JP2018199347A - Liquid injection head - Google Patents

Abstract

To provide a liquid injection head achieving a reduction in size and comprising a flow passage member capable of securing a larger region where a liquid flow passage can be disposed, and a liquid injection device.SOLUTION: A liquid injection head comprises: a plurality of head bodies 110 having liquid injection surfaces 20a where ink is injected; a COF substrate 98 connected to each head body 110; and a flow passage member 200 provided with a flow passage 240 supplying the ink for each head body 110. The flow passage member 200 has a plurality of openings 201 through which the COF substrate 98 is inserted. The COF substrate 98 is provided so as to extend at a flow passage member 200 side with respect to the head bodies 110, and is inclined toward a first surface 98a side out of both surfaces of the COF substrate 98 among the head bodies 110 and the flow passage member 200. The flow passage 240 is connected to the head bodies 110 at a second surface 98b side out of both the surfaces of the COF substrate 98.SELECTED DRAWING: Figure 17

Description

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

  As the liquid ejecting head, for example, a pressure generating chamber communicating with a nozzle opening that discharges ink droplets is deformed by pressure generating means such as a piezoelectric element, and a head main body that discharges ink droplets from the nozzle opening, and the head main body are supplied to the head main body. 2. Description of the Related Art An ink jet recording head including a flow path member that forms a flow path of ink is known.

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

JP 2012-81644 A

  On the other hand, the liquid ejecting head is required to be downsized with high resolution, and the flow path member is also required to be reduced in size particularly in a horizontal plane parallel to the liquid ejecting surface.

  However, due to the downsizing of the flow path member, an area where the flow path can be formed in the flow path member excluding the opening through which the flexible wiring board is inserted becomes narrow. That is, it becomes difficult to provide the flow path member with a horizontal flow path through which ink flows in the horizontal plane. In addition, if the area where the flow path of the flow path member can be formed is narrow, the degree of freedom in routing the flow path is limited, and it is difficult to configure an optimal flow path according to the arrangement of the head body, for example. Become.

  Such a problem exists not only in an ink jet recording head that ejects ink, but also in a liquid ejecting head and a liquid ejecting apparatus that eject liquid other than ink.

  In view of such circumstances, the present invention provides a liquid ejecting head and a liquid ejecting apparatus that are reduced in size and include a flow path member that can secure a larger area where a liquid flow path can be disposed. With the goal.

An aspect of the present invention that solves the above problems includes a plurality of head bodies having a liquid ejecting 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 path, wherein the flow path member has a plurality of openings through which the flexible wiring board is inserted, and the flexible wiring board is located on the flow path member side with respect to the head body. It is extended and inclined between the head body and the flow path member toward the first surface side of both surfaces of the flexible wiring board, and the flow path is the second of both surfaces of the flexible wiring board. On the surface side, the head body has a portion provided along the liquid ejection surface, and the head body is connected to a first flow path and a second flow path, and the first flow path is connected to the first flow path. On the first side, The first flow path is provided along the liquid ejection surface, and the second flow path has a second flow path provided along the liquid ejection surface on the second surface side. In the liquid ejecting head, the first branch channel is closer to the head body in a direction perpendicular to the liquid ejecting surface than the second branch channel.
In such an aspect, by inclining the flexible wiring board to the first surface side, the opening of the flow path member can also be moved to the first surface side, so that the flow path of the flow path member can be densely formed in the region that can be formed. Can be provided. A dense region on the first surface side than the opening of the flow path member is P, and a sparse region on the second surface side is Q. Thus, since the flow path can be arranged in a wider area Q, it is easy to configure an optimal flow path according to the arrangement of the head body. In particular, when providing a flow path along the liquid ejection surface, it is possible to prevent the flow path from interfering with the flexible wiring board. Further, in order to prevent interference with the flexible wiring board, the width of the liquid ejecting head in the direction is reduced compared with the case where the flow path member along the liquid ejecting surface is moved to the second surface side to widen the flow path member. Can be
Furthermore, in the region Q, the second branch channel can be formed in the channel member with a higher degree of freedom as compared to the case where the first branch channel close to the head body is provided in the direction perpendicular to the liquid ejection surface. . In addition, since the plurality of flow paths can be arranged in a direction perpendicular to the liquid ejecting surface, the shape of the liquid ejecting head in the liquid ejecting surface can be reduced in size.
Here, the first flow path has a first vertical flow path that connects the first branch flow path and the head main body along the direction perpendicular to the liquid ejection surface on the first surface side. The second flow path preferably has a second vertical flow path that connects the second branch flow path and the head main body along the direction perpendicular to the liquid ejection surface on the second surface side. . According to this, the range of the 1st vertical flow path and the 2nd vertical flow path which occupies the flow path member in the planar view seen from the direction perpendicular to the liquid ejection surface is the first branch flow path and the second branch flow path. It is smaller than the range occupied by the flow paths connecting the head main body at an angle. That is, by connecting the first branch channel and the second branch channel and the head body with the first vertical channel and the second vertical channel, respectively, the size of the channel member in the plan view is reduced. It becomes possible.
A plurality of head bodies having a liquid ejection surface from which liquid is ejected; a flexible wiring board connected to each head body; and a channel member provided with a channel for supplying liquid to each head body The flow path member has a plurality of openings through which the flexible wiring board is inserted, and the flexible wiring board extends to the flow path member side with respect to the head main body, and the head main body And the flow path member are inclined toward the first surface side of both surfaces of the flexible wiring substrate, and the flow channel is formed on the liquid ejection surface on the second surface side of the both surfaces of the flexible wiring substrate. A first flow path and a second flow path are connected to the head main body, and the first flow path is on the first surface side of the flexible wiring board. ,Previous A first branch channel provided in a direction parallel to the liquid ejection surface; and a first intersecting channel connected to the plurality of first branch channels, wherein the second channel is the flexible channel On the second surface side of the wiring board, there are a second branch channel provided in a direction parallel to the liquid ejection surface, and a second cross channel connected to the plurality of second branch channels. And it is preferable that the said 1st intersection flow path and the said 2nd intersection flow path exist on the opposite side with respect to the said flexible wiring board in the surface direction of the said flexible wiring board. According to this, compared with the case where the branch channel is provided in the region P, the branch channel can be formed in the channel member with a higher degree of freedom. Further, since the intersecting flow paths are on the opposite sides of the flexible wiring board in the plane direction of the flexible wiring board, the plurality of flow paths can be arranged without being overlapped in the direction perpendicular to the liquid ejection surface, The shape of the liquid ejecting head in the direction orthogonal to the liquid ejecting surface can be reduced.
Further, the flexible wiring board has one end near the head main body in the direction perpendicular to the liquid ejecting surface and the other end far from the head main body, and the other end is more than the one end. It is preferable that a width of the flexible wiring board is narrow in the surface direction, and the second flow path is formed in the flow path member so as to pass a region outside the surface direction of the other end. According to this, the area | region which forms a 2nd flow path can be provided in the outer side of a flexible wiring board in the surface direction (direction parallel to a surface) of a flexible wiring board. Thereby, the freedom degree which arrange | positions a 2nd flow path in a flow path member further improves.
Further, it is preferable that a drive circuit is provided on the second surface side of the flexible wiring board. According to this, it can suppress more effectively that a drive circuit contacts the inner surface of an opening part by expanding the width | variety of an opening part to the 1st surface side, and can protect a drive circuit. And even if the width of the opening is widened to the first surface side, only the above-described dense region P side is further narrowed, and it is possible to avoid the sparse region Q side from becoming narrow.
According to another aspect of the invention, there is provided a liquid ejecting apparatus including the liquid ejecting head.
In this aspect, there is provided a liquid ejecting apparatus including a flow path member that can be downsized and can secure a larger region where the liquid flow path can be disposed.
According to another aspect of the present invention for solving the above-described problems, a plurality of head main bodies each having a liquid ejecting surface on which liquid is ejected, a flexible wiring substrate connected to each head main body, and a liquid supplied to each head main body And a flow path member provided with a flow path, wherein the flow path member has a plurality of openings through which the flexible wiring board is inserted, and the flexible wiring board is connected to the head body with the flow path member. Extending between the head body and the flow path member, and is inclined to the first surface side of both surfaces of the flexible wiring board, and the flow path is formed on both surfaces of the flexible wiring board. The liquid ejecting head includes a portion provided along the liquid ejecting surface on the second surface side.
In such an aspect, by inclining the flexible wiring board to the first surface side, the opening of the flow path member can also be moved to the first surface side, so that the flow path of the flow path member can be densely formed in the region that can be formed. Can be provided. A dense region on the first surface side than the opening of the flow path member is P, and a sparse region on the second surface side is Q. Thus, since the flow path can be arranged in a wider area Q, it is easy to configure an optimal flow path according to the arrangement of the head body. In particular, when providing a flow path along the liquid ejection surface, it is possible to prevent the flow path from interfering with the flexible wiring board. Further, in order to prevent interference with the flexible wiring board, the width of the liquid ejecting head in the direction is reduced compared with the case where the flow path member along the liquid ejecting surface is moved to the second surface side to widen the flow path 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 on the first surface side along the liquid ejection surface. 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 is It is preferable that the second branch flow path is closer to the head body in a direction perpendicular to the liquid ejection surface. According to this, in the region Q, the second branch channel is formed in the channel member with a higher degree of freedom compared to the case where the first branch channel close to the head 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 a direction perpendicular to the liquid ejecting surface, the shape of the liquid ejecting head in the liquid ejecting surface can be reduced in size.

  Further, the first flow path has a first vertical flow path along a direction perpendicular to the liquid ejecting surface by connecting the first branch flow path and the head body on the first surface side, The second flow path preferably includes a second vertical flow path that connects the second branch flow path and the head main body along the direction perpendicular to the liquid ejection surface on the second surface side. According to this, the range of the 1st vertical flow path and the 2nd vertical flow path which occupies the flow path member in the planar view seen from the direction perpendicular to the liquid ejection surface is the first branch flow path and the second branch flow path. It is smaller than the range occupied by the flow paths connecting the head main body at an angle. That is, by connecting the first branch channel and the second branch channel and the head body with the first vertical channel and the second vertical channel, respectively, the size of the channel member in the plan view is reduced. It becomes possible.

  In addition, a first flow path and a second flow path are connected to the head 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 flow path provided in a direction and a plurality of first cross flow paths connected to the first branch flow path, wherein the second flow path is the second of the flexible wiring board. 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 on the surface side; It is preferable that the flow path and the second intersecting flow path are on the opposite side of the flexible wiring board in the surface direction of the flexible wiring board. According to this, compared with the case where the branch channel is provided in the region P, the branch channel can be formed in the channel member with a higher degree of freedom. Further, since the intersecting flow paths are on the opposite sides of the flexible wiring board in the plane direction of the flexible wiring board, the plurality of flow paths can be arranged without being overlapped in the direction perpendicular to the liquid ejection surface, The shape of the liquid ejecting head in the direction orthogonal to the liquid ejecting surface can be reduced.

  Further, the flexible wiring board has one end near the head main body in the direction perpendicular to the liquid ejecting surface and the other end far from the head main body, and the other end is more than the one end. It is preferable that a width of the flexible wiring board is narrow in the surface direction, and the second flow path is formed in the flow path member so as to pass a region outside the surface direction of the other end. According to this, the area | region which forms a 2nd flow path can be provided in the outer side of a flexible wiring board in the surface direction (direction parallel to a surface) of a flexible wiring board. Thereby, the freedom degree which arrange | positions a 2nd flow path in a flow path member further improves.

  Further, it is preferable that a drive circuit is provided on the second surface side of the flexible wiring board. According to this, it can suppress more effectively that a drive circuit contacts the inner surface of an opening part by expanding the width | variety of an opening part to the 1st surface side, and can protect a drive circuit. And even if the width of the opening is widened to the first surface side, only the above-described dense region P side is further narrowed, and it is possible to avoid the sparse region Q side from becoming narrow.

According to another aspect of the invention, there is provided a liquid ejecting apparatus including the liquid ejecting head.
In this aspect, there is provided a liquid ejecting apparatus including a flow path member that can be downsized and can secure a larger region where the liquid flow path can be disposed.

1 is a schematic perspective view of a recording apparatus according to Embodiment 1 of the invention. FIG. 3 is an exploded perspective view of the head unit according to the first embodiment of the invention. FIG. 3 is a bottom view of the head unit according to the first embodiment of the invention. FIG. 3 is a plan view of the recording head according to the first embodiment of the invention. FIG. 3 is a bottom view of the recording head according to the first embodiment of the invention. FIG. 5 is a sectional view taken along line A-A ′ of FIG. 4. FIG. 3 is an exploded perspective view of the head body according to the first embodiment of the invention. FIG. 3 is a cross-sectional view of the head body according to the first embodiment of the 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 flow-path member which concerns on Embodiment 1 of this invention. The bottom view of the 3rd channel member concerning Embodiment 1 of the present invention. B-B 'line sectional drawing of FIGS. 11-13. FIG. 14 is a cross-sectional view taken along line C-C ′ in FIGS. 11 to 13. D-D 'line sectional drawing of FIGS. FIG. 14 is a cross-sectional view taken along the line E-E ′ of FIGS. FIG. 3 is a schematic plan view of the head body according to the first embodiment of the 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 ejecting head unit, and is also simply referred to as a head unit. An ink jet recording apparatus is an example of a liquid ejecting apparatus. FIG. 1 is a perspective view showing a schematic configuration of an 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 performs printing by transporting a recording sheet S such as paper that is an ejection target 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 unit 4 that conveys a recording sheet S, and a recording sheet S that faces the head unit 101. And a support 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 provided with the nozzle openings of the head unit 101, the direction orthogonal to the X direction is defined as the Y direction. Furthermore, let the direction orthogonal to the X direction and the Y direction be the Z direction. 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 is the Y1 side and the other is the Y2 side in the Y direction, and the liquid ejection direction side (the recording sheet S in the Z direction). 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 side by side in the Y direction, which is a direction intersecting the X direction that is the transport direction, and are fixed to the head fixing substrate 102. In the present embodiment, the plurality of recording heads 100 are arranged side by side on a straight line in the Y direction. In other words, the plurality of recording heads 100 are not displaced in the X direction. Thereby, the width of the head unit 101 in the X direction can be narrowed, and the head unit 101 can be downsized.

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

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

  The support 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, a metal or resin having a rectangular cross section, and is provided opposite to the head unit 101 between the first transport roller 5 and the second transport roller 6.

  The support member 7 may be provided with a suction unit that sucks the conveyed recording sheet S on the support member 7. Examples of the suction means include a device that sucks and sucks the recording sheet S and a device that electrostatically sucks the recording sheet S by electrostatic force. 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, each storage head 100 of the head unit 101 is connected to a liquid storage means such as an ink tank or an ink cartridge in which ink is stored so as to be able to supply ink. For example, the liquid storage unit 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 flow path or the like for supplying ink supplied from the liquid storage means to the recording head 100 may be provided inside the head fixed substrate 102, and an ink flow path member is provided on the head fixed substrate 102 to provide ink. You may make it supply the ink from a liquid storage means to the recording head 100 via a flow-path member. Of course, the ink may be directly supplied from the liquid storage means to the recording head 100 without using the head fixing substrate 102 or the ink flow path member fixed to the head fixing substrate 102.

  In such an ink jet recording apparatus 1, the recording sheet S is transported in the X direction by the first transport 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 in the X direction by the second conveying roller 6.

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

  The head unit 101 of this 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 20a provided with nozzle openings 21 on the Z1 side in the Z direction. Each recording head 100 is fixed to the side of the head fixing substrate 102 facing the recording sheet S, that is, the Z1 side that is the recording sheet S side in the Z direction.

  As described above, the plurality of recording heads 100 are arranged in a straight line in the Y direction orthogonal to the X direction, which is the transport direction, and are fixed to the head fixing substrate 102. In other words, the plurality of recording heads 100 are not displaced in the X direction. Thereby, the width of the head unit 101 in the X direction can be narrowed, and the head unit 101 can be downsized. Of course, the recording heads 100 arranged side by side in the Y direction may be shifted in the X direction, but if the recording head 100 is greatly shifted in the X direction, the width of the head fixing substrate 102 or the like in the X direction becomes wider. turn into. When the size of the head unit 101 in the X direction is increased in this way, the distance in the X direction between the first transport roller 5 and the second transport roller 6 in the ink jet recording apparatus 1 is increased, and the posture of the recording sheet S is increased. It becomes difficult to fix. Further, the head unit 101 and the ink jet recording apparatus 1 are increased in size.

  In this 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. 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 line A-A ′ of FIG. 4. 4 is a plan view of the recording head 100 on the Z2 side in the Z direction, and the holding member 120 is not shown.

  The recording head 100 includes a plurality of head main bodies 110, a COF substrate 98 connected to each head main body 110, and a flow path member 200 provided with a flow path for supplying ink to each head main body. Furthermore, in the present embodiment, the recording head 100 includes a holding member 120 that holds a plurality of head main bodies 110, a fixing plate 130 provided on the liquid ejecting surface 20 a side of the head main body 110, and a 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 an ink flow path, and is connected to a relay board 140 and a COF board from a control unit (not shown) provided in the ink jet recording apparatus 1. A control signal is transmitted via 98, and ink droplets are ejected based on the control signal. The detailed configuration of the head body 110 will be described later.

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

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

  In the present embodiment, six head bodies 110 are bonded to one flow path member 200. Of course, the number of head main bodies 110 to be fixed to one flow path member 200 is not limited to the above-described one, and there may be one head main body 110 for one flow path member 200, or two or more. It may be a plurality.

  The flow path member 200 is provided with an opening 201 penetrating in the Z direction, and a COF substrate 98 having one end connected to the head 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 formed by wiring on a flexible substrate. The COF substrate 98 also includes a drive circuit 97 (see FIG. 7) that drives pressure generating means provided in the head 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 communicating with the opening 201 provided in the flow path member 200. The opening shape of each penetration part 141 is formed larger than the opening part 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 through portion 141 and connected to a terminal (not shown) provided on the Z2 side surface of the relay substrate 140. .

  Although not particularly illustrated, the relay substrate 140 is connected to a control unit of the ink jet recording apparatus 1. For this reason, a drive signal or the like sent from the control unit is transmitted to the drive circuit 97 of the COF board 98 through the relay board 140, and the pressure generation means of the head body 110 is driven by the drive circuit 97. Thereby, the ink ejection operation of the recording head 100 is controlled.

  The holding member 120 has a holding part 121 that forms a groove-like space on the Z1 side. The holding portion 121 is provided continuously on the surface on the Z1 side of the holding member 120 over the Y direction so as to be opened on both side surfaces in the Y direction. In addition, the holding member 120 is provided with a holding portion 121 at a substantially central portion in the X direction, so that foot portions 122 are formed on both sides of the holding portion 121 in the X direction. That is, the foot part 122 is provided only on both ends in the X direction on the Z1 side surface of the holding member 120, and is not provided on both ends in the Y direction. In the present embodiment, the holding member 120 is composed of one member, but is not limited to such a mode, and a plurality of members may be stacked in the Z direction.

  In such a holding part 121, the relay substrate 140, the flow path member 200, and the plurality of head main bodies 110 are accommodated. Specifically, each head main body 110 is bonded to the Z1 side surface of the flow path member 200 with an adhesive or the like, and the relay substrate 140 is fixed to the Z2 side surface of the flow path member 200. The relay substrate 140, the flow path member 200, and the plurality of head main bodies 110 that are integrally configured in this way are accommodated in the holding portion 121.

  The holding member 120 and the flow path member 200 are bonded to each other with the adhesive portions of the holding part 121 and the flow path member 200 facing each other in the Z direction. The relay substrate 140 is accommodated in a space sandwiched between the holding part 121 and the flow path member 200. Note that the holding member 120 and the flow path member 200 may be integrated by a fixing means such as a screw instead of bonding with an adhesive.

  In addition, although not particularly shown, the holding member 120 is formed with a flow path through which ink flows, a filter that captures foreign matters, and the like. The flow paths of these holding members 120 are in communication with the liquid flow paths of the flow path member 200. As a result, the ink from the liquid storage means provided in the ink jet recording apparatus 1 is supplied to the head body 110 via the holding member 120 and the flow path member 200.

  The fixing plate 130 is a member that 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 holds each recording head 100. The fixed 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 20a side, and a bent portion 132 provided by bending both end portions in the Y direction of the base portion 131 to the Z2 side in the Z direction. It has.

  Further, the base 131 is provided with an exposure opening 133 that is an opening for exposing the nozzle opening 21 of each head 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 this embodiment has six head bodies 110, the base portion 131 is provided with six independent exposure openings 133. Of course, depending on the configuration of the head main body 110 and the like, one common exposed opening 133 may be provided for the head main body group including a plurality of head main bodies 110.

  Such a base portion 131 covers the Z1 side of the holding portion 121 of the holding member 120. As shown in FIG. 6, the base portion 131 is joined to the Z1 side surface of the holding member 120 in the Z direction, that is, the end surface on the Z1 side of the foot portion 122 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 that opens 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 portion of the base portion 131 in the Y direction to the edge portion of the fixed plate 130. And such a bending part 132 is joined 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 bonded to the holding member 120 with an adhesive, whereby the head main body 110 is disposed in the holding portion 121 that is a space between the holding member 120 and the fixing plate 130.

  As described above, the recording head 100 according to the present embodiment provides a plurality of head main bodies 110 with respect to one recording head 100 to increase the number of nozzle rows, so that one recording head 100 is provided. The yield can be improved as compared with the case where a plurality of nozzle rows are provided in only one head main body 110 to increase the number of rows. That is, increasing the number of nozzle rows in the single head main body 110 decreases the yield of the head main body 110 and increases the manufacturing cost. On the other hand, by increasing the number of nozzle rows by using 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.

  The opening on the side surface in the Y direction of the holding member 120 is sealed by the bent portion 132 of the fixing plate 130. Thereby, even if there is no foot part for bonding to the base part 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), the holding member 120 is provided on the side face in the Y direction. Moisture evaporation from the formed opening can be suppressed.

  Therefore, the head unit 101 in which the recording heads 100 are arranged in the Y direction does not have the foot portion 122 on the side of the recording head 100 adjacent in the Y direction, so that the interval between the recording heads 100 adjacent in the Y direction is reduced. Can do. Thereby, 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 to each other 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 bonded to the surface of the holding member 120 on the Z1 side, and the bent portions 132 may be provided on both sides of the fixing plate 130 in the X direction and the Y direction. That is, the fixed plate 130 is provided with a bent portion 132 over the entire circumference in the in-plane direction of the liquid ejection surface 20a, and the fixed plate 130 is bonded over the entire circumference of the side surface of the holding member 120. Also good. However, by providing the foot portions 122 on both sides in the X direction of the holding member 120 as in the present embodiment, the end surface on the Z1 side of the foot portion 122 is bonded to the base portion 131 of the fixing plate 130, so that ink jet recording is performed. The strength of the head 100 in the Z direction can be improved, and moisture evaporation from the foot 122 can be suppressed.

  The head main body 110 will be described with reference to FIGS. 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 body 110 is not limited to the following configuration.

  The head main body 110 of this embodiment includes a pressure generation chamber 12, a nozzle opening 21, a manifold 95, pressure generation means, and the like. For this purpose, 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 together with an adhesive or the like.

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

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

  A communication plate 15 is bonded to one surface side of the flow path forming substrate 10. Further, a nozzle plate 20 provided with a plurality of nozzle openings 21 communicating with each pressure generating chamber 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 are open is the liquid ejection surface 20a.

  The communication plate 15 is provided with a nozzle communication path 16 that communicates the pressure generation chamber 12 and the nozzle opening 21. The communication plate 15 has a larger area than the flow path forming substrate 10, and the nozzle plate 20 has a smaller area than the flow path forming substrate 10. Thus, cost reduction can be achieved by making the area of the nozzle plate 20 relatively small.

  The communication plate 15 is provided with a first manifold 17 and a second manifold 18 that constitute a part of the manifold 95. The first manifold 17 is provided through the communication plate 15 in the Z direction. The second manifold 18 opens to the nozzle plate 20 side of the communication plate 15 without penetrating the communication plate 15 in the Z direction, and is provided halfway in the Z direction.

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

  In the nozzle plate 20, nozzle openings 21 communicating with the pressure generation chambers 12 through the nozzle communication passages 16 are formed. A plurality of nozzle openings 21 are juxtaposed in the Xa direction, and each of the juxtaposed nozzle openings 21 forms two nozzle rows a and b, and the nozzle row a and nozzle row b are juxtaposed in the Ya direction. ing. In the present embodiment, although details will be described later, each of the nozzle row a and the nozzle row b is divided into two so that two types of liquid can be ejected in one row.

  On the other hand, a diaphragm 50 is formed on the surface of the flow path forming substrate 10 opposite to the communication plate 15. In addition, the first electrode 60, the piezoelectric layer 70, and the second electrode 80 are sequentially stacked on the vibration plate 50, thereby configuring the piezoelectric actuator 300 that is a pressure generating unit of the present embodiment. In general, one electrode 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.

  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 that 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 portion 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. Has been.

  A case 40 that defines a manifold 95 that communicates with the plurality of pressure generation 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 a plan view, and is bonded to the protective substrate 30 and is also bonded to the communication plate 15 described above. Specifically, the case 40 has a recess 41 having a depth in which the flow path forming substrate 10 and the protective substrate 30 are accommodated on the protective substrate 30 side. The concave portion 41 has an opening area larger than the surface of the protective substrate 30 bonded 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 where the flow path forming substrate 10 and the like are accommodated in the recess 41. Accordingly, a third manifold 42 is defined by the case 40, the flow path forming substrate 10, and the protective substrate 30 on the outer peripheral portion of the flow path forming substrate 10. The third manifold 42 and the first manifold 17 and the second manifold 18 provided on the communication plate 15 constitute a manifold 95 of the present embodiment. As described above, since two types of liquid can be ejected by one nozzle row, the first manifold 17, the second manifold 18 and the third manifold 42 constituting the manifold 95 are respectively arranged in the nozzle row. The direction is divided into two in the Xa direction. For example, as shown in FIG. 7, the first manifold 17 includes 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 arranged symmetrically with the nozzle row a and the nozzle row b interposed therebetween, respectively. According to this, it is also possible to eject different liquids for each nozzle row a and nozzle row b. Of course, the arrangement of the manifold is not limited to this.

  Further, in this embodiment, the manifold corresponding to each nozzle row is divided into two in the Xa direction so that four types of liquids can be ejected as will be described later. In addition, a manifold formed for each nozzle row b may be used, or a single manifold common to two rows of the nozzle row a and the nozzle row b may be used.

  A compliance substrate 45 is provided on the surface of the communication plate 15 where the first manifold 17 and the second manifold 18 open. 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 this embodiment. The sealing film 46 is formed of a flexible thin film (for example, polyphenylene sulfide (PPS), stainless steel (SUS), etc.). The fixed substrate 47 is made of a hard material such as a metal such as stainless steel (SUS). Since the region of the fixed substrate 47 facing the manifold 95 is an opening 48 that is completely removed in the thickness direction, one surface of the manifold 95 is sealed only by the flexible sealing film 46. The compliance portion 49 is a flexible portion.

  The fixing plate 130 is bonded to the surface of the compliance substrate 45 opposite to the communication plate 15. That is, the exposed opening 133 provided in the base portion 131 of the fixed plate 130 has an opening area larger than the area of the nozzle plate 20, and exposes the liquid ejection surface 20 a of the nozzle plate 20 in the exposed 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 contacts the liquid ejection surface 20a of the nozzle plate 20. You may make it contact | connect or adhere | attach. Even if the exposed opening 133 of the fixed plate 130 has a smaller opening area than the outer shape of the nozzle plate 20, the fixed plate 130 and the liquid ejection surface 20a may be provided so as not to contact each other. That is, the fact that the fixed plate 130 is provided on the liquid ejecting surface 20a includes not only the one that is not in contact with the liquid ejecting surface 20a but also the one that is in contact with the liquid ejecting surface 20a.

  The case 40 is provided with an introduction path 44 that communicates with the manifold 95 and supplies ink to each manifold 95. The case 40 is provided with a connection port 43 that communicates 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 ink is ejected, the ink is taken in from the storage unit 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, in accordance with a signal from the drive circuit 97, a voltage is applied to each piezoelectric actuator 300 corresponding to the pressure generation chamber 12 to bend and deform the diaphragm together with the piezoelectric actuator 300. As a result, the pressure in the pressure generating chamber 12 is increased and ink droplets are ejected from the predetermined nozzle openings 21.

  Here, using FIG. 5 and FIG. 9, the parallel arrangement direction of the nozzle openings 21 constituting the nozzle row of the head main body 110 is provided to be inclined with respect to the X direction that is the conveyance direction of the recording sheet S. The point will be described in detail. FIG. 9 is an explanatory view schematically showing the arrangement of the nozzle openings of the head body according to the present embodiment.

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

  Note that the fact that the X direction and the Xa direction intersect at an angle greater than 0 degree and less than 45 degrees means that the nozzle row is directed in the X direction rather than a straight line intersecting the X direction at 45 degrees within the plane of the liquid ejection surface 20a. It means a state that is more inclined. The interval D1 here is an interval between the nozzle openings 21 when the nozzle openings 21 of the nozzle row a and the nozzle row b are projected in the X direction with respect to the virtual line in the Y direction. Further, the 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 Y direction with respect to the virtual line in the X direction is defined as D2.

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

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

  Furthermore, by disposing at least some of the nozzle openings 21 in the same color nozzle row of the adjacent head main bodies 110 so as to overlap each other in the X direction, the image quality of the joint between the head main bodies 110 can be improved. Can do. That is, for example, one nozzle opening 21 of the magenta nozzle row a of the head main body 110a and one nozzle opening 21 of the magenta M nozzle row a of the head main body 110b are arranged so as to overlap each other in the X direction. In addition, by controlling the ejection from the two nozzle openings 21 that overlap each other, it is possible to prevent image quality degradation such as banding and streaking at the joint between the adjacent head bodies 110. 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 particularly illustrated, the nozzles may be arranged so that four colors of black Bk, magenta M, cyan C, and yellow Y can be ejected by one nozzle row.

  As described above, four recording heads 100 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 a straight line L in FIG. They are arranged so that part of the nozzle rows overlap in the X direction. That is, similarly to the relationship between adjacent head main bodies 110 in one recording head 100, adjacent head main bodies 110 are provided adjacent to each other in the Y direction between the adjacent recording heads 100 in the Y direction. A color image can be printed between 100 and the image quality of the joint between adjacent recording heads 100 can be improved. Of course, the number of nozzle openings 21 that overlap in the X direction between adjacent recording heads 100 need not be the same as the number of nozzle openings 21 that overlap in the X direction between the head bodies 110 in one recording head 100.

  Thus, the nozzle row between the head main bodies 110 and the nozzle row between the recording heads 100 partially overlap in the X direction, so that the image quality of the joint can be improved.

  In addition, the nozzle pitch and the angle between the X direction and the Xa direction are set so that the X direction interval D1 and the Y direction interval D2 have an integer ratio between the nozzle openings 21 adjacent to each other in the Xa direction of each nozzle row. Is preferred. According to this, when printing image data composed of pixels arranged in a matrix in the X direction and the Y direction, it is easy to associate each nozzle with a pixel. 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 a substantially parallelogram when viewed from the liquid ejection surface 20 a side. This is because, as described above, the Xa direction, which is the juxtaposed direction of the nozzle openings 21 constituting the nozzle row a and the nozzle row b of each head body 110, is inclined with respect to the X direction, which is the conveyance direction of the recording sheet S. Since the outer shape of the recording head 100, that is, the fixed plate 130 is formed to be a substantially parallelogram in the same manner as the Xa direction, which is the direction in which the nozzle row a and the nozzle row b are inclined. It is. Of course, the shape of the recording head 100 when viewed from the liquid ejection surface 20a 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 body has been described. However, even if the nozzle body has three or more nozzle rows, the above-described effects can be obtained. Needless to say. If the number of nozzle rows provided in one head body 110 is two as in the present embodiment, each of the two manifolds 95 corresponding to each nozzle row as shown in FIG. Since the nozzle openings 21 of the nozzle rows can be arranged, compared to the case where the nozzle openings 21 of the plurality of nozzle rows are arranged on the same side with respect to the manifold corresponding to each nozzle row, two nozzle rows Can be narrowed in the Ya direction. Therefore, the area required for one nozzle plate 20 with respect to two nozzle rows can be reduced. In addition, the connection between the piezoelectric actuators 300 of the two nozzle rows and the COF substrate 98 is facilitated.

  In the present embodiment, each nozzle row a, b has the same number of nozzle openings 21. According to this, the number of overlaps 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 is not necessarily the same. Further, the types of liquids ejected by the nozzle rows a and b may all be the same, for example, all the same color inks may be used.

  In the present embodiment, the head main body 110 preferably has 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, you may provide another nozzle plate 20 for every nozzle row. The nozzle plate 20 is made of a stainless steel (SUS) plate or a silicon substrate.

  The flow path member 200 according to the present embodiment will be described in detail with reference to FIGS. 10 is a plan view of the first flow path member as the flow path member 200, FIG. 11 is a plan view of the second flow path member as the flow path member 200, and FIG. FIG. 13 is a bottom view of the third flow path member, FIG. 14 is a cross-sectional view taken along the line BB ′ of FIGS. 10 to 13, and FIG. FIG. 16 is a cross-sectional view taken along line CC ′ of FIG. 13, and FIG. 16 is a cross-sectional view taken along 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 channel member 200 is a member provided with a channel 240 through which ink flows. In the present embodiment, the first flow path member 210, the second flow path member 220, the third flow path member 230, and a 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 this mode, and for example, fixing such as a screw The first flow path member 210, the second flow path member 220, and the third flow path member 230 may be integrated by means. Further, although there is no particular limitation on the material, for example, it can be formed of a metal such as SUS or a resin.

  The flow path 240 has both ends of an introduction flow path 280 into which ink supplied from an upstream member (the holding member 120 in the present embodiment) 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 each flow path 240 is supplied with ink to one introduction flow path 280 and branches in the middle, and the ink is supplied from the plurality of connection portions 290 to the head main body 110. It is comprised so that it may supply.

  Among the four channels 240, a part is a first channel 241 and the rest is a second channel 242. In the present embodiment, two first flow paths 241 and two second flow paths 242 are formed. Each of the two first channels 241 is referred to as a first channel 241a and a first channel 241b. Henceforth, when it describes as the 1st flow path 241, both the 1st flow path 241a and the 1st flow path 241b shall be pointed out. The same applies to the second flow path 242.

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

  Specifically, the first introduction flow path 281a has a through hole 211 that opens in the top surface of the protrusion 212 provided on the Z2 side surface of the first flow path member 210 and penetrates in the Z direction. A through hole 221 that penetrates the flow path member 220 in the Z direction communicates therewith. The same applies to the first introduction flow path 281b. Hereinafter, when the first introduction flow path 281 is described, the first introduction flow path 281a and the first introduction flow path 281b are indicated.

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

  Specifically, the second introduction flow path 282a is a through hole that opens in the top surface of the protrusion 213 provided on the Z2 side surface of the first flow path member 210 and penetrates in the Z direction. The same applies to the second introduction channel 282b. Hereinafter, when the second introduction channel 282 is described, the second introduction channel 282a and the second introduction channel 282b are indicated.

  Furthermore, when the introduction channel 280 is described, all of the above-described four introduction channels are indicated.

  In the present embodiment, in the plan view shown in FIG. 10, the first introduction flow path 281 a is disposed in the vicinity of the upper left corner of the first flow path member 210, and the first flow path is in the vicinity of the lower right corner of the first flow path member 210. An introduction channel 281b is disposed. 10, the second introduction channel 282a is disposed in the vicinity of the upper right corner of the first channel member 210, and the second introduction channel in the vicinity of the lower left corner of the first channel 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 channel 251 is a part of the first channel 241 that circulates ink in a direction parallel to the liquid ejection surface 20a. In the present embodiment, since the two first flow paths 241 are formed, two first cross flow paths 251 are also formed. Each of the two first intersecting channels 251 is referred to as a first intersecting channel 251a and a first intersecting channel 251b.

  The first intersecting channel 251a includes an intersecting groove 226a formed on the Z1 side surface of the second channel member 220 along the Y direction, and the Z2 side surface of the third channel member 230 along the Y direction. It is formed by sealing together with the formed intersecting groove portion 231a. The first intersecting channel 251b includes an intersecting groove 226b formed on the Z1 side surface of the second channel member 220 along the Y direction and a Z2 side surface of the third channel member 230 along the Y direction. It is formed by sealing together with the formed intersecting groove portion 231b.

  For any of the first intersecting channels 251a and 251b, the first intersecting channels 251a, 231b, The cross-sectional area of each 251b is expanded, and the pressure loss in the first intersecting flow paths 251a and 251b is reduced. The first intersecting flow paths 251a and 251b may be formed by intersecting groove portions 226a and 226b formed only in the second flow path member 220, or formed only in the third flow path member 230. The crossing groove portions 231a and 231b may be formed. For example, by forming the cross groove portions 226a and 226b only in the second flow path member 220 on the Z2 side, as will be described later, the COF substrate 98 whose width in the Xa direction becomes narrower from the Z1 side to the Z2 side, The degree of freedom of arranging the first flow path 241 can be improved while preventing interference with the first cross flow paths 251a and 251b.

  The first cross flow channel 251a and the first cross flow channel 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 part of the second flow path 242 that circulates ink in a direction parallel to the liquid ejecting surface 20a. In the present embodiment, since the two second flow paths 242 are formed, two second cross flow paths 252 are also formed. Let each of the two 2nd cross flow paths 252 be the 2nd cross flow paths 252a and the 2nd cross flow paths 252b.

  The second intersecting flow path 252a includes an intersecting groove portion 213a formed along the Y direction on the Z1 side surface of the first flow path member 210 and a Z2 side surface of the second flow path member 220 along the Y direction. It is formed by sealing together with the formed intersecting groove portion 222a. The second intersecting channel 252b includes an intersecting groove 213b formed on the surface on the Z1 side of the first channel member 210 and an intersecting groove formed on the surface on the Z2 side of the second channel member 220 along the Y direction. It is formed by sealing together with 222b.

  For any of the second cross flow channels 252a, 252b, by forming cross groove portions 213a, 213b, 222a, 222b in the first flow channel member 210 and the second flow channel member 220, respectively, the second cross flow channels 252a, The cross-sectional area of each 252b is expanded to reduce the pressure loss in the second intersecting flow paths 252a and 252b. 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 may be formed only by the second flow path member 220. Alternatively, the crossing grooves 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, the first cross flow paths 251a and 251b described above can prevent interference with the COF substrate 98 while preventing the interference with the COF substrate 98. The degree of freedom of arranging the two flow paths 242 can be improved.

  The second cross flow channel 252a and the second cross flow channel 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.

  Henceforth, when describing it as the 1st cross flow channel 251, it shall point out both the 1st cross flow channel 251a and the 1st cross flow channel 251b. When it is described as the second cross flow channel 252, it indicates both the second cross flow channel 252 a and the second cross flow channel 252 b. Moreover, when it describes as the cross flow path 250, it shall point out all the four cross flow paths mentioned above.

  In the present embodiment, the first flow path 241 is configured to branch from one introduction flow path 280 to a plurality of connection portions 290. That is, from the first intersecting channel 251, a plurality of first branch channels 261 are the same plane as the first intersecting channel 251 (boundary surface where the second channel member 220 and the third channel member 230 are joined). Branches at

  In the present embodiment, six first branch channels 261 from the first intersecting channel 251 in a plane parallel to the liquid ejection surface 20a (a boundary surface between the second channel member 220 and the third channel member 230). Is branched. Each of the six first branch channels 261 branched from the first cross channel 251a is referred to as a first branch channel 261a1 to a first branch channel 261a6. Henceforth, when describing with the 1st branch flow path 261a, all the 6 branch flow paths connected to the 1st branch flow path 261a shall be pointed out.

  Similarly, each of the six first branch channels 261 branched from the first intersecting channel 251b is referred to as a first branch channel 261b1 to a first branch channel 261b6. Henceforth, when describing with the 1st branch flow path 261b, all the 6 branch flow paths connected to the 1st branch flow path 261b shall be pointed out. Furthermore, when it describes as the 1st branch flow path 261, it shall point out all the 12 branch flow paths connected to the 1st branch flow path 261a and the 1st branch flow path 261b.

  In the figure, of the six first branch channels 261a1 to 261a6 arranged in the Y direction, the reference numerals of the first branch channels 261a2 to 261a5 are omitted. , And are arranged in order from the Y1 side to the Y2 side. The same applies to the first branch channel 261b1 to the first branch channel 261b6.

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

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

  For any of the first branch flow paths 261a, 261b, the first branch flow paths 261a, 232b are formed by forming the branch groove portions 227a, 227b, 232a, 232b in the second flow path member 220 and the third flow path member 230, respectively. The cross-sectional area of each 261b is expanded to reduce the pressure loss in the first branch flow paths 261a and 261b. The first branch channels 261a and 261b may be formed by the branch groove portions 227a and 227b formed only in the second channel member 220, or may be formed only in the third channel member 230. It may be formed by the intersecting groove portions 232a and 232b. For example, as will be described later, in the region Q where the width in the Ya direction widens from the Z1 side toward the Z2 side by inclining in the Ya direction, the branch groove portions 227a and 227b are formed only in the second flow path member 220 on the Z2 side. By forming it, the freedom degree which arrange | positions the 1st flow path 241 can be improved, preventing interference with the COF board | substrate 98. FIG. In addition, in the region P where the width in the Ya direction increases from the Z2 side toward the Z1 side, the branch groove portions 232a and 232b are formed only in the third flow path member 230 on the Z1 side, thereby preventing interference with the COF substrate 98. While preventing, the freedom degree which arrange | positions the 1st flow path 241 can be improved.

  The second flow path 242 is configured to branch from one introduction flow path 280 to a plurality of connection portions 290. Although details will be described later, a plurality of second branch channels 262 are connected to the same plane as the second cross channel 252 from the second cross channel 252 (the first channel member 210 and the second channel member 220 are joined together). Branching at the boundary).

  In the present embodiment, six second branch channels 262 from the second intersecting channel 252 in a plane parallel to the liquid ejection surface 20a (a boundary surface between the first channel member 210 and the second channel member 220). Is branched. Each of the six second branch channels 262 branched from the second cross channel 252a is referred to as a second branch channel 262a1 to a second branch channel 262a6.

  Similarly, each of the six second branch channels 262 branched from the second cross channel 252b is referred to as a second branch channel 262b1 to a second branch channel 262b6.

  Henceforth, when describing with the 2nd branch flow path 262a, all the 6 branch flow paths connected to the 2nd branch flow path 262a shall be pointed out. When described as the second branch flow path 262b, all the six branch flow paths connected to the second branch flow path 262b are pointed out. Moreover, when describing 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 it describes as the branch flow path 260, it shall point out all the 24 branch flow paths mentioned above.

  In the drawing, among the six second branch channels 262a1 to 262a6 arranged in the Y direction, the reference numerals of the second branch channels 262a2 to 262a5 are omitted. , And are arranged in order from the Y1 side to the Y2 side. The same applies to the second branch flow path 262b1 to the second branch flow path 262b6.

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

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

  For any of the second branch flow paths 262a, 262b, the second branch flow paths 262a, 223b are formed by forming the branch groove portions 214a, 214b, 223a, 223b in the first flow path member 210 and the second flow path member 220, respectively. The cross-sectional area of each 262b is expanded, and the pressure loss in the second branch flow paths 262a and 262b is reduced. The second branch flow paths 262a and 262b may be formed by the branch groove portions 214a and 214b formed only in the first flow path member 210, or may be formed only in the second flow path member 220. It may be formed by the branch groove portions 223a and 223b. For example, as will be described later, in the region Q in which the width in the Ya direction widens from the Z1 side toward the Z2 side by inclining in the Ya direction, the branch groove portions 214a and 214b are formed only in the first flow path member 210 on the Z2 side. By forming, the freedom degree which arrange | positions the 2nd flow path 242 can be improved, preventing interference with the COF board | substrate 98. FIG. Further, in the region P in which the width in the Ya direction increases from the Z2 side toward the Z1 side, the branch groove portions 223a and 223b are formed only in the second flow path member 220 on the Z1 side, thereby preventing interference with the COF substrate 98. While preventing, the freedom degree which arrange | positions the 2nd flow path 242 can be improved.

  A first vertical flow path 271 is connected to the first branch flow path 261 at the end opposite to the first cross flow path 251. Specifically, the first vertical flow path 271 is formed as a through-hole penetrating the third flow path member 230 in the Z direction.

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

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

  In this 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 described as the first vertical flow path 271a, it refers to the first vertical flow path 271a1 to 271a6, and when described as the first vertical flow path 271b, it refers to the first vertical flow path 271b1 to 271b6, When the first vertical flow path 271 is described, all of the first vertical flow path 271a and the first vertical flow path 271b are indicated.

  Similarly, when described as the second vertical flow path 272a, it refers to the second vertical flow path 272a1 to 272a6, and when described as the second vertical flow path 272b, it refers to the second vertical flow path 272b1 to 272b6. When the second vertical flow path 272 is described, all of the second vertical flow path 272a and the second vertical flow path 272b are indicated.

  Further, when the vertical channel 270 is described, it indicates all the 24 vertical channels described above.

  In the figure, out of the six first vertical flow paths 271a1 to 271a6 arranged in the Y direction, the reference numerals of the first vertical flow paths 271a2 to 271a5 are omitted. , And are arranged in order from the Y1 side to the Y2 side. 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 path 270 described above has a connection portion 290 that is an opening on the Z1 side of the third flow path member 230. As will be described in detail later, the connection portion 290 communicates with the introduction path 44 provided in the head main body 110.

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

  The first connection portion 291a1, the first connection portion 291b1, the second connection portion 292a1, and the second connection portion 292b1 are connected to one of the six head bodies 110. 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 body 110.

  Hereinafter, when described as the first connection portion 291a, it refers to the first connection portion 291a1 to 291a6, and when described as the first connection portion 291b, it refers to the first connection portion 291b1 to 291b6, Reference numeral 291 denotes all of the first connection portion 291a and the first connection portion 291b.

  Similarly, when described as the second connection portion 292a, it refers to the second connection portions 292a1 to 292a6, and when described as the second connection portion 292b, it refers to the second connection portions 292b1 to 292b6, When it is described as the portion 292, it refers to all of the second connection portion 292a and the second connection portion 292b.

  Furthermore, when the connection portion 290 is described, it indicates all the 24 connection portions described above.

  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 that serves as an ink inlet to the cross flow path 250, branches from the cross flow path 250 to the branch flow path 260, and the vertical flow path 270. In addition, the plurality of head main bodies 110 are connected to each other via the connection unit 290.

  In the present 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 is supplied to the first flow path 241b, black Bk is supplied to the second flow path 242a, and magenta M is supplied to the second flow path 242b. Each color ink flows through the first flow path 241a, the first flow path 241b, the second flow path 242a, and the second flow path 242b, and is supplied to each head body 110.

  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 that is inclined with respect to the Z direction and penetrates. The second flow path member 220 is formed with a second opening 225 that is inclined with respect to the Z direction and penetrates therethrough. The third flow path member 230 is formed with a third opening 235 that is inclined with respect to the Z direction and passes therethrough.

  The first opening 215, the second opening 225, and the third opening 235 communicate with each other to form one opening 201. The opening 201 has a long opening shape 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 includes a lower end 98 c that is one end close to the head main body 110 in the Z direction and another end far from the head main body 110 in the Z direction. And an upper end 98d. The width in the Xa direction of the upper end portion 98d is formed to be narrower than the width in the Xa direction of the lower end portion 98c. That is, with respect to the width in the surface direction of the flexible wiring board 98, the other end is formed to be narrower than the one end.

  In this embodiment, the portion of the COF substrate 98 inserted through 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 through the second opening 225 is Z1. A trapezoidal shape is formed so that the width in the Xa direction becomes narrower from the side toward the Z2 side.

  On the other hand, the opening 201 of the flow path member 200 extends from the first opening 236 (that is, the opening on the Z1 side of the third opening 235) close to the head main body 110 in the Z direction perpendicular to the liquid ejection surface 20a and the head main body 110. A distant second opening 216 (that is, 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 becomes narrower from Z1 to Z2 in the Z direction. Specifically, the opening 201 is configured to accommodate the COF substrate 98, and the width of the opening 201 in the Xa direction is slightly wider than the width of the COF substrate 98 in the Xa direction.

  The inclination of the COF substrate 98 inserted through 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 EE ′ of FIGS. 10 to 13, and is a schematic side view of one of the recording heads according to the present embodiment as viewed from the Xa2 side in the Xa direction to the Xa1 side. It is. FIG. 17B is a schematic side view of the head body according to the comparative example as viewed from the Xa2 side in the Xa direction to the Xa1 side.

  As shown in FIG. 17A, the flow path member 200 is provided with one opening 201 by communicating the first opening 215, the second opening 225, and the third opening 235. Here, the surface of the COF substrate 98 passing through the first opening 236 on the head main body 110 side of the opening 201 of the flow path member 200 and the second opening 216 on the opposite side of the head main body 110 is a plane B (however, 17 (a), the plane A intersects with the plane B at the first opening 236, is parallel to the Xa direction, and is perpendicular to the liquid ejection surface 20a. The plane B, which is the surface of the COF substrate 98, intersects the plane A perpendicular to the liquid ejection 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 at a predetermined distance from the corresponding first openings 236 on the Ya2 side in the Ya direction. 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 in the Ya direction toward the Ya2 side.

  The COF substrate 98 extends from the connection port 43 (see FIG. 8) provided on the head main body 110 side toward the flow path member 200. The COF substrate 98 is connected to the head main body 110 and the relay substrate 140 (see FIG. 2). The channel member 200 between them is inclined toward one side of the COF substrate 98. Here, of both 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 surface that does not face the plane A, that is, a surface on the Ya2 side in the Ya direction. The second surface 98b of the COF substrate 98 is a surface facing the plane A, that is, a surface on the Ya1 side in the Ya direction.

  In addition, “the COF substrate 98 is inclined toward the first surface 98a in the flow path member 200 between the head main body 110 and the relay substrate 140” means that among the COF substrates 98, the head main body 110 to the flow path member 200. That is, the portion up to the second opening 216 corresponding to the outlet of the opening 201 is inclined toward the first surface 98a. Therefore, the portion 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 interval from the portion of the inclined COF substrate 98 closest to the opening 201 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 first flow path 215, and the second flow path member 230 are spaced apart from the inclined COF substrate 98. The widths of the two openings 225 and the third opening 235 in the Ya direction 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 penetrating along the Z direction, as viewed from the Xa direction. The shape of the opening 201 is stepped as shown in FIG. Of course, the opening 201 may be inclined along the inclination of the COF substrate 98. The COF substrate 98 inserted into the opening 201 is inclined to the first surface 98a 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 of the head body 110 on the Z2 side, and is provided on the Ya1 side with respect to the connection port 43 of the COF substrate 98. The introduction path 44 provided and the introduction path 44 provided on the Ya2 side are arranged such that the distance between the connection port 43 in the Ya direction is substantially the same. On the other hand, the COF substrate 98 is arranged so that the connection portion is located at the approximate center of the connection port 43 in order to easily perform electrical connection with the lead electrode 90 from both sides in the Ya direction of the COF substrate 98. Yes. In other words, the COF substrate 98 is disposed close to the side surface on one side of the connection port 43 in the Ya direction (the Ya1 side in FIG. 8), and as a result, the COF substrate 98 is connected to any introduction path 44 in the Ya direction. Arranged close together. However, in the flow path member 200, the distance in the Ya direction from the COF substrate 98 is substantially constant on both the Ya1 side and the Ya2 side, thereby preventing contact between the flow path member 200 and the COF substrate 98. , Ya size reduction.

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

  This will be described in detail with reference to FIGS. FIG. 18 is a schematic plan view of one head body of the recording heads according to this embodiment as viewed from the Z2 side in the Z direction to the Z1 side.

  As shown in FIG. 18, four introduction paths 44 are formed around the connection port 43 on the surface of the head body 110 on the Z2 side (see FIG. 7). Specifically, the two introduction paths 44 a and 44 b are opened closer to the Ya 1 side in the Ya direction than 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 open to the Ya2 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 communicate with each other.

  The introduction path 44a includes the second flow path 242a, that is, the second introduction flow path 282a (see FIG. 14), the second cross flow path 252a, the second branch flow path 262a, the second vertical flow path 272a, and the 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 cross 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 cross 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 cross 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 the introduction path 44a to the introduction path 44d, the first flow path 241 and the second flow path 242 is the same for the six head bodies 110.

  Thus, the first flow path 241 is connected to the head main body 110 on the first surface 98a side of the COF substrate 98. The second flow path 242 is connected to the head 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 side). When the opening 201 is inclined toward the first surface 98a in this way, it is possible to provide density in a region where the flow path 240 of the flow path member 200 can be formed.

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

  In the present embodiment, the first surface in the Ya direction of the region T facing the head body 110 of the first flow path member 210, the second flow path member 220, and the third flow path member 230 that configures the flow path member 200. The 98a side is the region P, and the second surface 98b side is the region Q. In the figure, hatching indicating these regions P and Q is given.

  In the present embodiment, as shown in FIG. 17A, due to the inclination of the COF substrate 98, the region Q is in the Ya direction on the surface on the Z1 side of the first flow path member 210, which is one of the same surfaces described above. The width of the region P is narrowed by the width U1. Similarly, on the surface on the Z2 side of the second flow path member 220, which is one of the same surfaces as described above, the region Q widens by the width U2 in the Ya direction, and the region P has a width in the Ya direction correspondingly. It is narrower.

  The width of the region Q in the Ya direction becomes 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 density difference between the region P and the region Q than the second flow path member 220. Similarly, the second channel member 220 has a larger density difference between the region P and the region Q than the third channel member 230. That is, in the flow path member 200, the difference in density between the region P and the region Q increases as it goes from the head body 110 to the relay substrate 140.

  In such a sparse region Q, the second branch flow path 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 ejection surface 20a” means that at least a part of the flow path constituting the second flow path 242 is in the above-described area Q. That is, it is provided in a plane parallel to the liquid ejecting surface 20a and then connected to the introduction path 44 of the head body 110.

  In the present embodiment, the second branch flow path 262a of the second flow path 242a is provided in the region Q. Further, the second branch channel 262b of the second channel 242b is provided in the region Q.

  In the recording head 100 according to the present embodiment, the COF substrate 98 is inclined toward the first surface 98a, so that the opening 201 of the flow path member 200 can also be moved and provided toward the first surface 98a. Density can be provided in an area where the flow path 240 of the path member 200 can be formed. Thereby, the second branch flow path 262 constituting the second flow path 242 can be arranged in the area Q wider than the area P. That is, since the second branch flow path 262 can be arranged in a wider area Q, it is easy to configure the optimal second flow path 242 according to the arrangement of the head body 110 and the like. In other words, the wider the region Q, the higher the degree of freedom of arrangement of the second flow path 242. The degree of freedom of arrangement of the second channel 242 here is a concept proportional to the width of the region Q in the Ya direction, and the higher the degree of freedom, the easier the second channel 242 is formed in the region Q. means. Note that the second flow path 242 of the present embodiment corresponds to a flow path having a portion provided along the liquid ejection surface on the second surface side of the present invention, and the second branch flow path 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, the sparse region Q whose width is widened in the Ya direction can be formed by inclining the COF substrate 98. Since the width in the Ya direction is increased in this way, the second branch flow path 262 constituting a part of the second flow path 242 can be formed 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 reduced as compared with the comparative example described later. The flow path member 200 can be reduced in size in the Ya direction, whereby the width of the recording head 100 in the Ya direction can be reduced.

  Furthermore, as described above, in this embodiment, the COF substrate 98 is disposed close to the side surface of the connection port 43 on the Ya1 side, and as a result, the COF substrate 98 is disposed in the introduction path 44 on the Ya1 side of the connection port 43. Arranged close together. The branch flow path 260 connected to the introduction path 44 via the vertical flow path 270 is spaced from the COF substrate 98 in the Ya direction, so that the branch flow path 260 on the Ya1 side of the COF substrate 98 is arranged. The degree of freedom is narrowing. However, by inclining the COF substrate 98 to the opposite Ya2 side, even in such a case, the degree of freedom of arrangement of the branch flow path 260 on the Ya1 side of the COF substrate 98 is increased, and the flow path member The size of 200 in the Ya direction can be reduced.

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

  The interval in the Ya direction between the second opening 225 and the second branch flow path 262a shown in FIG. On the other hand, FIG. 17B shows a schematic side view of a recording head according to a 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 there is.

  In the recording head 100 ′, in order to form the second branch flow path 262a ′ provided in the plane parallel to the liquid ejection surface 20a without interfering with the COF substrate 98 in the Ya direction, the same interval as the recording head 100 is provided. If formed while maintaining V, the second branch channel 262a ′ must be provided on the Ya1 side in the Ya direction by the width U widened in the recording head 100. Therefore, in the recording head 100 ′ according to the comparative example, the distance between the second branch flow path 262 a ′ and the plane A becomes wide in the Ya direction of the flow path member 200, and the flow path member 200 is small in the Ya direction. Cannot be achieved. In other words, as shown in FIG. 17 (a), since the COF substrate 98 is inclined toward the first surface 98a, the second vertical flow path 272a is provided by the width U1 or the width U2 while maintaining the interval V. It can be brought closer to the COF substrate 98 side. That is, the channel member 200 can be downsized in the Ya direction.

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

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

  Note that the width of the vertical channel 270 in the Ya direction may be smaller than the width of the branch channel 260 in the Ya direction. In that case, the degree of freedom of arrangement of the vertical flow path 270 and the branch flow path 260 can be further increased while maintaining the distance V from the opening 201 compared to the case where this is not the case. In addition, the cross-sectional area of the vertical channel 270 may be smaller than the cross-sectional area of the branch channel 260. In that case, the flow velocity in the vertical flow path 270 can be increased, and the bubbles in the vertical flow path 270 can be efficiently discharged.

  Here, it is 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 body 110 in the Z direction, the width of the region Q in the Ya direction becomes wider and the width of the region P in the Ya direction becomes narrower. In particular, assuming that the COF substrate 98 is arranged close to the side surface on the Ya2 side of the connection port 43, the width of the region P in the Ya direction is set to be constant from the COF substrate 98 in the Ya direction. Narrower. Therefore, when the side where the COF substrate 98 is close to 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 of disposing the second flow path 242 in the region P is low, and the disposition of the second flow path 242 becomes very difficult. However, in the present embodiment, by forming the second branch flow path 262 in the region Q, the degree of freedom in arrangement of the second branch flow path 262 is increased, and the flow path member 200 is downsized in the Ya direction. . In addition, the side where the COF substrate 98 is close to the side surface of the connection port 43 in the Ya direction (for example, the Ya1 side) and the side where the COF substrate 98 is inclined in the Ya direction (for example, the Ya2 side) are not matched. The degree of freedom of arrangement of the branch flow path 260 on the side where the COF substrate 98 is close to the side surface of the connection port 43 in the Ya direction is increased, and the size of the flow path member 200 in the Ya direction is reduced.

  On the other hand, it is assumed that the first flow path 241 is formed in the region Q. In this case, the flow path member 200 forms the first flow path 241 on the side closer to the head body 110 in the Z direction, although the width in the Ya direction of the region Q becomes wider as the distance from the head body 110 in the Z direction. Therefore, the region Q widened in the Ya direction cannot be fully utilized. In particular, as in the present embodiment, in order to reduce the shape of the liquid ejection surface 20a in the surface direction, the first cross flow channel 251a and the second cross flow channel 252a, the first cross flow channel 251b, and the second cross flow are used. Assuming that the flow path 252b is arranged in the Z direction by changing the position in the Z direction, when both the first branch flow path 261 and the second branch flow path 262 are formed in the region Q, Compared with the case where the two-branch channel 262 is formed in the region Q and the first branch channel 261 is formed in the region P, the degree of freedom is not high. However, in this embodiment, by forming the first branch channel 261 in the region P, the degree of freedom of arrangement of the first branch channel 261 is increased, and the channel member 200 is downsized in the Ya direction. . Further, by not overlapping the first branch flow path 261 and the second branch flow path 262 in the Z direction with respect to the first cross flow path 251 and the second cross flow path 252 arranged in the Z direction. The degree of freedom of arrangement of the first branch channel 261 and the second branch channel 262 is increased, and the channel member 200 is downsized in the Ya direction.

  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 portion 98d is narrower than the width in the surface direction of the lower end portion 98c (see FIG. 16). An opening 201 is formed in accordance with the COF substrate 98. Therefore, the area W where the second flow path 242 can be formed is formed in the flow path member 200 on both outer sides of the second opening 216 in the surface direction because the upper end 98d of the COF substrate 98 is narrowed in the plane direction. Has been.

  In the present embodiment, the second cross channel 252 and the second branch channel 262 of the second channel 242 are formed in the first channel member 210 and the second channel member 220. Accordingly, in the first flow path member 210 and the second flow path member 220, the outer portions of the openings 215 and 225 in the Xa direction are regions W (see FIG. 16). In the present embodiment, the first intersecting channel 251 and the second intersecting channel 252 are arranged so as 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 respectively projected onto the liquid ejection surface 20a in the Z direction, the images do not have to completely match each other. The arrangement may be such that part of them overlaps, and further, at least part of the image of the second cross flow channel 252 is an image of the first cross flow channel 251 in the X direction rather than the image of the first cross flow channel 251. May be inside. That is, the second intersecting flow path 252a of the second flow path 242a may be formed so as to pass through the region W. In addition, you may form not only the 2nd cross flow path 252a but the 2nd cross flow path 252b and the 2nd branch flow path 262 so that the area | region W may be passed. 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 portion 98c that is one end portion 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 path 252 and the second branch flow path 262 are provided.

  As described above, the COF substrate 98 whose upper end portion 98d is narrower than the lower end portion 98c is formed, and the opening 201 is provided in accordance with the COF substrate 98, whereby the second flow is formed outside the COF substrate 98 in the Xa direction. A region W for forming the path 242a can be provided. The same applies to the second flow path 242b. Thereby, the freedom degree which arrange | positions the 2nd flow path 242 in the flow path member 200 further improves.

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

  Here, there is a possibility that the drive circuit 97 contacts 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 Ya direction 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 accommodated in the second opening 225 of the second flow path member 220 and the third opening 235 of the third flow path member 230 in the Z direction. The first flow path member 210 is not disposed at a position where it is accommodated in the first opening 215. Thereby, in the Ya direction, the width of the first opening 215 can be made smaller than the width of the second opening 225 and the width of the third opening 235. That is, a region for forming the second flow path 242 can be provided outside the COF substrate 98 in the Ya direction. Thereby, the freedom degree which arrange | positions the 2nd flow path 242 in the flow path member 200 further improves.

  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 Ya direction cannot be reduced. For this reason, the degree of freedom of disposing the second flow path 242 in the flow path member 200 cannot be improved.

  On the other hand, in the recording head 100 according to the present embodiment, the drive circuit 97 is arranged at a position accommodated in the second opening 225 and the third opening 235 in the Z direction, and the Ya direction of the first opening 215 is arranged. By reducing the width, the degree of freedom of arranging the second flow path 242 such as the second cross 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 body 110 in the dense region P will be described. In the dense region P, the first branch flow path 261 provided in a plane parallel to the liquid ejection surface 20a is located. “The first flow path 241 is connected to the head main 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-described area P and the head main body 110. It is connected to the introduction path 44. In addition, the 1st branch flow path 261 of this embodiment is corresponded to the flow path provided along the liquid ejection surface in the 1st surface side of this invention.

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

  Thereby, 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 by the width.

<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, each head body 110 of the recording head 100 according to the first embodiment has the nozzle row a and the nozzle row b along the Xa direction, and the nozzle row a and the nozzle row b are inclined with respect to the X direction that is the transport direction. In this case, as described above, the X direction and the Xa direction may be crossed at an angle greater than 0 degree and less than 90 degrees. Alternatively, the recording head including the head body 110 may be configured such that the Xa direction that is the direction of the nozzle row is perpendicular to the X direction that 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. However, in the recording head 100 in which the Ya direction matches the X direction, the X direction corresponding to the Ya direction, that is, the recording sheet S The size can be reduced in the conveying 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 respectively located at different positions in the Z direction. Although it had, it is not limited to such an aspect. For example, the recording head provided with the flow path member provided only on the same plane may be used as the flow path parallel to the liquid ejection surface 20a. For example, in the embodiment described above, 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 may be used. As described above, if the recording head does not include either the first flow path 241 or the second flow path 242, the recording head 100 can be reduced in size in the Z direction.

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

  Further, 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 each other 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 modeled by an additive manufacturing method that enables three-dimensional molding. Alternatively, the individual flow path members may be formed by three-dimensional molding, die molding (injection molding, etc.), cutting, or pressing.

  In addition, the flow path member 200 has two first flow paths 241a and 241b as the first flow paths 241, but the number is not limited to two, but one or three or more. May be. The same applies to the second flow path 242.

  The first cross channel 251a is branched into six first branch channels 261a, but is not limited to this, and may be connected to one head body 110 without branching, and the number of branches may be six. It is not limited to one and may be branched into two or more. The same applies to the first cross channel 251b, the second cross channel 252a, and the second cross channel 252b. Further, the number of the COF substrates 98 inclined toward the first surface 98a is not limited to six, and only some of the COF substrates 98 may be inclined.

  Moreover, although the 1st cross flow path 251a was made into the flow path which distribute | circulates ink horizontally between the 2nd flow path member 220 and the 3rd flow path member 230, it is not limited to such an aspect. That is, the channel may be inclined with respect to the Z plane. The same applies to the first cross channel 251b, the second cross channel 252a, and the second cross channel 252b.

  Further, although the first vertical flow path 271a is formed perpendicular to the liquid ejection surface 20a, the present invention is not limited to such a mode. That is, you may incline with respect to the liquid ejection surface 20a. The same applies to the first vertical channel 271b, the second vertical channel 272a, and the second vertical 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 opening may be such that the width of the second opening 216 and the first opening 236 in the Xa direction are substantially equal and the rectangular COF substrate 98 is accommodated. Conversely, the second opening 216 may be wider in the Xa direction than the first opening 236.

  Further, although the COF substrate 98 is provided as a flexible wiring substrate, a flexible printed circuit board (FPC) may be used. Even if the COF substrate 98 is not arranged close to the side surface of the connection port 43 on the Ya1 side, the COF substrate 98 and the lead electrode 90 need only be electrically connected.

  In Embodiment 1, the holding member 120 and the flow path member 200 are fixed with an adhesive or the like, but may be integrated. That is, the holding part 121 and the foot part 122 may be provided on the Z1 side of the flow path member 200. Thereby, the holding member 120 can be reduced in size in the Z direction by the amount not stacked in the Z direction. Further, since the holding member 121 is provided in the flow path member 200, the flow path member 200 only needs to accommodate the plurality of head main bodies 110 and does not need to accommodate the relay substrate 140. Therefore, the size can be reduced in the XY directions. . Furthermore, the number of parts can be reduced by integrating a plurality of members. In the case where the flow path member 200 is constituted 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 main body 110 is provided in the Y direction, and the recording head 100 is configured by the plurality of head main bodies 110. However, the recording head 100 may be configured by one head main 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 100 may be mounted, or one recording head 100 may be mounted on the ink jet recording apparatus 1 as a single unit. Also good.

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

  Furthermore, the present invention is intended for a wide range of liquid ejecting head units in general, for example, manufacturing 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 material ejecting head units equipped with color material ejecting heads, organic EL displays, electrode material ejecting heads used for forming electrodes such as FEDs (field emission displays), bio-organic matter ejecting heads used for biochip manufacturing, etc. Can be applied.

  Further, the wiring board of the present invention is not limited to the case where it is used for a liquid ejecting head, and can be applied to an arbitrary electronic circuit or the like.

  DESCRIPTION OF SYMBOLS 1 Inkjet recording apparatus (liquid ejecting apparatus), 43 connection port, 44a, 44b, 44c, 44d Introducing path, 97 drive circuit, 98 COF board | substrate, 98a 1st surface, 98b 2nd surface, 98c Lower end part, 98d Upper end, 100 recording head, 101 head unit, 110 head main body, 140 relay substrate, 200 flow path member, 201 opening, 210 first flow path member, 216 second opening, 220 second flow path member, 230 first 3 flow path member, 236 1st opening, 240 flow path, 241 1st flow path, 242 2nd flow path, 251 1st cross flow path, 252 2nd cross flow path, 261 1st branch flow path, 262 2nd 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

An aspect of the present invention that solves the above-described problem is a liquid ejecting head that includes a plurality of substrates stacked in a first direction. The liquid ejecting head is in communication with a plurality of pressure generating chambers and a plurality of pressure generating chambers. A plurality of manifolds whose longitudinal direction is a second direction perpendicular to one direction, a plurality of branch flow paths along the second direction, a plurality of the manifolds and a plurality of the branch flow paths are respectively connected; A plurality of through-holes penetrating in the first direction, and a flow path connected to the plurality of branch flow paths and having a third direction as a longitudinal direction perpendicular to the first direction. The direction intersects the second direction at an angle greater than 0 degrees and smaller than 90 degrees when viewed from the first direction, and the plurality of manifolds are arranged in the third direction, The branch flow path is arranged in the third direction. A liquid-jet head according to.
An aspect of the present invention that solves the above problems includes a plurality of head bodies having a liquid ejecting 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 path, wherein the flow path member has a plurality of openings through which the flexible wiring board is inserted, and the flexible wiring board is located on the flow path member side with respect to the head body. It is extended and inclined between the head body and the flow path member toward the first surface side of both surfaces of the flexible wiring board, and the flow path is the second of both surfaces of the flexible wiring board. On the surface side, the head body has a portion provided along the liquid ejection surface, and the head body is connected to a first flow path and a second flow path, and the first flow path is connected to the first flow path. On the first side, The first flow path is provided along the liquid ejection surface, and the second flow path has a second flow path provided along the liquid ejection surface on the second surface side. In the liquid ejecting head, the first branch channel is closer to the head body in a direction perpendicular to the liquid ejecting surface than the second branch channel.
In such an aspect, by inclining the flexible wiring board to the first surface side, the opening of the flow path member can also be moved to the first surface side, so that the flow path of the flow path member can be densely formed in the region that can be formed. Can be provided. A dense region on the first surface side than the opening of the flow path member is P, and a sparse region on the second surface side is Q. Thus, since the flow path can be arranged in a wider area Q, it is easy to configure an optimal flow path according to the arrangement of the head body. In particular, when providing a flow path along the liquid ejection surface, it is possible to prevent the flow path from interfering with the flexible wiring board. Further, in order to prevent interference with the flexible wiring board, the width of the liquid ejecting head in the direction is reduced compared with the case where the flow path member along the liquid ejecting surface is moved to the second surface side to widen the flow path member. Can be
Furthermore, in the region Q, the second branch channel can be formed in the channel member with a higher degree of freedom as compared to the case where the first branch channel close to the head body is provided in the direction perpendicular to the liquid ejection surface. . In addition, since the plurality of flow paths can be arranged in a direction perpendicular to the liquid ejecting surface, the shape of the liquid ejecting head in the liquid ejecting surface can be reduced in size.
Here, the first flow path has a first vertical flow path that connects the first branch flow path and the head main body along the direction perpendicular to the liquid ejection surface on the first surface side. The second flow path preferably has a second vertical flow path that connects the second branch flow path and the head main body along the direction perpendicular to the liquid ejection surface on the second surface side. . According to this, the range of the 1st vertical flow path and the 2nd vertical flow path which occupies the flow path member in the planar view seen from the direction perpendicular to the liquid ejection surface is the first branch flow path and the second branch flow path. It is smaller than the range occupied by the flow paths connecting the head main body at an angle. That is, by connecting the first branch channel and the second branch channel and the head body with the first vertical channel and the second vertical channel, respectively, the size of the channel member in the plan view is reduced. It becomes possible.
A plurality of head bodies having a liquid ejection surface from which liquid is ejected; a flexible wiring board connected to each head body; and a channel member provided with a channel for supplying liquid to each head body The flow path member has a plurality of openings through which the flexible wiring board is inserted, and the flexible wiring board extends to the flow path member side with respect to the head main body, and the head main body And the flow path member are inclined toward the first surface side of both surfaces of the flexible wiring substrate, and the flow channel is formed on the liquid ejection surface on the second surface side of the both surfaces of the flexible wiring substrate. A first flow path and a second flow path are connected to the head main body, and the first flow path is on the first surface side of the flexible wiring board. ,Previous A first branch channel provided in a direction parallel to the liquid ejection surface; and a first intersecting channel connected to the plurality of first branch channels, wherein the second channel is the flexible channel On the second surface side of the wiring board, there are a second branch channel provided in a direction parallel to the liquid ejection surface, and a second cross channel connected to the plurality of second branch channels. And it is preferable that the said 1st intersection flow path and the said 2nd intersection flow path exist on the opposite side with respect to the said flexible wiring board in the surface direction of the said flexible wiring board. According to this, compared with the case where the branch channel is provided in the region P, the branch channel can be formed in the channel member with a higher degree of freedom. Further, since the intersecting flow paths are on the opposite sides of the flexible wiring board in the plane direction of the flexible wiring board, the plurality of flow paths can be arranged without being overlapped in the direction perpendicular to the liquid ejection surface, The shape of the liquid ejecting head in the direction orthogonal to the liquid ejecting surface can be reduced.
Further, the flexible wiring board has one end near the head main body in the direction perpendicular to the liquid ejecting surface and the other end far from the head main body, and the other end is more than the one end. It is preferable that a width of the flexible wiring board is narrow in the surface direction, and the second flow path is formed in the flow path member so as to pass a region outside the surface direction of the other end. According to this, the area | region which forms a 2nd flow path can be provided in the outer side of a flexible wiring board in the surface direction (direction parallel to a surface) of a flexible wiring board. Thereby, the freedom degree which arrange | positions a 2nd flow path in a flow path member further improves.
Further, it is preferable that a drive circuit is provided on the second surface side of the flexible wiring board. According to this, it can suppress more effectively that a drive circuit contacts the inner surface of an opening part by expanding the width | variety of an opening part to the 1st surface side, and can protect a drive circuit. And even if the width of the opening is widened to the first surface side, only the above-described dense region P side is further narrowed, and it is possible to avoid the sparse region Q side from becoming narrow.
According to another aspect of the invention, there is provided a liquid ejecting apparatus including the liquid ejecting head.
In this aspect, there is provided a liquid ejecting apparatus including a flow path member that can be downsized and can secure a larger region where the liquid flow path can be disposed.
According to another aspect of the present invention for solving the above-described problems, a plurality of head main bodies each having a liquid ejecting surface on which liquid is ejected, a flexible wiring substrate connected to each head main body, and a liquid supplied to each head main body And a flow path member provided with a flow path, wherein the flow path member has a plurality of openings through which the flexible wiring board is inserted, and the flexible wiring board is connected to the head body with the flow path member. Extending between the head body and the flow path member, and is inclined to the first surface side of both surfaces of the flexible wiring board, and the flow path is formed on both surfaces of the flexible wiring board. The liquid ejecting head includes a portion provided along the liquid ejecting surface on the second surface side.
In such an aspect, by inclining the flexible wiring board to the first surface side, the opening of the flow path member can also be moved to the first surface side, so that the flow path of the flow path member can be densely formed in the region that can be formed. Can be provided. A dense region on the first surface side than the opening of the flow path member is P, and a sparse region on the second surface side is Q. Thus, since the flow path can be arranged in a wider area Q, it is easy to configure an optimal flow path according to the arrangement of the head body. In particular, when providing a flow path along the liquid ejection surface, it is possible to prevent the flow path from interfering with the flexible wiring board. Further, in order to prevent interference with the flexible wiring board, the width of the liquid ejecting head in the direction is reduced compared with the case where the flow path member along the liquid ejecting surface is moved to the second surface side to widen the flow path member. Can be

Claims (6)

A plurality of head bodies having a liquid ejection surface from which liquid is ejected;
A flexible wiring board connected to each head body;
A flow path member provided with a flow path for supplying a liquid for each head body,
The flow path member has a plurality of openings through which the flexible wiring board is inserted,
The flexible wiring board extends to the flow path member side with respect to the head main body, and on the first surface side of both surfaces of the flexible wiring board between the head main body and the flow path member. 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 board,
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,
The liquid ejecting head, wherein the first branch channel is closer to the head body in a direction perpendicular to the liquid ejecting surface than the second branch channel. The liquid ejecting head according to claim 1,
The first flow path has, on the first surface side, a first vertical flow path that connects the first branch flow path and the head body and extends in a direction perpendicular to the liquid ejection surface,
The second flow path has, on the second surface side, a second vertical flow path that connects the second branch flow path and the head body and extends along a direction perpendicular to the liquid ejection surface. Liquid ejecting head. A plurality of head bodies having a liquid ejection surface from which liquid is ejected;
A flexible wiring board connected to each head body;
A flow path member provided with a flow path for supplying a liquid for each head body,
The flow path member has a plurality of openings through which the flexible wiring board is inserted,
The flexible wiring board extends to the flow path member side with respect to the head main body, and on the first surface side of both surfaces of the flexible wiring board between the head main body and the flow path member. 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 board,
A first flow path and a second flow path are connected to the head body,
The first flow path is
A first branch channel provided in a direction parallel to the liquid ejection surface on the first surface side of the flexible wiring board;
A first intersecting flow path connected to a plurality of the first branch flow paths,
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 flow path connected to a plurality of the second branch flow paths,
The liquid ejecting head according to claim 1, wherein the first intersecting flow path and the second intersecting flow path are on opposite sides of the flexible wiring board in a surface direction of the flexible wiring board. In the liquid jet head according to any one of claims 1 to 3,
The flexible wiring board has one end close to the head main body in the direction perpendicular to the liquid ejecting surface, and the other end far from the head main body,
The other end portion is formed to have a narrower width in the surface direction of the flexible wiring board than the one end portion,
The liquid jet head, wherein the second flow path is formed in the flow path member so as to pass through a region outside the surface direction of the other end. In the liquid jet head according to any one of claims 1 to 4,
A drive circuit is provided on the second surface side of the flexible wiring board.   A liquid ejecting apparatus comprising the liquid ejecting head according to claim 1.

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