Direct-flow liquid type mark pen
By introducing a matching groove structure between the ink core and the water reservoir, and a ring-shaped partition design into the DC liquid marker, the problems of ink leakage and ink interruption caused by temperature changes are solved, achieving stable ink supply and uniform writing even in extreme environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-03-31
AI Technical Summary
Existing direct current liquid markers are prone to problems such as ink leakage, ink interruption, or uneven ink flow when there are drastic temperature changes, which affects the writing quality.
A direct-flow liquid marker pen was designed, which adopts a matching groove structure between the ink core and the ink reservoir, combined with the partition design of the annular plate to form a stable sealing interface and a graded air pressure regulation system. The ink flow rate is controlled by capillary effect, and the air pressure difference is adjusted to avoid excessive ink leakage or interruption due to temperature changes.
It effectively prevents ink leakage and ink interruption caused by drastic temperature changes, ensures a stable ink supply in extreme environments, and improves the continuity and uniformity of writing.
Smart Images
Figure CN224060730U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of marker technology, and in particular to a direct current liquid marker. Background Technology
[0002] A direct-flow liquid marker is a writing instrument that uses water-based, oil-based, or other liquid pigments as ink. As an important writing tool, direct-flow liquid markers are loved by users for their smooth writing, vibrant colors, and portability.
[0003] During the use, storage, and transportation of direct-flow liquid markers, environmental factors can cause pressure differences inside and outside the ink tank, leading to ink leakage. When the temperature rises, the saturated vapor pressure inside the ink tank increases. Under pressure, the ink flows through the gas-liquid exchange channel into the annular plate of the regulator to prevent leakage. When the temperature returns to normal, the saturated vapor pressure inside the ink tank decreases, and the ink flows back into the ink tank under capillary action. When the temperature changes drastically, the excessively high pressure prevents the ink from entering the regulator in time, greatly increasing the risk of leakage. Therefore, a common problem with existing direct-flow liquid markers is that they are prone to ink interruptions or uneven ink flow during writing, affecting writing quality. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a DC liquid marker, thereby overcoming the deficiencies in the prior art.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a direct-flow liquid marker pen, comprising a pen barrel and a water inlet core, wherein a pen tip sleeve is provided at the front end of the pen barrel, a water reservoir is provided in the middle of the pen barrel, and an ink tank is provided at the rear end of the pen barrel. One end of the water reservoir is connected to the pen tip sleeve, and the other end of the water reservoir is connected to the ink tank. A through hole is provided inside the water reservoir to fit with the water inlet core with a clearance fit. One end of the water inlet core is connected to the pen tip sleeve, and the other end of the water inlet core is connected to the water reservoir through the through hole. The water reservoir has a first fitting groove for interference fit with the upper end of the water inlet core and a second fitting groove for clearance fit with the lower end of the water inlet core. Both the first fitting groove and the second fitting groove are connected to the through hole, and the first fitting groove is located above the second fitting groove.
[0006] The inner diameter of the first mating groove 7 is 0.95-0.99 times the outer diameter of the water core 2.
[0007] Preferably, the inner diameter of the first mating groove 7 is 0.97 times the outer diameter of the water core 2.
[0008] The inner diameter of the second mating groove 8 is 1.25-1.29 times the outer diameter of the water core 2.
[0009] Preferably, the inner diameter of the second mating groove 8 is 1.27 times the outer diameter of the water core 2.
[0010] The connection between the first mating groove and the second mating groove is provided with a transition slope.
[0011] The water reservoir is cylindrical, with a first mating ring and a second mating ring at each end. The pen tip sleeve is provided with a third mating ring, and the first and third mating rings are respectively mated and connected to the inner wall of the pen barrel.
[0012] Among them, multiple sets of annular plates are provided between the first mating ring and the second mating ring, and the multiple sets of annular plates are arranged at intervals along the axial direction of the water storage device.
[0013] The annular plate includes multiple sets of first annular fins and multiple sets of second annular fins, wherein the spacing between two adjacent first annular fins is smaller than the spacing between two adjacent second annular fins.
[0014] The distance between two adjacent first annular fins is 0.7-0.9 times the distance between two adjacent second annular fins.
[0015] Preferably, the spacing between two adjacent first annular fins is 0.8 times the spacing between two adjacent second annular fins.
[0016] The water reservoir has a flow guide ring for guiding ink flow and an adjustment ring for reducing ink flow resistance arranged sequentially at intervals in the middle facing downwards. The first annular fin is located between the flow guide ring and the first mating ring, and the second annular fin is located between the flow guide ring and the adjustment ring.
[0017] The guide ring has a first groove for adjusting the air pressure difference inside and outside the water reservoir, and the first groove is located between the first annular fin and the second annular fin.
[0018] The radial cross-section of the first groove is rectangular.
[0019] Each of the multiple sets of second annular fins has a second groove, which is recessed from the first groove toward the adjustment ring.
[0020] The volume of the second groove is smaller than the volume of the first groove.
[0021] The water reservoir has a ventilation groove, which is positioned opposite to the first groove and extends through the top wall of the first mating ring toward the second annular fin.
[0022] The water reservoir has a first connector that protrudes radially therefrom, and the pen tip sleeve includes a second connector with an annular recess and a pen tip assembled on the second connector, wherein the first connector is assembled in the second connector.
[0023] The second mating ring has a third groove, and the adjusting ring has a fourth groove, with the fourth groove facing the third groove.
[0024] The first connector has a fifth groove on each of its opposite sides.
[0025] The pen barrel has a cap at the end away from the water reservoir, and the cap is attached to the surface of the pen tip.
[0026] The beneficial effects of this utility model are as follows: by interfering with the upper end of the water inlet core through the first mating groove set inside the water reservoir, a stable sealing interface is formed, which suppresses the backflow of ink under pressure fluctuations. With the partition design of the annular plate, the dense first annular fins at the top enhance the capillary adsorption effect, control the ink flow rate, and avoid excessive ink leakage caused by the sudden rise in saturated vapor pressure when the temperature changes drastically. At the same time, the first groove of the guide ring, together with the ventilation groove and the second groove on the water reservoir, constitute a graded air pressure regulation system, which dynamically balances the pressure difference inside and outside the ink tank. Even under extreme temperature difference environments, high pressure can be released or negative pressure can be compensated through the coordinated release of multiple air paths, eliminating the risk of ink leakage caused by the failure of a single regulation channel.
[0027] By setting a gap fit structure between the lower end of the water-guiding core and the second mating groove, the cross-sectional area of the ink flow channel is widened. Combined with the partitioned layout of the annular plates inside the water reservoir, the dense spacing of the first annular fins finely adjusts the initial flow rate through strong capillary effect, while the wider spacing of the second annular fins reduces the flow resistance at the end, forming a gradual flow gradient from top to bottom, avoiding ink interruption or ink accumulation caused by sudden changes in local resistance. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the structure of a DC liquid marker according to an embodiment of this application;
[0029] Figure 2 This is an exploded structural diagram of a DC liquid marker according to an embodiment of this application;
[0030] Figure 3 This is a schematic diagram of the water storage device in the embodiments of this application;
[0031] Figure 4 This is a top view of the water storage device in an embodiment of this application;
[0032] Figure 5 yes Figure 4Schematic diagram of the cross-sectional structure along the AA direction;
[0033] Figure 6 This is a structural schematic diagram of the water storage device from another angle in an embodiment of this application.
[0034] Explanation of reference numerals in the attached drawings: 1. Pen barrel; 2. Ink core; 3. Pen tip cap; 4. Ink reservoir; 5. Ink tank; 6. Through hole; 7. First mating groove; 8. Second mating groove; 9. First mating ring; 10. Second mating ring; 11. Third mating ring; 12. First annular fin; 13. Second annular fin; 14. Guide ring; 15. Adjustment ring; 16. Vent groove; 17. First connector; 18. Second connector; 19. Pen tip; 20. Pen cap; 21. First groove; 22. Second groove; 23. Third groove; 24. Fourth groove; 25. Fifth groove. Detailed Implementation
[0035] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so as to intuitively and vividly understand each technical feature and overall technical solution of the present utility model. However, they should not be construed as limiting the scope of protection of the present utility model.
[0036] In the description of this utility model, if directional descriptions are involved, such as "up," "down," "front," "back," "left," "right," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, it is only for the convenience of describing this utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. When a feature is referred to as "set," "fixed," or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.
[0037] In the description of this utility model, the term "several" means one or more, and "multiple" means two or more. The terms "greater than," "less than," and "exceeding" should be understood as excluding the stated number. The terms "above," "below," and "within" should be understood as including the stated number. The terms "first" and "second" should be understood as distinguishing technical features and not as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.
[0038] Furthermore, unless otherwise defined, the technical and scientific terms used in this invention have the same meanings as commonly understood by one of ordinary skill in the art. The terminology used in this invention is for the purpose of describing particular embodiments only and not for limiting the invention. It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof.
[0039] Example: Figure 1-6 As shown, a direct-flow liquid marker includes a pen barrel 1 and an ink cartridge 2. A pen tip sleeve 3 is located at the front end of the pen barrel 1, an ink reservoir 4 is located in the middle of the pen barrel 1, and an ink tank 5 is located at the rear end of the pen barrel 1. One end of the ink reservoir 4 is connected to the pen tip sleeve 3, and the other end of the ink reservoir 4 is connected to the ink tank 5. A through hole 6 is provided inside the ink reservoir 4, which is clearance-fitted with the ink cartridge 2. One end of the ink cartridge 2 is connected to the pen tip sleeve 3, and the other end of the ink cartridge 2 passes through the through hole 6 and connects to the ink reservoir 4. The interior of the ink reservoir 4... A first fitting groove 7 is provided for interference fit with the upper end of the water-guiding core 2, and a second fitting groove 8 is provided for clearance fit with the lower end of the water-guiding core 2. Both the first fitting groove 7 and the second fitting groove 8 are connected to the through hole 6. The first fitting groove 7 is located above the second fitting groove 8. By setting the first fitting groove 7 and the second fitting groove 8, the upper end of the water-guiding core 2 is fixed and the lower end is guided. The interference fit at the upper end stabilizes the ink flow and prevents ink backflow, while the clearance fit at the lower end ensures smooth ink flow, achieving a balance between stable ink supply and prevention of ink interruption.
[0040] The inner diameter of the first mating groove 7 is 0.95-0.99 times the outer diameter of the water core 2.
[0041] Preferably, the inner diameter of the first mating groove 7 is 0.97 times the outer diameter of the water core 2.
[0042] The inner diameter of the second mating groove 8 is 1.25-1.29 times the outer diameter of the water core 2.
[0043] Preferably, the inner diameter of the second mating groove 8 is 1.27 times the outer diameter of the water core 2.
[0044] The first mating groove 7 and the second mating groove 8 are provided with a transition slope. The transition slope provides movement space for the lower end of the water-guiding core 2, which helps to ensure smooth ink flow.
[0045] The water reservoir 4 is cylindrical, with a first mating ring 9 and a second mating ring 10 at each end. The pen tip sleeve 3 is provided with a third mating ring 11. The first mating ring 9 and the third mating ring 11 are respectively connected to the inner wall of the pen barrel 1. The connection between the first mating ring 9 and the third mating ring 11 and the inner wall of the pen barrel 1 enhances the assembly stability of the water reservoir 4 and the pen barrel 1, and prevents the water reservoir 4 from shifting due to vibration or tilting.
[0046] Among them, multiple sets of annular plates are provided between the first mating ring 9 and the second mating ring 10. The multiple sets of annular plates are arranged at intervals along the axial direction of the water reservoir 4. The design of multiple sets of annular plates expands the contact area between the water reservoir 4 and the ink, which is conducive to improving the uniform adsorption of ink by capillary action. The annular interval formed between the annular plates serves as an ink flow channel, which can adjust the flow rate and avoid local ink accumulation or flow interruption, thereby improving the uniformity of ink supply.
[0047] The annular plate includes multiple sets of first annular fins 12 and multiple sets of second annular fins 13. The spacing between two adjacent first annular fins 12 is smaller than the spacing between two adjacent second annular fins 13. Through the partition design of the densely spaced first annular fins 12 and the sparsely spaced second annular fins 13, gradient ink control is achieved. The dense first annular fins 12 at the upper end control the ink flow rate, stabilize the ink flow, and prevent ink interruption and leakage. The sparse second annular fins 13 at the lower end eliminate the vacuum at the upper part of the pen barrel 1, allowing the ink to flow smoothly, ensuring sufficient ink supply, and balancing the requirements of writing fluency and leakage prevention.
[0048] The spacing between two adjacent first annular fins 12 is 0.7-0.9 times the spacing between two adjacent second annular fins 13. By controlling the spacing ratio of the first annular fins 12 and the second annular fins 13, the capillary effect intensity is optimized, ensuring that the upper adsorption force is stronger than the lower force, forming a gradual flow from top to bottom, and avoiding ink accumulation due to gravity leading to leakage.
[0049] Preferably, the distance between two adjacent first annular fins 12 is 0.8 times the distance between two adjacent second annular fins 13.
[0050] The water reservoir 4 has a flow guide ring 14 for guiding ink flow and an adjustment ring 15 for reducing ink flow resistance arranged sequentially at intervals in the middle facing downwards. The first annular fin 12 is located between the flow guide ring 14 and the first mating ring 9, and the second annular fin 13 is located between the flow guide ring 14 and the adjustment ring 15. The arrangement of the flow guide ring 14 and the adjustment ring 15 provides an annular channel. The flow guide ring 14 controls the upper flow rate and guides the ink to flow along the channel formed by the first annular fin 12. The adjustment ring 15 optimizes the lower flow path and reduces ink flow resistance, so as to smoothly guide the ink to flow along the second annular fin 13 into the pen tip 19.
[0051] The flow guide ring 14 has a first groove 21 for adjusting the air pressure difference inside and outside the water reservoir 4. The first groove 21 is located between the first annular fin 12 and the second annular fin 13. The first groove 21 of the flow guide ring 14 is conducive to fine-tuning the air pressure difference inside and outside the water reservoir 4, offsetting the negative pressure caused by temperature changes or ink consumption, maintaining the uniform flow of ink, and preventing ink interruption or excessive ink output.
[0052] The first groove 21 has a rectangular radial cross-section, which increases its contact area with the air inside the pen barrel 1 and improves the effect of adjusting the pressure difference between the inside and outside.
[0053] In this embodiment, multiple sets of second annular fins 13 are provided with second grooves 22. The second grooves 22 are recessed from the first grooves 21 toward the adjustment ring 15. The setting of the second grooves 22 helps to release local pressure fluctuations and avoid ink supply abnormalities caused by the failure of a single air groove.
[0054] The volume of the second groove 22 is smaller than that of the first groove 21. By setting the volume difference between the two, a graded air pressure regulation system is formed. The air pressure is balanced radially by the first groove 21 and axially by the second groove 22, thereby improving the balance effect of their respective air pressures.
[0055] The water reservoir 4 is provided with a ventilation groove 16, which is arranged opposite to the first groove 21. The ventilation groove 16 extends from the top wall of the first mating ring 9 toward the second annular fin 13. The ventilation groove 16 can form an independent gas-liquid exchange path, increase the gas-liquid ventilation path, make the ink supply more stable, and prevent ink interruption and leakage.
[0056] The water reservoir 4 has a first connector 17 that protrudes radially therefrom, and the pen tip sleeve 3 includes a second connector 18 with an annular recess and a pen tip 19 assembled on the second connector 18. The first connector 17 is assembled in the second connector 18. The design of the first connector 17 and the second connector 18 simplifies the assembly process. The split design reduces the difficulty of parts processing and helps to improve the assembly effect of the water reservoir 4 and the pen tip sleeve 3.
[0057] The second mating ring 10 has a third groove 23, and the adjusting ring 15 has a fourth groove 24. The fourth groove 24 and the third groove 23 are arranged opposite each other. The third groove 23 and the fourth groove 24 arranged opposite each other form a flow guide path, which guides the ink from the ink tank 5 through the water reservoir 4 to the pen tip 19, reduces ink supply delay caused by turbulence, and helps to adjust the air pressure stability at the end of the water reservoir 4.
[0058] The first connector 17 has a fifth groove 25 on both sides facing each other. The fifth groove 25 of the first connector 17 provides a lateral ink buffer space. When writing at an angle, the multi-directional flow avoids insufficient ink supply on one side of the pen tip and improves the uniformity of writing at different angles.
[0059] The pen barrel 1 is provided with a pen cap 20 at the end away from the water reservoir 4. The pen cap 20 covers the surface of the pen tip 19. The sealing design of the pen cap 20 prevents air from directly contacting the pen tip, slows down the evaporation and solidification of ink, extends the service life of the pen tip, and at the same time prevents external pollutants from clogging the fiber pores and maintains the purity of the ink output.
[0060] The implementation principle of a DC liquid marker in this embodiment is as follows: When the ink flows from the ink tank 5 through the water reservoir 4 to the pen tip, the first annular fins 12, densely arranged in the water reservoir 4, control the initial ink flow rate through strong capillary adsorption, suppressing the instantaneous flow surge caused by sudden temperature rise or vibration. Meanwhile, the wider spacing of the second annular fins 13 reduces the flow resistance at the end, forming a gradient flow channel from top to bottom, ensuring that the ink is smoothly delivered to the water inlet core 2 under the assistance of gravity. The upper end of the water inlet core 2 forms a sealing interface through the interference fit of the first mating groove 7 to prevent ink backflow, while the lower end's clearance fit with the second mating groove 8 widens the flow channel cross-sectional area, ensuring continuous ink supply. When the ambient pressure fluctuates, the first groove 21 of the guide ring 14, together with the vent groove 16 and the second groove 22 on the water tank 4, form a graded air pressure regulation system. Under high pressure, the first groove 21 quickly releases the internal vapor pressure, guiding excess ink to be temporarily stored in the fin space. Under negative pressure, the vent groove 16 reverses the air flow to compensate for the pressure difference and avoid vacuum interruption. When the ink finally flows to the pen tip, the fifth groove 25 of the first connector 17 balances the unilateral pressure when writing at an angle by lateral flow guidance. Together with the fourth groove 24 and the third groove 23 at the end of the water tank 4, they align the flow path to eliminate turbulence interference and achieve uniform and stable ink supply from the ink tank 5 to the pen tip, completely avoiding ink leakage and ink interruption problems.
[0061] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications and substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A direct-flow liquid marker, comprising a pen barrel (1) and a water inlet core (2), wherein a pen tip sleeve (3) is provided at the front end of the pen barrel (1), a water reservoir (4) is provided in the middle of the pen barrel (1), and an ink tank (5) is provided at the rear end of the pen barrel (1). One end of the water reservoir (4) is connected to the pen tip sleeve (3), and the other end of the water reservoir (4) is connected to the ink tank (5). A through hole (6) is provided inside the water reservoir (4) to fit the water inlet core (2) with a clearance. One end of the water inlet core (2) is connected to the pen tip sleeve (3), and the other end of the water inlet core (2) is connected to the water reservoir (4) through the through hole (6). The marker is characterized in that: The water reservoir (4) is internally provided with a first matching groove (7) for interference fit with the upper end of the water guide core (2) and a second matching groove (8) for clearance fit with the lower end of the water guide core (2), the first matching groove (7) and the second matching groove (8) are in communication with the through hole (6), and the first matching groove (7) is located above the second matching groove (8).
2. A direct current liquid type marker according to claim 1, wherein: The water reservoir (4) is cylindrical, and the water reservoir (4) is provided with a first matching ring (9) and a second matching ring (10) at both ends respectively, and the pen head sleeve (3) is provided with a third matching ring (11), and the first matching ring (9) and the third matching ring (11) are respectively matched and connected with the inner wall of the pen barrel (1).
3. A direct current liquid type marker according to claim 2, wherein: A plurality of groups of annular fins are arranged between the first matching ring (9) and the second matching ring (10).
4. A direct current liquid type marker according to claim 3, wherein: The annular fins include a plurality of groups of first annular fins (12) and a plurality of groups of second annular fins (13), and the spacing between adjacent two first annular fins (12) is smaller than the spacing between adjacent two second annular fins (13).
5. A direct current liquid type marker according to claim 4, wherein: The middle part of the water reservoir (4) is sequentially and spacedly provided with a flow guide ring (14) for guiding the flow of ink and an adjusting ring (15) for reducing the flow resistance of ink from bottom to top, the first annular fin (12) is located between the flow guide ring (14) and the first matching ring (9), and the second annular fin (13) is located between the flow guide ring (14) and the adjusting ring (15).
6. A direct current liquid type marker according to claim 5, wherein: The flow guide ring (14) is provided with a first groove (21) for adjusting the pressure difference between the inside and outside of the water reservoir (4), and the first groove (21) is located between the first annular fin (12) and the second annular fin (13).
7. A direct current liquid type marker according to claim 6, wherein: A plurality of groups of second annular fins (13) are provided with a second groove (22), and the second groove (22) is recessed from the first groove (21) to the adjusting ring (15).
8. A direct current liquid marker according to claim 7, characterized in that: The water reservoir (4) is provided with a ventilation groove (16), the ventilation groove (16) is oppositely arranged with the first groove (21), and the ventilation groove (16) is penetratingly arranged from the top wall of the first matching ring (9) to the second annular fin (13).
9. A direct current liquid marker according to claim 8, characterized in that: The water reservoir (4) has a first connecting piece (17) protruding radially therefrom, the pen head sleeve (3) includes a second connecting piece (18) having an annular recess, a pen head piece (19) fitted on the second connecting piece (18), and the first connecting piece (17) is fitted in the second connecting piece (18).
10. A direct current liquid type marker according to claim 9, wherein: The second matching ring (10) is provided with a third groove (23), and the adjusting ring (15) is provided with a fourth groove (24), and the fourth groove (24) is oppositely arranged with the third groove (23).