CN110356110A

CN110356110A - Liquid supplying unit and liquid injection apparatus

Info

Publication number: CN110356110A
Application number: CN201910235099.6A
Authority: CN
Inventors: 江藤大辅
Original assignee: Kyocera Document Solutions Inc
Current assignee: Kyocera Document Solutions Inc
Priority date: 2018-03-26
Filing date: 2019-03-26
Publication date: 2019-10-22
Anticipated expiration: 2039-03-26
Also published as: CN110356110B

Abstract

The present invention provides a kind of liquid supplying unit and liquid injection apparatus.Liquid supplying unit supplies liquid to the liquid ejecting head of injection liquid from the fluid storage container of the specified liquid of storage.Liquid supplying unit includes pressure chamber, the first service duct, the second service duct, bypass service duct and pressing mechanism.It pressure chamber can storing liquid.First service duct is connected to fluid storage container with pressure chamber.Second service duct is connected to liquid ejecting head with pressure chamber.The upstream end in the liquid supply direction of bypass service duct is connected to the first service duct, and downstream is converged with the second service duct.Pressing mechanism is configured in bypass service duct, pressurizes to the liquid to circulate in the bypass service duct.Accordingly, in the liquid supplying unit of the pressure oscillation of the pressure chamber using storing liquid, the pressurization that can simply execute liquid ejecting head is removed.

Description

Liquid supplying unit and liquid injection apparatus

Technical field

The present invention relates to a kind of liquid that the liquid for being stored in fluid storage container is supplied to liquid ejecting head to supply list Member and the liquid injection apparatus for being applicable in the liquid supplying unit.

Background technique

Such as in ink-jet printer, the liquid injection that micro ink (liquid) is ejected into print object is used Head.Ink is supplied to the liquid ejecting head from the print cartridge (fluid storage container) of ink reservoir by defined service duct.With It is past, it is known that in the case where utilized head difference supplies ink to liquid ejecting head from print cartridge, will have makes the liquid ejecting head Squit hole be set as negative pressure pressure chamber liquid supplying unit (valve cell) configuration the liquid made of the service duct Injection apparatus.The liquid supplying unit of the negative pressure is formed by being arranged, even if in the case where utilized head difference supplies ink, Also inhibit the ink that unlimitedly drips from the squit hole.

It in previous liquid supplying unit, is defined, pacifies by flexible membranes using by a part of the pressure chamber of negative pressure The structure of movable valve is directly pushed mounted in the push plate (compression plate) of the flexible membranes.The movable valve utilizes force application part direction Contrary direction is exerted a force with the pushing.If the ink pressure chamber is sucked out by the liquid ejecting head Reduced pressure improve, then with the displacement of the flexible membranes, the movable valve is pushed and moved by the push plate, open to The ink feed channel of the pressure chamber and ink flows into.If flowed by the ink under the reduced pressure of the pressure chamber Drop then utilizes the active force of the force application part, and the movable valve is mobile towards opposite direction, and the pressure chamber reverts to close The state of envelope.

In the liquid ejecting head, in order to eliminate the blocking or the prevention blocking of ink jet exit, need to implement The removing of ink jet exit is handled.At this point, if the outer liquid ejecting head side that is loaded on such as suction pump is carried out the removing processing, Apparatus structure becomes complicated, it is therefore preferable that carrying out from liquid supplying unit to the ink of ink jet exit supply high pressure simultaneously The pressurization for spraying it is removed.But as described above, in the liquid supplying unit in the way of the pressure oscillation of pressure chamber In, actually there are no propose simply execute the structure pressurizeed and removed.

Summary of the invention

The purpose of the present invention is to provide a kind of liquid of pressure oscillation in the pressure chamber using storing liquid to supply list In member, it can simply execute the liquid supplying unit of the pressurization removing of liquid ejecting head and be applicable in the liquid supplying unit Liquid injection apparatus.

Liquid supplying unit involved in one aspect of the present invention is from the fluid storage container of the specified liquid of storage to injection The liquid ejecting head of the liquid supplies the liquid.Liquid supplying unit includes pressure chamber, the first service duct, the second supply Channel, bypass service duct and pressing mechanism.The pressure chamber can store the liquid.First service duct makes the liquid Body accepting container is connected to the pressure chamber.Second service duct is connected to the liquid ejecting head with the pressure chamber. The upstream end in the liquid supply direction of the bypass service duct is connected to first service duct, downstream and described second Service duct converges.The pressing mechanism is configured in the bypass service duct, to the institute circulated in the bypass service duct Liquid is stated to pressurize.

Liquid injection apparatus involved in another aspect of the present invention includes: the liquid ejecting head of the specified liquid of injection；With And the liquid supply for supplying the liquid to the liquid ejecting head from the fluid storage container for storing the liquid is single Member.

In accordance with the invention it is possible to which the pressurization for simply executing liquid ejecting head is removed.

Detailed description of the invention

Fig. 1 is the perspective view for indicating to be applicable in the appearance of ink-jet printer of the invention.

Fig. 2 is the cross-sectional view in the II-II line direction of Fig. 1.

Fig. 3 is the front view of the ink-jet printer of the state of declad.

Fig. 4 is mounted in the overall perspective view of the bracket of the ink-jet printer.

Fig. 5 is to indicate the perspective view of a liquid supplying unit and head unit involved in first embodiment.

Fig. 6 (A) and (B) are the figures for schematically showing the section in the front-back direction of head unit, and Fig. 6 (A) is indicated to execute and be beaten The state of watermark patterns, Fig. 6 (B) indicate to execute the state of circulation pattern.

Fig. 7 is the block diagram of the liquid delivery system of present embodiment, is the figure for indicating to execute the state of printing model.

Fig. 8 is the block diagram for indicating to execute the state of circulation pattern.

Fig. 9 (A) is the figure for indicating to execute the state of pressurization cleaning module, and Fig. 9 (B) is the state for indicating to execute pressure reducing mode Figure.

Figure 10 (A) and (B) are the perspective views of liquid supplying unit, and Figure 10 (A) is the perspective view from the first Room side, figure 10 (B) are the perspective views from second Room side.

Figure 11 is the perspective view for unloading the liquid supplying unit of the state of close membrane of the first Room side.

Figure 12 (A)~(C) is the perspective view for unloading the liquid supplying unit of the state of atmospheric pressure detection film of second Room side.

Figure 13 is the exploded perspective view of liquid supplying unit.

Figure 14 (A) is the perspective view of push part, and Figure 14 (B) is the perspective view of the different push part of view direction.

Figure 15 (A) is the perspective view of open and close valve, and Figure 15 (B) is the exploded perspective view of the open and close valve.

Figure 16 (A) is the XVI-XVI line cross-sectional view of Figure 10 (A), is to indicate that open and close valve is in the section view for closing the state of posture Figure, Figure 16 (B) is the enlarged drawing in the portion A1 of Figure 16 (A).

Figure 17 (A) corresponds to the figure of Figure 16 (A), is to indicate that open and close valve is in the cross-sectional view for opening the state of posture, Figure 17 It (B) is the enlarged drawing in the portion A2 of Figure 17 (A).

Figure 18 (A) and (B) are the positional relationship and pressing portion of the rotating fulcrum for illustrating push part and pressing portion The schematic diagram of the movement of part.

Figure 19 (A) is the exploded perspective view of filter chamber, and Figure 19 (B) is the cross-sectional view in the front-back direction of filter chamber.

Figure 20 (A) and (B) are the perspective views of rod unit, and Figure 20 (C) is the exploded perspective view of rod unit.

Figure 21 (A) and (B) are the perspective views of push part, open and close valve and rod unit.

Figure 22 (A) is the cross-sectional view for indicating the state before the rod unit movement, and Figure 22 (B) is by the rod unit The cross-sectional view of the state of movement and execution exhaust.

Figure 23 (A) corresponds to the perspective view in the exhaust gear portion of the state of Figure 22 (A), and Figure 23 (B) is to indicate rod unit Operation perspective view.

Figure 24 (A) is the perspective view for indicating the operation of rod unit, and Figure 24 (B) corresponds to the exhaust of the state of Figure 22 (B) The perspective view of mechanism part.

Figure 25 is the cross-sectional view in the front-back direction of liquid supplying unit.

Figure 26 is the exploded perspective view of the anti-locking mechanism of adverse current.

Figure 27 (A) is the perspective view of the anti-locking mechanism of the adverse current, is the state for indicating sphere and being set as out valve pipeline Figure, Figure 27 (B) is the figure for the state for indicating that valve pipeline is set as closing by sphere, and Figure 27 (C) is the perspective view on branch head.

Figure 28 (A) and (B) are the portion the A3 enlarged drawings of Figure 25, and Figure 28 (A) is to indicate that the adverse current under printing model prevents The cross-sectional view of the state of mechanism, Figure 28 (B) are the cross-sectional views of the state of the anti-locking mechanism of the adverse current under pressurization cleaning module.

Figure 29 (A) is the cross-sectional view of the state of umbrella valve closure communication port, and Figure 29 (B) is the state of umbrella valve open communication mouth Cross-sectional view.

Figure 30 is the perspective view for indicating the flowing of the ink under printing model.

Figure 31 is the perspective view for indicating the flowing of the ink under pressurization cleaning module.

Figure 32 is the perspective view for indicating the flowing of the ink under circulation pattern.

Figure 33 (A) is the front view of liquid supplying unit involved in second embodiment, and Figure 33 (B) is its side view, Figure 33 (C) is its top view.

Figure 34 is the perspective view for indicating the internal structure of liquid supplying unit of second embodiment.

Figure 35 is the perspective view for indicating the internal structure of liquid supplying unit of second embodiment.

Figure 36 (A) is the exploded perspective view of liquid supplying unit, and Figure 36 (B) is the different liquid supplying unit of view direction Exploded perspective view.

Figure 37 is the main body with the liquid supplying unit of the exploded perspective view of the anti-locking mechanism of adverse current of liquid supplying unit The perspective view in portion.

Figure 38 (A) is the perspective view of the push part of second embodiment, and Figure 38 (B) is the different pressing portion of view direction The perspective view of part.

Figure 39 (A) and (B) are the schematic diagrames for illustrating the movement of the push part using lever ratio.

Figure 40 (A) is the perspective view of the anti-locking mechanism of adverse current of second embodiment, is to indicate that valve pipeline is set as by sphere The figure for the state opened, Figure 40 (B) are the figures for the state that valve pipeline is set as closing by sphere, and Figure 40 (C) is the solid on branch head Figure.

Figure 41 (A) is the cross-sectional view for indicating the state of the anti-locking mechanism of the adverse current under printing model, and Figure 41 (B) is Figure 41 (A) the portion A4 enlarged drawing.

Figure 42 (A) is the cross-sectional view for indicating the state of the anti-locking mechanism of the adverse current under pressurization cleaning module, and Figure 42 (B) is The portion the A5 enlarged drawing of Figure 42 (A).

Figure 43 (A) is the perspective view of open and close valve involved in variation, and Figure 43 (B) is the exploded perspective of the open and close valve Figure.

Specific embodiment

[overall structure of printer]

In the following, being described with reference to one embodiment of the present invention.Firstly, illustrating that liquid supply according to the present invention is single The ink-jet printer that member or liquid injection apparatus are applicable in.Fig. 1 indicates ink-jet printer 1 involved in embodiment The perspective view of appearance, Fig. 2 are the cross-sectional views in the II-II line direction of Fig. 1, and Fig. 3 is the printer 1 of the state of declad 102 Front view.In addition, appending front and rear, left and right, upper and lower direction indicates in the figure that Fig. 1 is shown to Fig. 3 and below, but this Merely for convenience of description, it is not used to carry out the restriction of any direction.

Printer 1 (liquid injection apparatus) is various to the paper sheet body and resin flake body or cloth etc. of various sizes Sheet W (target) carries out the printer of the print processings such as lettering, print in a manner of ink-jet, particularly suitable for large scale and The printer of the print processing of long sheet.Printer 1 includes the pedestal 101 with Caster and is positioned in the pedestal 101 simultaneously Execute the apparatus main body 11 of the print processing.

Apparatus main body 11 includes sheet transfer passage 12, conveying roller 13, pinch roll unit 14 and bracket 2.Sheet is defeated Sending channel 12 is the transfer passage extended along the longitudinal direction, and the sheet W for that will be carried out print processing is sent into from rear side Apparatus main body 11, and sent out from front side.Conveying roller 13 is to extend in left-right direction, and generate and intermittently send out sheet conveying The roller of the driving force of the sheet W in channel 12.Pinch roll unit 14 has to be matched from the top mode opposite with conveying roller 13 It sets, and is formed together the pinch roller of conveying crack with conveying roller 13.Pinch roll unit 14 separates specified interval in the lateral direction And configured with multiple.

Bracket 2 is to carry the unit printed to sheet W, and can be reciprocal in left-right direction on pedestal 101 Mobile moving body.In the rear side of pedestal 101, erects be provided with bracket guiding element 15 in a manner of extending in left-right direction, it should Bracket guiding element 15 has the guide rail of the reciprocating movement of guide support 2.In bracket guiding element 15, can circumferentially move in left-right direction Dynamic mode is assembled with synchronous belt 16.Bracket 2 has to the fixed part of synchronous belt 16, with synchronous belt 16 forward or reverse It is described circumferential mobile, on one side by the rail guidance, move in left-right direction on one side.

The print processing executes as follows, it may be assumed that conveying roller 13 and pinch roll unit 14 intermittently convey sheet W, in the stopped process of sheet W, bracket 2 moves in left-right direction, carries out to sheet W print scanned (to sheet W Ink injection).In addition, in sheet transfer passage 12, it is thin configured with incidentally attracting in the lower section of the passage path of bracket 2 The original text platform 121 (Fig. 2) of the function of sheet body W.When carrying out the print processing, the state of original text platform 121 is adsorbed in sheet W Under, bracket 2 executes print scanned.

Apparatus main body 11 is covered by outer cover 102.Side stage 103 is configured in the region of the right side of outer cover 102.In side stage 103 inside contains fixed ink container holder 17, which keeps the ink (specified liquid) of storage print processing Print cartridge IC (Fig. 5, Fig. 6).

The forward portion of side stage 103 is the bracket buffer region 104 for keeping out of the way space as bracket 2.As shown in figure 3, Pedestal 101 separates the interval corresponding to sheet transfer passage 12 in the lateral direction and erects and be provided with left frame 105 and the right side Frame 106.If distinguished with operating area, the region between these left and right frames 105,106 is that the print processing can be performed Print area P (processing region).Bracket guiding element 15 has the left and right width for being longer than print area P, and bracket 2 is movable to printing The right outside of region P.The right end side of bracket guiding element 15, that is, the region of right neighbour of print area P is maintenance area M.Not When executing the print processing, bracket 2 keeps out of the way maintenance area M (bracket buffer region 104).In addition, aftermentioned pressurization is removed Processing also executes in the bracket buffer region 104.

Sending for volume Wa is sent out in the coiling body that the rear side of pedestal 101 has the sheet W of receiving print processing object Portion 107 out.In addition, the front side in pedestal 101 has the coiling body of sheet W after receiving print processing and batches Wb's Reeling end 108.Reeling end 108 has the driving source omited to the figure that the wireline reel for batching Wb carries out rotation driving, utilizes on one side Jockey pulley 109 applies defined tension to sheet W, batches sheet W on one side.

[structure for having the bracket of the liquid ejecting head of first embodiment]

Fig. 4 is the overall perspective view of bracket 2.Implement in bracket 2 equipped with first to sheet W jet ink (liquid) Head unit 21 (liquid ejecting head) involved in mode and the liquid that ink is supplied from print cartridge IC (Fig. 5) to head unit 21 are supplied single Member 3.In fig. 4 it is shown that 2 title unit 21 and 8 liquid supplying units 3 are equipped on the example of bracket 2.That is, in order to supply Answer cyan, magenta, yellow, black each ink and 4 liquid supplying units 3 are equipped with to every 1 title unit 21.In addition, The ink to each liquid supplying unit 3 filling different colours can also be used, the ink of most 8 colors is sprayed from 2 head units 21 The mode of water.

Bracket 2 has head unit 21 and keeps the Support frame 20 of head unit 21.Support frame 20 includes: being located at most lower Lower layer's frame 201 of side；In the upper layer frame 202 that the top interval of lower layer's frame 201 configures；It is assembled in upper layer frame The upper surface of 202 frame 203；And it is mounted on the subsequent back side frame 204 of upper layer frame 202.Lower layer's frame 201 and upper layer frame Frame 202 is concatenated by the connection pillar 205 vertically extended.The overleaf ball wire that frame 204 is omited equipped with figure Thick stick mechanism is installed in lower layer's frame 201 with the driven nut portions of the ball-screw.In addition, overleaf frame 204 has edge The guide post 206 that up and down direction extends.By the driving of the ball screw framework, lower layer's frame 201 and upper layer frame 202 Union body can be guided on one side pillar 206 guidance, on one side move along the vertical direction.That is, the main part of bracket 2 It can be moved along the vertical direction relative to back side frame 204.Moreover, overleaf the setting of frame 204 is provided with the aftermentioned upstream of installation The backplate 207 of the upstream end 331 of pipe 33.

In lower layer's frame 201 equipped with head unit 21.The main part of bracket 2 can move along the vertical direction as described above, Therefore, it can adjust the height and position of the up and down direction of the head unit 21 relative to sheet W.On upper layer, frame 202 is equipped with liquid Body supply unit 3.8 liquid supplying units 3 are supported in a manner of arranging in left-right direction by upper layer frame 202 in frame 203. Overleaf frame 204 has the directed section being guided with the guide rail of bracket guiding element 15 and to the fixed part of synchronous belt 16 Deng.

Fig. 5 is to indicate the perspective view of a liquid supplying unit 3 and head unit 21 involved in first embodiment.Liquid Supply unit 3 includes: the main part 30 for having tank portion 31 and pumping section 32；Configure the ink feed direction (liquid in main part 30 Supply direction) upstream side upstream tube 33 (a part of the first service duct)；Configuration is under the downstream side of main part 30 Play pipe 34 (a part of the second service duct)；And 3 side of liquid supplying unit is returned to from 21 side of head unit as by ink Path foldback pipe 35 (foldback path)；Monitor pipe 36；And shunt valve 32P (bypass service duct).

Tank portion 31 is the region to form the space for being temporarily stored in the ink that head unit 21 is supplied under subnormal ambient.Pump Portion 32 is receiving 9 (pressing mechanisms of pump；Fig. 7 is to the region of Fig. 9), and the pump 9 is in the reduced pressure treatment for being used to form the subnormal ambient When, for clean head unit 21 (ink blowing unit 22) pressurization remove processing when and make ink in head unit 21 and liquid The operating when circular treatment recycled between supply unit 3.

Upstream tube 33 is the supply pipe for being connected to tank portion 31 (second Room 42) with print cartridge IC (fluid storage container).Upstream tube 33 upstream end 331 is connected to the terminal part of the pipe 330 extended from print cartridge IC, and downstream 332 is connected to the entrance in tank portion 31 Part.The supply valve 33V for playing the effect of opening and closing upstream tube 33 is installed in pipe 330.If supply valve 33V is opened, it is in The state of ink can be supplied from print cartridge IC to tank portion 31, if supply valve 33V is closed, in the shape that not can be carried out the supply State.

Downstream tube 34 is the supply pipe for being connected to tank portion 31 (second Room 42) with head unit 21.The upstream end of downstream tube 34 341 prevent mechanism part 38 to be connected to the exit portion in tank portion 31 by aftermentioned adverse current, and downstream 342 is connected to head unit 21. Foldback pipe 35 is the pipe for head unit 21 to be connected to tank portion 31 (second Room 42).The upstream end 351 of foldback pipe 35 is connected to Head unit 21, downstream 352 are connected to tank portion 31.Clip 35V for being opened and closed foldback pipe 35 is installed in the foldback pipe 35.? The state that clip 35V flattens foldback pipe 35 and the foldback pipe 35 closing is shown in Fig. 5.Monitoring pipe 36 indicates in tank portion 31 The pipe of ink degree.Shunt valve 32P is not to be transported to down ink via the subnormal ambient (second Room 42) in tank portion 31 The pipeline of play pipe 34.Shunt valve 32P includes configuration in the bypass upstream tube BP1 of the upstream side of pumping section 32 and configures in downstream side Bypass downstream tube BP2.

Head unit 21 includes ink blowing unit 22, control unit portion 23, end pipe 24 and recovery tube 25.Ink blowing unit 22 is The nozzle segment that ink droplet is sprayed towards sheet W.As the spray mode of the ink droplet in ink blowing unit 22, applicable utilization The piezo electrics of piezoelectric element utilize hot mode of heating element etc..Control unit portion 23 has control 22 institute of ink blowing unit The control base board of the piezoelectric element or the heating element that have is controlled and is moved from the ejection of the ink droplet of ink blowing unit 22 Make.

End pipe 24 is the downstream 342 for connecting downstream tube 34 and the pipe of ink blowing unit 22.Downstream 342 is hat type socket joint Head, can once-through operation be installed on the upper end fitting portion of end pipe 24.Recovery tube 25 is connection ink blowing unit 22 and foldback pipe 35 The pipe of upstream end 351.In addition, discharge is enclosed in the preservation of liquid supplying unit 3 when recovery tube 25 is also used to use in the early stage Liquid.Initial stage in use, the downstream 342 of downstream tube 34 is mounted on the upper end fitting portion of end pipe 24, the connection of recovery tube 25 in addition Pipe, pass through opening it is described save liquid storage space, execute discharge it is described save liquid movement.

Fig. 6 (A) and (B) are the figures for schematically showing the section in the front-back direction of head unit 21, and Fig. 6 (A) indicates clip 35V is the state (printing model) closed, and Fig. 6 (B) indicates the state (circulation pattern) that clip 35V is out.Ink blowing unit 22 has Standby multiple ink squit hole 22H (liquid spraying outlet) that ink is sprayed towards sheet W.Have individually in the inside of head unit 21 Respective channel 26 of the ground to ink squit hole 22H supply ink and the shared pathway to these respective channels 26 supply ink 27。

Shared pathway 27 is horizontally extending ink channel.The upstream end of each respective channel 26 and shared pathway 27 Connection.The downstream 342 of downstream tube 34 is connected to the upstream side of shared pathway 27 by end pipe 24.The upstream end of foldback pipe 35 351 are connected to the downstream side of shared pathway 27 by recovery tube 25.In other words, the upstream side of shared pathway 27 passes through downstream tube 34 are connected to tank portion 31 (second Room 42), and the downstream side of shared pathway 27 is connected to 31 (second Room of tank portion by foldback pipe 35 42)。

As shown in Fig. 6 (A), using clip 35V, foldback pipe 35 is set in the state of closing, if from downstream tube 34 to Head unit 21 supplies ink, then the ink is sprayed via shared pathway 27 and each respective channel 26 from ink squit hole 22H.Separately On the one hand, as shown in Fig. 6 (B), in the state that clip 35V is opened and foldback pipe 35 is set to out, if from downstream tube 34 supply ink to head unit 21, then the ink returns to tank portion 31 exclusively by foldback pipe 35.At this point, if foldback pipe 35 By negative pressure, then ink will not be leaked out from ink squit hole 22H.

[summary of liquid delivery system]

In the present embodiment, it is configured in the top of head unit 21 using print cartridge IC, utilized head difference is to head unit 21 Supply the apparatus structure of ink.It is from the beginning single if supplied under normal pressure in the case where utilized head difference supplies ink The ink blowing unit 22 of member 21 sprays ink always.Therefore, it is necessary to the setting manufacture subnormal ambients in the supply path of ink Ink blowing unit 22 is set as appropriate negative pressure by negative pressure forming portion.The tank portion 31 of liquid supplying unit 3 is as the negative pressure Forming portion and play a role.

Fig. 7 is the block diagram of the liquid delivery system used in the bracket 2 for show diagrammatically in present embodiment.Print cartridge IC quilt Configuration is in the position than 22 height h of ink blowing unit.Height h becomes head difference, utilizes the head difference, the ink of print cartridge IC It is supplied to head unit 21.Liquid supplying unit 3 is assembled into the ink feed path between print cartridge IC and head unit 21 On the way.The tank portion 31 of liquid supplying unit 3 include: by the head difference and become pressure higher than atmospheric pressure the first Room 41 (on Swim room/first service duct a part)；And configure relative to the first Room 41 in the downstream side in ink feed direction, and by It is set as the second Room 42 (pressure chamber) of negative pressure.First Room 41 is the room for not carried out negative-pressure operation, become in addition to atmospheric pressure with It is also applied the room of the pressure P based on the head difference outside.If the density (ink can be treated in density with water phase etc.) of water is ρ, acceleration of gravity g, when head difference is h, pressure P is indicated with P=ρ gh [Pa].First Room 41 by upstream tube 33 with Print cartridge IC connection.Second Room 42 is connected to by downstream tube 34 with ink blowing unit 22.

6 (the opening/closing portion of open and close valve for being linked to push part 5 is configured in the wall surface for defining the first Room 41 and second Room 42 Part).In addition, a part for defining the wall portion of second Room 42 is formed by atmospheric pressure detection film 7 (flexible membranes component).If second Become the negative pressure more than defined threshold value in room 42, then atmospheric pressure detection film 7 detects atmospheric pressure and shifts.The displacement force is applied In push part 5, the posture for the open and close valve 6 being concatenated is to open posture from posture changing is closed, and the first Room 41 becomes with second Room 42 Connected state.Ink feed path when common print processing is to pass through upstream tube 33, the first Room 41, second Room 42 and downstream The path of pipe 34.In addition to this, it is also equipped with the shunt valve for not making 34 short circuit of the first Room 41 and downstream tube via second Room 42 32P.The upstream end of shunt valve 32P is connect by the first Room 41 with upstream tube 33, and downstream and downstream tube 34 converge (fluidic junction a).Shunt valve 32P configured with can positive and negative rotation pump 9.

Fig. 7 is the figure for indicating to execute the state for the printing model that the liquid delivery system prints.In the printing Under mode, the supply valve 33V of upstream tube 33 is opened, and the clip 35V of foldback pipe 35 is closed.In the printing model, first The ink of specified amount is filled in room 41 and second Room 42, second Room 42 is set to defined negative pressure.The pressure of first Room 41 As described above based on head difference be atmospheric pressure+ρ gh [Pa], in can at any time utilized head difference from print cartridge IC supply ink shape State.As the basic settings of printing model, in order to second Room 42 is set as negative pressure and open and close valve 6 is in and closes posture, the first Room 41 are in segregate state with second Room 42.Pump 9 is in halted state.Pump 9 is tube pump, when the pump 9 stops, shunt valve 32P is in closed state.Therefore, downstream tube 34 and ink blowing unit 22 also become the state for being maintained at negative pressure.

In order to successfully fill ink to second Room 42, exhaust gear portion 37 is attached in second Room 42.Initially using When and maintenance after etc., need the ink initial stage of specified amount being filled into second Room 42.Exhaust gear portion 37, which makes to be set, to be negative (air of discharge second Room 42) is temporarily communicated with the atmosphere in the second Room 42 in pressure ring border, and the initial stage is promoted to fill.In addition, sometimes The ink for being housed in second Room 42 generates bubble because of high thermalization.Exhaust gear portion 37 is also removed because described in from second Room 42 Bubble and when air generated, are used.

If head unit 21 works, ink blowing unit 22 sprays ink droplet, then the ink in second Room 42 is consumed, with This, the degree of the negative pressure of second Room 42 is also in progress.That is, ink blowing unit 22 is whenever spraying ink droplet, carry out from being in With the movement of 42 extracting liquid of second Room of the state of isolated from atmosphere, improve the vacuum degree of second Room 42.Also, with second The reduction of ink in room 42, if the second Room 42 becomes the negative pressure more than defined threshold value, as described above, atmospheric pressure is examined Film 7 is surveyed to detect atmospheric pressure and shift.Using the displacement force, by push part 5, the posture of open and close valve 6 is from posture changing is closed Posture is opened, the first Room 41 becomes connected state with second Room 42.Therefore, using the pressure difference of two Room, from the first Room 41 to second Room 42 flows into ink.

With the inflow of the ink to second Room 42, the vacuum degree of the second Room 42 gradually mitigates, and close to atmospheric pressure.Together When, it is also gradually become smaller from atmospheric pressure detection film 7 to the displacement force that push part 5 applies.Also, it is lower than if second Room 42 becomes The negative pressure of threshold value as defined in described, open and close valve 6, which is restored to, closes posture, and the first Room 41 is again at segregate shape with second Room 42 State.At this point, it is corresponding with from the first Room 41 inflow amount of second Room 42, it is supplemented based on head difference from print cartridge IC to the first Room 41 Ink.Under printing model, such movement is repeated.

The liquid delivery system of present embodiment can also carry out circulation pattern, pressurization other than the printing model Cleaning module and pressure reducing mode.Circulation pattern is to make ink circulation using foldback pipe 35, removes the ink being present in head unit 21 The mode of the air of aquaporin (respective channel 26, shared pathway 27).The cleaning module that pressurizes is to eliminate or prevent ink from spraying Ink jam in portion 22 out, the mode that Xiang Moshui blowing unit 22 supplies the ink of high pressure and sprays it.Pressure reducing mode is to use In in initial use and after maintenance etc., the second Room 42 of normal pressure state is set as to the mode of the defined negative pressure.

Fig. 8 is the block diagram for indicating to execute the state of circulation pattern.Under the circulation pattern, supply valve 33V is closed and upstream Pipe 33 is in a closed state, and on the other hand, clip 35V is opened and foldback pipe 35 is in the state opened.In addition, configuration is on side The pump 9 of road pipe 32P is driven forward.As shown in Fig. 6 (A), the upstream end 351 of foldback pipe 35 is connected to common in head unit 21 The downstream in channel 27.On the other hand, the downstream 352 of foldback pipe 35 is connected to the first Room 41.In addition, the downstream of foldback pipe 35 End 352 is connected to by the first Room 41 being directly connected to open and close valve 6 also second Room 42.

If pump 9 is driven forward under circulation pattern, ink passes through the downstream side by bypass downstream tube BP2, fluidic junction a Downstream tube 34, the shared pathway 27 in head unit 21, foldback pipe 35 and bypass upstream tube BP1 formed circulating path and follow Ring.At this point, supply valve 33V is closed, therefore, become negative by the ink attraction movement foldback pipe 35 and shared pathway 27 of pump 9 Pressure.It therefore, will not be from ink squit hole 22H leak ink.By executing circulation pattern, the sky of 21 side of head unit can will be entered Gas is recovered to liquid supplying unit 3 (the first Room 41).Hereby it is possible to not allow air trapping in respective channel 26 and ink squit hole 22H, the ejection for being able to suppress ink are bad.In addition, the air for being recycled to the first Room 41 can be transferred to by open and close valve 6 Second Room 42.Then, the air is discharged into outside using exhaust gear portion 37.

Fig. 9 (A) is the figure for indicating to execute the state of pressurization cleaning module.Under the cleaning module that pressurizes, pump 9, which is rotated forward, to be driven It is dynamic.Clip 35V is closed.Pass through the forward drive of pump 9, ink detour second Room 42, from upstream tube 33 via the first Room 41 and side Road pipe 32P and be directly toward downstream tube 34.That is, being supplied to ink blowing unit 22 using the ink that pump 9 pressurizes.According to This forcibly sprays ink from ink blowing unit 22, and ink blowing unit 22 is cleaned.In addition, same as pressurization cleaning module It is performed when discharge is enclosed the preservation liquid of liquid supplying unit 3 when movement also uses in the early stage.

In this way, in the present embodiment, from print cartridge IC into the liquid supply path of head unit 21, and pass through second Room 42 Path be equipped with the path by shunt valve 32P side by side.In shunt valve 32P configured with pump 9.It therefore, can not be via having The second Room 42 of negative pressure mechanism, using shunt valve 32P by pressurized ink feed to head unit 21.That is, with second Room 42 The simple structure for configuring shunt valve 32P and pump 9 side by side, can simply execute and carry out pressurization removing to ink blowing unit 22 Movement.

Moreover, pressurized ink passes through downstream tube 34 to second Room 42 in order to prevent when executing pressurization cleaning module Countercurrently, having adverse current prevents mechanism part 38.Adverse current prevents the converging in downstream tube 34 and the downstream of shunt valve 32P of mechanism part 38 The upstream side of portion a is configured in downstream tube 34.By countercurrently preventing mechanism part 38, the upstream side of the fluidic junction a of downstream tube 34 is sealed It closes, therefore, in the high pressure ink that shunt valve 32P is generated all towards ink blowing unit 22.It is therefore prevented that defining second Room 42 The breakage of atmospheric pressure detection film 7.

Fig. 9 (B) is the figure for indicating to execute the state of pressure reducing mode.Under pressure reducing mode, pump 9 is inverted driving.Clip 35V It closes.If pump 9 is inverted driving, by downstream tube 34 and shunt valve 32P, ink blowing unit 22 and second Room 42 are subtracted Pressure.Ink blowing unit 22 and second Room 42 are set to defined negative pressure by the pressure reducing mode, that is to say, that are set to i.e. Make in the case where carrying out head difference supply, ink droplet will not leak out the negative pressure dripped from ink blowing unit 22.In addition, if by black Water blowing unit 22 is set as excessive negative pressure, sometimes due to the driving of piezoelectric element in ink blowing unit 22 etc. ink spray by To obstruction.Therefore, ink blowing unit 22 and second Room 42 are for example preferably set to the weak negative pressure of -0.2~-0.7kPa or so.

[overall structure of liquid supplying unit]

Then, the supply of liquid involved in the present embodiment for each mode that the liquid delivery system can be performed is described in detail The structure of unit 3.Figure 10 (A) and (B) are the perspective views of liquid supplying unit 3, and Figure 10 (A) is vertical from 41 side of the first Room Body figure, Figure 10 (B) are the perspective views from 42 side of second Room.Figure 11 is the shape for indicating to unload the close membrane 7A of 41 side of the first Room The perspective view of the liquid supplying unit 3 of state, Figure 12 (A)~(C) are the shapes for indicating to unload the atmospheric pressure detection film 7 of 42 side of second Room The perspective view of the liquid supplying unit 3 of state.Figure 13 is the exploded perspective view of liquid supplying unit 3.

It is such as illustrated based on Fig. 7~Fig. 9 (B) preparation property, liquid supplying unit 3 includes having tank portion 31 and pumping section 32 Main part 30, upstream tube 33, downstream tube 34, foldback pipe 35, shunt valve 32P, exhaust gear portion 37, countercurrently prevent mechanism part 38, push part 5, open and close valve 6 and atmospheric pressure detect film 7.In addition, liquid supplying unit 3 includes: for monitoring second Room 42 Ink level monitoring pipe 36；And constitute the close membrane 7A for defining a part of wall surface of the first Room 41.

Main part 30 has the base substrate 300 (Figure 11) formed by the plate extended along the longitudinal direction.Base substrate 300 Front side be as tank portion 31 substrate tank portion substrate 310 (wall portion), rear side be pumping section 32 formed shell structure Pumping section shell 320.In tank portion, the left side side of substrate 310 configures the first Room 41, configures second Room 42 in right side side.First Room, 41 He Second Room 42 be can ink reservoir space.In tank portion, substrate 310 is pierced by the connection for being connected to the first Room 41 with second Room 42 Mouth 43.The open and close valve 6 is configured in the communication port 43.

As shown in figure 11, the first Room 41 space shape narrow by the width of the shape U-shaped when substantially being overlooked from left At.It is defined wall 411 and be defined by be provided projectingly to the left from tank portion substrate 310 first in first Room 41.First defines wall 411 are formed by separating opposite a pair of of the wall flaps of predetermined distance.The inflow part 412 of upstream end as the first Room 41 is connected to aftermentioned Filter chamber 44.The ink for being supplied to tank portion 31 from upstream tube 33 flows into the first Room 41 via filter chamber 44 from inflow part 412.

First Room 41 is in, then downward curved shape horizontally extending from inflow part 412 towards front.? The downstream of first Room 41 is connected with bypass room 413 and foldback communication chamber 414 with Y-branch shape.Bypass room 413 is to use In the region of the first Room of connection 41 and bypass upstream tube BP1.It is connected in the wall portion for the lower end for defining bypass room 413 Bypass the upstream end of upstream tube BP1.Foldback communication chamber 414 is the region for connecting the first Room 41 and foldback pipe 35.It is defining Wall portion near the front end of foldback communication chamber 414 is connected with the downstream 352 of foldback pipe 35.In addition, will be returned in Fig. 7 and Fig. 8 The a part for sending communication chamber 414 to be used as foldback pipe 35.

It is configured with lower monitoring communication chamber 415 in the top of foldback communication chamber 414, in the top of the horizontal component of the first Room 41 Configured with upper monitoring communication chamber 416.The upstream end 361 of monitoring pipe 36 is connected to lower monitoring communication chamber 415, monitors the downstream of pipe 36 Pipe 362 is connected to monitoring communication chamber 416.Figure 12 is also referred to, substrate 310 has been pierced by lower intercommunicating pore 41A in tank portion and configuration exists The upper intercommunicating pore 41B of the top of the lower intercommunicating pore 41A.Lower monitoring communication chamber 415 is connected to second Room by lower intercommunicating pore 41A 42, upper monitoring communication chamber 416 is connected to second Room 42 by upper intercommunicating pore 41B.That is, monitoring pipe 36 is connected to second Room 42 upper end side and lower end side monitors that the ink level in pipe 36 and the ink level in second Room 42 link.

In the present embodiment, monitoring pipe 36 is formed by transparent pitch tube.Therefore, user confirms monitoring pipe by visual observation 36, the ink level being able to know that in second Room 42.In the present embodiment, as shown in figure 4, using in bracket 2 along right and left To the structure for configuring multiple liquid supplying units 3 side by side.Therefore, even if being located at the atmosphere of right side using transparent film Pressure detection film 7 can not ink level in visual confirmation second Room 42 other than the liquid supplying unit 3 of most right part.But It is in the present embodiment, the structure of setting monitoring pipe 36 to be erect using the front side in liquid supplying unit 3.Therefore, user By the monitoring pipe 36 of each liquid supplying unit 3 of front side visual confirmation from bracket 2, the ink being able to know that in each second Room 42 Aqueous position.

It is nearby provided projectingly towards left in the center of the up and down direction of first Room 41 and is formed by the cavity of cylindrical shape Spring base 417.Spring base 417 is the cavity for accommodating aftermentioned force application spring 45, to 42 side opening of second Room.First Room 41 is set It is set to the substantially half-turn of the periphery wall around the spring base 417.Compartment 418 is equipped in the rear side of spring base 417.Compartment 418 are arranged to reduce the volume of the first Room 41 as far as possible.If the volume of the first Room 41 becomes larger, the ink quantitative change stored It is more.When bracket 2 is mobile, oscillatory forces are applied to liquid supplying unit 3, if the weight of ink is big, atmospheric pressure due to inertia force Detection film 7 and close membrane 7A are possible to removing or damaged.In addition, also can be omitted in the case where such possibility does not occur Compartment 418, such as the first Room 41 is set as to surround spring base 417.

Communication port 43 configures in the first Room 41 in the top position of spring base 417.In the first Room 41, from tank portion substrate 310 are provided projectingly the protruding portion 419 of cylinder type towards left.Communication port 43 to run through the protruding portion 419 in left-right direction Mode is set.First Room 41 is not carried out reduced pressure treatment etc., and the pressure based on head difference is also applied other than atmospheric pressure The room of power P=ρ gh.If ink flows into the first Room 41 from inflow entrance 412, from bypass room 413, foldback communication chamber 414 successively start to accumulate ink.If the liquid level of ink is more than communication port 43, becoming can be by the communication port 43 to second Room The state of 42 supply inks.In addition, if 9 operating of pump is stored in the ink quilt of the first Room 41 then by bypass upstream tube BP1 Attract, and by bypass downstream tube BP2 and downstream tube 34, is supplied by the ink of high-pressure trend towards head unit 21.

Referring especially to Figure 12 (A)~(C), Figure 13, second Room 42 is in circular shape when overlooking from right.To the second Room 42 are assembled with the push part 5 and open and close valve 6, aftermentioned force application spring 45 and rod unit 46.Figure 12 (A) indicate these four A component is assembled into the state of second Room 42, and Figure 12 (B) indicates the state that push part 5 is removed, and Figure 12 (C) indicates opening and closing The state that valve 6 and force application spring 45 are removed.

Second Room 42 is defined wall 421 towards right is provided projectingly second from tank portion substrate 310 and is defined.Second defines wall 421 be the wall in the shape of cylinder type.Second Room 42 is in across tank portion substrate 310 and phase with the first Room 41 for being located at left side To positional relationship.The spring base 417 is in the center for being defined the region that wall 421 surrounds by the second of cylinder type, i.e., The concentric position recess of wall 421 is defined with second to be arranged in tank portion substrate 310.Force application spring 45 is housed in the spring base 417 Recess portion in.Communication port 43 configures on spring base 417 on the plumb line by the central point of spring base 417.

In 422 side of the upper end of second Room 42 configured with the rod unit 46 for carrying out the exhaust of second Room 42.In lower end Portion 423 (lowest part of second Room 42) defines wall 421 second and has been pierced by supply orifice 42H.The upstream end 341 of downstream tube 34 is logical Crossing countercurrently prevents mechanism part 38 to be connected to supply orifice 42H.Corresponding to supply orifice 42H, second Room 42 countercurrently prevents mechanism part 38 And downstream tube 34 is configured to along the vertical direction: mechanism part 38 countercurrently being prevented to be located at the lower section of second Room 42, downstream tube 34 and bypass The fluidic junction a of the downstream of pipe 32P (bypass downstream tube BP2) is located at the lower section for countercurrently preventing mechanism part 38.It is stored in second The ink of room 42 prevents mechanism part 38 to be supplied in a manner of being attracted by ink blowing unit 22 by supply orifice 42H and adverse current Downstream tube 34.About mechanism part 38 is countercurrently prevented, will be described later in detail.

Near lower end 423, a pair of support plate 424 in front and back is provided projectingly from tank portion substrate 310 towards right.One Has the pivotal support portion 425 of the aftermentioned push part 5 of pivotal support respectively to support plate 424.The lower intercommunicating pore 41A exists The position for being adjacent to the front of the support plate 424 in front is piercing in tank portion substrate 310.In addition, upper intercommunicating pore 41B is in upper end 422 are nearby piercing in tank portion substrate 310.

It has been provided projectingly protruding portion 426 upward in the upper end of second Room 42 422 and has kept frame 427.Protruding portion 426 be the cylinder extended above vertical, has the i.e. prominent hole 42A (figure of opening that second Room 42 is communicated with the atmosphere in inside 22(A)).Frame 427 is kept to be formed by a pair of frames piece being configured in a manner of clamping protruding portion 426 in the longitudinal direction. Has the engagement pawl 428 towards direction bending opposite mutually in each upper end for keeping frame 427.Protruding portion 426 and holding frame Frame 427 constitutes a part in exhaust gear portion 37, assembles the rod unit 46 (Figure 20 (A)) of explained later.

Referring to Fig.1 1, filter chamber 44 is configured in the upstream side in the ink feed direction of the first Room 41.Filter chamber 44 with it is upper Play pipe 33 constitutes the path from print cartridge IC to the first Room 41 supply ink together.The cross sectional shape of the left and right directions of filter chamber 44 is Rectangle has the inner wall 441 for defining the space extended along ink feed direction in square tube shape.(Figure 19 is being described in detail below (A)), filter chamber 44 is the holding member for accommodating the filter element 442 for removing the foreign matter in ink, the filter element 442 443 and fixed filter element 442 coil spring 446 etc. space.Roof in filter chamber 44 is pierced by the inflow of ink Mouth 44H (Figure 19 (B)).Corresponding to inflow entrance 44H, roof setting is provided with the inflow port formed by adaptor plug 447 (Figure 25).The downstream 332 for being connected with upstream tube 33 is inserted into inflow port 447.

The opening of 0 (A) and (B), Figure 13 referring to Fig.1, the left side side of the first Room 41 are closed by the close membrane 7A of resin.Envelope It closes film 7A and hides the first Room 41 in not only covering, but also hiding bypass room 413, foldback communication chamber 414, lower monitoring can be covered The outer shape of communication chamber 415, upper monitoring communication chamber 416 and filter chamber 44.By the peripheral part welding of close membrane 7A or viscous It is connected to first and defines wall 411 and the open end of other walls, close membrane 7A closes the opening of each room.

The opening of the right side side of second Room 42 is detected with the flexible atmospheric pressure formed by the membrane element of resin Film 7 is closed.Atmospheric pressure detection film 7 is consistent in wall shape when overlooking from right for defining wall 421 with the second of second Room 42 Circular outer shape.The peripheral part welding of atmospheric pressure detection film 7 is adhered to the second open end for defining wall 421, closes The opening of second Room 42.In addition, atmospheric pressure detection film 7 is fused or is bonded in the state of not particularly being applied tension.

Pumping section 32 is adjacent to the rear obliquely downward in tank portion 31 and is configured, and has the pump chambers 321 and pivot of receiving pump 9 The camshaft insertion hole 322 that the camshaft 93 (Fig. 4) of the eccentric cam 91 (Figure 25) of support pump 9 is inserted through.Pump chambers 321 are to match Set the cylindric chamber in pumping section shell 320.Camshaft insertion hole 322 is that the position concentric with pump chambers 321 is arranged in Prominent hole.The opening of the right side side of pump chambers 321 is by pump cover 323 (Figure 10 (B)) closing.It is prominent in the trailing flank of pumping section shell 320 There are two positioning pins 391 for setting out, have been provided projectingly rib 392 in downside.These positioning pins 391 and rib 392 are used as liquid Positioning element when supply unit 3 is equipped on bracket 2 and function.

The liquid supplying unit 3 of present embodiment is integrally formed by tank portion 31 and pumping section 32.That is, the base as tank portion 31 The tank portion substrate 310 of plate and the pumping section shell 320 for having pump chambers 321 are integrated, liquid supplying unit 3 itself equipped with The pump 9 of pressurization removing.Hereby it is possible to realize the densification of the apparatus structure of bracket 2, simplify.

[detailed construction of negative voltage supply mechanism]

In the following, narration is corresponding with the reduction of ink in second Room 42 in detail, supplied from the first Room 41 to second Room 42 The negative voltage supply mechanism of ink.Negative voltage supply mechanism illustrates push part 5, the opening and closing of the summary acted based on Fig. 7 before including Valve 6 and atmospheric pressure detect film 7, are also equipped with force application spring 45 (force application part).The configuration of open and close valve 6 is in communication port 43, in the company of closing Closing posture and opening opening for communication port 43 for port 43 carries out posture changing between posture.Force application spring 45 applies to open and close valve 6 The power in the direction of posture is closed described in.Push part 5 can push open and close valve 6 towards the direction for opening posture.Atmospheric pressure It detects the negative pressure that film 7 is generated based on the reduction with the ink in second Room 42 and shifts, and the displacement force is transferred to and is pushed away Splenium part 5.

Figure 14 (A) and (B) are the perspective view of the mutually different push part 5 of view direction, and incidentally show open and close valve 6.Push part 5 is the component being rotationally configured in second Room 42.Push part 5 has: being formed by circular plate Plectane portion 51；A pair of of the arm 52 extended downward from the lower end side 5C in plectane portion 51；Prolonging for each arm 52 is set Stretch the fulcrum 53 of distal portion (lower end)；A pair of links protrusion 54 (pressing portion) for the upper end side 5D configured in plectane portion 51； And receive inclined-plane 55 with what rod unit 46 interfered.A pair of of fulcrum 53 is by a pair of of support plate 424 for configuring in second Room 42 Pivotal support portion 425 (Figure 12) pivotal support.Accordingly, plectane portion 51 can be rotated around the axis of fulcrum 53.

Plectane portion 51 is the internal diameter for defining wall 421 relative to the second of the cylinder type for defining second Room 42, has 1/2 or so Size diameter plectane.Second defines wall 421 and by the plectane portion 51 in the state of 425 pivotal support of pivotal support portion Configuration relation substantially same heart shaped.Plectane portion 51 has: the first opposite face 51A with atmospheric pressure detection film 7；And and open and close valve 6 opposite the second (opposite with tank portion substrate 310) face 51B.In the radial center in plectane portion 51, with prominent from the second face side 51B Mode be equipped with spring mosaic process 511.It is fitted into the second face side 51B of the spring mosaic process 511 and is formed by coil spring Force application spring 45 right part.In addition, the region of spring mosaic process 511 becomes columned recessed in the first face side 51A Portion.

Plectane portion 51 has: receiving the compression zone 5A of displacement force from atmospheric pressure detection film 7；And made from force application spring 45 Firmly by force section 5B.Compression zone 5A is set at the specified position of the first face 51A in plectane portion 51.In present embodiment In, compression zone 5A is the region of the peripheral part of spring mosaic process 511 in the first face 51A.It is the second face side 51B by force section 5B The region of spring mosaic process 511 that is fitted of force application spring 45.That is, being set at by force section 5B opposite with compression zone 5A The position answered.

In the case where compression zone 5A does not receive displacement force from atmospheric pressure detection film 7, plectane portion 51 is suberect in connecing State.But the right end in force application spring 45 is connected to and is contacted with by force section 5B, the first face 51A using its active force Atmospheric pressure detects the state of the inner face of film 7.On the other hand, if compression zone 5A detects film 7 by force application spring 45 from atmospheric pressure Active force more than displacement force, then plectane portion 51 around fulcrum 53 axis towards left rotate, become to the left from upright state The inclined state in side.

A pair of of arm 52 is separated from each other along the longitudinal direction and configures the lower end side 5C in plectane portion 51.A pair of of arm 52 it is each Upper end 521 just extends more up than the lower end side 5C in plectane portion 51, and is located under the both sides of spring mosaic process 511 Side.The distal portion 522 of a pair of of arm 52 is linearly extended downward from lower end side 5C respectively.From distal portion 522 along preceding Rear direction has been provided projectingly each fulcrum 53.Specifically, it is provided projectingly from the leading flank of the distal portion 522 of front side towards front There is fulcrum 53, has been provided projectingly fulcrum 53, and a pair of of fulcrum 53 towards rear from the trailing flank of the distal portion 522 of rear side It is provided projectingly towards the direction left mutually.Fulcrum 53 is embedded in the pivotal support portion 425 of support plate 424.In arm 52 Fulcrum 53 is arranged in distal portion 522, facilitates the upper end side 5D for increasing plectane portion 51 when push part 5 is rotated around fulcrum 53 Amplitude of fluctuation.

A pair of of fulcrum 53 is arranged on the rotation axis 5AX extended along the longitudinal direction.The fulcrum 53 of front side and rear side Fulcrum 53 separates defined interval D and is configured.That is, a pair of of fulcrum 53 is across the plane for being equivalent to plectane portion 51 The part of the middle section in direction and leave configuration mutually.Interval D for example may be set to the diameter in plectane portion 51 40%~ 90% or so size.Accordingly, the rotating fulcrum that a pair of of fulcrum 53 is formed becomes the middle section that plectane portion 51 is clamped in separation Degree wide cut rotating fulcrum.Therefore, the plectane portion 51 around rotating fulcrum rotation is difficult to around perpendicular to rotation axis 5AX Axis and reverse.Therefore, the rotational action in plectane portion 51 can be made to stablize.

A pair of links protrusion 54 is provided projectingly near the upper end side 5D in plectane portion 51 from the second face 51B towards left.In detail For thin, it is equipped with using upper end side 5D in plectane portion 51 as opening edge and towards the notch 512 of radially inner side extension, from towards this The side edge of the front and back in the space of notch 512 erects the link protrusion 54 for being provided with and being formed by the plate of rectangle respectively.Respectively connect Bar protrusion 54 has tie rod holes 541.The tie rod holes 541 are combined for the connecting rod of push part 5 and open and close valve 6.Pass through the connecting rod In conjunction with the on-off action of open and close valve 6 and the rotational action of push part 5 link.

In other words, link protrusion 54 becomes the rotational action for corresponding to the push part 5 rotated around the axis of fulcrum 53, Pushing open and close valve 6 makes the pressing portion that it is moved in left-right direction.A pair of links protrusion 54 is relative to configuration the one of lower end side 5C To fulcrum 53, configure in the upper end side 5D for leaving predetermined distance.That is, become pressing portion link protrusion 54 relative to As the fulcrum 53 of rotating fulcrum, configure in plectane portion 51 in opposite location.Therefore, when being capable of increasing the rotation of push part 5 Link protrusion 54 amount of movement and the open and close valve 6 in conjunction with 54 connecting rod of link protrusion amount of movement.

About compression zone 5A or by the relationship in force section 5B (force) and fulcrum 53 (fulcrum), (effect of link protrusion 54 Point) configuration is relative to fulcrum 53, than compression zone 5A and the position remote by force section 5B.In other words, link protrusion 54 with Between across compression zone 5A and by force section 5B and upper end side 5D that the mode opposite with fulcrum 53 configured in plectane portion 51. It, can be opposite at a distance from them by compression zone 5A or the shifting power augmentation suffered by the 5B of force section by being set as such configuration The amount answered and be applied to link protrusion 54.

Then, illustrate open and close valve 6.Open and close valve 6 is configured in the communication port 43 for being connected to the first Room 41 with second Room 42.And And open and close valve 6 is moved in communication port 43 in left-right direction and being driven in rotational action of the push part 5 around fulcrum 53 It is dynamic, to be opened and closed communication port 43.Due to being driven in the rotational action, the link protrusion 54 of open and close valve 6 and plectane portion 51 Connecting rod combines.

Figure 15 (A) is the perspective view of open and close valve 6, and Figure 15 (B) is the exploded perspective view of open and close valve 6.Figure 16 (A) is Figure 10 (A) XIV-XIV line cross-sectional view, Figure 16 (B) are the enlarged drawings in the portion A1 of Figure 16 (A).Open and close valve 6 is by valve support 61 and by the valve The assembly for the umbrella valve 66 that support 61 is kept is formed.Communication port 43 is through the cylinder type of tank portion substrate 310 and protruding portion 419 Hole, the stage portion 43C of the small diameter portion 43B with large-diameter portion 43A, internal diameter less than large-diameter portion 43A and the diameter difference based on the two.

Valve support 61 is with the first end for being located at 41 side of the first Room (left side) in the state of being assembled in communication port 43 611 and be located at 42 side of second Room (right side) the second end 612 the component in semi-barrel shape.Valve support 61 includes: first end The canister portion 62 of 611 sides；The flat part 63 of 612 side of the second end；Middle part 64 between canister portion 62 and flat part 63；And It is disposed in the link pin 65 of flat part 63.Umbrella valve 66 is maintained at 611 side of first end of valve support 61.

Canister portion 62 is the maximum barrel of outer diameter in valve support 61.Canister portion 62 includes: the outer peripheral surface as canister portion 62 Guide surface 62S；A part of canister portion 62 incision and the flow path notch 621 that is formed in the circumferential；And in canister portion 62 Side is annularly recessed the retention groove 622 of setting.Canister portion 62 is housed in the large-diameter portion 43A of communication port 43, when open and close valve 6 is along a left side When right direction is mobile, guide surface 62S is guided by the inner face of large-diameter portion 43A.Flow path notch 621 is in as open and close valve 6 and opens posture When ink flow flow path.Retention groove 622 is the slot for locking the locking bulb 663 of umbrella valve 66.

Middle part 64 is the barrel that outer diameter is less than canister portion 62.Middle part 64 includes: connecting as with flow path notch 621 Open portion opening portion 641；And the pin receiving portion 642 in the pin portion 662 of receiving umbrella valve 66.64 company of being housed in of middle part The small diameter portion 43B of port 43, outer peripheral surface are also guided by the inner face of small diameter portion 43B.In the boundary portion of canister portion 62 and middle part 64 The cyclic annular abutting part 62A formed in the presence of the step by the outer diameter difference based on the two.The step of cyclic annular abutting part 62A and communication port 43 Portion 43C is opposite and abuts.

Flat part 63 is in the state that open and close valve 6 is assembled in communication port 43 from communication port 43 towards right portion outstanding Point.The plane that flat part 63 has the table back extended in left-right direction a pair of.Link pin 65 is relative to the pair of plane along lead Vertical direction is provided projectingly respectively.The link protrusion 54 that the link pin 65 is embedded in push part 5 as shown in Figure 14 (B) has Tie rod holes 541.By the insertion, push part 5 and open and close valve 6 are combined by connecting rod, can will push against the rotational motion of component 5 It is transformed to the linear motion of open and close valve 6.

Umbrella valve 66 is the article of rubber system, the pin portion 662 and one for having umbrella portion 661, extending to the right from umbrella portion 661 The locking bulb 663 in pin portion 662 is set to body.Umbrella portion 661 has the umbrella of the internal diameter greater than the large-diameter portion 43A of communication port 43 straight Diameter.The peripheral part of the inside (right side side) in umbrella portion 661 is sealing surface 67.Sealing surface 67 passes through the week being connected to as communication port 43 The sealing wall surface 43S of the protrusion end face of the wall surface and protruding portion 419 that enclose, can be set as closed state for communication port 43 and (close appearance Gesture)., whereas if sealing surface 67 leaves sealing wall surface 43S, then the closed state is released from and (opens posture).In addition, umbrella portion If 661 right sides side are applied defined pressure, umbrella shape shape inverts (Figure 29 (A), (B)).

Pin portion 662 is the bar-like portion extended in left-right direction, is the part of the pillar as umbrella portion 661.Pin portion 662 into Enter in the canister portion 62 of valve support 61 and the pin receiving portion 642 of middle part 64.That is, umbrella portion 661 is connected to valve support 61 First end 611, and pin portion 662 it is embeddable in valve support 61 inside canister portion in.Locking bulb 663 is leaning on for pin portion 662 The part of left end is formed with spherical expansion set, and is embedded in the part of retention groove 622.Guarantor is embedded in by locking bulb 663 Slot 622 is held, umbrella valve 66 is kept with the confined state of the movement of left and right directions by valve support 61.That is, umbrella valve 66 and valve support 61 Integrally move in the lateral direction.

Force application spring 45 is between the second face 51B and tank portion substrate 310 in plectane portion 51 and to support (force) second The coil spring of face 51B.Specifically, as shown in Figure 16 (B), the right end side of force application spring 45 is embedded in the bullet in plectane portion 51 Spring mosaic process 511, left end side are housed in the spring base 417 that recess is set to tank portion substrate 310.When the compression in plectane portion 51 Portion 5A by resist force application spring 45 right direction active force left direction displacement force when, plectane portion 51 is around fulcrum 53 Axis and rotate to the left.Not in the case where by the displacement force, using the active force, plectane portion 51 maintains erect posture.

In the following, illustrating the on-off action of open and close valve 6.Figure 16 shows the state for closing posture of open and close valve 6.The state is atmosphere Pressure detection film 7 does not generate the state of the displacement force for the degree for rotating push part 5 (plectane portion 51), that is, force application spring 45 Spring pressure (active force) and second Room 42 internal pressure total state greater than atmospheric pressure.Although second Room 42 is negative pressure, Be, force application spring 45 be greater than the atmospheric pressure generated based on the negative pressure detect film 7 displacement force active force to plectane portion 51 By force section 5B apply towards right power.Therefore, plectane portion 51 is not around straight described in the axis rotation of fulcrum 53 and maintenance Vertical posture.

Appearance is closed positioned at rightmost side at this point, being in open and close valve 6 of the link protrusion 54 in conjunction with 5 connecting rod of push part Gesture.That is, passing through 54 valve of link protrusion support, 61 trailed state to the right in the active force using force application spring 45. Therefore, the cyclic annular abutting part 62A for becoming valve support 61 is connected to the stage portion 43C of communication port 43, also, the sealing surface of umbrella valve 66 67 are connected to the state of sealing wall surface 43S.Communication port 43 is closed by umbrella valve 66 as a result,.It can be said that force application spring 45 is by circle Plate portion 51 applies the power of right, applies the power towards the direction for closing posture indirectly to open and close valve 6.

Figure 17 (A) corresponds to the figure of Figure 16 (A), is to indicate that open and close valve 6 is in the cross-sectional view for opening the state of posture, Figure 17 It (B) is the enlarged drawing in the portion A2 of Figure 17 (A).If ink blowing unit 22 continues the spray of ink droplet from the state of Figure 16 (B) Act out, then as the second Room of confined space 42 with the reduction of ink and vacuum degree is gradually got higher.Soon, if second Room 42 reach more than the negative pressure of defined threshold value, then atmospheric pressure detection film 7 applies the pushing force for resisting the active force of force application spring 45 It is added on the compression zone 5A in plectane portion 51.That is, the internal pressure of spring pressure and second Room 42 in force application spring 45 is total lower than big The state of air pressure.

At this point, plectane portion 51 resists the active force of force application spring 45 and rotates around the axis of fulcrum 53 towards left.Also, By the rotation, the generation of link protrusion 54 makes pushing force PF of the open and close valve 6 towards left, opens the posture changing of open and close valve 6 Posture.That is, pushing force is transferred to the link pin 65 of valve support 61, guide surface 62S from the tie rod holes 541 of link protrusion 54 It is guided by the inner face of communication port 43, also, valve support 61 moves linearly to the left.With the movement, umbrella valve 66 is also to the left Mobile, sealing surface 67 leaves from sealing wall surface 43S.It is formed between sealing surface 67 and sealing wall surface 43S that is, becoming The state of clearance G.Therefore, umbrella valve 66 is released from the closing of communication port 43.

If open and close valve 6, which is in, opens posture, as used in Figure 17 (B) shown in arrow F, the pressure based on atmospheric pressure+ρ gh The pressure difference of first Room 41 and the second Room 42 of vacuum degree progress, ink is flowed into from the first Room 41 to second Room 42.Specifically, Ink is cut by the clearance G of sealing surface 67 and sealing wall surface 43S by umbrella valve 66, the flow path for the canister portion 62 for being set to valve support 61 Mouthfuls 621 and flow path that the opening portion 641 of middle part 64 is formed is set and flows into second Room 42.

If the ink for flowing into second Room 42 increases, the vacuum degree of second Room 42 gradually mitigates.Soon, if force application spring 45 spring pressure and the total of internal pressure of second Room 42 are greater than atmospheric pressure, then the plectane portion 51 using the active force of force application spring 45 It is pushed back towards right.That is, plectane portion 51 is by force application spring 45 if second Room 42 reaches the negative pressure lower than defined threshold value Active force push and around the axis of fulcrum 53 towards right rotate.Accordingly.Open and close valve 6 is also drawn and direction by link protrusion 54 Right linear movement.Soon, the cyclic annular abutting part 62A of valve support 61 is connected to the stage portion 43C of communication port 43, umbrella valve 66 it is close Cover 67 is connected to sealing wall surface 43S.Therefore, open and close valve 6, which reverts to, closes posture.

Using the schematic diagram of Figure 18 (A), (B) illustrate to have more than structure present embodiment negative voltage supply mechanism Function and effect.Figure 18 (A) indicates that push part 5 (plectane portion 51) is in the posture that hangs down, and open and close valve 6 is in the state for closing posture, Figure 18 (B) indicates the inclination attitude that push part 5 rotates, and open and close valve 6 is in the state for opening posture.

Firstly, push part 5 has this rotating fulcrum of fulcrum 53, the support plate being disposed in second Room 42 is utilized 425 by pivotal support.Therefore, if compression zone 5A is by the displacement force of atmospheric pressure detection film 7, push part 5 is around fulcrum 53 Axis rotation.I.e. it is capable to be around fulcrum 53 by this unstable mobile force transformation of displacement of atmospheric pressure detection film 7 The rotation of axis this stable mobile power.Therefore, the displacement force of atmospheric pressure detection film 7 can be made (to push away by link protrusion 54 Splenium) it is efficiently transferred to open and close valve 6.For example, the push part of open and close valve 6 is pasted on the pushings such as atmospheric pressure detection film 7 In the case that component does not have rotating fulcrum, movement becomes unstable, becomes unstable to the transmitting of the pushing force of open and close valve 6. But according to the present embodiment, since push part 5 generates stable pushing force, open and close valve 6 can be made required Opportunity carries out posture changing closing posture and open between posture, steadily can supply ink to head unit 21.

Further, fulcrum 53 is configured in the lower end side 5C of push part 5, and the configuration of link protrusion 54 is relative to branch Leave the upper end side 5D of the push part 5 of predetermined distance in point portion 53.That is, as shown in Figure 18 (A), if the axis of fulcrum 53 Fulcrum is fulcrum P1, and the link protrusion 54 that mobile power is inputted to open and close valve 6 is position P2, then position P2 is in push part 5 Configure the opposite location in fulcrum P1.The force P3 for applying rotatory force to push part 5 is compression zone 5A in the present embodiment And by the allocation position of force section 5B, force P3 is between fulcrum P1 and position P2.

Therefore, it is capable of increasing the amount of movement of the link protrusion 54 when push part 5 rotates, and then is capable of increasing open and close valve 6 Left and right directions linear movement amount.As shown in Figure 18 (B), if atmospheric pressure detection film 7 pushing force be applied to position P2 (by Splenium 5A), axis rotational angle θ 1 of the push part 5 around fulcrum 53.At this point, push part 5 on the position of compression zone 5A Actual amount of movement be d1, but the amount of movement on the position of link protrusion 54 (link pin 65) become than d1 amplify with relative to The amount of movement d2 of the position P2 of fulcrum P1 amount corresponding with the range difference of force P3.

Such as being illustrated using Figure 16 (A) to Figure 17 (B), open and close valve 6 is not relied in the component of pushing force opening and closing communication port 43, But the component of communication port 43 is opened and closed by moving in left-right direction in communication port 43.In addition, the shifting of open and close valve 6 to the left Momentum is bigger, then clearance G also becomes larger and the inflow resistance of ink reduces.When the ink in second Room 42 sharply consumes, from big Air pressure detection film 7 applies big pushing force, and therefore, amount of movement d1 is also bigger.Further, it is possible to amount of movement d1 amplified Amount of movement d2 keeps open and close valve 6 mobile towards left.Therefore, in the case where ink is sharply consumed, make open and close valve 6 significantly It is mobile, comparatively large number of ink can be made to flow into second Room 42.

In contrast, when the ink in second Room 42 is consumed gentlely, from the pushing force of the atmospheric pressure detection application of film 7 Become smaller, thus amount of movement d1 is smaller.Even such small amount of movement d1, is amplified in the position of link protrusion 54 and is become Amount of movement d2 can correspondingly make open and close valve 6 mobile towards left.Therefore, even if in the case where ink is consumed gentlely, Also it can in time allow open and close valve 6 mobile with good sensitivity.It is as a result, when vomiting ink from head unit 21 and a small amount of When spraying ink, it can ensure that from liquid supplying unit 3 to head unit 21 and steadily supply ink.

Further, as other viewpoints the advantages of, it is brought excellent in conjunction with 5 connecting rod of push part can to enumerate open and close valve 6 Point.Specifically, the tie rod holes 541 of the link pin 65 near the right end by being disposed in open and close valve 6 and link protrusion 54 formation Connecting rod combines.Also, force application spring 45, by force section 5B, is applied direction to open and close valve 6 and closes posture by pushing plectane portion 51 Direction power.Therefore, push part 5 (plectane portion 51) is rotated around the axis of fulcrum 53, thus towards left as shown in Figure 18 (B) Square Sloped rotating angle θ 1.But it is combined by the connecting rod, open and close valve 6 will not follow the tilting action in plectane portion 51 and tilt.? That is open and close valve 6 rotates rotation angle θ 2 corresponding with rotation angle θ 1 around link pin 65, it is able to maintain that flat-hand position.Therefore, Open and close valve 6 can be made to move linearly in the lateral direction in communication port 43, open and close valve 6 can be allowed to close posture and opening between posture Steadily act.

[detailed construction of filter chamber]

Then, the structure of filter chamber 44 is described in detail.Figure 19 (A) is the exploded perspective view of filter chamber 44, and Figure 19 (B) is filter chamber 44 cross-sectional view in the front-back direction.As described, filter chamber 44 has the inner wall 441 in the space for defining square tube shape, in the sky It is interior to contain filter element 442, holding member 443 and coil spring 446.

Filter element 442 is filter element of the removal comprising foreign matter in the ink.Foreign matter herein be, for example, hair dust, The agglutination body etc. of ink liquid.In the present embodiment, ink is flowed into from the first Room 41 via the communication port 43 configured with open and close valve 6 Second Room 42.Also, by 6 closed communication mouth 43 of open and close valve, realize the negative pressure movement of the push part 5 in second Room 42.Such as Fruit includes that the ink of foreign matter is provided to such environment, then the negative pressure movement may be hindered.In particular, if foreign matter is stung Into open and close valve 6, then the mobile generation obstacle of the left and right directions of the open and close valve 6, occurs the problem of second Room 42 cannot maintain negative pressure. In addition, if the foreign matter enters the head unit 21 in the downstream side of second Room 42, then it is difficult to remove the foreign matter, and hinder ink Spray action.Filter element 442 is in order to prevent from being configured due to such movement caused by being mixed into of foreign matter is bad in advance.

As filter element 442, as long as the foreign matter can be captured and pass through ink liquid, various filterings can be used Component.For example, woven fabric, nonwoven fabric filter, sponge filter, reticular filter etc. can be used to be used as filter element 442.At this In embodiment, filter element 442 that sheet component when using by overlooking in quadrangle is formed.The size of filter element 442 It is set to the size roughly the same with the sectional dimension of left and right directions of inner wall 441 of filter chamber 44.

Filter chamber 44 has the upstream end 441A of the upstream side in ink feed direction and the downstream 441B in downstream side.In mistake The roof of the upstream end side 441A of filter chamber 44 has been pierced by inflow entrance 44H.It erects to be provided in the surface of inflow entrance 44H and flows into end 447 (Figure 25) of mouth, in the inflow port 447, insertion is connected with the downstream 332 of upstream tube 33.Therefore, it is supplied from print cartridge IC Ink flows into the upstream end side 441A of filter chamber 44 from inflow entrance 44H.Downstream 441B is connected to the upstream as the first Room 41 The inflow part 412 at end.

Filter element 442 is configured in the present embodiment near the 441B of downstream.As described above, foreign matter is bitten into out Valve closing 6 becomes problem, and therefore, filter element 442 is configured in the upstream side of open and close valve 6.That is, the configuration of filter element 442 exists The upstream side of any position in the ink feed channel between print cartridge IC and the first Room 41 or the open and close valve 6 in the first Room 41 Position.According to this configuration, foreign matter is captured before reaching communication port 43 or second Room 42 by filter element 442.Therefore, Can prevent in advance foreign matter bitten into open and close valve 6 or foreign matter from second Room 42 reach head unit 21 the problem of, can not allow because Being mixed into for foreign matter and the movement that liquid supplying unit 3 occurs is bad.

Illustrate the holding structure of filter element 442.As shown in Figure 19 (B), filter element 442 is with 446 quilt of coil spring The mode for being pushed on holding member 443 is kept (fixation).The peripheral part of filter element 442 is fixed in holding member 443.Ink Water captures foreign matter by the middle section in addition to the peripheral part of filter element 442 at this time (referring to the arrow in figure).

Holding member 443 configures near the 441B of downstream in filter chamber 44, comprising: has the flow path as ink Opening 444A frame parts 444；And the cricoid seal member 445 supported by the frame parts 444.Frame parts The molded product of soft resin or rubber etc. can be used in the molded product of 444 usable hard resins, seal member 445.Seal member 445 are embedded in the portions having in the trailing flank of frame parts 444.After filter element 442 is connected to seal member 445 Surface side.The leading flank of frame parts 444 is engaged in the stage portion 441C for being formed in the downstream 441B of inner wall 441.

The peripheral part of filter element 442 is pushed on side behind seal member 445 by coil spring 446.Coil spring 446 It is housed in filter chamber 44 in such a way that coil axis is along ink feed direction (front-rear direction).Specifically, coil spring 446 It is assembled in filter chamber 44 as follows, it may be assumed that upstream end 441A quilt of the rear end 446A of coil spring 446 in inner wall 441 Locking, front end 446B push the peripheral part of filter element 442 towards seal member 445.

According to the structure of the filter chamber 44, the blocking of filter element 442 keeps the frame section of cricoid seal member 445 The opening 444A of part 444.Therefore, the foreign matter in ink can reliably be captured using filter element 442.In addition, without using Bonding agent etc. can also realize the fixation of filter element 442 and holding member 443 using the pushing force of coil spring 446.Liquid supplies When unit 3 being answered to act, filter element 442 is placed in liquid, and the peripheral part as the fixed part to holding member 443 is also dipped in ink In water.The ink is likely to become the solvent of described bonding agent etc..Therefore, if using the fixed filter element 442 such as bonding agent, Filter element 442 can become foreign matter in ink from the dissolution such as the removing of holding member 443 or bonding agent.It is such bad to pass through It is eliminated using the present embodiment of the pushing force of coil spring 446.In addition, by being provided as carrying out the special of the filtering of ink With the filter chamber 44 of room, the assemblability to the filter element 442 of liquid supplying unit 3 can be made good, also, make it reliably Play strainability.

[the exhaust gear portion of second Room]

Illustrate to be attached to second Room in the following, also referring to Figure 20 (A)~Figure 22 (B) other than referring to described Figure 12 (A) 42 exhaust gear portion 37.Figure 20 (A) and (B) are the perspective views of the rod unit 46 as the component parts in exhaust gear portion 37, Figure 20 (C) is the exploded perspective view of rod unit 46.Figure 21 (A) and (B) indicate push part 5, open and close valve 6 and rod unit 46 The perspective view of positional relationship.Figure 22 (A) and (B) are identical section with Figure 16 (A), are for illustrating that the exhaust of rod unit 46 is dynamic The cross-sectional view of work.As described, when exhaust gear portion 37 is used in initial use and after maintenance etc. at the beginning of second Room 42 Phase fill ink when exhaust and by ink generate bubble degassing when etc..

Exhaust gear portion 37 in addition to comprising be provided projectingly the already described protruding portion 426 in the upper end of second Room 42 422 with It outside, also include rod unit 46, sealing ring 46C and retainer 47.As shown in Figure 12 (A), protruding portion 426 is from defining second Room 42 Second the top for defining wall 421 is provided projectingly, and has the opening that second Room 42 is communicated with the atmosphere, i.e. cutting as gas vent Face is circular prominent hole 42A.The uppermost position that second Room 42 is arranged in by that will protrude hole 42A can be carried out reliably The degassing of second Room 42.Protruding portion 426 has the large-diameter portion 426A for the surface for being located at upper end 422 and is continuously disposed in major diameter The small diameter portion 426B of the top of portion 426A.About the internal diameter of prominent hole 42A, large-diameter portion 426A is greater than small diameter portion 426B.

As shown in Figure 20 (C), rod unit 46 is in the shape of spade, has a part and is inserted through the rodlike of prominent hole 42A Component 461 and it is continuously disposed in pressing tablet 464 below.Rod unit 46 be the closing posture for closing prominent hole 42A with A kind of valve member of posture changing is carried out between the opening posture of open prominent hole 42A.In the present embodiment, rod unit 46 The posture changing movement linkage of posture changing movement and the open and close valve 6 by push part 5.Specifically, at rod unit 46 In the state of the closing posture, allows open and close valve 6 to be in described and close posture, be in the open posture in rod unit 46 When state, the posture of open and close valve 6 is made to open posture described in posture changing from described close.

The bar-like member 461 of rod unit 46 is the cylindrical body of the outer diameter with the aperture for being less than prominent hole 42A, has upper end Portion 462 and lower end 463.Upper end 462, which becomes, receives the defeated of the operation pressing force for pressing rod unit 46 downward from user Enter portion.Lower end 463 is connected to pressing tablet 464.As shown in Figure 21 (A), (B), pressing tablet 464 will be as will be applied to upper end 462 operation pressing force is transferred to the transfer part for receiving inclined-plane 55 of push part 5 and plays a role.Summary in lower end 463 Position against the top is equipped in the circumferential with interval protrusion 463A made of the multiple kicks of annular arrangement of bar-like member 461.

Pressing tablet 464 has relative to the inclined pressing inclined-plane 465 of axis of bar-like member 461 and in bottom along front and back The lower ora terminalis 466 that direction extends.Pressing inclined-plane 465 is the inclined-plane that following ora terminalis 466 extends upward for starting point.Pressing Inclined-plane 465 and lower ora terminalis 466 receive when rod unit 46 is by the operation pressing force as with front and back a pair of push part 5 The part that inclined-plane 55 interferes.The front and rear width on pressing inclined-plane 465 is set to be longer than the size at a pair of interval for receiving inclined-plane 55. It is connected to by pressing inclined-plane 465 and lower ora terminalis 466 and receives inclined-plane 55, the operation pressing force is transferred to push part 5, from And push part 5 is rotated around the axis of fulcrum 53 towards left, and the posture of open and close valve 6 is made to open posture from posture changing is closed.

In the upper engaging that the upper end of bar-like member 461 462 is formed about interval in the up-down direction and arranges Slot 467A and lower engaging slot 467B.It is embedded in Upper gasket 46A in upper engaging slot 467A, is embedded in lower gasket 46B in lower engaging slot 467B. In addition, being equipped with seal groove 468 near lower end 463.The outer diameter of lower end 463 is set to be greater than its of bar-like member 461 The outer diameter of his part becomes seal groove 468 between the lower end 463 and interval protrusion 463A.In addition, in bar-like member 461 The range of whole length in the front-back direction be equipped with the exhaust cannelure 461A that is formed by groove.The exhaust cannelure 461A and interval protrusion The circumferential position of the valley of portion 463A is consistent.

Sealing ring 46C and retainer 47 are installed in bar-like member 461.Sealing ring 46C is that have slightly larger than bar-like member 461 Internal diameter O-ring.Sealing ring 46C is enclosed in bar-like member 461, and is embedded in seal groove 468.The outer peripheral surface of sealing ring 46C In the state of being mounted on seal groove 468 with the inner peripheral surface IS sliding contact of the large-diameter portion 426A of protruding portion 426.Retainer 47 is Generally rectangular plate component has the rotation hole 47H that bar-like member 461 is inserted through.The installation site of retainer 47 is upper end It is between upper engaging slot 467A and lower engaging slot 467B near portion 462.Upper lower gasket 46A, 46B clamp retainer 47, with limitation The mode of the axial movement of the retainer 47 is respectively embedded into upper and lower engaging slot 467A, 467B.

Retainer 47 can rotate in the state of being clamped by upper lower gasket 46A, 46B around the axis of bar-like member 461.Retainer 47 correspond to moving up and down for rod unit 46, make a reservation for keep frame 427 a pair of of engagement pawl 428 upper surface 428A or under The component that surface 428B (Figure 22) is abutted.When described move up and down, retainer 47 becomes the side of left and right directions with length direction Formula rotation, and pass through the gap of a pair of of engagement pawl 428.Pin hole 471 and engaging portion 472 are formed in retainer 47.At least when When retainer 47 is connected to upper surface 428A, as shown in Figure 12 (A), the pin member 48 for the pin-type that is open is embedded in pin hole 471 and card Only recess portion 472 prevent the rotation and disengaging of retainer 47, that is to say, that realize the fixation of retainer 47.Retainer 47, pin portion Part 48 and a pair of of engagement pawl 428 as the posture of fixation rod unit 46 fixed mechanism and play a role.

Then illustrate the movement of rod unit 46.Figure 22 (A) is the cross-sectional view for indicating the state before the movement of rod unit 46, Figure 22 It (B) is the cross-sectional view for indicating to execute the state of the exhaust of second Room 42 by the movement of rod unit 46.Figure 22 (A) indicates bar portion The upper end 462 of part 46 does not receive to operate the state of pressing force, that is, indicates that rod unit 46 closes the closing appearance of prominent hole 42A Gesture.On the other hand, Figure 22 (B) indicates that upper end 462 is pressed downward and is applied the state of operation pressing force, that is, Indicate the opening posture of the open prominent hole 42A of rod unit 46.

Pin member 48 in the state of the upper surface 428A that posture is closed by being connected to engagement pawl 428 in retainer 47 It fixes the two and is formed.It is fixed by this, rod unit 46 is in the state being raised upward.The state forms bar-like member 461 interval protrusion 463A and lower end 463 are housed in the state in the large-diameter portion 426A of protruding portion 426.Namely It says, is the state that the outer peripheral surface of sealing ring 46C is connected to the inner peripheral surface IS of large-diameter portion 426A.Therefore, prominent hole 42A, which is in, is sealed The state closed.The pressing tablet 464 (pressing inclined-plane 465 and lower ora terminalis 466) of rod unit 46 is oblique in the receiving for leaving push part 5 The state in face 55 does not apply any power to push part 5.Therefore, posture is closed in the maintenance of open and close valve 6.

On the other hand, if rod unit 46 receives the decline of operation pressing force and is in the open posture, interval protrusion Portion 463A and lower end 463 also decline, and are accompanied by this, and sealing ring 46C leaves from inner peripheral surface IS.Accordingly, by interval protrusion The air duct that the valley of 463A and the exhaust cannelure 461A of bar-like member 461 are formed is in the space in second Room 42 to be connected to State.That is, prominent hole 42A becomes the state being opened, become the state that second Room 42 is connected to outer gas.Therefore, The air for being trapped in second Room 42 can be passed through state of the prominent hole 42A to outside discharge by being formed.

In addition, if rod unit 46 is in the open posture, then operates pressing force and be passed to push part 5.Such as figure Shown in 22 (B), presses inclined-plane 465 and the pressing of lower ora terminalis 466 receives inclined-plane 55.If receiving inclined-plane 55 to be pressed, pressing portion Part 5 (plectane portion 51) is rotated around the axis of fulcrum 53 towards left.As described, if push part 5 is rotated towards left, Open and close valve 6 is pushed towards left by link protrusion 54, the posture of open and close valve 6 is made to open posture from posture changing is closed.Accordingly, even The closing of port 43 is released from, and the first Room 41 becomes the state being connected to second Room 42.

The open posture is formed by the lower surface 428B that retainer 47 is pushed up to engagement pawl 428.That is, described when taking When open posture, retainer 47 is pressed, and becomes the state for slipping into the lower section of engagement pawl 428.Then, pass through pressing tablet 464 Receive the pressing on inclined-plane 55, resist the active force of force application spring 45 and push part 5 rotates, therefore, pressing tablet 464, which is applied, to be applied The active force of power spring 45.That is, acting on the active force lifted upward in rod unit 46.By the active force, only The lower surface 428B of engagement pawl 428 is arrived on the top of moving part 47, maintains the open posture.

As a result, if rod unit 46 is in the open posture, becoming ensures that the entrance of the fluid to second Room 42 (connects Port 43) and fluid outlet (prominent hole 42A) state.Therefore, initial in use, can be on one side by the sky of second Room 42 Gas is smoothly performed through communication port 43 from prominent hole 42A discharge, the supply of one side utilized head difference from the first Room 41 to second Room The filling of 42 ink acts.In addition, by ink generate bubble etc. and (due to the in the increased situation of air capacity of second Room 42 Therefore ink level decline in two Room 42 can be confirmed with monitoring pipe 36), by the way that rod unit 46 is set as the opening Posture can easily be done the exhaust of second Room 42.

In said embodiment, using have from atmospheric pressure detection film 7 receive displacement force compression zone 5A and using by Displacement force suffered by splenium 5A pushes the push part 5 of the link protrusion 54 of open and close valve 6, is in the opening with rod unit 46 The movement of posture links, and the posture changing of open and close valve 6 is made to open posture.That is, be by the once-through operation of rod unit 46, It can ensure the entrance to the fluid of second Room 42 and the structure of outlet.Therefore, user can be easily performed second Room 42 Exhaust event.Further, since exhaust gear portion 37 configures in the upper surface of tank portion 31, therefore, as shown in figure 4, in multiple liquid Supply unit 3 is equipped in the state of bracket 2, and user can also carry out from the front side contacts of bracket 2 to each liquid supplying unit 3 exhaust event.

[program of exhaust event]

Then, the exhaust event example in exhaust gear portion 37 is illustrated based on Figure 23 (A)~Figure 24 (B).Figure 23 (A) is corresponded to The perspective view in the exhaust gear portion 37 of the state of Figure 22 (A), Figure 23 (B) and Figure 24 (A) be indicate rod unit 46 operation it is vertical Body figure, Figure 24 (B) correspond to the perspective view in the exhaust gear portion 37 of the state of Figure 22 (B).

Figure 22 (A), Figure 23 (A) closing posture under, as described above, being connected to the upper of engagement pawl 428 in retainer 47 It is fixed both in the state of the 428A of surface with pin member 48.Retainer 47 is by its length direction towards quilt in a manner of in the front-back direction Rotation, front end side are overlapped in the engagement pawl 428 of front side, and rear end side is overlapped in the engagement pawl 428 of rear side.The pin of retainer 47 Hole 471 and engaging portion 472 are rotated by described positioned at front end side.Engagement pawl 428 in front side is corresponding to pin hole 471 Position be equipped with notch.The vertical portion 481 of the pin member 48 for the pin-type that is open is inserted through pin hole 471, and lower end side is towards outer lateral bending Bent holding section 482 is embedded in engaging portion 472, so that retainer 47 is fixed on engagement pawl 428.In this state, rod unit 46 are connected to the inner peripheral surface IS of prominent hole 42A and play sealing effect in the state suspended in midair upward, sealing ring 46C, and And pressing inclined-plane 465 is separated with inclined-plane 55 is received.

When carrying out the exhaust event of second Room 42, as shown in Figure 23 (B), firstly, operating personnel extracts from retainer 47 Pin member 48.Accordingly, retainer 47 is in the state that can be rotated around the axis of bar-like member 461.Then, operating personnel such as Figure 24 (A) retainer 47 is allowed to rotate 90 ° in such a way that its length direction is towards left and right directions shown in.By the rotation, at retainer 47 State in the gap that can pass through front and back a pair of engagement pawl 428 along the vertical direction, in this state, operating personnel presses upper end 462, depress rod unit 46.The pressure carries out to the upper surface of retainer 47 reaching the lower section of the lower surface 428B of engagement pawl 428 Until.

Thereafter, as shown in Figure 24 (B), operating personnel turns retainer 47 towards in a manner of in the front-back direction by its length direction It is 90 ° dynamic.Accordingly, the front end side of retainer 47 is overlapped under the engagement pawl 428 of front side, and rear end side is overlapped in the engagement pawl of rear side Under 428.In this state, as shown in Figure 22 (B), rod unit 46 is in the state being pressed downward, becomes sealing ring 46C leaves and the opening posture of sealing effect disappearance from the inner peripheral surface IS of prominent hole 42A.Moreover, being applied to the behaviour of upper end 462 Make pressing force and be transmitted to from pressing tablet 464 to receive inclined-plane 55, resists the active force of force application spring 45 and push part 5 is allowed to rotate. Using the repulsive force of force application spring 45 at this time, the lower surface 428B of engagement pawl 428 is arrived on the top of retainer 47, to form open appearance The stationary state of the rod unit 46 of gesture.

In this way, can also utilize 428 letter of engagement pawl even if rod unit 46 is in the free position of closing posture or open posture Singly maintain these postures.For example, in the early stage use when liquid is filled in second Room 42 in the case where, due to need this second The exhaust of room 42, therefore, it is necessary to rod unit 46 is maintained open posture.At this point, as long as operating personnel carries out pressing rod unit 46 upper end 462, also, make retainer 47 slip into engagement pawl 428 lower surface 428B operation.Therefore, the work Industry personnel are not not necessarily to persistently press upper end 462, can be improved its operability.In addition, usually used in liquid supplying unit 3 When, it needs for rod unit 46 to be set as to close posture.At this point, retainer 47 is made to be overlapped in the upper surface 428A of engagement pawl 428, and It is fixed with pin member 48, it just can be carried out with shirtsleeve operation.

[countercurrently preventing mechanism part]

In the following, explanation in the pressurization cleaning module that execution is illustrated based on Fig. 9 (A), prevents the inks pressurized by pump 9 The structure of mechanism part 38 is prevented to the adverse current of 42 adverse current of second Room.Figure 25 is the liquid that the section of mechanism part 38 is prevented comprising adverse current The cross-sectional view in the front-back direction of supply unit 3, Figure 26 are the exploded perspective views that adverse current prevents mechanism part 38, and Figure 27 (A)~(C) is Adverse current prevents the perspective view of mechanism part 38.Figure 28 (A) and (B) are the enlarged drawings of the part A3 of Figure 25, and Figure 28 (A) indicates impression block Adverse current under formula prevents the cross-sectional view of the state of mechanism part 38, and Figure 28 (B) is that the adverse current pressurizeed under cleaning module prevents mechanism part The cross-sectional view of 38 state.

It includes valve pipeline 81, branch head 82, sphere 83, seal member 84, coil spring 85 that adverse current, which prevents mechanism part 38, And O-ring 86.Valve pipeline 81 is the component with 423 one of lower end of second Room 42, and other elements are assembled in valve pipeline 81. Figure 27 (A) and (B) are the perspective views that adverse current in addition to valve pipeline 81 prevents mechanism part 38, and Figure 27 (C) is branch head 82 Perspective view when observing from below.

Valve pipeline 81 is that (liquid sprays from the supply orifice 42H being pierced by the lower end of second Room 42 423 (lowest end) Mouthful) towards the pipeline extended below vertical, it is to define the integrated part of wall 421 with second.Valve pipeline 81 is used for the company of offer The ink flow path of second Room 42 and downstream tube 34 is connect, is constituted from the ink feed channel of the arrival ink blowing unit 22 of second Room 42 A part.In order to engage branch head 82, it has been provided projectingly hooking sheet 811 in the outer peripheral surface of valve pipeline 81, it is prominent in inner peripheral surface It is provided with chimeric circular protrusion 812.

Branch head 82 is to form the component based on Fig. 7 to Fig. 9 fluidic junction a above-mentioned.Branch head 82 enters comprising first Mouth port 821, second entrance port 822, outlet port 823, housing section 824, locking window 825, notch 826 and chimeric pawl 827.First entrance port 821 is the port for being connected to second Room 42, in the present embodiment, is connected to via valve pipeline 81 Two Room 42.Second entrance port 822 is the connected port in downstream of shunt valve 32P (bypass downstream tube BP2).Outlet port 823 be the connected port in upstream end 341 of downstream tube 34.

A pair of of circular arc that housing section 824 is opposite mutually by the outside in first entrance port 821 downward and configures Piece is formed.Valve pipeline 81 enters the gap between a pair of shells portion 824 and first entrance port 821.Locking window 825 is that setting exists The opening in a pair of shells portion 824 is the opening that the hooking sheet 811 of valve pipeline 81 engages.Notch 826 is the first entrance of tubular The part of a part of incision of the peripheral wall of port 821, is for ensuring that the part of the flow path of ink.Chimeric pawl 827 is from the The chimeric ring-type of the part in hook shape that the upper end of one ingress port 821 is provided projectingly upward, engaging valve pipeline 81 is prominent Play 812.That is, branch head 82 passes through hooking sheet 811 in the inner circumferential of valve pipeline 81 and engages the engaging of window 825, outside Week by the engaging of chimeric circular protrusion 812 and chimeric pawl 827, is fixed in valve pipeline 81.The upper end of first entrance port 821 Edge 828 becomes the ball-joint socket part for accepting aftermentioned sphere 83.

Sphere 83 is housed in valve pipeline 81 in a manner of it can move to ink feed direction, plays the effect of valve.Ball The outer diameter of body 83 is less than the internal diameter of valve pipeline 81, and is less than the internal diameter of coil spring 85.As the material for forming sphere 83, can make With a variety of materials, but it is preferable to use the specific gravity relative to ink, and there is the material of 2 times of specific gravity below to be formed, and particularly preferably uses The material for the range that specific gravity relative to ink is 1.1 times to 1.5 times is formed.If it is the material of the range, the ratio of sphere 83 Therefore the great specific gravity in ink makes sphere 83 be easy decline using self weight, also, become sphere 83 in valve pipeline 81 Therefore the relationship of specific gravity close to the specific gravity of ink can promptly carry out the sphere 83 in the valve pipeline 81 when pressurization is removed Rise.

In general, the ink for being used in ink-jet printer is water-soluble liquid, specific gravity=1 or with the ratio near it Weight.Therefore, the material as sphere 83 preferably selects the material of specific gravity < 2.In addition, the material is preferably provided with even if always Be contacted with ink will not aging resistance to chemical reagents, the property of abrasion performance.According to these viewpoints, as the material of sphere 83, Particularly preferably use polyacetalsPolybutylene terephthalatePolyvinyl chloridePolyethylene terephthalate

Seal member 84 is sealing element in a curved state, such as shown in Figure 28 (A) and (B), seal member 84 is in sphere 83 top portions 813 of the seat in the upper end side that valve pipeline 81 is arranged in.The ring internal diameter (through hole) of seal member 84 is set It is set to the outer diameter less than sphere 83.As shown in Figure 28 (A), when sphere 83 leaves downward from seal member 84, valve pipeline 81 open.On the other hand, as shown in Figure 28 (B), when sphere 83 is connected to seal member 84, valve pipeline 81 is closed.

Coil spring 85 is that seal member 84 is connected to its lower end, and what upper end was connected to branch head 82 first enters The mode of the lower ora terminalis 828 of mouth port 821 is mounted on the compressed spring in valve pipeline 81.Coil spring 85 is applied to seal member 84 Add the power towards portions 813, accordingly, seal member 84 is crimped on portions 813 always.In addition, in the inside of coil spring 85 Sphere 83 is contained, coil spring 85 also plays the effect of the movement of guidance sphere 83 to ink feed direction.Therefore, valve pipeline The travelling of sphere 83 in 81 is limited, and can make to set up by the abutting of the sphere 83 relative to seal member 84 or leave and Valve arrangement stablize.

The docking section of O-ring 86 sealing valve pipeline 81 and branch head 82.O-ring 86 is embedded in first entrance port 821 Outer peripheral surface, and be connected to first entrance port 821 is provided projectingly base portion 829.

The pump 9 for being housed in pumping section 32 is shown in Figure 25.Pump 9 is configured in shunt valve 32P, flows in shunt valve 32P Dynamic ink pressurizes.Pump 9 is the tube pump for having eccentric cam 91 and extruded tube 92.It is inserted in the axis hole 91A of eccentric cam 91 The camshaft 93 (Fig. 4) of the logical rotation axis as the eccentric cam 91.It is assigned from the driving gear that figure omits to the eccentric cam 91 Rotary driving force.Extruded tube 92 is configured in the circumferential surface of eccentric cam 91, by eccentric cam 91 around the rotation of camshaft 93 It is extruded, the liquid (ink) in pipe is sent out from one end towards another side.In the present embodiment, extruded tube 92 be with The pipe of shunt valve 32P one.That is, the one end of extruded tube 92 becomes the bypass for being connected to the bypass room 413 of the first Room 41 Upstream tube BP1, another side become the bypass downstream tube BP2 for being connected to the second entrance port 822 on branch head 82, central portion Configuration is divided into the press section of the circumferential surface of eccentric cam 91.

As described, it pumps and is in halted state under 9 printing models shown in Fig. 7.It is squeezed at this point, eccentric cam 91 flattens Pipe 92 and be therefore closed by the ink feed channel of shunt valve 32P in halted state.On the other hand, shown in Fig. 8 Circulation pattern and Fig. 9 (A) shown under pressurization cleaning module, pump 9 is driven forward.In Figure 25, eccentric cam 91 is just Turn direction as counterclockwise.By the forward drive of such pump 9, ink is inhaled from the first Room 41 by bypassing upstream tube BP1 Draw, and prevents mechanism part 38 from bypass downstream tube BP2 towards the adverse current as fluidic junction a.In addition, if pump 9 is inverted driving, Then as shown in Fig. 9 (B), by shunt valve 32P and branch head 82,34 negative pressure of second Room 42 and downstream tube.

Then, illustrate that adverse current prevents the movement of mechanism part 38.Under printing model (first state), ink is from second Room 42 Mechanism part 38 and the supply path of downstream tube 34 is prevented to be supplied to head unit 21 using by adverse current.In such printing model Under, as shown in Figure 28 (A), sphere 83 leaves downward from seal member 84, in the upper edge 828 for falling in branch head 82 The state of (ball-joint socket part).This is because the specific gravity of sphere 83 is greater than the specific gravity of ink, sphere 83 utilizes self weight decline.Moreover, Negative pressure, the ink blowing unit 22 of head unit 21 are maintained under printing model from second Room 42 to the supply path of downstream tube 34 Whenever spraying ink droplet, attract the ink being present in the supply path, these also contribute to that sphere 83 is maintained to fall in upper end The state of edge 828.

The state left due to becoming sphere 83 from seal member 84, supply orifice 42H becomes the state being opened. Further, since the upper edge 828 in the first entrance port 821 that sphere 83 is fallen has notch 826, thereby it is ensured that ink Channel.Therefore, the ink in second Room 42 is as shown in arrow F1 in figure, can pass through branch head 82 from second Room 42 and court Downward play pipe 34.

Figure 28 (B) be indicate pressurization cleaning module (the second state) under adverse current prevent mechanism part 38 state section view Figure.Under the cleaning module that pressurizes, using the forward drive of pump 9, branch's head is supplied to by the ink that shunt valve 32P is pressurized (the fluidic junction a) of second entrance port 822 in portion 82.Therefore, shunt valve 32P and the downstream tube 34 positioned at the downstream side of fluidic junction a Inside there is pressurized ink.At this point, ink is pressurised into the high pressure more than 100kPa.If such high pressure is applied in Second Room 42 then defines the installation that the atmospheric pressure detection film 7 of a part of second Room 42 ruptures or defines wall 421 to second sometimes Portion's removing.

But in the present embodiment, using the plus-pressure for being applied to fluidic junction a, sphere 83 is with rising (to ink feed The upstream side in direction is mobile) mode be pushed, sphere 83 is connected to seal member 84.That is, by the pushing, sphere 83 at For the state floated upwards, and it is embedded in the ring of seal member 84.It is connected to by sphere 83 and utilizes 85 quilt of coil spring The seal member 84 of portions 813 is pressed to, supply orifice 42H becomes blocked state.That is, the ink feed path under printing model In, it is interdicted positioned at the ink feed path of the upstream side of fluidic junction a and second Room 42 from the pressurization of pressurized ink.Therefore, energy Enough breakages etc. for preventing atmospheric pressure detection film 7 in advance.

In addition, in the present embodiment, also having the advantages that be difficult to supply to head unit 21 to wrap aeriferous ink.It dissolves in Air in ink and while filling ink liquid to liquid supplying unit 3 mixed air with comprising state in the ink into Enter head unit 21, the air is difficult to be discharged if into respective channel 26 and shared pathway 27 (Fig. 6 (A)), adds even if executing Pressure is removed and can not be excluded sometimes.At this point, the ejection from the ink of ink squit hole 22H is interrupted.But in present embodiment In, second Room 42 is configured in order from above towards lower section, countercurrently prevents mechanism part 38 and downstream tube 34.Therefore, from being stored in Air that the ink of second Room 42 generates or the air being mixed into second Room 42 will not adverse current downward prevent mechanism part 38 And downstream tube 34.Therefore, can not allow makes to wrap aeriferous ink towards head unit 21, can prevent the spray of head unit 21 in advance Portion is measured out.

In addition, the floating upper effect of bubble can be also utilized, from vertical portion even if air is mixed into branch head 82 or downstream tube 34 The air is discharged in second Room 42 by 82A by valve pipeline 81, supply orifice 42H.In addition, the air can utilize air exhauster Structure portion 37 is discharged from second Room 42.Therefore, the air can not be allowed excessively to occupy the volume in second Room 42.

[utilizing the duplicate protection mechanism of umbrella valve]

As described above, in the present embodiment, preventing mechanism part 38 by the way that adverse current is arranged, preventing under the cleaning module that pressurizes Pressurized ink is to the adverse current of second Room 42.But because countercurrently prevent mechanism part 38 certain is bad, such as the movement of sphere 83 It is bad, it may occur however that plus-pressure acts on the case where second Room 42.Given this point has dual guarantor in the present embodiment The mechanism for protecting mechanism, open and close valve 6 being allowed to release stress.That is, open and close valve 6 has pressure release mechanism, the pressure machine for releasing This pressure dependence that structure second Room 42 when normal is negative pressure and the first Room 41 is atmospheric pressure+ρ gh second Room 42 in turn Pressure be higher than the first Room 41 in the case where, released stress from second Room 42 towards the first Room 41.

Be responsible for the pressure release mechanism is the umbrella valve 66 of open and close valve 6.Such as illustrated based on Figure 16 (A) to Figure 17 (B), In the case where second Room 42 is the negative pressure lower than defined threshold value, sealing surface 67 is connected to sealing wall surface 43S and seals umbrella valve 66 Close communication port 43.Accordingly, ink is forbidden to flow into second Room 42 from the first Room 41.On the other hand, if second Room 42 reaches more than The negative pressure of defined threshold value, then umbrella valve 66 and the valve support 61 in conjunction with 5 connecting rod of push part are together towards left movement, sealing It is left and open communication mouth 43 (releasing closing) from sealing wall surface 43S in face 67.Accordingly, ink is allowed to flow into second from the first Room 41 Room 42.

In addition to this, the pressure of pressurized ink of the umbrella valve 66 when because of pressurization cleaning module is applied to the reasons such as second Room 42 And the pressure dependence of second Room 42 and the first Room 41 in turn in the case where, with 66 monomer open communication mouth 43 of umbrella valve.Namely It says, do not assisted by the pushing of push part 5, umbrella valve 66 releases the closed state of communication port 43, by the pressure of second Room 42 to the The release of one Room 41.That is, the umbrella portion 661 (sealing surface 67) of umbrella valve 66 is if its right side side is applied defined pressure, umbrella shape Shape reversion.

Figure 29 (A) is the cross-sectional view for indicating the state of 66 closed communication mouth 43 of umbrella valve, and Figure 29 (B) is to indicate that umbrella valve 66 is open The cross-sectional view of the state of communication port 43.The state for Figure 16 (B) that the state of Figure 29 (A) illustrates before being equal to.Umbrella portion 661 has court The umbrella shape shape protruded to the left.In addition, valve support 61 is located at rightmost using the active force of force application spring 45, ring-type is abutted Portion 62A is connected to the stage portion 43C of communication port 43.Therefore, sealing surface 67 is in the state for being connected to sealing wall surface 43S.

The state of Figure 29 (B) indicates that the umbrella shape shape in the umbrella portion 661 of umbrella valve 66 is anti-because of the pressure applied from 42 side of second Room The state turned.That is, umbrella portion 661 is deformed into the umbrella shape shape protruded towards right.Pressure of the inverted status in second Room 42 Power than the high specified value in the first Room 41 in the case where formed.In the present embodiment, it is contemplated that because pressurizeing removing, high positive pressure applies In second Room 42, as a result the case where the pressure of first Room 41 of the pressure of second Room 42 higher than atmospheric pressure+ρ gh.The specified value Reversal pressure depending on umbrella portion 661.The reversal pressure is set below the rupture strength or atmospheric pressure of atmospheric pressure detection film 7 The value for the installation strength that detection film 7 defines wall 421 to second.

In the case where second Room 42 is pressurized, push part 5 will not be rotated towards left.That is, push part 5 The pushing force for pushing open and close valve 6 towards left is not generated.This is because atmospheric pressure detects film 7 because of the high-pressure trend of second Room 42 And shifted to the side expanded towards right, displacement force will not be assigned to compression zone 5A.Therefore, the effect of force application spring 45 is utilized Power, valve support 61 maintain the state for being located at rightmost.

But even if valve support 61 is not moved, inverted also by the umbrella shape shape in umbrella portion 661, sealing surface 67 is from sealing wall surface 43S leaves, and generates clearance G between the two.Therefore, communication port 43 is in the state being opened.Accordingly, the pressurization in second Room 42 Ink (pressure) is discharged to and (is discharged into) 41 side of the first Room by communication port 43.Therefore, excessive power can not be allowed to act on greatly Air pressure detects film 7 itself or its mounting portion, can prevent breakage.

[flowing of the ink under each mode]

Then, illustrate the flowing of the ink under each mode of liquid supplying unit 3.Figure 30 is the ink indicated under printing model The perspective view of the flowing of water, Figure 31 are the perspective views for indicating the flowing of the ink under pressurization cleaning module, and Figure 32 is to indicate to recycle The perspective view of the flowing of ink under mode.

At printing model (Figure 30), the circulation of the ink without using foldback pipe 35, therefore, using clip 35V Foldback pipe 35 becomes closed state.Certainly, supply valve 33V (Fig. 5) is in open state.The ink such as Figure 30 sprayed from print cartridge IC Arrow F11 shown in, utilized head difference by upstream tube 33 enter filter chamber 44.Pass through filter element 442 in the filter chamber 44 When, it is removed comprising solid foreign matter in the ink.Thereafter the first Room 41 is entered.

If the movement open and close valve 6 by push part 5 is opened, as shown in arrow F12, ink is logical from the first Room 41 It crosses communication port 43 and is stored to second Room 42.Pass through the ink spray action in ink blowing unit 22, the ink quilt of second Room 42 Attract, and passes sequentially through supply orifice 42H, countercurrently prevents mechanism part 38 and enter downstream tube 34.Thereafter, as shown in arrow F13, ink Water enters the shared pathway 27 (Fig. 6 (A)) of head unit 21 via end pipe 24.Then, ink passes through respective channel 26 from each ink Squit hole 22H sprays (arrow F14).

It is pressurizeing under cleaning module (Figure 31), also without using the circulation of the ink of foldback pipe 35 therefore to utilize clip 35V and foldback pipe 35 become closed state.Supply valve 33V is in open state.Under the pressurization cleaning module, pump 9 is rotated forward Operating, ink are forcibly supplied to head unit 21 not against head difference.If 9 movement of pump, as shown in arrow F21, ink Water enters filter chamber 44 by upstream tube 33, enters further into the first Room 41.Then, as shown in arrow F22, ink not towards Second Room 42 and via bypass room 413 and enter bypass upstream tube BP1.

Ink is acted by high-pressure trend by the extruding of pump 9 and is transported to downstream side.That is, as shown in arrow F23, ink It is sent out from the downward play pipe 34 of bypass downstream tube BP2.As described above, the fluidic junction a tool of the downward play pipe 34 in bypass downstream tube BP2 Standby adverse current prevents mechanism part 38, and therefore, ink will not countercurrently arrive 42 side of second Room.Thereafter, as shown in arrow F24, ink via End pipe 24 enters the shared pathway 27 (Fig. 6 (A)) of head unit 21.Then, by respective channel 26, ink is from each ink squit hole 22H is ejected (arrow F25) with high pressure.Accordingly, removal blocks the foreign matter of ink squit hole 22H or is trapped in respective channel 26 Air etc..

At circulation pattern (Figure 32), the circulation of the ink using foldback pipe 35 is carried out, therefore, the closing shape of clip 35V State is released from, and foldback pipe 35 becomes open state.On the other hand, due to allow ink liquid supplying unit 3 and head unit 21 it Between recycle, therefore, supply valve 33V (Fig. 5) is in close state.Accordingly, it is formed by shunt valve 32P, downstream tube 34, head unit 21 Shared pathway 27, the closed ink circulation path that constitutes of foldback pipe 35, foldback communication chamber 414 and bypass room 413.? Under the circulation pattern, such as illustrated based on Fig. 8, pump 9 is also rotated forward and operated.

If 9 operating of pump, the circulation of the ink in the ink circulation path start.That is, by the movement of pump 9, ink Water is introduced in bypass upstream tube BP1 from bypass room 413 as shown in arrow F31 and then as shown in arrow F32, passes out to Bypass downstream tube BP2.Thereafter, ink flows into head unit 21 (arrow F33) via fluidic junction a, downstream tube 34 and end pipe 24, passes through Shared pathway 27 and entrance recovery tube 25 (arrow F34) in the head unit 21.Then, as shown in arrow F35, ink is from recycling Pipe 25 successively via foldback pipe 35, foldback communication chamber 414, fluidic junction b and return to bypass room 413.At this point, due to supply Valve 33V is closed, and therefore, attracts the foldback pipe 35 of ink and shared pathway 27 to become negative pressure by pump 9.Therefore, when ink circulation, no It can be from ink squit hole 22H leak ink.

If executing circulation pattern, ink circulation can be made in ink circulation path as described above.In other words, may be used The ink for being once transported to 21 side of head unit is returned to 3 side of liquid supplying unit using foldback pipe 35.Therefore, though comprising The ink of air is admitted to etc. and air enters 21 side of head unit, can also be recycled the air together with ink by the circulation To 3 side of liquid supplying unit.The air (bubble) for being recycled to 3 side of liquid supplying unit utilizes floating upper power from foldback communication chamber 414 enter the first Room 41 of top, mobile from communication port 43 of the configuration near the top of the first Room 41 to second Room 42.Make Industry personnel confirm the Retention of the air in second Room 42 with monitoring pipe 36 on one side, in time allow exhaust gear portion 37 dynamic on one side Make, so that the air is discharged to the outside from second Room 42.

As described above, by execute circulation pattern, can not allow air trapping head unit 21 respective channel 26 and Near ink squit hole 22H.Air into 21 side of head unit can also pass through pressurization cleaning module removal.But once into Air in head unit 21 is difficult to be discharged, it is sometimes desirable to execute the pressurization removing for spraying considerable amount of ink.Accordingly, there exist be only The problem of being vented from head unit 21 and consuming a large amount of ink.But according to circulation pattern, supply that ink circulation to liquid Therefore ink will not be consumed by answering unit 3 to recycle air.Moreover, making ink in the ink circulation path under circulation pattern Circulation does not need to make ink high-pressure trend as pressurization cleaning module, therefore, pumps 9 low-speed runnings with regard to enough.Therefore, energy It enough avoids big pressure load from being applied to liquid supplying unit 3, atmospheric pressure detection film 7 and close membrane 7A can be prevented damaged.

[liquid ejecting head of second embodiment]

Then, involved by the second embodiment for illustrating the structure for having different from liquid supplying unit 3 described above Liquid supplying unit 3A.Figure 33 (A) is the front view of liquid supplying unit 3A, and Figure 33 (B) is its side view, and Figure 33 (C) is Its top view.Figure 34 is the perspective view for indicating the internal structure of 241 side of the first Room of liquid supplying unit 3A, and Figure 35 is to indicate The perspective view of the internal structure of two Room, 242 side.Figure 36 (A) is that the decomposition of the liquid supplying unit 3A from 242 side of second Room is vertical Body figure, Figure 36 (B) are the exploded perspective views of the liquid supplying unit 3A from 241 side of the first Room.Figure 37 is prevented with adverse current The perspective view of the main part 230 of the exploded perspective view of mechanism part 238.

Liquid supplying unit 3A includes the main part 230 with tank portion 231 and pumping section 232, upstream tube 233, downstream tube 234, shunt valve 235, exhaust gear portion 237, countercurrently prevent mechanism part 238, push part 50, open and close valve 6 and atmospheric pressure inspection Survey film 70.In addition, liquid supplying unit 3A includes: the monitoring pipe 236 for monitoring the ink level of second Room 242；Make pumping section The 232 liaison tube 232P being connected to the first Room 241；And constitute the close membrane for defining a part of wall surface of the first Room 241 70A。

Main part 230 has the base substrate 300 formed by the plate extended along the longitudinal direction.Before base substrate 300 Square side is the tank portion substrate 310 (wall portion) of the substrate as tank portion 231, and rear side is to form the pump of shell structure in pumping section 232 Portion's shell 320.In tank portion, the left side side of substrate 310 is configured with the first Room 241 (upstream chamber), is configured with second Room in right side side 242 (pressure chambers).In tank portion, substrate 310 is pierced by the communication port 243 for being connected to the first Room 241 with second Room 242.In the connection 243 configuration open and close valves 6 same as the first embodiment of mouth.

When substantially overlooking, the first Room 241 is in the shape of L font.It is dashed forward to the left from tank portion substrate 310 the first Room 241 First be arranged out defines wall 2411 and defines.The inflow entrance of ink is pierced by the wall that first defines the topmost in wall 2411 2412.Corresponding to the inflow entrance 2412 of ink, it is provided in the lateral surface setting that first defines wall 2411 and is formed by adaptor plug Inflow port 2417 (Figure 37).The downstream 332 of connection upstream tube 233 is inserted into the inflow port 2417.That is, stream Entrance 2412 is the opening for being connected to print cartridge IC with the first Room 241, and ink flows into the from 2412 utilized head of inflow entrance difference In one Room 241.

First bottom wall part 2413 for defining wall 2411 is located at the lower end of tank portion substrate 310.Close to the of bottom wall part 2413 One rear wall for defining wall 2411, which is equipped with, removes port 2414.The upstream end of liaison tube 232P is connected to the removing port 2414. The spring base 2415 formed by cylindric cavity is provided projectingly near the center of the up and down direction of the first Room 241.Spring Seat 2415 is the cavity for accommodating force application spring 245, to 242 side opening of second Room.

Communication port 243 is located at the top of spring base 2415 in the first Room 241.To the first Room 241 without reduced pressure treatment Deng the first Room 241 is the room for being also applied the pressure P=ρ gh based on head difference other than atmospheric pressure.If ink is from inflow Mouth 2412 flows into, then accumulates ink since bottom wall part 2413.If the liquid level of ink is more than communication port 243, becoming can lead to Cross the state that the communication port 243 supplies ink to second Room 242.In addition, if the pump 9 for being housed in pumping section 232 operates, then lead to Removing port 2414 and liaison tube 232P are crossed, the ink for being stored in the first Room 241 is attracted, and passes through shunt valve 235 and downstream Pipe 234 is supplied to head unit 21 by the ink of high-pressure trend.

Referring to Figure 35 and Figure 37, when substantially overlooking, the rounded shape of second Room 242.Second Room 242 is by from tank portion base What plate 310 was provided projectingly to the right second defines wall 2421 and defines.Second defines the circle for the shape that wall 2421 has in cylinder type The top wall 2423 that barrel 2422 and the rectangle part by being provided projectingly in the top of cylindrical wall 2422 are formed.The spring Seat 2415 is set in the center in the region surrounded by cylindrical wall 2422, that is, in the position recess concentric with cylindrical wall 2422 It sets in tank portion substrate 310.Communication port 243 configures on the plumb line by the central point of spring base 2415 in spring base 2415 Top.

Contact room 244 (a part of the second service duct) is continuously provided in the lower end of second Room 242.Contact room 244 It is the space of rectangle elongated in the longitudinal direction, linearly extends from the lower end of cylindrical wall 2422 towards front.Contact room 244 are defined by wall portion 2441.The lower part for being connected to second Room 242 with contact room 244 is equipped in the lower end of cylindrical wall 2422 Channel 2424.Wall portion 2441 is connected to cylindrical wall 2422 in the position of lower passage 2424.Contact room 244 is connection second Room 242 with the space of downstream tube 234, be set at the space of negative pressure, substantially constitute a part of second Room 242.

In the region surrounded by the top wall 2423 of second Room 242, it has been provided projectingly front and back to the right from tank portion substrate 310 A pair of support plate 2425.A pair of of support plate 2425 has the pivotal support portion 2426 of pivotal support push part 50 respectively.? The roof 2423A for constituting the topmost (roof for defining second Room 242) of top wall 2423 has been provided projectingly protruding portion upwards 2427 and upper monitoring port 2428.Protruding portion 2427 has in inside as the prominent of the opening that second Room 242 is communicated with the atmosphere Portal.The protruding portion 2427 constitutes a part in exhaust gear portion 237, is assembled with aftermentioned rod unit 246 and return spring 247。

In roof 2423A, upper Judas-hole 242B has been pierced by the front side of protruding portion 2427.Moreover, defining contact room The roof 2442 of 244 wall portion 2441 has been pierced by lower Judas-hole 2444.Corresponding to upper Judas-hole 242B, erect in roof 2423A It is provided with monitoring port 2428.Corresponding to lower Judas-hole 2444, the setting of roof 2442 is provided with lower monitoring port 2445.Prison Upper end depending on pipe 236 is connected to upper monitoring port 2428, and lower end is connected to lower monitoring port 2445.That is, monitoring pipe 236 It is connected to the upper end side and lower end side of second Room 242, monitors the ink level in pipe 236 and the ink level in second Room 242 Linkage.Monitoring pipe 236 is formed by transparent pitch tube.Therefore, user confirms monitoring pipe 236 by visual observation, is able to know that second Ink level in room 242.

Adverse current prevents mechanism part 238 to be arranged on roof 2442 near the front end of contact room 244.Corresponding to countercurrently preventing Mechanism part 238 has been pierced by supply orifice 2443 in roof 2442.The upstream end 341 of downstream tube 234, which is connected to adverse current, prevents mechanism part 238.The ink of second Room 242 is stored in a manner of being attracted by ink blowing unit 22 (Fig. 5) by supply orifice 2443 and inverse Stream prevents mechanism part 238 and is supplied to downstream tube 234.About mechanism part 238 is countercurrently prevented, will be described later in detail.

Referring to Figure 36 (A) and (B), the opening of the left side side of the first Room 241 is closed by the close membrane 70A of resin.Closing Film 70A be in first define wall 2411 from the left side when the consistent outer shape of wall shape.Pass through the week of close membrane 70A Edge welding is adhered to the first end face for defining wall 2411, and close membrane 70A closes the opening of the first Room 241.

The opening of the right side side of second Room 242 is detected with the flexible atmospheric pressure formed by the membrane element of resin Film 70 is closed.Atmospheric pressure detects the wall portion 2,441 1 that film 70 is in defines wall 2421 and contact room 244 by the second of second Room 242 The consistent outer shape of wall shape of body.Atmospheric pressure detection film 70 by welding or be adhered to cylindrical wall 2422 end face, on The end face of portion's wall 2423 and the end face of wall portion 2441 and the opening for closing second Room 242 and contact room 244.In addition, atmospheric pressure Detection film 70 is fused or is bonded in the state of not particularly being applied tension.

Pumping section 232 is adjacent to the rear in tank portion 231 and is configured, and has the pump chambers 321 and pivotal support of receiving pump 9 The camshaft insertion hole 322 that the camshaft 93 (Fig. 4) of the eccentric cam 91 of pump 9 is inserted through.The opening of the right side side of pump chambers 321 By 323 closing of pump cover.

[the negative voltage supply mechanism of second embodiment]

Liquid supplying unit 3A involved in second embodiment also has opposite with the reduction of the ink in second Room 242 It answers, the negative voltage supply mechanism of ink is supplied from the first Room 241 to second Room 242.Basic structure is identical with first embodiment, but It is that push part 50 is different on the point using the structure of the principle pushing open and close valve 6 of lever.

Figure 38 (A) and (B) are the perspective views of the mutually different push part 50 of view direction.Push part 50 is to can be rotated Ground is configured in the component in second Room 242.Push part 50 has: the plectane portion 251 formed by circular plate；From plectane A pair of of the arm 252 extended on the outside of the upper lateral in portion 251；The fulcrum of the extension distal portion of each arm 252 is set 253；And a pair of links protrusion 254.A pair of of fulcrum 253 is by the pivot for a pair of of the support plate 2425 configured in second Room 242 Support portion 2426 (Figure 35, Figure 37) pivotal support.Accordingly, plectane portion 251 can be rotated around the axis of fulcrum 253.First embodiment party The push part 5 of formula is rotationally supported on lower end side, and the push part 50 of second embodiment is rotationally supported In upper end side, the two is different in this regard.

Plectane portion 251 is the internal diameter relative to the most cylindrical wall 2422 for defining second Room 242, has 1/2 or so Size diameter plectane.Cylindrical wall 2422 with by the plectane portion 251 in the state of 2426 pivotal support of pivotal support portion Configuration relation substantially same heart shaped.Plectane portion 251 has: the first opposite face 251A with atmospheric pressure detection film 70；And with open The second opposite face 251B of valve closing 6.In the radial center in plectane portion 251, by from the second face side 251B it is outstanding in a manner of be equipped with bullet Spring mosaic process 2511.In the right part of the chimeric force application spring 245 formed by coil spring of the spring mosaic process 2511.Separately Outside, in the first face side 251A, the region of spring mosaic process 2511 becomes columned recess portion.

Plectane portion 251 has: receiving the compression zone 25A of displacement force from atmospheric pressure detection film 70；And from force application spring 245 By active force by force section 25B.Compression zone 25A is the week of spring mosaic process 2511 in the first face 251A in plectane portion 251 The region of edge.The area for the spring mosaic process 2511 being fitted by the force application spring 245 that force section 25B is the second face side 251B Domain.That is, being set at position corresponding with compression zone 25A by force section 25B.

In the case where compression zone 25A does not receive displacement force from atmospheric pressure detection film 70, plectane portion 251 is in close to nature The state to hang down.But the right end in force application spring 245 is connected to and is contacted with atmospheric pressure by force section 25B, the first face 251A Detect the state of the inner face of film 70.On the other hand, if compression zone 25A detects film 70 by force application spring 245 from atmospheric pressure Displacement force more than active force, then plectane portion 251 is rotated around the axis of fulcrum 253 towards left, is become to the left from the state of hanging down The inclined state in side.

The lower end 2521 of a pair of of arm 252 is located at the both sides of spring mosaic process 2511, chimeric with spring The positional relationship that protrusion 2511 is clamped by a pair of of lower end 2521.A pair of of arm 252 is respectively facing top from each lower end 2521 Linearly extend.Between a pair of of arm 252, the notch 2512 of incision is radially equipped in plectane portion 251.It is a pair of Arm 252 extends from plectane portion 251 in parallel across the notch 2512.

Rectangular-shaped thick arm 2522 is equipped in the centre of the up and down direction of each arm 252.Thick arm 2522 is configured in Near the upper end in the plectane portion 251 and side of notch 2512.That is, a pair of of thickness arm 2522 across notch 2512 and It stands facing each other in the longitudinal direction.It has been provided projectingly each along the longitudinal direction from the distal portion 2523 of the elongated end as each arm 252 Point portion 253.Specifically, it has been provided projectingly fulcrum 253 towards front from the leading flank of the distal portion 2523 of front side, from rear side The trailing flank of distal portion 2523 be provided projectingly fulcrum 253 towards rear, and two fulcrums 253 are towards the side left mutually To being provided projectingly.Fulcrum 253 is embedded in the pivotal support portion 2426 of support plate 2425.In the extension distal portion of arm 252 2523 setting fulcrums 253, help to increase aftermentioned lever ratio.

A pair of of fulcrum 253 is arranged on the rotation axis 25AX extended along the longitudinal direction.The fulcrum 253 and rear side of front side Fulcrum 253 separate as defined in interval D and be configured.That is, a pair of of fulcrum 253 is across being equivalent to plectane portion 251 In-plane middle section part and leave configuration mutually.Interval D for example may be set to the diameter in plectane portion 251 40%~80% or so size.Accordingly, the rotating fulcrum that a pair of of fulcrum 253 is formed becomes separation and clamps plectane portion 251 The rotating fulcrum of the wide cut of the degree of middle section.Therefore, around the rotating fulcrum rotation plectane portion 251 be difficult to around perpendicular to The axis of rotation axis 25AX and reverse.Therefore, the rotational action in plectane portion 251 can be made to stablize.

A pair of links protrusion 254 is provided projectingly near the upper end in plectane portion 251 from the second face 251B towards left.In detail For, it erects from each ora terminalis towards notch 2512 of a pair of thick arm 2522 to be provided with respectively and is formed by the plate of rectangle Link protrusion 254.Therefore, a pair of links protrusion 254 is located at a pair of of inside of fulcrum 253 and the middle section in plectane portion 251. Each link protrusion 254 has tie rod holes 2541.The tie rod holes 2541 are for shown in push part 50 and first embodiment The connecting rod of open and close valve 6 combines.It is combined by the connecting rod, the on-off action of open and close valve 6 and the rotational action of push part 50 link.

In other words, the rotation that link protrusion 254 becomes the push part 50 for corresponding to the axis rotation around fulcrum 253 is moved Make, pushing open and close valve 6 makes the pressing portion that it is moved in left-right direction.In compression zone 25A (force) and fulcrum 253 (fulcrum) In relationship, link protrusion 254 (position) is set between compression zone 25A and fulcrum 253.That is, compression zone 25A, fulcrum 253 and link protrusion 254 are set to make the positional relationship of second-class lever to set up.Therefore, can make to be pressurized The displacement force that atmospheric pressure suffered by portion 25A detects film 70 increases amount corresponding with the ratio of lever ratio, will push against power from connecting rod Protrusion 254 is applied to open and close valve 6.

The negative pressure of the second embodiment for the push part 50 for illustrating to have described using the schematic diagram of Figure 39 (A), (B) supplies Answer the movement of mechanism.Figure 39 (A) indicates that push part 50 (plectane portion 251) is in the posture that hangs down, and open and close valve 6 is in and closes posture State, Figure 39 (B) indicate the inclination attitude that push part 50 rotates, and open and close valve 6 is in the state for opening posture.

The state of Figure 39 (A) is the displacement force that atmospheric pressure detection film 70 does not generate the degree for rotating plectane portion 251 State, that is, total state greater than atmospheric pressure of the internal pressure of the spring pressure and second Room 242 of force application spring 245.Although second Room 242 be negative pressure, and still, force application spring 245 will be greater than the work of the displacement force of the atmospheric pressure detection film 70 generated based on the negative pressure It is firmly applied to by force section 25B.Therefore, plectane portion 251 does not maintain the appearance to hang down around the axis rotation of fulcrum 253 Gesture.

If improved by the vacuum degree of the consumption second Room 242 of ink, second Room 242 reaches more than defined threshold value Negative pressure, then atmospheric pressure, which detects film 70 and applies to the compression zone 25A in plectane portion 251, resists the active force of force application spring 245 and pushes away Pressure.That is, the internal pressure of the spring pressure and second Room 242 as force application spring 245 adds up to subatmospheric state.At this point, As shown in Figure 39 (B), plectane portion 251 resists the active force of force application spring 245 and rotates around the axis of fulcrum 253 towards left. Also, by the rotation, the generation of link protrusion 254 allows pushing force of the open and close valve 6 towards left, makes the posture changing of open and close valve 6 To open posture.

According to the push part 50 of second embodiment, link protrusion 254 can be allowed to generate big push away using the power of lever Pressure.Specifically, configured with the link protrusion 254 for pushing open and close valve 6 between compression zone 25A and fulcrum 253.Namely It says, push part 50 is using the axis fulcrum of fulcrum 253 as fulcrum P21, using compression zone 25A as force P22, with link protrusion 254 The pushing structure of open and close valve 6 is realized for the principle of position P23, and utilization lever.Therefore, film will can be detected by atmospheric pressure 70 displacement force and the pushing force for being applied to compression zone 25A increase corresponding with the ratio of lever ratio amount, and from link protrusion 254 are applied to open and close valve 6.Therefore, link protrusion 254 can be allowed to push open and close valve 6 with biggish pushing force, it can be ensured that be used for Make the sufficient pushing force that open and close valve 6 in time moves.

Push part 50 has the arm 252 extended upward from the upper end side in plectane portion 251, as rotating fulcrum Fulcrum 253 the extension distal portion 2523 of the arm 252 is set.The structure keeps compression zone 25A (force P22) and connecting rod prominent The distance for playing 254 (position P23) is elongated, helps to increase lever ratio.Therefore, the generation of push part 50 can be further increased Pushing force.

[adverse current of second embodiment prevents mechanism part]

In the following, illustrating that the adverse current of second embodiment prevents mechanism part 238 referring to Figure 37, Figure 40 (A) to Figure 42 (B).It is inverse It is to prevent pressurized ink to 242 adverse current of second Room when executing the pressurization cleaning module that stream, which prevents mechanism part 238, Mechanism.Adverse current is shown in Figure 37 prevents the exploded perspective view of mechanism part 238.It includes valve pipeline that adverse current, which prevents mechanism part 238, 281, branch head 282, sphere 283, seal member 284, coil spring 285 and O-ring 286.Valve pipeline 281 is and contact room The component of 244 2442 one of roof, other elements are assembled in valve pipeline 281.Figure 40 (A) and (B) be except valve pipeline 281 with Outer adverse current prevents the perspective view of mechanism part 238, and Figure 40 (C) is perspective view when observing from below on branch head 282.

Valve pipeline 281 is the pipeline vertically extended from the upper surface of roof 2442.Valve pipeline 281 is for providing connection The ink flow path of contact room 244 and downstream tube 234 constitutes the ink feed that ink blowing unit 22 (Fig. 5) is reached from second Room 242 The a part in channel.In order to engage branch head 282, it is provided projectingly hooking sheet 2811 in the outer peripheral surface of valve pipeline 281, inside Circumferential surface has been provided projectingly chimeric circular protrusion 2812.

Branch head 282 is the component to form the fluidic junction a of shunt valve 235 and downstream tube 234.Branch head 282 includes First entrance port 2821, second entrance port 2822, outlet port 2823, housing section 2824, locking window 2825, notch 2826 and chimeric pawl 2827.First entrance port 2821 is the connected port in downstream of second Room 242, in present embodiment In, second Room 242 is connected to via valve pipeline 281 and contact room 244.Second entrance port 2822 is the downstream of shunt valve 235 Hold connected port.Outlet port 2823 is the connected port in upstream end 2341 of downstream tube 234.In the impression block Under formula, ink is supplied to downstream tube 234 by first entrance port 2821.On the other hand, under the cleaning module that pressurizes, ink Downstream tube 234 is supplied to by second entrance port 2822.

A pair of circle that housing section 2824 is opposite mutually by the outside in first entrance port 2821 downward and configures Arcs are formed.Valve pipeline 281 enters the gap between a pair of shells portion 2824 and first entrance port 2821.Engaging window 2825 is The opening in a pair of shells portion 2824 is set, is the opening that the hooking sheet 2811 of valve pipeline 281 engages.Notch 2826 is tubular First entrance port 2821 peripheral wall a part of incision part, be for ensuring that the part of the flow path of ink.It is chimeric Pawl 2827 is the part in hook shape being provided projectingly downwards from the lower end of first entrance port 2821, engages valve pipeline 281 Chimeric circular protrusion 2812.That is, branch head 282 passes through hooking sheet 2811 and locking in the inner circumferential of valve pipeline 281 The engaging of window 2825 is fixed in valve pipeline 281 in periphery by the engaging of chimeric circular protrusion 2812 and chimeric pawl 2827.

Sphere 283 is housed in valve pipeline 281 in a manner of it can move to ink feed direction, plays the effect of valve. The outer diameter of sphere 283 is less than the internal diameter of valve pipeline 281, and is less than the internal diameter of coil spring 285.As the material for forming sphere 283 A variety of materials can be used in material, but it is preferable to use the specific gravity relative to ink, and there is the material of 2 times of specific gravity below to be formed.Sphere 283 are buried in ink in valve pipeline 281.By making the specific gravity of sphere 283 close to the specific gravity of ink, sphere 283 can be made Ink feed direction (being herein up and down direction) movement buckling it is small.

In general, the ink for being used in ink-jet printer is water-soluble liquid, specific gravity=1 or with the ratio near it Weight.Therefore, the material as sphere 283 preferably selects the material of specific gravity < 2.In addition, the material is preferably provided with even if always Be contacted with ink will not aging resistance to chemical reagents, the property of abrasion performance.According to these viewpoints, as the material of sphere 283, Particularly preferably use polyacetal resin

Seal member 284 is sealing element in a curved state, such as shown in Figure 41 (B), in the lower section of sphere 283, configuration The portions 2813 of (the upper surface of roof 2442) on the bottom wall of valve pipeline 281.The ring internal diameter (through hole) of seal member 284 is set It is set to the outer diameter less than sphere 283, and is greater than the diameter for the supply orifice 2443 being pierced by roof 2442.As shown in Figure 40 (A), When sphere 283 leaves from the seal member 284, valve pipeline 281 is opened.On the other hand, as shown in Figure 40 (B), when sphere 283 supports When being connected to seal member 284, valve pipeline 281 is closed.

Coil spring 285 is that seal member 284 is connected to its lower end, and upper end is connected to the of branch head 282 The mode of the lower ora terminalis 2828 of one ingress port 2821 is mounted on the compressed spring in valve pipeline 281.Coil spring 285 is to sealing Component 284 applies the power towards portions 2813, and accordingly, seal member 284 is crimped on portions 2813 always.In addition, in coil The inside of spring 285 contains sphere 283, and coil spring 285 also plays the movement of guidance sphere 283 to ink feed direction Effect.Therefore, the travelling of the sphere 283 in valve pipeline 281 is limited, and can be made through the sphere relative to seal member 284 283 abutting or the valve arrangement for leaving and setting up are stablized.

The docking section of O-ring 286 sealing valve pipeline 281 and branch head 282.O-ring 286 is embedded in first entrance port 2821 outer peripheral surface, and be connected to first entrance port 2821 is provided projectingly base portion 2829.

Figure 41 (A) is the cross-sectional view for the state that the adverse current for indicating under printing model prevents mechanism part 238, and Figure 41 (B) is figure The portion the A4 enlarged drawing of 41 (A).The pump 9 for being housed in pumping section 232 is shown in Figure 41 (A).The structure and first embodiment phase of pump 9 Together.In the present embodiment, extruded tube 92 is the pipe with 235 one of liaison tube 232P and shunt valve.That is, one end of extruded tube 92 Side is connected to the bottom wall part 2413 (liaison tube 232P) of the first Room 241, and another side is connected to the second entrance on branch head 282 Port 2822 (shunt valve 235), center portion are set to the press section for the circumferential surface configured in eccentric cam 91.

Pump 9 is in halted state under printing model.At this point, eccentric cam 91 flattens extruded tube 92 and is in the shape stopped Therefore state is closed by the ink feed channel of shunt valve 235.On the other hand, under the cleaning module that pressurizes, pump 9 is rotated forward Driving.At Figure 41 (A), the forward rotation direction of eccentric cam 91 is counterclockwise.By it is such pump 9 forward drive, ink from First Room 241 is attracted by liaison tube 232P, prevents mechanism part 238 from shunt valve 235 towards the adverse current as fluidic junction a. In addition, becoming the pressure reducing mode as shown in Fig. 9 (B) if pump 9 is inverted driving, passing through shunt valve 235 and branch head 282,234 negative pressure of contact room 244 and second Room 242 and downstream tube.

Then, illustrate that adverse current prevents the movement of mechanism part 238.Under printing model (first state), ink is from second Room 242 utilize through contact room 244, mechanism part 238 and the supply path of downstream tube 234 are countercurrently prevented to be supplied to head unit 21. Under such printing model, as shown in Figure 41 (B), sphere 283 leaves from seal member 284, becomes the state floated upwards. This is because being maintained negative pressure under printing model from second Room 242 to the supply path of downstream tube 234.Along with head list The ink blowing unit 22 of member 21 attracts the ink being present in the supply path whenever spraying ink droplet, thus in sphere 283 The power towards ink feed direction is acted on, sphere 283 floats in the liquid of ink from seal member 284.

Since sphere 283 leaves from seal member 284, the supply orifice 2443 of contact room 244 becomes the shape being opened State.On the other hand, sometimes because of the attraction of ink blowing unit 22, sphere 283 is floating up to being connected to first entrance port 2821 Until lower ora terminalis 2828.Figure 40 (A) shows the floating state up to upper of sphere 283.In this case, due to first The peripheral wall of ingress port 2821 has notch 2826, therefore, also ensures that the channel of ink.Therefore, ink can be from contact room 244 pass through towards branch head 282.

Figure 42 (A) be indicate pressurization cleaning module (the second state) under adverse current prevent mechanism part 238 state section view Figure, Figure 42 (B) is the portion the A5 enlarged drawing of Figure 42 (A).Under the cleaning module that pressurizes, using the forward drive of pump 9, pass through shunt valve 235 pressurized inks are supplied to (the fluidic junction a) of second entrance port 2822 on branch head 282.Therefore, shunt valve 235 It is pressurized by pressurized ink with the downstream tube 234 positioned at the downstream side of fluidic junction a.At this point, ink be pressurised into it is super Cross the high pressure of 100kPa.If such high pressure is applied in second Room 242, the atmosphere of a part of second Room 242 is defined sometimes Pressure detection film 70 rupture or the mounting portion for defining wall 2421 to second are removed.

But in the present embodiment, using the plus-pressure for being applied to fluidic junction a, (ink supplies sphere 283 downward Answer the upstream side in direction) it is pressed, sphere 283 is connected to seal member 284.Figure 40 (B) and Figure 42 (B) are shown by described Pressing, sphere 283 are embedded in the state in the ring of seal member 284.It is connected to by sphere 283 and is pressed by coil spring 285 To the seal member 284 of portions 2813, supply orifice 2443 becomes blocked state.That is, the ink feed road under printing model In diameter, contact room 244 and second Room 242 positioned at the upstream side of fluidic junction a are interdicted from the pressurization of pressurized ink.Therefore, energy Enough breakages etc. for preventing atmospheric pressure detection film 70 in advance.

[variation]

Embodiments of the present invention are explained above, but the present invention is not limited to this, such as can be used as described below Variant embodiment.

(1) in said embodiment, liquid supplying unit 3 according to the present invention is instantiated, 3A is printed to ink jet type The head unit 21 of machine 1 supplies the mode of ink.Liquid supplying unit 3,3A storage, the liquid supplied are not limited to ink, can Using various liquid as object.For example, liquid supplying unit can be regard water, various solution, medical fluid, industrial chemical liquid etc. as 3, the storage of 3A, supply object.

(2) in the first embodiment, instantiating prevents mechanism part 38 using the adverse current of sphere 83, but this is one Example, can also be used various counter-flow preventing structures.For example, the valve body with reset spring can be used in valve pipeline 81 and supply orifice 42H is configured in opposite directions, and the valve body blocks the structure of supply orifice 42H when applying the pressure that pressurization is removed.

(3) in said embodiment, the open and close valve 6 for having umbrella valve 66 is instantiated, but is replaced, it can also be by various shiftings Dynamic formula valve is used as opening and closing member.Moreover, for example in the first embodiment, showing push part 5 and open and close valve 6 passing through The example that link protrusion 54 and 65 connecting rod of link pin combine, but the two also may not be that connecting rod combines.For example, it is also possible to be pressing portion The state that a part of part 5 and a part of open and close valve 6 are contacted always by formation such as springs, and by its contact portion, it pushes The structure of the pushing open and close valve 6 of component 5.

(4) for example in the first embodiment, it shows push part 5 and has and separated on rotating shaft direction mutually A pair of of fulcrum 53 example.It replaces, a long axis along rotating shaft direction extension can be used also as fulcrum Portion 53.Alternatively, in the case where the rotation of push part 5 torsion is not a problem fulcrum will be formed in the distal end of an arm Component come replace the embodiment a pair of of arm 52 and a pair of of fulcrum 53.In addition it is also possible to omit arm 52 and Fulcrum 53 is nearby arranged in the upper end in plectane portion 51.

(5) in said embodiment, open and close valve 6 shown in Figure 15 (A) and (B) is instantiated as opening and closing member, but The valve of variable more other structures.Figure 43 (A) is the perspective view of open and close valve 6A involved in variation, and Figure 43 (B) is open and close valve The exploded perspective view of 6A.Open and close valve 6A is supported 61A by valve and is formed by the assembly of the valve support 61A umbrella valve 66 kept.Umbrella Valve 66 is identical structure with the umbrella valve that Figure 15 (B) illustrates is based on before, therefore, in this description will be omitted.

Valve support 61A has 1611 He of first end for being located at 41 side of the first Room in the state of being assembled in communication port 43 The second end 1612 positioned at 42 side of second Room.It includes the canister portion 162 of 1611 side of first end, the second end that valve, which supports 61A, The flat part 163 of 1612 sides, the middle part 164 between canister portion 162 and flat part 163 and it is disposed in flat part 163 Link pin 165.Umbrella valve 66 is maintained at 1611 side of first end of valve support 61A.

Canister portion 162 is to run through umbrella valve 66 in through hole 166 in the cylindric part that radial center has through hole 166 Pin portion 662.The internal diameter of through hole 166 is less than the diameter in the locking bulb 663 of umbrella valve 66, but utilizes caoutchouc elasticity, with locking Bulb 663 is pressed into and by way of, and pin portion 662 is inserted through through hole 166 from first end 1611.In the outer of canister portion 162 Circumferential surface, spaced set has the multiple flow passage grooves 167 being radially recessed in the circumferential.Flow passage groove 167 becomes open and close valve 6A and is in The flow path of ink flow when opening posture.

Middle part 164 is that have and the width that roughly same outer diameter of canister portion 162, and the flat part wider than flat part 163 Point.The pin receiving portion 168 formed by the notch in receiving pin portion 662 is provided in the part of middle part 164 to flat part 163.Cylinder Portion 162 and middle part 164 are housed in the large-diameter portion 43A of communication port 43.When open and close valve 6A is moved in left-right direction, canister portion 162 and the outer peripheral surface of middle part 164 become the guide surface 162S that is guided by large-diameter portion 43A.In flat part 163 and middle part 164 Boundary portion there is the abutting part 164A that is formed of step by the width difference based on the two.The platform of abutting part 164A and communication port 43 Rank portion 43C (Figure 17 (B)) is opposite and abuts.The link pin 165 for being provided projectingly on flat part 163 is embedded in the company of push part 5 The tie rod holes 541 (Figure 14 (B)) that bar protrusion 54 has.

In open and close valve 6A, when in posture is closed, sealing wall surface 43S is connected to by the sealing surface 67 of umbrella valve 66 (Figure 16 (B)), communication port 43 are closed.On the other hand, when in posture is opened, sealing surface 67 leaves sealing wall surface 43S, passes through stream Road slot 167 and ink flow.In addition, when excessive internal pressure acts on second Room 42, the point of the umbrella shape shape reversion in umbrella portion 661 with As the explanation of Figure 29 (A) and (B).In open and close valve 6A as above, the effect as opening and closing member can be also played.

Claims

1. a kind of liquid supplying unit, from the fluid storage container of specified liquid is stored to the liquid injection of the injection liquid Head supplies the liquid, characterized by comprising:

Pressure chamber can store the liquid；

First service duct is connected to the fluid storage container with the pressure chamber；

Second service duct is connected to the liquid ejecting head with the pressure chamber；

Service duct is bypassed, the upstream end in liquid supply direction is allowed to be connected to first service duct, downstream and described the Two service ducts converge；And

Pressing mechanism is configured in the bypass service duct, adds to the liquid to circulate in the bypass service duct Pressure.

2. liquid supplying unit according to claim 1, it is characterised in that further include:

Countercurrently anti-locking mechanism, second service duct with it is described bypass service duct the downstream fluidic junction it is upper Side configuration is swum in second service duct, prevents the liquid to be pressurizeed by the pressing mechanism inverse towards the pressure chamber Stream.

3. liquid supplying unit according to claim 2, which is characterized in that

The pressure chamber, the anti-locking mechanism of the adverse current and second service duct are configured to along the vertical direction: the adverse current is anti- Locking mechanism is located at the lower section of the pressure chamber, and the confluence portion is located at the lower section of the anti-locking mechanism of the adverse current.

4. liquid supplying unit according to claim 1, which is characterized in that

The a part for defining the wall portion of the pressure chamber is formed by flexible membranes component.

5. liquid supplying unit according to claim 1, it is characterised in that further include:

Air is discharged from the pressure chamber in exhaust gear.

6. liquid supplying unit according to claim 3, which is characterized in that the anti-locking mechanism of adverse current includes:

Valve pipeline, vertically extends, and constitutes a part of second service duct；

Sphere is housed in the valve pipeline in a manner of it can supply direction movement to the liquid；And

Seal member is configured in the upper end of the valve pipeline, the valve is closed when the sphere is connected to the seal member Pipeline opens the valve pipeline when sphere for supplying direction to the liquid leaves the seal member, Wherein,

The sphere, under the first state for supplying the liquid from the pressure chamber to the liquid ejecting head, in the valve Is left using self weight decline from the seal member in pipeline, by the bypass service duct to the liquid injection Under second state of the pressurized liquid of head supply, is risen in the valve pipeline using the pressurization and be connected to described Seal member.

7. liquid supplying unit according to claim 6, which is characterized in that

The pressure chamber has liquid spraying outlet in its lowest end,

The valve pipeline be from the liquid spraying outlet to the pipeline extended below vertical, on it end side have make it is described close Seal component the portions of seat, having the sphere of accepting the first state in lower end side and have becomes liquid flow path and cutting The ball-joint socket part of oral area,

The pipelines for constituting other a part of second service duct include from the lower end side of the valve pipeline to vertical The vertical portion that lower section is extended,

The downstream of the bypass service duct meets at the vertical portion.

8. liquid supplying unit according to claim 2, which is characterized in that the anti-locking mechanism of adverse current includes:

Valve pipeline constitutes a part of second service duct；

Seal member closes the valve pipeline when the sphere is connected to the seal member, when by supplying to the liquid When the sphere in direction leaves the seal member, the valve pipeline is opened, wherein

The sphere, under the first state for supplying the liquid from the pressure chamber to the liquid ejecting head, from described close Envelope component leaves, the second of the liquid being pressurized by the bypass service duct to liquid ejecting head supply Under state, it is connected to the seal member.

9. liquid supplying unit according to claim 8, which is characterized in that

Under the fluid storage container described in the liquid supplying unit is configured in top, the liquid ejecting head is configured in Side, also, the liquid supplying unit utilized head difference is from the fluid storage container to described in liquid ejecting head supply Liquid,

In said first condition, the pressure chamber and second service duct are maintained negative pressure,

In said second condition, second service duct in the downstream side of the bypass service duct and the fluidic junction is logical It crosses the pressurized liquid and is pressurized,

The sphere is left in the first state using the negative pressure from the seal member, in second state The seal member is connected to using the pressurization.

10. liquid supplying unit according to claim 8, which is characterized in that

The seal member is in have ring-shaped of the diameter less than the through hole of the outer diameter of the sphere,

The valve pipeline have make the seal member the portions of seat,

The anti-locking mechanism of adverse current is also equipped with coil spring, which is installed in the valve pipeline, to the sealing Part applies the power towards the portions, also, guides the movement to liquid supply direction of the sphere.

11. liquid supplying unit according to claim 6, which is characterized in that

The range that it is 1.1 times to 1.5 times relative to the specific gravity of the liquid that the specific gravity of the sphere, which is set at,.

12. liquid supplying unit according to claim 8, which is characterized in that

The valve pipeline is the pipeline vertically extended,

The specific gravity of the sphere is set to relative to the specific gravity of the liquid be 2 times or less.

13. liquid supplying unit according to claim 4, it is characterised in that further include:

Upstream chamber constitutes a part of first service duct, is configured in liquid supply direction relative to the pressure chamber Upstream side；

Wall portion has the communication port for being connected to the upstream chamber with the pressure chamber；

Opening and closing member is configured in the communication port, closes opening for posture and the opening communication port close the communication port Posture changing is carried out between posture；

Force application part, Xiang Suoshu opening and closing member apply the power that the direction of posture is closed described in；And

Push part, the direction that the opening and closing member can be opened to posture described in push,

The flexible membranes component be based on the indoor liquid of the pressure reduction and generate negative pressure displacement, and by its Displacement force is transferred to the component of the push part,

The push part includes the compression zone for receiving displacement force from the flexible membranes component；And utilize the compression zone Suffered displacement force, the active force for resisting the force application part push the pressing portion of the opening and closing member.

14. liquid supplying unit according to claim 13, which is characterized in that

Under the first state for supplying the liquid from the pressure chamber to the liquid ejecting head, the pressure chamber and described Two service ducts are maintained negative pressure,

Under the second state of the liquid being pressurized by the bypass service duct to liquid ejecting head supply, institute State bypass service duct and the fluidic junction downstream side second service duct by be pressurized the liquid by Pressurization, also, pass through the anti-locking mechanism of the adverse current, second service duct of the upstream side of the fluidic junction and the pressure It is interdicted from the pressurization power room.

15. liquid supplying unit according to claim 1, which is characterized in that

The pressing mechanism is mounted in the pump of the liquid supplying unit.

16. a kind of liquid injection apparatus, characterized by comprising:

Liquid ejecting head sprays specified liquid；And

Liquid supplying unit as described in any one of claims 1 to 15, from store the fluid storage container of the liquid to The liquid ejecting head supplies the liquid.