JP6676920B2 - Ink tank - Google Patents

Description

  The present invention relates to an ink tank having an ink inlet.

  The printer performs printing by supplying ink from an ink tank. When the ink tank becomes empty due to the use of the ink, the ink is replenished by pouring the ink into the ink tank from the ink storage container storing the ink for replenishment. Patent Literature 1 discloses a liquid ejecting apparatus including this type of ink tank.

JP 2014-166709 A

  An ink tank in which ink is replenished from the ink container is provided with an ink injection port. In addition, a nozzle (ink ejection section) for injecting ink is provided in the ink storage container that stores the ink for replenishment. However, when pouring the ink from the nozzle into the ink inlet, if the position of the nozzle deviates from an appropriate position, the ink may be scattered outside the ink tank. Alternatively, when the ink flows out of the nozzle vigorously, the ink may be scattered outside the ink tank.

  SUMMARY OF THE INVENTION In view of the foregoing, an object of the present invention is to propose an ink tank in which ink is less likely to scatter outside the ink tank during an ink injection operation.

  In order to solve the above-mentioned problem, the present invention is an ink tank provided with an ink inlet for receiving ink, having an outer wall where the ink inlet is opened, and an opening edge of the ink inlet. A part of the first protruding wall, which has a larger protruding dimension from the outer wall than other portions of the opening edge, is provided.

  According to the present invention, a part of the opening edge of the ink injection port is a first protruding wall that protrudes higher than other parts. When such a first protruding wall is provided, the first protruding wall is located in front of the flow of the ink when the ink is poured toward the ink inlet from the opening edge lower than the first protruding wall. . Therefore, the ink poured into the ink inlet can be received by the first projecting wall, and the ink can flow into the ink tank along the first projecting wall. Therefore, there is little possibility that the ink is scattered outside the ink tank during the ink injection operation.

  In the present invention, it is preferable that at least a part of the other portion of the opening edge is provided with an inclined surface that descends toward the first protruding wall. With this configuration, the ink that has rebounded from the first protruding wall can be received on the inclined surface. Alternatively, the ink can be received on the inclined surface when the outflow direction of the ink is shifted or the momentum of the ink is weak. The ink received on the inclined surface flows down to the ink inlet through the inclined surface. Therefore, there is little possibility that the ink is scattered outside the ink tank during the ink injection operation.

  In the present invention, it is preferable that a second protruding wall facing the first protruding wall is provided on at least a part of the other portion of the opening edge, and the inclined surface is provided on the second protruding wall. . With this configuration, the ink that has rebounded from the first protruding wall can be received by the inclined surface of the second protruding wall, and the ink can flow into the ink tank along the inclined surface. Therefore, there is little possibility that the ink is scattered outside the ink tank during the ink injection operation.

  In the present invention, it is preferable that the inclined surface is a water-repellent surface. It is preferable that the inner peripheral surface of the first protruding wall is a water-repellent surface. In this case, the ink flows down into the ink tank without adhering to the inclined surface or the first protruding wall. Therefore, there is little possibility that the ink attached to the inclined surface or the first protruding wall falls into the ink tank in a state of being dried and solidified. Therefore, there is little possibility that foreign matter is mixed into the ink in the ink tank.

  In the present invention, it is preferable that a positioning portion for positioning an ink ejection portion of the ink container be provided at the opening edge. By doing so, there is little possibility that the ink ejection section is displaced from the ink injection port during the ink injection operation. Therefore, there is little possibility that the ink is scattered outside the ink tank during the ink injection operation.

  In the present invention, a cap that covers the opening edge and seals the ink inlet is provided, the opening edge is circular, and a tank-side screw portion is provided on an outer peripheral surface of the opening edge, and an inner peripheral surface of the cap is provided. It is preferable that a cap-side threaded portion to be engaged with the tank-side threaded portion is provided. By using such a cap, the ink inlet provided with the first protruding wall can be sealed. Therefore, it is possible to prevent foreign matters from entering the inside of the ink tank. Further, since the cap is not easily detached from the ink inlet, there is little possibility that the ink leaks from the ink inlet when the ink tank is turned down.

FIG. 2 is a perspective view of a liquid ejecting apparatus including the ink tank according to the first embodiment. FIG. 3 is a perspective view of the ink tank according to the first embodiment. FIG. 3 is an explanatory diagram illustrating a situation of ink injection into an ink tank according to the first embodiment. FIG. 9 is an explanatory diagram illustrating a modification of the ink tank according to the first embodiment. FIG. 9 is a partially enlarged view of an ink tank according to the second, third, and fourth embodiments. FIG. 10 is an explanatory diagram illustrating a state where an ink ejection unit is positioned in an ink tank according to a second embodiment. FIG. 14 is an explanatory diagram of an ink tank according to a fifth embodiment. FIG. 16 is a partially enlarged view of an ink tank according to a sixth embodiment.

  Hereinafter, an embodiment of an ink tank of the present invention will be described with reference to the drawings.

(Liquid ejector)
FIG. 1 is a perspective view of a liquid ejecting apparatus including the ink tank according to the first embodiment, and shows a state in which ink is being supplied to the ink tank. The liquid ejecting apparatus 1 is a multifunction device including an inkjet printer 5 and a scanner unit 6 that is disposed so as to overlap the upper portion of the inkjet printer 5. When the opening / closing lid 41 provided at the rear end of the upper surface of the liquid ejecting apparatus 4 is opened rearward, the paper supply port 42 is opened upward. The print medium P set in the paper supply port 42 is supplied to the inkjet printer 5 through the back of the scanner unit 6.

  An operation panel 43 is provided on the front surface of the liquid ejecting apparatus 4, and a discharge port 44 for discharging the print medium P is opened below the operation panel 43. Opening / closing covers 45 are provided on one side and the other side in the width direction of the discharge port 44, respectively. The opening / closing cover 45 can be opened forward centering on the lower end. The inkjet printer 5 includes the ink tank 2. When the opening / closing cover 45 is opened forward, the tank housing portion 46 in which the ink tank 2 is arranged is exposed to the outside. Two ink tanks 2 are arranged in each of the tank housing portions 46. The opening / closing cover 45 is provided with a window portion 47 so that the upper limit mark M1 and the lower limit mark M2 (see FIG. 2) provided on the lower front surface of the ink tank 2 can be visually recognized with the opening / closing cover 45 closed. ing. The window 47 is fitted with a transparent member.

  The liquid ejecting apparatus 4 includes a printing mechanism (not shown) disposed behind the operation panel 43 and the tank housing 46. The printing mechanism includes an inkjet head that ejects ink supplied from the ink tank 2, a medium transport mechanism that transports the print medium P supplied from the paper supply port 42 and discharges the print medium P from the discharge port 44, A head moving mechanism for moving the inkjet head in a direction intersecting the transport direction is provided. The printing mechanism performs printing on the printing medium P by discharging ink droplets from the inkjet head while changing the relative position of the inkjet head with respect to the printing medium P.

  When ink is used by printing or the like and the amount of ink stored in the ink tank 2 becomes smaller than the lower limit, the operation of refilling the ink from the ink storage container 3 to the ink tank 2 is performed. As shown in FIG. 1, an ink inlet 21 is provided at an upper portion of the front surface of the ink tank 2. On the other hand, the ink container 3 is provided with an ink discharging section 31 for pouring the ink stored therein to the outside. The operation of replenishing the ink in the ink tank 2 is performed by moving the ink ejection unit 31 of the ink container 3 toward the ink injection port 21 of the ink tank 2 via the ink injection unit 31 and the ink injection port 21. This is performed by injecting ink from the container 3 into the ink tank 2.

(Ink tank)
FIG. 2 is a perspective view of the ink tank 2 according to the first embodiment. The ink tank 2 according to the first embodiment is a hollow container including a case 22, an ink inlet 21 formed in the case 22, and an atmosphere opening part 23. An ink supply unit (not shown) for supplying ink to the inkjet head of the inkjet printer 5 is provided on the bottom surface or the rearward facing surface of the case 22.

  The case 22 includes a first wall 24 facing forward with the ink tank 2 disposed in the tank housing portion 46 of the liquid ejecting apparatus 4, and a second wall facing forward at a position above and behind the first wall 24. 25, and a third wall (outer wall) connecting the lower edge of the second wall 25 and the upper edge of the first wall 24. The third wall 26 is an inclined surface facing obliquely upward. The first wall 24 has an upper limit mark M1 indicating the upper limit of the ink amount and a lower limit mark M2 indicating the lower limit of the ink amount. The atmosphere opening portion 23 is formed on a fourth wall 27 located at the upper end of the case 22. When the ink in the ink tank 2 is supplied to the inkjet head side and the amount of ink decreases, air is introduced into the ink tank 2 from the atmosphere opening part 23.

  A circular ink inlet 21 is opened in the third wall 26 of the ink tank 2. A first protruding wall 29 protruding in a direction perpendicular to the third wall 26 is provided in a part of a circumferential direction of the opening edge 28 of the ink inlet 21. In the first embodiment, the protrusion dimension of the first protrusion wall 29 from the third wall 26 is constant. Further, the range of the opening edge 28 where the first protruding wall 29 is provided is a region of the upper half of the opening edge 28 inclined obliquely upward. On the other hand, the range of the opening edge 28 where the first protruding wall 29 is not provided is a lower half area of the opening edge 28. In this region, the opening edge 28 and the surface of the third wall 26 are connected without any step.

  FIG. 3 is an explanatory diagram illustrating a situation of ink injection into the ink tank 2 according to the first embodiment. The ink storage container 3 includes an ink pack 32 that can store ink, and an ink discharging section 31 provided at an edge of the ink pack 32. The ink pack 32 is formed in a bag shape with a flexible film. A notch 36 is provided at a corner of the ink pack 32. The ink discharging portion 31 is a portion where a cylindrical member is joined to the edge of the cutout portion 36 by heat welding or the like so that the ink can be discharged.

  As shown in FIG. 2, the first protruding wall 29 is a curved wall surrounding the upper half of the ink inlet 21 and projects obliquely forward above the ink inlet 21. When performing the ink replenishment operation, as shown in FIG. 3, the tip of the ink ejection section 31 of the ink container 3 is made to face the ink inlet 21 of the ink tank 2. It is preferable that the tip of the ink discharging section 31 be located below the upper end of the first protruding wall 29. In this state, when the ink is poured out from the ink discharging section 31, the ink is poured on the inner peripheral surface of the first protruding wall 29, so that the ink flows down the inner peripheral surface of the first protruding wall 29. Therefore, the ink is injected into the internal space of the ink tank 2 without spilling out of the ink injection port 21.

(Effects)
As described above, in the ink tank 2 of the first embodiment, a part of the opening edge 28 of the ink inlet 21 is the first protruding wall 29 that protrudes higher than the other parts of the opening edge 28. Therefore, ink can be poured toward the ink inlet 21 from the region of the opening edge 28 whose projection height is lower than the first projection wall 29. As described above, when the first protruding wall 29 is located on the front side in the ink pouring direction, the ink is applied to the first protruding wall 29, so that the ink flows into the ink tank 2 along the first protruding wall 29. Can be done. Therefore, there is little possibility that the ink is scattered outside the ink tank 2 during the ink injection operation.

(Modification of First Embodiment)
FIG. 4 is an explanatory diagram showing a modification of the ink tank 2 of the first embodiment. FIG. 4A is an explanatory diagram showing the state of ink injection into the ink tank 2A of the modification, and FIG. 4B is a partially enlarged view of the ink tank 2A of the modification. In the modified example, the ink inlet is provided not on the inclined surface of the ink tank but on a horizontal surface. The ink tank 2A of the modified example includes a case 22A and an ink inlet 21A provided on an upper wall 26A (outer wall) of the case 22A. The upper wall 26A of the case 22 is horizontal. The shape of the ink inlet 21A is the same as that of the first embodiment, and is different from the first embodiment only in that it is provided not on the inclined surface but on the horizontal surface. That is, the ink inlet 21A includes the first protruding wall 29A formed in a partial area of the opening edge 28A, and the other area of the opening edge 28A is connected to the upper wall 26A without any step.

  In the ink tank 2A of the modified example, as in the first embodiment, the ink can be replenished by pouring the ink from the ink outlet 31 of the ink container 3 to the ink inlet 21A. At this time, the ink poured from the ink discharging section 31 is poured onto the first protruding wall 29A located on the front side in the ink discharging direction as shown in FIG. 4B. Therefore, as in the first embodiment, ink can flow into the ink tank 2A along the first protruding wall 29A. Further, even if the ink bounces off the first protruding wall 29A, there is a high possibility that the ink will flow down inside the ink inlet 21A. Therefore, there is little possibility that the ink is scattered outside the ink tank 2A during the ink injection operation.

(Embodiment 2)
FIG. 5 is a partially enlarged view of the ink tank according to the second, third, and fourth embodiments. FIG. 5A shows an ink inlet 21B of the ink tank 2B of the second embodiment. The ink tank 2B of the second embodiment includes an ink inlet 21B provided on a horizontal upper wall 26B (outer wall), like the ink tank 2A of the modification. A first protruding wall 29B is formed on a part of the opening edge 28B of the ink injection port 21B in the circumferential direction, and a second protruding wall 60B is formed on another area. The first protruding wall 29B is a curved wall whose protruding height from the upper wall 26B is higher than the second protruding wall 60B. On the other hand, the second projecting wall 60B is formed so as to cover half of the ink inlet 21B, and faces the first projecting wall 29B across the ink inlet 21B. The upper end surface of the second protruding wall 60B is an inclined surface 61B that descends toward the first protruding wall 29B.

  In the ink tank 2B of the second embodiment, as in the above embodiments, the ink can be replenished by pouring the ink from the ink outlet 31 of the ink container 3 into the ink inlet 21B. At this time, the ink poured from the ink discharging section 31 is poured onto the first protruding wall 29B located on the front side in the ink discharging direction. Therefore, as in the above embodiments, ink can flow into the ink tank 2B along the first protruding wall 29B. Further, when the ink rebounds on the first protruding wall 29B, the rebounded ink is applied to the inclined surface 61B of the second protruding wall 60B, so that the ink flows down the ink tank 2B along the inclined surface 61B. Therefore, there is little possibility that the ink is scattered outside the ink tank 2B during the ink injection operation.

(Positioning of ink container with respect to ink spout)
FIG. 6 is an explanatory diagram showing a state where the ink ejection section 31B is positioned in the ink tank 2B of the second embodiment. The ink container for storing the replenishing ink is not limited to those shown in FIGS. 3 and 4, but may be of various shapes. For example, the ink container 3B shown in FIG. 6 is of a bottle type, and a nozzle type ink ejection section 31B is provided at the tip. A positioning protrusion 33B that protrudes in the radial direction is formed on the ink discharging portion 31B. The positioning projections 33B have a plate shape and are formed at two angular positions separated by 180 degrees. The edges of the two positioning projections 33B facing the nozzle tip end extend in a direction orthogonal to the center line of the ink ejection section 31B.

  The ink tank 2B according to the second embodiment includes a positioning unit 70B that positions the ink ejection unit 31B. The positioning portion 70B is a groove formed by the end edges 71B on both sides in the circumferential direction of the first protruding wall 29B and the inclined surface 61B of the second protruding wall 60B. That is, two groove-like positioning portions 70B are formed on the opening edge 28B of the ink inlet 21B. As shown in FIG. 6, when the positioning protrusions 33B of the ink discharging portion 31B are engaged with the two positioning portions 70B, the tip of the ink discharging portion 31B faces the inner peripheral surface of the first protruding wall 29. So that the ink discharging section 31B is positioned. Therefore, there is little possibility that the ink discharging section 31B is displaced from the ink inlet 21B. Therefore, there is little possibility that the ink is scattered outside the ink tank 2B during the ink injection operation.

(Embodiment 3)
FIG. 5B shows an ink inlet 21C of an ink tank 2C according to the third embodiment. The ink tank 2C according to the third embodiment includes an ink inlet 21C that opens on a horizontal upper wall 26C (outer wall). A first protruding wall 29C is formed in a part of the opening edge 28C of the ink inlet 21C in the circumferential direction. The other area of the opening edge 28C is connected to an inclined surface 61C provided at one end of the upper wall 26C. The inclined surface 61C is inclined in a direction of descending toward the first protruding wall 29C.

  In the ink tank 2C of the third embodiment, as in the above embodiments, ink can be replenished by pouring ink from the ink outlet 31 of the ink container 3 into the ink inlet 21C. At this time, the ink poured from the ink discharging section 31 is poured onto the first protruding wall 29C located on the front side in the ink discharging direction. Therefore, as in the above embodiments, the ink can flow into the ink tank 2C along the first protruding wall 29C, so that the ink is less likely to scatter outside the ink inlet. In addition, when the outflow direction of the ink from the ink discharging section 31 shifts or the momentum of the ink is weak, the ink can be received on the inclined surface 61C. Furthermore, when ink bounces off the first protruding wall 29C, the bounced ink can be received on the inclined surface 61C. The ink received on the inclined surface 61C flows down into the ink tank 2C along the inclined surface 61C. Therefore, there is little possibility that the ink is scattered outside the ink tank 2C during the ink injection operation.

(Embodiment 4)
FIG. 5C shows an ink inlet 21D of the ink tank 2D of the fourth embodiment. The ink tank 2D according to the fourth embodiment includes an ink inlet 21D that opens on a horizontal upper wall 26D (outer wall). A first protruding wall 29D is formed in the opening edge 28D of the ink inlet 21D in a part of the circumferential direction. A second protruding wall 60D lower than the first protruding wall 29D is formed in another region of the opening edge 28D. In the ink inlet 21D having such a shape, as in the above-described embodiments, the ink flows down to the ink inlet 21D along the first protruding wall 29D located on the front side in the ink pouring direction. Therefore, there is little possibility that the ink is scattered outside the ink tank 2D during the ink injection operation.

  When ink is replenished from the ink container 3B of the embodiment shown in FIG. 6, the positioning protrusion 33B of the ink discharging portion 31B can be placed on the upper edge 62D of the second projecting wall 60D. Then, the distal end of the positioning projection 33B is brought into contact with both edges 71D in the circumferential direction of the first protruding wall 29D. In this way, the ink discharging section 31B can be positioned at the ink inlet 21D. That is, in the ink tank 2D of the fourth embodiment, the upper end edge 62D of the second protruding wall 60D and the end edges 71D on both sides in the circumferential direction of the first protruding wall 29D are used as positioning portions for positioning the ink ejection portion 31B. Can work. Therefore, there is little possibility that the ink ejection section 31B is displaced from the ink injection port 21D.

(Embodiment 5)
FIG. 7 is an explanatory diagram of the ink tank 2E of the fifth embodiment. FIG. 7A is a perspective view of the ink tank 2E, and FIG. 7B is an explanatory diagram showing a state of ink injection into the ink tank 2E. The ink tank 2E of the fifth embodiment includes a third wall 26E (outer wall) which is inclined obliquely forward like the ink tank 2 of the first embodiment, and the third wall 26E is provided with an ink inlet 21E. . A first protruding wall 29E is formed in a part of the circumferential edge of the opening edge 28E of the ink inlet 21E, and a second protruding wall 60E is formed in another area of the opening edge 28E. The first protruding wall 29E is a curved wall whose protruding height from the third wall 26E is higher than the second protruding wall 60E.

  In the fifth embodiment, the range of the opening edge 28E in which the first protruding wall 29E is provided is a lower half region of the opening edge 28 that is inclined obliquely upward. On the other hand, the range of the opening edge 28E where the second protruding wall 60E is provided is a region in the upper half of the opening edge 28E. In the fifth embodiment, the ink is replenished from the ink container 3B including the nozzle-type ink ejection section 31B in which the positioning projections 33B are formed. At this time, as shown in FIG. 7 (b), the ink ejection section 31B is engaged with the ink injection port 21E by placing the positioning projections 33B on both circumferential edges 71E of the first protruding wall 29E. be able to. That is, in the fifth embodiment, both edges 71E in the circumferential direction of the first protruding wall 29E function as the positioning portions 70E. Accordingly, since the ink ejection section 31B can be positioned at the ink injection port 21E, there is little possibility that the ink ejection section 31B is displaced from the ink injection port 21E. Therefore, there is little possibility that the ink is scattered outside the ink tank 2E during the ink injection operation.

(Embodiment 6)
8A and 8B are explanatory views of an ink tank 2F according to the sixth embodiment. FIG. 8A shows a state in which a cap 80F is removed from an ink inlet 21F, and FIG. 8A shows a state in which the ink inlet 21F is sealed by a cap 80F. It shows the state where it was done. The ink tank 2F of the sixth embodiment includes an ink inlet 21F formed on a horizontal upper wall 26F (outer wall), and a cap 80F that can be attached to and detached from the ink inlet 21F. As with the ink inlet 21D of the fourth embodiment, the ink inlet 21F has a first protruding wall 29F formed in a partial area in the circumferential direction of the opening edge 28F, and the other area has a first protruding wall 29F. The lower second protruding wall 60F is formed.

  The cap 80F includes a cylindrical portion 81F whose upper end is closed, and an edge portion 82F provided along an opening edge of the cylindrical portion 81F. The edge portion 82F has a larger diameter than the cylindrical portion 81F, and a cap-side screw portion 83F is formed on the inner peripheral surface thereof. A tank-side screw portion 84F corresponding to the cap-side screw portion 83F is formed on the outer peripheral surface of the ink inlet 21F. The cap 80F can cover the first projecting wall 29F and the second projecting wall 60F from the outer peripheral side and from above. By engaging the cap-side screw portion 83F with the tank-side screw portion 84F, the ink inlet 21F is sealed by the cap 80F.

  In the sixth embodiment, since the ink injection port 21F includes the first protruding wall 29F, there is little possibility that the ink is scattered outside the ink tank 2F during the ink injection work as in the above embodiments. Further, by using the cap 80F, even when the first protruding wall 29F is provided, the ink inlet 21F can be sealed. Therefore, it is possible to prevent foreign matters from entering the inside of the ink tank 2F. Further, since the cap 80F is not easily detached from the ink inlet 21F, there is little possibility that the ink leaks from the ink inlet 21F when the ink tank 2F is folded down.

  The same member as the cap 80F may be applied to another form of the ink injection port to make the ink injection port hermetically sealable. In this case, it is desirable that a protruding portion be provided over the front range in the circumferential direction of the opening edges 28B, 28E, like the ink injection ports 21B, 21E of the second and fifth embodiments.

  Here, in each of the above embodiments, it is desirable that the inner peripheral surfaces of the first protruding walls 29 to 29F be water-repellent surfaces. In the case where the inclined surfaces 61B and 61C for receiving ink are provided, it is desirable that these surfaces be water-repellent surfaces. In this case, the ink flows down without adhering to the first protruding walls 29 to 29F, the inclined surface 61B, and the inclined surface 61C. Therefore, there is little possibility that the ink attached to the first protruding walls 29 to 29F, the inclined surfaces 61B, and the inclined surfaces 61C dries and falls into the ink tanks 2 to 2F. Therefore, there is little possibility that foreign matter is mixed in the ink in the ink tanks 2 to 2F. If the amount of foreign matter mixed into the ink is small, the filter provided in the ink tank is less likely to be clogged, so that the frequency of replacing the filter can be reduced.

  In each of the above-described embodiments, the range in which the first protruding walls 29 to 29F are provided is preferably a range that is equal to or more than の う ち of the entire circumference of the opening edges 28 to 28F. In this way, when the ink inlets 21 to 21F are viewed in the ink injection direction, the first protruding walls 29 to 29F can be arranged over the entire range in the width direction of the ink inlets 21 to 21F. Therefore, there is little possibility that the ink will spill outside of the ink inlets 21 to 21F when the ink is injected.

DESCRIPTION OF SYMBOLS 1 ... Liquid ejecting apparatus, 2, 2A, 2B, 2C, 2D, 2E, 2F ... Ink tank, 3, 3B ... Ink container, 4 ... Liquid ejecting apparatus, 5 ... Inkjet printer, 6 ... Scanner unit, 21 and 21A , 21B, 21C, 21D, 21E, 21F: ink inlet, 22, 22A: case, 23: atmosphere opening part, 24: first wall, 25: second wall, 26, 26E: third wall (outer wall), 26A, 26B, 26C, 26D, 26F: Upper wall (outer wall), 27: Fourth wall, 28, 28A, 28B, 28C, 28D, 28E, 28F: Opening edge, 29, 29A, 29B, 29C, 29D, 29E , 29F: first protruding wall, 31, 31B: ink ejection section, 32: ink pack, 33B: positioning projection, 36: notch, 41: open / close lid, 42: paper supply port, 43: operation panel , 44 ... outlet, 45 ... opening / closing cover, 46 ... tank housing part, 47 ... window part, 60B, 60D, 60E, 60F ... second protruding wall, 61B, 61C ... inclined surface, 62D ... upper edge, 70B, 70E ... Positioning parts, 71B, 71D, 71E ... Edge, 80F ... Cap, 81F ... Cylinder part, 82F ... Edge part, 83F ... Cap side screw part, 84F ... Tank side screw part, M1 ... Upper limit mark, M2 ... Lower limit mark , P: print medium.

Claims (9)

Ink is injected from an ink container having an ink discharging section for discharging ink, and a positioning projection provided on the ink discharging section and extending in a direction orthogonal to a center line of the ink discharging section. An ink tank containing the ink,
An ink inlet for receiving the injection of the ink from the ink container ,
An outer wall on which the ink inlet is open,
The part of the opening edge of the ink inlet, the first protruding wall is provided projecting large size from the outer wall than other portions of the opening edge,
The first projecting wall has an edge along a direction in which the first projecting wall projects,
When the ink is injected into the ink tank, the positioning protrusion of the ink storage container is provided so as to contact the edge,
Ink tank.   A second protruding wall facing the first protruding wall is provided on at least a part of the other portion of the opening edge,
  A projecting dimension of the second projecting wall is shorter than a projecting dimension of the first projecting wall;
  The ink tank according to claim 1.   The upper edge of the second projecting wall is inclined at an acute angle with respect to the edge of the first projecting wall,
  When the ink is injected into the ink tank, the positioning protrusion of the ink container is inserted into a groove formed by the edge and the upper edge,
  The ink tank according to claim 2.   An ink injection port for receiving ink injection; and an outer wall on which the ink injection port is opened. A part of the opening edge of the ink injection port protrudes from the outer wall more than the other part of the opening edge. An ink container for injecting the ink into an ink tank, the first protrusion wall having a large dimension being provided, the first protrusion wall having an edge along a direction in which the first protrusion wall protrudes; ,
  An ink discharging unit for discharging the ink,
  A positioning projection provided on the ink ejection section and extending in a direction orthogonal to a center line of the ink ejection section,
  When the ink is injected into the ink tank, the positioning protrusion of the ink storage container is provided so as to contact the edge,
  Ink storage container.   A second protruding wall facing the first protruding wall is provided on at least a part of the other portion of the opening edge,
  A projecting dimension of the second projecting wall is shorter than a projecting dimension of the first projecting wall;
  The ink container according to claim 4.   The upper edge of the second projecting wall is inclined at an acute angle with respect to the edge of the first projecting wall,
  When the ink is injected into the ink tank, the positioning protrusion of the ink container is inserted into a groove formed by the edge and the upper edge,
  An ink container according to claim 5.   An ink tank for storing ink,
  An ink storage container that stores the ink to be injected into the ink tank,
  The ink tank has an ink inlet for receiving the injection of the ink from the ink container, and an outer wall where the ink inlet is opened,
  A first protruding wall having a larger protruding dimension from the outer wall than another portion of the opening edge is provided on a part of the opening edge of the ink injection port,
  The first projecting wall has an edge along a direction in which the first projecting wall projects,
  The ink storage container is provided at the ink discharge unit, where the ink stored in the ink storage container is discharged, and a direction perpendicular to a center line of the ink discharge unit. And a positioning projection extending to
  When the ink is injected into the ink tank, the positioning protrusion of the ink storage container is provided so as to contact the edge,
  Ink supply system.   A second protruding wall facing the first protruding wall is provided on at least a part of the other portion of the opening edge,
  A projecting dimension of the second projecting wall is shorter than a projecting dimension of the first projecting wall;
  The ink supply system according to claim 7.   The upper edge of the second projecting wall is inclined at an acute angle with respect to the edge of the first projecting wall,
  When the ink is injected into the ink tank, the positioning protrusion of the ink container is inserted into a groove formed by the edge and the upper edge,
  An ink supply system according to claim 8.

Images