Cartridge assembly and 3D printer

Abstract

The application discloses a material box assembly and a 3D printer, and relates to the field of 3D printing. The material box assembly comprises a material box frame, a first limiting piece, a film layer and a pressing frame. The first limiting piece is annularly arranged at one end of the material box frame. The film layer is stacked on the side of the first limiting piece away from the material box frame. The pressing frame is annularly arranged on the side of the film layer away from the first limiting piece, and the pressing frame and the first limiting piece are respectively in close contact with the two opposite sides of the film layer. At least one of the first limiting piece and the pressing frame is provided with a clamping structure on the side facing the film layer, and the clamping structure is in close contact with the film layer. The application can solve the problem that the current film pressing mode is prone to film sliding.

Description

Technical Field

[0001] This application belongs to the technical field of 3D printing, specifically relating to a material box assembly and a 3D printer. Background Technology

[0002] The photocurable cartridge stretching structure in related technologies mainly uses a film frame to press the film tightly against the cartridge to fix the film, and a ring of screws is installed on the film frame to ensure the stability of the film. However, because some films used are relatively smooth, such as release films, the above-mentioned pressing method is prone to film slippage, which will adversely affect printing. In addition, the above method is relatively cumbersome and reduces printing efficiency. Utility Model Content

[0003] The purpose of this application is to provide a material box assembly and a 3D printer that can solve problems such as film slippage that easily occur in the current film pressing method.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, embodiments of this application provide a material box assembly, including: a material box frame, a first limiting member, a film layer, and a pressing frame; The first limiting member is circumferentially disposed at one end of the material box frame; The film layer is stacked on the side of the first limiting member opposite to the material box frame; The pressure frame is disposed on the side of the film layer away from the first limiting member, and the pressure frame and the first limiting member abut against the opposite sides of the film layer respectively; At least one of the first limiting member and the pressure frame has an interlocking structure on the side facing the film layer, and the interlocking structure abuts against the film layer.

[0005] In this embodiment, the film layer is located between the first limiting member and the pressure frame. Thus, the first limiting member and the pressure frame can abut against the two sides of the film layer from opposite sides, increasing the squeezing force and frictional resistance between the film layer and the first limiting member and the pressure frame. Furthermore, the interlocking structure abuts against the film layer, increasing the coefficient of friction and further increasing frictional resistance. This effectively alleviates the problem of the film layer sliding under load and improves the sealing effect of the entire material box, preventing material leakage from the sides of the film layer. Therefore, the normal operation of the printing process can be guaranteed.

[0006] Secondly, embodiments of this application also provide another material box assembly, including: a material box frame, a first limiting member, a second limiting member, a film layer, and a pressing frame; The first limiting member is circumferentially disposed at one end of the material box frame; The film layer is stacked on the side of the first limiting member opposite to the material box frame; The pressure frame ring is located on the side of the membrane layer opposite to the first limiting member; The second limiting member is arranged in a ring between the pressure frame and the film layer; The first limiting member and the second limiting member respectively abut against the opposite sides of the film layer.

[0007] In this embodiment, the film layer is located between the first limiting member and the second limiting member. In this way, the first limiting member and the second limiting member can press against the two sides of the film layer from opposite sides, which helps to increase the squeezing force and frictional resistance between the film layer and the first and second limiting members respectively. This can effectively alleviate the problem of the film layer sliding under load, and also help to improve the sealing effect of the entire material box, preventing material from leaking from the sides of the film layer. Therefore, the normal operation of the printing process can be guaranteed.

[0008] Thirdly, this application also provides a 3D printer that includes any of the above-mentioned cartridge components. Thus, the 3D printer can also achieve the technical effects that the above-mentioned cartridge components can achieve. Attached Figure Description

[0009] Figure 1 This is a disassembly diagram of the first type of material box assembly disclosed in the embodiments of this application; Figure 2 This is a schematic diagram of the assembly of the first type of material box assembly disclosed in the embodiments of this application; Figure 3 for Figure 2 A schematic cross-sectional view along the middle AA section; Figure 4 for Figure 3 Enlarged view of point B in the middle; Figure 5 This is a partial schematic diagram of the second form of the material box assembly disclosed in the embodiments of this application; Figure 6 This is a partial schematic diagram of the third form of the cartridge assembly disclosed in the embodiments of this application; Figure 7 This is a partial schematic diagram of the fourth type of cartridge assembly disclosed in the embodiments of this application.

[0010] Explanation of reference numerals in the attached figures: 10-Material box frame; 11-Side wall; 111-Limiting groove; 12-Connecting column; 20 - First limiting member; 21 - First engaging part; 22 - First mounting hole; 30 - Second limiting member; 31 - Third engaging part; 40 - Membrane layer; 41 - Third mounting hole; 50 - Pressure frame; 51 - Second engagement part; 52 - Second mounting hole. Detailed Implementation

[0011] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0012] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0013] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0014] refer to Figures 1 to 7 This application discloses a material box assembly that can be applied to a 3D printer. The disclosed material box assembly includes a material box frame 10, a first limiting member 20, a film layer 40, and a pressure frame 50.

[0015] The material box frame 10 is a basic component, which provides a support and installation base for components such as the first limiting member 20, the membrane layer 40, and the pressure frame 50. One end of the material box frame 10 may be provided with an opening, and the pressure frame 50 can fix the membrane layer 40 to the opening of the material box frame 10 to achieve a seal.

[0016] To limit the position of the film layer 40, a first limiting member 20 can be provided between one end of the film layer 40 and the material box frame 10, so as to limit the film layer 40 to a certain extent and alleviate the sliding of the film layer 40 relative to one end of the material box frame 10.

[0017] In this embodiment, the first limiting member 20 can be arranged around one end of the material box frame 10, the film layer 40 is stacked on the side of the first limiting member 20 away from the material box frame 10, and the pressure frame 50 is arranged around the side of the film layer 40 away from the first limiting member 20. The pressure frame 50 and the first limiting member 20 are respectively pressed against the opposite sides of the film layer 40. In this way, the first limiting member 20 and the frame are respectively limited and matched with the film layer 40 to ensure the installation stability of the film layer 40 and prevent the film layer 40 from sliding.

[0018] Optionally, the first limiting member 20 can be an annular limiting frame, and the pressure frame 50 can be an annular pressure frame 50, so that the opposite sides of the film layer 40 are not obstructed, ensuring the normal use of the film layer 40.

[0019] Based on the above settings, under the pressing action of the pressure frame 50 and the first limiting member 20, the film layer 40 is clamped between the pressure frame 50 and the first limiting member 20, which can effectively prevent the film layer 40 from sliding relative to the material box frame 10 when subjected to force, thereby improving the installation stability of the film layer 40.

[0020] It should be noted that, since the first limiting member 20 and the pressure frame 50 are respectively pressed against the opposite sides of the film layer 40, frictional resistance can be generated between the first limiting member 20 and the pressure frame 50 and the side of the film layer 40, thereby ensuring that the film layer 40 is not easy to slide.

[0021] Optionally, the first limiting member 20 can be an anti-slip member, which can generate frictional resistance on the side of the film layer 40 after it is pressed against the film layer 40, so as to alleviate the problem of the film layer 40 sliding.

[0022] To further improve frictional resistance, at least one of the first limiting member 20 and the pressure frame 50 may be provided with an interlocking structure on the side facing the film layer 40. This interlocking structure abuts against the film layer 40. In this way, by providing the interlocking structure, the coefficient of friction between at least one of the first limiting member 20 and the pressure frame 50 and the side of the film layer 40 can be increased, thereby increasing the frictional resistance without changing the abutting force. This can further prevent the film layer 40 from sliding during use and ensure the stability of the film layer 40.

[0023] Based on the above configuration, in this embodiment, the first limiting member 20 and the pressure frame 50 abut against the two sides of the film layer 40 from opposite sides, which helps to increase the squeezing force and frictional resistance between the film layer 40 and the first limiting member 20 and the pressure frame 50. In addition, the interlocking structure can also abut against the film layer 40 to achieve an interlocking effect, which can increase the coefficient of friction and further increase the frictional resistance. This can effectively alleviate the problem of the film layer 40 sliding under load, and can also help improve the sealing effect of the entire material box, preventing material from leaking from the side of the film layer 40. Therefore, the normal operation of the printing process can be guaranteed.

[0024] refer to Figures 4 to 6 In some embodiments, the interlocking structure may include a first interlocking portion 21, which is disposed on the side of the first limiting member 20 facing the film layer 40. In this way, the friction coefficient between the first limiting member 20 and the film layer 40 can be increased, thereby increasing the frictional resistance between the first limiting member 20 and the film layer 40 without changing the clamping force, so as to further improve the stability of the film layer 40 and effectively alleviate the problem of slippage of the film layer 40 under load.

[0025] Optionally, the first engagement portion 21 may include at least one of a groove and a protrusion. For example, the first engagement portion 21 may only include a groove. In this case, when the film layer 40 is compressed by the pressure frame 50, at least a portion of the film layer 40 may deform and enter the groove, thereby increasing the obstructive effect of the first engagement portion 21 on the film layer 40.

[0026] The first engagement portion 21 may include a protrusion alone. In this case, when the membrane layer 40 is pressed by the pressure frame 50, at least a portion of the protrusion can be pressed into the membrane layer 40, thereby increasing the obstructive effect of the first engagement portion 21 on the membrane layer 40.

[0027] Of course, the first engagement portion 21 may also include a groove and a protrusion. In this case, when the film layer 40 is pressed by the pressure frame 50, a part of the film layer 40 may deform and enter the groove, and at least a part of the protrusion may be pressed into another part of the film layer 40, thereby increasing the obstructive effect of the first engagement portion 21 on the film layer 40.

[0028] In addition to grooves and protrusions, the first engagement portion 21 can also take other forms, as long as it can increase the frictional resistance to the film layer 40, and the specific form is not limited.

[0029] In other embodiments, the interlocking structure may further include a second interlocking portion 51, which is disposed on the side of the pressure frame 50 facing the film layer 40. In this way, the coefficient of friction between the pressure frame 50 and the film layer 40 can be increased, thereby increasing the frictional resistance between the pressure frame 50 and the film layer 40 without changing the clamping force, so as to further improve the stability of the film layer 40 and effectively alleviate the problem of slippage of the film layer 40 under load.

[0030] Optionally, the second engagement portion 51 may include at least one of a groove and a protrusion. For example, the second engagement portion 51 may only include a groove. In this case, when the film layer 40 is compressed by the pressure frame 50, at least a portion of the film layer 40 may deform and enter the groove, thereby increasing the obstructive effect of the second engagement portion 51 on the film layer 40.

[0031] The second engagement portion 51 may include a protrusion alone. In this case, when the membrane layer 40 is pressed by the pressure frame 50, at least a portion of the protrusion can be pressed into the membrane layer 40, thereby increasing the obstructive effect of the second engagement portion 51 on the membrane layer 40.

[0032] Of course, the second engagement portion 51 may also include a groove and a protrusion. In this case, when the film layer 40 is pressed by the pressure frame 50, a part of the film layer 40 may deform and enter the groove, and at least a part of the protrusion may be pressed into another part of the film layer 40, thereby increasing the obstructive effect of the second engagement portion 51 on the film layer 40.

[0033] In addition to grooves and protrusions, the second engagement portion 51 can also take other forms, as long as it can increase the frictional resistance to the film layer 40, and the specific form is not limited.

[0034] refer to Figure 4 In some embodiments, the first engagement portion 21 and the second engagement portion 51 can be arranged opposite to each other along the thickness direction of the film layer 40, with a portion of the film layer 40 located between the first engagement portion 21 and the second engagement portion 51. Thus, under the pressing action of the pressing frame 50, the first engagement portion 21 and the second engagement portion 51 engage with each other, such as the first engagement portion 21 being embedded in the second engagement portion 51, or the second engagement portion 51 being embedded in the first engagement portion 21. Since the film layer 40 can deform, the film layer 40 can be pressed between the first engagement portion 21 and the second engagement portion 51 and clamped and fixed, thereby further improving the stability of the film layer 40 and alleviating the problem of the film layer 40 sliding.

[0035] In some other embodiments, the first biting portion 21 and the second biting portion 51 may also be staggered along the extension direction of the film layer 40. In this case, the first biting portion 21 and the second biting portion 51 can also bite the opposite sides of the film layer 40, which can increase the frictional resistance.

[0036] refer to Figure 5 In other embodiments, the first limiting member 20 may not have the first engaging portion 21, and only the pressure frame 50 may have the second engaging portion 51. In this case, the first limiting member 20 and the second engaging portion 51 are arranged opposite to each other along the thickness direction of the film layer 40, and a portion of the film layer 40 is located between the first limiting member 20 and the second engaging portion 51. Based on this, under the pressing action of the pressure frame 50, the first limiting member 20 can be embedded into the second engaging portion 51. Since the film layer 40 can deform, it can be pressed between the first limiting member 20 and the second engaging portion 51 and clamped and fixed, thereby further improving the stability of the film layer 40 and alleviating the problem of the film layer 40 sliding.

[0037] To further enhance the barrier effect on the membrane layer 40, the cartridge assembly may also include a second limiting member 30, such as... Figure 6 and Figure 7 As shown, the second limiting member 30 is provided on the side of the pressure frame 50 facing the film layer 40, and the second limiting member 30 abuts against the film layer 40. In this way, through the limiting cooperation between the second limiting member 30 and the film layer 40, the frictional resistance between the side of the pressure frame 50 and the film layer 40 can be increased, further enhancing the obstruction effect on the film layer 40, making the film layer 40 more stable and less prone to slippage.

[0038] Optionally, the second limiting member 30 can be an anti-slip member, which can generate frictional resistance on the side of the film layer 40 after it is pressed against the film layer 40, so as to alleviate the problem of the film layer 40 sliding.

[0039] Based on the above configuration, the first limiting member 20 and the second limiting member 30 can respectively abut against the opposite sides of the film layer 40, thereby generating greater frictional resistance on the opposite sides of the film layer 40, greatly improving the obstruction effect on the film layer 40, and further making the film layer 40 more stable.

[0040] Furthermore, a third engagement portion 31 may be provided on the side of the second limiting member 30 facing the film layer 40, such as... Figure 6 As shown, the third engagement portion 31 abuts against the film layer 40, thereby increasing the coefficient of friction between the second limiting member 30 and the film layer 40. This increases the frictional resistance between the second limiting member 30 and the film layer 40 without changing the abutting force, further improving the stability of the film layer 40 and effectively alleviating the problem of the film layer 40 sliding under load.

[0041] Optionally, the third engagement portion 31 may include at least one of a groove and a protrusion. For example, the third engagement portion 31 may only include a groove. In this case, when the membrane layer 40 is compressed by the pressure frame 50, at least a portion of the membrane layer 40 may deform and enter into the groove, thereby increasing the obstructive effect of the third engagement portion 31 on the membrane layer 40.

[0042] The third engagement portion 31 may include a protrusion alone. In this case, when the membrane layer 40 is pressed by the pressure frame 50, at least a portion of the protrusion can be pressed into the membrane layer 40, thereby increasing the obstructive effect of the third engagement portion 31 on the membrane layer 40.

[0043] Of course, the third engagement portion 31 may also include a groove and a protrusion. In this case, when the membrane layer 40 is pressed by the pressure frame 50, a part of the membrane layer 40 may deform and enter the groove, and at least a part of the protrusion may be pressed into another part of the membrane layer 40, thereby increasing the obstructive effect of the third engagement portion 31 on the membrane layer 40.

[0044] In addition to grooves and protrusions, the third engagement portion 31 can also take other forms, as long as it can increase the frictional resistance to the film layer 40, and the specific form is not limited.

[0045] Continue to refer to Figure 6 In some embodiments, the first engaging portion 21 and the third engaging portion 31 can be disposed opposite to each other along the thickness direction of the film layer 40, with a portion of the film layer 40 located between the first engaging portion 21 and the third engaging portion 31. Based on this, under the pressing action of the pressing frame 50, the first engaging portion 21 and the third engaging portion 31 engage with each other, for example, the first engaging portion 21 is embedded in the third engaging portion 31, or the third engaging portion 31 is embedded in the first engaging portion 21. Since the film layer 40 can deform, the film layer 40 can be pressed between the first engaging portion 21 and the third engaging portion 31 and clamped and fixed, thereby further improving the stability of the film layer 40 and alleviating the problem of the film layer 40 sliding.

[0046] Optionally, the film layer 40 can be a release film containing fluorine, which generally has a low coefficient of friction with materials such as aluminum alloy, stainless steel, and plastic.

[0047] Based on the above, the first limiting member 20 in this embodiment can be made of rubber. After it is pressed against the film layer 40, it can increase the obstruction effect on the film layer 40 and effectively prevent the film layer 40 from sliding at will.

[0048] The second limiting member 30 can be made of rubber. When it is pressed against the film layer 40, it can increase the resistance to the film layer 40 and effectively prevent the film layer 40 from sliding at will.

[0049] Of course, the first limiting member 20 and the second limiting member 30 can each be made of other materials, which are not specifically limited here.

[0050] In some embodiments, the first limiting member 20 may be arranged around one end of the material box frame 10 by means of embedding, injection molding, bonding, snap-fitting, etc., to ensure the stability of the first limiting member 20 on the material box frame 10.

[0051] In some more specific embodiments, the side wall 11 at one end of the material box frame 10 may be provided with a limiting groove 111, such as... Figure 1 As shown, the first limiting member 20 can be arranged around the limiting groove 111. This includes the first limiting member 20 being arranged around the limiting groove 111 by means of embedding, injection molding, bonding or snap-fitting, so that the limiting groove 111 can accommodate the first limiting member 20, and the inner wall of the limiting groove 111 can limit the first limiting member 20, thereby further improving the stability of the first limiting member 20 and effectively preventing the first limiting member 20 from detaching from the material box frame 10 when subjected to the reaction force of the film layer 40.

[0052] In some embodiments, the second limiting member 30 may be arranged around the pressure frame 50 by means of embedding, inserting, injection molding, overmolding, bonding or snapping, so as to ensure the stability of the second limiting member 30 on the pressure frame 50.

[0053] In some more specific embodiments, the second limiting member 30 may also be located in the limiting groove 111, so that the second limiting member 30 can be accommodated by the limiting groove 111, and the inner wall of the limiting groove 111 can also limit the second limiting member 30, so as to further improve the stability of the second limiting member 30 and effectively prevent the second limiting member 30 from detaching from the pressure frame 50 when subjected to the reaction force of the film layer 40.

[0054] Continue to refer to Figure 1 In some embodiments, one end of the material box frame 10 may be provided with a plurality of connecting posts 12, which are arranged circumferentially along the material box frame 10; correspondingly, the first limiting member 20 may be provided with a plurality of first mounting holes 22, the pressure frame 50 may be provided with a plurality of second mounting holes 52, the film layer 40 may be provided with a plurality of third mounting holes 41, and each connecting post 12 may be sequentially inserted into the oppositely arranged first mounting hole 22, third mounting hole 41 and second mounting hole 52.

[0055] Based on the above configuration, the outer wall of the connecting column 12 and the inner walls of the first mounting hole 22, the second mounting hole 52 and the third mounting hole 41 respectively can be used to limit the first limiting member 20, the film layer 40 and the pressure frame 50, so as to prevent the first limiting member 20, the film layer 40 and the pressure frame 50 from being misaligned relative to the material box frame 10, thus ensuring the stability of the entire material box assembly.

[0056] This application also discloses another form of material box assembly, which includes a material box body, a first limiting member 20, a second limiting member 30, a film layer 40, and a pressure frame 50, as shown below. Figure 1 , Figure 6 and Figure 7 As shown.

[0057] The first limiting member 20 is circumferentially disposed at one end of the material box frame 10, the film layer 40 is stacked on the side of the first limiting member 20 away from the material box frame 10, the pressure frame 50 is stacked on the side of the film layer 40 away from the first limiting member 20, and the second limiting member 30 is circumferentially disposed between the pressure frame 50 and the film layer 40. The first limiting member 20 and the second limiting member 30 respectively abut against the opposite sides of the film layer 40.

[0058] Based on the above configuration, in this embodiment, the first limiting member 20 and the second limiting member 30 abut against the two sides of the film layer 40 from opposite sides, which helps to increase the squeezing force and frictional resistance between the film layer 40 and the first limiting member 20 and the second limiting member 30, thereby effectively alleviating the problem of the film layer 40 sliding under load. It also helps to improve the sealing effect of the entire material box assembly and prevent material from leaking from the sides of the film layer 40. Therefore, it can ensure the normal operation of the printing process.

[0059] It should be noted that the main difference between this embodiment and the material box assembly in the above embodiments is that this embodiment includes both the first limiting member 20 and the second limiting member 30, and the first limiting member 20 and the second limiting member 30 may or may not have an interlocking structure, or they may each have an interlocking structure. The specific structures and connection relationships of components such as the material box frame 10, the first limiting member 20, the second limiting member 30, the film layer 40, and the pressure frame 50 can be found in the relevant content of the above embodiments, and will not be repeated here.

[0060] Based on the different types of cartridge assemblies described above, this application also discloses a 3D printer, which includes any of the aforementioned types of cartridge assemblies. In addition, the 3D printer may include other components to meet 3D printing requirements; specific details can be found in the prior art, which will not be elaborated here.

[0061] In summary, by adding a limiting member to at least one side of the film layer 40, the frictional resistance borne by the film layer 40 at at least one side can be increased, thereby effectively alleviating the problem of slippage of the film layer 40 under load, ensuring the stability of the film layer 40, and at the same time ensuring the sealing of the film layer 40 at at least one side to prevent leakage of printing material.

[0062] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A material box assembly, characterized in that, include: Material box frame (10), first limiting member (20), film layer (40) and pressure frame (50); The first limiting member (20) is circumferentially disposed at one end of the material box frame (10); The film layer (40) is stacked on the side of the first limiting member (20) opposite to the material box frame (10); The pressure frame (50) is arranged around the side of the film layer (40) away from the first limiting member (20), and the pressure frame (50) and the first limiting member (20) respectively abut against the opposite sides of the film layer (40); At least one of the first limiting member (20) and the pressure frame (50) has an interlocking structure on the side facing the film layer (40), and the interlocking structure abuts against the film layer (40).

2. The cartridge assembly of claim 1, wherein, The engagement structure includes a first engagement portion (21) disposed on the side of the first limiting member (20) facing the membrane layer (40), the first engagement portion (21) including at least one of a groove and a protrusion.

3. The cartridge assembly of claim 2, wherein, The interlocking structure further includes a second interlocking portion (51) disposed on the side of the pressure frame (50) facing the film layer (40), the second interlocking portion (51) including at least one of a groove and a protrusion.

4. The cartridge assembly of claim 3, wherein, The first biting portion (21) and the second biting portion (51) are disposed opposite to each other along the thickness direction of the membrane layer (40), and a portion of the membrane layer (40) is located between the first biting portion (21) and the second biting portion (51).

5. The cartridge assembly of claim 3, wherein, The first limiting member (20) and the second engaging part (51) are disposed opposite to each other along the thickness direction of the film layer (40), and a portion of the film layer (40) is located between the first limiting member (20) and the second engaging part (51).

6. The cartridge assembly of any one of claims 1 to 5, wherein, The first limiting member (20) is an anti-slip member.

7. The cartridge assembly of claim 1 or 2, wherein, The material box assembly further includes a second limiting member (30), which is disposed on the side of the pressure frame (50) facing the film layer (40) and abuts against the film layer (40).

8. The cartridge assembly of claim 7, wherein, The second limiting member (30) has a third engagement part (31) on the side facing the film layer (40), and the third engagement part (31) abuts against the film layer (40).

9. The cartridge assembly of claim 8, wherein, The interlocking structure includes a first interlocking portion (21) disposed on the side of the first limiting member (20) facing the membrane layer (40), the first interlocking portion (21) and the third interlocking portion (31) are disposed opposite to each other along the thickness direction of the membrane layer (40), and a portion of the membrane layer (40) is located between the first interlocking portion (21) and the third interlocking portion (31).

10. The material box assembly according to claim 8, characterized in that, The third engagement portion (31) includes at least one of a groove and a protrusion.

11. The cartridge assembly of claim 7, wherein, The second limiting member (30) is an anti-slip member.

12. The cartridge assembly of claim 7, wherein, The first limiting member (20) is made of rubber. And / or, the second limiting member (30) is made of rubber.

13. The cartridge assembly of claim 7, wherein, The material box frame (10) has a limiting groove (111) on one side wall, and the first limiting member (20) is circumferentially arranged in the limiting groove (111) by means of embedding, injection molding, bonding or snapping. And / or, the second limiting member (30) is circumferentially disposed on the pressure frame (50) by means of embedding, inserting, injection molding, overmolding, bonding or snapping.

14. The cartridge assembly of any one of claims 1 to 5, wherein, The material box frame (10) is provided with a plurality of connecting posts (12) at one end, and the plurality of connecting posts (12) are arranged along the circumference of the material box frame (10); The first limiting member (20) is provided with a plurality of first mounting holes (22), the pressure frame (50) is provided with a plurality of second mounting holes (52), and the membrane layer (40) is provided with a plurality of third mounting holes (41). Each of the connecting posts (12) is sequentially inserted into the first mounting hole (22), the third mounting hole (41) and the second mounting hole (52) that are arranged opposite to each other.

15. A cartridge assembly, comprising: include: The material box frame (10), the first limiting member (20), the second limiting member (30), the film layer (40), and the pressure frame (50); The first limiting member (20) is circumferentially disposed at one end of the material box frame (10); The film layer (40) is stacked on the side of the first limiting member (20) opposite to the material box frame (10); The pressure frame (50) is arranged around the side of the membrane layer (40) opposite to the first limiting member (20); The second limiting member (30) is arranged in a ring between the pressure frame (50) and the film layer (40); The first limiting member (20) and the second limiting member (30) abut against the opposite sides of the film layer (40).

16. A 3D printer, characterized in that, Includes the cartridge assembly as described in any one of claims 1 to 15.

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