CN101422985A - Liquid ejecting head, method for making the same, and liquid ejecting apparatus - Google Patents

Abstract

The present invention provides a liquid ejection head, a method of manufacturing the liquid ejection head, and a liquid ejection device, which can reduce the size of the ejection head, reliably prevent liquid leakage, and reduce costs. The supply part (30) has: a filter mounting part (31) provided with a liquid supply path (36); (31) the supply body (32) that supplies; the filter (33) that is arranged between the filter installation part (31) and the supply body (32), between the filter installation part (31) and the supply body (32) An outer portion (34) is provided on the outer periphery of the filter mounting member (31) and the supply body (32), and the filter (33) is clamped between the filter mounting member (31) and the supply body (32). The part (31), the supply body (32) and the filter (33) are fixed integrally formed, and the outer part (34) is arranged on the filter mounting part (31) and the supply body of the filter (33). (32) Around the clamped area.

Description

Liquid ejection head, method of manufacturing the liquid ejection head, and liquid ejection device

Japanese Patent Application No. 2007-286681 and Japanese Patent Application No. 2008-033790 are cited by reference.

technical field

The present invention relates to a liquid ejection head for ejecting a liquid, a method for manufacturing the liquid ejection head, and a liquid ejection device provided with the liquid ejection head, and more particularly, to an ink jet recording head for ejecting ink as a liquid, a method for manufacturing the same, and an ink jet recording head. recording device.

Background technique

In an inkjet type recording head as a representative example of a liquid ejection head, ink is usually supplied from an ink cartridge, which is a liquid storage mechanism filled with ink, through an ink supply needle serving as an ink supply body detachably inserted into the ink cartridge. The ink channel formed on the supply member such as the ink cartridge case holding the ink cartridge supplies to the head main body, and the ink supplied to the head main body is ejected from the nozzle by a pressure generating mechanism such as a piezoelectric element provided on the head main body.

In this type of inkjet recording head, when the air bubbles present in the ink of the ink cartridge or the air bubbles mixed in the ink when the ink cartridge is attached or detached are supplied to the head main body, ejection interruptions such as drop-off of dots due to the air bubbles may occur. This kind of problem. In order to solve this problem, a filter for removing air bubbles and waste in the ink is provided between the ink supply needle inserted into the ink cartridge and the supply member (for example, refer to Patent Document 1).

In addition, such a filter and a supply member are fixed by heat welding or the like, and the ink supply needle and the supply member are fixed by ultrasonic welding or the like.

Patent Document 1: Japanese Patent Laid-Open No. 2000-211130

However, in the structure of Patent Document 1, since the filter is provided in the region where the ink supply needle of the supply member is fixed, an area corresponding to the area of the filter is required, and it is necessary to independently melt the ink on the supply member. Therefore, there is a problem that the distance between adjacent ink supply needles cannot be shortened, resulting in an increase in the size of the head.

In addition, in the structure of Patent Document 1, when the area of the filter is excessively reduced in order to realize the miniaturization of the shower head, the dynamic pressure will increase, so there is a need to increase the driving voltage for driving the pressure generating mechanism such as the piezoelectric element and the heating element. The problem.

In addition, such a problem exists not only in the inkjet type recording head, but also in the ejection head ejecting liquid other than ink.

Contents of the invention

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a liquid ejection head capable of downsizing the head, a method of manufacturing the same, and a liquid ejection device.

In order to achieve the above objects, the present invention provides a liquid ejection head comprising: a head body for ejecting liquid supplied from a liquid storage mechanism; and a liquid supply path for supplying the liquid from the liquid storage mechanism to the head body. supply part; characterized in that,

The supply member includes: a filter attachment member provided with the liquid supply path; a supply body for supplying the liquid to the filter attachment member; filter,

The supply is provided with an outer portion formed by integral molding of the filter mounting member, the supply body, and the filter, and the outer portion is provided on the Around the area where the filter mounting part and the supply body are clamped.

In such a form, the filter mounting member, the filter, and the supply body are fixed and integrated by the outer portion, thereby eliminating the need for an area for independently welding the supply body and the filter to the filter mounting member. , and the effective area of the filter can be enlarged, the interval between adjacent supply bodies can be shortened, and the shower head can be miniaturized.

Here, it is preferable that the filter protrudes to the outside of the region sandwiched by the filter mounting member and the supply body, and protrudes to the filter mounting member of the filter and the supply body. A part of the outer region of the region sandwiched by the body is sandwiched by the outer portion. Thereby, the filter can be reliably held by the outer portion, and it is possible to reliably prevent the filter from being curled and dropped.

In addition, it is preferable that a plurality of through-holes are provided in a region sandwiched by the outer portion of the filter. Accordingly, when forming the outer portion by integral molding, the outer portion can be reliably formed in a state of passing through the through-hole of the filter, thereby reliably sealing the liquid flow path and preventing liquid leakage.

In addition, it is preferable that, in a region corresponding to the outer portion of at least one peripheral edge portion of the filter mounting member and the supply body, there is provided a surface for sandwiching the filter on one side and its opposite side. Surface-connected through-holes. Thereby, at least one of the outer portion, the filter mounting member, and the supply can be integrally reinforced, and since the vent holes function as vent holes during molding, the outer portion can be formed satisfactorily.

In addition, it is preferable that the filter has a plurality of through-holes discontinuously provided in the circumferential direction from a region sandwiched between the filter attachment member and the supply body to an outer region thereof. Thus, by providing the through-hole on the filter, when the outer portion is formed by integral molding, the outer portion can be reliably formed around the liquid flow path, so that the liquid flow path can be reliably sealed, and liquid leakage can be prevented. leakage.

Moreover, it is preferable that the peripheral edge part of the said filter is sandwiched by the said filter attachment member and the said supply body. Thereby, it becomes possible to securely clamp to the peripheral edge part of a filter, and to prevent curling and fall-off of the peripheral edge part of a filter.

In addition, it is preferable that the filters are independently provided in a plurality of liquid supply paths. Thereby, even if a filter is provided independently, the function as a filter can be acquired.

In addition, it is preferable that the filter is continuously provided on a plurality of liquid supply paths. This eliminates the need for a step of cutting the filter to match its size, and reduces the number of components, thereby simplifying the manufacturing process.

In addition, another aspect of the present invention provides a liquid ejecting device including the liquid ejecting head described in the above aspect. Accordingly, a downsized and low-cost liquid ejecting device can be realized.

In addition, another aspect of the present invention provides a method of manufacturing a liquid ejection head including: a head body that ejects a liquid supplied from a liquid storage mechanism; and a liquid supply path that supplies the liquid to the head body. A supply part, the supply part includes: a filter mounting part provided with the liquid supply path; a supply body that supplies liquid to the filter mounting part; and is provided between the filter mounting part and the supply body between filters,

The method of manufacturing the liquid jet head is characterized in that,

clamping the filter between the filter mounting part and the supply body, and passing through the region clamped by the filter mounting part and the supply body of the filter in continuous The outer part is formed by integral molding, thereby integrally fixing the filter mounting member, the supply body, and the filter.

In such a form, the filter mounting member, the filter, and the supply body are fixed and integrated by the outer portion, thereby eliminating the need for separate welding of the supply body and the filter to the filter mounting member. area, the effective area of the filter can be enlarged, the distance between adjacent supply bodies can be shortened, and the nozzle can be miniaturized. In addition, it is not necessary to separately fix the filter and the supply body to the filter mounting member, so that the manufacturing cost can be reduced.

Description of drawings

FIG. 1 is a schematic perspective view of a recording device according to Embodiment 1 of the present invention.

2 is an exploded perspective view of the recording head according to Embodiment 1 of the present invention.

Fig. 3 is a plan view of a supply member according to Embodiment 1 of the present invention.

4 is an enlarged plan view of a main part of a supply member according to Embodiment 1 of the present invention.

5 is a cross-sectional view of a supply member according to Embodiment 1 of the present invention.

6 is a cross-sectional view showing a method of manufacturing a supply member according to Embodiment 1 of the present invention.

7 is a cross-sectional view illustrating a method of manufacturing a supply member according to Embodiment 1 of the present invention.

Fig. 8 is an exploded perspective view showing a head main body according to Embodiment 1 of the present invention.

9 is a cross-sectional view showing a head main body according to Embodiment 1 of the present invention.

10 is a cross-sectional view and a plan view of a supply member according to Embodiment 2 of the present invention.

Fig. 11 is a cross-sectional view of a supply member according to Embodiment 3 of the present invention.

12 is a cross-sectional view showing another example of a supply member according to another embodiment of the present invention.

Explanation of reference numbers

10 inkjet recording device (liquid ejection device), 11 inkjet recording head (liquid ejection head), 30 supply member, 31 supply member main body, 32 supply needle (supply body), 33 filter, 34 outer part, 35 Donor forming part (surface), 200 molds, 220 head body, 240 head cover

Detailed ways

Next, the present invention will be described in detail based on the present embodiment.

(Implementation Mode 1)

1 is a schematic perspective view of an inkjet recording device as an example of a liquid ejecting device according to Embodiment 1 of the present invention. As shown in FIG. 1, in an ink jet recording apparatus 10 of the present invention, an ink jet recording head (hereinafter referred to as a recording head) 11 as an example of a liquid ejection head for ejecting ink droplets is fixed on a carriage 12, and The recording head 11 is respectively detachably fixed with ink cartridges, which are liquid storage mechanisms for storing multiple inks of different colors such as black (B), gray (LB), cyanide (C), magenta (C), and yellow (Y). 13.

The carriage 12 on which the recording head 11 is mounted is provided on a carriage shaft 15 installed in the apparatus main body 14 so as to be able to move in the axial direction. Further, the driving force of the driving motor 16 is transmitted to the carriage 12 via a plurality of gears and a timing belt 17 not shown, whereby the carriage 12 can move along the carriage shaft 15 . On the other hand, a platen 18 is provided along the carriage shaft 15 on the apparatus main body 14 , and a recording medium S such as paper to be fed is conveyed on the platen 18 by a paper feeder (not shown) or the like.

In addition, at a position corresponding to the home position of the carriage 12, that is, near the end portion on one side of the carriage shaft 15, there is provided a gapping device 20 having a mechanism for sealing the nozzle forming surface of the recording head 11. Cap part 19. The cap member 19 seals the nozzle forming surface on which the nozzle openings are formed, thereby preventing ink from drying. In addition, the cap member 19 also functions as an ink container during the ejection operation.

Here, the recording head 11 of this embodiment will be described. In addition, FIG. 2 is a schematic perspective view of an ink jet recording head which is an example of a liquid ejecting head according to this embodiment.

As shown in FIG. 2, the recording head 11 is provided with: a supply member 30 such as an ink cartridge housing, which is a liquid storage mechanism, that is, an ink cartridge 13; The head cover 240 on the side of the liquid ejecting surface of the main body 220 .

First, the supply member 30 will be described in detail. In addition, FIG. 3 is a plan view of the supply member, FIG. 4 is an enlarged plan view of the main part of the supply member, and FIG. 5 is an AA' sectional view of FIG. 4 .

As shown in FIG. 5 , the supply member 30 includes: a filter attachment member 31 corresponding to a filter attachment member in this embodiment; a supply needle 32 as a supply body provided on one side of the filter attachment member 31; The filter 33 between the supply member main body 31 and the supply needle 32 ; the outer portion 34 provided on the outer circumference of the supply member main body 31 and the supply needle 32 .

The supply member 30 has a supply body forming portion 35 to which the aforementioned ink cartridge 13 (corresponding to the liquid storage mechanism described in the claims) is mounted on one side surface, respectively. Of course, it is also possible to introduce ink from the liquid storage mechanism to the supply body forming portion 35 via a tube without directly attaching the ink cartridge 13 to the supply body forming portion 35 .

In addition, a liquid supply path 36 is provided on the supply member main body 31 on the downstream side of the filter 33 described later. One end of the liquid supply path 36 is opened in each supply body forming portion 35 and the other end is opened on the head main body 220 side. , and is used to supply the ink from the ink cartridge 13 to the head main body 220 . In addition, a plurality of liquid supply paths 36 are arranged side by side along the longitudinal direction of the supply member main body 31 , and are provided independently for each ink cartridge provided for each ink color.

In addition, protrusions 37 are provided on the supply body forming portion 35 of the supply member main body 31 around the area where each liquid supply path 36 opens. And, this filter 33 is sandwiched between the protrusion 37 and the supply needle 32 .

The supply needle 32 as a supply body is fixed to the surface of the supply member main body 31 (supply body forming portion 35 ), and has a through passage 38 communicating with the liquid supply path 36 . The supply needle 32 is a member for supplying the ink supplied from the ink cartridge 13 to the supply member main body 31 .

In addition, the supply needle 32 has a flange portion 39 near the end portion on the side of the supply member main body 31 . On the flange portion 39, a convex portion 40 is provided in a region corresponding to the protrusion 37 of the supply member main body 31, so that the filter 33 is sandwiched between the protrusion 40 of the supply needle 32 and the protrusion 37 of the supply member main body 31. between.

In addition, in the present embodiment, the two supply needles 32 are integrated, whereby a single member integrating the two supply needles 32 is provided for the two liquid supply paths. That is, in this embodiment, as shown in FIG. 3 , five members are provided for ten liquid supply paths 36 (not shown).

In addition, a filter chamber 41 having a larger inner diameter than other regions, that is, a wide portion, is provided in a connection region between the through passage 38 of the supply needle 32 and the liquid supply path 36 . For example, in this embodiment, the filter chamber 41 is formed such that its inner diameter increases on the side of the supply member body 31 . In addition, the filter chamber 41 is formed to have a larger inner diameter than other areas of the through passage 38 in order to increase the area of the filter 33 and minimize the resistance when the ink passes through.

The filter 33 is, for example, a sheet-like member made of finely woven metal, and is sandwiched between the supply member main body 31 and the supply needle. In addition, in the present embodiment, the filter 33 has a size protruding outside the region sandwiched between the supply member main body 31 and the supply needle 32 . That is, the filter 33 is provided so as to protrude into the outer concave portion 42 partitioned by the protrusion portion 37 of the supply member body 31 and the convex portion 40 of the supply needle 32 .

Such a filter 33 may be provided independently for each liquid supply path 36 , or one filter 33 connected to each of a plurality of liquid supply paths 36 may be provided. In the present embodiment, one filter 33 is provided so as to be connected to all the liquid supply channels 36 , whereby the filter 33 is directed to the outer side defined by the protrusion 37 of the supply member main body 31 and the protrusion 40 of the supply needle 32 . The concave portion 42 protrudes inside. As described above, by disposing the filter 33 so as to protrude into the concave portion 42, the protruding region is sandwiched by the outer portion 34, which will be described in detail later, so that the filter 33 can be prevented from being curled and peeled off.

In addition, in the filter 33 , a plurality of through-holes 43 are discontinuously provided in a region sandwiched between the protrusion 37 of the supply member main body 31 and the protrusion 40 of the supply needle 32 . In the present embodiment, as shown in FIG. 4 , the area A sandwiched between the protrusion 37 of the supply member body 31 and the protrusion 40 of the supply needle 32 and the through-holes 43 opened outside are spaced at equal intervals. Ways are provided four around the liquid supply path 36 .

In this way, by providing the through-through 43 on the filter 33, the outer part 34 can be provided between the two integrated supply needles 32. The region A between the protrusions 40 of the supply needle 32 is formed by integral molding described in detail later. That is, when the outer portion 34 is integrally formed, the outer portion 34 can be filled with the filter 33 through the through-hole 43 of the filter 33 on the inside of the through-hole 43 in the area A between the supply member main body 31 and the supply needle 32. . Thereby, the outer portion 34 can be arranged at a position close to the boundary of the effective area. In addition, when the outer portion 34 is integrally formed, the outer portion 34 can be filled in the circumferential direction between the adjacent through-holes 43 in the area A between the supply member main body 31 and the supply needle 32 via the through-hole 43 of the filter 33. between. Thereby, the outer part 34 can be provided continuously around the liquid supply path 36, and the liquid supply path 36 can be reliably sealed, and ink leakage can be prevented.

In addition, by providing the through hole 43 in the filter 33 so as to open to the area A sandwiched by the supply member main body 31 and the supply needle 32 and the outside thereof, when forming the outer portion 34 by integral molding, the outer portion 34 The resin can easily flow in the vertical direction of the filter 33 through the through holes 43 .

The outer portion 34 is made of a resin formed integrally with the outer peripheries of the supply member main body 31 and the supply needle 32 . In the present embodiment, one outer portion 34 is provided around the boundary between the plurality of supply needles 32 and the supply member main body 31 .

Such an outer portion 34 is provided on the outer peripheries of the supply member body 31 and the supply needle 32 on the end surfaces of the supply member body 31 and the supply needle 32 and on the surface of the supply member body 31 and the supply needle 32 on the opposite side to the filter 33 . Thereby, the supply member main body 31 and the supply needle 32 can be fixed and integrated. That is, the outer portion 34 is formed by filling the concave portion 42 defined by the protrusion portion 37 of the supply member body 31 and the convex portion 40 of the supply needle 32, and is provided in a state of sandwiching the filter 33 protruding into the concave portion 42. .

In addition, as shown in FIG. 4 , the outer portion 34 is continuously provided in the region A sandwiched between the supply member main body 31 and the supply needle 32 of the filter 33 . That is, since the filter 33 of the present embodiment is made of finely woven metal, when the outer portion 34 is formed by integral molding, the pores of the filter 33 are filled with molten resin to be installed on the filter 33. between the protruding portion 37 of the supply member main body 31 and the convex portion 40 of the supply needle 32 .

Such outer portion 34 is integrally formed on the outer circumference of supply member body 31 and supply needle 32 , whereby supply member body 31 , supply needle 32 , and filter 33 can be fixed and supply member 30 can be integrated.

In this way, the supply member main body 31, the supply needle 32, and the filter 33 are integrated by the outer portion 34 formed by integral molding, thereby eliminating the need for welding the supply needle 32 and the filter 33 on the supply member main body 31. area, the interval between adjacent supply needles 32 can be shortened, and the head can be miniaturized. In addition, since the head is miniaturized, it is not necessary to reduce the area of the filter 33 to prevent an increase in dynamic pressure, and it is not necessary to increase the driving voltage for driving the piezoelectric element 300 .

In addition, by using the outer part 34, the filter 33 and the supply needle 32 can be fixed on the supply member main body 31 at the same time. cost.

In addition, since the supply member body 31 and the supply needle 32 are fixed by the outer portion 34 , it is possible to prevent a gap from being generated between the supply member body 31 and the supply needle 32 and to prevent ink from leaking through the gap.

In addition, in the present embodiment, the outer portion 34 is also filled into the filling hole 44 provided between the two integrated supply needles 32 and the communication hole 45 of the supply member main body 31 communicating therewith. The filling hole 44 and the communication hole 45 are provided along the liquid supply path 36 between the region where the protrusion 37 of the supply member main body 31 of the filter 33 and the protrusion 40 of the supply needle 32 face each other. That is, as in the present embodiment, when one outer portion 34 that integrates and continues a plurality of supply needles 32 is provided, by providing the filling hole 44 and the communication hole 45, the protrusion 37 of the supply member main body 31 and the supply needle can be formed. The outer portion 34 is formed between the opposing regions of the raised portion 40 of the outer portion 32 .

Here, a method of manufacturing the ink jet recording head 11, particularly the supply member 30, will be described in detail. 6 and 7 are cross-sectional views showing a method of manufacturing the supply member.

First, as shown in FIG. 6( a ), the filter 33 is sandwiched between the supply member main body 31 and the supply needle 32 . That is, the protruding portion 37 of the supply member body 31 and the convex portion 40 of the supply needle 32 are brought into contact with each other while the filter 22 is inserted.

Next, as shown in FIG. 6( b ), the mold 200 is fitted to the outer periphery of the boundary between the supply member main body 31 and the supply needle 32 . The mold 200 is composed of upper and lower parts, and a cavity 201 forming the outer portion 34 is provided inside. In addition, the mold 200 is provided with a gate 202 that communicates with the cavity 201 and the outside.

And, as shown in FIG. 7 , the outer portion 34 is formed by integral molding to form the supply member 30 . Specifically, the outer portion 34 is molded by filling the cavity 201 with molten resin through the gate 202 of the mold 200 . At this time, the molten resin filled in the cavity 201 is also filled in the micropores of the filter 33, thereby filling the area between the protrusion 37 of the supply member main body 31 and the convex portion 40 of the supply needle 32, that is, the area formed by the A region A (see FIG. 4 ) sandwiched between the supply member main body 31 and the supply needle 32 of the filter 33 .

Thereby, the outer part 34 is provided around the liquid supply path 36, and the supply member main body 31, the supply needle 32, and the filter 33 are fixed and integrated.

In addition, as described above, the filter 33 of the present embodiment is provided with the through hole 43, therefore, in the cavity 201 of the mold 200, the resin can easily flow in the vertical direction of the filter 33 through the through hole 43, and the Molten resin is easily filled into the mold 200 . In addition, by providing the through hole 43 in the filter 33 and filling the area between the protrusion 37 of the supply member body 31 and the protrusion 40 of the supply needle 32 with resin, the liquid supply path 36 can be sealed by the outer portion 34. .

The supply member 30 formed in this way does not require the process of welding the filter 33 and the supply needle 32 respectively on the supply member main body 31, and the supply member main body 31 and the supply needle 32 can be connected by one process of forming the outer part 34 by integral molding. And the filter 33 is fixedly integrated. Therefore, the manufacturing process can be simplified and the cost can be reduced.

In addition, the head main body 220 is provided on the other side of the liquid supply path 36 of the supply member 30 , that is, on the side opposite to the supply needle 32 . Here, the head main body 220 will be described. In addition, FIG. 8 is an exploded perspective view of the head main body, and FIG. 9 is a sectional view of the head main body.

As shown in the figure, in this embodiment, the flow path forming substrate 60 constituting the head main body 220 is composed of a single crystal silicon substrate, and an elastic film 50 composed of silicon dioxide is formed on one side thereof. On this flow path forming substrate 60 , two rows of pressure generating chambers 62 partitioned by a plurality of partition walls are formed by anisotropic etching from the other surface side and arranged side by side in the width direction. In addition, a communication portion 63 is formed outside the pressure generating chambers 62 of each row in the longitudinal direction. The communication portion 63 communicates with a storage portion 81 provided on a storage forming substrate 80 described later, and constitutes a common connection for each pressure generating chamber 62 . The reservoir (reservior) 100 of the ink chamber of the . In addition, the communication portion 63 communicates with one end portion in the longitudinal direction of each pressure generating chamber 62 via the ink supply path 64 . That is, in the present embodiment, the pressure generating chamber 62 , the communication portion 63 , and the ink supply path 64 are provided as the liquid path formed in the flow path forming substrate 60 .

In addition, the nozzle plate 70 forming the nozzle opening 71 is fixed to the opening surface side of the flow path forming substrate 60 via an adhesive 400 . Specifically, a plurality of nozzle plates 70 are provided corresponding to the plurality of head main bodies 220, and the nozzle plates 70 have a slightly wider area than the exposed opening 241 of the head cover 240 described in detail later, and are fixed with an adhesive. In the area overlapping with the cranium 240. In addition, the nozzle openings 71 of the nozzle plate 70 are penetratingly provided at positions communicating with the opposite sides of the ink supply paths 64 of the respective pressure generating chambers 62 . In the present embodiment, since two rows of pressure generating chambers 62 are provided on the flow path forming substrate 60 , one head body 220 is provided with two nozzle rows 71A in which nozzle openings 71 are arranged side by side. Furthermore, in the present embodiment, the surface where the nozzle opening 71 of the nozzle plate 70 opens is the liquid ejection surface A. As shown in FIG. Examples of such a nozzle plate 70 include a single crystal silicon substrate and metal substrates such as stainless steel (SUS).

On the other hand, on the opposite side of the opening surface of the flow path forming substrate 60, a piezoelectric body made of a lower electrode film made of metal and a piezoelectric material such as lead zirconate titanate (PZT) is formed on the elastic film 50. The piezoelectric element 300 is formed by sequentially laminating an upper electrode film made of a metal layer and a metal layer.

A reservoir forming substrate 80 having a reservoir portion 81 constituting at least a part of the reservoir 100 is bonded to the channel forming substrate 60 forming such a piezoelectric element 300 . In this embodiment, the storage portion 81 is formed in the width direction of the pressure generating chamber 62 through the storage forming substrate 80 in the thickness direction, communicates with the communication portion 63 of the flow path forming substrate 60 as described above, and is configured as each The reservoir 100 of the common ink chamber of the pressure generation chamber 62 .

In addition, a piezoelectric element holding portion 82 having a space not to hinder the movement of the piezoelectric element 300 is provided in a region facing the piezoelectric element 300 of the storage formation substrate 80 .

Furthermore, a drive circuit 110 is provided on the storage forming substrate 80 , and the drive circuit 110 is constituted by a semiconductor integrated circuit (IC) or the like for driving each piezoelectric element 300 . Each terminal of the drive circuit 110 is connected to a lead wire drawn from an individual electrode of each piezoelectric element 300 via a bonding wire (not shown) or the like. Furthermore, each terminal of the drive circuit 110 is connected to the outside through an external wiring 111 such as a flexible printed circuit board (FPC), and various signals such as printing signals are received from the outside through the external wiring 111 .

In addition, a compliance substrate 140 is bonded to such a storage forming substrate 80 . In a region of the flexible substrate 140 facing the reservoir 100 , an ink introduction port 144 for supplying ink to the reservoir 100 is formed penetrating in the thickness direction. In addition, the area other than the ink inlet 144 in the area facing the reservoir 100 of the flexible substrate 140 is a flexible portion 143 formed thinner in the thickness direction, and the reservoir 100 is sealed by the flexible portion 143 . The storage device 100 is endowed with flexibility by the flexible portion 143 .

In addition, the head case 230 is fixed on the flexible substrate 140 .

The head case 230 communicates with the ink inlet 144 and also communicates with the liquid supply path 36 of the supply member 30 , and is provided with an ink supply communication path 231 for supplying ink from the supply member 30 to the ink inlet 144 . In the head case 230 , the groove portion 232 is formed in a region facing the flexible portion 143 of the flexible substrate 140 so that the flexible portion 143 is flexibly deformed. In addition, on the head case 230 , a driving circuit holding portion 233 penetrating in the thickness direction is provided in a region facing the driving circuit 110 provided on the storage forming substrate 80 , and the external wiring 111 passes through the driving circuit holding portion 233 and is connected to the driving circuit holding portion 233 . The drive circuit 110 is connected.

In addition, as shown in FIG. 2 , the head main body 220 held by the supply member 30 via the head case 230 is relatively positioned and held by the box-shaped head cover 240 so as to cover the liquid ejection surface side of the four head main bodies 220 . The head cover 240 includes: an exposure opening 241 exposing the nozzle opening 71; Joint 242 .

In this embodiment, the joining portion 242 includes: a frame portion 243 provided along the outer periphery of the liquid ejection surface on the plurality of head bodies 220 ; and a beam extending between adjacent head bodies 220 and dividing the exposure opening 241 The portion 244 , the frame portion 243 and the beam portion 244 are bonded to the liquid ejection surface of the head body 220 , that is, the surface of the nozzle plate 70 .

Further, in the head cover 240 , the side wall portion 245 is extended in a curved form on the side surface of the liquid ejecting surface of the head main body 220 at the outer peripheral edge of the liquid ejecting surface.

In this way, the head cover 240 adheres the joint portion 242 to the liquid ejection surface of the head main body 220. Therefore, the steps between the liquid ejection surface and the head cover 240 can be reduced, and the liquid ejection surface can be frictionally contacted and suctioned. Prevents ink from remaining on the liquid ejection surface. In addition, since the space between the adjacent head main bodies 220 is blocked by the beam portion 244, ink cannot penetrate between the adjacent head main bodies 220, thereby preventing deterioration and destruction of the piezoelectric element 300 and the drive circuit 110 due to ink. . In addition, since the liquid ejection surface of the head body 220 and the head cover 240 are seamlessly bonded with an adhesive, it is possible to prevent the recording medium S from intruding into the gap, and to prevent deformation of the head cover 240 and paper jam. Furthermore, the side wall portion 245 covers the outer peripheral edge portions of the plurality of head main bodies 220 , thereby reliably preventing ink from flowing back to the side surfaces of the head main bodies 220 . In addition, since the head cover 240 is provided with the joint portion 242 that is joined to the liquid ejection surface of the head body 220 , each nozzle row 71A of the plurality of head bodies 220 can be positioned and joined with respect to the head cover 240 with high precision.

Examples of such head cover 240 include metal materials such as stainless steel, and may be formed by pressing a metal plate, or may be formed by forming. In addition, by making the head cover 240 a conductive metal material, it can be grounded. Furthermore, the bonding of the head cover 240 and the nozzle plate 70 is not particularly limited, and examples thereof include bonding with a thermosetting epoxy-based adhesive or an ultraviolet-curable adhesive.

The ink jet recording head 11 of this embodiment draws the ink from the ink cartridge 13 from the liquid supply path 36, passes through the ink supply communication path 231 and the ink introduction port 144, reaches the nozzle opening 71 from the reservoir 100, and fills the inside with ink. Then, according to the recording signal from the driving circuit 110, a voltage is applied to each piezoelectric element 300 corresponding to each pressure generating chamber 62, and the elastic film 50 and the piezoelectric element 300 are flexed and deformed, thereby raising the pressure in each pressure generating chamber 62. The pressure of the ink drop from the nozzle opening 71 is ejected.

(implementation mode 2)

Fig. 10 shows a cross section and a top surface of a supply member according to the second embodiment. In the supply member 30A of the present embodiment, a plurality of through-holes 46 are provided in a peripheral portion protruding in the outer portion 34A of the filter 33A. Also, in this embodiment, a plurality of supply needles are integrated to provide one continuous outer portion 34A, but in the region between the liquid supply paths 36 of the filter 33A, the region corresponding to the communication hole 45 is formed as a narrow ribbon-shaped communication portion. 47. As a result, the outer portion 34A is extended so as to surround the periphery of the communication portion 47 , and the liquid supply paths 36 are reliably sealed by the outer portion. In addition, a through hole 48 is also provided in the communicating portion 47 of the filter 33A. Accordingly, the periphery of the communicating portion 47 is reliably sealed by the outer portion 34A.

(Implementation Mode 3)

FIG. 11 shows a cross section of a supply member in the third embodiment. In the supply member 30B of this embodiment, the outer portion 34B exists in the region sandwiched between the supply member main body 31B and the supply needle 32B, and does not have an outer shape surrounding the periphery. However, in this case, the outer portion 34B also It is provided around the region sandwiched between the supply member main body 31B and the supply needle 32B of the filter 33B.

In addition, fine through holes 91 and 92 are provided on the periphery of the supply member main body 31B and the supply needle 32B relative to the outer portion 34B, penetrating from the clamping surface side of the filter 33B to the opposite side. These through-holes 91 and 92 are provided differently from the through-holes of the resin filled part, and they function as vent holes during the molding of the outer portion 34B, but after molding, they function as air vent holes for reinforcing the outer portion 34B, the supply member main body 31B, and the supply needle. The role of integration of 32B. Such through-holes 91 and 92 may be provided only in either one of the supply member main body 31B and the supply needle 32B, or may not be provided. The outer portion 34B is provided so as to surround the supply member main body 31B and the supply needle 32B, so that it can be fully integrated with the supply member main body 31B and the supply needle 32B without providing the through holes 91 and 92. In addition, the outer portion 34B is in direct contact with the mold during forming, so there is no need to provide vent holes.

(Other implementations)

As mentioned above, although embodiment of this invention was described, the basic structure of this invention is not limited to the said content.

For example, in the above-mentioned embodiment, the whole supply member main body 31 is constituted by the filter mounting member, but it is also possible to divide the supply member main body 31 by the filter 33 side and the head main body 220 side, and use the filter 33 side as a filter. Mounting components are integrated with the filter 33 and the supply needle 32 . In addition, in this case, the supply member 30 is configured by assembling the supply member main body 31 on the head main body 220 side to an integrated member.

In addition, in the above-mentioned embodiment, a member that integrates two supply needles 32 is provided, and one outer portion 34 is provided on the outer periphery of the plurality of supply needles 32 and the supply member main body 31, but it is not particularly limited, for example, As shown in FIG. 12 , the supply member main body 31C and the supply needle 32C may be independently provided, and the outer portion 34C may be provided on the respective outer peripheries of the supply member main body 31C and the supply needle 32C. In this case, as in the first embodiment described above, the outer portion 34C can be easily formed without providing the through-hole 43 in the filter 33C. Of course, the through hole 45 may also be provided as in the second embodiment. In addition, in the above-mentioned Embodiments 1 to 3, the ink jet type recording head having the supply member 30 having a plurality of supply needles 32 was exemplified, but it may be made to have only one supply needle 32 as shown in FIG. 12 . The inkjet type recording head of the supply unit 30, in short, the number and arrangement of the supply unit and the supply needles are not limited to those described above.

In addition, in the above-mentioned embodiment, the ink cartridge 13, which is the liquid storage mechanism, is provided in such a manner that it can be detachably attached to the supply member 30, but it is not particularly limited thereto. An ink cartridge is installed at a position where the liquid storage mechanism and the recording head 11 are connected via a supply pipe such as a tube. That is, in the above-mentioned embodiment, the needle-shaped supply needle 32 was exemplified as the supply body, but the supply body is not limited to the needle shape.

In addition, in the above-mentioned embodiment, the structure in which one head main body 220 is provided for the plurality of liquid supply paths 36 is exemplified, but a plurality of head main bodies may be provided for each ink color. In this case, each liquid supply path 36 communicates with each head body, that is, each liquid supply path 36 is provided so as to communicate with each nozzle row provided on each head body and provided with nozzle openings in parallel. Of course, the liquid supply path 36 may not communicate with each nozzle row, and one liquid supply path 36 may communicate with a plurality of nozzle rows. In addition, one nozzle row may be divided into two rows, and the liquid supply paths 36 may be communicated with each other. That is, it is only necessary for the liquid supply path 36 to communicate with a nozzle opening group composed of a plurality of nozzle openings.

In addition, in the above-mentioned embodiment, the present invention has been described with an example of the ink jet recording head 11 that ejects ink droplets, but the present invention is aimed at the liquid ejecting head as a whole. Examples of the liquid ejection head include recording heads used in image recording devices such as printers, colorant ejection heads used in the manufacture of color filters such as liquid crystal displays, and electrodes used in organic EL displays and FEDs (Field Emission Displays). Formed electrode material injection head, bio-organic injection head for biochip manufacturing, etc.

Claims (10)

1, a kind of jet head liquid, it possesses: spray the head main body of being stored the liquid of mechanism's supply by liquid; Be provided with from described liquid and store mechanism supplies with supply part from the liquid supply path of described liquid to this head main body; Described jet head liquid is characterised in that,

Described supply part possesses:

The filter installing component, it is provided with described liquid supply path;

Supply with body, it supplies with described liquid to described filter installing component;

Filter, it is arranged between described filter installing component and the described supply body,

Described supply part also is provided with the outside portion, integrally formed form of this outside portion by described filter installing component, described supply body and described filter are fixed, and this outside portion is set at by around the zone of the described filter installing component of described filter and the clamping of described supply body.

2, jet head liquid as claimed in claim 1 is characterized in that,

The outstanding outside that is arranged to by the zone of described filter installing component and the clamping of described supply body of described filter, and project to by the part in the zone in the outside in the zone of the described filtration installing component of this filter and the clamping of described supply body and utilize described outside portion to give clamping.

3, jet head liquid as claimed in claim 2 is characterized in that,

Zone in the described outside portion clamping that utilizes described filter is provided with a plurality of through holes.

4, jet head liquid as claimed in claim 1 or 2 is characterized in that,

With the corresponding zone, outside portion of the circumference of at least one side of described filter installing component and described supply body, be provided with the through hole that the face with the face of a side of clamping filter and its opposition side is communicated with.

5, jet head liquid as claimed in claim 1 or 2 is characterized in that,

In the described filter, to be discontinuous mode along Zhou Fangxiang a plurality of through holes are being set from zone to the zone outside it by described filter installing component and the clamping of described supply body.

6, jet head liquid as claimed in claim 1, wherein,

The circumference of described filter is by described filter installing component and the clamping of described supply body.

7, as each described jet head liquid in the claim 1～6, it is characterized in that,

Described filter is arranged at a plurality of liquid supply paths respectively independently.

8, as each described jet head liquid in the claim 1～6, it is characterized in that,

Described filter is arranged on a plurality of liquid supply paths continuously.

9, a kind of liquid injection apparatus is characterized in that,

Described liquid injection apparatus possesses each described jet head liquid in the claim 1～8.

10, a kind of manufacture method of jet head liquid, described jet head liquid possesses: spray the head main body of being stored the liquid of mechanism's supply by liquid; Be provided with supply part from the liquid supply path of described liquid to this head main body that supply with, described supply part possesses: the filter installing component that is provided with described liquid supply path; Supply body to described filter installing component feed fluid; Be arranged on the filter between described filter installing component and the described supply body,

The manufacture method of described jet head liquid is characterised in that,

Described filter is clamped between described filter installing component and the described supply body, and, form described outside portion by integrally formed in a continuous manner in zone by the described filter installing component of described filter and the clamping of described supply body, thus integrated fixing described filter installing component, described supply body and described filter.

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