An ink cartridge

Abstract

The application discloses an ink cartridge, comprising: an ink cartridge main body, an air-liquid exchange cavity, a main ink storage cavity and a gas guide cavity are arranged in the ink cartridge main body, an external interface is formed on the outer wall surface of the ink cartridge main body, an air inlet and a main liquid inlet are arranged on the inner wall surface of the air-liquid exchange cavity; a sealing element is arranged in the air-liquid exchange cavity, the air inlet and the main liquid inlet are located on opposite sides of the sealing element, and the air inlet is closer to the external interface than the sealing element; the external interface has a first end portion and a second end portion, the first end portion is farther away from the sealing element than the second end portion, the air inlet is arranged close to the first end portion, and the projection of the air inlet on the second direction is dislocated from the sealing element or partially falls on the sealing element. According to the application, the air inlet is arranged on the first end portion which is farther away from the sealing element in the first direction, so that the air inlet is not easily completely shielded even if the sealing element is not installed in place or is in an inclined posture, and thus the abnormal opening of the gas guide channel can be effectively prevented, and the normal use of the ink cartridge is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of printing consumables, in particular to an ink cartridge. Background Art

[0002] At present, some compatible manufacturers have launched a type of ink cartridge without air guide membrane, which can automatically open the air guide channel during the installation process.

[0003] This type of ink cartridge typically features a gas-liquid exchange chamber at the bottom ink outlet, connected to the air channel. A thin membrane seals the bottom of the chamber, allowing the air channel to connect to the atmosphere by puncturing the membrane with an ink supply needle. To ensure the effective volume of the ink cartridge, the gas-liquid exchange chamber is typically small in practice, with its plumb dimension also small. Most of the space within the chamber accommodates the seal that seals the ink channel, and an air inlet is provided at the lower end of the sidewall to connect to the air channel. Therefore, the end face of the seal is typically relatively close to the membrane, and at least a portion of the air inlet is not obscured by the seal.

[0004] If the seal is installed abnormally, such as it is not pushed into place in the plumb direction, or the seal is installed into the gas-liquid exchange chamber in a posture that is sunken close to the side of the air guide channel, and the action between the ink supply needle and the seal during the installation of the ink cartridge is not sufficient to correct its installation posture, the air guide channel may not be opened normally, such as the opening amplitude is insufficient or it cannot be stably maintained in the open state (intermittent opening), thereby affecting the normal use of the ink cartridge. Summary of the Invention

[0005] The purpose of the present invention is to provide an ink cartridge that can prevent the abnormal opening of the air guide channel caused by improper installation of the sealing member, so as to solve the technical problems in the prior art.

[0006] The present invention provides an ink cartridge that can be installed in a mounting portion of a printing device along a first direction, the ink cartridge comprising:

[0007] An ink cartridge body, wherein a gas-liquid exchange chamber, a main ink storage chamber, and an air guide chamber are provided in the ink cartridge body, the main ink storage chamber is connected to the air guide chamber, the gas-liquid exchange chamber forms an external interface on the outer wall surface of the ink cartridge body, an air inlet and a main liquid inlet are provided on the inner wall surface of the gas-liquid exchange chamber, the air guide chamber is connected to the gas inlet via an air guide channel, and the main ink storage chamber is connected to the main liquid inlet;

[0008] a sealing member disposed in the gas-liquid exchange chamber, wherein the gas inlet and the main liquid inlet are located on opposite sides of the sealing member, and the gas inlet is closer to the external interface than the sealing member;

[0009] The external interface has a first end and a second end, the first end is farther away from the seal than the second end, the air inlet is arranged close to the first end, the projection of the air inlet in the second direction is misaligned with the seal or partially falls on the seal, and the second direction is orthogonal to the first direction.

[0010] An ink cartridge as described above, wherein preferably, the ink cartridge body has a first surface, an outer protrusion is provided on the first surface, the outer protrusion forms a first wall on the side away from the first surface, the gas-liquid exchange chamber is at least partially formed in the outer protrusion, the gas-liquid exchange chamber passes through the first wall to form the external interface, and the first end is farther away from the first surface than the second end.

[0011] In the ink cartridge as described above, preferably, a preset angle is formed between the first wall surface and the second direction, and the preset angle is ≥5°.

[0012] In the ink cartridge as described above, preferably, the air guide channel passes through the first wall to form a first opening, the air inlet passes through the first wall to form a second opening, and the first opening is connected to the second opening.

[0013] An ink cartridge as described above, wherein, preferably, a recessed portion is formed on the side of the seal facing the external interface, and the projection of the recessed portion in the second direction at least partially overlaps with the air inlet, so that the air inlet can be connected to the external interface through the recessed portion.

[0014] In the ink cartridge as described above, preferably, the recessed portion includes at least one groove, and the groove extends along the radial direction of the sealing member to penetrate the outer wall surface of the sealing member.

[0015] In the ink cartridge as described above, preferably, there are a plurality of grooves, and the plurality of grooves are arranged in a ring-shaped manner with the axis of the sealing member as the center line.

[0016] In the ink cartridge as described above, preferably, there are two recessed portions, and the two recessed portions are symmetrically arranged at opposite ends of the sealing member along the axial direction of the sealing member.

[0017] An ink cartridge as described above, wherein preferably, a sealing ring is formed on the outer wall surface of the sealing member, the sealing ring and the recessed portion are staggered in the first direction, and the sealing member is interference fit in the gas-liquid exchange chamber through the sealing ring.

[0018] An ink cartridge as described above, wherein preferably, the ink cartridge is further provided with a sealing film, the sealing film is adhered to the first wall surface, and the projections of the external interface, the air inlet and the air guide channel in the first direction all fall on the sealing film.

[0019] Compared with the prior art, the present invention arranges the air inlet at the first end portion farther away from the seal in the first direction. Even if the seal is not installed in place or is tilted, the air inlet is not easily completely covered. Therefore, the abnormal opening of the air guide channel can be effectively prevented, thereby ensuring the normal use of the ink cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of an ink cartridge provided by an embodiment of the present invention about to be installed on a mounting portion of a printing device.

[0021] Figure 2 A three-dimensional diagram of an ink cartridge provided in an embodiment of the present invention.

[0022] Figure 3 This is a first-perspective internal structure diagram of the ink cartridge provided by an embodiment of the present invention.

[0023] Figure 4 A partial structural diagram of an ink cartridge provided in an embodiment of the present invention.

[0024] Figure 5 This is a structural diagram of a seal provided by an embodiment of the present invention.

[0025] Figure 6 This is a diagram of the internal structure of the ink cartridge provided by an embodiment of the present invention from a second perspective.

[0026] Figure 7 This is a diagram of the internal structure of the ink cartridge provided by an embodiment of the present invention from a third perspective.

[0027] Description of reference numerals:

[0028] 100-ink cartridge, 101-ink cartridge body, 1011-first surface, 1012-second surface, 102-gas-liquid exchange chamber, 103-external interface, 1031-first end, 1032-second end, 104-main ink storage chamber, 1041-first sub-cavity, 1042-second sub-cavity, 105-secondary ink storage chamber, 106-air guide chamber, 107-air guide channel, 108-air inlet, 109 - air outlet, 110 - communication port, 111 - main liquid inlet, 112 - secondary liquid inlet, 113 - outer convex portion, 114 - first wall, 115 - first opening, 116 - second opening, 117 - leak-proof element, 118 - filter element, 119 - sealing element, 120 - groove, 121 - sealing ring, 122 - sealing membrane, 123 - buffer chamber, 124 - partition, 125 - first block;

[0029] 200-printing device, 201-installation unit, 202-ink supply needle;

[0030] D1-first direction;

[0031] D2 - Second direction. DETAILED DESCRIPTION

[0032] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0033] Reference Figure 1 As shown, Figure 1 This is a schematic diagram of the ink cartridge 100 provided in an embodiment of the present invention about to be installed on the installation portion 201 of the printing device 200. The installation portion 201 has one or more installation positions, and each installation position can be installed in a corresponding ink cartridge 100. Different ink cartridges 100 can store inks of different colors. In a feasible implementation, the installation portion 201 has four installation positions, and four corresponding ink cartridges 100 are provided. The colors of the ink stored in the four ink cartridges 100 are black, yellow, blue, and red, respectively.

[0034] The ink cartridge 100 is detachably installed in the mounting portion 201 along the first direction D1. The top of the mounting portion 201 is open, and the bottom wall of the mounting portion 201 has an ink supply needle 202. The ink cartridge 100 is installed in the mounting portion 201 from the top opening of the mounting portion 201 along the first direction D1. The ink supply needle 202 is used to supply ink in the ink cartridge 100 to the print head, so that the print head can be used to perform printing.

[0035] Reference Figure 1 、 Figure 2 、 Figure 4 as well as Figure 6As shown, to better illustrate the structure of the ink cartridge 100 provided in the embodiment of the present application, a three-dimensional rectangular coordinate system, namely, an XYZ coordinate system, is specifically defined. The X-axis, Y-axis, and Z-axis are mutually perpendicular, and the three-dimensional rectangular coordinate system of the ink cartridge 100 is consistent with the three-dimensional rectangular coordinate system of the mounting portion 201. The direction in which the ink cartridge 100 is installed in the mounting portion 201 is the -Z-axis direction (i.e., the first direction D1), and the direction in which the ink cartridge 100 is removed from the mounting portion 201 is the +Z-axis direction. The opening of the mounting portion 201 is located in the +Z-axis direction, and the ink supply needle 202 is located in the -Z-axis direction. The width of the ink cartridge 100 is the Y-axis direction, which is the direction of the linear array of the multiple mounting positions within the mounting portion 201. The length of the ink cartridge 100 is the X-axis direction (i.e., the second direction D2), which is orthogonal to the first direction D1.

[0036] like Figures 1 to 7 As shown, the present invention provides an ink cartridge 100, comprising an ink cartridge body 101 and a sealing member 119, wherein:

[0037] The ink cartridge body 101 is provided with a gas-liquid exchange chamber 102, a main ink storage chamber 104 and an air guide chamber 106. The main ink storage chamber 104 is communicated with the air guide chamber 106. Ink is pre-stored in the main ink storage chamber 104. The gas-liquid exchange chamber 102 forms an external interface 103 on the outer wall surface of the ink cartridge 100. When the ink cartridge 100 is inserted into the mounting portion 201, the ink supply needle 202 is inserted into the gas-liquid exchange chamber 102 through the external interface 103. An air inlet 108 and a main liquid inlet 111 are provided on the inner wall surface of the gas-liquid exchange chamber 102. The air guide chamber 106 is communicated with the air inlet 108 via an air guide channel 107. Outside air can enter the air guide chamber 106 from the air inlet 108. The main ink storage chamber 104 is communicated with the main liquid inlet 111. The ink in the main ink storage chamber 104 can flow from the main liquid inlet 111 to the gas-liquid exchange chamber 102.

[0038] As the ink stored in the main ink storage chamber 104 flows out, negative pressure will be generated in the main ink storage chamber 104 due to the ink transfer. The existence of negative pressure prevents the ink in the main ink storage chamber 104 from flowing out. Therefore, the main ink storage chamber 104 is connected to the air guide chamber 106 to maintain the gas-liquid balance. The outside air can enter the air guide chamber 106 from the air inlet 108 and then flow into the main ink storage chamber 104. The main ink storage chamber 104 is connected to the outside atmosphere, so the air pressure balance of the main ink storage chamber 104 can be well maintained, ensuring the normal outflow of ink from the main ink storage chamber 104, and also accelerating the outflow speed of the ink.

[0039] Reference Figure 3 、 Figure 4 as well as Figure 5As shown, the seal 119 is arranged in the gas-liquid exchange chamber 102. In the embodiment provided in the present application, the seal 119 is cylindrical and elastic, and its outer diameter can be equal to or slightly larger than the inner diameter of the gas-liquid exchange chamber 102, so that when the seal 119 is installed in the gas-liquid exchange chamber 102, it can fit tightly with the inner wall of the gas-liquid exchange chamber 102, thereby forming a seal for the gas-liquid exchange chamber 102.

[0040] In one feasible embodiment, the sealing member 119 has a valve core, which is a sealing rubber member. After the ink cartridge 100 is installed in the mounting portion 201, the ink supply needle 202 punctures the valve core to achieve ink supply. In another feasible embodiment, a self-closing incision is provided on the valve core. The self-closing incision can be in the shape of a straight line, a cross, or an "*". In the absence of external force, the self-closing incision is in a closed state due to its own elasticity, so that the sealing member 119 can close the gas-liquid exchange chamber 102, and the ink in the main ink storage chamber 104 cannot flow out. After the ink cartridge 100 is installed in the mounting portion 201, the ink supply needle 202 extends into the gas-liquid exchange chamber 102, pushing open the self-closing incision, and the ink in the main ink storage chamber 104 flows out of the ink cartridge body 101 through the ink supply needle 202 until it reaches the print head.

[0041] Reference Figure 3 as well as Figure 4 As shown, the air inlet 108 and the main liquid inlet 111 are located on opposite sides of the sealing member 119. The air inlet 108 is closer to the external interface 103 than the sealing member 119. The sealing member 119 is located between the air inlet 108 and the main liquid inlet 111. When the ink cartridge 100 is not installed to the mounting portion 201, the sealing member 119 blocks the ink in the main ink storage chamber 104 from flowing out through the gas-liquid exchange chamber 102. After the ink cartridge 100 is installed to the mounting portion 201, the sealing member 119 is pierced by the ink supply needle 202, and the ink in the main ink storage chamber 104 flows out of the ink cartridge body 101 through the ink supply needle 202 until it reaches the print head. The sealing member 119 should be arranged to avoid completely blocking the air inlet 108.

[0042] Reference Figure 2 as well as Figure 4 As shown, the external interface 103 has a first end 1031 and a second end 1032. In the first direction D1, the first end 1031 is farther away from the seal 119 than the second end 1032. The air inlet 108 is arranged close to the first end 1031. The air inlet 108 is closer to the external interface 103 than the seal 119 in the first direction D1. The projection of the air inlet 108 in the second direction D2 is misaligned with the seal 119 or partially falls on the seal 119. Even if the seal 119 is not installed in place or is tilted, it is not easy to completely cover the air inlet 108, thereby effectively preventing the air guide channel 107 from opening abnormally, thereby ensuring the normal use of the ink cartridge 100.

[0043] In the embodiments provided in this application, refer to Figure 2 as well as Figure 6 As shown, along the first direction D1, the opposite ends of the ink cartridge body 101 have a first surface 1011 and a second surface 1012. During the installation process of the ink cartridge body 101, the first surface 1011 reaches the installation portion 201 earlier than the second surface 1012. An outer protrusion 113 is protruded on the first surface 1011, and the outer protrusion 113 forms a first wall 114 on the side away from the first surface 1011. The gas-liquid exchange chamber 102 is formed in the outer protrusion 113. The gas-liquid exchange chamber 102 passes through the first wall 114 to form an external interface 103, and the first end 1031 is farther away from the first surface 1011 than the second end 1032.

[0044] Reference Figure 1 As shown, when the ink cartridge body 101 is inserted into the mounting portion 201, the outer protrusion 113 cooperates with the ink supply needle 202. Since the outer protrusion 113 reaches the mounting portion 201 earlier than the ink cartridge body 101, the outer protrusion 113 can play an auxiliary positioning role, guiding the ink cartridge body 101 to be quickly installed into the mounting portion 201 in the correct posture.

[0045] Reference Figure 4 As shown, the first wall 114 is a plane, and the first end 1031 and the second end 1032 are located at opposite ends of the second direction D2 to facilitate processing and forming. A preset angle is formed between the first wall 114 and the second direction D2. The preset angle should not be too large. If it is too large, the distance between the first end 1031 and the second end 1032 in the first direction D1 will be large, which will compress the installation space of the seal 119 and is not conducive to the installation of the seal 119. The preset angle should not be too small. If it is too small, the distance between the first end 1031 and the second end 1032 in the first direction D1 will be small, and the air inlet 108 arranged on the first end 1031 will be easily blocked by the seal 119, affecting the air intake effect. In a feasible embodiment, the preset angle is ≥5°. Preferably, the preset angle is 5°, which can not only provide a larger installation space for the seal 119, but also make the air inlet 108 not easily blocked by the seal 119.

[0046] Those skilled in the art may know that the first wall 114 may not be a smooth plane, but may be a wavy or concave-convex structure, the first end 1031 may be located at the top of the wavy or concave-convex structure, and the second end 1032 may be located at the bottom of the wavy or concave-convex structure, which may also achieve the same technical effect and is not limited here.

[0047] Continue to refer to Figure 4As shown, the air guide channel 107 passes through the first wall 114 to form a first opening 115, and the air inlet 108 passes through the first wall 114 to form a second opening 116. The first opening 115 is connected to the second opening 116. In this way, on the one hand, outside air can enter the air guide cavity 106 from the first opening 115 and the second opening 116, thereby increasing the air intake area and improving the air intake efficiency. The sealing member 119 is not easy to completely cover the air inlet 108. On the other hand, it can reduce the difficulty of molding the air guide channel 107, help simplify the structure of the ink cartridge 100 and reduce the mold cost.

[0048] In the embodiments provided in this application, refer to Figure 3 as well as Figure 5 As shown, a recessed portion is formed on the side of the seal 119 facing the external interface 103, and the projection of the recessed portion in the second direction D2 at least partially overlaps with the air inlet 108. The recessed portion can serve as a channel for air to pass through. When the recessed portion of the seal 119 is opposite to the air inlet 108, external air can enter the air inlet 108 from the recessed portion, thereby further preventing the seal 119 from blocking the air inlet 108 and providing a larger installation space for the seal 119.

[0049] Specifically, refer to Figure 5 As shown, the recessed portion includes at least one groove 120, which is provided at the junction of the end face and the outer circumferential surface of the seal 119. The groove 120 extends radially along the seal 119 until it passes through the outer wall surface of the seal 119. External air can enter the air inlet 108 from the groove 120.

[0050] In a preferred embodiment, in the second direction D2, the width of the groove 120 is wider than the width of the air inlet 108, and in the first direction D1, the depth of the groove 120 is greater than the depth of the air inlet 108, thereby reducing the assembly accuracy requirements of the seal 119, thereby reducing the difficulty of assembling the ink cartridge 100, and at the same time improving the air intake efficiency. Even if the end face of the seal 119 is installed flush with the edge of the first end portion 1031, the air inlet 108 can still fall completely within the range of the groove 120, always maintaining a high-efficiency air intake area.

[0051] Reference Figure 5 As shown, there are multiple grooves 120, and the multiple grooves 120 are arranged in a ring-shaped manner with the axis of the seal 119 as the center line. The multiple grooves 120 are divergent with the axis of the seal 119 as the center line, thereby reducing the assembly accuracy requirements of the seal 119. During the installation process, only one of the grooves 120 needs to be aligned with the position of the air inlet 108, and the installation is convenient and quick.

[0052] Furthermore, two recessed portions are provided, symmetrically disposed at opposite ends of the seal 119 along the axial direction of the seal 119. The positions of the two recessed portions can be mirror-symmetrical, so that the grooves 120 of the two recessed portions strictly correspond, or they can be staggered, so that the grooves 120 of the two recessed portions can have a certain positional deviation in the circumferential direction of the seal 119, that is, the projections along the axial direction of the seal 119 may not overlap. During installation of the seal 119, either end of the seal 119 can be inserted into the gas-liquid exchange chamber 102 for installation, without specifying the end, thereby avoiding incorrect installation direction.

[0053] In the embodiments provided in this application, refer to Figure 5 As shown, a sealing ring 121 is formed on the outer wall surface of the sealing member 119. The sealing ring 121 is made of rubber and is offset from the recessed portion in the first direction D1. The sealing member 119 is interference-fitted into the gas-liquid exchange chamber 102 via the sealing ring 121. When the sealing member 119 is installed in the gas-liquid exchange chamber 102, the sealing ring 121 is compressed and deformed and fits tightly against the inner circumferential wall of the gas-liquid exchange chamber 102, thereby improving the sealing performance between the sealing member 119 and the gas-liquid exchange chamber 102. The sealing member 119 and the sealing ring 121 are integrally formed, and the sealing ring 121 can be provided as one or more. In this embodiment, two sealing rings 119 are provided.

[0054] like Figure 2 as well as Figure 4 As shown, the ink cartridge 100 is further provided with a sealing film 122, which is a sealing film. The sealing film 122 is a material with good sealing and adhesive properties. One side of the sealing film 122 is attached to the first wall 114, and the projections of the external interface 103, the air inlet 108 and the air guide channel 107 in the first direction D1 all fall on the sealing film 122 to seal the external interface 103, the air inlet 108 and the air guide channel 107 to prevent ink leakage from polluting the external environment. The sealing film 122 is attached to the first wall 114, thereby closing the external interface 103 of the gas-liquid exchange chamber 102, the sealing film 122 is attached to the second opening 116 of the air inlet 108, thereby closing the air inlet 108, and the sealing film 122 is attached to the first opening 115 of the air guide channel 107, thereby closing the air guide channel 107.

[0055] Reference Figure 3 as well as Figure 7As shown, a secondary ink storage chamber 105 is further provided in the ink cartridge body 101. The volume of the secondary ink storage chamber 105 is smaller than that of the primary ink storage chamber 104. A small amount of ink is pre-stored in the secondary ink storage chamber 105. Unlike the primary ink storage chamber 104, the secondary ink storage chamber 105 is provided with only a secondary liquid inlet 112 connected to the gas-liquid exchange chamber 102. The secondary ink storage chamber 105 is not connected to the air guide chamber 106 and does not exchange gas with the air guide chamber 106. 2 generates negative pressure, and the existence of negative pressure prevents the ink in the secondary ink storage chamber 105 from flowing out, so that there is always ink in the secondary ink storage chamber 105. The air pressure of the printer to absorb ink is relatively fixed. If no ink continues to flow into the ink supply needle 202 for a period of time, an alarm will be triggered. At this time, since there is ink in the secondary ink storage chamber 105, the ink supply needle 202 will not inhale air, which is equivalent to providing a liquid seal for the ink supply needle 202, which can effectively prevent the print head from spraying empty sprays.

[0056] In the embodiments provided in this application, refer to Figure 3 、 Figure 6 as well as Figure 7 As shown, a buffer chamber 123 is provided between the ink storage chamber 104 and the air guiding chamber 106, and the buffer chamber 123 is respectively connected to the main ink storage chamber 104 and the air guiding chamber 106. Specifically, the buffer chamber 123 is formed with an air outlet 109 on the inner wall surface of the air guiding chamber 106, and the buffer chamber 123 is connected with the air guiding chamber 106 through the air outlet 109; the first end of the main ink storage chamber 104 is formed with a connecting port 110 on the inner wall surface of the buffer chamber 123, and the main ink storage chamber 104 is connected with the buffer chamber 123 through the connecting port 110.

[0057] The buffer chamber 123 is used to prevent the air guide chamber 106 from being directly connected to the main ink storage chamber 104 to prevent ink from entering the air guide chamber 106. As the ink stored in the main ink storage chamber 104 is replenished and enters the ink cartridge body 101, negative pressure will be generated in the main ink storage chamber 104 due to the ink transfer. The outside air will enter the buffer chamber 123 through the air inlet 108, the air guide channel 107, the air guide chamber 106 and the air outlet 109 in turn, and then enter the main ink storage chamber 104 through the connecting port 110. The main ink storage chamber 104 is connected to the outside atmosphere, so the air pressure balance of the main ink storage chamber 104 can be well maintained, ensuring the normal outflow of ink from the main ink storage chamber 104.

[0058] In a feasible implementation, referring to Figure 3 as well as Figure 7As shown, the air outlet 109 is arranged near the second surface 1012, and the communication port 110 is arranged near the first surface 1011. After the ink cartridge body 101 is installed on the mounting portion 201, the second surface 1012 is located above the first surface 1011 in the direction of gravity, and the air outlet 109 is located above the communication port 110 to prevent the ink in the buffer cavity 123 from flowing into the air outlet 109 and causing leakage. At the same time, the air outlet 109 is arranged near the second surface 1012, and the air inlet 108 is close to the first surface. The two are far apart, so that the length of the air guide channel 107 can be extended. Further, referring to Figure 3 As shown, a leak-proof member 117 is provided in the buffer cavity 123. The leak-proof member 117 is used to limit the ink in the main ink storage cavity 104 from flowing into the buffer cavity 123 through the connecting port 110. The leak-proof member 117 is located at the connecting port 110, that is, it is arranged close to the second surface 1012, and will not block the air outlet 109. Therefore, it can prevent the ink in the main ink storage cavity 104 from entering the buffer cavity 123 while avoiding blocking the air flow path and reducing the water flow rate of the ink flow path.

[0059] Preferably, the leak-proof member 117 is a sponge, which is used to control pressure and prevent leaks. The sponge has densely distributed fine pores inside. On the one hand, the ink in the main ink storage chamber 104 enters the sponge from the connecting port 110. The sponge can store ink, and the flow range of the ink is limited by the sponge, thereby preventing the ink from flowing into the buffer chamber 123; on the other hand, the air pressure change inside the ink cartridge body 101 will affect the permeability of the sponge. The outside air enters the air guide chamber 106 from the air guide channel 107, passes through the air outlet 109, and then enters the buffer chamber 123 where the sponge is set. It passes through the fine pores in the sponge and the connecting port 110 to enter the main ink storage chamber 104, thereby completing the gas exchange.

[0060] Reference Figure 2 as well as Figure 6 As shown, the main ink storage chamber 104 includes a first sub-chamber 1041 and a second sub-chamber 1042 that are connected to each other. The buffer chamber 123, the air guide chamber 106 and the secondary ink storage chamber 105 are all formed in the first block 125. A preset gap is formed between the first block 125 and the inner wall of the main ink storage chamber 104. The first sub-chamber 1041 and the second sub-chamber 1042 are located on opposite sides of the first block 125 along the second direction D2. The first sub-chamber 1041 and the second sub-chamber 1042 are connected through the preset gap. The connecting port 110 is arranged on the inner wall surface of the first sub-chamber 1041, and the main liquid inlet 111 is arranged on the inner wall surface of the second sub-chamber 1042. The above structural design can make the main ink storage chamber 104 have a larger volume and can store more ink.

[0061] Further, refer to Figure 6As shown, a plurality of partitions 124 are arranged between the first block 125 and the inner wall surface of the ink cartridge body 101, and each partition 124 can be vertically or obliquely arranged between the first block 125 and the inner wall surface of the ink cartridge body 101, and the partitions 124 can strengthen the structural strength of the ink cartridge body 101.

[0062] With reference to Figure 3 And Figure 6 As shown, the main ink storage cavity 104 is provided with a filter 118, and the filter 118 is arranged on the main liquid inlet 111, and in the embodiments provided in the present application, the filter 118 is a filter screen, which is used to filter the passing ink, remove the particulate impurities or emulsified ink in the ink, so as to ensure that the clean ink flows to the print head, and effectively reduce the air mixed in the ink during the ink adding process, thereby reducing the generation of bubbles during the printing process, and achieving the purpose of improving the printing effect.

[0063] The above embodiments according to the drawings explain the structure, features and effects of the present application in detail, and the above description is only the preferred embodiments of the present application, but the present application is not limited to the embodiments shown in the drawings, any changes or modifications made according to the concept of the present application, or equivalent embodiments with equivalent changes, shall be within the scope of protection of the present application.

Claims

1. An ink cartridge, installable in a mounting portion of a printing device along a first direction, the ink cartridge comprising: An ink cartridge body, wherein a gas-liquid exchange chamber, a main ink storage chamber, and an air guide chamber are provided in the ink cartridge body, the main ink storage chamber is connected to the air guide chamber, the gas-liquid exchange chamber forms an external interface on the outer wall surface of the ink cartridge body, an air inlet and a main liquid inlet are provided on the inner wall surface of the gas-liquid exchange chamber, the air guide chamber is connected to the gas inlet via an air guide channel, and the main ink storage chamber is connected to the main liquid inlet; a sealing member disposed in the gas-liquid exchange chamber, wherein the gas inlet and the main liquid inlet are located on opposite sides of the sealing member, and the gas inlet is closer to the external interface than the sealing member; Its characteristics are: The external port has a first end and a second end, the first end is farther away from the sealing member than the second end, the air inlet is disposed proximate to the first end, a projection of the air inlet in a second direction is misaligned with the sealing member or partially falls on the sealing member, and the second direction is orthogonal to the first direction; The ink cartridge body has a first surface, a protrusion is formed on the first surface, the protrusion forms a first wall on a side facing away from the first surface, the gas-liquid exchange chamber is at least partially formed in the protrusion, the gas-liquid exchange chamber extends through the first wall to form the external interface, and the first end is farther away from the first surface than the second end; A preset angle is formed between the first wall surface and the second direction, and the preset angle is ≥5°.

2. The ink cartridge according to claim 1, wherein: The air guide channel penetrates the first wall surface to form a first opening, the air inlet penetrates the first wall surface to form a second opening, and the first opening is continuous with the second opening.

3. The ink cartridge according to claim 1, wherein: A recessed portion is formed on a side of the sealing member facing the external interface, and a projection of the recessed portion in the second direction at least partially overlaps with the air inlet, so that the air inlet can be connected to the external interface through the recessed portion.

4. The ink cartridge according to claim 3, wherein: The recessed portion includes at least one groove, and the groove extends along the radial direction of the sealing component to penetrate the outer wall surface of the sealing component.

5. The ink cartridge according to claim 4, wherein: There are a plurality of grooves, and the plurality of grooves are arranged in an annular manner with the axis of the sealing member as the center line.

6. The ink cartridge according to claim 3, wherein: There are two recessed portions, and the two recessed portions are symmetrically arranged at opposite ends of the sealing member along the axial direction of the sealing member.

7. The ink cartridge according to claim 3, wherein: A sealing ring is formed on the outer wall surface of the sealing member. The sealing ring and the recessed portion are staggered in the first direction. The sealing member is interference-fitted in the gas-liquid exchange cavity through the sealing ring.

8. The ink cartridge according to claim 1, wherein: The ink cartridge is further provided with a sealing film, which is attached to the first wall surface, and the projections of the external interface, the air inlet and the air guide channel in the first direction all fall on the sealing film.

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