JP4696800B2 - Inkjet recording device - Google Patents

Description

  The present invention relates to an ink jet recording apparatus.

  Conventionally, an ink intake passage portion (ink supply hole) for taking ink, a plurality of nozzle holes for ejecting ink, a plurality of pressure chambers for supplying ink to the plurality of nozzle holes, and ink supplied to the pressure chamber are temporarily An ink jet comprising a cavity unit including a common ink chamber (manifold) to be stored and configured by stacking a plurality of plate members, and ejecting ink from the nozzle holes to the recording medium when the pressure chamber is pressurized. Type recording devices are known.

  In such an ink jet recording apparatus, in order to remove foreign matters contained in ink, a filter portion for removing foreign matters is generally provided at the upstream end opening of the ink intake passage portion. A plate member thicker than the filter unit is disposed so as to surround, and a flat space is formed between the filter unit and the lower surface of the ink supply member located on the upstream side thereof. There is known one that is easily removed by a fast ink flow in the space (see, for example, Patent Document 1).

  Further, there is also known a plate member that is formed by arranging a large number of filter holes in a position corresponding to an ink supply hole in a plate member stacked on the upper side of a common ink chamber (manifold) (for example, Patent Document 2).

Such a filter part is manufactured so that the amount of foreign matter accumulated on the filter part is assumed, that is, the filter effect can be secured for a certain period even if the foreign matter is clogged to some extent.
JP 2004-306540 A (paragraph 0033 and FIG. 4) JP 2003-319551 A (paragraph 0061 and FIG. 6)

  The filter parts described in Patent Documents 1 and 2 described above are directly opposed to the ink supply holes, the ink flowing from the ink supply holes hits the filter part at a right angle, and the foreign matter captured by the filter parts faces the ink supply holes. It will be deposited as it is at the position. For this reason, clogging is likely to occur early on the entire filter surface, and the areas of the ink supply holes and the filter portion need to be increased more than necessary.

  The present invention supplies ink to the common ink chamber (manifold) as a flow from the lower side to the upper side of the filter unit, thereby avoiding the accumulation of foreign matters on the filter unit and increasing the filter area. It is an object of the present invention to provide an ink jet recording apparatus that can ensure a comparable filter life.

According to a first aspect of the present invention, there is provided an ink intake passage portion that takes in ink, a filter portion that removes foreign matters contained in the taken ink, a plurality of nozzle holes that eject ink, and a plurality that supplies ink to the plurality of nozzle holes. Including a common ink chamber that temporarily stores ink to be supplied to the pressure chamber, and a cavity unit configured by stacking a plurality of plate members. In the ink jet recording apparatus for recording by ejecting ink from the nozzle holes, the cavity unit includes the plurality of pressure chambers on one side of the first plate member in which the filter portion is formed. A second plate member that forms the common ink chamber extending in the column direction is disposed, and the second plate member is disposed on the other side of the first plate member. A third plate member having a guide passage portion for guiding the ink taken in from the ink take-in passage portion in a direction in which the ink flows along the lower surface of the filter portion prior to flowing into the filter portion is disposed. The taken-in ink is supplied to the common ink chamber as a flow from the lower side to the upper side of the filter part through the guide passage part, and the cavity unit further corresponds to the filter part and has a foreign substance. The fifth plate member is formed with a reservoir recess, and the fifth plate member is disposed on the opposite side of the first plate member with respect to the third plate member, and the reservoir recess Is arranged corresponding to the filter portion with the guide passage portion interposed therebetween .

In this way, the taken-in ink is guided in the direction of flowing along the lower surface of the filter portion through the guide passage portion prior to flowing into the filter portion, and the upper side from the lower side of the filter portion. As a flow to the common ink chamber, a force acts in the direction of falling against the foreign matter (the direction away from the filter unit), the entry to the filter unit side is suppressed, and clogging of the filter unit is avoided. The Therefore, clogging over the entire filter surface is avoided, and it is possible to ensure the same filter life as before without increasing the filter area.
In addition, the foreign matter is carried by the ink flowing in the direction of the guide passage, and is supplied to the common ink chamber as a flow from the lower side to the upper side of the filter unit. ), The entry to the filter portion side is suppressed, and the foreign matter is accumulated in a reservoir recess disposed corresponding to the filter portion with the guide passage portion interposed therebetween. As a result, the foreign matter contained in the ink is reduced prior to the inflow into the filter unit, so that clogging of the filter unit is reduced.

  According to a second aspect of the present invention, in the ink jet recording apparatus according to the first aspect, the ink take-in passage portion causes the taken-in ink to flow in the thickness direction of the plate member, and the guide passage with respect to the filter portion. The guide passage portion is formed as a through hole in the third plate member, the upstream end portion is on the downstream side of the ink intake passage portion, and the downstream end portion is on the downstream side. It is characterized by communicating with the upstream side of the filter unit.

  In this way, by using the guide passage portion as a through hole, the configuration of the guide passage portion that guides ink in the direction of flowing along the lower surface of the filter portion is simplified. Further, by disposing the ink intake portion with respect to the filter portion in the flow direction in the guide passage, it becomes possible to easily generate a flow along the lower surface of the filter portion.

According to a third aspect of the present invention, in the ink jet recording apparatus according to the first or second aspect, the cavity unit further includes a fourth plate member in which the pressure chamber is formed as a through hole, and the third plate member The third plate member, the first plate member, the second plate member, and the fourth plate member are laminated in this order so that is located in the lowermost layer and the fourth plate member is located in the uppermost layer. The ink intake passage portion is formed as a through hole in the first plate member, the second plate member, and the fourth plate member.

  In this way, since the cavity unit is configured by laminating plate members having necessary components as the recording head, such as the filter section, the guide passage, the pressure chamber, and the common ink chamber, the structure of the cavity unit Becomes easier.

According to a fourth aspect of the present invention, there is provided an ink intake passage portion that takes in ink, a filter portion that removes foreign matters contained in the taken ink, a plurality of nozzle holes that eject ink, and a plurality that supplies ink to the plurality of nozzle holes. Including a common ink chamber that temporarily stores ink to be supplied to the pressure chamber, and a cavity unit configured by stacking a plurality of plate members. In the ink jet recording apparatus for recording by ejecting ink from the nozzle holes, the cavity unit includes the plurality of pressure chambers on one side of the first plate member in which the filter portion is formed. A second plate member that forms the common ink chamber extending in the column direction is disposed, and the second plate member is disposed on the other side of the first plate member. A third plate member having a guide passage portion for guiding the ink taken in from the ink take-in passage portion in a direction in which the ink flows along the lower surface of the filter portion prior to flowing into the filter portion is disposed. The taken-in ink is supplied to the common ink chamber as a flow from the lower side to the upper side of the filter portion through the guide passage portion, and the third plate member corresponds to the common ink chamber. Thus, the damper chamber is formed as a through hole or a recess, and the portion of the first plate member sandwiched between the damper chamber and the common ink chamber is elastic to bend toward the damper chamber and the common ink chamber. has, the filter unit, said common ink chamber is formed to extend, the damper chamber to characterized in that it is formed in parallel with the filter portion .

In this way, the pressure wave of the ink propagated to the common ink chamber as the ink is ejected can be absorbed by the deflection of the first plate member, and so-called crosstalk that propagates to the other pressure chamber is prevented. be able to. Further, the area of the filter part can be ensured by devising the layout of the damper chamber and the filter part.

According to a fifth aspect of the present invention, in the ink jet recording apparatus according to the fourth aspect, the ink take-in passage portion causes the taken-in ink to flow in the thickness direction of the plate member, and the guide passage with respect to the filter portion. The guide passage portion is formed as a through hole in the third plate member, the upstream end portion is on the downstream side of the ink intake passage portion, and the downstream end portion is on the downstream side. It is characterized by communicating with the upstream side of the filter unit .

In this way, by using the guide passage portion as a through hole, the configuration of the guide passage portion that guides ink in the direction of flowing along the lower surface of the filter portion is simplified. Further, by disposing the ink intake portion with respect to the filter portion in the flow direction in the guide passage, it becomes possible to easily generate a flow along the lower surface of the filter portion.

According to a sixth aspect of the present invention, in the ink jet recording apparatus according to the fourth or fifth aspect, the cavity unit further includes a fourth plate member in which the pressure chamber is formed as a through hole, and the third plate member The third plate member, the first plate member, the second plate member, and the fourth plate member are laminated in this order so that is located in the lowermost layer and the fourth plate member is located in the uppermost layer. The ink intake passage portion is formed as a through hole in the first plate member, the second plate member, and the fourth plate member .

In this way, since the cavity unit is configured by laminating plate members having necessary components as the recording head, such as the filter section, the guide passage, the pressure chamber, and the common ink chamber, the structure of the cavity unit Becomes easier.

  Since the present invention is configured as described above, the present invention guides the taken ink through the guide passage portion in the direction of flowing along the lower surface of the filter portion prior to flowing into the filter portion. Since the flow is supplied to the common ink chamber as a flow from the lower side to the upper side, the force can be applied in the direction of dropping the foreign matter, and the clogging of the filter portion can be avoided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The ink jet recording apparatus according to the present embodiment is a well-known ink jet in which a recording head is mounted on a carriage that reciprocates along a recording medium and ink droplets are ejected from the recording head toward the recording medium. Type recording device.

  FIG. 1 is a sectional view of a piezoelectric recording head used in an ink jet recording apparatus according to the present invention, and FIG. 2 is an exploded perspective view of the recording head.

  As shown in FIG. 1, the recording head 1 has a plate-type piezoelectric actuator 3 bonded to the upper side of a cavity unit 2 having a plurality of metal plates, and is connected to an external device on the upper side of the plate-type piezoelectric actuator 3. The flexible flat cable 4 for the above is overlapped and joined.

  As shown in FIG. 1, the cavity unit 2 has a structure in which each of the nine plates 11 to 19 is laminated and bonded with an adhesive in a laminated state. That is, the cavity plate 11 (fourth plate member), the base plate 12, the aperture plate 13, the two manifold plates 14 and 15 (second plate member), and the filter plate 16 (first plate) are stacked in order from the upper side. Plate member), damper plate 17 (third plate member), spacer plate 18 and nozzle plate 19, a total of nine thin plates. The ink is ejected downward from nozzle holes opened on the lower surface side of the cavity unit 2 (that is, only the nozzle holes 19B, 19C, and 19D formed in the nozzle plate 19 are shown). The pressure chambers 11A1, 11A2, 11B, 11C, and 11Da are pressurized by the piezoelectric actuator 3 from above when ejecting ink from the corresponding nozzle holes. Each of the plates 11 to 19 has a thickness of about 50 to 150 μm and is a metal plate made of 42% nickel alloy steel plate.

  In the cavity plate 11, a plurality of elongated pressure chambers 11 </ b> A to 11 </ b> D in plan view are formed as through holes such that the longitudinal direction thereof is along the short side direction of the cavity plate 11 (left-right direction in FIG. 1). ing. The pressure chambers 11 </ b> A to 11 </ b> D are arranged in five rows in a staggered arrangement along the long side direction of the cavity plate 11 (perpendicular to the paper surface of FIG. 1, the X direction of FIG. 2) in plan view. Here, the pressure chambers 11A to 11D are provided in two rows for black and one row for cyan, yellow, and magenta, respectively.

  One end portion of each pressure chamber 11 </ b> A to 11 </ b> D in the longitudinal direction communicates with each nozzle hole of the nozzle plate 19 through the communication path portion 21. The communication path portion 21 is formed as an assembly of through holes provided in each of the seven plates 12 to 18 stacked on the lower side of the cavity plate 11.

  On the other hand, the other ends of the pressure chambers 11A to 11D in the longitudinal direction communicate with common ink chambers 23A1, 23A2, 23B, 23C, and 23D (manifold), which will be described later, through the throttle passage portion 22. The throttle passage portion 22 is formed as an assembly of through holes provided in the two plates 12 and 13 stacked on the lower side of the cavity plate 11, and from the common ink chambers 23A to 23D to the pressure chambers 11A to 11D. When the ink is supplied to the ink, the cross-sectional area is reduced so as to provide a flow path resistance.

  The two manifold plates 14 and 15 are formed with five common ink chambers 23A to 23D penetrating the plate thickness so as to extend along each row of nozzle holes along the long side direction. That is, as shown in FIG. 1, by stacking two manifold plates 14 and 15 and covering the upper surface with the aperture plate 13 and the lower surface with the filter plate 16, a total of five common ink chambers 23A.about. 23D is formed independently. Each of the common ink chambers 23A to 23D overlaps with part of the pressure chambers 11A to 11D when viewed in plan from the stacking direction of the plates 11 to 19 (column direction of the nozzle holes). It extends long along. Here, two common ink chambers 23A to 23D are provided for black, and one each for cyan, yellow, and magenta.

  In addition, a damper chamber 26 is formed in the damper plate 17 as a through hole corresponding to the common ink chambers 23A to 23D. The filter plate 16 sandwiched between the damper plate 17 and the manifold plate 15 has elasticity to bend toward the common ink chambers 23 </ b> A to 23 </ b> D and the damper chamber 26 side at a portion corresponding to the damper chamber 26. is doing. As a result, the pressure wave of the ink propagated to the common ink chambers 23A to 23D due to the ink ejection can be absorbed by the deflection of the filter plate 16, and the pressure wave propagates to the other pressure chambers to affect the ejection. It is possible to prevent so-called crosstalk.

  As shown in FIG. 2, the nozzle plate 19 is provided with a large number of ink ejection nozzle holes having a minute diameter (about 25 μm in this embodiment) at minute intervals. The nozzle holes are arranged along the long side direction (the direction perpendicular to the paper surface of FIG. 1, the X direction of FIG. 2) in the nozzle plate 19 to form a nozzle row.

  On the other hand, the piezoelectric actuator 3 has a structure in which a plurality of piezoelectric sheets 31 are laminated in the same manner as the known one disclosed in JP-A-4-341853, etc., and each piezoelectric sheet has a thickness of about 30 μm. In the upper surface (wide surface) of the even-numbered piezoelectric sheet 31a from the lower side, narrow individual electrodes 32 are provided along the long side direction at locations corresponding to the pressure chambers 11A to 11D in the cavity unit 2. It is formed in a row. A common electrode 33 common to the plurality of pressure chambers 11A to 11D is formed on the upper surface (wide surface) of the odd-numbered piezoelectric sheet 31b from the bottom.

  An adhesive sheet (not shown) made of a non-ink-permeable synthetic resin material as an adhesive is formed on the entire lower surface (the wide surface facing the pressure chambers 111A to 11D) of the plate-type piezoelectric actuator 3 having such a configuration. The piezoelectric actuator 3 is then bonded and fixed to the cavity unit 2 with the individual electrodes 32 corresponding to the pressure chambers 11A to 11D in the cavity unit 2, respectively. A flexible flat cable 4 having a wiring pattern connected to each electrode 32 is fixed to the upper surface of the piezoelectric actuator 3.

  As shown in FIGS. 3 and 4, one end of each common ink chamber 23A to 23D is connected to an ink supply source (not shown) via the ink intake passages 24A to 24D and the guide passages 25A to 25D. Communicate. The downstream ends of the guide passage portions 25A to 25D are communicated with the common ink chambers 23A to 23D through the filter portions 16A to 16D that remove foreign matters contained in the ink. Here, the ink intake passage portion 24A for black is shared by the two guide passages 25A and 25B for black, and the guide passages 25C to 25E for cyan, yellow, and magenta are respectively for one common ink chamber 23A to 23D. Used.

  The ink intake passage portions 24 </ b> A to 24 </ b> D are formed as through holes in the cavity plate 11, the base plate 12, the aperture plate 13, the two manifold plates 14 and 15, and the filter plate 16. The guide passage portions 25A to 25D are formed as through holes in the damper plate 17 in the shape of a long hole in the direction connecting the ink intake passage portions 24A to 24D and the common ink chambers 23A to 23D below the common ink chambers 23A to 23D. Yes. The guide passage portions 25A to 25D are communicated with the upstream end portion at the downstream end portion of the ink intake passage portions 24A to 24D and the downstream end portion with the upstream end portion of the common ink chambers 23A to 23D, respectively. Accordingly, the ink intake passage portions 24A to 24D communicate with the common ink chambers 23A to 23D for each ink color via the guide passage portions 25A to 25D. The guide passage portions 25A to 25D each have a gradually increasing passage cross-sectional area from the upstream side toward the downstream side.

  On the other hand, the filter portions 16A to 16D have a large number of fine portions corresponding to portions where the guide passage portions 25A to 25D and the common ink chambers 23A to 23D overlap the filter plate 16 adjacent to the lower surface of the manifold plate 15. It is partially formed as a filter hole in which an opening is formed. Here, the filter portions 14A to 14D may be partially formed by (i) drilling a large number of fine holes at predetermined positions of the filter plate, or (ii) the holes formed in the filter plate. (Iii) The filter plate may be formed of a plate member having openings at predetermined positions and a plate member having a large number of fine holes perforated throughout. It may be formed by overlapping bonding.

  The ink intake passage portions 24A to 24D flow the ink taken from the ink supply source in the thickness direction of the plates 11 to 19, and in the flow direction in the guide passage portions 25A to 25D with respect to the filter portions 16A to 16D. The ink intake passage portions 24 </ b> A to 24 </ b> D are opposed to the wall surface of the spacer plate 18. As a result, the ink flowing from the ink intake passage portions 24A to 24D collides with the spacer plate 18 and changes the flow direction. Then, the ink is guided by the guide passage portions 25A to 25D in the direction of flowing along the lower surfaces (upstream side surfaces) of the filter portions 14A to 14D prior to the inflow to the filter portions 14A to 14D, and the filter portions 16A to 16D. Is supplied to the common ink chambers 23A to 23D as a flow from the lower side to the upper side.

  According to the recording head, in the ink flow path from the ink intake passage portions 24A to 24D to the nozzle holes, first, ink is supplied from the ink intake passage portions 24A to 24D to the common ink chambers 23A to 23D as ink supply channels. Is done. At this time, the portion of the spacer plate 18 corresponding to the upstream ends of the guide passage portions 25A to 25D functions as a baffle plate that changes the flow direction by the collision of the ink from the ink intake passage portions 24A to 24D. The flow direction is changed and the flow velocity is reduced.

  Then, prior to the inflow to the filter portions 16A to 16D, the guide passage portions 25A to 25D on the upstream side of the filter portions 16A to 16D allow ink to flow along the lower surfaces (upstream side surfaces) of the filter portions 16A to 16D. Since the liquid is guided and supplied to the common ink chambers 23A to 23D as a flow from the lower side to the upper side of the filter parts 16A to 16D, the foreign matter contained in the ink trying to enter the filter parts 16A to 16D is guided by the guide passage part 25A. Are pushed to the downstream end of -25D and force is applied in the direction of falling by gravity (the direction away from the filter unit), so that no foreign matter flows along with the ink in the direction of the filter units 16A-16D. It accumulate | stores on the wall surface of the guide passage parts 25A-25D which oppose. Therefore, clogging of the filter parts 16A to 16D is avoided, and the circulation of the ink is ensured for a long time.

  Thereafter, the ink is distributed and supplied from the common ink chambers 23A to 23D to the pressure chambers 11A to 11D via the throttle passage portion 22. Then, by driving the piezoelectric actuator 3, the ink passes from the pressure chambers 11 </ b> A to 11 </ b> D through the communication path portion 21 to the nozzle holes corresponding to the pressure chambers 11 </ b> A to 11 </ b> D.

  The present invention is not limited to the above embodiment, and can be modified as follows.

  (i) In the above embodiment, the damper plate 17 is simply provided with the guide passage portion. However, as shown in FIG. 5, the damper plate 17 is disposed on the opposite side of the filter plate 16. The spacer plate 18 ′ is formed with a foreign substance reservoir recess 31D corresponding to the filter portion 16D, and the reservoir recess 31D is disposed corresponding to the filter portion 16D with the downstream end portion of the guide passage portion 25D interposed therebetween. It is also possible to accumulate more foreign substances.

  (ii) In the above embodiment, the filter portion is provided corresponding to only one end of the common ink chamber. However, as shown in FIGS. 6 to 8, for example, the filter portion 16D ′ and the guide of the filter plate 16 are provided. The passage portion 25D ′ is formed long along the longitudinal direction of the common ink chamber 23D, and the damper chamber 26D ′ is formed in parallel with both sides of the guide passage portion 25D ′ with a partition wall 27 therebetween. It is also possible.

1 is a sectional view of a piezoelectric recording head used in an ink jet recording apparatus according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the recording head. FIG. 4 is a plan view of the vicinity of an ink intake passage portion of a cavity unit in the recording head. It is sectional drawing in the AA of FIG. It is a figure similar to FIG. 4 about other embodiment. It is a top view of the ink intake passage part vicinity of the cavity unit which is another embodiment. It is sectional drawing in the BB line of FIG. It is sectional drawing in the CC line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recording head 2 Cavity unit 3 Piezoelectric actuator 11 Cavity plate (4th plate member)
11A1, 11A2, 11B, 11C, 11Da Pressure chamber 13 Aperture plate 14, 15 Manifold plate (second plate member)
16 Filter plate (first plate member)
16A1, 16A2, 16B, 16C, 16D Filter part 17 Damper plate (third plate member)
19 Nozzle plate 19B, 19C, 19D Nozzle hole 23A1, 23A2, 23B, 23C, 23D Common ink chamber (manifold)
24A to 24D Ink intake passage portion 25A1, 25A2, 25B, 25C, 25D Guide passage portion

Claims (6)

Ink intake passage portion for taking in ink, filter portion for removing foreign matter contained in the taken-in ink, a plurality of nozzle holes for ejecting ink, a plurality of pressure chambers for supplying ink to the plurality of nozzle holes, and the pressure chamber A cavity unit that includes a common ink chamber that temporarily stores ink to be supplied to the recording medium and that is configured by stacking a plurality of plate members. When the pressure chamber is pressurized, ink is ejected from the nozzle holes to the recording medium. In an ink jet recording apparatus for recording
The cavity unit has a second plate member that forms the common ink chamber extending in the column direction formed by the plurality of pressure chambers on one side of the first plate member in which the filter portion is formed in a part of the cavity unit. Arranged,
A guide that guides the ink taken in from the ink intake passage portion to the other side of the first plate member in a direction in which the ink flows along the lower surface of the filter portion prior to flowing into the filter portion. A third plate member having a passage portion is disposed;
The taken-in ink is supplied to the common ink chamber through the guide passage portion as a flow from the lower side to the upper side of the filter portion ,
The cavity unit further includes a fifth plate member in which a foreign substance accumulation recess is formed corresponding to the filter portion,
The fifth plate member is disposed on the side opposite to the first plate member with respect to the third plate member, and the reservoir recess is disposed corresponding to the filter portion with the guide passage portion interposed therebetween. and has <br/> that the ink jet recording apparatus characterized. The ink take-in passage portion flows the taken-in ink in the thickness direction of the plate member, and is displaced from the filter portion in the flow direction in the guide passage portion,
The guide passage portion is formed as a through hole in the third plate member, and an upstream end portion is communicated with the downstream side of the ink intake passage portion, and a downstream end portion is communicated with the upstream side of the filter portion. 2. An ink jet recording apparatus according to claim 1, wherein: The cavity unit further includes a fourth plate member in which the pressure chamber is formed as a through hole,
The third plate member is located in the lowermost layer, and the fourth plate member is located in the uppermost layer.
The third plate member, the first plate member, the second plate member and the fourth plate member are laminated in that order,
3. The ink jet recording apparatus according to claim 1, wherein the ink intake passage portion is formed as a through hole in the first plate member, the second plate member, and the fourth plate member. Ink intake passage portion for taking in ink, filter portion for removing foreign matter contained in the taken-in ink, a plurality of nozzle holes for ejecting ink, a plurality of pressure chambers for supplying ink to the plurality of nozzle holes, and the pressure chamber A cavity unit that includes a common ink chamber that temporarily stores ink to be supplied to the recording medium and that is configured by stacking a plurality of plate members. When the pressure chamber is pressurized, ink is ejected from the nozzle holes to the recording medium. In an ink jet recording apparatus for recording
The cavity unit has a second plate member that forms the common ink chamber extending in the column direction formed by the plurality of pressure chambers on one side of the first plate member in which the filter portion is formed in a part of the cavity unit. Arranged,
A guide that guides the ink taken in from the ink intake passage portion to the other side of the first plate member in a direction in which the ink flows along the lower surface of the filter portion prior to flowing into the filter portion. A third plate member having a passage portion is disposed;
The taken-in ink is supplied to the common ink chamber through the guide passage portion as a flow from the lower side to the upper side of the filter portion,
In the third plate member, a damper chamber is formed as a through hole or a recess corresponding to the common ink chamber, and the first plate member is sandwiched between the damper chamber and the common ink chamber. The part has elasticity to bend toward the damper chamber and the common ink chamber,
The ink jet recording apparatus, wherein the filter section is formed long along the common ink chamber, and the damper chamber is formed in parallel with the filter section. The ink take-in passage portion flows the taken-in ink in the thickness direction of the plate member, and is displaced from the filter portion in the flow direction in the guide passage portion,
The guide passage portion is formed as a through hole in the third plate member, and an upstream end portion is communicated with the downstream side of the ink intake passage portion, and a downstream end portion is communicated with the upstream side of the filter portion. The ink jet recording apparatus according to claim 4 . The cavity unit further includes a fourth plate member in which the pressure chamber is formed as a through hole,
The third plate member is located in the lowermost layer, and the fourth plate member is located in the uppermost layer.
The third plate member, the first plate member, the second plate member and the fourth plate member are laminated in that order,
6. The ink jet recording apparatus according to claim 4 , wherein the ink intake passage portion is formed as a through hole in the first plate member, the second plate member, and the fourth plate member .

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