Ink supply structure based on direct liquid type relay core structure, pen and assembling method

Abstract

The invention discloses an ink supply structure based on a direct-liquid type relay core structure, a pen and an assembly method. The ink supply structure comprises a pen point, a relay core, an adjuster, a pen holder ink bin and an ink bag. One end of the relay core is communicated with the ink bag and is in contact with ink in the ink bag, and the other end of the relay core is communicated with the pen point; the regulator is sleeved with the pen point, and the relay core is arranged in the regulator in a penetrating mode and connected with the pen point. The pen point, the adjuster and the relay core are all installed in the pen holder ink bin. The regulator comprises coaxial stepped functional zones, namely an ink inlet zone and a pressure stabilizing zone, which are sequentially arranged along the flowing direction of ink, regulating sheets are arranged in the ink inlet zone and the pressure stabilizing zone, the distance between the regulating sheets is gradually increased from the ink inlet zone to the ink guide zone, and the regulating sheets are provided with gas-liquid exchange channels. The problems that an existing ink supply structure cannot dynamically adjust the ink supply amount and ink discharging is not smooth are solved.

Description

Technical Field

[0001] This invention belongs to the field of fountain pen technology, specifically relating to an ink supply structure based on a direct-liquid relay core structure, a fountain pen, and an assembly method. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] The core ink supply structure of thermal erasable fountain pens typically employs a single, continuous ink slit design, directing ink from the ink tank directly to the nib. However, existing ink slits only provide unidirectional ink flow, lacking the ability to regulate ink backflow. When ambient temperature changes or external air pressure fluctuates, a significant pressure difference easily forms between the inside of the ink tank and the external environment. Under this pressure difference, ink continuously seeps out along the ink slit, leading to nib leakage, contamination of the pen cap, and even direct ink dripping. Because the ink is delivered directly to the nib through the ink slit without any throttling or buffering structure, the ink supply cannot be dynamically adjusted according to actual writing conditions such as writing speed and pressure. This results in excessive ink flow at the initial writing stage, easily causing ink buildup or dripping.

[0004] In addition, the gap size of existing ink troughs is usually set too large, which makes it easy for pigment particles or additives in the ink to settle and aggregate. After long-term use, they are very likely to form sediment or clumps inside the ink trough, eventually causing the ink trough to become blocked, resulting in poor ink flow or complete inability to write. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an ink supply structure, a pen, and an assembly method based on a direct-liquid relay core structure, which solves the problems of existing ink supply structures being unable to dynamically adjust the ink supply volume and having poor ink output.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, the present invention provides an ink supply structure based on a direct-liquid relay core structure, comprising: a pen tip, a relay core, an adjuster, a pen barrel ink tank, and an ink sac; one end of the relay core is connected to the ink sac and in contact with the ink in the ink sac, and the other end of the relay core is connected to the pen tip; the pen tip is sleeved on the adjuster, and the relay core passes through the inside of the adjuster and is connected to the pen tip; the pen tip, the adjuster, and the relay core are all installed inside the pen barrel ink tank; The regulator includes coaxial stepped functional zones arranged sequentially along the ink flow direction, namely an ink inlet zone and a voltage stabilizing zone. Adjustment plates are provided in both the ink inlet zone and the voltage stabilizing zone, and the spacing between the adjustment plates gradually increases from the ink inlet zone to the ink guiding zone. The adjustment plates are provided with gas-liquid exchange channels.

[0007] As a further implementation, the gap between the adjusting plates in the ink inlet area is 0.12-0.25mm, the number of adjusting plates is 15-25, and the thickness of the adjusting plates is 0.3-0.5mm; the gap between the adjusting plates in the voltage stabilizing area is 0.25-0.35mm, the number of adjusting plates is 15-25, and the thickness of the adjusting plates is 0.3-0.5mm.

[0008] As a further implementation, the coaxial stepped functional partition is provided with at least two, including at least one ink inlet area and one voltage stabilizing area; the end of the regulator connected to the pen tip is provided with a pen feed.

[0009] As a further implementation, the relay core is made of one of PP porous, PE porous or fiber sintered porous materials, with a porosity ≥35%.

[0010] As a further implementation, the relay core is inserted inside the regulator, which has a central hole and a through hole. The interference fit between the relay core and the central hole of the regulator near the pen tip is ≥0.05mm, and the interference fit between the relay core and the through hole of the regulator is ≥0.04mm. The end of the regulator near the ink sac is fitted with the pen barrel, and the interference fit is ≤0.06mm.

[0011] As a further implementation, the regulator is provided with a gas-liquid exchange channel, the width of which is ≥0.12mm, the bottom of which has a U-shaped structure and an R angle ≥0.05; the difference between the angle of the inner groove at the front end of the regulator's tongue and the taper of the relay core is ≤30°.

[0012] Secondly, the present invention also provides a fountain pen, which is a disposable and refillable direct-liquid thermal erasable fountain pen, comprising an ink supply structure based on a direct-liquid relay core structure, a pen cap mounted on the pen barrel, and a pen moistening device, wherein the pen moistening device is disposed in the pen cap.

[0013] As a further implementation, the inner contour shape and accommodating size of the pen moistener are adapted to the shape and structure of the pen tip.

[0014] As a further implementation, the pen moistening device is made of a porous soft medium material with capillary adsorption properties, and its initial state is dry.

[0015] Thirdly, the present invention also provides a method for assembling a pen, comprising the following steps: Insert the tapered front end of the relay core into the tail hole of the regulator, and use an auxiliary fixture to achieve the appropriate assembly position; through the cooperation of the claw on the pen tip and the pen tongue of the regulator, the end of the pen tip near the ink inlet area contacts the regulating plate. The heat-erasable ink is filled into the ink cartridge through the filling machine, and the ink cartridge is inserted into the end of the grip. The ink is delivered to the front end of the relay core through the gas-liquid exchange channel of the regulator; the front end of the relay core contacts the capillary channel of the pen tip. The pen cap with the built-in ink moistener is fastened to the front of the pen barrel. After fastening, the ink moistener tightly wraps around the writing tip, and the ink is introduced into the ink moistener through capillary action, completing the assembly of the entire ink supply system.

[0016] Compared with the prior art, the advantages and positive effects of this invention are: This invention assembles the pen tip, regulator, and relay core into a core ink supply structure. One end of the relay core contacts and communicates with the ink source inside the ink sac, while the other end passes through the regulator and connects to the pen tip, enabling directional ink flow from the ink source to the pen tip. The pen tip is fitted onto the outside of the regulator, forming a tight fit with the regulator and relay core to ensure ink supply stability. The regulator includes two coaxial stepped functional zones: an ink inlet zone and a voltage stabilizing zone. Adjusting plates are installed in both zones, with the spacing between the plates gradually increasing from the ink inlet zone to the ink guide zone. The coaxial stepped functional zones of the ink inlet and voltage stabilizing zones precisely define the gap and number of adjusting plates. The stepped plate spacing design guides the ink to flow in the correct direction, forming a throttling or buffering structure. This allows for dynamic adjustment of the ink supply based on actual writing conditions such as writing speed and pressure, while reducing ink turbulence and microcapsule impact and accumulation, thus improving the smoothness and stability of ink flow. The regulating plate is equipped with an air-liquid exchange channel, which prevents the accumulation of thermal erasable ink and ensures the air pressure balance inside and outside the ink supply system to prevent ink interruption. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is an overall structural diagram of the ink supply structure of the present invention; Figure 2 This is a structural diagram of the relay core in this invention; Figure 3 This is a structural diagram of the regulator of the present invention; Figure 4 This is a structural diagram of the assembly of the regulator, pen tip, and relay core of the present invention; Figure 5 This is a structural diagram of the regulating plate of the present invention; Figure 6 This is a structural diagram of the pen cap of the present invention; Figure 7 This is a structural diagram of the disposable direct-liquid thermal erasable pen of the present invention; Figure 8 This is a structural diagram of the refillable direct-liquid thermal erasable pen of the present invention.

[0019] In the diagram: 1. Pen tip; 2. Relay core; 3. Regulator; 4. Ink inlet area; 5. Voltage stabilizing area; 6. Adjustment plate; 7. Pen barrel; 8. Ink sac; 9. Pen cap; 10. Damping device; 11. Feed; 12. Gas-liquid exchange channel. Detailed Implementation

[0020] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. Example 1 This embodiment discloses an ink supply structure based on a direct-liquid relay core structure, such as... Figures 1-5 As shown.

[0022] The core ink supply structure of thermal erasable fountain pens typically employs a single, continuous ink slit design, directing ink from the ink tank directly to the nib. However, existing ink slits only provide unidirectional ink flow, lacking the ability to regulate ink backflow. When ambient temperature changes or external air pressure fluctuates, a significant pressure difference easily forms between the inside of the ink tank and the external environment. Under this pressure difference, ink continuously seeps out along the ink slit, leading to nib leakage, contamination inside the cap, and even direct ink dripping. Because the ink is delivered directly to the nib through the slit without any throttling or buffering mechanism, the ink supply cannot be dynamically adjusted according to actual writing conditions such as writing speed and pressure. This deficiency results in excessive ink flow during initial writing, easily causing ink buildup or dripping, affecting not only the clarity of the writing but also increasing residual contamination after erasing, thus reducing writing quality.

[0023] In addition, the gap size of existing ink inlets is usually set too large. A wider gap reduces the flow rate of ink within the inlet, making it easier for pigment particles or additives in the ink to settle and aggregate. Over time, this can easily lead to sedimentation or clumping inside the inlet gap, eventually causing blockage and resulting in poor ink flow or complete inability to write. Frequent clogging increases the product failure rate and shortens the lifespan of the pen.

[0024] This embodiment proposes an ink supply structure based on a direct-liquid relay core structure, such as... Figures 1-5As shown, it includes: a pen tip 1, a relay core 2, an adjuster 3, a pen barrel 7, an ink tank, and an ink sac 8; one end of the relay core 2 is connected to the ink sac 8 and in contact with the ink in the ink sac 8, and the other end of the relay core 2 is connected to the pen tip 1; the pen tip 1 is fitted onto the adjuster 3, and the relay core 2 passes through the inside of the adjuster 3 and is connected to the pen tip 1; the pen tip 1, the adjuster 3, and the relay core 2 are assembled to form a writing assembly, which is installed inside the ink tank of the pen barrel 7.

[0025] Specifically, such as Figure 2 As shown, the relay core 2 is the core of ink flow. One end of it is in contact with and connected to the ink source in the ink sac 8, and the other end is inserted into the regulator 3 and connected to the pen tip 1, so as to realize the directional flow of ink from the ink source to the pen tip 1. The pen tip 1 is sleeved on the outside of the regulator 3, forming a tight assembly relationship with the regulator 3 and the relay core 2 to ensure the stability of ink supply.

[0026] In addition, for this ink supply structure, a pen cap 9 with a built-in pen moisturizer 10 can be set up to work with it. After the pen cap 9 is closed, the pen moisturizer 10 fits precisely with the pen tip 1. Through the capillary action between the pen moisturizer 10 and the pen tip 1, the ink in the pen is absorbed into the pen moisturizer 10, which not only moisturizes the pen tip 1, but also ensures that the color of the ink in the pen moisturizer 10 is consistent with the color of the product ink.

[0027] like Figure 3 As shown, the regulator 3 includes coaxial stepped functional zones arranged sequentially along the ink flow direction, namely an ink inlet zone 4 and a voltage stabilizing zone 5. Both the ink inlet zone 4 and the voltage stabilizing zone 5 are equipped with adjusting plates 6, and the spacing of the adjusting plates 6 gradually increases from the ink inlet zone 4 to the ink guiding zone. Figure 5 As shown, the regulating plate 6 is provided with a gas-liquid exchange channel 12. Its ink inlet area 4 and voltage stabilizing area 5 are coaxially stepped functional partitions, and the gap and number of regulating plates 6 are precisely limited. The stepped plate spacing design guides the ink to flow in the correct direction, reduces ink turbulence and microcapsule impact and accumulation, and improves the smoothness and stability of ink flow.

[0028] like Figure 3 As shown, the gap between the adjusting plates 6 in the ink inlet zone 4 is 0.12-0.25mm, the number of adjusting plates 6 is 15-25, and the thickness of the adjusting plates 6 is 0.3-0.5mm; the gap between the adjusting plates 6 in the voltage stabilizing zone 5 is 0.25-0.35mm, the number of adjusting plates 6 is 15-25, and the thickness of the adjusting plates 6 is 0.3-0.5mm.

[0029] Understandably, the regulator 3 has at least two coaxial stepped functional zones along the ink flow direction: an ink inlet zone 4 and a voltage stabilizing zone 5. The spacing of the regulating plates 6 gradually increases from the ink inlet zone 4 to the voltage stabilizing zone 5. The spacing of the regulating plates 6 in the ink inlet zone 4 is 0.12-0.25 mm, the plate thickness is 0.3-0.5 mm, and the number of plates is 15-25. The spacing of the regulating plates 6 in the voltage stabilizing zone 5 is 0.25-0.35 mm, the plate thickness is 0.3-0.5 mm, and the number of plates is also 15-25. This stepped spacing design of the regulating plates 6 guides the ink to flow in the correct direction, reducing ink turbulence and microcapsule impact and accumulation, thus improving the smoothness of ink flow.

[0030] The coaxial stepped functional zones are provided with at least two, including at least one ink inlet zone 4 and one voltage stabilizing zone 5; the regulator 3 is provided with a pen feed 11 at one end connected to the pen tip 1.

[0031] The relay core 2 is made of one of the following materials: PP porous, PE porous or fiber sintered porous material. It has a high capillary ink guiding structure with a porosity of ≥35% and uniform pore size. It is compatible and stable with thermal erasable inks, and has no adsorption, no dissolution and no ink clogging.

[0032] Understandably, the relay core 2 uses a high porosity porous material, combined with the front taper and end face size design, which greatly improves the capillary adsorption and flow capacity of thermal erasable ink, and solves the problems of ink interruption and accumulation caused by insufficient porosity of traditional relay core 2.

[0033] like Figure 4 As shown, the relay core 2 is inserted inside the regulator 3. The regulator 3 has a central hole and a through hole. The interference fit between the relay core 2 and the central hole of the regulator 3 near the pen tip 1 is ≥0.05mm, and the interference fit between the relay core 2 and the through hole of the regulator 3 is ≥0.04mm. The end of the regulator 3 near the ink sac 8 is fitted with the pen barrel 7 with an interference fit ≤0.06mm.

[0034] Understandably, the relay core 2 is installed inside the regulator 3, with an interference fit ≥0.05mm with the center hole at the front end of the regulator 3 to ensure a tight seal and prevent ink leakage; the interference fit ≥0.04mm with the through hole at the rear end of the regulator 3 balances the assembly flexibility of the relay core 2 with ink flow. The tail end of the regulator 3 is interference-fitted with the pen barrel 7, with an interference fit ≤0.06mm. This ensures the assembly is secure while preventing excessive interference fit from deforming the regulator 3 and affecting ink supply and ventilation.

[0035] The width of the gas-liquid exchange channel 12 is ≥0.12mm, the bottom of the gas-liquid exchange channel 12 has a U-shaped structure and the R angle is ≥0.05; the difference between the inner groove angle of the front end of the pen tongue 11 of the regulator 3 and the taper of the relay core 2 is ≤30°.

[0036] like Figure 5 As shown, it can be understood that the regulator 3 is equipped with a dedicated gas-liquid exchange channel 12. The width of the gas-liquid exchange channel 12 is ≥0.12mm, and the bottom of the channel has a U-shaped structure with an R angle ≥0.05. Through the design of large width and arc transition, the accumulation of thermal erasable ink is avoided, while ensuring the balance of air pressure inside and outside the ink supply system and preventing ink interruption. The difference between the inner groove angle of the front end of the regulator 3's nib 11 and the taper of the relay core 2 is ≤30°, which realizes the fit between the regulator 3 and the relay core 2 and guides the ink to flow in the correct direction. At the same time, through the small gap and high coverage design between the nib 1 and the regulator 3, the ink is fully and stably conducted to the writing end to form a uniform capillary ink film, which improves the writing smoothness and ink uniformity of the thermal erasable fountain pen. In addition, it also effectively avoids the accumulation of thermal erasable ink and ensures the stability of air pressure inside and outside the ink supply system, fundamentally solving the problem of ink interruption and leakage caused by air pressure imbalance.

[0037] Example 2 This embodiment discloses a fountain pen, such as... Figures 6-8 As shown, the pen is a disposable, refillable, direct-liquid thermal erasable pen, including an ink supply structure based on a direct-liquid relay core 2, a pen cap 9 mounted on the pen barrel 7, and a pen moistening device 10, as described above. Figure 5 As shown, the pen moisturizer 10 is disposed in the pen cap 9.

[0038] The overall ink supply structure is simple, the component assembly parameters are precisely quantified, and it has strong adaptability. It can be directly matched and assembled with the existing pen barrel 7 ink tank and ink sac 8 components. It is also compatible with disposable and refillable direct liquid thermal erasable fountain pens, making it suitable for a wider range of scenarios and easy to industrialize and promote its application.

[0039] The closed humidity system formed by the pen cap 9 with the built-in pen moisturizer 10 can effectively suppress the rapid loss of volatile components in the heat-sensitive erasable ink at the ink outlet of the pen tip 1, and fundamentally avoid writing problems such as clogging of the micropores of the pen tip 1, interruption of ink flow, or poor writing caused by ink drying and solidification. At the same time, it can significantly reduce the ineffective evaporation loss of ink, significantly extend the effective service life of the writing instrument and the stability of continuous writing, and comprehensively optimize the user's writing experience.

[0040] The inner contour and size of the pen moistener 10 are adapted to the shape and structure of the pen tip 1. When the pen cap 9 is engaged with the writing pen, the tip 1 of the writing pen is fully inserted into the pen moistener 10, and the pen moistener 10 forms a tight, full-circumferential wrap around the ink outlet end of the pen tip 1.

[0041] The pen moisturizer 10 is made of a porous, soft medium material with capillary adsorption properties, and its initial state is dry. When the pen moisturizer 10 is used, the heat-sensitive erasable ink remaining at the tip of the pen nib 1 migrates into the pen moisturizer 10 through capillary action until the pen moisturizer 10 reaches a constant humidity state with ink adsorption saturation, thereby establishing a dynamic ink balance system between the ink supply system, the pen nib 1, and the pen moisturizer 10.

[0042] Example 3 This embodiment discloses a method for assembling a fountain pen, including the following steps: The tapered front end of the relay core 2 is inserted into the tail hole of the regulator 3, and the appropriate assembly position is achieved by the auxiliary fixture; through the cooperation of the claw on the pen tip 1 and the pen tongue 11 of the regulator 3, the end of the pen tip 1 near the ink inlet area 4 contacts the regulating plate 6, forming the core ink supply component. Heat-erasable ink is filled into ink cartridge 8 through a filling machine. Ink cartridge 8 is inserted into the end of the grip. The ink is delivered to the front end of relay core 2 through the gas-liquid exchange channel 12 of regulator 3. The front end of relay core 2 contacts the capillary channel of pen tip 1, and the ink then reaches pen tip 1 to achieve the writing effect. The pen cap 9 of the built-in pen moistener 10 is fastened to the front end of the pen barrel 7. After fastening, the pen moistener 10 tightly wraps around the writing end of the pen tip 1. The ink is introduced into the pen moistener 10 through capillary action, completing the assembly of the entire ink supply system.

[0043] During normal writing, as temperature and air pressure change, some ink enters the air-liquid exchange channel 12 of the regulator 3. Due to the adoption of a U-shaped bottom arc structure and air pressure balance design, the accumulation of heat-sensitive erasable ink is effectively avoided, ensuring the stability of air pressure inside and outside the ink supply system, and fundamentally solving the problems of ink interruption and leakage caused by air pressure imbalance.

[0044] When in use, insert the ink sac 8 into the end of the pen barrel 7. The ink comes into contact with the relay core 2 and is transported to the front end of the relay core 2 through the capillary action of the relay core 2 and the gas-liquid exchange channel 12 of the regulator 3. Since the front end of the relay core 2 is in contact with the capillary channel of the pen tip 1, the ink then reaches the pen tip 1 to achieve the writing effect.

[0045] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. An ink supply structure based on a direct-liquid relay core structure, characterized in that, include: The pen includes a pen tip, a relay core, an adjuster, a pen barrel ink tank, and an ink sac. One end of the relay core is connected to the ink sac and in contact with the ink inside the ink sac, while the other end of the relay core is connected to the pen tip. The pen tip is fitted onto the adjuster, and the relay core passes through the inside of the adjuster and is connected to the pen tip. The pen tip, the adjuster, and the relay core are all installed inside the pen barrel ink tank. The regulator includes coaxial stepped functional zones arranged sequentially along the ink flow direction, namely an ink inlet zone and a voltage stabilizing zone. Adjustment plates are provided in both the ink inlet zone and the voltage stabilizing zone, and the spacing between the adjustment plates gradually increases from the ink inlet zone to the ink guiding zone. The adjustment plates are provided with gas-liquid exchange channels.

2. The ink supply structure based on a direct-liquid relay core structure as described in claim 1, characterized in that, The spacing between the adjusting plates in the ink inlet area is 0.12-0.25mm, the number of adjusting plates is 15-25, and the thickness of the adjusting plates is 0.3-0.5mm; the spacing between the adjusting plates in the voltage stabilizing area is 0.25-0.35mm, the number of adjusting plates is 15-25, and the thickness of the adjusting plates is 0.3-0.5mm.

3. The ink supply structure based on a direct-liquid relay core structure as described in claim 1, characterized in that, The coaxial stepped functional zones are provided with at least two, including at least one ink inlet zone and one voltage stabilization zone; the end of the regulator connected to the pen tip is provided with a pen feed.

4. The ink supply structure based on a direct-liquid relay core structure as described in claim 1, characterized in that, The relay core is made of one of the following materials: PP porous, PE porous or fiber sintered porous material, with a porosity ≥35%.

5. The ink supply structure based on a direct-liquid relay core structure as described in claim 1, characterized in that, The relay core is inserted inside the regulator, which has a central hole and a through hole. The interference fit between the relay core and the central hole of the regulator near the pen tip is ≥0.05mm, and the interference fit between the relay core and the through hole of the regulator is ≥0.04mm. The end of the regulator near the ink sac is fitted with the pen barrel, and the interference fit is ≤0.06mm.

6. The ink supply structure based on a direct-liquid relay core structure as described in claim 1, characterized in that, The regulator is provided with a gas-liquid exchange channel with a width ≥ 0.12 mm and a U-shaped bottom with an R angle ≥ 0.

05. The difference between the angle of the inner groove at the front end of the regulator's pen tongue and the taper of the relay core is ≤ 30°.

7. A fountain pen, wherein the fountain pen is a disposable, refillable, direct-liquid, thermally erasable fountain pen, characterized in that, The invention includes an ink supply structure based on a direct-liquid relay core structure as described in any one of claims 1-6, a pen cap mounted on the pen barrel, and a pen moistening device, wherein the pen moistening device is disposed in the pen cap.

8. A fountain pen as described in claim 7, characterized in that, The inner contour shape and accommodating size of the brush moistener are adapted to the shape and structure of the brush tip.

9. A fountain pen as described in claim 1, characterized in that, The pen moistening device is made of a porous soft medium material with capillary adsorption properties, and its initial state is dry.

10. A method for assembling a pen as described in any one of claims 7-9, characterized in that, Includes the following steps: Insert the tapered front end of the relay core into the tail hole of the regulator, and use an auxiliary fixture to achieve the appropriate assembly position; through the cooperation of the claw on the pen tip and the pen tongue of the regulator, the end of the pen tip near the ink inlet area contacts the regulating plate. The heat-erasable ink is filled into the ink cartridge through the filling machine, and the ink cartridge is inserted into the end of the grip. The ink is delivered to the front end of the relay core through the gas-liquid exchange channel of the regulator; the front end of the relay core contacts the capillary channel of the pen tip. The pen cap with the built-in ink moistener is fastened to the front of the pen barrel. After fastening, the ink moistener tightly wraps around the writing tip, and the ink is introduced into the ink moistener through capillary action, completing the assembly of the entire ink supply system.

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