PROTECTIVE CASE FOR INK CARTRIDGE AND INK CARTRIDGE PACKAGING

Abstract

A protective housing (10) for an ink cartridge (20), the ink cartridge (20) comprising a cartridge body (21) and a print head (22), and the print head (22) protruding from a partial region of a lower surface of the cartridge body (21), characterized in that the protective housing (10) comprises a housing piece (100) and a support piece (200) connected to the housing piece (100), the housing piece (100) being provided with a first housing space (110) configured to house the cartridge body (21) and a second housing space (120) configured to house the print head (22), and the first housing space (110) being in communication with the second housing space (120); The support piece (200) extends in the height direction (H) of the ink cartridge (20) and is arranged adjacent to the second housing space (120) so that other regions of the lower surface of the cartridge body (201) bear against it; and at least a portion of a lower edge (211) of the support piece (200) is flush with a lower edge of the second housing space (121); and in the height direction (H) of the ink cartridge (20), the lower edge of the second housing space (121) is lower than an end surface of the printhead (22).

Description

PROTECTIVE CASE FOR INK CARTRIDGE AND CARTRIDGE PACKAGING INK CROSS REFERENCE TO RELATED APPLICATIONS This application claims priority rights to Chinese patent application CN202520272510.8, filed on February 20, 2025. The contents of the Chinese patent application are incorporated herein by reference in their entirety. TECHNICAL FIELD This disclosure relates to a protective casing for an ink cartridge and ink cartridge packaging. BACKGROUND Among the ink cartridges used daily in the office, there is a type that contains a printhead. The ink in the cartridge forms images on the paper via the printhead, following the printer's instructions. The printhead is a high-precision component that must be protected during daily transport. Prior art document CN206749276U discloses a printhead for an ink cartridge. However, this printhead is cumbersome to handle, requires considerable effort to remove from the ink cartridge, and is costly. Another approach, as seen in prior art document CN219947661U, uses a packaging housing designed to accommodate an ink cartridge with a printhead.The overall shape of the housing conforms to the outer contour of the ink cartridge, and a recess is provided at one location of the printhead to protect it. However, when using these two types of protective housings, there is still a risk of the ink cartridge tipping over, which would compromise the protective effect. Furthermore, both solutions use plastic structures to protect the printhead, failing to meet environmental protection requirements. SUMMARY A technical problem to be solved by the present disclosure is to provide a protective housing for an ink cartridge and ink cartridge packaging in order to overcome the prior art defect that the protection is affected by tilting the ink cartridge. This disclosure resolves the above technical problem through the following technical solutions. A protective housing is provided for an ink cartridge. The ink cartridge comprises a cartridge body and a printhead, the printhead protruding from a partial region of a lower surface of the cartridge body. The protective housing comprises a housing piece and a support piece connected to the housing piece. The housing piece has a first housing space configured to accommodate the cartridge body and a second housing space configured to accommodate the printhead, the first housing space communicating with the second housing space. The support piece extends in the direction of the ink cartridge height and is arranged adjacent to the second housing space so that other regions of the lower surface of the cartridge body rest against it.and at least a portion of a lower edge of the support piece is flush with a lower edge of the second housing space; and in the direction of the ink cartridge height, the lower edge of the second housing space is lower than an end surface of the printhead. In this solution, the support piece supports the other regions of the lower surface of the cartridge body, except for the printhead, in the direction of the ink cartridge height. At least part of the lower edge of the support piece is flush with the lower edge of the second housing space, so that the protective housing can provide support both in the printhead region and in the other regions of the ink cartridge, preventing the ink cartridge from tilting. Furthermore, the lower edge of the second housing space is lower than the end surface of the printhead, thus providing a gap between the printhead and the lower edge of the protective housing, thereby protecting the printhead. Preferably, the protective housing is formed by folding a sheet to form the housing piece and the support piece, and the support piece is formed by folding a partial structure of the sheet inwards in a direction close to the second housing space. In this solution, the protective casing is formed by folding the sheet, and the support piece can be formed by folding the partial structure of the sheet inwards, thus facilitating the manufacture and formation of the protective casing. Preferably, the sheet comprises a plurality of plates arranged in sequence, a head end plate located at one end of the head and a tail end plate located at one end of the tail, which are connectable to each other; at least one of the plurality of plates is provided with an inward-folding portion, and a cut is provided between the inward-folding portion and another portion of the plate. In this solution, after the printhead end plate and the tail end plate are connected, a closed housing space for an ink cartridge can be formed. The support piece can be formed using a partial structure of one or more plates as an inward-folding portion. Furthermore, on the plate with the inward-folding portion, a cut is provided between the inward-folding portion and the other portion, allowing the inward-folding portion to be folded inwards. Preferably, on the plate provided with the inwardly folding portion, the cut is provided in the plate in a position flush with the lower surface of the cartridge body. In this solution, the cut is flush with the bottom surface of the cartridge body, matching the height of the cartridge body's bottom surface. Furthermore, where no cut is provided in other areas, the inwardly folding portion is connected to the other portion of the plate, allowing for more reliable support of the support piece. Preferably, the sheet comprises a first plate, a second plate, a third plate, and a fourth plate arranged in sequence, and the first plate and the fourth plate are connectable to each other; each of the third and fourth plates is provided with the inward-folding portion, and the cut is provided between the inward-folding portion and another portion of each of the third and fourth plates. Preferably, a fold extending in the direction of the ink cartridge height is provided between two adjacent plates between the first plate, the second plate, the third plate and the fourth plate; and a fold extending in the direction of the ink cartridge height is provided between the inwardly folding portion and the corresponding other portion of the third plate and the fourth plate. Preferably, the sheet further comprises a connecting plate, and the connecting plate is located on one side of one of the end plates and is attached to the plate at the other end of the sheet. Preferably, the protective casing is formed by mold pressing. Preferably, a projection of the support piece on the lower surface of the cartridge body is L-shaped. Preferably, the protective casing is made of a paper material or a plastic material. In this solution, when the film is made of paper, it offers environmental advantages and further facilitates printing the required information on the surface of the protective casing, for example, printing local eco-labels according to the different sales regions. When the film is made of plastic, the plastic can be transparent, thus facilitating the observation of the ink cartridge, such as a portion of the ink cartridge surface bearing information about the cartridge. Preferably, the distance between the lower edge of the second housing space and the final surface of the print head ranges from 6 mm to 10 mm. Preferably, a perimeter dimension of a top edge on a top of the first housing space is smaller than a perimeter dimension of a tab on a top of the ink cartridge. In this solution, a top edge of the protective housing can help hold the tab on top of the ink cartridge, thereby improving the protective effect. Preferably, a slot is provided on the top of the housing piece, and the slot is configured to accommodate an ink cartridge locking structure. In this solution, the slot can support the ink cartridge's locking structure, thereby improving the protective effect of the protective housing. Preferably, the groove is recessed downwards from an upper edge of the housing piece. Preferably, the housing piece is provided with a window in a side wall of the first housing space, and a position of the window in the side wall is configured to be aligned with a component that carries ink cartridge identity information. In this solution, the window can expose the component that carries the ink cartridge's identity (ID) information, thus making it easier for a user to view the ink cartridge's identity (ID) information without removing the ink cartridge from its protective casing. Ink cartridge packaging is also provided. The ink cartridge packaging comprises the protective casing for an ink cartridge described above. Preferably, the ink cartridge packaging further comprises an outer packaging element, wherein at least one of the protective housings is provided in the outer packaging element, and the protective housing is configured to accommodate an ink cartridge. The positive and progressive effects of this disclosure are as follows. The support piece supports the other regions of the lower surface of the cartridge body, except the printhead, in the direction of the ink cartridge height. At least a portion of the lower edge of the support piece is flush with the lower edge of the second housing space, so that the protective housing can provide support both in the printhead region and in the other regions of the ink cartridge, preventing the ink cartridge from tilting. In addition, the lower edge of the second housing space is lower than the end surface of the printhead, thus providing a gap between the printhead and the lower edge of the protective housing, thereby protecting the printhead. BRIEF DESCRIPTION OF THE DRAWINGS FIG.1 is a schematic structural diagram of an ink cartridge; FIG.2 is a schematic structural diagram of a protective housing according to embodiment 1; FIG.3 is a schematic structural diagram of an ink cartridge packaging with an ink cartridge housed in a protective casing; FIG.4 is a sectional plan view of the ink cartridge packaging of FIG.3; FIG.5 is a sectional perspective view of the ink cartridge packaging of FIG. 3; FIG.6 is a bottom view of the ink cartridge packaging in FIG.3; FIG.7 is a schematic structural diagram of a sheet according to embodiment 1; FIG. 8 is another schematic structural diagram of the underside of a protective housing; FIG.9 is a schematic structural diagram of a protective housing according to embodiment 2; and FIG.10 is a schematic structural diagram of a protective housing according to embodiment 3. Reference Number Description: Protective housing 10, housing piece 100, first housing space 110, upper edge 111, second housing space 120, lower edge of the second housing space 121, slot 130, window 140, support piece 200, lower edge of the support piece 211, sheet 300, first plate 310, second plate 320, third plate 330, first inward-folding portion 331, fourth plate 340, second inward-folding portion 341, cut 350, connection plate 360, ink cartridge 20, cartridge body 21, other regions of the lower surface of the cartridge body 201, tab 202, locking structure 203, printhead 22, top cap 23, ink cartridge QR code 24, protective film 30, height direction H, length direction L, width direction W and distance D of the ink cartridge. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS This disclosure is further illustrated by the following realizations; however, these realizations should not be construed as limiting this disclosure. Implementation 1 An embodiment of the present disclosure provides a protective housing 10 for an ink cartridge 20. As shown in FIG. 1, the ink cartridge 20 comprises a cartridge body 21 and a printhead 22. In a height direction H of the ink cartridge 20, the printhead 22 protrudes from a partial region of a lower surface of the cartridge body 21 and is located on one side (a left side in a length direction L shown in FIG. 1) of the lower surface of the cartridge body 21, such that for the entire ink cartridge 20, an irregular structural shape is formed at the bottom of the ink cartridge. The convex portion is the region where the printhead 22 is located, and the other regions, excluding the printhead 22, form a concave structural shape. In general, the other regions of the lower surface of the cartridge body 20 are substantially a flat surface.As shown in FIG.4, a top cover 23 is further connected to a top portion of the cartridge body 21, and the top cover 23 is attached to the cartridge body 21 by welding or gluing. As shown in FIG. 2-6, the protective housing 10 comprises a housing piece 100 and a support piece 200 connected to the housing piece 100. The housing piece 100 is provided with a first housing space 110 configured to accommodate the cartridge body 21 and a second housing space 120 configured to accommodate the printhead 22. The first housing space 110 is in communication with the second housing space 120. The support piece 200 extends in the height direction H of the ink cartridge 20 and is arranged adjacent to the second housing space 120 so that other regions of the lower surface of the cartridge body 201 rest against it. At least a portion of a lower edge 211 of the support piece 200 is flush with a lower edge of the second housing space 121.In the height direction H of the ink cartridge 20, the lower edge of the second housing space 121 is lower than an end surface of the print head 22. In the directions shown in FIG. 2-6, the first housing space 110 is located above the second housing space 120. The first housing space 110 surrounds an outer side wall of the cartridge body 21. The depth of the first housing space 110 and the dimension of the cartridge body 21 in the height direction H of the ink cartridge 20 can be configured as required. In some cases, the depth of the first housing space 110 is greater than the dimension of the cartridge body 21 in the height direction H of the ink cartridge 20. In other cases, the depth of the first housing space is less than the dimension of the cartridge body in the height direction H of the ink cartridge. Preferably, as shown in FIG.3, 4 and 5, the depth of the first housing space 110 is substantially equal to the dimension of the cartridge body 21 in the height direction H of the ink cartridge 20. When the top of the cartridge body 21 is provided with a flange 202, the depth is slightly less than the dimension of the cartridge body 21 in the height direction H of the ink cartridge 20. As shown in FIG. 2-6, the second housing space 120 surrounds one outer side of the printhead 22, and the depth of the second housing space 120 is greater than the dimension of the printhead 22 in the height direction H of the ink cartridge 20, thus providing a distance D between the printhead 22 and the lower edge 121, thereby protecting the printhead 22. Furthermore, the distance D also acts as a cushion during transport or in the event of accidental drops. Even if the lower edge of the protective housing 10 is deformed, the distance D prevents damage to the printhead 22.The support piece 200 supports the other regions of the lower surface of the cartridge body 201, and at least a portion of the lower edge 211 of the support piece 200 is flush with the lower edge of the second housing space 121, so that the lower edge of the protective housing 10 can be stably positioned and the ink cartridge 20 can be suspended in the air. As shown in FIG. 4, preferably, the lower edge 211 of the support piece 200 is substantially flush with the lower edge of the second housing space 121. In other embodiments, the lower edge of the support piece 200 may also be partially higher than the lower edge of the second housing space 121. The structural form of the protective housing 10 for an ink cartridge 20, provided above, also facilitates manufacturing and forming. The protective housing 10 can be formed by folding a sheet 300 to form the housing piece 100 and the support piece 200. The support piece 200 is formed by folding a portion of the sheet 300 inward in a direction close to the second housing space 120. The 300 film is made of either paper or plastic. When made of paper, it offers environmental advantages—especially in light of plastic restriction policies in many countries—as well as economic benefits. Furthermore, it facilitates printing the required information on the surface of the protective casing 10, such as local eco-labels specific to different sales regions. When made of plastic, the plastic can be transparent, allowing the ink cartridge 20 to be visible, as part of its surface can display information about the ink cartridge. Sheet 300 comprises a plurality of plates arranged in sequence, where end plates located at opposite ends of sheet 300 are connectable to each other. At least one of the plurality of plates is provided with an inwardly folding portion, and a cut 350 is provided between the inwardly folding portion and another portion of the plate. The number of plates is related to the number of peripheral side walls of the ink cartridge 20. As a conventional form of ink cartridge 20, as shown in FIG. 1, the ink cartridge 20 is provided with four peripheral side walls. Accordingly, sheet 300 can comprise four main plates corresponding to the peripheral side walls of the ink cartridge 20. After the end plates are connected to each other, the enclosed housing space formed can be adapted to the structure of the ink cartridge 20.Sheet 300 may have an integral sheet structure, a fold between the plates may be provided, and a fold between the inward-folding portion and another portion of the plate may also be provided, except at the cut position 350, in order to facilitate folding sheet 300 to form the protective housing 10. When selecting one or more plates from the plurality of plates to configure the inward-folding portion, the selection can be made based on a positional relationship to the concave portion of the ink cartridge 20. The plates correspond to the concave portion in the height direction H and length direction L of the ink cartridge 20, or in the height direction H and width direction W of the ink cartridge 20. Furthermore, when the dimension of the inward-folding portion is defined on the corresponding plates, the dimension can also be defined with reference to the dimension of the concave portion of the ink cartridge 20. A 350 cut is provided between the inward-folding portion and the other portion, so that the inward-folding portion separates from the other portion at the 350 cut and folds inward.In this way, the support piece 200 formed by folding the folding portion inwards can abut against the other regions of the lower surface of the cartridge body 201, and the second housing space 120 can also be defined by folding the folding portion inwards. On the plate provided with the inward-folding portion, cutout 350 is provided in the plate in a position flush with the lower surface of the cartridge body 21. Cutout 350 is provided in a position flush with the lower surface of the cartridge body 21, which coincides with the height of the lower surface of the cartridge body 21. Likewise, when cutout 350 is not provided in other areas, the inward-folding portion is connected to the other portion of the plate, allowing for more reliable support of the support piece 200. As an example, the ink cartridge 20 is provided with four perimeter side walls. Figure 7 shows a structural form of the sheet 300. After the sheet 300 is closed and folded inwards, a protective housing 10, shown in Figure 2, can be formed. As shown in Figures 3-6, the protective housing can be arranged on an outer perimeter side of the ink cartridge 20 to protect it. The sheet 300 comprises a first plate 310, a second plate 320, a third plate 330, and a fourth plate 340, which are arranged sequentially. The first plate 310, located at the printhead end, and the fourth plate 340, located at the tail end, are connectable to each other. Each of the third plate 330 and the fourth plate 340 is provided with the inward-folding portion, i.e., a first inward-folding portion 331 and a second inward-folding portion 341.Cut 350 is provided between the first inward-folding portion 331 and another portion of the third plate 330, and between the second inward-folding portion 341 and another portion of the fourth plate 340. As shown in FIG. 3-5, both the first plate 310 and the third plate 330 are sized to fit the length of the ink cartridge 20, and both the second plate 320 and the fourth plate 340 are sized to fit the width of the ink cartridge 20. The cut 350 is provided between the first inward-folding portion 331 and the other portion of the third plate 330 only in a position flush with the lower surface of the ink cartridge 20, and the cut 350 is provided between the second inward-folding portion 341 and the other portion of the fourth plate 340 only in a position flush with the lower surface of the ink cartridge 20. The two cuts 350 are on the same line. As shown in FIG. 7, a fold extending in the height direction H of the ink cartridge 20 is provided between two adjacent plates between the first plate 310, the second plate 320, the third plate 330 and the fourth plate 340; and a fold extending in the height direction H of the ink cartridge 20 is provided between the inwardly folding portion and the corresponding other portion of the third plate 330 and the fourth plate 340. As a means of connecting the plates of the protective housing 10, the sheet 300 further comprises a connection plate 360. As shown in FIG. 7, the connection plate 360 ​​is located on one side of the first plate 310. Between the connection plate 360 ​​and the first plate 310, a fold is provided that extends in the height direction H of the ink cartridge 20. The connection plate 360 ​​is configured to join the fourth plate 340. Both the dimension occupied by the first inward-folding portion 331 of the third plate 330 and the dimension occupied by the second inward-folding portion 341 of the fourth plate 340 are smaller than those of plates 330 and 340. Specifically, the height dimension of the first inward-folding portion 331 is flush with the lower surface of the cartridge body 21, and the width dimension of the first inward-folding portion 331 is less than the width of the third plate 330, so that a portion of plate 330 required by the second housing space 120 can be reserved. The height of the second inward-folding portion 341 is flush with the lower surface of the cartridge body 21, and the width of the second inward-folding portion 341 is preferably less than the width of the fourth plate 340. As shown in FIG. 6, the lower surface of the cartridge body 21 can be supported in more positions. As shown in FIG. 6, a projection of the first inward-folding portion 331 and the second inward-folding portion 341 together on the lower surface of the cartridge body 21 is L-shaped. Depending on actual requirements, the projection of the inward-folding portion on the lower surface of the cartridge body 21 can also have a different shape. For example, as shown in FIG. 8, an L-shaped support piece 200 is formed at each of the two corners of the protective housing 10. When the sheet 300 is made of paper material, the total length of the inward-folding portion is proportional to the portion of the sheet 300 used. When the sheet 300 is made of plastic material, the projection can be Z-shaped (not shown) or another shape in addition to those mentioned above. As shown in Figures 1 and 3, the top of the ink cartridge 20 is provided with tab 202. Specifically, tab 202 is arranged around the perimeter of the outer side of the top of the cartridge body 21. The perimeter dimension of the upper edge 111 of the first housing space 110 is substantially the same as the perimeter dimension on the top of the cartridge body 21. As shown in Figures 3 and 4, the perimeter dimension of the upper edge 111 of the first housing space 110 is smaller than the perimeter dimension of tab 202 on the top of the ink cartridge 20. The upper edge 111 of the protective housing 10 can help support tab 202 on the top of the ink cartridge 20, thereby improving the protective effect. As shown in Figures 1 and 3, a locking structure 203 is also provided on the top of the ink cartridge 20, and the support effect can be further enhanced by the support of the locking structure 203. Specifically, as shown in Figure 2, a groove 130 is located on the top of the housing piece 100, and the groove 130 is configured to accommodate the locking structure 203 of the ink cartridge 20. Different ink cartridges 20 may have different locking structures 203. As shown in Figures 1 and 2, the locking structure 203 is provided on each of the two opposite sides of the ink cartridge 20, and one or more locking structures 203 may be provided on each side. Therefore, slot 130 is provided in each position corresponding to the locking structure 203. In other embodiments, the locking structure 203 is provided only on one side of the ink cartridge 20. The groove 130 is preferably recessed downwards from the upper edge 111 of the housing piece 100. In other embodiments, the groove 130 may also penetrate the plate from the top of the housing piece 100, providing support at a lower edge of the groove 130 and a limit at an upper edge of the groove 130. The distance D between the lower edge of the second housing space 121 and the end surface of the printhead 22 ranges from 6 mm to 10 mm. The distance D can be configured according to the weight of the ink cartridge 20, the support of the tab 202 on the top of the ink cartridge 20 by the upper edge 111 of the protective housing 10, and the support of the locking structure 203 by the slot 130. As shown in FIG. 1, an information-carrying component for the ink cartridge 20, typically an ink cartridge QR code 24, is provided on the surface of the ink cartridge 20. The QR code 24 is usually located on the tail of the ink cartridge 20. Information such as the manufacturing date, batch number, and ink type of the cartridge 20 can be obtained by scanning the QR code 24. As shown in FIG. 2 and 3, the housing piece 100 is provided with a window 140 in the fourth wall 340 of the first housing space, and a position of the window 140 is configured to be aligned with the component that carries the information for the ink cartridge 20. As shown in FIG. 7, the window 140 is provided on the top of the fourth plate 340. Implementation 2 In embodiment 1, a protective housing 10 is provided for an ink cartridge 20. The protective housing 10 is provided with a support piece 200, and is further provided with a slot 130 for coupling with a locking structure 203, and an observation window 140. The concept of this embodiment is substantially the same as that of embodiment 1, with the difference being that, as shown in FIG. 9, the protective housing 10 of this embodiment is provided with a support piece 200 and an observation window 140, but no slot 130 is provided on an upper edge 111 of the protective housing 10. Implementation 3 The concept of this embodiment is substantially the same as that of embodiment 1, with one difference being that, as shown in FIG. 10, the protective housing 10 of this embodiment is provided with a support piece 200 and a slot 130 to fit with a locking structure 203, but there is no window 140 in a side wall of the protective housing 10. As shown in FIG. 10, in each of the two opposite side walls of the protective housing 10 there is a slot 130, and the slot 130 is in the form of a long strip. Implementation 4 In embodiment 1, an embodiment is provided in which a protective housing is formed by folding a 300 sheet, which can be used to manufacture and form any of the protective housings of embodiments 1-3 described above. In this embodiment, another method is provided for manufacturing and forming a protective housing, which can also be used to manufacture and form any of the protective housings of embodiments 1-3 described above. Specifically, the protective housing is formed by mold pressing. The materials used for pressing can be a paper material and a plastic material. The paper material in embodiment 1 and this embodiment can be specifically made from, for example, but not limited to, recycled pulp or raw wood pulp. Recycled pulp is obtained from used paper (such as newspapers and magazines) and is inexpensive and environmentally friendly. Raw wood pulp is made from wood fibers and has greater strength and durability. The plastic material in embodiment 1 and this embodiment may be specifically made of, for example, but not limited to, materials such as polystyrene (PS), polyethylene (PE), or polypropylene (PP). These materials have good water resistance and durability. Furthermore, it can also be made with biodegradable materials, which are typically composed of materials such as paper pulp, cornstarch, bamboo fibers, or bioplastics. These materials are not only environmentally friendly but also biodegradable in the natural environment, reducing pollution. Implementation 5 This embodiment provides packaging for the ink cartridge, as shown in FIG. 3, the ink cartridge packaging comprises the protective housing 10 for an ink cartridge 20 in any of the embodiments 1-4 described above. The ink cartridge packaging further comprises an outer packaging element (not shown). At least one protective housing 10 is provided in the outer packaging element, and the protective housing 10 is configured to accommodate an ink cartridge 20. Specifically, the outer packaging element may be a component such as a paper wrapper or a plastic wrapping film. In general, the outer packaging element is configured to encapsulate a plurality of protective housings. As shown in FIGS. 1 and 6, the print head 22 is further covered with a protective film 30. The protective film 30 can prevent ink leakage, dust, ink runoff, and the like, while providing overall protection to the print head 22. Although the specific implementation of this disclosure has been described above, those skilled in the art should understand that this is only an example, and that the scope of protection of this disclosure is limited by the accompanying claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and substance of this disclosure, and all such changes and modifications must be within the scope of protection of this disclosure.

Claims

1. A protective housing (10) for an ink cartridge (20), the ink cartridge (20) comprising a cartridge body (21) and a print head (22), the print head (22) projecting from a partial region of a lower surface of the cartridge body (21), characterized in that the protective housing (10) comprises a housing piece (100) and a support piece (200) connected to the housing piece (100), the housing piece (100) being provided with a first housing space (110) configured to house the cartridge body (21) and a second housing space (120) configured to house the print head (22),and the first housing space (110) is in communication with the second housing space (120); the support piece (200) extends in the height direction (H) of the ink cartridge (20) and is arranged adjacent to the second housing space (120) so that other regions of the lower surface of the cartridge body (201) bear against it; and at least a portion of a lower edge (211) of the support piece (200) is flush with a lower edge of the second housing space (121); and in the height direction (H) of the ink cartridge (20), the lower edge of the second housing space (121) is lower than an end surface of the printhead (22).

2. The protective housing for an ink cartridge according to claim 1, wherein the protective housing (10) is a sheet folded to form the housing piece and the support piece (200),and the support piece (200) is a partially folded structure of the sheet inward in a direction close to the second housing space (120).

3. The protective housing for an ink cartridge according to claim 2, wherein the sheet (300) comprises a plurality of plates arranged in sequence, a printhead end plate located at one end of the printhead and a tail end plate located at one end of the tail are connectable to each other; at least one of the plurality of plates is provided with an inwardly folded portion, and a cut (350) is provided between the inwardly folded portion and another portion of the plate.

4. The protective housing for an ink cartridge according to claim 3, wherein in the plate provided with the inwardly folded portion,The cut (350) is provided in the plate in a position flush with the lower surface of the cartridge body (201).

5. The protective housing for an ink cartridge according to claim 3, wherein the sheet (300) comprises a first plate (310), a second plate (320), a third plate (330), and a fourth plate (340) arranged in sequence, and the first plate (310) and the fourth plate (340) are connectable to each other; each of the third plate (330) and the fourth plate (340) is provided with the inwardly folding portion (331), and the cut (350) is provided between the inwardly folding portion (331) and another portion of each of the third plate (330) and the fourth plate (340).

6. The protective housing for an ink cartridge according to claim 5, wherein a fold extending in the direction of the height (H) of the ink cartridge (20) is provided between two adjacent plates between the first plate (310),the second plate (320), the third plate (330), and the fourth plate (340); and a fold extending in the direction of the height of the ink cartridge (20) is provided between the inwardly folding portion (331) and the corresponding portion of the third plate (330) and the fourth plate (340).

7. The protective housing for an ink cartridge according to claim 5, wherein the sheet (300) comprises a connecting plate (360), and the connecting plate (360) is located on one side of the first plate (310), wherein the connecting plate (360) is intended to be attached to the fourth plate (340).

8. The protective housing for an ink cartridge according to claim 1, wherein a projection of the support piece (200) onto the lower surface of the cartridge body (21) is L-shaped; and / or the protective housing (10) is made of a paper material or a plastic material. I,The distance (D) between the lower edge of the second housing space (121) and the end surface of the printhead (22) ranges from 6 mm to 10 mm.

9. The protective housing for an ink cartridge according to claim 1, wherein a perimeter dimension of an upper edge (111) of the top of the first housing space (110) is smaller than the perimeter dimension of a tab (202) on a top portion of the ink cartridge (20).

10. The protective housing for an ink cartridge according to claim 1, wherein a slot (130) is provided on a top portion of the housing piece (100), and the slot (130) is configured to accommodate a locking structure (203) of the ink cartridge (20).

11. The protective housing for an ink cartridge according to claim 10,wherein the groove (130) is recessed downwards from an upper edge of the housing piece (100).

12. An ink cartridge packaging, characterized in that the ink cartridge packaging (20) comprises the protective housing (10) for an ink cartridge (20) according to any one of claims 1 to 11.

13. The ink cartridge packaging according to claim 12, wherein the ink cartridge packaging (20) further comprises an outer packaging element, wherein at least one of the protective housings (10) is provided in the outer packaging element, and the protective housing (10) is configured to accommodate an ink cartridge (20).