CN219486932U

CN219486932U - Ink box

Info

Publication number: CN219486932U
Application number: CN202320329594.5U
Authority: CN
Inventors: 邱涌群
Original assignee: Zhuhai Ninestar Management Co Ltd
Current assignee: Zhuhai Ninestar Management Co Ltd
Priority date: 2022-09-29
Filing date: 2023-02-24
Publication date: 2023-08-08
Anticipated expiration: 2033-02-24
Also published as: CN219486933U; CN219338991U

Abstract

The present application relates to an ink cartridge for supplying ink to a printing apparatus, the ink cartridge comprising: the ink box comprises a box body, a face cover and an ink bag, wherein the box body is provided with a mounting cavity, the face cover is arranged on the box body to seal the mounting cavity, the face cover is provided with an air guide hole, the ink bag is arranged in the mounting cavity, and the ink bag is provided with an ink outlet; the ink bag is internally provided with a deformation piece, a gas control cavity is arranged between the deformation piece and the surface cover, the gas control cavity is communicated with the gas guide hole, and the deformation piece can elastically deform under the action of gas pressure; the side of the deformation piece far away from the face cover is provided with an ink cavity for containing ink, an elastic piece is arranged in the ink cavity, and the elastic piece is positioned between the deformation piece and the ink outlet. The elastic piece can limit the movement range of the deformation piece, so that when the ink volume in the ink cavity is small, the deformation piece is prevented from being clung to the ink outlet, the ink outlet is affected, and the residual ink in the ink cavity is small when the ink box cannot supply ink. Meanwhile, the volume of the air control cavity of the brand-new ink box is smaller, and the volume of the ink cavity is relatively larger, so that the ink box can store more ink.

Description

Ink box

Technical Field

The application relates to the technical field of printing devices, in particular to an ink box.

Background

The existing printer is mainly an ink-jet printer, an ink box is arranged in the printer, ink is contained in the ink box, and the printer can jet the ink onto paper to form characters or patterns to be printed. Often be provided with the sponge in the ink horn, the sponge can absorb ink, makes the ink horn be difficult for leaking ink, but the sponge also can make the ink quantity that the ink horn can hold reduce and the ink box can not supply the ink when remaining more.

Disclosure of Invention

The application provides an ink box, this ink box has solved the ink box and has held the problem that the ink yield is little and the residual ink yield is big when abandonment.

An ink cartridge provided in an embodiment of the present application is configured to supply ink to a printing apparatus, and includes:

the box body is provided with an installation cavity;

the surface cover is arranged on the box body so as to seal the mounting cavity, and an air guide hole is formed in the surface cover;

the ink bag is arranged in the mounting cavity and is provided with an ink outlet;

the ink bag is internally provided with a deformation piece, a gas control cavity is arranged between the deformation piece and the surface cover, the gas control cavity is communicated with the gas guide hole, and the deformation piece can elastically deform under the action of gas pressure; the deformation piece is far away from one side of the face cover is provided with an ink cavity for containing ink, an elastic piece is arranged in the ink cavity, and the elastic piece is located between the deformation piece and the ink outlet.

In one possible design, the bottom wall of the ink bag opposite to the deformation member is provided with a protruding portion, the ink outlet is arranged on the protruding portion, and one end of the elastic member is sleeved on the outer side of the protruding portion.

In one possible design, the box body further has a filter cavity, and an ink supply needle is disposed on one side of the filter cavity near the installation cavity, and the ink supply needle is inserted into the ink outlet to communicate the ink cavity with the filter cavity.

In one possible design, the ink cartridge further comprises an elastically deformable sealing member, the sealing member is provided with a gap, and when the ink supply needle is not inserted into the ink outlet, the gap is blocked under the action of the elastic force of the sealing member so as to close the ink outlet;

the ink supply needle can be inserted into the ink outlet through a gap of the sealing piece so as to communicate the ink cavity and the filter cavity.

In one possible design, the box body is provided with a filter cavity, the filter cavity is positioned below the mounting cavity, and a first gasket is arranged at one end of the filter cavity, which is close to the mounting cavity;

the one end that the ink outlet kept away from the ink cavity is provided with the second gasket, the second gasket can with first gasket butt.

In one possible design, the ink outlet is provided with a first sponge, one end of the filter cavity, which is close to the ink outlet, is provided with a second sponge, the first sponge can be abutted with the second sponge, and the density of the second sponge is greater than that of the first sponge.

In one possible design, the first gasket and the second gasket have a sealant therebetween.

In one possible design, the side wall of the ink outlet extends into the filter chamber and abuts the side wall of the filter chamber.

In one possible design, the ink cartridge further comprises a fixing device, the fixing device comprises a first connecting portion arranged on the ink bag and a second connecting portion arranged on the box body, and the first connecting portion and the second connecting portion can be matched to realize detachable connection of the ink bag and the box body.

In one possible design, the ink bag is provided with a first magnet, the box is provided with a second magnet, the first magnet and the second magnet can attract each other, the first magnet is the first connecting portion, and the second magnet is the second connecting portion.

In one possible design, the ink bag is provided with a buckle, the box body is provided with a mounting hole, the buckle can be in clamping connection with the mounting hole, the buckle is the first connecting part, and the mounting hole is the second connecting part.

In the application, the air control cavity is communicated with the outside through the air guide hole, so that the air pressure in the air control cavity can be kept consistent with the outside atmospheric pressure. The ink in the ink cavity can flow out through the ink outlet, the air pressure in the ink cavity is reduced along with the consumption of the ink in the ink cavity, and the deformation piece is elastically deformed in order to keep the same pressure at two sides of the deformation piece, namely the deformation piece is elastically deformed under the action of the air pressure, so that the ink can smoothly flow out of the ink cavity. The elastic piece is positioned between the deformation piece and the ink outlet, and moves towards the direction close to the ink outlet when the deformation piece deforms to compress the elastic piece, so that the elastic piece can limit the movement range of the deformation piece, and the deformation piece is prevented from being clung to the ink outlet when the ink quantity in the ink cavity is small, the ink outlet is influenced, and therefore, the residual ink in the ink cavity is less when the ink box cannot supply ink. Meanwhile, the volume of the air control cavity of the brand-new ink box is smaller, and the volume of the ink cavity is relatively larger, so that the ink box can store more ink.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

FIG. 1 is a schematic view of an ink cartridge according to an embodiment of the present disclosure;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a cross-sectional view of the ink bag portion of FIG. 2;

FIG. 4 is a schematic view of the structure of the case in FIG. 1;

FIG. 5 is a schematic view of the deforming member of FIG. 3;

FIG. 6 is an exploded view of the ink cartridge of FIG. 1 in one embodiment;

FIG. 7 is a schematic view of the structure of the case in FIG. 6;

FIG. 8 is a schematic view of the ink bag of FIG. 6;

FIG. 9 is a cross-sectional view of the ink cartridge of FIG. 1 in one embodiment;

FIG. 10 is an exploded view of the ink cartridge of FIG. 9;

FIG. 11 is a schematic view of the structure of the case in FIG. 10;

FIG. 12 is a schematic view of the ink bag of FIG. 9;

FIG. 13 is a schematic view of an ink cartridge according to an embodiment of the present disclosure;

fig. 14 is a schematic view of a face cover in one embodiment.

Reference numerals:

1-a box body;

11-a mounting cavity;

12-a filter chamber;

13-an ink supply needle;

14-a first gasket;

15-a second sponge;

16-a filter screen;

17-a second magnet;

18-mounting holes;

2-face cover;

21-air vent;

22-an air guide groove;

23-ink injection holes;

24-a hand-held part;

3-ink sacs;

31-an ink outlet;

32-deforming member;

33-an elastic member;

34-a seal;

35-a first sponge;

36-a second gasket;

37-a first magnet;

38-a buckle;

4-protecting cover;

5-an aqueous medium;

6-chip.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Detailed Description

For a better understanding of the technical solutions of the present application, embodiments of the present application are described in detail below with reference to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, of the embodiments of the present application. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.

The present application provides an ink cartridge for supplying ink to a printing device. As shown in fig. 1 to 3, the ink cartridge includes: the ink bag comprises a box body 1, a face cover 2 and an ink bag 3, wherein the box body 1 is provided with a mounting cavity 11, the face cover 2 is arranged on the box body 1 to seal the mounting cavity 11, an air guide hole 21 is formed in the face cover 2, the ink bag 3 is arranged in the mounting cavity 11, and the ink bag 3 is provided with an ink outlet 31. The ink bag 3 is internally provided with a deformation piece 32, a gas control cavity is arranged between the deformation piece 32 and the face cover 2 and is communicated with the gas guide hole 21, and the deformation piece 32 can elastically deform under the action of gas pressure; the deformation member 32 has an ink chamber on a side away from the face cover 2 for accommodating ink, an elastic member 33 is provided in the ink chamber, and the elastic member 33 is located between the deformation member 32 and the ink outlet 31.

In the present embodiment, as shown in fig. 1 to 3, the air control chamber communicates with the outside through the air vent 21, so that the air pressure in the air control chamber can be kept equal to the outside atmospheric pressure. The ink in the ink cavity can flow out through the ink outlet 31, and the air pressure in the ink cavity is reduced along with the consumption of the ink in the ink cavity, so that the deformation piece 32 is elastically deformed in order to keep the same pressure on two sides of the deformation piece 32, namely the deformation piece 32 is elastically deformed under the action of the air pressure, and the ink can smoothly flow out of the ink cavity. The elastic member 33 is located between the deformation member 32 and the ink outlet 31, and when the deformation member 32 deforms, the deformation member moves in a direction close to the ink outlet 31, so that the elastic member 33 can limit the movement range of the deformation member 32, and when the ink volume in the ink cavity is small, the deformation member 32 is prevented from tightly clinging to the ink outlet 31, and the ink outlet is affected, so that less ink remains in the ink cavity when the ink cartridge cannot supply ink. Meanwhile, the volume of the air control cavity of the brand-new ink box is smaller, and the volume of the ink cavity is relatively larger, so that the ink box can store more ink.

In addition, the deformation member 32 separates the air vent 21 and the ink chamber, and can effectively prevent ink leakage of the ink cartridge at the air vent 21. As shown in fig. 1, to protect the cartridge body 1, the ink cartridge is further provided with a shield 4.

Specifically, as shown in fig. 3, the bottom wall of the ink bag 3 opposite to the deforming member 32 is provided with a protruding portion, the ink outlet 31 is provided in the protruding portion, and one end of the elastic member 33 is sleeved outside the protruding portion.

In the present embodiment, as shown in fig. 3, a through hole is provided on the protruding portion, and the through hole may serve as the ink outlet 31. The elastic piece 33 is fixed on the protruding part, so that the elastic piece 33 can be prevented from moving randomly along with the shaking of the ink box in the ink cavity, and the use of the ink box is affected, and therefore, the reliability of the ink box can be improved by sleeving one end of the elastic piece 33 on the outer side of the protruding part. The elastic member may be a spring or the like.

In a specific embodiment, as shown in fig. 2 and 4, the box 1 further has a filter cavity 12, and an ink supply needle 13 is disposed on one side of the filter cavity 12 near the mounting cavity 11, and the ink supply needle 13 is inserted into the ink outlet 31 to communicate the ink cavity with the filter cavity 12.

In the present embodiment, as shown in fig. 2 and 4, when the ink supply needle 13 is inserted into the ink outlet 31, ink in the ink chamber can flow into the filter chamber 12 through the ink supply needle 13. The cartridge 1 is provided with a nozzle at a side of the filter chamber 12 away from the mounting chamber 11, and ink flowing into the filter chamber 12 can flow out through the nozzle, thereby supplying ink to the printing apparatus.

Specifically, the ink supply needle 13 may be attached to the cartridge 1 by bonding or the like so as to be fixed above the filter chamber 12. An ink outlet 31 is provided in the ink bag 3 for extending into the bottom wall of the mounting chamber 11 so that the ink chamber and the filter chamber 12 can communicate through the ink supply needle 13.

Further, as shown in fig. 3, the ink cartridge further includes a seal member 34 capable of elastic deformation, the seal member 34 has a slit, and when the ink supply needle 13 is not inserted into the ink outlet 31, the slit is blocked to close the ink outlet 31 under the elastic force of the seal member 34, and the ink supply needle 13 can be inserted into the ink outlet 31 through the slit of the seal member 34 to communicate the ink chamber with the filter chamber 12.

In the present embodiment, as shown in fig. 3, when the ink bag 3 is mounted to the mounting chamber 11, the seal 34 is located between the ink supply needle 13 and the ink outlet 31, so that the ink cartridge is effectively prevented from leaking at the ink outlet 31. The seal 34 may be a self-sealing member that seals the ink outlet 31 when the ink supply needle 13 is not inserted into the ink outlet 31, preventing ink leakage when the ink bag 3 is not mounted in the mounting chamber 11. In particular, the seal 34 is made of an elastic material and is therefore elastically deformable.

As shown in fig. 5, the deforming member 32 has a substantially box-like structure, and the deforming member 32 may be made of a plastic material capable of being elastically deformed. The deforming member 32 may also be attached to the ink bag 3 by bonding or welding or the like. When the face cover 2 is connected with the box body 1, the face cover 2 is abutted against the ink bag 3, so that the ink bag 3 is sealed or sealed. The connection mode of the surface cover 2 and the box body 1 can be gluing or clamping.

In a specific embodiment, as shown in fig. 6 to 8, the box 1 has a filter cavity 12, the filter cavity 12 is located below the mounting cavity 11, a first gasket 14 is disposed at one end of the filter cavity 12 near the mounting cavity 11, a second gasket 36 is disposed at one end of the ink outlet 31 far from the ink cavity, and the second gasket 36 can be abutted against the first gasket 14.

In the present embodiment, as shown in fig. 6 to 8, when the ink bag 3 is attached to the attachment chamber 11, the ink outlet 31 corresponds to the position of the filter chamber 12, that is, ink flowing out from the ink outlet 31 can flow into the filter chamber 12. The filter cavity 12 is further provided with a filter screen 16, the filter screen 16 can be fixed on the first gasket 14, the first gasket 14 is abutted with the second gasket 36, and the filter screen 16 can be prevented from being deformed due to the contact between the second gasket 36 and the filter screen 16.

Specifically, as shown in fig. 7, the first gasket 14 may be adhered to the case 1 by an adhesive, so that the first gasket 14 is disposed at an end of the filter chamber 12 near the mounting chamber 11. The first gasket 14 has a generally square configuration, and openings are provided corresponding to the locations of the filter cavities 12, and the filter screen 16 may be welded to the first gasket 14 at the locations of the openings. As shown in fig. 8, the second spacer 36 is also generally square in structure, and is provided with an opening corresponding to the position of the ink outlet 31. When the ink bag 3 is mounted in the mounting chamber 11, the first gasket 14 and the second gasket 36 are abutted, and the opening on the first gasket 14 corresponds to the opening on the second gasket 36, so that the ink flowing out from the ink outlet 31 can smoothly flow into the filter chamber 12. At the same time, the abutting first gasket 14 and second gasket 36 also prevent leakage of ink from the ink outlet 31 into the filter chamber 12.

When the cover 2 is connected to the case 1, the cover 2 abuts against the ink bag 3, thereby pressing the ink bag 3, and abutting the first gasket 14 and the second gasket 36 is achieved.

As shown in fig. 6, the ink cartridge further includes a chip 6, and the chip 6 can be used to record information such as the ink volume and the number of uses of the ink cartridge, and the chip 6 is provided on the cartridge body 1 and can be electrically connected to the printing device when the ink cartridge is loaded into the printing device, and transmit the information of the ink cartridge to the printing device.

In the first embodiment, as shown in fig. 8, the ink outlet 31 is provided with a first sponge 35, one end of the filter chamber 12 near the ink outlet 31 is provided with a second sponge 15, the first sponge 35 can be abutted with the second sponge 15, and the density of the second sponge 15 is greater than that of the first sponge 35.

In this embodiment, the ink in the ink chamber flows through first sponge 35 and second sponge 15 in proper order and gets into filter chamber 12, and on the one hand first sponge 35 and second sponge 15 can adsorb the ink, prevent ink horn hourglass ink when not needing to print, on the other hand first sponge 35 and second sponge 15 can filter the ink, improves the ink quality. The density of the second sponge 15 being greater than the density of the first sponge 35 prevents the first sponge 35 from crushing the second sponge 15.

In one particular embodiment, a sealant is provided between the first gasket 14 and the second gasket 36.

In the present embodiment, the first gasket 14 and the second gasket 36 may be bonded by sealant, so that the sealing property between the ink outlet 31 and the filter chamber 12 is better, and ink leakage is less likely to occur.

In one embodiment, the side wall of the ink outlet 31 extends into the filter chamber 12 and abuts the side wall of the filter chamber 12.

In this embodiment, the opening at the upper end of the filter cavity 12 is slightly larger than the ink outlet 31, so that the side wall of the ink outlet 31 can extend into the filter cavity 12 and abut against the side wall of the filter cavity 12, thereby further preventing ink from leaking during the process of flowing from the ink outlet 31 into the filter cavity 12.

Specifically, when the second gasket 36 is disposed at the ink outlet 31, both the second gasket 36 and the side wall of the ink outlet 31 may extend into the filter cavity 12, and the second gasket 36 may abut against the side wall of the filter cavity 12.

In some embodiments, three ink chambers are provided within the ink bag 3 to accommodate different colors of ink. In order to realize the ink supply of the ink bag 3 to the printing device, the bottoms of the three ink cavities are provided with ink outlets 31, one end, far away from the ink cavities, of each ink outlet 31 is provided with a second gasket 36, the box body 1 is provided with three filter cavities 12 corresponding to the three ink outlets 31, one end, close to the ink outlets 31, of each filter cavity 12 is provided with a first gasket 14 and a filter screen 16, and one end, far away from the ink outlets 31, is provided with a spray head. When the ink bag 3 is installed in the installation cavity 11, the three ink outlets 31 on the ink bag 3 respectively correspond to the three filter cavities 12 on the box body 1, so that the inks with different colors in the ink cavities can respectively flow into the different filter cavities 12, and then the ink is supplied to the printing device through the spray head. Each first gasket 14 can abut the second gasket 36 to prevent the screen 16 from deforming and affecting print quality. In addition, a water absorbing medium 5 may be provided in the ink bag 3.

In a specific embodiment, the ink cartridge further comprises a fixing device, the fixing device comprises a first connecting portion arranged on the ink bag 3 and a second connecting portion arranged on the cartridge body 1, and the first connecting portion and the second connecting portion can be matched to realize detachable connection of the ink bag 3 and the cartridge body 1.

In the present embodiment, the detachable connection of the ink bag 3 and the cartridge body 1 can replace only the ink bag 3 when the ink in the ink bag 3 is exhausted, without replacing the whole ink cartridge, thereby reducing the cost required for printing and being environment-friendly.

In a specific embodiment, as shown in fig. 9 to 12, the ink bag 3 is provided with a first magnet 37, the cartridge 1 is provided with a second magnet 17, the first magnet 37 and the second magnet 17 can attract each other, the first magnet 37 is a first connection portion, and the second magnet 17 is a second connection portion.

In the present embodiment, as shown in fig. 11, the second magnet 17 is provided on the bottom wall of the mounting chamber 11, and as shown in fig. 12, the first magnet 37 is provided on the bottom of the ink bag 3, and when the ink bag 3 is mounted in the mounting chamber 11, the first magnet 37 and the second magnet 17 can be corresponded and attracted to each other to fix the ink bag 3 to the cartridge 1, thereby realizing the detachable connection of the ink bag 3 and the cartridge 1. Meanwhile, the magnet adsorption mode has the advantages of simple structure and convenience in processing.

In particular, the first magnet 37 may be welded or glued to the bottom of the ink bag 3 and the second magnet 17 may be welded or glued to the bottom wall of the mounting chamber 11.

In a specific embodiment, as shown in fig. 13, the ink bag 3 is provided with a buckle 38, the box 1 is provided with a mounting hole 18, the buckle 38 can be clamped with the mounting hole 18, the buckle 38 is a first connection part, and the mounting hole 18 is a second connection part.

In the present embodiment, as shown in fig. 13, the ink bag 3 is provided with the snap hooks 38 on the opposite side walls, and the snap hooks 38 have a plate-like structure having elasticity. The mounting holes 18 are formed in the box body 1 corresponding to the buckles 38, when the ink bags 3 are installed in the mounting cavity 11, the buckles 38 can be clamped with the mounting holes 18, the box body 1 around the mounting holes 18 limits the movement of the buckles 38 to the ink bags 3, the buckles 38 are tightly pressed on the box body 1, and the ink bags 3 and the box body 1 are fixed.

Furthermore, the ink bag 3 is provided with grooves on both sides for receiving the snap hooks 38. When the ink bag 3 needs to be taken out of the mounting cavity 11, the buckle 38 is pressed, the buckle 38 is received in the groove, and the contact buckle 38 is in clamping connection with the mounting hole 18, so that the ink bag 3 can be taken out.

As shown in fig. 14, the cover 2 may be provided with an ink filling hole 23 and an air guide groove 22 communicating with the air guide hole 21, and ink may be filled into the ink bag 3 through the ink filling hole 23, and air entering the ink bag 3 along with ink during ink filling may be discharged through the air guide hole 21 and the air guide groove 22. Specifically, the ink filling hole 23 and the air vent 21 are through holes in the face cover 2, and a sealing film (not shown in the figure) is arranged on the face cover 2, the sealing film seals the air vent 21 and part of the air vent 22, one end of the air vent 22 is communicated with the air vent 21, and one end of the air vent 22, which is not communicated with the air vent 21, is not sealed by the sealing film, so that external air can flow into the ink bag 3 through the air vent 22 and the air vent 21 in sequence. The air guide groove 22 has no multi-section zigzag groove-shaped structure, and the zigzag air guide groove 22 can prevent foreign matters such as external dust from entering the ink bag 3 through the air guide holes 21 to pollute the ink and stabilize the air inlet of the ink bag 3.

As shown in fig. 14, the cover 2 is further provided with a holding portion 24, and the holding portion 24 is a protruding structure on both sides of the cover 2. When the ink bag 3 is connected with the face cover 2, a user can lift the face cover 2 through the hand-held part 24, the ink bag 3 is taken out of the mounting cavity 11, and the hand-held part 24 can be convenient for the user to operate.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An ink cartridge for supplying ink to a printing device, the ink cartridge comprising:

the box body (1), the box body (1) has an installation cavity (11);

the surface cover (2) is arranged on the box body (1) so as to seal the mounting cavity (11), and the surface cover (2) is provided with an air guide hole (21);

the ink bag (3), the ink bag (3) is arranged in the mounting cavity (11), and the ink bag (3) is provided with an ink outlet (31);

the ink bag (3) is internally provided with a deformation piece (32), a gas control cavity is arranged between the deformation piece (32) and the face cover (2), the gas control cavity is communicated with the gas guide hole (21), and the deformation piece (32) can elastically deform under the action of gas pressure; the deformation piece (32) is far away from one side of the face cover (2) and is provided with an ink cavity for containing ink, an elastic piece (33) is arranged in the ink cavity, and the elastic piece (33) is arranged on the ink outlet (31).

2. The ink cartridge according to claim 1, wherein a bottom wall of the ink bag (3) opposite to the deformation member (32) is provided with a projection, the ink outlet (31) is provided in the projection, and one end of the elastic member (33) is sleeved outside the projection.

3. The ink cartridge according to claim 1, wherein the cartridge body (1) further has a filter chamber (12), an ink supply needle (13) is provided on a side of the filter chamber (12) close to the installation chamber (11), and the ink supply needle (13) is inserted into the ink outlet (31) to communicate the ink chamber with the filter chamber (12).

4. -the cartridge according to claim 3, characterized in that it further comprises an elastically deformable sealing member (34), said sealing member (34) having a slit, said slit being blocked by the elastic force of said sealing member (34) when said ink supply needle (13) is not inserted into said ink outlet (31) so as to close said ink outlet (31);

the ink supply needle (13) can be inserted into the ink outlet (31) through a gap of the sealing member (34) so as to communicate the ink chamber and the filter chamber (12).

5. The ink cartridge according to claim 1, wherein the cartridge body (1) has a filter chamber (12), the filter chamber (12) is located below the installation chamber (11), and a first gasket (14) is disposed at an end of the filter chamber (12) close to the installation chamber (11);

the ink outlet (31) is provided with a second gasket (36) at one end far away from the ink cavity, and the second gasket (36) can be abutted with the first gasket (14).

6. The ink cartridge according to claim 5, wherein the ink outlet (31) is provided with a first sponge (35), one end of the filter chamber (12) near the ink outlet (31) is provided with a second sponge (15), the first sponge (35) can be abutted with the second sponge (15), and the density of the second sponge (15) is greater than that of the first sponge (35).

7. The ink cartridge of claim 5, wherein a sealant is provided between the first gasket (14) and the second gasket (36).

8. The ink cartridge according to claim 5, wherein a side wall of the ink outlet (31) extends into the filter chamber (12) and abuts against a side wall of the filter chamber (12).

9. The cartridge according to any one of claims 1 to 8, further comprising a fixing device comprising a first connection portion provided on the ink bag (3) and a second connection portion provided on the cartridge body (1), the first and second connection portions being capable of cooperating to achieve a detachable connection of the ink bag (3) and the cartridge body (1).

10. The ink cartridge according to claim 9, wherein the ink bag (3) is provided with a first magnet (37), the cartridge body (1) is provided with a second magnet (17), the first magnet (37) and the second magnet (17) are capable of attracting each other, the first magnet (37) is the first connection portion, and the second magnet (17) is the second connection portion.

11. The ink cartridge according to claim 9, wherein the ink bag (3) is provided with a buckle (38), the cartridge body (1) is provided with a mounting hole (18), the buckle (38) can be clamped with the mounting hole (18), the buckle (38) is the first connection portion, and the mounting hole (18) is the second connection portion.