JP2009137082A - Liquid jet head and image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To form a common liquid chamber in such shape that the height of a short head part is made small and air bubbles are prevented from being accumulated in the common liquid chamber when a line type head is constituted by arranging a plurality of short heads. <P>SOLUTION: A plurality of head parts 11 are integrated with a base member 1. The plurality of head parts 11 are respectively provided with a first common liquid chamber portion 3A which constitutes the common liquid chamber 3 supplying ink to respective individual liquid chambers corresponding to a plurality of nozzles for jetting liquid droplets, and an actuator means which generates energy for pressing the liquid in the individual chamber. The base member 1 is provided with a second common liquid chamber portion 3B which is to be combined with the first common liquid chamber portion 3A of the head part 11 so as to constitute the common liquid chamber 3, and then the first common liquid chamber portion 3A of the head part 11 is provided with a straightening part 6 which straightens the flow of liquid flowing from a flow path communicating with the second common liquid chamber portion 3B of the base member 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid discharge head and an image forming apparatus.

  As an image forming apparatus such as a printer, a facsimile machine, a copying apparatus, a plotter, and a complex machine of these, for example, an ink jet recording apparatus is known as an image forming apparatus of a liquid discharge recording method using a recording head for discharging ink droplets. . This liquid discharge recording type image forming apparatus means that ink droplets are transported from a recording head (not limited to paper, including OHP, and can be attached to ink droplets and other liquids). Yes, it is also ejected onto a recording medium or a recording medium, recording paper, recording paper, etc.) to form an image (recording, printing, printing, and printing are also used synonymously). And a serial type image forming apparatus that forms an image by ejecting liquid droplets while the recording head moves in the main scanning direction, and a line type head that forms images by ejecting liquid droplets without moving the recording head There are line type image forming apparatuses using

  In the present application, “image forming apparatus” means an apparatus that forms an image by discharging liquid onto a medium such as paper, thread, fiber, fabric, leather, metal, plastic, glass, wood, ceramics, etc. "Image formation" is not only the application of images with meanings such as characters and figures to the medium, but also the addition of images with no meaning such as patterns to the medium (simply applying droplets to the medium) Also means landing). The “ink” is not limited to the ink, but is used as a general term for all liquids that can perform image formation, such as a recording liquid, a fixing processing liquid, and a liquid.

Conventionally, as a line-type liquid discharge head, Patent Document 1 discloses that a long head is configured by detachably combining a plurality of short heads to enable high-speed discharge, simplification of the structure, improvement in yield, and maintainability. In order to improve the quality, a droplet discharge head configured as a long head by incorporating a plurality of short head modules having discharge ports (nozzles) for discharging droplets into the base substrate, A common supply channel for supplying a liquid to each short head module and a positioning mechanism for detachably attaching each short head module to the base substrate are described. ing.
JP 2005-329595 A

Japanese Patent Application Laid-Open No. 2004-151867 discloses that the amount of ink supplied to a plurality of head units is made uniform during the purge operation, and the air pump is used to keep the discharge performance good without consuming ink wastefully. Ink is pumped to the circulation forward path, and the ink is supplied to a plurality of head units arranged in parallel through a plurality of supply paths, and the ink is discharged from a large number of nozzles together with bubbles and solids, and the remaining ink Is recovered through the circulation return path and then into the sub tank through a plurality of discharge paths.
Japanese Patent No. 3794165

In addition, as a structure of a common liquid chamber, there exists a thing of patent document 3, for example.
JP 2005-131791 A

  As described above, when a line-type head is configured by arranging a plurality of short heads, as described in Patent Document 2 described above, ink circulation is performed by pumping ink from the supply path and discharging it from the discharge path. Alternatively, it is necessary to discharge foreign matter and bubbles mixed in the ink flow path by sucking and discharging ink from the nozzles by the maintenance and recovery mechanism of each head section, but the ink flow rate in the ink flow path in the head section is almost the same. If there is zero or a relatively small region (stagnation region) as compared with other regions, there is a problem that solids and bubbles stay there and it is difficult to completely remove the solids and bubbles.

  Therefore, conventionally, in the liquid discharge head, both ends of the common liquid chamber for supplying ink to each individual liquid chamber to which the nozzle communicates are formed in an R shape so that the ink flow velocity near the end of the common liquid chamber is reduced. An arrangement is made to ensure that bubbles do not stay.

  By the way, when a line type head is configured by assembling a plurality of short heads to a base member (head holding member), the short head has a head configuration that functions independently including a nozzle, individual liquid chambers, and a common liquid chamber. However, if the common liquid chamber is formed on the base member side, there is an advantage that the height of the head portion can be reduced.

  However, if an attempt is made to form a common liquid chamber on the base member side in this way, the end portion of the common liquid chamber has an R shape, particularly when the base member is formed by resin molding in order to reduce the cost of the base member. There is a problem that it is difficult to form.

  The present invention has been made in view of the above problems, and enables the common liquid chamber to be formed in a shape capable of reducing the height of the short head portion and preventing retention of bubbles and the like in the common liquid chamber. For the purpose.

In order to solve the above-described problem, a liquid discharge head according to the present invention includes:
A plurality of head parts are integrated with the base member,
The plurality of head portions pressurize the liquid in the individual liquid chamber, and a first common liquid chamber portion that constitutes a common liquid chamber that supplies liquid to each individual liquid chamber corresponding to the plurality of nozzles that discharge droplets. Actuator means for generating energy, and
The base member is provided with a second common liquid chamber portion that forms the common liquid chamber together with the first common liquid chamber portion of the head portion,
The first common liquid chamber part of the head part is provided with a rectifying part for adjusting the flow of the liquid flowing in from the flow path communicating with the second common liquid chamber part of the base member.

  Here, the rectifying unit of the head unit may be provided at a position facing a liquid supply port that supplies a liquid to the second common liquid chamber portion of the base member. Moreover, the said rectification | straightening part of the said head part can be set as the structure which is a taper shape or R shape. In addition, an opening including the second common liquid chamber portion of the base member may be larger than the head portion, and a part of the head portion may be fitted into the opening. Further, the height of the second common liquid chamber portion of the base member in the direction perpendicular to the liquid flow direction is higher than the height of the head portion in the direction perpendicular to the liquid flow direction of the first common liquid chamber portion. And can.

  The image forming apparatus according to the present invention includes a recording head including the liquid discharge head according to the present invention.

  According to the liquid ejection head of the present invention, the plurality of head portions are provided with the first common liquid chamber portion constituting the common liquid chamber communicating with the individual liquid chambers, and the base member has the first common liquid chamber of the head portion. A second common liquid chamber portion that is combined with the chamber portion to form a common liquid chamber, and the liquid flowing into the first common liquid chamber portion of the head portion from a flow path communicating with the second common liquid chamber portion of the base member Therefore, the common liquid chamber can be formed in a shape that can reduce the height of the short head portion and prevent the retention of bubbles and the like in the common liquid chamber.

  According to the image forming apparatus of the present invention, since the liquid ejection head according to the present invention is provided as a recording head, a high-quality image can be stably recorded at high speed.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. A first embodiment of a liquid discharge head according to the present invention will be described with reference to FIGS. 1 is an explanatory plan view seen from the nozzle surface side of the head, FIG. 2 is an explanatory plan view seen from the base member side, and FIG. 3 is an explanatory sectional view taken along the line AA in FIG. 4 is a cross-sectional explanatory view of the state before the head portion is joined to the base member. The head portion is shown in a schematic cross section (the same applies hereinafter).

  In this liquid discharge head, a plurality (four in this case) of head portions 11 are integrally arranged in two rows arranged in a staggered manner in the base member 1. That is, an integrated head is configured by joining a plurality of head portions 11 to the base member 1.

  The plurality of head portions 11 includes a nozzle plate 13 in which a plurality of nozzles 12 for discharging droplets are formed, a flow path member 14 that forms an individual liquid chamber corresponding to each nozzle 12, and one wall surface of each individual liquid chamber A common liquid chamber member 16 forming a first common liquid chamber portion 3A constituting the common liquid chamber 3 for supplying ink to each individual liquid chamber, and not shown, Actuator means for generating energy for pressurizing ink (a piezoelectric element for deforming the diaphragm in this head portion) and a nozzle cover 17 covering the outer surface are provided.

  The base member 1 is formed by resin molding, and is provided with a second common liquid chamber portion 3B that constitutes the common liquid chamber 3 together with the first common liquid chamber portion 3A of the head portion 11, and the length of the common liquid chamber 3 is long. Ink flow paths 4 and 5 communicating with the common liquid chamber 3 are formed corresponding to both ends in the direction.

  Further, rectifying sections 6 for adjusting the flow of ink flowing from the second common liquid chamber portion 3B side of the base member 1 are provided at both longitudinal ends of the first common liquid chamber portion 3A of the head portion 11. The rectifying unit 6 is provided at a position facing the ink flow paths 4 and 5 of the base member 1.

  Thus, in this liquid discharge head, since the rectifying unit 6 is provided in the first common liquid chamber portion 3A of the head unit 11, the ink flow velocity is almost zero or a region (smaller than other regions) ( (Stagnation region) can be eliminated.

  That is, as shown in an enlarged view in FIG. 5, when ink is supplied from the ink flow path 4, flows through the common liquid chamber 3 and is discharged from the ink flow path 5, the flow of ink flowing from the ink flow path 4 is The flow of the ink flowing out from the common liquid chamber 3 to the ink flow path 5 is smoothly bent from the common liquid chamber 3 to the ink flow path 5 side. As a result, there is no portion where the ink flow rate is extremely reduced at both ends of the common liquid chamber 3 in the longitudinal direction, and the discharge of bubbles and the like is improved.

  On the other hand, as shown in FIG. 6, in the comparative example in which the rectifying unit 6 is not provided at the corners facing the ink flow paths 4 and 5 of the common liquid chamber 3, the ink flow velocity is extremely slow at the corners. If a stagnation region 102 is generated and bubbles enter the stagnation region 102, the bubbles cannot be discharged by the flow of ink. In the comparative example of FIG. 6, the entire common liquid chamber 3 is formed on the base member 1 side. However, when the entire common liquid chamber 3 is formed on the head portion 11 side, or as in the present embodiment, the common liquid chamber 3 is formed. In any case where the chamber 3 is assigned to the base member 1 and the head portion 11, the stagnation region 102 is similarly generated unless the rectifying portion 6 is provided at the corner portion.

  In this liquid discharge head, the first and second common liquid chamber portions 3A and 3B to which the common liquid chamber 3 for supplying ink to the individual liquid chambers of the head portion 11 belongs to the head portion 11 and the base member 1 belong. Since the height (thickness) of the head portion 11 can be reduced, and the rectifying portion 6 described above is provided in the first common liquid chamber portion 3A of the head portion 11, the base member 1 is easily formed.

  That is, as described above, when the common liquid chamber having the rectifying portion on the end side is made of a molded product of the resin member, when the entire common liquid chamber is formed on the base member, as shown in FIG. Molding is performed using the top dies 301, 302, and 303. In this case, after the base member 1 is molded as shown in FIG. 6A, for example, as shown in FIGS. 5B, 3C, and 3D, for example, three types of top molds 301, 302, 303 are sequentially removed. However, when a plurality of top dies are used as described above, resin enters the joint between the top dies and the top dies, so that the top dies are shown in FIGS. A burr 304 is generated at the joint between the molds 302 and 303 and at the joint between 303 and 304. The burr 403 becomes a factor that disturbs the ink flow in the common liquid chamber 3 and a cause of generation of solid matter, and is liable to cause a droplet ejection failure.

  On the other hand, in the head according to the above embodiment, it is not necessary to provide the rectifying unit 6 in the second common liquid chamber portion 3B of the base member 1, and therefore, it can be molded without using a top die. By providing the rectifying unit 6 in the first common liquid chamber portion 3A of the head unit 11 without disturbing the flow of ink or causing burrs that cause generation of solid matter, a desired liquid chamber 3 is provided. The rectifying unit structure can be formed.

  Next, a second embodiment of the liquid ejection head according to the present invention will be described with reference to FIGS. 8 is an explanatory plan view seen from the nozzle surface side of the head, FIG. 9 is an explanatory plan view seen from the base member side, and FIG. 10 is an explanatory sectional view taken along line BB in FIG. 11 is a sectional explanatory view taken along the line CC of FIG. 9, and FIG. 12 is a sectional explanatory view corresponding to FIG. 11 in a state before the head portion is joined to the base member.

  In this liquid discharge head, a plurality of head portions 11 are arranged in a staggered manner and integrated into a base member 1. That is, an integrated head is configured by joining a plurality of head portions 11 to the base member 1.

  The plurality of head portions 11 includes a nozzle plate 13 in which a plurality of nozzles 12 for discharging droplets are formed, a flow path member 14 that forms an individual liquid chamber corresponding to each nozzle 12, and one wall surface of each individual liquid chamber And a first common liquid chamber portion 3A constituting the common liquid chamber 3 for supplying ink to each individual liquid chamber, and although not shown, energy for pressurizing the ink in the individual liquid chamber is generated. Actuator means (a piezoelectric element that deforms the diaphragm in this head portion) and a nozzle cover 16 that covers the outer surface are provided.

  The base member 1 is formed by resin molding, is provided with a second common liquid chamber portion 3B that constitutes the common liquid chamber 3 together with the first common liquid chamber portion 3A of the head portion 11, and is short of the common liquid chamber 3. Ink flow paths 4 and 4 that lead to the common liquid chamber 3 are formed corresponding to both ends in the hand direction.

  A rectifying unit 6 for adjusting the flow of ink flowing from the second common liquid chamber portion 3B side of the base member 1 is provided at the outer end of the first common liquid chamber portion 3A of the head portion 11 in the short direction. ing.

  In this liquid ejection head, since there is one ink flow path 4 communicating with the common liquid chamber 3, bubbles and the like are discharged by sucking ink from the nozzles 12 by a maintenance / recovery mechanism (not shown).

  Also in this liquid discharge head, the first and second common liquid chamber portions 3A and 3B to which the common liquid chamber 3 for supplying ink to the individual liquid chambers of the head portion 11 belongs to the head portion 11 and the base member 1 belong. Since the height (thickness) of the head portion 11 can be reduced, and the rectifying portion 6 described above is provided in the first common liquid chamber portion 3A of the head portion 11, the base member 1 is easily formed. Further, as shown in FIG. 13, since the rectifying unit 6 is formed, the ink flow 100 that has flowed into the common liquid chamber 3 from the ink flow path 4 is smoothly bent toward the individual liquid chamber side, thereby causing a stagnation region. Eliminates bubbles and improves the discharge of bubbles.

Here, different examples of the rectifying unit 6 will be described with reference to a cross-sectional explanatory diagram shown in FIG.
14A shows an example of a structure in which the rectifying unit 6 has a tapered shape, FIG. 14B shows an example in which the rectifying unit 6 has a two-step tapered structure, and FIG. 14C shows an example in which the rectifying unit 6 has an R-shaped structure. It is an example of a structure.

Next, a third embodiment of the liquid ejection head according to the present invention will be described with reference to FIGS. FIG. 15 is a cross-sectional explanatory view of the head, and FIG. 16 is a cross-sectional explanatory view showing the state before the head portion is incorporated into the base member.
Here, the opening 7 including the second common liquid chamber portion 3 </ b> A of the base member 1 is larger than the head portion 11, and a part of the head portion 11 is fitted into and joined to the opening 7.

  Thereby, since the head part 11 is positioned by the opening part 7 larger than the head part 11 formed in the base member 1 when the base member 1 and the head part 11 are bonded and bonded, it is possible to perform bonding with high accuracy.

Next, a fourth embodiment of the liquid ejection head according to the present invention will be described with reference to FIG. FIG. 17 is an explanatory cross-sectional view showing a state before the head portion of the head is incorporated into the base member.
Here, the height H2 in the direction perpendicular to the liquid flow direction of the second common liquid chamber portion 3B of the base member 1 is the height in the direction perpendicular to the liquid flow direction of the first common liquid chamber portion 3A of the head portion 11. The configuration is larger than the height H1.

  That is, in order to quickly supply a large amount of ink to each individual flow path of the head unit 11, the fluid resistance of the common liquid chamber 3 is required to be low, and for this purpose, the cross-sectional area of the ink flow in the common liquid chamber 3 is as small as possible. It becomes necessary to enlarge. On the other hand, since there is a demand for reducing the width of the liquid discharge head in order to make the image forming apparatus compact, it is preferable to increase the height of the common liquid chamber 3 with the same cross-sectional area.

  Therefore, when forming the common liquid chamber 3 having a required height H, the height of the second common liquid chamber portion 3B on the base member 1 side is higher than the height H1 of the first common liquid chamber portion 3A on the head portion 11 side. By making H2 as high as possible, the fluid resistance of the common liquid chamber 3 can be reduced. In this case, as a result, the height (thickness) of the base member 1 is increased, and the rigidity of the base member 1 is improved. Therefore, the flatness in the length direction of the base member 1 is easily maintained, and the base member 1 Since the bonding pressure when the head portion 11 is bonded and bonded becomes uniform, high quality bonding becomes possible and the quality is stabilized.

Next, an example of an image forming apparatus according to the present invention will be described with reference to FIG. FIG. 18 is a schematic configuration diagram of the entire mechanism unit of the apparatus.
This image forming apparatus includes an image forming unit 202 and the like inside the apparatus main body 201, and includes a paper feed tray 204 on the lower side of the apparatus main body 201 on which a large number of recording media (sheets) 203 can be stacked. The paper 203 fed from the paper tray 204 is taken in, a required image is recorded by the image forming unit 202 while the paper 203 is transported by the transport mechanism 205, and then a paper discharge tray 206 mounted on the side of the apparatus main body 201. The sheet 203 is discharged.

  In addition, a duplex unit 207 that can be attached to and detached from the apparatus main body 201 is provided, and when performing duplex printing, the sheet 203 is taken into the duplex unit 207 while being transported in the reverse direction by the transport mechanism 205 after one-side (front) printing is completed. Then, the other side (back side) is sent to the transport mechanism 205 again as the printable side, and the sheet 203 is discharged to the discharge tray 206 after the other side (back side) printing is completed.

  Here, the image forming unit 202, for example, ejects liquid droplets of each color of black (K), cyan (C), magenta (M), and yellow (Y), and is a full line type of four liquids according to the present invention. The recording heads 211k, 211c, 211m, and 211y (which are referred to as “recording heads 211” when the colors are not distinguished) are configured by ejection heads, and each recording head 211 has a nozzle surface on which nozzles for ejecting droplets are formed downward. The head holder 213 is attached.

  In addition, maintenance and recovery mechanisms 212k, 212c, 212m, and 212y for maintaining and recovering the head performance corresponding to each recording head 211 (referred to as “maintenance and recovery mechanism 212” when colors are not distinguished) are provided. During the head performance maintenance operation such as wiping processing, the recording head 211 and the maintenance / recovery mechanism 212 are relatively moved so that the capping member constituting the maintenance / recovery mechanism 212 faces the nozzle surface of the recording head 211.

  Here, the recording head 211 is arranged to eject droplets of each color in the order of yellow, magenta, cyan, and black from the upstream side in the paper conveyance direction, but the arrangement and the number of colors are not limited to this. Further, as the line-type head, one or a plurality of heads provided with a plurality of nozzle rows for discharging droplets of each color at predetermined intervals can be used, and a recording liquid cartridge for supplying a recording liquid to the head and the head. Can be integrated or separated.

  The sheets 203 in the sheet feeding tray 204 are separated one by one by a sheet feeding roller (half-moon roller) 221 and a separation pad (not shown) and fed into the apparatus main body 201, and are registered along the guide surface 223 a of the conveyance guide member 223. 225 and the conveying belt 233, and are sent to the conveying belt 233 of the conveying mechanism 205 via the guide member 226 at a predetermined timing.

  In addition, a guide surface 223 b that guides the sheet 203 sent out from the duplex unit 207 is also formed on the transport guide member 223. Further, a guide member 227 for guiding the sheet 203 returned from the transport mechanism 205 during duplex printing to the duplex unit 207 is also provided.

  The transport mechanism 205 includes an endless transport belt 233 that is stretched between a transport roller 231 that is a driving roller and a driven roller 232, a charging roller 234 that charges the transport belt 233, and an image forming unit 202. A platen member 235 that maintains the flatness of the conveying belt 233 at the opposite portion, a pressing roller 236 that presses the paper 203 fed from the conveying belt 233 against the conveying roller 231, and other recording liquid that is not shown, but adheres to the conveying belt 233. It has a cleaning roller made of a porous material or the like, which is a cleaning means for removing (ink).

  A paper discharge roller 238 and a spur 239 for sending the paper 203 on which an image is recorded to the paper discharge tray 206 are provided on the downstream side of the transport mechanism 205.

  In the image forming apparatus configured as described above, the transport belt 233 rotates in the direction indicated by the arrow, and is positively charged by coming into contact with the charging roller 334 to which a high potential applied voltage is applied. In this case, the charging belt 233 is charged at a predetermined charging pitch by switching the polarity of the charging voltage of the charging roller 234 at a predetermined time interval.

  Here, when the sheet 203 is fed onto the conveying belt 233 charged to this high potential, the inside of the sheet 203 is in a polarized state, and the charge opposite in polarity to the charge on the conveying belt 233 is conveyed to the conveying belt 233 of the sheet 203. The charge on the transport belt 233 and the charge on the transported sheet 203 are electrostatically attracted to each other, and the sheet 203 is electrostatically attracted to the transport belt 233. Is done. In this way, the sheet 203 strongly adsorbed to the conveyor belt 233 is calibrated for warpage and unevenness, and a highly flat surface is formed.

  Then, the paper 203 is moved around the conveyor belt 233 and droplets are ejected from the recording head 211, whereby a required image is formed on the paper 203, and the paper 203 on which the image is recorded is discharged to the paper discharge roller 238. Is discharged to the discharge tray 206.

  As described above, since the image forming apparatus includes the recording head including the liquid discharge head according to the present invention, it is possible to form an image at high speed using a recording head that can be obtained at low cost and high reliability. it can.

  In the above embodiment, the example in which the image forming apparatus according to the present invention is applied to an image forming apparatus having a printer configuration has been described. However, the present invention is not limited to this. For example, an image of a plotter, a printer / fax / copier multifunction machine, It can be applied to a forming apparatus.

FIG. 3 is an explanatory plan view of the first embodiment of the liquid ejection head according to the present invention as viewed from the nozzle surface side. It is the plane explanatory view similarly seen from the base member side. FIG. 3 is a cross-sectional explanatory view taken along the line AA in FIG. 2. It is a section explanatory view of a state before joining a head part to a base member similarly. FIG. 6 is an enlarged explanatory view for explaining the ink flow in the common liquid chamber. It is expansion sectional explanatory drawing of the common liquid chamber of a comparative example. It is explanatory drawing with which it uses for description of the example which shape | molds the base member of a comparative example with a piece metal mold | die. FIG. 10 is an explanatory plan view of the liquid ejection head according to the present invention as viewed from the nozzle surface side in the second embodiment. It is the plane explanatory view similarly seen from the base member side. FIG. 10 is a cross-sectional explanatory view taken along line B-B in FIG. 9. FIG. 10 is a cross-sectional explanatory view taken along the line C-C in FIG. 9. FIG. 12 is an explanatory cross-sectional view corresponding to FIG. 11 in a state before the head portion is joined to the base member. FIG. 6 is an enlarged explanatory view for explaining the ink flow in the common liquid chamber. It is sectional explanatory drawing which shows the example from which a rectification | straightening part differs. It is a section explanatory view of a 3rd embodiment of a liquid discharge head concerning the present invention. It is a section explanatory view showing a state before a head part is similarly built in a base member. It is a section explanatory view showing the state before incorporating the head part of the 4th embodiment of the liquid discharge head concerning the present invention into a base member. 1 is a schematic configuration diagram of an entire mechanism unit showing an example of an image forming apparatus according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base member 3 ... Common liquid chamber 3A ... 1st common liquid chamber part 3B ... 2nd common liquid chamber part 4, 5 ... Ink flow path 7 ... Opening part 11 ... Head part 12 ... Nozzle 13 ... Nozzle member 14 ... Flow Road member 15 ... Diaphragm member 16 ... Common liquid chamber member 17 ... Nozzle cover 211k, 211c, 211m, 211y ... Recording head (liquid ejection head)

Claims (6)

A plurality of head parts are integrated with the base member,
The plurality of head portions pressurize the liquid in the individual liquid chamber, and a first common liquid chamber portion that constitutes a common liquid chamber that supplies liquid to each individual liquid chamber corresponding to the plurality of nozzles that discharge droplets. Actuator means for generating energy, and
The base member is provided with a second common liquid chamber portion that forms the common liquid chamber together with the first common liquid chamber portion of the head portion,
A liquid discharge head characterized in that a rectifying unit for adjusting a flow of liquid flowing in from a flow path communicating with the second common liquid chamber portion of the base member is provided in the first common liquid chamber portion of the head portion. .   2. The liquid discharge head according to claim 1, wherein the rectifying portion of the head portion is provided at a position facing a liquid supply port that supplies a liquid to a second common liquid chamber portion of the base member. Liquid discharge head.   The liquid discharge head according to claim 1, wherein the rectifying portion of the head portion has a tapered shape or an R shape.   4. The liquid discharge head according to claim 1, wherein an opening including a second common liquid chamber portion of the base member is larger than the head portion, and a part of the head portion is fitted into the opening. A liquid discharge head characterized by that.   5. The liquid ejection head according to claim 1, wherein a height of the second common liquid chamber portion of the base member in a direction perpendicular to a liquid flow direction is equal to that of the first common liquid chamber portion of the head portion. A liquid discharge head having a height greater than a height in a direction perpendicular to a liquid flow direction.   An image forming apparatus comprising a recording head comprising the liquid ejection head according to claim 1.

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