Liquid direct marker
By using a rigid, porous ink reservoir that is properly positioned to match the pen tip, the problem of easy deformation and displacement of sponge ink reservoirs during assembly is solved, thus improving the stability of ink supply and writing effect, and extending the life of the pen.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU TIANJIAO PEN IND
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-03
AI Technical Summary
In existing direct-liquid markers, the sponge ink reservoir is prone to deformation and displacement during assembly due to contact with the pen barrel or pen tip, affecting ink supply stability and performance.
The ink reservoir uses a rigid, porous material, such as porous ceramic or porous plastic, and is connected to the pen tip through a positioning fit to avoid deformation. The porous structure enables stable ink flow, and the spring-controlled valve core ensures stable ink supply.
It improves the stability of ink supply and writing effect, reduces the deformation and displacement of the ink reservoir, extends the life of the pen, and reduces the frequency of pen tip replacement.
Smart Images
Figure CN224447282U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of writing instruments, specifically to a direct-liquid marker. Background Technology
[0002] Markers are a common writing and drawing tool. The nib is mostly made of fiber material, and the barrel contains ink. With its fast drying speed and strong coverage, it is widely used in various scenarios such as hand-drawn design, illustration creation, highlighting, and poster production.
[0003] The structure of a typical direct-ink marker on the market usually consists of a pen barrel, an ink reservoir inside the pen barrel, an ink reservoir, a flow guide component, and a fiber pen tip. The ink reservoir is used to store ink, and the ink reservoir is located between the ink reservoir and the pen tip. It is used to temporarily store and regulate the ink flow, preventing ink from directly impacting the pen tip and causing excessive ink flow, thus ensuring a stable ink supply.
[0004] Existing direct-ink markers typically use sponge material for their ink reservoirs. Sponge ink reservoirs have numerous micropores that can absorb and temporarily store a certain amount of ink. During assembly, the ink reservoir needs to be inserted into the pen barrel. However, because the sponge is relatively soft, it is very easy for it to come into contact with the pen barrel or pen tip during assembly, causing deformation and displacement, which affects the final performance. Summary of the Invention
[0005] To address the shortcomings of existing technologies, this utility model provides a direct-liquid marker, which solves the problem that the ink reservoirs in existing direct-liquid markers, made of sponge material, are prone to deformation and displacement during assembly due to their soft texture, which in turn affects the stability of ink supply and the performance of the marker.
[0006] This utility model discloses a direct-liquid marker pen, comprising a pen barrel containing an ink reservoir, an ink storage chamber, and a pen tip. The pen tip is made of fiber material, with its front end extending from the front of the pen barrel to form a pen nib. The rear end of the pen tip is connected to the ink storage chamber, which is located in front of the ink reservoir. The pen barrel includes a chamber connected to the ink reservoir, through which ink from the ink reservoir contacts the ink storage chamber. The rear end of the pen tip passes through the center of this chamber. The ink storage chamber has a cylindrical structure, fitted around the rear end of the pen tip and located within the chamber. The inner wall of the ink storage chamber and the outer side of the pen tip form a positioning fit, allowing the ink storage chamber and the ink storage chamber to... The pen tips do not move relative to each other. There is a gap between the outer peripheral wall of the ink reservoir and the inner peripheral wall of the cavity, which allows it to be easily inserted into the inside of the pen barrel. The ink in the cavity can also enter into the gap and come into contact with the ink reservoir, improving the ink supply effect of the ink reservoir. The ink reservoir is made of a rigid porous material, which is harder than a sponge and will not deform during assembly. Due to its porous structure, it can store a certain amount of ink through the pores, forming a buffer storage space for ink. At the same time, it can guide the ink in the ink reservoir cavity to the pen tip evenly and stably through the capillary action between the pores, avoiding excessive ink flow and improving the writing effect.
[0007] The ink reservoir can be made of porous ceramics, porous plastics, etc.
[0008] Furthermore, the ink reservoir is made of a rigid, porous structure formed by interlacing and bonding fibers. This structure is less prone to deformation during assembly, provides a more reliable fit with the fiber-based pen tip, ensures smoother ink delivery, and is less costly. The fibers can be glass fiber, polyester fiber, or ceramic fiber.
[0009] Furthermore, the ink reservoir is made of glass wool. Glass wool has relatively uniform pores, stable ink delivery speed, and good anti-drying effect. It can effectively absorb and lock in ink to prevent ink leakage. The water absorption rate of glass wool is lower than that of the pen tip. When the pen tip is about to dry, the glass wool can replenish the pen tip with ink in time. This avoids the problem of the pores of the pen tip being blocked by powder after drying due to the high powder content in the ink, which prevents writing. It reduces the trouble of replacing the pen tip and improves the convenience and durability of the pen. In addition, glass wool has strong chemical stability and is not easy to react chemically with ink. Its hardness is relatively higher than that of sponge, and it is not easy to be squeezed and deformed during assembly.
[0010] Furthermore, the middle part of the pen tip includes a connecting section with a uniform outer diameter and a tapered guide section connected to the front or rear end of the connecting section. The connecting section is sleeved with the ink reservoir, and the tapered guide section is used to guide the ink reservoir to the connecting section, which facilitates the sleeved assembly between the ink reservoir and the pen tip.
[0011] Furthermore, the pen barrel includes a shaft and an end cap that is inserted and fixed to the front end of the shaft. The end cap has a mounting hole at its rear end and includes an annular front wall located in front of the mounting hole. The rear end of the pen tip and the ink reservoir are inserted into the mounting hole. The ink reservoir and the pen tip are inserted into the mounting hole from the rear side of the end cap to the front for assembly. The annular front wall can play a limiting role.
[0012] Furthermore, the end cap has a pen tip hole at its front end for the pen tip to extend out. The inner circumferential wall of the pen tip hole is provided with multiple axially extending ribs evenly distributed around it. The multiple ribs and the periphery of the pen tip form a support fit. Between adjacent circumferential ribs, there are air holes that are connected to the mounting hole. The rear end of the air holes extends to the annular front wall. The air holes can be used to balance the air pressure between the ink storage chamber and the outside. The radial support of the pen tip by the multiple ribs can prevent the pen tip from wobbling laterally when writing.
[0013] Furthermore, the ink storage chamber is located inside the rod, and a valve is provided at the front end of the rod. The valve includes a valve body that is inserted and fixed inside the front end of the rod, a valve core that is movably disposed inside the valve body, a valve seat that is inserted and fixed at the front end of the valve body and seals with the valve core, and a spring that abuts against the valve body and the valve core. The valve core is inserted and fixedly engaged with the rear end of the pen tip. The valve core retracts and separates from the valve seat by the writing pressure of the pen tip. The valve core returns to its original position by the elastic force of the spring and seals with the valve seat. During daily writing and drawing, the pen tip retracts due to pressure, which drives the valve core to retract, separating the valve core from the valve seat. The ink in the ink storage chamber flows to the chamber and replenishes the chamber and the ink reservoir. When the pressure disappears, the valve core returns to its original position by the spring force and seals with the valve seat, blocking the flow of ink between the ink storage chamber and the chamber, thus preventing ink evaporation when the pen is not used for a long time. Because there is a gap between the outer peripheral wall of the ink reservoir and the inner peripheral wall of the cavity, the ink reservoir will not interfere with the inner wall of the pen barrel when the pen tip moves, which can reduce resistance and prevent the pen tip from getting stuck and unable to return to its normal forward position. Attached Figure Description
[0014] Figure 1 This is an exploded view of an embodiment of the present utility model;
[0015] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;
[0016] Figure 3 for Figure 2 A magnified view of a portion of the image;
[0017] Figure 4 This is a structural diagram of the ink reservoir according to an embodiment of the present invention;
[0018] Figure 5 This is a structural diagram of the end cap according to an embodiment of the present utility model;
[0019] Figure 6 This is a structural diagram of the pen tip according to an embodiment of the present invention. Detailed Implementation
[0020] Examples of embodiments of this utility model of direct-liquid marker pen, such as... Figure 1-6 As shown, the pen includes a barrel containing an ink reservoir 101, an ink reservoir 2, and a pen tip 3. The pen tip 3 is made of fiber material, with its front end extending from the front of the barrel to form a pen nib 31. The rear end of the pen tip 3 is connected to the ink reservoir 2, which is located in front of the ink reservoir 101. The pen barrel includes a chamber 102 connected to the ink reservoir 101. Ink in the ink reservoir 101 passes through this chamber 102 and contacts the ink reservoir 2. The rear end of the pen tip 3 passes through the center of this chamber 102. The ink reservoir 2 has a cylindrical structure and is fitted around the rear end of the pen tip 3 within the chamber 102. The inner wall of the ink reservoir 2 and the outer side of the pen tip 3 form a positioning fit, preventing relative displacement between the ink reservoir 2 and the pen tip 3. A gap is left between the peripheral wall and the inner peripheral wall of the chamber 102, which facilitates the insertion into the inside of the pen barrel. In this embodiment, when the ink reservoir 2 and the pen tip 3 are not filled with ink, the inner diameter of the ink reservoir 2 is slightly larger than the outer diameter of the pen tip 3, which is more conducive to the fitting of the ink reservoir 2. However, after the ink reservoir 2 expands, the gap between the ink reservoir 2 and the pen tip 3 decreases and the contact area increases. The damping generated when the ink reservoir 2 and the pen tip 3 are in contact with each other is used to achieve the positioning of the two, making it difficult for them to move relative to each other. This can prevent the ink reservoir 2 from shaking. In particular, since the pen tip 3 can move back and forth in this embodiment, the movement of the pen tip 3 can also drive the ink reservoir 2 to move synchronously, which can ensure a stable and reliable ink transfer effect between the ink reservoir 2 and the pen tip 3. In other embodiments, when the ink reservoir 2 and the pen tip 3 are not filled with ink, the inner diameter of the ink reservoir 2 can be slightly smaller than the outer diameter of the pen tip 3, which can also achieve the positioning effect. Therefore, in this utility model, the positioning fit between the inner wall of the ink reservoir 2 and the outer side of the pen tip 3 specifically refers to the positioning fit in the ink absorption and expansion state.
[0021] In this embodiment, since the pen tip 3 can move back and forth based on writing pressure and the force of the spring 44, the gap setting can prevent the ink reservoir 2 from interfering with the inner peripheral wall of the chamber 102 when it moves back and forth with the pen tip 3. In addition, the ink in the chamber 102 can also enter the gap and contact the outer peripheral surface of the ink reservoir 2, increasing the contact area between the ink reservoir 2 and the ink, thereby improving the ink supply effect of the ink reservoir 2. The ink reservoir 2 is made of a rigid porous material, which is harder than a sponge. It will not deform or shift during assembly. Furthermore, due to its porous structure, it can store a certain amount of ink through the pores, forming a buffer storage space for the ink. It can also guide the ink in the ink reservoir 101 to the pen tip 3 evenly and stably by means of capillary action between the pores, avoiding excessive ink output and improving the writing effect.
[0022] The ink reservoir 2 can be made of porous ceramic or porous plastic, etc., and is made of a rigid porous structure formed by interlacing and bonding fibers. It is less prone to compression deformation during assembly, making it more reliable in conjunction with the fiber-made pen tip 3, providing smoother ink delivery, and reducing costs. The fibers can be glass fiber, polyester fiber, or ceramic fiber.
[0023] In this embodiment, the ink reservoir 2 is made of glass wool. Glass wool has relatively uniform pores, resulting in stable ink delivery. Its water absorption rate is lower than that of the pen tip. When the pen tip is about to dry out, the glass wool can replenish the ink in time, preventing the pen tip from becoming clogged with powder due to high powder content in the ink, thus reducing the hassle of replacing the pen tip and improving the pen's ease of use and durability. Furthermore, glass wool has strong chemical stability, is less prone to chemical reactions with ink, and has higher hardness than sponge, making it less susceptible to deformation during assembly.
[0024] like Figure 6 As shown, the middle part of the pen tip 3 includes a connecting section 31 with a uniform outer diameter and a tapered guide section 32 connected to the front or rear end of the connecting section 31. The uniform outer diameter means that the connecting section 31 has the same outer diameter at all points along the axial direction. The maximum outer diameter of the tapered guide section 32 is the same as that of the connecting section 31. The connecting section 31 is sleeved with the ink reservoir 2. The tapered guide section 32 is used to guide the ink reservoir 2 to the connecting section 31 of the pen tip 3, so as to facilitate the sleeved assembly between the ink reservoir 2 and the pen tip 3.
[0025] The pen barrel includes a shaft 11 and an end cap 12 that is inserted and fixed to the front end of the shaft 11. The end cap 12 has a mounting hole 120 at its rear end and includes an annular front wall 121 located in front of the mounting hole 120. The rear end of the pen tip 3 and the ink reservoir 2 are inserted into the mounting hole 120. The ink reservoir 2 and the pen tip 3 are inserted from the rear side of the end cap 12 forward into the mounting hole 120 for assembly. The annular front wall 121 can play a limiting role to avoid over-insertion.
[0026] like Figure 3 , Figure 5As shown, the end cap 12 has a pen tip hole 122 at its front end for the pen tip 3 to extend out. Multiple axially extending ribs 123 are evenly distributed circumferentially on the inner circumferential wall of the pen tip hole 122. These ribs 123 and the pen tip 3 form a supporting fit. Air holes 124, connected to the mounting hole 120, are formed between adjacent circumferential ribs 123 at intervals. The rear end of the air holes 124 extends to the annular front wall 121. The air holes 124 are used to balance the air pressure between the ink storage chamber 101 and the outside environment. The radial support of the pen tip 3 by the multiple ribs 123 prevents lateral wobbling of the pen tip 31 during writing. In this embodiment, since the pen tip 3 needs to move back and forth, a certain gap is left between the ribs 123 and the pen tip 3 to reduce resistance. In this embodiment, both the annular front wall 121 and the rear end of the ribs 123 have a tapered profile, which guides the front end of the pen tip 3 into the pen tip hole 122. It should be noted that, because the gap between the ink reservoir 2 and the pen barrel is narrow enough, the ink will not overflow forward through the gap and the vent 124 due to the influence of surface tension.
[0027] The ink storage chamber 101 is located inside the rod 11. A valve is provided at the front end of the rod 11. The valve includes a valve body 41 that is inserted and fixed inside the front end of the rod 11, a valve core 42 that is movably disposed inside the valve body 41, a valve seat 43 that is inserted and fixed to the front end of the valve body 41 and seals with the valve core 42, and a spring 44 that abuts against the valve body 41 and the valve core 42. The valve core 42 is inserted and fixedly engaged with the rear end of the pen tip 3. The valve core 42 retracts and separates from the valve seat 43 by the writing pressure of the pen tip 3. The valve core 42 is then released by the spring. The elastic force of spring 44 returns the pen tip to its original position and seals it with valve seat 43. During daily writing and drawing, the pen tip 3 retracts due to pressure, which in turn moves valve core 432 backward. Valve core 42 separates from valve seat 43, allowing ink in ink reservoir 101 to flow into chamber 102 and replenish ink to chamber 102 and ink reservoir 2. When the pressure disappears, valve core 432 returns to its original position by spring force and seals with valve seat 43, blocking ink flow between ink reservoir 2 and chamber 102, thus preventing ink evaporation when the pen is not used for a long time. Because there is a gap between the outer peripheral wall of ink reservoir 2 and the inner peripheral wall of chamber 102, the ink reservoir 2 will not interfere with the inner wall of the pen barrel when the pen tip 3 moves it, reducing resistance and preventing the pen tip 3 from getting stuck and unable to return to its original position.
[0028] In addition, a movable block 5 is provided in the ink storage cavity 101 to maintain ink flow.
[0029] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.
Claims
1. A direct-liquid marker pen, comprising a pen barrel, an ink reservoir, an ink storage chamber, and a pen tip respectively disposed within the pen barrel, the front end of the pen tip extending from the front end of the pen barrel to form a pen tip, the rear end of the pen tip being connected to the ink reservoir, and the ink reservoir being connected to the front of the ink reservoir, characterized in that: The pen barrel includes a chamber connected to the ink reservoir. The rear end of the pen tip passes through the center of the chamber. The ink reservoir has a cylindrical structure and is fitted around the rear end of the pen tip and located in the chamber. The inner wall of the ink reservoir and the outer side of the pen tip form a positioning fit. A gap is left between the outer peripheral wall of the ink reservoir and the inner peripheral wall of the chamber. The ink reservoir is made of a rigid porous material.
2. The liquid direct marker according to claim 1, characterized by: The ink reservoir is made of a rigid porous structure formed by interlacing and bonding fibers.
3. The liquid direct marker according to claim 2, characterized in that: The ink reservoir is made of glass wool.
4. The liquid direct marker according to claim 1, characterized by: The pen tip includes a connecting section with a uniform outer diameter and a tapered guide section connected to the front or rear end of the connecting section. The connecting section is fitted with the ink reservoir, and the tapered guide section is used to guide the ink reservoir to the connecting section.
5. The liquid direct marker according to claim 1, characterized by: The pen barrel includes a shaft and an end cap that is inserted and fixed to the front end of the shaft. The end cap has a mounting hole at its rear end and includes an annular front wall located in front of the mounting hole. The rear end of the pen tip and the ink reservoir are inserted into the mounting hole.
6. The liquid direct marker according to claim 4, characterized by: The end cap has a pen tip hole at the front end for the pen tip to extend out. The inner circumferential wall of the pen tip hole is provided with multiple axially extending ribs evenly distributed in the circumferential direction. The multiple ribs and the four sides of the pen tip form a support fit. A vent hole connected to the mounting hole is formed between adjacent circumferential ribs. The rear end of the vent hole extends to the annular front wall.
7. The liquid direct marker according to claim 4, characterized by: The ink storage chamber is located inside the rod. A valve is provided at the front end of the rod. The valve includes a valve body that is inserted and fixed inside the front end of the rod, a valve core that is movably disposed inside the valve body, a valve seat that is inserted and fixed at the front end of the valve body and seals with the valve core, and a spring that abuts against the valve body and the valve core. The valve core is inserted and fixedly engaged with the rear end of the pen tip. The valve core retracts and separates from the valve seat by the writing pressure of the pen tip. The valve core returns to its original position by the elastic force of the spring and seals with the valve seat.