Ink box and production process thereof

Abstract

The ink box comprises an ink bottle, a nozzle and an elastic sealing piece, the ink bottle is provided with a bottle opening and a bottle shoulder, the bottle shoulder is provided with a first welding part, the lower end of the nozzle is provided with a sleeving part, the bottom of the sleeving part is provided with a second welding part, the sleeving part is arranged on the periphery of the bottle opening in a sleeving mode, and the elastic sealing piece is connected to the bottle opening and the nozzle in a sealed mode. Therefore, the unevenness of the bottle opening can be well compensated, the airtight requirement between the bottle opening and the nozzle is met, and the ink leakage phenomenon of the ink box is avoided. The fastening requirement between the nozzle and the ink bottle is realized by welding and fixing the first welding part and the second welding part, the smoothness of the bottle shoulder of the ink bottle is superior to that of the bottle opening, enough welding area and supporting strength are achieved, the first welding part and the second welding part only need to be welded and fixed, the airtight requirement is not needed, and the manufacturing cost is reduced. Therefore, the welding difficulty is greatly reduced, the overall processing difficulty of the ink box is reduced, the yield of the ink box is improved, and the production cost of the ink box is reduced.

Description

Technical Field

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

[0002] An existing ink cartridge such as Figure 1 As shown, the structure includes an ink bottle, a nozzle, and a nozzle top core, wherein the nozzle and the bottle mouth of the ink bottle are ultrasonically welded to achieve fastening and airtightness. However, in order to match the use of a printer, the shape of the ink bottle is irregular, the bottle mouth is biased to the left, and the bottom of the bottle mouth is suspended and not subjected to force; secondly, the welding surface at the bottle mouth is a small plane; in addition, the ink bottle is a blow-molded structure, and the bottle mouth needs to be sheared twice after molding, which makes the flatness of the bottle mouth very poor and uneven. These factors lead to very high requirements for ultrasonic welding between the nozzle and the bottle mouth, which increases the difficulty and cost of processing the ink cartridge. Due to the difficulty of welding, the defective rate of the ink cartridge production is high, the sealing performance of the ink cartridge is poor, and ink leakage is prone to occur. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide an ink cartridge, which can reduce the processing difficulty and cost of the ink cartridge and prevent ink leakage from occurring in the ink cartridge.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is as follows: an ink cartridge, comprising an ink bottle, a nozzle and an elastic sealing member, the ink bottle having a bottle mouth and a bottle shoulder, the bottle mouth protruding upward from the bottle shoulder, the bottle shoulder being provided with a first welding portion, the lower end of the nozzle being provided with a sleeve portion, the bottom of the sleeve portion being provided with a second welding portion, the sleeve portion being sleeved on the outer periphery of the bottle mouth, the elastic sealing member being sealingly connected to the bottle mouth and the nozzle, and the first welding portion and the second welding portion being welded and fixed.

[0005] Compared with the prior art, the beneficial effect of the present invention is that the ink cartridge is sealed with an elastic seal between the bottle mouth and the nozzle, and the elastic seal can well compensate for the unevenness of the bottle mouth, thereby meeting the airtightness requirement between the bottle mouth and the nozzle, and avoiding ink leakage from the ink cartridge. The fastening requirement between the nozzle and the ink bottle is achieved by welding and fixing the first welding part of the ink bottle shoulder and the second welding part of the nozzle bottom. The flatness of the ink bottle shoulder is better than that of the bottle mouth, and it has sufficient welding area and supporting strength. The first welding part and the second welding part only need to be welded and fixed, and no airtightness requirement is required. Therefore, the welding difficulty is greatly reduced, thereby reducing the overall processing difficulty of the ink cartridge, improving the ink cartridge yield, and reducing the production cost of the ink cartridge.

[0006] In the above-mentioned ink cartridge, the elastic sealing member includes a main body, a first sealing portion and a second sealing portion, the first sealing portion and the second sealing portion are respectively integrally formed at the upper end and the lower end of the main body, a first sleeve connecting hole is provided in the sleeve connecting portion, the first sleeve connecting hole is sleeved on the outer periphery of the main body and the bottle mouth, a second sleeve connecting hole which is interconnected with the first sleeve connecting hole is provided at the upper part of the nozzle, the second sleeve connecting hole is sleeved on the outer periphery of the first sealing portion; the lower end surface and the upper end surface of the main body are respectively sealed and fitted to the upper end surface of the bottle mouth and the top wall of the first sleeve connecting hole, the upper end surface of the first sealing portion is sealed and fitted to the top wall of the second sleeve connecting hole, and the outer peripheral surface of the second sealing portion is sealed and fitted to the inner peripheral surface of the bottle mouth.

[0007] In the above-mentioned ink cartridge, the top wall of the first sleeve hole is provided with an annular sealing protrusion.

[0008] The above-mentioned ink cartridge also includes a nozzle top core, a spring and a spring support, the spring support is installed in the bottle mouth, the spring is installed in the spring support, and the upper and lower ends of the spring respectively abut the nozzle top core and the spring support, and the upper end of the nozzle top core is inserted into the elastic sealing member.

[0009] In the above-mentioned ink cartridge, a supporting step is provided in the bottle mouth, and the spring support includes a mounting portion and an overlapping portion, the mounting portion is inserted into the bottle mouth for mounting the spring, and the overlapping portion overlaps the supporting step; the overlapping portion is provided with a first snap-fit ​​structure, and a second snap-fit ​​structure is provided at the lower part of the elastic sealing member, and the second snap-fit ​​structure is snap-fitted with the first snap-fit ​​structure.

[0010] The ink cartridge further comprises a nozzle buckle cover, which is integrally formed on the top of the nozzle.

[0011] The ink cartridge further comprises a bottle cap, which is sleeved on the outer periphery of the nozzle and snap-connected to the lower end of the shoulder of the ink bottle.

[0012] In the above-mentioned ink cartridge, the second welding portion is an annular protrusion that is larger at the top and smaller at the bottom.

[0013] The present invention also provides a production process for an ink cartridge, which is used to produce the above-mentioned ink cartridge, comprising the following steps:

[0014] Step S100, providing ink bottles, nozzles and elastic sealing components required for production;

[0015] Step S200, installing the elastic sealing member at the bottle mouth;

[0016] Step S300, sleeve the sleeve portion of the nozzle onto the outer periphery of the elastic sealing member and the bottle mouth, so that the elastic sealing member is sealed and connected to the bottle mouth and the nozzle;

[0017] Step S400: The second welding portion of the bottom of the nozzle is welded and fixed to the first welding portion of the shoulder of the ink bottle.

[0018] In the above-mentioned ink cartridge production process, in step S100, the nozzle top core, spring and spring support required for production are also provided;

[0019] In step S200, the nozzle top core, the spring and the spring support are first installed in the bottle mouth, and then the elastic seal is installed. When installing the elastic seal, the second buckle structure at the lower end of the elastic seal is buckled on the first buckle structure of the spring support;

[0020] Step S300 includes the following process: sleeve the nozzle on the outer periphery of the elastic sealing member and the bottle mouth, and sleeve the first sleeve hole on the outer periphery of the main body and the bottle mouth, sleeve the second sleeve hole on the outer periphery of the first sealing portion, the lower end face and the upper end face of the main body are respectively sealed and fitted to the upper end face of the bottle mouth and the top wall of the first sleeve hole, and the upper end face of the first sealing portion is sealed and fitted to the top wall of the second sleeve hole.

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A cross-sectional view of an existing ink cartridge;

[0023] Figure 2 A schematic diagram of the overall structure of an ink cartridge according to an embodiment of the present invention;

[0024] Figure 3 An exploded view of an ink cartridge according to an embodiment of the present invention;

[0025] Figure 4 is a cross-sectional view of an ink cartridge according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the ink cartridge of the embodiment of the present invention after the bottle cap is removed;

[0027] Figure 6 It is a structural schematic diagram of an ink bottle according to an embodiment of the present invention;

[0028] Figure 7 A schematic structural diagram of an elastic sealing member according to an embodiment of the present invention;

[0029] Figure 8 A cross-sectional view of a nozzle according to an embodiment of the present invention;

[0030] Fig. 9 Schematic diagram of the structure of a spring support according to an embodiment of the present invention.

[0031] Description of the accompanying drawings: 100 ink bottle, 110 bottle mouth, 111 supporting step, 120 bottle shoulder, 121 first welding part, 200 nozzle, 210 sleeve part, 211 second welding part, 212 first sleeve hole, 2121 annular sealing protrusion, 220 second sleeve hole, 300 elastic sealing part, 310 main body, 320 first sealing part, 330 second sealing part, 340 second snap-fit ​​structure, 341 elastic conical snap-fit ​​part, 400 nozzle top core, 500 spring, 600 spring support, 610 mounting part, 620 overlapping part, 621 first snap-fit ​​structure, 700 nozzle buckle cover, 800 recycled cotton, 900 bottle cap. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below:

[0033] Embodiment 1

[0034] Reference Figures 2 to 9 Embodiment 1 of the present invention provides an ink cartridge, including an ink bottle 100, a nozzle 200 and an elastic sealing member 300. The ink bottle 100 has a bottle mouth 110 and a bottle shoulder 120. The bottle mouth 110 protrudes upward from the bottle shoulder 120. The bottle shoulder 120 is provided with a first welding portion 121. The lower end of the nozzle 200 is provided with a sleeve portion 210. The bottom of the sleeve portion 210 has a second welding portion 211. The sleeve portion 210 is sleeved on the outer periphery of the bottle mouth 110, and the first welding portion 121 and the second welding portion 211 are welded and fixed. The elastic sealing member 300 is sealed and connected to the bottle mouth 110 and the nozzle 200.

[0035] The ink cartridge has an elastic seal 300 sealed between the bottle mouth 110 and the nozzle 200. The elastic seal 300 can be deformed when subjected to pressure, so as to compensate for the unevenness of the bottle mouth 110, thereby meeting the airtightness requirement between the bottle mouth 110 and the nozzle 200, and avoiding ink leakage from the ink cartridge. The fastening requirement between the nozzle 200 and the ink bottle 100 is achieved by welding and fixing the first welding portion 121 of the shoulder 120 of the ink bottle 100 and the second welding portion 211 at the bottom of the nozzle 200. The flatness of the shoulder 120 of the ink bottle 100 is better than that of the bottle mouth 110, and it has sufficient welding area and supporting strength. The first welding portion 121 and the second welding portion 211 only need to be welded and fixed, and no airtightness requirement is required. Therefore, the welding difficulty is greatly reduced, thereby reducing the overall processing difficulty of the ink cartridge, improving the yield of the ink cartridge, and reducing the production cost of the ink cartridge. Therefore, the ink cartridge can better ensure the quality of the ink cartridge while reducing the processing difficulty. Further, referring to Figure 3 and Figure 8 The second welding portion 211 is a ring-shaped protrusion that is larger at the top and smaller at the bottom, so as to further reduce the difficulty of welding and improve the success rate of welding.

[0036] Further, refer to Figure 7 The elastic seal 300 is an elastic rubber plug. The elastic seal 300 includes a main body 310, a first sealing portion 320 and a second sealing portion 330. The first sealing portion 320 and the second sealing portion 330 are integrally formed at the upper end and the lower end of the main body 310, respectively. Figure 8 A first sleeve hole 212 is provided in the sleeve portion 210, and a second sleeve hole 220 communicating with the first sleeve hole 212 is provided on the upper portion of the nozzle 200. The aperture of the second sleeve hole 220 is smaller than that of the first sleeve hole 212, so that a portion of the step surface is retained on the top wall of the first sleeve hole 212. A through hole communicating with the second sleeve hole 220 is also provided on the upper portion of the nozzle 200 to facilitate ink addition. Figure 4 During installation, the second sealing portion 330 is sealed and inserted into the bottle mouth 110. The outer diameter of the second sealing portion 330 in a natural state is slightly larger than the inner diameter of the bottle mouth 110. When the second sealing portion 330 is inserted toward the bottle mouth 110, the second sealing portion 330 is compressed and contracted and can be inserted into the bottle mouth 110. Under the action of the deformation restoring force, the outer circumferential surface of the second sealing portion 330 is sealed and fitted to the inner circumferential surface of the bottle mouth 110.

[0037] The first sleeve hole 212 is sleeved on the outer periphery of the main body 310 and the bottle mouth 110, and the second sleeve hole 220 is sleeved on the outer periphery of the first sealing part 320. The nozzle 200 applies downward pressure to the elastic sealing member 300, and the elastic sealing member 300 is deformed under pressure. The lower end face and the upper end face of the main body 310 are respectively sealed and fitted to the upper end face of the bottle mouth 110 and the top wall of the first sleeve hole 212, and the upper end face of the first sealing part 320 is sealed and fitted to the top wall of the second sleeve hole 220. Through sealing at least three places, the ink cartridge can well ensure the airtightness requirement between the nozzle 200 and the ink bottle 100 to prevent ink leakage. Furthermore, referring to Figure 8 The top wall of the first sleeve hole 212 is provided with an annular sealing protrusion 2121. When the annular sealing protrusion 2121 and the upper end surface of the main body 310 are pressed against each other, both can be deformed, thereby ensuring close contact and sealing. Furthermore, while ensuring that the upper and lower end surfaces of the main body 310 are sealed and fitted with the top wall of the first sleeve hole 212 and the upper end surface of the bottle mouth 110, and the upper end surface of the first sealing part 320 is sealed and fitted with the top wall of the second sleeve hole 220, the elastic sealing member 300 will expand outward after being compressed, so that the outer circumference of the main body 310 is sealed and fitted with the inner circumference of the first sleeve hole 212, and the outer circumference of the first sealing part 320 is sealed and fitted with the inner circumference of the second sleeve hole 220, thereby further improving the airtightness between the nozzle 200 and the ink bottle 100.

[0038] Further, refer to Figure 3 and Figure 4The ink cartridge further includes a nozzle top core 400, a spring 500 and a spring support 600. The spring support 600 is installed in the bottle mouth 110. The spring 500 is installed in the spring support 600. The upper and lower ends of the spring 500 abut against the nozzle top core 400 and the spring support 600 respectively. The upper end of the nozzle top core 400 is inserted into the elastic sealing member 300. Further, referring to Figure 4 and Figure 6 A support step 111 is provided in the bottle mouth 110, and the spring support 600 includes a mounting portion 610 and a lap portion 620. The mounting portion 610 is inserted into the bottle mouth 110 for mounting the spring 500, and the lap portion 620 is lapped on the support step 111 to prevent the spring from falling into the ink bottle 100.

[0039] Further, refer to Figure 4 , Figure 7 and Fig. 9 , the overlap portion 620 is provided with a first snap-fit ​​structure 621, and the lower portion of the elastic seal 300 is provided with a second snap-fit ​​structure 340, and the second snap-fit ​​structure 340 and the first snap-fit ​​structure 621 are snap-fitted with each other. The ink cartridge designs the spring support 600 as an independent spring support 600, rather than being integrally formed with the nozzle 200, so as to avoid the spring support 600 from being shattered when the first welding portion 121 and the second welding portion 211 are welded. Since the spring support 600 and the nozzle 200 are designed as a split type, the nozzle top core 400 is pushed upward by the spring 500, and the thrust of the spring 500 will be transmitted to the elastic seal 300. The first snap-fit ​​structure 621 and the second snap-fit ​​structure 340 are provided to ensure that the nozzle top core 400 will not push the elastic seal 300 upward, thereby ensuring the sealing effect of the elastic seal 300. Therefore, the ink cartridge can prevent the spring support 600 from being shattered by ultrasound and avoid damage to the internal structure of the ink cartridge, while ensuring the airtightness of the ink cartridge. Further, the first snap-fit ​​structure 621 is a snap-fit ​​through hole, and the second snap-fit ​​structure 340 is a snap-fit ​​protrusion, which is elastically snap-fitted with the snap-fit ​​through hole to achieve relative fixation between the elastic seal 300 and the spring support 600. Furthermore, the bottom of the clamping protrusion has an elastic conical clamping portion 341 which is larger at the top and smaller at the bottom. The outer diameter of the upper end of the elastic conical clamping portion 341 when not subject to external force is larger than the inner diameter of the clamping through hole. When the elastic conical clamping portion 341 is inserted toward the clamping through hole, the elastic conical clamping portion 341 is squeezed by the clamping through hole and will shrink and pass through the clamping through hole. After passing through the clamping through hole, the elastic conical clamping portion 341 returns to its original state. When pushed upward by the nozzle top core 400, the elastic conical clamping portion 341 can be clamped on the lower end surface of the overlap portion 620 and will not pass through the clamping through hole, thereby ensuring the relative fixation between the elastic seal 300 and the spring support 600, and preventing the elastic seal 300 from being pushed upward and affecting the air tightness.

[0040] Further, refer to Figure 3 and Figure 5 , the ink cartridge also includes a nozzle snap cover 700, which is integrally formed on the top of the nozzle 200. The nozzle snap cover and the nozzle in the prior art are split structures, which are connected by snap-fit. However, the nozzle snap cover is limited by the structure of the ink suction nozzle of the print head. The small nozzle snap cover can only be designed as a structure with multiple perforations and very thin wall thickness. Under the long-term pushing action of the spring, the nozzle snap cover can easily crack and detach from the root of the perforation, causing the ink cartridge to leak ink from the nozzle. The ink cartridge has the nozzle snap cover 700 integrally formed on the top of the nozzle 200, which can effectively avoid the ink leakage problem caused by the breakage of the nozzle snap cover 700. Furthermore, a recovery cotton 800 is installed on the side of the nozzle snap cover 700 to absorb the overflowed ink and prevent the ink from leaking out of the bottle. Further, referring to Figure 4 The ink cartridge further includes a bottle cap 900 , which is sleeved on the outer periphery of the nozzle 200 and snap-connected to the lower end of the bottle shoulder 120 of the ink bottle 100 .

[0041] Embodiment 2

[0042] Embodiment 2 of the present invention provides a production process for an ink cartridge, which is used to produce the above-mentioned ink cartridge, and includes the following steps:

[0043] Step S100, providing the ink bottle 100, the nozzle 200 and the elastic sealing member 300 required for production;

[0044] Step S200, installing the elastic sealing member 300 at the bottle mouth 110;

[0045] Step S300, sleeve the sleeve portion 210 of the nozzle 200 onto the outer periphery of the elastic sealing member 300 and the bottle mouth 110, so that the elastic sealing member 300 is sealedly connected to the bottle mouth 110 and the nozzle 200;

[0046] Step S400: The second welding portion 211 at the bottom of the nozzle 200 is fixed to the first welding portion 121 of the shoulder 120 of the ink bottle 100 by welding.

[0047] Embodiment 3

[0048] Embodiment 3 of the present invention provides a production process of an ink cartridge, which is used to produce the above-mentioned ink cartridge, and includes the following steps:

[0049] Step S100, providing the ink bottle 100, the nozzle 200, the elastic sealing member 300, the nozzle top core 400, the spring 500 and the spring support 600 required for production;

[0050] Step S200, installing the nozzle top core 400, the spring 500 and the spring support 600 in the bottle mouth 110, and then installing the elastic seal 300. When installing the elastic seal 300, insert the second buckle structure 340 at the lower end of the elastic seal 300 into the first buckle structure 621 of the spring support 600, so that the elastic seal 300 and the second buckle structure 340 are relatively fixed;

[0051] Step S300, sleeve the sleeve portion 210 of the nozzle 200 on the outer periphery of the elastic sealing member 300 and the bottle mouth 110, sleeve the first sleeve hole 212 on the outer periphery of the main body 310 and the bottle mouth 110, sleeve the second sleeve hole 220 on the outer periphery of the first sealing portion 320, seal the lower end surface and the upper end surface of the main body 310 against the upper end surface of the bottle mouth 110 and the top wall of the first sleeve hole 212, respectively, and seal the upper end surface of the first sealing portion 320 against the top wall of the second sleeve hole 220;

[0052] Step S400: The second welding portion 211 at the bottom of the nozzle 200 is fixed to the first welding portion 121 of the shoulder 120 of the ink bottle 100 by welding.

[0053] The production process of the present invention can adopt a relatively low-difficulty welding process to produce an ink cartridge that does not leak ink, thereby reducing the cost of the ink cartridge.

[0054] It should be noted that in the description of the present invention, if there are any orientation descriptions, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are all based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation on the present invention.

[0055] In the description of the present invention, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0056] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0057] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An ink cartridge, characterized in that: The invention comprises an ink bottle (100), a nozzle (200) and an elastic sealing member (300), wherein the ink bottle (100) comprises a bottle mouth (110) and a bottle shoulder (120), wherein the bottle mouth (110) protrudes upward from the bottle shoulder (120), and the bottle shoulder (120) is provided with a first welding portion (121), and the lower end of the nozzle (200) is provided with a sleeve portion (210), and the bottom of the sleeve portion (210) is provided with a second welding portion (211), and the sleeve portion (210) is sleeved on the outer periphery of the bottle mouth (110), and the elastic sealing member (300) is sealingly connected to the bottle mouth (110) and the nozzle (200), and the first welding portion (121) and the second welding portion (211) are fixed by welding.

2. The ink cartridge according to claim 1, characterized in that: The elastic sealing member (300) comprises a main body (310), a first sealing portion (320) and a second sealing portion (330), wherein the first sealing portion (320) and the second sealing portion (330) are respectively integrally formed at the upper end and the lower end of the main body (310); A first sleeve connection hole (212) is formed in the sleeve connection portion (210), and the first sleeve connection hole (212) is sleeved on the outer periphery of the main body portion (310) and the bottle mouth (110); a second sleeve connection hole (220) is formed on the upper portion of the nozzle (200) and is communicated with the first sleeve connection hole (212), and the second sleeve connection hole (220) is sleeved on the outer periphery of the first sealing portion (320); The lower end surface and the upper end surface of the main body portion (310) are respectively sealed and fitted to the upper end surface of the bottle mouth (110) and the top wall of the first sleeve hole (212); the upper end surface of the first sealing portion (320) is sealed and fitted to the top wall of the second sleeve hole (220); and the outer peripheral surface of the second sealing portion (330) is sealed and fitted to the inner peripheral surface of the bottle mouth (110).

3. The ink cartridge according to claim 2, characterized in that: The top wall of the first sleeve hole (212) is provided with an annular sealing protrusion (2121).

4. The ink cartridge according to claim 1, characterized in that: The nozzle top core (400), a spring (500) and a spring support (600) are also included. The spring support (600) is installed in the bottle mouth (110). The spring (500) is installed in the spring support (600). The upper and lower ends of the spring (500) respectively abut against the nozzle top core (400) and the spring support (600). The upper end of the nozzle top core (400) is inserted into the elastic sealing component (300).

5. The ink cartridge according to claim 4, characterized in that: A supporting step (111) is provided in the bottle mouth (110); the spring support (600) comprises a mounting portion (610) and a lap portion (620); the mounting portion (610) is inserted into the bottle mouth (110) and used for mounting the spring (500); and the lap portion (620) is lapped on the supporting step (111); The overlapping portion (620) is provided with a first snap-fit ​​structure (621), and the lower portion of the elastic sealing component (300) is provided with a second snap-fit ​​structure (340), and the second snap-fit ​​structure (340) and the first snap-fit ​​structure (621) are snap-fitted to each other.

6. The ink cartridge according to claim 1, characterized in that: It also includes a nozzle buckle cover (700), wherein the nozzle buckle cover (700) is integrally formed on the top of the nozzle (200).

7. The ink cartridge according to claim 1, characterized in that: It also includes a bottle cap (900), which is sleeved on the outer periphery of the nozzle (200) and snap-connected to the lower end of the bottle shoulder (120) of the ink bottle (100).

8. The ink cartridge according to claim 1, characterized in that: The second welding portion (211) is an annular protrusion that is larger at the top and smaller at the bottom.

9. A production process for an ink cartridge, characterized in that: The method for producing the ink cartridge according to any one of claims 1 to 8 comprises the following steps: Step S100, providing an ink bottle (100), a nozzle (200) and an elastic sealing member (300) required for production; Step S200, installing the elastic sealing member (300) at the bottle mouth (110); Step S300, sleeve the sleeve portion (210) of the nozzle (200) onto the outer periphery of the elastic sealing member (300) and the bottle mouth (110), so that the elastic sealing member (300) is sealedly connected to the bottle mouth (110) and the nozzle (200); Step S400: The second welding portion (211) at the bottom of the nozzle (200) is fixed to the first welding portion (121) of the shoulder (120) of the ink bottle (100) by welding.

10. The production process of the ink cartridge according to claim 9, characterized in that: In step S100, a nozzle top core (400), a spring (500) and a spring support (600) required for production are also provided; In step S200, the nozzle top core (400), the spring (500) and the spring support (600) are first installed in the bottle mouth (110), and then the elastic seal (300) is installed. When installing the elastic seal (300), the second buckle structure (340) at the lower end of the elastic seal (300) is buckled onto the first buckle structure (621) of the spring support (600); Step S300 includes the following process: the nozzle (200) is sleeved on the outer periphery of the elastic sealing member (300) and the bottle mouth (110), and the first sleeve hole (212) is sleeved on the outer periphery of the main body (310) and the bottle mouth (110), the second sleeve hole (220) is sleeved on the outer periphery of the first sealing portion (320), the lower end surface and the upper end surface of the main body (310) are respectively sealed and fitted to the upper end surface of the bottle mouth (110) and the top wall of the first sleeve hole (212), and the upper end surface of the first sealing portion (320) is sealed and fitted to the top wall of the second sleeve hole (220).

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