JP4522092B2 - Liquid cartridge - Google Patents

Description

  The present invention relates to a liquid cartridge. In particular, the present invention relates to a liquid cartridge that supplies liquid contained therein to the outside.

  An ink jet recording apparatus, which is an example of a liquid ejecting apparatus, is mounted with an ink cartridge containing ink, receives ink from the ink cartridge, and discharges ink onto a recording material to perform recording.

As an ink cartridge that supplies ink to an ink jet recording apparatus, there is an ink cartridge that is divided into an upper ink storage portion and a lower ink storage portion, and these communicate with each other through a communication portion. In this ink cartridge, the ink in the upper ink container is formed in the liquid supply port communicating with the upper ink container based on the pressure difference between the ink jet recording apparatus side and the ink cartridge side when ink is consumed by the ink jet recording apparatus. A liquid supply means for supplying the ink to the ink jet recording apparatus is provided (for example, Patent Document 1).
JP 2003-80730 A

  In the ink cartridge, the dark ink settled in the lower ink container is first supplied to the upper ink container through the communication part, and after the dark ink is used, the thin ink is supplied and supplied to the ink jet recording apparatus. There is a problem that there is a variation in the density of the ink to be used. In addition, in the ink cartridge disclosed in Patent Document 1, a configuration is described in which the flow paths are arranged in the vertical portion and the horizontal portion of the L-shaped partition wall that surrounds the communication portion. Since the communicating portion is arranged directly below the ink, the ink in the vicinity of the horizontal portion merges with the communicating portion, but there is a problem that the flow in the vertical direction in which the dark ink and the thin ink are agitated does not occur in the lower ink storage portion. .

  In order to solve the above-described problem, in the first embodiment of the present invention, a liquid supply port that supplies liquid to the outside, an upper liquid storage portion that communicates with the liquid supply port and stores liquid inside, and an upper liquid A lower liquid storage section that is disposed below the storage section and communicates with the upper liquid storage section via the communication path, and a communication section that communicates with a communication path formed near the bottom surface of the lower liquid storage section And a vertical wall portion extending vertically in the vicinity of the communication portion inside the lower liquid storage portion, the wall portion penetrating the wall portion at the lower end and storing the lower liquid A lower flow path through which the liquid flows between the bottom surface of the part and an upper flow path that is above the lower flow path and penetrates the wall portion and through which the liquid flows with a smaller flow resistance than the lower flow path. As a result, the flow rate of the floating thin liquid increases in the vicinity of the communication portion in the lower liquid storage portion, so that the thick liquid that has settled and the thin liquid that has floated are mixed together to communicate from the communication portion to the upper liquid storage portion. Supplied to. Therefore, variation in the density of the liquid supplied to the outside can be suppressed.

  In the liquid cartridge, the lower channel may be a notch, and the upper channel may be a larger notch than the lower channel. Thereby, the flow resistance of the upper flow path can be reduced, the flow rate of the thin liquid can be increased, and the settled dark liquid and the floating thin liquid can be mixed.

  In the liquid cartridge, the upper surface of the lower liquid storage portion that faces the communicating portion may be higher than the lower flow path portion and lower than the upper flow path portion. Thereby, the liquid can be easily supplied from the lower liquid storage part to the upper liquid storage part via the communication part, and the concentrated liquid that has settled and the thin liquid that floats are mixed and supplied to the communication part. can do.

  In the liquid cartridge, a pair of wall portions may be provided in parallel to each other inside the lower liquid storage portion. Thereby, a dark liquid and a thin liquid can be mixed reliably in the communication part vicinity.

  In the liquid cartridge, the upper flow paths in the pair of wall portions may be provided at different vertical positions. Thereby, in the area | region pinched by a pair of wall part, the flow of the thin liquid can be made to the up-down direction, and a dark liquid and a thin liquid can be stirred reliably.

  In the liquid cartridge, the wall portion may further include a flow path that is between the upper surface of the lower liquid storage section and the upper flow path, passes through the wall section, and allows the liquid to flow with a flow resistance smaller than that of the lower flow path. Accordingly, it is possible to reliably mix a dark liquid and a thin liquid and supply them to the communicating portion when the amount of liquid in the lower liquid storage chamber is large or small.

  The liquid cartridge may further include an inclined wall portion that is disposed above the communication path in the upper liquid storage portion and is inclined in the vertical direction. Thus, the liquid stored in the upper liquid storage unit is stirred by receiving the liquid flow from the lower liquid storage unit to the upper liquid storage unit by the inclined wall unit, and the thick liquid and the thin liquid in the upper liquid storage unit are stirred. Can be mixed.

  In the liquid cartridge, the upper liquid storage unit and the lower liquid storage unit may store pigment ink. Thereby, the dispersion of the concentration of the liquid supplied to the outside can be suppressed by stirring the pigment ink that tends to settle.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the scope of claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

  FIG. 1 shows an example of a liquid cartridge suitable for supplying a liquid to a liquid ejecting head of a liquid ejecting apparatus, using an ink cartridge 500 for an ink jet recording apparatus as seen from an obliquely upper side. It is a front perspective view.

  The liquid ejecting apparatus referred to in the present invention is not only a liquid ejecting head of an ink jet recording apparatus, but also a colorant ejecting head of a color filter manufacturing apparatus for manufacturing a color filter of a liquid crystal display, an organic EL display, an FED (surface And an electrode material (conductive paste) ejecting head for forming electrodes such as a light emitting display), a bio-organic matter ejecting head of a biochip manufacturing apparatus for manufacturing a biochip, and a sample ejecting head as a precision pipette.

  2 and 3 are rear perspective views of the ink cartridge 500 of FIG. 1 as viewed obliquely from below. FIG. 2 shows a state before the film 110 is attached to the surface of the ink cartridge 500. FIG. Shows a state in which the film 110 is attached. FIGS. 4 and 5 are exploded perspective views showing members constituting the ink cartridge 500 in an exploded manner. 6 is a rear view of the ink cartridge 500 of FIG. 1 and shows a state before the film 110 is attached to the ink cartridge 500 of FIG. FIG. 7 is a front view of the ink cartridge 500 of FIG. 1 and shows a state before the film 130 is attached to the opening 122 of the ink cartridge 500. FIG. 8 is a front view of the ink cartridge 500 of FIG. 1 and shows a state after the film 130 is attached to the opening 122 of the ink cartridge 500.

  As shown in FIGS. 4 and 5, the ink cartridge 500 includes a bottomed substantially casing-shaped cartridge main body 120 having an opening 122, a film 130 covering almost the entire surface of the opening 122, and the film 130. A lid 140 covering the outside is provided. The interior of the cartridge body 120 is partitioned by ribs and walls as will be described later. The film 130 seals almost the entire surface of the opening 122 of the cartridge main body 120 so that the inside thereof is in a sealed state. The lid 140 is further fixed to the cartridge body 120 so as to cover the outside of the film 130 in an unsealed state.

  The cartridge main body 120 includes an ink storage unit 111 (see FIG. 7) that stores ink, an ink flow path unit from the ink storage unit 111 to the ink supply unit 160, an ink side passage that allows the ink storage unit 111 to communicate with the atmosphere, An atmosphere valve accommodating portion and an atmosphere communicating portion including an atmosphere side passage are provided, and are integrally formed of, for example, propylene (PP).

  The ink cartridge 500 further includes an ink supply control unit 150, an ink supply unit 160, a storage unit 170, and an engagement lever 180. The ink supply unit 160 is disposed on the lower surface of the cartridge main body 120, and an ink supply needle formed on a carriage on which the ink cartridge 500 is mounted is inserted, and the ink stored in the ink storage unit 111 is transferred to the ink jet recording apparatus. Supply to the recording head. The storage unit 170 is caulked to the mounting portion 190, and the mounting portion 190 is caulked below the side surface of the cartridge main body 120. The storage unit 170 stores information on the type of the ink cartridge 500, information on the color of the ink held by the ink cartridge 500, information on the existing amount of ink, and the like. Pass this information between. The engagement lever 180 is formed on the upper portion of the side surface of the cartridge main body 120 facing the mounting portion 190, and engages with the carriage of the ink jet recording apparatus. The side surface of the mounting portion 190 is regulated by a rib (not shown) formed on the carriage so that the terminal 171 and the elastic contact on the carriage side are in contact with each other.

  The ink supply control unit 150 includes a differential pressure valve that supplies ink in the ink storage unit 111 to the ink supply unit 160 due to a pressure difference between the ink storage unit 111 and the ink supply unit 160 that is generated as ink is consumed. Yes. The ink supply control means 150 is elastically deformable and is a membrane valve 900 which is an example of a valve member inserted into the recess 495 of the cartridge body 120, a valve lid 151 covering the recess 495, the membrane valve 900 and the valve lid. 151 and a coil spring 907 as an example of an urging member disposed between the two.

  As shown in FIG. 7, the ink containing portion 111 is largely divided into an upper portion and a lower portion by a wall 272 extending in the horizontal direction, and an atmosphere side containing portion 270 capable of communicating with the atmosphere through a communication hole 242 is provided at the lower portion. A supply-side storage unit 290 including two first ink storage units 292 and a second ink storage unit 294 that are shielded from the atmosphere is formed in the upper part. The supply-side container 290 is divided into two parts, a first ink container 292 and a second ink container 292, by a vertical wall 271 having a communication part 276 in the vicinity (lower region) of the wall 272, and the second ink. A flow path portion 296 is formed so as to be surrounded by the accommodating portion 294. The flow path portion 296 is connected to the second ink storage portion 294 via the lower communication portion 278 and is connected to the ink supply control means 150 via the passage 298 and the through hole 918. The wall 271 has a lower flow path 276 between the wall 272 and an upper flow path 277 between the upper surface and the upper surface. The channel resistance of the upper channel 277 is smaller than the channel resistance of the lower channel 276. The second ink storage unit 292 is provided with a wall 278, and a flow path 279 is formed between the wall 278 and the wall 272. The supply side storage unit 290 and the atmosphere side storage unit 270 are examples of the upper liquid storage unit and the lower liquid storage unit in the present invention, respectively.

  Further, the downstream side of the ink supply control unit 150 is formed at a through hole 910 communicating with the ink supply control unit 150, a flow path 321 communicating with the through hole 910, one end of the flow path 321, and formed toward the front side. The ink supply unit 160 is configured to communicate with the ink supply unit 160 through the through-hole 323 and the communication unit 304 having one end communicating with the through-hole 323.

  The atmosphere-side storage unit 270 and the first ink storage unit 292 are communicated with each other via a communication path 295 extending in the vertical direction and a communication unit 162 communication unit 162 (FIG. 2) penetrating the bottom surface of the atmosphere-side storage unit 270. Accordingly, when ink is consumed from the ink supply unit 160, the ink in the atmosphere-side storage unit 270 is correspondingly sucked into the first ink storage unit 292, and from here, the second ink storage unit 294, the flow path unit 296, and the like. It is configured to flow into the ink supply control means 150 via The communication section 274, the communication section 162, the communication hole 163, the communication path 295, the communication sections 276 and 278, the flow path section 296, the path 298, and the atmosphere supply section 270 of the ink storage section 111 are connected to the ink supply control means 150. Ink flows through the through holes 918 in this order. The communication part 162 communication hole 163 and the communication path 295 are examples of the communication path in the present invention.

  The atmosphere-side passage, which is the side communicating with the atmosphere with the atmosphere valve communication portion 624 as a boundary, includes an opening 212, a meandering passage 214, a filter housing portion 216, a communication hole 218, a communication portion 222, and side surfaces of the communication portion 222 shown in FIG. It is comprised by the through-hole 652b formed in this, and the press member accommodating chamber 652.

  Specifically, as shown in FIG. 6, one end of one path 214 meandering in a maze formed on the front side of the cartridge main body 120 is opened to the atmosphere as an opening 212, and the other end is ink-repellent and breathable. The filter 215 (FIGS. 4 and 5) having the above function is connected to the filter housing portion 216 in which the filter 215 is housed. The filter housing portion 216 communicates with a communication hole 218 that penetrates from the front side to the back side of the cartridge main body 120. The communication hole 218 is connected to the pressing member housing chamber 652 via the communication part 222 on the back side of the cartridge main body 120 and a communication hole 652 b formed on the side surface of the communication part 222. In the middle of the passage 214, a chamber 930 made of a recess is provided.

  On the other hand, as shown in FIG. 7, the ink side passage with the atmosphere valve communication portion 624 as a boundary is formed by the atmosphere valve chamber 669, the communication hole 238, the communication groove 240, and the communication hole 242. It communicates with the housing part 270.

  The communication hole 238 penetrating from the back side to the front side of the cartridge main body 120 is connected to the communication groove 240 communicating with the communication hole 238, and communicates with the communication groove 240 and through the communication hole 242 penetrating from the front side to the back side of the cartridge main body 120. It communicates with the housing part 270.

  The atmosphere side accommodating portion 270, the supply side accommodating portion 290, the atmosphere valve chamber 669, the atmosphere side passage, and the ink side passage are adhered to the walls partitioning the films 130 and 110 by a method such as heat welding. By this, it becomes a region isolated from the atmosphere.

  The ink supply unit 160 includes a seal member 12 formed of an elastomer having an insertion port 26 into which an ink supply needle provided in the carriage is inserted, a supply valve 13 that closes the insertion port 26 of the seal member 12, and a supply valve. And an urging member 14 made of a coil spring or the like for urging 13 toward the seal member 12. A film 604 is attached to the insertion port 26 of the seal member 12 at the time of factory shipment.

  When the ink cartridge 500 is mounted on the carriage of the ink jet recording apparatus, the convex portion provided on the carriage pushes up the atmospheric valve 650 upward via the film 480 and the atmospheric valve pressing member 654, and the ink supply needle of the carriage The supply valve 13 of the ink supply unit 160 is pushed up. As a result, the atmospheric valve communication portion 624 communicates the atmospheric flow path from the atmospheric valve chamber 669 to the communication hole 242 with the atmosphere. Further, upstream of the supply valve 13 in the ink supply unit 160 communicates with the ink supply needle.

  When the ink jet recording apparatus starts recording in a state where the communication hole 242 communicates with the atmosphere, ink is supplied from the ink supply unit 160 to the recording head through the ink supply needle. When ink is supplied from the ink supply unit 160, the ink that has flowed in the order of the arrow a and the through hole 918 shown in FIG. 7 in the ink storage unit 111 passes through the ink supply control means 150 and the arrow b shown in FIG. 7. , C, d, e in this order, flow into the ink supply unit 160, and ink is supplied to the ink supply needle inserted into the ink supply unit 160.

  In the ink storage unit 111, the ink in the atmosphere-side storage unit 270 is supplied to the supply-side storage unit 290 in accordance with the ink flow. As the ink in the atmosphere-side accommodation unit 270 is consumed, the air flows in order from the communication hole 242 to the atmosphere-side accommodation unit 270 through the paths indicated by arrows f and g in FIG. Ink is supplied from the ink supply unit 160 to the recording head to lower the liquid level of the atmosphere-side accommodation unit 270, but the flow path connecting the atmosphere-side accommodation unit 270 and the supply-side accommodation unit 290 is provided in the atmosphere-side accommodation unit 270. Since there is a communication port at the lowermost part, air does not flow into the supply-side storage unit 290 until all the ink in the atmosphere-side storage unit 270 moves to the supply-side storage unit 290.

  After all the ink in the atmosphere-side container 270 is consumed, the ink in the first ink container 292 and the second ink container 294 in the supply-side container 290 is consumed in this order. During this time, the ink in the supply-side container 290 may flow back to the atmosphere-side container 270 due to the surface tension of the ink meniscus formed in the communication part 162 that connects the supply-side container 290 and the atmosphere-side container 270. Is prevented.

  When the ink in the first ink storage unit 292 starts to be consumed, air flows into the first ink storage unit 292. As a result, the liquid level of the first ink storage portion 292 is lowered. However, since only the lower portion of the first ink storage portion 292 and the second ink storage portion 294 are connected by the communication portion 276, first, the first ink storage portion 292 and the second ink storage portion 294 are connected. The ink in the container 292 is consumed. When the ink in the first ink storage portion 292 is consumed and the liquid level reaches the communication portion 276, the air also enters the second ink storage portion 294 as the ink in the second ink storage portion 294 is consumed. Inflow. While the ink in the second ink container is consumed, surface tension is generated in the communication part 276 due to the ink meniscus, so that the ink in the second ink container 294 is prevented from flowing back to the first ink container 292. The

  As described above, the ink in the atmosphere-side storage unit 270, the first ink storage unit 292, and the second ink storage unit 294 is consumed in this order. The ink storage unit 111 is supplied to the ink supply unit 160 through the passage 918 from the communication unit 278 disposed in the vicinity of the wall 272 that substantially bisects the ink storage unit 111.

  FIG. 9 is a partially enlarged perspective view of FIG. In the atmosphere side accommodation part 270, the upper surface 272 a of the communication part 274 in which the communication hole 163 is arranged is lower than the other walls 272 in the atmosphere side accommodation part 270. In addition, the atmosphere-side accommodation portion 270 includes a first vertical wall portion 510 extending vertically upward from the bottom surface of the atmosphere-side accommodation portion 270 in the vicinity of the communication portion 274, and a first vertical wall parallel to the first vertical wall portion 510. A wall portion 530 is provided.

  The first vertical wall portion 510 has a lower flow path 512 through which the liquid flows between the first vertical wall portion 510 and the bottom surface of the atmosphere side accommodating portion 270 at the lower end. The lower flow path 512 is a notch formed by notching the first vertical wall portion 510. The first vertical wall portion 510 further includes an upper flow path 514 that is above the lower flow path 512 and penetrates the first vertical wall section 510 and through which ink flows with a flow resistance smaller than that of the lower flow path 512. In the embodiment shown in FIG. 9, the upper channel 514 is a notch that is larger than the lower channel 512. Thereby, the channel resistance of the upper channel 514 is smaller than the channel resistance of the lower channel 512. Further, the upper flow path 514 is disposed above the upper surface 272a with the lower wall portion 513 sandwiched between the upper flow path 514 and the lower flow path 512. The first vertical wall portion 510 further includes a second upper channel 516 through which ink flows with a smaller channel resistance than the lower channel 512 with the upper wall 515 sandwiched between the first vertical wall unit 510 and the upper channel 514. In the embodiment shown in FIG. 9, the second upper flow path 516 is a gap generated between the wall 272 and the upper end of the first vertical wall portion 510. Note that the first vertical wall portion 530 has the same configuration as the first vertical wall portion 510, and thus description thereof is omitted.

  Further, the first vertical wall portion 510 and the first vertical wall portion 530 are arranged on the back surface of the passage 214 shown in FIG. Therefore, when the film 110 shown in FIG. 3 is attached to the passage 214, it is possible to prevent “escape” in which the side surface of the cartridge main body 120 provided with the passage 214 is recessed and the film 110 becomes difficult to attach.

  In addition, as shown in FIG. 7, the first ink storage portion 292 of the supply side storage portion 290 has an inclined wall portion 550 that is inclined in the vertical direction. The inclined wall portion 550 is disposed above the communication path 295 extending in the vertical direction.

  In the above configuration, pigment ink is stored in the atmosphere-side storage unit 270 and the supply-side storage unit 290. Here, as shown in FIG. 2 and FIG. 7, in order to use up the ink in the atmosphere side accommodating portion 270 as much as possible, the communicating portion 162 is arranged through the bottom surface of the atmosphere side accommodating portion 270 and passes through the communicating portion 162. Ink is supplied to the supply-side container 290. However, since the pigment of the pigment ink tends to settle, dark ink with a high pigment concentration tends to accumulate near the communication portion 274 where the communication portion 162 is disposed. Furthermore, it is desirable that the upper surface 272a be disposed at a low position in order to reduce the water head pressure for supplying the ink that has passed through the communication portion 162 and the communication hole 163 to the upper supply side accommodation portion 290. Therefore, when the first vertical wall portion 510 and the first vertical wall portion 530 are not provided, the dark ink in the vicinity of the communication portion 274 easily flows out from the communication portion 162 as it is. In this case, after the dark ink has flowed out, the thin ink having the density above it flows out, so that the density of the ink supplied to the outside becomes non-uniform in that it is initially dark and gradually becomes lighter.

  In the present embodiment, since the first vertical wall portion 510 having the lower flow path 512, the upper flow path 514, and the second upper flow path 516 is provided, the ink flows out from the communication hole 163, so that the ink further flows into the communication hole 163. When pulled, the flow rate of the thin ink flowing through the upper flow path 514 and the second upper flow path 516 increases. Therefore, the flow of thin ink (arrows i and j in the figure) is larger than the flow of dark ink (arrow h in the figure), and not only dark ink but also thin ink can flow into the communication hole 163. Also, due to the difference in the flow size, the upper and lower ink flows in the space delimited by the communication portion 274 and the first vertical wall portion 510, and the dark ink and the light ink, especially above the upper flow path 514, are further above. Thin ink can be entrained and stirred.

  In particular, since the upper flow path 514 is disposed above the upper surface 272a facing the communication hole 163, the ink can be easily supplied to the upper supply side accommodating portion 290 partitioned by the lower 272a and communicated. The thin ink above the dark ink that easily collects in the vicinity of the portion 274 can flow toward the communication portion 274. In addition, since the second upper flow path 516 is disposed between the wall 272 of the atmosphere-side storage unit 270, even if the amount of ink in the atmosphere-side storage unit 270 is large and the difference in density becomes large, the upper upper flow path 516 is thin. The liquid can be flowed toward the communication hole 163, and can be reliably mixed with the dark ink below and supplied to the supply side accommodating portion 290.

  Further, since the lower flow path 512 is provided at the lower end of the first vertical wall portion 510, the ink in the atmosphere-side accommodation portion 270 can be almost used up without being blocked by the first vertical wall portion 510. Furthermore, since the first vertical wall portion 530 having the lower flow paths 532 and 534 and the second upper flow path 536 is provided in parallel with the first vertical wall portion 510, dark ink and thin ink are provided in the vicinity of the communication portion 274. Can be mixed reliably.

  In addition, an inclined wall portion 550 is provided above the communication passage 295 through which ink from the atmosphere-side storage portion 270 flows via the communication portion 162. Therefore, the ink stored in the first ink storage unit 292 is agitated by receiving the ink flow from the atmosphere-side storage unit 270 to the supply-side storage unit 290 at the inclined wall portion 550 and changing the flow direction. The thick liquid and the thin liquid in the first ink storage unit 292 can be mixed. In addition, since there are a plurality of walls with small lower flow paths such as the vertical wall 271 having the communication portion 276 and the vertical wall 278 having the communication portion 279, the supply side storage portion 290 can be reliably mixed with the darker ink below. Can be supplied to.

  In the embodiment shown in FIGS. 7 to 9, the upper flow path 514 and the upper flow path 534 in the pair of first vertical wall portion 510 and first vertical wall portion 530 are arranged at the same vertical position. However, the arrangement of the upper and lower positions is not limited to this, and the upper flow path 514 and the upper flow path 534 may be provided at different vertical positions. Similarly, the second upper channel 516 and the second upper channel 536 may also be provided at different vertical positions. Thereby, in the area | region pinched by the pair of 1st vertical wall part 510 and 1st vertical wall part 530, the flow of the up-down direction of a thin ink can be made, and a dark ink and a thin ink can be stirred reliably.

  In the embodiment shown in FIGS. 7 to 9, the pair of first vertical wall portions 510 and the first vertical wall portion 530 are provided vertically, but the present invention is not limited to this, and both or one of the pair of wall portions. May be inclined in the vertical direction.

  As described above, according to the present embodiment, by increasing the flow rate of the floating thin ink in the vicinity of the communication portion 162 in the atmosphere-side accommodation unit 270, the thick liquid that has settled and the thin liquid that has floated are obtained. It is mixed and supplied from the communicating part 162 to the supply side accommodating part 290. Therefore, it is possible to suppress variations in the density of the ink supplied to the outside.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

FIG. 6 is a front perspective view of an ink cartridge 500 according to the present embodiment. FIG. 6 is a rear perspective view of the ink cartridge 500 before a film 110 is attached. FIG. 6 is a rear perspective view of the ink cartridge 500 after a film 110 is attached. 2 is an exploded perspective view of an ink cartridge 500. FIG. 2 is an exploded perspective view of an ink cartridge 500. FIG. FIG. 6 is a rear view of the ink cartridge 500 before a film 110 is attached. FIG. 3 is a plan view of the ink cartridge 500 as viewed from the ink storage unit 111 side. FIG. 7 shows a state after the film 130 is attached. FIG. 8 is a partially enlarged perspective view of FIG. 7.

Explanation of symbols

  110 film, 111 ink container, 120 cartridge body, 122 opening, 130 film, 132 film, 140 lid, 150 ink supply control means, 162 communication part, 163 communication hole, 214 passage, 270 atmosphere side container, 272 Wall, 272a upper surface, 274 communication portion, 290 supply side accommodating portion, 500 ink cartridge, 510 first vertical wall portion, 512 lower flow path, 513 lower wall portion, 514 upper flow path, 515 upper wall portion, 516 second upper flow path, 530 1st vertical wall part, 532 Lower flow path, 533 Lower wall part, 534 Upper flow path, 535 Upper wall part, 536 2nd upper flow path, 550 Inclined wall part, 624 Atmospheric valve communication part, 650 Atmospheric valve, 652 Press member accommodation Chamber, 654 atmospheric valve pressing member, 656 coil spring, 669 atmospheric valve chamber

Claims (5)

A liquid supply port for supplying liquid to the outside;
An upper liquid storage portion that communicates with the liquid supply port and stores the liquid therein;
Disposed below the on liquid storage portion, communicates with the upper liquid storage portion and the communication path, and the lower liquid storage portion for storing liquid therein,
A communication part communicating with the communication path formed in the vicinity of the bottom surface of the lower liquid storage part;
A liquid cartridge provided in the vicinity of the communication portion inside the lower liquid storage portion, and a wall portion extending upward from the bottom surface of the lower liquid storage portion ;
A lower flow path through which the liquid flows between the lower end of the wall section and the bottom surface of the lower liquid storage section; the lower flow path is located above the lower flow path and penetrates the wall section; A first upstream flow path through which liquid flows with a smaller flow path resistance, and a second upstream where liquid flows between the upper end of the wall and the upper surface of the lower liquid storage section with a flow resistance smaller than the lower flow path. A liquid cartridge having a channel . The liquid cartridge according to claim 1, wherein the lower flow path is a cutout, and the first upper flow path is a cutout larger than the lower flow path.   The liquid cartridge according to claim 1, wherein a pair of the wall portions are provided in parallel with each other inside the lower liquid storage portion.   The liquid cartridge according to claim 1, further comprising an inclined wall portion that is disposed above the communication path in the upper liquid storage portion and is inclined in the vertical direction.   The liquid cartridge according to claim 1, wherein the upper liquid storage portion and the lower liquid storage portion store pigment ink.

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