CN206394243U - Ink tank - Google Patents

Abstract

The utility model provides a kind of ink tank of liquid injection apparatus, and above-mentioned ink tank supplements ink from ink accepting container.In ink tank, the 1st highlighted wall that a part for the edge of opening of ink inlet is protruded with forming the other parts for being higher than edge of opening.According to the structure, ink can be injected from region of the projecting height less than the edge of opening of the 1st highlighted wall to ink inlet, now, the 1st highlighted wall is located at the front side that ink pours out direction.Therefore, it is possible to make ink flow into ink inlet along the 1st highlighted wall, therefore ink is difficult to disperse to the outside of ink inlet.Therefore, the possibility dispersed to outside ink tank in the injection operation ink inside of ink is smaller.

Description

ink tank

technical field

The utility model relates to an ink tank with an ink injection port.

Background technique

The printer performs printing by supplying ink from an ink tank. When the ink tank becomes empty due to the use of ink, ink is filled into the ink tank from an ink storage container storing ink for replenishment to be replenished. Patent Document 1 discloses a liquid ejecting device having such an ink tank.

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2014-166709

Utility model content

An ink filling port is provided in the ink tank for replenishing ink from the ink storage container. In addition, a nozzle (ink pouring unit) for pouring ink is provided in the ink storage container for storing ink for replenishment. However, when the ink is poured from the nozzle to the ink inlet, if the position of the nozzle deviates from an appropriate position, the ink may scatter to the outside of the ink tank. Or, in the case where ink is jetted out from the nozzle, the ink may scatter to the outside of the ink tank.

In view of the above points, an object of the present invention is to provide an ink tank in which ink does not easily scatter to the outside of the ink tank during ink injection work.

In order to solve the above-mentioned technical problems, the technical feature of the utility model is: an ink tank having an ink injection port for accepting ink injection, the above-mentioned ink injection port has an open outer wall, and the first protruding wall is arranged on a part of the opening edge of the above-mentioned ink injection port A dimension of the protrusion of the first protruding wall from the outer wall is larger than other parts of the edge of the opening.

According to the present invention, a part of the opening edge of the ink injection port forms the first protruding wall protruding higher than the other part. If such a first protruding wall is provided, when ink is injected into the ink inlet from a portion lower than the edge of the opening of the first protruding wall, the first protruding wall is located on the front side of the ink flow. Therefore, the ink injected into the ink inlet can be received by the first protruding wall, and the ink can flow into the ink tank along the first protruding wall. Therefore, the ink is less likely to scatter to the outside of the ink tank during the ink filling operation.

In the present invention, it is preferable that an inclined surface descending toward the first protruding wall side is provided on at least a part of the other portion of the edge of the opening. If provided in this manner, the ink splashed from the first protruding wall can be received by the inclined surface. Alternatively, the ink can be received by the inclined surface when the outflow direction of the ink deviates and the flow force of the ink is small. The ink received by the inclined surface falls into the ink injection port along the inclined surface. Therefore, the ink is less likely to scatter to the outside of the ink tank during the ink filling operation.

In the present invention, it is preferable that a second protruding wall opposing the first protruding wall is provided on at least a part of the other portion of the edge of the opening, and the inclined surface is provided on the second protruding wall. With this arrangement, the ink splashed from the first protruding wall can be received by the inclined surface of the second protruding wall, so that the ink can flow into the ink tank along the inclined surface. Therefore, the ink is less likely to scatter to the outside of the ink tank during the ink filling operation.

In the present utility model, the above-mentioned inclined surface is preferably a waterproof surface. Moreover, it is preferable that the inner peripheral surface of the said 1st protrusion wall is a waterproof surface. In such a configuration, ink will fall into the ink tank without adhering to the inclined surface or the first protruding wall. Therefore, there is little possibility that the ink adhering to the inclined surface or the first protruding wall will fall into the ink tank in a dried and solid state. Therefore, there is less possibility of foreign matter being mixed into the ink in the ink tank.

In the present invention, preferably, a positioning portion for positioning the ink pouring portion of the ink storage container is provided on the edge of the opening. If provided in this manner, there is less possibility that the ink pouring portion will deviate from the ink injection port during the ink injection operation. Therefore, the ink is less likely to scatter to the outside of the ink tank during the ink filling operation.

In the present invention, it is preferable to have a cap that covers the edge of the opening and seals the ink injection port. There is a lid-side threaded portion engaged with the above-mentioned can-side threaded portion. By using such a cap, the ink injection port having the first protruding wall can be sealed. Therefore, it is possible to prevent foreign matter from entering the inside of the ink tank. In addition, since the cap is difficult to come off from the ink inlet, ink is less likely to leak from the ink inlet when the ink tank is knocked down or the like.

Description of drawings

1 is a perspective view of a liquid ejecting device having an ink tank according to a first embodiment

Fig. 2 is a perspective view of the ink tank of the first embodiment

FIG. 3 is an explanatory diagram showing a state of filling ink into the ink tank according to the first embodiment.

FIG. 4 is an explanatory view showing a modified example of the ink tank of the first embodiment.

Fig. 5 is a partially enlarged view of ink tanks according to the second, third and fourth embodiments.

FIG. 6 is an explanatory view showing a state where an ink pouring portion is positioned in an ink tank according to a second embodiment.

Fig. 7 is an explanatory diagram of an ink tank according to a fifth embodiment.

Fig. 8 is a partially enlarged view of an ink tank according to a sixth embodiment.

detailed description

Hereinafter, with reference to the accompanying drawings, the embodiment of the ink tank of the present utility model will be described.

(liquid injection device)

FIG. 1 is a perspective view of a liquid ejecting device having an ink tank according to a first embodiment, showing a state in which ink is replenished to the ink tank. The liquid ejecting device 4 is a multifunctional peripheral including an inkjet printer 5 and a scanner unit 6 arranged to overlap the inkjet printer 5 . When the opening and closing cover 41 provided on the rear end of the upper surface of the liquid ejecting device 4 is opened rearward, the paper supply port 42 opens upward. The printing medium P placed in the paper supply port 42 is supplied to the inkjet printer 5 through the rear of the scanner unit 6 .

An operation panel 43 is provided on the front surface of the liquid ejecting device 4 , and a discharge port 44 for discharging the printing medium P opens below the operation panel 43 . Opening and closing covers 45 are respectively provided on one side and the other side in the width direction of the discharge port 44 . The opening and closing cover 45 can be opened forward centering on the lower end. The inkjet printer 5 has an ink tank 2 . When the opening and closing cover 45 is opened forward, the tank accommodating part 46 in which the ink tank 2 is arranged is exposed to the outside. Two ink tanks 2 are arranged for each tank housing portion 46 . The opening and closing cover 45 is provided with a window portion 47 for enabling the upper limit mark M1 and the lower limit mark M2 (refer to FIG. 2 ) provided on the lower front surface of the ink tank 2 to be visible when the opening and closing cover 45 is closed. Confirmed by observation. A transparent member is fitted into the window portion 47 .

The liquid ejecting device 4 has a printing mechanism unit (not shown) disposed behind the operation panel 43 and the tank housing unit 46 . The printing mechanism section has an inkjet head, a medium conveying mechanism, and a nozzle moving mechanism; the inkjet head ejects the ink supplied from the ink tank 2, and the medium conveying mechanism conveys the printing medium P supplied from the paper supply port 42 The inkjet head is discharged from the discharge port 44, and the head moving mechanism moves the inkjet head in a direction intersecting with the conveying direction of the printing medium P. The printing mechanism section performs printing on the printing medium P by ejecting 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 for printing and the amount of ink stored in the ink tank 2 becomes less than the lower limit, ink is replenished from the ink storage container 3 to the ink tank 2 . As shown in FIG. 1 , an ink injection portion 21 is provided on the upper front surface of the ink tank 2 . On the other hand, the ink storage container 3 is provided with an ink pouring portion 31 for pouring the ink stored inside to the outside. The ink replenishment operation to the ink tank 2 is carried out in the following manner: the ink pouring part 31 of the ink storage container 3 is directed towards the ink injection part 21 of the ink tank 2, and the ink is poured from the ink pouring part 31 and the ink injection part 21. The ink container 3 is filled into the ink tank 2 .

(ink tank)

FIG. 2 is a perspective view of the ink tank 2 of the first embodiment. The ink tank 2 of the first embodiment is a hollow container having a case body 22 and an ink injection portion 21 and an atmosphere opening portion 23 formed in the case body 22 . 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 surface of the case 22 .

The case 22 has a first wall 24 facing forward when the ink tank 2 is placed in the tank accommodating portion 46 of the liquid ejection device 4 , a second wall 25 facing forward at a position above and behind the first wall 24 , and The third wall 26 (outer wall) connecting the lower end edge of the second wall 25 and the upper end edge of the first wall 24 . The third wall 26 is an inclined surface facing obliquely upward. 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 are attached to the first wall 24 . The atmosphere opening portion 23 is formed on the fourth wall 27 located at the upper end of the case body 22 . When the ink in the ink tank 2 is supplied to the inkjet head side to reduce the amount of ink, air is introduced into the ink tank 2 from the atmosphere opening portion 23 .

The circular ink inlet 21 is opened on the third wall 26 of the ink tank 2 . A first protruding wall 29 that protrudes in a direction perpendicular to the third wall 26 is provided within a part of the range in the circumferential direction of the opening edge 28 of the ink injection port 21 . In the first embodiment, the protrusion dimension of the first protrusion wall 29 from the third wall 26 is constant. In addition, the range of the opening edge 28 where the first protruding wall 29 is provided is an area of the upper half of the opening edge 28 that is inclined obliquely upward. On the other hand, the range of the opening edge 28 where the first protruding wall 29 is not provided is the region of the lower half of the opening edge 28 . In this region, the opening edge 28 is connected to the surface of the third wall 26 without gaps.

FIG. 3 is an explanatory view showing a state of filling ink into the ink tank 2 of the first embodiment. The ink storage container 3 has an ink bag 32 capable of storing ink, and an ink pouring portion 31 provided on the edge of the ink bag 32 . The ink bag 32 is formed in a bag shape from a flexible film. Cutouts 36 are formed at corners of the ink pack 32 . The ink pouring portion 31 is a portion where ink can be poured out by joining the cylindrical member to the edge of the notch portion 36 by heat welding or the like.

As shown in FIG. 2 , the first protruding wall 29 is a curved wall surrounding the upper half of the ink injection port 21 , and protrudes obliquely forward above the ink injection port 21 . As shown in FIG. 3 , when the ink is replenished, the front end of the ink pouring portion 31 of the ink container 3 faces the ink inlet 21 of the ink tank 2 . The tip of the ink pouring portion 31 is preferably located below the upper end of the first protruding wall 29 . In this state, when the ink is poured out from the ink pouring portion 31 , since the ink is poured into the inner peripheral surface of the first protruding wall 29 , the ink flows down along the inner peripheral surface of the first protruding wall 29 . Therefore, ink is injected into the inner space of the ink tank 2 without spilling outside the ink inlet 21 .

(Effect)

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 formed as the first protruding wall 29 that protrudes higher than the other part of the opening edge 28 . Therefore, ink can be injected into the ink injection port 21 from a region whose protrusion height is lower than the opening edge 28 of the first protrusion wall 29 . In this way, when the first protruding wall 29 is located on the front side in the pouring direction of the ink, the ink falls on the first protruding wall 29 , so that the ink can flow into the ink tank 2 along the first protruding wall 29 . Therefore, the ink is less likely to scatter to the outside of the ink tank 2 during the ink filling operation.

(Modification of the first embodiment)

FIG. 4 is an explanatory diagram showing a modified example of the ink tank 2 of the first embodiment. FIG. 4( a ) is an explanatory diagram showing a state of injecting ink into an ink tank 2A of a modified example, and FIG. 4( b ) is a partially enlarged view of an ink tank 2A of a modified example. The modified example is an example in which the ink inlet is provided on the horizontal plane of the ink tank instead of the inclined plane. An ink tank 2A according to a modified example has a case body 22A and an ink inlet 21A provided on an upper wall 26A (outer wall) of the case body 22A. The upper wall 26A of the box body 22 is horizontal. The shape of the ink inlet 21A is the same as that of the first embodiment, and differs from the first embodiment only in that it is provided on a horizontal plane instead of an inclined plane. That is, the ink injection port 21A has the first protruding wall 29A formed in a part of the opening edge 28A, and the other area of the opening edge 28A is continuous with the upper wall 26A without a gap.

In the ink tank 2A of the modified example, as in the first embodiment, ink can be replenished by injecting ink from the ink pouring portion 31 of the ink container 3 into the ink inlet 21A. As shown in FIG. 4( b ), at this time, the ink poured from the ink pouring portion 31 is poured into the first protruding wall 29A located on the front side in the pouring direction of the ink. Therefore, like the first embodiment, ink can flow into the ink tank 2 along the first protruding wall 29 . In addition, even if ink splashes on the first protruding wall 29A, there is a high possibility that the ink will flow down inside the ink injection port 21A. Therefore, the ink is less likely to scatter to the outside of the ink tank 2 during the ink filling operation.

(second embodiment)

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

In the ink tank 2B of the second embodiment, as in the above-described embodiments, ink can be filled from the ink pouring portion 31 into the ink inlet 21B to replenish the ink. At this time, the ink poured from the ink pouring portion 31 is poured into the first protruding wall 29B located on the front side in the pouring direction of the ink. Therefore, similarly to the above-described embodiments, ink can flow into the ink tank 2B along the first protruding wall 29B. Also, when ink splashes on the first protruding wall 29B, the splashed ink falls on the inclined surface 61B of the second protruding wall 60B, so the ink falls into the ink tank 2B along the inclined surface 61B. Therefore, the ink is less likely to scatter to the outside of the ink tank 2B during the ink filling operation.

(Positioning of the ink container relative to the ink outlet)

FIG. 6 is an explanatory view showing a state where the ink pouring portion 31B is positioned in the ink tank 2B of the second embodiment. The ink storage container for storing ink for replenishment is not limited to the container shown in FIGS. 3 and 4 , and containers of various shapes may be used. For example, the ink container 3B shown in FIG. 6 is bottle-shaped, and a nozzle-shaped ink pouring portion 31B is provided at the front end. A positioning protrusion 33B protruding in the radial direction is formed on the ink pouring portion 31B. The positioning protrusions 33B are plate-shaped and formed at two angular positions 180 degrees apart. The end edges of the two positioning protrusions 33B facing the nozzle tip side extend in a direction perpendicular to the centerline of the ink pouring portion 31B.

The ink tank 2B of the second embodiment has a positioning portion 70B for positioning the ink pouring portion 31B. The positioning portion 70B is a groove formed by end edges 71B on both sides of the first protruding wall 29B in the circumferential direction and the inclined surface 61B of the second protruding wall 60B. That is, two groove-shaped positioning portions 70B are formed on the opening edge 28B of the ink injection port 21B. As shown in FIG. 6, if the positioning protrusions 33B of the ink pouring part 31B are respectively engaged with the two positioning parts 70B, the ink pouring part 31B will be aligned with the inside of the first protruding wall 29 with the front end of the ink pouring part 31B. The peripheral faces are positioned in a relative manner. Therefore, there is little possibility that the ink pouring portion 31B is displaced from the ink injection port 21B. Therefore, the ink is less likely to scatter to the outside of the ink tank 2B during the ink filling operation.

(third embodiment)

FIG. 5(b) shows the ink inlet 21C of the ink tank 2C of the third embodiment. The ink tank 2C of the third embodiment has an ink inlet 21C opened to a horizontal upper wall 26C (outer wall). A first protruding wall 29C is formed in a part of the circumferential direction of the opening edge 28C of the ink injection port 21C. The other area of the opening edge 28C is connected to an inclined surface 61C provided at one end of the upper wall 26C. 61 C of inclined surfaces incline in the direction which descends toward the 1st protrusion wall 29C side.

In the ink tank 2C of the third embodiment, as in the above-described embodiments, ink can be filled from the ink pouring portion 31 of the ink container 3 into the ink inlet 21C to replenish the ink. At this time, the ink poured from the ink pouring portion 31 is poured into the first protruding wall 29C located on the front side in the pouring direction of the ink. Therefore, similarly to the above-described embodiments, since the ink can flow into the ink tank 2C along the first protruding wall 29C, it is difficult for the ink to scatter to the outside of the ink inlet. In addition, when the outflow direction of the ink from the ink pouring portion 31 deviates and the water force of the ink is low, the ink can be received by the inclined surface 61C. Furthermore, when ink splashes on the first protruding wall 29C, the splashed ink can be received by the inclined surface 61C. The ink received by the inclined surface 61C falls into the ink tank 2C along the inclined surface 61C. Therefore, the ink is less likely to scatter to the outside of the ink tank 2C during the ink filling operation.

(fourth embodiment)

FIG. 5( c ) shows the ink inlet 21D of the ink tank 2D of the fourth embodiment. The ink tank 2D of the fourth embodiment has an ink inlet 21D opened to a horizontal upper wall 26D (outer wall). A first protruding wall 29D is formed in a part of the circumferential direction of the opening edge 28D of the ink injection port 21D. 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, ink falls into the ink inlet 21D along the first protruding wall 29D located on the front side in the ink pouring direction, as in the above-described embodiments. Therefore, the ink is less likely to scatter to the outside of the ink tank 2D during the ink filling operation.

Moreover, when replenishing ink from the ink container 3B of the embodiment shown in FIG. Then, the front end of the positioning protrusion 33B is brought into contact with the end edges 71D on both sides in the circumferential direction of the first protruding wall 29D. If provided in this way, the ink pouring part 31B can be positioned at the ink injection port 21D. That is, in the ink tank 2D of the fourth embodiment, the upper 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 can be used as positioning portions for positioning the ink pouring portion 31B. Play a role. Therefore, there is little possibility that the ink pouring portion 31B will be displaced from the ink injection port 21D.

(fifth embodiment)

FIG. 7 is an explanatory diagram of an ink tank 2E of the fifth embodiment. FIG. 7( a ) is a perspective view of the ink tank 2E, and FIG. 7( b ) is an explanatory diagram showing a state of injecting ink into the ink tank 2E. The ink tank 2E of the fifth embodiment has the same third wall 26E (outer wall) inclined obliquely forward as the ink tank 2 of the first embodiment, and an ink inlet 21E is provided on the third wall 26E. In the opening edge 28E of the ink injection port 21E, a first protruding wall 29E is formed in a part of the circumferential direction, and a second protruding wall 60E is formed in the other 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 that of the second protruding wall 60E.

In the fifth embodiment, the range of the opening edge 28E where the first protruding wall 29E is provided is the region of the lower half of the opening edge 28 in a state inclined obliquely upward. On the other hand, the range of the opening edge 28E where the second protruding wall 60E is provided is the upper half of the opening edge 28E. In the fifth embodiment, ink is replenished from an ink container 3B having a nozzle-shaped ink pouring portion 31B in which a positioning protrusion 33B is formed. At this time, as shown in FIG. 7( b ), the ink pouring portion 31B can be engaged with the ink inlet 21E by placing the positioning protrusions 33B on the end edges 71E on both sides in the circumferential direction of the first protruding wall 29E. That is, in the fifth embodiment, the end edges 71E on both sides in the circumferential direction of the first protruding wall 29E function as the positioning portion 70E. Therefore, since the ink pouring portion 31B can be positioned at the ink injection port 21E, the ink pouring portion 31B is less likely to be displaced from the ink injection port 21E. Therefore, the ink is less likely to scatter to the outside of the ink tank 2E during the ink filling operation.

(sixth embodiment)

8 is an explanatory diagram of an ink tank 2F according to the sixth embodiment. FIG. 8(a) shows a state where the cap 80F is removed from the ink inlet 21F, and FIG. 8(b) shows a state where the ink inlet 21F is sealed by the cap 80F. . The ink tank 2F of the sixth embodiment has an ink inlet 21F formed in a horizontal upper wall 26F (outer wall), and a cap 80F detachable from the ink inlet 21F. The ink injection port 21F is the same as the ink injection port 21D of the fourth embodiment. A first protruding wall 29F is formed in a part of the circumferential direction of the opening edge 28F, and a second protrusion lower than the first protruding wall 29F is formed in the other area. Wall 60F.

The cap 80F has a cylindrical portion 81F whose upper end is closed, and an edge portion 82F provided along the opening edge of the cylindrical portion 81F. The edge portion 82F has a larger diameter than the cylindrical portion 81F, and a cap-side threaded portion 83F is formed on its inner peripheral surface. A tank-side threaded portion 84F corresponding to the cap-side threaded portion 83F is formed on the outer peripheral surface of the ink injection port 21F. The cover 80F can cover the 1st protrusion wall 29F and the 2nd protrusion wall 60F from the outer peripheral side and upper direction. The ink injection port 21F is sealed by the cap 80F by engaging the cap-side threaded portion 83F with the tank-side threaded portion 84F.

In the sixth embodiment, since the ink injection port 21F has the first protruding wall 29F, similar to the above-described embodiments, the ink is less likely to scatter to the outside of the ink tank 2F during the ink injection operation. In addition, by using the cap 80F, the ink injection port 21F can be sealed even when the first protrusion wall 29F is provided. Therefore, foreign matter can be prevented from entering the inside of the ink tank 2F. In addition, since the cap 80F is difficult to come off from the ink inlet 21F, there is less possibility of ink leaking from the ink inlet 21F when the ink tank 2F is knocked down or the like.

It should be noted that the same member as the cap 80F may be applied to the ink injection port of other embodiments, and the ink injection port may be provided so as to be able to be sealed. In this case, like the ink injection ports 21B and 21E of the second and fifth embodiments, it is preferable to provide a protrusion over the entire range of the opening edge 28B and 28E in the circumferential direction.

Here, in each of the above-described embodiments, it is preferable to make the inner peripheral surfaces of the first protruding walls 29 to 29F a waterproof surface. Moreover, when providing the inclined surface 61B, 61C, etc. which receive ink, it is preferable to make these surfaces into waterproof surfaces. If provided in this way, the ink will flow down without adhering to the first protruding walls 29 to 29F or the inclined surfaces 61B and 61C. Therefore, there is little possibility that the ink adhering to the first protruding walls 29 to 29F or the inclined surfaces 61B and 61C will fall into the ink tanks 2 to 2F after drying. Therefore, there is little possibility of foreign matter being mixed into the ink in the ink tanks 2 to 2F. If foreign substances are less mixed into the ink, the filter provided in the ink tank is less likely to be clogged, and thus the frequency of replacement of the filter can be reduced.

In addition, in each of the above-mentioned embodiments, the range where the first protruding walls 29 to 29F are provided is preferably a range of 1/2 or more of the circumference of the opening edges 28 to 28F. With such arrangement, when the ink injection ports 21 to 21F are viewed along the ink injection direction, the first protruding walls 29 to 29F can be arranged across the entire range in the width direction of the ink injection ports 21 to 21F. Therefore, when the ink is injected, there is little possibility that the ink will spill outside the ink injection ports 21 to 21F.

Symbol Description

1...Liquid ejection device, 2, 2A, 2B, 2C, 2D, 2E, 2F...Ink tank, 3, 3B...Ink container, 4...Liquid ejection device, 5...Inkjet printer, 6...Scanner unit, 21 . outer wall), 26A, 26B, 26C, 26D, 26F...upper wall (outer wall), 27...4th wall, 28, 28A, 28B, 28C, 28D, 28E, 28F...opening edge, 29, 29A, 29B, 29C, 29D, 29E, 29F...First protruding wall, 31, 31B...Ink pouring part, 32...Ink bag, 33B...Positioning protrusion, 36...Notch part, 41...Open and close cover, 42...Paper supply port, 43... Operation panel, 44...discharge port, 45...opening and closing cover, 46...tank storage section, 47...window section, 60B, 60D, 60E, 60F...second protruding wall, 61B, 61C...inclined surface, 62D...top edge, 70B, 70E...positioning part, 71B, 71D, 71E...end edge, 80F...cap, 81F...cylindrical part, 82F...edge part, 83F...cap side thread part, 84F...can side thread part, M1...upper limit mark , M2...lower limit mark, P...printed media.

Claims (7)

1. An ink tank having an ink inlet for receiving ink, The ink tank has an outer wall in which the ink injection port forms an opening, A part of the edge of the opening of the ink inlet is provided with a first protruding wall, and the dimension of the first protruding wall protruding from the outer wall is larger than other parts of the edge of the opening. 2. The ink tank according to claim 1, wherein: At least a portion of the other portion of the edge of the opening is provided with an inclined surface that descends toward the first protruding wall side. 3. The ink tank according to claim 2, wherein: A second protruding wall opposite to the first protruding wall is provided on at least a part of the other portion of the edge of the opening, The inclined surface is provided on the second protruding wall. 4. The ink tank according to claim 2 or 3, wherein the inclined surface is a waterproof surface. 5. The ink tank according to claim 1 or 2, wherein the inner peripheral surface of the first protruding wall is a waterproof surface. 6. The ink tank according to claim 1 or 2, wherein a positioning portion for positioning the ink pouring portion of the ink container is provided on the edge of the opening. 7. The ink tank according to claim 1 or 2, wherein, the ink tank has a cap covering the edge of the opening and sealing the ink injection port, The edge of the opening is circular, and a tank-side threaded portion is provided on the outer peripheral surface of the edge of the opening, A cap-side threaded portion engaged with the can-side threaded portion is provided on an inner peripheral surface of the cap.