CN1771133A - Liquid jetting device - Google Patents
Liquid jetting device Download PDFInfo
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- CN1771133A CN1771133A CN 200580000258 CN200580000258A CN1771133A CN 1771133 A CN1771133 A CN 1771133A CN 200580000258 CN200580000258 CN 200580000258 CN 200580000258 A CN200580000258 A CN 200580000258A CN 1771133 A CN1771133 A CN 1771133A
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Abstract
For cleaning a recording head, a printer seals nozzles by means of a cap member and thus forms a closed circulatory system. In this state, a gear pump is activated and draws waste ink and the air from the cap member. The waste ink and the air then flow in the cap member, a check valve, a tube, the gear pump, and a different tube in this order and are introduced into a first ink cartridge. The air is introduced into a second ink cartridge through a corresponding tube as pressurized air. The check valve prevents the waste ink and the pressurized air from returning to the cap member. This suppresses backflow of the liquid and the air, and ink ejection is performed effectively.
Description
Technical field
The present invention relates to liquid injection apparatus.
Background technology
Traditionally, ink-jet recording apparatus briefly is called one type liquid injection apparatus.Ink-jet recording apparatus comprises " from balladeur train " type, and its ink inside retainer is connected to record head through the ink supply pipe.The ink retainer is set in the ink cartridge as ink tank.Utilize pump for example to import forced air in the ink cartridge, the ink retainer is pressurized.This causes the ink in the ink retainer to deliver to record head through the ink supply pipe, so that record head is by ink supply.Then, as the ink droplets that is used to write down character or image, ink sprays to record-paper from the nozzle of record head.
Typically, when needs prevention ink sprayed problem, ink-jet recording apparatus was carried out cleaning, and promptly the nozzle from record head has bubble or the ink that increases viscosity to useless print cartridge discharging.
In balladeur train type ink-jet recording apparatus, useless print cartridge can form with ink cartridge is whole.Multiple such device (for example referring to patent document 1) has been proposed.
As shown in Figure 7, patent document 1 has been described a kind of ink-jet recording apparatus 100 with the ink cartridge 102 that is used to hold ink bag 101.The ink supply pipe 104 of the ink supply port one 03 through being connected to ink cartridge 102, ink bag 101 is connected to record head 105.Ink-jet recording apparatus 100 also comprises the lid 106 that is used for receiving from record head 105 useless China ink.Through ink recovery pipe 107 and pump 108, lid 106 is connected to the pressurization port 109 of ink cartridge 102.Valve 112 and pressure sensor 113 are connected to the discharge port 110 of ink cartridge 102 through path 111.When needs, valve 112 is opened ink cartridge 102.The pressure that pressure sensor 113 detects in the ink cartridge 102.Obturator 114 is formed in the ink supply pipe 104, is used for forbidding selectively and allowing the ink stream of ink supply pipe 104.
When pump 108 is activated and obturator 114 when keeping ink supply pipes 104 to open, useless ink and air are introduced in the ink cartridge 102 from covering 106 through ink recovery pipe 107.This has improved the pressure in the ink cartridge 102, thereby squeezeout ink bag 101 makes ink be fed to record head 1 through ink supply pipe 104.
When recovering the ink jet performance when ink-jet recording apparatus 100 operation, obturator 114 blocks ink supply pipes 104 and pump is activated by 108.When the pressure in the ink cartridge 102 arrived predeterminated level, ink supply pipe 114 was unlocked.This can cause ink to flow to record head 105 fast, thereby removes bubble ink and the ink from the nozzle segment of record head 105.By this way, inkjet performance is recovered by pressurization.
In ink-jet recording apparatus 100, expectation: ink suitably is fed to record head 105, is used for effectively realizing printing.Therefore, ink bag 101 need be remained on suitably pressurized state.
Now, ink jet device needs compactness, and the gear pump that satisfies this requirement has caused attention.
Yet if ink-jet recording apparatus 100 comprises gear pump, and the suction of pump keeps performance to reduce owing to the foozle in the pump, and air or ink can flow back to and cover 106.This makes and is difficult to ink bag 101 is remained on suitable pressurized state.If ink refluxes, useless ink and AIR MIXTURES are leaked to covers 106, produces bubble in lid 106, thereby has polluted record head 105.
In addition, when ink-jet recording apparatus 100 utilization was covered the nozzle of 106 seal record 105, ink recording device 100 had formed closed cycle system.Therefore, as the pressure imbalance in pressure in the operculum 106 and the record head 105, or when covering pressure in 106 and becoming higher than the pressure in the record head 105, air and useless China ink can flow back into record head 105 from covering 106.
If the suction of gear pump keeps performance relatively low, by nozzle tegmentum 106 sealings of record head 105, when gear pump was activated, air and waste liquid ink can flow to ink cartridge 102.Yet if gear pump stops, air and useless China ink can flow back into and cover 106.This air and useless China ink can enter record head 105 through the nozzle of record head 105.This has influenced the falcate of the ink that produces to a certain extent in nozzle, thereby has hindered the ink of the expectation of ink recording device 100 to spray.
Patent document 1: Japanese publication is announced 2001-162838 number.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of backflow liquid injection apparatus of atomizing of liquids reliably that can be by suppressing liquid and air.
For realizing aforementioned and other purpose, the invention provides a kind of liquid injection apparatus.This device has: the jet head liquid that is used for atomizing of liquids; Be used to receive cover from the waste liquid of jet head liquid discharging; Be used to keep the waste liquid box of waste liquid; Be used for from cover suction waste liquid and waste liquid introduced the gear pump of waste liquid box.This device also comprises: be used to suppress the waste liquid backflow restraining device that waste liquid is back to cover.
If the suction of gear pump keeps performance owing to for example foozle descends, when the gear air pump inoperative, waste liquid can flow back to cover through gear pump.Yet this backflow is suppressed by the backflow restraining device.This suppressed since the waste liquid that flows as bubble from cover to the pollution of jet head liquid.In addition, when by utilizing cover seal fluid injector head, when liquid injection apparatus formed closed cycle system, the backflow of waste liquid from the cover to the jet head liquid was inhibited.Thereby remain on the crescent of the liquid that forms in the jet head liquid.Therefore, make liquid injection apparatus atomizing of liquids reliably.
The waste liquid backflow restraining device of liquid injection apparatus can be arranged between waste liquid box and the gear pump or between gear pump and the cover.If waste liquid backflow restraining device is disposed between waste liquid box and the gear pump, after by the gear pump suction, waste liquid is introduced in the waste liquid box through waste liquid backflow restraining device.This makes waste liquid backflow restraining device suppress the backflow of waste liquid from the waste liquid box.
If waste liquid backflow restraining device is set between gear pump and the cover, after being received by cover, waste liquid is aspirated by gear pump through waste liquid backflow restraining device.Therefore, in both of these case,, when gear pump does not use, also can suppress the backflow of waste liquid to cover even the suction of gear pump keeps performance relatively low.If particularly waste liquid backflow restraining device is set between gear pump and the cover, when gear pump was operated, negative pressure all acted in the path between cover and the waste liquid backflow restraining device.Therefore, when cover sealed-in nozzles for example, waste liquid is suppressed further through the backflow of cover to jet head liquid.
The waste liquid backflow restraining device of liquid injection apparatus can be formed by valve gear.Valve gear suppresses the backflow of waste liquid from the waste liquid box to cover.This make the liquid injection apparatus comprise valve gear suppressed from cover flow as the pollution of the waste liquid of bubble to jet head liquid.In addition, when liquid injection apparatus formed closed cycle system, waste liquid was inhibited to the backflow of jet head liquid.
Another aspect of the present invention is a kind of liquid injection apparatus, comprising: the jet head liquid that is used for atomizing of liquids; The liquid retainer is used to keep the liquid that will spray and supply liquid to jet head liquid when pressurized air is pressurizeed; With the gear pump that is used to produce forced air, forced air is used for the liquid retainer is pressurizeed.This device also comprises the air backflow restraining device that allows forced air only to be fed to the liquid retainer.
Of the present invention aspect this in, air backflow restraining device has limited the supply of the forced air that is used to be fed to the liquid retainer.This has suppressed the backflow of forced air from the liquid retainer, thereby prevents the pressure drop in the liquid retainer.Therefore, the liquid retainer is allowed to liquid suitably is fed to jet head liquid by pressurized effectively.This makes liquid injection apparatus atomizing of liquids reliably.In addition, if for example liquid injection apparatus forms closed cycle system, by preventing the backflow of forced air, forced air is inhibited to the backflow of jet head liquid.Thereby it is crescent to have kept the liquid that forms in jet head liquid.Therefore, liquid injection apparatus atomizing of liquids reliably.
Air backflow restraining device can be disposed between liquid retainer and the gear pump or the upstream of gear pump.If air backflow restraining device is disposed between liquid retainer and the gear pump, the forced air that is produced by gear pump is supplied to the liquid retainer through air backflow restraining device.Air backflow restraining device has suppressed the backflow of forced air.This has suppressed the pressure drop in the liquid retainer, and makes the liquid retainer compatibly supply liquid to jet head liquid.
If air backflow restraining device is set at the upstream of gear pump, the upstream backflow of the forced air that is produced and sent downstream from gear pump by gear pump is inhibited.Or rather, manufactured error reduces even the suction of gear pump keeps performance, and the backflow of forced air also can be prevented from.In addition, if for example liquid injection apparatus forms closed cycle system, forced air is inhibited to the backflow of jet head liquid.In addition, because forced air can not turn back to upstream side from the downstream of gear pump, the pressure drop in the liquid retainer is inhibited.
Air backflow restraining device can be formed by valve gear.This valve gear allows forced air only to be fed to the liquid retainer.This makes the liquid injection apparatus with valve gear suppress to be supplied to the pressure drop of the forced air of liquid retainer.In addition, if when liquid injection apparatus forms closed cycle system, forced air is inhibited to the backflow of jet head liquid.
Another aspect of the present invention is a kind of liquid injection apparatus, has: the jet head liquid that is used for atomizing of liquids; Be used to receive cover as the liquid that sprays from jet head liquid of waste liquid; With the gear pump that is used for aspirating waste liquid and air from cover; With the liquid retainer, have: be used to keep waste liquid that aspirates by gear pump and the waste liquid retainer part of holding as the air of forced air; Use forced air to keep liquid to be fed to the liquid retaining part of jet head liquid with being used to.This device also comprises and is used to suppress waste liquid and the forced air fluid backflow restraining device to the backflow of cover.
This fluid backflow restraining device has suppressed the backflow to cover of waste liquid and forced air.Therefore, if the suction of gear pump keeps performance relatively low, when the gear air pump inoperative, also can suppress the backflow of waste liquid and forced air to cover.The pressure drop that this has suppressed forced air makes the liquid retainer utilize forced air compatibly the liquid that is kept to be fed to jet head liquid.In addition, waste liquid that flows as bubble from cover and forced air are inhibited to the pollution of jet head liquid.In addition, by utilizing cover seal fluid injector head, when liquid injection apparatus formed sealed circulation system, forced air and waste liquid were inhibited through the backflow of cover to jet head liquid when gear pump does not use when for example.Thereby kept the crescent of the liquid that in jet head liquid, forms.As a result, liquid injection apparatus atomizing of liquids reliably.
Fluid backflow restraining device can be disposed between liquid retainer and the gear pump or between gear pump and the cover.If fluid backflow restraining device is disposed between liquid retainer and the gear pump, after aspirating from cover, waste liquid and forced air are introduced in the waste liquid retainer part of liquid retainer through fluid backflow restraining device.The backflow from waste liquid retainer part to gear pump of waste liquid and forced air is inhibited.Therefore, even the suction of gear pump keeps performance relatively low, when gear pump does not use, also further be inhibited by the pollution as the waste liquid of bubble and forced air of flowing from cover to jet head liquid.The pressure drop of forced air in the waste liquid retaining part also is inhibited, thereby makes the liquid retainer of liquid retainer partly use forced air compatibly to supply liquid to jet head liquid.If fluid backflow restraining device is set between gear pump and the cover, gear pump aspirates waste liquid and air through fluid backflow restraining device from cover.Therefore, by utilizing cover seal fluid injector head, when liquid injection apparatus formed sealed circulation system, forced air and waste liquid were further suppressed through the backflow of cover to jet head liquid when the gear pump step operates when for example.This has kept the crescent of the liquid that forms in jet head liquid.Therefore, liquid injection apparatus atomizing of liquids reliably.
Fluid backflow restraining device can be formed by valve gear.Valve gear inhibition waste liquid and forced air are to the backflow of cover.This make the liquid injection apparatus comprise valve gear suppressed from cover flow as the pollution of the waste liquid of bubble and forced air to jet head liquid.In addition, by utilizing cover seal fluid injector head, when liquid injection apparatus formed closed cycle system, forced air and waste liquid were inhibited to the backflow of jet head liquid when for example.
This valve gear can comprise: at least one of waste liquid or forced air is introduced into intake section wherein; Waste liquid or forced air flow to outside exit portion from intake section by it; And valve body, be used for: if the pressure of forced air is not less than predetermined reference level, valve body is connected to each other intake section and exit portion, if waste liquid and forced air turn back to intake section from exit portion, valve body separates intake section with exit portion.
If waste liquid and forced air flow back to, valve body makes intake section separate with exit portion.Thereby waste liquid is introduced in waste liquid box or the waste liquid retainer part, and the backflow of waste liquid is inhibited.This has suppressed owing to the pollution of the waste liquid that flows from cover to jet head liquid.In addition, by intake section is separated with exit portion, the pressure drop in the liquid retainer is inhibited.Thereby, make the liquid retainer suitably supply liquid to jet head liquid.Therefore, liquid injection apparatus atomizing of liquids reliably.
The valve body of valve gear can be constructed to: if the difference of the pressure in pressure in the intake section and the exit portion surpasses predetermined reference value, it is connected to each other intake section and exit portion, if and the difference of pressure in the intake section and the pressure in the exit portion is equal to or less than this reference value, it separates intake section with exit portion.If for example gear pump does not turn round considerable time, because the slight leakage of forced air, the pressure in the exit portion can be lowered to atmospheric pressure, thereby eliminates pressure in intake section and the difference between the pressure in the exit portion.Even in this state, intake section and exit portion are maintained in the state separated from one another.This has prevented that when liquid injection apparatus is moved waste liquid and forced air flow back to.
In addition, if the backflow of waste liquid and forced air maybe may appear in for example gear pump inoperation and pressure in the exit portion rises, valve body separates intake section with exit portion.Or rather, when gear pump did not use, valve gear prevented that waste liquid and forced air from flowing back to.Therefore, the liquid injection apparatus that comprises gear pump suppressed by flow from cover as the pollution of the waste liquid of bubble to jet head liquid.In addition, by intake section is separated with exit portion, prevent the pressure drop in the liquid retainer.Therefore, the liquid retainer is pressurizeed effectively and is allowed to liquid suitably is fed to jet head liquid.In addition, when liquid injection apparatus formed closed cycle system, waste liquid and forced air were inhibited to the backflow of jet head liquid.Therefore, make liquid injection apparatus atomizing of liquids reliably.
Description of drawings
Fig. 1 is for schematically showing the perspective view according to the printer of the first embodiment of the present invention;
Fig. 2 is the block diagram that expression is used for the ink feeding system of record head;
Fig. 3 is the cross-sectional view strength that shows the structure of check-valves;
Fig. 4 (a) is (b) with the cross-sectional view strength that (c) is the mode of operation of each demonstration check-valves;
Fig. 5 is the block diagram that shows the ink feeding system that is used for record head according to a second embodiment of the present invention;
Fig. 6 is the cross-sectional view strength that shows the structure of the structure of check-valves and lid;
Fig. 7 is the block diagram that schematically shows the prior art liquid injection apparatus.
The specific embodiment
(first embodiment)
To Fig. 4 the first embodiment of the present invention is described hereinafter with reference to Fig. 1.
As shown in Figure 1, the framework 2 that comprises the essence parallelepiped as the printer 1 of liquid injection apparatus.Paper feed tray 3 is formed on the upper surface of framework 2, and goes out on the front surface that paper carrier 4 is set at framework 2.Paper feed tray 3 and go out paper carrier 4 each is constructed to be contained in the framework 2 in utilizing the folding state of unshowned linkwork.
Platen 5 is longitudinal extension in framework 2.Record-paper is inserted in the framework 2 through paper feed tray 3, and is fed to platen 5 by unshowned paper advance mechanism.Then, record-paper is sent to the outside from framework 2 through going out paper carrier 4.
Guide member 6 is arranged in the framework 2, and extends abreast with platen 5.Balladeur train 7 is supported by guide member 6, and guide member 6 passes balladeur train 7.Balladeur train 7 can move along guide member 6.Balladeur train motor (not shown) is secured to framework 2.By the tooth belt (not shown) around unshowned a pair of belt pulley, balladeur train 7 is operably connected to the balladeur train motor.When the balladeur train motor rotation, the driving force that is produced by the balladeur train motor is sent to balladeur train 7 through tooth belt.When providing power by the balladeur train motor, balladeur train 7 moves back and forth (at main scanning direction) abreast along guide member 6 and platen 5.
Be formed on as the record head 8 of jet head liquid on the lower surface of balladeur train 7 (relative) with platen 5.Record head 8 comprises the nozzle surface 8a (referring to Fig. 2) relative with record-paper.Nozzle surface 8a comprises 6 nozzle row (not shown), and every row comprises the injection N (Fig. 2) of number n (n is a natural number).The number of the nozzle N that forms in each nozzle row and the number of nozzle row can be revised as required.
First ink cartridge 9 and second ink cartridge 10 are set in the framework 2 as liquid container.First and second ink cartridges 9,16 will corresponding to the color (in first embodiment, black, cyan, magenta, yellow, nattierblue and light magenta) of nozzle as the ink feed of liquid to record head 8.Then, ink is pressurizeed (Fig. 2) by piezoelectric element 8b, and sprays as the corresponding nozzle N of ink droplets from record head 8.Ink droplets produces black, cyan, magenta, yellow, nattierblue on record-paper, or the point of light magenta.
In printer 1, wherein to print to carry out for ink droplets being ejected into record-paper, balladeur train 7 reciprocating zones are defined as print area.In addition, nonprinting region is defined in the printer 1, is used for sealed-in nozzles N when not carrying out printing.As shown in Figure 1, lid retainer 11 is formed in the nonprinting region.
Check-valves 14 is connected to the discharge port (not shown) of gear pump GP through pipe T3.The liquid inlet parts 15 of first ink cartridge 9 are connected to check-valves 14 through pipe T4.
First ink cartridge 9 has two retaining parts being determined by spacer 16.The ink bag B that retainer partly holds to keep black ink, and another holds the ink absorber 17 that absorbs ink.Ink bag B is connected to the record head 8 of balladeur train 7 through pipe T5.Ink absorber 17 is formed by the suction porous material such as sponge.
Therefore, useless ink and air are aspirated by gear pump GP, and flow to first ink cartridge 9 through fluid inlet part 15 from cover 12.Waste liquid is absorbed by the ink absorber in first ink cartridge 9 17 then.Check-valves 14 prevents that useless China ink from turning back to cover 12.
The air intake parts 19 of second ink cartridge 10 are connected to the air outlet slit parts 18 of first ink cartridge 9 through pipe T6.Therefore, first ink cartridge 9 and second ink cartridge 10 are interconnected.Second ink cartridge 10 comprises a plurality of retainer parts of being determined by the spacer 20 of correspondence.Each retaining part keeps comprising respectively the ink bag C of the color inks of cyan, magenta, yellow, nattierblue and light magenta, M, Y, LC and LM one.Ink bag C, M, Y, LC and LM respectively through the pipe T7, T8, T9, T10 and T11 are connected to the record head 8 of balladeur train 7.Opening device 22 is used for opening when needed second ink cartridge 10 through the air outlet slit parts 21 that pipe T12 is connected to second ink cartridge 10.
Therefore, when gear pump GP is activated, useless ink and air be by from cover 12 suctions, thereby flow into cover 12, pipe T2, gear pump GP, pipe T3, check-valves 14 and pipe T4 with the order of cover 12, pipe T2, gear pump GP, pipe T3, check-valves 14 and pipe T4.Then, useless ink and air are introduced in first ink cartridge 9.In this stage, useless ink is absorbed by ink absorber 17.Therefore, only there is air (after, be called " forced air ") in first ink cartridge 9, to move.Then, forced air flows to second ink cartridge 10 from first ink cartridge 9 through pipe T6, and is kept by the opening device 22 that is connected to pipe T12.
In other words, the air pressure in the air pressure in first ink cartridge 9 and second ink cartridge 10 keeps equal consistently, and can not become uneven to each other.Therefore, when gear pump G is activated, the ink bag B in first and second ink cartridges 9,10, C, M, Y, LC and the pressurization of LM pressurized air.This causes ink bag B, C, and M, Y, the ink of LC and LM flow to the record head 8 of balladeur train 7.
Or rather, in first embodiment, the gear pump GP of printer 1 applies the wash pump of negative pressure and is used for pressurized ink bag B, C, M, Y, the force (forcing) pump of LC and LM with acting on to cover 12.Therefore, when gear pump GP was activated, gear pump GP applied negative pressure to cover 12, was used to aspirate useless ink and air, and to ink bag B, C, M, Y, LC and LM pressurization are used for ink is delivered to record head 8.
14 structure referring now to Fig. 3 and 4 pairs of check-valves describes in detail.
As shown in Figure 3, check-valves 14 comprises: main body cover 30; Membrane portions 31; Support component 32; With spring members 33.Main body cover 30 has upper case part 30a and lower case part 30b.Upstream valve chamber part 34 is defined among the upper case part 30a with the shape of annular.Downstream valve chamber part 35 is defined among the lower case part 30b with funnel shaped.By the upper case part 30a and the lower case part 30b that combine, valve chamber 36 is defined in the main body cover 30.
The connecting hole 32 that is used for the connecting hole (not shown) of tube connector T3 and is used for tube connector T4 is defined in the main body cover 30 of check-valves 14.First path 38 through determining in main body cover 30 (upper case part 30a), the connecting hole that is used to manage T3 is communicated with upstream valve chamber part 34.Alternate path 39 through determining in main body cover 30 (lower case part 30b), the connecting hole 37 that is used to manage T4 is communicated with upstream valve chamber part 35.This structure makes useless China ink and air flow to valve chamber 36 (upstream valve chamber part 34 and downstream valve chamber part 35) through the pipe T3 and first path 38 from gear pump GP.Then, through alternate path 39 and pipe T4, useless ink and air flow to first ink cartridge 9 from valve chamber 36.
From corresponding to downstream valve chamber part 35 sides, have columniform support component 32 and be fitted in the intercommunicating pore 41 of membrane portions 31.Support component 32 is whole with 31 one-tenth of membrane portions.When support component 32 was promoted by spring members 33, support component 32 made membrane portions 31 from upwards distortion (upstream the valve chamber part 34) of downstream valve chamber part 35.Through hole 44 is determined by the space that support component 32 surrounds, and is communicated with intercommunicating pore 41.Projection 32a is from the outer surface projection of support component 32, and the upside of the projection 32a end of upstream valve chamber part 34 (more near) contact membrane portions 31.When this structure makes support component 32 in being fitted to membrane portions 31, be positioned with respect to membrane portions 31.
Circular depressed 45 is defined in the bottom of downstream valve chamber part 35, and is relative with support component 32.Spring members 33 engages the wall of depression 45 and the external peripheral surface of support component 32, and contact protrusion 32a.Like this, spring members 33 is accommodated in the downstream valve chamber part 35.Spring members 33 through support component 32 upwards (upstream the valve chamber part 34) promote membrane portions 31.If the pressure difference value in pressure in the upstream valve chamber part 34 and the downstream valve chamber part 35 is equal to or less than reference value, spring members 33 makes membrane portions 31 distortion, so that cause projection 42 contact contact portions 43.On the contrary, if the difference of the pressure in pressure in the upstream valve chamber part 34 and the downstream valve chamber part 35 is greater than reference value, because through the pressure of membrane portions 31 from 34 acceptance of upstream valve chamber part, spring members 33 downward (the valve chamber part 35 downstream) is out of shape.
Therefore, as shown in Figure 3, if the difference of the pressure in pressure in the upstream valve chamber part 34 and the downstream valve chamber part 35 is equal to or less than reference value, the projection 42 contact contact portions 43 of membrane portions 31.In this state, check-valves 14 separates upstream valve chamber part 34 and downstream valve chamber part 35, thereby stops useless ink and air to flow accordingly.Shown in Fig. 4 a, if useless ink and air flow to check-valves 14 from gear pump GP in this state, useless ink is introduced in the upstream valve chamber part 34, and upstream valve chamber part 34 is filled useless ink.This has increased the pressure in the upstream valve chamber part 34, so the difference of the pressure in pressure in the upstream valve chamber part 34 and the downstream valve chamber part 35 increases and surpasses reference value.Then shown in Fig. 4 (b), check-valves 14 separates projection 42 with contact portion 43.This makes upstream and downstream valve chamber part 34,35 communicate with each other, and allows useless ink and air flowing from upstream valve chamber part 34 to downstream valve chamber part 35.Simultaneously, deliver to the useless ink and the air of check-valves 14 from gear pump GP through pipe T3, flow into first path 38, upstream valve chamber part 34, intercommunicating pore 41, through hole 44, downstream valve chamber part 35, alternate path 39 and pipe T4 with the order of first path 38, upstream valve chamber part 34, intercommunicating pore 41, through hole 44, downstream valve chamber part 35, alternate path 39 and pipe T4.Then, useless ink and air flow in first ink cartridge 9.Shown in Fig. 4 (c), when gear pump GP stops and useless ink and air when flowing into first path 38 and suspending, pressure in the upstream valve chamber part 34 descends, and the difference between the pressure in pressure in the upstream valve chamber part 34 and the downstream valve chamber part 35 becomes and is equal to or less than reference value.In this stage, membrane portions 31 is by upwards (upstream the valve chamber part 34) distortion of spring members 33, and upwards promoted by the useless ink in the downstream valve chamber part 35.This causes the projection 42 contact contact portions 43 of membrane portions 31, thereby upstream valve chamber part 34 is separated with downstream valve chamber part 35.Thereby stopped the respective flow of useless ink and air.This has prevented that useless ink and air from turning back to upstream valve chamber part 34 from downstream valve chamber part 35.Therefore, waste liquid and air can not flow to gear pump GP.
As describing, only when because useless ink and air flow into pressure in the upstream valve chamber part 34 that causes in first ink cartridge 9 with the difference between the pressure in the downstream valve chamber part 35 during greater than reference value, check-valves 14 is just opened and is used for making give up ink and air to flow into first ink cartridge 9.Or rather, the printer 1 of first embodiment makes useless ink and air flow to first ink cartridge 9 through check-valves 14 from gear pump GP, will be sent to second ink cartridge 10 as the air of forced air.Thereby first and second ink cartridges 9,10 are provided the forced air that its pressure is not less than reference levels.The reference levels of pressure are corresponding to being used for effective pressurized ink bag B, C, M, Y, LC and LM and predetermined value.
In addition, useless ink and the air that flows to first ink cartridge 9 through check-valves 14 is prevented from flowing back to.Be different from traditional liquid injection apparatus, this has suppressed the pollution of record head 8.In addition, the pressure drop that flows into the forced air of first and second ink cartridges 9,10 is inhibited.
After this, will the operation of check-valves 14 be described.
When the gear pump GP of printer 1 was activated, gear pump GP was from useless ink of cover 12 suctions and air.Like this, useless ink and air flow into cover 12, pipe T2, gear pump GP, pipe T3, check-valves 14 and pipe T4 with the order of cover 12, pipe T2, gear pump GP, pipe T3, check-valves 14 and pipe T4, and are introduced in first ink cartridge 9.Then, as being used for pressurized ink bag B, C, M, Y, the forced air of LC and LM, air is sent to second ink cartridge 10 from first ink cartridge 9.More particularly, by through check-valves 14 air (forced air) being fed to first ink cartridge and second ink cartridge 9,10, the forced air that its pressure is not less than reference levels makes ink bag B, C, M, Y, LC and LM pressurization.In addition, the pressure drop of forced air is inhibited.When pressurization, ink bag B, C, M, Y, LC and LM deliver to record head 8 with the ink of respective color, print and carry out reliably.
First embodiment has following advantage.
(1) in first embodiment, check-valves 14 is constructed to prevent that useless ink and air from turning back to upstream valve chamber part 34 from downstream valve chamber part 35.This has suppressed the backflow to gear pump GP of useless ink and air.Thereby, being different from traditional liquid injection apparatus, the pollution of record head 8 is inhibited.In addition, the pressure drop that flows into the forced air of first and second ink cartridges 9,10 is inhibited, and the pressure of this air is kept effectively.Carried out reliably thereby print.
(2) in first embodiment, check-valves 14 is only just opened when useless ink and air flow to check-valves 14.Therefore, the pressure even printer 1 is not used considerable time in the downstream valve chamber part 35 equals atmospheric pressure, and upstream and downstream valve chamber part 34,35 is maintained at state separated from one another.When for example printer 1 was moved, this prevented that ink is back to cover 12.
(second embodiment)
Hereinafter with reference to Fig. 5 and Fig. 6 the second embodiment of the present invention is described.
In a second embodiment, be similar to the check-valves 14 of first embodiment, check-valves has suppressed the backflow to cover 12 of useless ink and air.Aspect the installation site of the framework 2 of printer 1, the check-valves of second embodiment is different from the check-valves 14 of first embodiment.Thereby the configuration of the check-valves of second embodiment is by corresponding modification.Therefore, the difference between first embodiment and second embodiment is absorbed in following description.Identical or similar label is used to indicate the parts of identical or similar second embodiment of the corresponding component with first embodiment.
As shown in Figure 5, gear pump GP is connected to cover 50 by check-valves 51 and pipe T13.First ink cartridge 9 is connected to gear pump GP through pipe T14.Be similar to first embodiment, by by cover 50 sealed-in nozzles surfaces 8a, starter receiver pump GP is used for nozzle N is applied negative pressure, and the nozzle N of nozzle surface 8a accepts cleaning.Useless ink that discharges in this cleaning and air flow into cover 50, check-valves 51, pipe T13, gear pump GP and pipe T14 with the order of cover 50, check-valves 51, pipe T13, gear pump GP and pipe T14.Be similar to first embodiment then, useless ink and air are introduced in first ink cartridge 9.In addition, delivered to second ink cartridge 10 as the air of forced air from first ink cartridge 9.This makes the ink bag B of first and second ink cartridges 9,10, C, and M, Y, LC and LM pressurization, thus ink feed is arrived record head 8.In cleaning, the ink that is fed to record head 8 is discharged into cover 50 by the nozzle N from record head 8.Or rather, as long as cover 50 has sealed nozzle surface 8a, printer 1 just forms closed cycle system.
Owing to be provided with check-valves 51 in a second embodiment, therefore the check-valves 14 between the gear pump GP and first ink cartridge 9 be not set.
Describe 51 configuration of the configuration of cover 50 and check-valves in detail below with reference to Fig. 6.
As shown in Figure 6, check-valves 51 is secured to the bottom of cover 50, and check-valves 51 forms one with cover 50.Cover 50 comprises shell 52, hermetic unit 53 and ink absorber 54.When the top is watched, shell 52 forms the shape of the similar thin case of determining rectangular shape, so that the nozzle N of covering nozzles surface 8a.Opening 52a is defined in the upper face of shell 52 (8a is relative with nozzle surface).Hermetic unit 53 forms around opening 52a in outstanding mode.Hermetic unit 53 is contact nozzle surface 8a closely, and by forming such as elastomeric flexible material.Be similar to first embodiment, closely contact with nozzle surface 8a by keeping hermetic unit 53, be used to utilize hermetic unit 53 and shell 52 covering nozzles surface 8a, cover 50 has sealed nozzle N.
Intercommunicating pore 55 extends by the bottom 52b of shell 52, and utilization is determined continuously from the cylinder exit portion 56 of the base projections of cover 50.Cover 50 is connected to check-valves 51 through exit portion 56.Therefore, the inside of cover 50 is by the internal communication of intercommunicating pore 55 with check-valves 51.The ring 57 that is formed by the flexible material such as rubber is engaged in more in the end near the exit portion 56 of check-valves 51.When cover 50 and check-valves 51 were combined together, ring 57 prevented that useless ink and air from revealing from bound fraction.Through opening 52a, the ink absorber 154 that is formed by the porous body such as sponge is inserted in the shell 52 of cover 50, thereby is accommodated in the shell 52.Ink absorber 54 absorbs and keeps from the ink of the nozzle N discharging of record head 8, and as required, through intercommunicating pore 55, ink is delivered to check-valves 51.
Intercommunicating pore 58 extends through the upper face (relative with cover 50) of the upper case part 30a of check-valves 51.Utilize the cover 50 combine with check-valves 51, through intercommunicating pore 55, intercommunicating pore 58 is connected internally to upstream valve chamber part 34 with cover 50.In a second embodiment, pipe T13 is connected to the connecting hole 37 of check-valves 51.
Therefore, through the upstream and downstream valve chamber part 34,35 of check-valves 51, useless ink and air are allowed to flow to pipe T13 from cover 50.
More particularly, be similar to first embodiment, pressure if gear pump GP is activated in the upstream valve chamber part 34 and the difference between the pressure in the downstream valve chamber part 35 surpass reference value, and upstream and downstream valve chamber part 34,35 is connected to each other.Therefore, forced air is sent to first ink cartridge and second ink cartridge 9,10.Or rather, though the check-valves 51 of second embodiment is positioned at the upstream (more near cover 50) of gear pump GP, as in first embodiment, its pressure is supplied to first and second ink cartridges 9,10 less than the forced air of reference levels.This makes ink bag B, C, M, Y, LC and LM pressurize effectively, thus with the ink feed of respective color to record head 8.Carried out reliably thereby print.As first embodiment being described, the reference levels of pressure are corresponding to being used for effective pressurized ink bag B, C, M, Y, LC and LM and predetermined value.
In addition, be similar to the check-valves 14 of first embodiment, check-valves 51 prevents that ink from turning back to upstream valve chamber part 34 or turning back to cover 50 from gear pump GP from downstream valve chamber part 35.Therefore, even be cleaning nozzle surface 8a, cover 50 sealed-in nozzles surface 8a, thus printer 1 forms closed cycle system, and useless ink and air also can be inhibited through the backflow of cover 50 to nozzle N.Thereby it is crescent to maintain the ink that forms among the nozzle N, and the ink injection is carried out effectively by nozzle N.Therefore, can further carry out printing reliably.In addition, be similar to first embodiment, the pressure drop that flows into the forced air of first and second ink cartridges 9,10 is inhibited and the pressure of air is kept effectively.
The present invention is not limited to illustrated embodiment, and can be modified as follows.
Though in a second embodiment, cover 50 and open valve 13 are not interconnected, and two parts can be connected to each other.In this case, require the structure of cover 50 to make amendment as requested.
In first embodiment, by check-valves 14 being connected to pipe T3, T4, check-valves 14 are disposed between the gear pump GP and first ink cartridge 9.Yet by check-valves 14 being connected to pipe T6, check-valves 14 can be set between first and second ink cartridges 9,10.This makes check-valves 14 further reliably the forced air of the not little reference levels of its pressure is fed to second ink cartridge 10.
In the embodiment shown, first ink cartridge 9 and second ink cartridge 10 are provided with separated from one anotherly.Yet first and second ink cartridges 9,10 can wholely form.In this case, require the structure of printer 1 to make amendment as required.
In the embodiment shown, be provided with first ink cartridge 9 and second ink cartridge 10.Yet independent ink cartridge can be set for ink bag B, C, M, Y, LC, and LM.In this case, ink cartridge is controlled separated from one anotherly, and can improve ink bag B, C, M, Y, the reliability of the ink that keeps among LC and the LM.In addition, by using a plurality of ink cartridges, increased the quantity of ink that is fed to record head 8.If ink cartridge is provided with by this way, require the structure of printer 1 to revise as required.
In the embodiment shown, ink absorber 17 is disposed in first ink cartridge 9.Yet other ink absorber 17 can be set in second ink cartridge 10.In this case, enter second ink cartridge 10 even work as useless ink, ink also can be absorbed by ink absorption material 17 very soon.
In the embodiment shown, first ink cartridge 9 holds ink bag B, and second ink cartridge 10 holds ink bag C, M, Y, LC, and LM.Yet the ink bag can any mode that other is fit to hold.Or rather, for example, first ink cartridge 9 can hold ink bag B and C; And second ink cartridge 10 can hold ink bag M, Y, LC, and LM.As selection, first or second ink cartridge 9,10 can comprise and the identical or different other ink bag of any ink bag color that is contained at first in the ink cartridge 9,10.In this case, require the configuration of printer 1 to revise as required, be used for ink feed with these colors to record head 8.
In the embodiment shown, ink jet device embodies as printer 1.Yet the present invention can be used as any liquid injection apparatus that other is fit to and realizes.For example, the present invention's liquid injection apparatus of can be used as injection such as the liquid of electrode material that is used to make LCD, EL display and surface emitting display or color material is realized.As selection, the present invention can be used as the liquid injection apparatus that sprays the liquid bio organic substance be used to make biochip or realizes such as the sample injection apparatus of accurate pipette.In every kind of these situations, the structure of first and second ink cartridges 9,10 can change as required.
Claims (12)
1. liquid injection apparatus comprises:
The jet head liquid that is used for atomizing of liquids;
Be used to receive cover from the waste liquid of described jet head liquid discharging;
Be used to keep the waste liquid box of described waste liquid; With
Be used for aspirating the gear pump that described waste liquid is also introduced this waste liquid described waste liquid box from described cover,
It is characterized in that: described device also comprises and is used to suppress the waste liquid backflow restraining device that described waste liquid is back to described cover.
2. device according to claim 1 is characterized in that: described waste liquid backflow restraining device is disposed between described waste liquid box and the described gear pump or between described gear pump and the described cover.
3. device according to claim 1 and 2 is characterized in that: described waste liquid backflow restraining device is formed by valve gear.
4. device according to claim 3, it is characterized in that: described device also comprises the liquid retainer, this liquid retainer keeps injected described liquid in the pressurized air pressurization, and this liquid is fed to described jet head liquid, wherein: described gear pump produces the described forced air that is used for described liquid retainer pressurization.
5. liquid injection apparatus comprises:
The jet head liquid that is used for atomizing of liquids;
The liquid retainer, this liquid retainer keeps being fed to described jet head liquid with injected described liquid and with described liquid in by the forced air pressurization; With
Be used to produce the gear pump that is used for the described forced air of described liquid retainer pressurization,
It is characterized in that: shown device also comprises the air backflow restraining device that allows described forced air only to be fed to described liquid retainer.
6. device according to claim 5 is characterized in that: described air backflow restraining device is disposed between described liquid retainer and the described gear pump or in the zone of the upstream of described gear pump.
7. according to claim 5 or 6 described devices, it is characterized in that: described air backflow restraining device is formed by valve gear.
8. liquid injection apparatus comprises:
The jet head liquid that is used for atomizing of liquids;
Be used to receive cover as the described liquid that sprays from described jet head liquid of waste liquid;
Be used for aspirating the gear pump of described waste liquid and described air from described cover; With
The liquid retainer, this liquid retainer has: be used to keep described waste liquid that is aspirated by described gear pump and the waste liquid retainer part that receives as the described air of forced air; Keep using described forced air will be supplied to the liquid retaining part of the described liquid of described jet head liquid with being used to,
It is characterized in that: described device also comprises and is used to suppress the fluid backflow restraining device that described waste liquid and described forced air are back to described cover.
9. device according to claim 8 is characterized in that: described fluid backflow restraining device is disposed between described liquid retainer and the described gear pump or between described gear pump and the described cover.
10. according to Claim 8 or 9 described devices, it is characterized in that: described liquid backflow restraining device is formed by valve gear.
11. according to each described device in the claim 4,7 and 10, it is characterized in that: described valve gear comprises:
Intake section, at least one of described waste liquid or described forced air are introduced in the described intake section;
Exit portion, described waste liquid or described forced air flow to the outside from described intake section by described exit portion; With
Valve body, be used for: if the pressure of described forced air is not less than predetermined reference level, described valve body is connected to each other described intake section and described exit portion, if and described waste liquid and described forced air turn back to described intake section from described exit portion, described valve body separates described intake section with described exit portion.
12. device according to claim 11, it is characterized in that: if the difference between the pressure in pressure in the described intake section and the described exit portion surpasses predetermined reference value, the described valve body of described valve gear is connected to each other described intake section and described exit portion, if and the described difference between the pressure in pressure in the described intake section and the described exit portion is equal to or less than this reference value, the described valve body of described valve gear separates described intake section with described exit portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP007370/2004 | 2004-01-14 | ||
| JP2004007370 | 2004-01-14 | ||
| JP100275/2004 | 2004-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1771133A true CN1771133A (en) | 2006-05-10 |
Family
ID=36751899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200580000258 Pending CN1771133A (en) | 2004-01-14 | 2005-01-14 | Liquid jetting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1771133A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102555504A (en) * | 2012-02-28 | 2012-07-11 | 珠海天威飞马打印耗材有限公司 | Printer ink recovery device and printer using same |
| CN103085478A (en) * | 2013-01-17 | 2013-05-08 | 南京协力电子科技集团有限公司 | Ink-jet system of printed circuit board ink-jet printer |
| CN103874582A (en) * | 2011-09-21 | 2014-06-18 | 柯尼卡美能达株式会社 | Inkjet recording apparatus |
| CN104321198A (en) * | 2013-02-08 | 2015-01-28 | 佩索纳斯Y技术有限公司 | Device and method for cleaning inkjet printheads |
| CN104309307A (en) * | 2014-10-02 | 2015-01-28 | 合肥海闻自动化设备有限公司 | Ink circulating system for tire digital printer |
| CN106256551A (en) * | 2015-06-17 | 2016-12-28 | 东芝泰格有限公司 | Circulating device for ink and inkjet recording device |
| CN107000444A (en) * | 2014-11-12 | 2017-08-01 | 惠普发展公司，有限责任合伙企业 | The printer liquid filling of unit is loaded using air |
| CN107009748A (en) * | 2016-01-08 | 2017-08-04 | 佳能株式会社 | Printing device |
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| CN109263276A (en) * | 2018-09-07 | 2019-01-25 | 合肥海闻自动化设备有限公司 | Recyclable ink test |
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| CN103874582A (en) * | 2011-09-21 | 2014-06-18 | 柯尼卡美能达株式会社 | Inkjet recording apparatus |
| CN103874582B (en) * | 2011-09-21 | 2015-11-25 | 柯尼卡美能达株式会社 | Ink-jet recording apparatus |
| CN102555504A (en) * | 2012-02-28 | 2012-07-11 | 珠海天威飞马打印耗材有限公司 | Printer ink recovery device and printer using same |
| CN103085478A (en) * | 2013-01-17 | 2013-05-08 | 南京协力电子科技集团有限公司 | Ink-jet system of printed circuit board ink-jet printer |
| CN103085478B (en) * | 2013-01-17 | 2015-04-29 | 南京协力电子科技集团有限公司 | Ink-jet system of printed circuit board ink-jet printer |
| CN104321198A (en) * | 2013-02-08 | 2015-01-28 | 佩索纳斯Y技术有限公司 | Device and method for cleaning inkjet printheads |
| CN104321198B (en) * | 2013-02-08 | 2016-08-31 | 佩索纳斯Y技术有限公司 | For cleaning the system and method for ink jet printing head |
| CN104309307A (en) * | 2014-10-02 | 2015-01-28 | 合肥海闻自动化设备有限公司 | Ink circulating system for tire digital printer |
| CN107000444B (en) * | 2014-11-12 | 2018-07-03 | 惠普发展公司，有限责任合伙企业 | It is loaded using the printer liquid of air filling unit |
| CN107000444A (en) * | 2014-11-12 | 2017-08-01 | 惠普发展公司，有限责任合伙企业 | The printer liquid filling of unit is loaded using air |
| US10052881B2 (en) | 2014-11-12 | 2018-08-21 | Hewlett-Packard Development Company, L.P. | Printer fluid priming using multiple air priming units |
| CN106256551A (en) * | 2015-06-17 | 2016-12-28 | 东芝泰格有限公司 | Circulating device for ink and inkjet recording device |
| CN107009748A (en) * | 2016-01-08 | 2017-08-04 | 佳能株式会社 | Printing device |
| CN107009748B (en) * | 2016-01-08 | 2020-01-21 | 佳能株式会社 | Printing apparatus |
| CN107215100A (en) * | 2016-03-22 | 2017-09-29 | 精工爱普生株式会社 | Clean liquid supply unit and the droplet ejection apparatus including it |
| CN109263276A (en) * | 2018-09-07 | 2019-01-25 | 合肥海闻自动化设备有限公司 | Recyclable ink test |
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