Ink cartridge and ink ejection apparatus

Abstract

The utility model relates to printing equipment technical field provides an ink box and ink spouts equipment, wherein the ink box includes: box body, the inside of box body is provided with the liquid cavity for storing liquid, and the outside of box body is provided with the liquid communication hole and gas communication hole with liquid cavity intercommunication, first valve, in the flow path of gas communication hole and liquid cavity, first valve allows gas to pass in the flow path in the first state, closes the flow path in the second state, second valve, along the direction of gas communication hole from liquid cavity on the flow path, second valve is located in the downstream position of first valve in the flow path, second valve allows gas to pass in the flow path in the third state, second valve closes the flow path in the fourth state. The utility model can effectively seal the ink in the ink box while guaranteeing the gas-liquid exchange in the ink chamber, prevent the occurrence of ink leakage phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, and in particular to an ink cartridge and an ink ejection device. Background Technology

[0002] Ink cartridges are a common liquid consumable in inkjet printers, used to supply ink to the print head to form images on the printing medium. Some ink cartridges on the market have an air inlet. During use, as the ink inside decreases, external gas is gradually added to maintain pressure balance. However, because the air inlet is open, internal gas can enter the cartridge through it or escape into the external environment. This can cause ink to be drawn back into the cartridge after ink delivery, leading to ink supply difficulties.

[0003] To address the aforementioned issues, existing technologies incorporate a one-way valve at the air inlet to prevent ink from flowing backwards within the ink cartridge. This means that air enters through the air inlet during ink extraction, and closes after extraction to prevent air from escaping. However, this design suffers from ink leakage. During air intake, the one-way valve is briefly open; if the printer shakes or prints during this time, ink may splash into the air inlet and leak out, potentially clogging it or even contaminating the printer's interior. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide an ink cartridge and an ink ejection device that can prevent ink splashing and leakage while ensuring unidirectional air intake.

[0005] This utility model provides an ink cartridge in a first aspect, comprising: a cartridge body, wherein the interior of the cartridge body is provided with a liquid cavity for storing liquid, and the exterior of the cartridge body is provided with a liquid communication hole and a gas communication hole communicating with the liquid cavity; a first valve, located in the flow path between the gas communication hole and the liquid cavity, and capable of switching between a first state and a second state, wherein the first valve allows gas to pass through the flow path in the first state and closes the flow path in the second state; a second valve, located downstream of the first valve along the flow path from the gas communication hole toward the liquid cavity, and having a third state and a fourth state, wherein the second valve allows gas to pass through the flow path in the third state and closes the flow path in the fourth state; wherein, when gas flows from the gas communication hole to the liquid cavity in the flow path, the first valve is in the first state and the second valve is in the third state; when gas flows from the liquid cavity to the gas communication hole in the flow path, the first valve is in the second state and the second valve is in the fourth state.

[0006] According to the ink cartridge provided in this embodiment of the present invention, two valve structures are provided on the air intake flow path, and the two valves have two states in the path. When the gas flows from the gas communication hole to the liquid chamber, the first valve in the first state and the second valve in the third state are both in the open state. During the air intake process, after the gas enters the flow path, it will first pass through the first valve and then through the second valve. If the ink overflows in the reverse direction and needs to pass through the flow path, it will first block the second valve and make the second valve in the closed state. At this time, since the second valve is closed, there is no longer a negative pressure to prevent air intake. At this time, the ink is blocked at the second valve because it cannot achieve gas-liquid exchange. Thus, the ink can no longer enter the first valve and overflows from the flow path to the gas communication hole, which can effectively seal the ink in the ink cartridge and prevent ink leakage.

[0007] In a preferred embodiment of this utility model, the box body is provided with a continuous first channel and a second channel for forming the flow path, the first valve is disposed on the first channel, and the second valve is disposed on the second channel.

[0008] In a preferred embodiment of this utility model, the first channel includes an air inlet section, an intermediate section, and a connecting section. The air inlet section communicates with the gas communication hole and extends along a first direction. The intermediate section extends along a second direction different from the first direction and has a first air hole communicating with the connecting section. The connecting section communicates with the second channel. The first valve includes a first valve core disposed within the connecting section and movable within the connecting section. When the first valve core moves to a first position, the first valve is in a first state and the first valve core leaves the first air hole. When the first valve core moves to a second position, the first valve is in a second state and the first valve core blocks the first air hole.

[0009] In a preferred embodiment of this utility model, a guide portion is provided in the connecting section, and the first valve core is guided by the guide portion to move along the second direction.

[0010] In a preferred embodiment of this utility model, the box body includes a first sealing film and a second sealing film. The first sealing film is disposed at the end of the middle section away from the first vent to block the opening between the middle section and the liquid chamber. The second sealing film is disposed on the side of the connecting section away from the first vent to block the opening between the box body and the outside.

[0011] In a preferred embodiment of the present invention, the box body further includes a second air hole connecting the second channel and the connecting segment. The connecting segment includes a large head located in a second direction of the first air hole and a small head covering the second air hole. The first valve core is located inside the large head and its width is greater than that of the small head.

[0012] In a preferred embodiment of this utility model, the second channel has a vent communicating with the liquid chamber and a second vent communicating with the first channel. The second valve includes an elastic component and a second valve core that can move in the second channel. When the second valve core is in the third position, the second valve body is in the third state and the second valve core is away from the vent. When the second valve core is in the fourth position, the second valve body is in the fourth state and the second valve core blocks the vent. The elastic component provides elastic force to block the second valve core at the vent.

[0013] In a preferred embodiment of this utility model, a deformable gas storage bag is also included. The box body is provided with a gas exchange port that communicates with the gas storage bag, and the gas storage bag is located in the liquid cavity.

[0014] In a preferred embodiment of this invention, when the box body is in use, the gas communication hole is located above the highest liquid level in the liquid cavity.

[0015] In a second aspect, the present invention also provides an ink ejection device, including a device body and an ink cartridge as described in the first aspect embodiment disposed within the device body.

[0016] Other features and advantages of the present invention will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the technical solution of the present invention. The objects and other advantages of the present invention may be realized and obtained by means of the structures and / or processes particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the ink ejection device provided in an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the structure of the ink cartridge provided in an embodiment of this utility model;

[0019] Figure 3 An exploded view of the ink cartridge provided in an embodiment of this utility model;

[0020] Figure 4 This is a partially exploded structural diagram of the ink cartridge provided in an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the internal structure of the ink cartridge provided in an embodiment of the present utility model;

[0022] Figure 6 A cross-sectional view of the ink cartridge in the air intake state provided in an embodiment of this utility model;

[0023] Figure 7 A cross-sectional view of the ink cartridge provided in the embodiment of this utility model in a non-air-inlet state.

[0024] Explanation of icon numbers:

[0025] 1 Equipment body, 11 Media tray, 12 Conveying assembly, 13 Paper tray, 21 Feeding roller, 22 Conveying roller, 23 Support frame, 24 Carriage, 25 Ink cartridge;

[0026] 100 Box body, 110 Liquid chamber, 120 Liquid connecting hole, 130 Gas connecting hole, 140 First channel, 141 Air inlet section, 142 Intermediate section, 142a First vent, 143 Connecting section, 143a Guide section, 143b Large head, 143c Small head, 150 Second channel, 151 Second vent, 152 Vent, 160 Gas exchange port;

[0027] 200 First valve, 210 First valve core;

[0028] 300 Second valve, 310 Elastic component, 320 Second valve core;

[0029] 400 First sealing membrane;

[0030] 500 Second sealing membrane;

[0031] 600 gas storage bag, 610 bag opening. Detailed Implementation

[0032] The following detailed description of the embodiments of this utility model, in conjunction with the accompanying drawings, will provide a thorough understanding of how this utility model uses technical means to solve technical problems and achieve technical effects, enabling its implementation. It should be noted that these specific descriptions are merely intended to facilitate a clearer understanding of this utility model by those skilled in the art, and are not intended to limit its scope. For example, the use of "first" and "second" in the embodiments of this utility model is not intended to limit its application, but merely to indicate the serial numbers of multiple identical or similar devices or mechanisms. Those skilled in the art can readjust these serial numbers for ease of description or during the organization of technical solutions. Furthermore, alternative solutions are described for some mechanisms in different embodiments, and these alternatives can be applied to other identical or similar devices or mechanisms. As long as there is no conflict, the various embodiments and features in each embodiment of this utility model can be combined with each other, and the resulting technical solutions are all within the protection scope of this utility model.

[0033] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] First, this utility model provides an ink ejection device, see reference. Figure 1The ink ejection device includes a device body 1 and a media tray 11, a conveying assembly 12, a liquid ejection assembly, a liquid storage assembly, and a paper discharge tray 13 disposed within the device body 1. The media tray 11 is used to hold printing media such as paper, and in this embodiment, it is disposed on the back side of the device body 1. The paper discharge tray 13 is used to place the printed paper and is located on the front side of the device body 1. The conveying assembly 12 is located between the media tray 11 and the paper discharge tray 13, and includes a media transmission path disposed inside the device body 1 and a conveyor roller assembly on the media transmission path. The conveyor roller assembly consists of at least a paper feed roller 21 and a conveying roller 22. The paper feed roller 21 is used to feed the printing media in the media tray 11 into the media transmission path, and the conveying roller 22 continues to convey the media in the media transmission path forward until it is conveyed onto the paper discharge tray 13. The liquid jetting assembly includes a liquid jetting head, a support frame 23, and a slide 24 slidably mounted on the support frame 23. The liquid jetting head is mounted on the slide 24. When the slide 24 slides on the support frame 23, it moves along a transmission direction perpendicular to the media transmission path. During the movement of the slide 24, the liquid jetting head jets liquid onto the printing media on the media transmission path, thereby achieving imaging of the printing media.

[0035] The liquid storage assembly includes an ink cartridge 25, which in this embodiment is mounted on a carriage 24. The carriage 24 has an assembly cavity for mounting the ink cartridge 25. The ink cartridge 25 stores printing liquid (usually ink) and supplies the liquid to the liquid ejector head. Alternatively, it can be located on the device body 1 at other positions with assembly cavities besides the carriage 24, and supplied to the liquid ejector head via a supply line; no further limitations are made here. The ink cartridge 25 may be configured with only black ink, or it may include ink cartridges for at least three other colors such as magenta, yellow, and cyan to meet color printing requirements.

[0036] like Figures 2 to 7 As shown, the ink cartridge includes a cartridge body 100, a first valve 200, and a second valve 300. The cartridge body 100 has a liquid chamber 110 for storing liquid inside, and a liquid communication hole 120 and a gas communication hole 130 connected to the liquid chamber 110 on the outside of the cartridge body 100. The liquid communication hole 120 allows ink in the liquid chamber 110 to flow out and be supplied to the liquid nozzle inside the device body. The slide 24 on which the ink cartridge is mounted is provided with a pipe connector that is inserted into the liquid communication hole 120. The pipe connector is connected to the liquid nozzle through an internal pipe on the slide. The gas communication hole 130 is used to connect the liquid chamber 110 to the outside atmosphere. When the liquid chamber 110 is in a negative pressure state due to the reduction of ink, gas is automatically filled to keep the pressure inside the liquid chamber 110 balanced with the outside atmosphere.

[0037] A flow path exists between the gas communication hole 130 and the liquid chamber 110, formed within the housing body 100. A first valve 200 is located within this flow path and has a first state and a second state. In the first state, the first valve 200 is open, allowing gas to pass through the flow path. In the second state, the first valve 200 is closed, preventing liquid or gas in the liquid chamber 110 from passing through the flow path. The first valve 200 can switch between the first and second states depending on the flow direction of the fluid in the flow path. Specifically, when the gas flows along the inlet direction (e.g., ...), the valve 200 switches between the first and second states. Figure 6 When the gas flows from the gas communication port 130 to the liquid chamber 110 in the direction P), the first valve 200 is in the first state to allow gas passage. When the liquid or gas in the liquid chamber 110 flows in the exhaust direction (e.g., ...), the first valve 200 is in the first state to allow gas passage. Figure 7 When the liquid flows from the liquid chamber 110 to the gas communication hole 130 in the direction K), the second valve 300 is in the second state and closes the flow path, thereby forming a form of controlling the one-way opening and closing of the gas.

[0038] Similarly, the second valve 300 is also located in the flow path between the gas communication hole 130 and the liquid chamber 110, and has a third state and a fourth state. In the third state, the second valve 300 is in the open state, and gas can pass through the flow path. In the fourth state, the second valve 300 is in the closed state, and the liquid or gas in the liquid chamber 110 is blocked by the second valve 300 and cannot pass through the flow path. The second valve 300 can switch between the third state and the fourth state according to the flow direction of the fluid in the flow path. Specifically, when the gas flows from the gas communication hole 130 to the liquid chamber 110 in the inlet direction, the first valve 200 is in the third state to allow the gas to pass through. When the gas in the liquid chamber flows from the liquid chamber 110 to the gas communication hole 130 in the fourth direction, the second valve 300 is in the fourth state to prevent the gas or liquid from passing through, thus forming a one-way opening and closing form for controlling the gas. In this embodiment, in the direction of air intake, i.e., the direction of gas flow from gas communication hole 130 towards liquid chamber 110 in the flow path, the second valve 300 is located downstream of the first valve 200 in the flow path, so that when the gas flows in this direction, it first passes through the first valve 200 and then through the second valve 300. When the liquid or gas in the liquid chamber 110 flows in the direction of exhaust opposite to the direction of air intake, the liquid or gas will first reach the second valve 300 and be blocked by the second valve 300.

[0039] In conjunction with the above embodiments, in specific implementation of this utility model, if gas flows from the gas communication hole 130 to the liquid chamber 110, the first valve 200 and the second valve 300 will open sequentially to allow gas to enter the liquid chamber 110 from outside the ink cartridge. If liquid or gas attempts to flow from the liquid chamber 110 to the gas communication hole 130, it will be blocked by the second valve 300, which arrives first. Under this structure, if ink flows backward from the liquid chamber 110, it will first reach the second valve 300 along the flow path in the exhaust direction and block the communication port of the second valve 300 to prevent gas flow. At this time, gas and liquid no longer flow in the flow path. Since gas cannot be supplied to the liquid chamber 110, ink cannot further overflow from the flow path and therefore cannot reach the first valve 200 to leak into the gas communication hole 130, ensuring the airtightness of the ink in the ink cartridge. When the ink supply requires gas balance in this state, the negative pressure generated in the liquid chamber 110 will first push the ink from the second valve 300 back into the liquid chamber 110, thus continuing the ink supply process.

[0040] In one embodiment, see [reference] Figures 5 to 7 The box body 100 is provided with a continuous first channel 140 and a second channel 150 for forming a flow path. A first valve 200 is provided on the first channel 140 and a second valve 300 is provided on the second channel 150. Both channels are formed on the box body 100. The first valve 200 controls the flow of gas in the first channel 140 and the second valve 300 controls the flow of gas in the second channel 150.

[0041] The first channel 140 includes an air inlet section 141, an intermediate section 142, and a connecting section 143. The air inlet section 141 connects to the gas communication hole 130 and extends along a first direction, which is the same as the direction of gas intake in the gas communication hole 130. The intermediate section 142 extends along a second direction different from the first direction and has a first air hole 142a that connects to the connecting section 143. The connecting section 143 is connected to the second channel 150. Thus, the air inlet section 141, the intermediate section 142, and the connecting section 143 are arranged sequentially along the flow path. When gas enters the air inlet section 141 from the gas communication hole 130 and reaches the intermediate section 142, the gas will make a bend after entering the intermediate section 142 because the extension direction of the air inlet section 141 is different from the extension direction of the intermediate section 142. This can slow down the air intake speed and achieve the effect of controlling the continuous and stable ink supply during the ink supply process, avoiding the problem of uneven air intake caused by negative pressure.

[0042] See Figure 6 and Figure 7The first valve 200 includes a first valve core 210 disposed within the connecting section 143 and movable within the connecting section 143. The first valve 200 has a first position and a second position when moving within the connecting section 143. When the first valve core 210 moves to the first position, it moves away from the first vent 142a, placing the first valve 200 in a first state. When the first valve core 210 moves to the second position, it blocks the first vent 142a, placing the first valve 200 in a second state. In this structure, when unidirectional air intake is achieved, if gas passes through the first vent 142a in the intake direction, the gas will push open the first valve 200, allowing the first vent 142a to connect to the connecting section 143, since the first valve 200 is located outside the first vent 142a. If the gas flows in the exhaust direction, it will push against the first valve 200, causing the first valve 200 to adhere to the outer wall where the first gas is located, thereby blocking the first vent 142a.

[0043] Extendably, the connecting section 143 is provided with an elastic element that pushes the first valve core 210 toward the first vent 142a. The elastic element can be a compression spring and is located between the valve core and the inner wall of the connecting section 143. When the negative pressure generated in the liquid chamber 110 requires gas to pass through the first vent 142a, it will overcome the elastic force of the elastic element and push the first valve core 210 away from the first vent 142a to allow gas to enter the liquid chamber 110. At this time, the first valve 200 is in the first state. When there is no longer a negative pressure in the liquid chamber 110 (including the exhaust state and the idle state), the first valve core 210 automatically resets and blocks the first vent 142a under the action of the elastic element, so that the first valve 200 switches to the second state and prevents gas from flowing in the flow path. Based on this, further application in preventing ink leakage occurs. During the process of sealing the second valve 300, since the gas flow has stopped, the first valve 200, switched to its second state, blocks the flow path, effectively preventing ink from continuing to flow to the first vent 142a, thus achieving a good leak-proof effect. Of course, see also... Figure 6 In this embodiment, even without an elastic element in the connecting section 143, one-way conduction can still be achieved. If the liquid or gas in the liquid chamber 110 wants to pass from the connecting section 143 to the first gas hole 142a, the first valve core 210 will automatically close the first gas 142a under the push of the liquid or gas, thereby realizing the one-way valve function.

[0044] Continue reading Figure 4The connecting section 143 is provided with a guide portion 143a, through which the first valve core 210 is guided to move along the second direction. In this embodiment, the connecting section 143 is located outside the first vent 142a in the second direction. The guide portion 143a extends along the second direction and has a columnar structure. The middle part of the first valve core 210 is provided with a guide through hole adapted to the guide portion 143a. When the guide portion 143a passes through the guide through hole, it can guide the first valve core 210. One or more first vents 142a can be provided between the middle section 142 and the connecting section 143. In this embodiment, two are provided, stacked relative to the guide portion 143a. Both first vents 142a are located within the coverage area of ​​the first valve core 210, and therefore can be blocked by the first valve core 210.

[0045] In another embodiment, the box body 100 includes a first sealing film 400 and a second sealing film 500. The first sealing film 400 is disposed at the end of the intermediate section 142 away from the first vent 142a to block the opening between the intermediate section 142 and the liquid cavity 110. The second sealing film 500 is disposed on the side of the connecting section 143 away from the first vent 142a to block the opening between the box body 100 and the outside. During the molding process of the box body 100, due to the mold setting, it is necessary to connect one end of the intermediate section 142 to the liquid cavity 110 and the connecting section 143 to the outside. At this time, sealing the inner and outer openings by means of sealing film pasting or welding can reduce costs and facilitate mass production. When the second sealing film 500 is not attached, the connecting section 143 has an inward structure on the outer wall of the box body 100. After the second sealing film 500 blocks the outer opening, it can be flush with the outer wall, thereby making the outer surface of the box body 100 flat for installation.

[0046] See Figure 4 The cartridge body 100 also includes a second vent 151 connecting the second channel 150 and the connecting section 143. The connecting section 143 includes a large head 143b located in the second direction of the first vent 142a and a small head 143c covering the second vent 151. The first valve core 210 is located inside the large head 143b and its width is greater than that of the small head 143c, so that the first valve core 210 is placed in the large head 143b of the connecting section 143 to open and close the first vent 142a. The structural design of the large head 143b and the small head 143c increases the gas flow rate when the gas flows from the first vent 142a to the second vent 151, which is beneficial to the air intake process. At the same time, if there is a reverse exhaust state, the widened structure can prevent the gas from escaping, preventing exhaust leakage, and has the same effect on ink leakage.

[0047] In another embodiment, see Figures 3 to 7The second channel 150 has a vent 152 that communicates with the liquid chamber 110. The second valve 300 includes an elastic member 310 and a second valve core 320 that can move in the second channel 150. The second channel 150 has a third position and a fourth position on the movement path of the second valve core 320. When the second valve core 320 moves to the third position, the second valve core 320 moves away from the vent 152, so that the vent 152 is connected to the liquid chamber 110. At this time, the second valve body is in the third state. When the second valve core 320 moves to the fourth position, the second valve core 320 blocks the inside of the vent 152 and isolates the second channel 150 from the liquid chamber 110. At this time, the second valve 300 is in the fourth state. The elastic component 310 is used to block the vent 152 in the non-air intake state. It is disposed between the second valve core 320 and the second air hole 151 and provides an elastic force to move the second valve core 320 toward the vent 152. When the negative pressure no longer occurs in the liquid chamber 110 or the generated negative pressure is insufficient to overcome the elastic force of the elastic component 310, the second valve core 320 moves to the fourth position under the action of the elastic component 310 and automatically closes the vent 152 to prevent gas or liquid from entering from the vent 152.

[0048] In conjunction with the foregoing embodiments, it should be further noted that, in addition to the aforementioned one-way ventilation structure, the first valve 200 and the second valve 300 may also be other one-way ventilation structures in the prior art, all of which are within the scope of this utility model.

[0049] In addition, please continue to refer to Figure 3 The ink cartridge also includes a deformable gas storage bag 600. The gas storage bag 600 can be made of plastic materials such as polypropylene, or other materials that can expand and contract elastically; there are no strict limitations. The cartridge body 100 is provided with a gas exchange port 160, and the gas storage bag 600 is provided with a bag opening 610. The bag opening 610 can be sealed to the gas exchange port 160 by means of threaded connection or other methods. For example, a gas connector is provided on the carriage used to mount the ink cartridge in the device body. The gas connector connects to a gas supply component inside the device body, which can be a gas canister, cylinder, etc. The interior of the gas storage bag 600 is isolated from the ink in the liquid chamber 110. During the ink supply process, the gas connector introduces gas into the gas storage bag 600. After the gas bag 600 expands, it occupies space in the liquid chamber 110, compressing the ink and supplying it from the liquid connection hole 120 to the liquid jet head, thus realizing the ink supply process. Even when gas is present in the ink, the expansion of the gas collection bag 600 can still achieve a squeezing effect on the ink due to the one-way blocking of the first valve 200 and the second valve 300.

[0050] In another embodiment of this utility model, when the box body 100 is in use, the gas communication hole 130 is located higher than the highest liquid level in the liquid chamber 110, for example in... Figure 2 In the embodiment shown, the gas communication hole 130 is located on the highest surface of the cartridge body 100. When in use, the ink level is lower than the gas communication hole 130, and even if the first valve 200 and the second valve 300 fail, there will be no leakage from the gas communication hole 130, thus improving the overall reliability of the ink cartridge.

[0051] Finally, it should be noted that the above description is merely the preferred embodiment of this utility model and is not intended to limit the utility model in any way. Any person skilled in the art can make many possible changes and simple substitutions to the technical solution of this utility model using the disclosed methods and technical content without departing from the scope of the technical solution of this utility model, and these all fall within the protection scope of the technical solution of this utility model.

Claims

1. An ink cartridge, characterized in that, include: The box body has an internal liquid cavity for storing liquid, and an external liquid communication hole and a gas communication hole connected to the liquid cavity. A first valve is located in the flow path between the gas communication hole and the liquid chamber, and can be switched between a first state and a second state. In the first state, the first valve allows gas to pass through the flow path, and in the second state, it closes the flow path. The second valve is located downstream of the first valve along the flow path from the gas communication hole toward the liquid chamber. The second valve has a third state and a fourth state. In the third state, the second valve allows gas to pass through the flow path. In the fourth state, the second valve closes the flow path. Specifically, when gas flows from the gas communication hole to the liquid cavity in the flow path, the first valve is in the first state and the second valve is in the third state; when gas flows from the liquid cavity to the gas communication hole in the flow path, the first valve is in the second state and the second valve is in the fourth state.

2. The ink cartridge according to claim 1, characterized in that, The box body is provided with a continuous first channel and a second channel for forming the flow path, the first valve is provided on the first channel, and the second valve is provided on the second channel.

3. The ink cartridge according to claim 2, characterized in that, The first channel includes an air inlet section, an intermediate section, and a connecting section. The air inlet section communicates with the gas communication hole and extends along a first direction. The intermediate section extends along a second direction different from the first direction and has a first air hole communicating with the connecting section. The connecting section communicates with the second channel. The first valve includes a first valve core disposed within the connecting section and movable within the connecting section. When the first valve core moves to the first position, the first valve is in the first state and the first valve core leaves the first air hole. When the first valve core moves to the second position, the first valve is in the second state and the first valve core blocks the first air hole.

4. The ink cartridge according to claim 3, characterized in that, The connecting section is provided with a guide portion, and the first valve core is guided by the guide portion to move along the second direction.

5. The ink cartridge according to claim 4, characterized in that, The box body includes a first sealing film and a second sealing film. The first sealing film is disposed at the end of the middle section away from the first vent to block the opening between the middle section and the liquid chamber. The second sealing film is disposed on the side of the connecting section away from the first vent to block the opening between the box body and the outside.

6. The ink cartridge according to claim 4, characterized in that, The box body also includes a second air hole that connects the second channel and the connecting section. The connecting section includes a large head located in a second direction of the first air hole and a small head covering the second air hole. The first valve core is located inside the large head and its width is greater than that of the small head.

7. The ink cartridge according to claim 2, characterized in that, The second channel has a vent that communicates with the liquid chamber and a second vent that communicates with the first channel. The second valve includes an elastic component and a second valve core that can move in the second channel. When the second valve core is in the third position, the second valve body is in the third state and the second valve core is away from the vent. When the second valve core is in the fourth position, the second valve body is in the fourth state and the second valve core blocks the vent. The elastic component provides elastic force to seal the second valve core at the vent.

8. The ink cartridge according to any one of claims 1 to 7, characterized in that, It also includes a deformable gas storage bag, and the box body is provided with a gas exchange port that communicates with the gas storage bag, and the gas storage bag is located in the liquid cavity.

9. The ink cartridge according to any one of claims 1 to 7, characterized in that, When the box body is in use, the gas communication hole is located above the highest liquid level in the liquid chamber.

10. An ink ejection device, characterized in that, It includes a device body and an ink cartridge as described in any one of claims 1 to 9 disposed within the device body.

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