JP2007076093A - Ink jet recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent such a phenomenon as a small hole of a filter spreads or the filter is broken even if a pressure acts on the filter during purge. <P>SOLUTION: Ink take-in holes 24A-24D are formed in a cavity plate 11 as through-holes penetrating the plates 11-18 in the laminating direction and connected with one end of common ink chambers 23A-23D. Filters 16A-16D are provided on the upper side of the cavity plate 11 in correspondence with its ink take-in holes 24A-24D. Portions 26A-26D for supporting the filters 16A-16D by touching the surface thereof on the side opposite to the ink inflow side are formed on the cavity plate 11 to project inward from the inner circumferential wall face of the ink take-in holes 24A-24D. Auxiliary supporting portions 27A-27D for supporting the filter supporting portions 26A-26D are formed on a base plate 12 laminated on the underside of the cavity plate. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an ink jet recording apparatus.

  2. Description of the Related Art Conventionally, in an ink jet recording apparatus, in order to remove foreign matter contained in ink, a filter unit for removing foreign matter is generally provided in the middle of an ink flow path (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).
JP 2002-137386 A (FIG. 7) JP 2003-319551 A (paragraph 0061 and FIG. 6)

  The filter portions described in Patent Documents 1 and 2 described above are arranged orthogonal to the ink flow direction, and only the outer peripheral portion supports the filter portion, so that, for example, bubbles in the ink flow path are removed. Therefore, a so-called purge operation that sucks ink from the nozzle side or supplies ink at a high pressure from the ink supply source side causes the high pressure of the ink to act on the filter, causing the filter unit to warp, and as a result, the filter unit There is a possibility that a phenomenon that the small holes of the filter expand and a phenomenon that the filter part breaks may occur.

  When these phenomena occur, large foreign matters that should be trapped in the filter section may pass through the filter section and enter the ink flow path, thereby blocking the nozzle.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an ink jet recording apparatus that can prevent a phenomenon that a small hole of a filter part expands and a phenomenon that the filter part breaks even if pressure acts on the filter part during purging.

  According to the first aspect of the present invention, an ink intake hole portion that takes in ink, a filter portion that removes foreign matters contained in the ink, a plurality of nozzle holes that eject ink, and a plurality of pressure chambers that supply ink to the plurality of nozzle holes And a cavity unit that includes a common ink chamber that temporarily stores ink to be supplied to the pressure chamber and is configured by stacking a plurality of plate members, and the nozzle hole is formed in the recording medium by pressurizing the pressure chamber. In the ink jet recording apparatus for recording by ejecting more ink, the cavity unit has the ink intake hole portion formed as a through hole penetrating the plate member in the stacking direction and connected to one end of the common ink chamber. Corresponding to the ink intake hole on one side of the first plate member in which the ink intake hole is formed. A filter unit is disposed, and the ink flows in a direction orthogonal to the filter unit, and protrudes inward from an inner peripheral wall surface of the ink intake hole to the first plate member, A filter support portion for supporting the filter portion by contacting a surface of the filter portion opposite to the ink inflow side is formed.

  If it does in this way, it will protrude inward from the inner peripheral wall surface of an ink taking-in hole part to a 1st plate member, and will contact the surface on the opposite side to the ink inflow side of a filter part, and the said filter part will be made Since the filter support part to support is formed, even if pressure acts on the filter part at the time of purging, the deformation of the filter part is suppressed by the support by the filter support part, and the phenomenon that the small hole of the filter part spreads or the filter part The phenomenon of breaking is prevented. In particular, since the filter support part for supporting the filter part is formed by effectively using the first plate member constituting the cavity unit of the laminated structure, it is not necessary to provide any special parts, and the filter support part Easy to configure.

  According to a second aspect of the present invention, in the ink jet recording apparatus according to the first aspect, the second plate member stacked on the other side of the first plate member is provided with an ink intake hole portion of the first plate member. A through hole is formed as the ink intake hole to connect one end of the common ink chamber, and the second plate member projects inward from the inner peripheral wall surface of the through hole, and the filter support portion An auxiliary support part is formed to support the structure. Here, the auxiliary support part is only required to support the filter support part, and may have the same shape as the filter support part or may have a different shape.

  If it does in this way, it will become possible to form easily the auxiliary support part which raises the support rigidity of a filter support part effectively using the 2nd plate member laminated on the 1st plate member.

According to a third aspect of the present invention, in the ink jet recording apparatus according to the second aspect, the first plate member has the ink intake hole portion formed as a through hole and the pressure chamber formed as a through hole. A third plate member in which the common ink chamber is formed as a through hole is disposed on the opposite side of the second plate member from the first plate member.
A communication hole for communicating the pressure chamber and the common ink chamber is formed in the second plate member.

  In this case, the cavity unit is configured by laminating plate members having components necessary as a recording head, such as an ink intake hole, a pressure chamber, and a common ink chamber, so that the structure is simple.

  According to a fourth aspect of the present invention, in the ink jet recording apparatus according to any one of the first to third aspects, the pressure chambers are formed in a plurality of rows, and the plurality of common ink chambers are formed corresponding to the rows of the pressure chambers. One end of at least two of the plurality of common ink chambers is lined up through the partition wall and connected to one of the ink intake holes, and ink is interposed between the filter support and the partition wall. A gap that can be circulated is formed.

  In this way, since a gap through which ink can flow is formed between the filter support portion and the partition wall portion, the ink that has passed through the filter portion flows into the common ink chamber through the gap. The distribution of ink is not impaired.

  According to a fifth aspect of the present invention, in the ink jet recording apparatus according to the second or third aspect, the pressure chambers are formed in a plurality of rows, the plurality of common ink chambers are formed corresponding to the pressure chamber rows, and the plurality of common ink chambers are formed. One end of at least two of the ink chambers is lined up through a partition wall and connected to one of the ink intake holes, and the filter support is supported by the partition through the auxiliary support It is characterized by being.

  In this case, the filter support portion is supported by the partition wall portion via the auxiliary support portion, so that the support rigidity is improved.

  According to a sixth aspect of the invention, in the ink jet recording apparatus of the fourth or fifth aspect, the filter support portion is formed in a direction intersecting the partition wall portion.

  In this case, since the filter support portion and the partition wall portion of the common ink chamber intersect, the ink that has passed through the filter portion flows along the side surface of the filter support portion, and the partition wall portion of the common ink chamber And flow into the common ink chamber along the side surface.

  According to a seventh aspect of the present invention, in the ink jet recording apparatus according to any one of the first to sixth aspects, the filter support portion includes a first portion that supports the center of the filter portion, and the first portion is the first portion. And a second portion connected to the inner peripheral wall of the ink intake hole.

  In this way, the first portion that supports the central portion of the filter portion that is susceptible to pressure is connected to the inner peripheral wall of the ink intake hole portion via the second portion, so that the support of the first portion is stable. To do.

  The invention according to an eighth aspect is the ink jet recording apparatus according to any one of the first to sixth aspects, wherein the filter support portion protrudes from an inner peripheral wall of the ink intake hole portion toward a center portion, and a peripheral portion of the filter portion is formed. It has at least 1 protrusion part to support, It is characterized by the above-mentioned.

  In this case, the filter portion can be supported with a simple configuration in which a protruding portion that protrudes from the inner peripheral wall of the ink intake hole portion toward the center portion is provided.

  With the configuration as described above, the present invention protrudes inward from the inner peripheral wall surface of the ink intake hole and supports the filter unit by contacting the surface of the filter unit opposite to the ink inflow side. Since the filter support portion is formed on the first plate member, even if pressure acts on the filter portion during purging, the filter support portion supports the deformation of the filter portion, and the small holes in the filter portion are formed. It is possible to prevent the phenomenon of spreading and the phenomenon of breaking the filter part.

  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 eight plates 11 to 18 is laminated and bonded with an adhesive in a laminated state. That is, the cavity plate 11 (first plate member), the base plate 12 (second plate member), the aperture plate 13, two manifold plates 14 and 15 (third plate member), which are stacked in order from the upper side, The damper plate 16, the spacer plate 17, and the nozzle plate 18 are composed of a total of eight thin plates. Then, ink is ejected downward from nozzle holes opened on the lower surface side of the cavity unit 2 (that is, nozzle holes 18A to 18D formed in the nozzle plate 18). 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 18A1, 18A2, 18B, 18C, and 18D. Each of the plates 11 to 18 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 11A to 11D in the longitudinal direction communicates with each nozzle hole 18A to 18D of the nozzle plate 18 through the communication path portion 21. The communication path portion 21 is formed as an assembly of through holes provided in each of the six plates 12 to 17 stacked below 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, 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 the rows of the nozzle holes 18A to 18D along the long side direction. ing. 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 a part of the corresponding pressure chamber 11A to 11D when viewed in plan from the stacking direction of the plates 11 to 18 (nozzle holes 18A to 18A). 18D in the column direction). Here, two common ink chambers 23A to 23D are provided for black, and one each for cyan, yellow, and magenta.

  In addition, the damper plates 16 are formed in the damper plate 16 in a concave shape corresponding to the common ink chambers 23A to 23D from the opposite side, leaving a thin portion on the common ink chambers 23A to 23D side. Has been. Along with the ink ejection operation in the pressure chamber, the pressure wave of the ink propagating from the pressure chamber to the common ink chamber via the throttle passage portion 22 is absorbed by the thin portion of the damper plate 16 being bent, and the other pressure Prevents so-called crosstalk that affects the room.

  As shown in FIG. 2, the nozzle plate 18 is provided with a large number of ink ejection nozzle holes 18A to 18D having a minute diameter (about 25 μm in this embodiment) at minute intervals. The nozzle holes 18A to 18D 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 18 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 4A and 4B, one end of each common ink chamber 23A-23D communicates with an ink supply source (not shown) via ink intake holes 24A-24D. Yes. At the upstream opening ends of the ink intake holes 24A to 24D, filter parts 25A to 25D are provided to remove foreign matters contained in the taken ink, and the ink flows in a direction orthogonal to the filter parts 25A to 25E. It is configured. The ink intake holes 24 </ b> A to 24 </ b> D flow the intake ink in the thickness direction of the plates 11 to 18.

  Specifically, the ink intake holes 24A to 24D are formed in the cavity plate 11, the base plate 12 and the aperture plate 13 as through holes penetrating in the stacking direction of the plates 11 to 18, and are one end of the common ink chambers 23A to 23D. The filter portions 25A to 25D are arranged on the upper side (one side) of the uppermost cavity plate 11 where the ink intake holes 24A to 24D are formed, corresponding to the ink intake holes 24A to 24D. Yes.

  Each of the plurality of filter portions 25A to 25D has a large number of fine filter holes, and is formed as a single sheet-like filter member 25 that is connected to each other by a non-perforated frame portion surrounding the outer peripheral portion thereof. . The filter member is formed by integrally forming the filter portions 25A to 25D and the frame portion with a thin metal by electroforming, or by forming fine filter holes of the filter portions 25A to 25D in a thin resin film. The The filter member 25 is fixed to the upper surface of the cavity plate 11 by bonding or the like at the frame portion.

  As shown in FIG. 4B, the cavity plate 11 protrudes inward from the inner peripheral wall surfaces of the ink intake holes 24A to 24D, and is opposite to the ink inflow side of the filter portions 25A to 25D. Are formed in the direction in which the common ink chambers 23 </ b> A to 23 </ b> D extend. The filter support portions 26 </ b> A to 26 </ b> D are stretched in the diameter direction at the ink intake holes 24 </ b> A to 24 </ b> D formed in the cavity plate 11.

  The ink intake holes 24A to 24A connect the ink intake holes 24A to 24D of the cavity plate 11 and one ends of the common ink chambers 23A to 23D to the base plate 12 stacked on the other side (lower side) of the cavity plate 11. A through hole as 24D is formed. The base plate 12 is formed with auxiliary support portions 27A to 27D that protrude inward from the inner peripheral wall surface of the through hole and support the filter support portions 26A to 26D.

  One end of the two common ink chambers 23A1 and 23A2 for black ink among the plurality of common ink chambers 23A to 23D is aligned with the partition wall portions 14a and 15a and connected to one ink intake hole portion 24A. A gap S through which ink can flow is formed between the auxiliary support portion 27A and the partition wall portion 14a.

  According to the recording head, in the ink flow path from the ink intake holes 24A to 24D to the nozzle holes 18A to 18D, first, the ink is supplied from the ink intake holes 24A to 24D to the common ink chambers 23A to 23D as ink supply channels. 23D. At this time, the filter portions 25A to 25D receive pressure during purging and attempt to bend into the ink intake hole portion, but are supported by the filter support portions 26A to 26D and the auxiliary support portions 27A to 27D. The deformation of the filter units 14A to 14D is suppressed.

  The black ink flows from one filter unit 25A to the two common ink chambers 23A1 and 23A2. However, even if foreign matter concentrates on one side of the filter unit 25A divided by the filter support unit 26A, the black ink is supported. Ink can be supplied to both the common ink chambers 23A1 and 23A2 through the gap S between the support portion 27 and the partition wall portion 14a without any trouble.

  Thereafter, the ink is distributed and supplied from the common ink chambers 23 </ b> A to 23 </ b> D to the pressure chambers 11 </ b> A to 11 </ b> D via the throttle passage portion 22. 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 18 </ b> A to 18 </ b> D corresponding to the pressure chambers 11 </ b> A to 11 </ b> D.

  In this way, even when pressure acts on the filter parts 25A to 25D during the purge, the filter parts 25A to 25D are suppressed from being deformed by the support by the filter support parts 26A to 26D and the auxiliary support parts 27A to 27D. It is possible to prevent the phenomenon that the small holes (filter holes) of 25A to 25D are spread and the filter part is broken.

  In addition to the embodiment described above, the present invention can be modified as follows.

  (i) In the above embodiment, auxiliary support portions 27A to 27D for supporting the filter support portions 26A to 26D are provided. However, the present invention is not limited thereto, and the filter portions 14A to 14D are supported. However, when it is sufficient to support only the filter support portions 26A to 26D, a part or all of the auxiliary support portions 27A to 27D can be omitted. When this auxiliary support portion is omitted, a gap is formed between the filter support portion and the partition wall portions of the common ink chambers 23A to 23D.

  (ii) In the above embodiment, the linear filter support portion that supports the filter portion is formed in the direction in which the common ink chamber (manifold) extends, but the present invention is not limited thereto. A configuration extending in a direction intersecting with the direction in which the common ink chamber extends may be employed. For example, as shown in FIGS. 5 and 6, the filter support portion 26 </ b> A ′ that supports the filter portion 25 </ b> A can be formed in a direction orthogonal to the extending direction of the common ink chambers 23 </ b> A <b> 1 and 23 </ b> A <b> 2. In addition, it can be set as the same shape also about the filter support part about the other filter parts 25B-25C. In this case, in the black ink filter portion 25A, not only the filter support portion 26A ′ but also the auxiliary support portions 27A and 28A of the ink intake portion 24A of the base plate 12 and the aperture plate 13 are provided between the common ink chambers 23A1 and 23A2. The partition walls 14a and 15a intersect with each other in plan view, and the ink intake hole portion for any portion of the filter portion divided into two with the filter support portion interposed therebetween is communicated with the common ink chambers 23A1 and 23A2. Therefore, even if a part of the filter unit is clogged, the distribution to the common ink chamber is ensured. Further, in this case, the lowermost auxiliary support portion 28A is in contact with the partition wall 14a, so that the filter portion 25A is separated by the partition walls 14a and 15a via the filter support portion 26A ′ and the auxiliary support portions 27A and 28A. Can be supported. In the case where ink is supplied to the two rows of pressure chambers 11A1 and 11A2 by one filter unit 25A, the amount of ink supplied is larger than that supplied to one row of pressure chambers as in the other filter units. Therefore, the filter area is increased and the filter is easily deformed by the pressure at the time of purging. By supporting the filter portion 25A as described above, it can be supported with sufficient strength even if the filter area is increased.

  It is also possible to combine a portion extending in the extending direction of the common ink chamber (manifold) and a portion intersecting with the portion in a cross shape.

  (iii) The shape of the filter support portion can be configured as shown in FIGS. 7A to 7C in addition to those described above. That is, as shown in FIG. 7A, the filter support 126 may have a structure having three linear portions 126B extending from the central portion 126A toward the inner peripheral wall of the ink intake hole 124. As shown in (b), the filter support 127 may have a structure having three protrusions 127A that protrude from the inner peripheral wall of the ink intake hole 124 toward the center and support the peripheral edge of the filter (this is shown in FIG. In this case, at least one protrusion is sufficient). Further, as shown in FIG. 7C, the filter support portion 128 connects the annular first portion 126A that supports the center of the filter portion, and the first portion to the inner peripheral wall of the ink intake hole portion 124. It is also possible to adopt a structure having a straight second portion 126B.

  (iv) In the above embodiment, the case where the filter member is provided on the upper side of the cavity plate 11 has been described. However, the present invention is not limited thereto, and the plate member of the cavity unit is not limited thereto. The present invention can also be applied to a filter plate in which a filter portion is formed on one sheet. In that case, the plate member laminated on the downstream side of the filter plate becomes the first plate member on which the filter support portion is formed. The filter plate may be (a) a part formed by drilling a large number of fine holes at predetermined positions of the plate member, or (b) the holes formed in the plate member. It may be formed by fitting a filter member, or (c) a plate member in which openings are formed at predetermined positions and a plate member in which a large number of fine holes are perforated are overlapped and joined. It may be formed by.

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 hole of a cavity unit in the recording head. (A) is sectional drawing in the AA line of FIG. 3, (b) is sectional drawing in the BB line of FIG. It is a top view of the ink intake hole vicinity of the cavity unit which is other embodiment. It is sectional drawing in the CC line of FIG. (A)-(c) is explanatory drawing of the modification of a filter support part, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recording head 2 Cavity unit 3 Piezoelectric actuator 13 Aperture plate 14, 15 Manifold plate 16A-16D Filter part 18 Nozzle plate 18A-18D Nozzle hole 23A-23D Common ink chamber (manifold)
24A-24D Ink intake hole 26A-26D Filter support 27A-27D Auxiliary support

Claims (8)

An ink intake hole portion that takes in ink, a filter portion that removes foreign matters contained in the ink, a plurality of nozzle holes that eject ink, a plurality of pressure chambers that supply ink to the plurality of nozzle holes, and a pressure chamber that supplies the pressure chambers A cavity unit including a common ink chamber for temporarily storing ink and including a stack of a plurality of plate members is provided, and recording is performed by ejecting ink from the nozzle holes to the recording medium when the pressure chamber is pressurized. In the ink jet recording apparatus,
In the cavity unit, the ink intake hole is formed as a through hole penetrating the plate member in the stacking direction, connected to one end of the common ink chamber, and the ink intake hole is formed. A filter unit is disposed on one side of the plate member corresponding to the ink intake hole, and the ink flows in a direction orthogonal to the filter unit.
A filter that protrudes inwardly from the inner peripheral wall surface of the ink intake hole portion to the first plate member and contacts the surface of the filter portion opposite to the ink inflow side to support the filter portion. An ink jet recording apparatus having a support portion formed thereon. As the ink intake hole portion connecting the ink intake hole portion of the first plate member and one end of the common ink chamber to the second plate member laminated on the other side of the first plate member. A through hole is formed,
The inkjet type according to claim 1, wherein the second plate member is formed with an auxiliary support portion that protrudes inward from an inner peripheral wall surface of the through hole and supports the filter support portion. Recording device. In the first plate member, the ink intake hole is formed as a through hole, and the pressure chamber is formed as a through hole.
A third plate member in which the common ink chamber is formed as a through hole is disposed on the opposite side of the second plate member from the first plate member.
3. The ink jet recording apparatus according to claim 2, wherein a communication hole for communicating the pressure chamber and the common ink chamber is formed in the second plate member. The pressure chambers are formed in a plurality of rows, a plurality of the common ink chambers are formed corresponding to the rows of the pressure chambers, and at least two ends of the plurality of common ink chambers are arranged with a partition wall portion therebetween. Connected to one of the ink intake holes,
The ink jet recording apparatus according to claim 1, wherein a gap through which ink can flow is formed between the filter support portion and the partition wall portion. The pressure chambers are formed in a plurality of rows, a plurality of the common ink chambers are formed corresponding to the rows of the pressure chambers, and at least two ends of the plurality of common ink chambers are arranged with a partition wall portion therebetween. Connected to one of the ink intake holes,
4. The ink jet recording apparatus according to claim 2, wherein the filter support part is supported by the partition wall part via the auxiliary support part.   6. The ink jet recording apparatus according to claim 4, wherein the filter support portion is formed in a direction intersecting with the partition wall portion.   The filter support portion includes a first portion that supports the center of the filter portion, and a second portion that connects the first portion to the inner peripheral wall of the ink intake hole portion. Item 7. The ink jet recording apparatus according to any one of Items 1 to 6. The said filter support part has at least 1 protrusion part which protrudes toward the center part from the inner peripheral wall of the said ink taking-in hole part, and supports the peripheral part of the said filter part. 2. An ink jet recording apparatus according to 1.

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