CN114536976B

CN114536976B - Ink-jet printer for office equipment

Info

Publication number: CN114536976B
Application number: CN202210127901.1A
Authority: CN
Inventors: 甘闽
Original assignee: BEIJING UNI-COLOUR INTERNATIONAL Inc
Current assignee: BEIJING UNI-COLOUR INTERNATIONAL Inc
Priority date: 2022-02-11
Filing date: 2022-02-11
Publication date: 2023-07-07
Anticipated expiration: 2042-02-11
Also published as: CN114536976A

Abstract

The invention relates to the field of ink-jet printers and discloses an ink-jet printer for office equipment, which comprises a printer body, wherein a printing head capable of horizontally moving is arranged in the printer body, a placing box is arranged on the side surface of the printer body, a plurality of ink bins are placed in the placing box, a pump body is arranged on one side of the inside of the printer body, and ink boxes with the same number as the ink bins are arranged on the upper part of an inner cavity of the printing head. Through the switch-on intermediate duct between ink horn and the ink passageway to add the structural design of second ink guide plate, second soft membrane and second piezoelectric unit, when making it warp for first piezoelectric unit positive signal, when pressing out the interior ink of ink passageway, the second piezoelectric unit warp along with first piezoelectric unit simultaneously, under the prerequisite that does not influence ink stability, ration blowout, make the ink negative pressure in ink orifice and the ink passageway improve after the ink blowout, thereby avoid because of the negative pressure is insufficient, lead to the problem of ink from the ink orifice whereabouts.

Description

Ink-jet printer for office equipment

Technical Field

The invention relates to the field of ink-jet printers, in particular to an ink-jet printer for office equipment.

Background

The ink-jet printer is a common office device, which changes color liquid ink into fine particles through nozzles to be sprayed on printing paper, and some ink-jet printers are provided with three or four printing spray heads so as to print yellow, magenta, cyan and black four colors, and the existing ink-jet printer is mainly a micro-piezoelectric technology ink-jet printer, has better printing effect than a thermal bubble ink-jet printer and has wider application range.

Before the ink jet operation of the existing micro-electro-hydraulic ink jet printer, the piezoelectric element slightly contracts under the control of signals, then the piezoelectric element deforms to push ink drops out of the nozzle, the piezoelectric element recovers to contract at the moment that the ink drops are just about to fly away from the nozzle, and the ink liquid level is contracted from the nozzle cleanly, so that the ink drop liquid level is accurately controlled, and each ejected ink drop has a perfect shape and a correct flying direction.

However, because the office uses frequently, current inkjet printer mostly is continuous inkjet, and the ink is supplied through the pump body continuously, and current inkjet printer's piezoelectric element is when once contracting resumes, and printing ink supply to print head department still needs to utilize the negative pressure of piezoelectric element shrink to guarantee that printing ink can not drip, and this makes the easy not enough negative pressure of piezoelectric element shrink, leads to the problem of printing ink drip, and add conventional negative pressure device and keep printing ink can not drip, can influence the blowout volume of printing ink again, influence the printing effect.

Disclosure of Invention

The invention provides an ink-jet printer for office equipment, which has the advantages of ensuring that ink can not drip while normal printing effect is not affected, and solves the technical problems in the background art.

In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides an inkjet printer for office equipment, including the printer body, but the inside of printer body is equipped with the print head of horizontal migration, the side of printer body is equipped with places the box, place the box in place a plurality of ink storehouse, one side of printer body inside is equipped with the pump body, the upper portion of print head inner chamber is equipped with the ink horn the same with ink storehouse quantity, the switch-on has the ink hose between pump body and the ink horn, the switch-on has the ink hose between the pump body and the ink horn, the bottom fixedly connected with first ink guide plate of print head, a plurality of ink passageway has been seted up on the first ink guide plate, and the bottom fixedly connected with nozzle plate of first ink guide plate, set up the ink orifice with ink passageway switch-on the nozzle plate, the top fixedly connected with of first ink guide plate is located the first soft membrane of print head, and the top of first soft membrane is equipped with the first piezoelectric unit the same with ink passageway quantity, be equipped with the second soft membrane in the print head, the second ink guide plate between the second soft membrane and the ink horn is equipped with the second soft membrane, be equipped with the negative pressure device between second ink guide plate and the first ink horn and the second ink guide plate is equipped with the negative pressure device and the negative pressure device is equipped with the negative pressure device to the negative pressure device between the negative pressure device and the second ink pressure device is equipped with the negative pressure device on the second ink duct, the negative pressure device is located to the negative pressure device.

Optionally, the negative pressure device includes the negative pressure pipe of negative pressure device including switch-on middle pipe, the one end flange joint that middle pipe was kept away from to the negative pressure pipe has leads oil pipe, the one end of leading oil pipe and the bottom fixed connection of second ink guide plate, and lead the inner chamber of oil pipe switch-on negative pressure pipe and oil pressure passageway, the inner chamber of leading oil pipe and negative pressure pipe is annotated and is had hydraulic oil, the intraductal movable sleeve of negative pressure is equipped with the second piston, and the second piston is equipped with the second spring towards leading between one side of oil pipe and the side of leading oil pipe, the chip electrode is connected to second piezoelectric unit and first piezoelectric unit electricity simultaneously.

Optionally, the check valve device includes the valve pipe with middle pipe side fixed connection, and the valve intraductal movable sleeve is equipped with the valve plate, the valve plate can extend to in the middle pipe and separate the upper and lower both sides inner chamber of middle pipe, the side fixedly connected with valve rod of valve pipe, the one end fixedly connected with piston plate that the valve pipe was kept away from to the valve rod, the middle part fixedly connected with magnetic path of valve rod one side is kept away from to the piston plate, fixed mounting has oil guide pipe on the side cap that middle pipe one side was kept away from to the valve pipe, and the magnetic pole of one side magnetic pole and the magnetic path side of orientation magnetic path when the electro-magnet was circular telegram is opposite.

Optionally, the first piezoelectric unit and the second piezoelectric unit are both in signal electrical connection with the chip electrode, the chip electrode is in signal electrical connection with the power supply, the power supply is in electrical connection with the coil on the electromagnet, and the power supply further supplies power to the chip electrode.

The invention provides an ink-jet printer for office equipment, which has the following beneficial effects:

this an inkjet printer for office equipment is through switch-on intermediate duct between ink horn and the ink passageway to add the structural design of second ink guide plate, second flexible membrane and second piezoelectric element, when making it warp for first piezoelectric element positive signal, when pressing out the interior ink of ink passageway, second piezoelectric element warp simultaneously along with first piezoelectric element, compare in current printer head under the prerequisite that does not influence stable, the ration blowout of ink, make the ink negative pressure in ink orifice and the ink passageway improve after the ink blowout, thereby avoid causing the ink to drop from the ink orifice because of the negative pressure is insufficient, influence follow-up printing quality, cause the extravagant problem of ink.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of a bottom cut-away of the printhead of FIG. 1 according to the present invention;

FIG. 3 is a schematic view of the intermediate conduit structure of FIG. 2 according to the present invention;

fig. 4 is a signal connection block diagram of the piezoelectric unit according to the present invention.

In the figure: 1. a printer body; 2. a print head; 3. placing a box; 4. a pump body; 5. an ink hose; 6. an ink cartridge; 7. a first ink guide plate; 8. a nozzle plate; 9. an ink channel; 10. a first soft film; 11. a first piezoelectric unit; 12. a second ink guide plate; 13. an intermediate conduit; 14. an oil pressure passage; 15. a second soft film; 16. a second piezoelectric unit; 17. a valve plate; 18. a valve tube; 19. a piston plate; 20. a valve stem; 21. a magnetic block; 22. a first spring; 23. an electromagnet; 24. a negative pressure pipe; 25. an oil guide pipe; 26. a second piston; 27. and a second spring.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1, an inkjet printer for office equipment includes a printer body 1, a print head 2 capable of moving horizontally is disposed in the printer body 1, the print head 2 is driven by a motor to drive a carriage conveyor belt to move, a placement box 3 is disposed on a side of the printer body 1, a plurality of ink bins are disposed in the placement box 3, a pump body 4 is disposed on one side of the interior of the printer body 1, referring to fig. 2, an ink box 6 with the same number of ink bins is disposed on an upper portion of an inner cavity of the print head 2, an ink hose 5 is connected between the pump body 4 and the ink box 6, a first ink guide plate 7 is fixedly connected to a bottom of the print head 2, a plurality of ink channels 9 are formed in the first ink guide plate 7, a nozzle plate 8 is fixedly connected to a bottom of the first ink guide plate 7, ink holes communicated with the ink channels 9 are formed in the nozzle plate 8, a first soft film 10 disposed on a top of the first ink guide plate 7 is fixedly connected with a first ink soft film 10 disposed in the print head 2, a first piezoelectric unit 11 with the same number of ink channels 9 is disposed on a top of the first soft film 10, and the first soft film 11 is deformed by pressing the first soft film 11 to enable the first ink channels 9 to eject ink from the ink channels 8.

The printing head 2 is internally provided with a second ink guide plate 12 positioned above the first soft film 10, the top of the second ink guide plate 12 is provided with a second soft film 15, the ink box 6 is arranged at the top of the second soft film 15, the second ink guide plate 12 is provided with an oil pressure channel 14 corresponding to a plurality of first piezoelectric units 11, the second soft film 15 is provided with a second piezoelectric unit 16 positioned above the oil pressure channel 14, a plurality of intermediate ducts 13 are arranged between the second ink guide plate 12 and the first piezoelectric units 11, the intermediate ducts 13 are communicated with the ink channel 9 and the ink box 6, and the ink in the ink bin of the placement box 3 is conveyed to the ink channel 9 by a pump.

Referring to fig. 3, the negative pressure device includes a negative pressure tube 24 connected to the middle conduit 13, an oil guide tube 25 is flange-connected to one end of the negative pressure tube 24 far away from the middle conduit 13, one end of the oil guide tube 25 is fixedly connected to the bottom of the second ink guide plate 12, the oil guide tube 25 is connected to the negative pressure tube 24 and the inner cavity of the oil pressure channel 14, hydraulic oil is injected into the inner cavities of the oil guide tube 25 and the negative pressure tube 24, a second piston 26 is movably sleeved in the negative pressure tube 24, a second spring 27 is disposed between the side of the second piston 26 facing the oil guide tube 25 and the side of the oil guide tube 25, and the second piezoelectric unit 16 and the first piezoelectric unit 11 are simultaneously electrically connected to the chip electrode.

The chip electrode sends a positive signal to the first piezoelectric unit 11, so that the first piezoelectric unit 11 presses out the ink in the ink channel 9, and simultaneously, the chip electrode sends a positive signal to the second piezoelectric unit 16, so that the second piezoelectric unit 16 deforms and presses down the second soft film 15, thereby pushing the second piston 26 to move right, the ink in the cavity between the ink channel 9 and the middle guide tube 13 is compensated, the positive signal is ensured once, the ink is stably sprayed out of the ink spray hole at the first piezoelectric unit 11, after the ink is sprayed out, the first piezoelectric unit 11 recovers the initial state, the negative pressure in the inner cavity of the ink channel 9 is restored, meanwhile, the second piezoelectric unit 16 is also restored to the initial state, the second piston 26 is reset to move left under the action of the pulling force of the second spring 27, the negative pressure on the right side of the second piston 26 is increased, and when the ink is sprayed out, compared with the existing printer head, the ink is ensured to be stably sprayed out, the ink in the premise of not affecting stable and quantitative spray hole, the ink is sprayed out, the ink and the negative pressure in the ink channel 9 is improved, so that the quality of the ink is not influenced, and the subsequent printing problem is avoided, due to the fact that the negative pressure in the ink is not influenced, and the ink is dropped from the ink is not dropped.

Specifically, the one-way valve device comprises a valve tube 18 fixedly connected with the side surface of the middle guide tube 13, a valve plate 17 is movably sleeved in the valve tube 18, the valve plate 17 can extend into the middle guide tube 13 and separate the inner cavities at the upper side and the lower side of the middle guide tube 13, the side surface of the valve tube 18 is fixedly connected with a valve rod 20, one end of the valve rod 20, which is far away from the valve tube 18, is fixedly connected with a piston plate 19, the middle part of the side of the piston plate 19, which is far away from the valve rod 20, is fixedly connected with a magnetic block 21, a side cover of the valve tube 18, which is far away from the middle guide tube 13, is fixedly provided with an oil guide tube 25, and when the electromagnet 23 is electrified, the magnetic pole at the side, which faces the magnetic block 21, is opposite to the magnetic pole at the side surface of the magnetic block 21, both the first piezoelectric unit 11 and the second piezoelectric unit 16 are electrically connected with a chip electrode through signals, the chip electrode is electrically connected with a power supply signal, the power supply is electrically connected with a coil on the electromagnet 23, the power supply also supplies power to the chip electrode, under the normal state, the valve plate 17 is always in a state of separating the inner cavities at the upper side and the lower side of the middle guide pipe 13 by utilizing the elastic force of the first spring 22, so that the ink channel 9 is separated from the ink box 6, when the first piezoelectric unit 11 is recovered and deformed after the ink spraying is finished, the chip electrode sends out a signal to control the power supply to enable the electromagnet 23 to be electrified and powered off, the electromagnet 23 applies magnetic attraction to the magnetic block 21 when the electromagnet is electrified, the valve plate 17 moves rightwards along with the power supply, the inner cavities at the upper side and the lower side of the middle guide pipe 13 are opened, the ink is replenished, then the power is removed, the valve plate 17 seals the inner cavities at the upper side and the lower side of the middle guide pipe 13 again under the restoring force of the spring, the time interval between the electrifying and the power removing of the electromagnet 23 is determined by the ejection amount of single ink from the ink spray hole, namely the electromagnet 23 is electrified and powered off, and the valve plate 17 is opened to be closed in the time of closing, the ink flow rate is the same as the last ejection rate, so that the negative pressure formed by the left movement of the second piston 26 is not influenced, and the ink is kept stable in the strong chamber between the middle conduit 13 and the ink channel 9 and cannot drop.

When the ink jet printer is specifically used, firstly, the ink bin is filled with ink, when the printer is started to print, paper is put down from the upper part of the printer body 1, the paper moves downwards under the action of the paper guide roller in the printer body 1 and passes through the printing head 2, meanwhile, the printing head 2 moves left and right under the driving of the carriage conveyor belt, when the ink jet holes need to jet ink, the chip electrode sends positive signals to the first piezoelectric unit 11 and the second piezoelectric unit 16 at the ink jet holes, so that the first piezoelectric unit 11 and the second piezoelectric unit 16 deform at the same time, the second piezoelectric unit 16 deform, so that the oil pressure channel 14 is internally pressed with the ink which pushes the second piston 26 to move rightwards, the negative pressure suction force is absorbed in the negative pressure tube 24 when compensating the second piston 26 to move leftwards, meanwhile, the deformation of the first piezoelectric unit 11 presses the ink in the ink channel 9 out of the ink jet holes to finish one-time ink jet printing, and then when the first piezoelectric unit 11 and the second piezoelectric unit 16 recover to a deformed state, the chip electrode sends signals to the power supply, so that the electromagnet 23 is electrified, the valve plate 17 opens, and the electromagnet 23 is matched with the state of the first piezoelectric unit 11 and the second piezoelectric unit 16 to recover to the negative pressure, and the electromagnet 23 is in advance, and the ink jet state is recovered, and the valve plate is ready to be blocked.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an inkjet printer for office equipment, including printing organism (1), but the inside of printing organism (1) is equipped with horizontal migration's print head (2), the side of printing organism (1) is equipped with places box (3), place a plurality of ink storehouse in box (3), one side of printing organism (1) inside is equipped with pump body (4), the upper portion of print head (2) inner chamber is equipped with ink horn (6) the same with ink storehouse quantity, switch-on has ink hose (5) between pump body (4) and ink horn (6), the bottom fixedly connected with first ink guide plate (7) of print head (2), a plurality of ink passageway (9) have been seted up on first ink guide plate (7), and the bottom fixedly connected with nozzle plate (8) of first ink guide plate (7), offer the ink with ink passageway (9) switch-on nozzle plate (8), the top fixedly connected with of orifice (7) is located first soft membrane (10) of print head (2), and the same with first soft membrane (10) of ink passageway (10), and the same quantity of the first piezoelectric element (11) that is equipped with its first piezoelectric element (11). A second ink guide plate (12) positioned above the first soft film (10) is arranged in the printing head (2), a second soft film (15) is arranged at the top of the second ink guide plate (12), an intermediate conduit (13) communicated with the ink box (6) and the ink channel (9) is arranged between the second ink guide plate (12) and the first soft film (10), a second piezoelectric unit (16) for each first piezoelectric unit (11) is arranged on the second soft film (15), an oil pressure channel (14) positioned below the second piezoelectric unit (16) is arranged on the second ink guide plate (12), a negative pressure device is arranged between the oil pressure channel (14) and the intermediate conduit (13), the negative pressure formed by the negative pressure device after the deformation of the first piezoelectric unit (11) prevents ink from dripping, a one-way valve device positioned above the negative pressure device is arranged at the other side of the intermediate conduit (13), and opening signals of the first piezoelectric unit (11), the second piezoelectric unit (16) and the negative pressure device are controlled by a chip electrode;

the negative pressure device comprises a negative pressure pipe (24) communicated with the middle guide pipe (13), one end of the negative pressure pipe (24) far away from the middle guide pipe (13) is connected with an oil guide pipe (25) in a flange manner, one end of the oil guide pipe (25) is fixedly connected with the bottom of the second ink guide plate (12), the oil guide pipe (25) is communicated with the inner cavities of the negative pressure pipe (24) and the oil pressure channel (14), hydraulic oil is filled in the inner cavities of the oil guide pipe (25) and the negative pressure pipe (24), a second piston (26) is movably sleeved in the negative pressure pipe (24), a second spring (27) is arranged between one side, facing the oil guide pipe (25), of the second piston (26) and the side surface of the oil guide pipe (25), and the second piezoelectric unit (16) and the first piezoelectric unit (11) are electrically connected with a chip electrode at the same time;

the one-way valve device comprises a valve pipe (18) fixedly connected with the side surface of the middle guide pipe (13), a valve plate (17) is movably sleeved in the valve pipe (18), the valve plate (17) can extend into the middle guide pipe (13) and separate the inner cavities at the upper side and the lower side of the middle guide pipe (13), a valve rod (20) is fixedly connected with the side surface of the valve pipe (18), one end of the valve rod (20) away from the valve pipe (18) is fixedly connected with a piston plate (19), the middle part of one side of the piston plate (19) away from the valve rod (20) is fixedly connected with a magnetic block (21), an oil guide pipe (25) is fixedly installed on the side cover of one side of the valve pipe (18) away from the middle guide pipe (13), and when an electromagnet (23) is electrified, one side magnetic pole of the electromagnet (21) is opposite to the magnetic pole of the side of the magnetic block (21).

The first piezoelectric unit (11) and the second piezoelectric unit (16) are electrically connected with the chip electrode through signals, the chip electrode is electrically connected with the power supply through signals, the power supply is electrically connected with the coil on the electromagnet (23), and the power supply also supplies power to the chip electrode;

when ink is required to be ejected from the ink ejection hole, the chip electrode sends positive signals to the first piezoelectric unit (11) and the second piezoelectric unit (16) at the ink ejection hole, so that the first piezoelectric unit (11) and the second piezoelectric unit (16) are deformed at the same time, the second piezoelectric unit (16) is deformed, so that the second piston (26) is pushed to move right by the internal pressure of the oil pressure channel (14), the ink sucked into the negative pressure pipe (24) is compensated when the second piston (26) moves left, meanwhile, the deformation of the first piezoelectric unit (11) presses the ink in the ink channel (9) from the ink ejection hole, one-time ink ejection printing is completed, then when the first piezoelectric unit (11) and the second piezoelectric unit (16) recover to a deformed state, the chip electrode sends signals to a power supply, so that the electromagnet (23) is electrified, the valve plate (17) is opened, the negative pressure after the first piezoelectric unit (11) and the second piezoelectric unit (16) recover and the ink fed into the pump body (4) are matched, and the ink is fed, and the electromagnet (23) is in a power-off state and the valve plate (17) is recovered.