110.

  In this embodiment, four color inks of black Bk, magenta M, cyan C, and yellow Y are used. From a liquid storage means (not shown), cyan C is supplied to the first flow path 241a, yellow Y to the first flow path 241b, black Bk to the second flow path 242a, and magenta M to the second flow path 242b. Then, the ink of each color flows through the first flow path 241 a, the first flow path 241 b, the second flow path 242 a and the second flow path 242 b, and is supplied to each head main body 110.

  Further, the flow path member 200 is provided with an opening 201 through which the COF substrate 98 provided in the head main body 110 is inserted. In the present embodiment, the first flow path member 210 is formed with a first opening 215 which is inclined with respect to the Z direction and penetrates. The second flow passage member 220 is formed with a second opening 225 which is inclined with respect to the Z direction and penetrates. The third flow passage member 230 is formed with a third opening 235 which is inclined with respect to the Z direction and penetrates.

  The first opening 215, the second opening 225, and the third opening 235 communicate with each other to constitute one opening 201. The opening 201 has an opening shape elongated in the Xa direction, and six openings 201 are arranged in parallel in the Y direction.

  Here, as shown in FIG. 16, the COF substrate 98 according to the present embodiment has a lower end 98c which is one end closer to the head main body 110 in the Z direction, and the other end remote from the head main body 110 in the Z direction. And the upper end 98d. The width in the Xa direction of the upper end 98 d is smaller than the width in the Xa direction of the lower end 98 c. That is, the width of the flexible wiring board 98 in the surface direction is formed such that the other end is narrower than the one end.

  In the present embodiment, the portion of the COF substrate 98 inserted into the first opening 215 and the third opening 235 has a rectangular shape with a constant width in the Xa direction, and the portion inserted into the second opening 225 is Z1. It is formed in the trapezoidal shape formed so that the width | variety of Xa direction may become narrow toward the Z2 side from the side.

  On the other hand, the opening 201 of the flow path member 200 is from the first opening 236 (that is, the opening on the Z1 side of the third opening 235) closer to the head main body 110 in the Z direction perpendicular to the liquid ejection surface 20a A far second opening 216 (ie, an opening on the Z2 side of the first opening 215) is provided.

  The second opening 216 is formed narrower in the Xa direction than the first opening 236. That is, as the opening 201, the width in the Xa direction is narrowed from Z1 to Z2 in the Z direction. Specifically, the opening 201 is shaped to accommodate the COF substrate 98, and the width of the opening 201 in the Xa direction is slightly larger than the width of the COF substrate 98 in the Xa direction.

  The inclination of the COF substrate 98 inserted into the opening 201 of the flow path member 200 will be described with reference to FIG. FIG. 17A is a cross-sectional view taken along the line E-E 'of FIGS. 10 to 13 and is a schematic side view of one head body of the recording heads according to the present embodiment from the Xa2 side to the Xa2 side in the Xa direction. It is. FIG. 17B is a schematic side view of the head main body according to the comparative example as viewed from the Xa2 side in the Xa direction from the Xa2 side.

  As shown in FIG. 17A, in the flow path member 200, the first opening 215, the second opening 225, and the third opening 235 communicate with each other to form one opening 201. Here, the surface of the COF substrate 98 passing through the first opening 236 on the head body 110 side and the second opening 216 on the opposite side of the head body 110 in the opening portion 201 of the flow path member 200 is a plane B (however, 17A is shown as a straight line), intersects with the plane B at the first opening 236, is parallel to the Xa direction, and is a plane perpendicular to the liquid ejection surface 20a as the plane A (however, FIG. 17A). The plane B, which is the surface of the COF substrate 98, intersects with the plane A perpendicular to the liquid injection surface 20a.

  Specifically, the second opening 216 and the first opening 236 are provided at different positions in the Ya direction. In the present embodiment, the second openings 216 of the six openings 201 are arranged to be shifted by a predetermined distance on the Ya2 side in the Ya direction with respect to the corresponding first openings 236. That is, the opening 201 is inclined so that the second opening 216 side of the plane B is away from the plane A from the Ya1 side to the Ya2 side in the Ya direction.

  The COF substrate 98 is extended toward the flow path member 200 from the connection port 43 (see FIG. 8) provided on the head main body 110 side, and the COF substrate 98 is formed between the head main body 110 and the relay substrate 140 (see FIG. 2). In the flow path member 200 located between them, it is inclined to the side of one surface of the COF substrate 98. Here, among the two surfaces of the COF substrate 98, this one surface is a first surface 98a, and the other surface is a second surface 98b. In this case, the first surface 98a of the COF substrate 98 is a side not facing the plane A, that is, a surface on the Ya2 side in the Ya direction. The second surface 98 b of the COF substrate 98 is a side facing the plane A, that is, a surface on the Ya1 side in the Ya direction.

  The phrase “the COF substrate 98 is inclined toward the first surface 98 a in the flow passage member 200 between the head body 110 and the relay substrate 140” means that the flow passage member 200 from the head body 110 in the COF substrate 98. The portion up to the second opening 216 corresponding to the outlet of the opening 201 is inclined to the first surface 98 a side. Therefore, the part protruding from the second opening 216 and connected to the surface of the relay substrate 140 may be inclined in any direction.

  The width of the opening 201 in the Ya direction is such that the distance from the portion closest to the opening 201 in the inclined COF substrate 98 is substantially constant between the Ya1 side and the Ya2 side. Specifically, for each of the first flow path member 210, the second flow path member 220, and the third flow path member 230, the first opening 215, the second flow path member 220, and the third The respective widths in the Ya direction of the second opening 225 and the third opening 235 are determined. In order to facilitate the processing of the flow path member 200, the first opening 215, the second opening 225, and the third opening 235 are openings that are penetrated along the Z direction, as viewed from the Xa direction. The shape of the opening 201 is a stepped shape as shown in FIG. Of course, along the slope of the COF substrate 98, the opening 201 may also be sloped. The COF substrate 98 inserted into the opening 201 is inclined to the first surface 98 a side (that is, the Ya2 side) with respect to the plane A by being inserted into the opening 201.

  As shown in FIG. 8, an introduction path 44 is formed around the connection port 43 on the surface on the Z2 side of the head main body 110, and provided on the side of the connection port 43 of the COF substrate 98 on the Ya1 side. The introduction path 44 and the introduction path 44 provided on the Ya2 side are arranged such that the intervals in the Ya direction from the connection port 43 are substantially the same. On the other hand, the COF substrate 98 is disposed so that the connection portion is located approximately at the center of the connection port 43 in order to facilitate electrical connection with the lead electrode 90 from both sides in the Ya direction of the COF substrate 98. There is. In other words, the COF substrate 98 is disposed close to one side surface of the connection port 43 in the Ya direction (Ya1 side in FIG. 8), and as a result, the COF substrate 98 is in any of the introduction paths 44 in the Ya direction. It is arranged closely. However, in the flow path member 200, the distance between the flow path member 200 and the COF substrate 98 is prevented by making the distance between the COF substrate 98 in the Ya direction substantially constant on either the Ya1 side or the Ya2 side. , In the direction of Ya.

  The first flow path 241 provided in the flow path member 200 is connected to the corresponding head main body 110 via the first branch flow path 261 on the side of the first surface 98 a of the COF substrate 98 inclined as described above, The second flow path 242 is connected to the corresponding head main body 110 via the second branch flow path 262 on the second surface 98 b side.

  This will be described in detail with reference to FIG. 17 and FIG. FIG. 18 is a schematic plan view of one head main body of the recording head according to the present embodiment as viewed from the Z2 side in the Z direction from the Z2 side.

  As shown in FIG. 18, four introduction paths 44 are formed around the connection port 43 on the surface on the Z2 side of the head main body 110 (see FIG. 7). Specifically, the two introduction paths 44 a and 44 b are opened on the Ya1 side in the Ya direction with respect to the connection port 43, and the position in the Xa direction is a position included in the connection port 43. The introduction path 44a is disposed closer to the Xa1 side in the Xa direction than the introduction path 44b. Further, the remaining two introduction paths 44 c and 44 d are opened on the Ya 2 side in the Ya direction with respect to the connection port 43, and the position in the Xa direction is a position included in the connection port 43. The introduction path 44c is disposed closer to the Xa1 side in the Xa direction than the introduction path 44d. The connection port 43 is formed in substantially the same shape as the first opening 236, and the connection port 43 and the first opening 236 are in communication.

  The introduction path 44a is a second flow path 242a, that is, a second introduction flow path 282a (see FIG. 14), a second intersecting flow path 252a, a second branch flow path 262a, a second vertical flow path 272a, and a second connection portion 292a. It is connected to the.

  The introduction path 44b is a second flow path 242b, that is, a second introduction flow path 282b (see FIG. 15), a second intersecting flow path 252b, a second branch flow path 262b, a second vertical flow path 272b, and a second connection portion 292b. It is connected to the.

  The introduction path 44c is a first flow path 241a, that is, a first introduction flow path 281a (see FIG. 14), a first intersecting flow path 251a, a first branch flow path 261a, a first vertical flow path 271a, and a first connection portion 291a. It is connected to the.

  The introduction path 44d is a first flow path 241b, that is, a first introduction flow path 281b (see FIG. 15), a first intersecting flow path 251b, a first branch flow path 261b, a first vertical flow path 271b, and a first connection portion 291b. It is connected to the.

  The relationship between these introduction paths 44 a to 44 d and the first flow path 241 and the second flow path 242 is the same for the six head bodies 110.

  As described above, the first flow path 241 is connected to the head main body 110 on the side of the first surface 98 a of the COF substrate 98. Also, the second flow path 242 is connected to the head main body 110 on the second surface 98 b side of the COF substrate 98.

  Here, as shown in FIG. 17A, the COF substrate 98 is inclined toward the first surface 98a, and the opening 201 is also inclined toward the first surface 98a (Y2). As described above, when the openings 201 are inclined toward the first surface 98 a, the regions can be formed in the area where the flow path 240 of the flow path member 200 can be formed.

  “In the area where the flow path 240 of the flow path member 200 can be formed, density is provided” means that the area T of the flow path member 200 facing the head main body 110 is in the Ya direction in which the COF substrate 98 is inclined. It is divided into a region P on the first surface 98a side of the COF substrate 98 and a region Q on the second surface 98b side across the opening 201 through which the COF substrate 98 is inserted, and in the same plane in the Z direction, the region Q The width in the Ya direction of the region P is wider than the width in the Ya direction of the region P.

  In the present embodiment, the first surface in the Ya direction of the region T of the first flow path member 210, the second flow path member 220, and the third flow path member 230 that constitute the flow path member 200 faces the head main body 110. The region 98 a is the region P, and the second surface 98 b is the region Q. In the figure, hatches indicating these areas P and Q are given.

  In the present embodiment, as shown in FIG. 17A, in the surface on the Z1 side of the first flow path member 210, which is one of the above-described identical surfaces, the region Q is in the Ya direction due to the inclination of the COF substrate 98. The width of the region P in the direction of Ya is narrowed accordingly. Similarly, in the surface on the Z2 side of the second flow path member 220 which is one of the above-described identical surfaces, the region Q is expanded by the width U2 in the Ya direction, and the region P has a width in the Ya direction It is getting narrower.

  The width of the region Q in the Ya direction is wider as it goes from the Z1 side to the Z2 side in the Z direction. In the present embodiment, the first flow path member 210 has a larger difference in density between the area P and the area Q than the second flow path member 220. Similarly, the second flow path member 220 has a larger difference in density between the area P and the area Q than the third flow path member 230. That is, in the flow path member 200, the difference in density of the area P and the area Q increases as going from the head main body 110 to the relay substrate 140.

  Then, in such a sparse region Q, the second branch flow channel 262 provided in a plane parallel to the liquid ejection surface 20a is located. “In the sparse area Q, the second flow path 242 has a portion provided along the liquid injection surface 20a” means that at least a part of the flow path constituting the second flow path 242 is the area Q described above. It means that it is provided in a plane parallel to the liquid ejection surface 20 a and then connected to the introduction path 44 of the head main body 110.

  In the present embodiment, the second branch flow passage 262 a of the second flow passage 242 a is provided in the region Q. In addition, the second branch flow passage 262 b of the second flow passage 242 b is provided in the region Q.

  In the recording head 100 according to the present embodiment, the opening portion 201 of the flow path member 200 can also be moved to the first surface 98 a side by tilting the COF substrate 98 to the first surface 98 a side. Density can be provided in an area where the flow path 240 of the passage member 200 can be formed. As a result, the second branch flow channel 262 constituting the second flow channel 242 can be disposed in the area Q wider than the area P. That is, since the second branch flow channel 262 can be disposed in the wider area Q, it is easy to configure the optimum second flow channel 242 according to the arrangement of the head main body 110 and the like. In other words, the wider the area Q, the higher the freedom of arrangement of the second channel 242. The degree of freedom in the arrangement of the second flow path 242 mentioned here is a concept that is proportional to the width of the area Q in the Ya direction, and the higher the degree of freedom, the easier it is to form the second flow path 242 in the area Q. means. The second flow passage 242 of the present embodiment corresponds to a flow passage having a portion provided along the liquid ejection surface on the second surface side of the present invention, and the second branch flow passage 262 of the present embodiment. Corresponds to a flow path provided along the liquid ejection surface.

  Further, according to the recording head 100 according to the present embodiment, by inclining the COF substrate 98, it is possible to form a sparse region Q whose width is widened in the Ya direction. Thus, since the width in the Ya direction is expanded, it is possible to form the second branch flow path 262 which constitutes a part of the second flow path 242 without interfering with the COF substrate 98 in the Ya direction.

  Thereby, in the Ya direction of the second flow path member 220, the distance between the second branch flow path 262 and the plane A can be narrowed as compared to a comparative example described later, so the second flow path member 220, ie, The flow path member 200 can be miniaturized in the Ya direction, and the width of the recording head 100 in the Ya direction can be miniaturized.

  Furthermore, as described above, in the present embodiment, the COF substrate 98 is disposed close to the side surface on the Ya1 side of the connection port 43, and as a result, the COF substrate 98 is provided in the introduction path 44 on the Ya1 side of the connection port 43. It is arranged closely. Then, the branch flow path 260 connected to the introduction path 44 via the vertical flow path 270 has a certain distance in the direction of the COF substrate 98 and the arrangement of the branch flow path 260 on the Ya1 side of the COF substrate 98. The degree of freedom of However, even in such a case, the COF substrate 98 is inclined to the opposite side to the Ya2 side, thereby enhancing the freedom of arrangement of the branch flow path 260 on the Ya1 side of the COF substrate 98, and the flow path member Miniaturization of 200 in the direction of Ya can be achieved.

  Incidentally, in the recording head in which the COF substrate 98 is not inclined, the above-described miniaturization can not be achieved. This will be described with reference to FIGS. 17 (a) and 17 (b).

  The distance in the Ya direction between the second opening 225 and the second branch flow channel 262a shown in FIG. On the other hand, FIG. 17B shows a schematic side view of the recording head according to the comparative example. The recording head 100 ′ according to the comparative example has the same configuration as the recording head 100 except for the inclination of the COF substrate 98, the arrangement of the opening 201 along the COF substrate 98, and the size of the region T facing the head body 110. Suppose that there is.

  In the recording head 100 ′, the same distance as that of the recording head 100 in order to form the second branch flow path 262a ′ provided in a plane parallel to the liquid ejection surface 20a without interfering with the COF substrate 98 in the Ya direction. If V is maintained, the second branch flow path 262 a ′ must be provided on the Ya1 side in the Ya direction by an amount corresponding to the expanded width U in the recording head 100. Therefore, in the recording head 100 'according to the comparative example, the distance between the second branch flow path 262a' and the plane A becomes wide in the direction of the flow path member 200 in the direction of Ya, and the size of the flow path member 200 in the direction of Ya is reduced. Can not be In other words, as shown in FIG. 17A, since the COF substrate 98 is inclined toward the first surface 98a, the second vertical flow path 272a is increased by the width U1 or the width U2 while maintaining the interval V. It can be brought close to the COF substrate 98 side. That is, downsizing of the flow path member 200 in the Ya direction can be achieved.

  Further, in the recording head 100 according to the present embodiment, the first cross flow channel 251 a and the second cross flow channel 252 a of the first flow channel 241 and the second flow channel 242 can be used. The cross flow paths 252b are arranged in the Z direction so as to be different in position in the Z direction orthogonal to the liquid ejection surface 20a. Thereby, the shape in the surface direction of the liquid ejection surface 20 a of the recording head 100 can be miniaturized as compared with the case where all the plurality of intersecting flow paths are formed in the same plane.

  Furthermore, in the recording head 100 according to the present embodiment, the second branch flow path 262 and the head main body 110 are connected by the second vertical flow path 272 in the direction perpendicular to the liquid ejection surface 20a. Therefore, in plan view seen from the Z direction perpendicular to the liquid ejection surface 20a, the range of the second vertical flow channel 272 is the second branched channel 262 and the head by the flow channel inclined in the direction perpendicular to the liquid ejection surface 20a. When connecting with the main body 110, it is smaller than the range occupied by the inclined flow path. That is, as in the present embodiment, by connecting the second intersecting flow path 252 and the head main body 110 with the second vertical flow path 272, the size of the flow path member 200 in a plan view can be miniaturized. It becomes possible. Similarly, since the first branch flow passage 261 and the head main body 110 are connected by the first vertical flow passage 271 along the direction perpendicular to the liquid ejection surface 20a, also in this case, in the plan view of the flow passage member 200. It becomes possible to miniaturize the size.

  The width of the vertical flow channel 270 in the Ya direction may be smaller than the width of the branch flow channel 260 in the Ya direction. In that case, the degree of freedom in the arrangement of the vertical flow path 270 and the branch flow path 260 can be further enhanced while maintaining the distance V from the opening 201 more than in the case other than that. In addition, the cross sectional area of the vertical flow channel 270 may be smaller than the cross sectional area of the branch flow channel 260. In that case, the flow velocity in the vertical flow channel 270 can be increased, and the bubbles in the vertical flow channel 270 can be efficiently discharged.

  Here, it is temporarily assumed that the second flow path 242 is formed in the region P. In this case, as described above, as the flow path member 200 is farther from the head main body 110 in the Z direction, the width in the Ya direction of the region Q is wider, and the width in the Ya direction of the region P is narrower. In particular, assuming that the COF substrate 98 is disposed close to the side surface of the connection port 43 on the Ya2 side, the width of the region P in the Ya direction is equal to the COF substrate 98 and the Ya direction. It becomes narrower. Therefore, when the side where the COF substrate 98 approaches the side surface of the connection port 43 in the Ya direction (for example, the Ya2 side) and the side where the COF substrate 98 is inclined in the Ya direction (for example, the Ya2 side) coincide with each other. The degree of freedom in arranging the second flow path 242 in the region P is low, and the arrangement of the second flow path 242 becomes very difficult. However, in the present embodiment, by forming the second branch flow channel 262 in the region Q, the degree of freedom of the arrangement of the second branch flow channel 262 is enhanced, and the miniaturization of the flow channel member 200 in the Ya direction is achieved. . Further, the side (for example, Ya1 side) where the COF substrate 98 approaches the side surface of the connection port 43 in the Ya direction and the side (for example, Ya2 side) where the COF substrate 98 is inclined in the Ya direction do not coincide with each other. The degree of freedom of the arrangement of the branch flow path 260 on the side where the COF substrate 98 approaches the side surface of the connection port 43 in the Ya direction is enhanced, and the miniaturization of the flow path member 200 in the Ya direction is achieved.

  On the other hand, it is assumed that the first channel 241 is formed in the region Q. In this case, the width of the flow path member 200 in the Ya direction of the region Q is wider as the flow path member 200 is farther from the head main body 110 in the Z direction, but the first flow path 241 is formed closer to the head main body 110 in the Z direction. Therefore, the region Q widened in the Ya direction can not be fully utilized. In particular, as in the present embodiment, in order to miniaturize the shape in the surface direction of the liquid injection surface 20a, the first intersecting flow path 251a and the second intersecting flow path 252a, and the first intersecting flow path 251b and the second intersection Assuming that the flow paths 252 b are arranged overlapping in the Z direction with different positions in the Z direction, the first branch flow path 261 and the second branch flow path 262 are both formed in the region Q, The degree of freedom is not high as compared with the case where the bifurcated flow passage 262 is formed in the region Q and the first branched flow passage 261 is formed in the region P. However, in the present embodiment, by forming the first branch flow channel 261 in the region P, the degree of freedom of the arrangement of the first branch flow channel 261 is increased, and the miniaturization of the flow channel member 200 in the Ya direction is achieved. . In addition, with respect to the first intersecting flow channel 251 and the second intersecting flow channel 252 disposed overlapping in the Z direction, the respective first branch channels 261 and the second branching channels 262 are not disposed overlapping in the Z direction. The degree of freedom of the arrangement of the first branch flow channel 261 and the second branch flow channel 262 is enhanced, and the miniaturization of the flow channel member 200 in the Ya direction is achieved.

  Further, as described above, in the COF substrate 98 according to the present embodiment, the width in the surface direction (Xa direction) of the upper end 98 d is narrower than the width in the surface direction of the lower end 98 c (see FIG. 16). Then, the opening 201 is formed in accordance with the COF substrate 98. Therefore, since the upper end 98 d of the COF substrate 98 is narrowed in the surface direction, the region W where the second flow channel 242 can be formed is formed on both sides of the second opening 216 in the surface direction of the flow passage member 200. It is done.

  In the present embodiment, the second intersecting flow path 252 and the second branch flow path 262 of the second flow path 242 are formed in the first flow path member 210 and the second flow path member 220. Therefore, in the first flow path member 210 and the second flow path member 220, the outer portion in the Xa direction of the openings 215, 225 is the region W (see FIG. 16). In the present embodiment, the first intersecting flow channel 251 and the second intersecting flow channel 252 are arranged to overlap in the Z direction (see FIGS. 14 and 15). In this case, when the first intersecting flow path 251 and the second intersecting flow path 252 are projected onto the liquid ejection surface 20 a in the Z direction, the respective images do not have to completely match each other. Alternatively, at least a part of the image of the second intersecting flow path 252 may be an image of the first intersecting flow path 251 in the X direction rather than the image of the first intersecting flow path 251. It may be inside the That is, the second intersecting flow path 252a of the second flow path 242a may be formed to pass through the region W. Not only the second intersecting flow path 252 a but also the second intersecting flow path 252 b and the second branch flow path 262 may be formed to pass through the region W. In these cases, for example, the second cross flow channel 252 and the second branch flow channel 262 are provided at positions that interfere with the lower end 98 c which is one end of the COF substrate 98 when viewed from the Z direction. Even in the Z direction, interference with the COF substrate 98 can be avoided at the position where the second intersecting flow channel 252 and the second branch flow channel 262 are provided.

  As described above, the COF substrate 98 is formed such that the upper end 98 d is narrower than the lower end 98 c and the opening 201 is provided in accordance with the COF substrate 98, whereby the second flow is performed outside the COF substrate 98 in the Xa direction. A region W may be provided to form the passage 242a. The same applies to the second flow path 242b. As a result, the degree of freedom in arranging the second flow path 242 in the flow path member 200 is further improved.

  Further, as shown in FIG. 17A, the COF substrate 98 provided with the drive circuit 97 is inserted through the opening 201 of the flow path member 200. In the present embodiment, the drive circuit 97 is provided on the second surface 98 b side of the COF substrate 98.

  Here, the drive circuit 97 may come in contact with the inner surface of the opening 201. Therefore, in order to avoid contact between the drive circuit 97 and the inner surface of the opening 201, the width of the opening 201 in the direction Ya is increased by the thickness of the drive circuit 97. By widening the width of the opening 201 in the Ya direction, the contact between the drive circuit 97 and the inner surface of the opening 201 can be effectively suppressed. At this time, the drive circuit 97 is disposed at a position to be accommodated in the second opening 225 of the second flow passage member 220 and the third opening 235 of the third flow passage member 230 in the Z direction. The first flow passage member 210 is not disposed at a position to be accommodated in the first opening 215. Accordingly, the width of the first opening 215 can be smaller than the width of the second opening 225 or the width of the third opening 235 in the Ya direction. That is, the area | region which forms the 2nd flow path 242 can be provided in the outer side of the COF board | substrate 98 in Ya direction. As a result, the degree of freedom in arranging the second flow path 242 in the flow path member 200 is further improved.

  If the drive circuit 97 is disposed at a position accommodated in the first opening 215 of the first flow path member 210, the width of the first opening 215 in the direction Ya can not be reduced. Therefore, the degree of freedom in arranging the second flow path 242 in the flow path member 200 can not be improved.

  On the other hand, in the recording head 100 according to the present embodiment, the drive circuit 97 is disposed at a position accommodated in the second opening 225 and the third opening 235 in the Z direction, and the first opening 215 in the Ya direction. By reducing the width, the degree of freedom in arranging the second flow paths 242 such as the second intersecting flow path 252 and the second branch flow path 262 in the flow path member 200 is improved.

  Here, the first flow path 241 connected to the head main body 110 in the dense region P will be described. In the dense region P, the first branch flow channel 261 provided in a plane parallel to the liquid ejection surface 20 a is located. “The first flow path 241 is connected to the head body 110 in the dense area P” means that at least a part of the flow path constituting the first flow path 241 is formed in the above-mentioned area P, and the head body 110 is formed. Is connected to the introduction path 44 of the Note that the first branch flow channel 261 of the present embodiment corresponds to a flow channel provided along the liquid ejection surface on the first surface side of the present invention.

  In the dense region P, since the width in the direction Ya is reduced, the region P having a sufficient width for arranging the first branch flow channel 261 may not be secured. However, in the present embodiment, the first flow passage 241 is disposed closer to the head main body 110 than the second flow passage 242 in the Z direction.

  Thus, even if the width of the region P in the Ya direction is narrowed due to the inclination of the COF substrate 98, the first flow path 241 can be connected to the head main body 110 without being affected thereby.

Other Embodiments
As mentioned above, although one Embodiment of this invention was described, the basic composition of this invention is not limited to what was mentioned above.

  For example, in each head main body 110 of the recording head 100 according to the first embodiment, the nozzle array a and the nozzle array b are along the Xa direction, and the nozzle array a and the nozzle array b are inclined with respect to the X direction which is the transport direction. In the case of making it cross, as described above, the X direction and the Xa direction may cross at an angle of more than 0 degree and less than 90 degrees, but the recording head 100 of a non-crossing mode is also included in the present invention. Alternatively, the recording head provided with the head main body 110 may be configured such that the Xa direction which is the direction of the nozzle array is perpendicular to the X direction which is the transport direction. In this case, the Xa direction coincides with the Y direction, and the Ya direction coincides with the X direction. Therefore, in the recording head 100 according to the first embodiment, the size is reduced in the Ya direction, but in the recording head 100 in which the Ya direction matches the X direction, the X direction corresponding to the Ya direction, ie, the recording sheet S It can be miniaturized in the transport direction.

  In addition, the recording head 100 according to the first embodiment includes the first flow path 241 and the second flow path 242, and the first cross flow path 251 and the second cross flow path 252 are provided at different positions in the Z direction. Although it had, it is not limited to such an aspect. For example, the flow path parallel to the liquid ejection surface 20a may be a recording head provided with a flow path member provided only on the same plane. For example, in the embodiment described above, it may be a recording head in which only the second flow path is provided in the flow path member including the first flow path member 210 and the second flow path member 220. As described above, if the recording head does not have any one of the first flow path 241 and the second flow path 242, the recording head 100 can be miniaturized in the Z direction.

  Further, in the recording head 100 according to the first embodiment, the introduction paths 44c, 44d, 44a, 44b are respectively provided for the first flow path 241a, the first flow path 241b, the second flow path 242a, and the second flow path 242b. Although connected, it is not limited to such an aspect. For example, the introduction paths 44c and 44b may be connected to the first flow path 241a and the first flow path 241b, and the introduction paths 44a and 44d may be connected to the second flow paths 242a and 242b, respectively. . In addition, in this case, as described above, the recording head may have only the second flow path but not the first flow path. An optimal flow path can be configured according to the arrangement of the head main body 110 and the like.

  Also, the first flow path member 210 and the second flow path member 220 are bonded to form the second flow path 242, and the second flow path member 220 and the third flow path member 230 are bonded to form the first flow path 241. However, the method of forming the first channel 241 and the second channel 242 is not limited to these. For example, two or more flow path members may be integrally molded without adhesion by the additive manufacturing method capable of three-dimensional molding. Alternatively, the individual channel members may be formed by three-dimensional molding, molding (injection molding etc.), cutting, or pressing.

  Moreover, although the flow path member 200 had the two 1st flow paths 241a and the 1st flow path 241b as the 1st flow path 241, it is not limited to two, It is one or three or more. May be The same applies to the second flow path 242.

  The first intersecting flow path 251a is branched into six first branch flow paths 261a. However, the present invention is not limited to this. The first intersecting flow path 251a may be connected to one head main body 110 without branching, and the number of branches is also six. The number is not limited to one, and may be branched into two or more. The same applies to the first intersecting flow channel 251b, the second intersecting flow channel 252a, and the second intersecting flow channel 252b. Further, the number of COF substrates 98 inclined to the first surface 98 a side is not limited to six, and only some of the COF substrates 98 may be inclined.

  In addition, although the first intersecting flow channel 251a is a flow channel that allows the ink to flow horizontally between the second flow channel member 220 and the third flow channel member 230, the present invention is not limited to such an aspect. That is, the flow path may be inclined relative to the Z plane. The same applies to the first intersecting flow channel 251b, the second intersecting flow channel 252a, and the second intersecting flow channel 252b.

  Furthermore, although the first vertical flow channel 271a is formed perpendicular to the liquid injection surface 20a, the present invention is not limited to such an embodiment. That is, it may be inclined with respect to the liquid injection surface 20a. The same applies to the first vertical flow channel 271b, the second vertical flow channel 272a, and the second vertical flow channel 272b.

  The second opening 216 of the opening 201 formed in the flow path member 200 does not have to be narrower in the Xa direction than the first opening 236. The width of the second opening 216 and the first opening 236 in the Xa direction may be substantially equal, and an opening may be used to accommodate the rectangular COF substrate 98. Also, conversely, the second opening 216 may be wider in the Xa direction than the first opening 236.

  Moreover, although the COF board | substrate 98 was provided as a flexible wiring board, a flexible printed circuit board (FPC) may be sufficient. In addition, even if the COF substrate 98 is not disposed close to the side surface of the connection port 43 on the Ya1 side, the COF substrate 98 and the lead electrode 90 may be electrically connected.

  Moreover, in Embodiment 1, although the holding member 120 and the flow-path member 200 were fixed by the adhesive agent etc., you may integrate. That is, the holding portion 121 and the foot portion 122 may be provided on the Z1 side of the flow path member 200. As a result, the size of the holding member 120 can be reduced in the Z direction by the amount not to be stacked in the Z direction. Further, by providing the holding portion 121 in the flow path member 200, it is sufficient that the flow path member 200 can accommodate the plurality of head main bodies 110, and the relay substrate 140 does not have to be accommodated. . Furthermore, the number of parts can be reduced by integrating a plurality of members. When the flow path member 200 is configured by the first flow path member 210, the second flow path member 220, and the third flow path member 230, the holding portion 121 and the foot portion on the Z1 side of the third flow path member 230 122 may be provided.

  In the first embodiment, the head body 110 is arranged in the Y direction, and the recording head 100 is configured of the plurality of head bodies 110. However, the recording head 100 may be configured of one head body 110. Further, the number of recording heads 100 included in the head unit 101 is not particularly limited, and two or more recording heads may be mounted, or one recording head 100 may be mounted on the ink jet recording apparatus 1 alone. It is also good.

  The above-described ink jet recording apparatus 1 is a so-called line recording apparatus in which printing is performed only by conveying the recording sheet S while the head unit 101 is fixed, but the invention is not particularly limited thereto. One or more recording heads 100 are mounted on the carriage, and the head unit 101 or the recording head 100 is moved in the main scanning direction intersecting the conveyance direction of the recording sheet S, and the recording sheet S is conveyed to print The present invention can also be applied to so-called serial type recording apparatuses that do.

  Furthermore, the present invention is intended for a wide range of liquid jet head units in general, and, for example, manufacture of recording heads such as various ink jet recording heads used in image recording apparatuses such as printers, and color filters such as liquid crystal displays Liquid jet head unit equipped with electrode material jet head used for forming electrodes of color material jet head used in the field, organic EL display, FED (field emission display) etc., bio organic matter jet head used for biochip manufacture, etc. It can apply.

  Further, the wiring board of the present invention is not limited to the case of being used for a liquid jet head, and can be applied to any electronic circuit or the like.

  Reference Signs List 1 inkjet recording apparatus (liquid ejecting apparatus) 43 connection port 44a, 44b, 44c, 44d introduction path 97 drive circuit 98 COF substrate 98a first surface 98b second surface 98c lower end 98d Upper end, 100 recording head, 101 head unit, 110 head main body, 140 relay substrate, 200 flow path member, 201 opening portion, 210 first flow path member, 216 second opening, 220 second flow path member, 230 second 3 channel member, 236 first opening, 240 channel, 241 first channel, 242 second channel, 251 first intersecting channel, 252 second intersecting channel, 261 first branch channel, 262 second Branch flow path, 271 first vertical flow path, 272 second vertical flow path, 281 first introduction flow path, 282 second introduction flow path, 91 first connecting portion, 292 a second connecting portion, 300 a piezoelectric actuator

According to an aspect of the present invention for solving the above problems, there are provided a nozzle row provided with a plurality of nozzle openings in a first direction inclined with respect to the recording sheet conveyance direction, a manifold communicating with the nozzle row, and the conveyance direction. And first and second intersecting channels respectively provided along a second direction orthogonal to the second direction, and the plurality of manifolds may be first, second, third and second in the second direction. The first intersecting flow passage and the second and fourth manifolds are branched from the first intersecting flow passage and provided at a first position in the transport direction. The second intersecting flow passage and the first and third manifolds communicate with each other in the vertical flow passage, and branch from the second intersecting flow passage to form the first position in the transport direction. Are provided in different second positions A liquid-jet head, characterized in that respectively communicating with the vertical flow path.
Another aspect of the present invention for solving the above problems is to supply a liquid to each of the head main bodies, a plurality of head main bodies having a liquid ejection surface on which the liquid is ejected, a flexible wiring board connected to each of the head main bodies, And the flow path member has a plurality of openings through which the flexible wiring board is inserted, and the flexible wiring board is the flow path member with respect to the head main body. It is extended to the side, and is inclined to the first surface side of the both sides of the flexible wiring board between the head main body and the flow path member, and the flow path is formed of the both sides of the flexible wiring board The second surface side has a portion provided along the liquid ejection surface, and a first channel and a second channel are connected to the head main body, and the first channel is The first surface side smell A first branch flow path provided along the liquid ejection surface, and the second flow path is a second branch flow path provided along the liquid ejection surface on the second surface side The liquid jet head according to claim 1, wherein the first branch flow path is closer to the head main body in a direction perpendicular to the liquid jet surface than the second branch flow path.
In this aspect, by inclining the flexible wiring substrate to the first surface side, the opening of the flow path member can also be moved to the first surface side, and the area of the flow path member can be formed densely Can be provided. Let P be a dense area on the first surface side than the opening of the flow passage member, and Q be a sparse area on the second surface side. As described above, since the flow path can be disposed in the wider area Q, it becomes easy to configure an optimal flow path according to the arrangement of the head main body and the like. In particular, when the flow path along the liquid ejection surface is provided, the flow path can be prevented from interfering with the flexible wiring board. Further, in order to prevent interference with the flexible wiring board, the width of the liquid jet head in the above-mentioned direction is made smaller as compared with the case where the flow path along the liquid injection surface is moved to the second surface side to widen the flow passage member. Can be
Furthermore, in the region Q, the second branch flow path can be formed in the flow path member with a higher degree of freedom as compared to the case where the first branch flow path close to the head main body is provided in the direction perpendicular to the liquid ejection surface. . In addition, since the plurality of flow paths can be arranged in an overlapping manner in the direction orthogonal to the liquid ejection surface, the shape of the liquid ejection head in the liquid ejection surface can be miniaturized.
Here, the first flow path connects the first branch flow path and the head main body on the first surface side and has a first vertical flow path extending in a direction perpendicular to the liquid ejection surface. Preferably, the second flow path has a second vertical flow path extending in a direction perpendicular to the liquid ejection surface, connecting the second branch flow path and the head main body on the second surface side. . According to this, the range of the first vertical flow passage and the second vertical flow passage occupied in the flow passage member in a plan view seen from the direction perpendicular to the liquid ejection surface is the first branch flow passage and the second branch flow passage. It is smaller than the range occupied by the flow path connecting each of the head main body obliquely. That is, by connecting the first branch channel and the second branch channel to the head main body respectively with the first vertical channel and the second vertical channel, the size of the channel member in the plan view can be reduced. It becomes possible.
Further, a plurality of head main bodies having a liquid ejection surface on which the liquid is ejected, a flexible wiring board connected to each of the head main bodies, and a flow path member provided with a flow path for supplying the liquid to each of the head main bodies And the flow path member has a plurality of openings through which the flexible wiring board is inserted, and the flexible wiring board is extended toward the flow path member with respect to the head body, and the head body And the flow path member is inclined to the first surface side of the both surfaces of the flexible wiring board, and the flow path is formed on the liquid ejection surface on the second surface side of the both surfaces of the flexible wiring board. A first flow path and a second flow path are connected to the head body, and the first flow path is formed on the first surface side of the flexible wiring board ,Previous A first branch flow channel provided in a direction parallel to the liquid ejection surface, and a first intersecting flow channel connected to the plurality of first branch flow channels, the second flow channel being the flexible On the second surface side of the wiring substrate, there is a second branch flow path provided in a direction parallel to the liquid ejection surface, and a second cross flow path connected to the plurality of second branch flow paths. It is preferable that the first intersecting flow path and the second intersecting flow path be on the opposite side to the flexible wiring board in the surface direction of the flexible wiring board. According to this, compared with the case where the branch flow channel is provided in the region P, the branch flow channel can be formed in the flow channel member with a higher degree of freedom. Further, since the intersecting flow paths are on the opposite side of the flexible wiring board in the surface direction of the flexible wiring board, the plural flow paths can be arranged without overlapping in the direction orthogonal to the liquid ejection surface, The shape of the liquid jet head in the direction orthogonal to the liquid jet surface can be miniaturized.
Further, the flexible wiring substrate has one end near the head main body in the direction perpendicular to the liquid ejection surface and the other end far from the head main body, and the other end is closer to the one end than the one end. It is preferable that the width in the surface direction of the flexible printed circuit is narrow, and the second flow channel is formed in the flow channel member so as to pass through the area outside the surface direction of the other end. According to this, it is possible to provide a region in which the second flow path is formed outside the flexible wiring substrate in the surface direction (direction parallel to the surface) of the flexible wiring substrate. As a result, the degree of freedom in arranging the second flow path in the flow path member is further improved.
Preferably, a drive circuit is provided on the second surface side of the flexible wiring board. According to this, by widening the width of the opening to the first surface side, the contact of the drive circuit with the inner surface of the opening can be more effectively suppressed, and the drive circuit can be protected. Then, even if the width of the opening is increased to the first surface side, the above-described dense area P side is further narrowed, and the sparse area Q side can be prevented from being narrowed.
Another aspect of the present invention is a liquid ejecting apparatus including the above-described liquid ejecting head.
In this aspect, there is provided the liquid ejecting apparatus including the flow path member capable of achieving downsizing and securing a larger area where the liquid flow path can be disposed.
Another aspect of the present invention for solving the above problems is to supply a liquid to each of the head main bodies, a plurality of head main bodies having a liquid ejection surface on which the liquid is ejected, a flexible wiring board connected to each head main body, And the flow path member has a plurality of openings through which the flexible wiring board is inserted, and the flexible wiring board is the flow path member with respect to the head main body. It is extended to the side, and is inclined to the first surface side of the both sides of the flexible wiring board between the head main body and the flow path member, and the flow path is formed of the both sides of the flexible wiring board A second aspect of the present invention is a liquid jet head including a portion provided along the liquid jet surface on the second surface side.
In this aspect, by inclining the flexible wiring substrate to the first surface side, the opening of the flow path member can also be moved to the first surface side, and the area of the flow path member can be formed densely Can be provided. Let P be a dense area on the first surface side than the opening of the flow passage member, and Q be a sparse area on the second surface side. As described above, since the flow path can be disposed in the wider area Q, it becomes easy to configure an optimal flow path according to the arrangement of the head main body and the like. In particular, when the flow path along the liquid ejection surface is provided, the flow path can be prevented from interfering with the flexible wiring board. Further, in order to prevent interference with the flexible wiring board, the width of the liquid jet head in the above-mentioned direction is made smaller as compared with the case where the flow path along the liquid injection surface is moved to the second surface to widen the flow passage member. Can be

Claims (6)

A plurality of head bodies having a liquid ejection surface on which the liquid is ejected;
A flexible wiring board connected to each of the head bodies;
A flow path member provided with a flow path for supplying liquid to each of the head main bodies;
The flow path member has a plurality of openings through which the flexible wiring board is inserted,
The flexible wiring board is extended toward the flow path member with respect to the head main body, and on the first surface side of the both sides of the flexible wiring board between the head main body and the flow path member Be tilted
The flow path has a portion provided along the liquid ejection surface on the second surface side of both surfaces of the flexible wiring substrate,
A first flow path and a second flow path are connected to the head body,
The first flow path has a first branch flow path provided along the liquid ejection surface on the first surface side,
The second flow path has a second branch flow path provided along the liquid ejection surface on the second surface side,
A liquid jet head characterized in that the first branch flow path is closer to the head main body in a direction orthogonal to the liquid jet surface than the second branch flow path. In the liquid jet head according to claim 1,
The first flow path connects the first branch flow path and the head body on the first surface side, and has a first vertical flow path extending in a direction perpendicular to the liquid ejection surface.
The second flow path has a second vertical flow path connecting the second branch flow path and the head main body and extending in a direction perpendicular to the liquid ejection surface on the second surface side. Liquid jet head. A plurality of head bodies having a liquid ejection surface on which the liquid is ejected;
A flexible wiring board connected to each of the head bodies;
A flow path member provided with a flow path for supplying liquid to each of the head main bodies;
The flow path member has a plurality of openings through which the flexible wiring board is inserted,
The flexible wiring board is extended toward the flow path member with respect to the head main body, and on the first surface side of the both sides of the flexible wiring board between the head main body and the flow path member Be tilted
The flow path has a portion provided along the liquid ejection surface on the second surface side of both surfaces of the flexible wiring substrate,
A first flow path and a second flow path are connected to the head body,
The first flow path is
A first branch flow path provided in a direction parallel to the liquid ejection surface on the first surface side of the flexible wiring board;
A plurality of first intersection channels connected to the first branch channels;
The second flow path is
A second branch flow path provided in a direction parallel to the liquid ejection surface on the second surface side of the flexible wiring board;
A second intersecting channel connected to the plurality of second branch channels;
A liquid jet head, wherein the first intersecting flow passage and the second intersecting flow passage are on the opposite side of the flexible wiring board in the surface direction of the flexible wiring board. The liquid jet head according to any one of claims 1 to 3.
The flexible wiring board has one end near the head main body in the direction perpendicular to the liquid ejection surface, and the other end far from the head main body.
The other end portion is formed such that the width in the surface direction of the flexible wiring board is narrower than that of the one end portion,
The liquid jet head according to claim 1, wherein the second flow path is formed in the flow path member so as to pass through an area outside the surface direction of the other end. The liquid jet head according to any one of claims 1 to 4.
A liquid jet head characterized in that a drive circuit is provided on the second surface side of the flexible wiring board.   A liquid jet apparatus comprising the liquid jet head according to any one of claims 1 to 5.

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