CN106956515A - Liquid discharging head and liquid discharge apparatus - Google Patents

Abstract

The present invention relates to a kind of liquid discharging head and liquid discharge apparatus.The liquid discharging head includes：Recording element substrate, it includes：Outlet, for discharging liquid, recording element, the energy for generating to discharge liquid, balancing gate pit, it is internal with the recording element, liquid supply passage, for liquid to be supplied to the balancing gate pit, and liquids recovery passage, for from balancing gate pit's withdrawal liquid；And supporting member, for supporting the recording element substrate, the supporting member includes：Supply chamber, for liquid to be supplied to the liquid supply passage, and recovery room, for from the liquids recovery passage withdrawal liquid.The inner volume of the recovery room is less than the inner volume of the supply chamber.

Description

Liquid discharging head and liquid discharge apparatus

Technical field

The present invention relates to the liquid discharge apparatus of a kind of liquid discharging head and the use liquid discharging head.

Background technology

Liquid discharging head is used by liquid discharge apparatus liquid being discharged in recording medium to be recorded, wherein The liquid discharging head has the balancing gate pit connected with outlet and the record for providing the energy to the liquid in discharge pressure room Element.Discharged as the ink jet recording device of the representative of liquid discharge apparatus from outlet and be used as such as dye included in solvent The record liquid of the color material of material or pigment etc. and treatment fluid for adjusting record liquid etc..For example in this liquid discharge apparatus, In the case that the liquid to be discharged is record liquid, the volatile component potential evaporation in record liquid near outlet, therefore color The concentration increase of material, thus causes to record the irregular color in image.It there is also situations where：The evaporation of volatile component increases The big viscosity of liquid of the outlet nearby and in balancing gate pit, it reduce the velocity of discharge of liquid, therefore liquid can not be accurate Ground reaches the desired locations in recording medium.A known measure for tackling this problem is liquid is arranged via liquid Lift one's head and be particularly circulated via balancing gate pit.In the case where liquid will be circulated via balancing gate pit, set from shared and supply To channel branch, through balancing gate pit and in the passage at shared recovery approach interflow, so that liquid passes through pressure via these passages Power room is circulated.It is provided for driving the drive circuit of recording element in liquid discharging head, and in the quantity of outlet In the case that the quantity of big and recording element is also big, the increase of the influence of the heating caused by drive circuit is also possible to meeting Cause the change of the velocity of discharge of liquid, and be likely difficult to carry out the accurate discharge for recording medium.For example, Japanese Unexamined Patent Application Publication (patent of PCT translators of Japanese is disclosed) 2003-519027 discloses following configuration：The heat generated at drive circuit is guided Away from the liquid of recovery approach is circulated and transferred to via balancing gate pit, so as to suppress the viscous of the liquid caused by temperature rises The change of degree, thus suppresses the change of the velocity of discharge of liquid.

In the structure waited described by Japanese Unexamined Patent Application Publication 2003-519027, supplied from feed path to balancing gate pit In the case that the flow of liquid is less than the flow for the liquid discharged from outlet, the liquid from recovery approach when being discharged Body adverse current is simultaneously flowed into balancing gate pit.It means that being heated due to carrying out the hot transmission of driving circuit etc. and becoming viscous In the fluid inflow pressure room for spending reduction, therefore the discharge characteristic changing of discharge rate and the velocity of discharge etc..As a result, matter is recorded Amount is affected, the part that the concentration such as recorded is recorded on the recording medium in start recording and the part recorded later Compared to dimmed etc..This is to discharge characteristic according to the change of the driving condition of liquid discharging head (in this case to be followed from standby Change from ring status to recording status) and change and an example also changing of recording quality.On the other hand, logical from supply Road is supplied be more than the flow of liquid discharged from outlet to the flow of the liquid of balancing gate pit in the case of, even in being arranged When going out liquid also not from recovery approach countercurrently.However, in this case, at balancing gate pit and the pressure of neighbouring passage declines Greatly, it is therefore desirable to the channel width of balancing gate pit and neighbouring passage is become big, this makes it difficult to balancing gate pit being configured to high density simultaneously And carry out the record of fine definition.

The content of the invention

It has been found that expect to provide a kind of liquid discharging head and liquid discharge apparatus, wherein, in the liquid discharging head and this In liquid discharge apparatus, it is suppressed that heated up when driving condition changes liquid also from recovery approach countercurrently, and thus press down The change of the driving condition of influence discharge characteristic is made.

A kind of liquid discharging head, including：Recording element substrate, it includes：Outlet, for discharging liquid, recording element, Energy for generating to discharge liquid, balancing gate pit, it is internal to have a recording element, liquid supply passage, for will Liquid is supplied to the balancing gate pit, and liquids recovery passage, for from balancing gate pit's withdrawal liquid；And supporting member, For supporting the recording element substrate, the supporting member includes：Supply chamber, is supplied for liquid to be supplied to the liquid Passage, and recovery room, for from the liquids recovery passage withdrawal liquid.The inner volume of the recovery room is less than the supply The inner volume of room.

A kind of liquid discharging head, including：Recording element substrate, wherein being set on the first face of the recording element substrate There are multiple recording elements, multiple recording elements are used to generate the energy to discharge liquid；Partition wall, it is configured adjacent Recording element between；And outlet, it is configured for recording element each described, and in face of the record member Part, wherein, multiple outlets are arranged in rows to form outlet row, and the partition wall is utilized for each recording element To form balancing gate pit, and the recording element is utilized to discharge the liquid in the balancing gate pit, the liquid from the outlet Discharge head is additionally provided with：Liquid supply passage, it is arranged on the second face of the recording element substrate, and with it is multiple described Balancing gate pit is connected, liquids recovery passage, and it is arranged on second face, and is connected with multiple balancing gate pits, is shared and is supplied To passage, for liquid to be supplied to the balancing gate pit, recovery approach is shared, it is multiple for from balancing gate pit's withdrawal liquid Supply chamber, it is connected with the common feed path and the liquid supply passage, and multiple recovery rooms, and it is shared with described Recovery approach is connected with the liquids recovery passage, the direction alternating of the supply chamber and the recovery room along the outlet row Ground is arranged in the common feed path, the region that the shared recovery approach and the recording element substrate are limited, Under the holding state for not discharging liquid, according to the pressure differential between the common feed path and the shared recovery approach, Formed and returned from the common feed path via the supply chamber, the liquid supply passage, the balancing gate pit, the liquid Receive passage, the recovery room and reach the shared recovery approach liquid stream, and at least one recovery room is interior Volume is less than the inner volume of the supply chamber adjacent with the recovery room.

A kind of liquid discharge apparatus, including：Liquid discharging head, it includes：Recording element substrate, it includes：Outlet, is used In discharge liquid, recording element, the energy for generating to discharge liquid, balancing gate pit, it is internal to have the recording element, Liquid supply passage, for liquid to be supplied to the balancing gate pit, and liquids recovery passage, for being reclaimed from the balancing gate pit Liquid, supporting member, for supporting the recording element substrate, the supporting member includes：Supply chamber, for liquid to be supplied To the liquid supply passage, and recovery room, for from the liquids recovery passage withdrawal liquid, and with being supplied than described The small inner volume of inner volume to room；Storage element, for storing liquid；First circulation system, for making liquid from the storage Memory cell is circulated to common feed path；And second circulation system, for making liquid be reclaimed from the storage element to shared Channel cycle.

By the way that below with reference to explanation of the accompanying drawing to exemplary embodiments, further feature of the invention will be apparent.

Brief description of the drawings

Fig. 1 is the figure for the schematic construction for showing the liquid discharge apparatus according to first structure example.

Fig. 2 is the figure for showing first circulation configuration.

Fig. 3 is the figure for showing second circulation configuration.

Fig. 4 A and 4B are the stereograms for the structure for showing liquid discharging head.

Fig. 5 is the exploded perspective view of liquid discharging head.

Fig. 6 A~6F is the figure of the structure for the front and back for showing channel component.

Fig. 7 is the perspective view for showing the relation between passage.

Fig. 8 is the sectional view for showing channel component and discharge module.

Fig. 9 A and 9B are the figures for illustrating to discharge module.

Figure 10 A~10C is the figure for the structure for showing recording element substrate.

Figure 11 is the fragmentary perspective cross sectional view for the structure for showing recording element substrate.

Figure 12 is the plan for showing adjacent recording element substrate.

Figure 13 is the figure for the schematic construction for showing the liquid discharge apparatus according to the second topology example.

Figure 14 A and 14B are the stereograms for the structure for showing liquid discharging head.

Figure 15 is the exploded perspective view of liquid discharging head.

Figure 16 A~16E is the figure for the structure for showing channel component.

Figure 17 is the stereogram for showing the annexation in channel component.

Figure 18 is the sectional view for showing passage formation component and discharge module.

Figure 19 A and 19B are the figures for illustrating to discharge module.

Figure 20 A~20C is the figure for the structure for showing recording element substrate.

Figure 21 is the stereogram for illustrating the liquid deliverying unit in liquid discharging head according to embodiments of the present invention.

Figure 22 is the stereogram for discharging module.

Figure 23 A~23C is the exploded perspective view of recording element substrate.

Figure 24 A and 24B are for illustrating the balancing gate pit in recording element substrate and the figure of outlet.

Figure 25 A and 25B are the figures for illustrating the loop configuration in liquid discharge apparatus.

Figure 26 A and 26B are sections for showing supply liquid chamber and withdrawal liquid room according to the first example and the first comparative example Face figure.

Figure 27 is the figure for schematically showing the change of pressure room temperature over time.

Figure 28 is to show the supply liquid chamber and the sectional view of withdrawal liquid room according to the second comparative example.

Figure 29 A and 29B are the figures for schematically showing the pressure distribution at liquid supply passage and liquids recovery passage.

Figure 30 A and 30B are the sectional views for illustrating the second example.

Figure 31 is to show the supply liquid chamber and the sectional view of withdrawal liquid room according to the 3rd comparative example.

Figure 32 is to show the supply liquid chamber and the sectional view of withdrawal liquid room according to the 4th comparative example.

Figure 33 is the schematic section of the state of bubble when filled with liquid.

Figure 34 is the sectional view for illustrating liquid filling method.

Embodiment

Illustrate below with reference to accompanying drawing present invention can apply to topology example and embodiment.It should be appreciated that following Illustrate without limitation the scope of the present invention.As an example, so-called hot mode liquid discharging head is will be described below, wherein should Hot mode liquid discharging head using heater element as the energy for generating to discharge liquid recording element, by using Heat produces bubble to discharge liquid from outlet in the liquid in balancing gate pit.However, present invention can apply to liquid discharge Head is not limited to hot mode, and present invention could apply to using the piezo electrics and other all kinds using piezoelectric element Liquid discharge mode liquid discharging head.According to the liquid discharging head and tool that are used to discharge the liquid of ink etc. of the present invention The liquid discharge apparatus for having the liquid discharging head can be applied to such as printer, copying machines, the picture unit with communication system With the equipment of the word processing device with printer unit etc., and apply also for complex method and various processing unit phase groups The industrial recording apparatus of conjunction.For example, the present invention can be used to make biochip, printed electronic circuit, make semiconductor substrate With other this purposes.

Although the following description, which is related to, makes what the liquid for recording liquid etc. was circulated between reservoir and liquid discharging head Liquid discharging head 3 used in liquid discharge apparatus, but use the liquid discharge apparatus of the liquid discharging head according to the present invention Not limited to this.Present invention could apply to the following configuration of liquid discharge apparatus：Instead of making liquid circulation, two reservoirs are set (one positioned at the upstream side of liquid discharging head and another is located at downstream), and by making liquid via liquid discharging head Flow to flow the liquid in the balancing gate pit of liquid discharging head from a reservoir to another reservoir.

In addition, the following description is related to length so-called row type (page width type) head corresponding with the width of recording medium, But it is also possible to apply the invention to complete the record in recording medium by the scanning along main scanning direction and sub-scanning direction So-called serial type liquid discharging head.The example of serial type liquid discharging head be have respectively for record black recording liquid and For recording colour record liquid a recording element substrate liquid discharging head, but this and it is nonrestrictive.Serial type liquid The example for discharging head can be following configuration：Form the short formula row type head shorter than the width of recording medium, plurality of record It is overlapping on outlet line direction that device substrate is arranged in mouth, and these short formula row type heads are scanned on the recording medium.

According to the explanation of the liquid discharging head equipment of first structure example

First, as the example of the liquid discharge apparatus according to the present invention, explanation is made by that will record liquid from outlet The ink jet recording device 1000 (being also referred to as below " recording equipment ") for being discharged in recording medium to be recorded for liquid.Figure 1 is shown as the schematic construction of the recording equipment 1000 according to the liquid discharge apparatus of first structure example.Recording equipment 1000 Configured with the supply unit 1 for conveying recording medium 2 and in the mode substantially vertical with the conveying direction of recording medium 2 Row type liquid discharging head 3, and be to be used to carry out single pass while multiple recording medium 2 are continually or intermittently conveyed (pass) continuous recording row type recording equipment.Recording medium 2 is not limited to cut thin slice, and can be that continuous reel is thin Piece.Liquid discharging head 3 can record liquid (these colors using the colored of cyan (C), magenta (M), yellow (Y) and black (K) Also it is collectively referred to as CMYK) carry out panchromatic printing.As it is explained in detail hereinafter, liquid discharging head 3 by fluidly connect be connected to be used as with Configuration, main reservoir and buffer reservoir are supplied (referring to figure in the liquid for the feed path that liquid is supplied to liquid discharging head 3 2).Shown in Fig. 2 as will be described later, liquid discharging head 3 can be approximately separated into fluid supply unit 220, vacuum cavitations list Member 230 and liquid deliverying unit 300.Set multiple recording element substrates 10 and common feed logical to liquid deliverying unit 300 Road 211 and shared recovery approach 212, wherein setting multiple recording elements to each recording element substrate 10.Discharged in liquid single In member 300, as indicated by the arrows of fig. 2, the supply record liquid from common feed path 211 to recording element substrate 10, and utilize Share recovery approach 212 and reclaim the record liquid.Liquid discharging head 3 is also electrically connected to for electric power and discharge control signal to be passed Transport to the electric control unit of liquid discharging head 3.The liquid path in discharge first 3 and electric signal road are will be explained in below Footpath.

The explanation of first circulation configuration

Fig. 2 is shown as being applied to first following for the form of the circulating path structure of the liquid discharge apparatus according to the present invention Ring is configured.In first circulation configuration, liquid discharging head 3 is connected on high-tension side first circulation pump by fluidly connecting 1001st, first circulation pump 1002 and buffer reservoir 1003 of low-pressure side etc..Although in order to which interest of clarity, Fig. 2 only show CMYK Color it is respective record liquid in a color record liquid flowing institute via path, but in fact, liquid discharging head 3 and remember Recording apparatus master unit is provided with the circulating path of four colors.As the slow of the auxiliary reservoir being connected with main reservoir 1006 Rushing reservoir 1003 has the function for the storage element for being used to store record liquid, and has atmosphere connection port (not shown), by The inside and outside connection of this reservoir, and the bubble recorded in liquid can be discharged to the outside.Buffer reservoir 1003 is also It is connected to replenishment pump 1005.Discharged for example recording liquid by the outlet discharge (ejection) from liquid discharging head 3 in liquid In the case that consumable liquid is to be recorded or attracted recovery etc. in first 3, replenishment pump 1005 is used for will be identical with the amount consumed The record liquid of amount transfer to buffer reservoir 1003 from main reservoir 1006.

Two first circulation pumps 1001 and 1002 are used for the extracting liq of fluid connection 111 from liquid discharging head 3, and The liquid is set to flow to buffer reservoir 1003.First circulation pump 1001 and 1002 is preferably the volume with quantitative liquor charging ability Type pump.Specific example can include tube pump, gear pump, membrane pump and syringe pump etc..For example, it is also possible to using passing through going out in pump Mouth configures the permanent flow valve commonly used and safety valve to ensure the configuration of constant flow rate.In just driving liquid deliverying unit 300, high pressure It is logical that the first circulation pump 1001 of side and the first circulation pump 1002 of low-pressure side each make the record liquid of constant basis flow through common feed Road 211 and shared recovery approach 212.It is preferred that being the temperature between the recording element substrate 10 of liquid discharging head 3 by the flow set Degree difference is not interfered with more than the degree of the recording image quality in recording medium 2.On the other hand, if the flow was set to Height, the then influence that the pressure in the passage in liquid deliverying unit 300 declines causes to produce between recording element substrate 10 Big Negative Pressure Difference, this causes to produce uneven concentration in record image.It is therefore preferable that in view of between recording element substrate 10 Temperature difference and Negative Pressure Difference flow is set.Record liquid be circulated via path in, including on high-tension side first follow The path of ring pump 1001 constitutes the first circulation system in liquid discharge apparatus, and the first circulation pump 1002 including low-pressure side Path constitute liquid discharge apparatus in second circulation system.

Second circulation pump 1004 is being set on the path of supply record liquid from buffer reservoir 1003 to liquid discharging head 3. Vacuum cavitations unit 230 is configured on the path between second circulation pump 1004 and liquid deliverying unit 300.Vacuum cavitations unit 230 serve it is as follows：In the case that the flow of the circulatory system is fluctuated due to the difference of dutycycle when record, it can also make The pressure in the downstream (that is, the side of liquid deliverying unit 300) of vacuum cavitations unit 230 is maintained at default constant pressure.Negative pressure Control unit 230 has two pressure adjustmenting mechanisms for being each arranged to different control pressures.Any mechanism can be used As the two pressure adjustmenting mechanisms, as long as can be with desired setting pressure by the Stress control in the downstream of the mechanism Centered on constant range below in fluctuate.As an example, it can use and be equal with so-called " pressure reducing regulator " Mechanism.In the case where using pressure reducing regulator as pressure adjustmenting mechanism, as shown in Fig. 2 preferably by second circulation pump 1004 pressurize via fluid supply unit 220 to the upstream side of vacuum cavitations unit 230.So make it possible to suppress buffering liquid storage Influence of the head pressure of device 1003 to liquid discharging head 3, so as to provide the buffer reservoir 1003 in recording equipment 1000 The bigger free degree of layout.When driving liquid discharging head 3 in the range of the circular flow of used record liquid, second circulation Pump 1004 has more than certain lift pressure, this it is sufficient that, and Scroll-type pump and volume type pump etc. can be used.Specifically Ground, can use membrane pump etc..Alternatively, instead of second circulation pump 1004, it is, for example, possible to use with relative to vacuum cavitations list The head reservoir that the mode that member 230 has certain head difference is configured.

In two pressure adjustmenting mechanisms in vacuum cavitations unit 230, (shown in Fig. 2 H) relatively high pressure sets side Pressure adjustmenting mechanism common feed path 211 in liquid deliverying unit 300 is connected to via fluid supply unit 220.Together Sample, (shown in Fig. 2 L) relatively low pressure sets the pressure adjustmenting mechanism of side to be connected to liquid row via fluid supply unit 220 The shared recovery approach 212 gone out in unit 300.In addition to common feed path 211 and shared recovery approach 212, liquid discharge is single Member 300 is additionally provided with the individual feed path 213 and individual recovery approach 214 each connected with recording element substrate 10.Will be each Individual feed path 213 and individual recovery approach 214 set by recording element substrate are referred to as " individual passage ".These individuals Passage is to collaborate from the branch of common feed path 211 and at shared recovery approach 212 and be connected with the two passages What mode was set.Therefore, occurs following flowing：A part for the liquid of record liquid etc. flows from common feed path 211 The inside of recorded device substrate 10, and flow to shared recovery approach 212 (being shown using Fig. 2 hollow arrow).Its reason It is：On high-tension side pressure adjustmenting mechanism H is connected to common feed path 211, and the pressure adjustmenting mechanism L connections of low-pressure side To shared recovery approach 212, therefore pressure differential is produced between two common-use tunnels.

Thus, following flowing occurs in liquid deliverying unit 300：Common feed path 211 is flowed through in liquid and is shared While recovery approach 212 is respective, a part for the liquid passes through recording element substrate 10.Therefore, recording element substrate 10 is produced Raw heat can be discharged by the flowing via common feed path 211 and shared recovery approach 212 from recording element substrate 10 To outside.The structure also allows for wanting when just being recorded using liquid discharging head 3, without using in outlet and balancing gate pit The flowing of the record liquid of generation is recorded, thus can suppress to evaporate at these positions due to recording the Vehicle Composition of liquid And cause the viscosity for recording liquid to uprise.Shared back furthermore, it is possible to which the foreign matter in the record liquid after thickening and record liquid is expelled to Receive passage 212.Therefore, recorded with making it possible to high speed and high image quality using above-mentioned liquid discharging head 3.

The explanation of second circulation configuration

Fig. 3 be show to be applied in the loop configuration structure according to the liquid discharge apparatus of the present invention as with above-mentioned the The schematic diagram of the second circulation configuration of the different loop configuration of one loop configuration.Second circulation configuration is followed relative to above-mentioned first Ring configuration main difference be：Two pressure adjustmenting mechanisms for constituting vacuum cavitations unit 230 are all to by negative pressure control The Stress control of the upstream side of unit 230 processed is into the mechanism that fluctuates in the constant range centered on expecting to set pressure.This The mechanism part operated with so-called " back pressure regulator " identical can be configured with by planting pressure adjustmenting mechanism.Second circulation pump 1004 are used as the negative pressure source depressurize the downstream of vacuum cavitations unit 230, and on high-tension side first circulation pump 1001 The upstream side of liquid discharging head 3 is configured at the first circulation pump 1002 of low-pressure side.Therefore, vacuum cavitations unit 230 is configured at The downstream of liquid discharging head 3.

When being recorded using liquid discharging head 3, the feelings that flow is fluctuated due to the difference of record dutycycle Under condition, the vacuum cavitations unit 230 configured according to second circulation be also used for making the upstream side of itself pressure oscillation maintain with In constant range centered on preset pressure.Here, the upstream side of vacuum cavitations unit 230 is the side of liquid deliverying unit 300.Such as Shown in Fig. 3, the downstream of vacuum cavitations unit 230 is entered via fluid supply unit 220 preferably by second circulation pump 1004 Row pressurization.So make it possible to suppress influence of the head pressure of buffer reservoir 1003 to liquid discharging head 3, so as to provide pin To the bigger range of choice of the layout of the buffer reservoir 1003 in recording equipment 1000.Alternatively, instead of second circulation pump 1004, the head reservoir for example configured in the way of it there is specific head difference relative to vacuum cavitations unit 230 can be used.

To configure identical mode with first circulation, the vacuum cavitations unit 230 shown in Fig. 3, which has, is provided with different from each other Control pressure two pressure adjustmenting mechanisms.(shown in Fig. 3 H) high pressure sets side and (shown in Fig. 3 L) low pressure to set The pressure adjustmenting mechanism of side is connected to the common feed path in liquid deliverying unit 300 via fluid supply unit 220 respectively 211 and shared recovery approach 212.It is relatively higher than the pressure of common feed path 211 using the two pressure adjustmenting mechanisms The pressure of recovery approach 212 is shared, thus occurs following flowing：Liquid is recorded from common feed path 211 via individual passage Recovery approach 212 is shared with the inner passage flow direction in recording element substrate 10.The record in Fig. 3 is represented using hollow arrow The flowing of liquid.Thus, second circulation configuration produces the flowing of the record liquid configured with first circulation in liquid deliverying unit 300 State identical records the flow regime of liquid, but has a case that two advantages different from first circulation configuration.

One advantage is as follows：Configured using second circulation, vacuum cavitations unit 230 is configured at the downstream of liquid discharging head 3 The risk that influent is discharged first 3 by the dust and foreign matter produced at side, therefore vacuum cavitations unit 230 is smaller.

Second advantage is as follows：Compared with the situation that first circulation is configured, in second circulation path, from buffer reservoir The maximum of the 1003 required flows supplied to liquid discharging head 3 can be smaller.Reason is as follows.It will be represented using A in record Standby period be circulated in the case of total flow in common feed path 211 and shared recovery approach 212.A value is determined Justice is the temperature in liquid deliverying unit 300 is made in the case of recording the temperature adjustment of standby period progress liquid discharging head 3 Difference maintains minimum discharge required in expected range.In addition, note will discharged from all outlets of liquid deliverying unit 300 Delivery flow in the case of record liquid (full discharge) is defined as F.Therefore, in the case where first circulation is configured (Fig. 2), first follows The setting flow of ring pump (high-pressure side) 1001 and first circulation pump (low-pressure side) 1002 is A, thus needed for full discharge to liquid The maximum of the liquid quantity delivered of discharge first 3 is A+F.On the other hand, in the case of Fig. 3 second circulation configuration, record is treated During machine it is required to the liquid quantity delivered of liquid discharging head 3 be flow A.This means needed for full discharge to liquid discharging head 3 Quantity delivered be flow F.Therefore, in the case where second circulation is configured, on high-tension side first circulation pump 1001 and and low-pressure side First circulation pump 1002 setting flow aggregate value, i.e. needed for the maximum of quantity delivered be higher value in A and F.Thus, As long as using mutually isostructural liquid deliverying unit 300, the maximum (A or F) of the required quantity delivered in second circulation configuration is just The maximum (A+F) for the required quantity delivered being consistently less than in first circulation configuration.As a result, in the case where second circulation is configured, The free degree relevant with adaptable circulating pump is higher, and can use inexpensive circulating pump simple in construction, can drop It is low for the load of the cooler (not shown) configured on master side path, thus reduce recording equipment master unit into This.The advantage becomes apparent in the case of the relatively large line style head of A or F value, and on the long side direction of line style head Length is longer, and the advantage is more useful.

However, on the other hand, exist first circulation configuration with second circulation configure compared to more advantage what time.Utilize Two loop configurations, flow through the maximum flow of liquid deliverying unit 300 when recording standby, thus the record dutycycle of image is lower, Application is bigger to the negative pressure of nozzle.Therefore, particularly the channel width of common feed path 211 and shared recovery approach 212 is made Degree reduces so as in the case of head width reduction, in easily visible uneven low duty ratio image, may apply to nozzle High negative pressure, this may increase the influence of satellite droplet.Note, the passage of common feed path 211 and shared recovery approach 212 Width is the length on the direction vertical with the flow direction of liquid, and head width is on the short side direction of liquid discharging head 3 Length.On the other hand, in the case where first circulation is configured, high pressure is applied to nozzle when forming high duty ratio image, because And any satellite droplet produced by record image is less substantially, this is in small this aspect of influence for picture quality Favourable.Can according to liquid discharging head 3 and recording equipment master unit specification (delivery flow F, minimal circulation flow A and liquid Body discharges the channel impedance in first 3) come to select which of the two loop configurations loop configuration be preferred.

The explanation of the structure of liquid discharging head

Then, first 3 structure will be discharged with reference to prescribed liquid for Fig. 4 A and 4B.Fig. 4 A are as from being formed with outlet 13 The stereogram for the liquid discharging head 3 that the side in face is watched, and Fig. 4 B are the stereograms from the side opposite with Fig. 4 A.Liquid It is that can discharge 15 that record liquid of cyan (C), magenta (M), yellow (Y) and black (K) this four colors that body, which discharges first 3, Recording element substrate 10 is arranged in a linear the row type liquid discharging head of (in-line arrangement layout).As shown in Figure 4 A, liquid discharging head 3 is wrapped Include 15 recording element substrates 10, flexible printed circuit board 40 and electric wiring base plates 90.Electric wiring base plates 90 are provided with defeated Enter terminal 91 and power supply terminal 92, wherein input terminal 91 and power supply terminal 92 are via electric wiring base plates 90 and soft Property printed circuit board (PCB) 40 is electrically connected to recording element substrate 10.Input terminal 91 and the electrical connection of power supply terminal 92 are extremely remembered The control circuit of recording apparatus 1000, and drive signal and the required power supply of discharge will be discharged respectively to recording element base Plate 10.Wiring is integrated using the electric circuit in electric wiring base plates 90, this causes input terminal 91 and power supply terminal 92 quantity can be reduced compared with the quantity of recording element substrate 10.So make it possible to reduce by 3 groups of liquid discharging head The quantity of electric connection part removed is needed when being filled to recording equipment 1000 or when changing liquid discharging head 3.Such as Fig. 4 B institutes Show, the fluid connection 111 set by the two ends of liquid discharging head 3 is connected with the liquid-supplying system of recording equipment 1000. Therefore, the feed system of the record liquid from recording equipment 1000 of CMYK this four colors is supplied to liquid discharging head 3, and will The record liquid for having passed through liquid discharging head 3 is recycled to the feed system of all recording equipments 1000 waited as shown in figures 2 and 3.So, The record liquid of each color can be circulated via the path of recording equipment 1000 and the path of liquid discharging head 3.

Fig. 5 shows to constitute each part of liquid discharging head 3 and the exploded perspective view according to its function of unit.Liquid is discharged First 3 have housing 80, and the housing 80 is provided with liquid deliverying unit 300, fluid supply unit 220 and electric wiring base plates 90.To fluid supply unit 220, fluid connection 111 (referring to Fig. 2~4B) is set, and in fluid supply unit 220 Portion sets being used for each open communication of fluid connection 111 to remove the foreign matter in supplied record liquid for each color Filter 221 (referring to Fig. 2 and 3).In the configuration shown in Fig. 5, two liquid are set to supply to a liquid discharging head 3 single Member 220 and two vacuum cavitations units 230.In liquid discharging head 3, two fluid supply units 220 are each provided with being directed to The filter 221 of two colors.The record liquid for having passed through filter 221 is supplied to institute on corresponding fluid supply unit 220 Each vacuum cavitations unit 230 set.Each vacuum cavitations unit 230 has pressure adjustmenting mechanism, and is adjusted by pressure The effect of set valve and spring member etc., makes the recording equipment 1000 occurred due to the fluctuation of the flow of liquid in mechanism Feed system (feed system of the upstream side of liquid discharging head 3) in pressure decline change substantially decay.Therefore, negative pressure Control unit 230 can make the change of the negative pressure in the downstream (side of liquid deliverying unit 300) of these vacuum cavitations units 230 steady Determine within the specific limits.As described above, two pressure-regulating valves are built-in with for each vacuum cavitations unit 230 of each color, its In these pressure-regulating valves be each arranged to different control pressures.On high-tension side pressure adjustmenting mechanism and liquid deliverying unit Common feed path 211 in 300 is connected, and the pressure adjustmenting mechanism of low-pressure side is connected with shared recovery approach 212.

Housing 80 is configured to include liquid deliverying unit supporting member 81 and electric wiring base plates supporting member 82 and propped up Liquid deliverying unit 300 and electric wiring base plates 90 are supportted, and ensure the rigidity of liquid discharging head 3.Electric wiring base plates are supported Component 82 is used to support electric wiring base plates 90, and is fixed by screwing to liquid deliverying unit supporting member 81. Liquid deliverying unit supporting member 81 is used to correct warpage and the deformation of liquid deliverying unit 300, and is consequently for ensuring multiple The relative positional accuracy of recording element substrate 10, thus suppresses uneven in record thing.Therefore, liquid deliverying unit support structure Part 81 preferably has sufficiently rigidity.The example of suitable material includes the metal material and such as oxygen of stainless steel and aluminium etc. Change ceramics of aluminium etc. etc..The both ends of the long side direction of liquid deliverying unit supporting member 81, which have, inserts joint rubber component 100 opening 83 and 84.The liquid of the record liquid etc. supplied from fluid supply unit 220 by joint rubber component 100, And it is directed to the third channel component 70 described below as the part for constituting liquid deliverying unit 300.

Liquid deliverying unit 300 includes multiple discharge modules 200 and passage formation component 210, and discharges list to liquid The face of the record-oriented medium of member 300 is installed by The lid component 130.The lid component 130 is that have to be provided with long opening 131 as shown in Figure 5 Frame-shaped surface component, wherein recording element substrate 10 and containment member 110 (Fig. 9 A) included in discharge module 200 Expose from opening 131.Frame portion around opening 131 has outlet with the formation that liquid discharging head 3 is covered when noting down standby Face cap component used by contact surface.It is therefore preferable that in covering, by using adhesive, sealant or noggin piece etc. Around coating opening 131 closing space is formed with the bumps on the outlet face of liquid filling body deliverying unit 300 and gap.

Then, the structure of passage formation component 210 included in liquid deliverying unit 300 will be illustrated.Passage formation structure Part 210 makes the liquid of the record liquid supplied from fluid supply unit 220 etc. distribute to each discharge module 200, and makes The liquid being recycled for from discharge module 200 is back to fluid supply unit 220.Passage formation component 210 is by such as Fig. 5 institutes Show and first passage component 50, second channel component 60 and third channel component 70 are sequentially laminated formed object, and profit It is screwed to liquid deliverying unit supporting member 81.So inhibit warpage and the deformation of passage formation component 210.

Fig. 6 A~6F is the passage for showing to constitute first passage component 50, second channel component 60 and third channel component 70 The figure of the front and back of component.Fig. 6 A show to be provided with the side of the first passage component 50 of discharge module 200, and Fig. 6 F show Go out the face being in contact with liquid deliverying unit supporting member 81 of third channel component 70.Fig. 6 B show first passage component 50 With the contact surface of second channel component 60, and Fig. 6 C being connect with first passage component 50 of correspondingly showing second channel component 60 Contacting surface.Equally, Fig. 6 D show the contact surface with third channel component 70 of second channel component 60, and Fig. 6 E show threeway The contact surface with second channel component 60 of road component 70.By making the second channel component 60 shown in Fig. 6 D and 6E and threeway The face of road component 70 is engaged with each other, and is formed using the common-use tunnel groove 62 and 71 formed on both in these channel components Long side direction on 8 common-use tunnels extending.So formed in passage formation component 210 and be directed to CMYK color respective one Group common feed path 211 and shared recovery approach 212 (referring to Fig. 7).The connected entrance 72 of third channel component 70 and joint rubber Hole connection in glue component 100, so as to be connected by fluidly connecting with fluid supply unit 220.In second channel component 60 Multiple connected entrances 61 are formed on the bottom surface of common-use tunnel groove 62, so that one end with the individual channel slot 52 of first passage component 50 Connection.First passage component 50 individual channel slot 52 the other end formation connected entrance 51 so that by fluidly connect via Connected entrance 51 is connected with multiple discharge modules 200.These individual channel slots 52 enable these passages to be incorporated into first passage The center side of channel component on the short side direction of component 50.In the following description, each color of record liquid is being represented In the case of common feed path 211, instead of reference 211, reference 211a~211d will be used, and to represent In the case of the shared recovery approach 212 for each color for recording liquid, instead of reference 212, reference 212a will be used ~212d.Equally, in the case where to represent to record the individual feed path 213 of each color of liquid, instead of reference 213, it will use reference 213a~213d, and in the individual recovery approach 214 of each color that to represent to record liquid In the case of, instead of reference 214, reference 214a~214d will be used.

First passage component~third channel the component 50,60 and 70 preferred pins of passage formation component 210 are constituted to record Liquid has corrosion resistance, and is made up of the low material of linear expansion coefficient.The example of suitable material includes aluminum oxide, liquid crystal and gathered Compound (LCP) and composite (resin material), wherein in these composites, to such as polyphenylene sulfide (PPS) or poly- The base-material of sulfone (PSF) etc. with the addition of the inorganic filler of silicon dioxide particles or fiber etc..Passage formation component 210 can be with To be formed by making three channel components 50,60 and 70 be laminated and be bonded to each other using adhesive, or should in selection In the case of composite resin material used by material, these three channel components can be engaged by melting.

Then, reference Fig. 7 is illustrated to the annexation of each passage in passage formation component 210.Fig. 7 is such as from first Channel component 50 be provided with discharge module 200 side watched, by making first passage component~third channel structure Part 50,60 and 70 engages the enlarged partial perspective view of the passage in formed passage formation component 210.Chain-dotted line in Fig. 7 Area encompassed is corresponding with the region for being configured with recording element substrate 10.Passage formation component 210 has for each color Common feed path 211a~the 211d and shared recovery approach 212a~212d extended along the long side direction of liquid discharging head 3. The multiple individual feed path 213a~213d for each color being made up of individual channel slot 52 are connected to shared via connected entrance 61 Feed path 211a~211d.The multiple individual recovery approach 214a~214d for each color being made up of individual channel slot 52 via Connected entrance 61 is connected to shared recovery approach 212a~212d.The channel design make it that record liquid energy is enough from common feed path 211 are pooled at the central recording element substrate 10 of passage formation component 210 via individual feed path 213.May be used also So that record liquid is recycled into shared recovery approach 212 via individual recovery approach 214 from recording element substrate 10.

Fig. 8 is showing along Fig. 7 line VIII-VIII passage formation component 210 and the cross section structure of discharge module 200. Fig. 8 shows that individual recovery approach 214a and 214c is connected via connected entrance 51 with discharge module 200.Although Fig. 8 only shows individual Recovery approach 214a and 214c, but as shown in fig. 7, individual feed path 213 and discharge module 200 connect at different sections It is logical.In discharge module 200 institute of recording element substrate 10 is formed in included supporting member 30 and recording element substrate 10 What is set supplies to recording element 15 (referring to Figure 10 B) passage for will record liquid from first passage component 50.In addition, in branch Formed in support component 30 and recording element substrate 10 for making supply to part or all of recovery of the liquid of recording element 15 (recycling) to first passage component 50 passage.The common feed path 211 of each color connects via its fluid supply unit 220 It is connected to the on high-tension side pressure adjustmenting mechanism of the vacuum cavitations unit 230 of respective color.Equally, share recovery approach 212 via Fluid supply unit 220 is connected to the pressure adjustmenting mechanism of the low-pressure side of the vacuum cavitations unit 230 of respective color.Utilize negative pressure These pressure adjustmenting mechanisms in control unit 230, produce pressure between common feed path 211 and shared recovery approach 212 Power is poor.Therefore, in the liquid discharging head 3 that each passage is connected as shown in FIG. 7 and 8, for each color, by common feed path 211 → individual feed path, 213 → recording element substrate 10 → individual recovery approach 214 → shares the order of recovery approach 212 Flow.

Discharge the explanation of module

Then, explanation is discharged into module 200.Fig. 9 A show the stereogram of a discharge module 200, and Fig. 9 B show it Exploded view.Method for manufacturing discharge module 200 is as described below.First, by recording element substrate 10 and flexible print circuit Plate 40 is pasted to the supporting member 30 for being pre-formed fluid connection mouthful 31.Then, recording element substrate is made by wire bonding Terminal 16 on 10 is electrically connected to the terminal 41 on flexible printed circuit board 40, covers lead using containment member 110 afterwards Junction surface (electric connection part) is to seal the wire bond.Flexible printed circuit board 40 relative to recording element substrate 10 Terminal 42 at the other end is electrically connected to the connection terminal 93 of electric wiring base plates 90 (referring to Fig. 5).Supporting member 30 is to use In the supporting member of support recording element substrate 10, and still formed by being fluidly coupled to recording element substrate 10 and passage The channel component connected between component 210, thus its flatness is high, and should be able to also highly reliably be bonded to recording element Substrate 10.The example of the suitable material of supporting member 30 includes aluminum oxide and resin material.

The explanation of the construction of recording element substrate

Then, the structure of recording element substrate 10 will be illustrated.Figure 10 A are that the formation of recording element substrate 10 has outlet 13 Side plan, Figure 10 B are the enlarged drawings of the part represented by Figure 10 A XB, and Figure 10 C are recording element substrates 10 The face relative to Figure 10 A the back side plan.As shown in Figure 10 A, recording element substrate 10 has multiple shapes of outlet 13 Rows of outlet formation component 12.Four colors with the color as record liquid are formed on outlet formation component 12 Four corresponding CMYK outlet rows.Note, below claim the direction that the outlet row for being arranged with multiple outlets 13 extends For " outlet line direction ".As shown in Figure 10 B, as the recording element 15 of the heater element to make liquid foaming using heat energy It is configured at the position corresponding with outlet 13.The balancing gate pit 23 comprising recording element 15 is separated using partition wall 22.Record member Part 15 is electrically connected the terminal 16 into Figure 10 A using the electric wiring (not shown) set by recording element substrate 10.Record Element 15 is based on the control circuit from recording equipment 1000 via electric wiring base plates 90 (Fig. 5) and flexible printed circuit board 40 The pulse signal that (Fig. 9 B) is inputted is generated heat so that liquid boiling, so that the liquid boiling in balancing gate pit 23.Due to The boiling and the foaming power that produces makes liquid be discharged from outlet 13.As shown in Figure 10 B, liquid supply passage 18 is along each discharge The side extension of mouth row, and opposite side extension of the liquids recovery passage 19 along each outlet row.The He of liquid supply passage 18 Liquids recovery passage 19 is the passage of the direction extension of set outlet row along on recording element substrate 10, and respectively Connected via supply mouth 17a and recovery port 17b with outlet 13.

As shown in Figure 10 C and 11, the formation that sheet lid 20 is laminated to relative to recording element substrate 10 has outlet 13 On the back side in face, wherein the lid 20 is more with what is connected with the liquid supply passage 18 and liquids recovery passage 19 that will be described later Individual opening 21.In example described herein, in lid 20, three openings 21 are set for each liquid supply passage 18, and In lid 20, two openings 21 are set for each liquids recovery passage 19.As shown in Figure 10 B, the opening 21 of lid 20 and Fig. 6 A institutes The multiple connected entrances 51 shown are connected.As shown in figure 11, lid 20 is used as constituting institute's shape in the base main body 11 of recording element substrate 10 Into liquid supply passage 18 and liquids recovery passage 19 wall a part cap.Lid 20 is preferably by for such as recording The material that the liquid of liquid etc. has sufficient corrosion resistance is made, and from preventing the viewpoint of colour mixture, the opening on opening 21 Shape and its position must have high accuracy.It is therefore preferable that using the material used by photosensitive resin material or silicon plate as lid 20, Its split shed 21 is formed by photoetching process.Thus, lid 20 is used for the spacing that passage is converted using opening 21, and Decline in view of pressure, lid 20 is preferably thin, and is preferably made up of photosensitive resin film.

Then, by the flowing of the liquid illustrated in recording element substrate 10.Figure 11 is the face XI-XI for being showing along Figure 10 A The recording element substrate 10 and the stereogram in the section of lid 20 intercepted.Recording element substrate 10 is by being laminated by silicon (Si) structure Into base main body 11 and by the outlet that photosensitive resin is constituted form what component 12 was formed, its middle cover 20 is bonded on substrate master On the back side of body 11.Recording element 15 (referring to Figure 10 B) is formed on another surface side of base main body 11, wherein in base main body The liquid supply passage 18 and liquids recovery passage by extending along outlet row are formed in the rear side of 11 another surface side 19 grooves constituted.It is respectively connecting to using base main body 11 and the liquid supply passage 18 and liquids recovery passage 19 of the formation of lid 20 Common feed path 211 and shared recovery approach 212 in passage formation component 210, and in liquid supply passage 18 and liquid There is differential pressure between body recovery approach 19.Individual feed path 213 and individual recovery approach are formed in first passage component 50 214.Individual feed path 213 connects liquid supply passage 18 and common feed path 211, and individual recovery approach 214 connects Connect liquids recovery passage 19 and shared recovery approach 212.Liquid is just being discharged in multiple outlets 13 of liquid discharging head 3 and is being carried out During record, at without the outlet for carrying out discharging operation, the differential pressure makes the liquid in liquid supply passage 18 by supply mouth 17a → balancing gate pit 23 → recovery port 17b sequential flowing, and flow to liquids recovery passage 19.Profit is indicated by the arrow C in fig. 11 The flowing.The flowing is made it possible to the record liquid after being thickened due to the vaporization of the solvent from outlet 13, bubble and different The never positive outlet 13 recorded such as thing and balancing gate pit 23 are recycled to liquids recovery passage 19.This also allows for suppressing The thickening of record liquid at outlet 13 and balancing gate pit 23.Being recycled to the liquid of the record liquid of liquids recovery passage 19 etc. is Via the opening 21 and 31 (referring to Fig. 9 B) of fluid connection mouthful of supporting member 30 of lid 20, by the company in passage formation component 210 What the order of port 51, individual recovery approach 214 and shared recovery approach 212 was reclaimed.The liquid reclaimed is finally returned Receive to the feed path of recording equipment 1000.

That is, being supplied by the master unit for supplying and reclaiming by sequential flowing as described below from recording equipment 1000 Liquid to the record liquid to liquid discharging head 3 etc..First, fluid connection 111 of the liquid from fluid supply unit 220 In influent discharge first 3.Then, the liquid is supplied to set by joint rubber component 100, third channel component 70 successively Connected entrance 72 and common-use tunnel groove 71, second channel component 60 set by common-use tunnel groove 62 and connected entrance 61, Yi Ji Individual channel slot 52 and connected entrance 51 set by one channel component 50.Afterwards, the liquid by liquid as set by supporting member 30 The liquid supply passage 18 and supply mouth 17a set by opening 21 and base main body 11 set by body connected entrance 31, lid 20 Sequentially feeding to balancing gate pit 23.Supplied to balancing gate pit 23 but not from outlet 13 discharge liquid by the institute of base main body 11 Opening 21 set by the recovery port 17b and liquids recovery passage 19 of setting, lid 20 and the liquid set by supporting member 30 The sequential flowing of connected entrance 31.Afterwards, connected entrance 51 of the liquid as set by first passage component 50 and individual channel slot 52, the The common-use tunnel groove 71 set by connected entrance 61 and common-use tunnel groove 62, third channel component 70 set by two channel components 60 With connected entrance 72 and the sequential flowing of joint rubber component 100.Liquid is further from set by fluid supply unit 220 Fluid connection 111 flow to the outside of liquid discharging head 3.In the case where employing the configuration of the first circulation shown in Fig. 2, Then liquid from the inflow of fluid connection 111 be supplied to joint rubber component 100 by vacuum cavitations unit 230.It is another Aspect, in the case where employing the configuration of the second circulation shown in Fig. 3, the liquid reclaimed from balancing gate pit 23 passes through joint rubber Component 100, is then flowed out to outside liquid discharging head 3 via vacuum cavitations unit 230 from fluid connection 111.

In addition, all liq not flowed into from one end of the common feed path 211 of liquid deliverying unit 300 all via Individual feed path 213a is supplied to balancing gate pit 23.As shown in Figures 2 and 3, also exist logical even without individual supply is entered The liquid of fluid supply unit 220 is flowed through in the case of road 213a, from the other end of common feed path 211.Thus, liquid is set The passage that body flows in the case of without via recording element substrate 10, this causes there is stream even in recording element substrate 10 In the case of the big fine channel of impedance,motional, it can also suppress the adverse current circulated of liquid.Therefore, the energy of liquid discharging head 3 Enough suppress the thickening in balancing gate pit with the liquid of part near outlet, thus suppress discharge deviation and do not discharge, thus result High image quality record can be carried out.

The explanation of position relationship between recording element substrate

As described above, liquid discharging head 3 has multiple discharge modules 200.Figure 12 is that adjacent two are discharged in modules 200 Recording element substrate 10 adjacent part part amplification.As shown in Figure 10 A~10C, here, recording element substrate 10 is usual It is shaped as parallelogram.As shown in figure 12, the outlet row 14a for being arranged with outlet 13 on recording element substrate 10~ 14d is configured to tilt certain angle relative to the conveying direction L of recording medium.Thus, the phase of recording element substrate 10 is made At least one outlet in outlet row at adjacent part overlaps each other on the conveying direction L of recording medium.In fig. 12, Two outlets 13 on line D are in overlapped relation.The layout make it that the position even in recording element substrate 10 is relative In the case of deviateing to a certain extent in precalculated position, it can also be made by the drive control of overlapped outlet 13 The blackstreak and blank parts recorded in image is less obvious.Even in multiple recording element substrates 10 linearly (in-line arrangement) Rather than it is in staggered configuration be laid out in the case of, the structure shown in Figure 12 can also be used.Thus, suppressing liquid discharge While first 3 length on the conveying direction of recording medium increases, the overlapping portion between recording element substrate 10 can be tackled The blackstreak and blank parts of office.Although the interarea of recording element substrate 10 is generally in the shape of parallelogram here, But this is simultaneously nonrestrictive.Even in the use of shape is, for example, rectangle, the feelings of trapezoidal or other shapes of recording element substrate 10 , can also be suitably using the structure of the present invention under condition.

According to the explanation of the liquid discharge apparatus of the second topology example

The liquid discharge apparatus in above-mentioned first structure example can be not limited to using the liquid discharge apparatus of the present invention.With It is lower that explanation is (following to be also known as according to the ink jet recording device 1000 of the second topology example of the liquid discharge apparatus of the present invention " recording equipment ") structure.Figure 13 is shown as according to the recording equipment 1000 of the liquid discharge apparatus of the second topology example Schematic construction.Note, the parts different from first structure example mainly will be only illustrated below, and be directed to omitting and the first knot The explanation of structure example identical part.

Recording equipment 1000 and the difference of first structure example shown in Figure 13 are following point：By make each with One of CMYK color corresponding four monochromatic arranged in parallel of liquid discharging head 3 carry out panchromatic beat in recording medium 2 Print.Although for the quantity of outlet row workable for each color being pin in 1 row, the second topology example in first structure example Quantity to outlet row workable for each color is multiple (being later 20 rows in described Figure 20 A).So make it possible to By the way that record data is distributed to multiple outlet rows and is recorded and carries out the record of very high speed.Even if in the presence of showing The outlet do not discharged, using corresponding on the conveying direction L of the recording medium in the other rows discharged in complementary fashion Outlet at position also improves reliability.Therefore, Industrial Printing is adapted to according to the recording equipment 1000 of the second topology example Deng.With with first structure example identical mode, feed system, buffer reservoir 1003 and the main reservoir of recording equipment 1000 1006 are connected to liquid discharging head 3 by fluidly connecting.Each liquid discharging head 3, which to be also electrically connected electric power and discharge, be extremely used for Control signal is transmitted to the electric control unit of liquid discharging head 3.With with first structure example identical mode, in the second structure The first circulation configuration that Fig. 2 and 3 is shown respectively and any one in second circulation configuration can be used in example.

The explanation of the construction of liquid discharging head

Reference Figure 14 A and 14B is illustrated into the construction of the liquid discharging head 3 according to the second topology example.Figure 14 A be such as from It is formed with the stereogram for the liquid discharging head 3 that the side in the face of outlet is watched.Figure 14 B are the sides opposite with Figure 14 A Stereogram.Liquid discharging head 3 has 16 recording element substrates 10 being arranged in a linear on its long side direction, and be can The ink-jet row type liquid discharging head recorded with the record liquid using a color.With with first structure example identical side Formula, liquid discharging head 3 has fluid connection 111, signal input terminal 91 and power supply terminal 92.However, due to discharge The quantity of mouth row becomes greatly compared with the quantity of the outlet row in first structure example, therefore signal input terminal 91 and electric power are supplied The both sides of liquid discharging head 3 can be configured to terminal 92.This is to reduce in the wiring set by recording element substrate 10 The voltage occurred at portion declines and signal transmission delay.

Figure 15 is the exploded perspective view of the liquid discharging head 3 according to the second topology example, and it shows to be divided according to function Each part or unit of composition liquid discharging head 3 after solution.Liquid in the role and liquid discharging head 3 of these units and component The order and first structure example of body flowing are essentially identical, but in the second topology example, it is ensured that the rigidity institute of liquid discharging head The function of utilizing is different.In first structure example, mainly liquid is ensured using liquid deliverying unit supporting member 81 Discharge the rigidity of head, but in the second topology example, using second channel component 60 included in liquid deliverying unit 300 come Ensure the rigidity of liquid discharging head.In this second topology example, there is the liquid at the two ends for being connected to second channel component 60 Deliverying unit supporting member 81.The liquid deliverying unit 300 is mechanically engaged to the balladeur train of recording equipment 1000, is thereby determined that The position of liquid discharging head 3.Electric wiring base plates 90 and fluid supply unit 220 with vacuum cavitations unit 230 are bonded to Liquid deliverying unit supporting member 81.Filter (not shown) is built in the two fluid supply units 220.Second structure is shown Example is not configured as carrying out two kinds of Stress controls for each vacuum cavitations unit 230.One in two vacuum cavitations units 230 Individual vacuum cavitations unit 230 is configured to carry out control pressure with of a relatively high negative pressure, so that as on high-tension side vacuum cavitations Unit, and another vacuum cavitations unit 230 is configured to carry out control pressure with relatively low negative pressure, so that as low-pressure side Vacuum cavitations unit.Configured in the vacuum cavitations unit 230 of as shown in figure 15, high-pressure side and low-pressure side in liquid discharging head 3 Long side direction on two ends in the case of, along liquid discharging head 3 long side direction extend common feed path 211 and share The mobile phase of liquid on recovery approach 212 is mutually opposite.So promote common feed path 211 and shared recovery approach 212 Between heat exchange, it is possible thereby to reduce the temperature difference between the two common-use tunnels.This is favourable in the following areas：On edge Temperature is less likely to occur between the multiple recording element substrates 10 for common feed path 211 and the configuration of shared recovery approach 212 Difference, thus be less likely to occur to produce due to temperature difference record uneven.

Then, it will be explained in the passage formation component 210 of liquid deliverying unit 300.Passage formation component 210 is such as figure The first passage components 50 and second channel component 60 that are laminated shown in 15, and will be supplied from fluid supply unit 220 The liquid of record liquid etc. is distributed to discharge module 200.Passage formation component 210 is also served as making from discharge module 200 The liquid of recycling is back to the recovery approach component of fluid supply unit 220.The second channel component of passage formation component 210 60 be the component for foring common feed path 211 and shared recovery approach 212, and goes back principal security liquid discharging head 3 Rigidity.It is therefore preferable that the material of second channel component 60 has sufficient corrosion resistance for the liquid of record liquid etc., and And with high mechanical strength.The specific example of suitably used material includes stainless steel, titanium (Ti) or aluminum oxide etc..

Then, reference Figure 16 A~16E is illustrated into the details of first passage component 50 and second channel component 60.Figure 16 A Show first passage component 50 be provided with discharge module 200 side face, and Figure 16 B be show Figure 16 A face (with What second channel component 60 was in contact) figure at the back side.Different from the situation of first structure example, according to the of the second topology example One channel component 50 is the configuration that the multiple components corresponding with discharge module 200 are adjacent to arrangement.Made using the segmenting structure The length corresponding with the length needed for liquid discharging head 3 can be realized by arranging multiple this modules by obtaining.For example, the knot Structure is particularly suited for use in and JIS (Japanese Industrial Standards, Japanese Industrial Standards) B2 sizes and even In the corresponding relatively long liquid discharging head of larger sized thin slice.As shown in Figure 16 A, the connection of first passage component 50 Mouth 51 is connected by fluidly connecting with discharge module 200, and as shown in fig 16b, the individual connected entrance of first passage component 50 53 are connected by fluidly connecting with the connected entrance 61 of second channel component 60.Figure 16 C show second channel component 60 with first The face that channel component 50 is in contact, Figure 16 D show the section that the through-thickness of the central portion of second channel component 60 is intercepted, And Figure 16 E are the figures in the face being in contact with fluid supply unit 220 for showing second channel component 60.Second channel component 60 Passage and connected entrance function and a color in first structure example record liquid situation it is identical.Second channel component One of 60 common-use tunnel groove 71 is the common feed path 211 shown in Figure 17, and another is to share recovery approach 212, wherein it is supplied to liquid from the lateral another side in one end on the long side direction of both each comfortable liquid discharging head 3.It is different In the situation of first structure example, in the topology example, for common feed path 211 and the liquid of shared recovery approach 212 The direction of the flowing of body is mutually opposite direction on the long side direction of liquid discharging head 3.

Figure 17 shows the relevant annexation of each passage between recording element substrate 10 and passage formation component 210. As shown in figure 17, one group of common feed along the long side direction extension of liquid discharging head 3 is provided with passage formation component 210 Passage 211 and shared recovery approach 212.The respective position of connected entrance 61 of second channel component 60 and first passage component 50 The position alignment of the individual connected entrance 53 and connected entrance 61 of second channel component 60 is each attached to first passage component 50 Individual connected entrance 53, is consequently formed from the connected entrance 72 of second channel component 60 and leads to via common feed path 211 towards first The liquid supply path of the connected entrance 51 of road component 50.Equally, the connected entrance 72 from second channel component 60 is also formed via altogether With recovery approach 212 towards the connected entrance 51 of first passage component 50 liquid supply path.

Figure 18 is the figure for being showing along the section that Figure 17 XVIII-XVIII is intercepted.Figure 18 shows common feed path How 211 be connected to discharge module 200 via connected entrance 61, individual connected entrance 53 and connected entrance 51.Although not showing in figure 18 Go out, but from Figure 17 it can be clearly seen that another section will show to be connected to sharing back for discharge module 200 via same paths Receive passage 212.With with first structure example identical mode, formed and be used in discharge module 200 and recording element substrate 10 With being formed with the passage that the balancing gate pit 23 of outlet 13 is connected.Using these passages, the liquid supplied part or all Recycled via the corresponding balancing gate pit 23 of the outlet 13 with just not carrying out discharging operation.With with first structure example Identical mode, via fluid supply unit 220, common feed path 211 is connected on high-tension side vacuum cavitations unit 230, And share the vacuum cavitations unit 230 that recovery approach 212 is connected to low-pressure side.Therefore, produced using vacuum cavitations unit 230 Raw differential pressure, generates from common feed path 211 via the balancing gate pit 23 of recording element substrate 10 and flows to shared recovery approach 212 flowing.

Discharge the explanation of module

Then, the discharge module 200 according to the second topology example will be illustrated.Figure 19 A are the stereograms for discharging module 200, And Figure 19 B are its exploded views.Difference with first structure example is following point：Multiple terminals 16 are configured at along note Record the both sides (long leg of recording element substrate 10) in the direction of multiple outlet rows of device substrate 10.On the other hand：Xiang Yi Individual recording element substrate 10 sets two flexible printed circuit boards 40, and the two flexible printed circuit boards 40 be electrically connected to Terminal 16.Its reason is：The quantity of set outlet row is, for example, 20 rows on recording element substrate 10, and this is relative to the 4 rows in one topology example have been dramatically increased.That is, it is therefore an objective to make from terminal 16 until corresponding with outlet row Ultimate range untill the recording element 15 that ground is set is kept as short, thus reduces in recording element substrate 10 set cloth The voltage occurred at line portion declines and signal transmission delay.The fluid connection mouthful of supporting member 30 is set to recording element substrate 10 31, and the opening in the way of across all outlet rows of these fluid connections mouthful 31.Other points are identical with first structure example.

The explanation of the construction of recording element substrate

Then, by structure of the explanation according to the recording element substrate 10 of the second topology example.Figure 20 A are to show recording element The plan in the face of the side for being configured with outlet 13 of substrate 10, Figure 20 B are to show to be formed with liquid supply passage 18 and liquid The figure of the part of body recovery approach 19, and Figure 20 C are the plans at the back side for showing the face shown in Figure 20 A.Figure 20 B are to show In the state of removing the lid 20 set by the rear side of recording element substrate 10 in Figure 20 C, the face of recording element substrate 10 Schematic diagram.As shown in fig. 20b, at the back side of recording element substrate 10, it is arranged alternately liquid supply along outlet line direction logical Road 18 and liquids recovery passage 19.Although the quantity of outlet row is much bigger compared with first structure example, and first structure The essential difference of example is：As described above, terminal 16 is configured at the both sides of recording element substrate 10 along outlet line direction Portion.Such as such as the following basic structure is identical with the basic structure in first structure example：One group is set for each outlet row Liquid supply passage 18 and liquids recovery passage 19 and set what is connected with the fluid connection of supporting member 30 mouth 31 to lid 20 Opening 21 etc..

The following structure based on the present invention will be illustrated：Even in all liquid discharge apparatus waited as previously discussed or liquid row Driving condition of lifting one's head change in the case of, can also suppress heating liquid from liquids recovery channel side countercurrently, so as to auxiliary Help influence of the change for suppressing driving condition to discharge characteristic.Figure 21 shows the knot of liquid discharging head according to embodiments of the present invention Structure.In the liquid discharging head 3 shown in Figure 21, passage formation component 210 is configured to the structure shown in Fig. 1~20C It is integrated into the component with the length being equal with the whole length (length in Figure 21 X-direction) of liquid discharging head 3.Via Supporting member 30 (Figure 21 is not shown) described below passage formation component 210 on, by the Y direction interlock in the way of Multiple recording element substrates 10 are arranged in X-direction, on these recording element substrates 10, generation is configured to high-density and is used With the multiple recording elements for the energy for discharging liquid.Therefore, an elongated liquid discharging head is constituted.Recording element substrate 10th, passage formation component 210 and supporting member 30 constitute liquid deliverying unit.Although recording element substrate 10 is described as handing over Mistake, but present invention can also apply to the liquid discharging head that the recording element substrate 10 as shown in Fig. 1~20C is arranged in a straight line.

Liquid discharging head shown in Figure 21 has overlapping region L between two adjacent recording element substrates 10.Even if There are some mistakes in the configuration of each recording element substrate 10, region L is also maintained at the record moved along the Y direction and is situated between The gap caused by error will not be generated when being recorded in matter in record.Although Figure 21 is not shown, with Fig. 1~ 20C identical modes, the liquid discharging head has liquid deliverying unit and vacuum cavitations unit.For to each recording element base The electric wiring base plates 90 of the supply of plate 10 discharge drive signal and electric power are such as compound such as glass-epoxy Material is made, and with the connector 95 for being integrated with signal input terminal and power supply terminal.By housing 80 come one Ground supports liquid deliverying unit, electric wiring base plates 90 and for each recording element substrate 10 to be electrically connected to electric wiring The flexible printed circuit substrate 40 of substrate 90.Electric connection part between recording element substrate 10 and flexible printed circuit substrate 40 Divide and covered and protected by the containment member 110 that there is good sealing property and ion to block performance of epoxy resin etc. Shield.

Figure 22 is the exploded perspective view for being shown specifically liquid deliverying unit, and it shows to include supporting member 30 and recording element The discharge module of substrate 10.Supporting member 30 is provided on the passage formation component 210 as base plate and for each record Device substrate 10 and be inserted in each recording element substrate 10 and passage formation component 210 between component.Figure 22 shows to constitute note Record the base main body 11 for being divided into 2 in a thickness direction of device substrate 10.One partitioning portion is in Figure 22 (a) to connect The state for being bonded to outlet formation component 12 is illustrated, and another partitioning portion is logical with liquid supply in Figure 22 (b) The state that road 18 and liquids recovery passage 19 expose is illustrated.In fig. 22, (c) shows lid 20, and (d) shows supporting member 30.Four outlet rows 424 of the record liquid for discharging same color are formd on recording element substrate 10.In each discharge In mouth row 424, multiple outlets 13 are arranged in rows.In this configuration, supporting member 30, which has, is used to that liquid etc. will to be recorded Liquid is distributed to the function of recording element substrate 10 from passage formation component.Record member is arranged on the above identical lid 20 On the opposite face in the face with being formed with outlet 13 of part substrate 10.Lid 20 and the liquid supply passage in recording element substrate 10 18 connect with liquids recovery passage 19, and with for from supporting member 30 to the fluid passage of recording element substrate 10 Multiple fine openings that spacing is changed.In these openings, the opening connected with liquid supply passage 18 is referred to as supply Side opening 21a, and the opening connected with liquids recovery passage 19 is referred to as recovery side opening 21b.

Supporting member 30, which has along the side vertical with the direction that outlet row 424 extends, upwardly extends the slit-shaped to be formed Supply chamber 431 and recovery room 432.Figure 22 does not reflect the volume differences between supply chamber 431 and recovery room 432.Supply chamber 431 and recovery room 432 it is corresponding with the fluid connection mouthfuls 31 in the structure shown in Fig. 9 A, 9B, 19A and 19B.Supply chamber 431 is For liquid to be distributed from the common feed path 211 in passage formation component 210 and leading to recording element substrate 10 is supplied Road, and connected with common feed path 211.Equally, recovery room 432 is to be used to liquid being recycled to from recording element substrate 10 The passage of shared recovery approach 212 in passage formation component 210, and connected with shared recovery approach 212.Set by lid 20 Supply side opening 21a be provided at the position that supply chamber 431 and liquid supply passage 18 intersect and be easy to the supply chamber 431 Connection between liquid supply passage 18.Equally, recovery side opening 21b is provided in recovery room 432 and liquids recovery is logical It is easy to the connection between the recovery room 432 and liquids recovery passage 19 at the position that road 19 intersects.Liquid supply passage 18 and liquid Body recovery approach 19 is formed groove parallel to each other, and with being formed extended at both sides on the identical direction of outlet row 424 On the opposite face in the face with being formed with outlet 13 of base main body 11.Here, three liquid supply passages 18 and two liquid Recovery approach 19 is formed by alternately configuration.A pair adjacent liquid supply passages 18 and liquids recovery passage 19 and a discharge Mouth row 424 is corresponding.Supply side opening 21a and recovery side opening 21b set by lid 20 are each arranged in rows.A line is supplied Side opening 21a is referred to as supplying row 437, and a line recovery side opening 21b is referred to as reclaiming row 438.Supply row 437 and reclaim and go (that is, prolong on the direction of the opening extension of the slit-shaped of 438 each comfortable supply chambers 431 and recovery room 432 with outlet row 424 On the vertical direction in the direction stretched) extension.

Although being described as setting by supply chamber 431 and recovery room 432 above and arriving supporting member 30, supply chamber is set 431 and the position not limited to this of recovery room 432.It will consider there is provided the feelings of common feed path 211 and shared recovery approach 212 Condition, wherein supplying liquid from the storage element of the grade of buffer reservoir 1003 and the liquid supplied being back into buffering Reservoir 1003.Now, both liquid supply passages 18 formed with common feed path 211 and recording element substrate 10 The part of connection is supplied with room 431, and the liquids recovery formed with shared recovery approach 212 and recording element substrate 10 Both parts of connection of passage 19 are recovery rooms 432.Therefore, supply chamber 431 and recovery room 432 can extend from supporting member 30 Into passage formation component 210.In addition, being directly mounted to note in the case of without supporting member in passage formation component 210 In the construction for recording device substrate 10, supply chamber 431 and recovery room 432 are formed to passage formation component 210 from supporting member 30 In.In any case, multiple supply chambers 431 and recovery room 432 are formd, and these supply chambers 431 and recovery room 432 exist Common feed path 211 and shared recovery approach 212 and recording element are alternately arranged in the orientation of outlet row 424 In region between substrate 10.

Figure 23 A~23C is the exploded perspective view for describing recording element substrate 10 in detail.Figure 23 A show the row of being formed with The part of outlet 13, Figure 23 B are shown to be formed with the part of balancing gate pit 23, supply mouth 17a and recovery port 17b, and Figure 23 C are shown It is formed with the base main body 11 of liquid supply passage 18 and liquids recovery passage 19.For convenience of description, one is only shown here Outlet row.Figure 24 A and 24B are used to illustrate balancing gate pit 23 and outlet 13.Figure 24 A are the records for showing to watch from outlet 13 The plan of state inside device substrate 10, and Figure 24 B are the sectional views along Figure 24 A line XXIVB-XXIVB interceptions. Reference Figure 22~24B is illustrated into the liquid discharging head 3 according to the present embodiment.As the recording element 15 of heater element with such as figure Mode shown in 23A~24B in face of outlet 13 is arranged on the surface of base main body 11, wherein outlet 13 and recording element Region between 15 is balancing gate pit 23.Although multiple recording elements 15 are provided with base main body 11, in adjacent record Partition wall 22 is configured between element 15 to be separated between balancing gate pit 23.Therefore, a recording element 15 and a discharge Mouth 13 corresponds to a balancing gate pit 23.It means that as shown in fig. 24b, supply mouth 17a and recovery port 17b are individually and pressure What the two ends of room 23 were accordingly formed.Supply mouth 17a and recovery port 17b as groove respectively with forming in base main body 11 Liquid supply passage 18 on opposing face is connected with liquids recovery passage 19.

According to the liquid discharging head of this topology example the passage of the outlet 13 for arranged in high density is kept In the area roughly the same with recording element substrate 10.It can so make it that liquid discharging head is kept as not too large, and Be also convenient for for store the liquid to be discharged reservoir (not shown) and liquid discharging head between liquid supply and Reclaim, thus the whole system of holding liquid discharge apparatus is compact.

The flowing of liquid according to the record liquid in the liquid discharging head of this topology example etc. will be illustrated.Utilize supply Side and the pressure differential reclaimed between side set the circulation of the liquid for balancing gate pit 23, to cause liquid with a few mm/s~tens Mm/s flow velocity flows through balancing gate pit 23.Figure 25 A and 25B are shown respectively from the side of common feed path 211 and shared recovery approach Common feed path 211 that 212 sides are watched, the stream for sharing recovery approach 212, supply chamber 431 and the liquid in recovery room 432 Dynamic figure.Common feed path 211 and shared recovery approach 212 are formed in passage formation component 210 (Fig. 5 and 7), and are supplied Formed to room 431 and recovery room 432 in supporting member 30 (referring to Figure 22).Flow through common feed path 211 and share recovery The total flow of the liquid of passage 212 is about 1.5 times of delivery flow, to provide common feed path 211 and shared recovery approach Being enough between 212 generates the pressure differential of the circulation of liquid, and prevents the adverse current of liquid.Do not have in liquid as shown in fig. 25 a Under the holding state discharged from outlet, liquid passes through supply chamber 431 from common feed path 211, through the supply side of lid 20 Be open 21a and supply to recording element substrate 10 liquid supply passage 18.Afterwards, via supply mouth 17a feed pressures room 23.Then, the liquid of feed pressure room 23 flow to liquids recovery passage 19 via recovery port 17b, further passs through returning for lid 20 Receive side opening 21b and flow to the recovery room 432 of supporting member 30, and reach the shared recovery approach of passage formation component 210 212.The stream forms the stream circulated via balancing gate pit 23.

Now, liquid discharging head enters to be about to the temperature control that recording element substrate 10 is warming up to predetermined temperature, with suppress by In head caused by driving temperature change and maintain good recording quality.Rise and be controlled in the temperature of liquid discharging head In the state of system, ink is heated up by flowing through the passage in recording element substrate 10, and the liquid after heating flow to recovery room In 432.Operated once liquid discharging head enters record from holding state, then the stream of liquid is from supply mouth 17a and recovery port 17b if in the standby state, the liquid for flowing to recovery room 432 is also flowed towards outlet 13 towards outlet 13 And discharged from outlet 13.As shown in Figure 25 B, liquid is supplied to recovery room 432 from shared recovery approach 212, to compensate The liquid of the side of outlet 13 is flow to from recovery room 432.The liquid having warmed up flow to recovery room 432 in the standby state, and In the case that liquid discharging head start recording is operated, the ink after the heating is supplied to balancing gate pit 23, therefore utilizes the stream of liquid The effect for moving to cool down recording element substrate 10 is reduced.As a result, the temperature of liquid discharging head 3 rises.Heating in recovery room 432 Ink is gradually discharged, and supplies the ink that do not heat up from shared recovery approach 212.Therefore, the temperature of the liquid in recovery room 432 Reduce, and the temperature of liquid discharging head is also reduced, and is finally reached normal temperature.

In order to suppress the phenomenon, in the present invention, supply chamber 431 and the recovery room formed in supporting member 30 are formd 432, make it that the inner volume of recovery room 432 is less than the inner volume of supply chamber 431.It will be detailed below the liquid according to the present invention Some examples and comparative example of body discharge head.

First example and the first comparative example

Figure 26 A and 26B are the supporting members 30 on the direction (Figure 22 line B-B) of the outlet row 424 of liquid discharging head Sectional view.Figure 26 A show the supply chamber 431 in the first example and the shape of recovery room 432, and Figure 26 B show the first ratio Compared with the supply chamber 431 and the shape of recovery room 432 in example.Downside in Figure 26 A and 26B is towards recording element substrate 10 Side.

In the first example, on the direction of outlet row, the width of recovery room 432 is made to be less than the width of supply chamber 431, And the inner volume of recovery room 432 is less than the inner volume of supply chamber 431.Here, the inner volume of supply chamber 431 is more than recovery room 432 inner volume.The inner volume of supply chamber 431 and recovery room 432 refers respectively to lead to from common feed path 211 and shared reclaim Inner volume of the road 212 untill the lid 20 of recording element substrate 10.

In the first comparative example, the width phase of the width of supply chamber 431 and recovery room 432 on the direction of outlet row Together, and supply chamber 431 inner volume it is identical with the inner volume of recovery room 432.In Figure 26 B supply chamber 431 is represented apart from L1 Interval between recovery room 432.

By for the respective simulation of liquid discharging head according to the first example and the first comparative example, obtaining and existing from liquid The state (holding state) circulated in the case of not discharged from outlet via balancing gate pit 23 is changed into be carried out with preset frequency The temperature change of balancing gate pit 23 during the recording status of discharge.Figure 27 is to conceptually illustrate the temperature when time point S starts discharge The figure of change is spent, wherein solid line represents the first example and dotted line represents the first comparative example.As can be seen from Figure 27, for first Example, compared with supply chamber 431 and recovery room 432 have the first comparative example of identical inner volume, until temperature from start recording Degree reach peak value untill time it is shorter, peak temperature is relatively low in addition, and the time untill reverting to normal temperature compared with It is short.Reason is as follows：The first example that the inner volume of recovery room 432 is relatively small has the less liter being present in recovery room 432 Geothermal liquid, and the liquid consumed in a short time by discharge.

Figure 28 is the supporting member 30 along Figure 22 line B-B liquid discharging heads according to the second comparative example intercepted Sectional view.With with the first comparative example identical mode, the width of supply chamber 431 and recovery room 432 on the direction of outlet row Width it is identical, but supply chamber 431 and the width of recovery room 432 are than the narrow width shown in the first comparative example, in addition, skewness Weighing apparatus.Specifically, supply chamber 431 is in mutually the same spacing, and recovery room 432 is in mutually the same spacing, but from confession Differed to room 431 to the distance positioned at the adjacent recovery room 432 in both sides.In the adjacent recovery room 432 in both sides, to closer to The distance of the recovery room 432 of supply chamber 431 represented using L1, and to recovery room 432 farther out distance using L2 come table Show.Specifically, by the supply side opening 21a being defined as apart from L1 and L2 measured by outlet row and recovery side opening 21b.

In the second comparative example, other sizes of liquid discharging head are identical, but compared with the first comparative example, supply chamber 431 Both inner volumes are smaller with recovery room 432.In the second comparative example, the inner volume of recovery room 432 is smaller, therefore compares with first Compared compared with example, the rising of temperature when can suppress start recording.However, configuration is unbalanced, therefore there is supply chamber 431 and return Receive the long configuration in the distance between room 432, thus liquid travels from liquid feed path 18 and liquids recovery passage 19 apart from L2 It is long.Longer causes that the pressure at liquid supply passage 18 and liquids recovery passage 19 declines increase apart from L2.

Figure 29 A and 29B show to be directed to liquid supply passage 18 and liquids recovery passage 19 along outlet row by simulation The summary for the result that the pressure distribution in direction is obtained.Solid line represents the pressure distribution of liquid supply passage 18, and dotted line table Show the pressure distribution of liquids recovery passage 19.Figure 29 A show the result of the liquid discharging head according to the first comparative example, and scheme 29B shows the result of the liquid discharging head according to the second comparative example.It is can be seen that from Figure 29 A and 29B in supply side opening 21a In the case of the distance between side opening 21b length is reclaimed, under the pressure at liquid supply passage 18 and liquids recovery passage 19 Drop is larger, and the small portion of pressure differential occurs in the pressure differential Δ P between liquid supply passage 18 and liquids recovery passage 19 Divide Δ Pn.The expectation that balancing gate pit 23 can not be obtained across at these small parts of pressure differential is circulated, and this may draw Play the failure discharge caused by the increase of the viscosity of liquid etc. when being changed into recording status from holding state.From the first ratio Compared with example as can be seen that even in supply chamber 431 and recovery room 432 with same widths by identical spacing arrangement in the case of, Apart from L1 is also long and pressure declines and increased according to this apart from L1, therefore identical in the case of there occurs with the second comparative example Puzzlement.Accordingly, it would be desirable to the L1 and L2 that adjusts the distance is configured, to cause even in there is liquid supply passage 18 and liquids recovery is logical In the case that pressure at road 19 declines, predetermined circular flow can also be ensured in balancing gate pit 23, and by the He of supply chamber 431 The width of recovery room 432 is arranged to meet these conditions.

It is can be seen that from the result of the first example and the first comparative example and the second comparative example in reduction recovery room 432 The volume and inner volume of supply chamber 431 of increasing suppresses to be changed into note from holding state while desired circulate is maintained It is effective in terms of the temperature rising of balancing gate pit 23 during record state.

Second example

In order that the inner volume for obtaining recovery room 432 is less than the inner volume of supply chamber 431, it can be configured as follows：Reclaim The height of room 432 is less than the height of supply chamber 431.The liquid discharging head that Figure 30 A and 30B are shown below：For the He of supply chamber 431 For recovery room 432, the width on outlet line direction is identical, but for recovery room 432, makes height step-down.Figure 30 A and 30B shows the supporting member 30 according to the liquid discharging head of the second example, and wherein Figure 30 A are intercepted along Figure 22 line B-B Sectional view, and Figure 30 B are the sectional views intercepted along Figure 22 line A-A.

With with the first example identical mode,, can be with when being changed into recording status from holding state in the second example Suppress crossing at balancing gate pit 23 to heat up.Second example has on outlet line direction for supply chamber 431 and recovery room 432 There is identical and sufficient width, therefore pressure decline is relatively low at liquid supply passage 18 and liquids recovery passage 19, and can To ensure desired circulate in balancing gate pit 23.

3rd example

Make recovery room 432 inner volume be less than supply chamber 431 the technology that is utilized of inner volume be not limited to the first example and Technology shown in second example.In the 3rd example, by make recovery room 432 width be less than supply chamber 431 width and The height of recovery room 432 is set to be less than the height of supply chamber 431 so that the inner volume of recovery room 432 is less than the interior body of supply chamber 431 Product.Figure 31 shows the supporting member 30 of the liquid discharging head according to the 3rd example, and is intercepted along Figure 22 line B-B Sectional view.Because the inner volume of recovery room 432 is less than the inner volume of supply chamber 431, therefore the 3rd example is suppressing from standby shape State is changed into more efficient in terms of temperature rising after recording status.

4th example

Figure 32 shows the supporting member 30 of the liquid discharging head according to the 4th example, and is the line B-B institutes along Figure 22 The sectional view of interception.In the liquid discharging head 3 according to the 4th example shown in Figure 32, only make the part in recovery room 432 The inner volume of recovery room is less than the inner volume of supply chamber 431.According to the cycling condition of liquid and the component of composition liquid discharging head Thermal characteristics, there is following situation：In the end of recording element substrate 10, compared with the other parts of recording element substrate 10, Temperature when recording status starts rises larger.4th example is by make it that the inner volume of recovery room 432 is only opened in recording status Easily occur smaller at the part that temperature rises to tackle these situations during the beginning.Therefore, even if only for multiple recovery rooms 432 A part of recovery room reduces inner volume, can also realize the effect of the present invention.In other words, by causing multiple recovery rooms 432 In at least one recovery room 432 inner volume be less than the supply chamber 431 adjacent with the recovery room 432 inner volume, to realize The effect of the present invention.

In the examples described above so that narrowed width of the recovery room 432 on outlet line direction, and/or cause back Receive the height step-down of room 432.However, in the presence of following situation：According to the type of the liquid to be discharged and physical characteristic value (for example, Viscosity and component wetting characteristics), narrowed width or reduction height is made it difficult to that liquid is filled into support structure in advance In part 30 and recording element substrate 10.Liquid is filled into supporting member 30 and recording element substrate 10, this be typically via Common feed path 211 and shared recovery approach 212 are carried out.If filling is broken down, the end in balancing gate pit 23 Etc., retained atmosphere bubble.In the structure for example shown in the second example, there is following risk：As shown in figure 33, in recovery room 432 end (highly low part), may remain bubble 450.This residual bubble is upper with the temperature of liquid discharging head Rise and increase, hinder supply of the liquid to balancing gate pit 23, as a result cause to discharge failure.The recovery room 432 reduced in inner volume In, easily there is this problem.

Therefore, will be described below more preferably method liquid being filled into the easily liquid chamber of residual bubble.First, exist In the state of the two ends closing for sharing recovery approach 212, liquid filling body is carried out via common feed path 211.Now, supply chamber 431 have enough width and height to carry out the filling of liquid.Liquid discharging head assumes the face for being formed with outlet Face-down posture.Although the easness of filling is according to the physics spy of the viscosity of liquid and the component wetting characteristics of liquid etc. Property value and it is different, but generally, highly preferred about more than the 4mm of supply chamber 431, and width is about 2~more than 3mm. After supply chamber 431 is filled with liquid, the two ends for sharing recovery approach 212 are opened.Therefore, liquid is gradually from supply chamber 431 Enter recovery room 432 via balancing gate pit 23, and from the bottom surface of recovery room 432 (here for towards the one of recording element substrate 10 Side) rise to the liquid filling body of recovery room 432.Afterwards, liquid is fed further to common feed path 211, thus liquid from return Room 432 is received to reach shared recovery approach 212 and flow through shared recovery approach 212.Therefore, from common feed path 211, supply All passages that room 431 shares recovery approach 212 via recording element substrate 10, recovery room 432 and arrival are filled with liquid.

In traditional fill method, from both common feed path 211 and shared recovery approach 212 liquid filling body. As described herein, by filling supply chamber 431 and via balancing gate pit 23 towards recovery room from common feed path 211 first 432 sides are filled, and can be filled in the case where that will influence the bubble of record of image and character without residual.

According to the present invention it is possible to a kind of liquid discharging head be provided, wherein in the liquid discharging head, it is suppressed that even in drive During dynamic state change heating liquid also from recovery approach countercurrently, and thereby inhibiting the driving condition of influence discharge characteristic and change Become.

While the present invention has been described with reference to the exemplary embodiments, it should be appreciated that, the invention is not restricted to disclosed Exemplary embodiments.The scope of the appended claims meets most wide explanation, to include all such modifications, equivalent structure and work( Energy.

Claims (19)

1. a kind of liquid discharging head, including：

Recording element substrate, it includes：

Outlet, for discharging liquid,

Recording element, the energy for generating to discharge liquid,

Balancing gate pit, it is internal with the recording element,

Liquid supply passage, for liquid to be supplied to the balancing gate pit, and

Liquids recovery passage, for from balancing gate pit's withdrawal liquid；And

Supporting member, for supporting the recording element substrate, the supporting member includes：

Supply chamber, for liquid to be supplied to the liquid supply passage, and

Recovery room, for from the liquids recovery passage withdrawal liquid,

Wherein, the inner volume of the recovery room is less than the inner volume of the supply chamber.

2. liquid discharging head according to claim 1, wherein, also include：

Fluid supply unit, it includes：

The recording element substrate,

The supporting member, and

Electric wiring base plates, it is connected to the recording element substrate.

3. liquid discharging head according to claim 2, wherein, also include：

Channel component, wherein being arranged with multiple fluid supply units in the channel component, the channel component includes：

Common feed path, for liquid to be supplied to multiple fluid supply units, and

Recovery approach is shared, for from multiple fluid supply unit withdrawal liquids.

4. liquid discharging head according to any one of claim 1 to 3, wherein, also include：

Vacuum cavitations unit, for generating the pressure differential between the liquid supply passage and the liquids recovery passage.

5. liquid discharging head according to any one of claim 1 to 3, wherein,

The liquid discharging head is page width type liquid discharging head, and

Multiple recording element substrates are arranged in a straight line.

6. liquid discharging head according to any one of claim 1 to 3, wherein,

The height of the recovery room is less than the height of the supply chamber.

7. liquid discharging head according to any one of claim 1 to 6, wherein,

Narrow width of the width of the recovery room than the supply chamber.

8. liquid discharging head according to any one of claim 1 to 3, wherein,

The recording element substrate also includes：

Outlet formation component, it has the outlet, and

Base main body, it has the recording element,

The liquid supply passage and liquids recovery passage formation have the recording element in the formation of the base main body Face the back side on.

9. liquid discharging head according to claim 8, wherein,

The liquid supply passage and the liquids recovery passage extend along the back side.

10. liquid discharging head according to claim 8, wherein,

The back side of the recording element substrate is provided with lid, and the lid includes：

Side opening is supplied, for liquid to be supplied to the liquid supply passage, and

Side opening is reclaimed, for from the liquids recovery passage withdrawal liquid.

11. liquid discharging head according to claim 10, wherein,

The lid constitutes at least a portion of the liquid supply passage and the liquids recovery passage.

12. liquid discharging head according to any one of claim 1 to 3, wherein,

Liquid in the balancing gate pit is circulated between the inside of the balancing gate pit and the outside of the balancing gate pit.

13. a kind of liquid discharging head, including：

Recording element substrate, wherein multiple recording elements are provided with the first face of the recording element substrate, it is the multiple The recording element is used to generate the energy to discharge liquid；

Partition wall, it is configured between adjacent recording element；And

Outlet, it is configured for recording element each described, and in face of the recording element, wherein, Duo Gesuo State outlet to be arranged in rows to form outlet row, balancing gate pit formed using the partition wall for each recording element, And the liquid in the balancing gate pit is discharged from the outlet using the recording element,

The liquid discharging head is additionally provided with：

Liquid supply passage, it is arranged on the second face of the recording element substrate, and is connected with multiple balancing gate pits,

Liquids recovery passage, it is arranged on second face, and is connected with multiple balancing gate pits,

Common feed path, for liquid to be supplied to the balancing gate pit,

Recovery approach is shared, for from balancing gate pit's withdrawal liquid,

Multiple supply chambers, it is connected with the common feed path and the liquid supply passage, and

Multiple recovery rooms, it is connected with the shared recovery approach and the liquids recovery passage,

The direction of the supply chamber and the recovery room along the outlet row is alternately arranged in the common feed path, institute State in the region that shared recovery approach and the recording element substrate are limited,

Under the holding state without discharge liquid, according to the pressure between the common feed path and the shared recovery approach Power is poor, is formed from the common feed path via the supply chamber, liquid supply passage, the balancing gate pit, described Liquids recovery passage, the recovery room and reach the shared recovery approach liquid stream, and

The inner volume of at least one recovery room is less than the inner volume of the supply chamber adjacent with the recovery room.

14. liquid discharging head according to claim 13, wherein, also include：

Vacuum cavitations unit, for generating the pressure differential between the common feed path and the shared recovery approach.

15. the liquid discharging head according to claim 13 or 14, wherein,

The height of the recovery room is less than the height of the supply chamber, and wherein short transverse is from the common feed path and institute Shared recovery approach is stated towards the direction of the recording element substrate.

16. the liquid discharging head according to claim 13 or 14, wherein,

Liquid in the balancing gate pit is discharged via the common feed path and the shared recovery approach with the liquid The outer loop of head, and

Width narrow width than the supply chamber of the recovery room on the direction of the outlet row.

17. the liquid discharging head according to claim 13 or 14, wherein,

Interval between adjacent supply chamber and recovery room is even in there is the liquid supply passage and the liquids recovery Pressure at passage can also maintain the interval of predetermined circular flow in the state of declining at the balancing gate pit.

18. the liquid discharging head according to claim 13 or 14, wherein,

Liquid in the balancing gate pit is circulated between the inside of the balancing gate pit and the outside of the balancing gate pit.

19. a kind of liquid discharge apparatus, including：

Liquid discharging head, it includes：

Recording element substrate, it includes：

Outlet, for discharging liquid,

Recording element, the energy for generating to discharge liquid,

Balancing gate pit, it is internal with the recording element,

Liquid supply passage, for liquid to be supplied to the balancing gate pit, and

Liquids recovery passage, for from balancing gate pit's withdrawal liquid,

Supporting member, for supporting the recording element substrate, the supporting member includes：

Supply chamber, for liquid to be supplied to the liquid supply passage, and

Recovery room, for from the liquids recovery passage withdrawal liquid, and with smaller than the inner volume of the supply chamber Volume；

Storage element, for storing liquid；

First circulation system, for making liquid be circulated from the storage element to common feed path；And

Second circulation system, for making liquid be circulated from the storage element to shared recovery approach.