A leak-proof ball-point pen with a nano-coating and a sealing structure in cooperation and a preparation method thereof

Abstract

This invention belongs to the technical field of ballpoint pens, specifically relating to a leak-proof ballpoint pen with a synergistic nano-coating and sealing structure. The pen includes a barrel with a cap threaded to its upper end. A refill is inserted into the lower end of the cap and runs through the pen barrel. A switch assembly is provided between the cap and the refill, controlling the extension and retraction of the refill's lower end within the lower end of the barrel, and also controlling the connection between the upper end of the refill and the outside. A fixing assembly is provided between the refill and the switch assembly. A mounting base drives a connecting tube to slide within a control head, precisely controlling the airflow at the upper end of the refill. When the refill is retracted, the air vent at the upper end is closed, creating a negative pressure that balances with the weight of the ink, preventing leakage and protecting the lower end of the refill. When the refill is extended, the air vent at the upper end aligns with the air, allowing the ink to flow smoothly under its own weight, ensuring normal use.

Description

Technical Field

[0001] This invention belongs to the technical field of ballpoint pens, specifically relating to a leak-proof ballpoint pen with a synergistic combination of nano-coating and sealing structure, and its preparation method. Background Technology

[0002] Currently, most traditional ballpoint pens use a single physical sealing method, which leaves the tip of the pen refill unsealed. Under the influence of gravity, the ink will continue to flow to the pen tip, causing ink leakage when the pen is not in use. When the pen refill is pushed out, if the air passage is not smooth, ink may be interrupted.

[0003] To address the aforementioned issues, this patent proposes a leak-proof neutral pen that is collaboratively leak-proof, self-adaptive, and easy to operate, thereby solving the technical problems mentioned above. Summary of the Invention

[0004] The purpose of this invention is to provide a leak-proof ballpoint pen with a synergistic combination of nano-coating and sealing structure, and its preparation method, in order to solve the problem mentioned in the background art that traditional ballpoint pens mostly use a single physical sealing method and are prone to ink leakage when not in use.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a leak-proof gel pen with a nano-coating and sealing structure, comprising a pen barrel, a pen cap threadedly connected to the upper end of the pen barrel, and a pen refill inserted through the pen barrel into the lower end of the pen cap. A switch assembly is provided between the pen cap and the pen refill, and the switch assembly can control the extension and retraction of the lower end of the pen refill inside the lower end of the pen barrel, and can also control the connection between the upper end of the pen refill and the outside. A fixing assembly is provided between the pen refill and the switch assembly, and can fix the pen refill inside the lower end of the switch assembly. The fixing assembly can fix pen refills of different thicknesses.

[0006] Preferably, the switch assembly includes a mounting base, and the lower end of the pen cap is slidably connected to a mounting base that is snapped onto the upper end of the pen refill. A sealing air cushion is provided between the pen refill and the mounting base, and a switching connecting pipe is connected to the center of the upper end of the mounting base.

[0007] Preferably, the upper end of the pen cap is threadedly connected to an on / off control head, and an on / off hole is formed vertically through the axis of the on / off control head. The upper end of the on / off connecting tube is slidably connected inside the on / off hole, and multiple sealing rings are provided between the tube and the on / off hole.

[0008] Preferably, multiple external air guide holes are provided on both the upper and lower sides of the inner wall of the switch hole, and the switch hole is connected to the inside of the switch control head through the external air guide holes. A connecting hole is provided on the upper side of the outside of the switch pipe, located on the lower side of the inside of the switch hole, and multiple internal air guide holes are connected between the connecting hole and the inside of the switch pipe.

[0009] Preferably, a "convex" shaped switch groove is provided on the outer wall of the pen cap, and the switch groove is located outside the mounting base and communicates with the lower opening of the pen cap. A switch slide is slidably connected inside the switch groove, and a connecting rod connected to the outer wall of the mounting base is slidably connected to the inner end of the switch slide.

[0010] Preferably, a plurality of locking springs are provided between the mounting base and the switch slide, and locking side plates are connected to both sides of the switch slide, and teeth and grooves that can mesh with each other are provided between the switch slide and the locking side plates.

[0011] Preferably, the fixing component includes a limiting outer sleeve, the mounting base is fitted with a limiting outer sleeve that wraps around the upper end of the pen refill, and the limiting outer sleeve is fitted with a limiting inner sleeve, the limiting inner sleeve having multiple telescopic seats radially connected inside.

[0012] Preferably, a positioning frame connected to the inner side of the upper end of the limiting sleeve is snapped into the upper opening of the telescopic seat, and a fixing clamp is slidably connected to the inner end of the telescopic seat along the radial direction of the limiting inner sleeve.

[0013] Preferably, a plurality of positioning posts are connected to the inner wall of the inner end of the fixing block, and the top of each of the positioning posts is hemispherical. Each of the positioning posts is fitted with a clamping spring located between the limiting outer sleeve and the fixing block.

[0014] A method for preparing a leak-proof ballpoint pen with a synergistic combination of nano-coating and sealing structure, characterized by the following steps: Step 1: Nano-coating. Apply the leak-proof nano-coating to the inner wall, joints, and rotating parts of the pen refill. Then, assemble the pen refill using pressure bonding and fill the inside of the assembled pen refill with ink. Step 2: Assemble the ballpoint pen. Assemble the fixing component, switch component, and pen cap together, and fix the pen refill to the lower end of the switch component. Finally, assemble the pen cap and pen refill with the pen barrel to complete the assembly.

[0015] Compared with existing technologies, this invention provides a leak-proof ballpoint pen with synergistic nano-coating and sealing structure, and its preparation method, which has the following beneficial effects: 1. This invention applies a nano-coating to the inner wall of the pen refill, the connection between the ink barrel and the metal pen tip, and between the metal pen tip and the ball bearing. Combined with an injection molding assembly process, this effectively blocks ink penetration and prevents ink leakage.

[0016] 2. This invention uses a mounting base to drive the on / off connecting tube to slide within the on / off control head, precisely controlling the air passage at the upper end of the pen refill. When the pen refill is retracted, the air hole at the upper end of the pen refill is closed, forming a negative pressure that balances the weight of the ink, preventing ink leakage, and the lower end of the pen refill is retracted into the pen barrel for protection. When the pen refill is extended, the air hole at the upper end of the pen refill is aligned and connected to the air, allowing the ink to flow smoothly under its own weight, ensuring normal use.

[0017] 3. The switch slide and locking side plate of the present invention can be locked by teeth and grooves under the action of locking spring, and fix the position of the switch slide, thereby fixing the switch position of the pen refill, preventing the pen refill from moving accidentally. The external rod also functions as an operating lever and a hook, improving the convenience of use.

[0018] 4. The fixing block of the present invention guides the pen refill through the arc surface for insertion. The clamping spring can cooperate with the positioning post to elastically clamp pen refills of different thicknesses. The positioning frame and the limiting inner sleeve are designed to prevent rotation and avoid damage to the spring, ensuring clamping stability and compatibility with pen refills of different thicknesses. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the ballpoint pen of the present invention.

[0020] Figure 2 This is a schematic diagram of the neutral pen exploding according to the present invention.

[0021] Figure 3 This is a schematic diagram of the connection structure between the switch assembly and the fixing assembly of the present invention.

[0022] Figure 4 This is a schematic diagram of the pen cap connection structure of the present invention.

[0023] Figure 5 This is a schematic diagram of the mounting base connection structure of the present invention.

[0024] Figure 6 This is a schematic diagram of the fixed component connection structure of the present invention.

[0025] Figure 7 This is a three-dimensional cross-sectional structural diagram of the fixing component of the present invention.

[0026] Figure 8 This is an exploded view of the fixing component of the present invention.

[0027] Figure 9 This is a schematic diagram of the three-dimensional cross-sectional structure of the fixing block of the present invention.

[0028] In the diagram: 1. Pen barrel; 2. Pen cap; 3. Pen refill; 4. Mounting base; 5. Sealing air cushion; 6. On / off connecting pipe; 7. On / off control head; 8. On / off hole; 9. External air vent; 10. Connecting hole; 11. Internal air vent; 12. Switch slide groove; 13. Switch slide seat; 14. Connecting rod; 15. Locking spring; 16. Locking side plate; 17. External hanging rod; 18. Limiting outer sleeve; 19. Limiting inner sleeve; 20. Telescopic seat; 21. Positioning frame; 22. Fixing clamp; 23. Positioning post; 24. Clamping spring. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] This invention provides, for example Figures 1-9 The illustration shows a leak-proof gel pen with a nano-coating and sealing structure. It includes a pen barrel 1, a pen cap 2 threadedly connected to the upper end of the barrel 1, and a pen refill 3 inserted through the pen barrel 1 and fastened to the lower end of the cap 2. The tip, ball, ends, and inner wall of the pen refill 3 are coated with a nano-coating. A switch assembly is provided between the cap 2 and the pen refill 3, which controls the extension and retraction of the lower end of the pen refill 3 within the lower end of the barrel 1, and also controls the connection between the upper end of the pen refill 3 and the outside. A fixing component is provided between the pen and the switch assembly, and the pen can be fixed inside the lower end of the switch assembly by the fixing component. The fixing component can fix pen refills 3 of different thicknesses. During the preparation of the ballpoint pen, a nano-layer for leak prevention is applied to the inner wall, connection and metal rotation of the pen refill 3, such as the inner wall of the ink rod, the connection between the inner wall of the ink rod and the metal pen tip, and the connection between the metal pen tip and the internal ball. Then, the inner wall of the ink rod and the metal pen tip are assembled together by pressure bonding. Finally, ink is injected into the pen refill 3.

[0031] Furthermore, during the assembly of the ballpoint pen, the fixing component is first snapped into the lower end of the switch component, then the switch component is installed into the pen cap 2, the pen refill 3 is fixed to the lower end of the switch component, and finally the pen refill 3 is inserted into the pen barrel 1, and the pen cap 2 is installed into the upper end of the pen barrel 1 to complete the assembly.

[0032] Furthermore, during the retraction of the ballpoint pen, the switch assembly pushes the pen refill 3 upwards inside the pen barrel 1 and pen cap 2, allowing the lower end of the pen refill 3 to be retracted into the lower end of the pen barrel 1 for protection and fixing the position of the pen refill 3. At the same time, the upper end of the pen refill 3 is sealed, so that when the ink inside the pen refill 3 flows downwards under the action of gravity, the sealed top of the pen refill 3 will generate negative pressure and prevent the ink from continuing to flow out, so that the lower end of the metal pen tip of the pen refill 3 will not produce ink, thus preventing the ink inside the pen refill 3 from leaking.

[0033] Furthermore, during the use of the ballpoint pen, the lower end of the pen tip 3 is pushed out from the lower end of the pen barrel 1 by the switch assembly, and the position of the pen tip 3 is fixed. At the same time, the upper end of the pen tip 3 is connected to the outside, allowing external air to smoothly enter the upper end of the pen tip 3, so that the ink inside the pen tip 3 can flow downward under the action of gravity, allowing the lower end of the metal tip of the pen tip 3 to dispense ink normally and be used.

[0034] like Figures 1-5 As shown, the switch assembly includes a mounting base 4. The lower end of the pen cap 2 is slidably connected to the mounting base 4, which is snapped onto the upper end of the pen refill 3. A sealing gasket 5 is provided between the pen refill 3 and the mounting base 4. A switching connecting pipe 6 is connected to the center of the upper end of the mounting base 4. A switching control head 7 is threadedly connected to the upper end of the pen cap 2. A switching hole 8 extends vertically along the axis of the switching control head 7. The upper end of the switching connecting pipe 6 is slidably connected inside the switching hole 8, and multiple sealing rings are provided between it and the switching hole 8. Multiple external air guide holes 9 are provided on both the upper and lower sides of the inner wall of the switching hole 8, and these external air guide holes 9 communicate with the inside of the switching control head 7. A connecting hole 10 is provided on the upper outer side of the switching connecting pipe 6, located on the lower inner side of the switching hole 8. Multiple internal air guide holes 11 communicate between the connecting hole 10 and the inside of the switching connecting pipe 6. A "convex"-shaped switch groove 12 is provided on the outer wall of the pen cap 2, and the switch groove 12 is located outside the mounting base 4 and communicates with the opening at the lower end of the pen cap 2. A switch slide 13 is slidably connected inside the switch slide groove 12, and a connecting rod 14 connected to the outer wall of the mounting base 4 is slidably connected to the inner end of the switch slide 13. During the process of controlling the on / off state of the upper end of the pen refill 3, the mounting base 4 slides upward, and the on / off connecting tube 6 slides upward inside the on / off hole 8, so that the on / off connecting tube 6 completely blocks the inside of the on / off hole 8 and blocks the multiple external air guide holes 9 on the upper side of the inner wall of the on / off hole 8. At the same time, the connecting hole 10 is staggered from the multiple external air guide holes 9 on the upper and lower sides, so that the on / off control head 7 is not connected to the outside, and the on / off connecting tube 6 is not connected to the inside of the on / off control head 7. Since the upper end of the pen refill 3 is sealed to the mounting base 4 through the sealing air pad 5 and connected to the on / off connecting tube 6, while the on / off connecting tube 6 is not connected to the on / off control head 7, and the on / off control head 7 is not connected to the outside, the upper end of the pen refill 3 is not connected to the outside, thereby blocking the upper end of the pen refill 3 and preventing the ink from flowing out of the pen refill 3.

[0035] At the same time, the mounting base 4 drives the pen refill 3 to move upward inside the pen barrel 1 and pen cap 2, and retracts the metal pen tip at the lower end of the pen refill 3 into the lower end of the pen barrel 1 for protection, so as to prevent the metal pen tip at the lower end of the pen refill 3 from being accidentally bumped.

[0036] Conversely, the mounting base 4 is slid downwards, causing the connecting tube 6 to slide downwards inside the connecting hole 8. This allows the upper end of the connecting tube 6 to slide into the connecting hole 8, exposing multiple external air guide holes 9 on the upper side of the inner wall of the connecting hole 8. At the same time, the connecting hole 10 is aligned with the multiple external air guide holes 9 on the lower side, allowing the on / off control head 7 to communicate with the outside through the multiple external air guide holes 9 on the upper side of the inner wall of the connecting hole 8. The connecting tube 6 can also communicate with the inside of the on / off control head 7 through the multiple external air guide holes 9, the connecting hole 10, and the multiple internal air guide holes 11 on the lower side of the inner wall of the connecting hole 8. This allows the upper end of the pen refill 3 to communicate with the outside, enabling the lower end of the metal tip of the pen refill 3 to dispense ink normally.

[0037] like Figures 3-5 As shown, multiple locking springs 15 are provided between the mounting base 4 and the switch slide 13. Locking side plates 16 are connected to both sides of the switch slide 13, and teeth and grooves that can interlock are provided between the switch slide groove 12 and the locking side plates 16. An external hanging rod 17 located outside the pen barrel 1 is connected to the lower end of the switch slide 13. This rod can be used to extend the switch slide 13, making it easier to slide, and can also be used as a hook. During the up-and-down movement of the pen refill 3, the mounting base 4 is connected to the switch slide 13 via the connecting rod 14 and can be elastically connected to the switch slide 13 via multiple locking springs 15. At this time, pressing the switch slide 13 inward causes the locking side plates 16 on both sides to move inward. Disengaging from the switch slide 12 allows the switch slide 13 and locking side plate 16 to slide smoothly up and down inside the switch slide 12. The connecting rod 14 drives the mounting base 4 to slide up and down together, controlling the extension and retraction of the pen refill 3. When the mounting base 4 slides to the uppermost or lowermost side, the switch slide 13 is released. Under the action of multiple locking springs 15, the switch slide 13 drives the locking side plates 16 on both sides to fit tightly against the inner wall of the outer end of the switch slide 12. Through tooth and groove meshing, the positions of the switch slide 13 and locking side plate 16 are fixed, thereby fixing the position of the mounting base 4, and then fixing the position of the pen refill 3, ensuring the stability of the pen refill 3 after extension and retraction.

[0038] like Figures 6-9As shown, the fixing component includes a limiting outer sleeve 18. The limiting outer sleeve 18, which wraps around the upper part of the pen refill 3, is snapped inside the mounting base 4. A limiting inner sleeve 19 is snapped inside the limiting outer sleeve 18. Multiple telescopic seats 20 are radially connected inside the limiting inner sleeve 19. A positioning frame 21 connected to the inner side of the upper end of the limiting outer sleeve 18 is snapped at the upper opening of the telescopic seat 20. A fixing clamp 22 is slidably connected to the inner end of the telescopic seat 20 along the radial upward of the limiting inner sleeve 19. The lower side of the inner end of the fixing clamp 22 is arc-shaped. The inner wall of the inner end of the fixing clamp 22 is... Multiple positioning posts 23 are connected, and the top of each positioning post 23 is hemispherical. Each positioning post 23 is fitted with a clamping spring 24 located between the limiting sleeve 18 and the fixing block 22. During the assembly of the pen refill 3, the sealing air pad 5 is placed inside the mounting base 4, and then the fixing component is installed inside the mounting base 4. The fixing component is fixed by the retaining ring on the outer side of the lower end of the limiting inner sleeve 19 and the retaining groove on the inner wall of the lower end opening of the mounting base 4, and the sealing air pad 5 is limited inside the mounting base 4.

[0039] At this time, the upper end of the pen refill 3 is inserted into the fixing component. Since the lower side of the inner end of the multiple radially arranged fixing blocks 22 inside the fixing component is arc-shaped and elastically connected to the telescopic seat 20 by multiple clamping springs 24, the upper end of the pen refill 3 can be squeezed between the multiple fixing blocks 22 through the arc surface of the multiple fixing blocks 22, and clamped between the multiple fixing blocks 22 under the action of the multiple clamping springs 24, thereby fixing the pen refill 3. The upper end of the pen refill 3 can be sealed with the mounting seat 4 through the sealing air pad 5 and connected to the on / off connecting pipe 6.

[0040] The fixing block 22, which is elastically connected inside the telescopic base 20, can fix pen refills 3 of different thicknesses by telescopic movement, thereby improving the applicability of the ballpoint pen. During the telescopic movement of the fixing block 22, the clamping spring 24 can be limited by the positioning post 23 and the clamping spring 24, and can be guided by the telescopic movement of the hemispherical outer wall at the top of the positioning post 23, so that the positioning post 23 will not jam with the clamping spring 24, and the fixing block 22 can be telescopically moved smoothly inside the telescopic base 20.

[0041] In addition, the upper end of the telescopic seat 20 can be blocked by the positioning frame 21, and the inner limiting sleeve 19 can be positioned with the outer limiting sleeve 18 through the telescopic seat 20 and the positioning frame 21, so as to prevent the inner limiting sleeve 19 from rotating inside the outer limiting sleeve 18 and prevent the rotation from damaging the clamping spring 24 that is attached to the inside of the outer limiting sleeve 18.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A leak-proof gel pen with a nano-coating and sealing structure, comprising a pen barrel (1), wherein a pen cap (2) is threadedly connected to the upper end of the pen barrel (1), and a pen core (3) is inserted through the pen barrel (1) at the lower end of the pen cap (2), characterized in that: A switch assembly is provided between the pen cap (2) and the pen refill (3), and the lower end of the pen refill (3) can be extended and retracted inside the lower end of the pen barrel (1) through the switch assembly, and the upper end of the pen refill (3) can be switched on and off from the outside through the switch assembly. A fixing component is provided between the pen refill (3) and the switch assembly, and the pen refill (3) can be fixed inside the lower end of the switch assembly by the fixing component. The fixing component can fix pen refills (3) of different thicknesses.

2. A leakproof ballpoint pen in cooperation with a nano-coating and sealing structure according to claim 1, characterized in that, The switch assembly includes a mounting base (4), and the lower end of the pen cap (2) is slidably connected to the mounting base (4) which is snapped onto the upper end of the pen refill (3). A sealing gasket (5) is provided between the pen refill (3) and the mounting base (4). A switching pipe (6) is connected to the center of the upper end of the mounting base (4).

3. The leak-proof gel pen with a synergistic nano-coating and sealing structure as described in claim 2, characterized in that, The upper end of the pen cap (2) is threadedly connected to a switch control head (7), and a switch hole (8) is passed through the axis of the switch control head (7). The upper end of the switch connecting pipe (6) is slidably connected inside the switch hole (8), and multiple sealing rings are provided between the switch pipe (6) and the switch hole (8).

4. The leak-proof gel pen with a synergistic nano-coating and sealing structure as described in claim 3, characterized in that, Multiple external air guide holes (9) are provided on both the upper and lower sides of the inner wall of the switch hole (8), and are connected to the inside of the switch control head (7) through the external air guide holes (9). A connecting hole (10) located on the lower side of the inside of the switch hole (8) is provided on the upper side of the outside of the switch pipe (6), and multiple internal air guide holes (11) are connected between the connecting hole (10) and the inside of the switch pipe (6).

5. A leak-proof gel pen with a synergistic nano-coating and sealing structure as described in claim 4, characterized in that, The outer wall of the pen cap (2) is provided with a "convex" shaped switch groove (12), and the switch groove (12) is located outside the mounting base (4) and communicates with the lower opening of the pen cap (2). The switch groove (12) is slidably connected to a switch slide (13), and the inner end of the switch slide (13) is slidably connected to a connecting rod (14) connected to the outer wall of the mounting base (4).

6. The leak-proof gel pen with a synergistic nano-coating and sealing structure as described in claim 5, characterized in that, Multiple locking springs (15) are provided between the mounting base (4) and the switch slide (13). Locking side plates (16) are connected to both sides of the switch slide (13), and teeth and grooves that can mesh with each other are provided between the switch slide (12) and the locking side plates (16).

7. A leak-proof gel pen with a synergistic nano-coating and sealing structure as described in claim 2, characterized in that, The fixing component includes a limiting outer sleeve (18), the mounting base (4) is fitted with a limiting outer sleeve (18) that wraps around the upper part of the pen refill (3), and the limiting outer sleeve (18) is fitted with a limiting inner sleeve (19), and the limiting inner sleeve (19) is radially connected to a plurality of telescopic seats (20).

8. A leak-proof gel pen with a synergistic nano-coating and sealing structure as described in claim 7, characterized in that, The upper opening of the telescopic seat (20) is fitted with a positioning frame (21) connected to the inner side of the upper end of the limiting sleeve (18), and the inner end of the telescopic seat (20) is slidably connected to a fixing clamp (22) along the radial direction of the limiting inner sleeve (19).

9. A leak-proof gel pen with a synergistic nano-coating and sealing structure as described in claim 8, characterized in that, Multiple positioning posts (23) are connected to the inner wall of the inner end of the fixed clamping block (22), and the top of each of the multiple positioning posts (23) is hemispherical. Each of the multiple positioning posts (23) is fitted with a clamping spring (24) located between the limiting outer sleeve (18) and the fixed clamping block (22).

10. A method for preparing a leak-proof gel pen with a synergistic nano-coating and sealing structure according to any one of claims 1-9, characterized in that, The steps are as follows: Step 1: Nano-coating. Apply the nano-coating for leak prevention to the inner wall, connection and metal rotation of the pen refill (3), and then assemble the pen refill (3) by pressure bonding. Then fill the inside of the assembled pen refill (3) with ink. Step 2: Neutral pen assembly. Assemble the fixing component, switch component and pen cap (2) together, fix the pen refill (3) to the lower end of the switch component, and finally assemble the pen cap (2) and pen refill (3) with the pen barrel (1) to complete the assembly.

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