CN109228658A - Liquid ejecting head and liquid injection apparatus - Google Patents

Abstract

Present invention offer can make spue stability-enhanced liquid ejecting head and liquid injection apparatus.Include first chip and second chip along Y-direction stacking；First flow path component configures along -Y direction relative to first chip, and has the first ink flow path for being connected to first chip；And second flow path component (51B), it is configured relative to second chip along +Y direction, and there is the second ink flow path (155) for being connected to second chip, in first flow path component, it is formed with the first bubble discharge duct for making the inside and outside connection of the first ink flow path, in second flow path component (51B), it is formed with the second bubble discharge duct (160) of the inside and outside connection for making the second ink flow path (155).

Description

Liquid ejecting head and liquid injection apparatus

Technical field

The present invention relates to liquid ejecting head and liquid injection apparatus.

Background technique

All the time, as the ink to the recorded mediums discharge droplet-like such as recording sheet, to be recorded to recorded medium There is the ink-jet printer for having ink gun in the device of image, character.Ink gun is, for example, by multiple injections corresponding with colors Module is equipped on balladeur train and constitutes.

Above-mentioned injection module have by discharge ink head chip, be formed with the ink flow path of correct chip supply ink Manifold etc..For example, disclose in following patent literature 1 in order to realize high-resolution printing, high speed printing etc., it will be multiple Head chip carrying projects the composition of module in one.

Existing technical literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2010-208226 bulletin.

Summary of the invention

Subject to be solved by the invention

But air is involved in during ink flow path circulates if existing by ink, is become bubble and is stranded in ink The case where.If bubble reaches head chip, filling of the ink in each head chip is become inadequate, and ink is spat from nozzle bore Become out unstable.

The present invention is to complete in view of this situation, and its purpose is to provide can make the stability-enhanced liquid that spues Injector head and liquid injection apparatus.

Solution for solving the problem

To solve the above-mentioned problems, liquid ejecting head involved in a mode of the invention include along first direction stacking and Spray first chip and second chip of liquid；First flow path component, in aforementioned first direction, relative to aforementioned One chip is configured at the side opposite with aforementioned second chip, and has the first liquid for being connected to aforementioned first chip Body flow path；And second flow path component is configured at and aforementioned in aforementioned first direction relative to aforementioned second chip The opposite side of one chip, and there is the second liquid flow path for being connected to aforementioned second chip, in aforementioned first flow path In component, it is formed with the first bubble discharge duct for making the inside and outside connection of aforementioned first liquid flow path, in aforementioned second flow path portion In part, it is formed with the second bubble discharge duct of the inside and outside connection for making aforementioned second liquid flow path.

According to this constitution, the bubble being detained in the first liquid flow path and second liquid flow path can be arranged by first bubble Out flow path and the second bubble discharge duct and be discharged respectively.Therefore, it is able to suppress bubble to enter in each head chip, and liquid is made to exist The fillibility of each head chip improves.Thereby, it is possible to improve jetting stability.

In the liquid ejecting head involved in aforesaid way, it can also be that aforementioned first chip has to give liquid and press The first pressure of variation changes room, and there is aforementioned second chip the second pressure for giving pressure oscillation to liquid to change room, In aforementioned first chip and aforementioned second chip, equipped be formed with respectively be connected to aforementioned first pressure change room and Aforementioned second pressure changes the injection orifice plate of the spray-hole of room,

Among aforementioned injection orifice plate, in the jet face of aforementioned spray-hole opening, it is connected to aforementioned first bubble discharge duct First tap and the second tap opening for being connected to aforementioned second bubble discharge duct.

According to this constitution, due to spray-hole and each tap on the same face (jet face) upper opening, therefore for example in liquid Filling when, printing work stopping when, in the case where jet face is sealed by cap etc., can be realized spray-hole through a cap And each tap covers together.Therefore, it is possible to realize the raisings of maintainability.

In the liquid ejecting head involved in aforesaid way, it can also be that aforementioned first flow path component has the confession of liquid To the inflow port that source is connected with aforementioned first liquid flow path, aforementioned first flow path component and aforementioned second flow path component it Between, configured with making be connected to flow path of aforementioned first liquid flow path with aforementioned second liquid fluid communication, aforementioned second tap Internal diameter is smaller than the internal diameter of aforementioned first tap.

In second liquid flow path, a part of the liquid in the first liquid flow path is supplied to by being connected to flow path.? The situation, second liquid flow path due to relative to the first liquid flow path and be located at downstream side, thus in the first liquid flow path Pressure is compared and easily becomes high pressure.

Then, according to the method, by keeping the internal diameter of the second tap smaller than the internal diameter of the first tap, so as to make It is higher than the surface tension of the inner surface effect in the first tap in the surface tension that the inner surface of the second tap acts on.By This, becomes easy meniscus stability in the second tap, is able to suppress liquid and is unexpectedly leaked out by the second tap.

In addition, by making meniscus stability in the second tap, so as to inhibit in the use of liquid ejecting head (when liquid injection etc.), such as meniscus are destroyed, extraneous gas (air) due to the negative pressure that generates in second chip Entered in second chip by the second tap.Therefore, being able to suppress the air entered from the second tap becomes bubble And it is stranded in a chip, and improve jetting stability.

In the liquid ejecting head involved in aforesaid way, it can also be that aforementioned second chip has to give liquid and press The second pressure of variation changes the jeting area that room is arranged along the second direction intersected with aforementioned first direction, aforementioned company Through-flow road one is configured at the part for being located at two sides relative to aforementioned jeting area, aforementioned second gas in aforementioned second direction over the ground The central portion steeped between the aforementioned connection flow path of a pair of discharge duct in aforementioned second direction is connected to aforementioned second liquid flow path.

According to the method, mutually comparably set from the distance of each connection flow path to the second bubble discharge duct.Therefore, It can will be stranded in during liquid circulates in second liquid flow path from the central portion of each connection flow path to second direction Bubble in second liquid flow path is equably squeezed out from the two sides of second direction towards the second bubble discharge duct.Thereby, it is possible to more Bubble is reliably suppressed to enter in second chip.

In the liquid ejecting head involved in aforesaid way, it can also be in aforementioned second bubble discharge duct, be configured with Filter the filter of liquid.

According to the method, increased and making the flow path resistance in the second bubble discharge duct due to filter, so as to Enough the second bubble discharge streams inhibited due to the flowing due to the liquid from upstream, the injection of liquid from nozzle bore etc. Pressure oscillation in road, and the meniscus in the second tap is destroyed.Become meniscus stability in the second tap as a result, It must be easy, be able to suppress liquid and unexpectedly leaked out by the second tap.

Liquid injection apparatus involved in a mode of the invention has liquid ejecting head involved in aforesaid way.

According to the method, it is capable of providing the liquid injection apparatus of discharge excellent performance.

The effect of invention

A mode according to the present invention can be such that discharge stability improves.

Detailed description of the invention

Fig. 1 is the summary composition figure of ink-jet printer involved in embodiment；

Fig. 2 is the perspective view of ink gun involved in embodiment；

Fig. 3 is in the ink gun involved in embodiment, by the perspective view of a part decomposition；

Fig. 4 is the exploded perspective view of substrate parts and the first injection module in the ink gun involved in embodiment；

Fig. 5 is the first exploded perspective view for projecting module involved in embodiment；

Fig. 6 is the exploded perspective view of spitting unit involved in embodiment；

Fig. 7 is the sectional view of the VII-VII line along Fig. 6；

Fig. 8 is the exploded perspective view being unfolded from first flow path plate to +Y direction in the first flow path component involved in embodiment；

Fig. 9 is the front view of the first flow path plate involved in embodiment in terms of +Y direction；

Figure 10 is the sectional view that module is projected with the X-X line of Fig. 8 comparable first；

Figure 11 is the portion the XI enlarged drawing of Figure 10；

Figure 12 is the exploded perspective view being unfolded from first flow path plate to -Y direction in the first flow path component involved in embodiment；

Figure 13 is the front view of the second flow path plate involved in embodiment in terms of +Y direction；

Figure 14 is the sectional view along the XIV-XIV line of Fig. 2.

Specific embodiment

Hereinafter, being described with reference to embodiment according to the present invention of the invention.In the following embodiments, benefit is lifted It is illustrated for the ink-jet printer (hreinafter referred to as printer) recorded with ink (liquid) to recorded medium. In addition, for the size that identify each component can, suitably changing each component in the attached drawing used in the following description Scale bar.

[printer]

Fig. 1 is the summary composition figure of printer 1.

As shown in Figure 1, the printer 1 of present embodiment has a pair of of conveyer 2,3, ink supplying mechanism 4, ink gun 5A, 5B and sweep mechanism 6.In addition, in the following description, being said as needed using the rectangular coordinate system of X, Y, Z It is bright.In this case, the carriage direction (sub-scanning direction) one of X-direction (second direction) and recorded medium P (for example, paper etc.) It causes.The scanning direction (main scanning direction) of Y-direction (first direction) and sweep mechanism 6 is consistent.Z-direction indicates and X-direction and Y The orthogonal short transverse in direction (gravity direction).It in the following description, will be in figure among X-direction, Y-direction and Z-direction Arrow direction is illustrated as positive (+) direction using the direction opposite with arrow as negative (-) direction.In the present embodiment, +Z direction is equivalent to the top of gravity direction, and -Z direction is equivalent to the lower section of gravity direction.

Conveyer 2,3 transports recorded medium P along +X direction.Extend specifically, conveyer 2 has along Y-direction The grid roller (grid roller) 11 of setting, with grid roller 11 extend parallel to setting pinch roller (pinch roller) 12, And the driving mechanisms such as motor for being pivoted grid roller 11 (not shown).Similarly, conveyer 3 has prolongs along Y-direction The grid roller 13 of setting is stretched, the pinch roller 14 of setting is extended parallel to grid roller 13 and is pivoted grid roller 13 Driving mechanism (not shown).

Ink supplying mechanism 4 has the ink storage tank 15 for accommodating ink and connects ink storage tank 15 and ink gun 5A, 5B The ink piping 16 connect.

In the present embodiment, ink storage tank 15 is arranged with multiple in X direction.In each ink storage tank 15, accommodate respectively Such as Huang, fuchsin, blueness, this black four chromatic ink.

Ink piping 16 is, for example, with flexible flexible hose.Ink is piped 16 for each ink storage tank 15 and each ink-jet It is connected between head 5A, 5B.

Sweep mechanism 6 makes ink gun 5A, and 5B is along Y-direction shuttle-scanning.Prolong specifically, scanning element 6 has along Y-direction Stretch setting a pair of guide rails 21,22, by balladeur train 23 that a pair of guide rails 21,22 supports in a manner of it can move and make balladeur train 23 driving mechanisms 24 moved along Y-direction.

Between the guide rail 21,22 of the configuration of driving mechanism 24 in the X direction.Driving mechanism 24 has separate in the Y direction between Every ground configuration a pair of of pulley 25,26, the endless belt 27 that is wound between a pair of of pulley 25,26 and make a pulley 25 Carry out the drive motor 28 of rotation driving.

Balladeur train 23 is linked to endless belt 27.Multiple ink gun 5A, 5B are equipped on balladeur train in the state of arranging along Y-direction 23.Each ink gun 5A, 5B are constituted in can the spue mode of ink of two kinds of colors of each ink gun 5A, 5B.Therefore, at this In the printer 1 of embodiment, each ink gun 5A, 5B spue the inks of two kinds of mutually different colors respectively, thus with can Spue Huang, fuchsin, blueness, this black four chromatic ink mode constitute.

<ink gun>

Fig. 2 is the perspective view of ink gun 5A.Fig. 3 is in ink gun 5A, by the perspective view of a part decomposition.In addition, ink gun 5A, 5B are formed by same constitute other than the color for the ink being supplied to.Therefore, in the following description, about ink-jet Head 5A is illustrated, and omits the explanation of ink gun 5B.

As shown in Figure 2 and Figure 3, the ink gun 5A of present embodiment is to project module 30A, 30B (referring to Fig. 3), damper 31, nozzle plate 32 (referring to Fig. 2), nozzle guard part 33 etc. are equipped on substrate parts 38 and constitute.

(substrate parts)

Fig. 4 be ink gun 5A in, substrate parts 38 and first project module 30A exploded perspective view.

As shown in figure 4, substrate parts 38 are formed as using Z-direction as thickness direction, and using X-direction as longer direction Plate.Substrate parts 38 have the substrate body portion 41 for keeping each injection module 30A, 30B and for consolidating substrate parts 38 Due to the balladeur train fixed part 42 of balladeur train 23 (referring to Fig.1).In addition, in the present embodiment, substrate parts 38 are by metal material one Formed to body.

In substrate body portion 41, it is formed with module receiving portion (the first module receiving portion 44A and the second module receiving portion 44B).Each module receiving portion 44A, 44B and injection module 30A, 30B are accordingly formed with two column along Y-direction.Each module receiving portion 44A, 44B run through substrate body portion 41 along Z-direction.Corresponding injection module 30A, 30B are able to be inserted into each module receiving portion 44A,44B.That is, projecting module 30A, 30B is inserted into each module receiving portion 44A, 44B by -Z direction end, thus from base Bottom parts 38 are kept in the state that +Z direction erects by substrate body portion 41.

It is formed in the part between each module receiving portion 44A, 44B in substrate body portion 41 and accommodates each module The separating part 46 that portion 44A, 44B separate.Opposite a pair of short edges portion 45a, 45b in the X-direction in substrate body portion 41 are formed Have towards the inside of X-direction highlighted wall 47 outstanding.Highlighted wall 47 and highlighted wall 47 opposite in the X direction are with each other as one Group is formed in each module receiving portion 44A, each of 44B.

The first force application part 48 is equipped in the first short leg 45a.First force application part 48 corresponds to each module receiving portion 44A, 44B and be arranged.Each first force application part 48 is formed as being respectively interposed in the first short leg 45a and each injection module portion 30A, It is leaf spring like between 30B.Each first force application part 48 is by each injection module portion 30A, and 30B is towards the second (side-X short leg 45b To) and exert a force.

Balladeur train fixed part 42 is stretched out from the +Z direction end in substrate body portion 41 to X/Y plane.In balladeur train fixed part 42, shape At the mounting hole etc. having for substrate parts 38 to be installed on to balladeur train 23 (referring to Fig.1).

(projecting module)

As shown in figure 3, projecting module 30A, 30B is formed as using Y-direction as the plate of thickness direction.Project module 30A, 30B It is constituted in a manner of it can will spue from the ink that ink storage tank 15 (referring to Fig.1) supplies towards recorded medium P.Project module 30A, 30B are carried on substrate parts 38 along Y-direction interval.

In the ink gun 5A of present embodiment, module 30A is being projected, among 30B, is being spued a kind of face with each injection module The ink of color.In addition, be mounted in the quantity of injection the module 30A, 30B of substrate parts 38, from project module 30A, 30B spue Color, type of ink etc. can be changed suitably.Each to project module 30A, 30B constitutes the injection module formed by identical Substrate parts 38 are equipped on mutually opposite direction along Y-direction each other.Therefore, in composition below, mould is projected by first Block 30A is illustrated as an example.

Fig. 5 is the exploded perspective view of the first injection module 30A.

As shown in figure 5, first injection module 30A mainly have spitting unit 50 and by spitting unit 50 be clipped in them it Between in the state of opposite first flow path component 51A and second flow path component 51B in the Y direction.

(spitting unit)

Fig. 6 is the exploded perspective view of spitting unit 50.

As shown in fig. 6, spitting unit 50 has first chip 52A, and relative to first chip 52A along +Y direction layer Second folded chip 52B.Each head chip 52A, 52B are to spit from the end of the extending direction (Z-direction) in aftermentioned discharge channel 57 Ink out, so-called side penetrates the head chip of type (edge shoot type).

First chip 52A is overlapped along Y-direction by the first actuator plate 55 and the first cover board 56 and is constituted.

First actuator plate 55 is by the piezoelectric substrate of the formation such as PZT (lead zirconate titanate).First actuator plate 55 is pole Change direction through-thickness (Y-direction) uniaxially to set.In addition, the first actuator plate 55 can also be by polarization direction in the Y direction Upper different two panels piezoelectric substrate is laminated and forms (so-called chevron (chevron) type).

Towards the face of -Y direction (hereinafter referred to as " surface ") among the first actuator plate 55, interval is simultaneously in X direction Column are provided with multiple channels 57,58 of opening.Each channel 57,58 is formed as linear along Z-direction respectively.Each channel 57,58 exists The -Z direction end face upper opening of first actuator plate 55.In addition, each channel 57,58 can also obliquely extend relative to Z-direction.

Fig. 7 is the sectional view of the VII-VII line along Fig. 6.

As shown in Figure 6, Figure 7, above-mentioned multiple channels 57,58 are to be filled the discharge channel 57 of ink and be not filled The non-discharge channel 58 of ink.Discharge channel 57 and non-discharge channel 58 are alternately arranged configuration in the X direction.Each channel 57,58 are separated in X direction respectively by the driving wall 61 formed by the first actuator plate 55.In addition, the interior table in channel 57,58 Face is formed with driving electrodes 59.Driving electrodes 59 are to be connected to be formed in the +Z direction end of the first actuator plate 55 The drive terminal (not shown) on the surface of one actuator plate 55.

First cover board 56 is being formed as rectangular shape from the plan view in terms of Y-direction.First cover board 56 makes the first rush The surface (referring to Fig.1 0) of the first actuator plate 55 is engaged in the state that the +Z direction end of dynamic device plate 55 is prominent.

First cover board 56 has in the common ink water chamber 62 being open towards the face of -Y direction (hereinafter referred to as " surface "), with And in the multiple slits 63 being open towards the face of +Y direction (hereinafter referred to as " back side ").

Common ink water chamber 62 is formed in position corresponding with the +Z direction end in discharge channel 57 in z-direction.Common ink Water chamber 62 is recessed from the surface of the first cover board 56 towards +Y direction, and is extended in X direction.Ink passes through above-mentioned first-class Circuit unit 51A flows into common ink water chamber 62.

Slit 63 is formed in and the opposite position in the Y direction of discharge channel 57 among common ink water chamber 62.Slit 63 It will be connected to severally in common ink water chamber 62 in each discharge channel 57.Therefore, non-discharge channel 58 not with common ink water chamber 62 Interior connection.

Among the first cover board 56, than common ink water chamber 62 more in the part in the outside of X-direction, it is formed with a pair of the One bubble venting hole 65A.Each first bubble venting hole 65A is after running through the first cover board 56 along Y-direction, along -Z direction first Extend between cover board 56 and the first actuator plate 55.That is, the first opening portion is in the first cover board 56 in first bubble venting hole 65A Surface opening, the second opening portion is open in the -Z direction end face of first chip 52A.

Second chip 52B is overlapped along Y-direction by the second actuator plate 71 and the second cover board 72 and is constituted.Below It in explanation, similarly constitutes, is accompanied by identical with first chip 52A with first chip 52A about in second chip 52B Symbol simultaneously omits the description.

Second actuator plate 71 is engaged among the first actuator plate 55 towards the face of +Y direction (hereinafter referred to as " back Face ").The discharge channel 57 and non-discharge channel 58 of second chip 52B relative to first chip 52A discharge channel 57 and The arrangement spacing in non-discharge channel 58 arranges with being staggered half of spacing.That is, the discharge channel 57 of each head chip 52A, 52B each other with And non-discharge channel 58 be arranged as separately from each other it is staggered.

Second cover board 72 is engaged in the face (hereinafter referred to as " surface ") towards +Y direction in the second actuator plate 71. Among the second cover board 72, at least more it is located in the part of +X direction than common ink water chamber 62, is formed with the second bubble venting hole 65B.Second bubble venting hole 65B after the second cover board 72, promotees along -Z direction in the second cover board 72 and second along Y-direction Extend between dynamic device plate 71.

In spitting unit 50, the region in channel 57,58 will be arranged with as discharge region Q1, it will be relative to discharge region Q1 Region (than the region of outermost 57,58 more lateral of channel) positioned at the two sides of X-direction is as a pair of non-discharge region Q2.Non- In the Q2 of discharge region, be formed with along Y-direction through spitting unit 50 (each head chip 52A, 52B) intercommunicating pore 73 (in Fig. 6,7, The intercommunicating pore 73 of side is only shown).Intercommunicating pore 73 is along Y-direction through each head chip 52A, 52B (actuator plate 55,71 and lid Plate 56,72), so that a common ink water chamber 62 of chip 52A, 52B is communicated with each other.In addition, the quantity of intercommunicating pore 73, position, shape Etc. can suitably change.

(first flow path component)

Fig. 8 is the exploded perspective view of expansion from first flow path plate 77 to +Y direction in first flow path component 51A.

As shown in figure 8, first flow path component 51A has the first manifold 75 and flows into port 76.In addition, the first manifold 75 and flow into port 76 can be with integrally formed.

First manifold 75 is integrally formed as using Y-direction as the plate of thickness direction.As shown in figure 3, the first manifold 75 are inserted into the first above-mentioned module receiving portion 44A in the state of erecting to +Z direction by basal part by -Z direction end Part 38 is kept.

As shown in figure 8, the first manifold 75 has first flow path component 77, configures relative to first flow path plate 77 along +Y direction Front cover 78 and the rear cover 79 that is configured relative to first flow path plate 77 along -Y direction.

First flow path plate 77 is formed by the outstanding material of heat conductivity.In the present embodiment, in first flow path plate 77 In material, it is preferred to use metal material (for example, aluminium etc.).In first flow path plate 77, ink is formed with towards first chip 52A First ink flow path 81 of circulation.

Fig. 9 is the front view of the first flow path plate 77 in terms of +Y direction.

As shown in Figure 8, Figure 9, the first ink flow path 81 is upstream flow path 83, filtering flow path 84, downstream flow path 85 and supplies It is connected to flow path 86 (referring to Fig.1 1) and is formed.

Upstream flow path 83 is to be open in first flow path plate 77 to +Y direction.Specifically, upstream flow path 83 has narrow width Flow path 91 and the connection flow path 92 that will be connected between narrow width flow path 91 and filtering flow path 84.

Narrow width flow path 91 will be located at the part of the +X direction in first flow path plate 77 and +Z direction as upstream end, And by the part of the central portion of Z-direction and X-direction in first flow path plate 77 as downstream, gone with from upstream end It is bent and extends toward downstream.Specifically, narrow width flow path 91 from upstream end after -Z direction extension, with going to the side-Z Extend to along -X direction, further extends along -Z direction.In the present embodiment, narrow width flow path 91 flow path width (with Circulating direction and the width in the orthogonal direction of Y-direction) and flow path depth (depth in the Y direction) throughout it is whole and equally Setting.But shape, flow path width, the flow path depth of narrow width flow path 91 can be changed suitably.

As shown in figure 9, connection flow path 92 is formed as flowing with -Z direction is gone to from the front view in terms of +Y direction The triangle of width is gradually expanded in degree of having a lot of social connections.Connection flow path 92 is connected to the downstream of narrow width flow path 91 in +Z direction end End.In the present embodiment, connection flow path 92 upstream end (+Z direction end) flow path width become in narrow width stream The flow path width of the downstream on road 91 is equivalent.

Figure 10 is the sectional view that module 30A is projected with the X-X line of Fig. 8 comparable first.

As shown in Figure 10, connection flow path 92 is from the front view in terms of +X direction, with going to -Z direction and flow path is deep Degree gradually becomes shallower as.That is, the connection flow path 92 of present embodiment is with going to downstream side from upstream side and flow path width broadens, it is another Aspect, with going to downstream side from upstream side and flow path depth shoals.In the present embodiment, in the upstream end of connection flow path 92 Flow path depth become be equal with the flow path depth in the downstream of narrow width flow path 91.

The flow path cross sectional area (in the sectional area of X/Y plane) of downstream (-Z direction end) in connection flow path 92 is preferred Ground becomes smaller than the flow path cross sectional area in upstream end.But connect flow path width, flow path depth, the flow path cross sectional area of flow path 92 It can suitably change.

In addition, in the present embodiment, flow path width and flow path depth continuously (linearly) composition of variation into It has gone explanation, but has been not limited only to this composition.That is, as long as connection 92 flow path width of flow path and flow path depth are with going to downstream side And the composition gradually changed, for example ladder-like or curve-like can also be formed as.In addition, can also be different multiple of gradient The connected composition of straight line.

Figure 11 is the portion the XI enlarged drawing of Figure 10.

As shown in Fig. 9, Figure 11, filtering flow path 84 be connected in z-direction with the downstream connecting in flow path 92, and make from The ink that flow path 92 flows into is connected to circulate towards -Y direction.Specifically, filtering flow path 84 has the filter inlet positioned at +Y direction Flow path 95 and the filter outlet flow path 96 being connected relative to filter inlet flow path 95 along -Y direction.

Filter inlet flow path 95 is connected to connection flow path 92 in +Z direction end (upper end of gravity direction).Filter Width in X-direction and the width for the X-direction in downstream connecting in flow path 92 in inlet fluid path 95 is same.

Filter outlet flow path 96 is in the area (flow path cross sectional area) and filter inlet stream from the front view in terms of Y-direction Road 95 is compared to a small circle.That is, being formed in 96 boundary part of filter inlet flow path 95 and filter outlet flow path towards+Y The stepped surface 97 in direction.Stepped surface 97 is formed as the outer peripheral edge for copying filter inlet flow path 95 and the picture frame shape that extends.

In filter inlet flow path 95, filter inlet flow path 95 is separated into the Y direction configured with flow path 84 will be filtered With the main filter 99 of filter outlet flow path 96.Main filter 99 is to be formed as from the plan view shape in terms of Y-direction and mistake The mesh strip of the same size of filter inlet flow path 95.Outer peripheral portion is engaged in above-mentioned ladder from +Y direction in main filter 99 Poor face 97.Ink passes through main filter 99 during being passed to filter outlet flow path 96 from filter inlet flow path 95. Foreign matter, bubble included in ink are captured by main filter 99 as a result,.

As shown in figure 11, it in the inner surface of filter outlet flow path 96, is formed with filter outlet flow path 96 under What is separated in the Y direction between trip flow path 85 stores wall portion 100.Storing wall portion 100 is the inner surface in filter outlet flow path 96 In, it erects and is arranged along +Z direction from the -Z direction medial surface for being located at -Z direction (lower section of gravity direction), and spread filter The entirety of X-direction in outlet flow passage 96 and formed.

In the +Z direction end stored in wall portion 100, it is formed with the connection flow path for running through along Y-direction and storing wall portion 100 102.Connection flow path 102 spreads the entirety for storing the X-direction in wall portion 100 (filter outlet flow path 96) and is continuously formed. In the present embodiment, positioned at the +Z direction medial surface of +Z direction and filter outlet flow path in the inner surface of disjunctor flow path 102 +Z direction medial surface in 96 positioned at +Z direction flushes.That is, connection flow path 102 is opened in the top portion of filter outlet flow path 96 Mouthful.But the +Z direction medial surface being connected in flow path 102 and filter outlet flow path 96 is not limited to the case where flushing each other.

The flow path cross sectional area (in the area of XZ plane) at the upstream end of flow path 102 is connected to preferably than above-mentioned filtering The minimum flow path cross sectional area (in the sectional area of XZ plane) of device inlet fluid path 95 is smaller.But it is connected to the flowing path section of flow path 102 Product can also with the minimum flow path cross sectional area of filter inlet flow path 95 it is same more than.In addition, in the present embodiment, to by mistake The minimum flow path cross sectional area of filter inlet flow path 95 is set as the upstream end of filter inlet flow path 95 (with the side for connecting flow path 92 Boundary part) situation is illustrated, but is not only limited to this composition.That is, the minimum flowing path section of filter inlet flow path 95 Product can be set as any position of filter inlet flow path 95.

Figure 12 is the exploded perspective view of expansion from first flow path plate 77 to -Y direction in first flow path component 51A.

As shown in Figure 10, Figure 12, downstream flow path 85 is to be open in first flow path plate 77 along -Y direction.Specifically, downstream Flow path 85 has straight line portion 110, the expansion section 111 being connected with the downstream side of straight line portion 110.

Straight line portion 110 is opposite with filter outlet flow path 96 in the Y direction, will store the folder of wall portion 100 between them.Directly Flow path width in line portion 110 in X-direction is comparably formed with filter outlet flow path 96, and flow path in the Y direction is deep Degree is integrally made like throughout Z-direction.Straight line path 110 is connected to filtering by being connected to flow path 102 in +Z direction end Device outlet flow passage 96.In addition, the flow path width of straight line path 110, flow path depth can be changed suitably.

Expansion section 111 extends from the -Z direction end of straight line portion 110 along -Z direction.The flow path of expansion section 111 in the X direction Width is comparably formed with expansion section 110.The flow path depth of expansion section 111 in the Y direction gradually becomes with -Z direction is gone to It is deep.That is, the flow path cross sectional area (sectional area on the direction orthogonal with Z-direction) of expansion section 111 is with going to the downstream side (side-Z To) and be gradually expanded.

Supply line 86 is to run through first flow path plate 77 along Y-direction in the -Z direction end of first flow path plate 77.Supply Flow path width in the X direction in flow path 86 is broader compared with expansion section 111.In the present embodiment, supply line 86 Flow path width comparably set with common ink water chamber 62.

Upstream end (-Y direction end) in supply line 86 is connected to the downstream (-Z direction end) of expansion section 111. On the other hand, the downstream in supply line 86 is open in first flow path plate 77 to +Y direction.

As shown in figure 9, being formed with the first bubble discharge stream for being connected to the first ink flow path 81 in first flow path plate 77 Road 120.First bubble discharge duct 120 is formed relative to filtering flow path 84 in the two sides of X-direction a pair ofly.That is, first bubble Discharge duct 120 relative to by the X-direction in first flow path component 51A center, along Z-direction extend symmetry axis line pair Ground is claimed to be formed.Therefore, in the following description, the first bubble that +X direction is located at relative to the first ink flow path 81 is discharged Flow path 120 is illustrated.In addition, first bubble discharge duct 120 is not limited to a pair.

As shown in Fig. 9, Figure 12, first bubble discharge duct 120 has guide portion 121, the first through portion 122, discharge unit 123 and second through portion 124.

Guide portion 121 is to be open in first flow path plate 77 along +Y direction.Guide road 12 relative to above-mentioned connection flow path 92 are connected with filter inlet flow path 95 along +X direction.Specifically, guide portion 121 is formed as with going to +X direction and the side Z To tapering width cone cell.Specifically, the +Z direction medial surface edge of +Z direction is located among the inner surface of guide portion 121 X-direction and linearly extend.But +Z direction medial surface can also incline with +X direction is gone to towards +Z direction, -Z direction Tiltedly extend.

-Z direction medial surface among the inner surface of guide portion 121 positioned at -Z direction is formed as with going to +X direction and edge The inclined surface that +Z direction extends.In addition, depth in the Y direction in guide portion 121 throughout guide portion 121 generally 's.But the depth of guide portion 121 for example can also gradually shoal with +X direction is gone to.

First through portion 122 is at the top (cross section of +Z direction medial surface and -Z direction medial surface) of guide portion 121 In be connected to guide portion 121.First through portion 122 runs through first flow path plate 77 along Y-direction.In the present embodiment, it first passes through +Z direction is more leaned on compared with filtering flow path 84, is configured in X direction in logical portion 122.Moreover it is preferred that the first through portion 122 meets Any more leaning on +Z direction or being configured at more in +X direction compared with filtering flow path 84 is configured at compared with filtering flow path 84 Person.But the position in Z-direction and X-direction of the first through portion 122.But the first through portion 122 in Z-direction and the side X To position can suitably change.

As shown in figure 12, discharge unit 123 is to be open in first flow path plate 77 along -Y direction.Discharge unit 123 is prolonged along Z-direction It stretches.+Z direction end in discharge unit 123 is connected to the first above-mentioned through portion 122.

Second through portion 124 is connected to the -Z direction end of discharge unit 123.Second through portion 124 runs through first along Y-direction Flow path plate 77.In the boundary part of the second through portion 124 and discharge unit 123, configured with secondary filter 126.

Rear cover 79 has the shape same with first flow path plate 77 from the front view in terms of Y-direction, and is formed as Y The thickness in the direction rectangular plate-like thinner than first flow path plate 77.Rear cover 79 is fixed among first flow path plate 77 towards -Y direction Face.That is, rear cover 79 closes the first ink flow path 81 (downstream flow path 85 and supply line 86) and first bubble row from -Y direction Flow path 120 (through portion 122,124 and discharge unit 123) out.In addition, in the present embodiment, rear cover 79 is outstanding by heat conductivity Metal material (for example, stainless steel etc.) formation.

Heater 130 is configured at the face towards -Y direction in rear cover 79.Heater 130 is by rear cover 79 to the first ink It is heated in water flow road 81, to keep (heat preservation) in set temperature model the ink to circulate in the first ink flow path 81 In enclosing.

As shown in figure 8, front cover 78 is and the onesize rectangular plate-like that is formed of ground of the same shape of rear cover 79.That is, front cover 78 It is thinner than first flow path plate 77 for the thickness of Y-direction.Front cover 78 is fixed on the face among first flow path plate 77 towards +Y direction. That is, front cover 78 closes the first ink flow path 81 (upstream flow path 83 and filtering flow path 84) and first bubble discharge stream from +Y direction Road 120 (guide portion 121 and through portion 122).

The position being overlapped in terms of Y-direction with supply line 86 among front cover 78, being formed with keeps supply line 86 open Communication port 132.Communication port 132 is in the composition from the front view in terms of Y-direction and the same shape of supply line 86, along Y-direction Through front cover 78.

The position being overlapped in terms of Y-direction with the upstream end of upstream flow path 83 (+Z direction end) among front cover 78 is formed Having makes the open inflow entrance 133 of upstream flow path 83.Inflow entrance 133 runs through front cover 78 along Y-direction.

The position being overlapped in terms of Y-direction with the second perforation road 124 among front cover 78, being formed with makes the second through portion 124 Open outlet 134.Outlet 134 runs through front cover 78 along Y-direction.

Although the feelings in the present embodiment, to the first ink flow path 81 for only foring channel-shaped in first flow path component 77 Condition is illustrated, but is not limited only to this composition, and first flow path component 77 can also be among front cover 78 and rear cover 79 extremely Any one is formed with ink flow path less.In this case, can also for example distinguish in first flow path plate 72 and front cover 78, rear cover 79 It forms a groove, and is overlapped these groove portions to form ink flow path.

It flows into port 76 and is formed as the tubular extended along Z-direction.It flows into port 76 and is fixed on the +Z direction end in front cover 78 Portion.Port 76 is flowed into be connected in the first ink flow path 81 by above-mentioned inflow entrance 133.

(the first insulating trip)

As shown in figure 8, the face towards +Y direction in front cover 78, is equipped with the first insulating trip 135.First insulating trip 135 is from Y Be formed as the U-shaped being open along -Z direction in the front view that direction is seen.First insulating trip 135 surrounds communication port in front cover 78 Around 132.Specifically, the first insulating trip 135 has a pair of outside for relative to communication port 132 and being located at the two sides of X-direction Pedestal portion 136 and the bridge portion 137 that the +Z direction end of outside pedestal portion 136 is connected to each other.In addition, in the present embodiment, Polyimides is for example preferably used in first insulating trip 135.But if the material of the first insulating trip 135 is by with insulating properties, resistance to Ink (resistance to stripping property), and more soft material (such as resin material, rubber material) formation, then can suitably become More.

On the outside in pedestal portion 136, in the position being overlapped in terms of Y-direction with above-mentioned outlet 134, being formed with makes to be discharged The exposing mouths 140 that mouth 134 exposes.Expose mouth 140 and runs through outside pedestal portion 136 along Y-direction.

On the outside in pedestal portion 136, it is being located at the part for more leaning on +Z direction compared with exposing mouth 140, is being formed with along Y-direction Through the location hole 142 of outside pedestal portion 136.Location hole 142 is accommodated from first flow path component 51A along +Y direction engaging outstanding Pin 143.In addition, location hole 142 can also be formed in bridge portion 137.

Bridge portion 137 is located at +Z direction relative to communication port 132.That is, in front cover 78, the position relative to communication port 132 In the part of -Z direction be the first insulating trip 135 be located at this at white space 141.In addition, the first insulating trip 135 at least exists Non- discharge region Q2 only has outside pedestal portion 136.

As shown in Figure 10, first above-mentioned chip 52A is by the surface of the first cover board 56 towards solid in the state of Y-direction Due to front cover 78 and the first insulating trip 135.Specifically, among the surface of the first cover board 56, the opposite portion with the first insulating trip 135 Lease making is fixed on the first insulating trip 135 by bonding agent S1.On the other hand, among the surface of the first cover board 56, with white space 141 Opposite part is directly fixed on front cover 78 via bonding agent S1.

It is fixed in the state of first flow path component 51A in first chip 52A, drives (the discharge area shown in fig. 6 of wall 61 Domain Q1) it is opposite in the Y direction with white space 141.That is, in the present embodiment, only bonding agent S1 is between (the first insulating trip 135 not between) driving wall 61 and front cover 78 between.In this case, bonding agent S1 surrounds common ink water chamber 62 and communication port 132 Around, it will be sealed between first chip 52A and first flow path component 51A.In addition, the bonding used in the present embodiment Agent S1, which is used, has insulating properties and more soft material (for example, silicon systems) etc. (more soft than the first insulating trip 135).

It is fixed in the state of first flow path component 51A in first chip 52A, the common ink water chamber 62 of the first cover board 56 Supply line 86 is connected to by communication port 132.On the other hand, as shown in figure 8, the first bubble row of first chip 52A Hole 65A (referring to Fig. 7) is gone to be connected to (the second perforation of first bubble discharge duct 120 by exposing mouth 140 and outlet 134 Portion 124).

(second flow path component)

As shown in figure 5, second flow path component 51B has the second manifold 150 and the second force application part 151.

Second manifold 150 be formed as it is whole using Y-direction as thickness direction, Z-direction length than the first manifold 75 Short plate.As shown in figure 3, the second manifold 150 is inserted into the first above-mentioned module receiving portion 44A by -Z direction end It is kept in the state of being erected to +Z direction by substrate parts 38.

As shown in figure 5, the second manifold 150 has second flow path plate 152 and liquid cover 153.

Second flow path plate 152 is formed in the same manner as first flow path plate 77 by metal material (for example, aluminium etc.) etc..In second Road plate 152 is formed with the second ink flow path 155 that ink circulates towards second chip 52B.

Figure 13 is the front view of the second flow path plate 152 in terms of +Y direction.

As shown in figure 13, the second ink flow path 155 runs through second flow path plate 152 along Y-direction, and in X direction zonally Extend.In second ink flow path 155, formed to the shape same with common ink water chamber 62 from the front view shape in terms of Y-direction. Therefore, the intercommunicating pore 73 of spitting unit 50 is in the both ends of the X-direction in the second ink flow path 155, in the second ink flow path 155 It is opposite in the Y direction.In addition, in the present embodiment, it is preferred that the public affairs of the second ink flow path 155 and second chip 52B Total volume of the common ink water chamber 62 of total volume of ink chamber 62 and above-mentioned supply line 86 and first chip 52A altogether Comparably set.

Symbol 157 in Figure 13 is the clean flow path for being connected to the second ink flow path 155.In clean flow path 157, tieing up When shield etc., inflow is drunk up from aftermentioned nozzle bore 240, by the detergent remover of spitting unit 50 and the second ink flow path 155 etc..Stream The detergent remover for entering clean flow path 157 is attracted by cleaning port 158.

In second flow path plate 152, it is formed with the second bubble discharge duct 160 for being connected to the second ink flow path 155.The Two bubble discharge duct 160 have discharge unit 161 and through portion 162.

Discharge unit 161 is open in second flow path plate 152 along +Y direction.Discharge unit 161 is opposite in second flow path plate 152 Extend in X direction in the part that the second ink flow path 155 is located at +Z direction.The upstream end of discharge unit 161 is in the second ink flow path In 155 inner surface among the +Z direction medial surface of +Z direction (top of gravity direction), opened in the central portion of X-direction Mouthful.That is, the upstream end of above-mentioned a pair of of intercommunicating pore 73 and discharge unit 161 is comparably set respectively in the distance of X-direction.In addition, The upstream end of a pair of of intercommunicating pore 73 and discharge unit 161 can suitably be changed in the distance of X-direction.In addition, the number of intercommunicating pore 73 Amount, position can suitably change.

The downstream of discharge unit 161 is connected to perforation being located at the part of +X direction relative to the second ink flow path 155 Portion 162.In addition, in the present embodiment, to the second bubble discharge duct 160 relative to the second ink flow path 155 along +Z direction The composition of configuration is illustrated, but is not limited only to this composition.

Through portion 162 runs through second flow path plate 152 along Y-direction.In in through portion 162, configured with secondary filter 165.

In second flow path plate 152, sensor accommodating portion 167 be formed in the second bubble discharge duct 160 be located at the side+Z To part.Sensor accommodating portion 167 is open in second flow path plate 152 along +Y direction, and extends in X direction.

As shown in figure 5, liquid cover 153 has and same outer of second flow path plate 152 from the front view in terms of Y-direction Shape, and the rectangular plate-like that the thickness that is formed as Y-direction is thinner than second flow path plate 152.Liquid cover 153 closes second from +Y direction Ink flow path 155, the second bubble discharge duct 160 and sensor accommodating portion 167.In addition, liquid cover 153 is by heat conductivity Outstanding metal material (for example, stainless steel etc.) formation.

Second force application part 151 1 is set to the both ends of the X-direction in second flow path plate 152 over the ground.Each second force Component 151 configures relative to second flow path plate 152 along +Y direction leaf spring like for free end.As shown in figure 3, in second flow path portion Part 51B is inserted into the state of the first module receiving portion 44A, the second functional component 151 phase in the Y direction in substrate body portion 41 To long leg 45c, 45d among between the first long leg 45c and the second manifold 150.That is, the second functional component 151 will project Module 30A is acted on towards -Y direction.It exerts a force that is, the second force application part 151 will project module 30A towards -Y direction.

(the second insulating trip)

As shown in figure 5, the face towards -Y direction in second flow path plate 152, is equipped with the second insulating trip 170.Second insulating trip 170 have outside pedestal portion 171 and bridge portion 172 in the same manner as the first above-mentioned insulating trip 135.

Among each outside pedestal portion 171, in the outside pedestal portion 171 for being located at +X direction, in terms of Y-direction and penetrating through The position that portion 162 is overlapped is formed with the exposing mouth 175 for exposing through portion 162.Expose mouth 175 and runs through outer side dado along Y-direction Portion 171.

Bridge portion 172 is located at +Z direction relative to the second ink flow path 155.That is, in second flow path plate 152, relative to Second ink flow path 155 and be located at -Z direction part be the second insulating trip 135 be located at this at 178 (reference of white space Figure 10).

In bridge portion 172, at the both ends of X-direction, it is formed with the location hole 173 for running through bridge portion 172 along Y-direction.Positioning Hole 173 is accommodated from second flow path component 51B along -Y direction engagement pin outstanding (not shown).In addition, location hole 173 can be with shape Pedestal portion 171 on the outside of Cheng Yu.

As shown in Figure 10, second above-mentioned chip 52A is by the surface of the second cover board 72 towards in the state of +Y direction It is fixed on second flow path plate 152 and the second insulating trip 170.Specifically, among the surface of the second cover board 72, with the second insulating trip The second insulating trip 170 is fixed on via bonding agent S2 in 170 opposite parts.On the other hand, among the surface of the second cover board 72, with The opposite part of white space 178 is directly fixed on second flow path plate 152 via bonding agent S2.It is fixed in second chip 52B In the state of second flow path component 51B, driving wall 61 (discharge region Q1 shown in fig. 6) and white space 178 are in the Y direction In opposite directions.In this case, bonding agent S2 is surrounded around common ink water chamber 62 and the second ink flow path 155, by second chip It is sealed between 52B and second flow path component 51B.In addition, using same material in S2 in bonding agent S1.

In the present embodiment, the composition for being respectively interposed in insulating trip 135,170 between each head chip 52A, 52B is carried out Explanation, it is also possible to being at least the first insulating trip 135 between first chip 52A and first flow path component 51A.

It is fixed in the state of second flow path component 51B in second chip 52B, the common ink water chamber 62 of the second cover board 72 It is connected to the second ink flow path 155.The second bubble venting hole 65B of second chip 52B is connected to the by exposing mouth 175 Two bubble discharge duct 160 (through portion 162).

In this way, first flow path component 51A and second flow path component 51B are in the side Y in the injection module 30A of present embodiment It is opposite upwards, and the spitting unit 50 with two head chip 52A, 52B is clamped in each channel member 51A, between 51B.

(FPC unit)

As shown in figure 5, FPC unit 180 is supported in the front cover 78 of the first manifold 75.FPC unit 180 has drive substrate 181 and circuit board 182.Drive substrate 181 and circuit board 182 are flexible printed board respectively, are formed in basilar memebrane Wiring pattern and constitute.

Drive substrate 181 has department of assembly 185, chip interconnecting piece 186, sensor attachment portion 187 and lead division 188.This Outside, drive substrate 181 can also use rigid substrates etc. in department of assembly 185.

Department of assembly 185 is supported on front cover 78.Such as multiple driver 190A, 190B are assemblied in department of assembly 185.Driver 190A, 190B are the first driver 190A for driving first chip 52A and the second driver for driving second chip 52B 190B.Each driver 190A, 190B are linearly arranged in X direction.Although in addition, in the present embodiment, being driven to first The composition that device 190A and the second driver 190B is assemblied in a drive substrate 181 together is illustrated, but is not limited only to this It constitutes, is also can correspond to each driver and drive substrate is set.

As shown in Figure 10, chip interconnecting piece 186 is extended from department of assembly 185 along -Z direction.- the Z of chip interconnecting piece 186 Direction end is fixed on the +Z direction end of the first actuator plate 55 by crimping etc..As a result, by the first driver 190A and The driving electrodes 59 of first chip 52A are electrically connected via chip interconnecting piece 186.

As shown in Fig. 5, Figure 13, sensor attachment portion 187 is extended from department of assembly 185 along +X direction.Connect in sensor The front end of socket part 187 is equipped with temperature sensor 191 (for example, thermal resistor etc.).Sensor attachment portion 187 is received In above-mentioned sensor accommodating portion 167.That is, temperature sensor 191 detects the ink of spitting unit 50 via second flow path plate 152 Temperature.

Lead division 188 is extended from department of assembly 185 along +Z direction.Lead division 188 is connected to interface 192 (referring to Fig. 3). Interface 192 or is controlled for will for example supply electric power from the electric power of ink gun 5A externally supplied toward FPC unit 180 The transmitting and receiving of signal.

As shown in Fig. 5, Figure 10, circuit board 182 will connect between department of assembly 185 and second chip 52B.Specifically, In circuit board 182, +Z direction end is connected to department of assembly 185, and -Z direction end is fixed on second by crimping etc. and is actuated The +Z direction end of device plate 71.As a result, by the driving electrodes 59 of the second driver 190B and second chip 52B via wiring Substrate 182 is electrically connected.

As shown in figs. 3 and 5, among first flow path component 51A, in driver 190A, 190B above-mentioned in terms of Y-direction The position court of coincidence is configured with heat sink 195.Heat sink 195 is formed in a manner of crossing over drive substrate 181 in X direction.Heat dissipation Plate 195 covers driver 190A, 190B between being clipped in heat transfer sheet 196.The both ends of the X-direction of heat sink 195 than First flow path component 51A is fixed in 181 more lateral of drive substrate.In addition, heat sink 195 and heat transfer sheet 196 are excellent by heat conductivity Elegant material is formed.In the present embodiment, heat sink 195 is formed by such as aluminium etc., and heat transfer sheet 196 is by shapes such as such as silicone resin At.

As shown in Figure 3, Figure 4, above-mentioned first module 30A is projected in first flow path component 51A towards -Y direction, second Circuit unit 52B is inserted into the first module receiving portion 44A towards in the state of +Y direction.At this point, first projects module 30A the One force application part 48 between second flow path component 51B and the first short leg 45a, the second force application part 151 is between second Substrate parts 38 are held in the state of between circuit unit 51B and the first long leg 45c.Therefore, the first injection module 30A exists It exerted a force by the first force application part 48 along -X direction (towards the direction of the second short leg 45b), pass through the second force application part 151 Substrate parts 38 are held in the state of -Y direction (towards the direction of separating part 46) force.At this time, it is preferred that spue The -Z direction end face in portion 50 is configured with the -Z direction end face of substrate parts 38 (substrate body portion 41), or compares basal part (-Z direction end face is more configured along -Z direction part 38.

Second projects module 30B in first flow path component 51A towards +Y direction, second flow path component 52B towards -Y direction In the state of, it is inserted into the second module receiving portion 44B.That is, the first flow path component 51A of the second injection module 30B is penetrated with first The first flow path component 51A of module 30A is opposite in the Y direction out.In addition, respectively projecting module 30A, 30B is solid by bonding agent Due to corresponding module receiving portion 44A, 44B.

(strut)

As shown in Fig. 2, in substrate parts 38, the strut 200 equipped with the boarded parts for supporting to substrate parts 38.Pillar Unit 200 is erected from substrate parts 38 along +Z direction, and is surrounded around each injection module 30A, 30B together.

Module holding mechanism 210 is among strut 200 positioned at X-direction pillar (the first pillar of the two sides of X-direction 201 and second pillar 202) with project module 30A, between 30B.Further, since each module holding mechanism 210 any one all by same The composition of sample forms, thus in the following description, with the module between the first pillar 201 and the first injection module 30A It is illustrated for holding mechanism 210.

First pillar 201 is located at +X direction relative to module portion 30A, 30B is projected.First pillar 201 is at -Z direction end Portion is inserted into the state that manifold 52 is inserted into module receiving portion 44A, 44B and erects from substrate parts 38 along +Z direction.In addition, first Pillar 201 is assembled into substrate parts 38 after projecting the assembling of module portion 30A, 30B to substrate parts 38.

Figure 14 is the sectional view along the XIV-XIV line of Fig. 2.

As shown in Fig. 3, Figure 14, module holding mechanism 210 has the positioning pin 212 set on first flow path component 51A, is formed In the first pillar 201 the first receiving portion 214 and will between positioning pin 212 and the first pillar 201 link supporting slice 216.

Positioning pin 212 is prominent along +X direction from first flow path component 77.Moreover it is preferred that the configuration of positioning pin 212 is in phase For substrate parts 38 along the position that Z-direction separates.In the present embodiment, the configuration of positioning pin 212 is in first flow path plate 77 Compared with the central portion of Z-direction be located at more lean on +Z direction part.

First receiving portion 214, from the lateral plan in terms of X-direction, runs through and positioning pin in X direction among the first pillar 201 212 be overlapped parts and formed.First receiving portion 214 is circularly being formed from the lateral plan in terms of X-direction, and internal diameter one Formed to sample.The internal diameter of first receiving portion 214 is bigger than the outer diameter of positioning pin 212.Above-mentioned positioning pin 212 runs through the first receiving portion 214 and it is prominent along +X direction relative to the first pillar 201.

Supporting slice 216 is using Z-direction as the plate of longer direction.Supporting slice 216 from +X direction closing first to accommodate The mode in portion 214 is fixed on the first pillar 201.Specifically, it is from the lateral plan in terms of X-direction among supporting slice 216 The position that one receiving portion 214 is overlapped is formed with the second receiving portion 220 for running through supporting slice 216 in X direction.Second receiving portion 220 It is circularly being formed from the lateral plan in terms of X-direction, and internal diameter is made like.The internal diameter of second receiving portion 220 is than The internal diameter of one receiving portion 214 is small, bigger than the outer diameter of positioning pin 212.Above-mentioned positioning pin 212 is inserted into the second receiving portion 220.And And the inner peripheral surface of the second receiving portion of periphery face contact 220 of positioning pin 212, so that limitation first projects module 30A for first The movement in the direction for being orthogonal to X-direction of pillar 201.

In addition, positioning pin 212 can also be embedded in the second receiving portion 220.First receiving portion 214 and the second receiving portion 220 In, shape is not limited to circle in lateral plan, can also be rectangular-shaped, triangle.In addition, the first receiving portion 214 and second is held Receive the shape that portion 220 can also be mutually different.Even if in such a case, the open area ratio of the second receiving portion 220 The opening area of one receiving portion 214 is set smallly.

It, can also be not through supporting slice 216 if the second receiving portion 220 is inserted into positioning pin.

First receiving portion 214, the second receiving portion 220 can also be the composition that internal diameter changes gradually.

Supporting slice 216 is relative to the second receiving portion 220 and in the two sides of Z-direction, by screw to be fixed on the first pillar 201.Specifically, relief hole 223 is formed with relative to the second receiving portion 220 and in the two sides of Z-direction among supporting slice 216.It allows The internal diameter in position hole 223 is bigger than the outer diameter of screw 222.Screw 222 is concluded by relief hole 223 in the first pillar 201.Supporting slice 216 are clamped in the X direction between the head of screw 222 and the first pillar 201, so that supporting slice 216 is fixed on first Column 201.In addition, the front end of screw 222 approaches in the X direction relative to first flow path plate 77.

In this way, the first injection module 30A of present embodiment is inserted into the first module receiving portion 44A by -Z direction end And kept by substrate parts 38, +Z direction end is kept by module holding mechanism 210.

(damper)

As shown in Fig. 2, damper 31 is set to +Z direction relative to module 30A, 30B is projected, it is corresponding with each injection module 30A, 30B In (accordingly with the color of ink) setting.In addition, each damper 31 is arranged side by side along Y-direction.In addition, each damper 31 It is all same composition other than the color for the ink being supplied to.Therefore, in the following description, to a damper 31 (damper 31 of the first injection module 30A) is illustrated, and omits the explanation of another damper 31.

Damper 31 is fixed on above-mentioned strut 200 in relative to the first injection module portion direction 30A+Z.Damping Device 31 has ingress port 230, pressure buffer portion 231 and outlet port 232.In addition, damper 31 can also and ink gun 5A is provided separately.

Ingress port 230 is formed as the tubular being provided projectingly from pressure buffer portion 231 towards +Z direction.Above-mentioned ink piping 16 are connected to ingress port 230 (referring to Fig.1).Ink in ink storage tank 15 is by flowing into ingress port in ink piping 16 230。

Pressure buffer portion 231 is logical to be formed as box.Structure ands storing movable film etc. inside it of pressure buffer portion 231 At.The configuration of pressure buffer portion 231 is projected between module 30A in ink storage tank 15 (Fig. 1) and first, passes through ingress port to absorb The pressure oscillation of the ink of 230 pairs of dampers 31 supply.

The position of ingress port 230 of the outlet port 232 from pressure buffer portion 231 diagonally is set along -Z direction protrusion It sets.The ink being discharged out of pressure buffer portion 231 flows into outlet port 232.The first inflow port 76 for projecting module 30A connects It is connected to outlet port 232.

In part between being located at opposite damper 31 in the Y direction, configured with above-mentioned interface 192.It connects Mouth 192 is supported on strut 200.

(nozzle plate)

Above-mentioned nozzle plate 32 is formed by resin materials such as polyimides.Nozzle plate 32 is fixed on substrate body portion via bonding agent 41 -Z direction end face and the -Z direction end face of spitting unit 50 (from the part that module receiving portion 44A, 44B expose).Nozzle plate 32 It is covered together from -Z direction by the spitting unit 50 of each injection module 30A, 30B.

As shown in Figure 6, Figure 7, in nozzle plate 32, it is formed with the nozzle bore 240 for running through nozzle plate 32 along Z-direction.Nozzle bore 240 are respectively formed at and the discharge channel 57 of each head chip 52A, 52B opposite position in z-direction.

In nozzle plate 32, with the opposite position in z-direction above-mentioned bubble venting hole 65A, 65B, be formed with along Z The tap 241A, 241B of nozzle plate 32 are run through in direction.That is, in the present embodiment, nozzle bore 241 and tap 241A, 241B is open respectively in the spit face (towards the face of -Z direction) of nozzle plate 32.The tap 241A, 241B of present embodiment It is the second discharge for being connected to the first tap 241A of first bubble venting hole 65A and being connected to the second bubble venting hole 65B Hole 241B.The internal diameter (opening area) of second tap 241B is smaller than the internal diameter of the first tap 241A.But each tap The internal diameter of 241A, 241B can be changed suitably.In addition, each tap 241A, the case where 241B is not limited to circular hole.

In addition, ink in nozzle bore 240 and tap 241A, 241B is by nozzle bore 240 and tap 241A, Surface tension etc. for being acted at the respective inner surface of 241B and the meniscus for being formed with appropriate (concave shape).That is, in this embodiment party In the printer 1 of formula, by the head difference of the liquid level of the liquid level and meniscus of ink storage tank 15, by the pressure in discharge channel 57 It is maintained at desired negative pressure.Above-mentioned meniscus is maintained as a result, and ink is unlikely to unintentionally leak out.

In addition, nozzle plate 32 is not limited to resin material, it can also be formed, can also be used with metal material (stainless steel etc.) The lit-par-lit structure of resin material and metal material.Although in the present embodiment, to a piece of nozzle plate 32 by each injection module The composition that 30A, 30B are covered together is illustrated, but is not limited only to this composition, and can also be will be each with multi-disc nozzle plate 32 Project module 30A, the composition that 30B is individually covered.

(nozzle guard part)

As shown in Fig. 2, nozzle guard part 33 is formed such as and implementing punch process to plate stainless steel.Nozzle guard part 33 cover substrate body portion 41 from -Z direction in the state that nozzle plate 32 is sandwiched therebetween.

Among nozzle guard part 33 with the spitting unit 50 of each injection module 30A, 30B opposite position in z-direction, shape Nozzle rows 32 are made to be exposed to external exposed hole 245 at having.Exposed hole 245 is formed as along Z-direction through nozzle guard part 33, and And the slit-shaped extended in X direction.Exposed hole 245 and each injection module 30A, 30B are accordingly formed with along Y-direction interval Two column.Above-mentioned nozzle bore 240 and tap 241A, 241B is connected to the outside of ink gun 5A by exposed hole 245.This Outside, it can also be in nozzle guard part 33, be equipped in the filling of ink, when the stopping of printing work etc., from -Z direction It is close to nozzle guard part 33 and by above-mentioned nozzle bore 240 and tap 241A, the cap that 241B is sealed.

[working method of printer]

Then, illustrate the method using above-mentioned printer 1 to recorded medium P record information.

As shown in Figure 1, the grid roller 11,13 of conveyer 2,3 rotates, thus in these grid if operating printer 1 Recorded medium P is transported to +X direction between lattice roller 11,13 and pinch roller 12,14.In addition, at the same time, drive motor 28 Rotate pulley 26 so that endless belt 27 is advanced.23 one side of balladeur train is guided by guide rail 21,22 as a result, and an edge Y-direction is reciprocal It is mobile.

During this period, in each ink gun 5A, 5B, the driving electrodes 59 (referring to Fig. 7) of correct chip 52A, 52B, which apply, is driven Dynamic voltage.Make that wall 61 is driven to generate thickness sliding deformation as a result, so that generating in the ink being filled in discharge channel 57 Pressure wave.By the pressure wave, the internal pressure in discharge channel 57 is got higher, to pass through 240 discharge ink of nozzle bore.Then, pass through ink Water hits on recorded medium P and various information is recorded on recorded medium P.

Here, being illustrated to flowing of the ink in the first injection module 30A of ink gun 5A.

In the present embodiment, as shown in figure 3, passing through damping from the ink that ink storage tank 15 is supplied to ink gun 5A After device 31, flowed into the first manifold 75 for projecting module 30A by flowing into port 76.

As shown in the solid arrow of Figure 10, the ink in the first manifold 75 is flowed into after having passed through upstream flow path 83, from+ Z-direction flows into the filter inlet flow path 95 of filtering flow path 84.As shown in the solid arrow of Figure 11, filter inlet stream is flowed into Ink in road 95 passes through main filter 99 during going to filter outlet flow path 96 from filter inlet flow path 95.By This, foreign matter, the bubble for being included in ink are captured at main filter 99.Reach the ink in filter outlet flow path 96 Flowing to -Y direction (downstream flow path 85) is stopped by storing wall portion 100.Filter outlet flow path 96 is full of with ink as a result,.

If riddling the ink in filter outlet flow path 96 reaches connection flow path 102, flowed by connection flow path 102 Enter in downstream flow path 85.Ink flows in supply line 86 towards +Y direction after along -Z direction connection downstream flow path 85. The ink flowed in supply line 86 is flowed by communication port 132 in the common ink water chamber 62 of first chip 52A.It is flowing Enter among the ink in the common ink water chamber 62 of first chip 52A, a part of ink is passing through in first chip 52A Slit 63 and flowed into after discharge channel 57, pass through nozzle bore 240 spue.

On the other hand, among the ink in the common ink water chamber 62 for flowing into first chip 52A, a part of ink exists It is flowed into intercommunicating pore 73 in the both ends of X-direction in common ink water chamber 62.Later, ink flows into second by intercommunicating pore 73 In the common ink water chamber 62 of head chip 52B.The ink flowed into the common ink water chamber 62 of second chip 52B is full of second on one side In ink flow path 155, on one side towards the circulating inside of X-direction.Later, the ink flowed into second chip 52B is passing through slit 63 and flowed into after discharge channel 57, pass through nozzle bore 240 spue.

But as shown in the dotted arrow of Fig. 9, in the first ink flow path 81, it is stranded in filter inlet flow path 95 The bubble of (relative to main filter 99 in upstream side) is discharged to the first injection module by first bubble discharge duct 120 The outside of 30A.Specifically, the bubble captured at main filter 99, the bubble that is stranded in filter inlet flow path 95 are in ink Water is expressed into the two sides of X-direction during being passed to the two sides of X-direction in filter inlet flow path 95.Later, bubble exists After entering guide portion 121, outside in guide portion 121 in X direction and moved along +Z direction.Moreover, bubble passes through First through portion 122 and moved along -Y direction.Later, bubble passes through pair after moving by discharge unit 123 along -Z direction Filter 126 (referring to Fig.1 2) and enter the second through portion 124.Bubble into the second through portion 124 is entering as shown in Figure 6 After the first bubble venting hole 65A of first chip 52A, it is discharged to by the first tap 241A of nozzle plate 32 outer Portion.

On the other hand, bubble residence in the common ink water chamber 62 of second chip 52B, second flow path component 51B ( Two ink flow paths 155) in the case where, bubble is discharged to the outer of the first injection module 30A by the second bubble discharge duct 160 Portion.Specifically, the bubble for being stranded in the second ink flow path 155 etc. reaches through portion 162 by discharge unit 161.Reach perforation The bubble in portion 162 is after having passed through secondary filter 165, into the second bubble venting of second chip 52B as shown in FIG. 6 Hole 65B.Later, bubble is discharged to the outside by the second tap 241B of nozzle plate 32.

In this way, in the present embodiment, using in first flow path component 51A, being formed with makes the first ink flow path 81 The first bubble discharge duct 120 of inside and outside connection, in second flow path component 51A, being formed with makes the inside and outside of the second ink flow path The composition of second bubble discharge duct 160 of connection.

According to this constitution, the bubble being detained in the first ink flow path 81 and the second ink flow path 155 can be passed through first Bubble discharge duct 120 and the second bubble discharge duct 160 and be discharged respectively.Therefore, bubble is able to suppress into each head chip In 52A, 52B, and improve ink in the fillibility of each head chip 52A, 52B.Thereby, it is possible to improve discharge stability.

In the present embodiment, using nozzle bore 240 and tap 241A, 241B on the same face in nozzle plate 32 The composition of (spit face) upper opening.

According to this constitution, for example in the filling of ink, when the stopping of printing work, nozzle bore 240 and tap 241A, In the case where 241B is sealed by cap etc., it can be realized mono- overlay of nozzle bore 240 and tap 241A, 241B through a cap Lid.Therefore, it is possible to realize the raisings of maintainability.

But as described above, in the second ink flow path 155, a part of the ink in the first ink flow path 81 is logical It crosses intercommunicating pore 73 and is supplied to.In the situation, the second ink flow path 155 is due to being located at downstream relative to the first ink flow path 81 Side, thus high pressure is easily become compared with the pressure in the first ink flow path 81.

Then, according to the present embodiment, by making the internal diameter of the second tap 241B than the internal diameter of the first tap 241A It is small, so as to make in the surface tension of the inner surface effect of the second tap 241B than the inner surface in the first tap 241A The surface tension of effect is high.Meniscus stability is become easy in the second tap 241B as a result, ink is able to suppress and passes through Second tap 241B and unexpectedly leak out.

In addition, so as to inhibit in ink gun 5A, 5B's makes by making meniscus stability in the second tap 241B Used time while spuing (ink etc.), such as meniscus are destroyed, extraneous gas due to the negative pressure that generates in second chip 52B (air) is entered in second chip 52B by the second tap 241B.Therefore, be able to suppress from the second tap 241B into The air entered becomes bubble and is stranded in second chip 52B, and improves discharge stability.

In the present embodiment, distinguished using the distance of the upstream end of a pair of of intercommunicating pore 73 and discharge unit 161 in the X direction The composition comparably set.

According to this constitution, can be flowed in the second ink flow path 155 in central portion of the ink from each intercommunicating pore 73 to X-direction In logical process, the bubble in the second ink flow path 155 will be stranded in from the two sides of X-direction towards the second bubble discharge duct 160 Equably squeeze out.Thereby, it is possible to more reliably inhibit bubble to enter in second chip 52B.

In the present embodiment, it is respectively configured using in first bubble discharge duct 120 and the second bubble discharge duct 160 The composition of secondary filter 126,165.

According to this constitution, by making the flow path resistance in bubble discharge duct 120,165 due to secondary filter 126,165 and Increase, so as to inhibit due to the flowing due to the ink from upstream, the discharge of ink from nozzle bore 240 etc. Pressure oscillation in second bubble discharge duct 160, and the meniscus in the second tap 241B is destroyed.It is being discharged as a result, Meniscus stability is become easy in hole 241A, 241B, is able to suppress ink by tap 241A, 241B and unexpected floor drain Out.In addition, although in the present embodiment, to each tap 241A is made, the internal diameter of 241B is different and adjusts the structure of surface tension At being illustrated, but it is not limited only to this composition, the flow path resistance of each secondary filter 126,165 can also be made different and adjust table Face tension.

In the present embodiment, due to having above-mentioned ink gun 5A, 5B, therefore it is capable of providing the printing of discharge excellent performance Machine 1.

In addition, technical scope of the invention is not limited to the above embodiment, it can be in the model for not departing from present subject matter It is subject to various changes in enclosing.

For example, in the above-described embodiment, as an example of a liquid ejecting apparatus, lifting progress for ink-jet printer 1 Illustrate, but is not limited to printer.For example, it is also possible to be facsimile machine, on-demand printing machine etc..

Although in the above-described embodiment, to two injection module 30A, 30B be equipped on the composition on substrate parts 38 into It has gone explanation, but has been not limited only to this composition.The quantity for being equipped on the injection module of substrate parts 38 can be one and be also possible to Three or more multiple.

Although the head chip that in the above-described embodiment, opposite side is penetrated is illustrated, but not limited to this.For example, it is also possible to The present invention is suitable for penetrate type (side shoot from the so-called side of the extending direction central portion discharge ink in discharge channel Type head chip).

Furthermore it is also possible to which the direction of the pressure by the present invention suitable for making to be applied to ink and the discharge direction of ink are same The head chip of type (roof shoot type) is penetrated on the so-called top in one direction.

Although the composition in the above-described embodiment, being formed in each head chip 52A, 52B itself to intercommunicating pore 73 carries out Illustrate, but is not limited only to this composition.Can also additionally be arranged with each head chip 52A, 52B makes each head chip 52A, 52B connection Connection flow path.

Although in the above-described embodiment, to the composition being connected between each ink flow path 81,155 by intercommunicating pore 73 It is illustrated, but is not limited only to this composition, can also will flow into port and respectively be set to each channel member 51A, 51B, it is independent In each channel member 51A, 51B and the composition for supplying ink.

Although in the above-described embodiment, Z-direction is illustrated along the consistent composition of gravity direction, it is not limited only to This composition can also make Z-direction consistent in the horizontal direction.

Although in the above-described embodiment, being said to tap 241A, the 241B composition for being formed in nozzle plate 32 It is bright, but it is not limited only to this composition.It flows into, tap can also be formed in each channel member 51A, 51B, head chip 52A, 52B Deng.

Although in the above-described embodiment, two head chip 52A, 52B are equipped on the composition of an injection module into It has gone explanation, but has been not limited only to this composition.That is, can also be that a head chip carrying projects the composition of module in one.

In addition, without departing from the scope of the subject in the invention, it can be suitably by the constituent element in above embodiment Well known constituent element is replaced with, furthermore it is also possible to which above-mentioned each variation is appropriately combined.

Symbol description

1 ink-jet printer (liquid injection apparatus)

5A, 5B ink gun (liquid ejecting head)

15 ink storage tanks (supply source)

32 nozzle plates (injection orifice plate)

51A first flow path component

51B second flow path component

First chip of 52A

Second chip of 52B

57 discharge channels (first pressure changes room, second pressure changes room)

62 common ink water chambers (liquid chamber)

71 second actuator plates

72 second cover boards

73 intercommunicating pores (connection flow path)

76 flow into port

81 first ink flow paths (the first liquid flow path)

120 first bubble discharge duct

126,165 secondary filters

155 second ink flow paths (second liquid flow path)

160 second bubble discharge duct

The first tap of 241A

The second tap of 241B

Q1 discharge region (jeting area).

Claims (7)

1. a kind of liquid ejecting head comprising:

First chip and second chip of liquid are laminated and sprayed along first direction；

First flow path component is configured at and second core in the first direction relative to first chip The opposite side of piece, and there is the first liquid flow path for being connected to first chip；And

Second flow path component is configured at and first core in the first direction relative to second chip The opposite side of piece, and there is the second liquid flow path for being connected to second chip,

In the first flow path component, it is formed with the first bubble discharge stream for making the inside and outside connection of first liquid flow path Road,

In the second flow path component, it is formed with the second bubble discharge stream of the inside and outside connection for making the second liquid flow path Road.

2. liquid ejecting head according to claim 1, which is characterized in that first chip, which has to give liquid, presses The first pressure of variation changes room,

There is second chip the second pressure for giving pressure oscillation to liquid to change room,

In first chip and second chip, the first pressure variation is respectively connected to equipped with being formed with Room and the second pressure change the injection orifice plate of the spray-hole of room,

Among the injection orifice plate, in the jet face of spray-hole opening, it is connected to the first bubble discharge duct First tap and the second tap opening for being connected to the second bubble discharge duct.

3. liquid ejecting head according to claim 2, which is characterized in that the first flow path component has the confession of liquid To the inflow port that source is connected with first liquid flow path,

Between the first flow path component and the second flow path component, configured with making first liquid flow path and described The connection flow path of two liquid flow paths connection,

The internal diameter of second tap is smaller than the internal diameter of first tap.

4. liquid ejecting head according to claim 3, which is characterized in that second chip, which has to give liquid, presses The second pressure of variation changes the jeting area that room is arranged along the second direction intersected with the first direction,

The connection flow path one is configured at the part for being located at two sides relative to the jeting area in the second direction over the ground,

Central portion between a pair of the second bubble discharge duct in second direction connection flow path is connected to institute State second liquid flow path.

5. liquid ejecting head according to claim 3, which is characterized in that in the second bubble discharge duct, be configured with Filter the filter of liquid.

6. liquid ejecting head according to claim 4, which is characterized in that in the second bubble discharge duct, be configured with Filter the filter of liquid.

7. a kind of liquid injection apparatus, which is characterized in that have liquid ejecting head described in any one of claim 1 to 6.