CN1832860A - Liquid injector - Google Patents
Liquid injector Download PDFInfo
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- CN1832860A CN1832860A CN 02805682 CN02805682A CN1832860A CN 1832860 A CN1832860 A CN 1832860A CN 02805682 CN02805682 CN 02805682 CN 02805682 A CN02805682 A CN 02805682A CN 1832860 A CN1832860 A CN 1832860A
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Abstract
Provided is a liquid injecting apparatus equipped with a liquid injecting head, which is mounted on a carriage and moved reciprocally in a widthwise direction of a target, and a valve unit, which is mounted on the carriage to be supplied with liquid via a supply passage from a liquid retainer and to supply liquid to the liquid injecting head. The valve unit has a pressure chamber connected to the liquid retainer via the supply passage; a valve, which opens or closes the supply passage to supply liquid to the pressure chamber; and a flexible film member, which is displaced based on a negative pressure generated as liquid in the pressure chamber decreases to thereby operate the valve.
Description
Technical field
The present invention relates to a kind of liquid injection device, the valve unit of Shi Yonging, and the method for making this valve unit therein.
Background technology
As a kind of equipment that sprays small amount of liquid on target, the inkjet type printer prints by spraying a large amount of ink droplets usually.Such printer comprises a record head, has wherein formed the nozzle that has minimum opening portion in a large number, and printer is discharged ink droplet from the opening portion of each nozzle.Such recording equipment is mainly for household use, and wherein most make is: be used for can being detachably connected to the balladeur train that record head is installed to each print cartridge of record head supply ink.
In this so-called " on balladeur train " type printer, when carrying out a large amount of relatively printings, can't avoid often changing print cartridge.Therefore this needs manually when changing print cartridge, thereby has increased operating cost.Therefore, commercial printer has been used a kind of structure (" disengaging balladeur train " type), and wherein, jumbo print cartridge quilt and balladeur train are placed apart, and ink is fed to the record head that is installed on the balladeur train from print cartridge by flexible pipe.
In such disengaging balladeur train type structure, the extended distance of ink supply pipe is along with the increase of printer size (antiquarian) becomes big, therefore improved from print cartridge to extend to dynamic pressure (pressure loss) the ink supply pipe of balladeur train.So be necessary to use independent ink supply pipe with big internal diameter.Bigger ink supply pipe diameter has increased the flexing resistance of each pipeline.In order to overcome the increase of flexing resistance, for example, need further to increase the driving force of balladeur train.This has increased the size of recording equipment.
In this respect, the applicant has proposed a kind of structure of ink supercharging supply system, and this system gives ink packaging body supercharging in the print cartridge with air, and ink feed to each son jar that is installed on the balladeur train, to eliminate the influence of dynamic pressure in the pipeline.(for example, the early stage publication of No.2001-199080 Japan).
According to the recording equipment that uses this supercharging supply system, ink always is fed to each son jar from each print cartridge under the pressurized air effect, thereby has always stored the ink of constant scope in the son jar.This can guarantee to write down stable ink droplet discharging operation on first watch.
Because the ink that pressurized air is presented from each print cartridge is stored in each son jar like this, so that reached predetermined liquid level, should level detection mechanism be set at each son jar.Under the situation of using such level detection mechanism, must improve the structural reliability of level detection mechanism.This has increased cost inevitably.In addition, for environment for use and the improper behaviour in service of tackling recording equipment, for example vibration, it is complicated that control system becomes, and this mechanism becomes big inevitably.
The early stage publication of No.Hei 9-11488 Japan has been described a kind of ink supply apparatus, and this equipment is equipped with the container of preservation ink and receives ink and it is fed to the back pressure regulator of printhead from this container.In this equipment, nozzle is located between container and the printhead, and nozzle is discharged from valve seat according to the pressure of container, causes ink to be supplied to printhead.From valve seat release nozzle the time, valve seat is separated with nozzle by diaphragm, diaphragm-type servo unit and the lever of back pressure regulator.
Because a large amount of parts are between diaphragm and valve seat, so that structure becomes is very complicated, cause many problems, for example be difficult to do this structure compactly, and the possible loss of power delivery.
The present invention is devoted to solve the problems of the technologies described above, and relates to a kind of liquid injection device, and its building mode is: the liquid from the liquid retainer is received by the valve unit with self-sealing function in the balladeur train side, and retainer separates fixing with balladeur train.Therefore, an object of the present invention is to provide a kind of low cost liquid spraying equipment of compactness, use therein valve unit, and the method for making this valve unit, this spraying equipment can improve the reliability of liquid supply.
Summary of the invention
According to an aspect of the present invention, provide a kind of liquid injection device, be used to address the above problem.This liquid injection device is equipped with fluid jetting head and valve unit, fluid jetting head is installed on the balladeur train, and can move back and forth along the horizontal direction of target, valve unit is installed on the balladeur train, and, supply liquid from the liquid retainer to valve unit, and valve unit is fed to fluid jetting head to liquid by service duct, valve unit has pressure chamber, and pressure chamber is connected to the liquid retainer by service duct; Valve, it opens or closes service duct, and liquid is fed to pressure chamber; Propulsion members, it is along the direction propulsion valve of closing service duct; With the fexible film member, the negative pressure that produces when it reduces according to the liquid in the pressure chamber is shifted, and it is directly delivered to valve to displacement, thereby causes the propulsive force work of valve against propulsion members.
According to another aspect of the present invention, provide a kind of method that is used to make valve unit with cell enclosure, pressure chamber and valve.When the liquid in the pressure chamber reduced, valve used the film member to detect the negative pressure of the minimizing that comes from liquid, and liquid is imported pressure chamber from the liquid retainer.Manufacture method comprises: the heating unit shell; The film member is placed on the cell enclosure, makes the film member cover the sunk part of heated cell enclosure; With the film member is heat fused on the cell enclosure, thereby form pressure chamber.
The method of another kind of manufacturing valve unit is provided according to a third aspect of the present invention.This method comprises: bearing plate is attached on first upper surface of film member; The mode of film member with the sunk part of capping unit shell is placed on the cell enclosure; Film member heat is attached on the cell enclosure, thereby forms pressure chamber.
According to a fourth aspect of the present invention, provide a kind of inkjet type recording apparatus that is equipped with record head and ink supply valve unit.Record head is installed on the balladeur train and moves back and forth along the horizontal direction of record-paper.The ink supply valve unit is installed on the balladeur train, and supplies ink from print cartridge to balladeur train by ink-feed channel, so that ink feed is arrived record head.The ink supply valve unit has: pressure chamber is connected to print cartridge by ink-feed channel; Valve unit, it opens or closes ink-feed channel, and ink feed is arrived pressure chamber; Driving body, it detects the negative pressure that produces in pressure chamber when ink is recorded head consumption, and operated valve; Keep spring with negative pressure, it is resisted against on the driving body, and its direction along the volume in expansion pressure chamber is advanced.
According to a fifth aspect of the present invention, provide a kind of liquid injection device, it is equipped with: the liquid storage member of storage of liquids; Fluid jetting head, its atomizing of liquids; The liquid service duct is used for liquid is fed to fluid jetting head from the liquid storage member; And valve unit, it is arranged in the liquid service duct, and interim storage of liquids.Valve unit has: the supply chamber will flow into this supply chamber from the liquid of liquid memory supply; Pressure chamber, the liquid that be exported to fluid jetting head is stored in this pressure chamber; And valve, its utilize when liquid by the negative pressure that when fluid jetting head sprays, in pressure chamber, produces, be connected to pressure chamber supplying the chamber.The liquid outlet that leads to fluid jetting head is located in the pressure chamber, is positioned at 25% position of the volume that is equal to or less than pressure chamber at gravity direction.
According to a sixth aspect of the invention, provide a kind of liquid injection device, it is equipped with: the liquid storage member of storage of liquids; Fluid jetting head, its atomizing of liquids; The liquid service duct is used for liquid is fed to fluid jetting head from the liquid storage member; Valve unit, it is arranged in the liquid service duct, and interim storage of liquids, and channel valve, and it is arranged in the liquid service duct, is positioned at the upstream of valve unit, is used to open and close the liquid service duct.Valve unit has: the supply chamber will be flowed into this supply chamber by the liquid from the liquid memory supply; Pressure chamber, the liquid that be exported to fluid jetting head is stored in this pressure chamber; And valve, its utilize when liquid by the negative pressure that when fluid jetting head sprays, in pressure chamber, produces, be connected to pressure chamber supplying the chamber.The liquid outlet that leads to fluid jetting head is located in the pressure chamber, is positioned at 40% position of the volume that is equal to or less than pressure chamber on gravity direction.
According to a seventh aspect of the present invention, provide a kind of liquid injection device, comprised: balladeur train, it by when target moves from a plurality of nozzle ejection liquid of fluid jetting head, liquid is attached on the target; The liquid retainer, it is located on the position that separates with balladeur train, and storage will be supplied to the liquid of balladeur train; Soft supply pipe, it is placed between liquid retainer and the balladeur train, and has formed the fluid passage that extends to balladeur train from the liquid retainer; And valve mechanism, be installed on the balladeur train, and be located at from supply pipe and extend to the fluid passage of fluid jetting head.The liquid retainer is arranged in predetermined altitude above the valve mechanism with interior in scope that balladeur train moves.
According to an eighth aspect of the present invention, provide a kind of liquid injection device, it is equipped with balladeur train and the liquid retaining part of being furnished with fluid jetting head, and the liquid retaining part is installed on the balladeur train, and keeps being supplied to the liquid of fluid jetting head.Liquid injection device is ejected into liquid on the target from fluid jetting head.Valve unit is located between fluid jetting head and the liquid retaining part.Valve unit has: valve, it is being connected to the pressure chamber of making at fluid jetting head one lateral confinement in the supply chamber that liquid retaining part one lateral confinement is made, perhaps the supply chamber is disconnected from pressure chamber, propulsion members, it is along the direction propulsion valve of closing service duct, and driving body, and it surveys the negative pressure from the minimizing of pressure intracavity liquid, and, the supply chamber is connected to pressure chamber by the propulsive force of valve against propulsion members.
Description of drawings
Fig. 1 is the exemplary plot that first ink feeding system is shown, and this system is suitable for implementing the present invention;
Fig. 2 is the exemplary plot that second ink feeding system is shown similarly;
Fig. 3 is the plane that illustrates according to the general structure of the printer of the first embodiment of the present invention, has wherein adopted first ink feeding system shown in Figure 1;
Fig. 4 is from the valve unit shown in the left side of valve unit and the perspective view of record head;
Fig. 5 is the perspective view of observing from the right side of valve unit;
Fig. 6 is the left view of valve unit;
Fig. 7 is the right view of valve unit;
Fig. 8 (a) and 8 (b) are the viewgraph of cross-section that the line 8-8 in Fig. 6 is got, and Fig. 8 (a) shows the valve closing state, and Fig. 8 (b) shows the valve open state;
Fig. 9 is the partial cross-sectional view that is illustrated in the structure of the supported hole that the demarcation strip of valve unit partly forms;
Figure 10 (a)-10 (d) is the first preferred fabrication block diagram, wherein, the fexible film member is attached to cell enclosure by heat, Figure 10 (a) illustrates the state of cell enclosure thermal expansion, Figure 10 (b) illustrates the state of having placed the film member, Figure 10 (c) shows the state that the film member is adhered to by heat, and Figure 10 (d) shows the state that film member and cell enclosure are cooled;
Figure 11 (a)-11 (c) is the second preferred fabrication block diagram, Figure 11 (a) illustrates bearing plate and is connected to state on the film member, Figure 11 (b) illustrates the film member and is placed on state on the cell enclosure, wherein bearing plate is connected on the film member, and Figure 11 (c) illustrates the state that the film member is adhered to by heat;
Figure 12 is the viewgraph of cross-section that another preferred ink supply valve unit is shown;
Figure 13 (a) and 13 (b) are the figure that another preferred ink supply valve unit is shown, and Figure 13 (a) is its front view, and Figure 13 (b) is the viewgraph of cross-section that the line 13b-13b in Figure 13 (a) is got;
Figure 14 is the perspective view that valve unit according to a second embodiment of the present invention is shown from the right side;
Figure 15 is similarly from the perspective view shown in the left side;
Figure 16 is the right view of the valve unit among Figure 14;
Figure 17 is the left view of this valve unit;
Figure 18 is the viewgraph of cross-section that the line 18-18 in Figure 17 is got;
Figure 19 is the viewgraph of cross-section that major part is amplified, and it shows the film member that will use in the valve unit according to second embodiment;
Figure 20 is the viewgraph of cross-section according to the valve body of the valve unit of second embodiment;
Figure 21 (a) and 21 (b) are the 3rd making step figure, wherein, the film member is attached on the cell enclosure by heat, and Figure 21 (a) illustrates the film member and is placed on state on the cell enclosure, bearing plate is bonded on the film member, and Figure 21 (b) illustrates the state that the film member is adhered to by heat;
Figure 22 (a) and 22 (b) are the 4th preferred fabrication block diagram, and Figure 22 (a) illustrates the film member and is placed on state on the cell enclosure, and bearing plate is connected on the film member, and Figure 22 (b) illustrates the state that the film member is adhered to by heat;
Figure 23 is according to improvement project, the viewgraph of cross-section of the heater block that use in one manufacturing approach;
Figure 24 is the perspective view that illustrates from the left side according to the valve unit of improvement project;
Figure 25 is the perspective view that this valve unit is shown similarly from the right side;
Figure 26 (a) and 26 (b) are the viewgraph of cross-section that a kind of improvement project of this valve unit is shown, and Figure 26 (a) illustrates the valve closing state, and Figure 26 (b) shows the valve open state;
Figure 27 is the figure of layout state of margining tablet that the motion of restriction film member is shown;
Figure 28 (a) and 28 (b) are the viewgraph of cross-section that the another improvement project of this valve is shown, and Figure 28 (a) illustrates the valve closing state, and Figure 28 (b) shows the valve open state;
Figure 29 (a) and 29 (b) show the valve unit according to the 3rd embodiment, and Figure 29 (a) illustrates the valve closing state, and Figure 29 (b) shows the valve open state;
Figure 30 is the enlarged cross-sectional view that the relation between the stroke that negative pressure keeps spring and Movable valve is shown;
Figure 31 (a) is the viewgraph of cross-section according to the valve unit of improvement project;
Figure 31 (b) is the viewgraph of cross-section according to the valve unit of another improvement project;
Figure 32 (a) is the viewgraph of cross-section according to the valve unit of another improvement project;
Figure 32 (b) is the perspective view of the leaf spring that uses in the valve unit in Figure 32 (a);
Figure 33 is the plane of conduct according to the printer of the liquid injection device of the 4th embodiment;
Figure 34 is mounted in the perspective view according to the valve unit in the printer of the 4th embodiment;
Figure 35 is the perspective view that the verso view of the valve unit from Figure 34 is shown;
Figure 36 is the right view of the valve unit among Figure 34;
Figure 37 is the left view of the valve unit among Figure 34;
Figure 38 (a) and 38 (b) are the viewgraph of cross-section that the line 38-38 in Figure 37 is got, and Figure 38 (a) illustrates the valve closing state, and Figure 38 (b) shows the valve open state;
Figure 39 is mounted in the perspective view according to the valve unit in the printer of the 5th embodiment;
Figure 40 (a) and 40 (b) show the valve unit that is installed in according in the printer of the 5th embodiment, and Figure 40 (a) is a plane, and Figure 40 (b) is the viewgraph of cross-section of the line 40b-40b in Figure 40 (a);
Figure 41 is the figure that the relation between liquid outlet position and the residual black concentration is shown;
Figure 42 (a) and 42 (b) illustrate the valve unit that is installed in according in the printer of the 6th embodiment, and Figure 42 (a) is a plane, and Figure 42 (b) is the viewgraph of cross-section of the line 42b-42b in Figure 42 (a);
Figure 43 is mounted in according to the valve unit perspective view in the printer of the 6th embodiment;
Figure 44 is according to the perspective view in the printer of the 7th embodiment;
Figure 45 illustrates the local enlarged cross-sectional view of the major part of the printer among Figure 44;
Figure 46 is the plane that the major part of the printer among Figure 44 is shown;
Figure 47 is the left view of the valve unit that uses in the printer in Figure 44;
Figure 48 is the right view of similar this valve unit;
Figure 49 illustrates the concept map that acts on the power on the valve unit;
Figure 50 illustrates the height of valve unit and the figure of the relation between the pressure loss;
Figure 51 is the perspective view that illustrates according to the major part of the printer of the 8th embodiment;
Figure 52 is the local enlarged cross-sectional view that the major part of the printer among Figure 51 is shown;
Figure 53 is the front view according to the printer of prior art;
Figure 54 is the schematic diagram that the structure of the printer among Figure 53 is shown;
Figure 55 illustrates perspective view according to the part of the printer of the 9th embodiment in the mode of cutting open;
Figure 56 is the perspective view that the balladeur train of the printer Figure 55 is shown from the left side;
Figure 57 is the perspective view that the balladeur train of the printer Figure 55 is shown from the right side;
Figure 58 (a) and 58 (b) show the confined state of print cartridge, and Figure 58 (a) is a right view, and Figure 58 (b) is the viewgraph of cross-section that the line 58b-58b in Figure 58 (a) is got;
Figure 59 (a) and 59 (b) show the disassembled state of print cartridge, and Figure 59 (a) is a left view, and Figure 59 (b) is the viewgraph of cross-section that the line 59b-59b in Figure 59 (a) is got;
Figure 60 (a) and 60 (b) are the viewgraph of cross-section that the line 60-60 in Figure 59 (a) is got, and Figure 60 (a) shows the valve closing state, and Figure 60 (b) illustrates the valve open state;
Figure 61 shows the local enlarged cross-sectional view of the supported hole of valve unit;
Figure 62 is the perspective view that illustrates from the right side according to the balladeur train of the tenth embodiment;
Figure 63 is the perspective view that the balladeur train Figure 62 is shown from the left side;
Figure 64 is the right view of print cartridge;
Figure 65 is the left view of print cartridge;
Figure 66 (a) and 66 (b) are the viewgraph of cross-section that the line 66-66 in Figure 65 is got, and Figure 66 (a) illustrates the confined state of print cartridge, and Figure 66 (b) illustrates the disassembled state of print cartridge.
Preferred forms
Below with reference to accompanying drawing, a kind of inkjet type recording apparatus will be described, this recording equipment has specifically been implemented the liquid injection device according to the first embodiment of the present invention.At first, Fig. 1 and Fig. 2 show the basic structure as the ink feeding system of the recording equipment of liquid injection device, and this equipment is suitable for implementing the present invention.As illustrated in fig. 1 and 2, be fixed to main body one side of recording equipment as the print cartridge 1 of ink retainer, and be connected on the valve unit 3 that is installed on the balladeur train by the flexible pipe that constitutes ink-feed channel, balladeur train will discussed after a while.Ink in the print cartridge 1 is supplied to the record head 4 that is installed on the balladeur train by valve unit 3.
Ink feeding system shown in Fig. 1 is the supercharging air supply type.That is, print cartridge 1 has airtight shell 7, and inner sealing has ink packaging body 1a ink, that made by flexible material to be maintained in the shell 7.Then, the pressurized air of air boost pump 5 generations is supplied to the gap 1b that forms between shell 7 and the ink packaging body 1a.Therefore, ink packaging body 1a bears compressed air, and the ink that is sealed in the ink packaging body 1a is supplied to valve unit 3 on the balladeur train by pipeline 2.Then, the ink that is fed to valve unit 3 is fed to record head 4, and ink is discharged from record head 4.
Ink feeding system as shown in Figure 2 then utilizes head difference from print cartridge 1 supply ink.That is, being sealed with ink packaging body 1a ink, that made by flexible material in it is maintained in the print cartridge 1.The derivation part 1c of print cartridge 1 is along the gravity direction setting, and is positioned on the valve unit 3.Therefore the normal pressure based on head difference causes the ink in the ink packaging body 1a to be supplied to the valve unit 3 that is installed on the balladeur train by flexible pipe 2.
According to inkjet type recording apparatus of the present invention can be in above-mentioned ink feeding system any one in use.Fig. 3 shows a kind of basic structure of inkjet type recording apparatus, and this equipment has adopted ink feeding system shown in Figure 1.Among Fig. 3, balladeur train is represented with label 11.Balladeur train be with 13 synchronously by carriage motor 12 drivings, and balladeur train 11 moves back and forth on the broadband direction of main scanning direction or record-paper promptly at the length direction of paper feed member 15 by being with 13 to be directed to scanning guiding elements 14 synchronously.Inkjet type record head 4 (see figure 4)s are installed in the side of balladeur train 11, and described side is towards described paper feed member 15, and is still not shown in Fig. 3.
Be used for being installed in balladeur train 11 to valve unit 3B, 3C, 3M and the 3Y of record head 4 supply inks.In the following description, each valve unit all can only be represented with label 3.In this embodiment and corresponding ink (for example black ink B and cyan C, red M and the various color inks of yellow Y) be associated, provide four valve unit 3B, 3C, 3M and 3Y, temporarily to store corresponding ink in inside.
Black ink and various color inks are fed to valve unit 3B, 3C, 3M and 3Y by the flexible pipe 2 of correspondence from print cartridge 1B, 1C, 1M and 1Y, described each print cartridge is positioned at print cartridge clamper 17, be disposed in main body one side of recording equipment, flexible pipe 2 has constituted ink-feed channel.In the following description, each print cartridge all can only be represented with label 1.
Can seal record 4 the nozzle cap seal device 18 that forms face be positioned at non-print zone (original position) on the mobile route of print cartridge 11.The cap seal member 18a that forms with the elastomeric material of for example rubber is set on the cap seal device 18, and the nozzle of cap seal member 18a and record head 4 forms face and closely contacts, so that can form face by sealed-in nozzles.When print cartridge 11 moved to original position, cap seal device 18 moved (rising) to record head 4, was sealed by cap seal member 18a so the nozzle of record head 4 forms face.
The nozzle of cap seal member 18a seal record 4 when recording equipment is idle forms face, becomes dry to prevent nozzle opening.An end of pipe that is used to carry out the suction pump (tubing pump) of cleaning operation is connected to the base section of cap seal member 18a.When cleaning operation, make the suction function that produces by suction pump on record head 4, so that draw and discharge ink from record head 4.
The Wiping member 19 that forms rectangular tab is made by the elastomeric material of for example rubber, is closed on print zone one side that cap seal device 18 is arranged on cap seal device 18, and as required, moves to the mobile route of record head 4, so that nozzle is formed the face wiped clean.Label 5 expression pressurized air pumps, and the part by being connected with print cartridge clamper 17 are imported in the shell 7 among each print cartridge 1B, 1C, 1M and the 1Y by the air of air boost pump 5 superchargings.Then, the normal pressure of pump 5 makes and to be supplied to each valve unit 3B, 3C, 3M and 3Y on the balladeur train 11 from the ink of each print cartridge 1B, 1C, 1M and 1Y by each pipeline 2.
Fig. 4 and Fig. 5 show aforementioned valve unit 3 and receive the structure of the record head 4 of ink from valve unit 3.Although purpose for convenience, Fig. 4 and Fig. 5 show the state that two valve units 3 are installed in the top section of record head 4, can have with the ink color that sprays from single record head 4 to be associated, and the situation of a plurality of valve units 3 further is installed.In addition, can prepare a plurality of groups, each group has two valve units 3 at single record head 4, shown in Figure 4 and 5.
Shown in Figure 4 and 5.The cell enclosure 20 that the profile of valve unit 3 is made by the synthetic resin that makes writing board shape constitutes, and has at one end formed coupling part 21.Pipeline 2 is connected to coupling part 21.Be imported into valve unit 3 from the ink of each print cartridge 11 supply by coupling part 21.As shown in Figure 4, fexible film member 22 sticks to a side of valve unit 3 by hot adherence method, and has constituted the part of pressure chamber 34, and pressure chamber 34 is discussed after a while.
In addition, the bearing plate 23 of using the hard material of comparing with film member 22 to make is attached to the core of film member.Bearing plate 23 should be low weight, with convenient balladeur train when print waiting operation mobile, the deadweight of bearing plate 23 and the acceleration of balladeur train can mobile film member 22 to the degree that has changed the interior pressure of pressure chamber 34.Therefore, bearing plate 23 the most handy plastic materials form, for example polyethylene or polypropylene.
Before the film member is attached to cell enclosure 20, can be attached to bearing plate 23 on the film member 22 with hot adherence method, perhaps after film member 22 is attached on the cell enclosure 20, bearing plate 23 is attached on the film member 22 with bonding agent or two-sided tape etc.Although bearing plate 23 is done as a plate among the embodiment shown in the figure, it is not limited to plate-like especially.But, under the inner pressure chambers 34 that form of valve unit 3 have formed as will be discussed later the situation in buttress shaft shape space, preferably use the bearing plate 23 of plate-like, and arrange bearing plate 23 with one heart with respect to pressure chamber 34.
As shown in Figure 5, ink lead-out divides 24 to form in valve unit 3, and the connecting elements 25 of ring-type between ink lead-out divide 24 and the head bracket 26 of record head 4 between.Like this, ink is supplied to record head 4 by connecting elements 25 from valve unit 3 respectively.
Groove shape ink introduction channel 31 forms in cell enclosure 20, and shell 20 has constituted the profile of valve unit 3 as shown in Figure 7.Ink by pipeline 2 21 supplies from the coupling part is supplied to ink supply chamber 32 by ink introduction channel 31, and ink supply chamber 32 forms near the center of cell enclosure 20.
This ink supply chamber 32 is made of the cylindric space of low capacity as shown in Figure 8, and spring base 33 is loaded into ink supply chamber 32 in the side of cell enclosure 20.Like this, after spring base 33 was loaded into, film member 37 adhered to the mode heat that covers ink supply chamber 32 and ink introduction channel 31 with respect to cell enclosure 20, thereby seals up ink supply chamber 32 and ink introduction channel 31.
In addition, be placed between tabular component 38a and the spring base 33 as the spiral helicine Packing spring 39 of propulsion members, and the action of Packing spring 39 with slight pressure towards demarcation strip 35, promptly along the direction extruding tabular component 38a that closes ink supply aperture 42.
Do picture annulus rubber seal member 41 by hot adherence method or similarly method be attached on the demarcation strip 35 in mode around supported hole 36.Therefore, the tabular component 38a of Movable valve 38 is resisted against on the containment member 41 under the propulsive force effect of Packing spring 39.Containment member 41 can be an O type ring etc., and elastomer resin etc. can be integrally formed by double-colored configuration (dichroic formation) and cell enclosure 20, as containment member.
Across forming a plurality of hole 42a that cut open, shown in the amplifier section of Fig. 9, and those are cut hole 42a open and have constituted the ink supply aperture 42 that extends to pressure chamber 34 from ink supply chamber 32 around 36 of the supported holes of demarcation strip 35.In the embodiment shown in fig. 9, form 4 around supported hole 36 and cut hole 42a open.Containment member 41 mode with the outside that surrounds ink supply aperture 42 on demarcation strip 35 is provided with.
The pressure chamber 34 of cell enclosure 20 is made of sunk part 44, sunk part 44 have from cell enclosure 20 cut open cylindrical.Film member 22 closely be attached to by hot attachment means shell 20 formation that side of sunk part 44.That is, pressure chamber 34 is made of sunk part 44 that forms in cell enclosure 20 and the film member 22 that covers it.
As shown in Figure 6, the outlet 45 of pressure chamber 34 forms along gravity direction in the highest part.The ink derivation passage 46 that is connected to the outlet 45 of pressure chamber is arcuation ground along sunk part 44 and forms.The outlet 45 of pressure chamber and ink are derived passage 46 and are made of relative slot part in cell enclosure 20 and the film member 22 that is covered with these slot parts.Ink is derived near passage 46 penetrated cell shell 20 ink lead-out divides 24, and is connected to ink lead-out and divides 24.Ink divides 24 vertically to be derived in ink lead-out, and is supplied to record head 4 like that as previously described.
In said structure, by using as Fig. 1 or ink feeding system shown in Figure 2, ink is supplied to valve unit 3 under positive pressure.In this case, as long as the supply flow rate of ink is set to the level of dealing with the quantity of ink that record head 4 consumes in printing.When carrying out aforementioned cleaning operation, because forming face, the nozzle of record head 4 is sucked, so be supplied to the flow rate of the ink of valve unit 3 to increase by using cap seal device 18.
Under the non-print state of record head 4, promptly, under the state that does not consume ink, the spring load W1 (not shown) of the Packing spring 39 in the valve unit 3 is applied on the tabular component 38a of Movable valve 38, and pressure P 1 (not shown) that be supplied to the ink in ink supply chamber 32 also is applied on the tabular component 38a.Therefore, shown in Fig. 8 (a), tabular component 38a is resisted against above the containment member 41, makes Movable valve 38 be in the valve closing state.Be that valve unit 3 is in the self sealss state.
On the other hand, consume under the print state of ink at record head 4, film member 22 is according to the minimizing of the ink in the pressure chamber 34 sunk part 44 displacements to cell enclosure 20, so the core of film member 22 is resisted against on the end of bar member 38b of Movable valve 38.Wd (not shown) representative is corresponding to the displacement reaction force of film member 22 displacement this moment.Along with record head 4 continues to consume ink, in pressure chamber 34, produced negative pressure P2 (not shown).Surpass at negative pressure P2 under the situation of displacement reaction force Wd sum of the pressure P of spring load W1, ink and film member 22, promptly satisfy under the situation of relation of P2＞W1+P1+Wd, film member 22 catch bar member 38b, remove tabular component 38a to containment member 41 against, so Movable valve 38 becomes the valve open state as shown in Fig. 8 (b).
Therefore the ink in the ink supply chamber 32 is supplied in the pressure chamber 34 by ink supply aperture 42, has eliminated the negative pressure in the pressure chamber 34.Correspondingly, Movable valve 38 moves, and is switched to the valve closing state shown in Fig. 8 (a) once more, stops from ink supply chamber 32 to pressure chamber 34 ink feed.
In other words, exist in pressure chamber 34 under the situation of bubble, the volume of bubble is because of the variation of environment temperature changes, the problem of having brought the interior pressure of pressure chamber 34 thereupon to become, thereby can not look to the correct work of valve.Therefore, to form along gravity direction in its highest part be a key factor in such ink supply valve unit in the outlet 45 of pressure chamber 34.
According to first embodiment, 4 ink feeding system is by constituting to the passage of the sealing of wherein injecting ink from print cartridge 1 to record head.Therefore, adopt this structure, by using degassed ink, remaining in minute bubbles in the ink feeding system etc. can be by ink absorption.Therefore, might overcome the reduction of reliability in the valve on/off operation, the reduction of this reliability is when variation of ambient temperature, owing to the existence of bubble occurs, and might reducing significantly, or the degree of so-called point defect appearance because of the bad printing that remains in the bubble in the ink feeding system.
Then, Figure 10 (a) shows the preferred manufacturing process of the manufacture method that is used for valve unit 3 to 10 (d), particularly the manufacturing process when the fexible film member 22 of the part of the pressure chamber 34 that constitutes valve unit 3 is attached to the situation of cell enclosure 20 by heat.In order to reduce the variation in the detection of negative pressure, and make pressure chamber 34 compactnesses, be attached to film member 22 on the cell enclosure 20 very important with abundance pliable and tough hot in nature.
According to the manufacturing process that illustrates to 10 (d) at Figure 10 (a), because cell enclosure 20 is inflated by heating, and film member 22 is attached on the cell enclosure 20 by heat in this state, has sufficient flexible state when using under the normal temperature so film member 22 is positioned in.
That is, shown in Figure 10 (a), at first, cell enclosure 20 is placed on heating on the heater block 51, and the sunk part 44 that constitutes pressure chamber 34 is as upper surface.Therefore, cell enclosure 20 is heated parts 51 heating, and the direction thermal expansion of arrow C in Figure 10 (a), that is, expand towards two outsides.Then, place the sunk part 44 that film member 22 covers heated cell enclosure 20, shown in Figure 10 (b).
Then, shown in Figure 10 (c), be used for heater block 52 that heat adheres to and move down, applying suitable pressure, thereby film member 22 heat are attached on the cell enclosure 20 from the top of film member 22.Then, shown in Figure 10 (d), cell enclosure 20 is removed from each heater block 51 and 52, and is naturally cooled to normal temperature, so that the thermal expansion of absorptive unit shell 20, and cell enclosure 20 shrink slightly.This can provide sufficient pliability to cell enclosure, and film member 22 is attached on this cell enclosure by heat.
Then, Figure 11 (a) shows to 11 (c) film member 22 heat is attached to another preferred fabrication process under the situation on the cell enclosure 20.In the manufacturing process that Figure 11 (a) illustrates to 11 (c),, in the time of abundant crooked film member 22, can be attached to film member 22 heat on the cell enclosure 20 at the thickness that is attached to the bearing plate on the film member 22 by utilization.
That is, shown in Figure 11 (a), at first, bearing plate 23 is attached to a side of film member 22.In this case, though can be attached to bearing plate 23 on the film member 22 with bonding agent or two-sided tape etc., the most handy hot adherence method is attached to film member 22 on the bearing plate 23.
The film member 22 of bearing plate 23 is posted in placement, makes bearing plate 23 be in the top with respect to cell enclosure 20, during placement unit shell 20 sunk part 44 as upper surface.In this case, be used for the heater block 52 that heat adheres to and moved down,, shown in Figure 11 (c), thereby film member 22 heat are attached on the cell enclosure 20 to apply suitable pressure by top from film member 22.
In this case, because the lower surface of the heater block 52 shown in Figure 11 (c) is formed by single plane, in the process that heat is adhered to, be pressed into sunk part 44 1 sides so sticked the core of the film member 22 of bearing plate 23, corresponding with the thickness of bearing plate 23.In this state, the periphery of film member 22 is heated parts 52 heat and is attached on the cell enclosure 20.This cell enclosure 20 that can adhere to for 22 heat of film member provides sufficient pliability.
Then, Movable valve 38 shown in Fig. 8 and Packing spring 39 are inserted into the ink supply chamber 32 of cell enclosure 20, and heat is attached with film member 22 on the cell enclosure 20.Spring base 33 is loaded into the end face in ink supply chamber 32, and ink supply chamber 32 and ink introduction channel 31 sealed by film member 37, thereby produces valve unit 3.
Figure 12 shows another optimal way of valve unit 3.Notice that the basic structure of the valve unit 3 shown in Figure 12 is also shown in the Fig. 8 that had discussed, and its major part is represented with same label.In the valve unit shown in Figure 12 3, the outer surface that heat is attached to the film member 22 on the cell enclosure 20 is further covered with waterproof film member 54.
That is to say that soft material has been used to constitute the film member 22 of the part of pressure chamber 34, thereby can detect negative pressure state effectively, and this flexible material is not chemically influencing ink character.Therefore, as early pointing out, high density polyethylene (HDPE) or polypropylene are applicable to film member 22.But because this material has small permeability rate, so there is technical problem, the moisture content that feasible evaporation of ink from pressure chamber 34 goes out sheds from pressure chamber 34.
Like this, by outer surface, can reduce the degree that moisture content that the evaporation of ink from pressure chamber 34 goes out sheds from pressure chamber 34 with as shown in figure 12 waterproof film member 54 further cover film members 22.Aluminium foil or on it polymer film with the aluminium vapour deposition can be used as waterproof film member 54.
For same purpose, Figure 13 (a) also is suitable for using to the valve unit 3 shown in 13 (b).It is noted that Figure 13 (a) to the basic structure of the valve unit 3 shown in 13 (b) shown in the Fig. 6 to 8 that had discussed.And its major part is represented with identical label.
That is to say, in the mode shown in Figure 13, provide the lid 56 of the outer surface of a sealing film member 22 to the mode shown in Fig. 6 to 8.Through hole 57 forms in the part of lid 56, and the slot part 58 of the single zigzag bending that is communicated with through hole 57 forms on the surface of lid 56.The end of slot part 58 is connected to the non through hole 59 that forms in lid 56.The single film member 60 of through hole 57, slot part 58 and hole 59 usefulness covers.In this case, the most handy hot attachment means bonds to film member 60 and covers on 56.Then, form gas vents by the film member 60 that staves coverage hole 59 with sharp-pointed instrument etc.
Therefore, film member 22 tegmentums 56 that constituted the part of the pressure chamber 34 in the valve unit 3 cover with airtight conditions, and being connected to gas vent (representing) with the label 59 identical with non through hole by gas channel (representing with the label 58 identical) with slot part, gas channel forms by through hole 57 and the slot parts 58 that cover formation in 56 with film member 60.
Adopt this structure, when lid 56 inside makes gas channel 58 and the gas vent 59 during to atmosphere opening of pressure chamber 34 by through hole 57, lid 56, the pressure in the lid 56 are held constant, and will can not go wrong.The moisture content of the film member 22 of the part by having constituted pressure chamber 34 sheds through long gas channel 58, has therefore been suppressed effectively.
With reference now to Figure 14 to 22,, the liquid injection device that is embodied as the second embodiment of the present invention is described.Because this embodiment is only different with first embodiment on the structure of valve unit 3, thus same label will be given with present embodiment in the foregoing description in similar part, and will omit detailed description to them.
In the valve unit 3 of second embodiment, shown in Figure 14 to 17, the coupling part 21 that is used for connecting pipe 2 forms at the top of its cell enclosure 20, and ink lead-out divides 24 in the formation of the bottom of cell enclosure 20.Filter chamber sunk part 61, central concave part 62, first slot part 63 and second slot part 64 form at first side surface of cell enclosure 20, and first slot part 63 and central concave part 62 are communicated with, and second slot part 64 is away from the each part mentioned above setting.Film member 37 in the mode that covers filter chamber sunk part 61, central concave part 62 and first and second slot parts 63,64 by on first side surface of heat attached to cell enclosure 20.Therefore, filter chamber sunk part 61 becomes filter holding chamber 66, the first slot parts 63 and becomes ink introduction channel 31, the second slot parts 64 and become ink lead-out and divide 46.
As shown in figure 18, formed through hole h1 and the sloping portion 61a with inclined surface in the bottom of filter chamber sunk part 61, inclined surface increases towards through hole h1 direction apart from the degree of depth of first side surface.Filter element 67 by hot adherence method, is fixed to the bottom of filter chamber sunk part 61 by the mode with covering sloping portion 61a along gravity direction.Therefore, the filter element in filter holding chamber 66 67 above formed the residual bubble residual fraction 66a of bubble.Filter element 67 is formed by twill weave stainless steel or nonwoven etc.
Shown in Figure 14 and 16, on cell enclosure 20 second side surface relative, sunk part 69 and the 3rd slot part 70 have been formed with first side surface, sunk part 69 forms pressure chamber 34, the three slot parts 70 and communicates with the filter chamber sunk part 61 and first slot part 63.Film member 72 is attached to second side surface by heat, and it makes sunk part 69 become pressure chamber 34, and makes the 3rd slot part 70 become the part of ink introduction channel 31.In this embodiment, film member 72 is by the aluminium oxide (Al that adheres on high density polyethylene (HDPE) or the polypropylene
2O
3) vapour deposition PET (PET) makes.The aluminium oxide of vapour deposition on PET is equal to gas shielding layer.PET is with respect to such as environmental changes such as humidity variations, size and and rigidity keep geostationary material, and for same pressure, it demonstrates much the same pliability.In whole embodiment, as shown in figure 19, the film member 72 of use has 20 micron thickness high density polyethylene (HDPE)s or polypropylene film S1, the aluminium oxide vapor deposition layer S2 of 500 dusts and 12 micron thickness PET film S3.
The manufacture method of the valve unit 3 of second embodiment is described below with reference to Figure 21 (a) and 21 (b) and Figure 22 (a) and 22 (b).At first, with reference to Figure 21 (a) and 21 (b), the description that fexible film member 72 heat that a kind of handle constituted the part of valve unit 3 are attached to the manufacture method on the cell enclosure 20 will be provided.
Shown in Figure 21 (a), bearing plate 23 is bonded on the film member 72, and film member 72 is placed on the cell enclosure 20, and heater block 52 is moved down with respect to film member 72.In the present embodiment, heater block 52 heart therein has heat-insulating material projection 52a, that is, when heater block 52 was lowered, sufficient pressure was applied on the film member 72, and projection 52 extruding bearing plates are shown in Figure 21 (b).In this state, heater block 52 is pressed against film member 72 on the cell enclosure 20, and film member 72 heat are attached on the cell enclosure 20.Heater block 52 removed from cell enclosure 20 just obtain heat and adhered to cell enclosure 20 with enough flexible film members 72.
In addition, in making valve unit 3, can use core to form the heater block 52 of folder hole (chuckhole) 52b, shown in Figure 22 (b).Still in this case, at first, shown in Figure 22 (a), the film member 72 that is bonded with bearing plate 23 is placed on the cell enclosure 20.
Then, shown in Figure 22 (b), heater block 52 is moved downward, and the air between heater block 52 and the cell enclosure 20 is discharged from by folder hole 52b.Therefore, bearing plate 23 is clipped on the folder hole 52b.In this state, heater block 52 presses against film member 72 on the cell enclosure 20, so that its heat is attached on the cell enclosure 20.When removing heater block 52, obtained being adhered to cell enclosure 20 with sufficient flexible film member 72 by heat.
As mentioned above, second embodiment provides the effect identical with first embodiment, and following effect can be provided.
In a second embodiment, filter holding chamber 66 be set at ink lead-out divide 24 and ink supply chamber 32 in the middle of, and in filter holding chamber 66, be provided with filter element 67.Because filter element 67 can be caught for example foreign matter of dust, so can reduce because of sneaking into the poor sealing of the containment member 41 that foreign matter causes.
Because filter element 67 is placed in the bottom of filter holding chamber 66, and forms the space above filter element 67, so bubble bu remains in the bubble residual fraction 66a of filter element 67 tops, shown in the double dot dash line among Figure 17 owing to buoyancy.Therefore, the bubble in the filter holding chamber 66 is difficult to enter through hole h1, and ink can be fed to ink supply chamber 32 and pressure chamber 34 more reliably like this, and can make that the motion of Movable valve 38 is more reliable.
In a second embodiment, the through hole h1 that leads to ink supply chamber 32 is connected to the bottom of filter holding chamber 66, is provided with filter element 67 in holding chamber 66.Bubble bu is subjected to very big resistance by filter element 67 time, so if bubble bu remains in the filter holding chamber 66, then both be to apply certain impact to them, they also are difficult to move down.Therefore, remain in the through hole h1 that bubble bu in the filter holding chamber 66 more are difficult to the bottom by being positioned at filter holding chamber 66 and enter ink supply chamber 32.This makes and might supply inks to ink supply chamber 32 and pressure chamber 34 more reliably, and prevent that bubble bu from flowing out from record head 4 in print procedure.
As shown in figure 19, the film member 72 among second embodiment has the alumina layer that is clipped in the vapour deposition between the film of synthetic resin (high density polyethylene (HDPE) or polypropylene film and PET film).Because film member 72 is formed by soft synthetic resin, and, therefore can open on/off valve more reliably discharging easy deformation under the very little negative pressure that liquid produced.Because the alumina layer S2 of vapour deposition is located between the film of synthetic resin, so film member 72 can form the material of low air penetrability, and the character of liquid in the pressure chamber 34, for example viscosity has the variation that causes because of water evaporates still less.In addition, because the alumina layer S2 of vapour deposition is the oxide formation with aluminium, so material might influence the ink in the pressure chamber 34, but it is sandwiched between the film of synthetic resin, and therefore, it can not cause the chemical change of liquid property.Therefore, can improve the operational reliability of valve unit 3.
The film member 72 of second embodiment is the aluminium oxide PET films that bond to the vapour deposition on high density polyethylene (HDPE) or the polypropylene film.Use the film member 72 of this material can be, and can provide much the same pliability by same relatively pressure so that the size and the variation of rigidity are less with respect to the environmental change of for example humidity.Because film member 72 has low air penetrability and rate of perviousness, so might suppress the evaporation of moisture content, admixture of gas etc. by film member 72.The variation of the ink viscosity in the pressure chamber 34 that therefore might suppress to limit and the generation of bubble by film member 72.
In a second embodiment, as shown in figure 20, containment member 41 is integrally formed with Movable valve 38.Containment member 41 and integrally formed with Movable valve 38, and be not deposited on the cell enclosure 20.In general, for containment member 41 and film member 22,31 are deposited on the cell enclosure 20, their material preferably should be identical.But because in the present embodiment, containment member 41 is integrally formed with Movable valve 38, forms if cell enclosure 20 usefulness are different from the material of containment member 41 very much, also can guarantee good sealing.This can enlarge the range of choice that is used for cell enclosure 20 and will deposits the material of film member 72,37 thereon, thereby makes it possible to select material cheaply.
In manufacture method according to second embodiment shown in Figure 21 (a) and 21 (b), be used for film member 72 heat be attached on the cell enclosure 20 heater block 52 therein the heart have protruding 52a.Therefore under the situation of protruding 52a extruding bearing plate 23, film member 72 is deposited on the cell enclosure 20.That is, might obtain to make film member 72 to be deposited to valve unit 3 on the cell enclosure 20 with having certain pliability.This like this pliability can be suppressed at the reaction force when producing back-pressure in the pressure chamber 34, and film member 72 extruding Movable valves 38.Even environmental change occurs, strain can not take place in film member 72 yet, and by suppressing the reaction force of film member 72 to greatest extent, can keep film member 72 operating pressure evenly.
In a second embodiment, the protruding 52a of extruding bearing plate 23 heater blocks 52 forms with heat-insulating material.Therefore, heat is difficult to be passed to film member 72 by bearing plate 23, adheres to so have only the part that needs to be easy to underground heat.
Shown in Figure 22 (a) and 22 (b), in a second embodiment, folder hole 52b is located at the center of heater block 52.Therefore, air is discharged from folder hole 52b, causes bearing plate 23 to be attracted to folder hole 52b.Because film member 72 is being attached on the cell enclosure 20 under this condition, can be attached on the cell enclosure 20 by simple structure so have sufficient flexible film member 72.Therefore, the reaction force in the time of might suppressing to greatest extent to produce negative pressure and film member 72 extruding Movable valves 38 in the pressure chamber 34, and might keep the operating pressure of film member 72 even.
First and second embodiment can make following modification.
In a second embodiment, can change the size and the shape of filter holding chamber 66 inner filtration members 67.
In a second embodiment, bearing plate 23 can be located at film member 72 inboards (in cell enclosure 20 1 sides) rather than be located at the outside.
In a second embodiment, as shown in figure 23, a plurality of protruding 52a can be set on heater block 52, and utilize these protruding 52a to push down heater block 52 in a plurality of positions, film member 72 can be attached on the cell enclosure 20 by heat.In addition, the projection of an annular is provided for heater block 52, thereby, can be attached to film member 72 heat on the cell enclosure 20 by pushing down bearing plate 23 with this projection.
In a second embodiment, shown in Figure 24 and 25, be weight reduction, sunk part 75 can be arranged on: between filter chamber sunk part 61, sunk part 62 and the slot part 63,64; Slot part 64 outsides; Sunk part 69 outsides.In this case, it is lighter that balladeur train 11 becomes thereupon, makes the load of the mechanism might reduce to drive balladeur train 11, and make recording equipment littler.
Although in a second embodiment, protruding 52a forms with heat-insulating material,, protruding 52a can be with integrally formed with protruding 52a other part identical materials in addition.
Although provided the description of each embodiment with the printer (PRN device that comprises facsimile machine, duplicator etc.) that sprays ink as liquid injection device, these embodiment also can be the liquid injection devices that sprays other liquid.For example, it can be the liquid injection device that sprays such as the liquid of electrode material and coloring material, and this equipment is used to make LCD, EL display and surface emitting display; It can be the liquid injection device that sprays biological organic substance, and this equipment uses in making biochip; It also can be sample injection device, for example precise pipet.
In addition,, can form a plurality of restriction projectioies 76, reduce significantly, for example when cleaning operation, limit the displacement of film member 22 with the pressure in the convenient pressure chamber 34 towards bearing plate 23 in the bottom of sunk part 44 as Figure 26 (a) and (b) and shown in Figure 27.Projection 76 in this modification comprises 4 arcuate convex, and arcuate convex is outstanding in the mode of encircles rod member 38b from the bottom of sunk part 44.Between adjacent restriction projection 76, formed ink channel.These projectioies 76 be arranged on the concentric circumference of the axis of bar member 38b on.When the tabular component 38a of the Movable valve under the valve closing state 38 is resisted against on the containment member 41, formed clearance G between tabular component 38a and the spring base 33, the interval H between each restriction projection 76 and film member 22 is set to less than clearance G.
Therefore when film member 22 was shifted, the inner pressure relief of pressure chamber 34 caused bearing plate 23 to be resisted against on the bar member 38b by film member 22, moves Movable valve 38 against the propulsive force of Packing spring 39, thereby Movable valve 38 is switched to the valve open state.In this state, the ink by supported hole 36, moves near the bar member 38b 32 by supported hole 36 from the ink supply chamber, by limiting the passage between the projection 76, and is almost spreading out in whole pressure chamber 34 parts.
Thereafter, when the back of bearing plate 23 by film member 22 was resisted against on the restriction projection 76, the further displacement of film member 22 was restricted.Therefore,,, for example, when cleaning, there is not big load to be applied on the bar member 38b of Movable valve 38, so can prevent stopping bar member 38b distortion or fracture even the inner pressure relief of pressure chamber 34 is considerable according to modification yet.
Because in this modification, the height H ratio gap G of each restriction projection 76 is little, even the displacement of film member 22 is restricted, there is the gap between tabular component 38a that has also guaranteed at Movable valve 38 and the spring base 33, so Packing spring 39 will can not be subjected to surpassing the extruding that needs.
In the further modification shown in Figure 28 (a) and 28 (b), those in the modification among the structure of bearing plate and each restriction projection and Figure 26 (a) and 26 (b) are different.That is, in this further modification, bearing plate 23 is attached to the inner surface of film member 22, and each restriction projection 76 is from the base projections of bearing plate 23 to sunk part 44.Gap I between the bottom of each restriction projection 76 and sunk part 44 is set to less than clearance G, clearance G is when the tabular component 38a of the Movable valve under the valve closing state 38 is resisted against on the containment member 41, the gap that forms between tabular component 38a and the spring base 33.
Therefore, in this modification, when displacement along with film member 22, after Movable valve is switched to the valve open state, when the restriction projection 76 on the bearing plate 23 was resisted against on the bottom of sunk part 44, shown in Figure 28 (b), the further displacement of film member 22 was restricted.Therefore, this modification provide with Figure 26 (a) and 26 (b) in the identical effect of modification.
Specifically having implemented the third embodiment of the present invention will be by according to Figure 29 (a), 29 (b) and Figure 30 discussion, and emphasis is the difference with above-mentioned each embodiment.
Shown in Figure 29 (a), 29 (b), negative pressure keeps spring 40 to be set in the pressure chamber 34 in the mode of the bar member 38b of encirclement Movable valve 38.Negative pressure keeps an end of spring 40 to be fixed by the annular projection that forms on demarcation strip 35, and the other end is resisted against on the film member 22.Therefore, the direction of propulsion that negative pressure keeps spring 40 is consistent with the moving direction of bearing plate 23 on being attached to film member 22, and propulsive force acts on the direction of volume in expansion pressure chamber 34.
Negative pressure keeps make peace the greatly loop diameter of aforementioned Packing spring 39 of the loop diameter of spring 40 identical, and less relatively.Therefore, negative pressure keeps spring 40 to be resisted against near the center of bearing plate 23 by film member 22.
When using Fig. 1 or ink feeding system shown in Figure 2 in the valve unit 3 at the 3rd embodiment,, under positive pressure, supply ink according to the various embodiments described above.When carrying out cleaning operation, the flow rate that be supplied to the ink of valve 3 is enhanced, so that use the nozzle of cap seal device 18 suction record heads 4 to form face.
Here, when record head 4 is in non-print state, promptly do not consume under the state of ink, the spring load W1 (not shown) of the Packing spring 39 in the valve unit 3 is applied on the tabular component 38a of Movable valve 38, and pressure P 1 (not shown) that be supplied to the ink in ink supply chamber 32 also is applied on the tabular component 38a.Therefore, shown in Figure 29 (a), tabular component 38a is resisted against on the containment member 41, makes Movable valve 38 be in the valve closing state.Be that valve unit 3 is in the self sealss state.
On the other hand, change to print state and consume under the situation of ink at record head 4, along with the minimizing of inks in the pressure chamber 34, film member 22 is towards sunk part 44 displacements, thereby the bearing plate 23 that is attached on it moves along the direction of the volume that reduces pressure chamber 34.At this moment, negative pressure keeps spring 40 to be compressed, and the core of bearing plate 23 is resisted against the end of the bar member 38b of Movable valve 38 by film member 22.
The W2 (not shown) is represented the spring load of negative pressure maintenance this moment spring 40, and the Wd (not shown) is represented the displacement reaction force corresponding to the displacement of film member 22.When record head 4 continues to consume ink, in pressure chamber 34, produce negative pressure P2.Concerning under the situation that P2＞W1+P1+Wd+W2 sets up, film member 22 catch bar member 38b, remove tabular component 38a to containment member 41 against, thereby Movable valve 38 becomes the valve open state shown in Figure 29 (b).
Therefore, the ink in the ink supply chamber 32 is added in the pressure chamber 34 by ink supply aperture 42 and is gone, and ink supply aperture 42 extends to pressure chamber 34 from ink supply chamber 32, and the ink stream that enters pressure chamber 34 has been eliminated the negative pressure in the pressure chamber 34.Therefore, Movable valve 38 moves, and is in the valve closing state shown in Figure 29 (a) once more, stop ink from ink supply chamber 32 to pressure chamber 34 replenish.
As mentioned above, negative pressure keeps spring 40 to be resisted against on the film member 22, pushes down bearing plate, and exerts pressure on the direction of the volume that increases pressure chamber 34.Even bearing plate 23 stands small acceleration/deceleration because of the reciprocating motion of for example balladeur train, bearing plate 23 is also motionless basically.These valve 38 contingent maloperations that can take in sail effectively.
In addition, negative pressure keeps spring 40 also to suppress the phenomenon that ink is assembled and film member 22 is further outwards expanded in the bottom of pressure chamber 34 because of its gravity effectively.That is, negative pressure keeps spring 40 chamber 34 that always keep-ups pressure to be in the slight negative pressure state, and it always plays and to remain on effect under the plumbness being attached to bearing plate 23 on the film member 22.The maloperation of this valve 38 that can take in sail effectively.
In addition, under ink was added to situation in the pressure chamber 34, negative pressure kept spring 40 elongations also to be in the effect of the state of slight negative pressure in the performance chamber 34 that keep-ups pressure, and can reduce the variation of pressure chamber 34 internal pressures.This can guarantee to discharge from record head the proper operation of ink droplet.
In addition, according to present embodiment, owing to keep the spring load of spring 40 and Packing spring 39 to be applied on the Movable valve from negative pressure, so guaranteed the negative pressure state of pressure chamber 34.In other words, spring load can keep spring 40 and Packing spring 39 to share by negative pressure.Select little spring load therefore might for Packing spring 39, Packing spring 39 is resisted against the Movable valve under the valve closing state 38 on the containment member 41.
Therefore, can be lowered on the containment member 41 that elastic resin etc. are made against pressure, thus make the improper distortion that might prevent containment member 41.Because can suppress containment member 41 is applied excessive spring load, so might avoid impurity, for example be included in the grease in the elastic resin that constitutes containment member 41, enter ink.
In the 3rd above-mentioned embodiment, size relationship is set in the following manner preferably: based on the contraction of the volume of pressure chamber, move under the maximum situation, keep spring to stay the space (stroke) that further to compress to negative pressure at Movable valve 38.Figure 30 shows this example, and amplifies demonstration near the core of ink supply valve unit.Figure 30 shows the contraction based on the volume of pressure chamber 34, and negative pressure keeps spring 40 distortion or the maximum situation of compression.
In Figure 30, L1 is illustrated in the solid height that Movable valve 38 is made the maximum situation lower seal spring 39 that moves, and L2 is illustrated in the compression height of negative pressure maintenance spring 40 under this state.Be that size relationship in the various piece is provided with as follows: even each circle part of Packing spring 39 is close to, negative pressure keeps each circle part of spring 40 to keep the non-state of being close to.In other words, when the spring member with same standard (size) was used as Packing spring 39 and negative pressure maintenance spring 40, the size of various piece was set in the mode that satisfies L1＜L2.Because described in this drawing mode is designed to the feed pressure chamber, gap 34 that ink keeps spring 40 by negative pressure, so if negative pressure keeps each circle part of spring to become to be close to, then the flow channel of ink is blocked, this may hinder the supply of ink.Therefore, can avoid this problem by setting L1＜L2 as mentioned above.
Use under the situation of ink supercharging feed system as shown in Figure 1 in the 3rd embodiment, for example, the slight open mode of Movable valve 38 can import pressure chamber 34 to ink, thus size setting as shown in figure 30 and unnecessary.But under the situation of using the system that utilizes the head difference ink supply as shown in Figure 2, ink supply pressure is less, so will need the big open state of Movable valve 38.Therefore, keep negative pressure the solid height of spring 40 to be provided with to such an extent that to have some surpluses with respect to the above-mentioned mobile stroke of Movable valve very important.
Ink supply valve unit according to the modification shown in Figure 31 (a) and 31 (b) then will be discussed, mainly be about with the difference part of the foregoing description.
In the modification shown in Figure 31 (a), though similarly helical spring is kept spring 40 as negative pressure, to compare with mode shown in Figure 29 (a), it is bigger that the diameter of circle is set up.This makes negative pressure keep spring 40 to be able to be resisted against near the periphery of making discoid bearing plate 23 by film member 22.
Because in this structure, bearing plate 23 is being resisted against near its periphery on the negative pressure maintenance spring 40, so spring 40 performances always remain on bearing plate 23 effect of plumbness.Even ink is owing to gravity accumulates in the bottom of pressure chamber 34, and cause film member 22 further outwards to expand, bearing plate 23 also is in plumbness.So maloperation of the valve 38 that can take in sail effectively.
In the modification shown in Figure 31 (b), when similarly helical spring being kept spring 40 as negative pressure, a plurality of helical spring 40a and 40b in this mode, have been used with less loop diameter.Each helical spring 40a and 40b arrange near the peripheral mode that is resisted against the bearing plate 23 that forms plate-like.Still in this structure, even ink is owing to gravity accumulates in the bottom of pressure chamber 34, and cause film member 22 further outwards to expand, each spring 40a and 40b play the effect that always bearing plate 23 is remained on plumbness.So maloperation of the valve 38 that can take in sail effectively.
Although in the modification shown in Figure 31 (b), used two helical spring 40a and 40b, also can use more helical spring.Therefore, under the situation of using the individual spring of integer (n),, need be set to W2/n from single helical spring spring load in order to keep the load of spring to be set to W2 from negative pressure.
In the modification shown in Figure 32 (a) and 32 (b), leaf spring 40A is used as negative pressure and keeps spring.Shown in Figure 32 (b), leaf spring 40A has two ends along same direction bending, constitutes a pair of leg part 40d and 40e.At the core of leaf spring 40A, formed and cut and folded part 40f, it is outstanding to the direction opposite with the bending direction of leg part 40d and 40e.
Shown in Figure 32 (a), the leg part 40d of leaf spring 40A is fixed on the cell enclosure 20 in pressure chamber 34, and another leg part 40e is resisted against on the inwall of pressure chamber 34.The bar member 38b of Movable valve is inserted through to form and cuts the also opening of folded part generation that 40f penetrates.The end portion of incision and folded part 40f is configured to roughly be resisted against by film member 22 core of bearing plate 23.
In this structure, leaf spring 40A is along the direction extrusion film member 22 of the volume that increases pressure chamber 34, and performance suppresses the effect of the maloperation of Movable valve 38 effectively, even valve 38 for example stands from the acceleration/deceleration due to the reciprocating motion of balladeur train.
To Figure 38 (a) and 38 (b) the 4th embodiment that has specifically implemented liquid injection device of the present invention is discussed below with reference to Figure 33.
As shown in figure 33, inkjet type printer (hereinafter referred to as printer) 121 as liquid injection device has framework 122 that roughly is parallelepiped-shaped and the paper feed member 123 that is installed on the framework 122, and paper is presented by unshowned paper feed mechanism on paper feed member 123.In addition, ways 124 is installed on the framework 122, and is parallel with paper feed member 123, and balladeur train 125 is supported on the ways 124 in the mode that can move along the axis direction of ways 124.Balladeur train 125 is by being with 127 to be connected to carriage motor 128 synchronously, and can reciprocally move along ways 124 under the driving of carriage motor 128.
Fluid jetting head or record head 129 are installed in balladeur train 125 that side towards paper feed member 123.Valve unit 131 is installed on the balladeur train 125, valve unit 131 liquid or ink feed to record head 129.In this embodiment and the color of ink (black ink B and cyan C, red M and the various color inks of yellow Y) corresponding, four valve unit 131B, 131C, 131M and 131Y are provided.
Unshowned nozzle outlet is located at the bottom of record head 129, and ink is supplied to record head 129 from valve unit 131B, 131C, 131M and 131Y under the driving of unshowned piezoelectric element, and ink droplet is directed onto on the paper and prints.
Right hand end at framework 122 has formed four print cartridge clampers 132.Print cartridge 133 as fluid storage device is releasably attached in each print cartridge clamper 132.In this embodiment, corresponding with the color of ink, be provided with four print cartridge 133B, 133C, 133M and 133Y.Each of four print cartridge 133B, 133C, 133M and 133Y comprises the unshowned ink packaging body that inside is in the shell 134 of airtight conditions and is provided with in the enclosure, and aforementioned black ink B and various color inks C, M and Y are respectively stored in the ink packaging body.
The ink packaging body of print cartridge 133 connects together by the pipeline 138 as the flexible liquid service duct with valve unit 131.In this embodiment and the color correspondence of ink, four pipeline 138B, 138C, 138M and 138Y are provided.
The cap seal device 141 that the nozzle of seal record 129 forms face is positioned at the non-print zone (original position) on the mobile route of print cartridge 125.In addition, use the cap seal member 141a of for example elastomeric material formation of rubber to be set on the upper surface of cap seal device 141, cap seal member 141a can form face with the nozzle that is sealing record head and closely contact, so that sealed-in nozzles forms face.Therefore, when print cartridge 125 moved to original position, cap seal device 141 upwards moved towards record head 129, and formed face with the nozzle of cap seal member 141a seal record 129, thereby prevented that nozzle opening from becoming dry.
Unshowned suction pump (tubing pump) is located at the bottom of cap seal member 141a.This suction pump is connected to the bottom of cap seal member 141a by suction channel.When this suction pump was driven, from being covered with the cap seal member 141a suction air of record head 129, this was from record head 129 suction airs and discharge, and in addition, Wiping member 142 is closed on the print zone one side setting of cap seal device 141.Wiping member 142 is to use elastomeric material, for example the rectangular tab made of rubber.Wiping member 142 moves on the mobile route of record head 129 as required, so that nozzle is formed the face wiped clean.
Shown in Figure 34 and 35, valve unit 131 has synthetic resin cell enclosure 145.Cell enclosure 145 has the shape of parallelepiped and the combination of semicolumn part.Coupling part 146 forms at the top section of cell enclosure 145, and pipeline 138 is connected to coupling part 146.It is 147 integrally formed in the bottom of cell enclosure 145 that ink lead-out is divided, and be connected to record head 129 by the connecting elements 125a of balladeur train 125.
Shown in Figure 34,36 and 38, the first side surface 145a in cell enclosure 145 has formed filter chamber sunk part 149, wherein keep filter 148, also forming cylindrical substantially dolly dimple part 150, the straight trough 151 that is communicated with dolly dimple part 150 and horizontally extending straight trough 152.In addition, cover the film member 153 of filter chamber sunk part 149, dolly dimple part 150 and groove 151, and the film member 154 of covering groove 152 is bonded to the first side surface 145a by hot adherence method.Therefore, filter chamber sunk part 149 and film member 153 have constituted filter chamber 155, and dolly dimple part 150 and film member 153 have constituted supply chamber 156, and groove 151 and film member 153 have constituted the first ink introduction channel 157.Groove 152 and film member 154 have constituted flow pass 158, and flow pass 158 and ink lead-in portion 147 communicate.
Shown in Figure 38 (a) and 38 (b), spring receiving member 159 is attached on the film member 153 and place with one heart in supply chamber 156 and be positioned at its inside, and spring receiving member 159 has the external diameter of the internal diameter that is slightly less than supply chamber 156.
Simultaneously, shown in Figure 35,37 and 38, roughly cylindrical big sunk part 161 and straight trough 162 form on the second side surface 145b of cell enclosure 145, and big sunk part 161 quilts and dolly dimple part 150 are provided with one heart.The peripheral wall part 161a of big sunk part 161 tilts in the mode that broadens towards opening.The diapire of big sunk part 161 has inclined surface 161b, inclined surface 161b is so that the mode that the degree of depth of big sunk part 161 upwards diminishes gradually tilts, in addition, the lowermost portion at big sunk part 161 has formed the through hole 152a that communicates with the groove 152 of the first side surface 145a.
The bearing plate 167 that roughly is plate-like is attached to that opposite side of film member 163 and pressure chamber 165.Bearing plate 167 has the external diameter less than the internal diameter of pressure chamber 165, and is arranged to pressure chamber 165 concentric.Bearing plate 167 usefulness form than film member 163 hard materials, and for example light plastic material is as polyethylene or polypropylene.Bearing plate 167 is by hot adherence method or use binding agent, two-sided tape etc. to be attached on the film member 163.As shown in figure 38, the spring 170 of extrusion film member 163 is located in the pressure chamber 165 in the mode of outside extrusion film member 163 and bearing plate 167.
Simultaneously, formed supported hole 169 in demarcation strip 168, demarcation strip 168 defines the aforementioned supply chamber 156 and the pressure chamber 165 of cell enclosure 145.Supported hole 169 and supply chamber 156 and pressure chamber 165 communicate.Movable valve 171 is supported in the supported hole 169 slidably.Movable valve 171 has the cylindrical rods part 171a that inserts in the supported hole 169 and roughly disk-shaped tabular component 171b, and tabular component 171b is bigger than the profile of supported hole 169.Bar part 171a and tabular component 171b are integrally formed.Describe this part in detail, bar part 171a is inserted into supported hole 169 and spring 170, so its end can be resisted against on the film member 163.Tabular component 171b is placed in the supply chamber 156.Circular seal member 172 as O shape ring, is fixed to supported hole 169 1 sides of tabular component 171b in the mode around supported hole 169.When the containment member 172 of tabular component 171b when demarcation strip 168 is removed, Movable valve 171 is connected to pressure chamber 165 to supply chamber 156, when containment member 172 is resisted against on the demarcation strip 168, it cover supported hole 169 around, and a supply chamber 156 disconnected each other with pressure chamber 165.In addition, on film member 153 1 sides of movable link 171, formed step part.One end of spiral spring 174 is contained on the step part, and the other end of spring 174 and aforementioned spring receiving member 159 engage.Therefore, spring 174 pushes Movable valve 171 to pressure chamber 165.
As shown in figure 37, supported hole 169 has four of equidistant arrangement and cuts the hole open, and roughly is cross generally.The bar part 171a of Movable valve 171 inserts supported hole 169, so bar part 171a and supported hole 169 have formed four ink channels 173.
The action of printer 121 then will be discussed, and printer 121 uses the valve unit 131 that constructs as mentioned above.
After having made printer 121, its performance is tested.In performance test, at first, versicolor print cartridge 133B, 133C, 133M and 133Y are clamped in the print cartridge clamper 132.Then, pressurized air is supplied to the shell 134 of each print cartridge 133B, 133C, 133M and 133Y by air supply pipe 136B, 136C, 136M and 136Y from booster pump 139, gives the supercharging of ink packaging body.Therefore, the various inks in the ink packaging body are under pressure.Then, behind cap seal member 141a covering record head 129, unshowned suction pump is driven.Therefore, ink is supplied to valve unit 131B, 131C, 131M and 131Y by pipeline 138B, 138C, 138M and 138Y.When the supply ink, filter chamber 155, the second ink introduction channel 166, the first ink introduction channel 157, supply chamber 156 and pressure chamber 165, and the air in the flow pass 158 is discharged from record head 129.At this moment, because the big sunk part 161 of pressure chamber 165 has the surperficial 161b of inclination at its top section, so the upper space of pressure chamber 165 has diminished, and film is with the warpage along the shape of pressure chamber, can raise at an easy rate negative pressure in the pressure chamber 165, thus make air discharge easilier.
When the unshowned nozzle of pipeline 138B, 138C, 138M and 138Y, valve unit 131B, 131C, 131M and 131Y and record head 129 was injected into ink, suction pump was shut down.Then,,, and containment member 172 is pressed on the demarcation strip 168, blocks ink channel 173 so it moves to pressure chamber 165 because Movable valve 171 pushed by spring 174.Therefore, Movable valve 171 becomes the valve closing state shown in Figure 38 (a).That is, supply chamber 156 and pressure chamber 165 enter non-connected state, and valve unit 131 enters the self sealss state.
After this, printer 121 is carried out test printing, is used for performance test.That is, printer 121 is according to unshowned test data, by printing in that the balladeur train among Figure 33 125 is sprayed ink fully from the record head 129 of balladeur train 125 left and when moving right.
When ink ejected from record head 129 during test printing, the ink in the pressure chamber 165 reduced, thereby pressure chamber 165 has negative pressure.Therefore, film member 163 is by to spring 170 bendings, and the center of film member 163 and bearing plate 167 are towards supply chamber 156 displacements.Crooked film member 163 pushes Movable valves 171 against the bar part 171a of spring 174 extruding Movable valves 171 towards supply chamber 156.When the Movable valve that is extruded moves to supply chamber 156, and containment member 172 separates with demarcation strip 168, and Movable valve 171 is placed in the valve open state shown in Figure 38 (b).That is, supply chamber 156 communicates by ink channel 173 and pressure chamber 165, and the ink feed pressure chamber 165 in the supply chamber 156, eliminates the negative pressure in the pressure chamber 165.Therefore, Movable valve 171 moves to pressure chamber 165 under the propulsive force effect of spring 174, and enters the valve closing state shown in Figure 38 (a) once more, thereby stops from supply chamber 156 to pressure chamber 165 supply inks.
During the printing of reality, Movable valve 171 switches between valve open state and the valve closing state without being everlasting, and film member 163 is maintained at poised state, and under this state, it is resisted against the end of the bar part 171a of Movable valve 171.It is to open Movable valve 171 slightly according to consumption of ink, and the mode that ink is fed to continuously pressure chamber 165 is worked.
That is, by opening/closing Movable valve 171, the variation of the ink pressure in the pressure chamber 165 is maintained in the predetermined scope, and changes irrelevant with the pressure of supplying the ink in the chamber 156.Therefore, even because the reciprocating motion of balladeur train 125, pipeline 138B, 138C, 138M and 138Y internal pressure change, and also can't apply its influence.The result has realized well from the ink feed of pressure chamber 165 to record head 129.
Remain under situation pressure chamber 165 at the initial back air that injects, when the environment (temperature) of placing printer changed (rising), air may expand, and might increase the interior pressure of pressure chamber 165.Because in this embodiment, spring 170 is outwards pushed film member 163 open absorb volume of air variation, so the pressure in the air chamber 165 can not rise.
When ink ejects from the record head 129 of printer 121 in this way, and performance test is when finishing, and ink packaging body and each print cartridge 133B, 133C, 133M and 133Y are separated.Then, balladeur train 125 moves on the upper surface of cap seal device 141, and, covering under the situation of record head with cap seal member 141a, unshowned suction pump is driven.This discharges ink by record head 129 from filter chamber 155, the second ink introduction channel 166, the first ink introduction channel 157, supply chamber 156, pressure chamber 165 and flow pass 158.Because liquid outlet E forms in the lowermost portion of pressure chamber 165, so this moment, ink was discharged swimmingly.
When the ink major part was discharged from, the cleaning liquid supply pipe was connected to print cartridge clamper 132, replaced each print cartridge 133B, 133C, 133M and 133Y.Then, cleaning solution is fed to pipeline 138B, 138C, 138M and 138Y, valve unit 131B, 131C, 131M and 131Y and record head 129 from the cleaning liquid supply pipe, clean.
The printer 121 of present embodiment can provide following effect:
(1) in the present embodiment and the lowermost portion of the pressure chamber 165 of liquid outlet E in the valve unit 131 of printer 121 that communicate of flow pass 158 form.Therefore, used ink is discharged swimmingly from record head 129 in the performance test of printer 121.Therefore might reduce the quantity of ink that remains in the valve unit 131, and improve liquid and discharge characteristic, thereby can reduce the number of times and the scavenging period of cleaning operation.
(2) in the present embodiment, the big sunk part 161 that forms the pressure chamber 165 of valve unit 131 has inclined surface 161b at its top, and the space of liquid outlet E top becomes less than the space below the liquid outlet E.Therefore, when initial the injection, film member 163 is with the warpage along the shape of pressure chamber 165, so can increase the negative pressure in the pressure chamber at an easy rate, this helps to discharge air, makes air be difficult to remain in the pressure chamber 165.
(3) in the present embodiment, the diameter of the peripheral wall part 161a of big sunk part 161 increases towards film member 163.Therefore be easy to process big sunk part 161.In addition, the area of film member 163 pressure-bearings can be done more, thereby can drive Movable valve 171 more reliably.
(4) in the present embodiment, the peripheral wall part 161a of big sunk part 161 tilts in the mode that increases its diameter towards film member 163.Therefore, film member 163 is with the warpage along with the shape of pressure chamber 165, so can increase the negative pressure in the pressure chamber at an easy rate, makes that to discharge air easier.
(5) in the present embodiment because spring 170 is placed in the pressure chamber 165, so film member 163 and bearing plate 167 can be pushed equably, so might prevent more reliably that film member 163 is by bending brokenly.Even there is air to remain in the pressure chamber 165 behind the injection ink, and the temperature of placing the part of printer rises, because spring 170 outwards pushes film member 163 open and absorb the volume that expands, so might prevent pressure rising in the pressure chamber 165.
To the 5th embodiment that has specifically implemented liquid injection apparatus of the present invention be discussed according to Figure 33 and Figure 39 to 41 below.Same label will be given with following each embodiment in the foregoing description in similar part, and will omit detailed description to them.Note, purpose for convenience, in Figure 39 and 40 (a), bearing plate 167 usefulness double dot dash lines are represented.
The printer 121 of present embodiment is represented as the double dot dash line among Figure 33, has the channel valve 175 of the flow channel that places pipeline 138.Channel valve 175 be fixed to print cartridge 133 on the framework 122 near, thereby can change the quantity of ink that in pipeline 138, flows.
The printer 121 of present embodiment has the valve unit 181 shown in Figure 39 and 40, rather than the valve unit 131 of the 4th embodiment, and valve unit is fixed on the balladeur train 125.Channel valve 175 is placed in upstream one side of valve unit 181.
Shown in Figure 39 and 40, valve unit 181 has the conical surface part 181b of the inclined surface 161b that replaces the 4th embodiment, and it makes big sunk part 161 shoal near the periphery towards big sunk part 161 supported hole 169.In valve unit 181, liquid outlet E forms on 40% position of the volume of pressure chamber 165, rather than in the lowermost portion of pressure chamber 165, and through hole 152a is connected to the there.In more detail, the generation type of liquid outlet E is: valve unit 181 is installed on the balladeur train 125, and the volume of pressure chamber 165 below the center line of the horizontal plane at the center by liquid outlet E becomes 40% of pressure chamber 165 volumes.
The method of the position that this liquid outlet E is set will be discussed below.
Provide liquid outlet E by the diverse location in pressure chamber 165, and carry out wash number and remain in the position that the emulation that concerns between the body (excess ink concentration) in the pressure chamber 165 is provided with liquid outlet E.This position by pressure chamber 165 below the center line C of liquid outlet E volume (volume of dashed area) and the ratio of the volume of pressure chamber 165 determine.It is noted that when valve unit 181 is installed on the printer liquid outlet E center line is a straight line that flatly extends.
Under the situation of cleaning, at first, the ink of the nozzle of having filled valve unit 181 and record head 129 is aspirated in the suction pump that drives cap seal device 141.Subsequently, identical with the 4th embodiment, the cleaning fluid supply pipe is connected to pipeline 138, and cleaning fluid is supplied to the nozzle of valve unit 181 and record head 129.Then, drive unshowned suction pump ink is discharged from record head 129, whole cleaning process is finished.
Figure 41 shows the relation between wash number and the excess ink concentration (ink that is comprised in the ink mixture of being discharged when cleaning and the ratio of cleaning fluid).Figure 41 shows the relation between the situation that channel valve 175 (valveless) is not provided and channel valve 175 (valve is arranged) is provided as in the present embodiment as among the 4th embodiment.
Do not providing under " valveless " situation of channel valve 175; the negative pressure that suction produced of suction pump causes cleaning fluid to be supplied to pressure chamber 165; till the face Hn (seeing Figure 41) that is up to the standard; at horizontal H n; liquid in the pressure chamber 165 becomes 50% of its volume; suction pump is shut down after that, and Movable valve 171 is closed.Therefore, in this case, when cleaning fluid injection pressure chamber 165, the face Hn that is up to the standard, and when the mixture of ink and cleaning fluid is discharged from, reached horizontal H in the lowest portion of liquid outlet E.
Providing under " valve is arranged " situation of channel valve 175, behind the discharge ink, under channel valve 175 pent situations, driving suction pump.At this moment, the bubble volume that remains in the pressure chamber 165 increases, and expands because of pressure descends.After this when channel valve 175 was opened, cleaning fluid entered suddenly, and was supplied to horizontal H a (seeing Figure 41), and horizontal H a approximately is 80% of pressure chamber 165 volumes, and when suction pump after that was shut down, Movable valve 171 was closed.Therefore, under the situation that has channel valve 175, since cleaning fluid injection pressure chamber 165, the face Ha that is up to the standard, and when the mixture of ink and cleaning fluid is discharged from, reached horizontal H.
General cleaning treatment is carried out 10 times or still less repeatedly.Excess ink concentration is equal to or less than 0.1%, even ink remains in a very long time in the nozzle of record head 129, this excess ink concentration also causes obstruction hardly.
Shown in the form among Figure 41, in printer 121, be provided with under the situation of channel valve 175, as present embodiment, if liquid outlet E be positioned at pressure chamber 165 volume 40% or still less (at the volume below the center line C of liquid outlet E be pressure chamber 165 volume 40% or still less) the position below, carry out cleaning for ten times and make that excess ink concentration approximately is 0.1% or still less.In printer 121, be not provided with under the situation of channel valve 175, as the 4th embodiment, if liquid outlet E be positioned at pressure chamber 165 volume 25% or still less (at the volume below the center line C of liquid outlet E be pressure chamber 165 volume 25% or still less) the position below, carry out cleaning for ten times and make that excess ink concentration approximately is 0.1% or still less.
Do not providing under " valveless " situation of channel valve 175, when liquid outlet E is positioned at 12% the position of volume of pressure chamber 165, cleaning the excess ink concentration that make for five times in the pressure chamber 165 and approximately be 0.1% or still less.Be provided with under " valve is arranged " situation of channel valve 175, cleaning the excess ink concentration that make for four times in the pressure chamber 165 and approximately be 0.1% or still less.That is, it is low more that liquid outlet E is provided with, and it is just fast more that ink is discharged, and guarantees 0.1% or body still less, in this concentration, even ink remains in a very long time in the nozzle of record head 129, also can not stop up.
Consider above-mentioned situation, in order to obtain 0.1% or still less excess ink concentration by normal 10 times or still less cleaning, the extreme higher position of liquid outlet E is 40% of a pressure chamber 165, in this concentration ink can not take place and stop up.Therefore, in the present embodiment, liquid outlet E is arranged on 40% the position of pressure chamber 165 volumes.
Identical with first embodiment, the printer 121 of present embodiment carries out performance test after assembling is finished.That is, with the same among first embodiment, the various inks that are pressurized are supplied to valve unit 131B, 131C, 131M and 131Y by pipeline 138B, 138C, 138M and 138Y from each print cartridge 181B, 181C, 181M and 181Y.As a result, the air in filter chamber 155, the second ink introduction channel 166, the first ink introduction channel 157, supply chamber 156, pressure chamber 165 and the flow pass 158 is discharged from record head 129.
When ink was supplied to the nozzle of pipeline 138, valve unit 181 and record head 129, channel valve 175 was closed, and balladeur train 125 is covered by cap seal member 141a, and suction pump is driven.Although this moment, Movable valve 171 made its containment member 172 separate with demarcation strip 168, this moment, it was opened, but channel valve 175 is closed, and makes channel valve 175 downstream areas (in record head 129 1 sides), and the pressure of for example supplying chamber 156 and pressure chamber 165 reduces significantly.The bubble that remains in the pressure chamber 165 causes volume to increase and expansion because of the pressure that descends.After this, when channel valve 175 was opened, ink poured in pressure chamber 165 quickly.Therefore, the bubble that has extended in pressure chamber 165 is discharged from together by liquid outlet E, flow pass 158 and record head 129 and ink stream.
When the ink major part was discharged from, each print cartridge 133B, 133C, 133M and 133Y separated with print cartridge clamper 132, and the cleaning fluid supply pipe is connected to pipeline 138 and carries out and clean then.Describe more specifically, under channel valve 175 pent situations, balladeur train 125 is covered by cap seal member 141a, and suction pump is driven reduces pressure significantly to pressure chamber 165.After this, channel valve 175 is opened, and cleaning fluid is imported the inside that pressure chamber 165 comes cleaning pressure chamber 165 quickly.Clean when this is repeated about 10 times and just finished.
Therefore, except with in above-mentioned the 4th embodiment (2) to (5) section described similar effects, this embodiment can also provide following effect:
(6) in this embodiment, valve unit 131 is located in the pipeline 138 in channel valve 175 downstreams, and liquid outlet E on gravity direction, be positioned at pressure chamber 165 volume 40% or still less locate.Therefore, by opening and closing channel valve 175 fully, ink is replenished swimmingly, so can clean to 0.1% or still less to excess ink concentration less than ten times wash number, in this concentration,, also can stop up hardly even ink remains in the nozzle of record head 129.Be that the liquid injection properties improves, and wash number can be reduced.
(7) in this embodiment, liquid outlet E is located at the position of the upstream of pressure chamber 165, promptly in 40% position of the volume of pressure chamber 165.That is, liquid outlet E is located at being less than ten cleanings, can provide 0.1% or the extreme higher position of excess ink concentration still less, in this excess ink concentration, even ink remains in the nozzle of record head 129, also can stop up hardly.The position of liquid outlet E is high more, and the injection properties of ink is good more, thus present embodiment to make that not only ink is discharged characteristic better, make that also the ink injection properties is better.That is, might make to remain in the pressure chamber 165 in that bubble is more difficult when valve unit 181 injects inks, print reliability like this and just descend hardly.
(8) in this embodiment, conical surface part 181b is located in the big sunk part 161.Conical surface part 181b makes big sunk part 161 shoal from the center of the big sunk part 161 of valve unit 181 or near the 161a of wall part to the periphery of supported hole 169.Therefore even Movable valve 171 is located at the center of pressure chamber 165, also can make at the pressure chamber 165 of liquid outlet E upstream forr a short time, and film member 163 is with the warpage along the shape of big sunk part 161.Like this, the negative pressure in the pressure chamber 165 is easy to be enhanced, and might improve the ink injection properties.
To describe as the 6th embodiment that has specifically implemented the printer 121 of liquid injection device of the present invention according to Figure 42 (a) and 42 (b) below.Figure 42 (a) and Figure 43 illustrate in order to describe easily purpose and have removed bearing plate 167.
The printer 121 of the 6th embodiment is furnished with the valve unit 191 shown in Figure 42 and 43, has replaced the valve unit 131 of the 4th embodiment.Valve unit 191 has the sunk part 192 that is located at below the big sunk part 161 as the volume augmenting portion, and this part and big sunk part 161 communicate.The mode that sunk part 192 forms is feasible: when valve unit 191 was installed on the balladeur train 125, the space below the liquid outlet E had bigger volume.The top section of sunk part 192 has become the surperficial 192a that tilts, and surperficial 192a tilts in the mode that the second side surface 145b, one side uprises.
Therefore, the printer 121 of the 6th embodiment has obtained the similar function among the 4th embodiment.In addition, except with in above-mentioned the 4th embodiment (2) to (5) and (7) section described similar effects, this embodiment can provide following effect:
(9) in the 6th embodiment, the volume that sunk part 192 increases pressure chamber 165 bottoms is set.That is, the volume on the top of pressure chamber 165 becomes less relatively.This can make the ink volume in the pressure chamber 165 bigger with respect to the surface area of the film member 163 that has formed pressure chamber 165, so, even do not use for a long time and take place under the situation of film member 163 permeate water or oxygen/nitrogen at printer 121, the increase of the viscosity of the ink in the pressure chamber 165 also can be reduced to minimum.That is,, also can carry out ink well and spray, and the reliability of height is provided for printer 121 even under the situation of using no for a long time printer 121.
(10) in the 6th embodiment, because the top section of sunk part 192 has become the surperficial 192a that tilts, surface 192a tilts in the mode that a side uprises of opening of big sunk part 161, so the residual bubbles in the sunk part 192 can be suppressed to greatest extent.
The the 4th to the 6th embodiment can make following modification.
Among superincumbent each embodiment, liquid outlet E is located among the peripheral wall part 161a of pressure chamber 165.Liquid outlet E not necessarily will be located among the peripheral wall part 161a, but can be located at the position at more close pressure chamber 165 centers, for example, and shown in the double dot dash line among Figure 40 (a).This can be used as liquid outlet E1.
Although in the 4th to the 6th embodiment, the shape of the big sunk part 161 of pressure chamber 165 is cylindrical basically, and it also can have other shapes.That is, the upper space of pressure chamber 165 is not necessarily leaveed no choice but tilt, and also can have the shape of elongation.The shape of the volume augmenting portion that forms in the lower space of pressure chamber 165 in addition, can be prismatic or taper.
Although be connected to the through hole 152a of the liquid outlet E of big sunk part 161 is that horizontal-extending ground forms, and shown in Figure 38 (a) and 38 (b) of the 4th to the 6th embodiment, it also can tilt with respect to horizontal direction, and is connected to outlet E.
In the 4th to the 6th embodiment, the cuboid that the shape of valve unit 131,181 and 191 cell enclosure 145 is not limited to be similar to.Be connected under the different situation of the angle of balladeur train 125 the position difference of liquid outlet E at identical shaped valve unit 131,181 and 191.When valve unit 131,181 and 191 was connected to balladeur train 125 uses, liquid outlet E was located at 25% or position still less of the volume of pressure chamber 165.Under the situation that is provided with channel valve 175, liquid outlet E is located at 40% or position still less of the volume of pressure chamber 165.
Describe in detail with reference to the accompanying drawings below and specifically implemented the seventh embodiment of the present invention.
Must, a large amount of ink of printer consumption of print image on the big page of A0 or similar size is so use the print cartridge of having stored a large amount of inks.When print cartridge was installed on the balladeur train, balladeur train became heavy and big load is applied to above it.Therefore, traditional large-scale printer as shown in Figure 53 has so-called disengaging balladeur train type structure, and wherein, versicolor print cartridge 271 is not mounted on the balladeur train that record head 272 is housed.
Ink is by each bar flexible pipe 274 (only showing one), from be supplied to the record head 272 of balladeur train 273 with each fixing print cartridge 271 of replaceable mode among Figure 53.Therefore, when the pressure in the pipeline 274 changed along with the motion of balladeur train 273, it influenced the discharge of ink, and made that the ink of discharging scheduled volume is very difficult.In this scheme, relief chamber (pressure dumper chamber) 275 is located between balladeur train 273 and the pipeline 274, and shown in Figure 54, and the height and position C of the outlet of print cartridge 271 always is configured to lower than the height and position N of the nozzle outlet of ink.
In this printer, the area E of balladeur train 273 belows shown in Figure 53 has become the zone of sending of print paper S.Change the ink in the print cartridge 271 for convenience during printing, print cartridge 271 is located at the side of sending area E of paper S.Therefore, the length of pipeline 274 need be equal to or greater than the Breadth Maximum of printable paper S, perhaps the maximum mobile width W of balladeur train 273.
Now, the length of the pressure loss of ink and pipeline 274 is proportional, and and the biquadratic of internal diameter be inversely proportional to.That is, under the situation that exhausted amount of ink increases along with the increase of multiinjector design and print speed, for ink from print cartridge 271 guided carriage 273 reliably, should do pipe diameter greatlyyer.This will increase the bending curvature of pipeline, thus will printer do compact having any problem.
The loss of the pressure by reducing to be applied to the liquid in the liquid retainer can be done the liquid injection device of present embodiment compactly.As shown in figure 44, the inkjet type printer (hereinafter referred to as printer) 210 as the liquid injection device of present embodiment has a pair of inverted T shape support 211 and 212.Below each support 211 and 212, be provided with a pair of castor 213, be used for moving of convenient printing machine.Support 211,212 is furnished with connecting rod 214 they is linked up, and the frame 215 of approximate parallelepiped-shaped is supported on the support.
Print cartridge retained part 220 is fixed on the central upper portion part of frame 215 outsides.Print cartridge 221,222,223 and 224 as the shades of colour (for example, cyan, redness, yellow and four kinds of colors of black) of liquid retainer is disposed in the print cartridge retained part 220 in the mode that can change from the front side.Particularly, a print cartridge 221-224 shape picture flat parallelepiped box, their maximum area part is arranged up and down, and each print cartridge 221-224 is arranged at grade.As shown in figure 45, the ink packaging body 225 of storage ink or liquid is comprised in each print cartridge 221-224.Outwards outstanding ink export mouth 221a, 222a, 223a and 224a is located at the center of the ink packaging body 225 of each print cartridge 221-224.The pin I that is located at as the end of the flexible pipe 226,227,228 of supply pipe and 229 is connected respectively to ink export mouth 221a, 222a, 223a and 224a.
As shown in figure 46, be with synchronously 233 and guide rod 234 be placed in the frame 215, synchronously with 233 on the pair of driving wheels 231 and driven pulley 232 of the right and left.Paper is put the lower central part that thereon platen 235 is disposed in frame 215.In addition, balladeur train 236 is arranged in platen 235 tops.Balladeur train 236 and guide rod 234 are connected and are directed, and are driven with being with 233 linkings synchronously.Therefore, balladeur train 236 is arranged in platen 235 tops, apart from platen 235 predetermined gaps, and can move along directions X.
As shown in figure 45, balladeur train 236 is furnished with record head 237, wherein is provided with a plurality of nozzles, is used to spray ink.Be located on the balladeur train 236 in the mode that is positioned on the record head 237 with each print cartridge 221-224 corresponding valve unit 241 to 244.Each valve unit 241 to 244 has identical structure, shown in Figure 45 to 47.In Figure 45, show the viewgraph of cross-section of valve unit 241 along the line 241-241 among Figure 47, show valve unit 242 and 243 viewgraph of cross-section, and show the viewgraph of cross-section of valve unit 244 along the line 244-244 among Figure 47 along the line 242-242 among Figure 48.
Shown in Figure 45,47 and 48, the usefulness that each valve unit 241-244 has a near cylindrical is the shell 245 that forms of hard synthetic resin for example.As shown in figure 47, near cylindrical sunk part 245a and two curved slot part 245b and 245c form on first side surface of shell 245.Entrance side film 248 is attached on first side surface of shell 245 in the mode that covers sunk part 245a and slot part 245b and 245c by hot adherence method.Therefore, sunk part 245a becomes supply chamber 250, and slot part 245b becomes and supply the service duct 251 that chamber 250 communicates, and slot part 245c becomes passing away 253.
As shown in figure 48, the sunk part 245d of near cylindrical is formed on second side surface of shell 245.Discharge side film 249 as driving body is attached on second side surface by hot adherence method, and therefore, sunk part 245d has constituted pressure chamber 252.
Through hole 245e and communication passage 253a are located at the central authorities of shell 245, and through hole 245e is used for supply chamber 250 and pressure chamber 252 are communicated with each other, and communication passage 253a communicates with each other pressure chamber 252 and passing away 253.
Also formed coupling part 246 in the shell 245 and ink lead-out divides 247, pipeline 226-229 is connected to coupling part 246, and ink lead-out divides 247 to be connected to record head 237.The tunnel-shaped pore-forming 246a that service duct 251 is connected to pipeline 226-229 forms in coupling part 246, forms and divide 247 in ink lead-out from the tunnel-shaped pore-forming 247a that passing away 253 extends to record head 237.
Therefore, the ink that arrives the tunnel-shaped pore-forming 246a of coupling part 246 from pipeline 226-229 is supplied to record head 237 by service duct 251, supply chamber 250, through hole 245e, pressure chamber 252, communication passage 253a, passing away 253 and tunnel-shaped pore-forming 247a.
As shown in figure 45, valve body 255 comprises bar part 255a and the disc portion 255b integrally formed with bar part 255a; Bar part 255a is inserted into through hole 245e, and disc portion 255b is placed in the supply chamber 250.One end of valve closing spring 257 is being pressed the back side of disc portion 255b, and the other end of valve closing spring 257 is being pressed spring base 258.Therefore, valve closing spring 257 pushes valve body 255 to discharging side film 249 (in the drawings to the right).Containment member 259 is fixed on supply chamber 250 1 sides (left-hand side among the figure) around through hole 245e.Therefore, in Figure 45, when valve closing spring 257 advanced valve body 255 to the right, the disc portion 255b of valve body 255 was crushed on the containment member 259, and through hole 245e (seeing the valve unit 242 among Figure 45) is blocked and closed to valve body 255.
Then, describe, the method for print cartridge retained part 220 with respect to the height H (mm) of the valve body 255 of valve unit 241-244 is set with reference to Figure 45,49 and 50.
When record head consumed ink, the pressure P v in the pressure chamber 252 equaled the release pressure Po of valve body 255.When release pressure Po was negative pressure, it had negative sign and is provided by following formula:
Pv＝-Po ...(1)
Release pressure Po should be greater than following pressure sum as shown in figure 49: the propulsive force Ke that is positioned at the valve closing spring 257 in supply chamber 250, the negative pressure that is positioned at pressure chamber 252 keeps the propulsive force Ko of spring 260, resistance fm when discharging 249 distortion of side film and be applied to the power Pc at the back side of the disc portion 255b of valve body 255 by elevation head H.Like this, release pressure Po is expressed from the next:
Po≥Ko+Ke+fm+Pc
Here, change with elevation head H owing to be applied to the power Pc of the disc portion 255b of valve body 255, so the pressure P v in the pressure chamber 252 changes shown in the dotted line dL among Figure 50.But, because the area of disc portion 255b is less, so it is little of ignoring to be applied to the power Pc of disc portion 255b.Therefore, even elevation head H is changed, big release pressure Po also can not be affected, and release pressure Po can be considered to be represented by the straight line L1 of Po=a (constant).
Pressure P k in the supply chamber 250 becomes the pressure loss Pt sum of elevation head H and pipeline 226-229, and elevation head H derives from the height from print cartridge retained part 220 to supply chamber 250.When pressure loss Pt was negative pressure, it had negative sign and is provided by following formula.
Pk＝-Pt+H ...(2)
Be under zero the situation at elevation head H, Pk=-Pt, and when elevation head H increases, the interior pressure P k variation in supply chamber 250 is shown in the straight line L2 among Figure 50.
Then, during consumption of ink, the supply chamber 250 interior pressure P k that represented by (2) formula are equal to or higher than under the situation of the pressure P v in the pressure chamber of being represented by (1) formula 252, and ink is fed to pressure chamber 252 sufficiently from supply chamber 250.That is,
Pk≥Pv＝-Pt+H≥-Po
And from following formula, the elevation head He that be fed to the ink of pressure chamber 252 from supply chamber 250 sufficiently is expressed from the next.
He≥-Po+Pt
Pressure P v when elevation head H changes in the pressure chamber 252 connects the line of straight line L1 and straight line L2 in by Figure 50 and represents.
Be provided with under the situation of H 〉=He, be used for printing even record head has consumed ink, ink still is fed to pressure chamber 252 sufficiently from supply chamber 250.Therefore, during pressure in adjusting pressure chamber 252, valve body 255 is opened/closes (self sealss), equals-Po so pressure chamber 252 interior pressure P v become, and has satisfied Pv=-Po.
Under the situation that is provided with of H＜He, when record head had consumed ink and is used to print, the ink feed from supply chamber 250 to pressure chamber 25 became not enough, in order to overcome it, allows valve body 255 always open, and ink is supplied to pressure chamber 252.In this case, the pressure P v in the pressure chamber 252 is expressed from the next: Pv=-Po-H.
Because the pressure P v in the pressure chamber 252 becomes the supply pressure to record head, so the smaller the better.In the present embodiment, the height H of print cartridge retained part 220 should be equal to or greater than He.
Then, the height H (mm) of print cartridge retained part 220 will be discussed with occurrence.For example, the pressure loss Pt that establishes from print cartridge 221-224 to the pipeline 226-229 that supplies chamber 250 is 150 (mmH
2O).At this moment, the elevation head He that be fed to the ink of pressure chamber 252 sufficiently from supply chamber 250 is expressed from the next.
He＝-100(mm?H
2O)+150(mm?H
2O)＝50(mm?H
2O)
Equate at release pressure Pv and pressure loss Pf, and for example pipeline 226-229 is done longlyer so that pressure loss Pt is increased to 200 (mm H
2O) under the situation, elevation head He uprises, and is 100 (mm H
2O), shown in the double dot dash line among Figure 50.
The action of the printer of present embodiment will be described below.
When using printer 210, the paper S on axle 219a is maintained in the paper feed part 219, and versicolor print cartridge 221-224 is clamped in the print cartridge retained part 220.The ink export mouth 221a of print cartridge 221-224 engages to 224a and pin I.
When unshowned connected computer receives print data, printer 210 is in store memory storage print data.Then, when carrying out the printing of print data, paper S is directed at shell 215 by unshowned paper-advance unit.When paper S arrived between platen 235 and the balladeur train 236, printer 210 was by moving balladeur train 236 along directions X, sprayed ink fully from the outlet of the record head 237 of balladeur train 236 simultaneously and printed.
More particularly, when ink by from record head 237 ejection the time, it is so much that the volume of the pressure chamber 252 of valve unit 241-244 has reduced the volume of ink of ejection, produced given negative pressure.This negative pressure becomes aforesaid release pressure Po.This negative pressure causes discharging side film 249 and keeps spring 260 (seeing the valve unit 243 among Figure 45) against valve closing spring 257 and negative pressure, is out of shape to approaching side film 248 directions.When discharging 249 distortion of side film, be fixed to the bearing plate 254 of discharging side film 249 and move and be resisted against on the valve body 255, valve body 255 is pushed away left.As a result, valve body 255 is moved to the left, and disc portion 255b separates with containment member 259, thereby supply chamber 250 and pressure chamber 252 communicate by through hole 245e, causes ink from supply 250 feed pressure chambeies 252, chamber.When ink feed pressure chamber 252, the negative pressure in the pressure chamber 252 are eliminated, and valve body 255 moves right under the propulsive force effect of valve closing spring 257 and is closed (seeing the valve unit 242 among Figure 45).
Each printer 210 of working as moves back and forth balladeur train 236 along directions X in the manner described above, and when spraying ink simultaneously, it drives unshowned paper feed mechanism paper S is moved to the bottom of printer 210.Then, it is carried out when repeating above-mentioned series operation and prints.
The printer 210 of present embodiment can provide following effect.
(a) in this embodiment, print cartridge 221 to 224 is moving areas of balladeur train 236, and is arranged on the top part of record head 237.When ink when under the effect of print cartridge 221 to 224 and the head difference of record head 237, being supplied to record head 237, do not need to provide ink-feeding device, for example booster pump.Because the length of pipeline 226-229 only needs to extend to from each ink export mouth 221a-224a the mobile range farthest of balladeur train 236, so can be so that ink feed is arrived the pipeline 226-229 of record head 237 than the weak point under the conventional situation.That is, owing to can make pressure loss littler, so, also can be fed to record head 237 to ink reliably even the height H from record head 237 to print cartridge 221-224 is done lowlyer.Therefore, the height H from record head 237 to print cartridge 221-224 can be set to lower than traditional, so can do printer 210 compactly
(b) in the present embodiment, valve unit 241-244 is located at the upstream side of the record head 237 of balladeur train 236, and valve unit 241-244 is closed when the pressure of supply in the chamber 250 is higher than pressure in the pressure chamber 252.Even print cartridge 221-224 is placed in the top of record head 237, ink can not leak from record head under pressure yet.Because the ink in the print cartridge 221-224 is supplied to record head 237 under the effect of 221 to 224 the head difference from record head 237 to print cartridge,, for example be used for the booster pump of ink feed to record head 237 so do not need to provide large-scale plant.This can make printer 210 littler.In addition, when print cartridge retained part 220 is located at the top part of balladeur train 236, even during print paper S is printing by situation about below balladeur train 236, sending under, also can carry out ink replacement at an easy rate.
(c) in the present embodiment, the height H from the valve body 255 of valve unit 241-244 to print cartridge retained part 220 be with from the pressure head of the pressure loss Pt of pipeline 226-229 and the elevation head that equates from the pressure head sum of the release pressure Po (negative pressure) of the valve body 255 of valve unit 241-244.Therefore, the ink in the print cartridge 221-224 can be fed to record head 237 reliably under the energy that height H produces.Therefore, ink can be sprayed swimmingly from record head 237.
(d) in the present embodiment, the height H from the valve body 255 of valve unit 241-244 to print cartridge retained part 220 be with from the pressure head of the pressure loss Pt of pipeline 226-229 and the elevation head that equates from the pressure head sum of the release pressure Po (negative pressure) of the valve body 255 of valve unit 241-244.That is, it has become the minimum altitude H that the ink that allows in the print cartridge 221-224 is fed to record head 237 reliably.Therefore might make printer 210 littler.
(e) in the present embodiment,, and kept flat, so the height dimension of inkjet type printer 210 can be done forr a short time because print cartridge 221-224 has been made into flat box body.
According to Figure 51 and Figure 52, will the 8th embodiment that has specifically implemented liquid injection device of the present invention be described.But it is noted that with give among following each embodiment those with the 7th embodiment similarly part and will omit detailed description with identical label to them.
Being disposed in as the print cartridge retained part 220 of the printer 210 of the liquid injection device of the 8th embodiment almost is center at printer 210, and clamps the print cartridge 221-224 of perpendicular elongate.
In addition, in this embodiment, press the following formula setting from the valve body 255 of valve unit 241-244 to the height H of print cartridge 221-224, wherein, d is the variation of the hydrostatic head in the ink packaging body 225 in print cartridge 221-224.
H＝He+d ...(3)
That is, the height H of the print cartridge retained part 220 in the present embodiment is taken the variation of the hydrostatic head in the print cartridge 221-224 that causes because of consumption of ink into account.
Therefore, in the printer 210 of present embodiment, print cartridge 221-224 also is clamped in the print cartridge retained part 220, and and pin I joint.And valve body 255 is in closed condition.When carrying out printing, printer 210 prints by spray inks from record head 237 when paper S being fed between platen 235 and the balladeur train 236, and moves balladeur train 236 along directions X, and is identical with the 7th embodiment.
When the ink in the print cartridge 221-224 after this was consumed, the hydrostatic head in the print cartridge 221-224 became negative pressure.Therefore, might be from supplying the ink feed deficiency of chamber 250 to pressure chamber 252, because the volumes in the pressure chamber 252 reduce the negative pressure that produced, reduced the pressure in the pressure chamber 252 widely, the minimizing of the volume in the pressure chamber 252 is the result of ink from the outlet ejection of the nozzle of record head 237.But height H in the present embodiment is set as the value that the elevation head He that equals the 7th embodiment adds the variation d of hydrostatic head, and the variation d of hydrostatic head is from the degree of depth of the ink in the print cartridge 221-224.Therefore, even the ink great majority in the print cartridge 221-224 all have been consumed, pressure in the supply chamber 250 still is higher than the pressure in the pressure chamber 252, so ink is fed to pressure chamber 252 sufficiently from supply chamber 250, thereby has kept the pressure in the pressure chamber fully.
Therefore, except with the (a) and (b) of previous embodiment with (d) the similar effects, this embodiment can also obtain following effect.
(f) in the present embodiment, print cartridge 221-224 is clamped in print cartridge retained part 220 with center that almost is arranged in printer 210 and the mode of flatly aliging.Therefore, can be set as approximately be half of mobile range of balladeur train 236 to the length that ink is fed to the pipeline 226-229 of each valve unit 241-244 from each print cartridge 221-224.Ink is supplied to balladeur train by pipeline 226-229, because pipeline 226-229 can be done shortlyer, thus can make pressure loss littler, and printer 210 is done compactlyer.
(g) in the present embodiment, height H is set as the value that handle is taken into account from the variation of the hydrostatic head of the degree of depth of the ink in the print cartridge 221-224.Therefore, even the ink great majority in the print cartridge 221-224 all have been consumed, the ink in the print cartridge 221-224 still can be fed to record head 237 swimmingly.
The the 7th and the 8th embodiment can be by following modification.
In above-mentioned each embodiment, negative pressure keeps spring 260 to be placed in the pressure chamber 252.In order to reduce cost etc., can to save negative pressure and keep spring 260.
In the 7th embodiment, established to such an extent that equal elevation head He from the valve body 255 of valve unit 241-244 to the height H of print cartridge 221-224, He is from the pressure head of the pressure loss Pt of pipeline 226-229 with from the pressure head sum of the release pressure Po (negative pressure) of the valve body 255 of valve unit 241-244.In the 8th embodiment, height H is made as and equals He+d.But the height H from the valve body 255 of valve unit 241-244 to print cartridge 221-224 does not need accurately to equal elevation head He, and only need be equal to or greater than elevation head He.Even in this case, the ink in the print cartridge 221-224 also can be fed to valve unit 241-244 more reliably.
In the 8th embodiment, the print cartridge retained part 220 of clamping print cartridge 221-224 is positioned at the center of frame 215.But print cartridge retained part 220 needn't be at the center of inkjet type printer 210, and only needs in the mobile range of balladeur train 236.Also be in this case, can make pipeline 226-229 shorter than traditional, thus pressure loss might be reduced, and help to make printer 210 compactnesses.
The description of each embodiment that provides has above provided the print cartridge 221-224 that keeps ink packaging body 225.As an alternative, also can use ink is stored in print cartridge 221-224 in the porous mass.
The 9th embodiment that has specifically implemented liquid injection device of the present invention is described according to Figure 55 to 61.Shown in Figure 55, externally have paper feed carriage 321 and go out paper carrier 322 as the printer 320 of liquid injection device, and inside has the body 323 of printing.Print body 323 and be furnished with platen 324 and unshowned paper feed mechanism.As object support, and when atomizing of liquids, paper P is placed on its upper surface platen 324 paper P.Paper feed mechanism is used for paper P is fed to platen 324 from paper feed carriage 321 by unshowned drive mechanism, and the paper P on the platen 324 is passed out to out in the paper carrier 322.
Driving wheel 326 and driven pulley 327 are fixed to by framework 325 and print on the body 323, and carriage motor 328 is connected on the driving wheel 326.Be with synchronously 329 around this on belt pulley 326 and 327, and the balladeur train 330 that is positioned at platen 324 tops is fixed to synchronously and is with on 329.Balladeur train 330 can slide along guide rod 331, and guide rod 331 is suspended on the framework 325.Therefore, balladeur train 330 moves along main scanning direction X by being with 329 synchronously under the driving of carriage motor 328.
In addition, four valve units 335 are installed in the top section of balladeur train 330, four as the print cartridge 336 of liquid retainer by and each valve unit 335 be connected and supported.Each print cartridge 336 keeps black, redness, cyan and yellow various ink.
In Figure 55, wiper mechanism 337 is arranged on the right hand end of printer 320.Wiper mechanism 337 have the lid 338 that covers record head 332 and with the lid 338 unshowned suction pumps that communicate.When suction pump is driven, when lid 338 covered record head 332, ink and bubble etc. was discharged from.
Then, the valve unit 335 of balladeur train 330 will be described with reference to the accompanying drawings in detail.Figure 56 and 57 shows balladeur train 330 and the print cartridge 336 that is installed on the balladeur train 330, and one of them print cartridge 336 is removed.
Shown in Figure 56 to 59 (a) and 59 (b), valve unit 335 has a plurality of synthetic resin cell enclosure 340.Each cell enclosure 340 is made into flat box body, the step part 341 that has half-cylindrical part and form at its top.Supply pin 342 projects upwards formation on the step part 341 of each cell enclosure 340.Each supply pin 342 forms cylindrical and has inner chamber 342a.Two supply orifice 342b respect to one another are located at the outer surface top of each supply pin 342.When supply pin 342 was packed print cartridge 336 into, liquid was supplied to valve unit 335 from print cartridge 336 by inner chamber 342a and supply orifice 342b.In addition, outstanding downwards ink lead-out is divided integrally formed in the bottom of each cell enclosure 340.Ink lead-out divides the 343 coupling part 330a by balladeur train 330 to be connected to record head 332.
Shown in Figure 56,58 (a) and 58 (b) and 60 (a) and 60 (b), the dolly dimple part 345 of approximate column and the approximate straight trough 346 that communicates with dolly dimple part 345 form in the first side surface 340a of cell enclosure 340.The film member 347 that covers dolly dimple part 345 and groove 346 is attached to the first side surface 340a by heat.Therefore, dolly dimple part 345 and film member 347 have formed supply chamber 348, and groove 346 and film member 347 have formed ink lead-in portion 349.The intercommunicating pore h that is connected to the inner chamber 342a of supply pin 342 is located in the end of groove 346.Therefore, the ink that has imported from supply pin 342 is imported into supply chamber 348 by intercommunicating pore h and ink lead-in portion 349.Film member 347 usefulness are in the character that chemically influences ink, and have the material of low permeability rate and the saturating nitrogen rate of low oxygen flow to make.Therefore, in this embodiment, film member 347 by for example have adhere to and lamination the density polyethylene film with high of the nylon film that applies of vinylidene chloride (saran) or the film of polypropylene film make.
Shown in Figure 60, to be connected to film member 347 with the supply chamber 348 concentric modes that are provided with, spring receiving member 350 has the external diameter of the internal diameter that is slightly less than supply chamber 348 to spring receiving member 350 in supply chamber 348.Spring receiving member 350 can be attached on the film member 347 by heat in advance, perhaps also can be pasted thereon with binding agent, two-sided tape etc.In addition and the spring member S that is connected of spring receiving member 350 in supply chamber 348, be in compressive state.
Shown in Figure 57,59 (a) and 59 (b) and 60 (a) and 60 (b) and the big sunk part 351 of the near cylindrical that are provided with one heart of dolly dimple part 345 in the second side surface 340b of cell enclosure 340, form.Big sunk part 351 has peripheral wall part 351a, and outer wall section 351a tilts in the mode that increases its diameter towards opening.Outlet opening 352 is located at the bottom of big sunk part 351, ink lead-out divide 343 directly over.Outlet opening 352 and ink lead-out divide 343 derivation passage 343a to communicate.As the driving body that covers big sunk part 351, film member 353 is attached on the second side surface 340b of cell enclosure 340 by heat.Therefore, big sunk part 351 and film member 353 have formed pressure chamber 354.Film member 353 usefulness and film member 347 identical materials constitute.
That side opposite that the bearing plate 355 of approximate plate-like is attached to film member 353 with pressure chamber 354.Bearing plate 355 has the little external diameter of internal diameter in specific pressure chamber 354, and arranges with one heart with pressure chamber 354.Bearing plate 355 usefulness form than film member 353 hard materials, and for example light plastic material is such as polyethylene or polypropylene.Bearing plate 355 is attached on the film member 353 with hot adherence method or use binding agent, two-sided tape etc.
Shown in Figure 60 (a) and 60 (b), the supported hole 358 that is communicated with supply chamber 348 and pressure chamber 354 forms in demarcation strip 357, and demarcation strip 357 defines the supply chamber 348 and the pressure chamber 354 of cell enclosure 340.The Movable valve 359 that has constituted on/off valve is supported in the supported hole 358 slidably.Movable valve 359 is made of cylindrical rod part 359a and the tabular component 359b integral body of inserting supported hole 358, and tabular component 359b has the approximate dish type greater than the profile of supported hole 358.More specifically describe, bar part 359a is inserted into supported hole 358, and its end can be resisted against on the film member 353.The tabular component 359b of Movable valve 359 is positioned at supply chamber 348, and is pushed along the R direction among Figure 60 (a) and 60 (b) by spring member S.In addition, annular seal member 360 is fixed on supply chamber 348 1 sides of demarcation strip 357 in the mode around supported hole 358.Containment member 360 usefulness elastomer resins etc. for example form O ring etc.Shown in Figure 61, supported hole 358 have four uniformly-spaced arrange cut groove open, cut groove open and roughly be cross on the whole.So when the bar part 359a of Movable valve 359 was inserted supported hole 358, bar part 359a and supported hole 358 had formed four ink channels 361.
Therefore, Movable valve 359 generally is in the position shown in Figure 60 (a) under the propulsive force effect of spring member S, and its tabular component 359b is crushed on the containment member 360, covers around the supported hole 358, and supply chamber 348 and pressure chamber 354 are separated.That is, Movable valve is in the valve closing state.When Movable valve 359 moves along the L direction among Figure 60 (a) and 60 (b), and tabular component 359b is from the containment member 360 of demarcation strip 357 separately the time, supply chamber 348 and pressure chamber 354 by ink channel 361 with communicate with each other.At this moment, Movable valve 359 becomes the valve open state.Then, the ink that is fed to pressure chamber 354 is imported into ink lead-out by outlet opening 352 and divides 343 derivation passage 343a, and is supplied to record head 332 by deriving passage 343a.
Then, will print cartridge 336 be described with reference to Figure 56 to 59 (a) and 59 (b).Shown in Figure 56 to 59 (a) and 59 (b), print cartridge 336 is approximate parallelepiped-shaped, and comprises main body 371 and lid member 372.
The spring member 377 that constitutes the valve body 376 of valve mechanism and constituted valve mechanism equally is placed among the small diameter portion 375a of stepped hole 375.Valve body 376 is approximate dish types, and its central upper portion partly projects upwards, and the spring member 377 of formation valve mechanism is loaded into this central upper portion part.Spring member 377 is pressed between the upper end of valve body 376 and stepped hole 375 regularly, and to pressing down valve body 376.When supply pin 342 was inserted into supply section 374, valve body 376 against the propulsive force of spring member 377, was supplied pin 342 and moves in the upper end that stops the inner chamber 342a that supplies pin 342, upwards pressed.
As Figure 58 (a) and 58 (b), and shown in 59 (a) and 59 (b), in the top of main body 371, formed the sunk part of upwards opening 380.When sunk part 380 is covered member 372 coverings by usefulness, limit holding chamber 381 as the liquid retaining part.The ink of cyan, redness, yellow and black is remained on respectively in the holding chamber 381 of each print cartridge 336.The lower surface of sunk part 380 tilts towards supply port 380a, and supply port 380a is connected to stepped hole 375 to sunk part 380.Therefore, remain in the holding chamber 381 ink since the effect of gravity be collected in the supply port 380a along lower surface.
As shown in Figure 56, the connectivity slot 384 that in lid member 372, has formed through hole 383 and communicated with through hole 383.Passage forms film 385 and is adhered to the upper surface that covers member 372.Passage forms film 385 and covers through hole 383 and connectivity slot 384, but does not cover an end 384a of connectivity slot 384.Therefore, holding chamber 381 can communicate with atmosphere by through hole 383 and connectivity slot 384, so even ink is discharged from holding chamber 381, the inside of holding chamber 381 can not become negative pressure yet.
The action of the printer 320 of present embodiment is described below.
Before using printer 320, the user inserts the supply pin 342 of each valve unit 335 of balladeur train 330 in the supply section 374 of each print cartridge 336, and each print cartridge 336 is installed on the balladeur train 330.Before print cartridge 336 was installed on the balladeur train 330, valve body 376 was crushed on the supply port 380a that seals holding chamber 381 on the containment member 378, thereby the ink in the holding chamber 381 can not let out.
When supply pin 342 was inserted in the supply section 374 of print cartridge 336, shown in Figure 58 (b), supply pin 342 was crushed on the containment member 378, and in the sealing that keeps supply port 380a valve body 376 is upwards pushed away.Therefore, the ink in holding chamber 381 and the stepped hole 375 is supplied to supply chamber 348 by inner chamber 342a, intercommunicating pore h and the ink lead-in portion 349 of supply orifice 342b and supply pin 342.Because this moment, holding chamber 381 communicated with atmosphere by the connectivity slot 384 of through hole 383 and lid member 372, so do not become negative pressure in the holding chamber 381, ink is fed to supply chamber 348 swimmingly.
In addition, during this time, the unshowned suction pump of wiper mechanism 337 is activated, and the air in the pressure chamber 354 is discharged from.In pressure chamber 354, correspondingly produced negative pressure, thus film member 353 and bearing plate 355 by lateral displacement to reduce the volume of pressure chamber 354, be positioned at the position shown in Figure 60 (b).Therefore, film member 353 and bearing plate 355 push away and mobile Movable valve 359 along the L direction, thereby tabular component 359b and containment member 360 are separated.This has opened Movable valve 359, thus supply chamber 348 and pressure chamber 354 by ink channel 361 with communicate with each other.Therefore, the ink that is fed to supply pin 342 from the holding chamber 381 of print cartridge 336 is supplied to pressure chamber 354.
When pressure chamber 354 was full of ink, the pressure of the ink in the supply chamber 348 and the propulsive force of spring member S acted on the Movable valve 359, thereby Movable valve 359 is pushed away and moves in the direction by the R direction in Figure 60 (a) and 60 (b).The pressure of the ink in the supply chamber 348 is the pressure that the elevation head by the ink in the holding chamber 381 of print cartridge 336 causes.Therefore, tabular component 359b is crushed on the containment member 360, closes Movable valve 359, shown in Figure 60 (a).Like this, supply chamber 348 and pressure chamber 354 are disconnected each other, stop ink being fed to pressure chamber 354 from supply chamber 348.
After this when printer 320 became print state, unshowned paper feed mechanism was driven, and was used for the paper P on the paper feed carriage 321 is fed between balladeur train 330 and the platen 324.When paper P arrived between balladeur train 330 and the platen 324, the unshowned piezoelectric element of carriage motor 328 and record 332 was driven.As a result, when X oppositely moved back and forth, ink was sprayed from record head 332 towards paper P at balladeur train 330.
When ink by from record head 332 ejection the time, the ink in the pressure chamber 354 is along with emitted dose reduces.Suppose that the pressure in the supply chamber 348 is P1, the propulsive force of spring member S is W1, and displacement film member 353 required displacement reaction forces are Wd, and the negative pressure of the ink in the pressure chamber 354 is P2, is satisfying following relationship
Under the situation of P2＞P1+Wd+W1, film member 353 is bent along the L direction, thereby moves Movable valve 359 along the L direction.Therefore, Movable valve 359 separates with containment member 360, shown in Figure 60 (b), and is opened, and supply chamber 348 and pressure chamber 354 are communicated with, and ink is supplied to pressure chamber 354 from supply chamber 348 by ink channel 361.
When ink is supplied to pressure chamber 354 from supply chamber 348, and the ink of pressure chamber 354 internal consumptions is when obtaining replenishing, and the negative pressure in the pressure chamber 354 are reduced.The result, Movable valve 359 moves along the R direction, and be closed under the propulsive force effect of pressure in supply chamber 348 and spring member S, pressure in the supply chamber 348 and the propulsive force of spring member S are applied on the tabular component 359b, thereby supply chamber 348 and pressure chamber 354 are disconnected.
Under the situation of after this changing print cartridge 336, print cartridge 336 is upwards removed from valve unit 335.Then, the valve body 376 of print cartridge 336 is promoted and moves down by spring member 377, and is resisted against on the containment member 378, thereby has sealed supply port 380a.Therefore, used print cartridge 336 is removed from balladeur train 330, and not from stepped hole 375 and holding chamber 381 internal leakage inks.
The printer 320 of present embodiment can provide following effect.
(1) in the 9th embodiment, valve unit 335 is located between the holding chamber 381 and record head 332 of print cartridge 336.When producing negative pressure in the pressure chamber 354 that communicates with record head, valve unit 335 causes Movable valve 359 to carry out the valve open operation, thereby is communicated with the supply chamber 348 of holding chamber 381 1 sides and the pressure chamber 354 of record head 332 1 sides.
When Movable valve 359 was in the valve closing state, the pressure of ink was not passed to pressure chamber in the holding chamber 381.Therefore, ink lets out from record head 332 hardly.Along with ink sprays from record head 332, Movable valve 359 is opened, and ink is supplied to pressure chamber 354 from supply chamber 348.This makes need not keep a porous mass in holding chamber 381.Therefore might keep more inks holding chamber 381 in, the amount of increase is the not amount of maintained porous mass of general, and the delay of the ink feed that causes because of porous mass can not take place.
In addition, because porous mass is not maintained in the holding chamber 381, the part of porous mass is not sneaked into and will be fed to the ink of record head 332 from print cartridge 336 as impurity.Therefore the filter that is used to remove impurity need not be placed between print cartridge 336 and record head 332, so the quantity of part can reduce.
(2) in the 9th embodiment, print cartridge 336 is located on the supply chamber 348 of valve unit 335.Therefore, the inks that remain in the holding chamber 381 of print cartridge 336 are supplied to supply chamber 348 under the pressure effect from this elevation head.Therefore, need not provide any device, just the ink in the holding chamber 381 is supplied to supply chamber 348 to the ink supercharging.As a result, utilize simple structure, the ink feed in the holding chamber 381 is arrived supply chamber 348.
(3) in the 9th embodiment, valve unit 335 and balladeur train 330 are an integral body.Valve unit 335 with holding chamber 381 can be removed from record head 332.When the ink in the holding chamber 381 is consumed and will change it with new print cartridge 336, need only changes print cartridge 336, and need not change valve unit 335.That is, because only need change a spot of part, so can be with material and the lower print cartridge 336 that becomes original manufacturing to be replaced still less.
(4) in the 9th embodiment, print cartridge 336 is provided with supply section 374, and supply section 374 has stepped hole 375.Valve body 376 is placed in the stepped hole 375, and when supply pin 342 was inserted into, valve body 376 moved and opens, and when supply pin 342 was pulled out, valve body 376 was crushed on the containment member 378.In case after being installed on the balladeur train 330, even print cartridge 336 was removed, also hardly ink leakage can take place before all inks are used up.If the supply pin 342 of valve unit 335 is inserted into the supply section 374 of the print cartridge 336 that is used to half, the ink in the holding chamber 381 can be supplied to valve unit 335.Therefore, even print cartridge 336 is removed when having used half, ink also can be used effectively.
(5) in the 9th embodiment, when ink be directed onto that paper P goes up and pressure chamber 354 in ink when being reduced, film member 353 is along the L direction among Figure 60, is bent and is shifted in the mode of the volume that reduces pressure chamber 354.When film member 353 when the L direction is shifted, Movable valve 359 is opened, supply chamber 348 and pressure chamber 354 are by ink channel 361 and communicate with each other.Therefore, according to the quantity of ink that consumes, ink is added to pressure chamber 354.At this moment, according to the quantity of ink that record head 332 is consumed, ink is added to pressure chamber 354, and and to be fed to the pressure independent of ink in the supply chamber 348 of valve unit 335 by holding chamber 381 from print cartridge 336.
(6) in the 9th embodiment, the bottom of holding chamber 381 tilts in the mode to stepped hole 375 or supply port 380a convergence.Therefore, the ink in the holding chamber 381 of print cartridge 336 accumulates among the supply port 380a because of the effect of gravity.Therefore, even the ink in the holding chamber 381 tails off, ink also by supply port 380a, is fed to supply chamber 348 with not stayed more reliably, so the ink in the holding chamber 381 can all be used effectively.
(7) in the 9th embodiment, the connectivity slot 384 that holding chamber 381 is passed through to form in through hole 383 and the lid member 372 is to atmosphere opening.Even the ink in the holding chamber 381 is supplied to record head 332 by supply chamber 348 and pressure chamber 354, and is consumed by the injection from record head 332, the inside of pressure chamber 381 does not become negative pressure yet.Therefore might be fed to pressure chamber 354 to ink swimmingly from holding chamber 381, and ink is suitably sprayed from record head 332.
(8) in the 9th embodiment, the supply pin 342 of valve unit 335 is located on the step part 341 of valve unit 335.Therefore, even the supply section 374 of print cartridge 336 is installed on the supply pin 342, the height of balladeur train 330 also can be done as far as possible for a short time.That is, can be so that printer 320 is littler.
According to Figure 62 to 66 (a) and 66 (b), will the tenth embodiment that has specifically implemented liquid injection device of the present invention be discussed.The tenth embodiment has only revised the print cartridge 336 and the balladeur train 330 of the printer 320 of the 9th embodiment.Therefore, same label will be given with present embodiment in the foregoing description in similar part, and will omit detailed description to them.
Figure 62 and 63 illustrates according to balladeur train according to the present invention 388 and will be installed in print cartridge 390 on the balladeur train 388, one of them print cartridge 390 split except.
Shown in Figure 62 and 63, four cylindrical supply pins 342 (only showing two) are located on the top of coupling part 330a of balladeur train 388 of the tenth embodiment.Each supply pin 342 has two supply orifice 342b respect to one another, and inner chamber 342a and supply orifice 342a communicate, and are used for ink is led coupling part 330a, and be the same with the 9th embodiment.
In the tenth embodiment, similarly be installed on the balladeur train 388 in the mode of the supply pin 342 that is loaded into each balladeur train 388 as four print cartridges 390 of liquid retainer.Each print cartridge 390 is as the holding chamber 381 of liquid retaining part and the combination of valve unit 335, and comprises print cartridge shell 391 and lid member 372.
Each print cartridge shell 391 is formed flat parallelepiped shape.Form ink lead-out highlightedly in the bottom of each print cartridge shell 391 and divided 393.Ink lead-out is divided the 393 supply section 374 similar structures that have with first embodiment, has formed stepped hole 375 there, and shown in Figure 66 (a) and 66 (b), supply pin 342 is inserted into stepped hole 375.That is, valve body 376 and spring member 377 are maintained at the small diameter portion 375a of stepped hole 375, and containment member 378 is maintained in the major diameter part 375b.Therefore, when shown in Figure 66 (a), the supply pin is inserted into ink lead-out when dividing the containment member 378 of 393 stepped hole 375 in sealed, and print cartridge shell 391 is installed on the balladeur train 388.
Shown in Figure 62 and 64, in the first side surface 391a of print cartridge shell 391, formed dolly dimple part 345, the film member 347 that covers dolly dimple part 345 is attached on first side surface by heat.Therefore, dolly dimple part 345 and film member 347 have formed supply chamber 348.Shown in Figure 66 (a) and 66 (b), spring receiving member 350 and spring member S are placed in the supply chamber 348.
Shown in Figure 63 and 65, in the second side surface 391b of print cartridge shell 391, formed the big sunk part 351 concentric with dolly dimple part 345, the film member 353 that covers big sunk part 351 is attached on second side surface by heat.Therefore, big sunk part 351 and film member 353 have formed pressure chamber 354.The outlet opening 352 that divides 393 stepped hole 375 to communicate with ink lead-out forms in big sunk part 351.Film member 353 is furnished with bearing plate 355, and is identical with the 9th embodiment.
In addition, formed supported hole 358 in demarcation strip 357, demarcation strip 357 defines supply chamber 348 and pressure chamber 354, and Movable valve 359 is inserted in the supported hole 358.The bar part 359a of Movable valve 359 can be resisted against on the film member 353.The tabular component 359b of Movable valve 359 is by the right side extruding of spring member S in Figure 66 (a) and 66 (b).In addition, containment member 360 is located at supply chamber 348 1 sides of demarcation strip 357.
Shown in Figure 66 (a) and 66 (b), in the top of print cartridge shell 391, formed sunk part 395.The width of the bottom 395b of sunk part 395 is narrower than top 395a.The intercommunicating pore 397 that communicates with supply chamber 348 is formed centrally in the 395b of bottom.The bottom of sunk part 395 tilts to intercommunicating pore 397 in the mode of assembling to intercommunicating pore 397.Therefore, the ink that remains in the holding chamber 381 accumulates in the intercommunicating pore 397 under the gravity effect.
When sunk part 395 tegmentum members 372 cover, limit holding chamber 381 as the liquid retaining part.The ink of cyan, redness, yellow and black is remained on respectively in the holding chamber 381 of each print cartridge 390.Through hole (not shown) and the connectivity slot 384 (seeing Figure 66 (a) and 66 (b)) that communicates with it form in lid member 372, and be identical with the 9th embodiment.Passage forms film 385 and is bonded to and cover on the member, so connectivity slot 384 and through hole are covered by passage formation film 385, but does not cover an end 384a of connectivity slot 384.
Therefore, the balladeur train 388 of the tenth embodiment is to work with the similar mode of the 9th embodiment.Particularly, the pressure from the head difference of the ink in the holding chamber 381 always acts on the supply chamber 348.Therefore, Movable valve 359 is always moved by the right side in Figure 66 (a) and 66 (b), is resisted against on the containment member 360, and is closed by the pressure of the ink in the propulsive force of spring member S and the supply chamber 348, thereby supply chamber 348 and pressure chamber 354 are disconnected.When ink was sprayed onto on the paper P from record head 332, the quantity of ink in the pressure chamber 354 reduced, and this has produced negative pressure in pressure chamber 354.This film member 353 and bearing plate 355 are along the volume that reduces pressure chamber 354, or the direction left among Figure 66 (a) and 66 (b) moves.Therefore, Movable valve 359 is pushed away left by film member 353, breaks away from film member 360 and opens.Therefore, ink is supplied to pressure chamber 354 from supply chamber 348 by ink channel 361.The ink that remains in the holding chamber 381 of present embodiment is supplied to supply chamber 348 by intercommunicating pore 397, and ink is supplied to pressure chamber 354 from supply chamber 348 by ink channel 361.
Arrive (7) except effect (1), (2) and (5) of the 9th embodiment, the printer of the tenth embodiment can also provide following effect.
(9) in the print cartridge 390 of the tenth embodiment, valve unit 335 and holding chamber 381 form as one, and print cartridge 390 with respect to balladeur train 388 can connect, dismountable.Therefore can be installed to valve unit 335 on the traditional balladeur train 388 that does not have mounted valve unit 335 at an easy rate, so, the print cartridge 390 that more effectively uses ink can be connected.
If the ink that remains in the holding chamber 381 is all used up, then print cartridge quilt and valve unit are changed together.That is, because use valve unit when only the ink in remaining on the liquid retaining part is consumed, so it does not need to bear the rigidity of long-term use.Therefore, can more freely select material, and can make the liquid retainer originally with lower one-tenth.The part of porous mass in addition, in print cartridge 390, do not keep porous mass, so can not sneaked into ink as impurity.Therefore the filter that is used to remove impurity need not be placed between print cartridge 390 and record head 332, so the quantity of part can reduce.
(10) in the tenth embodiment, the ink lead-out with stepped hole 375 divides 393 to be located on the valve unit 335.Supply pin 342 is inserted in the stepped hole 375, open shown in Figure 66 (a), and after supply pin 342 was pulled out, shown in Figure 66 (b), valve body 376 is being pressed containment member 378.In case after being installed on the balladeur train 388, even print cartridge 390 is removed before all using up at ink, the ink that is kept also leaks hardly.
When the supply pin 342 of balladeur train 388 is inserted into the supply section 374 of the print cartridge 390 that is used to half, the inks in the valve unit 335 are supplied to ink lead-out and divide 393.Even print cartridge 390 is removed when it has been used half, the ink that remains in the print cartridge 390 also can be used effectively.
The the 9th and the tenth embodiment can be modified as follows.
In the 9th and the tenth embodiment, the holding chamber 381 of print cartridge 336,390 is located on the supply chamber 348 of valve unit 335.As an alternative, can be provided with along the holding chamber 381 of laterally also extending downwards in supply chamber 348.
In the 9th and the tenth embodiment, when supply pin 342 was inserted in the stepped hole 375, print cartridge 336,390 was installed on the balladeur train 330,388.As an alternative, print cartridge 336,390 is being supported on the balladeur train 330 by other bracing or strutting arrangement.In this case, done more even be arranged in the volume of the holding chamber 381 of top part, balladeur train 330,388 also can move with being stabilized.
In the 9th and the tenth embodiment, ink lead-out divide 343,393 from shell 340,391 to lower process.Those ink lead- out divide 343 and 393 can be formed not from shell 340 and 391 projections.Shell 340 and 391 shape can at random be selected.
Industrial applicability
As mentioned above, liquid injection device according to the present invention is suitable for the printer (bag at the ejection ink Draw together the PRN device of facsimile machine, duplicator etc.) the middle use, as a kind of liquid injection device. This Outward, equipment of the present invention also is applicable to the liquid spray of spraying such as the liquid of electrode material or coloring material Jet device, this equipment makes in making liquid crystal display, EL display and surface emitting display With, also being applicable to the liquid injection device that sprays biological organic substance, this equipment is being made biochip The middle use, or be applicable to for example sample injection device of precise pipet.
Claims (76)
1. liquid injection device, be equipped with fluid jetting head and valve unit, fluid jetting head is installed on the balladeur train, and can move back and forth along the horizontal direction of target, valve unit is installed on the described balladeur train, and by service duct, gives described valve unit supply liquid from the liquid retainer, and described valve unit is fed to described fluid jetting head to liquid, and described valve unit has:
Pressure chamber, it is connected to described liquid retainer by described service duct;
Valve, it opens or closes described service duct, and liquid is fed to described pressure chamber;
Propulsion members, it advances described valve along the direction of closing described service duct; With
The fexible film member, the negative pressure that produces when it reduces according to the liquid in the described pressure chamber is shifted, and it is directly delivered to described valve to displacement, thereby causes the propulsive force operation of described valve against described propulsion members.
2. liquid injection device as claimed in claim 1, wherein, described liquid injection device has main body, described liquid retainer is connected on the main body, and described service duct is made of flexible pipe, and liquid is supplied to described valve unit by described flexible pipe from described liquid retainer.
3. liquid injection device as claimed in claim 1 or 2 wherein, applies normal pressure by the liquid in described liquid retainer liquid is supplied to described valve unit from described liquid retainer.
4. liquid injection device as claimed in claim 3, wherein, described liquid retainer comprises the shell that is in airtight conditions and remains on liquid packaging body in the described shell, that flexible material is made, liquid is sealed in the described liquid packaging body, and, when compressed air was applied to space segment between described shell and the described liquid packaging body, normal pressure was applied on the liquid in the described liquid retainer.
5. liquid injection device as claimed in claim 3, wherein, for liquid is imported described service duct from described liquid retainer, in described liquid retainer, form liquid and derived part, and described liquid is derived part along gravity direction, be positioned at the top of described valve unit, and wherein, described normal pressure derives the head difference between part and the valve unit based on liquid and produces.
6. liquid injection device as claimed in claim 1, wherein, described film member is density polyethylene film with high or polypropylene film, on it lamination the nylon film that applies with the vinylidene chloride copolymer.
7. liquid injection device as claimed in claim 1, wherein, described film member is the gas shielding layer that forms between the two-layer film of synthetic resin.
8. liquid injection device as claimed in claim 1, wherein, described film member is the film that forms with polyethylene or polypropylene, on it lamination polyethylene terephthalate thin film, deposited aluminium oxide or silica on the polyethylene terephthalate thin film.
9. as any described liquid injection device in the claim 6 to 8, wherein, bearing plate is set on the described film member, and described valve is according to the mobile working of described bearing plate, and the displacement of described film member has caused moving of bearing plate.
10. liquid injection device as claimed in claim 9, wherein, described bearing plate forms with polyethylene or polypropylene.
11. as any described liquid injection device in the claim 1 to 10, wherein, described valve unit also has:
Supply orifice is between described service duct and described pressure chamber; With
Spring be used for advancing described valve along the direction of closing supply orifice, and described valve is opened described supply orifice after receiving the displacement of described film member against the propulsive force of spring.
12. liquid injection device as claimed in claim 11, wherein, described valve has tabular component, with with mode and the integrally formed bar member of tabular component from the tabular component projection, described bar member is inserted in the described supply orifice, described tabular component bears the propulsive force of described spring, and counter pushing away (depression) effect that causes of the described bar member displacement of bearing described film member.
13. liquid injection device as claimed in claim 12, wherein, described supply orifice is included in the supported hole that forms in the cell enclosure and along the peripheral a plurality of holes of cutting open that form at interval of supported hole, supported hole is used for slidably supporting the bar member of described valve unit.
14. as claim 12 or 13 described liquid injection devices, wherein, the containment member that forms annular is located on the described cell enclosure in the mode around the outside of described supply orifice, and when the tabular component of described valve was resisted against on the containment member, described supply orifice was closed.
15. as claim 12 or 13 described liquid injection devices, wherein, the containment member that forms annular is fixed on the tabular component of described valve unit, and when described tabular component was resisted against on the cell enclosure in the mode around the outside of described supply orifice, described supply orifice was closed.
16. as any described liquid injection device in the claim 1 to 15, wherein, described valve unit is furnished with filter chamber, filter chamber and is provided with filter element in this filter chamber between described service duct and described pressure chamber.
17. liquid injection device as claimed in claim 16, wherein, described filter chamber has the passage that is used for the bottom of filter chamber is connected to described pressure chamber, and described filter element is arranged in the mode that covers described passage.
18. as any described liquid injection device in the claim 1 to 17, wherein, described pressure chamber has the outlet of leading to described fluid jetting head, and should export along gravity direction, in the highest part formation of described pressure chamber.
19. as any described liquid injection device in the claim 1 to 18, wherein, the waterproof thin film coated of described film member.
20. as any described liquid injection device in the claim 1 to 19, wherein, be provided with the lid of the outer surface that is used to seal described film member, wherein, in described lid, formed gas channel and will lead to the release opening of atmosphere by gas channel.
21. liquid injection device as claimed in claim 20, wherein, described gas channel is included in slot part and the film member that forms in the wall of described lid, when the wall of film member and described lid closely contacts, it covers described slot part, and wherein said release opening forms in the end of described gas channel.
22. liquid injection device as claimed in claim 9 wherein, in order to limit the displacement of described film member, has formed a plurality of restriction projectioies towards described bearing plate in pressure chamber.
23. liquid injection device as claimed in claim 9 wherein, in order to limit the displacement of described film member, has formed the restriction projection of a plurality of inwalls towards described pressure chamber on described bearing plate.
24. valve unit, it is installed on the liquid injection device, described liquid injection device is used for from the fluid jetting head atomizing of liquids that is installed in balladeur train, moves with respect to target, and pass through service duct, from with described balladeur train liquid retainer placed apart to described valve unit supply liquid, described valve unit has:
Pressure chamber, it is connected to described liquid retainer by described service duct;
Valve, it opens or closes described service duct, and liquid is fed to described pressure chamber;
The fexible film member, it has constituted the part of described pressure chamber, and the negative pressure that produces when reducing according to the liquid in the described pressure chamber is shifted, thereby causes described valve operation.
25. method of making valve unit, wherein, pressure chamber is included in sunk part that forms in the cell enclosure and the fexible film member that covers this sunk part, and wherein valve unit has valve, be used to utilize described film member, come from the negative pressure of the minimizing of liquid in the described pressure chamber by detection, liquid is imported pressure chamber from the liquid retainer, described method comprises:
Heat the step of described cell enclosure;
Described film member is placed on step on the cell enclosure in the mode of the sunk part that covers heated cell enclosure;
Described film member heat is attached on the cell enclosure, thereby forms the step of described pressure chamber.
26. method of making valve unit, wherein, pressure chamber is included in sunk part that forms in the cell enclosure and the fexible film member that covers this sunk part, wherein said valve unit has valve, be used to utilize described film member, come from the negative pressure of the minimizing of liquid in the described pressure chamber by detection, liquid is imported pressure chamber from the liquid retainer, described method comprises:
Bearing plate is attached to the step on first upper surface of described film member;
Described film member is placed on step on the cell enclosure in the mode of the sunk part that covers described cell enclosure;
Described film member heat is attached on the cell enclosure, thereby forms the step of described pressure chamber.
27. the method for manufacturing valve unit as claimed in claim 26 wherein, in placing the step of described film member, makes second upper surface relative with first upper surface of described film member towards the described sunk part of described cell enclosure, and
Wherein, in the step that described film member heat is attached on the described cell enclosure, described film member is attached to the outer of described sunk part and places, and the flat surfaces that described bearing plate is heated parts is pressed to sunk part.
28. the method for manufacturing valve unit as claimed in claim 26, wherein, in the step that described film member heat is attached on the described cell enclosure, the projection that described bearing plate is heated parts is pressed to sunk part, and described film member is attached to the periphery of described sunk part by heat.
29. the method for manufacturing valve unit as claimed in claim 28, wherein, the described projection of described heater block forms with heat-insulating material.
30. the method for manufacturing valve unit as claimed in claim 26, wherein, in the step that described film member heat is attached on the described cell enclosure, the film member is heated parts and presses on the cell enclosure, and described film member is attached on the described cell enclosure by heat, and the air between heater block and the cell enclosure is extracted and discharge in the hole from heater block.
31. an inkjet type recording apparatus, described equipment is equipped with: record head, record head are installed on the balladeur train and move back and forth along the horizontal direction of record-paper; The ink supply valve unit, it is installed on the described balladeur train, and ink is supplied with described valve unit by ink-feed channel from print cartridge, and to described record head, described ink donor unit has described valve unit ink feed:
Pressure chamber is connected to described print cartridge by described ink-feed channel;
Valve, it opens or closes described ink-feed channel, and ink feed is arrived described pressure chamber;
Driving body, it detects the negative pressure that produces in pressure chamber when ink is consumed by described record head, and operate described valve; With
Negative pressure keeps spring, and it is resisted against on the described driving body, and advances described driving body along the direction of the volume of expanding described pressure chamber.
32. inkjet type recording apparatus as claimed in claim 31, wherein, described ink supply valve unit also is furnished with Packing spring, and this spring advances described valve along the direction of closing described ink-feed channel.
33. as claim 31 or 32 described inkjet type recording apparatus, wherein, described driving body is made of the fexible film member, the film member has constituted the part of described pressure chamber.
34. inkjet type recording apparatus as claimed in claim 33, wherein, bearing plate is arranged on the described film member, and described valve moves work according to the described bearing plate that is caused by the displacement of described film member.
35. inkjet type recording apparatus as claimed in claim 34, wherein, described negative pressure keeps spring to arrange in the mode that the direction that moves of its direction of propulsion and described bearing plate is complementary.
36. inkjet type recording apparatus as claimed in claim 35, wherein, it is helical spring that described negative pressure keeps spring, and described helical spring is arranged near the mode the center that can be resisted against described bearing plate.
37. inkjet type recording apparatus as claimed in claim 35, wherein, it is to be made of helical spring that described negative pressure keeps spring, and described helical spring is arranged near the peripheral mode that can be resisted against described bearing plate.
38. inkjet type recording apparatus as claimed in claim 35, wherein, it is to be made of a plurality of helical springs that described negative pressure keeps spring, and each described helical spring is arranged near the peripheral mode that can be resisted against described bearing plate.
39. inkjet type recording apparatus as claimed in claim 35, wherein, it is to be made of leaf spring that described negative pressure keeps spring, and its two ends in a longitudinal direction are supported, and its core is arranged near the mode the center that can be resisted against described bearing plate.
40. as any the described inkjet type recording apparatus in the claim 32 to 39, wherein, described ink supply valve unit also has:
Supply orifice is between described ink-feed channel and described pressure chamber; With
Packing spring be used for advancing described valve along the direction of closing supply orifice, and described valve is opened described supply orifice after receiving the displacement of described film member against the propulsive force of spring.
41. inkjet type recording apparatus as claimed in claim 40, wherein, described valve has tabular component and with mode and the integrally formed bar member of tabular component from the tabular component projection, described bar member is inserted into described ink supply aperture, described tabular component bears the propulsive force of described Packing spring, and the repulsion that causes of the described bar member displacement of bearing described film member.
42. inkjet type recording apparatus as claimed in claim 41, wherein, described ink supply aperture is included in the supported hole that forms in the cell enclosure and along the peripheral a plurality of holes of cutting open that form at interval of this supported hole, described supported hole is used for slidably supporting the bar member of described valve.
43. inkjet type recording apparatus as claimed in claim 42, wherein, the containment member that forms annular is located on the described cell enclosure in the mode around the outside of described supply orifice, and when the tabular component of described valve was resisted against on the containment member, described supply orifice was closed.
44. as any the described inkjet type recording apparatus in the claim 40 to 43, wherein,, described negative pressure done based on the variation of the volume of described pressure chamber after maximum the moving even keeping spring to be built into described Movable valve, and still compressible.
45. as any the described inkjet type recording apparatus in the claim 41 to 44, wherein, described print cartridge is connected on the main body of recording equipment, and described ink-feed channel comprises soft ink supply pipe, ink is fed to described ink supply valve unit by soft ink supply pipe from print cartridge.
46. inkjet type recording apparatus as claimed in claim 45, wherein, when normal pressure was applied on the ink in the described print cartridge, ink was fed to the ink supply valve unit from described print cartridge.
47. inkjet type recording apparatus as claimed in claim 46, wherein, described print cartridge comprises shell that is in airtight conditions and the ink packaging body that keeps flexible material in the enclosure, ink is sealed in the described ink packaging body, and, when compressed air was applied to space segment between described shell and the described ink packaging body, normal pressure was applied on the ink in the described print cartridge.
48. inkjet type recording apparatus as claimed in claim 46, wherein, for ink is imported described ink supply valve unit from described print cartridge, in described print cartridge, formed the ink lead-out branch, described ink lead-out is divided along gravity direction, be positioned at the top of described ink supply valve unit, and described normal pressure produces based on the head difference between ink lead-out branch and the valve unit.
49. a liquid injection device, it is equipped with: the liquid storage member of storage of liquids; Fluid jetting head, its atomizing of liquids; The liquid service duct is used for described liquid is fed to described fluid jetting head from described liquid storage member; And valve unit, it is arranged in the liquid service duct, and stores described liquid temporarily, and described valve unit has:
The supply chamber will flow into this supply chamber from the liquid of described liquid storage member supply;
Pressure chamber, the liquid that be exported to described fluid jetting head is stored in this pressure chamber; With
Valve, its utilize when described liquid by the negative pressure that when described fluid jetting head sprays, in described pressure chamber, produces, described supply chamber is connected to described pressure chamber,
Wherein, the liquid outlet that leads to described fluid jetting head is located in the described pressure chamber, is positioned at 25% position of the volume that is equal to or less than described pressure chamber at gravity direction.
50. a liquid injection device is equipped with: the liquid storage member of storage of liquids; Fluid jetting head, its atomizing of liquids; The liquid service duct is used for described liquid is fed to described fluid jetting head from described liquid storage member; Valve unit, it is arranged in the liquid service duct, and stores described liquid temporarily, and channel valve, and it is arranged in the described liquid service duct, is positioned at the upstream of valve unit, is used to open and close the liquid service duct, and described valve unit has:
The supply chamber will flow into this supply chamber from the liquid of described liquid storage member supply;
Pressure chamber, the liquid that be exported to described fluid jetting head is stored in this pressure chamber; With
Valve, its utilize when described liquid by the negative pressure that when described fluid jetting head sprays, in described pressure chamber, produces, described supply chamber is connected to described pressure chamber,
Wherein, the liquid outlet that leads to described fluid jetting head is located in the described pressure chamber, is positioned at 40% position of the volume that is equal to or less than described pressure chamber on gravity direction.
51. as claim 49 or 50 described liquid injection devices, wherein, described liquid outlet is located at the lowermost portion of described pressure chamber on gravity direction.
52., wherein, be formed less than the lower space that is positioned at the described pressure chamber under the center at the upper space that is positioned at the described pressure chamber above the pressure chamber center on the gravity direction as any the described liquid injection device in the claim 49 to 51.
53. liquid injection device as claimed in claim 52, wherein, the described upper space of described pressure chamber narrows down in the upward direction.
54. liquid injection device as claimed in claim 53, wherein, the described upper space of described pressure chamber narrows down towards periphery near the center of described pressure chamber.
55., wherein, in the described lower space of described pressure chamber, formed the volume augmenting portion as any the described liquid injection device in the claim 52 to 54.
56. as any the described liquid injection device in the claim 49 to 55, wherein, described pressure chamber is included in sunk part and the flexible member that forms in the cell enclosure of described valve unit, described flexible member covers the opening of this sunk part, and be out of shape according to the negative pressure in the pressure chamber, to open described valve
At the inclined surface that the periphery of described sunk part forms, the mode of formation is that described flexible member one side trails.
57. a valve unit is located in the liquid service duct, is used for liquid is fed to the fluid jetting head of atomizing of liquids from the liquid storage member of storage of liquids, wherein, described valve unit comprises:
The supply chamber will flow into this supply chamber from the liquid of described liquid storage member supply;
Pressure chamber, the liquid that be exported to described fluid jetting head is stored in this pressure chamber; With
Valve, its utilize when described liquid by the negative pressure that when described fluid jetting head sprays, in described pressure chamber, produces, described supply chamber is connected to described pressure chamber,
Wherein, the liquid outlet that leads to described fluid jetting head is located in the described pressure chamber, is positioned at 25% position of the volume that is equal to or less than described pressure chamber on gravity direction.
58. valve unit, be located at the position in the downstream of channel valve, be used to control the connection of the liquid in the liquid service duct, described liquid service duct is used for liquid is fed to the fluid jetting head of atomizing of liquids from the liquid storage member of storage of liquids, and described valve unit has:
The supply chamber will be flowed into this supply chamber by the liquid from the supply of described liquid storage member;
Pressure chamber, the liquid that be exported to described fluid jetting head is stored in this pressure chamber; With
Valve, its utilize when described liquid by the negative pressure that when described fluid jetting head sprays, in described pressure chamber, produces, described supply chamber is connected to described pressure chamber,
Wherein, the liquid outlet that leads to described fluid jetting head is located in the described pressure chamber, is positioned at 40% position of the volume that is equal to or less than described pressure chamber on gravity direction.
59. a liquid injection device comprises:
Balladeur train, it by when target moves from a plurality of nozzle ejection liquid of fluid jetting head, liquid is attached on the described target;
The liquid retainer, it is located on the position that separates with described balladeur train, and storage will be supplied to the liquid of described balladeur train;
Soft supply pipe, it is placed between described liquid retainer and the described balladeur train, and it has formed the fluid passage that extends to balladeur train from the liquid retainer; With
Valve mechanism is installed on the described balladeur train, and is located at from described supply pipe and extends to the fluid passage of described fluid jetting head,
Wherein, described liquid retainer is arranged in predetermined altitude above the described valve mechanism with interior in scope that described balladeur train moves.
60. liquid injection device as claimed in claim 59, wherein, described liquid retainer is arranged near the center of described balladeur train moving range.
61. as claim 59 or 60 described liquid injection devices, wherein, described valve mechanism has the pressure chamber that is positioned at described valve mechanism, be in position, and described valve mechanism along with reducing the negative pressure that is produced from the injection of described nozzle, liquid is opened described fluid passage according to the liquid in the described pressure chamber towards described fluid jetting head.
62. as any the described liquid injection device in the claim 59 to 61, wherein, described predetermined altitude is an elevation head, and described elevation head is equal to or greater than the pressure head that the pressure loss that occurs between comfortable described liquid retainer and the described valve mechanism and pressure head sum from pressure required when described liquid makes that described valve mechanism is in open mode.
63. liquid injection device as claimed in claim 62, wherein, described predetermined altitude is an elevation head, described elevation head be equal to or greater than come since described liquid retainer to the pressure head of the pressure loss of described valve mechanism and from the pressure head sum of pressure required when described liquid makes that described valve mechanism is in open mode.
64. as any the described liquid injection device in the claim 59 to 63, wherein, described predetermined altitude is an elevation head, it is equal to or greater than following pressure head sum: come since the pressure head of described liquid retainer to the pressure loss of described valve mechanism, the variation of the liquid head that causes from the pressure head of pressure required when described liquid makes that described valve mechanism is in open mode with by the consumption of the liquid in the described liquid retainer.
65. as the described liquid injection device of claim 64, wherein, described predetermined altitude is an elevation head, it equals following pressure head sum: come since the pressure head of described liquid retainer to the pressure loss of described valve mechanism, variation from the pressure head and the liquid head in the described liquid retainer of pressure required when described liquid makes that described valve mechanism is in open mode.
66. as claim 59 or 60 described liquid injection devices, wherein, the length of described supply pipe and diameter are determined as follows: pressure when described valve is opened and the pressure that is produced during less than the predetermined altitude that is positioned at when described liquid retainer above the described valve mechanism when pressure loss sum that liquid causes when described liquid retainer flows into described fluid jetting head.
67. liquid injection device, it is equipped with balladeur train and the liquid retaining part of being furnished with fluid jetting head, the liquid retaining part is installed on the described balladeur train, and maintenance will be supplied to the liquid of described fluid jetting head, described liquid injection device is ejected into liquid on the target from described fluid jetting head, and it comprises valve unit, and valve unit is located between described fluid jetting head and the described liquid retaining part, and described valve unit has:
Valve is connected to the pressure chamber of making at described fluid jetting head one lateral confinement to the supply chamber of making at described liquid retaining part one lateral confinement, perhaps the supply chamber disconnected from pressure chamber,
Propulsion members, it along the direction of closing described service duct advance described valve and
Driving body, it surveys the negative pressure from the minimizing of described pressure intracavity liquid, and by the propulsive force of described valve against described propulsion members, described supply chamber is connected to pressure chamber.
68. as the described liquid injection device of claim 67, wherein, described liquid retaining part is arranged in the top, described supply chamber of described valve unit.
69. as claim 67 or 68 described liquid injection devices, wherein, described valve unit and described balladeur train form an integral body, and wherein, described liquid retaining part can be connected to described balladeur train, and can remove from described balladeur train.
70. as the described liquid injection device of claim 69, wherein, the supply pin that be inserted in the described liquid retaining part forms in described valve unit; And described liquid retaining part is furnished with supply section and valve mechanism, and described supply pin will be inserted into described supply section, and along with described supply pin is inserted into, described valve mechanism is opened, and along with described supply pin is pulled out, described valve mechanism is closed.
71. as claim 67 or 68 described liquid injection devices, wherein, described valve unit and described liquid retaining part form an integral body, and described liquid retaining part and described valve unit can be connected to described balladeur train together, and can remove from described balladeur train.
72. as the described liquid injection device of claim 71, wherein, the supply pin that be inserted in the described valve unit forms in described balladeur train; And described valve unit is furnished with valve mechanism, and along with described supply pin is inserted into, described valve mechanism is opened, and along with described supply pin is pulled out, described valve mechanism is closed.
73. as any the described liquid injection device in the claim 69 to 72, wherein, described driving body is made of the fexible film member, and wherein, when the film member was receiving negative pressure backward shift from the minimizing of the liquid in the pressure chamber, described valve unit was operated.
74. a liquid retainer, it is installed on the balladeur train, and described balladeur train has fluid jetting head and keeps being supplied to the liquid retaining part of the liquid of fluid jetting head, and described liquid retainer is characterised in that
The liquid retaining part by be fixed to valve unit on the balladeur train and be installed on the balladeur train and
After the negative pressure that detects from the minimizing of the liquid in the pressure chamber of the valve unit that is connected to fluid jetting head, the supply chamber that handle is connected to the valve unit of liquid retaining part is opened from the valve that pressure chamber disconnects, thereby the liquid in the liquid retaining part is supplied to pressure chamber.
75. as the described liquid retainer of claim 74, wherein, the liquid retaining part is installed on the balladeur train in the mode that the position is higher than the supply chamber of valve unit, and is installed in the supply port inclination of the bottom of the liquid retaining part on the balladeur train towards the liquid retaining part that is connected to the supply chamber.
76. a liquid retainer removably is installed on the balladeur train with fluid jetting head, described liquid retainer comprises:
Keep the liquid retaining part and the valve unit of liquid, described valve unit is positioned at the position towards described fluid jetting head in described liquid retainer,
Described valve unit is furnished with valve and driving body, and described valve perhaps disconnects the supply chamber being connected to the pressure chamber of making at described fluid jetting head one lateral confinement in the supply chamber that described liquid retaining part one lateral confinement is made from pressure chamber; Described driving body is surveyed the negative pressure from the minimizing of described pressure intracavity liquid, and operates described valve.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001345827 | 2001-11-12 | ||
| JP345827/2001 | 2001-11-12 | ||
| JP082376/2002 | 2002-03-25 | ||
| JP252176/2002 | 2002-08-29 | ||
| JP252173/2002 | 2002-08-29 | ||
| JP255171/2002 | 2002-08-30 | ||
| JP302256/2002 | 2002-10-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1832860A true CN1832860A (en) | 2006-09-13 |
| CN100562431C CN100562431C (en) | 2009-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028056825A Expired - Fee Related CN100562431C (en) | 2001-11-12 | 2002-11-12 | Liquid injection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100562431C (en) |
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| CN102189808A (en) * | 2010-03-01 | 2011-09-21 | 精工爱普生株式会社 | Liquid ejecting apparatus |
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