JP6741055B2 - Liquid jet head - Google Patents

Description

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

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

The head main body is connected to the 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. Further, 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 the lead electrode. Furthermore, the flexible wiring board is connected to a connection board arranged on the side of the flow path member opposite to the head body. The connection board is connected to the control section, and the control signal of the control section is transmitted to the pressure generating means via the connection board and the flexible wiring board (for example, see Patent Document 1).

JP2012-81644A

On the other hand, the liquid jet head is required to have a high resolution and a small size, and the flow path member is also required to have a small size particularly in a horizontal plane parallel to the liquid jet surface.

However, due to the miniaturization of the flow path member, the area in which 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 the ink flows in the horizontal plane. Further, if the region of the flow channel member in which the flow channel can be formed is narrow, the degree of freedom for routing the flow channel is limited, so that it is difficult to configure an optimal flow channel according to the arrangement of the head body, for example. Become.

Note that such a problem similarly 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 ejects a liquid other than ink.

In view of such circumstances, the present invention provides a liquid ejecting head and a liquid ejecting apparatus that include a flow channel member that can be downsized and that can secure a larger area in which a liquid flow channel can be arranged. With the goal.

An aspect of the present invention that solves the above-mentioned problems is a liquid jet head configured of a plurality of substrates stacked in a first direction, the plurality of pressure generating chambers being in communication with the plurality of pressure generating chambers. A plurality of manifolds having a second direction perpendicular to one direction as a longitudinal direction, a plurality of branch flow channels along the second direction, a plurality of the manifolds and a plurality of the branch flow channels, respectively, A plurality of through holes penetrating in the first direction, and a flow path that is connected to the plurality of branch flow paths and has a third direction perpendicular to the first direction as a longitudinal direction, The direction intersects with the second direction at an angle larger than 0 degree and smaller than 90 degrees when viewed from the first direction, the plurality of manifolds are arranged in the third direction, and the plurality of manifolds are arranged. The branched flow paths are arranged in the third direction in the liquid jet head.
An aspect of the present invention that solves the above problems is to provide a plurality of head main bodies having a liquid ejection surface on which liquid is ejected, a flexible wiring board connected to each head main body, and a flow for supplying a liquid to each head main body. A flow path member provided with a path, the flow path member has a plurality of openings through which the flexible wiring board is inserted, and the flexible wiring board is provided on the flow path member side with respect to the head body. The extension is provided and is 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 provided on the second side of both surfaces of the flexible wiring board. On the surface side, there is a portion provided along the liquid ejecting surface, and a first flow path and a second flow path are connected to the head main body, and the first flow path is the first flow path. The first surface has a first branch flow path provided along the liquid ejection surface, and the second flow path has a second flow path provided on the second surface side along the liquid ejection surface. A liquid jet head having a branch flow channel, wherein the first branch flow channel is closer to the head main body than the second branch flow channel in a direction orthogonal to the liquid jet surface.
In such an aspect, by tilting 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, and the area of the flow path member in which the flow path can be formed is sparse and dense. Can be provided. A dense area on the first surface side of the opening of the flow path member is P, and a sparse area on the second surface side is Q. In this way, since the flow passage can be arranged in a wider area Q, it becomes easy to configure an optimum flow passage according to the arrangement of the head body. In particular, when the flow path is provided along the liquid ejection surface, it is possible to prevent the flow path from interfering with the flexible wiring board. In addition, in order to prevent interference with the flexible wiring board, the width of the liquid ejecting head in the above direction can be reduced as compared with the case where the flow passage member along the liquid ejecting surface is moved to the second surface side to widen the flow passage member. Can be converted.
Further, in the region Q, the second branch flow channel can be formed in the flow channel member with a higher degree of freedom than in the case where the first branch flow channel near 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 an overlapping manner in the direction orthogonal to the liquid ejecting surface, the shape of the liquid ejecting head in the liquid ejecting surface can be downsized.
Here, 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 along a direction perpendicular to the liquid ejection surface. It is preferable that the second flow path has a second vertical flow path on the second surface side, which connects the second branch flow path and the head main body and extends along a direction perpendicular to the liquid ejection surface. .. According to this, the range of the first vertical flow path and the second vertical flow path occupying the flow path member in the plan view viewed 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 body and the head body at an angle. That is, the size of the flow path member in the plan view is reduced by connecting the first branch flow path and the second branch flow path to the head main body by the first vertical flow path and the second vertical flow path, respectively. It becomes possible.
Further, a plurality of head main bodies having a liquid ejecting surface on which liquid is ejected, a flexible wiring board connected to each of the head main bodies, and a flow channel member provided with a flow channel for supplying liquid to each of the head main bodies. The flow path member has a plurality of openings for inserting the flexible wiring board, the flexible wiring board is extended to the flow path member side with respect to the head body, and the head body Between the flow path member and the flow path member, the flow path is inclined to the first surface side of the both surfaces of the flexible wiring board, and the flow path is formed on the liquid ejection surface on the second surface side of the both surfaces of the flexible wiring board. A first flow path and a second flow path are connected to the head body, and the first flow path is provided on the first surface side of the flexible wiring board. A first branch flow channel provided in a direction parallel to the liquid ejection surface, and a first cross flow channel connected to the plurality of first branch flow channels, wherein the second flow channel is A second branch channel provided in a direction parallel to the liquid ejecting surface on the second surface side of the flexible wiring board; and a second intersecting channel connected to the plurality of second branch channels. It is preferable that the first crossing channel and the second crossing channel are on opposite sides of the flexible wiring board in the plane direction of the flexible wiring board. According to this, compared with the case where the branch flow path is provided in the region P, the branch flow path can be formed in the flow path 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, it is possible to arrange the plurality of flow paths without overlapping in the direction orthogonal to the liquid ejecting surface, It is possible to reduce the size of the liquid ejecting head in the direction orthogonal to the liquid ejecting surface.
Further, the flexible wiring board has one end near the head body in a direction perpendicular to the liquid ejecting surface and another end far from the head body, and the other end is more than the one end. It is preferable that the width of the flexible wiring board in the surface direction is narrow, and the second flow path is formed in the flow path member so as to pass through a region outside the other end of the flexible wiring board in the surface direction. According to this, the region for forming the second flow path can be provided outside the flexible wiring board in the surface direction (direction parallel to the surface) of the flexible wiring board. This further improves the degree of freedom in arranging the second flow path in the flow path member.
Further, it is preferable that a drive circuit is provided on the second surface side of the flexible wiring board. According to this, by increasing the width of the opening to the first surface side, it is possible to more effectively prevent the drive circuit from coming into contact with the inner surface of the opening, and it is possible to protect the drive circuit. Further, even if the width of the opening is increased to the first surface side, the dense region P side is only further narrowed, and the sparse region Q side is not narrowed.
Another aspect of the present invention is a liquid ejecting apparatus including the liquid ejecting head.
In this aspect, a liquid ejecting apparatus is provided that includes a flow path member that can be downsized and can secure a larger area in which the liquid flow path can be arranged.
Another aspect of the present invention for solving the above-mentioned problems is to supply a liquid to each of the head main bodies having a plurality of head main bodies having a liquid ejection surface on which liquid is ejected, a flexible wiring board connected to each of the head main bodies, and the head main bodies. 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 the flow path member with respect to the head body. Of the flexible wiring board between the head body and the flow path member, the flow path is inclined to the first surface side of the both surfaces of the flexible wiring board. The liquid ejecting head has a portion provided along the liquid ejecting surface on the second surface side.
In such an aspect, by tilting 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, and the area of the flow path member in which the flow path can be formed is sparse and dense. Can be provided. A dense area on the first surface side of the opening of the flow path member is P, and a sparse area on the second surface side is Q. In this way, since the flow passage can be arranged in a wider area Q, it becomes easy to configure an optimum flow passage according to the arrangement of the head body. In particular, when the flow path is provided along the liquid ejection surface, it is possible to prevent the flow path from interfering with the flexible wiring board. In addition, in order to prevent interference with the flexible wiring board, the width of the liquid ejecting head in the above direction can be reduced as compared with the case where the flow passage member along the liquid ejecting surface is moved to the second surface side to widen the flow passage member. Can be converted.

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 ejecting surface. 1 branch flow channel, the 2nd flow channel has the 2nd branch flow channel provided along the above-mentioned liquid jetting side in the 2nd surface side, and the 1st branch flow channel is the above-mentioned. It is preferable that the head main body is closer to the liquid ejection surface than the second branch flow path. According to this, in the region Q, the second branch flow channel is formed in the flow channel member with a higher degree of freedom than in the case where the first branch flow channel near 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 an overlapping manner in the direction orthogonal to the liquid ejecting surface, the shape of the liquid ejecting head in the liquid ejecting surface can be downsized.

Further, 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 along a direction perpendicular to the liquid ejection surface, It is preferable that the second flow path has a second vertical flow path on the second surface side, which connects the second branch flow path and the head main body and extends along a direction perpendicular to the liquid ejection surface. According to this, the range of the first vertical flow path and the second vertical flow path occupying the flow path member in the plan view viewed 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 body and the head body at an angle. That is, the size of the flow path member in the plan view is reduced by connecting the first branch flow path and the second branch flow path to the head main body by the first vertical flow path and the second vertical flow path, respectively. It becomes possible.

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 first cross flow path connected to the plurality of first branch flow paths, wherein the second flow path is the second of the flexible wiring board. On the surface side, there is provided a second branch flow channel provided in a direction parallel to the liquid ejection surface, and a second cross flow channel connected to the plurality of second branch flow channels. It is preferable that the flow path and the second intersecting flow path are on opposite sides to the flexible wiring board in the surface direction of the flexible wiring board. According to this, compared with the case where the branch flow path is provided in the region P, the branch flow path can be formed in the flow path 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, it is possible to arrange the plurality of flow paths without overlapping in the direction orthogonal to the liquid ejecting surface, It is possible to reduce the size of the liquid ejecting head in the direction orthogonal to the liquid ejecting surface.

Further, the flexible wiring board has one end near the head body in a direction perpendicular to the liquid ejecting surface and another end far from the head body, and the other end is more than the one end. It is preferable that the width of the flexible wiring board in the surface direction is narrow, and the second flow path is formed in the flow path member so as to pass through a region outside the other end of the flexible wiring board in the surface direction. According to this, the region for forming the second flow path can be provided outside the flexible wiring board in the surface direction (direction parallel to the surface) of the flexible wiring board. This further improves the degree of freedom in arranging the second flow path in the flow path member.

Further, it is preferable that a drive circuit is provided on the second surface side of the flexible wiring board. According to this, by increasing the width of the opening to the first surface side, it is possible to more effectively prevent the drive circuit from coming into contact with the inner surface of the opening, and it is possible to protect the drive circuit. Further, even if the width of the opening is increased to the first surface side, the dense region P side is only further narrowed, and the sparse region Q side is not narrowed.

Another aspect of the present invention is a liquid ejecting apparatus including the liquid ejecting head.
In this aspect, a liquid ejecting apparatus is provided that includes a flow path member that can be downsized and can secure a larger area in which the liquid flow path can be arranged.

1 is a schematic perspective view of a recording apparatus according to a first embodiment of the invention. FIG. 3 is an exploded perspective view of the head unit according to the first embodiment of the present invention. FIG. 3 is a bottom view of the head unit according to the first embodiment of the present 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 the arrangement|positioning of the nozzle opening of Embodiment 1 of this invention. FIG. 3 is a plan view of the flow path member (first flow path member) according to the first embodiment of the present invention. FIG. 3 is a plan view of the second flow path member according to the first embodiment of the present invention. FIG. 3 is a plan view of a third flow path member according to the first embodiment of the present invention. The bottom view of the 3rd flow path member which concerns on Embodiment 1 of this invention. FIG. 14 is a sectional view taken along line B-B′ of FIGS. 11 to 13. FIG. 14 is a cross-sectional view taken along the line C-C′ of FIGS. 11 to 13. FIG. 14 is a sectional view taken along the line D-D′ of FIGS. 11 to 13. 11 is a sectional view taken along line E-E′ of FIG. 11 to FIG. 13 and a sectional view of a conventional head body. 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 the embodiments. The inkjet recording head is an example of a liquid ejecting head, and is also simply referred to as a recording head. The inkjet recording head unit is an example of a liquid ejecting head unit, and is also simply referred to as a head unit. The ink jet recording apparatus is an example of a liquid ejecting apparatus. FIG. 1 is a perspective view showing a schematic configuration of an ink jet recording apparatus according to this embodiment.

As shown in FIG. 1, the inkjet recording apparatus 1 is a so-called line recording apparatus that includes a head unit 101 and prints by conveying a recording sheet S such as paper as an ejection medium.

Specifically, the inkjet 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 ejecting surface where the nozzle openings of the head unit 101 are provided, the direction orthogonal to the X direction is the Y direction. Furthermore, the direction orthogonal to the X and Y directions is the Z direction. Further, in the X direction, the upstream side that conveys 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 (recording sheet S The side) is the Z1 side, and the opposite side is the Z2 side.

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

The plurality of recording heads 100 are arranged in parallel in the Y direction, which is a direction that intersects 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. That is, the plurality of recording heads 100 are not displaced in the X direction. As a result, the width of the head unit 101 in the X direction can be narrowed and the head unit 101 can be 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 of the head unit 101 in the X direction, which is the transport direction of the recording sheet S. The recording sheet S is transported in the X direction by the first transport roller 5 and the second transport roller 6 as described above. The transporting means 4 that transports the recording sheet S is not limited to a transport roller, and may be a belt, a drum, or the like.

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

The support member 7 may be provided with suction means for sucking the conveyed recording sheet S on the support member 7. Examples of the suction means include a suction means for sucking the recording sheet S by suction and a suction means for electrostatically sucking the recording sheet S by electrostatic force. Further, for example, when the transporting means 4 is a belt or a drum, the supporting 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 recording head 100 of the head unit 101 is connected to a liquid storage unit such as an ink tank or an ink cartridge in which ink is stored so that the ink can be supplied. The liquid storage means may be held, for example, on the head unit 101, or may be held at a position different from the head unit 101 in the apparatus main body 2. In addition, a flow path or the like for supplying the ink supplied from the liquid storage unit to the recording head 100 may be provided inside the head fixed substrate 102, and an ink flow path member may be provided on the head fixed substrate 102. Ink from the liquid storage means may be supplied to the recording head 100 via the flow path member. Of course, the ink may be directly supplied from the liquid storage means to the recording head 100 without using the head fixed substrate 102 or the ink flow path member fixed to the head fixed substrate 102.

In such an inkjet recording apparatus 1, the recording sheet S is conveyed in the X direction by the first conveying roller 5, and printing is performed on the recording sheet S supported on the supporting member 7 by the head unit 101. The printed recording sheet S is transported in the X direction by the second transport roller 6.

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

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 the nozzle openings 21 on the Z1 side in the Z direction. Each recording head 100 is fixed to the surface side of the head fixing substrate 102 facing the recording sheet S, that is, the Z1 side which is the recording sheet S side in the Z direction.

As described above, the plurality of recording heads 100 are arranged in a straight line in the Y direction orthogonal to the X direction, which is the transport direction, and fixed to the head fixing substrate 102. That is, the plurality of recording heads 100 are not displaced in the X direction. As a result, the width of the head unit 101 in the X direction can be narrowed and the head unit 101 can be downsized. Of course, the recording heads 100 juxtaposed in the Y direction may be arranged so as to be displaced in the X direction, but when the recording heads 100 are largely displaced in the X direction, the width of the head fixing substrate 102 and the like in the X direction becomes wider. turn into. When the size of the head unit 101 in the X direction increases in this way, the distance between the first transport roller 5 and the second transport roller 6 in the inkjet recording apparatus 1 in the X direction increases, and the posture of the recording sheet S increases. Becomes difficult to fix. In addition, 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, but the number of the recording heads 100 is not particularly limited as long as it 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 sectional view taken along the line A-A′ of FIG. 4 is a plan view of the recording head 100 on the Z2 side in the Z direction, and the holding member 120 is not shown.

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

The head body 110 is supplied with ink from a holding member 120 provided with an ink flow path and a flow path member 200, and a relay board 140 and a COF board from a control unit (not shown) provided in the inkjet 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 sides of the plurality of head main bodies 110 are adhered 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 to be supplied to the head body 110. Although a detailed configuration of the flow path member 200 will be described later, a plurality of head main bodies 110 are arranged in parallel in the Y direction and bonded to the surface on the Z1 side of the flow path member 200. In addition, the liquid flow path provided in the flow path member 200 communicates with the liquid flow path of each head main body 110, and ink is supplied from the flow path member 200 to each head main body 110.

In this embodiment, six head bodies 110 are bonded to one flow path member 200. Of course, the number of head main bodies 110 fixed to one flow path member 200 is not limited to the above-described number, and even if there is one head main body 110 for one flow path member 200, or two or more. May be plural.

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

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

The relay board 140 is a board on the surface of which electrical components such as wiring, IC, and resistors are mounted, and is arranged between the holding member 120 and the flow path member 200. The relay substrate 140 is formed with a penetrating portion 141 that communicates with the opening 201 provided in the flow path member 200. The opening shape of each penetration portion 141 is formed larger than the opening portion 201 of the flow path member 200.

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

Although not particularly shown, the relay board 140 is connected to the control unit of the inkjet recording apparatus 1. Therefore, the drive signal sent from the control unit is transmitted to the drive circuit 97 of the COF substrate 98 through the relay substrate 140, and the drive circuit 97 drives the pressure generating means of the head body 110. As a result, the ink ejection operation of the recording head 100 is controlled.

The holding member 120 has a holding portion 121 that forms a groove-shaped space on the Z1 side. The holding portion 121 is continuously provided on the surface of the holding member 120 on the Z1 side in the Y direction, and is provided with openings on both side surfaces in the Y direction. Further, the holding member 120 is provided with the holding portions 121 at substantially the central portion in the X direction, so that the foot portions 122 are formed on both sides of the holding portion 121 in the X direction. That is, the foot portions 122 are provided only on both end portions in the X direction on the surface of the holding member 120 on the Z1 side, and are not provided on both end portions in the Y direction. In addition, although the holding member 120 is made of one member in the present embodiment, the holding member 120 is not limited to such an aspect and may be formed by stacking a plurality of members in the Z direction.

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

The holding member 120 and the flow path member 200 are bonded to each other by adhesives on the surfaces of the holding portion 121 and the flow path member 200 that face each other in the Z direction. The relay substrate 140 is housed in the space sandwiched between the holding portion 121 and the flow path member 200. Note that the holding member 120 and the flow path member 200 may be integrated with each other by a fixing means such as a screw, instead of adhering with an adhesive.

Further, although not shown in the drawing, the holding member 120 is provided with a flow path through which the ink flows, a filter for capturing foreign matters, and the like. The flow paths of these holding members 120 communicate with the liquid flow paths of the flow path member 200. As a result, the ink from the liquid storage means provided in the inkjet recording apparatus 1 is supplied to the head main 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 20a 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 by bending a plate-shaped member such as metal. Specifically, the fixed plate 130 includes a base portion 131 provided on the liquid ejecting surface 20a side and a bent portion 132 provided by bending both ends in the Y direction of the base portion 131 toward the Z2 side in the Z direction. To have.

Further, the base portion 131 is provided with an exposure opening portion 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 be opened independently for each head body 110. That is, since the recording head 100 of this embodiment has the six head main 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 exposure opening 133 may be provided for the head main body group composed of a plurality of head main bodies 110.

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

Further, the bent portions 132 are provided at both ends of the base portion 131 in the Y direction, and are formed in a size that covers an opening area of the holding portion 121 that opens to the side surface in the Y direction. That is, the bent portion 132 is a region from the end of the base 131 in the Y direction to the edge of the fixed plate 130. The bent portion 132 is joined to the side surface of the holding member 120 in the Y direction with an adhesive. Thus, the opening of the holding portion 121 on the side surface in the Y direction is covered and sealed by the bent portion 132.

In this way, the fixing plate 130 is adhered to the holding member 120 with the adhesive, so that the head main body 110 is arranged in the holding portion 121, which 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 is provided with a plurality of head main bodies 110 for one recording head 100 to increase the number of nozzle rows, and 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 make multiple rows. That is, if the nozzle row is provided in multiple rows in the single head body 110, the yield of the head body 110 is reduced and the manufacturing cost is increased. On the other hand, by making the nozzle row multi-row by the plurality of head main bodies 110, the yield of the head main bodies 110 can be improved and the manufacturing cost can be reduced.

The opening on the side surface of the holding member 120 in the Y direction is sealed by the bent portion 132 of the fixed plate 130. As a result, even if there is no leg portion for adhering to the base portion 131 of the fixing plate 130 on both sides of the holding member 120 in the Y direction (the hatched portion shown in FIG. 3), it is provided on the side surface of the holding portion 121 in the Y direction. Moisture evaporation from the formed opening can be suppressed.

Therefore, in the head unit 101 in which the recording heads 100 are arranged side by side in the Y direction, the foot portion 122 does not exist on the side of the recording heads 100 adjacent to each other in the Y direction. Therefore, the interval between the recording heads 100 adjacent to each other in the Y direction is narrowed. You can Accordingly, the head bodies 110 of the recording heads 100 adjacent to each other in the Y direction can be provided close to each other, and the nozzle openings 21 provided in the head bodies 110 of the adjacent recording heads 100 can be provided close to each other in the Y direction. be able to.

Although the recording head 100 according to this embodiment is provided with the foot portions 122 on both sides of the holding member 120 in the X direction, the foot portions 122 may be omitted. That is, the head body 110 may be adhered 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 fixed plate 130 in the X direction and the Y direction. That is, the fixed plate 130 is provided with the bent portion 132 over the entire circumference in the in-plane direction of the liquid ejection surface 20 a, and the fixed plate 130 is adhered over the entire circumference of the side surface of the holding member 120. Good. However, by providing the foot portions 122 on both sides of the holding member 120 in the X direction as in the present embodiment, the end surface of the foot portion 122 on the Z1 side is adhered to the base portion 131 of the fixing plate 130, so that the inkjet recording is performed. The strength of the head 100 in the Z direction can be improved, and the evaporation of water from the foot portion 122 can be suppressed.

The head body 110 will be described with reference to FIGS. 7 and 8. FIG. 7 is a perspective view of the head body according to the present embodiment, and FIG. 8 is a cross-sectional view of the head 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 generating chamber 12, a nozzle opening 21, a manifold 95, a pressure generating means, and the like. Therefore, a plurality of members such as the flow path forming substrate 10, the communication plate 15, the nozzle plate 20, the protective substrate 30, the compliance substrate 45, and the case 40 are bonded by an adhesive or the like.

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

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

A communication plate 15 is joined to one surface side of the flow path forming substrate 10. A nozzle plate 20 having 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 in which the nozzle opening 21 of the nozzle plate 20 opens is the liquid ejection surface 20a.

The communication plate 15 is provided with a nozzle communication passage 16 that connects the pressure generating 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. By relatively reducing the area of the nozzle plate 20 in this way, it is possible to reduce costs.

Further, the communication plate 15 is provided with a first manifold 17 and a second manifold 18, which form a part of the manifold 95. The first manifold 17 is provided so as to penetrate the communication plate 15 in the Z direction. The second manifold 18 does not penetrate the communication plate 15 in the Z direction, is opened to the nozzle plate 20 side of the communication plate 15, 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 of the pressure generation chambers 12 in the Y direction, independently for each pressure generation chamber 12. The supply communication passage 19 connects the second manifold 18 and the pressure generating chamber 12.

Nozzle openings 21 are formed in the nozzle plate 20 so as to communicate with the respective pressure generating chambers 12 via the nozzle communication passages 16. A plurality of nozzle openings 21 are arranged side by side in the Xa direction, each of the nozzle openings 21 arranged side by side forms two nozzle rows a and nozzle rows b, and these nozzle rows a and nozzle rows b are arranged side by side 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, and one row can eject two types of liquid.

On the other hand, a vibration plate 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 to form the piezoelectric actuator 300 that is the pressure generating means of the present embodiment. Generally, one of the electrodes of the piezoelectric actuator 300 is used as a common electrode, and the other electrode and the piezoelectric layer are patterned for each pressure generating chamber 12.

Further, a protective substrate 30 having substantially the same size as the flow channel forming substrate 10 is bonded to the surface of the flow channel forming substrate 10 on the piezoelectric actuator 300 side. The protective substrate 30 has a holding portion 31 which is a space for protecting the piezoelectric actuator 300. Further, the protective substrate 30 is provided with a through hole 32 penetrating in the Z direction. The end portion of the lead electrode 90 extracted from the electrode of the piezoelectric actuator 300 is extended 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 done.

Further, a case 40 that defines a manifold 95 that communicates with the plurality of pressure generating chambers 12 is fixed to the protective substrate 30 and the communication plate 15. The case 40 has substantially the same shape as the communication plate 15 described above in a plan view, and is bonded to the protective substrate 30 and also to the communication plate 15 described above. Specifically, the case 40 has, on the protective substrate 30 side, a recess 41 having a depth in which the flow path forming substrate 10 and the protective substrate 30 are accommodated. The recess 41 has a larger opening area than the surface of the protective substrate 30 joined to the flow path forming substrate 10. The opening surface of the recess 41 on the nozzle plate 20 side is sealed by the communication plate 15 with the flow path forming substrate 10 and the like accommodated in the recess 41. As a result, the third manifold 42 is defined by the case 40, the flow channel forming substrate 10 and the protective substrate 30 on the outer peripheral portion of the flow channel 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 this embodiment. Since two types of liquid can be ejected by one nozzle row as described above, the first manifold 17, the second manifold 18, and the third manifold 42 that form the manifold 95 are respectively nozzle rows. Direction, that is, the Xa direction, is divided into two. 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 manifold 95 as a whole 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 that form the manifold 95 are symmetrically arranged with the nozzle row a and the nozzle row b interposed therebetween. According to this, it is possible to eject different liquids for each of the nozzle row a and the nozzle row b. Of course, the arrangement of the manifolds is not limited to this.

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

A compliance substrate 45 is provided on the surface of the communication plate 15 where the first manifold 17 and the second manifold 18 are open. The compliance substrate 45 seals the openings of the first manifold 17 and the second manifold 18.

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

Further, the fixing plate 130 is bonded to the surface of the compliance substrate 45 opposite to the communication plate 15. That is, the exposure opening 133 provided in the base 131 of the fixed plate 130 has an opening area larger than the area of the nozzle plate 20, and the liquid ejection surface 20 a of the nozzle plate 20 is exposed in the exposure opening 133. .. Of course, the fixed plate 130 is not limited to this, and for example, the exposed opening 133 of the fixed plate 130 has an opening area smaller than the outer shape of the nozzle plate 20, and the fixed plate 130 contacts the liquid ejection surface 20 a of the nozzle plate 20. You may make it contact or adhere. Further, even when the exposed opening 133 of the fixed plate 130 has an opening area smaller than the outer shape of the nozzle plate 20, the fixed plate 130 may be provided so as not to contact the liquid ejection surface 20a. That is, the fixed plate 130 being provided on the liquid ejecting surface 20a side includes those which are not in contact with the liquid ejecting surface 20a and those which are in contact with the liquid ejecting surface 20a.

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

In the head main body 110 having such a configuration, when ejecting ink, the ink is taken in from the storage means through the introduction passage 44 and the inside of the passage is filled with ink from the manifold 95 to the nozzle opening 21. After that, according to a signal from the drive circuit 97, a voltage is applied to each piezoelectric actuator 300 corresponding to the pressure generating chamber 12, whereby the piezoelectric actuator 300 and the diaphragm are flexibly deformed. As a result, the pressure inside the pressure generating chamber 12 increases, and ink droplets are ejected from the predetermined nozzle openings 21.

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

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

It should be noted that when the X direction and the Xa direction intersect at an angle greater than 0 degrees and less than 45 degrees, the nozzle row is oriented in the X direction rather than the straight line intersecting the X direction at the angle of 45 degrees in the plane of the liquid ejecting surface 20a. It means a state of being more inclined. Further, the interval D1 mentioned here is an interval between the nozzle openings 21 when the nozzle openings 21 of the nozzle array a and the nozzle array b are projected in the X direction with respect to the virtual line in the Y direction. Further, when the nozzle openings 21 of the nozzle rows a and b are projected in the Y direction with respect to the virtual line in the X direction, the distance between the nozzle openings 21 is D2.

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

The head main bodies 110a to 110c have the same nozzle rows a and b, and by providing the head main bodies 110a to 110c close to each other in the Y direction, each nozzle opening 21 of the head main body 110 adjacent in the Y direction. Are juxtaposed to each other in the X direction. Therefore, for example, the nozzle row a of magenta M and the nozzle row b of yellow Y of the head body 110a overlap the nozzle row a of black Bk and the nozzle row b of cyan C of the head body 110b in the X direction, so that X The four colors are arranged in a line in the direction, and a color image can be printed. Similarly, with respect to the head main body 110b and the head main body 110c that are adjacent to each other in the Y direction, the nozzle openings 21 are also juxtaposed so as to overlap each other in the X direction.

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

Of course, the arrangement of such colors is not limited to this. For example, although not particularly shown, one nozzle row may be arranged so that four colors of black Bk, magenta M, cyan C, and yellow Y can be ejected.

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

In this way, the nozzle rows between the head main bodies 110 and the nozzle rows between the recording heads 100 partially overlap each other in the X direction, so that the image quality at the joint can be improved.

Further, the nozzle pitch and the angle between the X direction and the Xa direction are set such that the distance D1 in the X direction and the distance D2 in the Y direction are integer ratios between the nozzle openings 21 adjacent to each other in the Xa direction of each nozzle row. Is preferred. According to this, when printing the image data composed of pixels arranged in a matrix in the X and Y directions, it becomes easy to associate each nozzle with the 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 in plan from the liquid ejection surface 20a side. This is because, as described above, the Xa direction which is the juxtaposed direction of the nozzle openings a forming the nozzle rows a and the nozzle rows 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 fixing plate 130 is formed to have a substantially parallelogram shape in the same manner as the Xa direction which is the direction in which the nozzle rows a and the nozzle rows b incline. Is. Of course, the shape of the recording head 100 when viewed in plan 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 addition, in the above-described embodiment, an example in which two nozzle rows are provided in one head main body has been described. However, even if the head body has three or more nozzle rows, the same effect as described above can be obtained. Needless to say. As in the present embodiment, if there are two nozzle rows provided in one head body 110, as shown in FIG. 7, each nozzle row is provided between the two manifolds 95 corresponding to each nozzle row. Since the nozzle openings 21 of the nozzle rows can be arranged, compared with the case where the nozzle openings 21 of the plurality of nozzle rows are arranged on the same side with respect to the manifolds corresponding to the respective nozzle rows, two nozzle rows are arranged. The distance in the Ya direction can be narrowed. Therefore, it is possible to reduce the area required for one nozzle plate 20 for two nozzle rows. Also, the piezoelectric actuators 300 of the two nozzle rows and the COF substrate 98 can be easily connected.

Further, in this embodiment, each nozzle row a and 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 equal, and efficient liquid ejection can be performed. However, the number of nozzle openings in each nozzle row does not necessarily have to be the same. Furthermore, the types of liquid ejected by the nozzle rows a and b may all be the same, and, for example, all inks of the same color may be used.

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

The flow path member 200 according to the present embodiment will be described in detail with reference to FIGS. 10 to 16. 10 is a plan view of a first flow path member as the flow path member 200, FIG. 11 is a plan view of a second flow path member as the flow path member 200, and FIG. It is a top view of a 3 channel member, FIG. 13 is a bottom view of a 3rd channel member, FIG. 14 is a BB' sectional view taken on the line of FIGS. 10-13, and FIG. 13 is a sectional view taken along line CC′ of FIG. 13, and FIG. 16 is a sectional view taken along line DD′ of FIGS. 10 to 15. 10 to 12 are plan views on the Z2 side, and FIG. 13 is a bottom view on the Z1 side.

The flow path member 200 is a member provided with a flow path 240 through which ink flows. In the present embodiment, three first flow path members 210, second flow path members 220 and third flow path members 230, which are stacked in the Z direction, and a plurality of flow paths 240 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 shown, the first flow path member 210, the second flow path member 220, and the third flow path member 230 are adhesively fixed by an adhesive, but the present invention is not limited to such an aspect, and is fixed by, for example, 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. The material is not particularly limited, but 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 (holding member 120 in this embodiment) is introduced and a connecting 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 to receive ink from a plurality of connecting portions 290. Is configured to supply.

Part of the four flow paths 240 is the first flow path 241, and the rest are the second flow paths 242. In this embodiment, two first flow paths 241 and two second flow paths 242 are formed. Each of the two first flow paths 241 is referred to as a first flow path 241a and a first flow path 241b. Hereinafter, when the term “first flow channel 241” is used, it means both the first flow channel 241a and the first flow channel 241b. The same applies to the second flow path 242.

The first flow channel 241 includes a first introduction flow channel 281. The first introduction flow channel 281 includes a first cross flow channel 251 to be described later in the first flow channel 241, and a flow channel upstream of the flow channel member 200 (flow channel included in the holding member 120 in the present embodiment). Is a flow path for connecting the. 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 channel 281a has a through hole 211 that opens in the top surface of the protrusion 212 provided on the surface of the first flow channel member 210 on the Z2 side and penetrates in the Z direction, and The flow path member 220 communicates with a through hole 221 that penetrates in the Z direction. The same applies to the first introduction flow path 281b. Hereinafter, when the term “first introduction channel 281” is used, it means the first introduction channel 281a and the first introduction channel 281b.

The second flow path 242 includes a second introduction flow path 282. The second introduction flow path 282 includes a second intersecting flow path 252, which will be described later, of the second flow path 242, and a flow path upstream of the flow path member 200 (a flow path included in the holding member 120 in this embodiment). Is a flow path for connecting the. In the present embodiment, the two second flow paths 242a and 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 surface of the first flow path member 210 on the Z2 side and penetrates in the Z direction. The same applies to the second introduction channel 282b. Hereinafter, when the term “second introduction channel 282” is used, it means the second introduction channel 282a and the second introduction channel 282b.

Furthermore, when the term “introduction channel 280” is used, it means that all of the above-mentioned four introduction channels are referred to.

In the present embodiment, in the plan view shown in FIG. 10, the first introduction flow path 281a is arranged near the upper left corner of the first flow path member 210, and the first introduction flow path 281a is provided near the lower right corner of the first flow path member 210. The introduction flow path 281b is arranged. In the plan view shown in FIG. 10, the second introduction flow passage 282a is arranged near the upper right corner of the first flow passage member 210, and the second introduction flow passage 282a is formed near the lower left corner of the first flow passage member 210. 282b is arranged.

The first flow channel 241 includes a first intersecting flow channel 251 formed by the second flow channel member 220 and the third flow channel member 230. The first intersecting flow channel 251 is a part of the first flow channel 241 that allows the ink to flow 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 intersecting 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 flow passage 251a is formed on the surface of the second flow passage member 220 on the Z1 side along the Y direction and the intersecting groove portion 226a on the surface of the third flow passage member 230 on the Z2 side along the Y direction. It is formed by sealing together the formed crossing groove portion 231a. The first intersecting flow passage 251b is formed on the surface of the second flow passage member 220 on the Z1 side along the Y direction, and the first intersecting flow passage 251b is formed on the surface of the third flow passage member 230 on the Z2 side along the Y direction. It is formed by sealing together the formed crossing groove portion 231b.

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

The first intersecting flow passage 251a and the first intersecting flow passage 251b are arranged 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 passage 252 is a part of the second flow passage 242 that allows the ink to flow in a direction parallel to the liquid ejection surface 20a. In this embodiment, since the two second flow paths 242 are formed, two second intersecting flow paths 252 are also formed. Each of the two second intersecting channels 252 is referred to as a second intersecting channel 252a and a second intersecting channel 252b.

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

For any of the second cross flow channels 252a and 252b, by forming the 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 channel 252a, The cross-sectional area of each 252b is widened to reduce the pressure loss in the second cross flow passages 252a and 252b. The second intersecting channels 252a, 252b may be formed only by the intersecting groove portions 213a, 213b formed only in the first channel member 210, or only in the second channel member 220. It may be formed by the intersecting groove portions 222a and 222b. For example, by forming the intersecting groove portions 222a and 222b only in the first flow path member 210 on the Z2 side, the interference with the COF substrate 98 is prevented while preventing the interference with the COF substrate 98, like the above-described first cross flow paths 251a and 251b. The degree of freedom in arranging the two flow paths 242 can be improved.

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

Hereinafter, when the term "first crossing channel 251" is used, it means both the first crossing channel 251a and the first crossing channel 251b. When the term "second crossing channel 252" is used, it means both the second crossing channel 252a and the second crossing channel 252b. Further, when the cross flow channel 250 is described, it means all of the four cross flow channels described above.

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

In the present embodiment, in the plane parallel to the liquid ejection surface 20a (the boundary surface between the second flow path member 220 and the third flow path member 230), the first cross flow paths 251 to the six first branch flow paths 261 are arranged. Is branched. The six first branch channels 261 branched from the first intersecting channel 251a are referred to as first branch channel 261a1 to first branch channel 261a6. Hereinafter, when it is described as the first branch flow channel 261a, it means that all of the six branch flow channels connected to the first branch flow channel 261a are referred to.

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. Hereinafter, when the term “first branch channel 261b” is used, it means that all of the six branch channels connected to the first branch channel 261b are referred to. Furthermore, when described as the first branch flow channel 261, it is assumed that all of the 12 branch flow channels connected to the first branch flow channel 261a and the first branch flow channel 261b are referred to.

In addition, although the illustration of the symbols of the first branch flow channel 261a2 to the first branch flow channel 261a5 among the six first branch flow channels 261a1 to 261a6 arranged in the Y direction is omitted in the drawing. , Y1 side to Y2 side. The same applies to the first branch flow channel 261b1 to the first branch flow channel 261b6.

Specifically, the Z2 side surface of the third flow path member 230 is provided with a plurality of branch groove portions 232a that communicate with the intersecting groove portions 231a and extend toward the opening 201 side. 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 side are provided. The first branch flow channel 261a is formed by sealing the branch groove portions 227a with the branch groove portions 232a facing each other.

On the surface of the third flow path member 230 on the Z2 side, a plurality of branch groove portions 232b that communicate with the intersecting groove portions 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 side are provided. The first branch flow path 261b is formed by sealing the branch groove portions 232b so that the branch groove portions 232b face each other.

With respect to any of the first branch flow paths 261a and 261b, by forming branch groove portions 227a, 227b, 232a, and 232b in the second flow path member 220 and the third flow path member 230, respectively, the first branch flow path 261a, The cross-sectional area of each 261b is widened to reduce the pressure loss in the first branch flow paths 261a and 261b. The first branch flow paths 261a and 261b may be formed by the branch groove portions 227a and 227b formed only in the second flow path member 220, or may be formed only in the third flow path 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 in which the width in the Ya direction expands from the Z1 side to the Z2 side by inclining in the Ya direction, the branch groove portions 227a and 227b are provided only in the second flow path member 220 on the Z2 side. By forming it, it is possible to improve the degree of freedom in arranging the first channel 241 while preventing interference with the COF substrate 98. Further, in the region P in which the width in the Ya direction expands 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, so that the interference with the COF substrate 98 is prevented. The degree of freedom in arranging the first flow path 241 can be improved while preventing it.

In addition, the second flow path 242 is configured to branch from one introduction flow path 280 to a plurality of connecting portions 290. As will be described later in detail, a plurality of second branch flow passages 262 are formed on the same plane as the second cross flow passage 252 (the first flow passage member 210 and the second flow passage member 220 are joined together). The boundary surface).

In the present embodiment, in the plane parallel to the liquid ejection surface 20a (the boundary surface between the first flow path member 210 and the second flow path member 220), the six second branch flow paths 262 from the second intersecting flow path 252. Is branched. Each of the six second branch channels 262 branched from the second intersecting 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 intersecting channel 252b is referred to as a second branch channel 262b1 to a second branch channel 262b6.

Hereinafter, when it is described as the second branch flow channel 262a, it means that all of the six branch flow channels connected to the second branch flow channel 262a are referred to. When it is described as the second branch flow channel 262b, it means that all the six branch flow channels connected to the second branch flow channel 262b are referred to. Moreover, when described as the second branch flow channel 262, it is assumed that all of the 12 branch flow channels connected to the second branch flow channel 262a and the second branch flow channel 262b are referred to. Furthermore, when described as the branch flow channel 260, it is assumed to refer to all of the 24 branch flow channels described above.

In addition, although the illustration of the reference numerals of the second branch flow channel 262a2 to the second branch flow channel 262a5 among the six second branch flow channels 262a1 to the second branch flow channel 262a6 arranged in the Y direction is omitted in the drawing. , Y1 side to Y2 side. The same applies to the second branch flow channel 262b1 to the second branch flow channel 262b6.

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

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

With respect to any of the second branch channels 262a and 262b, by forming the branch groove portions 214a, 214b, 223a, and 223b in the first channel member 210 and the second channel member 220, respectively, the second branch channel 262a, The cross-sectional area of each 262b is widened to reduce the pressure loss in the second branch flow passages 262a and 262b. 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 described later, in the region Q in which the width in the Ya direction increases from the Z1 side to the Z2 side by inclining in the Ya direction, the branch groove portions 214a and 214b are provided only in the first flow path member 210 on the Z2 side. By forming it, it is possible to improve the degree of freedom in arranging the second flow path 242 while preventing interference with the COF substrate 98. Further, in the region P in which the width in the Ya direction expands 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, so that the interference with the COF substrate 98 is prevented. The degree of freedom in arranging the second flow path 242 can be improved while preventing it.

A first vertical flow path 271 is connected to the first branch flow path 261 at an end opposite to the first intersecting 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 the present embodiment, one for each of the first branch flow channels 261a1-261a6 and the first branch flow channels 261b1-261b6, that is, 12 first vertical flow channels 271a1-271a6, the first vertical flow channel as a whole. The paths 271b1-271b6 are connected.

Similarly, the second vertical flow channel 272 is connected to the second branch flow channel 262 at the end opposite to the second cross flow channel 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 the present embodiment, one for each of the second branch channels 262a1-262a6 and each of the second branch channels 262b1-262b6, that is, 12 second vertical channels 272a1-272a6 and the second vertical channels as a whole. The paths 272b1-272b6 are connected.

Hereinafter, when described as the first vertical flow channel 271a, refers to the first vertical flow channel 271a1-271a6, when described as the first vertical flow channel 271b, refers to the first vertical flow channel 271b1-271b6, When described as the first vertical flow channel 271, it means all of the first vertical flow channel 271a and the first vertical flow channel 271b.

Similarly, when described as the second vertical flow path 272a, it refers to the second vertical flow paths 272a1 to 272a6, and when described as the second vertical flow path 272b, it refers to the second vertical flow paths 272b1 to 272b6. , The second vertical flow channel 272, it means all of the second vertical flow channel 272a and the second vertical flow channel 272b.

Further, when the vertical flow path 270 is described, it means that all of the above-mentioned 24 vertical flow paths are indicated.

Note that, in the drawing, among the six first vertical flow paths 271a1 to 271a6 arranged in the Y direction, reference numerals of the first vertical flow path 271a2 to the first vertical flow path 271a5 are omitted. , Y1 side to Y2 side. The same applies to the first vertical flow channel 271b1 to the first vertical flow channel 271b6, the second vertical flow channel 272a1 to the second vertical flow channel 272b6, and the second vertical flow channel 272b1 to the second vertical flow channel 272b6.

The vertical flow path 270 described above has the connection portion 290 that is an opening on the Z1 side of the third flow path member 230. Although the details will be described later, the connecting 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 parts 291a1 to 291a6 and the first connection parts 291b1 that are openings on the Z1 side of the third flow path member 230. .About.291b6 respectively. Similarly, the second vertical flow passages 272a1 to 272a6 and the second vertical flow passages 272b1 to 272b6 are second connection portions 292a1 to 292a6 and second connection portions 292b1 to 292b6 which are openings on the Z1 side of the third flow passage member 230. Have respectively.

The first connecting portion 291a1, the first connecting portion 291b1, the second connecting portion 292a1, and the second connecting portion 292b1 are connected to one of the six head main bodies 110. In addition, the same applies to the first connecting portions 291a2 to 291a6, the first connecting portions 291b2 to 291b6, the second connecting portions 292a2 to 292a6, and the second connecting 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 it is described as the first connection portion 291a, it refers to the first connection portions 291a1 to 291a6, and when described as the first connection portion 291b, it refers to the first connection portions 291b1 to 291b6 and the first connection portion. When described as 291, all the 1st connection part 291a and the 1st connection part 291b shall be pointed out.

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 and the second connection portions. When described as the part 292, the second connecting part 292a and the second connecting part 292b are all referred to.

Furthermore, when described as the connection portion 290, it is assumed that all of the above-mentioned 24 connection portions are referred to.

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

In this embodiment, four color inks of black Bk, magenta M, cyan C, and yellow Y are used. 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 from a liquid storage means (not shown). Then, the ink of each color 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 main body 110.

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

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 an elongated opening shape in the Xa direction, and six openings 201 are arranged side by side in the Y direction.

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

In the present embodiment, the portion of the COF substrate 98 that is inserted into the first opening 215 and the third opening 235 has a rectangular shape with a constant width in the Xa direction, and the portion that is inserted into the second opening 225 is Z1. The 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 is closer to the head body 110 in the Z direction perpendicular to the liquid ejecting surface 20 a (that is, the Z1 side opening of the third opening 235) and the head body 110. It has a distant second opening 216 (that is, an opening on the Z2 side of the first opening 215).

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 in the Z direction to Z2. Specifically, the opening 201 is shaped to accommodate the COF substrate 98, and the width of the opening 201 in the Xa direction is slightly wider than the width of the COF substrate 98 in the Xa direction.

The inclination of the COF substrate 98 inserted into the opening 201 of the flow path member 200 will be described with reference to FIG. FIG. 17A is a cross-sectional view taken along the line EE′ of FIGS. 10 to 13, and is a schematic side view of one of the recording heads according to the present embodiment, which is viewed from the Xa2 side to the Xa1 side in the Xa direction. Is. FIG. 17B is a schematic side view of the head body according to the comparative example as seen from the Xa2 side to the Xa1 side in the Xa direction.

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, of the openings 201 of the flow path member 200, a surface of the COF substrate 98 that passes through the first opening 236 on the head body 110 side and the second opening 216 on the side opposite to the head body 110 is a plane B (however, 17A, a plane that intersects the plane B at the first opening 236, is parallel to the Xa direction, and is perpendicular to the liquid ejection surface 20a is the plane A (however, FIG. Is shown as a straight line), the plane B, which is the plane 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 on the Ya2 side in the Ya direction with a predetermined distance from the corresponding first openings 236. That is, the opening 201 is inclined such 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 body 110 side toward the flow path member 200, and connects the head body 110 and the relay substrate 140 (see FIG. 2). In the flow path member 200 between them, the COF substrate 98 is inclined to the one surface side. Here, of both surfaces of the COF substrate 98, this one surface is referred to as a first surface 98a and the other surface is referred to as a second surface 98b. In this case, the first surface 98a of the COF substrate 98 is the surface that does not face the plane A, that is, the surface on the Ya2 side in the Ya direction. The second surface 98b of the COF substrate 98 is the surface facing the plane A, that is, the surface on the Ya1 side in the Ya direction.

Further, “the COF substrate 98 inclines toward the first surface 98a side in the flow path member 200 between the head body 110 and the relay board 140” means that the flow path member 200 in the COF board 98 extends from the head body 110. The part up to the second opening 216 corresponding to the exit of the opening 201 is inclined toward the first surface 98a side. 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 distance 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, each of the first flow path member 210, the second flow path member 220, and the third flow path member 230 is provided with a first opening 215, a first flow path member 215, and a third flow path member 230 so that the first flow path member 210, the second flow path member 220, and the third flow path member 230 have a substantially constant distance from the inclined COF substrate 98. The widths of the second opening 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 and viewed from the Xa direction. The shape of the opening 201 is stepwise as shown in FIG. Of course, the opening 201 may also be inclined along the inclination of the COF substrate 98. The COF substrate 98 inserted through the opening 201 is inclined toward the first surface 98a side (that is, the Ya2 side) with respect to the plane A by being inserted through 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 and the introduction path 44 provided on the Ya2 side are arranged such that the distance between the introduction path 44 and the connection port 43 in the Ya direction is substantially the same. On the other hand, the COF substrate 98 is arranged so that its connecting portion is located substantially at the center of the connection port 43 in order to easily electrically connect to the lead electrodes 90 from both sides in the Ya direction of the COF substrate 98. There is. In other words, the COF substrate 98 is arranged close to one side surface of the connection port 43 in the Ya direction (Ya1 side in FIG. 8 ), and as a result, the COF substrate 98 is connected to any of the introduction paths 44 in the Ya direction. They are placed close together. However, in the flow channel member 200, the distance between the flow channel member 200 and the COF substrate 98 in the Ya direction is set to be substantially constant on both the Ya1 side and the Ya2 side to prevent contact between the flow channel member 200 and the COF substrate 98. , Ya direction.

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

This will be described in detail with reference to FIGS. 17 and 18. FIG. 18 is a schematic plan view of one head body of the recording head according to the present embodiment as seen from the Z2 side to the Z1 side in the Z direction.

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 44a and 44b are opened to the Ya1 side in the Ya direction with respect to the connection port 43, and the position in the Xa direction is a position included in the connection port 43. The introduction path 44a is arranged closer to the Xa1 side than the introduction path 44b in the Xa direction. The remaining two introduction paths 44c and 44d open toward 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 arranged on the Xa1 side in the Xa direction with respect to 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 passage 44a is the second passage 242a, that is, the second introduction passage 282a (see FIG. 14), the second intersecting passage 252a, the second branch passage 262a, the second vertical passage 272a, and the second connecting portion 292a. It is connected to the.

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

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

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

The relationship between the introduction passages 44a to 44d and the first flow passage 241 and the second flow passage 242 is the same for the six head main bodies 110.

Thus, the first flow path 241 is connected to the head body 110 on the side of the first surface 98a of the COF substrate 98. The second flow path 242 is connected to the head body 110 on the second surface 98b side of the COF substrate 98.

Here, as shown in FIG. 17A, the COF substrate 98 is inclined to the first surface 98a side, and the opening 201 is also inclined to the first surface 98a (Y2 side). When the openings 201 are inclined toward the first surface 98a in this way, it is possible to provide sparseness and denseness in the region of the flow channel member 200 where the flow channels 240 can be formed.

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

In the present embodiment, of the first flow path member 210, the second flow path member 220, and the third flow path member 230 forming the flow path member 200, the first surface in the Ya direction of the region T facing the head body 110. The area 98a is the area P, and the second surface 98b is the area Q. In the drawing, hatching is shown to indicate these regions P and Q.

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

The width of the region Q in the Ya direction becomes wider from the Z1 side in the Z direction toward the Z2 side. In the present embodiment, the difference in the density of the region P and the region Q of the first flow path member 210 is larger than that of the second flow path member 220. Similarly, the difference in density of the region P and the region Q of the second flow path member 220 is larger than that of the third flow path 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.

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

In the present embodiment, the second branch flow channel 262a of the second flow channel 242a is provided in the region Q. Further, the second branch flow passage 262b of the second flow passage 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 side, so that the opening 201 of the flow path member 200 can also be provided while being moved to the first surface 98a side. Density can be provided in a region of the road member 200 where the flow path 240 can be formed. As a result, the second branch flow passage 262 forming the second flow passage 242 can be arranged in the area Q wider than the area P. That is, since the second branch flow passage 262 can be arranged in a wider area Q, it becomes easy to configure the optimum second flow passage 242 according to the arrangement of the head body 110. In other words, the wider the area Q, the higher the degree of freedom in the arrangement of the second flow path 242. The degree of freedom of arrangement of the second flow path 242 here is a concept that is proportional to the width of the area Q in the Ya direction, and the higher the degree of freedom, the easier it is to form the second flow path 242 in the area Q. means. The second flow path 242 of the present embodiment corresponds to a flow path having a portion provided along the liquid ejecting 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, by sloping the COF substrate 98, it is possible to form the sparse region Q whose width is increased in the Ya direction. Since the width in the Ya direction is widened in this manner, the second branch flow channel 262 forming a part of the second flow channel 242 can be formed in the Ya direction without interfering with the COF substrate 98.

As a result, in the Ya direction of the second flow path member 220, the distance between the second branch flow path 262 and the plane A can be narrowed, as compared with a comparative example described later, so that the second flow path member 220, that is, The flow path member 200 can be downsized in the Ya direction, and thus the width of the recording head 100 in the Ya direction can be downsized.

Further, as described above, in the present embodiment, the COF substrate 98 is arranged 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. They are placed close together. The branch flow path 260 connected to the introduction path 44 via the vertical flow path 270 has a certain distance in the Ya direction from the COF substrate 98, so that the branch flow path 260 on the Ya1 side of the COF substrate 98 is arranged. The degree of freedom of is narrowing. However, by tilting the COF substrate 98 toward the Ya2 side which is the opposite side thereof, even in such a case, the degree of freedom in arranging the branch flow passage 260 on the Ya1 side of the COF substrate 98 is increased, and the flow passage member is formed. It is possible to reduce the size of 200 in the Ya direction.

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

The distance in the Ya direction between the second opening 225 and the second branch flow passage 262a shown in FIG. 17A is V. On the other hand, FIG. 17B shows a schematic side view of the recording head according to the comparative example. The recording head 100 ′ according to the comparative example has the same configuration as the recording head 100 except for the inclination of the COF substrate 98, the arrangement of the openings 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 channel 262 a ′ provided in a plane parallel to the liquid ejection surface 20 a without interfering with the COF substrate 98 in the Ya direction, the same spacing as the recording head 100 is formed. If V is maintained, the second branch flow path 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, in the Ya direction of the flow path member 200, the distance between the second branch flow path 262 a ′ and the plane A becomes wide, and the flow path member 200 is small in the Ya direction. Cannot be realized. In other words, as shown in FIG. 17A, since the COF substrate 98 is inclined toward the first surface 98a side, the second vertical channel 272a is formed 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, it is possible to reduce the size of the flow path member 200 in the Ya direction.

In addition, in the recording head 100 according to the present embodiment, the first cross channel 251a and the second cross channel 252a of the first flow channel 241 and the second flow channel 242, and the first cross channel 251b and the second cross channel 251a, respectively. The intersecting flow paths 252b are arranged so as to overlap each other in the Z direction while changing their positions in the Z direction orthogonal to the liquid ejection surface 20a. As a result, the shape of the recording head 100 in the surface direction of the liquid ejection surface 20a can be made smaller than in the case where a plurality of intersecting flow paths are all formed in the same plane.

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

The width of the vertical flow path 270 in the Ya direction may be smaller than the width of the branch flow path 260 in the Ya direction. In that case, the degree of freedom in arranging the vertical flow passage 270 and the branch flow passage 260 can be further increased while maintaining the distance V from the opening 201 as compared with the case where it is not. In addition, the cross-sectional area of the vertical flow passage 270 may be smaller than the cross-sectional area of the branch flow passage 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 of the connection port 43 on the Ya2 side, the width of the region P in the Ya direction is set to have a constant distance from the COF substrate 98 in the Ya direction. It gets 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 (also, for example, the Ya2 side) match. However, the degree of freedom in arranging the second flow path 242 in the region P is low, which makes it extremely difficult to arrange the second flow path 242. However, in the present embodiment, by forming the second branch flow channel 262 in the region Q, the degree of freedom in the arrangement of the second branch flow channel 262 is increased, and the flow channel member 200 is miniaturized in the Ya direction. .. Further, by not matching 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 (also, for example, the Ya2 side), In the Ya direction, the degree of freedom in arranging the branch flow channel 260 on the side where the COF substrate 98 is close to the side surface of the connection port 43 is increased, and the flow channel member 200 is downsized in the Ya direction.

On the other hand, it is assumed that the first flow path 241 is formed in the area Q. In this case, the flow path member 200 has the first flow path 241 formed 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 increases. 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 size of the liquid ejection surface 20a in the surface direction, the first cross flow passage 251a and the second cross flow passage 252a, the first cross flow passage 251b, and the second cross flow passage 251b are formed. Assuming that the flow path 252b is arranged in the Z direction while changing its position in the Z direction, the first branch flow path 261 and the second branch flow path 262 are both formed in the region Q. The degree of freedom is not so high as compared with the case where the two-branch flow channel 262 is formed in the region Q and the first branch flow channel 261 is formed in the region P. However, in this embodiment, by forming the first branch flow channel 261 in the region P, the degree of freedom in the arrangement of the first branch flow channel 261 is increased, and the flow channel member 200 is miniaturized in the Ya direction. .. Further, regarding the first intersecting flow passage 251 and the second intersecting flow passage 252 which are arranged in the Z direction in an overlapping manner, the first branch flow passage 261 and the second branch flow passage 262 are not arranged in the Z direction in an overlapping manner. The degree of freedom of arrangement of the first branch flow channel 261 and the second branch flow channel 262 is increased, and the flow channel member 200 is downsized in the Ya direction.

In addition, as described above, in the COF substrate 98 according to the present embodiment, the width of the upper end portion 98d in the surface direction (Xa direction) is narrower than the width of the lower end portion 98c (see FIG. 16) in the surface direction. The opening 201 is formed so as to match the COF substrate 98. Therefore, since the upper end 98d of the COF substrate 98 is narrowed in the surface direction, the flow path member 200 is formed with the regions W in which the second flow paths 242 can be formed on both outer sides of the second opening 216 in the surface direction. Has been done.

In the present embodiment, the second intersecting flow channel 252 and the second branch flow channel 262 of the second flow channel 242 are formed in the first flow channel member 210 and the second flow channel member 220. Therefore, in the first flow path member 210 and the second flow path member 220, the outer side portion of the openings 215, 225 in the Xa direction becomes the region W (see FIG. 16). In the present embodiment, the first intersecting flow passage 251 and the second intersecting flow passage 252 are arranged so as to overlap in the Z direction (see FIGS. 14 and 15). In this case, when the first intersecting flow channel 251 and the second intersecting flow channel 252 are projected on the liquid ejection surface 20a in the Z direction, the respective images do not have to be completely coincident with each other, and the images of the respective images do not match each other. The arrangement may be such that a part thereof overlaps, and further, at least a part of the image of the second intersecting channel 252 is an image of the first intersecting channel 251 in the X direction rather than the image of the first intersecting channel 251. May be inside. That is, the second intersecting flow passage 252a of the second flow passage 242a may be formed so as to pass through the region W. It should be noted that the second crossing channel 252b and the second branching channel 262 may be formed so as to pass through the region W, not limited to the second crossing channel 252a. In these cases, for example, the second cross flow passage 252 and the second branch flow passage 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 this case, it is possible to avoid interference with the COF substrate 98 at the position where the second intersecting channel 252 and the second branch channel 262 are provided in the Z direction.

As described above, by forming the COF substrate 98 in which the upper end portion 98d is narrower than the lower end portion 98c and providing the opening 201 in accordance with the COF substrate 98, the second flow is provided outside the COF substrate 98 in the Xa direction. A region W forming the path 242a can be provided. The same applies to the second flow path 242b. This further improves the degree of freedom in arranging the second flow path 242 in the flow path member 200.

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

Here, the drive circuit 97 may contact 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 widened by the thickness of the drive circuit 97. By increasing the width of the opening 201 in the Ya direction, it is possible to effectively suppress contact between the drive circuit 97 and the inner surface of the opening 201. Further, at this time, the drive circuit 97 is arranged in a position to be housed 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, and It is not arranged in a position to be accommodated in the first opening 215 of the one-passage member 210. 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. This further improves the degree of freedom in arranging the second flow path 242 in the flow path member 200.

It should be noted that if the drive circuit 97 is placed at a position to be 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. Therefore, the degree of freedom in arranging 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 housed in the second opening 225 and the third opening 235 in the Z direction, and the first opening 215 in the Ya direction is arranged. By reducing the width, the degree of freedom in arranging the second flow paths 242 such as the second intersecting flow paths 252 and the second branch flow paths 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 channel 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 configuring the first flow path 241 is formed in the above-described area P and the head main body 110 is formed. It is connected to the introduction path 44 of. The first branch flow channel 261 of the present embodiment corresponds to the flow channel provided along the liquid ejection surface on the first surface side of the present invention.

In the dense region P, since the width in the Ya direction is reduced, it may not be possible to secure a region P having a sufficient width for disposing the first branch flow channel 261. However, in the present embodiment, the first flow path 241 is arranged closer to the head body 110 than the second flow path 242 in the Z direction.

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

<Other Embodiments>
Although one embodiment of the present invention has been described above, the basic configuration of the present invention is not limited to the above.

For example, in each head body 110 of the recording head 100 according to the first embodiment, the nozzle row a and the nozzle row b are along the Xa direction, and the nozzle row a and the nozzle row b are inclined with respect to the X direction which is the transport direction. In the case of causing it, as described above, the X direction and the Xa direction may intersect at an angle greater than 0 degrees and less than 90 degrees, but the present invention also includes the recording head 100 in a mode in which the X direction and the Xa direction do not intersect. Alternatively, the recording head including the head main 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, the recording head 100 according to the first embodiment is downsized in the Ya direction. However, in the recording head 100 in a mode in which the Ya direction is aligned with the X direction, the X direction corresponding to the Ya direction, that is, the recording sheet S The size can be reduced in the transport direction.

In addition, the recording head 100 according to the first embodiment includes a first flow path 241 and a second flow path 242, and the first cross flow path 251 and the second cross flow path 252 are provided at different positions in the Z direction. However, the present invention is not limited to such an aspect. For example, the flow path parallel to the liquid ejecting surface 20a may be a recording head including a flow path member provided only on the same plane. For example, in the above-described embodiment, the recording head may include a flow path member including the first flow path member 210 and the second flow path member 220 and only the second flow path. As described above, if the recording head does not have the first flow path 241 or the second flow path 242, the recording head 100 can be downsized in the Z direction.

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

In addition, the first flow channel member 210 and the second flow channel member 220 are bonded to form the second flow channel 242, and the second flow channel member 220 and the third flow channel member 230 are bonded to each other to form the first flow channel 241. However, the method of forming the first flow channel 241 and the second flow channel 242 is not limited to these. For example, two or more flow path members may be integrally molded without adhering by a layered molding method capable of three-dimensional molding. Alternatively, the individual flow path members may be formed by three-dimensional molding, die molding (injection molding or the like), cutting work, or press work.

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

The first intersecting flow channel 251a is branched into six first branch flow channels 261a, but the first crossing flow channel 251a may be connected to one head main body 110 without branching, or the number of branching is six. The number is not limited to one, and may be branched into two or more. The same applies to the first intersecting channel 251b, the second intersecting channel 252a, and the second intersecting channel 252b. Further, the number of COF substrates 98 tilted to the first surface 98a side is not limited to six, and only some of the COF substrates 98 may be tilted.

Further, the first intersecting flow channel 251a is a flow channel that allows the ink to flow horizontally between the second flow channel member 220 and the third flow channel member 230, but is not limited to such a mode. That is, the flow path may be inclined with respect to the Z plane. The same applies to the first intersecting channel 251b, the second intersecting channel 252a, and the second intersecting channel 252b.

Further, the first vertical flow path 271a is formed perpendicularly to the liquid ejecting surface 20a, but the present invention is not limited to this mode. That is, it may be inclined with respect to the liquid ejection surface 20a. The same applies to the first vertical flow channel 271b, the second vertical flow channel 272a, and the second vertical flow channel 272b.

The second opening 216 of the opening 201 formed in the flow path member 200 does not need to be narrower in width in the Xa direction than the first opening 236. The opening may be such that the widths 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. On the contrary, the second opening 216 may be wider than the first opening 236 in the Xa direction.

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

Further, in the first embodiment, the holding member 120 and the flow path member 200 are fixed with an adhesive or the like, but they may be integrated. That is, the holding portion 121 and the foot portion 122 may be provided on the Z1 side of the flow path member 200. This makes it possible to reduce the size of the holding member 120 in the Z direction as much as the holding members 120 are 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 can accommodate the plurality of head main bodies 110, and the relay substrate 140 does not have to be housed, so that the size can be reduced in the XY directions. .. Furthermore, by integrating a plurality of members, the number of parts can be reduced. When the flow path member 200 is configured by the first flow path member 210, the second flow path member 220, and the third flow path member 230, the holding portion 121 and the foot portion are provided on the Z1 side of the third flow path member 230. 122 may be provided.

Further, in the first embodiment, the head main body 110 is juxtaposed in the Y direction, and the recording head 100 is configured by the plurality of head main bodies 110, but the recording head 100 may be configured by one head main body 110. Also, the number of recording heads 100 included in the head unit 101 is not particularly limited, and two or more recording heads may be mounted, or one recording head 100 may be mounted alone in the inkjet recording apparatus 1. Good.

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

Furthermore, the present invention is broadly applicable to liquid jet head units in general, and for example, manufacture of recording heads such as various ink jet recording heads used in image recording devices such as printers, and color filters such as liquid crystal displays. In a liquid ejecting head unit including a color material ejecting head used for an electrode, an organic EL display, an electrode material ejecting head used for forming electrodes such as FEDs (field emission displays), and a bio-organic substance ejecting head used for biochip manufacturing. Can be applied.

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

1 inkjet recording device (liquid ejecting device), 43 connection port, 44a, 44b, 44c, 44d introduction path, 97 drive circuit, 98 COF substrate, 98a first surface, 98b second surface, 98c lower end portion, 98d Upper end part, 100 recording head, 101 head unit, 110 head body, 140 relay substrate, 200 flow path member, 201 opening part, 210 first flow path member, 216 second opening, 220 second flow path member, 230th 3 flow path members, 236 first opening, 240 flow path, 241 first flow path, 242 second flow path, 251 first cross flow path, 252 second cross flow path, 261 first branch flow path, 262 second flow path Branch flow path, 271 first vertical flow path, 272 second vertical flow path, 281 first introduction flow path, 282 second introduction flow path, 291 first connection part, 292 second connection part, 300 piezoelectric actuator

Claims (8)

A liquid jet head comprising a plurality of substrates stacked in a first direction,
Multiple pressure generating chambers,
A plurality of manifolds communicating with a plurality of pressure generating chambers and having a second direction perpendicular to the first direction as a longitudinal direction;
A plurality of branch channels along the second direction,
A plurality of through-holes that connect the plurality of manifolds and the plurality of branch flow paths, respectively, and that penetrate in the first direction;
A flow path that is connected to the plurality of branch flow paths and has a third direction perpendicular to the first direction as a longitudinal direction;
Equipped with
The third direction intersects the second direction at an angle larger than 0 degrees and smaller than 90 degrees when viewed from the first direction,
A plurality of the manifolds are arranged in the third direction,
The liquid jet head according to claim 1, wherein the plurality of branch flow paths are arranged in the third direction. Multiple electrodes,
A piezoelectric layer disposed between the plurality of electrodes in the first direction,
Equipped with
The liquid jet head according to claim 1, wherein the electrode is arranged between the branch flow path and the pressure generating chamber in the first direction. A nozzle plate having a plurality of nozzles for ejecting liquid,
The liquid ejecting head according to claim 1, wherein a part of the manifold is arranged between the pressure generating chamber and the nozzle plate in the first direction. A plurality of said substrates,
A first substrate including a communication passage that connects the nozzle and the pressure generating chamber, and a part of the manifold;
A second substrate including the pressure generating chamber;
Including,
The flow path, the branch flow path, and the through hole are composed of a plurality of substrates, of the plurality of substrates, which are arranged on the opposite side of the second plate in the first direction from the nozzle plate. Was
The liquid jet head according to claim 3, wherein the first substrate is arranged between the second substrate and the nozzle plate in the first direction. A nozzle plate having a plurality of nozzles for ejecting liquid,
The liquid jet head according to claim 1, wherein the nozzle plate is a silicon substrate. The liquid jet head according to claim 1, wherein the manifold and the branch flow path are parallel to each other. The flow path is provided in plurality,
The plurality of flow paths have liquid flow directions along each other,
The liquid jet head according to claim 1, wherein the plurality of branch flow paths are provided between the plurality of flow paths in the second direction. The flow path is provided in plurality,
The plurality of flow paths are point-symmetrical,
The liquid jet head according to claim 1, wherein the plurality of branch flow paths are provided between the plurality of flow paths in the second direction.

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