CN1775529A - Ink jet head - Google Patents
Ink jet head Download PDFInfo
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- CN1775529A CN1775529A CN 200510125336 CN200510125336A CN1775529A CN 1775529 A CN1775529 A CN 1775529A CN 200510125336 CN200510125336 CN 200510125336 CN 200510125336 A CN200510125336 A CN 200510125336A CN 1775529 A CN1775529 A CN 1775529A
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Abstract
The invention provides an ink jet head for restraining the pressure oscillation generated in the ink jet head. The ink jet head comprises a main body, wherein, a sharing ink storage chamber is formed inside the main body; a plurality of nozzles and a plurality of depression boxes are dispersedly formed on the surface of the main body; one nozzle corresponds to one depression box, and one depression box corresponds to one nozzle; a plurality of single ink flow paths are arranged inside the main body; each single ink flow path reaches one corresponding nozzle from the sharing ink storage chamber through one corresponding deboss; the ink jet head further comprises an adjuster for allowing the increment or reduction of volume of the sharing ink storage space. When the pressure of the ink stored in the ink jet head changes, the increment or the reduction of the volume of the sharing ink storage space occur so as to ensure smooth pressure oscillation.
Description
It is that November 17, application number in 2004 are the 2004-332665 Japanese publication and the applying date to be that February 15, application number in 2005 are the priority of 2005-037351 Japanese publication that the application requires the applying date, and the content of above-mentioned patent documentation is in this application combined.
Technical field
The present invention relates to a kind of ink gun.
Background technology
Ink gun comprises: receive ink introducing port from the ink tank institute ink supplied that is arranged on the ink gun outside, ink is ejected into the nozzle of ink gun outside and the ink flow path that connects said nozzle and ink introducing port.
Common ink gun comprises a plurality of nozzles.When the resistance when ink flows in the ink flow path of arrival nozzle had nothing in common with each other on each nozzle, then print quality descended.Therefore, develop and a kind ofly open the technology of being put down in writing in the 2004-114423 communique the spy.This ink gun is included in 1 ink storeroom that forms in the ink gun and a plurality of single ink flow path that forms in ink gun.Each single ink flow path is communicated with 1 nozzle.Each single ink flow path is communicated with shared ink storeroom.The ink that imports from the ink introducing port is directed in the ink storeroom.The ink that is directed in the ink storeroom is assigned in a plurality of single ink flow paths.If shared ink storeroom is set in ink gun, the different problem on each nozzle of the resistance in the time of just can solving ink and in arriving the ink flow path of nozzle, flow.
The ink flow path that connects said nozzle and ink introducing port is formed in the ink gun.The ink gun that forms above-mentioned ink flow path is formed by the high material of rigidity, and the volume of above-mentioned ink flow path is constant.When at the shared ink storeroom of the formation midway of above-mentioned ink flow path, this shared ink storeroom may also be referred to as the part of ink flow path.Even at the shared ink storeroom of having formed of above-mentioned ink flow path midway, comprising shared ink storeroom also is constant at the volume of interior ink flow path.
Ink is incompressible.The volume of ink flow path is constant to combine with the incompressibility of ink, causes following problems easily.
Be difficult to equate to the providing ink amount of ink gun with from the quantity of ink that ink gun sprayed.If observe being divided into the short time, both had the time band of quantity delivered greater than spray volume, also have the time band of quantity delivered less than spray volume.
After ink gun had just begun to print action, the quantity delivered of ink produced bigger negative pressure less than spray volume thereby make in the ink gun.In this case, then incompressible ink can not arrive the position in place with respect to nozzle in advance.For the nozzle that does not carry out ink-jet, ink wherein preferably can be under capillary effect, keeps with respect to the front end face of nozzle slightly to the state of nozzle inside bend.This state is called state in place with respect to nozzle.If quantity delivered is less than spray volume, the quantity of ink deficiency in the ink gun then, ink is gone in the nozzle by suck-back.
After ink gun had just stopped printing action, the ink that flows was pushed to ink gun, thereby makes quantity delivered greater than spray volume under the effect of inertia force.In this case, owing to incompressible ink can't be enclosed in the ink flow path of constant volume, thereby cause ink from nozzle, to ooze out.
The situation that greater than spray volume ink oozed out from nozzle owing to quantity delivered does not preferably appear.Preferably do not occur because quantity delivered is gone into the ink suck-back less than spray volume the situation in the nozzle yet.In case ink is introduced in the nozzle, though to ink flow path that this nozzle is communicated with in ink exert pressure, ink can not spray in nozzle.Perhaps from the quantity of ink deficiency of nozzle ejection.For any one above-mentioned situation, all can cause the decline of print quality.Inventor of the present invention wants to keep good print quality by discovering, the pressure oscillation that suppresses ink in the ink gun in the ink gun course of action is very important.
Summary of the invention
The purpose of this invention is to provide a kind of ink gun, even, also can not produce bad result for the providing ink amount of ink gun with under the unequal situation of the quantity of ink that ink gun sprayed.
Another object of the present invention provides a kind of ink gun, during greater than spray volume, also can prevent that ink from oozing out from nozzle in quantity delivered.
Another object of the present invention provides a kind of ink gun, in quantity delivered during less than spray volume, and also can be sufficient from the quantity of ink of nozzle ejection.
Another object of the present invention provides a kind of ink gun, and the pressure oscillation on can the ink of inhibitory action in being stored in ink gun makes from the ink spray volume of nozzle ejection stable.
Another object of the present invention provides a kind of ink gun, can be suppressed at ink gun just begun to print after and just stopped printing after the action amplitude of the pressure oscillation that ink occurred in the ink gun, thereby the ink spray volume of stabilized nozzle spray.
Ink gun of the present invention has main body.The ink that is formed with shared ink storeroom and is used for being supplied from the main body outside in the inside of main body is directed to the shared ink flow path in the shared ink storeroom.On the 1st of aforementioned body, a plurality of nozzles have been formed dispersedly.A plurality of balancing gate pits on aforementioned body, have been formed dispersedly.The number of balancing gate pit is identical with the number of nozzle.1 nozzle is corresponding to 1 balancing gate pit, and 1 balancing gate pit is corresponding to 1 nozzle.
A plurality of single ink flow paths have been formed in the inside of main body.The number of single ink flow path equates with the nozzle number.1 nozzle is corresponding to 1 single ink flow path, and 1 single ink flow path is corresponding to 1 nozzle.1 single ink flow path arrives 1 corresponding nozzle from 1 balancing gate pit of shared ink storeroom via correspondence.
Ink gun of the present invention comprises the adjuster of the volume increase and decrease that allows shared ink storage space.
Wherein, so-called shared ink storage space is the space of accommodating ink from the ink introducing port of the outside institute of ink gun ink supplied and being used between the branch point of a plurality of single ink flow paths receiving, under the situation that has airtight air, the space that also comprises airtight air in this shared ink storage space, on the other hand, under the situation that does not have airtight air, only contain ink in this shared ink storage space.Above-mentioned shared ink flow path is the part of shared ink storage space.The part that above-mentioned shared ink storeroom also is shared ink storage space.In above-mentioned ink gun, have and discharge stream being stored in the ink that ink in the shared ink storeroom is directed to the outside of main body.In the use of ink gun, ink is discharged stream and is in the state of being filled by ink sometimes.At this moment, ink discharge stream also is the part of shared ink storage space.
Described adjuster can be made of the space of airtight air, and this air ink direct and in the described shared ink storage space contacts.The space of this airtight air is arranged on the shared ink flow path, and allow the volume increase and decrease of the ink in the shared ink flow path, perhaps, the space of this airtight air also can be arranged in the shared ink storeroom, and allow the volume increase and decrease of the ink in the shared ink storeroom, even the space of this airtight air can also be arranged on ink and discharge on the stream, and allows ink to discharge the volume increase and decrease of the ink in the stream.That is to say, as long as can allow the volume increase and decrease of the ink in the shared ink space.
Constituting under the situation of described adjuster by the mode in the part that air is enclosed in shared ink storage space, between air and ink, do not needing flexible sheet the two isolation.But ink is directly contacted with air.Even there is not the sheet material of isolating ink and air, ink can not enter in the airtight space that air arranged yet.And, between the space of the space of airtight air and filling ink, there is not fixed boundary, the space that comprises the two can be called shared ink storage space.In this case, the part of this shared ink storage space is the air storage space, is filling ink in remaining part.
After making ink and air directly contacting, can be along with between the two pressure differential and can move freely in the interface between ink and the air.Can obtain such effect in this case, that is, can be suppressed at ink gun just begun to print after and just stopped printing after the action amplitude of the pressure oscillation that ink occurred in the ink gun.
Make in shared storage space behind the airtight air, even for ink gun, the quantity delivered of its ink is different with spray volume, also can not produce bad result.Specifically, when quantity delivered during greater than spray volume, airtight air is compressed, and the volume of the ink in the shared ink storage space (being the volume of shared ink storage space and the difference of airtight volume of air) increases, thereby can suppress the excessive rising of ink pressure in the ink gun.On the other hand, and when quantity delivered during less than spray volume, airtight air expands, and the volume of the ink in the substantial shared ink storage space reduces, thereby can suppress the excessive descent of ink pressure in the ink gun.
Described adjuster also can be for shared ink storage space and the isolated flexible sheet of atmosphere.For example, a part that forms the wall of shared ink storeroom can have flexible.Perhaps, the wall of part or all of formation ink discharge stream can have flexible.That is to say as long as can regulate the volume of the ink in the described public ink storage space.
Under the situation that is made of the wall that shared ink storage space and atmosphere is isolated flexible material, no matter whether quantity delivered equals spray volume, and the pressure of ink can excessive variation.In this case, can be suppressed at ink gun effectively and just begin to print the amplitude that has stopped printing the pressure oscillation that ink occurred in the ink gun that is easy to occur after the action afterwards and just.
If with the wall energy enough flexible deformation of shared ink storage space, even, also can not produce bad result then for the providing ink amount of ink gun and under the unequal situation of the quantity of ink that ink gun sprayed with big gas phase separation.When quantity delivered during greater than spray volume, the ink volume in the shared ink storage space increases, thereby the excessive pressure on can the ink of inhibitory action in ink gun raises.When quantity delivered during less than spray volume, the ink volume reducing in the shared ink storage space, thereby the excessive pressure on can the ink of inhibitory action in ink gun descends.
If the space of airtight air is arranged on top with the junction of two streams of shared ink storage space, even then there is not flexible strip between the space of shared ink storage space and airtight air, ink also can not invade in the space of airtight air.
Preferably extend from the upstream side of above-mentioned junction of two streams to the flow direction of the ink that flows in above-mentioned shared ink storage space in the space of above-mentioned airtight air.Just, preferably the junction of two streams of the space of airtight air and shared ink storage space is arranged in the part that ink moves about from the top down.At this moment, the ink of Liu Donging can not invade in the space of airtight air.Between the space of shared ink storage space and airtight air, need not to be provided with flexible strip.
Aforementioned body also can make up a plurality of parts and form.For example aforementioned body can comprise the 1st main body and the 2nd main body that is fixed on the 1st main body.
At this moment, on the 1st main body, be pre-formed shared ink flow path and the 1st shared ink storeroom.On the 2nd main body, form the 2nd above-mentioned shared ink storeroom, described a plurality of single ink flow paths, above-mentioned a plurality of balancing gate pits and above-mentioned a plurality of nozzle.By the 2nd main body is fixed on the 1st main body, and finish the main body of ink gun.The 1st main body can be a storage unit, and the 2nd main body can be a channel unit.
At this moment, make the main body of ink gun easily.
Ink gun preferably has a plurality of executing agencies.In this case, it is identical with the number of executing agency to be formed on the number of balancing gate pit of ink gun.The balancing gate pit is corresponding one by one with executing agency.Each executing agency relative with pairing balancing gate pit to, and each executing agency changes the ink pressure in the corresponding balancing gate pit.
In this case, above-mentioned a plurality of executing agency is preferably formed as sheet.At this moment, above-mentioned executing agency covers on the above-mentioned main body.Thereby can realize simply each executing agency with its to corresponding 1 balancing gate pit relative to structure.
Ink gun also comprises discharges stream with being stored in the ink that ink in the shared ink storeroom is directed to the main body outside.At this moment, adjuster can be connected on the ink discharge stream.
When adjuster is connected on the ink discharge stream, can constitute this adjuster by the space of airtight air.Preferably extend from the upstream side of junction of two streams to above-mentioned discharge currents road with above-mentioned discharge stream in the space of this airtight air.Even discharge between the stream at the space of airtight air and ink flexible strip be not set, in also can the invading air not airtight space of the ink that in ink is discharged stream, flows.
Preferably also have ink is discharged the dump valve that stream opens and closes.The ink that is present between this dump valve and the shared ink storeroom is discharged the part that stream becomes shared ink storage space, adjuster can be connected on this discharge stream.
Also can discharge at ink and form porosely on the wall of stream, flexible sheet is arranged on the inboard that ink is discharged stream, the periphery of this flexible sheet is with on every side above-mentioned wall engages in above-mentioned hole.Also flexible sheet can be arranged on ink and discharge the outside of stream.Perhaps, discharging stream self also can be made of flexible part.
When utilizing flexible sheet to form adjuster, preferably also comprise the parts that are used for the restrained deformation boundary.Can prevent that the flexible sheet distortion from excessively causing damage.
When utilizing flexible part to form adjuster, this flexible sheet also can be arranged in the main body.
For example, stacked sometimes polylith plate and constitute aforementioned body.At this moment, wherein a plate can be a flexible sheet.
Ink gun has the filter that shared ink storage space is divided into upstream side zone and zone, downstream.
At this moment, adjuster can be connected in the upstream side zone.Perhaps, also adjuster can be connected in the zone, downstream.When adjuster being connected in the zone, downstream, can be further significantly inhibitory action with single ink flow path that this zone, downstream links to each other in ink on pressure variance.
Discharge stream also can with the upstream side regional connectivity.Perhaps, discharge stream also can with the downstream regional connectivity.If discharge stream and upstream side regional connectivity, in the time of then in the ink in foreign matter is sneaked into the upstream side zone, can by before the filter foreign matter be discharged at the ink of sneaking into foreign matter.And, also can clean filter.If discharge stream and downstream regional connectivity, then the foreign matter that arrives nozzle can be discharged.
Description of drawings
Fig. 1 is the stereogram of the ink gun of the 1st embodiment;
Fig. 2 is the cutaway view along the ink gun of the II-II line among Fig. 1;
Fig. 3 is the storage unit of the formation ink gun seen along direction shown in the arrow Y among Fig. 1 and the cutaway view of ink gun main body;
Fig. 4 (a)～(f) is the decomposition plan view of storage unit shown in Figure 3;
Fig. 5 is the vertical view of ink gun main body shown in Figure 1;
Fig. 6 is the enlarged drawing by the line of the single-point among Fig. 5 institute area surrounded;
Fig. 7 is the cutaway view along the VII-VII line among Fig. 6;
Fig. 8 is the exploded perspective view of the part of ink gun main body shown in Figure 1;
Fig. 9 (a) is the amplification view of performance element shown in Figure 1, and Fig. 9 (b) is the vertical view that expression is arranged on the lip-deep single electrode of performance element;
Figure 10 is the providing ink path of expression storage unit shown in Figure 3 and from the skeleton diagram in the path of the ink discharge path of storage unit;
Figure 11 (a) is the longitudinal section of dump valve shown in Figure 10, and Figure 11 (b) is the longitudinal section of spool shown in Figure 10;
Figure 12 is the longitudinal section of the state of the expression spool bottom of inserting dump valve, and Figure 12 (a) expression spool is in the state of discharging disabled position, and Figure 12 (b) expression spool is in the state that allows the position of discharging;
Figure 13 is the skeleton diagram that expression makes the mechanism that spool moves up and down, and Figure 13 (a) expression is corresponding to the state of Figure 12 (a), and Figure 13 (b) expression is corresponding to the state of Figure 12 (b);
Figure 14 (a) and 14 (b) are the longitudinal sections that expression is installed in the 2nd embodiment of the damping flow channel tube on the pipe of discharge usefulness shown in Figure 10;
Figure 15 constitutes the storage unit of ink gun of the 3rd embodiment and the cutaway view of ink gun main body;
Figure 16 (a)～(h) is the decomposition plan view of the storage unit of the 3rd embodiment.
The specific embodiment
Hereinafter the preferred embodiments of the present invention are described with reference to accompanying drawing.As shown in Figure 1, the ink gun 1 of the 1st embodiment is the long shape of directions X.Ink gun 1 begins to have ink gun main body 1a, storage unit 70 and control part 80 successively from the below.Begin in order to describe from upside for the composed component of these ink guns 1.And the expression of 52 among the figure is cover down.The print paper of ink gun 1 on the Y direction by ink gun 1 below.The width of the directions X of paper is shorter than the length of ink gun 1 on directions X.Ink gun 1 can print on the whole width of the directions X of paper simultaneously.Since paper on the Y direction by ink gun 1 below, so ink gun 1 can print the gamut of paper.
Hereinafter see figures.1.and.2 control part 80 is described.Control part 80 comprises 82,4 auxiliary printed circuit boards 81 of 1 main printed circuit board, amounts to 4 driver ICs (driver IC) 84 and amounts to 4 FPC (Flexible Printed Circuit: flexible print circuit) 50.
As shown in Figure 1, main printed circuit board 82 and auxiliary printed circuit board 81 have rectangle plane long on directions X, and uprightly are provided with in parallel to each other.As shown in Figure 2, main printed circuit board 82 is fixed on the upper surface of storage unit 70.Auxiliary printed circuit board 81 keeps being spaced apart and arranged in the both sides of main printed circuit board 82.Side at main printed circuit board 82 is provided with 2 auxiliary printed circuit boards 81.Main printed circuit board 82 and 81 electrical connections mutually of auxiliary printed circuit board by connector.
FPC50 is the parts that form the distribution Butut on the dielectric film of softness, and the upper end of each FPC50 is connected on the corresponding auxiliary printed circuit board 81.On the pars intermedia of each FPC50, fix 1 driver IC 84.The lower end of each FPC50 is connected on each performance element 21 described later.Each driver IC 84 is via radiator 83 and auxiliary printed circuit board 81 thermal bondings (being to have good heat transfer relation between the two).
The control printed circuit board that on not shown ink-jet printer, has upper level.This upper level control printed circuit board is connected by not shown FPC with main printed circuit board 82.The upper level control signal that printed circuit board sent that ink-jet printer is included is passed on 4 driver ICs 84 through 82,4 auxiliary printed circuit boards 81 of main printed circuit board and 4 FPC50.Each driver IC 84 generates the driving signal that is used for corresponding performance element 21.Through FPC50, output on the corresponding performance element 21.4 performance elements 21 are worked according to the control signal of the included upper level control printed circuit board of ink-jet printer.Driver IC 84 work and heating.The heat that driver IC 84 is produced is delivered on the auxiliary printed circuit board 81 by radiator 83, from auxiliary printed circuit board 81 heat radiations.
On ink gun 1, be provided with cover 52 down.Last cover 51 covers the top of this time cover 52.By under cover 52 and last cover 51 Coverage Control portions 80.By these covers 51,52, prevent that the ink that splashes is attached to control part 80 grades when printing on.And in Fig. 1,, omitted last cover 51 in order to see control part 80.
As shown in Figure 2, cover 51 tops, Coverage Control portion 80 on arch.Covering 52 down is roughly four rib tubulars of upper and lower opening, covers the bottom of main printed circuit board 82.By covering down in 52 spaces that cover, FPC50 is lax.Because FPC50 is lax, does not have stress to act on the FPC50.Formed from the outstanding to the inside upper wall 52b of sidewall upper on the top of covering 52 down.The lower end of last cover 51 is arranged on the upper surface of this upper wall 52b.Last cover 51 and following cover 52 have the roughly the same width with ink gun main body 1a.
In the lower end of covering 52 two side (in Fig. 1, only expressing 1 sidewall) down, respectively form 2 outstanding protuberance 52a along its length downwards.As described below with reference to Fig. 4, respectively form 2 recesses 53 along its length in the both sides of storage unit 70.As shown in Figure 2, each protuberance 52a be housed in storage unit 70 corresponding concave part 53 in.FPC 50 is by the gap between protuberance 52a and the recess 53.The front end of protuberance 52a is relative with aftermentioned channel unit 4.Between the front end of protuberance 52a and channel unit 4, formed the gap.Even there is foozle in part, also can utilizes the existence in above-mentioned gap and absorb the caused influence of foozle.Seal this gap by filling silicone resin etc.The side wall lower ends of the following cover 52 except that protuberance 52a is arranged on the upper surface of storage unit 70.
As shown in Figure 2, by the gap between protuberance 52a and the recess 53 near the lower end of derivative FPC50, flatly extend along the upper surface of performance element 21.Be connected near the lower end of FPC50 on the upper surface of performance element 21.As shown in Figure 4, on the upper surface of 4 performance element 21 stuck-at-s channel units 4.1 FPC50 is connected on the upper surface of 1 performance element 21.1 driver IC 84 and 1 auxiliary printed circuit board 81 are connected on 1 FPC50.
Hereinafter storage unit 70 is described with reference to Fig. 2～Fig. 4.And in Fig. 2 and Fig. 3, omitted the section of aftermentioned channel unit 4 and represented.In Fig. 3, for convenience of explanation, the reduce in scale of vertical direction has been carried out amplifying expression.In addition, in Fig. 3, for convenience of explanation, suitably represent this not structure on same section.
Carry out the 6 blocks of plates 71,72,73,74,75 and 76 shown in Fig. 4 (a) and (b), (c), (d), (e), (f) stacked as shown in Figure 3 and formation storage unit 70.
As shown in Figure 3, the thickness of the 1st plate 71 of the superiors is bigger than other plate, and longer slightly than other plate, and the two ends of its length direction are outstanding laterally.Shown in Fig. 4 (a), near an end of the length direction of the 1st plate 71 and near the other end, form circular hole 71a, 71b respectively by etching etc.Circular hole 71a imports ink introducing port in the ink gun 1 with ink, and is as shown in Figure 1, afterwards that providing ink is fixing with joint 91.Circular hole 71b is the ink discharge outlet that is used for discharging from ink gun 1 ink, as shown in Figure 1, afterwards ink is discharged with joint 92 fixing.
Shown in Fig. 4 (b), go up the 2nd several second plates 72 and comprise: the elongate portion 72a that begins to extend sideling from the part corresponding, form tetragonal through hole 72b of almost parallel and formed circular hole 71b extends sideling on the 1st plate 71 elongated hole 72c in the substantial middle position of the 2nd plate 72 with formed circular hole 71a on the 1st plate 71.Through hole 72b forms the ink storeroom of the upstream side that is positioned at aftermentioned filter 73f.
Shown in Fig. 4 (c), the 3rd above-mentioned the 3rd plate 73 has the through hole 73b than the little circle of through hole 72b on the position corresponding with formed through hole 72b on the 2nd plate 72.Periphery top at through hole 73b is formed with step 73a, is provided for removing the filter 73f (with reference to Fig. 3) of dust in the ink etc. on step 73a.Filter 73f is entrenched on the step 73a, has the thickness roughly the same with the height of step 73a simultaneously.The upper surface of filter 73f roughly is on the same plane with the upper surface of the 3rd plate 73.And shown in Fig. 4 (c), on the 3rd plate 73, on the position corresponding, formed circular hole 73c with formed elongated hole 72c on the 2nd plate 72.Circular hole 73c is corresponding with the end of elongated hole 72c, and circular hole 71b is corresponding with the other end of elongated hole 72c.
Shown in Fig. 4 (d), on last the 4th several the 4th plate 74, form through hole 74a by punch process etc.Through hole 74a forms the ink storeroom in the downstream that is positioned at filter 73f.The flat shape of through hole 74a is extended along the crooked also tip of directions X more and more carefully, is point symmetry with respect to its central authorities simultaneously.The through hole 74a that forms downstream ink storeroom comprises along the primary flow path 74b of directions X extension with from primary flow path 74b branch and flow path width 8 the branch stream 74cs narrower than primary flow path 74b.Two stream 74c of branch that extend along same direction constitute a pair of.2 stream 74c of branch that are respectively 2 stream 74c of branch, 2 the stream 74c of branch that extend to the upper left side from the upper left side of primary flow path 74b that extend from side direction lower-left, the lower-left side of primary flow path 74b, 2 stream 74c of branch that extend to the lower right side from the lower right side of primary flow path 74b, extend to the upper right side from the upper right side of primary flow path 74b.Primary flow path 74b extends on the position corresponding with the circular hole 73c of the 3rd plate 73.
As shown in Figure 3, going up the 5th several the 5th plates 75 compares extremely thin with other plate.Shown in Fig. 4 (e), on the 5th plate 75, form 10 elliptical aperture 75a by etching etc.Elliptical aperture 75a be formed on the position corresponding with the length direction two ends of formed primary flow path 74b on the 4th plate and with the corresponding position of the stream 74c of each branch front end on.Near the 5th plate 75Y direction two ends, a side respectively forms 5 elliptical aperture 75a.On the limit of Y direction upside, form 1 elliptical aperture 75a, 2 elliptical aperture 75a, 2 elliptical aperture 75a successively from length direction one side (Fig. 4 (e) left side) beginning.On the limit of Y direction downside, form 1 elliptical aperture 75a, 2 elliptical aperture 75a, 2 elliptical aperture 75a successively from length direction one side (Fig. 4 (e) right side) beginning.Amounting to 10 elliptical aperture 75a all is formed on the position of avoiding otch 53e.10 elliptical aperture 75a are arranged to respect to plate central point symmetry.
Shown in Fig. 4 (f), undermost the 6th plate 76 have corresponding with formed 10 elliptical aperture 75a on the 5th plate 75 10 elliptical aperture 76a and with the 4th plate on the corresponding through hole 76b of formed primary flow path 74b.It is outstanding downwards that the lower surface of the 6th plate 76 forms the peripheral part (part that dotted line surrounded among the figure) that elliptical aperture 76a is only arranged by half erosion method etc., only this ledge is fixed on the upper surface of channel unit 4, separates (with reference to Fig. 2) with channel unit 4 beyond the ledge.
Shown in Fig. 4 (a)～4 (f), in the both sides of the Y of each plate 71～76 direction, with staggered formation rectangular slits 53a, 53b, 53c, 53d, 53e, 53f.Otch 53a, 53b, 53c, 53d, 53e, 53f are formed with 2 in every side, amount to 4 otch.If the aligned in position of plate 71～76 is also stacked, then form the recess 53 (with reference to Fig. 2) that vertically runs through storage unit 70 by these otch 53a～53f.Remove recess 53, the width of the width of storage unit 70 and channel unit 4 is roughly the same.
As shown in Figure 3,6 blocks of plates 71～76 gather into folds in the state lower floor of aligned in position, and interfix.
Then the mobile of ink in the storage unit 70 described.As shown in Figure 3, providing ink is fixed on the position that is communicated with the circular hole 71a of the upper surface of the 1st plate 71 with joint 91.Ink discharged with joint 92 be fixed on the position that is communicated with the circular hole 71b of the upper surface of the 1st plate 71.Above-mentioned joint 91,92 all is the cardinal extremity 91b, the pipe of 92b with the big circle of external diameter, and the opening of cylindrical space 91a, 92a on the lower surface of cardinal extremity 91b, 92b is according to fixing with the opening consistent location relation of each circular hole 71a, the 71b of the 1st plate 71.At first, to describing with the situation (flow direction shown in the blacking arrow Fig. 3) that joint 91 ink supplied flow through in the storage unit 70, describe be discharged to the ink stream (shown in Fig. 3 empty arrow) of discharging from storage unit 70 then with joint 92 from providing ink.
Shown in blacking arrow among Fig. 3, flow into ink in the circular hole 71a by providing ink with the cylindrical space 91a of joint 91, flow into the end of elongate portion 72a, along continuous straight runs moves from here, in the ink storeroom 72b of inflow filter upstream side.Pass through filter 73f, the substantial middle position of the ink storeroom 74a in inflow filter downstream then.Afterwards, mobile to its length direction two ends from the substantial middle of primary flow path 74b shown in the arrow among Fig. 4 (d), the front end to the stream 74c of each branch flows simultaneously.Arrive the length direction two ends of primary flow path 74b and the ink of the stream 74c of each branch front end, flow into amounting to 10 and accommodate in mouthful 5b (with reference to Fig. 5) in the upper surface upper shed of channel unit 4 by elliptical aperture 75a, 76a.
The circular hole 71a of the 1st plate 71 forms the ink introducing port of ink gun 1.The slotted hole 72a of the 2nd plate 72 makes the ink introducing port link to each other with the ink storeroom, and is formed for ink is directed to ink flow path in the ink storeroom.The through hole 72b of the 2nd plate 72 forms the ink storeroom of filter upstream side.The through hole 74a of the 4th plate 74 forms the ink storeroom in filter downstream.
Hereinafter with reference to Fig. 2, Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9,1a describes to the ink gun main body.In addition, for convenience of explanation, in Fig. 6, represent to be positioned at the balancing gate pit that should be represented by dotted lines 10 and the slot 12 of performance element 21 belows with solid line.
As Fig. 2 and shown in Figure 5, ink gun main body 1a comprises channel unit 4 and is fixed on 4 performance elements 21 on the upper surface of channel unit 4.Performance element 21 is selected balancing gate pit 10 arbitrarily formed a plurality of balancing gate pits 10 from the upper surface of channel unit 4, and the ink in the selected balancing gate pit 10 is pressurizeed.
At first flow path unit 4 describes.As shown in Figure 2, channel unit 4 has the width roughly the same with storage unit 70, and as shown in Figure 3, the length of directions X is shorter slightly than the length of storage unit 70.Channel unit 4 has the profile that roughly is rectangular shape.As shown in Figure 5 and Figure 6, on the lower surface of channel unit 4, form the ink ejection zone that a plurality of nozzles 8 is set with rectangular.As shown in Figure 5 and Figure 6, a plurality of balancing gate pits 10 are with on the rectangular upper surface that is arranged on channel unit 4.The number of nozzle 8 equates with the number of balancing gate pit 10.1 nozzle 8 corresponding to 10,1 balancing gate pits 10,1 balancing gate pit corresponding to 1 nozzle 8.
As shown in Figure 7 and Figure 8, channel unit 4 is made of cavity plate 22, substrate 23, slot plate 24, supply plate 25, menifold plate 26,27,28, cover plate 29 and nozzle plate 30 these 9 metallic plates successively from last beginning.These plates 22～30 have at directions X (with reference to Fig. 1) goes up long rectangle plane.
As shown in Figure 5, on cavity plate 22, form 10 through holes that roughly assume diamond in shape that amount to 10 through holes and a plurality of formation balancing gate pit 10 of accommodating mouthful 5b altogether.As shown in Figure 7, on substrate 23, be formed for the hole that each balancing gate pit 10 is communicated with slot 12, the hole that balancing gate pit 10 is communicated with nozzle 8.Though also not shown among Fig. 7, on substrate 23, also formed to make and accommodated the hole that mouthful 5b is communicated with menifold stream 5.The through hole that is used to form the slot 12 that is communicated with each balancing gate pit 10, the hole that balancing gate pit 10 is communicated with nozzle 8 on slot plate 24, have been formed.Though also not shown among Fig. 7, on slot plate 24, also formed to make and accommodated the hole that mouthful 5b is communicated with menifold stream 5.On supply plate 25, the hole that slot 12 is communicated with secondary menifold stream 5a, the hole that balancing gate pit 10 is communicated with nozzle 8 have also been formed.Though also not shown among Fig. 7, on supply plate 25, also formed to make and accommodated the hole that mouthful 5b is communicated with menifold stream 5.On menifold plate 26,27,28, formed and when stacked, interconnected and constitute the through hole of menifold stream 5 and secondary menifold stream 5a and the hole that balancing gate pit 10 is communicated with nozzle 8.On cover plate 29, formed the hole that balancing gate pit 10 is communicated with nozzle 8.A plurality of holes that are used to form nozzle 8 that are communicated with balancing gate pit 10 on nozzle plate 30, have been formed.
As shown in Figure 7,9 plates 22～30 carry out stacked after aligned in position and interfix, so that form the single ink flow path 32 that arrives nozzle 8 from shared menifold stream 5 through slots 12 and balancing gate pit 10 in channel unit 4.1 single ink flow path 32 is corresponding to 1 nozzle 8.Prepare the balancing gate pit 10 identical, the slot 12 identical, the ink flow path 32 identical with the number of nozzle 8 with the number of nozzle 8 with the number of nozzle 8.12,1 ink flow path 32 of 10,1 slot in 1 balancing gate pit is corresponding to 1 nozzle 8.On the upper surface of channel unit 4, expose a plurality of depressions that are used to form balancing gate pit 10.
As shown in Figure 5, channel unit 4 upper surfaces with the amounting on the corresponding position of 10 elliptical aperture 76a (with reference to Fig. 4 (f)) of storage unit 70, be provided with altogether 10 and accommodate a mouthful 5b.In the inside of channel unit 4, formed and accommodated menifold stream 5 that mouthful 5b is communicated with and from the secondary menifold stream 5a of menifold stream 5 branches.Corresponding with each nozzle 8, formed the single ink flow path 32 that arrives nozzle 8 from secondary menifold stream 5a through balancing gate pit 10.Supply to ink in the channel unit 4 through accommodating mouthful 5b from storage unit 70, be branched off into secondary menifold stream 5a from menifold stream 5, slot 12 and balancing gate pit 10 by the performance throttling function arrive nozzle 8.
Can estimate like this, that is, in storage unit 70, be formed with shared upstream side ink storeroom 72b.In storage unit 70, be formed with the 1st shared downstream ink storeroom 74a, in channel unit 4, formed the 2nd shared downstream ink storeroom 5,5a.
Hereinafter will describe performance element 21.As shown in Figure 5, the flat shape of each performance element 21 is trapezoidal.4 performance elements 21 are fixed on the upper surface of channel unit 4.4 performance elements 21 are with staggered setting.Accommodate on the position that mouthful 5b is formed on not with 4 performance elements 21 overlap.4 performance elements 21 are fixed on the position corresponding with formed ink ejection zone on channel unit 4 lower surfaces.As mentioned above, on ink ejection zone, form a plurality of nozzles.On the upper surface of the channel unit 4 corresponding, a plurality of depressions that are used for forming respectively balancing gate pit 10 have been formed with ink ejection zone.As shown in Figure 7,1 depression 10 is corresponding to 1 nozzle 8.1 performance element 21 is crossed over a plurality of depressions 10 and is extended, and covers each depression.By covering described depression, form balancing gate pit 10 by performance element 21.
The parallel opposite side of each performance element 21 is fixed on the direction that the length direction along channel unit 4 extends.The hypotenuse of the performance element 21 of adjacency is separated by small interval each other and is extended in parallel.
As shown in Figure 2, performance element 21 separates with the lower surface of storage unit 70.Corresponding FPC50 is fixed on the upper surface of each performance element 21.FPC50 enters in the gap between performance element 21 and the storage unit 70.
Shown in Fig. 9 (a), performance element 21 is made of 4 piezoelectric patches 41,42,43 and 44, and these piezoelectric patches are made by the lead titanate-zirconate with strong dielectricity (PZT) series ceramic material, and thickness is roughly 15 microns.Piezoelectric patches 41～44 interfixes.
Upper surface at the piezoelectric patches 41 of the superiors forms a plurality of single electrodes 35.Each single electrode 35 is formed on the position corresponding with the depression that forms balancing gate pit 10.
Be formed on the whole sheet surface and thickness is roughly 2 microns common electrode 34, between the piezoelectric patches 42 of the piezoelectric patches 41 of the superiors and downside thereof.Single electrode 35 and common electrode 34 for example are made of metal materials such as Ag-Pd systems.Between piezoelectric patches 42 and 43, between the piezoelectric patches 43 and 44 and the lower surface of piezoelectric patches 44, electrode is not set.
The thickness of single electrode 35 is approximately 1 micron, shown in Fig. 9 (b), has the flat shape that roughly assume diamond in shape similar to balancing gate pit 10.One side of the acute angle part of the single electrode 35 that roughly assumes diamond in shape is stretched out, and is provided with to be electrically connected with single electrode 35 and diameter is roughly the tactile disk 36 of 160 microns circle on its front end.Tactile disk 36 for example is made of the metal that comprises frit.On the position that tactile disk 36 is arranged on not with balancing gate pit 10 overlaps.Tactile disk 36 is electrically connected with contact on being arranged on FPC50 (with reference to Fig. 2).
Common electrode 34 is not shown regional ground connection.Thus, common electrode 34 keeps equal earthing potential in the zone corresponding with all balancing gate pits 10.On the other hand, single electrode 35 is in order to be independent of other single electrode 35 ground control current potential, by be included on each single electrode 35 independently tactile disk 36 and on each single electrode 35 FPC50 of lead independently, be connected to (with reference to Fig. 2) on the driver IC 84.
For example, can on piezoelectric patches 41, form a plurality of single electrodes 35 to high-density by using screen printing technique.Thereby, can be arranged on to high-density with single electrode 35 correspondence positions on the balancing gate pit 10 and the nozzle 8 that form.Can print the image of fine definition.
Hereinafter the driving method to performance element 21 describes.Piezoelectric patches 41 is polarized on its thickness direction, and when applying electric field on the thickness direction when making single electrode 35 be in the current potential different with common electrode 34 to piezoelectric patches 41, then the part of the extra electric field on the piezoelectric patches 41 is out of shape because of piezo-electric effect.When the piezoelectric patches 41 that polarizes on to thickness direction applied the electric field of thickness direction, then piezoelectric patches 41 thickenings planar shrank.On the other hand, remaining 3 piezoelectric patches 42～44th, non-active layer can't spontaneous strain.
That is to say, performance element 21 will be farthest from the balancing gate pit 10 1 piezoelectric patches 41 make active layer, will make non-active layer near 3 piezoelectric patches 42～44 of balancing gate pit 10, promptly so-called single form (ュ ニ モ Le Off) type.Shown in Fig. 9 (a), piezoelectric patches 41～44 is fixed on the upper surface of the cavity plate 22 that forms balancing gate pit 10.Because the extra electric field of piezoelectric patches 41 partly is out of shape, and the piezoelectric patches 42～44 of its below is indeformable, so piezoelectric patches 41～44 integral body are out of shape (single model deformation) projectedly to balancing gate pit's 10 sides.Thereby the volume of balancing gate pit 10 diminishes.The pressure that acts on the ink in the balancing gate pit 10 increases, and ink 10 is extruded towards nozzle 8 from the balancing gate pit, from nozzle 8 ejection inks.
Then, when making single electrode 35 turn back to the current potential identical with common electrode 34, then piezoelectric patches 41～44 becomes original even shape, and the volume of balancing gate pit 10 returns to original volume.Import ink from menifold stream 5 to balancing gate pit 10, ink is stored in the balancing gate pit 10 once more thereupon.
Can select to spray the nozzle of ink by selecting to be used to apply the single electrode 35 of voltage.Can control from the time of nozzle ejection ink by controlling the time that applies voltage to single electrode 35.
Then, with reference to Figure 10, to describing with the discharge system that joint 92 will be stored in the ink discharge in the storage unit 70 to the system of storage unit 70 supply inks and from the ink discharge with joint 91 from providing ink.
At first, the system of subtend storage unit 70 supply inks describes.Have ink tank 101 in the outside of storage unit 70.Ink tank 101 links to each other by pipe 110 with joint 91 with providing ink.Pump 121 is inserted into the centre of pipe 110.When pump 121 rotated, shown in the blacking arrow among Figure 10, ink, supplied in the storage unit 70 through pump 121, pipe 110 and providing ink joint 91 from ink tank 101.
Pump 121 running when arriving providing ink in the storage unit 70 at first.Guarantee bypass flow path in pump 121, even when pump 121 does not turn round, ink also can pass through pump 121.When printing operation usually, pump 121 does not turn round.In case performance element 21 is worked and from channel unit 4 ink sprayed, and then produces negative pressure in channel unit 4, this negative pressure is through storage unit 70 and manage 110, is delivered in the ink tank 101.Utilize this negative pressure with ink sucking-off from ink tank 101,, be drawn in the storage unit 70 through pump 121, bypass flow path and pipe 110.
If long-time the observation then supplies to the quantity of ink of the combination (it is referred to as main body) of storage unit 70 and channel unit 4, the quantity of ink that is sprayed with this main body equates.But, there is ink flowing velocity situation slowly, if from the short time, providing ink amount and ink spray volume not necessarily equate.Both had the time band of quantity delivered, also had the time band of quantity delivered less than spray volume greater than spray volume.These cause pressure oscillation in main body.
Next, the system that discharges ink from storage unit 70 is described.To manage 111 and be connected the ink discharge with on the joint 92.Dump valve 60 is connected the front end of pipe 111.With dump valve 60 in abutting connection be provided with spool 65.Pipe 111 and spool 65 are arranged on the both sides of dump valve 60.By moving up and down of spool 65, the switching of carrying out dump valve 60 is switched.When opening dump valve 60, then allow to discharge ink from storage unit 70 by spool 65.When closing dump valve 60, then forbid discharging ink from storage unit 70 by spool 65.Ink is filled in the pipe 111.Pipe 111 also constitutes the part of ink storage space.When opening dump valve 60 by spool 65, then shown in the blank arrow among Figure 10, the ink in the storage unit 70 is by discharging with joint 92 and pipe 111, and the stream by in dump valve 60 and the spool 65 is discharged in the waste liquid tank 103.
When so-called contrary the cleaning, the inks in the storage unit 70 are discharged.So-called contrary the cleaning is exactly to inject inks or clean and use ink from nozzle 8 pressurizations, and the edge is after the opposite direction of ink flow direction flows through ink during with common printing, discharge from ink gun 1.Carry out contrary the cleaning, the inside of ink gun 1 can be cleaned up.That is to say, can remove being trapped in foreign matters such as the dust of inside of ink gun 1 or bubble.
When implementing contrary the cleaning, cover the bottom (the whole lower surface that is formed with nozzle 8 of channel unit 4 in detail) of ink gun 1 main body 1a by lid 200.Shown in the line of the single-point among Figure 10 arrow, clean with the cleaning in the ink tank 102 and pass through pump 122 and branch valve 123 with ink, be injected in the channel unit 4 of ink gun main body 1a from covering 200 pressurizations.
Inject the cleaning ink in the channel unit 4, along flowing through single ink flow path 32 with arrow rightabout shown in Figure 7.That is to say, from nozzle 8 by balancing gate pit 10, slot 12, secondary menifold stream 5a, menifold stream 5 shown in Figure 5, move to accommodating a mouthful 5b.Cleaning flow in the storage unit 70 from accommodating a mouthful 5b with ink.Flow into the cleaning ink in the storage unit 70, as shown in Figure 3,, arrive downstream ink storeroom 74a through elliptical aperture 76a, elliptical aperture 75a.And, by circular hole 73c, elongated hole 72c, circular hole 71b, arrive ink and discharge, and discharge with joint 92 from the ink discharge with joint 92.At this moment, the ink that is present in channel unit 4 and the storage unit 70 is cleaned with the ink pushing, and discharges with ink with cleaning.Pass through the path shown in Figure 10 empty arrow from ink and cleaning that storage unit 70 is discharged with ink, be discharged in the waste liquid tank 103.
From with the relative circular hole 73c of downstream ink storeroom 74a, ink is filled into elongated hole 72c, circular hole 71b, ink and discharges with joint 92, pipe 111 and dump valve 60, becomes the part of the ink storage space on the ink gun 1.Be also used as ink storage space and ink drain passageway.
Ink when the arrow of the double dot dash line among Figure 10 is represented to clean flows to.The so-called ink of sneaking into foreign matter that will be present in exactly in the nozzle 8 that cleans is forced to discharge, and discharges all right thereby keep from the ink of nozzle 8.When cleaning, have the pressurization that the ink in the ink gun 1 is pressurizeed and clean and the attraction that the ink in the ink gun 1 attracts is cleaned.The ink of discharging from nozzle 8 is housed in and covers in 200, by branch valve 123, is discharged in the waste liquid tank 103 then.In addition, for example use the tape deck that comprises ink gun 1 and when ink tank 101 imports ink gun 1 with ink, or use for a long time and open once more behind this device when using etc., implement cleaning initial.
Then with reference to Figure 11, the structure of dump valve 60 and spool 65 is described.
Shown in Figure 11 (a), dump valve 60 comprises valve body 61 and is entrenched in the lid 62 of valve body 61 bottoms.
Between periphery wall 61b and internal perisporium 61c, formed the air chamber 60y of occluded air.Air chamber 60y is arranged on the annular on every side of stream 60x.The top of the annular space between columnar periphery wall 61b and the internal perisporium 61c forms air chamber 60y by upper wall 61a sealing.
On the periphery of the through hole 62a of lid 62 upper surface, formed the recess that is used to be provided with O type ring 68.On O type ring 68, be provided with ball valve 64.On the upper surface of ball valve 64, be provided with spring 63.Spring 63 is in the stream 60x of valve body 61, and has with the roughly the same outside diameter of cylinder of extension 61d ground and twine, downwards to ball valve 64 application of forces.In Figure 11 (a), by the lower end of ball valve 64 sealing stream 60x.
Air has compressibility, can change volume simply.Increase if be full of the ink pressure of seal cavity, the air that then is full of air chamber 60y shrinks, and makes the volume of filling ink become big.Consequently, can the excessive pressure of inhibitory action on ink raise.Descend if be full of the pressure of the ink of seal cavity, the air that then is full of air chamber 60y expands, and the volume of filling ink is reduced.Consequently, can the excessive pressure of inhibitory action on ink descend.The air that is full of air chamber 60y can reduce the amplitude of fluctuation that acts on the pressure on the ink.It is referred to as damper.
Between air chamber 60y and stream 60x, only there is gap 60z, and is not used for film that air chamber 60y and stream 60x are separated.Even without film, ink can invading air chamber 60y yet, and air can not invaded among the stream 60x yet.Need not to adopt diffusion barrier.But also can adopt diffusion barrier as required.As long as diffusion barrier is a flexible film, can make air chamber 60y obtain the damper effect.
Shown in Figure 11 (b), spool 65 comprises spool main body 66 and inserts the pipe 67 on spool main body 66 tops.
Spool main body 66 has: central authorities have the end wall 66a of circular hole and the pipe 66b that extends from end wall 66a downwards.In end wall 66a and pipe 66b, form roughly cylindrical stream 65x.Pipe 67 is entrenched in the circular hole of central authorities of end wall 66a, in the periphery of the pipe 67 of the upper surface of end wall 66a O type ring 68 is set.Upper end at pipe 67 has formed 2 otch 67a (only expressing 1 among Figure 11 (b)).
Hereinafter the on-off action of the dump valve 60 that utilizes spool 65 and carry out is described with reference to Figure 12.Longitudinal section during Figure 12 dump valve 60 bottoms that to be expression insert Figure 11 with the spool 65 of Figure 11 (b), Figure 12 (a) expression spool 65 is in the state of discharging disabled position, and Figure 12 (b) expression spool 65 is in the state that allows the position of discharging.
Shown in Figure 12 (a), when spool 65 is in when discharging disabled position, the upper end of the pipe 67 of spool 65 is inserted in the through hole 62a of lid 62 of dump valve 60, as yet not with ball valve 64 butts.At this moment, since the lower end of the stream 60x in the dump valve 60 by by spring 63 ball valve 64 sealings of the application of force downwards, so dump valve 60 cuts out.
When carrying out contrary the cleaning, by the following mechanism (with reference to Figure 13) that comprises magnetic valve 130, spool 65 is moved upward, be arranged on the discharge shown in Figure 12 (b) and allow on the position.In its moving process, the upper end of the pipe 67 of spool 65 and ball valve 64 butts, the active force of revolting spring 63 is moved upward ball valve 64.On the position of end wall 66a, spool 65 is stopped by lid 62 butts of O type ring 68 and dump valve 60.
Shown in Figure 12 (b), when spool 65 is in when discharge allowing the position, the upper end formed otch 67a of the stream 60x in the dump valve 60 by pipe 67 and spool 65 interior stream 65x are communicated with.Thus, can carry out above-mentioned contrary the cleaning.
When even ink flows in stream 60x, 65x, ink can invading air chamber 60y yet in.That is to say that even when carrying out contrary the cleaning, air still remains in the air chamber 60y.This is because air chamber 60y is from extending with the gap 60z direction that the ink flow direction in the stream 60x is opposite with contrary the cleaning time that stream 60x is communicated with.
Hereinafter the mechanism that spool 65 is moved up and down is described with reference to Figure 13.Figure 13 (a) is corresponding to Figure 12 (a), and Figure 13 (b) is corresponding to Figure 12 (b).
In the tape deck of ink gun 1, be provided with base station 140 with present embodiment.On base station 140, formed valve support portion 139.Dump valve 60 is fixed on the valve support portion 139.Magnetic valve 130 is fixed on the upper surface of base station 140.Magnetic valve 130 has the slip movable part 130a that an end is fixed with axle 131.
L font arm 132 is supported on the side of base station 140.L font arm 132 is formed with otch 132b in a side of its bend, is formed with otch 132a at the other end.Be provided with axle 133 in otch 132b, L font arm 132 can be that the center swingingly is supported on the base station 140 with axle 133.On the other hand, the axle 131 with magnetic valve 130 is arranged in the otch 132a of the other end.L font arm 132 at one end 132c upward supports spool 65.
When the slip movable part 130a that makes magnetic valve 130 horizontally slips, be accompanied by moving of axle 131, the other end 132a of L font arm 132 also moves.Thereby making L font arm 132 is that swing at the center with axle 133, and the spool 65 that is supported on the other end 132c of L font arm 132 moves up and down.
In Figure 13 (a), spool 65 is in above-mentioned discharge disabled position, this by make slip movable part 130a along direction shown in the arrow towards magnetic valve 130 slides within, L font arm 132 is along the clockwise direction among figure swing, thereby can reach the state shown in Figure 13 (b), be that spool 65 is in the state that above-mentioned discharge allows the position.
In the ink gun 1 of present embodiment, can not supply with and the corresponding quantity of ink of ink spray volume from ink tank 101, the ink volume in the ink gun 1 temporarily reduces.On the contrary, excessive sometimes ink flow in the ink gun 1 from ink tank 101.Thus, act on pressure change on the ink in the ink gun 1.
In the ink gun 1 of present embodiment, if the ink pressure in the ink gun 1 increases, the air that then is full of air chamber 60y shrinks, and the volume of filling ink is increased.Consequently, the excessive pressure of inhibitory action on ink raises.If the ink pressure in the ink gun 1 descends, the air that then is full of air chamber 60y expands, and makes the volume reducing of filling ink.Consequently, the excessive pressure of inhibitory action on ink descends.Owing to have the air chamber 60y that links to each other with ink storage space in the ink gun 1, thus the effectively pressure variation on the ink of stabilization in ink head 1, thus can suppress pressure oscillation.
Because the damping action that can utilize the air chamber 60y that links to each other with the ink storage space to be brought into play, the excessive pressure of inhibitory action on ink rises or excessive descent, so can prevent that ink from oozing out or ink is introduced in the generation of the phenomenon in the nozzle 8 from nozzle 8.Can keep the stable ink spray volume.
The air chamber 60y that is used to obtain damping action is formed on the outside of the main body that channel unit 4 and storage unit 70 are combined.Thereby, can make the designs simplification of main body.Also can in main body, form air chamber 60y.
In the present embodiment, air chamber 60y being connected to ink discharges on the stream.Air chamber 60y also can be connected on the upstream side ink storeroom 72b, can also be connected on the ink storeroom 74a of downstream.Air chamber 60y also can be connected on certain position of secondary menifold 5a from ink introducing port 71a.
In the present embodiment, promptly the 5th plate 75 is extremely thin for the part of the wall of the downstream ink storeroom 74a of delimitation storage unit 70, can deform corresponding to ink gun 1 internal pressure.Shown in Fig. 4 (e), Fig. 4 (f), owing on the 6th plate 76, formed through hole 76b, so the 5th plate 75 can easily be out of shape up and down.The adjuster that the 5th extremely thin plate 75 changes as the volume that allows downstream ink storeroom 74a and playing a role.
In the present embodiment, air chamber 60y is as the 1st adjuster work, and the 5th extremely thin plate 75 is as the 2nd adjuster work.Owing to have 2 adjusters, can suppress the ink gun 1 interior pressure oscillation that is produced effectively.
Under the situation of pipe 111 grades of outside being included in main body, extending,, can form the adjuster of the volume increase and decrease that allows the ink storage space by form pipe 111 or its part by elastomer.
In the present embodiment, because dump valve 60 is set, in the time of for example foreign matters such as being trapped in dust in the ink gun 1 or bubble will being removed, utilizes dump valve 60 that the lower end of stream 60x is opened, thereby can easily the ink in the ink gun 1 be discharged.
Dump valve 60 has ball valve 64 and spring 63, the lower end that ball valve 64 can airtight stream 60x wherein, and 63 pairs of ball valves 64 of spring load downwards.Thus, the structure of dump valve 60 can be simplified, thereby manufacturing cost can be further reduced.
And, be preferably in pump shown in Figure 10 121 and providing ink with between the joint 91 supply valve being set.When carrying out contrary the cleaning under the state of closing this supply valve, then ink flows smoothly.Thereby, can effectively the ink in the ink gun 1 be discharged.
In the present embodiment, discharging stream is communicated with downstream ink storeroom 74a.Since can will be trapped in foreign matter in the ink storeroom 74a of downstream discharge, produce ink discharge failure so can prevent foreign matter from moving in the channel unit 4.
Except this scheme, discharging stream can also be communicated with upstream side ink storeroom 72b.At this moment, cross described filter 73f owing to clean with the ink reverse flow, so can clean to filter 73f.
In the present embodiment, realize the air chamber 60y of damping action and the 5th extremely thin plate 75, the change that is stored in the ink pressure in the ink storeroom 74a of downstream is suppressed.Before and after the filter 73f, because of the big flow path resistance of filter 73f causes the pressure loss, the pressure before and after the filter 73f is inconsistent.If the ink pressure of the downstream ink storeroom 74a of filter 73f is changed steadily, then the pressure of single ink flow path is more steady.In addition, make the pressure oscillation of upstream side ink storeroom 72b of filter 73f steady, also can make the pressure of single ink flow path steady.
Hereinafter the 2nd embodiment is described.The ink gun of present embodiment is that damping flow channel tube 160 shown in Figure 14 is installed on the discharge pipe shown in Figure 10 111.Others are identical with the 1st embodiment.Thereby hereinafter only damping flow channel tube 160 is described.In addition, in this case, dump valve 60 also can not have air chamber 60y.
Shown in Figure 14 (a), damping flow channel tube 160 comprises tube body 161 and is installed in the damping membrane 162 that is made of flexible thin film's material on the tube body 161.
Be installed on the inner surface of perisporium 161b, between the ink and atmosphere in stream 160 damping membrane 162 coverage hole 161z.Specifically, damping membrane 162 has the circular flat than the big circle of hole 161z, and only its periphery 162a circle is fixed on the perisporium 161b with living in hole 161z.
Damping membrane 162 is when carrying out above-mentioned contrary the cleaning, and shown in Figure 14 (a), the part outside the periphery 162a is interior side-prominent to stream 160x's, at this moment forms 2 protuberances.At this moment, be full of ink in the stream 160x, in ink gun 1, can not produce excessive negative pressure.On the other hand, in case produce negative pressure in ink gun 1, then the interior side-prominent part to stream 160x on the damping membrane 162 is further stretched to the inside, shown in Figure 14 (b), deforms with forming 1 protuberance.
As mentioned above, if adopt the ink gun of present embodiment, even then be accompanied by the ejection ink, ink volume reducing in the ink gun, damping membrane 162 also can be out of shape corresponding to the pressure in the ink gun 1, so with above-mentioned the 1st embodiment in the same manner, can reach the effect that suppresses the pressure oscillation that is produced in the shower nozzle 1 and stably spray ink.
And, owing to damping membrane 162 is not to be installed on the outer surface of perisporium 161b to be mounted on the inner surface of perisporium 161b, so can realize the densification of damper tube 160.And, deforming even be accompanied by the pressure oscillation in the ink gun 1, damping membrane 162 is also still stayed in the stream 160x, so can alleviate the breakage of the damping membrane 162 that is made of thin-film material.Perisporium 161b brings into play function as the limiter of the distortion boundary that is used to limit damping membrane 162.
Damping membrane 162 also can be fixed on the outer surface of perisporium 161b.
Hereinafter the 3rd embodiment is described with reference to Figure 15 and Figure 16.The ink gun of present embodiment only is that with the difference of the 1st embodiment the structure of storage unit 170 is different.Others are identical with the 1st embodiment.Hereinafter only the structure of storage unit 170 is described.At this moment, dump valve 60 also can not have air chamber 60y.And for convenience of explanation, the ratio to vertical direction in Figure 15 is amplified, and suitably represents this not ink flow path on same section.
Shown in Figure 16 (a) and (b), (c), (d), (e), (f), (g), (h), storage unit 170 is the laminated body that are made of 171,173,174,175,176,177,178 and 1 damping fins of 7 plates 172 with rectangle plane of (with reference to Fig. 1) length on directions X.
Shown in Figure 15 and Figure 16 (a), the 1st plate 171 of the superiors has formed circular hole 171a near length direction one end of the 1st plate 171, formed circular hole 171b near the other end.Circular hole 171a is positioned at from the position of the mediad below off-centre of the Y direction of the 1st plate 171, and circular hole 171b is positioned at from the position of the mediad top off-centre of the Y direction of the 1st plate 171.And, on the lower surface (faces of damping fin 172 1 sides) of the 1st plate 171, be formed on the oval-shaped recess 171c that extends more longways on the directions X.Recess 171c is between the directions X center and circular hole 171b of the 1st plate 171.And, formed circular hole 171d in the bottom center of recess 171c.That is to say, formed oval-shaped recess 171c, formed the circular hole 171d of the upper surface of the bottom that connects this recess 171c and the 1st plate 171 in the lower face side of the 1st plate 171.
Going up several second damping fins 172 is made of flexible thin film's material.Shown in Figure 15 and Figure 16 (b), on the position corresponding, circular hole 172a, 172b have been formed with formed circular hole 171a, 171b on the 1st plate 171.And, as flexible thin film's material,, can adopt metal or resin as long as adopt the film that deflection takes place easily corresponding to the pressure oscillation in the ink.In the present embodiment, use the choke film attached to the resin system composite membrane on the good PET of script gas barrier property (PET) resin.Thereby, can suppress air and steam sees through by the flexible thin film.Flexible owing to having, so also can bring into play good function as the damper that suppresses the ink pressure change.
Shown in Figure 15 and Figure 16 (c), go up the 3rd several the 3rd plates 173 and on the position corresponding, formed circular hole 173a, 173b with connecting with formed circular hole 171a, 171b on the 1st plate 171, and perforation formed with the 1st plate 171 on the corresponding elliptical hole 173c of formed oval-shaped recess 171c.
Shown in Figure 15 and Figure 16 (d), go up elongate portion 174a, 174b that the 4th several the 4th plates 174 has formed the concavity that extends sideling towards the central authorities of the Y direction of the 4th plate 174 from the position corresponding with formed circular hole 171a, 171b on the 1st plate 171.And, on the upper surface (faces of the 3rd plate 173 1 sides) of the 4th plate 174, form the elliptical aperture 174c that is communicated with and extends to the central authorities of the 4th plate 174 with elongate portion 174a, be communicated with and extended to the elliptical aperture 174f of the central authorities of the 4th plate 174 with elongate portion 174b.At this moment, elliptical aperture 174f forms concavity, has elliptical aperture 173c outer shape and the size much at one with the 3rd plate 173, and to the 3rd plate 173 1 side openings.And, near the central authorities of the 4th plate 174, formed damper connected entrance 174h.Elliptical aperture 174c and elliptical aperture 174f are interconnected by connected entrance 174h.On the other hand, the bottom center at elliptical aperture 174c has formed the elliptical aperture 174d that encloses than elliptical aperture 174c little.And, formed through hole 174e in the bottom center of elliptical aperture 174d than the little circle of elliptical aperture 174d.With step that the periphery of through hole 174e upper end links to each other on be provided for removing the filter 174g of dust in the ink etc.At this, elongate portion 174a, elliptical aperture 174c and elliptical aperture 174d form the ink storeroom 181a of filter 174g upstream side.In addition, elliptical aperture 174f, elongate portion 174b form dampening chamber 182.So-called dampening chamber 182 is meant and allows the volume increase and decrease and performance makes the pressure that acts on the ink change the chamber of function stably.
Shown in Figure 15 and Figure 16 (e), formed circular hole 175a in the central authorities of last several the 5th the 5th plate 175.In addition, the 5th plate 175 is layered on the 4th plate 174 from the below, makes circular hole 175a be communicated with the through hole 174e of the 4th plate 174.And circular hole 175a is relative with the center side acute angle part of the 4th plate 174 of through hole 174e.
Shown in Figure 15 and Figure 16 (f), go up the 6th several the 6th plates 176 and be formed with through hole 176a.The flat shape of through hole 176a is extended along directions X bending and front end more and more carefully, is point symmetry with respect to its central authorities simultaneously.The through hole 176a that forms downstream ink storeroom comprises along the primary flow path 176b of directions X extension with from primary flow path 176b branch and flow path width 8 the branch stream 176cs narrower than primary flow path 176b.2 stream 176c of branch that extend along same direction constitute a pair of.Be respectively: 2 stream 176c of branch, 2 the stream 176c of branch that extend to the upper left side from primary flow path 176b upper left side that extend from side direction lower-left, primary flow path 176b lower-left side, 2 stream 176c of branch that extend to the lower right side from primary flow path 176b lower right side, 2 stream 176c of branch that extend to the upper right side from primary flow path 176b upper right side.
As shown in figure 15, going up the 7th several the 7th plates 177 compares extremely thin with other plate.Shown in Figure 16 (g), on the 7th plate 177, form 10 elliptical aperture 177a altogether by etching etc.Elliptical aperture 177a be formed on the position corresponding with the two ends of length direction of formed primary flow path 176b on the 6th plate 176 and with the corresponding position of the front end of the stream 176c of each branch on.Near the Y direction two ends of the 7th plate 177, every side forms 5 elliptical aperture 177a.On the limit of the upside of Y direction, form 1 elliptical aperture 177a, 2 elliptical aperture 177a, 2 elliptical aperture 177a successively from length direction one side (Figure 16 (g) left side) beginning.On the limit of the downside of Y direction, form 1 elliptical aperture 177a, 2 elliptical aperture 177a, 2 elliptical aperture 177a successively from length direction one side (Figure 16 (g) right side) beginning.Totally 10 elliptical aperture 177a are formed on the position of avoiding otch 531.Totally 10 elliptical aperture 177a are arranged to be point symmetry with respect to plate central authorities.
Shown in Figure 16 (h), undermost the 8th plate 178 comprises 10 elliptical aperture 178as and with the primary flow path 176b of the 6th plate 176 corresponding through hole 178b corresponding with formed 10 elliptical aperture 177a on the 7th plate 177.The lower surface of the 8th plate 178 only has the peripheral part (part that dotted line surrounds among the figure) of elliptical aperture 178a outstanding downwards by formation such as half erosion methods, only this ledge is fixed on the upper surface of channel unit 4, separates (with reference to Fig. 2) with channel unit 4 outside the ledge.
171,173～178 and 1 damping fins 172 of these 7 plates aligned in position as shown in figure 15 are afterwards stacked, and interfix.And, shown in Figure 16 (a)～(h), at the two ends of the Y direction of each plate 171,173～178, with staggered alongst respectively form 2, amount to the otch 53g～53m of 4 rectangles.By the position of plate 171,173～178 and damping fin 172 is aligning the upper and lower stacked mutually, and constitute the recess 53 (with reference to Fig. 2) that vertically connects storage unit 70 by these otch 53g～53m.Except recess 53, the width of the width of storage unit 70 and channel unit 4 is roughly the same.
As shown in figure 15, providing ink is fixed on the upper surface of the 1st plate 171 corresponding with circular hole 171a with joint 91.The ink discharge is fixed on the upper surface of the 1st plate 71 corresponding with circular hole 171b with joint 92.Joint the 91, the 92nd has the cardinal extremity 91b of the big circle of external diameter, the pipe of 92b, and the opening of cylindrical space 91a of being arranged to cardinal extremity 91b lower surface is consistent with the circular hole 171a of the 1st plate 171, and the opening of the cylindrical space 92a of cardinal extremity 92b lower surface is consistent with the circular hole 171b of the 1st plate 171.
Hereinafter the mobile of ink in the storage unit 170 describe when supplying with ink.At first, the situation from providing ink flows through storage unit 170 with joint 91 ink supplied in (Figure 15 shown in the blacking arrow) is described.
Shown in blacking arrow among Figure 15, flow into ink in the circular hole 171a by providing ink with the cylindrical space 91a of joint 91, flow into upstream side ink storeroom 181a by circular hole 172a and 173a.Upstream side ink storeroom 181a is formed by formed slotted eye 174c on the 4th plate 174.The ink that flows in the upstream side ink storeroom 181a passes through filter 73f, flows into downstream ink storeroom 181b.Downstream ink storeroom 181b is formed by formed slotted eye 174e on the 4th plate 174.Flow into the ink in the ink storeroom 181b of downstream,, flow in the primary flow path 176b substantial middle of the 6th plate 176 by the circular hole 175a of the 5th plate.Then, shown in the arrow of Figure 16 (f), ink flows towards the length direction two ends from the substantial middle of primary flow path 176b, and flows towards the front end of each difference stream 176c.Arrive the length direction two ends of primary flow path 176b and the ink of each difference stream 176c front end, by elliptical aperture 177a, 178a, accommodate (with reference to the Fig. 5) in mouthful 5b that flows in the upper surface open of channel unit 4.
Flow into the ink in the upstream side ink storeroom 181a,, flow in the dampening chamber 182 by damper connected entrance 174h.Dampening chamber 182 is made of formed elliptical aperture 174f on formed elliptical aperture 173c on the 3rd plate 173 and the 4th plate 174.When ink imports the initial stage, be discharged to outside from the ink discharge with joint 92 by the ink that will flow in the dampening chamber 182, the bubbles that are present in upstream side ink storeroom 181a and the dampening chamber 182 can be discharged.That is to say that ink can be full of filter 174g upstream side space not existing under the bubble state.
Ink temporarily is stored in upstream side ink storeroom 181a and the downstream ink storeroom 181b.
Describe from flow (shown in Figure 15 empty arrow) of ink discharge during hereinafter to contrary the cleaning with the ink of joint 92 discharges.
When contrary the cleaning, cleaning flows in the storage unit 170 by accommodating a mouthful 5b with ink.Flow into the cleaning ink in the storage unit 170, arrive downstream ink storeroom 181b, flow in the upstream side ink storeroom 181a through filter 174g through elliptical aperture 178a, 177a.The cleaning that flows in the upstream side ink storeroom 181a uses ink shown in figure empty arrow, and process dampening chamber 182 and circular hole 173b, 172b, 171b discharge with joint 92 from the ink discharge.Be present in the ink in channel unit 4 and the storage unit 170 this moment, be discharged from ink by cleaning with the ink pushing and with cleaning.At this moment, because the foreign matter that filter 174g is caught also is discharged from,, recover the performance of filter simultaneously so can purify stream.
At this, the wall that is used to delimit dampening chamber 182 is formed by damping fin 172.And clamping damping fin 172 on oval-shaped recess 171c and the 1st plate and the zone relative with elliptical aperture 173c are relatively.The space of being delimited by recess 171c and damping fin 172 is communicated with atmosphere by circular hole 171d.That is to say, between the ink and atmosphere of damping fin 172 in dampening chamber 182.Damping fin 172 can also can be out of shape in elliptical aperture 173c one side in the distortion of recess 171c one side.Can make the volume increase and decrease of dampening chamber 182 by the distortion of damping fin 172.
The excessive displacement of the bottom restriction damping fin 172 of recess 171c.That is to say that the 1st plate 171 is the limiting parts that are used to limit damping fin 172 displacements.And this limiting part not only limits the displacement of damping fin 172, but also prevents that damaging relevant external force with damping fin 172 is applied directly on the damping fin 172.Thereby, carry out the operation of ink gun 1 easily, and help to prolong its life-span.
As mentioned above, according to the ink gun of present embodiment, owing to damping fin 172 deforms corresponding to the pressure in the ink gun 1, with above-mentioned the 1st embodiment in the same manner, can suppress the pressure oscillation that is produced in the ink gun 1.Owing to act on the pressure stability on the ink, so can spray the ink of stable quantity.
If be provided with air chamber 60y in advance on air bleeding valve 60, then it brings into play function as the 2nd volume governor.Owing to the vibrational energy of the absorption of air pressure that utilizes air chamber 60y to be kept, so can more effectively suppress the ink gun 1 interior pressure oscillation that is produced.In the present embodiment, the primary flow path 176b of downstream ink storeroom 181b is relative with atmosphere by compare the 7th extremely thin plate 177 with other plate.The 7th extremely thin plate 177 is brought into play function as the 3rd volume governor, can realize making the pressure oscillation that ink is produced in the ink storeroom 181b of downstream to subtract the damper effect that declines.The damping fin 172 of dampening chamber 182, the air chamber 60y of air bleeding valve 60 and the 177 common pressure oscillations that ink produced that suppress to be present in channel unit 4 upstream sides of the 7th plate.Thereby, can be controlled at the degree that does not influence ink ejection characteristic reliably with transmitting to the pressure oscillation of channel unit 4 sides.And, so need not to comprise the composed component of above-mentioned inhibition pressure oscillation, can adopt one or it is made up.
Because stacked damping fin 172 gets final product, so the installation of damping fin 172 is very easy to.Because the excessive displacement of the 1st plate 171 restriction damping fins 172 is so can prevent the breakage of damping fin 172.Because damping fin 172 is arranged in the storage unit 170, so can realize the densification of ink gun 1.And, owing to dampening chamber is arranged near the providing ink stream, so can more effectively suppress the ink gun 1 interior pressure oscillation that is produced.Because ink supply port 171a and damping connected entrance 174h are connected on the upstream side ink storeroom 181a, so when upstream side ink storeroom 181a supplied with ink from ink supply port 171a, ink also can be discharged flow path to ink from damping connected entrance 174h.Can discharge by the foreign matter that the upstream side ink storeroom 181a that be trapped in filter 174g is interior thus, and prevent the reduction of filter effect.In addition, owing to there is filter 174g, so discharge the stream adverse current even comprise the ink of foreign matter in upstream side ink storeroom 181a from ink, foreign matter can not invade in the ink storeroom 181b of downstream yet.
Though preferred embodiments of the present invention have been disclosed for illustrative above, the present invention is not limited to the foregoing description, can carry out various changes in the scope of technical solution of the present invention.
In the above-described embodiments, though assemble again after channel unit 4, storage unit 70 and 170 independent the manufacturings, be not limited thereto.Also can use channel unit 4, storage unit 70 and 170 incorporate main parts.
In the present embodiment, though it is extremely thin to be formed for delimiting the 5th plate the 75, the 7th plate 177 of wall of downstream ink storeroom 74a, 181b, and can deform, but can on the part of the wall that is used to delimit the ink storeroom, not form this film corresponding to the pressure in the ink gun 1 yet.
The filter 73f, the 174g that the ink storeroom are divided into upstream side zone and zone, downstream also can be set.
In the 1st embodiment,, also the stream that connects ink storage space and air chamber can be separated setting with the discharge stream though be provided with air chamber in the centre of discharging stream.
On the damping flow channel tube 160 of the 2nd embodiment,, also can fix on the outer surface though damping membrane 162 is fixed on the inner surface of perisporium 161b.And, also can for example manage and form the hole on 111, and damping membrane 162 is installed on the position that covers this hole in the part of damping stream.On the damping flow channel tube 160 of the 2nd embodiment,, also can on the inner surface of perisporium 161b, form a plurality of hole 161z from damping membrane 162 being protected and improved the viewpoint of damping.In general, though can improve damping, under the situation that 1 hole 161z is only arranged, when hole 161z is blocked, then can not reach the raising of desirable damping by the size that increases damping membrane 162.And when the size that increases damping membrane 162 and when increasing the size of damping membrane 162, impaired easily by the damping membrane 162 that thin-film material is formed.For fear of producing this problem, be preferably on the inner surface of perisporium 161b and form a plurality of hole 161z.In addition, can also prevent the structural strength decline of damping flow channel tube 160 like this.
In the 3rd embodiment, though the 1st plate 171 is the limiting parts that are used to limit the displacement of damping fin 172, the 1st plate 171 also can form not the structure that the displacement to damping fin 172 limits.In the case, preferably formation prevents from directly to apply the limiting part of the external force that causes damping fin 172 breakages, or manages in advance this external force and damping fin 172 are isolated.Be installed in the upward cover 51 of storage unit 170 upper surface side and cover 52 down and can prevent that external force from acting on the damping fin 172.
In the 3rd embodiment,, also damping fin can be installed on the medial surface of dampening chamber 182 though damping fin 172 is installed on the lateral surface of dampening chamber 182.And in the 3rd embodiment, the step that filter 174g is set also can form the degree of depth that is equivalent to filter 174g thickness from the bottom of elliptical aperture 174d.Thus, because ink can not be trapped on the filter 174g, foreign matter and bubble are discharged rapidly.And this moment, be discharged to the outside less discharge that can finish foreign matter and bubble of quantity of ink.Through hole 76b of the foregoing description (the 6th plate 176) and through hole 178b (the 8th plate 178) also can not connect each plate 176,178.That is, also can form the recess that has the bottom respectively.Thus, compare the 5th extremely thin plate 75 and the 7th plate 177 and extraneous air isolation with other plate.Even the 5th extremely thin plate 75 and the 7th plate 177 can prevent that also ink from leaking from main part just in case break.
Ink gun of the present invention goes for any ink-jet printer of line and string type, and is not limited to ink-jet printer, also goes for ink jet type facsimile machine or duplicator.
Claims (24)
1. ink gun comprises:
Main body;
Be formed on the shared ink storeroom of the inside of described main body;
Be formed on the inside of described main body, and will be directed to shared ink flow path in the described shared ink storeroom from the outside institute of described main body ink supplied;
Be formed on a plurality of nozzles on the 1st of described main body dispersedly;
Be formed on a plurality of balancing gate pits on the described main body, the number of described balancing gate pit is identical with described nozzle number;
Be formed on a plurality of single ink flow path of described body interior, each single ink flow path arrives described 1 nozzle from described shared ink storeroom via described 1 balancing gate pit;
Allow the adjuster of the volume increase and decrease of the filling ink in the shared ink storage space, wherein said shared ink storage space comprises described shared ink storeroom and described shared ink flow path;
Wherein, described adjuster is the space of airtight air, and the ink in this air and the described shared ink storage space contacts, and, filling described airtight air and ink in the described shared ink storage space.
2. ink gun as claimed in claim 1, the space of described airtight air are arranged on the top of the junction of two streams of himself and described shared ink storage space.
3. ink gun as claimed in claim 2, extend from the upstream side of the flow direction of the ink of described junction of two streams in described shared ink storage space in the space of described airtight air.
4. ink gun as claimed in claim 1, described main body have the 1st main body and the 2nd main body that is fixed on the 1st main body;
On described the 1st main body, form described shared ink flow path and the 1st described shared ink storeroom;
On described the 2nd main body, form the 2nd described shared ink storeroom, described a plurality of single ink flow paths, described a plurality of balancing gate pits and described a plurality of nozzle.
5. ink gun as claimed in claim 4 wherein also has a plurality of executing agencies,
Each executing agency relative with described each balancing gate pit respectively to, and each executing agency changes the pressure of pairing balancing gate pit,
Described a plurality of balancing gate pit is formed on the 2nd of described main body,
Described a plurality of executing agency forms the actuator unit of sheet;
Described actuator unit covers on described the 2nd.
6. ink gun as claimed in claim 1 wherein also has ink and discharges stream, and this ink is discharged stream will be stored in the outside that the interior ink of described shared ink storeroom is directed to described main body;
Described ink is discharged the part that stream constitutes described shared ink storage space,
Described adjuster is connected to described ink and discharges on the stream.
7. ink gun as claimed in claim 6, the space of described airtight air are connected on the described discharge stream, and extend to the upstream side of described discharge stream from the junction of two streams of himself and described discharge stream in the space of sealing air.
8. ink gun as claimed in claim 6 also has described ink is discharged the dump valve that stream opens and closes.
9. ink gun as claimed in claim 1 wherein also has filter, and this filter is divided into upstream side zone and zone, downstream with described shared ink storage space,
Described adjuster is connected with described upstream side zone.
10. ink gun as claimed in claim 1 wherein also has filter, and this filter is divided into upstream side zone and zone, downstream with described shared ink storage space,
Described adjuster is connected with zone, described downstream.
11. ink gun as claimed in claim 6 wherein also has filter, this filter is divided into upstream side zone and zone, downstream with described shared ink storage space,
Described discharge stream is connected with described upstream side zone.
12. ink gun as claimed in claim 6 wherein also has filter, this filter is divided into upstream side zone and zone, downstream with described shared ink storage space,
Described discharge stream is connected with zone, described downstream.
13. an ink gun comprises:
Main body;
Be formed on the shared ink storeroom of the inside of described main body;
Be formed on the inside of described main body, and will be directed to shared ink flow path in the described shared ink storeroom from the outside institute of described main body ink supplied;
Be formed on a plurality of nozzles on the 1st of described main body dispersedly;
Be formed on a plurality of balancing gate pits on the described main body, the number of described balancing gate pit is identical with described nozzle number;
Be formed on a plurality of single ink flow path of described body interior, each single ink flow path arrives described 1 nozzle from described shared ink storeroom via described 1 balancing gate pit;
Allow the adjuster of the volume increase and decrease of the filling ink in the shared ink storage space, wherein said shared ink storage space comprises described shared ink storeroom and described shared ink flow path, and is filling ink in the shared ink storage space;
Wherein, described adjuster is with described shared ink storage space and the isolated flexible sheet of atmosphere.
14. ink gun as claimed in claim 13, wherein also have ink and discharge stream, this ink is discharged stream will be stored in the outside that the interior ink of described shared ink storeroom is directed to described main body, and this ink is discharged the part that stream constitutes described shared ink storage space
On the wall of described ink discharge stream, form porose;
The inboard of discharging stream at described ink is provided with flexible sheet;
The periphery of this flexible sheet closely contacts with the wall that the described ink around the described hole is discharged stream.
15. ink gun as claimed in claim 13, wherein also have ink and discharge stream, this ink is discharged stream will be stored in the outside that the interior ink of described shared ink storeroom is directed to described main body, and this ink is discharged the part that stream constitutes described shared ink storage space
On the wall of described ink discharge stream, form porose;
The arranged outside of discharging stream at described ink has flexible sheet;
The periphery of this flexible sheet closely contacts with the wall that the described ink around the described hole is discharged stream.
16. ink gun as claimed in claim 13, wherein also have ink and discharge stream, this ink is discharged stream will be stored in the outside that the interior ink of described shared ink storeroom is directed to described main body, and this ink is discharged the part that stream constitutes described shared ink storage space
And the wall that described ink is discharged stream is formed by flexible material.
17. ink gun as claimed in claim 13, described flexible sheet is arranged on the inside of described main body.
18. ink gun as claimed in claim 17 is folded and constitute described main body with the polylith flaggy;
Wherein a plate is a flexible sheet.
19. ink gun as claimed in claim 13 wherein also has limiting part, this limiting part limits the deformation limit amount of described flexible sheet.
20. ink gun as claimed in claim 13 has the filter that described shared ink storage space is divided into upstream side zone and zone, downstream;
Described adjuster is connected on the described upstream side zone.
21. ink gun as claimed in claim 13 has the filter that described shared ink storage space is divided into upstream side zone and zone, downstream;
Described adjuster is connected on the zone, described downstream.
22. ink gun as claimed in claim 13, described main body have the 1st main body and the 2nd main body that is fixed on the 1st main body;
On described the 1st main body, form described shared ink flow path and the 1st described shared ink storeroom;
On described the 2nd main body, form the 2nd described shared ink storeroom, described a plurality of single ink flow paths, described a plurality of balancing gate pits and described a plurality of nozzle.
23. ink gun as claimed in claim 22 wherein also has a plurality of executing agencies,
Each executing agency relative with described each balancing gate pit respectively to, and each executing agency changes the pressure of pairing balancing gate pit,
Described a plurality of balancing gate pit is formed on the 2nd of described main body,
Described a plurality of executing agency forms the actuator unit of sheet;
Described actuator unit covers on described the 2nd.
24. ink gun as claimed in claim 23 wherein also has described ink is discharged the dump valve that stream opens and closes.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004332665 | 2004-11-17 | ||
| JP2004332665 | 2004-11-17 | ||
| JP2005037351 | 2005-02-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1775529A true CN1775529A (en) | 2006-05-24 |
| CN100515773C CN100515773C (en) | 2009-07-22 |
Family
ID=36765303
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101253361A Active CN100515773C (en) | 2004-11-17 | 2005-11-16 | Ink jet head |
| CN 200520143007 Expired - Lifetime CN2875808Y (en) | 2004-11-17 | 2005-11-17 | Ink jet head |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520143007 Expired - Lifetime CN2875808Y (en) | 2004-11-17 | 2005-11-17 | Ink jet head |
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| Country | Link |
|---|---|
| CN (2) | CN100515773C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927607A (en) * | 2009-06-22 | 2010-12-29 | 兄弟工业株式会社 | Liquid injection device |
| CN102343715A (en) * | 2010-07-30 | 2012-02-08 | 兄弟工业株式会社 | Liquid ejection apparatus |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190092479A (en) * | 2017-01-17 | 2019-08-07 | 니혼 덴산 가부시키가이샤 | Dispensing head and dispensing device |
| CN113928014B (en) | 2020-07-14 | 2023-08-22 | 佳能株式会社 | Liquid supply member and liquid discharge head |
-
2005
- 2005-11-16 CN CNB2005101253361A patent/CN100515773C/en active Active
- 2005-11-17 CN CN 200520143007 patent/CN2875808Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927607A (en) * | 2009-06-22 | 2010-12-29 | 兄弟工业株式会社 | Liquid injection device |
| CN101927607B (en) * | 2009-06-22 | 2012-12-05 | 兄弟工业株式会社 | Liquid ejecting apparatus |
| CN102343715A (en) * | 2010-07-30 | 2012-02-08 | 兄弟工业株式会社 | Liquid ejection apparatus |
| US8672461B2 (en) | 2010-07-30 | 2014-03-18 | Brother Kogyo Kabushiki Kaisha | Liquid ejection apparatus |
| CN102343715B (en) * | 2010-07-30 | 2015-01-28 | 兄弟工业株式会社 | Liquid ejection apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100515773C (en) | 2009-07-22 |
| CN2875808Y (en) | 2007-03-07 |
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