JP2010125640A - Liquid jetting head unit, method of manufacturing the same and liquid jetting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid jetting head unit for achieving high quality printing and a method of manufacturing the same, and a liquid jetting device. <P>SOLUTION: The liquid jetting head unit is provided with: a plurality of head bodies 200 each having nozzle surfaces 209 each provided with a nozzle for jetting liquid; and a common fixing member 300 by which the plurality of head bodies 200 are fixed, wherein penetrating parts 301 are disposed on the common fixing member 300, and the plurality of head bodies 200 are arranged at positions corresponding to the penetrating parts 301 and are joined to the common fixing member 300 in regions different from the nozzle surfaces 209. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a liquid ejecting head unit that ejects liquid such as ink, a manufacturing method thereof, and a liquid ejecting apparatus.

Conventionally, there has been known a liquid ejecting head that ejects liquid droplets from a nozzle by applying pressure to the liquid by a pressure generating means such as a piezoelectric element or a heat generating element. As a typical example, ink droplets are ejected. An ink jet recording head.

As such an ink jet recording head, an ink jet recording head unit in which nozzle surfaces of a plurality of head bodies are joined to a common fixing member to form a unit has been proposed (for example, see Patent Document 1). In Patent Document 1, the nozzle surface of each recording head main body is joined to such a fixing member so that the nozzle surfaces are aligned on the same plane, and the distance between the recording medium and the nozzle for each nozzle is made constant, so that high quality is achieved. Printing is realized.

JP 2007-216666 A

However, the ink jet recording head unit described in Patent Document 1 has a configuration in which each head body is assembled to a fixed member by bonding the nozzle surface to the fixed member. If unevenness occurs in the application state of the adhesive that joins the member, the nozzle surface may be inclined with respect to the recording medium. Also,
When the fixing member is manufactured by an inexpensive press process, burrs or the like are inevitably generated in the opening of the fixing member, and the nozzle surface may be inclined with respect to the recording medium due to the burrs. Such an inclination of the nozzle surface with respect to the recording medium causes a difference in the distance between the nozzle and the recording medium for each nozzle, and the landing position of the ink droplet is not stabilized, leading to a decrease in printing quality.

Such a problem exists not only in an ink jet recording head unit that ejects ink but also in a liquid ejecting head unit that ejects liquid other than ink.

SUMMARY An advantage of some aspects of the invention is that it provides a liquid ejecting head unit, a manufacturing method thereof, and a liquid ejecting apparatus that can realize high-quality printing.

An aspect of the present invention that solves the above problems includes a plurality of head bodies having a nozzle surface provided with a nozzle for discharging a liquid, and a common fixing member to which the plurality of head bodies are fixed.
The common fixing member is provided with a penetrating portion, and the plurality of head main bodies are disposed at positions corresponding to the penetrating portion and joined to the common fixing member in a region different from the nozzle surface. The liquid ejecting head unit is characterized in that.
In such an aspect, since the head body is disposed at a position corresponding to the penetrating portion, for example,
Each nozzle surface can be easily aligned on the same plane by pressing a portion of each head body corresponding to the penetrating portion of the common fixing member during manufacturing. That is, according to this aspect, it is possible to easily realize a head unit in which the nozzle surfaces are aligned on the same plane. Thereby, the landing position of the liquid discharged from the nozzle is stabilized, and high-quality printing can be realized with certainty.

Here, it is preferable that the plurality of head main bodies are joined to the common fixing member by an amount of adhesive corresponding to the size of each head main body. According to this, the dimensional error of the head main body is offset by the adhesive, and the nozzle surfaces can be easily and reliably aligned on the same plane. Therefore, the landing position of the liquid discharged from the nozzle is stable, and high-quality printing can be realized.

In addition, the common fixing member is a flat plate member, and the plurality of head main bodies include a convex portion protruding from a surface opposite to the nozzle surface, and the convex portion is inserted into the penetration portion. In this state, the common fixing member is preferably joined with an adhesive. According to this, since the head main body is very firmly fixed to the common fixing member, the reliability of the product can be improved. In addition, the dimensional error of the head body is canceled by the adhesive, and the nozzle surfaces can be easily and reliably aligned on the same plane.

According to another aspect of the invention, a liquid ejecting apparatus includes the liquid ejecting head unit described above. In this aspect, high quality printing can be realized.

According to another aspect of the present invention, there is provided a liquid ejecting head unit including a plurality of head main bodies having a nozzle surface provided with nozzles for discharging liquid, and a common fixing member to which the plurality of head main bodies are fixed. An alignment step of applying a pressing force in a direction from the opposite side of the nozzle surface to the nozzle surface to the head body to align the nozzle surfaces on the same plane; and the plurality of heads An application step of applying an adhesive to at least one of the main body and the common fixing member; and the nozzle surface of the head main body to hold the common fixing member in a state where the nozzle surfaces are aligned on the same plane. And a bonding step of bonding to different regions.
In this aspect, since the head surfaces are joined to the common fixing member while keeping the nozzle surfaces aligned in the same plane, the nozzle surfaces of the head bodies can be reliably aligned in the same plane. Therefore, according to this aspect, it is possible to reliably prevent the nozzle surface from being inclined with respect to the recording medium when assembled in the apparatus, and the landing position of the ink ejected from the nozzle is stabilized. Thus, a liquid ejecting head unit capable of performing high quality printing can be manufactured.

Here, it is preferable that the alignment step and the joining step are performed by placing the nozzle surfaces of the plurality of head bodies on a flat work surface of a jig. According to this, the nozzle surface of each head main body can be easily aligned on the same plane.

Further, it is preferable that the joining step is performed by discharging excess adhesive from between the common fixing member and the head body. According to this, it is possible to manufacture a liquid jet head unit in which the nozzle surfaces are aligned on the same plane easily and reliably.

The alignment step and the joining step are preferably performed by bringing a portion of the nozzle surface other than the region where the nozzle is provided into contact with the work surface of the jig. According to this,
Since no pressing force is applied to the nozzle, the deformation of the nozzle can be surely prevented,
It is possible to reliably prevent the contamination of the jig from moving and clogging the nozzle. Accordingly, it is possible to manufacture a liquid ejecting head unit that can perform high-quality printing with a stable landing position of the liquid discharged from the nozzle.

Hereinafter, the present invention will be described in detail based on embodiments. Hereinafter, as an example of the liquid ejecting head unit, an ink jet recording head unit that ejects ink droplets will be described as an example.

(Embodiment 1)
FIG. 1 is an exploded perspective view of an ink jet recording head unit according to Embodiment 1 of the present invention, FIG. 2 is an assembled perspective view of the ink jet recording head unit, and FIG. is there.

As shown in the drawing, an ink jet recording head unit (hereinafter referred to as a recording head unit) 1 of the present embodiment includes a cartridge case 100, a plurality of ink jet recording head main bodies (hereinafter referred to as recording head main bodies) 200, and a cartridge. The cover head 400 includes a common fixing member 300 provided between the case 100 and the recording head main body 200 to position and fix the recording head main body 200. The cartridge case 100 includes, for example, a cartridge mounting portion 101 that is formed of a resin material and into which an ink cartridge (not shown) that is an ink supply unit (liquid supply unit) is mounted. Further, on the bottom surface side of the cartridge case 100, a plurality of ink communication paths 102 having one end opened to each cartridge mounting portion 101 and the other end opened to the recording head main body 200 are provided. Further, an ink supply needle 103 to be inserted into the ink cartridge is fixed to the opening portion of the ink communication path 102 of the cartridge mounting portion 101.

On the bottom surface of such a cartridge case 100, a plurality of (in the illustrated example, four corresponding to each color ink) recording head main bodies 200 are positioned and fixed at predetermined intervals by a common fixing member 300. .

Here, the configuration of the recording head main body 200 will be described. 4 is an exploded perspective view of the recording head body, and FIG. 5 is a cross-sectional view of the recording head body. As shown in FIGS.
The flow path forming substrate 201 constituting the recording head main body 200 is made of, for example, a silicon single crystal substrate, and an elastic film made of silicon dioxide is formed on one surface side of the flow path forming substrate 201 by thermal oxidation in advance. A plurality of pressure generation chambers 203 are formed in the flow path forming substrate 201 by anisotropically etching the flow path forming substrate 201 from the other side. For example,
In the flow path forming substrate 201 according to this embodiment, two rows in which the pressure generation chambers 203 are arranged in the width direction are formed. In addition, a communication portion 205 is formed on the outer side in the longitudinal direction of each row of the pressure generation chambers 203. The communication portion 205 communicates with a reservoir portion provided on a protective substrate, which will be described later, and a common ink chamber of each pressure generation chamber 203. The reservoir 204 is configured. The communication unit 205
Are communicated with one end in the longitudinal direction of each pressure generating chamber 203 via an ink supply path 206.

A nozzle plate 208 having a nozzle 207 is fixed to the opening surface side of the flow path forming substrate 201 by an adhesive, a heat welding film, or the like. The nozzle plate 208 is, for example,
In this embodiment, it is made of stainless steel (SUS).

On the other hand, on the elastic film formed on the surface of the flow path forming substrate 201, for example, a lower electrode film made of a metal material such as platinum or iridium, and a piezoelectric body made of, for example, lead zirconate titanate (PZT) or the like. Piezoelectric element 2 comprising a layer and an upper electrode film made of a metal material such as iridium, for example
13 is formed.

A protective substrate 215 having a piezoelectric element holding portion 214 for protecting the piezoelectric element 213 is joined to a region facing the piezoelectric element 213 on the flow path forming substrate 201 on which the piezoelectric element 213 is formed. . Further, as described above, the protective substrate 215 is formed with a reservoir portion 216 that constitutes a reservoir 204 that communicates with the communication portion 205 of the flow path forming substrate 201 and serves as a common ink chamber for the pressure generating chambers 203. Yes.

A driving IC 217 for driving each piezoelectric element 213 is mounted on the protective substrate 215. Each terminal of the drive IC 217 is connected to a lead electrode drawn from the individual electrode of each piezoelectric element 213 through a bonding wire or the like (not shown). Each terminal of the driving IC 217 has a flexible printed cable (FPC) as shown in FIG.
) And the like, and various signals such as a print signal are supplied through the external wiring 218.

An area corresponding to the reservoir 204 on the protective substrate 215 includes, for example, a stainless material (S
A compliance substrate 219 made of US) is bonded. The compliance substrate 219 includes a flexible portion 22 in a region corresponding to the reservoir 204 that is thinner than other regions.
0 is provided, and the pressure change in the reservoir 204 is absorbed by the deformation of the flexible portion 220. The compliance substrate 219 includes a reservoir 20.
4 is formed. Ink inlet 221 communicating with 4 is formed.

A head case 223 made of, for example, a stainless material (SUS) is provided on the compliance substrate 219. The head case 223 is made of, for example, a stainless material (SUS). The ink supply passage 222 communicates with the ink introduction port 221 and communicates with the ink communication passage 102 of the cartridge case 100. It is joined.
Ink is supplied into the reservoir 204 through the ink communication path 102, the ink supply communication path 222, and the ink introduction port 221. In the present embodiment, a convex portion 225 is provided on the surface of the head case 223 opposite to the flow path forming substrate 201. Further, in the region facing the drive IC 217 in the convex portion 225, the head case 223 is provided.
A driving IC holding part 226 that penetrates the driving IC in the thickness direction is provided. Although not shown, the driving IC holding part 226 is filled with a potting agent so as to cover each driving IC 217.

The recording head main body 200 configured in this way fills the interior from the reservoir 204 to the nozzle 207 with ink, and then follows the recording signal from the drive IC 217 to generate the pressure generating chamber 2.
A voltage is applied to each piezoelectric element 213 corresponding to 03, and the elastic film 202 and the piezoelectric element 2 are applied.
13 is bent and deformed to apply pressure to the ink in each pressure generation chamber 203, thereby ejecting ink droplets from the opening of the nozzle 207.

The recording head main body 200 is bonded and fixed to the common fixing member 300 so that the recording head main bodies 200 are positioned at equal intervals from each other (FIGS. 1 to 3). reference). Here, referring to FIGS. 6 and 7 together with FIGS.
The recording head main body 200 and the common fixing member 300 will be described. FIG. 6 is a plan view and a front view of the common fixing member of the recording head main body of the present embodiment, and FIG. 7 is an enlarged cross-sectional view of a main part around the recording head main body and the common fixing member of the present embodiment.

As shown in the figure, the common fixing member 300 is a flat plate-like member, and each recording head main body 20.
Corresponding to 0, through portions 301 that penetrate in the thickness direction are provided. That is, a beam portion 302 is provided in a region corresponding to the common fixing member 300 between the recording head main bodies 200, and a through portion 301 is formed corresponding to each recording head main body 200. The beam portion 302 of the common fixing member 300 serves to prevent ink from entering and entering the drive IC 217 side of the recording head main body 200 and secures an adhesion region when adhering to the recording head main body 200. Has the function of

As shown in FIG. 7, each recording head main body 200 of this embodiment is joined to a common fixing member 300 by an adhesive 500. More specifically, each recording head body 200 includes:
The surface provided with the convex portion 225 of the head case 223 which is disposed in a position corresponding to the through portion 301 and is different from the nozzle surface 209 in a state where the convex portion 225 is inserted into the through portion 301 is bonded. The agent 500 is joined to the beam portion 302 and the outer frame portion of the common fixing member 300. Each recording head main body 200 has a common fixing member 300 in a state in which the nozzle surfaces 209 are aligned on the same plane by an adhesive 500 having a predetermined thickness for joining the recording head main body 200 and the common fixing member 300. It is joined to. The nozzle surface 209 is a surface on which the openings of the nozzles 207 that eject ink are arranged in parallel. The amount of the adhesive 500 is in accordance with the size of each recording head main body 200, specifically, the length of each substrate of each recording head main body 200 in the stacking direction. That is, the amount of the adhesive 500 between the recording head main body 200 and the common fixing member 300 provided with a longer length in the stacking direction of each substrate than the other recording head main bodies 200 due to dimensional errors at the time of manufacture is Adhesive 5 between the recording head main body 200 and the common fixing member 300
Less than 00 amount. Conversely, the amount of the adhesive 500 between the recording head main body 200 and the common fixing member 300 in which the length of each substrate in the stacking direction is shorter than the other recording head main bodies 200 due to dimensional errors during manufacturing. Is the common fixing member 30 with the other recording head main body 200.
More than the amount of adhesive 500 between zero. Thus, since the amount of the adhesive 500 is an amount corresponding to the size of each recording head body 200, the nozzle surfaces 209 are aligned on the same plane. Further, the convex portion 225 of the present embodiment protrudes from the opening of the penetrating portion 301 on the cartridge case 100 side, and the ink communication path 102 and the ink supply communication path 222 communicate with each other, and the adhesive 501 allows the cartridge case. 100.

The material of the common fixing member 300 is not particularly limited, but a portion joined to the common fixing member 300 of the recording head body 200, that is, a material having a linear expansion coefficient equal to or lower than that of the nozzle plate 208 is used. Is preferred. For example, in this embodiment, the material of the common fixing member 300 is stainless steel (S
US).

Further, around the plurality of recording head main bodies 200 fixed to the common fixing member 300 in this way, a cover head 4 for protecting the plurality of recording head main bodies 200 from ink or the like.
00 is provided. In this embodiment, the cover head 400 has a plurality of exposure openings 401 that expose the recording head bodies 200, but of course, one exposure opening that exposes the plurality of recording head bodies 200 is provided. You may make it have.

The cover head 400 is fixed to the cartridge case 100 in this embodiment. Specifically, as shown in FIGS. 2 and 3, the cover head 400 includes the recording head body 2.
A flange portion 403 is provided at the end on the 00 side, and the flange portion 403 includes the flange portion 4.
A fixing hole 404 penetrating 03 is provided. On the other hand, a protrusion 104 is provided on the surface of the cartridge case 100 on the recording head main body 200 side at a position corresponding to the fixing hole 404 of the cover head 400. Then, the protrusion 104 of the cartridge case 100 is inserted into the fixing hole 404 of the cover head 400, and the tip of the protrusion 104 is heated and caulked to fix the cover head 400 to the cartridge case 100.

Here, a manufacturing method of the recording head unit 1 as described above will be described with reference to FIG.
FIG. 8 is a cross-sectional view of the recording head main body and the common fixing member of the present embodiment.

First, each nozzle surface 20 from the opposite side to each nozzle surface 209 with respect to each recording head main body 200.
The nozzle surfaces 209 are aligned on the same plane by applying a pressing force in a direction toward 9 (alignment process). Specifically, as shown in FIG. 8A, a jig 60 having a flat work surface 601 on the upper surface.
0, and a plurality of recording head main bodies 200 are placed with the nozzle surface 209 facing each other on the jig 600. That is, in this embodiment, the pressing force in the direction from the opposite side to each nozzle surface 209 toward each nozzle surface 209 is gravity. Thereby, the nozzle surfaces 209 are very easily and reliably aligned on the same plane. Note that the convex portion 225 or the convex portion 2 is pressed with a pressing jig or the like.
When the surface provided with 25 is pressed, the nozzle surface 209 is more preferably aligned on the same plane. In addition, the relative positions of the plurality of recording head bodies 200 are adjusted, and an appropriate position /
The recording head main body 200 is placed in an appropriate direction, that is, at a position corresponding to the through portion 301 of the common fixing member 300. Here, on the work surface 601 of the jig 600, each recording head body 200 is provided.
In a state where the nozzles 207 are positioned with respect to each other, a recess 602 is provided at a position facing the area where the nozzle 207 is provided. By this recess 602, the nozzle 207 is not brought into contact with or brought into contact with the jig 600, and it is possible to reliably prevent the nozzle 207 from being deformed or the dirt of the jig 600 from moving and clogging the nozzle 207.

Next, the adhesive 500 is applied to at least one of the common fixing member 300 or the surface of the recording head main body 200 on which the convex portion 225 is provided (application step). At this time, it is preferable to apply more adhesive 500 than the minimum amount considered necessary for joining the common fixing member 300 and each recording head main body 200. Common fixing member 300 and each recording head body 2
This is because it can be reliably bonded to 00.

Next, the above-described nozzle surfaces 209 are maintained in a state where they are aligned on the same plane, that is, while the recording head main body 200 is placed on the work surface 601 of the jig 600, the protrusions 225 are passed through the through portions 3.
As shown in FIG. 8, the common fixing member 300 is assembled to the recording head body 200 so as to be inserted into the recording head body 200.
As shown in (b), the surface of the recording head body 200, which is a region different from the nozzle surface 209 of the recording head body 200, and the common fixing member 300 are bonded to each other with an adhesive 500 (bonding). Process). Actually, it is preferable to apply a pressing force in the direction toward the jig 600 to the common fixing member 300 using a pressing jig (not shown) from above. The pressing force at that time is preferably such that excess adhesive 500 is discharged from between the common fixing member 300 and each recording head main body 200. As a result, excess adhesive 500 is discharged from between the common fixing member 300 and each recording head main body 200, and the nozzle surface 209 is maintained in the same plane. Then, by solidifying the adhesive 500 while applying the pressing force in this way, the recording head unit 1 in which the nozzle surfaces are aligned on the same plane can be easily and reliably produced. It should be noted that the adhesive 500 between the common fixing member 300 and each recording head main body 200 is applied to each recording head main body 200 as described above by such a joining process.
The thickness and amount according to the size. Thereafter, although not shown, the cartridge case 100
And the cover head 400 are assembled to complete the recording head unit 1.

In the manufacturing method including the alignment process and the bonding process as described above, the adhesive 500 is used.
Since the common fixing member 300 is joined to each recording head main body 200 while keeping the nozzle surface 209 aligned on the same plane, the nozzle surfaces 209 of each recording head main body 200 can be surely aligned on the same plane. it can. Therefore, according to the above manufacturing method, it is possible to reliably prevent the nozzle surface 209 from being inclined with respect to the recording medium when assembled in the apparatus, and the landing position of the ink ejected from the nozzle 207 However, it is possible to manufacture the recording head unit 1 that can stably perform high-quality printing.

Further, in the above manufacturing method, the nozzle surface 209 is placed in contact with the work surface 601 of the jig 600 and the recording head main body 200 is placed, so that the nozzle surface 209 of the recording head main body 200 can be very easily placed on the same plane. Can be aligned. In addition, in the above manufacturing method, the region where the nozzle 207 is provided on each nozzle surface 209 of each recording head main body 200 is not brought into contact with the jig 600 by the recess 602, and the nozzle 207 is provided on each nozzle surface 209. Since the alignment process and the bonding process are performed by bringing a part other than the region in contact with the work surface 601, no pressing force is applied to the nozzle 207, and the deformation of the nozzle 207 can be reliably prevented. In addition, it is possible to reliably prevent the dirt of the jig 600 from moving and clogging the nozzle 207. Accordingly, it is possible to manufacture the recording head unit 1 that can stably perform high-quality printing at the landing positions of the ink ejected from the nozzles 207.

In the above manufacturing method, the adhesive 500 is applied to a certain extent, and the common fixing member 3 is applied.
The nozzle surface 209 is aligned on the same plane by a relatively easy procedure of applying a pressing force large enough to discharge excess adhesive 500 from between the recording head body 200 and the recording head main body 200 to the common fixing member 300. The recorded recording head body 200 can be manufactured. Therefore, according to the manufacturing method, the recording head unit 1 capable of performing high-quality printing with a high yield can be manufactured.

In the recording head unit 1 of the present embodiment, since the recording head main body 200 is disposed at a position corresponding to the through portion 301, for example, the through portion 301 of the common fixing member 300 of each recording head main body 200 at the time of manufacture. The nozzle surfaces 209 can be easily aligned on the same plane by pressing the portion corresponding to, specifically the convex portion 225. That is, according to the present embodiment, it is possible to easily realize the recording head unit 1 in which the nozzle surfaces 209 are aligned on the same plane. As a result, the landing position of the ink ejected from the nozzle 207 is stable, and high-quality printing can be reliably realized. Further, the recording head unit 1 of the present embodiment is particularly effective when it is desired to perform very precise printing because the nozzle surfaces 209 can be aligned on the same plane with very high accuracy.

In the present embodiment, the plurality of recording head main bodies 200 are joined to the common fixing member 300 by the adhesive 500 in an amount corresponding to the size of each recording head main body 200. Accordingly, the dimensional error of the recording head main body 200 is offset by the adhesive 500, and the nozzle surfaces 209 can be easily and reliably aligned on the same plane. Therefore, the landing position of the ink ejected from the nozzle 207 is stable, and high-quality printing can be realized.

In the present embodiment, the recording head main body 200 has a convex portion 225 having a common fixing member 30.
It is joined to the common fixing member 300 by the adhesive 500 in a state of being inserted into the zero penetration part 301. Thereby, since the recording head main body 200 is very firmly fixed to the common fixing member 300, the reliability of the product can be improved. The recording head body 20
Therefore, the common fixing member 300 is not sandwiched between the cartridge case 100 and the cartridge case 100, so that the head unit can be reduced in size and ink can be prevented from leaking from the joint of the flow path. Further, the adhesive 500 cancels out a dimensional error of the recording head main body 200, and the nozzle surfaces 209 can be easily and reliably aligned on the same plane.

(Embodiment 2)
FIG. 9 is a cross-sectional view of the recording head body and the common fixing member of the recording head unit according to the second embodiment of the invention. In addition, the same code | symbol is attached | subjected to the member same as Embodiment 1, and the overlapping description is abbreviate | omitted.

As shown in the figure, unlike the first embodiment, the recording head main body 200 </ b> A according to the present embodiment has no protrusion on the surface opposite to the nozzle surface 209. The recording head body 200A
Is disposed at a position corresponding to the penetrating portion 301, and is joined to one surface of the common fixing member 300 </ b> A by the adhesive 500 on the surface opposite to the nozzle surface 209. Note that the recording head main body 200 </ b> A is not inserted into the through portion 301. The thickness of the adhesive 500 is in accordance with the size of each recording head main body 200A, and each recording head main body 200A is joined by the adhesive 500, so that each nozzle surface 209 is flush with the same plane. Aligned. In the present embodiment, a communication path 303 is provided that penetrates the common fixing member 300A in the thickness direction. The ink communication path 102 of the cartridge case 100 and the ink supply communication path 222 of the recording head main body 200A are connected to each other. The communication path 303 communicates. The adhesive 500 is provided so as not to overlap the communication path 303 and the ink supply communication path 222.

Even in the configuration of the present embodiment as described above, the recording head main body 200 </ b> A has the penetrating portion 301.
For example, at the time of manufacture, each recording head main body 200 is disposed at a position corresponding to
Each nozzle surface 2 is pressed by pressing a portion corresponding to the through portion 301 of the common fixing member 300.
09 can be easily aligned in the same plane. That is, even with the configuration of the present embodiment, it is possible to easily realize the recording head unit 1 in which the nozzle surfaces 209 are aligned on the same plane. As a result, the landing position of the ink ejected from the nozzle 207 is stable, and high-quality printing can be reliably realized.

(Embodiment 3)
FIG. 10 is a cross-sectional view of the recording head body and the common fixing member of the recording head unit according to the third embodiment of the invention. In addition, the same code | symbol is attached | subjected to the member same as Embodiment 1, and the overlapping description is abbreviate | omitted.

As shown in the figure, unlike the first embodiment, the recording head main body 200 </ b> A according to the present embodiment has no protrusion on the surface opposite to the nozzle surface 209. The recording head body 200A
Are inserted into the penetrating portion 301 of the common fixing member 300 and disposed at a position corresponding to the penetrating portion 301, and the outer peripheral portion 227 of the inserted portion and the penetrating portion 301 of the common fixing member 300 are inserted.
Are joined with an adhesive 502, and the nozzle surfaces 209 are aligned in the same plane.

Even in the configuration of the present embodiment as described above, the recording head main body 200 </ b> A has the penetrating portion 301.
For example, at the time of manufacture, each recording head main body 200 is disposed at a position corresponding to
By pressing a portion corresponding to the through portion 301 of the common fixing member 300, specifically, the surface opposite to the nozzle surface 209, the nozzle surfaces 209 can be easily aligned on the same plane. That is, even with the configuration of the present embodiment, it is possible to easily realize the recording head unit 1 in which the nozzle surfaces 209 are aligned on the same plane. As a result, the landing position of the ink ejected from the nozzle 207 is stable, and high-quality printing can be reliably realized.

(Other embodiments)
As mentioned above, although each embodiment of this invention was described, this invention is not limited to each embodiment mentioned above including a structure, a material, etc.

For example, in the above-described embodiment, the alignment process and the bonding process are performed on the jig 600 having the concave portion 602. However, the concave portion 602 is not provided and the upper surface is a flat work surface 601. You may use tools. Alternatively, the side surfaces of the recording head main bodies 200 and 200A may be gripped so that the nozzle surfaces 209 are aligned on the same plane.

Further, in the present embodiment, the recording head main body 200,
Although the through portions 301 are respectively provided corresponding to 200A, the number of the through portions 301 is not particularly limited and may be one. That is, a configuration in which a plurality of recording head main bodies 200 and 200A are inserted into one through portion 301 may be employed. Moreover, although the penetration part 301 of embodiment mentioned above consisted of the through-hole, the shape as shown in FIG. 11 may be sufficient. FIG. 11 is a plan view of a common fixing member 300B according to another embodiment of the present invention. The common fixing member 300 </ b> B according to the present embodiment includes a through part 301 formed of a through hole and a notch-like through part 301 </ b> A that opens to one side. Thus, if the penetration parts 301 and 301A penetrate the common fixing member 300B in the thickness direction, the common fixing members 300, 300A,
There is no need to be surrounded by 300B, and the shape is not particularly limited.

Moreover, in embodiment mentioned above, although the common fixing member 300,300A, 300B was a flat plate-shaped member, the shape is not specifically limited, For example, it has a spherical form or there are unevenness | corrugations. Also good.

In the second embodiment, the communication path 303 is provided in the common fixing member 300A. However, the ink communication path 102 of the cartridge case 100 and the ink supply communication path 222 of the recording head main body 200A are provided in the penetrating portion 301. If the configuration is such that, for example, the communication path 3
03 may not be provided.

In the above-described embodiment, the flexural vibration type piezoelectric element is exemplified as the pressure generating element that applies pressure to the liquid in the pressure generating chamber. However, the pressure generating element is not particularly limited. For example, the piezoelectric material and the electrode It may be a longitudinal vibration type piezoelectric element that is alternately laminated with a forming material and expands and contracts in the axial direction, or may be a heating element or the like.

In the above-described embodiment, the present invention has been described by exemplifying an ink jet recording head unit that ejects ink droplets. However, the present invention is widely intended for all liquid ejecting head units. Examples of the liquid ejecting head include a recording head unit used in an image recording apparatus such as a printer, a color material ejecting head unit used in manufacturing a color filter such as a liquid crystal display, an organic EL display, and an FED (field emission display). Examples thereof include an electrode material ejection head unit used for electrode formation and a bioorganic matter ejection head unit used for biochip production.

Here, the recording head unit 1 is assembled in an ink jet recording apparatus as shown in FIG. FIG. 12 is a schematic diagram illustrating an example of an ink jet recording apparatus according to an embodiment of the present invention.

As shown in the figure, the ink jet recording apparatus is equipped with recording head units 1A and 1B. The recording head units 1A and 1B are detachably provided with cartridges 2A and 2B which constitute ink supply means, and a carriage. 3 is installed. The carriage 3 on which the recording head units 1A and 1B are mounted is provided on a carriage shaft 5 attached to the apparatus main body 4 so as to be movable in the axial direction. Then, the driving force of the driving motor 6 is transmitted to the carriage 3 via a plurality of gears and a timing belt 7 (not shown), so that the carriage 3 on which the recording head units 1A and 1B are mounted moves along the carriage shaft 5. Is done. On the other hand, the apparatus body 4 is provided with a platen 8 along the carriage shaft 5, and a recording sheet S, which is a recording medium such as paper fed by a paper feed roller (not shown), is conveyed on the platen 8. It is like that. A position corresponding to the home position of the carriage 3, that is,
Near one end of the carriage shaft 5, a cap member 9 that seals the nozzle surfaces of the recording head units 1A and 1B and a suction unit 10 that is connected to the cap member 9 and sucks the cap member 9 are provided. It has been. The cap member 9 seals the nozzle surfaces of the recording head units 1A and 1B to prevent the ink in the vicinity of the nozzles of the recording head units 1A and 1B from being dried, and for example, flushing that discharges ink droplets from the nozzles. It functions as an ink receiver during an operation or a suction operation in which the inside of the cap member 9 is sucked by the suction means 10 at a predetermined timing to forcibly discharge ink or the like from the nozzles. An ink jet recording apparatus equipped with such recording head units 1A and 1B is:
Due to the effects of the recording head unit as described above, high-quality printing can be realized.

FIG. 3 is an exploded perspective view of the recording head unit according to the first embodiment. 3 is an assembled perspective view of the recording head unit according to Embodiment 1. FIG. FIG. 3 is a cross-sectional view of a main part of the recording head unit according to the first embodiment. FIG. 3 is an exploded perspective view of the recording head body according to the first embodiment. FIG. 3 is a cross-sectional view of the recording head body according to the first embodiment. It is the top view and front view of a common fixing member which concern on Embodiment 1. FIG. 3 is a cross-sectional view of a main part of the recording head unit according to the first embodiment. FIG. 3 is a cross-sectional view of a main part of the recording head unit according to the first embodiment. FIG. 6 is a cross-sectional view of a main part of a recording head unit according to a second embodiment. FIG. 6 is a cross-sectional view of a main part of a recording head unit according to a third embodiment. It is a top view of the common fixing member which concerns on other embodiment of this invention. 1 is a schematic view of an ink jet recording apparatus according to an embodiment of the present invention.

Explanation of symbols

1, 1A, 1B recording head, 100 cartridge case, 200, 200A
Recording head body, 225 convex portion, 300, 300A, 300B common fixing member, 3
01, 301A Through part, 302 Beam part, 303 Communication path, 400 Cover head, 500, 501, 502 Adhesive, 600 Jig, 601 Work surface, 602
Recess

Claims (8)

A plurality of head bodies having a nozzle surface provided with nozzles for discharging liquid;
A common fixing member to which the plurality of head bodies are fixed;
The common fixing member is provided with a penetrating portion,
The liquid ejecting head unit, wherein the plurality of head main bodies are disposed at positions corresponding to the penetrating portions and joined to the common fixing member in a region different from the nozzle surface. The liquid ejecting head unit according to claim 1,
The liquid ejecting head unit, wherein the plurality of head main bodies are joined to the common fixing member by an amount of adhesive corresponding to the size of each head main body. The liquid ejecting head unit according to claim 1 or 2,
The common fixing member is a flat member,
The plurality of head main bodies each include a convex portion protruding from a surface opposite to the nozzle surface, and the convex portions are joined to the common fixing member with an adhesive while being inserted into the through portion. A liquid ejecting head unit. A liquid ejecting apparatus comprising the liquid ejecting head unit according to claim 1. A method for manufacturing a liquid ejecting head unit, comprising: a plurality of head bodies having nozzle surfaces provided with nozzles for discharging liquid; and a common fixing member to which the plurality of head bodies are fixed.
An alignment step of aligning the nozzle surfaces on the same plane by applying a pressing force in a direction toward the nozzle surface from the opposite side of the nozzle surface to the head body;
An application step of applying an adhesive to at least one of the plurality of head bodies or the common fixing member;
A joining step of joining the common fixing member to a region different from the nozzle surface of the head main body while maintaining a state in which the nozzle surfaces are aligned in the same plane. Production method. A method of manufacturing a liquid jet head unit according to claim 5,
The method of manufacturing a liquid jet head unit, wherein the alignment step and the joining step are performed by placing the nozzle surfaces of the plurality of head bodies on a flat work surface of a jig. A method of manufacturing a liquid jet head unit according to claim 5 or 6,
The method of manufacturing a liquid ejecting head unit, wherein in the joining step, joining is performed by discharging excess adhesive from between the common fixing member and the head main body. A method of manufacturing a liquid jet head unit according to any one of claims 5 to 7,
The method of manufacturing a liquid jet head unit, wherein the alignment step and the joining step are performed by bringing a portion of the nozzle surface other than the region where the nozzle is provided into contact with the work surface of the jig. .

Images