Ink box

Abstract

The utility model discloses an ink box for supplying ink to ink-jet printing equipment. The ink box comprises a shell, an ink storage cavity for storing ink and an ink supply part communicated with the ink storage cavity are arranged in the shell, an air inlet is formed in the upper side of the shell, a connecting rod mechanism is arranged on the upper side of the shell, and the sealing piece is arranged at one end of the connecting rod mechanism. The other end of the connecting rod mechanism is pressed to move downwards, and meanwhile the sealing piece is lifted to open the air inlet. The utility model has the advantages of simple structure and low production cost.

Description

Technical Field

[0001] The utility model belongs to the field of inkjet printing, and in particular relates to an ink box used for supplying ink to an inkjet printing device. Background Art

[0002] An inkjet printer is a device that sprays ink onto a print medium such as paper for recording. The ink is generally provided by an ink storage device that is detachably mounted to the inkjet printer. When the ink in the ink storage device is used up, a new ink storage device is replaced. The ink cartridge is generally provided with an air inlet. When the ink in the ink cartridge is consumed, the outside air will enter the ink cartridge through the air inlet to ensure the normal supply of ink. However, the existing ink cartridges generally seal the air inlet by attaching a sealing film. When using, the sealing film needs to be torn off first, which is inconvenient for users.

[0003] Japanese patent JP2023045953A discloses an ink cartridge installed in an ink cartridge holder of an inkjet printing device. The ink cartridge has an ink storage cavity for storing ink, which is connected to the ink storage cavity and arranged on the front side of the ink cartridge along the installation direction for supplying ink to the ink supply part of the inkjet printing device, and the air inlet is arranged on the upper side of the ink cartridge. A valve structure for opening or closing the air inlet is provided at the air inlet. When the ink cartridge is loaded into the ink cartridge holder, the valve structure opens the air inlet. When the ink cartridge is removed from the ink cartridge holder, the valve structure closes the air inlet. The valve structure is complex and has many parts, which is not easy to assemble, and thus the production cost is high. Summary of the invention

[0004] In view of the problems existing in the prior art, the main purpose of the utility model is to provide an ink cartridge with a simple structure and low production cost.

[0005] In order to achieve the above-mentioned main purpose, the utility model provides an ink cartridge for supplying ink to an inkjet printing device, the inkjet printing device having an ink cartridge holder, the ink cartridge being loaded into the ink cartridge holder along an installation direction, the ink cartridge comprising a shell, an ink storage chamber for storing ink being arranged in the shell, an ink supply portion being arranged at the front side of the shell along the installation direction and being communicated with the ink storage chamber, an air inlet being arranged at the upper side of the shell, the air inlet being arranged with a sealing member, and during the process of installing the ink cartridge into the ink cartridge holder, the sealing member moves from a sealing position for sealing the air inlet to an opening position for opening the air inlet; a connecting rod mechanism is arranged at the upper side of the shell, the sealing member is arranged at one end of the connecting rod mechanism, and when the ink cartridge is installed in the ink cartridge holder, the other end of the connecting rod mechanism is pressed and moved downward, and at the same time, the sealing member is lifted to open the air inlet.

[0006] It can be seen that the ink cartridge provided by the utility model has a relatively simple sealing structure for the air inlet, which is opened only when the ink cartridge is installed in the ink cartridge holder. No additional manual operation is required by the user, and the use is convenient.

[0007] Furthermore, along the installation direction when the ink cartridge is installed into the ink cartridge holder, an ink extraction needle is provided on the front side of the ink cartridge holder, and a pushing portion for cooperating with the ink cartridge to open the air inlet of the ink cartridge is provided on the upper side. Along the installation direction, the pushing portion has an inclined surface inclined forward and downward, a plane, and an inclined surface and a plane inclined forward and upward.

[0008] Furthermore, the shell also includes a fixed seat, and a connecting rod structure is arranged on the fixed seat; the connecting rod structure includes a valve stem, a connecting rod and a cross rod, the valve stem is provided with a sealing member for sealing the air inlet, the connecting rod is rotatably connected to the valve stem, and the cross rod is fixedly arranged on the fixed seat.

[0009] Furthermore, the top of the valve stem is lower than the plane or flush with it.

[0010] Furthermore, one end of the connecting rod is connected to the valve stem, a waist-shaped hole is provided in the middle for the cross rod to pass through, and the other end is a free end.

[0011] Furthermore, the connecting rod mechanism also includes an elastic member that applies elastic force to the valve stem, so that it has a tendency to keep the air inlet closed.

[0012] Furthermore, a limiting member is arranged on the top wall of the shell.

[0013] In order to more clearly illustrate the above-mentioned objectives, technical solutions and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the structure of an ink cartridge holder of an inkjet printing device;

[0015] Figure 2 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0016] Figure 3 This is a schematic diagram of the structure of Example 1 of the utility model after removing the left side housing;

[0017] Figure 4 is a schematic diagram of the structure of the embodiment 1 of the utility model when it is installed on the ink cartridge holder, at which time the puncture needle begins to contact the pushing portion and moves downward;

[0018] Figure 5 is a schematic diagram of the structure of the embodiment 1 of the utility model when it is installed in the ink cartridge holder, at which time the puncture needle moves downward to the lowest position;

[0019] Figure 6 This utility model embodiment 1 Figure 5 A partial structural schematic diagram showing the positional relationship between the puncture device and the sealing film when the puncture device is in the position shown;

[0020] Figure 7 This is a schematic diagram of the structure of the utility model when the first embodiment is installed;

[0021] Figure 8 This utility model embodiment 1 Figure 7 A partial structural schematic diagram showing the positional relationship between the puncture device and the sealing film when the puncture device is in the position shown;

[0022] Fig. 9 It is a structural schematic diagram of Embodiment 2 of the present utility model;

[0023] Fig.10 This is a schematic diagram of the structure of Example 2 of the utility model after removing the left side housing;

[0024] Fig.11 yes Fig.10 Schematic diagram of the structure from the top view;

[0025] Fig.12 It is a schematic diagram of the structure of the embodiment 2 of the utility model from the top view after the left side housing is removed, and at this time, the abutment member is in a retracted state;

[0026] Fig.13 It is a structural schematic diagram of implementation 3 of the utility model;

[0027] Fig.14 It is a schematic diagram of the structure of the embodiment 3 of the utility model when it is installed on the ink cartridge holder, at which time the valve stem has not yet contacted the pushing portion;

[0028] Fig.15 Embodiment 3 of the present utility model Fig.14 When the valve is in the position shown, a partial structural diagram showing the valve structure position is shown;

[0029] Fig.16 This is a schematic diagram of the structure of the embodiment 3 of the utility model when it is installed in the ink cartridge holder, at which time the ink cartridge installation is complete;

[0030] Fig.17 Embodiment 3 of the present utility model Fig.16 When the valve is in the position shown, a partial structural diagram showing the valve structure position is shown;

[0031] Fig.18 It is a structural schematic diagram of Embodiment 4 of the present utility model;

[0032] Fig.19It is a schematic diagram of the structure of the fourth embodiment of the utility model when it is installed on the ink cartridge holder, at which time the connecting member begins to abut against the pushing portion;

[0033] Fig. 20 Embodiment 4 of the present utility model Fig.19 When the valve is in the position shown, a partial structural diagram showing the valve structure position is shown;

[0034] Fig.21 It is a schematic diagram of the structure of the embodiment 4 of the utility model when it is installed in the ink cartridge holder, at which time the ink cartridge installation is completed;

[0035] Fig. 22 Embodiment 4 of the present utility model Fig.21 When the valve is in the position shown, a partial structural diagram showing the valve structure position is shown;

[0036] Fig.23 It is a structural schematic diagram of Embodiment 5 of the present utility model;

[0037] Fig.24 This is a schematic diagram of the structure of Example 5 of the utility model after removing the left side housing;

[0038] Fig.25 It is a schematic diagram of the structure of Example 5 of the utility model after the left side shell is removed. At this time, the ink cartridge has been installed in the ink cartridge holder and the machine compartment door has been closed. DETAILED DESCRIPTION

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but it is easy for those skilled in the art to understand that the present invention can also be implemented in other ways different from those described herein. Therefore, other possible implementation methods that can be known by those skilled in the art based on the embodiments described in this application all belong to the protection scope of this application.

[0040] The specific structure of the embodiment of the utility model is described in detail below according to the accompanying drawings. It can be understood that the embodiment of the utility model includes but is not limited to the illustrated structure, and those skilled in the art can make corresponding adjustments and improvements to its structure according to actual conditions.

[0041] The embodiment of the utility model needs to be installed in the ink cartridge holder of the inkjet printing device when in use. The structure of the ink cartridge holder is briefly described first. Figure 1 As shown, along the installation direction A when the ink cartridge is installed into the ink cartridge holder, an ink extraction needle 91 is provided on the front side of the ink cartridge holder, and a pushing portion for cooperating with the ink cartridge to open the air inlet of the ink cartridge is provided on the upper side. Along the installation direction A, the pushing portion has an inclined surface 92 inclined forward and downward, a plane 93, an inclined surface 94 inclined forward and upward, and a plane 95.

[0042] Example 1

[0043] like Figure 2 and Figure 3 As shown, the ink cartridge 100 includes a housing 110, which can be formed by connecting shells 111 and 112 to each other, and an ink storage chamber 113 for storing ink is formed inside. Along the installation direction A, the front side of the housing 110 has an ink supply portion 120, wherein the connection between the two shells can be any one of a splicing connection, a lap connection, a spot welding connection or a hot melt connection. In other embodiments, the housing 110 can be formed by connecting the housing and the cover, or by welding the housing to a sealing film, etc.

[0044] The air inlet is arranged on the upper side of the housing 110, on the top wall of the shell 111, and a sealing film 131 for sealing the air inlet and a piercing device 130 for piercing the sealing film are arranged above the air inlet. The piercing device 130 is arranged in the installation space formed by the top wall of the shell 111 and the top wall of the shell 112, and includes a piercing needle and a spring 133. The piercing needle includes an abutting portion 1321 at the upper end, a needle head 1322 and a connecting portion 1323. The lower end of the spring 133 abuts against the sealing film 131, and the upper end abuts against the connecting portion 1323 of the piercing needle 132, and is sleeved on the outer side of the needle head 1322 to apply an upward elastic force to the piercing needle so that the needle head 1322 is away from the sealing film 131. The shell 111 is provided with a guide portion 1111 for limiting and guiding the piercing needle, and the connecting portion 1323 is provided with a guided surface, which can slide along the outer side of the guide portion 1111. Under the elastic force of the spring 133 , the top surface of the connecting portion 1323 abuts against the lower surface of the top wall of the housing 112 , and the abutting portion 1321 extends out from the opening of the top wall of the housing 112 .

[0045] Figures 4 to 8 FIG. 2 shows the process of installing the ink cartridge 100 into the ink cartridge holder. Figure 4 As shown, the ink cartridge 100 is installed toward the ink cartridge holder along the installation direction A until the abutment portion 1321 of the puncture needle abuts against the inclined surface 92 of the pushing portion. As the ink cartridge is further installed forward, the abutment portion 1321 is pushed downward by the inclined surface to overcome the elastic force of the spring 133 and move downward, and the needle head 1322 moves downward to puncture the sealing film 131. At this time, a seal is formed between the sealing film 131 and the needle head 1322, and the air inlet 1112 has not been opened yet. Figure 6 The ink cartridge 100 is further installed forward, the ink needle 91 is connected to the ink supply portion 120, and the abutment portion 1321 slides along the plane 93, as shown in FIG. Figure 5As shown, at this time, the needle head 1322 remains in a state of piercing the sealing film 131 but forming a seal with the sealing film 131, and the ink extraction needle 91 is in fluid communication with the ink supply portion 120. Then, as the ink cartridge 100 moves forward, the abutment portion 1321 slides along the inclined surface 94 of the pushing portion to the plane 95, and the elastic force of the spring 133 causes the piercing needle to move upward, and the needle head 1322 is separated from the sealing film 131 to open the air inlet 1112, and the ink cartridge 100 is installed in place, as shown in FIG. Figure 7 and Figure 8 shown.

[0046] In this embodiment, no valve structure is provided at the air inlet. By providing a sealing film at the air inlet and providing a puncturing device on the ink cartridge that cooperates with the pushing portion of the ink cartridge holder, the air inlet can be opened at a desired time. The ink cartridge has a simple structure and low cost. In other embodiments, the puncturing device may be different from that in this embodiment, as long as it can cooperate with the ink cartridge holder to open the air inlet during the installation of the ink cartridge. The positioning of the puncturing needle and the housing may also be in other appropriate ways, and the spring may also be replaced by other elastic structures.

[0047] Example 2

[0048] like Fig. 9 As shown, the ink cartridge 200 includes a housing 210, which can be formed by connecting shells 211 and 212 to each other, and an ink storage cavity for storing ink is formed inside. Along the installation direction A, the front side of the housing has an ink supply portion 220, wherein the connection between the two shells can be any one of a splicing connection, a lap connection, a spot welding connection or a hot melt connection. The air inlet is arranged on the top wall of the shell 211, and the top wall of the shell 211 and the top wall of the shell 212 form an installation space, and a valve structure 230 for opening and closing the air inlet is arranged above the air inlet in the installation space.

[0049] like Fig.10 and Fig.11As shown, the valve structure 230 is arranged in the installation space at the top of the ink cartridge 200, including a follower 231 with a sealing member 2311 at the bottom, an abutment member 232 that can drive the follower 231 to move upward to open the air inlet, and a spring 233 arranged on the front and rear sides of the follower 231 to apply a downward elastic force to the follower 231 so that the sealing member 2311 seals the air inlet. Among them, the abutment member 232 is arranged on both sides of the follower 231 and can move between an open position and a retracted position. The abutment member 232 includes a slider 2321 protruding from the opening to the outside of the housing 210 and having an inclined surface, and a slider 2322 fixedly connected thereto and having an inclined surface. The inclined surface of the slider 2321 is a vertical surface, and its inclination direction is gradually inclined outward along the installation direction A, and the inclined surface of the slider 2322 is inclined inward and downward and extends along the installation direction A. The follower 231 is provided with a sealing member 2311, two openings 2312 and a mounting portion 2313, wherein a slider 2322 of the abutment member 232 is inserted into the opening 2312, the lower end of the spring 233 is fixed on the mounting portion 2313, the upper end abuts against the shell 210, and its outer side is limited in position by a positioning portion 2111 provided on the top wall of the shell 211.

[0050] When the ink cartridge 200 is installed along the installation direction A to the ink cartridge holder until the ink needle 91 is connected to the ink supply portion 220, the inclined surface of the slider 2321 protruding outward abuts against the structure outside the ink cartridge. As the ink cartridge 200 is further installed, the inclined surface of the slider 2321 slides along the structure, pushing the sliders 2321 and 2322 to move inward, and the slider 2322 further extends into the opening 2312. The upper side of the opening 2312 slides along the inclined surface of the slider 2322, causing the follower 231 to overcome the elastic force of the spring 233 and move upward, thereby lifting the bottom seal 2311 and disengaging from the air inlet to open the air inlet, and the ink cartridge is further installed in place. At this time, the slider 2321 of the abutment is retracted to a position above the ink cartridge, as shown in FIG. Fig.12 shown.

[0051] When the ink cartridge 200 is taken out from the ink cartridge holder in a direction opposite to the installation direction, under the elastic force of the spring 233, the follower 231 moves downward, the slider 2322 slides outward along the inclined surface in the opening 2312 of the follower 231, and the slider 2321 also moves outward until the seal 2311 on the follower 231 seals the air inlet, the abutment 232 is in the open position, the ink extraction needle 91 is disconnected from the ink supply part, and the ink cartridge 200 can be removed from the ink cartridge holder.

[0052] In this embodiment, the valve structure 230 does not contact the pushing portion of the ink cartridge holder, and the air inlet is opened through the structures on the left and right sides of the ink cartridge. The valve structure 230 has a simple structure and low cost. In this embodiment, the sealing member can also be arranged below the air inlet, and when the abutting member moves to the retracted position, the driven member is pushed to move downward to open the air inlet.

[0053] Example 3

[0054] like Fig.13 As shown, the ink cartridge 300 includes a housing 310, which can be formed by connecting shells 311 and 312 to each other, and an ink storage cavity for storing ink is formed inside. Along the installation direction A, the front side of the housing 310 has an ink supply part 320, wherein the connection between the two shells can be any one of a splicing connection, a lap connection, a spot welding connection or a hot melt connection. The air inlet is arranged on the top wall of the housing 311, and the top wall of the housing 311 and the top wall of the housing 312 form an installation space, and a valve structure 330 for opening and closing the air inlet is arranged in the installation space.

[0055] like Fig.15 As shown, the valve structure 330 includes a sealing member 331 disposed below the air inlet, a valve stem passing through the air inlet and fixing the sealing member 331, a sealing member 331 is disposed at the bottom of the valve stem, a contact portion 3322 is disposed at the top, a limiting portion 3321 is disposed in the middle, a spring 333 is disposed on the outer sleeve of the valve stem, an upper end of the spring 333 contacts the limiting portion 3321, and a lower end contacts the top wall of the housing 311, the spring 333 pushes the limiting portion to contact the lower side surface of the top wall of the housing 312, and the contact portion 3322 extends from the opening of the top wall of the housing 312, Fig.13 .

[0056] When the ink cartridge 300 is installed in the ink cartridge holder along the installation direction A, when the ink extraction needle 91 is not connected to the ink supply portion 320, there is a gap between the abutment portion 3222 of the valve stem and the inclined surface 92, such as Fig.14 As shown, the valve structure is in Fig.15 As the ink cartridge 300 is further installed, the ink needle 91 extends into the ink supply portion 320 and forms a connection, the abutment portion 3222 abuts against the inclined surface 92 and slides along the inclined surface 92 until the abutment portion 3222 abuts against the flat surface 93, and the valve stem overcomes the elastic force of the spring 333 and drives the sealing member 331 to move downward, thereby opening the air inlet 3112, as shown in FIG. Fig.16 and Fig.17 As shown, the installation of the ink cartridge 300 is completed.

[0057] When the ink cartridge 300 is taken out from the ink cartridge holder in a direction opposite to the installation direction, the abutment portion 3222 slides along the inclined surface 92, the valve stem moves upward under the action of the spring 333, and the seal 331 seals the air inlet 3112, the ink extraction needle 91 is disconnected from the ink supply portion 320, and the ink cartridge 300 can be removed from the ink cartridge holder.

[0058] In this embodiment, the valve structure is simple, and the seal 331 is arranged below the air inlet 3112, so that the air inlet can be opened by moving the valve stem downward, so that the valve stem does not need to move upward during the installation of the ink cartridge 300. Compared with the first embodiment, the air inlet is located at the rear, so that the valve stem does not move to the position in contact with the inclined surface 94 and the plane 95.

[0059] Example 4

[0060] like Fig.18 As shown, the ink cartridge 400 includes a housing 410, which can be formed by connecting shells 411 and 412 to each other, and an ink storage cavity for storing ink is formed inside. Along the installation direction A, the front side of the housing has an ink supply part 420, wherein the connection between the two shells can be any one of a splicing connection, a lap connection, a spot welding connection or a hot melt connection. The air inlet is arranged on the top wall of the shell 411, and a valve structure 430 for opening and closing the air inlet is arranged above the air inlet.

[0061] like Fig. 20 As shown, the valve structure 430 includes a valve stem 432 with a seal 431 at the bottom, a connecting rod 433 rotatably connected to the valve stem 432, a cross bar 4341 fixed to a fixed seat 434, and a limiter 4111 is also provided on the top wall of the housing 410. The valve stem 432, the connecting rod 433 and the cross bar 4341 form a connecting rod mechanism. One end of the connecting rod 433 is connected to the valve stem 432, and a waist-shaped hole 4331 is provided in the middle for the cross bar 4341 to pass through, and the other end is a free end, tilted upward.

[0062] When the ink cartridge 400 is installed in the ink cartridge holder along the installation direction A, the top of the valve stem 432 is slightly lower than the plane 93 or flush with it, so that the valve stem does not contact or contacts the pushing portion of the ink cartridge holder without forming abutment. After the ink extraction needle 91 is connected to the ink supply portion 320, the connecting rod 433 abuts against the connecting line between the inclined surface 92 of the pushing portion and the plane 93, as shown in FIG. Fig.19As the ink cartridge 400 is further installed forward, the free end of the connecting rod 433 slides along the connecting line and moves downward, and the cross bar 4341 slides in the waist-shaped hole 4331, and at the same time, the end of the connecting rod 433 connected to the valve stem 432 moves upward, thereby driving the valve stem 432 to move upward, and the sealing member 431 is lifted upward to open the air inlet 4112. At this time, the valve stem 432 moves to a position below the plane 95 and extends upward, and its top surface height exceeds the height of the plane 93. The installation of the ink cartridge 400 is completed, as shown in FIG. Fig.21 and Fig. 22 shown.

[0063] When the ink cartridge 400 is taken out from the ink cartridge holder in a direction opposite to the installation direction, the valve stem moves backward until it abuts against the inclined surface 94 and is pushed downward by the inclined surface 94 to a position where the seal 431 closes the air inlet, and the cross bar 4341 slides in the waist-shaped hole 4331 and causes the free end of the connecting rod 433 to tilt upward, so that the ink extraction needle 91 is disengaged from the ink supply portion 420, and the valve stem further moves backward along the plane 93, and the ink cartridge 400 can be removed from the ink cartridge holder.

[0064] In this embodiment, no elastic member is used to apply elastic force, and a lever-like connecting rod mechanism is used to make the valve stem drive the sealing member to move up and down to open or close the air inlet. In other embodiments, an elastic member may also be provided to apply elastic force to the valve stem so that it has a tendency to keep the air inlet closed.

[0065] Example 5

[0066] like Fig.23 As shown, the ink cartridge 50 includes a housing 510, which can be formed by connecting shells 511 and 512 to each other, and an ink storage cavity for storing ink is formed inside. Along the installation direction A, the front side of the housing has an ink supply portion 520, wherein the connection between the two shells can be any one of a splicing connection, a lap connection, a spot welding connection or a hot melt connection. The air inlet is arranged on the rear side wall of the housing 510, and a valve structure 530 for opening and closing the air inlet is arranged at the air inlet.

[0067] like Fig.23 and Fig.24 As shown, the valve structure 530 includes a sealing member 531 arranged on the inner side of the air inlet, a valve stem 532 passing through the air inlet and fixing the sealing member 531, the valve stem extends backward from the side wall of the shell 510 to form an abutment portion, a limiting portion 5321 is arranged in the middle of the valve stem, and a spring 533 is arranged on the outer sleeve of the valve stem, the front end of the spring 533 abuts against the side wall of the shell 511, and the rear end abuts against the limiting portion 5321, the spring 333 pushes the limiting portion 5321 to abut against the shells 511 and 512 and enables the sealing member to seal the air inlet.

[0068] When the ink cartridge 500 is installed in the ink cartridge holder along the installation direction A, the valve structure does not move. After the ink needle 91 is connected to the ink supply portion 320 and installed in place, when the machine door of the inkjet printing device is closed, the machine door abuts against the abutting portion of the valve stem 532 and pushes the valve stem 532 to move forward, and the sealing member 531 opens the air inlet 5112. At this time, the installation of the ink cartridge 500 is completed. Fig.25 shown.

[0069] When the ink cartridge 500 is removed from the ink cartridge holder, as the machine compartment door is opened, the valve stem 532 moves backward under the action of the spring 533, the seal 531 seals the air inlet 5112, and then the ink cartridge 500 is removed in the direction opposite to the installation direction A.

[0070] The valve structure in this embodiment is similar to the valve structure in Example 3, and the sealing members are all arranged inside the ink cartridge, but the valve stem does not contact the pushing portion of the ink cartridge holder, but relies on the opening and closing of the machine compartment door to achieve the closing and opening of the air inlet.

[0071] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the scope of the present invention. Any person skilled in the art can make some improvements without departing from the scope of the present invention, that is, any changes or improvements made according to the present invention should be covered by the protection scope of the present invention.

Claims

1. An ink cartridge for supplying ink to an inkjet printing device, the inkjet printing device having an ink cartridge holder, the ink cartridge being loaded into the ink cartridge holder along an installation direction, the ink cartridge comprising a housing, an ink storage cavity for storing ink being provided in the housing, an ink supply portion being provided at a front side of the housing along the installation direction and being communicated with the ink storage cavity, characterized in that: An air inlet is provided on the upper side of the housing, and a sealing member is provided on the air inlet. During the process of installing the ink cartridge into the ink cartridge holder, the sealing member moves from a sealing position for sealing the air inlet to an opening position for opening the air inlet. A connecting rod mechanism is provided on the upper side of the shell, and the sealing member is provided at one end of the connecting rod mechanism. When the ink cartridge is installed to the ink cartridge holder, the other end of the connecting rod mechanism is pressed and moves downward, and at the same time, the sealing member is lifted to open the air inlet.

2. The ink cartridge according to claim 1, wherein: Along the installation direction when the ink cartridge is installed into the ink cartridge holder, the ink cartridge holder is provided with an ink extraction needle on the front side, and a pushing portion for cooperating with the ink cartridge to open the air inlet of the ink cartridge is provided on the upper side. Along the installation direction, the pushing portion has an inclined surface inclined forward and downward, a plane, and an inclined surface and a plane inclined forward and upward.

3. The ink cartridge according to claim 2, wherein: The housing further comprises a fixing seat, and the connecting rod structure is arranged on the fixing seat; The connecting rod structure comprises a valve stem, a connecting rod and a cross rod. The valve stem is provided with a sealing member for sealing the air inlet. The connecting rod is rotatably connected to the valve stem, and the cross rod is fixedly arranged on a fixing seat.

4. The ink cartridge according to claim 3, wherein: The top of the valve stem is below the plane or flush with it.

5. The ink cartridge according to claim 3, wherein: One end of the connecting rod is connected to the valve stem, a waist-shaped hole is provided in the middle for the cross rod to pass through, and the other end is a free end.

6. The ink cartridge according to claim 1, wherein: The connecting rod mechanism also includes an elastic member that applies elastic force to the valve stem, so that the valve stem has a tendency to keep the air inlet closed.

7. The ink cartridge according to claim 1, wherein: A limiting member is also arranged on the top wall of the shell.

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