Ink cartridge

Abstract

Provided is an ink cartridge, comprising a cartridge body (1). The cartridge body is provided with a liquid storage cavity (111) for storing a liquid; the liquid storage cavity is provided with an opening; a sealing film (13) used for sealing the liquid storage cavity is provided at the opening; a piercing member (2) is movably provided on the cartridge body; the piercing member is provided with an abutted portion (21) and a piercing portion (22) used for piercing the sealing film; the peripheral wall of the piercing portion is provided with at least one groove (222b) recessed in the axial direction of the piercing portion. The piercing member is provided with the groove recessed in the axial direction of the piercing portion, so that when the piercing portion pierces the sealing film, the liquid storage cavity is communicated with the outside by means of the groove, ensuring normal outflow of an ink during printing, ensuring use of the ink cartridge.

Description

An ink cartridge

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 28, 2023, with application number 202322027355.7 and application name “A Kind of Ink Cartridge”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the technical field of printing devices, and in particular to an ink cartridge. Background Art

[0003] Existing ink cartridges are generally provided with an ink storage chamber and an air vent connected to the ink storage chamber. When the ink cartridge is not in use, a sealing film is usually provided at the air vent to seal the air vent to prevent the ink in the ink storage chamber from flowing out of the air vent and leaking. When the ink cartridge is installed in the printer, it is necessary to manually tear off the sealing film from the ink cartridge to expose the air vent, so that the ink storage chamber is connected to the outside atmosphere to prevent the ink from not flowing out smoothly due to negative pressure in the ink storage chamber during printing. However, the operation of manually tearing off the sealing film makes the use of the ink cartridge more cumbersome, and when the user forgets to tear off the sealing film, the ink in the ink storage chamber cannot flow out smoothly during printing, which may cause damage to the printer. Patent document with application number 202221508906.0 provides an ink cartridge provided with an air guide, which pierces the seal of the ink storage chamber of the ink cartridge to form an air vent, thereby simplifying the use of the ink cartridge.

[0004] However, in order to prevent the sealing film of the ink cartridge from being damaged during transportation and storage, resulting in ink leakage, and to avoid the corrosive effects of the ink on the sealing film, the sealing film is usually made of a plastic material with good toughness. When the air guide member in the above-mentioned patent document is used to puncture the sealing film, the sealing film will completely wrap the outer periphery of the air guide member, resulting in no air intake space being formed between the sealing film and the air guide member, affecting the use of the ink cartridge.

[0005] Summary of the Invention

[0006] The present application provides an ink cartridge to solve the problem that when an air guide pierces a sealing film, the sealing film completely wraps the periphery of the air guide, resulting in no air intake space being formed between the sealing film and the air guide, thus affecting the use of the ink cartridge.

[0007] According to one aspect of the present application, there is provided an ink cartridge that is detachably mounted in an image forming device, the ink cartridge comprising:

[0008] The box body is provided with a liquid storage cavity for storing liquid, the liquid storage cavity has an opening, and a sealing film is provided on the opening for sealing the liquid storage cavity;

[0009] A piercing member is movably arranged on the cartridge body, the piercing member having an abutted portion and a piercing portion for piercing the sealing film, the outer peripheral wall of the piercing portion being provided with at least one groove axially recessed toward the piercing portion, the liquid storage chamber being configured to communicate with the outside through the groove when the abutted portion receives the force of the ink cartridge mounting portion and the piercing portion moves along the piercing direction and pierces the sealing film.

[0010] The present application provides a groove axially concave toward the piercing portion through the piercing component, so that when the piercing portion pierces the sealing membrane, the liquid storage chamber is connected to the outside through the groove, ensuring the normal outflow of ink during printing, thereby ensuring the use of the ink cartridge.

[0011] In a possible embodiment, the piercing portion is further provided with at least one ventilation groove connected to the groove, and the liquid storage cavity is connected to the outside world through the groove and the ventilation groove in sequence.

[0012] In one possible embodiment, the piercing portion further has a contact surface, which is configured to abut against the sealing membrane after the piercing portion pierces the sealing membrane, and at least a portion of the vent groove is located on the side of the contact surface away from the liquid storage chamber in the piercing direction, and at least a portion of the groove is located on one side of the contact surface in the piercing direction, and at least another portion is located on the other side of the contact surface.

[0013] In one possible embodiment, the piercing portion includes an inner cylinder and an outer cylinder, the outer cylinder is located radially outside the inner cylinder, the inner cylinder is provided with a tip for piercing the sealing membrane, the groove is arranged on the outer peripheral wall of the inner cylinder, and the ventilation groove is arranged on the outer cylinder.

[0014] In a possible implementation manner, a cavity is provided between the inner column and the outer column, and the vent groove is connected to the groove through the cavity.

[0015] In a possible implementation manner, a rib is connected between the inner cylinder and the outer cylinder, and the contact surface is formed on a surface of the outer cylinder and / or the rib facing the liquid storage cavity.

[0016] In a possible embodiment, the box body includes a cavity and a cover body connected to each other, the liquid storage chamber is arranged in the cavity, and the puncturing member is movably arranged in the cover body.

[0017] In a possible embodiment, the puncturing member has a mounting portion that is interference-fitted with the cover body, and the puncturing member is movably disposed in the cover body via the mounting portion; or, the puncturing member is movably connected to the cover body via a strip-shaped connecting portion.

[0018] In a possible embodiment, a labyrinth channel is provided in the cavity, and the liquid storage cavity can be connected to the groove through the labyrinth channel.

[0019] In a possible embodiment, the ink cartridge installation portion is provided with a pushing portion, the pushing portion acts on the abutted portion, and a direction of the force exerted by the abutting portion on the abutted portion intersects with the installation direction of the ink cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic structural diagram of the ink cartridge of the present application;

[0021] FIG2 is a cross-sectional view of the ink cartridge of the present application;

[0022] FIG3 is a schematic structural diagram of the cavity of the present application;

[0023] FIG4 is a schematic structural diagram of the puncturing member of the present application;

[0024] FIG5 is a bottom view of the piercing member of the present application;

[0025] FIG6 is a top view of another embodiment of the ink cartridge of the present application;

[0026] FIG7 is a partial structural diagram of the piercing member, connecting portion and cover body of the present application;

[0027] FIG8 is a schematic diagram of the ink cartridge of the present application being installed.

[0028] Reference numerals:

[0029] 1-box body; 11-cavity; 111-liquid storage chamber; 112-labyrinth channel; 12-cover; 121-air cavity; 122-accommodating part; 122a-locking surface; 122b-avoidance surface; 123-chip holder; 124-protrusion; 125-pressing part; 1251-rib; 13-sealing film; 2-piercing member; 21-abutted part; 22-piercing part; 222-inner cylinder; 222a-tip; 222b-groove; 223-outer cylinder; 223a-venting groove; 224-cavity; 225-rib; 226-contact surface; 23-mounting part; 24-connecting part; 3-chip; 4-cartridge mounting part; 41-sensor; 42-locking piece; 43-pushing part; 431-guide surface. DETAILED DESCRIPTION

[0030] The present application is further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only a portion of the embodiments of the present application, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments in the present application without creative effort are intended to fall within the scope of protection of the present application.

[0031] It should be noted that the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0032] In this application, unless otherwise specified or limited, the terms "installed," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] In the above description, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0035] The present application provides an ink cartridge that is removably installed in an ink cartridge installation portion 4 of an image forming device. Referring to Figure 8 , Figure 8 illustrates an ink cartridge being installed in the ink cartridge installation portion 4 along a second direction X. The ink cartridge installation portion 4 is provided with a sensor 41, a locking member 42, a contact pin, and a push portion 43. The push portion 43 is provided with an inclined guide surface 431. The ink cartridge installation portion 4 may also be provided with an intermediate member (not shown). In this embodiment, the second direction X is the installation direction of the ink cartridge.

[0036] 1-2 , the ink cartridge includes a cartridge body 1 , a puncturing member 2 and a chip 3 .

[0037] The box body 1 includes a cavity 11 and a cover 12 that are detachably connected to each other. The cover 12 is located above the cavity 11 in a first direction Y. In this embodiment, the first direction Y is a vertical direction.

[0038] The cover 12 is provided with a receiving portion 122 , a chip frame 123 and a protrusion 124 in sequence along the installation direction of the ink cartridge.

[0039] The chip holder 123 is detachably connected to the cover 12. A chip 3 is housed within the chip holder 123, tilted relative to the surface of the cover 12 facing away from the cavity 11. Chip 3 is provided with electrodes. When an ink cartridge is installed in the ink cartridge mounting portion 4, the electrodes contact and electrically connect with contact pins within the ink cartridge mounting portion 4. Chip 3 stores information related to the ink cartridge.

[0040] The accommodating portion 122 of the cover 12 is located behind the chip 3 in the direction of ink cartridge installation and is higher than the chip 3 in the first direction Y. This protects the chip 3 from damage when the ink cartridge is subjected to external forces or dropped. Referring to Figure 8 , the surface of the accommodating portion 122 closest to the rear surface of the ink cartridge (i.e., the surface closest to the rear surface in the direction of ink cartridge installation) forms a locking surface 122a. When the ink cartridge is installed in the ink cartridge mounting portion 4, the locking surface 122a abuts against the locking member 42 in the ink cartridge mounting portion 4, ensuring the ink cartridge is stably installed in the ink cartridge mounting portion 4.

[0041] An avoidance surface 122b is provided in front of the accommodating portion 122 (i.e., in front of the installation direction of the ink cartridge), and the avoidance surface 122b is inclined to the surface of the accommodating portion 122 close to the front surface of the ink cartridge (i.e., close to the surface in front of the installation direction of the ink cartridge) to avoid interference between the structure inside the ink cartridge installation portion 4 and the accommodating portion 122 when the ink cartridge is installed.

[0042] The protrusion 124 can strengthen the strength of the cover 12 and can also block the signal sent by the sensor 41 in the ink cartridge installation portion 4. The protrusion 124 can be integrally formed with the chip frame 123. It is understood that the protrusion 124 is also detachably connected to the cover 12.

[0043] The cover body 12 is provided with a pressing portion 125 behind the accommodating portion 122 in the installation direction of the ink cartridge. When the user replaces the ink cartridge, the user presses the pressing portion 125 to disengage the locking piece 42 in the ink cartridge installation portion 4 from the locking surface 122a, thereby allowing the ink cartridge to be taken out of the ink cartridge installation portion 4.

[0044] A plurality of ribs 1251 are provided on the surface of the pressing portion 125 , and the plurality of ribs can increase friction when the user presses the pressing portion 125 .

[0045] Referring to Figure 3, the housing 11 includes a liquid storage chamber 111 for storing liquid, i.e., ink. A labyrinthine passage 112 may also be provided within the liquid storage chamber 111. The liquid storage chamber 111 has an opening. The lid 12 includes an air chamber 121, which communicates with the outside atmosphere. A sealing membrane 13 is provided between the opening of the liquid storage chamber 111 and the air chamber 121 to seal the liquid storage chamber 111. Multiple liquid storage chambers 111 may be provided, each with its own opening. Only the opening corresponding to the location of the piercing member 2 is required for piercing by the piercing member 2. The sealing membrane 13 may be a single, single piece covering all openings of the liquid storage chambers 111 for ease of manufacturing, or multiple, separate pieces covering different openings of different liquid storage chambers 111 for easier replacement and maintenance. The sealing membrane 13 may be made of PP film, PE film, PS film, or aluminized film, among other materials.

[0046] The piercing member 2 is movably disposed within the cover 12 and is configured to pierce the sealing membrane 13. Specifically, the piercing member 2 is mounted within the accommodating portion 122. Referring to Figures 4-5, the piercing member 2 comprises an abutted portion 21 for interacting with the abutting portion 43 of the ink cartridge mounting portion 4 or the intermediate member, and a piercing portion 22 for piercing the sealing membrane 13. The piercing portion 22 has at least one groove 222b disposed on its outer circumference, recessed axially toward the piercing portion 22. The liquid storage chamber 111 is configured such that when the abutted portion 21 receives force from the ink cartridge mounting portion 4 and the piercing portion 22 moves in the piercing direction and pierces the sealing membrane 13, the liquid storage chamber 111 communicates with the outside world through the groove 222b. By providing the piercing member 2 with the groove 222b recessed axially toward the piercing portion 22, the liquid storage chamber 111 communicates with the outside world through the groove 222b after the piercing portion 22 pierces the sealing membrane 13, ensuring normal ink flow during printing and thus ensuring the use of the ink cartridge.

[0047] In this embodiment, the abutted portion 21 is located at the upper portion of the piercing member 2, and the piercing portion 22 is located at the lower portion of the piercing member 2. In the first direction Y, the upper surface of the abutted portion 21 is lower than the upper surface of the receiving portion 122. This prevents the piercing member 2 from moving downward under the action of external forces and piercing the sealing membrane 13 when the ink cartridge is not fully installed in the ink cartridge installation portion 4.

[0048] The liquid storage chamber 111 is communicated with the groove 222 b through the labyrinth channel 112 .

[0049] In a possible embodiment, at least one ventilation groove 223a communicating with the groove 222b is further provided on the piercing portion 22, and the liquid storage cavity 111 is communicated with the outside world through the groove 222b and the ventilation groove 223a in sequence.

[0050] The piercing portion 22 comprises an inner cylinder 222 and an outer cylinder 223, with the outer cylinder 223 located radially outward of the inner cylinder 222. A tip 222a is provided at the bottom end of the inner cylinder 222 for piercing the sealing membrane 13. The outer circumferential wall of the inner cylinder 222 is provided with at least one groove 222b recessed axially toward the inner cylinder 222. If there are multiple grooves 222b, they may extend axially to varying lengths or have varying depths. A cavity 224 may be provided between the outer cylinder 223 and the inner cylinder 222. A rib 225 may also be connected between the outer cylinder 223 and the inner cylinder 222, extending radially along the inner cylinder 222.

[0051] The outer cylinder 223 is further provided with at least one vent groove 223a, which is located radially outward of the groove 222b in the inner cylinder 222. That is, the distance between the vent groove 223a and the central axis of the piercing portion 22 is greater than the distance between the groove 222b and the central axis of the piercing portion 22. The vent groove 223a and the groove 222b may or may not be aligned along the radial direction of the inner cylinder 222, as long as the vent groove 223a is directly or indirectly connected to the groove 222b to enable gas exchange therebetween.

[0052] In this embodiment, there are multiple vent grooves 223a, evenly distributed along the circumference of the inner cylinder 222. There are also multiple grooves 222b, evenly distributed along the circumference of the inner cylinder 222. Specifically, there are four vent grooves 223a and four grooves 222b, which correspond one to one and are aligned in the radial direction. The vent grooves 223a and the grooves 222b are connected through the cavity 224 between the outer cylinder 223 and the inner cylinder 222. The vent grooves 223a are located radially outward of the grooves 222b. This arrangement ensures that when the piercing portion 22 pierces the sealing membrane 13, the punctured sealing membrane 13 tends to wrap around the outer periphery of the grooves 222b and is unlikely to wrap around the vent grooves 223a located radially outward of the grooves 222b. The grooves 222b are connected to the outside world through the vent grooves 223a. The liquid storage chamber 111 is connected to the outside world through the grooves 222b and the vent grooves 223a in sequence, ensuring normal outflow of ink during printing.

[0053] Furthermore, in this embodiment, the piercing portion 22 also has a contact surface 226, which is used to abut against the sealing membrane 13 after the piercing portion 22 pierces the sealing membrane 13 along the piercing direction, so as to better limit the position of the sealing membrane 13, and then ensure the communication between the vent groove 223a and the groove 222b and the liquid storage chamber 111 by setting the relative position of the contact surface 226 and the vent groove 223a and the groove 222b.

[0054] The contact surface 226 is formed on the surface of the outer cylinder 223 and / or the rib 225 facing the liquid storage chamber 111. Specifically, the contact surface 226 can be formed on the surface of the outer cylinder 223 facing the liquid storage chamber 111, that is, the lower surface of the outer cylinder 223, or on the surface of the rib 225 facing the liquid storage chamber 111, that is, the lower surface of the rib 225, or on the surfaces of the outer cylinder 223 and the rib 225 facing the liquid storage chamber 111.

[0055] For example, in this embodiment, the lower surface of the outer cylinder 223 is flush with the lower surface of the rib 225, that is, the contact surface 226 is formed on the lower surfaces of the outer cylinder 223 and the rib 225. At least a portion of the vent groove 223a is located behind the contact surface 226 in the puncture direction, that is, at least a portion of the vent groove 223a is located on the side of the contact surface 226 away from the liquid storage chamber 111 in the puncture direction. In this embodiment, the vent groove 223a is entirely located behind the contact surface 226 in the puncture direction, while the groove 222b is at least partially located on one side of the contact surface 226 in the puncture direction and at least another portion is located on the other side of the contact surface 226. That is, at least a portion of the groove 222b is located in front of the contact surface 226 in the puncture direction and at least a portion is located behind the contact surface 226.

[0056] In this embodiment, the piercing direction is parallel to the first direction Y, i.e., parallel to the vertical direction, and is directed downward in the vertical direction. The front of the piercing direction is downward in the vertical direction, and the rear of the piercing direction is upward in the vertical direction. After the piercing portion 22 pierces the sealing membrane 13, the contact surface 226 abuts the sealing membrane 13. The vent groove 223a is located above the contact surface 226 in the first direction Y, i.e., above the sealing membrane 13. At least a portion of the groove 222b is located below the contact surface 226 in the first direction Y, i.e., below the sealing membrane 13, and at least a portion of the groove 222b is located above the contact surface 226 in the first direction Y, i.e., above the sealing membrane 13. This ensures that when the sealing membrane 13 abuts the contact surface 226, the portion of the groove 222b located above the contact surface 226 is less likely to be enclosed by the sealing membrane 13 due to the obstruction of the contact surface 226 against the sealing membrane 13. This portion communicates with the vent groove 223a, thereby forming a gas exchange channel connecting the liquid storage chamber 111 with the outside world. In other embodiments, the contact surface 226 may not be provided. Instead, the depth of the inner cylinder 222 penetrating the opening of the liquid storage chamber 111 is controlled by adjusting the displacement of the piercing portion 22 along the piercing direction, thereby preventing the sealing membrane 13 from completely wrapping around the outer periphery of the inner cylinder 222, thereby enclosing the groove 222b and preventing it from communicating with the vent groove 223a. In this embodiment, the vent groove 223a is a groove provided on the contact surface 226. In other embodiments, the vent groove 223a may also be a hole. In other embodiments, the piercing direction may also be inclined relative to the first direction Y, and the piercing member 2 may also be inclined relative to the first direction Y, as long as it can move under the action of the push portion 43 and pierce the sealing membrane 13.

[0057] In one possible embodiment, the piercing member 2 further includes a mounting portion 23 that is interference-fitted with the cover 12. The piercing member 2 is movably disposed within the cover 12 via the mounting portion 23. When the ink cartridge is installed in the ink cartridge mounting portion 4, the abutted portion 21 is subjected to a force from the ink cartridge mounting portion 4. Specifically, this force may be exerted on the abutted portion 21 by the resisting portion 43 via the guide surface 431, or by the resisting portion 43 via an intermediate member. This causes the piercing member 2 to move downward in the first direction Y, thereby piercing the sealing membrane 13. The interference fit between the mounting portion 23 and the cover 12 allows the piercing member 2 to remain stationary when not subjected to external force, but to move relative to the cover 12 when subjected to a force from the resisting portion 43 or the intermediate member.

[0058] In this embodiment, the mounting portion 23 may be a boss that is interference fit with the air cavity 121 .

[0059] The direction of the force exerted by the pushing portion 43 on the abutted portion 21 intersects with the installation direction of the ink cartridge.

[0060] 6-7 , in other embodiments, the mounting portion 23 can be replaced with a connecting portion 24, and the piercing member 2 is movably connected to the cover 12 via the strip-shaped connecting portion 24. The connecting portion 24 provides a certain supporting force. Specifically, the end of the connecting portion 24 connected to the piercing member 2 can be tilted upward relative to the end connected to the cover 12, thereby enhancing the supporting force. This allows the piercing member 2 to remain stationary under the action of the connecting portion 24 when no external force is applied, and to move relative to the cover 12 when the force of the abutting portion is applied.

[0061] In other embodiments, a hollow channel can be provided in the piercing member 2, which passes through the piercing member 2. One end of the hollow channel is connected to the outside world, and the other end is connected to the piercing portion 22, for example, connected to the groove 222b or passes through the tip 222a for piercing the sealing membrane 13, so that when the piercing member 2 pierces the sealing membrane 13, the liquid storage chamber 111 is connected to the outside world through the hollow channel.

[0062] In other embodiments, the inner cylinder 222 may be provided with a circular ring protruding radially outward, and the lower surface of the circular ring serves as the contact surface 226. The bottom end of the groove 222b is lower than the circular ring, and is used to communicate with the liquid storage chamber 111 after the sealing membrane 13 is punctured. The top end of the groove 222b is higher than the circular ring and communicates with the outside world. In this case, the outer cylinder 223 may not be provided.

[0063] The above are only some embodiments of the present application. Those skilled in the art will be able to make various modifications and improvements, or freely combine the above technical solutions, including freely combining the technical features of the above different embodiments, without departing from the inventive concept of the present application. All of these are within the scope of protection of the present application.

Claims

1. An ink cartridge detachably mounted in an ink cartridge mounting portion of an image forming device, characterized in that: The ink cartridge comprises: The box body is provided with a liquid storage cavity for storing liquid, the liquid storage cavity has an opening, and a sealing film for sealing the liquid storage cavity is provided on the opening; A piercing member is movably arranged on the box body, the piercing member has an abutted portion and a piercing portion for piercing the sealing film, the outer peripheral wall of the piercing portion is provided with at least one groove axially recessed toward the piercing portion, and the liquid storage chamber is constructed so that when the abutted portion receives the force of the ink cartridge mounting portion and the piercing portion moves along the piercing direction and pierces the sealing film, the liquid storage chamber is connected with the outside through the groove.

2. The ink cartridge according to claim 1, characterized in that: The piercing portion is also provided with at least one ventilation groove connected with the groove, and the liquid storage cavity is connected with the outside through the groove and the ventilation groove in sequence.

3. The ink cartridge according to claim 2, characterized in that: The piercing portion also has a contact surface, and the contact surface is configured to abut against the sealing membrane after the piercing portion pierces the sealing membrane, and at least a portion of the vent groove is located on a side of the contact surface away from the liquid storage chamber in the piercing direction, and at least a portion of the groove is located on one side of the contact surface in the piercing direction, and at least another portion is located on the other side of the contact surface.

4. The ink cartridge according to claim 3, characterized in that: The piercing portion includes an inner cylinder and an outer cylinder, wherein the outer cylinder is located radially outside the inner cylinder, the inner cylinder is provided with a tip for piercing the sealing membrane, the groove is arranged on the outer peripheral wall of the inner cylinder, and the ventilation groove is arranged on the outer cylinder.

5. The ink cartridge according to claim 4, characterized in that: A cavity is provided between the inner cylinder and the outer cylinder, and the venting groove is connected with the groove through the cavity.

6. The ink cartridge according to claim 5, characterized in that: Ribs are connected between the inner cylinder and the outer cylinder, and the contact surface is formed on the surface of the outer cylinder and / or the ribs facing the liquid storage cavity.

7. The ink cartridge according to any one of claims 1 to 6, characterized in that: The box body comprises a cavity body and a cover body connected to each other, the liquid storage cavity is arranged in the cavity body, and the piercing member is movably arranged in the cover body.

8. The ink cartridge according to claim 7, characterized in that: The piercing member has a mounting portion that is interference-fitted with the cover body, and the piercing member is movably disposed in the cover body via the mounting portion; or, the piercing member is movably connected to the cover body via a strip-shaped connecting portion.

9. The ink cartridge according to claim 7, characterized in that A labyrinth channel is provided in the cavity, and the liquid storage cavity can be connected with the groove through the labyrinth channel.

10. The ink cartridge according to any one of claims 1 to 6, characterized in that: The ink cartridge installation portion is provided with a push portion, the push portion acts on the abutted portion, and the direction of the force exerted by the abutting portion on the abutted portion intersects with the installation direction of the ink cartridge.

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