JP4289180B2 - Waste ink tank - Google Patents

Description

  The present invention belongs to the technical field of waste ink tanks, and more particularly, to the technical field of waste ink tanks that store waste ink generated during operation of so-called inkjet printers.

  In recent years, inkjet printers have become popular because of their low cost and small size.

  Here, in the conventional ink jet printer, when resuming use after it has not been used for a long period of time, in order to eliminate the influence of clogging of ink discharge ports formed in the recording head, before resuming the use, It is necessary to apply a negative pressure to the ink flow path including the ink discharge port and extract the ink accumulated in the flow path as waste ink. In general, the extracted waste ink is not discharged outside the printer but is stored in a waste ink tank in the printer.

  In addition, when performing so-called borderless printing, since the ink discharge range is outside the range of the printing paper, waste ink is also generated in this case, and this waste ink is also stored in the waste ink tank.

  Here, as a structure of a conventional waste ink tank, there is a case where the waste ink tank is generally elongated due to a dimensional restriction relationship of the printer itself. However, in the case of this shape, for example, when the printer itself is tilted by 90 degrees during movement or the like, the head height in the stored waste ink becomes higher and the head pressure increases, so that the waste ink is removed from the waste ink tank. There was a problem of being drowned.

Therefore, in order to prevent the waste ink from leaking outside, techniques according to Patent Documents 1 to 3 below have been developed.
Japanese Patent No. 3284453 (FIGS. 2 and 3) Japanese Patent Application Laid-Open No. 11-129504 (FIGS. 1, 2 and 3) Japanese Patent Laid-Open No. 2001-171148 (FIG. 6)

  Patent Document 1 discloses that the waste ink storage chamber is divided into a plurality of compartments, and Patent Document 2 discloses that the absorbent foam packed in the waste ink storage chamber is divided into two and a space between them. A configuration is disclosed in which waste ink flows into the other when it becomes impossible to absorb the waste ink in the other. Further, Patent Document 3 discloses a configuration in which a waste ink storage chamber is divided into a plurality of partition walls and a foam for absorbing waste ink is packed in each compartment.

  However, in any of the conventional configurations described above, the entire shape of the waste ink tank itself is a simple rectangular parallelepiped. Therefore, it is possible to promptly absorb waste ink, but a large amount of waste ink is generated at one time. In such a case, there is a problem in that the evaporation of the ink is delayed and as a result, the waste ink may overflow.

  Also, even if the waste ink tank is divided into two, there is no devise to distribute the waste ink evenly and store them, so when one storage chamber is full, the waste ink is stored in the other storage chamber. In this case, there is a problem in that the waste ink from the arrowhead may leak out.

  Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to achieve both rapid evaporation of waste ink and effective storage of a large amount of waste ink in a small occupied space. Another object of the present invention is to provide a waste ink tank having a structure capable of allowing waste ink to flow into each of the storage portions in a case where there are a plurality of storage portions of the waste ink.

In order to solve the above problems, the invention according to claim 1, stores the waste ink from the printer, and a first storage unit which upper surface in the use state is opened as evaporation port, and storing the waste ink the a second reservoir portion upper surface in use state is opened as evaporation port, a waste ink receiving portion wherein the first reservoir and connects the second storage unit and the waste ink is poured, the A waste ink receiving part that connects the first storage part and the second storage part by a bottom surface that is horizontal in use , wherein the second storage part is formed deeper than the first storage part And the opening area of the said evaporation opening in said 2nd storage part is formed so that it may become narrower in top view than the opening area of the said evaporation opening in said 1st storage part .

Therefore, since the waste ink tank is formed by the first storage portion that is shallow and has a wide opening area of the evaporation port and the second storage portion that is deep and has a small opening area of the evaporation port, the waste ink is rapidly evaporated. It is possible to achieve both effective storage of a large amount of waste ink in a small occupied space.

  Further, since the first storage unit and the second storage unit are connected by the bottom surface in the waste ink receiving unit that is horizontal in the use state, the waste ink can be made to flow into each storage unit substantially evenly.

  In order to solve the above problem, the invention according to claim 2 is the waste ink tank according to claim 1, wherein the waste ink receiving portion is located at a position facing a discharge port from which the waste ink is discharged. Is provided with a waste ink receiving wall.

  Therefore, in addition to the operation of the invention according to claim 1, since the waste ink receiving wall facing the discharge port from which the waste ink is discharged is provided in the waste ink receiving portion, the discharged waste ink is the waste ink. The waste ink can flow smoothly and evenly into each storage part by flowing into each storage part after hitting the receiving wall.

  In order to solve the above-described problem, the invention according to claim 3 is the waste ink tank according to claim 2, wherein the waste ink is ejected from the first ejection port, and the diameter is smaller than that of the first ejection port. A large second ejection port, and the waste ink receiving wall is provided at a position facing at least the second ejection port.

  Therefore, in addition to the operation of the invention described in claim 2, since the waste ink receiving wall is provided at least at a position facing the second discharge port having a diameter larger than that of the first discharge port, a large amount of waste ink is generated. Even when discharged, it can smoothly flow into each storage section.

  In order to solve the above-mentioned problems, according to a fourth aspect of the present invention, in the waste ink tank according to any one of the first to third aspects, the first storage section is located inside the first storage section. A plurality of partition walls extending inward from the longitudinal side walls of the section are formed, and the partition walls are arranged in a staggered manner so that the waste ink is distributed to all the first storage sections.

  Therefore, in addition to the operation of the invention according to any one of claims 1 to 3, a partition wall extending inward from a longitudinal side wall of the first storage part is provided inside the first storage part. Are arranged in a staggered manner, so that even if the waste ink tank is inclined, the water head difference is divided by each partition wall, and as a result, the water head pressure as a whole of the first storage section is reduced, and the first storage Waste ink stored in the section is less likely to overflow.

  In order to solve the above-described problems, according to a fifth aspect of the present invention, in the waste ink tank according to the fourth aspect, each of the partition walls is configured to have a T-shaped planar shape.

  Therefore, since the planar shape of each partition wall is T-shaped, the water head difference can be effectively divided even if the waste ink tank is inclined.

  In order to solve the above-described problems, according to a sixth aspect of the present invention, in the waste ink tank according to the fourth aspect, each of the partition walls has an L-shaped planar shape.

  Therefore, since the planar shape of each partition wall is L-shaped, the water head difference can be effectively divided even if the waste ink tank is inclined.

  In order to solve the above-described problems, according to a seventh aspect of the present invention, in the waste ink tank according to the fourth aspect, each of the partition walls is configured to have a curved saddle-shaped planar shape. .

  Therefore, since the planar shape of each partition wall is a curved saddle shape, the water head difference can be effectively divided even if the waste ink tank is inclined.

  In order to solve the above-described problem, the invention according to claim 8 is the waste ink tank according to any one of claims 1 to 7, wherein the waste ink receiver includes the waste ink receiver and the waste ink receiver. A first communication surface that communicates with the first storage portion and a second communication surface that communicates the waste ink receiving portion and the second storage portion are formed, and the waste ink receiving portion is formed on the bottom surface. The inclined surface is formed so as to incline toward the first communication surface and the second communication surface from the position where the waste ink is poured.

  Therefore, in addition to the operation of the invention according to any one of claims 1 to 7, from the position where the waste ink is poured into the bottom surface of the waste ink receiving portion, toward the first communication surface and the second communication surface. Since the inclined surface that is inclined is formed, the waste ink can smoothly flow into each storage unit.

  In order to solve the above-described problem, the invention according to claim 9 is the waste ink tank according to any one of claims 4 to 7, wherein the partition wall is provided in the first storage portion. A waste ink absorbing material that absorbs and holds the waste ink is inserted into the space.

  Therefore, in addition to the operation of the invention according to any one of claims 4 to 7, since the waste ink absorbing material is inserted into the space between the partition walls in the first storage portion, each partition wall The water head pressure in the meantime will be lowered, and even if the waste ink tank is tilted, the waste ink stored in the first storage part will not easily overflow.

  In order to solve the above-described problem, the invention according to claim 10 is the waste ink tank according to any one of claims 1 to 9, wherein the second storage unit has a vertical direction in the use state. And a waste ink absorbing material for absorbing and holding the waste ink is inserted.

  Therefore, in addition to the operation of the invention according to any one of claims 1 to 9, since the waste ink absorbing material divided in the vertical direction in the use state is inserted in the second storage portion, Even when a large amount of waste ink is discharged at once, the waste ink can be quickly swallowed into the waste ink absorber.

  In addition, the waste ink absorbing material in the first storage section and the waste ink absorbing material in the second storage section are divided by the waste ink receiving section. As a result, the water head difference is further divided and the water head pressure is reduced. The waste ink is more difficult to overflow.

Furthermore, when either the first storage unit or the second storage unit is full of waste ink, no further waste ink flows into the full of the waste ink, resulting in the first storage unit. The waste ink can be stored evenly in the second storage unit.

As described above, according to the first aspect of the present invention, the waste ink is formed by the first storage portion that is shallow and has a wide opening area of the evaporation port , and the second storage portion that is deep and has a small opening area of the evaporation port. Since the tank is formed, it is possible to achieve both rapid evaporation of waste ink and effective storage of a large amount of waste ink in a small occupied space.

  Further, since the first storage unit and the second storage unit are connected by the bottom surface in the waste ink receiving unit that is horizontal in the use state, the waste ink can be made to flow into each storage unit substantially evenly.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the waste ink receiving portion is provided with a waste ink receiving wall facing the discharge port from which the waste ink is discharged. Therefore, after the discharged waste ink hits the waste ink receiving wall and flows into each storage unit, the waste ink can be smoothly and evenly flowed into each storage unit.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 2, the waste ink receiving wall is provided at least at a position facing the second discharge port having a diameter larger than that of the first discharge port. Therefore, even when a large amount of waste ink is ejected, the ink can smoothly flow into each storage unit.

  According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, the side wall in the longitudinal direction of the first storage part is provided inside the first storage part. Since the partition walls extending inward from the plurality are arranged in a staggered manner, even if the waste ink tank is inclined, the water head difference is divided at each partition wall, and as a result, the first storage section as a whole The water head pressure is reduced, and the waste ink stored in the first storage unit is less likely to overflow.

  According to the invention described in claim 5, in addition to the effect of the invention described in claim 4, since the planar shape of each partition wall is T-shaped, the water head can be effectively used even if the waste ink tank is inclined. The difference can be divided.

  According to the invention described in claim 6, in addition to the effect of the invention described in claim 4, the planar shape of each partition wall is L-shaped. The difference can be divided.

  According to the seventh aspect of the invention, in addition to the effect of the fourth aspect of the invention, the planar shape of each partition wall is a curved saddle shape, which is effective even when the waste ink tank is inclined. The head differential can be divided.

  According to the invention described in claim 8, in addition to the effect of the invention described in any one of claims 1 to 7, the first series of passages from the position where the waste ink is poured into the bottom surface of the waste ink receiving portion. Since the inclined surface which inclines toward the surface and the second communication surface is formed, the waste ink can smoothly flow into each storage unit.

  According to the invention described in claim 9, in addition to the effect of the invention described in any one of claims 4 to 7, the waste ink absorbing material is disposed in the space between the partition walls in the first storage unit. Since it is inserted, the water head pressure between the partition walls is lowered, and even if the waste ink tank is tilted, the waste ink stored in the first storage section is difficult to overflow.

  According to the operation of the invention described in claim 10, in addition to the effect of the invention described in any one of claims 1 to 9, the second storage section is divided in the vertical direction in use. Since the waste ink absorbing material is inserted, even when a large amount of waste ink is discharged at one time, the waste ink can be quickly swallowed into the waste ink absorbing material.

  In addition, the waste ink absorbing material in the first storage section and the waste ink absorbing material in the second storage section are divided by the waste ink receiving section. As a result, the water head difference is further divided and the water head pressure is reduced. The waste ink is more difficult to overflow.

Furthermore, when either the first storage unit or the second storage unit is full of waste ink, no further waste ink flows into the full of the waste ink, resulting in the first storage unit. The waste ink can be stored evenly in the second storage unit.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings. The embodiment described below is an embodiment when the present invention is applied to a waste ink tank provided in an ink jet printer.

(I) First Embodiment First, a first embodiment according to the present application will be described with reference to FIGS.

  1 is an external perspective view of the waste ink tank according to the first embodiment, FIG. 2 is a top view showing a detailed configuration of the waste ink tank itself, and FIG. 3 is an enlarged top view of a portion A in FIG. 4 is a top view of the waste ink tank in use, and FIG. 5 is an internal perspective view of the waste ink tank attached to an ink jet printer.

  First, the structure of the waste ink tank itself according to the first embodiment will be described with reference to FIGS.

  As shown in FIGS. 1 to 3, the waste ink tank 1 according to the first embodiment is formed by integral molding using, for example, polypropylene or the like as a material, and has a flat rectangular parallelepiped shape as a whole. 2 and the second storage part 3 having a rectangular parallelepiped shape deeper than the first storage part 2 as a whole, the first storage part 2 and the second storage part 3 are connected to each other so that the waste ink can flow in, and the waste ink. Is constituted by a waste ink receiving portion 4 which is poured from a waste ink pump or the like (not shown).

  At this time, the second storage unit 3 is used in a state in which the upper surface is all opened, and an after-mentioned absorbing foam for absorbing waste ink is packed. The second storage unit 3 and the waste ink receiving unit 4 are connected via the communication port 20 so that the waste ink can freely flow into the second storage unit 3 from the waste ink receiving unit 4.

  The first storage part 2 is also open at the entire top surface, and partition walls 5 to 7 each having a T-shaped planar shape are integrally formed therein in a staggered manner. At this time, the base portions of the partition walls 5 and 7 are formed integrally with one wall of the first storage portion 2, and the base portion of the partition wall 6 is formed integrally with the other wall of the first storage portion 2. Yes. In addition, the first storage unit 2 and the waste ink receiving unit 4 are connected via a communication port 21 so that the waste ink can freely flow into the first storage unit 2 from the waste ink receiving unit 4. Accordingly, an after-mentioned absorbent foam packed in the first storage unit 2 passes through the space between the partition walls 5 to 7 in the first storage unit 2 from the position of the communication port 21 and the communication port 21 of the first storage unit 2. Are continuously packed up to the opposite end.

  Next, the waste ink receiving part 4 is connected to the waste ink pump and inserted into a tube (not shown) through which waste ink flows, so that the tube connecting parts 8 and 9 connecting the waste ink receiving part 4 and the tube are provided. The waste ink is formed on the side wall, and the waste ink flows into the waste ink receiving portion 4 from the openings 8A and 9A to the respective waste ink receiving portions 4.

  Here, the tube into which the tube connecting portion 8 is to be inserted is connected to an ink cap (not shown), and the waste ink pump of the waste ink pump is installed in a maintenance portion (not shown) provided in the printer in which the waste ink tank 1 is loaded. Waste ink sucked by the function flows.

  On the other hand, the tube into which the tube connecting portion 9 is inserted is connected to an air communication hole provided in a switching unit (not shown), and waste ink leaking from the air communication hole is transferred to the waste ink tank 1. Lead.

  At this time, the amount of waste ink sucked by the waste ink pump is much larger than the amount of waste ink leaking from the air communication hole, so that the inner diameter of the tube connecting portion 8 is as shown in FIGS. (That is, the diameter of the opening 8A) is formed larger than the inner diameter of the tube connecting portion 9 (that is, the diameter of the opening 9A).

  Next, as shown in FIGS. 1 and 3, the waste ink receiving portion 4 is formed so that the bottom surface 22 thereof is horizontal when the waste ink tank 1 is used. The waste ink discharged from 9A is distributed almost uniformly to the first storage unit 2 or the second storage unit 3, and the absorbent foam or the second storage unit in the first storage unit 2 through the communication port 21 or 20, respectively. 3 is absorbed into the absorbent foam.

  Further, at a position corresponding to the front of the opening 8A, in order to prevent scattering due to a large amount of waste ink being ejected from the opening 8A at a time, the waste ink receiving wall is parallel to the side wall where the opening 8A is formed. 10 is formed.

  Furthermore, the portion connecting the bottom surface 22 of the waste ink receiving portion 4 to the communication ports 20 and 21 is inclined toward the communication ports 20 and 21 at a height that is one step down from the horizontal bottom surface 22 with the boundary portion 24 as a boundary. The surface 23 is used. As a result, the waste ink that has flowed into the waste ink receiving portion 4 is more smoothly and quickly guided to the communication ports 20 and 21.

  Next, a state in which the absorbent foam is packed in the waste ink tank 1 whose structure has been described with reference to FIGS. 1 to 3 will be described with reference to a top view shown in FIG.

  As shown in FIG. 4, in the first storage unit 2, the absorbent foam 41 is used by filling all parts other than the partition walls 5 to 7. Then, the waste ink is gradually absorbed from the surface of the absorbent foam 41 facing the communication port 21, and finally is absorbed and stored in the entire absorbent foam 41 in the first storage unit 2, and is used for evaporation. The Rukoto.

  On the other hand, in the second storage unit 3, the absorbent foam 40 divided into three is packed over the entire interior of the second storage unit 3. At this time, since each of the absorbent foams 40 has a vertically long rectangular parallelepiped shape in the usage state of the waste ink tank 1, absorption of waste ink from the communication port 20 (absorption in the vertical vertical direction of the second storage unit 3). Will be done quickly.

  Specifically, as the material of each absorbent foam 40 and 41, for example, it is appropriate to form the absorbent foam 40 and 41 using felt or the like.

  Next, the state at the time of use of the waste ink tank 1 which concerns on 1st Embodiment is demonstrated using FIG. FIG. 5 is a perspective view showing the internal mechanism of the printer including the waste ink tank 1 (absorption forms 40 and 41 are not shown).

  As shown in FIG. 5, the printer P according to the embodiment includes a housing 36 in which a cartridge insertion port 35 into which a cartridge loaded with recording paper is inserted is opened at the lower front portion thereof. A paper feed mechanism 37, a recording head 38, and the like are incorporated in 36. And the waste ink tank 1 which concerns on 1st Embodiment is integrated in the back upper part of the housing | casing 36 so that the opening part in each of the 1st storage part 2 and the 2nd storage part 3 may face upwards. Further, the waste ink tank 1 is fixed to the housing 36 such that the lower portion of the second storage unit 3 is inserted into the rear right corner of the housing 36.

  As described above, according to the structure of the waste ink tank 1 according to the first embodiment, the first storage unit 2 which is shallow and has a wide opening as an evaporation port, and the first storage unit 2 which is deep and has a narrow opening as an evaporation port. Since the waste ink tank 1 is formed by the two storage units 3, it is possible to achieve both rapid evaporation of waste ink and effective storage of a large amount of waste ink in a narrow occupied space.

  Further, since the first storage unit 2 and the second storage unit 3 are connected by the bottom surface 22 and the inclined unit 23 in the waste ink receiving unit 4 that is horizontal in the use state, the waste ink is approximately evenly distributed to each storage unit. Can be introduced.

  Further, since the waste ink receiving wall 4 is provided with a waste ink receiving wall 10 facing the opening 8A through which the waste ink is discharged, each storage after the discharged waste ink hits the waste ink receiving wall 10 is provided. By flowing into the storage unit, the waste ink can flow into each storage unit smoothly and evenly.

  Furthermore, since the waste ink receiving wall 10 is provided at a position facing the opening 8A having a diameter larger than that of the opening 9A, even when a large amount of waste ink is ejected, the waste ink receiving wall 10 can smoothly flow into each storage unit. it can.

  The waste ink receiving wall 10 may be formed at least at a position facing the opening 8A. Besides this, for example, a waste ink receiving wall having a length from the opening 8A to the opening 9A is used. May be formed at a position facing the openings 8A and 9A, or may be formed at a position facing the waste ink receiving wall formed at a position facing the opening 8A and the opening 9A. It may be formed at a position where the waste ink receiving wall is separated and independent and faces each opening.

  Further, in the first storage unit 2, the plurality of partition walls 5 to 7 each having a T-shaped planar shape are arranged in a staggered manner, so that even if the waste ink tank 1 is inclined, the first storage unit 2 Since the water head pressure of the waste ink stored in the container is dispersed and reduced, the waste ink is difficult to overflow.

  Furthermore, since the inclined surface 23 which inclines toward the communicating surface 20 and the communicating surface 21 from the position where the waste ink is poured is formed on the bottom surface of the waste ink receiving portion 4, the waste ink flows smoothly into each storage portion. Can be made.

  Furthermore, since the continuous absorbent foam 41 is inserted in the space between the partition walls 5 to 7 in the first storage unit 2, the water head pressure between the partition walls 5 to 7 is reduced, Even if the waste ink tank 1 is inclined, the waste ink stored in the first storage unit 2 is difficult to overflow.

  Moreover, since the absorption form 40 divided | segmented into the perpendicular direction in the use condition is inserted in the 2nd storage part 3, waste ink can be swallowed to the said absorption form 40 rapidly.

(II) Second Embodiment Next, a second embodiment which is another embodiment according to the present invention will be described with reference to FIGS. 6 to 8, the same members as those shown in FIGS. 1 to 3 are denoted by the same member numbers, and detailed description thereof is omitted.

  In the first embodiment described above, the waste ink receiving wall 10 is provided in front of the opening 8A. However, the waste ink receiving wall 10 may be omitted to form a waste ink tank.

  That is, as shown in FIGS. 6 to 8, the waste ink tank 30 according to the second embodiment has the waste ink according to the first embodiment except that the waste ink receiving portion 31 without the waste ink receiving wall 10 is provided. It has the same structure as the tank 1.

  Even in the waste ink receiving portion 31 having such a structure, the waste ink can be smoothly guided to the communication ports 20 and 21 by providing the bottom surface 22 and the inclined surface 23.

  Even the waste ink tank 30 according to the second embodiment described above can achieve the same effects as the waste ink tank 1 according to the first embodiment described above, except for the portion related to the waste ink receiving wall 10.

  In addition, in each embodiment mentioned above, although the case where the planar shape of the partition walls 5 thru | or 7 was T-shaped was demonstrated, the planar shape of the partition walls 5 thru | or 7 other than this WHEREIN: The said planar shape is L-shaped. It may also be a curved saddle. Furthermore, even if the plate extending inward from the side wall in the longitudinal direction of the first storage unit 2 and inclined at a predetermined angle in the longitudinal direction is formed in a staggered pattern, the function as a partition wall can be exhibited. .

  As described above, the present invention is particularly suitable for use in an ink jet printer in which waste ink is generated. However, the present invention is not limited to the printer, and is a multifunction machine having an ink jet printing function (specifically, When applied to a multifunction machine in which functions such as a facsimile or a scanner are integrated in addition to the function as a printer, a particularly remarkable effect can be obtained.

FIG. 2 is an external perspective view of a waste ink tank according to the first embodiment, (a) is a schematic perspective view seen from the upper front side, and (b) is a perspective view seen from the upper rear side. It is a top view which shows the detailed structure of the waste ink tank itself which concerns on 1st Embodiment. FIG. 3 is an enlarged top view of a portion A in FIG. 2. It is a top view in the use condition of the waste ink tank concerning a 1st embodiment. It is an internal perspective view which shows the mounting state to the inkjet printer of the waste ink tank which concerns on 1st Embodiment. It is an external appearance perspective view of the waste ink tank concerning a 2nd embodiment, (a) is an outline perspective view seen from the front upper part, and (b) is a perspective view seen from the back upper part. It is a top view which shows the detailed structure of the waste ink tank itself which concerns on 2nd Embodiment. FIG. 8 is an enlarged top view of a portion B in FIG. 7.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,30 Waste ink tank 2 1st storage part 3 2nd storage part 4, 31 Waste ink receiving part 5, 6, 7 Partition wall 8, 9 Tube connection part 8A, 9A Opening part 10 Waste ink receiving wall 20, 21 Communication Port 22 Bottom surface 23 Inclined surface 24 Boundary portion 35 Cartridge insertion port 36 Housing 37 Paper feed mechanism 38 Recording head 40, 41 Absorbing foam

Claims (10)

A first storage unit that stores waste ink from the printer and has an upper surface opened as an evaporation port in a use state ;
Storing the waste ink, and a second storage part whose upper surface in the use state is opened as an evaporation port ;
A waste ink receiving said the first reservoir and connects the second storage unit and the waste ink is poured, and the first storage unit by the bottom surface of the horizontal in the usage state the second storage unit A waste ink receiving part for connecting the
Equipped with a,
The second storage part is formed deeper than the first storage part, and the opening area of the evaporation port in the second storage part is higher than the opening area of the evaporation port in the first storage part A waste ink tank characterized by being narrowed in view . The waste ink tank according to claim 1,
A waste ink tank, wherein the waste ink receiving portion is provided with a waste ink receiving wall at a position facing a discharge port through which the waste ink is discharged. The waste ink tank according to claim 2,
A first discharge port from which the waste ink is discharged, and a second discharge port having a diameter larger than that of the first discharge port,
The waste ink tank, wherein the waste ink receiving wall is provided at a position facing at least the second discharge port. The waste ink tank according to any one of claims 1 to 3,
Inside the first storage part, a plurality of partition walls extending inward from the longitudinal side wall of the first storage part are formed,
The partition walls are arranged in a staggered manner so that the waste ink is distributed to all the first storage units. The waste ink tank according to claim 4,
Each of the partition walls has a T-shaped planar shape, respectively. The waste ink tank according to claim 4,
Each of the partition walls has an L-shaped planar shape, respectively. The waste ink tank according to claim 4,
Each of the partition walls has a curved saddle-shaped planar shape, respectively. The waste ink tank according to any one of claims 1 to 7,
The waste ink receiving portion is formed with a first communication surface that communicates the waste ink receiving portion and the first storage portion, and a second communication surface that communicates the waste ink receiving portion and the second storage portion. Has been
The bottom surface is formed with an inclined surface that is inclined from the position where the waste ink is poured into the waste ink receiving portion toward the first communication surface and the second communication surface. tank. The waste ink tank according to any one of claims 4 to 7,
A waste ink tank, wherein a waste ink absorbing material for absorbing and holding the waste ink is inserted in a space between the partition walls in the first storage unit. The waste ink tank according to any one of claims 1 to 9,
A waste ink tank, wherein a waste ink absorbing material that is divided in the vertical direction and absorbs and holds the waste ink is inserted in the second storage unit.

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