TW590904B - Ink-jet print cartridge and the back pressure regulating mechanism therefor - Google Patents

Abstract

An ink-jet print cartridge structure is disclosed. The ink-jet print cartridge structure comprises: a house having an ink reservoir, a first venthole, a second venthole and an ink outlet, wherein the first venthole is disposed at the upper portion of the house and the second venthole is disposed at the lower portion of the house; at least two air bags disposed at the interior of the house, wherein the air bags are against the inner wall of the house and communicating with the first venthole for introducing the air into the air bag to regulate the internal pressure of the ink reservoir; a filter base disposed at the bottom of the house and communicating with the second venthole; a filter disposed in the filter base for regulating the air to be introduced into the ink reservoir, thereby regulating the internal pressure of the ink reservoir and/or allowing the volume of the air bags to change correspondingly; and at least two resilient pieces disposed at the filter base or the bottom of the house, wherein the resilient pieces are respectively extending toward the direction of the inner wall of the house and contact with corresponding air bag for regulating the volume of the air bag.

Description

590904 V. Description of the invention (1) [Technical field to which the invention belongs] This case is an ink cartridge and its negative pressure adjustment mechanism, especially an ink cartridge and its negative pressure adjustment mechanism suitable for an inkjet printer. [Previously, the ink, consumables, materials, and thermal droplets of ink droplets near the ink printing table were created by using the principle of the additive bubble ink media. The ink leaks when the ink cartridge changes.] In recent years, with the popularity of personal computers and the Internet, With the rapid growth of the Internet, printers have also become essential products in personal computer equipment. For the average person, a basic inkjet printer is enough to handle all the needs. However, in addition to the functions of the printer itself, the choice of ink, printing paper, and usage method will determine whether the printed product can be used for a long time. Until the ink printing technology exhibition, the way to control the release of inkjet heads (p r i n ^ h e a d) to inkjet media can be roughly divided into two main streams. One is the Thermal Bubble Ink Jet technology. The operating principle is that a thin film resistor is heated to produce a part of the ink, and then the ink is squeezed out, and sprayed through a plurality of nozzles to the other. Piezo-electric technology uses the conductivity of quartz crystals to push the ink out of the nozzle by applying a current to the quartz crystal at a fixed vibration frequency after energization. Bubble technology must have its own unique negative pressure adjustment design. This is because = 1, or = change, or the ink consumption will make the base. ^ Under-right ... To effectively adjust the negative pressure in the ink cartridge will affect the ink The release order of the ink droplets, ^ Κ ^ 疋, affects the situation, and may cause the situation where the ink can not be created or cannot be produced. A +, therefore, using thermal bubble technology

590904 V. Description of the invention (2) Articles such as temperature and ink volume; cattle] :: J: knots are designed to maintain stable ink supply and avoid leakage due to different pressures. Prints and. The situation where ink cannot be supplied, the ink used is stored in ink: 3 J: In the ink printing technology, 'current type: & s weekly method can be further divided into two major-, foamed cotton with porous characteristics For storage of this type of ink cartridge for black ink hibiscus ^ VII, ink material 枓: foamed cotton stuffed into the ink core, and then 2 is a porous property, because the foamed cotton in the ink = =; purpose. However, many pores cannot completely fill the ink, and because of its volume of ink, to avoid causing ink leakage, V is reduced by 85% with a large amount of foam. In addition, in the aspect of the ink e after the use: C large ink storage, because the ink system is made up of several types: the original ink residue. Another-to make the ink achieve a stable effect, added; "dual nature is so when immersed in foamed cotton for a long time may be Qiu ^ ^ bismuth corrosion ^ foamed cotton residue deposition blocking the inkjet head ^ ^ Variation of the damage component or the quality of the print. Moreover, the thinness affects the shape of the intended change '0 This is obviously achieved when the ink E is inserted. Therefore, the structure of this type of ink e still has many shortcomings that need to be improved. 590904 " ― '1. Description of the invention (3) 2. Using airbags, airbags with springs or airbags with springs and pressure plates, etc .:' To improve the reduction of ink storage caused by the use of foamed cotton ' The design of adjusting the internal pressure of the ink cartridge was born accordingly. The working principle of the air bag is to use the atmospheric pressure to make the air bag volume correspondingly change when the internal force of the ink cartridge changes, or to cooperate with the elasticity The mechanism presses against the air bag to moderately adjust the expansion degree of the air bag to achieve the negative pressure balance inside the ink cartridge, thereby enabling the ink cartridge to stably supply ink and avoid ink leakage or inability to supply ink. See the first figure It is a schematic diagram of the structure of a conventional air bag type ink cartridge. The ink cartridge structure includes a casing 11 provided with: an ink tank 111 for storing ink; Connected to the external atmospheric pressure; an ink outlet 12 is provided at the bottom end of the casing 11 to eject ink droplets onto the inkjet medium according to demand; a steel pipe 15 extends from the upper portion of the casing 11 to the ink The bottom of the water tank 111; an air bag 13 is disposed in the ink tank 111 and communicates with the ventilation guide column 112 for introducing outside air into the air bag 13 to adjust the pressure inside the ink cartridge; and an elastic sheet device 丨 4 One end is arranged on the ventilation guide column 11 2, and the other part is sandwiched outside the air bag 1 3 ′. It can use its elasticity to suppress and regulate the air content in the air bag 13 to make the negative pressure inside the ink cartridge. A moderate and gentle adjustment. From the above structure, it can be understood that the larger the shrinkage ratio of the airbag, the closer it is to the space filled with ink storage, and the larger the adjustable pressure range is. Please read the first again Figure (a) and the first figure ㈧), which respectively reveal the learning The state of the airbag in the ink 11 fully collapsed and unfolded.

Page 10 590904 V. Description of the invention (4) One end of the shrapnel device 14 is installed on the housing u ·, so the column part (about 10_) of the "restricted air guiding column" of the shrapnel device cannot be stretched due to gas When the bag 13 is inflated and stretched to its maximum, the straight tail end box bismuth is like η batch of soil ^ Γ eight tail ^ will be pushed to the side wall of the ink after being stretched out ', so that the air bag 13 can no longer be expanded to adjust the internal force of the ink. 'Indirectly caused the inability to eject ink. On the other hand, it is extended from the outer cover of the housing u from the bottom to the bottom of the housing u, so that the ink siphon phenomenon is stored in the steel pipe 15 to adjust the ink concealment. The internal J force. However, when the ink in the ink tank Ui is consumed below the critical point: the ink remaining in the steel officer 15 will be lost, so the outside air will enter the ink tank through the tube, which will destroy the negative pressure ' This will cause the ink remaining in ▲ 7 cartridges to leak out of the ink outlet 12. Even if the criticality of the steel pipe 5 is changed in the groove extending into the bottom of the ink cartridge, it is easy to make the steel officer 15 inside when the ink cartridge is inverted. Ink loss caused the negative pressure in the ink cartridge to lose balance, which in turn caused The condition of the ink arises. Refer to the second figure, which shows another schematic diagram of the ink cartridge negative pressure adjustment device. As shown in the figure, the inkjet module 2 is composed of a housing 2 and a cover 2 2 It is constituted that the casing 21 and the cover 22 are combined to form an ink tank 23 'for storing ink. The cover 22 has an ink injection port 22m for filling ink, and the ink injection port 2 21 After the ink is filled, a sealing plunger 222 can be used to seal it.... The ink tank 23 has an elastic air bag 24 which can communicate with the outside atmosphere through a duct 223 and can air outside air. Into the elastic air bag 24 'to adjust the pressure inside the ink tank. The ink tank 23 has another

Page 11 590904 V. Description of the invention (5) The pressure plate 25 and the spring 26, wherein both ends of the spring 26 are respectively coupled to one side wall of the pressure plate 25 and one side wall of the housing 21, and the elastic air bag 24 The two opposite sides are coupled to the other side wall of the casing 21 and the other side wall of the pressure plate 25. The design of the impeachment 26 can squeeze the air in the elastic air bag 24, so that the elastic air bag "can gently adjust the pressure in the ink tank 23. The bottom of the casing 21 has an ink outlet 211, and the ink outlet 2U Where it is set-the inkjet print head 27 'can spray ink onto the inkjet medium according to the demand. In addition, the bottom of the housing 21 further includes a supplementary air passage 212, which is an extension wall 213 The blocking body 28 can be a sphere, for example, a steel #, and the blocking body 28 is in contact with the opening of the extension wall 213. The bottom of the ink tank has an elastic structure 29. The elastic structure has a first portion 29 & a second portion m 'the second portion 29a is in contact with the blocking body 28 and the first portion 29b is in contact with the pressure plate 25. ίί 中 ， 当 墨The elastic air bag 24 in the water tank 23 is inflated to the same degree as the ink consumption of ink = 23. The pressure plate 25 moves in the direction of B, and the plate 25 pushes the elastic device. So that the first part 29a of the elastic device 29 is not in communication with the obstructing body, 212 enters the ink tank 23 and reduces the volume of the elastic airbag 24 by the pressure within two seconds. In addition, the flexible airbag 24 moves the pressure plate 25 in the direction of entry due to the pressure adjustment and contraction. The pressure plate 25 drives the elastic device. The second part 29b of 29 makes the first = part 29a in close contact with the blockage _ 'blocks the blockage block 28 with the supplemental gas channel 590904 V. Description of the invention (6) ^ However, in the application of the elastic structure 2 9 and The supplementary air passage 2 2 is more than two, and the fixed position at the bottom of the housing 21 is affected by its setting position. Value = hole clothing 24 pushes the pressing plate 25 to a certain distance, and the pressing plate 25 can no longer leave. Therefore, the airbag 24 * can be enlarged again. The elastic airbag 24 cooperates with the pressure plate ^ to control the degree of insufficient, according to the balance of the original, #Air into the ink ink changes and affect the negative i inside the inksmith, such a structural energy The ancient @ μ 7 仏 贞 & withering function, so this kind of ink cartridges can also leak ink, and the problem of inability to supply ink or uneven ink occurs. Miscellaneous materials :: The structure of the negative pressure adjustment mechanism is very There is a remission, or the sensitivity cannot be improved, so it is still not developed-this can avoid the above Point: And] is based on 'how to adjust the mechanism is a problem that needs to be solved urgently at present. [Summary of the invention] ® and its negative pressure adjustment: n :: j = Ink for inkjet printers ... Ink water = instability and insufficient sensitivity adjustment of the guide pressure of the regulating mechanism = the problem of leaking ink, inability to supply ink or uneven ink discharge, such as the limitation of the target range and the ink outlet to achieve the above purpose. An ink concealing structure comprising: Page 13 590904 V. Description of the invention (7) A casing having an ink tank, a first vent hole, a second vent hole and an ink outlet, wherein the first An air hole is provided on the top of the casing, and the second air hole is provided on the bottom of the casing; an air bag group is disposed in the casing and has at least two air bags, wherein the air bags are respectively abutted against the air bag; The inner side wall of the casing is in communication with the first vent hole, and is used for introducing outside air into the air bag to adjust the pressure in the ink tank; a filter seat is disposed at the bottom of the casing and is in contact with the second The vent holes are connected; a filter core is arranged in the filter core seat It is used to adjust the air entering the ink tank, so as to adjust the pressure in the ink tank and / or change the volume of the air bag accordingly; and an elastic sheet set, which is arranged at the bottom of the filter base or the casing There are at least two elastic pieces on the upper side, wherein the elastic pieces respectively extend to the inner side wall of the casing and are in contact with a corresponding air bag to assist in adjusting the volume change of the corresponding air bag. According to the idea of the present case, the ink outlet is provided at the bottom of the casing for spraying ink droplets onto an inkjet medium according to demand. According to the idea of the case, the casing further has a circuitous airway, which is connected to the filter and the heart seat. According to the idea of the present case, the shrapnel set is composed of the two shrapnels connected to a base. According to the idea of the present case, a periphery of the filter seat or a bottom of the casing has a card slot. According to the concept of the present case, the shrapnel set is fixed on the periphery of the filter base or the card slot on the bottom of the casing by the base. According to the idea of the present case, the shrapnel further includes an extension sheet for

Page 14 590904

V. Description of the invention (8) Assist the shrapnel to adjust the volume change of the corresponding airbag. $ Province According to the idea of the present case, a breast milk cover plate is further provided outside the second vent hole. In order to achieve the above-mentioned purpose, a negative pressure regulating mechanism is provided in the present application, which is applied to an inkjet head. The inkjet head has a housing, and the housing has a vent hole, a second vent hole, and an ink outlet. mouth. The structure of the negative pressure regulator is broad: an air bag is arranged in the casing, wherein the air bag is adjacent to the inner side wall of the salty body and is in communication with the first vent hole, and is used to guide external air ^ An air bag adjusts the pressure in the housing; a filter and a heart seat are provided at the bottom of the housing and are connected to the second vent hole; a filter core is provided in the filter seat for adjusting Air enters the ink tank, thereby adjusting the pressure in the ink tank and / or changing the volume of the air bag accordingly; and an elastic sheet is provided on the bottom of the filter base or the housing, wherein the The elastic pieces are respectively extended to the inner side wall of the casing and are in contact with the air bag to assist in adjusting the volume change of the corresponding air bag. To achieve the above object, the present invention further provides an ink cartridge structure, which includes: a housing having an ink tank, a first vent hole, a second vent hole, and an ink outlet; an air bag provided in the case Inside the casing and adjacent to the inner side wall of the casing, the air bag is in communication with the first vent hole; and an elastic sheet is disposed on the bottom of the casing and extends toward the inner side wall of the bottom of the casing to communicate with the The air bags are in contact with each other, and a force is applied to the air bags to adjust their volume. This case can be understood more clearly by the following illustrations and examples.

Page 15 590904 V. Description of the invention (9) [Embodiment] Please refer to the third diagrams (a)-(d), which are schematic diagrams of the ink cartridge and the negative pressure adjustment structure of the preferred embodiment of the present disclosure. As shown in the third figures (a)-(d), the ink cartridge of the present case includes a case 31, and an ink tank 311 is provided inside the case for storing ink. The top of the casing 3 is provided with a first vent hole 3 j 2 and a bottom is provided with a second vent hole 313. The first and second vent holes 312, 313 can communicate with the external atmospheric pressure. The bottom of the casing 31 is further provided with an ink outlet 32, which is in communication with the ink tank 3 11 and can spray ink onto the inkjet medium according to demand. In this embodiment, the air bag group 33 has at least two air bags, and each air bag is disposed in the ink tank 31 and adjacent to the inner wall side of the casing 31. The air bag group 33 is in communication with the first vent hole 312, and is used for introducing outside air into the air bag, and adjusting the internal pressure of the ink cartridge through expansion and contraction of the air bag. In addition, the ink cartridge further has a filter seat 34 ′, which is provided at the bottom of the casing 31 (preferably at the substantially central portion), and is connected to the second vent hole 31 3. The filter core 36 can further adjust the air into the ink tank 3 11 to balance the negative pressure inside the ink tank, so that the ink in the ink tank 3 11 can be normally supplied through the ink outlet 32 and will not leak out. ， 片 ， 和 3 5 are relative to the airbag group 3 3 and are fixed to the filter seat 34 or the housing seat. In this embodiment, the elastic piece group 35 is formed by two elastic pieces connected to one bottom edge. The base of the shrapnel set 35 can be fixed by the filter base seat 34 weeks == or the bottom and bottom slots (not shown) ... two of the airbag set 33 ^ 2 In addition, the two shrapnel sets of the shrapnel set 35 Then placed between the breasts and with its free end facing the inside of the cartridge

Page 16 590904 V. Description of the invention (10) The wall extends and contacts the corresponding airbag. Please refer to the fourth diagrams (a) to (d), which are schematic diagrams of the structure shown in the third diagram when it is applied to. As shown in the figure, when the pressure port in the ink cartridge changes ^ ^ temperature changes or ink consumption changes, the ink cartridge will introduce outside = two air into the air bag group 33 to adjust using the expansion and contraction of the air bag = The pressure change in the water tank 311, combined with the abutment effect of the elastic group 35, can make the expansion and contraction of ^ = more stable and gentle, so that the pressure adjustment can be more stable, smooth and sensitive, which can make the ink cartridge Ink supply is stable and can be avoided. Ink can not be supplied. In addition, since the air bag group 33 is adjacent to the first, the air hole 312 is no longer restricted by the elastic sheet and cannot be opened, so the degree of inflation and contraction of the air can be increased, and the adjustment range and sensitivity can be increased. & A S # In actual application, the ink tank negative pressure adjustment mechanism in this case can further its structure σ _ again refer to the third figure (d) ′, which is a schematic diagram showing the structure of the core seat and the shrapnel. As shown in the third figure (d), a detour air passage 342 is further provided at the bottom of the casing 31, and the air passage 342 can communicate with the filter seat 34, and the air intake amount of the second ventilation hole 313 is adjusted by =. The outer side of the second vent hole 313 ::: wide airway cover plate 36 can be used to protect the filter core 341. In addition, in detail ... the two elastic pieces of the elastic piece group 35 can further be provided with an extension plate 351, and the extension plate 35i can contact the air bag before the elastic piece has contacted the air bag, and can; The air bag is pushed to assist the elastic piece to adjust the sensitivity of the air bag volume change. = In the known ink cartridge and its negative pressure adjusting mechanism, the case of the shrapnel, and 35 series is fixed on the bottom of the filter, the seat 34 or the housing 31, when the shrapnel group ^ two pages 17 590904 V. Invention Note (11) that the air springs of the shrapnel 33 can be fixed at the final fixed position without pressure equalization and its negative impact. However, the other issues are not all equal, and will not be as unstable as the traditional festival. As mentioned, the pressure regulator mentions this ink occurrence. Because the case has to be expanded from cooked to inflated, the inner plate ’is therefore subject to the negative pressure and negative pressure adjustment range of the ink cartridge held by the shrapnel, and it can obviously provide a structure for this case. By using the ink supply of the water tank, the effect of the airbag expansion during the extreme pushing of the case and the limited adjustment of the envelope can improve the ink efficiency of the ink type application case. The industry can't stretch the sheet and the ink cartridge is provided for the inkjet cartridge. Suppress and avoid the value group of 3 to a large extent. Due to sensitive control, the effect of ink leaks in the printer, the printer regulator leaks ink, or ’converts to two shrapnels, the airbag is insufficient in this case, or the ink is not good. The guide of the ink cartridge structure can not supply ink. Those who apply for this technique can use any craftsman's thinking to modify it in any way. Please protect those who want to protect it.

Page 590904 Brief description of the drawings The first pictures (a)-(b): It is a schematic diagram showing the structure of a conventional air bag ink cartridge. The second figure: It is a schematic diagram showing the structure of another conventional air bag type ink cartridge. The third figures (a)-(d) are schematic diagrams illustrating the ink cartridge and its negative pressure adjustment structure of the preferred embodiment of the present invention. The fourth diagram (a)-(d): It is a schematic diagram of the structure when the structure shown in the third diagram is applied to the negative pressure adjustment. Description of Main Symbols 11: Case 111: Ink Tank 11 2: Vent Guide 1 2: Ink Outlet 1 3: Air Bag 14: Shrapnel 1 5: Steel Tube 2: Inkjet Module 21: Case 22: Cover Body 2 3: ink tank 24: elastic air bag 2 5: pressure plate 26: spring 2 7: inkjet print head 2 8: block body 29: elastic structure 2 9a: first part 2 9b: second part 2 11: Ink outlet 2 1 2 .. Air supply channel 2 1 3: Extension wall 2 2 1: Ink injection port 2 2 2: Sealed plunger 223: Duct 31: Housing 311: Ink tank 3 1 2: First vent hole 31 3: second vent hole 3 2: ink outlet

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590904 Brief description of the drawing 3 3: Air bag group 341: Filter core 343: Card slot 3 5 1: Extension piece 3 4: Filter core seat 3 4 2: Move back to the airway 3 5: Shrapnel group 3 6: Cover plate

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Claims (1)

590904 VI. Patent application range 1 · An ink cartridge structure including: a housing having a ink tank, a first vent hole, a second vent hole, and an ink outlet, wherein the first vent hole It is arranged on the top of the shell, and the second vent hole is arranged on the bottom of the shell; " ^ Airbag group, which is arranged in the shell and has at least two airbags, where the ^ is abutted respectively The inner side wall of the casing is in communication with the first vent hole, and is used to introduce outside air into the air bag to adjust the pressure in the ink tank. One: Yu Xin seat, which is arranged at the bottom of the casing and communicates with the A vent hole is connected to each other; a tear heart is arranged in the filter seat to adjust the air entering the ink tank 5 so as to adjust the pressure in the ink tank and / or change the volume of the air bag accordingly. ; And an elastic piece set, which is arranged at the bottom of the filter base or the housing and has at least a rain elastic piece, wherein the elastic pieces respectively extend to the inner side wall of the housing and are in contact with a corresponding air bag, and To assist in adjusting the volume of the corresponding airbag Of. 2. The ink cartridge structure according to item 1 of the scope of the patent application, wherein the ink outlet is provided at the bottom of the casing for spraying ink droplets onto an inkjet medium according to demand. 3. The ink cartridge structure according to item 1 of the scope of patent application, wherein the casing further has a circuitous air passage connected to the filter seat. 4. The ink cartridge structure according to item 1 of the scope of patent application, wherein the shrapnel set is composed of the two shrapnels connected to a base. 590904 VI. Scope of patent application 5 · The ink cartridge structure as described in item 4 of the scope of patent application, wherein the periphery of the ferry seat or the bottom of the shell has a-^ groove. 6. The ink cartridge structure according to item 5 of the scope of the patent application, wherein the elastic piece set is fixed on the periphery of the core block or the card sample at the bottom of the casing with the base. 7. The ink IE structure according to item 4 of the scope of patent application, wherein the shrapnel further includes an extension sheet to assist the shrapnel, and to adjust the volume change of the corresponding airbag. 8. The ink cartridge structure according to item 1 of the scope of patent application, wherein an airway cover is further provided outside the second vent hole. 9 A negative pressure adjustment mechanism, which is applied to an inkjet head, the inkjet head has a casing, the casing has a first vent hole, a second vent hole and an ink outlet, the negative pressure adjustment The mechanism includes: an air bag, which is arranged on the body, wherein the air bag is adjacent to the inner side wall of the housing and communicates with the first vent hole, and is used for introducing outside air into the air bag to adjust the air bag in the housing; Pressure 'a filter seat, which is arranged at the bottom of the casing and is in communication with the second vent hole; A filter core is disposed in the filter core seat to adjust the air entering the body, thereby adjusting the pressure in the casing and / or changing the volume of the air bag accordingly; and an elastic sheet, which is It is arranged on the bottom of the filter base or the shell, wherein the elastic pieces respectively extend to the inner side wall of the shell and contact the air bag to assist in adjusting the volume change of the air bag. Page 590 904 1 0 · The negative pressure regulating mechanism as described in item 9 of the scope of patent application, the complex is connected to the-base. / 、 None of this 1 1 · The negative pressure adjustment mechanism as described in Item 10 of the scope of patent application, wherein the periphery of the filter base or the bottom of the housing has a card slot, and the elastic piece is fixed by a base. In the card slot at the periphery of the filter core seat or at the bottom of the casing. Μ 2 · The negative pressure adjusting mechanism according to item 10 of the scope of the patent application, wherein the elastic piece further includes an extension piece to assist the elastic piece to adjust the volume change of the airbag. 1 3. The negative pressure adjusting mechanism according to item No. 0 of the patent application scope, wherein the first vent hole is provided on the top of the case, and the second vent hole is provided on the bottom of the case. 14. An ink cartridge structure, comprising: a casing having an ink tank, a first vent hole, a first vent hole, and an ink outlet; an air bag disposed in the casing and adjacent to the casing The inner side wall of the case 'the air bag is in communication with the first vent hole; and an elastic sheet is disposed on the bottom of the case and faces the case, = the inner side wall extends to contact the air bag' The force is applied to the airbag, and the volume is reduced. ^ 1 5 · The ink cartridge structure sheet according to item 14 of the scope of patent application further includes an extension sheet to assist the elastic sheet to adjust a change in the volume of the air jacket. The output of this article 16 · The structure of the ink E described in item 14 of the scope of patent application '"# 〇 An ink port is provided at the bottom of the casing, and the ink port includes a wafer borrow $ 23.09 on page 23 VI. Applying patents for dripping onto an inkjet medium '·. IT compiles the water structure, which makes it more popular. · Continuation of the patent application scope No. 14 / iS 5 π ^ The human Wu / ventilation hole is arranged on the top of the shell and the bottom of the body. The structure of the compiled water tank, which is now the first one. As in the patent application scope No. 14 of the ▲ ^ ^ ^ outside the vent hole is also provided with an airway cover. # t if m ^ ^! 9 As described in item 14 of the scope of patent application, two bond one, $ γ dry 1 y '^ > Grab day is connected with the brother's vent hole. Considering the heart seat, it is arranged at the bottom of the casing :: Knot one 20. If the scope of the patent application is the 19th item, it can include a filter core, which is arranged inside the filter seat and is rolled into the ink with the outside. In the tank, the whole angle of the ink tank can be adjusted by this way. 21 · The ink S structure described in item 19 of the patent application scope, wherein the casing further has a circuitous air passage, which is connected with the filter seat for Adjust the air intake of the second vent hole. 2 2. The ink E structure according to item 19 of the scope of patent application, wherein a periphery of the filter seat or a bottom of the housing has a card slot. 2 3. The ink E structure according to item 22 of the scope of the patent application, wherein the elastic piece is fixed in the periphery of the filter base or in the card slot at the bottom of the housing. ❿ Page 24