CN201776988U - Backpressure type ink box - Google Patents

Backpressure type ink box Download PDF

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Publication number
CN201776988U
CN201776988U CN2010205276797U CN201020527679U CN201776988U CN 201776988 U CN201776988 U CN 201776988U CN 2010205276797 U CN2010205276797 U CN 2010205276797U CN 201020527679 U CN201020527679 U CN 201020527679U CN 201776988 U CN201776988 U CN 201776988U
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CN
China
Prior art keywords
ink
back pressure
chamber
air guide
print cartridge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2010205276797U
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Chinese (zh)
Inventor
李世强
王铖
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Print Rite Unicorn Image Products Co Ltd
Original Assignee
Print Rite Unicorn Image Products Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Print Rite Unicorn Image Products Co Ltd filed Critical Print Rite Unicorn Image Products Co Ltd
Priority to CN2010205276797U priority Critical patent/CN201776988U/en
Application granted granted Critical
Publication of CN201776988U publication Critical patent/CN201776988U/en
Priority to PCT/CN2011/079503 priority patent/WO2012034500A1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17513—Inner structure

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  • Ink Jet (AREA)

Abstract

The utility model provides a backpressure type ink box. The ink box comprises a box body provided with an ink storage cavity, an ink supply opening and an air-guide buffer cavity, wherein, the air-guide buffer cavity is communicated with the atmosphere through an air inlet; the bottom of the air-guide buffer cavity is communicated with the ink storage cavity through an air-guide channel; a hollow column provided with an inner cavity is arranged at the bottom of the ink storage cavity; the top of the inner cavity is communicated with the ink storage cavity; and the bottom of the inner cavity is communicated with the air-guide channel. Through adding the hollow column at a certain height at the bottom of the ink storage cavity, the ink box can effectively avoids the occurrence of the bad phenomenon that ink overflows the air inlet.

Description

A kind of back pressure type print cartridge
Technical field
The utility model relates to a kind of print cartridge that is used for ink-jet printer, particularly a kind of back pressure type print cartridge.
Background technology
Ink-jet printer is a kind of printer commonly used at present, its printing type normally provides Mo Yuan by the ink apparatus of print cartridge and so on, via corresponding ink flow duct ink is transported to record head, under the driving of print signal with ink from the nozzle ejection that is provided with on the record head to recording mediums such as paper, finish the record of character or figure.
The existing print cartridge primary structure that is used for ink-jet printer comprises the back pressure cavity that is used to store ink, keeps the air inlet of air pressure balance with external environment condition, to the ink supply port and the negative pressure mechanism of the printhead ink supply of printer.Negative pressure mechanism makes ink in the print cartridge be in the mechanism of certain negative pressure state for the storage request that guarantees normal ink feed and ink, Sponge is inserted in usually adopting in back pressure cavity by negative pressure mechanism, keeps ink by the capillary effect of Sponge; Because built-in cavernous body is full of back pressure cavity and characterization of adsorption, printer can not blot the ink in the sponge only fully, print cartridge uses up the ink that also remains more amount in the sponge of back, the sponge volume is big more, the ink residual volume is many more, most of ink remains in and causes waste in the sponge, also increases user's use cost.In addition, also there is the part print cartridge to adopt valve, controls flowing of ink by the unlatching of valve as negative pressure mechanism.When printer was worked, valve opening, ink began to supply with printhead.When stopping to print, valve closing, ink stop to supply with.Adopt the print cartridge complex structure of valve, equally also increased manufacturing cost as negative pressure mechanism.
China's utility model 03207733.5 discloses a kind of back pressure type print cartridge, and this print cartridge inside is provided with an air duct, and its upper end links to each other with atmosphere as the air inlet of print cartridge, and the lower end is in the back pressure cavity bottom of print cartridge.When printer is worked, the ink of back pressure cavity is taken away a part, form negative pressure to a certain degree in the print cartridge, end by air duct enters print cartridge inside to air from the external world immediately, because the other end of air duct is immersed in the ink, and is in the bottom of back pressure cavity, air must overcome certain hydraulic pressure and just can enter, cause covering the volume of air in the back pressure cavity, the ink volume of taking away less than the machine of being printed always, thus make print cartridge inside be in negative pressure state all the time.
In addition, also having part to adopt the ink apparatus of back-pressure structure principle design is partly to increase some cushion chambers at its air guide channel, and air guide channel is communicated with inking chamber by the cushion chamber bottom.Ambient atmosphere is via air guide channel and cushion chamber, and finally the bottom position from ink apparatus enters into inking chamber, provides the pressure that needs when printing to replenish.
Adopt the ink apparatus of back-pressure structure principle design, because the restriction of ink apparatus volume and the requirement of ink capacity, it is too big that the cushion chamber volume of ink apparatus can't design.Along with the progressively consumption of ink in the ink apparatus, the gas that holds in inking chamber part increases gradually.In the case, when environment temperature has bigger excursion, according to the gas balance equation: the gas in the PT/V=constant, inking chamber will be along with the variation of circumstance of temperature difference pucker ﹠ bloat.Because the ink apparatus of back-pressure structure design, ambient atmosphere all are to enter inking chamber by air guide channel via the cushion chamber bottom.With this understanding, when the gas in the inking chamber expands because of the rising of environment temperature, the ink in the extruded ink water cavity is entered into the cushion chamber of ink apparatus.Because of the cushion chamber volume of ink apparatus can't design enough big, after more ink is extruded to cushion chamber, the bad phenomenon that may cause the part ink to overflow from air inlet.
The utility model content
The purpose of this utility model is to provide a kind of back pressure type print cartridge of improvement, the bad phenomenon that causes the ink in the inking chamber to overflow from air inlet with the variation that improves because of the external environment temperature difference.
For achieving the above object, the utility model has adopted following technical scheme: a kind of back pressure type print cartridge comprises: box body, this box body have ink storage chamber, ink supply port and air guide cushion chamber; Described air guide cushion chamber is connected with atmosphere by air inlet, and the bottom of this air guide cushion chamber is connected with described ink storage chamber by air guide channel; The bottom of described ink storage chamber is provided with an open tubular column with inner chamber, and the top of described inner chamber is connected with described ink storage chamber, and the bottom of this inner chamber is connected with described air guide channel.
Print cartridge of the present utility model can prevent effectively that by increase the open tubular column of certain altitude at the bottom position of ink storage chamber ink from taking place from the bad phenomenon that air inlet overflows.
Preferably, described air guide channel is positioned at the bottom of described box body.
Preferably, be provided with the porous material parts in the described air guide cushion chamber.
Preferably, described air inlet is positioned at the top of described air guide cushion chamber.
Preferably, described ink storage chamber has comprised the back pressure cavity and the ink supply chamber of being separated by dividing plate, described back pressure cavity links to each other with described ink supply chamber by the passage of this dividing plate bottom, and described open tubular column is positioned at the bottom of described back pressure cavity, and described ink supply port is positioned at the bottom in described ink supply chamber.Described back pressure cavity is divided into upper chamber and lower cavity by the plane, end face place of described open tubular column, and the volume of described air guide cushion chamber is not less than 1.7% of described upper chamber volume.
Description of drawings
Fig. 1 is the appearance assumption diagram of a kind of embodiment of back pressure type print cartridge of the present utility model.
Fig. 2 is the box body cutaway view of back pressure type print cartridge shown in Figure 1.
Fig. 3 is the ink supply state diagram of the ink in the back pressure type print cartridge shown in Figure 1 when being in high power capacity.
Fig. 4 be back pressure type print cartridge shown in Figure 3 when ambient temperature raises, the ink level in back pressure cavity and the air guide cushion chamber changes schematic diagram.
Fig. 5 is the ink supply state diagram of the ink in the back pressure type print cartridge shown in Figure 1 when being in intermediate size.
Fig. 6 be back pressure type print cartridge shown in Figure 5 when ambient temperature raises, the ink level in back pressure cavity and the air guide cushion chamber changes schematic diagram.
Fig. 7 is the ink supply state diagram of the ink in the back pressure type print cartridge shown in Figure 1 when being in low capacity.
Fig. 8 be back pressure type print cartridge shown in Figure 7 when ambient temperature raises, the ink level in back pressure cavity and the air guide cushion chamber changes schematic diagram.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
The specific embodiment
Referring to Fig. 1 and Fig. 2, a kind of back pressure type print cartridge of the present utility model has comprised the box body of being made up of drain pan 1 and top cover 2, have air guide cushion chamber 4, air guide channel 5, open tubular column 6, back pressure cavity 7, ink supply chamber 10 and ink supply port 8 etc. in this drain pan 1, be provided with such as porous material parts 12 such as sponges in the air guide cushion chamber 4, be used to the negative pressure that keeps box interior.Open tubular column 6 has inner chamber 61, and the air inlet 3 of print cartridge and ink filling port 9 are formed on the top cover 2, and open tubular column 6 is positioned at the bottom position of back pressure cavity 7, and air guide channel 5 is positioned at the bottom of box body.Wherein, ink supply port 8 is positioned at the bottom in ink supply chamber 10 and is communicated with it, back pressure cavity 7 is separated by dividing plate 11 with ink supply chamber 10, and be connected by the passage of dividing plate 11 bottoms, the top of air guide cushion chamber 4 is connected with atmosphere by air inlet 3, the bottom of this air guide cushion chamber 4 is connected with the inner chamber 61 of open tubular column 6 by air guide channel 5, and the top of this inner chamber 61 is connected with back pressure cavity 7, and the bottom of this inner chamber 61 is connected with air guide channel 5.
In the print procedure of ink-jet printer, ink in back pressure cavity 7 and the ink supply chamber 10 supplies to the printer record head via ink supply port 8, ambient atmosphere enters back pressure cavity 7 after via air inlet 3 inner chamber 61 through air guide cushion chambers 4, air guide channel 5, open tubular column 6, the pressure balance when keeping consumption of ink in the back pressure cavity 7.Because of air guide channel 5 design in the print cartridge bottom, even the ink in back pressure cavity 7 causes the reduction gradually of liquid level because of continuous consumption, can guarantee that also ambient atmosphere offers the stability of the pressure of back pressure cavity 7.
When printer is in off working state, be positioned over the print cartridge in the printer word car, when environment temperature changed (raising or reduction), the gases part in the back pressure cavity 7 will expand along with the rising of environment temperature, shrinks with the reduction of environment temperature.
Fig. 3, Fig. 5, Fig. 7 are respectively the sectional views of the inks in the back pressure cavity 7 when being in high power capacity, intermediate size and low capacity.When environment temperature raise, the gas in the back pressure cavity 7 will expand.According to gas balance equation P V/T=constant, the expanding volume △ V=△ T/T*V of gas, wherein, T, V are respectively the environment temperature of original state and the volume of back pressure cavity 7 interior gases, and △ T is the variation of ambient temperature degree.This shows, under the condition of identical original ambient temperature T and identical variation of ambient temperature △ T, under the expanding volume △ V of gas and the original state in the back pressure cavity 7 V of gases be directly proportional.That is, under identical ambient temperature change condition, along with the consumption gradually of ink in the back pressure cavity 7, the increase gradually of the gas volume V in the back pressure cavity 7, gas expanding volume △ V also increases gradually.The print cartridge of corresponding diagram 3, Fig. 5, Fig. 7 is when ambient temperature raises respectively for Fig. 4, Fig. 6, Fig. 8, and the gases in the back pressure cavity 7 expand and the ink level situation of change.
In traditional back-pressure structure print cartridge, because the requirement of canned minimum quantity of ink in the restriction of print cartridge volume appearance and size and the print cartridge, it is too big that air guide cushion chamber 4 volumes of print cartridge can't design.In back pressure cavity 7, remain under the situation (being that the gas V in the back pressure cavity 7 is bigger under the original state) of less ink, when bigger intensification (being that variation of ambient temperature △ T is also very big) takes place in environment temperature, because the bigger expansion and the too little cause of air guide cushion chamber 4 volumes of print cartridge take place in gas volume in the back pressure cavity 7, the bad phenomenon that often causes the ink in the back pressure cavity 7 to fill full air guide cushion chamber 4 and further overflow from air inlet 3.
And, can prevent effectively that ink from taking place from the bad phenomenon that air inlet overflows by increase the open tubular column 6 of certain altitude at the bottom position of back pressure cavity 7.As Fig. 4, shown in Figure 6, excess ink in this moment back pressure cavity 7 is more, the gas part in the back pressure cavity 7 seldom, even when variation of ambient temperature △ T is very big, the variation of △ V is also very little, and the bad phenomenon that ink is full of air guide cushion chamber 4 and further overflows from air inlet 3 can not take place.Ink in back pressure cavity shown in Figure 87 remains under the less situation, when variation of ambient temperature △ T is very big, though the variation of △ V is also very big, but because the ink levels in this moment back pressure cavity 7 have been lower than the height of open tubular column 6, so the time gas volume △ V that increase in the back pressure cavity 7 can directly discharge via open tubular column 6 and from air inlet 3, and can be with the discharge of the inks in the back pressure cavity 7.
In actual use, the variation of environment temperature generally is not less than 5 ℃, under △ T=5 ℃ situation, and △ V=△ T/T*V=5/(273+25) * V=1.7%*V.The volume of setting air guide cushion chamber 4 is V ', and back pressure cavity 7 is divided into upper chamber V by the plane, end face place of open tubular column 6 1With lower cavity V 2, then as long as guarantee V ' 〉=1.7%*V 1, can avoid ink to overflow fully from air inlet.

Claims (6)

1. back pressure type print cartridge comprises:
Box body, this box body have ink storage chamber, ink supply port and air guide cushion chamber;
Described air guide cushion chamber is connected with atmosphere by air inlet, and the bottom of this air guide cushion chamber is connected with described ink storage chamber by air guide channel;
It is characterized in that:
The bottom of described ink storage chamber is provided with an open tubular column with inner chamber, and the top of described inner chamber is connected with described ink storage chamber, and the bottom of this inner chamber is connected with described air guide channel.
2. back pressure type print cartridge according to claim 1 is characterized in that: described air guide channel is positioned at the bottom of described box body.
3. back pressure type print cartridge according to claim 1 is characterized in that: be provided with the porous material parts in the described air guide cushion chamber.
4. back pressure type print cartridge according to claim 1 is characterized in that: described air inlet is positioned at the top of described air guide cushion chamber.
5. back pressure type print cartridge according to claim 1, it is characterized in that: described ink storage chamber has comprised the back pressure cavity and the ink supply chamber of being separated by dividing plate, described back pressure cavity links to each other with described ink supply chamber by the passage of this dividing plate bottom, described open tubular column is positioned at the bottom of described back pressure cavity, and described ink supply port is positioned at the bottom in described ink supply chamber.
6. back pressure type print cartridge according to claim 5 is characterized in that: described back pressure cavity is divided into upper chamber and lower cavity by the plane, end face place of described open tubular column, and the volume of described air guide cushion chamber is not less than 1.7% of described upper chamber volume.
CN2010205276797U 2010-09-13 2010-09-13 Backpressure type ink box Expired - Lifetime CN201776988U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2010205276797U CN201776988U (en) 2010-09-13 2010-09-13 Backpressure type ink box
PCT/CN2011/079503 WO2012034500A1 (en) 2010-09-13 2011-09-09 Backpressure ink catridge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010205276797U CN201776988U (en) 2010-09-13 2010-09-13 Backpressure type ink box

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CN201776988U true CN201776988U (en) 2011-03-30

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WO (1) WO2012034500A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012034500A1 (en) * 2010-09-13 2012-03-22 珠海天威飞马打印耗材有限公司 Backpressure ink catridge
WO2013007030A1 (en) * 2011-07-08 2013-01-17 Xian Junxiang Negative pressure ink cartridge
CN107379772A (en) * 2017-08-09 2017-11-24 中山市瑞鸿祥电子科技有限公司 A kind of print cartridge
WO2018157594A1 (en) * 2017-02-28 2018-09-07 周兴夫 Print cartridge

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2654351Y (en) * 2003-11-17 2004-11-10 珠海格力磁电有限公司 Ink box
WO2005053960A1 (en) * 2003-12-03 2005-06-16 Dynamic Cassette International Ltd. An ink cartridge
US20070103520A1 (en) * 2005-11-04 2007-05-10 U Colour International Co., Ltd. Interior pressure self-adjustable ink supply cartridge structure
CN201002387Y (en) * 2007-02-24 2008-01-09 珠海天威技术开发有限公司 Ink cartridge for ink-jet printer
JP5006828B2 (en) * 2008-04-04 2012-08-22 キヤノン株式会社 Ink tank
CN201530175U (en) * 2009-10-19 2010-07-21 珠海天威飞马打印耗材有限公司 Back pressure ink box
CN201776988U (en) * 2010-09-13 2011-03-30 珠海天威飞马打印耗材有限公司 Backpressure type ink box

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012034500A1 (en) * 2010-09-13 2012-03-22 珠海天威飞马打印耗材有限公司 Backpressure ink catridge
WO2013007030A1 (en) * 2011-07-08 2013-01-17 Xian Junxiang Negative pressure ink cartridge
WO2018157594A1 (en) * 2017-02-28 2018-09-07 周兴夫 Print cartridge
CN107379772A (en) * 2017-08-09 2017-11-24 中山市瑞鸿祥电子科技有限公司 A kind of print cartridge
CN107379772B (en) * 2017-08-09 2023-09-19 中山市瑞源祥科技有限公司 Ink box

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Granted publication date: 20110330