CN100579784C - Ink-jet printing head - Google Patents
Ink-jet printing head Download PDFInfo
- Publication number
- CN100579784C CN100579784C CN200610127484A CN200610127484A CN100579784C CN 100579784 C CN100579784 C CN 100579784C CN 200610127484 A CN200610127484 A CN 200610127484A CN 200610127484 A CN200610127484 A CN 200610127484A CN 100579784 C CN100579784 C CN 100579784C
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- Prior art keywords
- sealing piece
- ink
- printing head
- jet printing
- cavity
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Abstract
The invention discloses an inkjet printing head and includes a cavity and a pressure modulation unit. The pressure modulation communicates the cavity. The pressure modulation unit comprises an air-in port, an air-out port, an elastic body and a sealed block connecting the elastic body. The elastic body makes the sealed block move between a first position and a second position through elasticity. When the sealed block is at the first position, the sealed block seal the air-in port; when the sealed block is at the second position, an airflow passes by the air-in port, then passes by the pressure modulation unit and enters into the cavity through the air-out port.
Description
Technical field
The present invention relates to a kind of ink-jet printing head, particularly relate to the high ink-jet printing head of a kind of reliability.
Background technology
With reference to Fig. 1, it shows No. 6213598 disclosed ink-jet printing head 1 of patent of the U.S., comprises airbag 10, side plate 20, spring 30, reed 40 and steel ball 50.Airbag 10 is via the airbag connecting hole 11 that is connected with atmosphere, make outside air flow into the interior airbag 10 of ink-jet printing head smoothly, and airbag 10 is expanded, this moment, spring 30 was compressed simultaneously, when compressed distance reaches when making side plate 20 push up reed 40, the negative pressure in the ink-jet printing head also reaches the certain negative pressure value, and this moment, extraneous atmosphere successfully backed down steel ball 50 by air intake 51, air is entered in the ink-jet printing head, and the negative pressure in the ink-jet printing head is reduced.After negative pressure in the ink-jet printing head reduced, airbag 10 no longer expanded, and spring 30 reduces decrement, makes reed 40 return to primitive age push down the position of steel ball 50, and the do action that so goes round and begins again makes the pressure in the ink-jet printing head continue to maintain in the fixation pressure interval.
Yet the assembling process of above-mentioned ink-jet printing head 1 is very complicated, and built-up time is long, and the restriction that is subjected to ink-jet printing head 1 inner space of airbag 10, and pressure controlled scope is little.And ink-jet printing head 1 is because to be subjected to part too much, and airbag 10 easy materials factor such as go bad, and reliability is not high.
Summary of the invention
A kind of ink-jet printing head that the present invention promptly provides for desire solves the prior art problem comprises a cavity and a pressure modulating unit.This pressure modulating unit is communicated with this cavity.This pressure modulating unit comprises an air inlet port, one port of giving vent to anger, one elastic body and a sealing block, the sealing piece connects this elastic body, this elastic body moves the sealing piece by elastic force between a primary importance and a second place, when the sealing piece is positioned at this primary importance, the sealing piece seals this air inlet port, when the sealing piece is positioned at this second place, one air-flow is through this air inlet port, through this pressure modulating unit, and enter this cavity by this port of giving vent to anger, this air inlet port comprises an inlet channel and a depressed part, the corresponding sealing piece of the shape of this depressed part, when the sealing piece is positioned at this primary importance, sealing block is fitted this depressed part of contact and is sealed this air inlet port, this elastic body comprises a spring and a guide rod, this guide rod pivotally is located in this pressure modulating unit, this spring connects an end of this guide rod, the sealing piece connects the other end of this guide rod, when the sealing piece is positioned at this primary importance, this guide rod is in a first orientation, when the sealing piece was positioned at this second place, this guide rod was in a second orientation, and this spring applies an elastic force to this guide rod.
Use the present invention, the designer can adjust predetermined negative pressure value, to prevent that liquid (printing ink) is from nozzle leakage by adjusting weight, the coefficient of elasticity of elastic body or the gas passage size of air inlet port of sealing block.In addition, the assembly of ink-jet printing head of the present invention is less, and assembling is easy, and reliability is higher.
Description of drawings
Fig. 1 is existing ink-jet printing head schematic diagram;
Fig. 2 a is the ink-jet printing head schematic diagram of first embodiment of the invention, and wherein, sealing block is positioned at a primary importance;
Fig. 2 b is the ink-jet printing head schematic diagram of first embodiment of the invention, and wherein, sealing block is positioned at a second place;
Fig. 3 a and Fig. 3 b are the thin portion structural representation of air inlet port;
Fig. 4 is the thin portion structural representation of housing 121;
Fig. 5 is a variation schematic diagram of first embodiment of the invention;
Fig. 6 a is the ink-jet printing head schematic diagram of second embodiment of the invention, and wherein, sealing block is positioned at a primary importance; And
Fig. 6 b is the ink-jet printing head schematic diagram of second embodiment of the invention, and wherein, sealing block is positioned at a second place.
The main element symbol description
1～ink-jet printing head
10～airbag
20～side plate
30～spring
40～reed
50～steel ball
100～ink-jet printing head
100 '～pharmaceutical device
110～cavity
120～pressure modulating unit
121～housing
1211～body
1212～base
1213～trip
1214～surface
1215～through hole
122～air inlet port
1221～inlet channel
1222～depressed part
123～the port of giving vent to anger
124～elastic body
125～sealing block
130～nozzle
140～air-flow
150～drier
160～medicine gatherer
200～ink-jet printing head
220～pressure modulating unit
221～housing
222～air inlet port
223～the port of giving vent to anger
224～elastic body
2241～spring
2242～guide rod
2243～fulcrum
225～sealing block
The specific embodiment
With reference to Fig. 2 a and Fig. 2 b, the ink-jet printing head 100 that it shows first embodiment of the invention comprises a cavity 110, a pressure modulating unit 120 and a nozzle 130.Pressure modulating unit 120 is located among the cavity 110, and is communicated with this cavity 110.This pressure modulating unit 120 comprises a housing 121, one air inlet ports 122, give vent to anger port 123, an elastic body 124 and a sealing block 125.Air inlet port 122 is opened in the surface of cavity 110.The port 123 of giving vent to anger is opened in the surface of housing 121.Sealing piece 125 connects this elastic body 124.This this housing 121 of elastic body 124 butts.This elastic body 124 makes sealing piece 125 (a) and between the second place P2 (with reference to Fig. 2 b) move with reference to Fig. 2 in a primary importance P1 by elastic force.With reference to Fig. 2 a, when sealing piece 125 is positioned at this primary importance P1, sealing piece 125 these air inlet ports 122 of sealing.With reference to Fig. 2 b, when sealing piece 125 was positioned at this second place P2, an air-flow 140 passed through this air inlet port 122 and this pressure modulating units 120, and enters this cavity 110 by this port 123 of giving vent to anger.Nozzle 130 is located on the cavity 110.
This cavity 110 is a reservoir.After ink-jet printing head 100 continous inkjets, the negative pressure value in this cavity 110 is greater than a predetermined negative pressure value, and at this moment, ambient pressure is pushed sealing piece 125 to this second place P2 from this primary importance P1.After air-flow 140 flowed into cavity 110, the negative pressure value in the cavity 110 was recovered, and this moment, elastic body 124 utilized elastic force that sealing piece 125 is pushed back this primary importance P1.Thus, pressure modulating unit 120 of the present invention can be controlled the negative pressure value in the cavity 110, prevents that liquid (printing ink) from leaking from this nozzle 130.
In first embodiment, this air inlet port 122, this elastic body 124 and sealing piece 125 are arranged along vertical direction, and sealing piece 125 is between this air inlet port 122 and this elastic body 124.Sealing piece 125 is a ball, and this elastic body 124 is a spring.
With reference to Fig. 3 a, it shows the thin portion structure of air inlet port 122, comprise an inlet channel 1221 and a depressed part 1222, the corresponding sealing piece 125 of the shape of this depressed part 1222, when the sealing piece is positioned at this primary importance (with reference to Fig. 3 b), sealing piece 125 is fitted this depressed part 1222 of contact and is sealed this air inlet port 122.In first embodiment, the radius of curvature of depressed part 1222 is equal to the radius of curvature of sealing block 125, and the center of circle of the center of circle of depressed part 1222 and sealing block 125 is positioned on the same plumb line.Depressed part 1222 and sealing block 125 contact area less than 1/2nd sealing block 125 surface areas.
Under general operational scenario, this predetermined negative pressure value between-5～-15mini bar between.
Be somebody's turn to do the size of predetermined negative pressure value, can pass through to adjust the gas passage size of the weight of sealing block 125, the coefficient of elasticity of adjusting elastic body 124 or adjustment air inlet port 122, and be controlled.When the coefficient of elasticity of elastic body 124 was big, this predetermined negative pressure value was bigger, when the coefficient of elasticity of elastic body 124 hour, this predetermined negative pressure value is less.When the weight of sealing block 125 was big, this predetermined negative pressure value was bigger, when the weight of sealing block 125 hour, this predetermined negative pressure value is less.When the gas passage 1221 of air inlet port 122 is big, sealing block 125 is bigger with the contact area of atmosphere, and this predetermined negative pressure value is bigger, when the gas passage 1221 of air inlet port 122 hour, sealing block 125 is less with the contact area of atmosphere, and this predetermined negative pressure value is less.
Therefore, the designer can adjust predetermined negative pressure value by adjusting weight, the coefficient of elasticity of elastic body 124 or the gas passage size of air inlet port 122 of sealing block 125, leaks from this nozzle 130 to prevent liquid (printing ink).For example, in an embodiment of the present invention, the coefficient of elasticity of this elastic body 124 is 0.5.In addition, the assembly of ink-jet printing head of the present invention is less, and assembling is easy, and reliability is higher.
With reference to Fig. 4, it shows the thin portion structure of housing 121, and housing 121 comprises a body 1211 and a base 1212, and the bottom of body 1211 has trip 1213, and body 1211 is by trip 1213 engagement connection bases 1212.Elastic body 124 is by 1214 supports in surface of base 1212.Elastic body 124 and sealing block 125 all are located among the through hole 1215 of body 1211.The diameter of sealing block 125 is greater than the diameter of elastic body 124.The diameter of through hole 1215 is greater than the diameter of sealing block 125.Body 1211 and base 1212 are all made in the mode of injection mo(u)lding.
With reference to Fig. 5, it shows a variation of first embodiment of the invention, and characteristics are that the structure applications of first embodiment is in a pharmaceutical device 100 ', and this pharmaceutical device 100 ' more comprises a drier 150 and a medicine gatherer 160.Wherein, hold pharmaceutical liquid in the cavity 110, pharmaceutical liquid is by nozzle 130 ejection, and through drier 150 dryings, and is last, becomes drug powder and collected by medicine gatherer 160.
Pressure modulating unit of the present invention is not limited to embodiments of the invention applicable to various liquid precision flushers.
With reference to Fig. 6 a and Fig. 6 b, it is the ink-jet printing head 200 that shows second embodiment of the invention, comprises a cavity 110, a pressure modulating unit 220 and a nozzle 130.Pressure modulating unit 220 is located among the cavity 110, and is communicated with this cavity 110.This pressure modulating unit 220 comprises a housing 221, one air inlet ports 222, give vent to anger port 223, an elastic body 224 and a sealing block 225.The characteristics of second embodiment are, elastic body 224 comprises a spring 2241, a guide rod 2242 and a fulcrum 2243, this guide rod 2242 pivotally is located in this housing 221 by fulcrum 2243, this spring 2241 connects an end of this guide rod 2242, sealing piece 225 connects the other end of this guide rod 2242, when sealing piece 225 is arranged in this primary importance (position of Fig. 6 a) and during sealing air inlet port 222, this guide rod 2242 is in a first orientation.When sealing piece 225 is arranged in this second place (position of Fig. 6 b) and when opening air inlet port 222, this guide rod 2242 is in a second orientation, and 2241 pairs of these guide rods 2242 of this spring this moment apply an elastic force.
In a second embodiment, the top of sealing block 225 is coniform, the corresponding sealing piece 225 of the opening shape of this air inlet port 222.
Though disclosed the present invention in conjunction with above concrete preferred embodiment; yet it is not in order to limit the present invention; anyly be familiar with this operator; without departing from the spirit and scope of the present invention; still can do some change and retouching, thus protection scope of the present invention should with enclose claim was defined is as the criterion.
Claims (5)
1. ink-jet printing head comprises:
Cavity; And
Pressure modulating unit, be communicated with this cavity, wherein, this pressure modulating unit comprises the air inlet port, the port of giving vent to anger, elastic body and sealing block, the sealing piece connects this elastic body, this elastic body moves the sealing piece by elastic force between the primary importance and the second place, when the sealing piece is positioned at this primary importance, the sealing piece seals this air inlet port, when the sealing piece was positioned at this second place, an air-flow was through this air inlet port, through this pressure modulating unit, and enter this cavity by this port of giving vent to anger
This air inlet port comprises an inlet channel and a depressed part, the corresponding sealing piece of the shape of this depressed part, and when the sealing piece was positioned at this primary importance, the sealing piece was fitted this depressed part of contact and is sealed this air inlet port,
This elastic body comprises a spring and a guide rod, this guide rod pivotally is located in this pressure modulating unit, this spring connects an end of this guide rod, the sealing piece connects the other end of this guide rod, when the sealing piece was positioned at this primary importance, this guide rod was in a first orientation, when the sealing piece is positioned at this second place, this guide rod is in a second orientation, and this spring applies an elastic force to this guide rod.
2. ink-jet printing head as claimed in claim 1, wherein, the sealing piece is a ball.
3. ink-jet printing head as claimed in claim 1, wherein, the sealing piece is a circular cone.
4. ink-jet printing head as claimed in claim 1, it more comprises a nozzle, is located on this cavity.
5. ink-jet printing head as claimed in claim 1, wherein, this cavity is a reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610127484A CN100579784C (en) | 2006-09-15 | 2006-09-15 | Ink-jet printing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610127484A CN100579784C (en) | 2006-09-15 | 2006-09-15 | Ink-jet printing head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101143516A CN101143516A (en) | 2008-03-19 |
| CN100579784C true CN100579784C (en) | 2010-01-13 |
Family
ID=39206322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610127484A Expired - Fee Related CN100579784C (en) | 2006-09-15 | 2006-09-15 | Ink-jet printing head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100579784C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8919935B2 (en) | 2010-05-10 | 2014-12-30 | Hewlett-Packard Development Company, L.P. | Liquid supply |
| US8570043B2 (en) * | 2010-10-05 | 2013-10-29 | General Electric Company | System and method for self-sealing a coldhead sleeve of a magnetic resonance imaging system |
| CN109823052A (en) * | 2019-03-30 | 2019-05-31 | 珠海益捷科技有限公司 | A kind of check valve assembly and print cartridge |
| CN111002718A (en) * | 2019-12-10 | 2020-04-14 | 晋传华 | Ink box pressure regulating device |
-
2006
- 2006-09-15 CN CN200610127484A patent/CN100579784C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101143516A (en) | 2008-03-19 |
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| C14 | Grant of patent or utility model | ||
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