A writing instrument with a smooth nib

Abstract

The utility model relates to pen tongue technical field, and disclose a kind of writing smooth pen tongue, including pen tongue body and its inside ink supply system and air pressure balance system, ink supply system adopts by main ink supply channel and three-dimensional auxiliary capillary grid constitute multistage composite capillary structure, air pressure balance system includes air pressure balance cavity, air guide hole, air inlet and air passage, pen tongue body includes kiss part, ink guide body and connecting part, kiss part, ink guide body and connecting part are fixedly connected between, by main ink supply channel and three-dimensional auxiliary capillary grid constitute multistage composite capillary structure, realized the rapid delivery of ink, storage and intelligent buffer adjustment, ensure the continuity and stability of writing, and by adopting an independent air pressure balance cavity that inner wall is coated with hydrophobic material, communicate with pen barrel through slight air passage, can gently balance internal and external air pressure, effectively prevent ink leakage.

Description

Technical Field

[0001] This utility model relates to the field of fountain pen feed technology, specifically to a fountain pen feed that allows for smooth writing. Background Technology

[0002] Fountain pens, also known as fountain pens, are one of the most widely used writing tools. The core of a fountain pen's writing experience lies in the stability of its ink supply system.

[0003] Currently, commonly used fountain pen feeds may experience ink leakage and uneven ink supply due to air pressure during the ink guiding process. For example, CN 217495668 U discloses a fountain pen feed ink supply structure, which includes an ink inlet groove, a fixing hole groove on the right side of the ink inlet groove, square ink storage grooves at both the upper and lower ends of the right side of the ink inlet groove, circular ink storage grooves at both the upper and lower ends of the right end of the ink inlet groove, an arc-shaped triangular ink storage groove at the right end of the ink inlet groove, an exhaust channel on the back of the ink inlet groove, a second ink storage fin on the left side of the outer surface of the ink inlet groove, and a first ink storage fin on the right side of the outer surface of the ink inlet groove.

[0004] As can be seen from the above-disclosed scheme, the square ink reservoir, round ink reservoir, ink guide groove, arc-triangular ink reservoir, second ink fin, and first ink fin of the fountain pen cannot form a smooth three-dimensional ink supply system. When writing quickly or starting to write, the ink may not be able to keep up in time due to surface tension or inertia, resulting in ink breaks and blanking. When the writing pressure, angle, and speed change, the ink flow regulation is not good, sometimes too little (dry) and sometimes too much, resulting in uneven ink supply. Furthermore, when the temperature and air pressure change or when carrying the pen, the air in the ink cartridge expands, forcing the ink to seep out from the gaps in the nib, causing stains. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model provides a fountain pen feed that writes smoothly, so as to solve the problems of easy ink leakage and unstable ink supply of existing fountain pen feeds.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pen feed for smooth writing, comprising a feed body and an internal ink supply system and air pressure balance system. The ink supply system adopts a multi-level composite capillary structure composed of a main ink supply channel and a three-dimensional auxiliary capillary mesh. The air pressure balance system includes an air pressure balance cavity, an air guide hole, an air inlet hole, and a ventilation channel. The feed body includes a snout, an ink guide body, and a connecting part, which are fixedly connected. By adopting a multi-level composite capillary structure composed of a main ink supply channel and a three-dimensional auxiliary capillary mesh, rapid ink delivery, storage, and intelligent buffer adjustment are achieved, ensuring the continuity and stability of writing. Furthermore, by employing an independent air pressure balance cavity with an inner wall coated with a hydrophobic material, which is connected to the pen barrel through a fine ventilation channel, the internal and external air pressure can be smoothly balanced, effectively preventing ink leakage.

[0007] Preferably, the main ink supply channel includes an ink inlet groove and an ink guide groove, which are interconnected. The ink inlet groove is disposed on the surface of the connecting part, and the ink guide groove is disposed on the surface of the nozzle and the ink guide body. The main ink supply channel is a wide and deep straight groove for rapidly and massively supplying ink to meet the needs of continuous writing and large-character writing.

[0008] Preferably, the three-dimensional auxiliary capillary mesh includes several ink storage tanks, with grooves fixedly connected between adjacent ink storage tanks, and connecting holes opened between the ink storage tanks and the ink guide grooves. The three-dimensional auxiliary capillary mesh can store a small amount of spare ink like a sponge. When the ink supply in the main channel is temporarily insufficient, the stored spare ink can be replenished immediately to eliminate bleed. When the flow rate in the main channel is too high, it can absorb excess ink to prevent ink accumulation.

[0009] Preferably, the air pressure balancing cavity is located inside the connecting part, and one end of the air guide hole and the air inlet hole are fixedly connected to the inside of the air pressure balancing cavity. The air pressure balancing cavity is independent and not directly connected to the main ink supply channel. It can initially buffer and expand the air inside the pen barrel, so that the high-pressure air will not directly impact the ink, thereby greatly reducing the risk of ink leakage.

[0010] Preferably, the venting channel is disposed on the surface of the ink guide body and the connecting part, and one end of the venting channel is connected to one end of the air guide hole. After the connecting part is connected to the pen barrel, one end of the venting channel is connected to the inside of the pen barrel, which can guide the increased air pressure inside the pen barrel due to temperature rise or vibration into the air pressure balance cavity.

[0011] Preferably, the inner wall of the pressure balancing cavity is coated with a layer of hydrophobic material, which is Teflon coating. This effectively prevents ink from accidentally entering the pressure balancing cavity due to capillary action during pressure balancing, thus blocking the ventilation channel and ensuring its long-term effectiveness.

[0012] Preferably, the pen feed body is injection molded from hydrophilic engineering plastic, which is polyoxymethylene, to ensure that the pen feed body has excellent capillary ink guiding performance.

[0013] Compared with the prior art, this utility model provides a pen feed that writes smoothly, and has the following beneficial effects: By employing a multi-level composite capillary structure consisting of a main ink supply channel and a three-dimensional auxiliary capillary mesh, rapid ink delivery, storage, and intelligent buffering adjustment are achieved, ensuring the continuity and stability of writing. Furthermore, by using an independent air pressure balancing cavity with an inner wall coated with hydrophobic material, which is connected to the pen barrel through a fine ventilation channel, the internal and external air pressure can be smoothly balanced, effectively preventing ink leakage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the connecting part structure of this utility model; Figure 3 This is a cross-sectional view of the ink guide structure of this utility model.

[0015] In the diagram: 1. Feed body; 11. Nose; 12. Ink guide body; 13. Connecting part; 14. Ink inlet groove; 15. Ink guide groove; 16. Ink reservoir; 17. Connecting hole; 18. Air pressure balance cavity; 19. Air vent; 20. Air inlet; 21. Ventilation channel. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] This utility model provides a technical solution for a fountain pen feed that writes smoothly, including a feed body 1 and its internal ink supply system and air pressure balance system. The ink supply system adopts a multi-level composite capillary structure composed of a main ink supply channel and a three-dimensional auxiliary capillary mesh. The three-dimensional auxiliary capillary mesh has multiple micropores communicating with the air pressure balance cavity 18. The air pressure balance system includes the air pressure balance cavity 18, an air guide hole 19, an air inlet 20, and a ventilation channel 21. When the air pressure inside the pen increases due to temperature rise or vibration, air first enters the independent air pressure balance cavity 18 through the ventilation channel 21 for initial buffering and expansion. The pressure balance cavity 18 is physically isolated from the main ink supply channel, so the high-pressure air will not directly impact the ink, thereby greatly reducing the risk of ink leakage. Only when the pressure changes continuously will the air slowly exchange gas through the micropores between the pressure balance cavity 18 and the three-dimensional auxiliary capillary mesh, achieving an extremely smooth pressure balance. The pen feed body 1 includes a kiss-shaped part 11, an ink guide 12, and a connecting part 13. The kiss-shaped part 11, the ink guide 12, and the connecting part 13 are fixedly connected. The kiss-shaped part 11, the ink guide 12, and the connecting part 13 can be integrally molded by injection molding, or the kiss-shaped part 11, the ink guide 12, and the connecting part 13 can be injection molded into individual parts and then assembled.

[0018] The main ink supply channel includes an ink inlet trough 14 and an ink guide trough 15, which are interconnected. The ink inlet trough 14 is located on the surface of the connecting part 13, and the ink guide trough 15 is located on the surface of the nozzle 11 and the ink guide body 12. The main ink supply channel is a wide and deep straight channel for rapidly and massively delivering ink to meet the needs of continuous writing and large-character writing. The three-dimensional auxiliary capillary mesh includes several ink storage troughs 16, which are fixedly connected by grooves. A connecting hole 17 is opened between the ink storage troughs 16 and the ink guide troughs 15. The three-dimensional auxiliary capillary mesh can store a small amount of spare ink like a sponge. When the ink supply of the main channel is temporarily insufficient, the stored spare ink can be replenished immediately to eliminate bleed. When the flow rate of the main channel is too large, it can absorb excess ink to prevent ink accumulation.

[0019] The air pressure balancing cavity 18 is located inside the connecting part 13. One end of the air guide hole 19 and the air inlet hole 20 are both fixedly connected to the inside of the air pressure balancing cavity 18. The air pressure balancing cavity 18 is independent and not directly connected to the main ink supply channel. It can initially buffer and expand the air inside the pen barrel, so that the high-pressure air will not directly impact the ink, thereby greatly reducing the risk of ink leakage. The ventilation channel 21 is located on the surface of the ink guide body 12 and the connecting part 13. One end of the ventilation channel 21 is connected to one end of the air guide hole 19. After the connecting part 13 is connected to the pen barrel, one end of the ventilation channel 21 is connected to the inside of the pen barrel, which can introduce the increased air pressure inside the pen barrel due to temperature rise or vibration into the air pressure balancing cavity 18.

[0020] The inner wall of the pressure balancing cavity 18 is coated with a hydrophobic material, which is Teflon coating. This material can effectively prevent ink from accidentally entering the pressure balancing cavity 18 due to capillary action when balancing the pressure, thus blocking the ventilation channel 21 and ensuring its long-term effectiveness. The pen feed body 1 is injection molded from hydrophilic engineering plastic, which is polyoxymethylene, ensuring that the pen feed body 1 has excellent capillary ink guiding performance.

[0021] The working principle of this device is as follows: During writing, ink flows in from the pen barrel through the connecting part 13. Most of the ink flows at high speed to the pen tip through the main ink supply channel, ensuring a sufficient flow. At the same time, some ink is siphoned and stored in the three-dimensional auxiliary capillary mesh. When the writing speed suddenly increases and the ink supply in the main channel is temporarily insufficient, the ink stored in the three-dimensional auxiliary capillary mesh can immediately seep out to replenish it, ensuring continuous writing. When writing is paused and restarted, when the ink at the pen tip dries due to evaporation, the ink stored in the three-dimensional auxiliary capillary mesh can quickly re-wet the pen tip, enabling rapid writing. When the air inside the pen barrel is heated and expands, the high-pressure airflow enters the independent air pressure balance cavity 18 through the ventilation channel 21 at the tail end. Because this air pressure balance cavity 18 is isolated from the ink supply system and its inner wall is made of hydrophobic material, Air is buffered here and exchanges gas slowly with the three-dimensional auxiliary capillary mesh only through well-designed micropores, smoothly balancing the internal and external air pressure and preventing ink from being directly forced out. When using this feed, the pen writes extremely smoothly. The multi-stage capillary system ensures an immediate and stable ink supply in any writing state, effectively eliminating ink breaks, skipping, and ink accumulation. Excellent ink leakage prevention performance: The independent physical air pressure balance cavity design fundamentally solves the problem of ink leakage caused by changes in air pressure and temperature, making it easy to carry and fly. High ink compatibility: This structure has good adaptability to inks of different fluidities and viscosities, ensuring a consistent user experience. Simple structure and easy production: This invention can be manufactured through injection molding, making it suitable for mass production.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fountain pen feed that writes smoothly, comprising a feed body (1) and its internal ink supply system and air pressure balance system, characterized in that: The ink supply system adopts a multi-level composite capillary structure consisting of a main ink supply channel and a three-dimensional auxiliary capillary mesh. The air pressure balance system includes an air pressure balance cavity (18), an air guide hole (19), an air inlet hole (20), and an air passage (21). The pen feed body (1) includes a snout (11), an ink guide body (12), and a connecting part (13). The snout (11), the ink guide body (12), and the connecting part (13) are fixedly connected.

2. The pen feed for smooth writing according to claim 1, characterized in that: The main ink supply channel includes an ink inlet groove (14) and an ink guide groove (15). The ink inlet groove (14) and the ink guide groove (15) are interconnected. The ink inlet groove (14) is disposed on the surface of the connecting part (13), and the ink guide groove (15) is disposed on the surface of the kiss part (11) and the ink guide body (12).

3. The pen feed for smooth writing according to claim 1, characterized in that: The three-dimensional auxiliary capillary mesh includes several ink storage tanks (16), and grooves are fixedly connected between adjacent ink storage tanks (16). A connecting hole (17) is opened between the ink storage tank (16) and the ink guide groove (15).

4. The pen feed for smooth writing according to claim 1, characterized in that: The pressure balance cavity (18) is located inside the connecting part (13), and one end of the air guide hole (19) and the air inlet hole (20) are fixedly connected to the inside of the pressure balance cavity (18).

5. The pen feed for smooth writing according to claim 1, characterized in that: The ventilation channel (21) is provided on the surface of the ink guide body (12) and the connecting part (13), and one end of the ventilation channel (21) is connected to one end of the air guide hole (19).

6. The pen feed for smooth writing according to claim 1, characterized in that: The inner wall of the pressure balance cavity (18) is coated with a hydrophobic material, which is a Teflon coating.

7. The pen feed for smooth writing according to claim 1, characterized in that: The pen tip body (1) is injection molded from hydrophilic engineering plastic, which is polyoxymethylene.

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