CN206394244U - Fluid Supplying apparatus and liquid injection apparatus - Google Patents

Abstract

The utility model provides a kind of fluid Supplying apparatus, and it has liquid container and liquid flow path portion, and aforesaid liquid host body has liquid storage portion, air introduction portion, liquid injection port and liquid supply port；Aforesaid liquid flow path portion is formed in the supply line of the liquid between liquid container and fluid jetting head.The liquid flow that above-mentioned air introduction portion has the outflow for limiting the aforesaid liquid for coming from aforesaid liquid resettlement section goes out limiting unit.Seal member is releasably installed on aforesaid liquid inlet.Aforesaid liquid flow path portion, which has, can be opened and closed the stream valve of above-mentioned supply line.Above-mentioned seal member is to maintain the sealing state of aforesaid liquid inlet to be constituted in the way of untill the pressure of the inside of aforesaid liquid resettlement section reaches the pressure specified.The above-mentioned pressure specified is pressure more than critical pressure, and above-mentioned critical pressure is the minimum pressure that aforesaid liquid can be leaked from above-mentioned supply line.

Description

Fluid Supplying apparatus and liquid injection apparatus

Technical field

The utility model is related to fluid Supplying apparatus and liquid injection apparatus.

Background technology

It is used as a kind of form of liquid injection apparatus, it is known that exist a kind of to printing ejection ink so as to form image Ink-jet printer (hreinafter referred to as " printer ").In printer, generally pass through one kind equivalent to fluid Supplying apparatus The feed mechanism of the ink of form is from a kind of ink tank of form as liquid container to the print head as fluid jetting head Supply ink.In printer, it is present in the form that ink tank is provided with the inlet for being used to supplement ink.

All the time, in such printer, it is that ink is contained in the state of ink tank situations such as being carried Under, exist ink from ink tank or ink flow path etc. leak to outside the problem of.For it is such the problem of, such as in following patents In the technology of document 1, when in ink tank unit be located at than print head closer to the position of top configuration posture when, pass through resistance Fill in the leakage of the ink for the nozzle for being connected to the flexible pipe of print head to suppress to come from print head.In addition, in following patent documents 2 Technology in, be provided with the air intake of ink tank for preventing the cover of ink leakage.

Patent document

Patent document 1：Japanese Patent Laid-Open 2012-71581 publications

Patent document 2：Japanese Patent Laid-Open 2012-196777 publications

Utility model content

But, it is significantly higher when printer is carried into height above sea level in the state of the stream of closing ink by this way Place or temperature significantly higher place when, the air existed in the stream of ink is expanded, and is produced and extruded ink To the situation of outside power.Inventor of the present utility model has found in this case, even above-mentioned patent document 1,2 Technology, it is also possible to can not fully suppress the leakage of ink.In this way, for the technology of the leakage for suppressing the ink in printer Still there is room for improvement.

The utility model is, in order to which solution is never limited to printer, at least to supply dress in fluid Supplying apparatus or with the liquid Above-mentioned technical problem in the liquid injection apparatus put and complete, and can be realized as following mode.

[1] according to first method of the present utility model, there is provided a kind of fluid Supplying apparatus.The fluid Supplying apparatus can have Liquid container and liquid flow path portion.Aforesaid liquid host body can have liquid storage portion, air introduction portion, liquid injection port with And liquid supply port.Aforesaid liquid resettlement section can house supply to the liquid of fluid jetting head.Above-mentioned air introduction portion can be to Aforesaid liquid resettlement section imports air.Aforesaid liquid inlet can inject aforesaid liquid to above-mentioned liquid storage portion.Above-mentioned liquid Body supply mouth can be such that aforesaid liquid is flowed out from aforesaid liquid resettlement section to above-mentioned fluid jetting head.Aforesaid liquid flow path portion may make up The supply line of aforesaid liquid between aforesaid liquid host body and aforesaid liquid shower nozzle.Above-mentioned air introduction portion can have limitation The liquid flow that aforesaid liquid flows out from aforesaid liquid resettlement section goes out limiting unit.The seal member of sealing aforesaid liquid inlet can be filled It is installed on aforesaid liquid inlet with unloading.Aforesaid liquid flow path portion, which can have, can be opened and closed the stream valve of above-mentioned supply line.On The sealing state of aforesaid liquid inlet can be maintained until the pressure of the inside of aforesaid liquid resettlement section is reached by stating seal member Mode untill the pressure specified is constituted.The above-mentioned pressure specified can be to be more than critical pressure (limiting pressure) Pressure, above-mentioned critical pressure is the minimum pressure that aforesaid liquid can be leaked from above-mentioned supply line.According to which Fluid Supplying apparatus, goes out limiting unit or seal member, stream valve to suppress liquid from air introduction portion or liquid by liquid flow Inlet, the leakage in liquid flow path portion.Particularly, it is placed in even in fluid Supplying apparatus and is contained in the liquid of liquid storage portion Pressure be higher than supply line in critical pressure configuration status in the case of because can suppress seal member from liquid inject Mouth comes off, so further suppressing the leakage of liquid.

[2] in the fluid Supplying apparatus of aforesaid way, above-mentioned critical pressure is 20kPa, and above-mentioned seal member can be down to Side of the sealing state of aforesaid liquid inlet untill the pressure of the inside of aforesaid liquid resettlement section reaches 20kPa is maintained less Formula is installed on aforesaid liquid inlet.According to the fluid Supplying apparatus of which, even if the pressure in liquid storage portion is up to 20kPa, can also suppress seal member and be come off from liquid injection port.

[3] in the fluid Supplying apparatus of aforesaid way, above-mentioned seal member can be installed on aforesaid liquid by screw-type Inlet.According to the fluid Supplying apparatus of which, it can further suppress seal member and be come off from liquid injection port.

[4] in the fluid Supplying apparatus of aforesaid way, aforesaid liquid outflow limiting unit can be including allowing above-mentioned air The part that portion circulates but limitation aforesaid liquid internally circulates is constituted.According to the fluid Supplying apparatus of which, by simple Structure ensures the circulation of the air in air introduction portion, meanwhile, it is capable to suppress liquid from the leakage in air introduction portion.

[5] in the fluid Supplying apparatus of aforesaid way, aforesaid liquid flow path portion include aforesaid liquid can circulate it is many Individual tube parts and the joint component for making above-mentioned tube parts be connected to each other, above-mentioned tube parts and above-mentioned joint component can be with The mode that mutual connection will not be at least released untill above-mentioned critical pressure is reached is constituted.Supplied and filled according to the liquid of which Put, the leakage of the liquid in joint component can be suppressed.

[6] in the fluid Supplying apparatus of aforesaid way, aforesaid liquid flow path portion is included in the leading portion of aforesaid liquid shower nozzle In can store the fluid retention room of aforesaid liquid, above-mentioned stream valve can be located at the entrance of aforesaid liquid reserving chamber.According to the party The fluid Supplying apparatus of formula, can suppress liquid and be leaked from the fluid jetting head of the supply destination as liquid.

[7] in the fluid Supplying apparatus of aforesaid way, above-mentioned stream valve aforesaid liquid reserving chamber be changed into specifying it is negative It can open, can be closed during the negative pressure specified in pressure higher than above-mentioned during pressure.According to the fluid Supplying apparatus of which, it can suppress many Remaining liquid flows into fluid jetting head, so as to further suppress leakage of the liquid from fluid jetting head.

[8] according to second method of the present utility model, there is provided a kind of liquid injection apparatus.The liquid injection apparatus can have The fluid Supplying apparatus of any one above-mentioned mode and aforesaid liquid shower nozzle.According to the fluid Supplying apparatus of which, even if by It is placed in the environment of the pressure of the liquid in inside is significantly uprised or in the case of configuration status, can also suppresses liquid to outside Spill.

Multiple inscapes that above-mentioned each mode of the present utility model has not are all requisite items, to understand Certainly some or all of above-mentioned technical problem, or to realize part or all of effect described in this specification, can fit A local part to above-mentioned multiple inscapes is changed, deleted, the replacement with other inscapes newly and left out Limit a part for content.In addition, in order to solve some or all of above-mentioned technical problem, or to realize in this specification Part or all of effect recorded, can by a part for the technical characteristic included in a kind of above-mentioned mode of the present utility model or All it is combined with part or all of the technical characteristic that is included in above-mentioned other manner of the present utility model, is used as this reality With a new independent mode.

The utility model can be realized in the various modes beyond fluid Supplying apparatus or liquid injection apparatus.Example Such as, middle as follows it can be realized：Liquid container, fluid Supplying apparatus or liquid for fluid Supplying apparatus spray Encapsulating method, fluid Supplying apparatus or the liquid injection dress of liquid sealing structure, liquid flow path in injection device, liquid container Flow passage structure of liquid in putting etc..

Brief description of the drawings

Fig. 1 is the schematic perspective view for the structure for representing printer.

Fig. 2 is the schematic perspective view for representing the state that opening and closing lid portion is opened in printer.

Fig. 3 is the exploded perspective schematic diagram of ink tank.

Fig. 4 is the schematic cross-section of ink tank.

Fig. 5 extracts the ideograph of the supply line of the ink in printer for expression.

The ideograph of the state of ink tank when Fig. 6 is represents to make printer in reversion posture.

Fig. 7 is for the explanation figure for the critical pressure for illustrating ink flow path portion and cover.

Fig. 8 is the schematic diagram for the structure for representing ink injection unit and cover in this second embodiment.

Fig. 9 is ink injection unit in this second embodiment and the schematic cross-section of cover.

The schematic diagram of the structure in air introduction portions of the Figure 10 for expression in the third embodiment.

The schematic diagram of the structure in air introduction portions of the Figure 11 for expression in the 4th embodiment.

Figure 12 extracts the ideograph of the supply line of the ink in the 5th embodiment for expression.

Figure 13 is the valve chamber and the schematic diagram of the structure of ink storing section in the 5th embodiment of expression.

Embodiment

A. first embodiment：

[structure of ink-jet printer]

Reference picture 1, Fig. 2, (hreinafter referred to as " beat the ink-jet printer 10 in first embodiment of the present utility model Print machine 10 ") structure illustrate.Fig. 1 is the schematic isometric for the structure for representing printer 10.Diagram has expression in Fig. 1 The arrow G of gravity direction, above-mentioned gravity direction be when printer 10 be in assume usually used state when configuration posture (with Under, be referred to as " usual posture ") in gravity direction.In the present embodiment, usual posture is the main scanning direction of printer 10 And sub-scanning direction turns into the configuration posture with plane-parallel.Printed when main scanning direction in printer 10 is is printed First 33 directions reciprocated.Sub-scanning direction is orthogonal with main scanning direction, and print head 33 sprays ink when being printed The direction that the position of water is conveyed to printing PP.

Diagram has arrow X, Y, the Z in three directions for representing mutually orthogonal in Fig. 1.Arrow X is flat with main scanning direction Capable direction, and represent when user is just to the front of printer 10 from left side towards the direction on right side.It should illustrate, this theory " front of printer 10 " in bright book be assume when user operates the printer 10 in usual posture just to face.Arrow Head Y represents the direction parallel with sub-scanning direction, and represents from the rear side of printer 10 towards the direction of face side.Arrow Z represent with the parallel direction of gravity direction when printer 10 is in usual posture, and represent from below upward Direction.In this manual, " on " with " under " mean on the basis of the gravity direction when printer 10 is in usual posture Above-below direction.Diagram is also appropriately in each figure of the institute's reference of arrow G, X, Y, Z in the following description.

Printer 10 is an embodiment of liquid injection apparatus of the present utility model, and it is carried out to being used as printed medium Printing PP ink droplet is sprayed to form the printing treatment of image.Printer 10 has chest portion 11, providing ink portion 20 And Printing Department 30.Chest portion 11 is the resinous hollow box body that is made by injection moulding, and internally contains ink Water supply unit 20 and Printing Department 30.

The face for constituting the positive chest portion 11 of printer 10 is provided with paper outlet 12, interface portion 13 and opening and closing lid portion 15.It is the opening portion for making printing PP be discharged from the inside of printer 10 with paper outlet 12.Interface portion 13 be with Receive the operation button 13b of operation of user with being used for display part 13s of user's offer about the information of printer 10 Position.Opening and closing lid portion 15 can be opened and closed to be installed on located at casing in the way of it can contact (access) internal ink tank 21 The positive opening portion in portion 11.

Fig. 2 is the schematic isometric that expression opening and closing lid portion 15 in printer 10 is open mode.Opening and closing lid portion 15 passes through Linkage 15h (Fig. 1) by way of in rotary moving and be opened and closed can be installed on the front of printer 10.User is opening When closing the opening of cap 15, ink (being discussed in detail below) can be supplemented to the multiple ink tanks 21 being fixed in chest portion 11. Opening and closing lid portion 15 is provided with window portion 15w, and above-mentioned window portion 15w is used to make it possible in the state of opening and closing lid portion 15 is closed from outer Portion carries out observation confirmation to each ink tank 21.Window portion 15w is provided with transparent resin plate.Even in the closing of opening and closing lid portion 15 Under state, user can also observe the surplus for confirming the ink in each ink tank 21 by window portion 15w.

Providing ink portion 20 (Fig. 1) is an embodiment of the fluid Supplying apparatus in the utility model, and to printing The supply ink of print head 33 in portion 30.Providing ink portion 20 has multiple ink tanks 21 and ink flow path portion 22.Multiple ink tanks 21 be hollow container, and the ink of different colours is housed respectively.Each ink tank 21 opening and closing lid portion 15 rear side along arrow X's Direction is arranged in a row.In the present embodiment, ink tank 21 corresponding with cyan, magenta, yellow, four kinds of colors of black Arranged according to the order.It should illustrate, it is contemplated that the ink tank 21 that consumption is more than other black inks can be received with increasing The mode of the quantity of ink of appearance, makes width in the direction of arrowx be more than other ink tanks 21.Ink tank 21 is equivalent to this practicality The subordinate concept of liquid container in new.Structure on ink tank 21 is discussed below.

Ink flow path portion 22 is formed in the supply line of the ink between the print head 33 in Printing Department 30 and ink tank 21. Subordinate concept of the ink flow path portion 22 equivalent to the liquid flow path portion in the utility model.Ink flow path portion 22 has multiple pipelines 23rd, multiple valves 24 and multiple ink storing sections 25.Pipeline 23 is the resinous tube parts with pliability.Pipeline 23 with it is each Ink tank 21 is connected one by one.

Valve 24 is provided with one by one in each pipeline 23.Valve 24 is can for example lead to by the way that the open and close valve of operation is opened and closed manually Cross gate valve or ball valve is constituted.In ink flow path portion 22, by shutoff valve 24, it can block between ink tank 21 and print head 33 Ink flowing.In the present embodiment, valve 24 is installed in the way of pipeline 23, as the joint component of connecting pipe 23 Play a role.Subordinate concept of the valve 24 equivalent to the stream valve in the utility model.The quilt generally when using printer 10 of valve 24 Be set to open mode, carry printer 10 when etc. be set to off closed state.Discussed on the function of valve 24 below.

Each pipeline 23 is connected with the ink storing section 25 of corresponding color.Ink storing section 25 is in the storage of the leading portion of print head 33 Stay the resinous hollow part of ink.The inner space of ink storing section 25 is equivalent to the fluid retention room in the utility model Subordinate concept.Ink storing section 25 is equipped on the bracket 32 of Printing Department 30 together with print head 33.Before ink storing section 25 Section is provided with the suction pump for being used for aspirating the ink of ink tank 21 to ink storing section 25, but omits its diagram with describing in detail.

Here, ink flow path portion 22 is constituted in the way of with following pressure-resistant performance：At least in ink flow path portion 22 Untill the pressure in portion reaches more than the critical pressure specified, will not occur pipeline 23 and come off etc. that ink will be caused to External leakage Undesirable condition.In the present embodiment, the critical pressure specified is 20kPa.Critical pressure and use on ink flow path portion 22 Will be rear in the detailed content for suppressing pressure-resistance structure of the ink leakage untill reaching the critical pressure in ink flow path portion 22 Discuss in face.

Printing Department 30 is outside above-mentioned print head 33, also with control unit 31, bracket 32, with using paper feeding mechanism 35.Control Portion 31 processed is made up of the microcomputer with such as central processing unit and main storage means, and central processing unit passes through respectively The program planted is read in main storage means and performed, to play various functions.In printer 10, in the control of control unit 31 Under, carry out printing treatment or various maintenances processing.

Bracket 32 is set in the way of it can be moved back and forth on the transport path in printing PP along main scanning direction. Print head 33 is installed below bracket 32, above-mentioned ink flow path portion 22 is arranged with along main scanning direction in the upside of bracket 32 Ink storing section 25.Print head 33 is connected with ink storing section 25 by pipeline (omit and illustrate).Sketch map (is saved by pulley Show) from engine (omitting diagram) transmission driving force, bracket 32 is in the track 32r being set up on printing PP transport path On move back and forth.

Print head 33 has the nozzle for spraying ink, and the printing surface of from the printing PP to conveying sprays ink droplet.Print Subordinate concept of the brush 33 equivalent to the fluid jetting head in the utility model.Can be by the rotation of conveying roller with paper feeding mechanism 35 Turn drives edge sub-scanning direction conveying printing PP.When being printed, control unit 31 is using paper feeding mechanism 35 to paper Outlet 12 is with specified transporting velocity conveying printing PP.Also, print head 33 is moved back and forth on main scanning direction, And according to the time determined based on printed data, ink droplet is sprayed from the nozzle of print head 33 to printing PP printing surface.

[structure of ink tank]

Fig. 3 is the exploded perspective schematic diagram for representing ink tank 21.In figure 3, arrow X, Y, Z is with ink tank 21 is fixed Illustrated in the corresponding mode of configuration posture of the printer 10 of usual posture.Ink tank 21 has 6 faces 41~46.The 1 face 41 is formed in bottom surface sections when being fixed on printer 10 downward.2nd face 42 is constituted with the 1st face 41 relatively, and Upper surface part upward.3rd face 43 is constituted to intersect with the face 42 of the 1st face the 41 and the 2nd, is being configured at printer 10 just Surface side, and the face portion relative with opening and closing lid portion 15.4th face 44 is constituted to intersect with the face 42 of the 1st face the 41 and the 2nd, and court To the back part with the 3rd facial 43 opposite directions.5th face 45 is constituted to intersect with above-mentioned 4 faces 41~44 respectively, and Just to left side face when the 3 the facial 43rd positioned at left side.6th face 46 is constituted to intersect with above-mentioned 4 faces 41~44 respectively, and The right side on right side when just to the 5 the facial 45th positioned at the opposite side of the 5th face 45 is facial.In this manual, " face " It can be not formed as plane, be formed as curved, it is possible to have recess or convex portion, poor tomography, groove, flexing portion, inclined plane Deng.In addition, two facial " intersections " mean any one following state：State that two faces mutually actually intersect, The state that the state and two facial elongated surfaces that one facial elongated surfaces is intersected with another face are intersected.Therefore, exist Inclined plane of composition flexure plane etc. also may be present between adjacent each face.

Ink tank 21 has box body component 50 and sheet material 51.Box body component 50 is the main part of composition ink tank 21 Resinous hollow box body.Box body component 50 is made up of the injection moulding of synthetic resin such as nylon and polypropylene.Box body 5th facial 45 side of the part 50 almost overall opposite direction to arrow X direction, and it is empty to surround the inside of box body component 50 Between each outside wall portions constitute 5 faces 41~44,46 in addition to the 5th face 45.

Sheet material 51 is the part of the film-form with pliability, and it is with the seal box body component 50 the 5th facial 45 side The overall mode in opening portion engage, constitute the 5th face 45 of ink tank 21.Sheet material 51 is by such as nylon or polypropylene The thin film component of synthetic resin formation is constituted.Sheet material 51 is engaged with respect to box body component 50 for example, by cladding.

Ink injection unit 53 and atmospheric air chamber resettlement section 54 are provided with the 2nd face 42 of ink tank 21.Ink injection unit 53 is set The 4th facial 44 side being located in the 3rd facial 43 side, atmospheric air chamber resettlement section 54 in the 2nd face 42.Ink injection unit 53 has and ink The ink inlet 53h of the inside connection of water pot 21.User can be mended by ink injection unit 53 to the inside of ink tank 21 Fill ink.In the present embodiment, ink injection unit 53 is constituted as the position of tubular prominent upward.Ink inlet Subordinate concepts of the 53h equivalent to the liquid injection port in the utility model.

Ink injection unit 53 is provided with cover 55 in the way of it can load and unload, and above-mentioned cover 55 is used to airtightly seal Ink inlet 53h.Cover 55 is usually the state for being installed on ink injection unit 53, and when supplementing ink to ink tank 21 It is removed.Subordinate concept of the cover 55 equivalent to the seal member in the utility model.In the present embodiment, cover 55 It is made up of the resin component with pliability.The main part 55b of cover 55 is formed as bottomed cylindrical, and with the cylinder The mode that inner peripheral surface is airtightly close to the outer peripheral face of the upper end of ink injection unit 53 is embedded into.

Cover 55 at least corresponds to ink for maintenance ink inlet 53h sealing state until being produced in ink tank 21 Structure untill the pressure of the critical pressure of flow path portion 22.In the present embodiment, noted to improve cover 55 relative to ink Enter the close property in portion 53, the internal diameter in tubular position by adjusting cover 55 with it is outer in the upper end of ink injection unit 53 Footpath ensures such pressure-resistant performance.The reasons why on ensuring such pressure-resistant performance, is discussed below.

Atmospheric air chamber resettlement section 54 is the rear side in ink injection unit 53 with the approximately parallelepiped body shape of stepped protrusion Empty position.The path of flow of ambient air is provided with the inside of atmospheric air chamber resettlement section 54 or (is discussed below for the atmospheric air chamber for storing air State).Air introduction portion 56 is provided with the upper end of atmospheric air chamber resettlement section 54.Air introduction portion 56 has and atmospheric air chamber resettlement section 54 The air intake 56h of inside connection.In ink tank 21, as the ink in ink tank 21 is consumed, air is by by big The air intake 56h of gas introduction part 56 is imported into ink tank 21.

In the present embodiment, air intake 56h is provided with sealing valve 57.Sealing valve 57 by can be by entering manually The valve of row opening and closing operations is constituted.Sealing valve 57 is made up of such as gate valve or ball valve.When opening sealing valve 57, it is allowed to which air passes through Air intake 56h flows into ink tank 21.On the other hand, close sealing valve 57 when, limit ink from air intake 56h to Outside outflow.Sealing valve 57 is generally opened when using printer 10, is closed when carrying printer 10 by the operation of user Close.In the present embodiment, sealing valve 57 goes out the subordinate concept of limiting unit equivalent to the liquid flow in the utility model.

The upper limit of ink level in inside of the wall provided with expression ink tank 21 of the 3rd face 43 of ink tank 21 Put and lower position two mark parts 58a, 58b.Mark part 58a, 58b are located at the position that can be confirmed from window portion 15w Put (Fig. 1), above-mentioned window portion 15w is located at the opening and closing lid portion 15 of chest portion 11.In ink tank 21, the outer of the 3rd face 43 is constituted Wall portion is constituted in translucent mode, and can from external observation confirmation inside ink liquid level.User is by the 3rd face 43 Mark part 58a, 58b as mark, the ink replenishing operation to ink tank 21 can be carried out.

Reference picture 4, is illustrated to an example of the internal structure of ink tank 21.Fig. 4 be box body component 50 with it is thin The schematic cross-section of ink tank 21 in the composition surface of chip part 51.In Fig. 4 ink storage portion is reserving at exemplified with ink IK 60 state.In Fig. 4, the flowing of ink IK when being supplemented from from ink injection unit 53 to ink storage portion 60 is by dashdotted arrow Head is represented.In addition, the flowing of the air imported from air introduction portion 56 to ink storage portion 60 by the arrow of double dot dash line Lai Represent.In addition, in Fig. 4, arrow X, Y, Z are represented in mode corresponding with Fig. 3.

In the inside of ink tank 21, multiple regions are divided into by the inner wall section of box body component 50, and form ink collecting Portion 60 and air flow path portion 61.Ink storage portion 60 is in the downside shape of ink tank 21 for that can house the hollow part of ink Into the space with maximum volume.Ink storage portion 60 is general equivalent to the bottom of the liquid storage portion in the utility model Read.Upper ends of the ink inlet 53h of above-mentioned ink injection unit 53 directly with ink storage portion 60 is connected.In addition, being received in ink In appearance portion 60, user faces the 3rd face 43, can be the ink IK's during the observation of the 3rd face 43 confirms ink storage portion 60 The position of liquid level.

Ink outlet portion 62 is provided with the lower section of ink storage portion 60.Ink outlet portion 62 has to be connected with ink storage portion 60 The inner space connect, meanwhile, also serve as position prominent downwards in the 1st face 41 of ink tank 21 and set.Ink Export department 62 has pipe connection portion 62c.Pipe connection portion 62c is cylindric pipe arrangement position.The pipeline in ink flow path portion 22 23 are connected with pipe connection portion 62c.The ink IK of ink storage portion 60 is supplied by the ink of the outlet as pipe connection portion 62c Supplied to mouth 62h to print head 33.Subordinate concepts of the ink supply port 62h equivalent to the liquid supply port in the utility model.

Air flow path portion 61 is as to connect big conductance in the way of the air of outside can be imported to ink storage portion 60 The position for entering the stream of the air of portion 56 and ink storage portion 60 and playing a role.Air flow path portion 61 has multiple ambient air passages Portion 63 and multiple air storing sections 64.

Ambient air passage portion 63 is the groove for the inner wall part for being formed from box body component 50, and passes through the surface of sheet material 51 By path formed by groove covering.Ambient air passage portion 63 is not to interfere the stream and big conductance of the ink in ink injection unit 53 Enter the mode of the stream of air in portion 56, located at than ink injection unit 53 and air introduction portion 56 closer to the 5th face 45 Side.

In the present embodiment, ambient air passage portion 63 is with throughout the whole region of the rear side of ink storage portion 60 and structure Into, meanwhile, to be constituted throughout the whole region of the top of ink storage portion 60.In addition, ambient air passage portion 63 is with to arrow The mode of a plurality of trip path that head Y direction or arrow Z direction are turned back and constitute.Because ambient air passage portion 63 has so Trip path, even in printer 10 from usual posture be changed into it is inclined configuration posture in the case of, can also suppress ink The ink IK of resettlement section 60 reaches air introduction portion 56 by ambient air passage portion 63 and leaks into outside.In addition, ink can be suppressed The ink IK of resettlement section 60 is evaporated by air flow path portion 61.

Air storing section 64 is that can store the space for the ink IK for flowing into ambient air passage portion 63.Air storing section 64 is formed In the upper area of ink storage portion 60 in the way in ambient air passage portion 63 or between air introduction portion 56 and ambient air passage portion 63. By that provided with air storing section 64, the ink in inflow ambient air passage portion 63 can be made to be reserving at air storing section 64, therefore can enter One step suppresses to come from the ink IK in air introduction portion 56 leakage.

[being used for the structure for suppressing the leakage of ink]

Fig. 5 extracts the supply line of the ink IK between ink tank 21 and print head 33 in printer 10 for expression Ideograph.As described above, when carrying printer 10 etc., the ink injection unit 53 of ink tank 21 is covered part 55 and sealed, and closes Close the sealing valve 57 in air introduction portion 56.Therefore, it is placed in even in by printer 10 from the inclined configuration posture of usual posture In the case of, it can also suppress ink and be leaked from the ink inlet 53h or air intake 56h of ink tank 21.

In addition, in the printer 10 of present embodiment, when carrying printer 10, closing located at ink flow path portion 22 The valve 24 of pipeline 23.In the state of by cover 55 and sealing valve 57, ink tank 21 is sealed, if printer 10 removed Height above sea level is higher compared with being transported to the condition of the use environment assumed when in factory shipment and place that air pressure is significant lower or temperature Significantly higher place etc., the then air existed in ink tank 21 is expanded, and the ink IK in ink tank 21 is by pipeline 23 The situation of extrusion.Even if in this case, by shutoff valve 24, such ink IK can be suppressed by the downstream of valve 24 Print head 33 is extruded.Therefore, ink IK can be suppressed from the nozzle leakage of print head 33.

Here, in the printer 10 of present embodiment, ink tank 21 is connected with print head 33 by ink flow path portion 22. Also, ink flow path portion 22 is constituted in the way of with following pressure-resistant performance：It is at least critical until being produced in the stream of ink Untill the pressure of pressure, ink will not be leaked.More specifically, connecting portion 71, valve 24 in pipeline 23 and ink tank 21 In the connecting portion 72 or valve 24 and the connecting portion of ink storing section 25 73 of pipeline 23, even if to produce critical pressure in pipeline 23 Power, the mode that pipeline 23 will not also be fallen off is constituted.In the present embodiment, the pressure-resistant performance as ensuring determines pipe Length of connecting portion of the internal diameter in road 23 and the external diameter of the connecting portion in insertion pipeline 23 and insertion pipeline 23 etc..Should Explanation is given, in the connecting portion 71~73 of pipeline 23, in order to ensure such resistance to pressure, can be installed in connecting portion from outside The part of pipeline 23 is crimped, pipeline 23 each connecting portion can also be bonded in.

In this way, in the printer 10 of present embodiment, can ensure in ink flow path portion 22 up to critical pressure Resistance to pressure.Therefore, the situation in the environment of printer 10 to be placed in the pressure rise in ink flow path as described above Under, it can also suppress pipeline 23 in the connecting portion 71~73 of pipeline 23 and come off and ink IK leakages.It should illustrate, in ink flow path In portion 22, in the case where the joint component beyond valve 24 is in the way of pipeline 23, even in pipeline 23 and the joint component Connecting portion it is also preferred that ensure until critical pressure resistance to pressure.

Further, in the printer 10 of present embodiment, even if as described above, cover 55 is with production in ink tank 21 The pressure of raw critical pressure is also constituted in the way of it will not be come off from air introduction portion 56.It therefore, it can following manner to suppress to come From the ink IK of ink tank 21 leakage.

Fig. 6 for represent by printer 10 be set to from usual posture inverted after posture when ink tank 21 state Ideograph.When carrying printer 10, it is set as rotating from usual posture as shown in fig. 6, having printer 10, or even on The situation of the configuration posture (hreinafter referred to as " reversion posture ") of lower reversion.Even if such configuration posture is set as, in ink In tank 21, it can also suppress the leakage of the ink IK from ink inlet 53h by cover 55, meanwhile, sealing valve can be passed through 57 suppress the leakage of the ink IK from air intake 56h.

In addition, when constant, the ring that the air that printer 10 is carried in ink tank 21 is expanded with such posture When under border, because shutoff valve 24, the pressure in ink tank 21 rises.Even if in this case, if this embodiment party The printer 10 of formula, can suppress coming off untill at least critical pressure for cover 55.Therefore, it can suppress because of ink tank 21 The rising of interior pressure and cause cover 55 to come off, and then ink from ink inlet 53h leak.

Fig. 7 is for illustrating ink flow path portion 22 and the explanation figure of the critical pressure of cover 55.Expression is illustrated in Fig. 7 Relative elevation and environment temperature, pressure in the ink flow path of printer 10 table.Generally, if printer be carried to Compared with the condition of the use environment assumed when it is manufactured or during factory shipment the significant lower place of air pressure or temperature substantially compared with High place, then due to the expansion of the air in the ink flow path in printer, have what the pressure in ink flow path rose Situation.It based on that will be assumed in height above sea level 0m and temperature is that the printer used in the environment of 25 DEG C is carried to that Fig. 7 table, which is, The measured value of pressure during the temperature place different with height above sea level in ink flow path and be made.In a table in fig. 7, " A " is represented Pressure in the stream of ink in printer 10 is in below 20kPa, and " B " shows the pressure in the stream of the ink in printer 10 Power is more than 20kPa.

As described above, being 20kPa by controlling board critical pressure setting in the present embodiment.Therefore, it is possible to press down in a case where System comes from the leakage of ink tank 21 or the ink in ink flow path portion 22：If if temperature be 20 DEG C if until height above sea level 2000m, Temperature be 25~30 DEG C then until height above sea level 1500m, if temperature is 35 DEG C until if height above sea level 1000m, temperature are 40~45 DEG C then until height above sea level 500m.On the contrary, can also suppress to come from ink tank 21 or ink flow path portion 22 in a case where The leakage of ink：If height above sea level 0m then until temperature 50 C, if below height above sea level 500m then until temperature 45 C, if Below height above sea level 1000m then until 35 DEG C of temperature, if below height above sea level 1500m then until 30 DEG C of temperature, if height above sea level 2000m Below then until 20 DEG C of temperature.

Such as with upper type, according to the printer 10 of present embodiment, by the way that cover 55 and sealing valve 57 are installed on into ink Water pot 21, even if printer 10 is set as in the case of the postrotational posture of usual posture, can also suppressing to come from ink tank The leakage of 21 ink.In addition, by the way that valve 24 is located at into ink flow path portion 22, the supply of ink when printer 10 is carried In the case of pressure rising is produced in stream, it can also suppress ink by the nozzle extrusion from print head 33.In addition, with ink The connection status of pipeline 23 in flow path portion 22 and the sealing state of the formation of cover 55 in ink tank 21 are can bear The mode that pressure untill at least critical pressure rises is constituted.Therefore, sent out when printer 10 is positioned in ink flow path When in the environment of raw pressure rising, pipeline 23 or cover 55 can be suppressed and come off to cause ink to be let out from defined installation site Leakage.Furthermore it is possible to realize various effects illustrated in the above-described embodiment.

B. second embodiment：

Reference picture 8, Fig. 9, to the ink injection unit 53B's in second embodiment of the present utility model and cover 55B Structure is illustrated.Fig. 8 is schematically expression schematic diagrames of the cover 55B from the ink injection unit 53B states removed.Fig. 9 For the ink injection unit 53B and cover 55B schematic cross-section shown in Fig. 8 in A-A cut-outs.In fig .9 exemplified with lid Part 55B is installed on ink injection unit 53B state.The structure of printer in second embodiment is except ink injection unit Beyond 53B is different from cover 55B structure, the structure with the printer 10 in first embodiment is essentially identical.

In the printer of second embodiment, cover 55B with respect to ink tank 21 ink injection unit 53B with screw-type It is fixed.Ink injection unit 53B prominent upward outside wall surface, which is formed with, in the 2nd face 42 helically repeatedly surrounds ink The ridge 75 (Fig. 8, Fig. 9) of injection unit 53B periphery rotation.In addition, the internal face of the main part 55b in cover 55B It is formed with thread groove 76 (Fig. 9) corresponding with the ridge 75.If the cover 55B of second embodiment, by using The rotation process of person, easily can be loaded and unloaded with respect to ink injection unit 53B, meanwhile, it is capable to ensured by easy structure until Resistance to pressure untill critical pressure.It should illustrate, in ink injection unit 53B and cover 55B, ridge 75 can also be formed In cover 55B inner peripheral surface, and thread groove 76 is formed at ink injection unit 53B outer peripheral face.In addition, implementing if second The printer of mode, can play various action effects illustrated in the first embodiment.

C. the 3rd embodiment：

Figure 10 is the schematic diagram for the structure for representing the air introduction portion 56C in the 3rd embodiment of the present utility model. The state for the circulation for allowing air in air introduction portion 56C is illustrated in Figure 10 epimere, is illustrated in Figure 10 hypomere The state of the outflow of limit ink in air introduction portion 56C.The structure of printer in 3rd embodiment is except ink The air introduction portion 56C of tank 21 is not installed with sealing valve 57, but in the outflow of air introduction portion 56C itself formation limit inks Valve arrangement this point beyond, the printer with first embodiment is essentially identical.

In air introduction portion, 56C is provided with the valve arrangement for the lifting valve type for using gravity to opening and closing.Valve body 78 is installed on big Opening portion 56i in gas introduction part 56C ink tank 21.Valve body 78 has main part 78a and support 78b.The master of valve body 78 Body portion 78a is configured at opening portion 56i downside, for the discoid position with the size that can seal opening portion 56i.Supporting Portion 78b is the bar-shaped position extended out of main part 78a mediad air introduction portion 56C opening portion 56i.

When printer is in usual posture, the position that diameter locally increases in the support 78b of valve body 78 upper end Stopped (Figure 10 epimere) by hanging on the engaging portion 79 being located in air introduction portion 56C stream.Thus, main part 78a is fixed on the position of the open end away from air introduction portion 56C.Therefore, air introduction portion 56C formation open state, can Air is allowed to be circulated by air introduction portion 56C to ink tank 21.

On the other hand, when printer is rotated from usual posture, and when being set as reversion posture, the main part of valve body 78 78a position is moved due to gravity to air introduction portion 56C sides, and air introduction portion 56C opening portion 56i is blocked up by main part 78a Fill in (Figure 10 hypomere).Therefore, air introduction portion 56C formation closed mode, ink that can be in limit ink tank 21 passes through air Introduction part 56C is flowed out in outside.In the third embodiment, air introduction portion 56C valve body 78 is equivalent in the utility model Liquid flow go out the subordinate concept of limiting unit.

As described above, if the air introduction portion 56C in the 3rd embodiment, then air introduction portion 56C is will printing Machine is set to close automatically due to the effect of gravity during reversion posture, so as to suppress the outflow of ink.In the upper of such as ink tank 21 In the situation of lower direction reversion, it further can positively suppress ink and be leaked by air introduction portion 56C from ink tank 21.This Outside, if the printer of the 3rd embodiment, a variety of effects illustrated in first embodiment can be played.

D. the 4th embodiment：

Figure 11 is the schematic diagram for the structure for representing the air introduction portion 56D in the 3rd embodiment of the present utility model. Figure 11 epimere schematically illustrates the state of the air introduction portion 56D under usual posture.In Figure 11 hypomere model utility Ground illustrates the state of the air introduction portion 56D under reversion posture.The structure of printer in 4th embodiment except The air introduction portion 56D of ink tank 21 is not installed with sealing valve 57, but air introduction portion 56D be provided with film member 80 this Beyond point, the printer with first embodiment is essentially identical.

In air introduction portion 56D in the 4th embodiment, the opening portion 56i in ink tank 21 is blocked up by film member 80 Plug.Film member 80 is formed by the part with following property：Air is allowed to be circulated to thickness direction, but the stream of limitation liquid It is logical.Film member 80 is for example, the part for having moisture-permeability by go ア テ ッ Network ス (registration mark) etc. is constituted.Or, it is membranaceous Part 80 can be also made up of gas-liquid separation membrane.In the 4th embodiment, film member 80 is equivalent to the liquid in the utility model Body flows out the subordinate concept of limiting unit.If the air introduction portion 56D of the 4th embodiment, then without using switching mechanism, While flow of ambient air is allowed, it is capable of the outflow of limit ink.Therefore, ink can more reliably be suppressed by simple structure Water is leaked by air introduction portion 56D from ink tank 21, thus efficiency is higher.It should illustrate, film member 80 can also be installed Air intake 56h in the opening portion as the outside that ink tank 21 is located in air introduction portion 56D, can also be filled in big Gas introduction part 56D inside.In addition, if the printer of the 4th embodiment, then institute in first embodiment can be played The various action effects illustrated.

E. the 5th embodiment：

Figure 12 extracts the ink between ink tank 21 and print head 33 in the printer 10E of the 5th embodiment for expression The ideograph of water IK supply line.The printer 10E of 5th embodiment structure is stored except omitting valve 24 in ink Portion 25E leading portion is set beyond this point of valve chamber 81, and the printer 10 with first embodiment is essentially identical.As described below, exist In the printer 10E of 5th embodiment, by the valve system located at ink storing section 25E and valve chamber 81, in ink storing section Beyond during 25E ink cartridge low, circulation of the ink to ink storing section 25E can be blocked.

Figure 13 is the valve chamber 81 and the schematic diagram of ink storing section 25E structure in the 5th embodiment of expression.In Figure 13 Paper epimere illustrate the state of the stream closed between valve chamber 81 and ink storing section 25E, in Figure 13 paper hypomere figure The state for opening the stream between valve chamber 81 and ink storing section 25E is shown.

Pipeline 23 is connected in the way of the ink IK of ink tank 21 can be flowed into valve chamber 81.In addition, opening portion 82 is with valve The mode that the ink IK of room 81 can flow into ink storing section 25E is located between valve chamber 81 and ink storing section 25E.Ink is stored Portion 25E is connected in the way of can ink IK be supplied to print head 33 by pipeline 26 with print head 33.

Valve body 83 is by can be from valve chamber 81 towards being arranged at valve in the way of moving back and forth on ink storing section 25E direction Opening portion 82 between room 81 and ink storing section 25E.Valve body 83 has main part 83a and axle portion 83b.Main part 83a is tool There is the substantially discoid position for the size for being capable of occlusion of openings portion 82, so that valve chamber can be configured in the way of occlusion of openings portion 82 In 81.Axle portion 83b is the position of the shaft-like extended from main part 83a center by opening portion 82 into ink storing section 25E.

Edge part in opening portion 82 is provided with the seal member 84 of annular shape, and above-mentioned seal member 84 is used as stop valve body 83 main part 83a valve seat and play a role.Further, spring members 85 with the main part 83a to valve body 83 to opening The mode that portion 82 exerts a force is configured at valve chamber 81.

In the ink storing section 25E of the 5th embodiment, the wall portion in opposed open portion 82 is by the film with pliability Part 86 is formed.The axle portion 83b of valve body 83 links with the central portion of thin film component 86.Thin film component 86 is with the main body of valve body 83 Portion 83a is constituted by way of being bent in the state of the occlusion of openings portion 82 of seal member 84.

Valve chamber 81 and ink storing section 25E is full of in ink IK and ink storing section 25E is in the barotropic state specified When, the main part 83a of valve body 83 due to the force by spring members 85 and ink IK pressure and pushed to seal member 84 (Figure 13 epimere).I.e., in this condition, because the main part 83a of valve body 83 is by the force of spring and valve chamber 81 The external force Fa of ink IK pressure synthesis, blocks the opening portion 82 of the entrance as ink storing section 25E.

When being printed, because ink storing section 25E ink IK sprays from print head 33 and consumes reduction, ink Pressure reduction in storing section 25E.When ink storing section 25E ink IK is consumed and when being changed into negative pressure, the quilt of thin film component 86 It is drawn to ink storing section 25E inner space.If the negative pressure in ink storing section 25E becomes big, thin film component 86 is drawn to Ink storing section 25E power Fb also increases.The power Fb main part 83a for going above the valve body 83 in valve chamber 81 be subject to it is outer During power Fa, main part 83a biasing springs part 85 and to the side of valve chamber 81 move (Figure 13 hypomere).Thus, valve body 83 can be released The sealing state of caused opening portion 82, the ink IK of valve chamber 81 flows into ink storing section 25E by opening portion 82.Work as specified amount Ink IK flow into ink storing section 25E, when returning to the barotropic state specified in ink storing section 25E, due to spring members 85 force, valve body 83 is urged towards seal member 84 again, so that occlusion of openings portion 82 (Figure 13 epimere).

As described above, in the printer 10E of the 5th embodiment, the ink IK removed in ink storing section 25E is not enough And during the state for the negative pressure for being changed into specifying in ink storing section 25E beyond, ink storing section 25E is closed.Therefore, i.e., Make the pressure increase in ink storing section 25E upstream side ink IK, the ink IK that can also suppress unnecessary flows into ink storing section 25E.Therefore, carry printer 10E when etc., the supply line that can suppress ink IK from ink IK is extruded to print head 33, Leaked so as to suppress ink IK from print head 33.In addition, according to the printer 10E of the 5th embodiment, first can be played Illustrated various action effects in embodiment.

F. variation：

F1. variation 1：

The structure of the structure illustrated in the respective embodiments described above or the variation in following explanation can be appropriately combined.For example, Also the ink injection unit 53B of above-mentioned second embodiment and cover 55B structure can be applied to the 3rd embodiment or the Ink tank 21 in four embodiments, the 5th embodiment.In addition, also can be by the air introduction portion 56C's of the 3rd embodiment Structure is applied to the ink tank 21 of the 4th embodiment or the 5th embodiment, also can be by the film member 80 of the 4th embodiment It is used in combination with the air introduction portion 56C of the embodiment of sealing valve 57 or the 3rd of first embodiment structure.In addition, the 5th implements It is any into the 4th embodiment that the ink storing section 25E of mode and the structure of valve chamber 81 are equally applicable to first embodiment Printer in one.

F2. variation 2：

Valve 24 or sealing valve 57 in above-mentioned first embodiment by being opened and closed manually.It is relative in this, it is used as valve 24 or sealing Valve 57 can also use the valve that electromagnetic switch driving is carried out by solenoid or various actuators.In this case, also can be with By the control of control unit 31, the mode of shutoff valve 24 or sealing valve 57 before the power supply of such as printer 10 is changed into dissengaged positions It is driven.

F3. variation 3：

In above-mentioned first embodiment and second embodiment, sealing ink inlet 53h cover 55,55B tools There is the cylindric position installed in the way of covering ink injection unit 53,53B upper end.It is relative in this, cover 55, 55B can also have other shapes.Ink inlet 53h can also for example, by insert ink inlet 53h columned portion Part is sealed.In addition, in the first embodiment, can also be in the outer of cover 55 in order to ensure the resistance to pressure of critical pressure The part of annular is installed, the part of above-mentioned annular can make cover 55 be crimped on the periphery of ink injection unit 53 week.

F4. variation 4：

In the respective embodiments described above, facing the installment state of the pipeline 23 for maintaining ink flow path portion 22 or cover 55 Boundary's pressure is set as 20kPa, but critical pressure is not limited to 20kPa.Critical pressure preferably considers to assume to use printer 10 Environmental condition etc. and suitably set.Therefore, critical pressure can also be set greater than 20kPa value or the value less than 20kPa. It should illustrate, ink flow path portion 22 can have mutually different critical pressure with cover 55.As long as the critical pressure of cover 55 Power is at least more than the critical pressure in ink flow path portion 22.

F5. variation 5：

The structure of ink tank 21 is not limited to structure illustrated in above-mentioned first embodiment.For example, ink tank 21 Can without sheet material 51 to be engaged in the structure of box body component 50, can also as whole it is facial it is integrally formed in Empty container and constitute.In addition, in ink tank 21, the ambient air passage portion 63 in air flow path portion 61 or big gas-reservoir can also be omitted Stay portion 64.In addition, in ink tank 21, mark part 58a, 58b can also be omitted.

F6. variation 6：

In the respective embodiments described above, ink tank 21 is contained in the chest portion 11 of printer.On the other hand, ink tank 21 The unit box body separated with printer main body can also be contained in.In addition, in the respective embodiments described above, printing can also be omitted The opening and closing lid portion 15 of the chest portion 11 of machine.Ink tank 21 can also be the state for being always exposed to outside.

The utility model is not limited to above-mentioned embodiment or embodiment, variation, is not departing from the model of its purport It can be realized in enclosing by various structures.For example, with the technology in each embodiment described in the content bar of utility model Technical characteristic in the corresponding embodiment of feature, embodiment, variation, a part or complete in order to solve the above-mentioned technical problem Portion, or in order to realize above-mentioned technique effect part or all, suitably can be replaced or combine.If in addition, Its technical characteristic is illustrated not as necessary feature in this specification, can suitably be deleted.

Symbol description

10th, 10E ... printers, 11 ... chest portions, 12 ... use paper outlet, 13 ... interface portions, 13b ... operation buttons, 13s ... display parts, 15 ... opening and closing lid portion, 15h ... linkages, 15w ... window portions, 20 ... providing ink portions, 21 ... ink tanks, 22 ... ink flow path portions, 23 ... pipelines, 24 ... valves, 25,25E ... ink storing sections, 26 ... pipelines, 30 ... Printing Departments, 31 ... controls Portion processed, 32 ... brackets, 33 ... print heads, 35 ... use paper feeding mechanism, 41~46 ... faces, 50 ... box body components, 51 ... thin slices Part, 53 ... ink injection units, 53h ... ink inlets, 54 ... atmospheric air chamber resettlement sections, 55,55B ... covers, 55b ... main bodys Portion, 56,56C, 56D ... air introduction portion, 56h ... air intakes, 56i ... opening portions, 57 ... sealing valves, 58a, 58b ... mark Knowledge portion, 60 ... ink storage portions, 61 ... air flow path portions, 62 ... ink outlet portions, 62h ... ink supply ports, 63 ... air lead to Road portion, 64 ... air storing sections, 71~73 ... connecting portions, 75 ... ridges, 76 ... thread grooves, 78 ... valve bodies, 78a ... main bodys Portion, 78b ... supports, 79 ... engaging portions, 80 ... film members, 81 ... valve chambers, 82 ... opening portions, 83 ... valve bodies, 83a ... main bodys Portion, 83b ... axle portions, 84 ... seal members, 85 ... spring members, 86 ... thin film components.

Claims (8)

1. a kind of fluid Supplying apparatus, it has：

Liquid container；And

Liquid flow path portion,

The liquid container has：

Liquid storage portion, the liquid storage portion can house supply to the liquid of fluid jetting head；

Air introduction portion, the air introduction portion can import air to the liquid storage portion；

Liquid injection port, the liquid injection port can inject the liquid to the liquid storage portion；And

Liquid supply port, the liquid supply port makes the liquid be flowed out from the liquid storage portion to the fluid jetting head,

The liquid flow path portion is formed in the supply line of the liquid between the liquid container and the fluid jetting head,

The liquid flow that there is the limitation liquid to be flowed out from the liquid storage portion in the air introduction portion goes out limiting unit,

The seal member for sealing the liquid injection port is releasably installed on the liquid injection port,

The liquid flow path portion, which has, can be opened and closed the stream valve of the supply line,

The seal member is to maintain the sealing state of the liquid injection port until the pressure of the inside of the liquid storage portion Mode untill reaching the pressure specified is constituted,

The pressure specified is pressure more than critical pressure, and the critical pressure is that the liquid can be from the supply stream The minimum pressure that road is leaked.

2. fluid Supplying apparatus as claimed in claim 1, wherein,

The critical pressure is 20kPa,

The seal member is at least to maintain the sealing state of the liquid injection port until the inside of the liquid storage portion Mode untill pressure reaches 20kPa is installed on the liquid injection port.

3. fluid Supplying apparatus as claimed in claim 1 or 2, wherein,

The seal member is installed on the liquid injection port by screw-type.

4. fluid Supplying apparatus as claimed in claim 1 or 2, wherein,

The liquid flow goes out limiting unit by allowing the air internally to circulate but limiting the part that the liquid internally circulates Constitute.

5. fluid Supplying apparatus as claimed in claim 1 or 2, wherein,

The liquid flow path portion includes：

Multiple tube parts, the liquid can circulate in the tube parts；And

Joint component, the joint component makes the tube parts be connected to each other,

The joint component and the tube parts untill the critical pressure is reached will not at least release mutual connection Mode constitute.

6. fluid Supplying apparatus as claimed in claim 1 or 2, wherein,

The liquid flow path portion, which is included in, can store the fluid retention room of the liquid in the leading portion of the fluid jetting head,

The stream valve is located at the entrance of the fluid retention room.

7. fluid Supplying apparatus as claimed in claim 6, wherein,

The stream valve is opened when the fluid retention room is changed into the negative pressure specified, during the negative pressure specified in pressure higher than described Close.

8. a kind of liquid injection apparatus, it has：

Fluid Supplying apparatus in claim 1 to 7 described in any one, and

The fluid jetting head.