CN101314277B - Liquid ejecting head and liquid ejecting apparatus - Google Patents
Liquid ejecting head and liquid ejecting apparatus Download PDFInfo
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- CN101314277B CN101314277B CN2008100999706A CN200810099970A CN101314277B CN 101314277 B CN101314277 B CN 101314277B CN 2008100999706 A CN2008100999706 A CN 2008100999706A CN 200810099970 A CN200810099970 A CN 200810099970A CN 101314277 B CN101314277 B CN 101314277B
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- nozzle
- cage group
- jet head
- group
- liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2002/14475—Structure thereof only for on-demand ink jet heads characterised by nozzle shapes or number of orifices per chamber
Abstract
A liquid ejecting head includes a plurality of nozzle groups each including a plurality of nozzle openings; and a plurality of pressure generating chambers that cause liquid to be ejected from the nozzle openings. A plurality of recessed portions are formed at a nozzle forming member, the recessed portions each having a thickness smaller than a thickness of the nozzle forming member, the nozzle openings being formed at the recessed portions. A set of at least one of the plurality of nozzle openings included in each single nozzle group defines a nozzle set, the nozzle set being arranged to correspond to each of the pressure generating chambers. The nozzle groups each have a plurality of nozzle sets in an array, the nozzle sets of one of the nozzle groups being relatively shifted from the nozzle sets of another one of the nozzle groups in a nozzle-set-array direction.
Description
Technical field
The present invention relates to jet head liquid and liquid injection apparatus such as ink jet recording head, particularly have and arrange the pressure generating chamber a plurality of nozzle sets that nozzle opening forms are set and are communicated with nozzle opening and make liquid from jet head liquid that ejects with this pressure generating chamber corresponding nozzle opening and the liquid injection apparatus that possesses this injector head by making pressure generating chamber produce pressure oscillation.
Background technology
Liquid injection apparatus is the device that possesses jet head liquid that can atomizing of liquids and spray various liquid from this jet head liquid.As the representative device of this liquid injection apparatus, for example can enumerate the ink jet recording head (being designated hereinafter simply as record head) that has as jet head liquid and from the nozzle opening of record head the black liquid of aqueous body is dropped on recording mediums such as record-paper (injection object) with the form Jetting type bomb for fire extinguishing of black drop and go up the image recording structures such as ink-jet printer that the back forms point, writes down thus.In addition, in recent years, not only liquid injection apparatus is used for this image recording structure, also is used for the various manufacturing installations such as manufacturing installation of the colour filter of LCD etc.
The injection of the black drop in the above-mentioned ink-jet printer (being designated hereinafter simply as printer), be from the driving signal that contains a series of a plurality of injection pulses, optionally injection pulse to be imposed on pressure generation unit (for example piezoelectric vibrator (electricapparatus inverting element) or heater element (electricity-thermal conversion element)), it is driven, make the black liquid in the pressure generating chamber produce pressure oscillation thus, by controlling (for example, with reference to the patent documentation 1) that this pressure oscillation is carried out.
Patent documentation 1: the spy opens the 2002-103619 communique
But, seeking in this kind printer with still less ink amount document image etc. effectively.Particularly under situation about image being recorded on the record-paper, might be because the moisture that contains in the black liquid produce distortion (concavo-convex) on record-paper, or the document image generation oozes and spread and sink in, so preferably make total amount that bullet drops on the black liquid on the record-paper as much as possible less.In addition,, then need frequently to change print cartridge, aspect operating cost, increase user's burden thus, in addition, also have problems from the viewpoint of environmental protection if the consumption of black liquid in the print cartridge is fast.
Summary of the invention
The invention that the present invention In view of the foregoing finishes just, its purpose are to provide a kind of can effectively bury the liquid injection apparatus that sprays the zone on the object with still less amount of liquid and with ink dot.
Jet head liquid of the present invention is to achieve these goals and the invention that proposes, is to have a plurality of nozzle sets and possess each nozzle opening that is used for from constituting nozzle sets to eject the jet head liquid of the pressure generating chamber of liquid, it is characterized in that,
The thickness that forms above-mentioned pressure generating chamber side forms the concavity portion of the thin thickness of member than nozzle, forms nozzle opening in this concavity portion,
Group with a plurality of nozzle openings in the same nozzle sets is the nozzle cage group, and this nozzle cage assembly is set as corresponding with same pressure generating chamber,
The adjacent nozzle cover assembly of different spray nozzles group is set to the state that the direction relativity shift is set at nozzle cage group row.
By this formation, group with a plurality of nozzle openings in the same nozzle sets is the nozzle cage group, with this nozzle cage group arrange be arranged to corresponding with same pressure generating chamber, so injection action that can be by once simultaneously from each nozzle opening atomizing of liquids of the corresponding nozzle cage group of pressure generating chamber of driven object, by the liquid that sprays from each nozzle opening, can bury the regulation zone of spraying on the object effectively with point with the amount of liquid that is less than in the past.Thus, can be more in the past than the consumption that suppressed liquid better, its result for example can suppress the distortion or the oozing of document image of the record-paper that caused by moisture and spread and sink in.In addition, owing to can suppress the consumption of liquid, so can help the reduction or the environmental protection of operating cost.
In addition, each nozzle cage group with each nozzle cage group of the nozzle sets of the side in the state configuration adjacent nozzle group that the direction relativity shift is set at nozzle cage group row and the opposing party's nozzle sets, so promptly box lunch can't generate pressure generating chamber when the nozzle cage group is listed as the width that is provided with on the direction owing to the situation on making lessly, promptly when the nozzle cage group in the nozzle sets uniformly-spaced being configured in nozzle cage group row when being provided with on the direction, only make injecting time different by a side nozzle sets and the opposing party's nozzle sets, can not increase the scanning times (path) of head yet, will put arrangement point-blank with certain interval and can be provided with on the direction at nozzle cage group row.Its result can help the raising of liquid inject process speed such as writing speed.
In said structure, can adopt each nozzle opening that will constitute said nozzle cover group that the structure of the oblique configuration of direction is set with respect to nozzle cage group row.
According to this structure, by each nozzle opening that the oblique configuration of direction constitutes the nozzle cage group being set with respect to nozzle cage group row, the nozzle cage group row that can change each nozzle opening from the interval (for example forming the design load of density) of regulation are provided with the configuration space of direction, enlarge the nozzle opening interval each other in the same nozzle cage group.Thus, can improve ease of processing when being processed to form nozzle opening by stamping-out.
In addition,, can suppress owing to the liquid harmful effect that causes located adjacent one another of spraying by enlarging the nozzle opening interval each other in the same nozzle cage group, thus, the bending of circling in the air of the liquid in the time of can alleviating from each nozzle opening atomizing of liquids.
And then if the nozzle opening atomizing of liquids in the same nozzle cage group, 2 points are provided with the direction arranged askew with respect to nozzle cage group row, spray on the object and be formed on record-paper etc.Form point by arranged askew thus, can nozzle cage group row be provided with direction and with the direction of its quadrature on have bias ground to cover a regulation zone with point.
In this structure, can adopt the configuration direction of each nozzle opening that constitutes said nozzle cover group the structure that direction has 45 ° angle to be set with respect to nozzle cage group row.
According to this structure, be configured to direction angle at 45 is set by each nozzle opening that will constitute the nozzle cage group with respect to nozzle cage group row, can in the space of irreducible minimum, expand the interval of nozzle opening the biglyyest.
In addition, in this structure, the side-play amount of a preferred nozzle cage group and another nozzle cage group be the nozzle cage group configuration space P 1/2.
Wherein, " configuration space of nozzle cage group " is meant from the distance at center to the center of its adjacent nozzles cover group of this nozzle cage group.
In addition, in said structure, preferably (n: arranged spaced natural number) constitutes each nozzle opening of nozzle cage group with P/n.
In addition, in this structure, preferred n=4.
In addition, in above-mentioned each structure, can adopt above-mentioned concavity portion to form and contain the structure of each nozzle opening that constitutes same nozzle cage group by each nozzle cage group.
According to this structure, the thickness of slab of the bottom of concavity portion is compared thinner with thickness of slab on every side, so by offering nozzle opening in the bottom of this concavity portion, alleviate the load to the formpiston (drift) that uses in the plastic working at this moment, can place buckling of formpiston etc.In addition, concavity portion is general for each nozzle opening that constitutes same nozzle cage group, so compare with the structure that forms concavity portion at each nozzle opening, it is easier to process, and can guarantee the intensity of drift in addition.
In addition, in above-mentioned each structure, can also adopt the structure that separately forms above-mentioned concavity portion by each nozzle opening.
According to this structure, by the concavity portion that is arranged by each nozzle opening branch, thereby can make each nozzle opening around the shape unanimity, the bending of circling in the air that can alleviate the liquid that sprays from each nozzle opening thus.
And then, preferably also have the liquid that is used to make in the pressure generating chamber and produce the organization of stres of pressure oscillation,
Described organization of stres is made of electric-mechanical inverting element or electricity-thermal conversion element.
In addition, liquid injection apparatus of the present invention is characterised in that to possess the jet head liquid of above-mentioned any structure.
Description of drawings
Fig. 1 is the stereogram of the structure of explanation printer.
Fig. 2 is the major part cutaway view of the structure of declare record head.
Fig. 3 is the exploded perspective view of the structure of explanation channel unit.
Fig. 4 is the block diagram of the electric structure of explanation printer.
Fig. 5 is the figure that explanation drives the structure of signal.
Fig. 6 is the major part vertical view that the explanation stream forms the structure of substrate.
Fig. 7 is the Y-Y line cutaway view among Fig. 6.
Fig. 8 is the figure of the configuration relation of each nozzle sets of explanation.
Fig. 9 (a) is the schematic diagram of explanation in the structure of the point that is used to form unit picture element in the past, (b) is the schematic diagram of the structure of the explanation point that is used to form the unit picture element among the present invention.
Figure 10 is the curve map of the relation of expression ink amount and spot diameter.
The figure of the relation of the concentration of the black liquid of Figure 11 ink amount that to be expression spray to unit picture element and this unit picture element.
Figure 12 is the major part vertical view that stream forms the structure of substrate in explanation second embodiment.
Figure 13 is the figure of the configuration relation of each nozzle sets in explanation second embodiment.
Figure 14 is the schematic diagram of the structure of the explanation second embodiment mid point.
Among the figure: 1-printer, 2-record head, 6-record-paper, 16-nozzle opening, 20-piezoelectric vibrator, 24-drive signal generation circuit, 26-pressure generating chamber, 28-nozzle plate, 33-nozzle cage group, 34-concavity portion, 34 '-concavity portion.
The specific embodiment
Below, be used to implement preferred forms of the present invention with reference to description of drawings.Wherein, in embodiment described below, carry out various qualifications, but with regard to scope of the present invention, short of in the following description special record limits purport of the present invention, just is not limited to these embodiments as the preferred embodiments of the present invention.In addition, in the following description, as liquid injection apparatus of the present invention, the ink-jet printer (following brief note is a printer) that illustration is shown in Figure 1.
Stand 4 constitutes: to be installed by the state that is erected at 9 supportings of guide rod on the main scanning direction, by the work of stand mobile device 7, move on main scanning direction along guide rod 9.The position of the main scanning direction of stand 4 is detected by linear encoder 10, and detection signal is sent to printer controller 12 (with reference to Fig. 4) as positional information.Thus, printer controller 12 can be controlled operation of recording (injection action) of being undertaken by record head 2 etc. simultaneously according to the scanning position from the position information confirming stand 4 (record head 2) of this linear encoder 10.
In addition, in the moving range of record head 2 and become the initial position of the sweep starting point of record head 5 than the set positions in the platen 5 more close outsides.Be provided with capping mechanism 13 at this initial position.This capping mechanism 13 comes the nozzle face of seal record 2 by lid member 14, prevents the evaporation from the black liquid solvent of nozzle opening 15 (with reference to Fig. 2).In addition, this capping mechanism 13 is used for applying negative pressure and forcibly attracting the cleaning of the black liquid of discharge to move from nozzle opening 15 to the nozzle face of sealing state.
Fig. 2 is the major part cutaway view of the structure of the above-mentioned record head 2 of explanation.This record head 2 has shower nozzle box 16, is accommodated in the executing agency 17 in this shower nozzle box 16, the channel unit 18 that engages with the bottom surface (front end face) of shower nozzle box 16 etc.Above-mentioned shower nozzle box 16 is that resin is made by epoxy for example, and portion is formed with the sky portion 19 of taking in that is used to take in executing agency 17 within it.Executing agency 17 has a plurality of piezoelectric vibrators 20 of demarcating into the broach shape (be equivalent to organization of stres of the present invention, electric-mechanical inverting element a kind of) and engages the fixed head 21 of this piezoelectric vibrator 20.In addition, on each piezoelectric vibrator 20 of executing agency 17, be connected with flexible cable 22, provide driving signal from drive signal generation circuit 24 (with reference to Fig. 4) by this flexible cable 22.
The piezoelectric vibrator 20 of present embodiment be with the direction of direction of an electric field quadrature on the piezoelectric vibrator of so-called longitudinal vibration mode of displacement.If be supplied to the driving signal, then with the direction of the stacked direction quadrature of piezoelectrics and electrode on displacement (stretching).In addition, each piezoelectric vibrator 20 is demarcated with the spacing identical with the formation spacing of the pressure generating chamber 26 of channel unit 18, with respect to the corresponding piezoelectric vibrator 20 of a pressure generating chamber 26 (with reference to Fig. 6).
Fig. 3 is the exploded perspective view of structure of the channel unit 18 of explanation present embodiment.This channel unit 18 is by the one side engagement nozzle plate 28 that forms substrate 27 in the balancing gate pit (nozzle forms a kind of of member), after the another side of balancing gate pit's formation substrate 27 engages oscillating plate 29, carry out integrated, make thus, as shown in Figure 2, a series of black liquid stream of formation from reservoir 30 to black liquid supply port 31, pressure generating chamber 26, nozzle connected entrance 32 and nozzle opening 15.
Said nozzle plate 28 is the metal thin plates that are equipped with a plurality of nozzle openings 15 at the above-listed shape of sub scanning direction.In the present embodiment, utilizing the sheet material of stainless steel to constitute this nozzle plate 28, row (nozzle sets) multiple row of nozzle opening 15 is set, is 2 row in the present embodiment.1 nozzle sets for example is provided with 360 nozzle openings 15 by arrangement and constitutes.In addition, with the group of a plurality of nozzle openings 15 in the same nozzle sets, for example the group of 2 adjacent nozzle openings 15 is a nozzle cage group 33 on sub scanning direction, each nozzle cage group 33 is corresponding one by one with pressure generating chamber 26 (balancing gate pit forms the empty portion 38 of substrate 27) respectively, is configured to 180dpi on sub scanning direction.Therefore, in the present embodiment, constitute with respect to the nozzle cage group 33 of a pressure generating chamber 26 configuration 1 cover, the i.e. group of 2 nozzle openings 15.
In addition, in the present embodiment, as Fig. 6 and shown in Figure 7, make nozzle plate 28 recessed to thickness direction midway, be formed with under general the overlooking of each nozzle opening 15 that constitutes same nozzle cage group 33 by each nozzle cage group and be the concavity portion 34 of elliptical shape (second nozzle).In addition, offer each nozzle opening 15 respectively in the bottom of this concavity portion 34.That is, concavity portion 34 forms and comprises each nozzle opening that constitutes same nozzle cage group.Because it is thinner that the thickness of slab of the bottom of this concavity portion 34 is compared with thickness of slab on every side, so offer nozzle opening 15, can alleviate the load of the formpiston (drift) that uses in the plastic working to this moment thus in the bottom of this concavity portion 34, place buckling of formpiston etc.In addition, concavity portion 34 is general at each nozzle opening 15 that constitutes same nozzle cage group 33, so compare with the structure that forms concavity portion at each nozzle opening, easier processing in addition, can guarantee to be used to form the intensity of the drift of concavity portion.
Wherein, each nozzle sets is with the state that relativity shift on the direction is set at nozzle cage group row each nozzle cage group 33 of a nozzle sets and each nozzle cage group 33 of another nozzle sets to be configured on the nozzle plate 28.About this point as described later.
The balancing gate pit that is configured between nozzle plate 28 and the oscillating plate 29 forms substrate 27, it is the tabular member that is divided the empty portion (balancing gate pit's sky portion) 38 that is formed with the part that becomes black liquid stream, specifically peristome 36, the slot part 37 that becomes black liquid supply port 31 that becomes reservoir 30 is arranged and become pressure generating chamber 26, in the present embodiment, be by making to handling as silicon wafer enforcement anisotropic etching with crystalline base material.Above-mentioned empty portion 38 is concavity portions elongated on main scanning direction, constitutes: an end is communicated with peristome 36 by slot part 37, and the other end is communicated with the nozzle opening 15 of nozzle plate 28 by nozzle connected entrance 32 simultaneously.In addition, this sky portion 38 is disposed with a plurality of on balancing gate pit's formation substrate 27 along sub scanning direction.
Above-mentioned oscillating plate 29 for example is by as Thin Elastic membranous part 40, stacked PPS (polyphenylene sulfide) resin molding on the surface of metal gripper shoes 39 such as stainless steel and the composite board that obtains constitutes.On this oscillating plate 29, be formed with distortion corresponding and can make the vibrating reed portion 41 of black liquid pressure generating chamber 26 in (liquid a kind of) generation pressure oscillation with the telescopic drive of piezoelectric vibrator 20.This vibrating reed portion 41 constitutes: utilize etch processes the gripper shoe 39 around it to be removed and as just Thin Elastic membranous part 40 under the part of the front end face that will connect piezoelectric vibrator 20 state residual as island portion 42.
In addition, on this oscillating plate 29, be formed with the sealing load chamber and form the opening surface of peristome 36 of substrate 27 and softness (compliance) portion 43 that the part of reservoir 30 is divided.About this flexible portion 43, remove the gripper shoe 39 in the zone corresponding by utilizing etching and processing with reservoir 30 (peristome 36), and only as Thin Elastic membranous part 40.In addition, this flexible portion 43 is damper (damper) performance functions of relaxing of the black hydraulic couplings change in the reservoir 30 as to the driving of piezoelectric vibrator 20 time.
Above-mentioned channel unit member of formation is that oscillating plate 29, balancing gate pit form on substrate 27 and the nozzle plate 28, offers respectively in the mode of the thickness of slab direction that connects each member and can insert the datum hole 44 (44a, 44b, 44c) that leads to alignment pin.In addition, each channel unit member of formation is by inserting the location that logical alignment pins carry out relative position at each datum hole 44, utilizes bonding agent etc. to engage then, and the attitude that is positioned at downside with nozzle plate 28 is fixing by shower nozzle box 16.
Fig. 4 is the block diagram of the electric structure of expression printer.Printer 1 in the present embodiment briefly is made of printer controller 12 and print engine 45.Printer controller 12 has: input is from the external interface of the print data of external device (ED)s such as main frame (exterior I/F) 46, as the temporary transient RAM 47 that stores the working storage of various data etc., stored and be used for the control program that various data handle or the ROM 48 of font data and diagram function etc., the control part 49 of the control of each one of carrying out, the oscillating circuit 50 of clocking, generation offers the drive signal generation circuit 24 of the driving signal of record head 2, be used for and by the jet data that obtains according to each some expanding printing data or drive the internal interface (inner I/F) 52 that signal etc. is input to record head 2.
Above-mentioned print engine 45 has record head 2, stand travel mechanism 7, paper advance mechanism 8 and linear encoder 10.Stand travel mechanism 7 constitutes CD-ROM drive motor that this stand 4 advances etc. by the stand 4 that record head 2 is installed with by toothed belt etc., at main scanning direction record head 2 is moved.Paper advance mechanism 8 is to be made of paper pushing motor and feeding-in roll etc., sends record-paper 6 in turn and carries out subscan.In addition, linear encoder 10 will with the positional information of the corresponding encoder pulse of scanning position that carries the record head 2 on stand 4 as main scanning direction, export to control part 49 by inner I/F.
Above-mentioned drive signal generation circuit 24 produces a series of driving signals that comprise a plurality of injection pulses (injection waveform).This injection pulse is to carry out telescopic drive ejects black drop from nozzle opening 15 pulse to piezoelectric vibrator 20, drives signal COM as illustrated in Figure 5 and comprise 2 injection pulses (the first injection pulse P1, the second injection pulse P2) in a record period T.In addition, drive signal generation circuit 24 produces this driving signal COM repeatedly in each record period T.These injection pulses P1, P2 are that the signal by same waveform as constitutes, and constitute and contain: the vibration damping key element p5 that makes expansion key element p1 that current potential rises, keeps the expansion of stipulated time to keep key element p2, make injection key element p3 that current potential descends, keep the contraction of stipulated time to keep key element p4 and to intermediate potential current potential is recovered from potential minimum VL potential minimum VL with the form of heavy gradient to potential minimum CL from maximum potential VH maximum potential VH with the constant gradient of the degree that do not make black drop and spray to maximum potential VH from intermediate potential VM.
If these injection pulses P1, P2 are offered piezoelectric vibrator 20, when supplying with each injection pulse P1, P2, the black drop with ormal weight penetrates from 2 nozzle openings 15 that constitute 1 nozzle cage group 33 simultaneously.In the present embodiment, the amount of the black drop that ejects from a nozzle opening 15 is configured to 5pl.That is, by an injection pulse is imposed on piezoelectric vibrator 20, thereby once eject the black drop that each 5pl amounts to 10pl from each nozzle opening 15 of the pressure generating chamber 26 of correspondence.
In addition, when utilizing printer 1 on recording mediums such as record-paper, to form unit picture element, constitute: eject black drop continuously by using the first injection pulse P1 and the second injection pulse P2, thereby a plurality of black drops are fallen on the record-paper 6 at bullet on the main scanning direction.Wherein, in the present embodiment, the resolution ratio in the design of unit picture element (base resolution or point form the design load of density) is vertical (sub scanning direction) * horizontal (main scanning direction)=360dpi * 360dpi (=70 μ m * 70 μ m).That is, put pen to paper drop and form a little, form unit picture element by burying this zone with this point to the regional bullet that is configured to this size.
Then, the embodiment to the record head 2 in the above-mentioned printer 1 describes.Fig. 6 is the major part vertical view that the balancing gate pit forms substrate 27, and Fig. 7 is the Y-Y line cutaway view of channel unit 18, and Fig. 8 is the figure of the configuration relation of each nozzle sets of explanation.As shown in Figure 6, constitute a nozzle cage group 33 by two adjacent nozzle openings 15, each nozzle opening 15 that constitutes this nozzle cage group 33 is arranged along sub scanning direction.Each nozzle cage group 33 in the same nozzle sets as shown in Figure 8, for example be provided on the sub scanning direction with the prescribed distance P corresponding to 180dpi, (n: natural number) arrange by spacing with the P/n less than prescribed distance P for each nozzle opening 15 of formation nozzle cage group 33.In the present embodiment, each nozzle opening 15 is spacing (nozzle cage group row are provided with direction) upward arrangement side by side on sub scanning direction of P/4 with for example 720dpi.In addition, at nozzle cage group row the state that direction (being sub scanning direction in the present embodiment) goes up relativity shift to be set, each nozzle cage group 33 of a nozzle sets A and each nozzle cage group 33 of another nozzle sets B in the configuration adjacent nozzles group.More specifically say, for example become the mode of 360dpi, promptly become 1/2 the mode of the configuration space P of the nozzle cage group 33 in the same nozzle sets according to the side-play amount of a nozzle sets A and another nozzle sets B, on nozzle plate 28, be configured to each nozzle sets staggered.Therefore, each nozzle opening 15 of each nozzle cage group 33 is observed with 720dpi (P/4) on sub scanning direction and is arranged.
If so constitute, even if under the situation of the width of the sub scanning direction that can't generate pressure generating chamber 26 or piezoelectric vibrator 20 for the situation on making lessly, promptly can't on sub scanning direction (nozzle cage group row are provided with direction), equally spaced dispose under the situation of a nozzle cage group 33 in the nozzle sets with less spacing (high density), only make the injecting time in the main scanning different with another nozzle sets B by a nozzle sets A, scanning times (path) is increased, can on sub scanning direction on the sub scanning direction, will put arrangement point-blank with certain interval (being 720dpi in the present embodiment).Its result has and helps improve writing speed.
As shown in Figure 7, the island portion 42 of oscillating plate 29 is provided with pressure generating chamber 26 relative nozzle cage groups 33 one to one with the piezoelectric vibrator 20 of executing agency 17.The adjacent nozzles opening 15 of formation nozzle cage group 33 overlaps 26 configurations one of a pressure generating chamber each other.Each pressure generating chamber 26 corresponding with this nozzle cage group 33 is divided wall 54 each other as shown in Figure 7 and divides.So, with each pressure generating chamber 26 corresponding nozzle cage group 33 that dispose the group that becomes a plurality of nozzle openings 15, there is no need thus shown in the past, a nozzle opening 15 to be provided with pressure generating chamber 26 one to one.That is, in the nozzle sets that the nozzle opening 15 by same number constitutes, with make pressure generating chamber and nozzle opening one to one in the past structure compare, can reduce number (reducing half) with the corresponding pressure of these nozzle openings 15 generating chamber 26.Perhaps, about nozzle sets, can under the situation of the number that does not increase piezoelectric vibrator 20 or pressure generating chamber 26, increase the number (multiplication) of nozzle opening 15.In the present embodiment, a nozzle sets is made of 360 nozzle openings 15, and is relative therewith, the pressure generating chamber corresponding 26 with these nozzle openings 15 by it half promptly 180 constitute.Thus, compare, can thicken the division wall 54 that each pressure generating chamber 26 is divided with the structure in the past that pressure generating chamber 26 is set with the identical quantity of the number of nozzle opening 15.Its result can make the rigidity of dividing wall 54 than in the past structure height, can prevent the influence of the pressure wave that is produced by injection action of each adjacent pressure generating chamber 26.Thus, can prevent to crosstalk, make spray characteristic stable.
In addition, as shown in Figure 5, the record head 2 that utilizes said structure by flexible cable 22 when piezoelectric vibrator 20 provides injection pulse, at first piezoelectric vibrator 20 is shunk on the leement duration direction by expansion key element p1, island portion 42 displacement on away from the direction of pressure generating chamber 26, thus the pressure generating chamber 26 of driven object from the benchmark cubical expansion corresponding with intermediate potential VM to the allowance for expansion corresponding with maximum potential VH.By the expansion of this pressure generating chamber 26, in each pressure generating chamber 26, provide black liquid by black liquid supply port 31 from reservoir 30 sides.In addition, the swelling state of this pressure generating chamber 26 can only be kept during the supply that keeps key element p2 of expanding.
Subsequently, provide and spray key element p3 and piezoelectric vibrator 20 elongations, island portion 42 is to the direction displacement near pressure generating chamber 26.Thus, pressure generating chamber 26 sharply shrinks to the retraction volume corresponding with potential minimum VL from allowance for expansion.By the contraction of pressure generating chamber 26,, eject black drop simultaneously from each nozzle opening 15 of the nozzle cage group 33 corresponding with driven object pressure generating chamber 26 to the black liquid pressurization of inside.The contraction state of pressure generating chamber 26 is kept during the supply that shrink to keep key element p4, during this since the interior pressure of the pressure generating chamber 26 that the injection of black drop reduces by its intrinsic vibration and rising once more.As one man provide vibration damping key element p5 with its rise time.By providing of this vibration damping key element p5, pressure generating chamber 26 expands and returns to the benchmark volume, and the black hydraulic coupling change in the pressure generating chamber 26 is absorbed.
But, as mentioned above, the unit picture element in the present embodiment is configured to 360dpi * 360dpi.Therefore, in order on record-paper, to form unit picture element, be necessary the whole square area of burying 70 μ m * 70 μ m with point.When utilization printer in the past forms unit picture element on record-paper, the point about the diameter 100 μ m that this zone forms and above-mentioned square is external.In addition, needed to consume the black liquid of more amount in order to form this point, so might produce distortion (concavo-convex) owing to the moisture that contains in the black liquid on record-paper, perhaps document image produces to ooze and spreads and sinks in the past.In addition,,, aspect operating cost, increased burden thus, in addition, also had problems aspect the viewpoint of environmental protection the user so need the frequent print cartridge of changing because the consumption of the black liquid in the print cartridge is fast.
In view of this point, utilize printer 1 of the present invention, can on record-paper, more effectively bury a little with ink amount still less.
Here, Figure 10 is the curve map of the relation of expression ink amount and spot diameter.As shown in the drawing, the curve map of representing the relation of ink amount and spot diameter as can be known is non-linear.In addition, the needed ink amount of point that forms diameter and be 100 μ m is 40pl, and is relative therewith, and half that the forms above-mentioned diameter i.e. needed ink amount of point of 50 μ m is not 20pl, and 5pl is enough.
Therefore, in this structure, can form unit picture element with the ink amount of 5pl * 4=20pl.That is, can form unit picture element with half ink amount greater than structure in the past.In addition, can form a plurality of points with injection action once simultaneously, in the present embodiment, point on the sub scanning direction form density in view of outward appearance with do not use structure in the past of the present invention and be in a ratio of 2 times, so when the full version of the what is called in the regulation zone of seamlessly burying record-paper 6 with point writes down, can not cause the increase of the scanning times (path) of head.
Then, verify effect of the present invention from the concentration aspect of unit picture element.
The figure of the relation of the lettering concentration of Figure 11 ink amount that to be expression spray to unit picture element and this unit picture element.In the figure, the graphical representation of solid line is utilized the experimental result of structure of the present invention (making a plurality of nozzles structure corresponding with pressure generating chamber), and the graphical representation of dotted line is utilized the experimental result of structure (making the single nozzle structure corresponding with pressure generating chamber) in the past.As can be known as shown in the drawing, utilize structure in the past, the OD of the lettering concentration of unit of display pixel (Optical Density) value is shown linear function greatly along with the increase of spraying black liquid form increases, relative therewith, in structure of the present invention, with respect to the increase of spraying ink amount, the OD value increases with the form of logarithmic function.
That is, in the scope of the black liquid emitted dose that is seamlessly covering regulation zone until black liquid (point), for example shown in arrow X among Figure 11, the OD value when spraying the black liquid of same amount, structure of the present invention is greater than in the past structure.In addition, as can be known, about the emitted dose of the black liquid that is used to obtain identical OD value, compare with structure in the past shown in arrow Y, structure of the present invention only needs less amount just can finish.This be because, bury the regulation zone and compare with promptly putting with a black liquid, bury the black liquid of needs with a plurality of points and in wider scope, expand, the area coverage increase of black liquid.Therefore,, can be effectively bury the regulation zone of spraying on the object, be particularly suitable for forming the situation of image by the concentration gray scale that the depth by black liquid embodies gray scale with black liquid according to structure of the present invention.
So, about the printer 1 that carries above-mentioned record head 2, for being the nozzle cage group 33 of group with a plurality of nozzle openings adjacent on sub scanning direction 15, correspondence is provided with pressure generating chamber 26 one by one, spray black drop from each nozzle opening 15 of the nozzle cage group 33 corresponding simultaneously so can utilize once injection action (ejection action) with driven object pressure generating chamber 26, by the black drop that sprays from each nozzle opening 15, can be to be less than in the past ink amount effectively with putting the regulation zone of burying on the record-paper (injection object).Thus, can suppress the consumption of black liquid, bullet drops on the total amount of the black liquid on the record-paper in the time of promptly can suppressing document image etc., and its result can suppress the distortion or the oozing of document image of the record-paper that caused by the moisture that contains in the black liquid and spread and sink in.In addition, can suppress the consumption of black liquid, so can help the reduction or the environmental protection of operating cost.
In addition, in the present invention, about piezoelectric vibrator 20, there is no need change and form spacing, can directly quote the member in the structure in the past, so very easy, the size of each piezoelectric vibrator 20 is also with identical in the past, so displacement efficient can not reduce.
But, the present invention is not limited to above-mentioned embodiment, can carry out various distortion according to the scope record of technical scheme.
Figure 12 is the major part vertical view that the balancing gate pit forms substrate 27 in second embodiment of the present invention.In addition, Figure 13 is the figure of the configuration relation of each nozzle sets in the explanation present embodiment.
As shown in figure 12, the structure of present embodiment is constituting on 1 nozzle cage group 33 this point identically with above-mentioned first embodiment by 2 adjacent nozzle openings 15, but it is different with first embodiment to constitute the arrangement of each nozzle opening 15 of nozzle cage group 33.Particularly, in the above-described first embodiment, constitute along nozzle cage group row each nozzle opening 15 that direction (sub scanning direction) is arranged formation nozzle cage group 33 is set, relative therewith, in the present embodiment, with respect to nozzle cage group row each nozzle opening 15 that the oblique configuration of direction (sub scanning direction) constitutes nozzle cage group 33 is set.In addition, the configuration direction of each nozzle opening is provided with the angle that direction has 45 ° with respect to nozzle cage group row.That is, with respect to the imaginary line D1 that connects the center of each nozzle cage group 33 in the same nozzle sets, connecting the imaginary line D2 at center of each nozzle opening 15 and the angle of above-mentioned D1 becomes 45 °.
As shown in figure 13, each the nozzle cage group 33 in the same nozzle sets is the same with above-mentioned first embodiment is provided on the sub scanning direction with prescribed distance P.In addition, each nozzle opening 15 of formation nozzle cage group 33 becomes P/n (n: natural number) at the configuration space that nozzle cage group row are provided with on the direction.In this embodiment, each nozzle opening 15 is provided with configuration space on the direction at nozzle cage group row to become 720dpi is P/4.In addition, the state of relativity shift on the direction to be set, each nozzle cage group 33 of a nozzle sets A and each nozzle cage group 33 of another nozzle sets B in the configuration adjacent nozzles group at nozzle cage group row.Side-play amount with a nozzle sets A and another nozzle sets B is the mode of 360dpi, promptly according to 1/2 the mode of the configuration space P that becomes the nozzle cage group 33 in the same nozzle sets, is configured to each nozzle sets staggered on nozzle plate 28.Therefore, each nozzle opening 15 of two nozzle sets is observed with 720dpi (P/4) on sub scanning direction and is arranged.
So, by each nozzle opening 15 that the oblique configuration of direction (sub scanning direction) constitutes nozzle cage group 33 being set with respect to nozzle cage group row, thereby the nozzle cage group row that can change each nozzle opening 15 are provided with the configuration space of direction, be the packing density (basic exploring degree) of sub scanning direction, and enlarge nozzle opening 15 interval each other in the same nozzle cage group 33.Particularly dispose each nozzle by with respect to nozzle cage group row tilt 45 ° mode of direction being set according to the configuration direction of each nozzle opening, thus can be in the space of irreducible minimum the biggest ground enlarged nozzle opening 15 interval each other.Thus, can improve ease of processing when metal nozzle plate 28 being implemented stamping-outs be processed to form nozzle opening 15.Promptly, in nozzle opening 15 approximating structures, might produce by stamping-out and add influence (distortion in aperture) that flow (the material structure slippage) of the nozzle plate base material in man-hour bring etc., but, can alleviate such influence by enlarged nozzle opening 15 interval each other as much as possible.
In addition, by enlarging nozzle opening 15 interval each other in the same nozzle cage group 33, the bending of circling in the air of the black liquid in the time of can suppressing from the black liquid of each nozzle opening 15 injections.About this point, when the nozzle opening 15 in same nozzle cage group 33 sprays black liquid simultaneously, confirm to exist each black liquid phase to repel and the phenomenon of the direction bending of circling in the air mutually.Think that its reason is, because the black liquid air drag each other and the difference of ambient air resistance, black liquid is to the little direction of resistance reason such as circle in the air.For such phenomenon, also can pass through the interval between the enlarged nozzle opening 15 as far as possible, suppress by the harmful effect that causes located adjacent one another of black liquid.Thus, can alleviate the bending of circling in the air of black liquid.
And then if the nozzle openings 15 in same nozzle cage group 33 spray black liquid, as shown in figure 14, the some key element that is made of 2 points is provided with direction (sub scanning direction) oblique (being 45 ° in the example of Figure 14) with respect to nozzle cage group row and is formed on the record-paper 6.Form point by such arranged askew, thereby can not have bias ground to bury the regulation zone with black liquid.Promptly, be provided with in the direction structure arranged along nozzle cage group row at point, can easily on this direction, bury black liquid, but with the direction of its quadrature on, the interval of injecting time or the point on black liquid circles in the air direction might change, so the problem that exists black liquid to be difficult to bury.Relative therewith, by direction arranged askew point is set with respect to nozzle cage group row, thereby can nozzle cage group row be provided with direction and with the direction of its quadrature on have bias ground to cover a zone of stipulating with point.
In addition, in the present embodiment, make nozzle plate 28 recessed to thickness direction midway, separately be formed with to overlook at each nozzle opening 15 and be the concavity portion 34 ' of elliptical shape (second nozzle) down.In addition, be circular depression under this concavity portion 34 ' overlooking that to be internal diameter than nozzle opening 15 big, the core in its bottom offers nozzle opening 15.That is, concavity portion 34 ' forms and comprises corresponding nozzle opening 15.So, by the concavity portion 34 ' that was arranged in 15 minutes by each nozzle opening, thereby can make each nozzle opening 15 around the shape unanimity, the bending of circling in the air that can alleviate the black liquid that sprays from each nozzle opening 15 thus.Wherein, in the present embodiment, can be shown in above-mentioned first embodiment, adopt in the general concavity portion 34 of each nozzle opening 15 that constitutes same nozzle cage group.
Wherein, in each above-mentioned embodiment, illustration the whole identical structures of opening diameter of each nozzle opening 15, but be not limited to this, can also adopt the different structure of diameter that makes each nozzle opening 15.For example, with respect in the said nozzle group with the opening diameter of corresponding each nozzle opening 15 of nozzle sets, set opening diameter significantly with the corresponding nozzle opening 15 of another nozzle sets, when forming point, spray black drop from the nozzle opening corresponding 15 with nozzle sets, when formation is a little bigger, can spray black drop from the nozzle opening 15 of two nozzle sets.Thus, can take into account the high image qualityization of the high speed and the document image of writing speed.
In addition, for example, in the respective embodiments described above, illustration with the group of 2 adjacent on sub scanning direction nozzle openings 15 structure as nozzle cage group 33, but be not limited to this.For example can also adopt with the group at the nozzle opening more than 3 15 adjacent on the sub scanning direction is the structure of nozzle cage group 33.
In addition, as organization of stres, be not limited to the piezoelectric vibrator 20 of illustrative a kind of so-called extensional vibration type as the electricapparatus inverting element in the respective embodiments described above, can also use equally as the piezoelectric element of a kind of bending vibration type of electricapparatus inverting element or magnetostriction element, as a kind of heater element of electrothermal transformating element etc.
And then, the present invention can also be used to constitute strip jet head liquid (line style jet head liquid) is moved with respect to apparatus main body but under fixing state the liquid injection apparatus of atomizing of liquids, described strip jet head liquid is configured to nozzle opening with the corresponding length of dominant record width of recording medium, obtains to form nozzle sets with prescribed distance.
In addition, in the superincumbent description,, be that example is illustrated with ink jet recording head 2, but the present invention can also be used for other jet head liquid as jet head liquid.For example, the look material injector head that uses in the manufacturing of the colour filter of LCD etc., the electrode material injector head that uses in the electrode of organic EL (ElectroLuminescence) display, FED (face active display) etc. forms, the living tissue organic matter that uses in the manufacturing of biochip (biochemical element) spray and use the present invention in first-class.
And then the present invention can also be used for the liquid injection apparatus beyond the above-mentioned printer.For example, can also be used for display manufacturing apparatus, electrode manufacturing apparatus, chip manufacturing device etc.
Claims (10)
1. jet head liquid, it has a plurality of nozzle sets and possesses the pressure generating chamber that is used for from each the nozzle opening atomizing of liquids that constitutes nozzle sets,
This jet head liquid
The thickness that is formed with described pressure generating chamber side forms the concavity portion of the thin thickness of member than nozzle, is formed with nozzle opening in this concavity portion,
Group with a plurality of nozzle openings in the same nozzle sets is the nozzle cage group, and this nozzle cage assembly is set as corresponding with same pressure generating chamber,
The adjacent nozzle cover assembly of different spray nozzles group is set to the state that the direction relativity shift is set at nozzle cage group row.
2. jet head liquid as claimed in claim 1 is characterized in that,
Each nozzle opening that constitutes described nozzle cage group is provided with the oblique configuration of direction with respect to nozzle cage group row.
3. jet head liquid as claimed in claim 2 is characterized in that,
The configuration direction that constitutes each nozzle opening of described nozzle cage group is provided with the angle that direction has 45 ° with respect to nozzle cage group row.
4. as any described jet head liquid in the claim 1～3, it is characterized in that,
The adjacent nozzle cover group of different spray nozzles group the nozzle cage group be provided with side-play amount on the direction be the nozzle cage group in the same nozzle sets configuration space P 1/2.
5. jet head liquid as claimed in claim 4 is characterized in that,
Each nozzle opening that constitutes described nozzle cage group is P/n at the configuration space that nozzle cage group row are provided with on the direction, and wherein n is a natural number.
6. jet head liquid as claimed in claim 5 is characterized in that,
n＝4。
7. as any described jet head liquid in the claim 1～3, it is characterized in that,
Described concavity portion constitutes: form by each nozzle cage group, and contain each nozzle opening that constitutes same nozzle cage group.
8. as any described jet head liquid in the claim 1～3, it is characterized in that,
Described concavity portion separately forms by each nozzle opening.
9. as any described jet head liquid in the claim 1～3, it is characterized in that,
This jet head liquid also has the liquid that is used to make in the pressure generating chamber and produces the organization of stres of pressure oscillation,
Described organization of stres is made of electro-machanical inverting element or electricity-thermal conversion element.
10. liquid injection apparatus, it possesses any described jet head liquid in the claim 1～9.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007144931 | 2007-05-31 | ||
| JP2007-144931 | 2007-05-31 | ||
| JP2007144931 | 2007-05-31 | ||
| JP2008003218 | 2008-01-10 | ||
| JP2008003218A JP5315697B2 (en) | 2007-05-31 | 2008-01-10 | Liquid ejecting head and liquid ejecting apparatus |
| JP2008-003218 | 2008-01-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101314277A CN101314277A (en) | 2008-12-03 |
| CN101314277B true CN101314277B (en) | 2010-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100999706A Expired - Fee Related CN101314277B (en) | 2007-05-31 | 2008-05-29 | Liquid ejecting head and liquid ejecting apparatus |
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| JP (1) | JP5315697B2 (en) |
| CN (1) | CN101314277B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100085703A (en) * | 2009-01-21 | 2010-07-29 | 삼성전기주식회사 | Ink-jet head |
| JP5793850B2 (en) * | 2010-11-05 | 2015-10-14 | セイコーエプソン株式会社 | Liquid ejecting head and liquid ejecting apparatus |
| JP6302401B2 (en) * | 2014-12-04 | 2018-03-28 | 株式会社東芝 | Inkjet head and printer |
| EP3461639B1 (en) * | 2017-09-27 | 2022-01-12 | HP Scitex Ltd | Printhead nozzles orientation |
| JP2021514876A (en) | 2018-03-12 | 2021-06-17 | ヒューレット−パッカード デベロップメント カンパニー エル．ピー．Ｈｅｗｌｅｔｔ‐Ｐａｃｋａｒｄ Ｄｅｖｅｌｏｐｍｅｎｔ Ｃｏｍｐａｎｙ， Ｌ．Ｐ． | Nozzle array and supply hole |
| US11305537B2 (en) | 2018-03-12 | 2022-04-19 | Hewlett-Packard Development Company, L.P. | Nozzle arrangements and supply channels |
| CN111556810B (en) * | 2018-03-12 | 2021-12-03 | 惠普发展公司，有限责任合伙企业 | Fluid ejection sheet |
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| IT1270861B (en) * | 1993-05-31 | 1997-05-13 | Olivetti Canon Ind Spa | IMPROVED INK JET HEAD FOR A POINT PRINTER |
| JP2002154199A (en) * | 2000-11-20 | 2002-05-28 | Konica Corp | Ink-jet image forming method and ink-jet image recording apparatus |
| JP2002248774A (en) * | 2001-02-23 | 2002-09-03 | Seiko Epson Corp | Ink-jet recording head and ink-jet recorder |
| JP2003080700A (en) * | 2001-09-12 | 2003-03-19 | Olympus Optical Co Ltd | Ink head |
| GB0220227D0 (en) * | 2002-08-30 | 2002-10-09 | Xaar Technology Ltd | Droplet deposition apparatus |
| JP2004114434A (en) * | 2002-09-25 | 2004-04-15 | Konica Minolta Holdings Inc | Inkjet recording head and inkjet recording method |
| JP2006035536A (en) * | 2004-07-23 | 2006-02-09 | Ricoh Co Ltd | Liquid ejection head, head cartridge, inkjet recording apparatus, and chemical agent suction device |
| JP4595659B2 (en) * | 2005-04-28 | 2010-12-08 | ブラザー工業株式会社 | Droplet ejecting apparatus and manufacturing method thereof |
| JP2006116972A (en) * | 2005-12-19 | 2006-05-11 | Canon Inc | Head spraying liquid medicine for lung inhalation, spraying apparatus equipped with the head and spraying method for the liquid medicine |
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| CN101314277A (en) | 2008-12-03 |
| JP5315697B2 (en) | 2013-10-16 |
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