JP2011255586A - Liquid ejection unit, and liquid ejection apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid ejection unit that can transmit heat from a transmission material to the liquid of each storage chamber more evenly and can prevent a landing variation caused by differences in heat quantity transmitted to the liquid of the storage chamber, and to provide a liquid ejection apparatus.SOLUTION: A dumper flow member 21 includes a spacial part 53 between a pair of storage chamber 51 out of the storage chambers 51, a heat transmission member 50 includes a sidewall 50b (extension part) extended from a body part 50a of the heat transmission member, and the sidewall 50b is inserted into the spacial part of the dumper flow member and arranged along the storage chamber.

Description

  The present invention relates to a liquid ejecting head such as an ink jet recording head, a liquid ejecting unit including a liquid storing member having a plurality of liquid storing chambers for storing liquid supplied to the liquid ejecting head, and a liquid including the same. The present invention relates to an injection device.

  Examples of the liquid ejecting head that ejects the liquid in the pressure chamber as a droplet by causing pressure fluctuations include an ink jet recording head used in an image recording apparatus such as an ink jet recording apparatus (hereinafter simply referred to as a printer). (Hereinafter simply referred to as a recording head), a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, an electrode material ejecting head used for forming an electrode such as an organic EL (Electro Luminescence) display, FED (surface emitting display) And a bio-organic matter ejecting head used for manufacturing a biochip (biochemical element).

  For example, in the recording head described above, ink in an ink cartridge enclosing liquid ink is introduced into a pressure chamber through a common liquid chamber, and pressure generating means such as a piezoelectric vibrator (piezoelectric actuator) or a heating element is provided. It is configured to drive and apply a pressure fluctuation to the ink in the pressure chamber, and to eject the ink from the nozzle communicating with the pressure chamber using the pressure fluctuation. The recording head having this configuration has a plurality of ink storage chambers, an ink tank storing a plurality of colors of ink stored in these storage chambers, and a nozzle row corresponding to each color ink. Yes (see, for example, Patent Document 1). The recording head has a flexible wiring material for driving the piezoelectric actuator. The flexible wiring material is provided with a drive circuit, and a part of the flexible wiring material is in contact with the heat transfer plate so as to conduct heat. . The heat radiated from the heat transfer plate is also transmitted to the ink stored in each ink storage chamber of the ink tank. When the ink is heated, the ink viscosity fluctuates (specifically, decreases), and there is a possibility that the ejection characteristics such as the amount of ink ejected from the nozzle and the flying speed fluctuate. When the ejection characteristics fluctuate, the landing shape and landing position of ink on a recording medium (landing target) such as recording paper varies (hereinafter referred to as landing dispersion), and the image quality such as an image formed on the recording medium decreases. It becomes.

  For this reason, in the recording head disclosed in Patent Document 1 described above, the ink storage chamber corresponding to the dark ink is disposed away from the heat transfer plate, while the ink storage corresponding to the light ink is stored. By arranging the chambers close to each other, variations in ink landing are made inconspicuous, and a decrease in print quality is suppressed. That is, the darker ink is more conspicuous in the landing position shift and landing shape difference on the recording medium than in the case of the light ink, so that the ink storage chamber corresponding to the dark ink has a heat transfer plate. It arranges so that the influence of the heat from

JP 2007-125712 A

However, the above-described configuration mainly suppresses the influence of heat on the dark color ink, and cannot prevent landing variation due to the difference in the amount of heat transmitted to each color ink.
Also, for example, in the case of a recording head that uses ink having a higher viscosity than water-based ink, such as ultraviolet curable ink, the heat of the heat transfer plate is used to reduce the viscosity of each ink. However, in this case, with the above configuration, the viscosity of the ink in the ink storage chamber at a position away from the heat transfer plate cannot be sufficiently reduced, and there is a possibility that the ink is not ejected normally.
Such a problem is not limited to an ink jet recording apparatus equipped with an ink jet recording head that ejects ink droplets, but also in a liquid ejecting apparatus equipped with other liquid ejecting heads that eject liquid droplets other than ink. Exists.

  The present invention has been made in view of such circumstances, and an object thereof is to transmit heat from the heat transfer member more uniformly to the liquid in each storage chamber and to the liquid in each storage chamber. It is an object of the present invention to provide a liquid ejecting unit and a liquid ejecting apparatus that can suppress landing variation caused by a difference in heat amount.

In order to achieve the above object, a liquid ejecting unit of the present invention includes a liquid ejecting head that ejects liquid from a nozzle;
A plurality of storage chambers for storing liquid, and a liquid storage member for supplying the liquid in the storage chamber to the liquid jet head side;
A wiring member having a drive circuit for supplying a drive signal to the liquid jet head;
A heat transfer member that radiates heat transferred from the drive circuit, and a liquid jet unit comprising:
The liquid storage member has a space between at least a pair of storage chambers among the storage chambers,
The heat transfer member has an extending portion extending from the heat transfer member main body,
The extending portion is inserted into the space portion and arranged along the storage chamber.

  According to the said structure, a space part is provided between at least one pair of storage chambers among each storage chamber of a liquid storage member, and the extended part of a heat-transfer member is inserted in this space part, and it arrange | positions along a storage chamber. Thus, the liquid stored in each storage chamber can be warmed more uniformly. As a result, the viscosity of the liquid in each storage chamber is approximately the same, and variations in ejection characteristics (liquid flight speed and liquid amount) due to the difference in the amount of heat transferred to the liquid in each storage chamber are suppressed. As a result, it is possible to more reliably suppress landing variation (variation in the landing shape and landing position of the liquid with respect to the landing target such as a recording medium). And since the liquid of each storage chamber can be heated more uniformly, the freedom degree of the arrangement layout of the storage chamber of each liquid in a liquid storage member is securable.

  Further, for example, when using a liquid in a so-called high viscosity region of 8 mPa · s or higher at an environmental temperature of 20 ° C., the liquid in each storage chamber can be warmed using heat from the extended portion of the heat transfer member. Therefore, it is not necessary to provide a separate mechanism for heating the liquid. And according to the said structure, since the liquid of each storage chamber can be warmed more uniformly, it becomes possible to fully reduce the viscosity of the liquid in each storage chamber, respectively.

  Furthermore, in the manufacturing process of the liquid ejecting unit, when assembling the liquid storage member and the heat transfer member to the liquid ejecting unit, both of them are temporarily assembled by inserting the extended portion of the heat transfer member into the space of the liquid storage member. Can be attached all at once. This improves the assembly workability.

  The said structure WHEREIN: It is desirable to arrange | position so that the said storage chambers may overlap in the direction which cross | intersects with the ejection surface of the said liquid ejecting head.

  The said structure WHEREIN: Adopting the structure set as the space | interval of the said storage chambers in the said space part was set so that a clearance gap might be provided between the said extension part arrange | positioned in the said space part, and each storage chamber. desirable.

  According to the above configuration, in the case where the surface on the space portion side of the storage chamber is a flexible portion having flexibility, and the pressure variation generated in the liquid in the storage chamber is reduced by the flexible portion, Since the gap is provided between the extending portion arranged in the space and each storage chamber, the movement of the flexible portion of the storage chamber is suppressed.

And the liquid ejecting apparatus of the present invention includes a liquid ejecting unit having the above-described configurations
A liquid supply source for storing liquid to be supplied to the damper flow path section;
It is provided with.

2 is a plan view illustrating a configuration of a printer. FIG. FIG. 3 is an exploded perspective view illustrating a configuration of an ink ejecting unit. It is principal part sectional drawing of an ink ejection unit. FIG. 3 is a cross-sectional view of a main part of the recording head. FIG. 3 is a plan view of the recording head as viewed from the nozzle forming substrate side. FIG. 6 is a cross-sectional view of a main part of an ink ejecting unit according to a second embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. In the embodiments described below, various limitations are made as preferred specific examples of the present invention. However, the scope of the present invention is not limited to the following description unless otherwise specified. However, the present invention is not limited to these embodiments. In this embodiment, the ink ejection unit 10 will be described as an example of the liquid ejection unit.

  FIG. 1 is a plan view illustrating a configuration of an ink jet recording apparatus (a type of liquid ejecting apparatus, hereinafter referred to as a printer 1) on which an ink ejecting unit 10 (see FIG. 2 and the like) is mounted. The illustrated printer 1 is a device that records an image or the like by ejecting liquid ink (corresponding to the liquid in the present invention) onto the surface of a recording medium (landing target: not shown) such as recording paper. . The printer 1 includes a housing 2 and a platen 3 disposed in the housing 2, and is mounted on the platen 3 by a paper feed roller (none of which is shown) that rotates by driving a paper feed motor. The recording paper is transported to each other. A guide rod 4 is installed in the housing 2 in parallel with the platen 3, and a carriage 5 of the ink ejection unit 10 is slidably supported on the guide rod 4. The carriage 5 is connected to a timing belt 9 installed between a driving pulley 7 that is rotated by driving of a pulse motor 6 and an idler pulley 8 that is provided on the opposite side of the housing 2 from the driving pulley 7. Has been. The ink ejection unit 10 is configured to reciprocate in the main scanning direction perpendicular to the paper feeding direction along the guide rod 4 by driving the pulse motor 6.

  A cartridge holder 14 on which an ink cartridge 13 (a kind of liquid supply source) is detachably mounted is provided on one side of the housing 2. In the present embodiment, a total of four ink cartridges 13 corresponding to a total of four ink colors of cyan, magenta, yellow, and black are attached to the cartridge holder 14. Each ink cartridge 13 is connected to an air pump 16 via an air tube 15, and air from the air pump 16 is supplied into each ink cartridge 13. The ink is supplied to the damper flow path member 21 (see FIG. 2) on the ink ejection unit 10 side through the ink supply tube 17 by the pressurization in the ink cartridge 13 by the air.

  The ink supply tube 17 is a flexible hollow member made of, for example, a synthetic resin such as silicon, and an ink flow path corresponding to each ink cartridge 13 is formed inside the ink supply tube 17. ing. Also, an FFC (flexible flat cable) for transmitting a drive signal or the like from the control unit (not shown) on the printer 1 body side to the ink ejection unit 10 side between the printer 1 body side and the ink ejection unit 10 side. ) 18 is wired.

Next, the configuration of the ink ejection unit 10 will be described. Here, FIG. 2 is an exploded perspective view of the ink ejecting unit 10, and FIG. 3 is a cross-sectional view of the ink ejecting unit 10.
The illustrated ink ejection unit 10 includes a carriage 5, a recording head 20 (a kind of liquid ejection head in the present invention), and a damper flow path member 21 (a kind of liquid storage member in the present invention). As shown in FIG. 2, the ink ejecting unit 10 houses a damper flow path member 21 in the inner space of a substantially box-shaped carriage that is open at the top, and the bottom side of the carriage 5 (when recording on a recording medium). The recording head 20 is attached to the surface facing the recording medium.

  FIG. 4 is a cross-sectional view of an essential part for explaining an example of the configuration of the recording head 20. The recording head 20 in this embodiment is schematically configured to include a flow path unit 23, a pressure generation unit 24, and a flexible cable 25 (see FIG. 3). The flow path unit 23 includes a supply port forming substrate 32 having a through hole that becomes a part of the introduction port 28, the supply port 30, and the nozzle communication port 31, and a through hole serving as a common liquid chamber 33 (also referred to as a reservoir or a manifold). Nozzle forming substrate having a plurality of nozzle rows 29 (a kind of nozzle group) formed by arranging a plurality of nozzles 26 in a row and a common liquid chamber forming substrate 34 having a through hole that becomes a part of the hole and nozzle communication port 31 27. The supply port forming substrate 32, the common liquid chamber forming substrate 34, and the nozzle forming substrate 27 are produced, for example, by pressing a stainless plate. Moreover, not only metal plates, such as stainless steel, but a silicon substrate, a resin plate, etc. can be used. In the flow path unit 23, the nozzle forming substrate 27 is disposed on one surface (lower side in FIG. 4) of the common liquid chamber forming substrate 34, and the supply port forming substrate 32 is disposed on the other surface (upper side in FIG. 4). And these are produced by joining in a laminated state.

  The pressure generating unit 24 includes a pressure chamber forming substrate 37 having a through hole serving as the introduction port 28 and a through hole serving as the pressure chamber 36, and a through hole serving as the introduction port 28. Diaphragm 38, a through-hole serving as a part of the introduction port 28, a supply-side communication port 41, a communication port forming substrate 39 provided with a communication hole serving as a part of the nozzle communication port 31, and the piezoelectric vibrator 40 ( A kind of pressure generating means or a piezoelectric actuator).

  The pressure generating unit 24 has a communication port forming substrate 39 on one surface of the pressure chamber forming substrate 37 and a diaphragm 38 on the other surface to join each member. It is manufactured by forming the piezoelectric vibrator 40. Among these members, the pressure chamber forming substrate 37, the vibration plate 38, and the communication port forming substrate 39 are made of ceramics such as alumina and zirconium oxide, and are joined by firing.

  The piezoelectric vibrator 40 is a so-called flexural mode piezoelectric vibrator, and is formed for each pressure chamber 36 on the surface of the vibration plate 38 opposite to the pressure chamber 36. The piezoelectric vibrator 40 has a multilayer structure including a piezoelectric layer 43, an upper electrode 44, and a lower electrode 45, and the piezoelectric layer 43 is sandwiched between the upper electrode 44 and the lower electrode 45. A drive signal is supplied between the upper electrode 44 and the lower electrode 45 through the flexible cable 25 (a kind of wiring member). In the present embodiment, the upper electrode 44 is an individual electrode provided for each piezoelectric vibrator 40, and the lower electrode 45 is a common electrode that is adjusted to, for example, the ground potential. When the drive signal is supplied, an electric field corresponding to the potential difference is generated between the upper electrode 44 and the lower electrode 45. This electric field is applied to the piezoelectric layer 43, and the piezoelectric layer 43 is deformed according to the strength of the applied electric field. In response to this deformation, the diaphragm 38 that partitions the pressure chamber 36 is displaced, and the volume of the pressure chamber 36 varies due to this displacement.

  In the recording head 20 configured as described above, a series of individual flow paths from the common liquid chamber 33 to the nozzle 26 through the supply port 30, the supply side communication port 41, the pressure chamber 36, and the nozzle communication port 31 are formed for each nozzle 26. ing. Further, in the recording head 20 in the present embodiment, a common liquid chamber 33 is provided for each ink color (for each nozzle row 29 described later), and in this embodiment, a total of four corresponding to four colors of ink is provided. One is provided. Each common liquid chamber 33 is supplied with ink from the storage chamber 51 of the damper flow path member 21 through the inlet port 28. The recording head 20 is integrated with a frame-shaped reinforcing plate 47 on its upper surface and a frame-shaped protection plate 48 on its lower surface. These frame-shaped plate materials are made of metal such as stainless steel.

FIG. 5 is a plan view of the recording head 20 as viewed from the nozzle forming substrate 27 side. As shown in the figure, the nozzle forming substrate 27 has a plurality of (for example, 180) nozzles 26 at a predetermined pitch along a direction (recording medium conveyance direction) intersecting the scanning direction of the recording head 20. A nozzle row 29 is formed in a row. In the present embodiment, a total of four nozzle rows including a nozzle row 29C corresponding to cyan ink, a nozzle row 29M corresponding to magenta ink, a nozzle row 29Y corresponding to yellow ink, and a nozzle row 29K corresponding to black ink. 29 are arranged in the scanning direction of the recording head 20.
Note that the configuration of the recording head 20 is not limited to that illustrated in FIG. 4, and recording heads having various configurations can be employed.

  The flexible cable 25 in the present embodiment is mounted with a driving IC 46 (a kind of driving circuit in the present invention) for controlling the application of a driving signal to the piezoelectric vibrator 40 on the surface of a base film such as polyimide. A wiring pattern (not shown) of the common electrode wiring is formed, and the wiring pattern other than the wiring terminals and the driving IC 46 are covered with a resist. One end side terminal portion (not shown) is formed at one end portion of the flexible cable 25, and the one end side terminal portion serves as an individual terminal or a common terminal of each piezoelectric vibrator 40 on the upper surface of the pressure generating unit 24. Electrically connected. The other end side of the flexible cable 25 is drawn into the accommodation cavity 11 through the bottom through-hole 12 penetrating the carriage 5 and the reinforcing plate 47, and is further connected to a relay board (not shown) disposed on the carriage 5. Electrically connected. Further, as shown in FIG. 3, the drive IC 46 is disposed at the bottom of the accommodation space 11 of the carriage 5. The heat transfer member 50 comes into contact with the drive IC 46. Details of the heat transfer member 50 will be described later.

  A damper flow path member 21 capable of storing ink and relieving pressure fluctuation generated in the ink is accommodated in the accommodation space 11 of the carriage 5 on the upstream side of the recording head 20. A plurality of storage chambers 51 are defined in the damper flow path member 21. The storage chamber 51 is a space that is long in the horizontal direction parallel to the nozzle formation surface of the nozzle forming substrate 27 in the cross section in FIG. 3 and short in the vertical direction perpendicular to the direction, and is independent for each ink color. Is provided. The storage chambers 51 are arranged side by side so as to overlap in a direction perpendicular to the nozzle formation surface of the nozzle formation substrate 27. In the present embodiment, a total of four storage chambers 51C for storing cyan ink, a storage chamber 51M for storing magenta ink, a storage chamber 51Y for storing yellow ink, and a storage chamber 51K for storing black ink in order from the top. Two storage chambers 51 are provided. A space 53 is provided between the second storage chamber 51M from the top and the third storage chamber 51Y from the top, that is, in the central portion of the damper flow path member 21 in the storage chamber arrangement direction. As will be described later, the lateral wall portion 50b of the heat transfer member 50 is inserted into and accommodated in the space portion 53 through the opening on the heat transfer member 50 side (left side in FIG. 3). And the dimension (space | interval of the storage chambers 51M and 51Y in the space part 53) of the storage room arrangement direction of this space part 53 is larger than the plate | board thickness of the horizontal wall part 50b, for example, about 1.5 times-2 times Is set. In the present embodiment, the space 53 penetrates from the surface on the damper flow path member 21 facing the heat transfer member 50 to the surface on the opposite side. Thereby, the air permeability of the space part 53 is ensured, and the temperature of the space part 53 is prevented from excessively rising due to heat radiation from the lateral wall part 50b.

  In the present embodiment, at least one surface of each of the storage chambers 51, that is, the surface opposite to the adjacent storage chamber 51 among the surfaces in the storage chamber stacking direction, may be formed of a flexible thin film or the like. A flexure 54 is formed. That is, the upper surface side of the cyan ink storage chamber 51C and the yellow ink storage chamber 51Y is a flexible portion 54, and the lower surface side of the magenta ink storage chamber 51M and the black ink storage chamber 51K is a flexible portion. 54. The flexible portion 54 is displaced according to the pressure of the ink in the corresponding storage chamber 51, so that the pressure generated in the ink in the storage chamber 51 with the occurrence of an impact when the carriage 5 moves or stops. Reduce fluctuations. Thereby, it is suppressed that the ejection characteristic of each nozzle 26 is fluctuated by the vibration described above.

  As shown in FIG. 2, a total of four ink inlets 52 corresponding to the inks of the respective colors are provided on the upper surface of the damper flow path member 21. Each ink introduction port 52 communicates with the corresponding storage chamber 51. The ink supply tube 17 from the corresponding ink cartridge 13 is connected to each ink introduction port 52 in a liquid-tight state. As a result, the ink supplied from the ink cartridge 13 through the ink supply tube 17 is introduced into the storage chamber 51 through the ink introduction port 52. In addition, a total of four outlets (not shown) are provided on the lower surface of the damper flow path member 21 corresponding to the storage chambers 51. Then, the ink stored in the storage chamber 51 is supplied to the recording head 20 side through the introduction port 52.

Next, the heat transfer member 50 will be described.
The heat transfer member 50 in the present embodiment is a metal plate-like member having good thermal conductivity (for example, 200 W / (m · K) or more), and is made of, for example, an aluminum plate. The heat transfer member 50 includes a main body portion 50a bent in a substantially U-shaped cross section, and a vertical center portion of one vertical wall portion on the damper flow path member 21 side among the vertical wall portions of the main body portion 50a facing each other. The lateral wall portion 50b is formed by bending the tip portion from the portion toward the side (damper flow path member 21 side) at a substantially right angle. This bending position is adjusted to a position corresponding to the space portion 53 of the damper flow path member 21 in a state where the heat transfer member 50 and the damper flow path member 21 are positioned and attached in the accommodation space 11 of the carriage 5. ing. The protruding length of the horizontal wall portion 50b from the main body portion 50a is set to be approximately the same as or slightly longer than the dimension of the damper flow path member 21 in the nozzle row direction. In addition, this horizontal wall part 50b is a kind of extension part extended from the main-body part 50a of the heat-transfer member 50 to the damper flow path member 21 side.

  The main body part 50 a of the heat transfer member 50 is disposed in the housing space 11 of the carriage 5 on the side wall side of the carriage 5 with respect to the damper flow path member 21 with a gap from the damper flow path member 21. The Further, the bottom of the main body 50 a is in contact with the drive IC 46 of the flexible cable 25. As a result, heat generated by the drive IC 46 is conducted to the heat transfer member 50, and the conducted heat is released into the accommodation space 11 of the carriage 5. Further, the lateral wall portion 50 b is inserted into the space portion 53 of the damper flow path member 21. The horizontal wall portion 50b accommodated in the space portion 53 is spaced from the magenta ink storage chamber 51M and the yellow ink storage chamber 51Y among the storage chambers 51 of the damper flow path member 21 at intervals D1 and D2, respectively. It extends substantially parallel between the two. Thus, by forming the distances D1 and D2 with respect to the storage chambers 51M and 51Y, the movement of the flexible portion 54 of the storage chambers 51M and 51Y is not hindered. Since heat from the driving IC 46 is also transmitted to the horizontal wall portion 50b, heat is released from the horizontal wall portion 50b into the space portion 53.

  As described above, the space portion 53 is provided in the central portion of the damper flow path member 21 in the storage chamber arrangement direction, and the lateral wall portion 50 b of the heat transfer member 50 is inserted into the space portion 53 and disposed along the storage chamber 51. Thus, the ink stored in each storage chamber 51 can be warmed more uniformly. Thereby, the viscosity of the ink in each storage chamber 51 is equal, and the variation in the ejection characteristics due to the difference in the amount of heat transmitted to each color ink is suppressed. As a result, it is possible to more reliably suppress variations in ink landing on the recording medium. And since the ink of each color can be heated more uniformly, the freedom of the arrangement layout of the storage chamber 51 of each color in the damper flow path member 21 can be ensured.

  For example, when using a so-called high viscosity ink having a viscosity higher than that of the water-based ink (for example, 8 mPa · s or more under an environmental temperature of 20 ° C.), such as an ultraviolet curable ink, the heat transfer member 50 is used. Since the ink in each storage chamber 51 can be warmed using the heat from the horizontal wall portion 50b, there is no need to provide a separate mechanism for heating the ink. And according to the said structure, since each ink can be warmed more uniformly, it becomes possible to fully reduce the ink viscosity of each color, respectively.

  Further, in the manufacturing process of the ink ejection unit 10, when the damper flow path member 21 and the heat transfer member 50 are assembled to the carriage 5 of the ink ejection unit 10, the lateral wall of the heat transfer member 50 is placed in the space 53 of the damper flow path member 21. Both can be attached uniformly in a state where the portion 50b is inserted and temporarily assembled. This improves the assembly workability. In this case, with respect to the dimension of the space portion 53 in the storage chamber arrangement direction, it is desirable to shorten the horizontal wall portion 50b so that the movement of the flexible portion 54 of each storage chamber 51 is not hindered. Thereby, it is suppressed that the attitude | position of the damper flow path member 21 and the heat-transfer member 50 inclines or leaves | separates relatively in a temporary assembly state.

In the above embodiment, the space portion 53 is provided in the central portion of the damper flow path member 21 in the storage chamber arrangement direction, and the lateral wall portion 50b is accommodated in the space portion 53. However, the present invention is not limited thereto. It is sufficient that the space 53 is provided between at least one pair of the storage chambers 51 among the storage chambers 51.
FIG. 6 is a cross-sectional view of the ink ejecting unit 10 for explaining the second embodiment of the present invention. In the present embodiment, the space portions 53 are provided between all the storage chambers 51, and the side wall portions 50b extend from the main body portion 50a of the heat transfer member 50 into the space portions 53, respectively. Different from the first embodiment. Since other configurations are the same as those in the first embodiment, description thereof is omitted. According to this embodiment, since the ink in each storage chamber 51 can be heated more uniformly, landing variation can be prevented more reliably. In particular, this is effective for a configuration in which the number of storage chambers 51 is larger.

  In each of the above embodiments, a total of four colors of cyan, magenta, yellow, and black are used for a plurality of ink colors, and the storage chamber 51 that stores each ink is cyan from the top of the damper flow path member 21 in order. A configuration is shown in which a total of four storage chambers 51 are arranged: a storage chamber 51C for storing ink, a storage chamber 51M for storing magenta ink, a storage chamber 51Y for storing yellow ink, and a storage chamber 51K for storing black ink. However, it is not limited to such a configuration. In other words, the ink color is not limited to the exemplified colors, and other colors can be used, and the number of colors is not limited to four, but three or less or five or more. You can also. Further, the arrangement order of the storage chambers 51 can be arbitrarily set.

  Further, the above is not limited to the illustrated ink ejecting unit 10 as long as it has a plurality of storage chambers for storing a plurality of liquids, and the present invention can be applied to a liquid ejecting unit that handles other liquids. it can. For example, a display manufacturing apparatus that manufactures color filters such as liquid crystal displays, an electrode manufacturing apparatus that forms electrodes such as organic EL (Electro Luminescence) displays and FEDs (surface emitting displays), and chips that manufacture biochips (biochemical elements) The present invention can also be applied to a manufacturing apparatus or the like.

DESCRIPTION OF SYMBOLS 1 ... Printer, 10 ... Ink jet unit, 13 ... Ink cartridge, 20 ... Recording head, 21 ... Damper flow path member, 26 ... Nozzle, 50 ... Heat transfer member, 50a ... Main part, 50b ... Side wall part, 51 ... Storage Chamber, 53 ... space part, 54 ... flexible part

Claims (4)

A liquid ejecting head that ejects liquid from a nozzle;
A plurality of storage chambers for storing liquid, and a liquid storage member for supplying the liquid in the storage chamber to the liquid jet head side;
A wiring member having a drive circuit for supplying a drive signal to the liquid jet head;
A heat transfer member that radiates heat transferred from the drive circuit, and a liquid jet unit comprising:
The liquid storage member has a space between at least a pair of storage chambers among the storage chambers,
The heat transfer member has an extending portion extending from the heat transfer member main body,
The liquid ejecting unit, wherein the extended portion is inserted into the space portion and disposed along the storage chamber.   The liquid ejecting unit according to claim 1, wherein the storage chambers are arranged so as to overlap each other in a direction intersecting with an ejecting surface of the liquid ejecting head.   The space between the storage chambers in the space is set so that a gap is provided between the extended portion arranged in the space and each storage chamber. Item 3. The liquid ejecting unit according to Item 2. A liquid ejecting unit according to any one of claims 1 to 3,
A liquid supply source for supplying a liquid to the liquid storage member;
A liquid ejecting apparatus comprising:

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