CN200967305Y

CN200967305Y - Print cartridge

Info

Publication number: CN200967305Y
Application number: CN 200620059834
Authority: CN
Inventors: 金本友
Original assignee: Print Rite Technology Development Co Ltd of Zhuhai
Current assignee: Print Rite Technology Development Co Ltd of Zhuhai
Priority date: 2006-05-31
Filing date: 2006-05-31
Publication date: 2007-10-31
Anticipated expiration: 2016-05-31

Abstract

The utility model provides a box body, the interior of which is provided with at least an ink cavity with ink supply opening; an air bag arranged in the ink cavity is provided with an open end; an air channel which is arranged at one wall of the box body. One side of the air channel is communicated with the open end of the air bag, while the other side of the air channel is communicated with the atmosphere, wherein the air channel is provided with a check valve 1 and a check valve 2 which are reversely connected in parallel. When the check valve 1 is opened, the external air goes into the air bag through the air channel; when the check valve 2 is opened, the air in the air bag flows out through the air channel, the utility model has the advantages of stable printing performance without any residual ink.

Description

Print cartridge

" technical field "

The utility model relates to cartridge of ink-jet printer, refers in particular to the print cartridge that has air bag.

" background technology "

Ink-jet printer is a kind of reliable and efficient printing tools.Usually, ink-jet printer has an ink jet-print head that is connected with print cartridge, and its surface with respect to spray printing moves around and sprays ink droplet, and ink droplet drops forms desired image or data content on the spray printing surface.The printing effect that obtains must be kept the negative pressure of enough degree, to avoid ink from inkjet printing micropore seepage in front in the print cartridge.If but the negative pressure in the print cartridge is excessive, will offset the spray printing power of ejection ink droplet in the ink jet-print head, make the ink drop size of ejection can't keep stable or diminish gradually, cause poor print quality, when serious even ink droplet can't be sprayed fully.Therefore, print cartridge is typically provided with the negative pressure controlling organization, maintains in the exercisable scope to guarantee the negative pressure value in the print cartridge.

Above so-called negative pressure, the pressure difference value when being meant the interior pressure of print cartridge less than external air pressure.

CN2395886Y number Chinese granted patent discloses a kind of print cartridge that is used for inkjet-printing device, and it comprises the black sap cavity of a ccontaining ink, and this China ink sap cavity is provided with more than one air admission hole; China ink is provided with the more than one elastic bag that has air admission hole in the sap cavity, and the air admission hole of elastic bag is corresponding mutually with the air admission hole of black sap cavity and fix, and black sap cavity air is outward entered in the elastic bag.When inkjet-printing device is printed, when the ink in the China ink sap cavity is consumed, pressure in the China ink sap cavity reduces, ambient pressure will be entered by the air admission hole on the black sap cavity in the elastic bag that places in the black sap cavity, provide pressure with the ink in black sap cavity, make printing equipment China ink sap cavity when printing be able to stable ink supply, reach the smooth and easy effect of ink supply.In addition, by the elastic restoring force of elastic bag itself that the part air in it is extrapolated, will make the effect that produces negative pressure in the black chamber, and reach the not effect of ink leak of black sap cavity.

Above-mentioned print cartridge is directly to control negative pressure in the black sap cavity by the elasticity of air bag itself, so has following defective:

1, the operated negative pressure variation scope in the black sap cavity is minimum, require the strain strength of air bag must extremely critically grasp control, but influence because of the factors such as material, thickness, size and workmanship that are subjected to air bag, therefore the difficult control of the elastic deformation force of air bag be difficult to obtain stable print quality usually.

2, along with the continuous expansion of air bag, elastic deformability's variation of air bag is difficult to satisfy the demand of stablizing negative pressure in the black sap cavity of control.Though a plurality of elastic bags can be set, out-of-shape after air bag expands has the slit between a plurality of air bags, therefore is difficult to be full of fully whole black sap cavity, can produce the problem that ink can't be utilized fully again.

" utility model content "

The purpose of this utility model is a kind of improved print cartridge of design, can keep stable negative pressure in the print cartridge, obtains stable print quality, and can not cause the black liquid in the print cartridge residual.

For achieving the above object, the print cartridge that the utility model provides comprises: box body, inside are provided with the black sap cavity of at least one band ink supply port; Air bag is located in the black sap cavity, and it has an openend; Gas passage is located on the wall of box body, and an end communicates with the openend of air bag, and the other end communicates with atmosphere; Wherein, parallel connection oppositely is provided with check valve one and check valve two in the gas passage.

Above-mentioned print cartridge can make the stable negative pressure of maintenance in the black sap cavity by contraction, the expansion of two check valves and air bag.Because of check valve to pressure differential reacting condition sensitivity, therefore can guarantee that print quality is stable.Because of being full of whole black chamber behind the airbag aeration, therefore can not cause ink residual.

" drawing explanation "

The structural representation of Fig. 1 the utility model print cartridge.

Fig. 2 the utility model print cartridge vertical view.

Fig. 3 is the A-A cutaway view of Fig. 2.

Fig. 4 is the B-B cutaway view of Fig. 2.

Below in conjunction with diagram and specific embodiment the utility model is described further.

" specific embodiment "

In conjunction with referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, print cartridge M comprises one or six box bodys 1, and portion is divided into five black sap cavities 12 by dividing plate 11 within it, and the bottom of each black sap cavity 12 is equipped with ink outlet port 3, is provided with self-closing sealing ring 4 in the ink outlet port 3.Print cartridge M in the present embodiment is a Five-colour ink cartridge, but the utility model is not limited in this, can also be monochromatic print cartridge or Three-colour ink cartridge etc., and is corresponding, and the quantity of black sap cavity may be one, three or other numerical value in the print cartridge.

Be equipped with air bag 5 in each black sap cavity 12, it is soldered to roof 13 inner surfaces of box body 1 by openend 51.The inner space of the inner space of each air bag 5 and black sap cavity 12 all is fully isolated.In the present embodiment, air bag 5 is by there not being flexible plastic sheeting to make, but the material of making air bag is not limited to this, also can be made by resilient materials such as latexes.

Roof 13 at box body 1 is provided with five air admission holes 61, and these five air admission holes run through from roof 13, communicates with the openend 51 of air bag 5 in each black sap cavity 12 respectively.Roof 13 at box body 1 also is provided with intercommunicating pore 62, cavity 1 and cavity 2 64, wherein an end of intercommunicating pore 62 communicates with five air admission holes 61 respectively by the air slot 65 of being located at roof 13 surfaces, and the other end is communicated with the bottom of cavity 1 and cavity 2 64 respectively.Air admission hole 61, intercommunicating pore 62, air slot 65, cavity 1 and cavity 2 64 have been formed an air guide channel 6 jointly, and wherein air admission hole 61, intercommunicating pore 62, air slot 65 are by diaphragm seal sealing (not shown).

In cavity 1, be provided with check valve one 7a, in cavity 2 64, be provided with check valve two 7b.Check valve one 7a is oppositely installations in parallel with check valve two 7b, when check valve one 7a opens, outside air can flow into air bag 5 through cavity 1, intercommunicating pore 62, air slot 65, air admission hole 61, otherwise, when check valve two 7b opened, the air in the air bag 5 can flow out through air admission hole 61, air slot 65, intercommunicating pore 62, cavity 2 64.

Check valve one 7a in the present embodiment, check valve two 7b include valve gap 71, valve seat 72 and place valve gap 71 and the valve body 73 of 72 of valve seats.Valve gap 71 is provided with through hole with valve seat 72, when the periphery of valve body 73 contacts with the inner surface of valve seat 72, and closed check valve, stop gas to pass through from check valve, when the periphery of valve body 73 separated with the inner surface of valve seat 72, one-way valve opens allowed gas to pass through from check valve.Wherein, the valve seat 72 of check valve one 7a be installed in valve body 73 above, valve gap 71 be installed in valve body 73 below, the installation direction of check valve two 7b is just in time opposite with check valve one 7a.

Check valve among the utility model print cartridge M is not limited in the foregoing description, can also be membrane valve, umbrella valve etc.

Below in conjunction with Fig. 3, Fig. 4, simply introduce the negative pressure control procedure of the utility model print cartridge M.

Before print cartridge M brings into use, have only a spot of air in the air bag 5 in the black sap cavity 12, air bag 5 is compressed and fits together.After the printing beginning, the inks in the black sap cavity 12 are consumed, and pressure reduces, the space that air bag 5 begins to expand and fills black sap cavity 12 internal cause inks discharge and form.Along with the expansion of air bag 5, its internal pressure also decreases, and check valve one 7a is opened, and outside air flows into air bag 5, and the pressure in the black sap cavity 12 is restored balance, and printing is carried out reposefully.All can be full of whole black sap cavity 12 after air bag 5 in each black sap cavity 12 expands, it is residual therefore not have ink in the black sap cavity 12.

Be subjected to the interference of extraneous factor as print cartridge M, when causing black sap cavity 12 internal pressures to raise as temperature rising etc., the extruding that air bag 5 is subjected to ink begins to shrink, gas pressure raises in the air bag 2, this moment, check valve two 7b opened, air unnecessary in the air bag 5 is discharged, the gas pressure in the black sap cavity 12 is remained in the exercisable scope, prevent because of too high ink outlet port 3 ink leaks that cause of black sap cavity 12 internal pressures.

Check valve is very responsive to the variation of pressure differential, and quality is controlled easily, therefore be provided with in the other direction by the in parallel of check valve one 7a and check valve two 7b, can when the pressure in the black sap cavity 12 reduces or raise, all be adjusted timely, make print cartridge M stable performance in print procedure, guaranteed the quality of print cartridge M effectively.

Technical conceive of the present utility model is not limited in the foregoing description, can also obtain many different concrete schemes according to design of the present utility model, for example, can cancel intercommunicating pore 62, directly cavity 1, cavity 2 64 are linked to each other with air admission hole 61, all should be included within the described scope of claim such as these small changes and equivalent transformation with air slot 65.

Claims

1. print cartridge comprises:

Box body, described box body inside are provided with the black sap cavity of at least one band ink supply port;

Air bag is located in the described black sap cavity, and it has an openend;

Gas passage is located on the wall of described box body, and an end communicates with the openend of described air bag, and the other end communicates with described atmosphere;

It is characterized in that:

Parallel connection oppositely is provided with check valve one and check valve two in the described gas passage.

2. according to the described print cartridge of claim 1, it is characterized in that:

The surface of a wall of described box body is provided with air admission hole, air slot, intercommunicating pore and cavity, and described air admission hole, air slot, intercommunicating pore and cavity communicate with each other, and constitutes the part of described gas passage.

3. according to the described print cartridge of claim 2, it is characterized in that:

Described air admission hole, air slot and intercommunicating pore are sealed by a sealing film.

4. according to the described print cartridge of claim 2, it is characterized in that:

Described cavity has two, and described check valve one, check valve two are installed in respectively in described two cavitys.

5. according to each described print cartridge of claim 1 to 4, it is characterized in that:

Described check valve is a membrane valve.

6. according to each described print cartridge of claim 1 to 4, it is characterized in that:

Described check valve is a umbrella valve.

7. according to each described print cartridge of claim 1 to 4, it is characterized in that:

Described check valve comprises valve body, valve gap and valve seat.