CN115384194A

CN115384194A - Ink filter device of printer and printer

Info

Publication number: CN115384194A
Application number: CN202211341666.4A
Authority: CN
Inventors: 张不扬; 朱云龙; 王雪峰; 黄兴; 刘峰海
Original assignee: Ji Hua Laboratory
Current assignee: Ji Hua Laboratory
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2022-11-25
Anticipated expiration: 2042-10-31
Also published as: CN115384194B

Abstract

The invention discloses an ink filtering device of a printer and the printer, wherein the ink filtering device of the printer is used for the printer, the printer comprises an ink box, an ink inlet pipe provided with an ink path switch valve and a spray head provided with a spray nozzle, the ink filtering device of the printer comprises a base body, a filtering assembly and an air supply assembly, the base body is provided with a containing cavity, the containing cavity is provided with an ink inlet and an ink outlet communicated with the spray nozzle, the filtering assembly is arranged in the containing cavity, the filtering assembly comprises a first filtering piece provided with a filtering cavity, the oil inlet end of the ink inlet pipe is communicated with the ink box, the oil outlet end of the ink inlet pipe is fixed in the ink inlet and extends into the containing cavity to be communicated with the filtering cavity, the air supply assembly comprises an air supply pipe and an air path switch valve arranged on the air supply pipe, one end of the air supply pipe is inserted into the containing cavity and is communicated with the filtering cavity, and the other end of the air supply pipe is communicated with an external air source. The filter device can avoid ink leakage of the nozzle due to ink pressure impact.

Description

Ink filter device of printer and printer

Technical Field

The invention relates to the technical field of printing, in particular to an ink filtering device of a printer and the printer.

Background

In ink-jet printing, an ink-jet printer ejects ink onto a print medium through an ink-jet head. The nozzle has a very small hole, i.e. a nozzle, for spraying the ink onto the printing medium, and a typical inkjet printer may have 30 to 200 nozzles, and various impurities exist in the ink and need to be removed so as not to block the nozzles. However, in the existing printer, the ink is easy to generate pressure fluctuation in the transportation of the ink box to the nozzle, and the ink filtering device connecting the ink box and the nozzle is only provided with the filter element, so that after the ink is subjected to pressure impact, the pressure impact of the ink is only directly introduced into the downstream nozzle, and the condition of ink leakage of the nozzle is caused.

In view of the above-mentioned drawbacks, it is desirable to provide a new ink filter device for a printer and a printer.

Disclosure of Invention

The invention mainly aims to provide an ink filtering device of a printer and the printer, and aims to solve the problem that ink leaks from a nozzle due to ink pressure impact of the existing printer.

In order to achieve the above object, the present invention provides an ink filter device for a printer, the printer including an ink cartridge, an ink inlet pipe provided with an ink path switching valve, and a nozzle having a nozzle, the ink filter device including:

the base body is provided with an accommodating cavity, and the accommodating cavity is provided with an ink inlet and an ink outlet which is communicated with the nozzle;

the filter assembly is arranged in the accommodating cavity and comprises a first filter element with a filter cavity, the oil inlet end of the ink inlet pipe is communicated with the ink box, and the oil outlet end of the ink inlet pipe is fixed in the ink inlet and extends into the accommodating cavity to be communicated with the filter cavity;

the air supply assembly comprises an air supply pipe and an air path switch valve arranged on the air supply pipe, one end of the air supply pipe is inserted into the accommodating cavity and communicated with the filter cavity, and the other end of the air supply pipe is communicated with an external air source.

Preferably, still establish the buffering air cavity on the pedestal, the air supply pipe includes first air feed sub-pipe and second air feed sub-pipe, the one end of first air feed sub-pipe with buffering air cavity intercommunication, the other end insert hold the intracavity and with the filter chamber intercommunication, the one end of second air feed sub-pipe with buffering air cavity intercommunication, the other end is used for communicating with external air supply, the gas circuit switch valve is located first air feed sub-pipe or on the second air feed sub-pipe.

Preferably, the base body comprises a first sub base body and a second sub base body which are connected with each other, the accommodating cavity is formed in the first sub base body, and the buffer air cavity is formed in the second sub base body.

Preferably, the first filter element is further provided with a suck-back prevention hole communicated with the filter cavity, and the suck-back prevention hole is communicated with the accommodating cavity.

Preferably, the filter chamber has a communication port communicating with the gas supply pipe, and the suck back prevention hole has a height lower than that of the communication port.

Preferably, the filter assembly still includes the second and filters the piece, the printer still includes the printing ink discharge pipe, the one end of printing ink discharge pipe be used for with the spout intercommunication, the other end is fixed in go out in the china ink mouth and stretch into hold the intracavity, the second filter pack cladding in the printing ink discharge pipe stretches into hold the periphery of the one end in chamber.

Preferably, a plurality of oil outlets are formed in the pipe wall of one end, extending into the accommodating cavity, of the ink discharge pipe at intervals.

Preferably, the filter assembly still includes the division board, the division board is located hold the intracavity, and will hold the chamber and cut apart into first sub-chamber and the sub-chamber of second holding of holding, advance the china ink mouth with the first sub-chamber intercommunication of holding, go out the china ink mouth with the second holds sub-chamber intercommunication, first filter is located first sub-intracavity of holding, the second filters and is located the sub-intracavity is held to the second, seted up the intercommunication on the division board first hold sub-chamber with the second holds the via hole of sub-chamber.

Preferably, the cavity wall of the accommodating cavity is concave to form a mounting groove for mounting the first filter element.

In addition, the invention also provides a printer which comprises a shell and the ink filtering device of the printer, which is arranged in the shell.

According to the technical scheme, the printing ink filtering device of the printer comprises a base body, a filtering assembly and an air supply assembly, the printer comprises an ink box, a printing ink inlet pipe provided with an ink path switch valve and a nozzle provided with a nozzle, the filtering assembly is arranged in a containing cavity on the base body, the filtering assembly comprises a first filtering piece provided with a filtering cavity, printing ink in the ink box enters the filtering cavity through the printing ink inlet pipe, enters the containing cavity through the filtering of the first filtering piece, and reaches the nozzle through an ink outlet after the filtering in the containing cavity. According to the ink filtering device of the printer, the air supply assembly is arranged, when the ink in the ink inlet pipe is impacted by pressure, the air path switch valve of the air supply assembly is opened, air enters the filtering cavity from the air supply pipe, so that the air pressure in the filtering cavity is increased, the flow of the ink in the ink inlet pipe can be inhibited, the impact of the ink on the filtering cavity is reduced, the ink pressure impact can be prevented from reaching the nozzle, and the ink leakage of the nozzle can be effectively prevented.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of an ink filter assembly of a printer according to an embodiment of the present invention;

FIG. 2 is a schematic view of an ink filter assembly of a printer according to an embodiment of the present invention in an ink filter mode;

FIG. 3 is a schematic view of an ink filter of a printer according to an embodiment of the present invention in a state of rapid ink drain;

FIG. 4 shows an ink filter of a printer in an ink pressure surge mode according to an embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name(s)
				1	Seat body	212	Suck-back prevention hole
11	Containing cavity	22	Second filter element
				111	Ink inlet	23	Partition board
112	Ink outlet	231	Via holes
				113	A first sub-cavity	3	Gas supply assembly
114	Second receiving sub-cavity	31	Air supply pipe
				12	Buffer air cavity	311	First air supply sub-pipe
13	First sub-base	312	Second air supply sub-pipe
				14	Second sub-base	32	Gas circuit switch valve
2	Filter assembly	10	Printing ink inlet pipe
				21	First filter element	20	Ink path switch valve
211	Filter cavity	30	Ink discharge tube

The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions such as "first", "second", etc. in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides an ink filtering device of a printer and the printer, and aims to solve the problem that ink leaks from a nozzle due to ink pressure impact of the existing printer.

Referring to fig. 1, the printer includes an ink cartridge, an ink inlet tube 10 having an ink path switch valve 20, and a nozzle having a nozzle, an ink filtering apparatus of the printer includes a base 1, a filtering component 2, and an air supply component 3, the base 1 is provided with a receiving cavity 11, the receiving cavity 11 has an ink inlet 111 and an ink outlet 112 for communicating with the nozzle, the filtering component 2 is disposed in the receiving cavity 11, the filtering component 2 includes a first filter 21 having a filtering cavity 211, an oil inlet end of the ink inlet tube 10 is communicated with the ink cartridge, an oil outlet end of the ink inlet tube 10 is fixed in the ink inlet 111 and extends into the receiving cavity 11 to communicate with the filtering cavity 211, the air supply component 3 includes an air supply tube 31 and an air path switch valve 32 disposed on the air supply tube 31, one end of the air supply tube 31 is inserted into the receiving cavity 11 and is communicated with the filtering cavity 211, and the other end is used for communicating with an external air source.

The ink filtering device of the printer comprises a base body 1, a filtering component 2 and an air supply component 3, wherein the filtering component 2 is arranged in an accommodating cavity 11 on the base body 1, the filtering component 2 comprises a first filtering piece 21 with a filtering cavity 211, ink in an ink box enters the filtering cavity 211 through an ink inlet pipe 10, the ink enters the accommodating cavity 11 through the filtering of the first filtering piece 21, and the filtered ink in the accommodating cavity 11 reaches a nozzle through an ink outlet 112. As shown in fig. 4, in the ink filtering device of the printer according to the present invention, the air supply assembly 3 is provided, a sensor may be further provided in the ink inlet tube 10 to detect the flow rate of the ink, when the sensor detects that the ink in the ink inlet tube 10 has a pressure impact, the sensor transmits a detection signal to a control system of the printer, and the control system controls the opening of the air passage switch valve 32 of the air supply assembly 3, so that the air enters the filter chamber 211 from the air supply tube 31, and the flow direction of the air is indicated by the two-dot chain line arrow, so that the air pressure in the filter chamber 211 is increased, thereby suppressing the flow rate of the ink in the ink inlet tube 10, reducing the impact on the filter chamber 211, further preventing the ink pressure impact from reaching the nozzle, thereby effectively preventing the nozzle from leaking the ink, and the first filter 21 employs a filter material, which is extremely small, selected according to the size of particles to be filtered, but is in the order of micron order to have good air pressure characteristics, thereby further suppressing the ink leakage. It should be noted that, referring to fig. 2, if there is no pressure impact on the ink in the ink inlet pipe 10, only the ink path switching valve 20 is opened, the flow direction of the ink is indicated by the dotted arrow, and the air path switching valve 32 is in a closed state.

Referring to fig. 3, if it is necessary to discharge the ink in the accommodating chamber 11, the ink path switching valve 20 is closed, so that the ink in the ink inlet pipe 10 cannot enter the accommodating chamber 11, the ink in the accommodating chamber 11 is quickly discharged through the ink outlet 112, the air path switching valve 32 is opened, so that the air in the air supply pipe 31 enters the filter chamber 211, the flowing direction of the air is indicated by the two-dot chain line arrow, and the air pressure in the accommodating chamber 11 can be increased by increasing the air pressure in the filter chamber 211, so that the ink in the accommodating chamber 11 is quickly discharged from the ink outlet 112, and the flowing direction of the ink is indicated by the dashed line arrow. Wherein, the ink path switch valve 20 and the air path switch valve 32 can adopt proportional valves.

In one embodiment, the base 1 further has a buffer air chamber 12, the air supply pipe 31 includes a first air supply sub-pipe 311 and a second air supply sub-pipe 312, one end of the first air supply sub-pipe 311 is communicated with the buffer air chamber 12, the other end is inserted into the accommodating chamber 11 and is communicated with the filter chamber 211, one end of the second air supply sub-pipe 312 is communicated with the buffer air chamber 12, the other end is used for being communicated with an external air source, and the air path switch valve 32 is disposed on the first air supply sub-pipe 311 or the second air supply sub-pipe 312. For better controlling the flow of the ink, the air supply pipe 31 includes a first air supply sub-pipe 311 and a second air supply sub-pipe 312 by providing the buffer air chamber 12 on the base body 1, the filter chamber 211 and the buffer air chamber 12 are communicated with each other through the first air supply sub-pipe 311, the buffer air chamber 12 and the external air source are communicated with each other through the second air supply sub-pipe 312, and the air path switch valve 32 is provided on the second air supply sub-pipe 312. After the gas path switching valve 32 is opened, the gas enters the buffer gas cavity 12 through the second gas supply sub-pipe 312 and is buffered in the buffer gas cavity 12, so that the gas pressure is smaller than the gas pressure in the second gas supply sub-pipe 312, the gas in the buffer gas cavity 12 enters the filter cavity 211 through the first gas supply sub-pipe 311, and the ink in the ink inlet pipe 10 is inhibited. The buffer air cavity 12 can prevent the air in the second air supply sub-pipe 312 from directly impacting the filter cavity 211, so as to protect the filter cavity 211, and the air pressure in the buffer air cavity 12 can better inhibit the impact of the ink. It should be noted that if the ink path switching valve 20 and the air path switching valve 32 are proportional valves or the pressure accuracy requirement is not high, the buffer air chamber 12 may not be used.

Further, the base body 1 comprises a first sub base body 13 and a second sub base body 14 which are connected with each other, the first sub base body 13 is provided with an accommodating cavity 11, and the second sub base body 14 is provided with a buffer air cavity 12. In order to facilitate the manufacture of the seat body 1, the seat body 1 can be configured as a first sub seat body 13 and a second sub seat body 14 which are independent from each other, wherein the first sub seat body 13 is provided with an accommodating cavity 11, and the second sub seat body 14 is provided with a buffer air cavity 12, when assembling, one end of the ink circuit switch valve 20 can be fixed on the first sub seat body 13, and the other end is fixed on the second sub seat body 14, so as to play a role of connecting the first sub seat body 13 and the second sub seat body 14, in other embodiments, the first sub seat body 13 and the second sub seat body 14 can also be connected by bolts. One end of the first sub air supply pipe 31 is inserted into the first sub seat body 13, the other end is inserted into the second sub seat body 14, and the second sub air supply pipe 31 is inserted into a side of the second sub seat body 14 far away from the first sub air supply pipe 311.

In addition, in an embodiment, the first filter member 21 is further provided with a suck back prevention hole 212 communicating with the filter chamber 211, and the suck back prevention hole 212 communicates with the accommodation chamber 11. In order to prevent the ink in the filter cavity 211 from reversely entering the ink inlet pipe 10, an anti-suck-back hole 212 may be formed through the cavity wall of the filter cavity 211.

Wherein, the filter chamber 211 has a communication port communicating with the air supply pipe 31, and the height of the suck back prevention hole 212 is lower than that of the communication port. To prevent the ink in the filter chamber 211 from reversely entering the air supply pipe 31, a communication port through which the filter chamber 211 communicates with the air supply pipe 31 may be provided higher than the suck back prevention hole 212.

Further, in order to realize multiple functions, the filter assembly 2 further includes a second filter member 22, the printer further includes an ink discharge pipe 30, one end of the ink discharge pipe 30 is fixed in the ink outlet 112 and extends into the accommodating chamber 11, and the second filter member 22 is wrapped around the periphery of one end of the ink discharge pipe 30 extending into the accommodating chamber 11. For making the filterable effect of printing ink better, filtering component 2 still includes second filtration piece 22, and the cladding of second filtration piece 22 is stretched into the one end periphery that holds in the chamber 11 at printing ink discharge pipe 30, and printing ink filters to holding in the chamber 11 through first filtration piece 21 to through the filtration of second filtration piece 22, discharge to the spout department from printing ink discharge pipe 30 again.

In addition, in the above embodiment, the ink outlet tube 30 has a plurality of oil outlets spaced apart from each other on the wall of the end extending into the accommodating chamber 11. For the increase holds the filter area of the interior printing ink of chamber 11, can stretch into the one end pipe wall that holds chamber 11 with printing ink discharge pipe 30 and go up the interval and set up a plurality of oil outlets, the second filters the periphery that the cladding was stretched into the one end that holds chamber 11 at printing ink discharge pipe 30, holds the filtration that printing ink in the chamber 11 passed through second filter 22 to discharge to spout department through the oil outlet.

In an embodiment, the filter assembly 2 further includes a separation plate 23, the separation plate 23 is disposed in the accommodating chamber 11, and divides the accommodating chamber 11 into a first accommodating sub-chamber 113 and a second accommodating sub-chamber 114, the ink inlet 111 is communicated with the first accommodating sub-chamber 113, the ink outlet 112 is communicated with the second accommodating sub-chamber 114, the first filter member 21 is located in the first accommodating sub-chamber 113, the second filter member 22 is located in the second accommodating sub-chamber 114, and the separation plate 23 is provided with a via hole 231 communicating the first accommodating sub-chamber 113 and the second accommodating sub-chamber 114. For obtaining higher filter fineness, can set up division board 23, division board 23 will hold chamber 11 and divide into first sub-chamber 113 and the second of holding and hold sub-chamber 114, printing ink in the filter chamber 211 filters through first filter piece 21, and enter into first sub-chamber 113 of holding, first printing ink that holds in the sub-chamber 113 gets into the second through via hole 231 on division board 23 and holds in sub-chamber 114, via hole 231 can be the round hole, the second holds the printing ink in sub-chamber 114 and filters through second filter piece 22, the rethread printing ink discharge hole is discharged to the spout department. Ink passes through via hole 231 on the division board 23, can further obtain the buffering to can alleviate the influence of ink impact to the spout, avoid the spout to leak ink.

Further, the cavity wall of the accommodating cavity 11 is recessed to form a mounting groove for mounting the first filter member 21. In order to firmly fix the first filter member 21 in the accommodating chamber 11, a mounting groove is formed in the wall of the accommodating chamber 11, and the ink inlet 111 may be disposed at the bottom of the mounting groove.

In addition, the invention also provides a printer which comprises a shell and the ink filtering device of the printer, wherein the ink filtering device is arranged in the shell. The specific structure of the ink filtering device of the printer in the printer refers to the above embodiments, and since the printer adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides an ink filter equipment of printer, the printer includes the ink horn, is equipped with the printing ink admission pipe of ink route ooff valve and has the shower nozzle of spout, its characterized in that, ink filter equipment of printer includes:

the air supply assembly comprises an air supply pipe and an air path switch valve arranged on the air supply pipe, one end of the air supply pipe is inserted into the accommodating cavity and is communicated with the filter cavity, and the other end of the air supply pipe is communicated with an external air source;

the base body is further provided with a buffer air cavity, the air supply pipe comprises a first air supply sub-pipe and a second air supply sub-pipe, one end of the first air supply sub-pipe is communicated with the buffer air cavity, the other end of the first air supply sub-pipe is inserted into the containing cavity and communicated with the filter cavity, one end of the second air supply sub-pipe is communicated with the buffer air cavity, the other end of the second air supply sub-pipe is communicated with an external air source, and the air path switch valve is arranged on the first air supply sub-pipe or the second air supply sub-pipe.

2. The ink filtering device of a printer according to claim 1, wherein the base includes a first sub base and a second sub base connected to each other, the first sub base having the accommodating cavity, and the second sub base having the buffer air cavity.

3. The ink filter assembly of a printer according to claim 1, wherein said first filter member is further provided with a suck back prevention hole communicating with said filter chamber, said suck back prevention hole communicating with said accommodating chamber.

4. The ink filter device of a printer according to claim 3, wherein said filter chamber has a communication port communicating with said air supply pipe, and a height of said suck back prevention hole is lower than a height of said communication port.

5. The ink filter assembly of a printer according to any one of claims 1 to 4, wherein the filter assembly further includes a second filter member, the printer further includes an ink discharge tube having one end for communicating with the nozzle and the other end fixed to the ink outlet and extending into the accommodating chamber, and the second filter member covers an outer periphery of an end of the ink discharge tube extending into the accommodating chamber.

6. The ink filter of a printer according to claim 5, wherein a plurality of oil outlets are provided at intervals on a wall of an end of said ink outlet tube extending into said receiving chamber.

7. The ink filtering device for a printer according to claim 5, wherein said filter assembly further includes a separation plate, said separation plate is disposed in said accommodating chamber and divides said accommodating chamber into a first accommodating sub-chamber and a second accommodating sub-chamber, said ink inlet is communicated with said first accommodating sub-chamber, said ink outlet is communicated with said second accommodating sub-chamber, said first filter member is located in said first accommodating sub-chamber, said second filter member is located in said second accommodating sub-chamber, and a through hole communicating said first accommodating sub-chamber with said second accommodating sub-chamber is formed in said separation plate.

8. The ink filter assembly of a printer according to any one of claims 1 to 4, wherein a wall of said receiving chamber is recessed to form a mounting recess for mounting said first filter element.

9. A printer comprising a housing and an ink filter of the printer as claimed in any one of claims 1 to 8 disposed within the housing.