A double-ended marker

Abstract

This application discloses a dual-ended marker pen, relating to the field of marker technology, comprising a pen barrel and a pen cap. The pen barrel includes a pen tube, a first direct-liquid pen assembly, and a second direct-liquid pen assembly. The pen tube has a central through-channel forming an accommodating space. The first direct-liquid pen assembly includes an ink cartridge holder, a reservoir, a direct-liquid pen tip holder, and a first direct-liquid pen refill, all assembled together. The ink cartridge holder is inserted into a corresponding port of the pen tube via a corresponding engaging structure. The first direct-liquid pen refill includes a first pen tip and a first ink inlet, both integrally formed. The second direct-liquid pen assembly includes an ink cartridge holder, a reservoir, a direct-liquid pen tip holder, and a second direct-liquid pen refill, all assembled together. The ink cartridge holder is inserted into a corresponding port of the pen tube via a corresponding engaging structure. The second direct-liquid pen refill includes a second pen tip and a second ink inlet that abut against each other. This application allows for writing in two styles, is convenient to use, and is easy to assemble and disassemble.

Description

Technical Field

[0001] This application relates to the field of marker technology, specifically to a double-ended marker. Background Technology

[0002] A marker pen, also known as a drawing pen, is a colored pen used for writing or drawing. It contains ink, which is volatile. It usually comes with a cap and is commonly used for designing items, advertising slogans, posters, or other artistic creations.

[0003] Traditional markers consist only of a writing tip and an ink cartridge. The smoothness of ink flow depends on the looseness of the writing tip, which can easily lead to problems such as ink flow that is too fast or too slow, resulting in poor writing uniformity. To overcome these shortcomings, direct-liquid markers have emerged on the market. These markers utilize the cooperation between the ink reservoir and the ink cartridge to stabilize the ink flow. Consequently, there are markers with an integrated writing and ink cartridge (such as CN206612365U) and markers with separate ink cartridges and pen tips (such as CN222875624U). When using markers with an integrated writing and ink cartridge, even when writing... Even if the pen is dropped or subjected to external force, the writing section and the ink reservoir will not separate, thus ensuring uninterrupted writing. However, to ensure sufficient ink flow, the writing section is usually less rigid and has a larger diameter, making it suitable for writing with thicker strokes. For markers with separate ink reservoirs and nibs, although there is a defect that the nib can easily pop out when dropped from a height, causing the nib and ink reservoir to separate and resulting in uninterrupted writing, the nib can be made of different materials than the ink reservoir. The nib can be made of a harder material, making it suitable for writing with finer strokes.

[0004] Furthermore, commonly used markers typically have only one writing tip. When two different types of markers are needed, they must be switched. To achieve both fine and dark line thicknesses and multiple colors, two sets of multi-color markers are required. This not only takes up considerable space, making storage and carrying inconvenient, but also increases the complexity of operation due to frequent switching. To address these issues, double-ended markers have appeared on the market. However, existing double-ended markers usually have identical double-ended structures, which cannot meet the needs of writing different line thicknesses. Moreover, their ink is usually stored directly inside the pen tube, which is prone to leakage when the pen tube is squeezed and broken, directly affecting the marker's function. Additionally, the pen tube cannot be quickly replaced for reuse. Utility Model Content

[0005] In view of this, this application provides a double-ended marker to solve the technical problems of existing markers that cannot meet the needs of two different thicknesses, are prone to unstable ink flow, and are easily affected by damage to the pen tube.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A double-ended marker includes a barrel and detachable caps that fit over both ends of the barrel. The barrel includes a pen tube, a first liquid pen assembly, and a second liquid pen assembly.

[0008] The pen tube has a central through channel forming an accommodating space;

[0009] The first liquid pen assembly includes a corresponding ink tube socket, a corresponding water reservoir, a corresponding liquid pen tip fixing component, and a first liquid pen refill, which are assembled together. The ink tube socket is inserted into the corresponding port of the pen tube component through a corresponding snap-fit ​​structure. The first liquid pen refill includes a first pen tip and a first ink core with an integrated structure.

[0010] The second direct-liquid pen assembly includes a corresponding ink tube holder, a corresponding water reservoir, a corresponding direct-liquid pen tip holder, and a second direct-liquid pen refill, all assembled together. The ink tube holder is inserted into the corresponding port of the pen tube assembly via a corresponding locking structure. The second direct-liquid pen refill includes a second pen tip and a second ink core that abut against each other.

[0011] Furthermore, the diameter of the first pen tip is larger than the diameter of the first water-conducting core, and the two are coaxially arranged. The first pen tip is interference-fitted with the inner hole of the corresponding straight liquid pen tip fixing component and abuts against the end face of the corresponding water reservoir. The first water-conducting core is inserted into the inner hole of the corresponding water reservoir.

[0012] Furthermore, the second pen tip has multiple slots on its circumferential surface, and the corresponding straight liquid pen tip fixing component has a locking block inside its inner hole that mates with the slots.

[0013] Furthermore, the inner hole of the water reservoir consists of a straight hole section, a guide cone hole, and a water inlet core hole. The water inlet core is cylindrical, and the end of the water inlet core near the water inlet core hole is cone-shaped and abuts against the corresponding end of the water inlet core hole. The water inlet core and the straight hole section are in clearance fit.

[0014] Furthermore, a water inlet is provided on the side wall of the guide cone hole near the water inlet core hole.

[0015] Furthermore, the inner wall of the guide cone hole is provided with multiple limiting protrusions distributed in a ring, which abut against the outer peripheral surface of the water core.

[0016] Furthermore, the ink tube holder has a retaining and limiting part in the liquid-containing cavity that cooperates with the water reservoir. One end of the straight-liquid pen tip fixing part is inserted into the ink tube holder and is connected to the ink tube holder and the water reservoir respectively through corresponding locking structures, thus restricting the water reservoir inside the ink tube holder. The pen cap is connected to the ink tube holder.

[0017] Furthermore, the pen tube has a limiting contact portion that mates with the ink cartridge holder.

[0018] Furthermore, the pen cap includes an outer shell and an inner shell that are fitted together. The inner wall of the outer shell has a retaining ring, and the inner shell has retaining teeth that engage with the retaining ring to achieve positioning and installation of the inner shell. The inner shell also has a sealing ring protrusion that engages with the direct liquid pen tip fixing component.

[0019] Furthermore, the engaging structure consists of two meshing protrusion structures, the axial cross-section of which is arc-shaped and protruding, and at least one of the protrusion structures is annular.

[0020] As can be seen from the above technical solution, the advantages of this utility model are:

[0021] 1. Given the structure of the first liquid pen component, it is mainly used for writing thick lines. Given the structure of the second liquid pen component, it can be used for writing thin lines. By integrating the two different functions of the liquid pen components into one marker, it can meet the two usage needs, reduce the number of pens used, make storage and carrying more convenient, and make it more convenient to use.

[0022] 2. The marker pen utilizes a snap-fit ​​mechanism between the direct-liquid pen tip holder and the ink cartridge / reservoir, resulting in a more stable overall structure. This stable structure ensures consistent ink flow, preventing uneven ink distribution or ink interruptions caused by loose components. Furthermore, the easy-to-disassemble design simplifies the assembly process, improving production efficiency.

[0023] 3. The ink cartridge holder allows for convenient and quick replacement of the entire direct-liquid pen assembly. Users can combine the pen cartridge with different direct-liquid pen assemblies according to their needs, improving the compatibility of the pen cartridge, extending the life of the marker, and reducing operating costs.

[0024] 3. Due to the reasonable design of the ink cartridge holder, direct-flow pen tip holder, and pen cap, the outer surface of this marker is flush with the rest of the pen, resulting in a smooth and aesthetically pleasing appearance. This design not only enhances the product's appearance but also avoids potential safety hazards caused by protruding components, making it safer to use.

[0025] 4. The pen cap of this application is manufactured in a split design, which reduces the processing difficulty, and the inner shell can be made in different colors for the convenience of users; the outer shell is the same color as the pen tube, which is simple and beautiful, and improves the versatility of the outer shell. At the same time, the sealing ring protrusion on the inner shell can effectively prevent ink evaporation and ensure writing quality. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0027] Figure 1 This is a three-dimensional structural diagram of this application.

[0028] Figure 2 This is a side view of the present application.

[0029] Figure 3 For the purposes of this application Figure 2 A cross-sectional view along the AA direction.

[0030] Figure 4 For the purposes of this application Figure 3 A magnified schematic diagram of the structure at point C.

[0031] Figure 5 This is a schematic diagram of the structure of the first direct liquid pen refill of this application.

[0032] Figure 6 For the purposes of this application Figure 3 Enlarged schematic diagram of the structure at point B in the diagram.

[0033] Figure 7 This is a schematic diagram of the structure of the second direct liquid pen refill of this application.

[0034] Figure 8 This is a schematic diagram of the pen cap structure of this application.

[0035] Figure 9 This is a schematic diagram of the water storage device of this application.

[0036] Explanation of reference numerals in the attached drawings: 1-Pen barrel; 11-Pen tube fitting; 111-Holding and limiting part; 12-Ink tube seat; 121-Tube seat shoulder; 13-Water reservoir; 131-Straight hole section; 132-Guide cone hole; 133-Limiting protrusion; 134-Inlet core hole; 135-Inlet side opening; 14-Straight ink pen tip fixing part; 141-Fixing part shoulder; 142-Clamping block; 15-First straight ink pen refill; 151-First pen tip; 152-First ink core; 16-Second straight ink pen refill; 161-Second pen tip; 1611-Clamping groove; 162-Second ink core; 17-Clamping structure; 2-Pen cap; 21-Outer shell; 211-Clamping ring; 22-Inner shell; 221-Clamping tooth; 222-Sealing ring protrusion. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and their descriptions are used to explain this application, but are not intended to limit it.

[0038] refer to Figures 1 to 9 ,like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a double-ended marker, including a pen barrel 1 and detachable pen caps 2 that cover both ends of the pen barrel 1. The use of pen caps 2 reduces ink evaporation and prevents the pen tip from accumulating dust and being affected by air oxidation. The pen barrel 1 includes a pen tube 11, a first liquid pen assembly, and a second liquid pen assembly. The pen tube 11 has a central through channel, forming an accommodating space for installing the first liquid pen assembly and the second liquid pen assembly.

[0039] In this application, the pen tube 11 is a hollow tube with two through ends, and its central through channel forms a receiving space. The first liquid pen assembly and the second liquid pen assembly are respectively inserted and connected to the left and right ports of the receiving space. The use of the pen tube 11 integrates the first liquid pen assembly and the second liquid pen assembly into one unit. At the same time, the pen tube 11 can play a certain protective role for the first liquid pen assembly and the second liquid pen assembly, making it less likely for ink to leak.

[0040] In this application, such as Figure 3 , Figure 4 and Figure 5 As shown, the first liquid pen assembly includes a corresponding ink cartridge holder 12, a corresponding water reservoir 13, a corresponding liquid pen tip holder 14, and a first liquid pen refill 15, all assembled together. The ink cartridge holder 12 is inserted into the corresponding port of the pen tube 11 via a corresponding locking structure 17, making the first liquid pen assembly easy to assemble and disassemble. The first liquid pen refill 15 includes a first pen tip 151 and a first ink inlet 152, both of which are integrally formed. Since the first pen tip 151 and the first ink inlet 152 never separate, the ink flow stability of the first liquid pen refill 15 is high. Because the first pen tip 151 and the first ink inlet 152 are made of the same material, in order to ensure stable ink flow, the density of the first ink inlet 152 should not be too high. Therefore, the first pen tip 151 is easily deformed during writing, making the lines thicker, thus meeting the needs of writing thick lines.

[0041] In this application, the diameter of the first pen tip 151 is larger than the diameter of the first ink core 152, and the two are coaxially arranged. The first pen tip 151 is interference-fitted with the inner hole of the corresponding direct-ink pen tip fixing member 14 and abuts against the end face of the corresponding ink reservoir 13. The first ink core 152 is inserted into the inner hole of the corresponding ink reservoir 13. The interference fit between the first pen tip 151 and the corresponding direct-ink pen tip fixing member 14 prevents the first direct-ink pen tip 15 from easily falling off. The increased diameter of the first pen tip 151 improves the smoothness of ink flow and also prevents the first ink core 152 from being excessively squeezed during writing, which affects the ink absorption efficiency and is conducive to stable ink output.

[0042] In this application, such as Figure 3 , Figure 6 and Figure 7 As shown, the second direct-liquid pen assembly includes a corresponding ink tube holder 12, a corresponding water reservoir 13, a corresponding direct-liquid pen tip holder 14, and a second direct-liquid pen refill 16, all assembled together. The ink tube holder 12 is also inserted into the corresponding port of the pen tube holder 11 via a corresponding locking structure 17, making the second direct-liquid pen assembly easy to assemble and disassemble. The second direct-liquid pen refill 16 includes a second pen tip 161 and a second ink inlet 162 that abut against each other. The second pen tip 161 and the second ink inlet 162 are separately configured, allowing the second pen tip 161 to be adapted to pen tips of different hardness to meet the needs of different thicknesses. The end of the second ink inlet 162 near the second pen tip 161 is tapered, and the second pen tip 161 has a tapered hole that matches it, improving the connection stability and contact area between the second ink inlet 162 and the second pen tip 161, ensuring stable and smooth ink flow.

[0043] In this application, the first liquid pen assembly and the second liquid pen assembly are two independent components. That is, the ink tube holder 12 of the first liquid pen assembly and the second liquid pen assembly have the same structure but are independent of each other, the water reservoir 13 of the first liquid pen assembly and the second liquid pen assembly have the same structure but are independent of each other, and the liquid pen tip fixing member 14 of the first liquid pen assembly and the second liquid pen assembly have the same structure but are independent of each other.

[0044] In this application, since the second pen tip 161 is short and easy to fall off, in order to improve the installation stability of the second pen tip 161, the second pen tip 161 has multiple slots 1611 on its circumferential surface, and the corresponding straight liquid pen tip fixing part 14 has a locking block 142 that cooperates with the slots 1611 in its inner hole.

[0045] In this application, when the first liquid pen assembly / second liquid pen assembly is assembled, the ink reservoir 12 has a retaining and limiting part 111 that cooperates with the water reservoir 13 to limit the inner end of the water reservoir 13. One end of the liquid pen tip fixing member 14 is inserted into the ink reservoir 12 and connected to the ink reservoir 12 and the water reservoir 13 respectively through corresponding engaging structures 17. The liquid pen tip fixing member 14 abuts against the water reservoir 13 to restrict the water reservoir 13 within the ink reservoir 12. The pen cap 2 is connected to the ink reservoir 12. This connection method makes the connection between the ink reservoir 12, the water reservoir 13 and the liquid pen tip fixing member 14 stable, making the entire structure stable, ensuring the contact stability of the second pen tip 161 and the second ink core 162, thereby ensuring good ink output stability, and making disassembly and assembly simple and convenient. The pen cap 2 is connected to the ink reservoir 12 to protect the pen tip.

[0046] In this application, to improve the connection stability between the ink cartridge holder 12 and the pen tube 11, the pen tube 11 has a limiting abutment portion that mates with the ink cartridge holder 12. This prevents the ink cartridge holder 12 from being excessively pressed into the pen tube 11.

[0047] Specifically, the limiting contact part is the end face of the pen tube 11, and the outer peripheral surface of the ink tube seat 12 has a tube seat shoulder 121 that can abut against the corresponding end face of the pen tube 11. The outer peripheral surface of the tube seat shoulder 121 is flush with the outer peripheral surface of the pen tube 11. The outer peripheral surface of the direct liquid pen tip fixing part 14 has a fixing shoulder 141 that can abut against the end face of the ink tube seat 12. The outer peripheral surface of the fixing shoulder 141 is flush with the outer peripheral surface of the ink tube seat 12. The outer peripheral surface of the pen cap 2 is flush with the outer peripheral surface of the pen tube 11. This design makes the marker pen smooth and beautiful in appearance, safe to use, and also helps to improve the overall quality of the product.

[0048] In this application, such as Figure 9 As shown, the inner hole of the water reservoir 13 consists of a straight hole section 131, a guide cone hole 132, and a water inlet core hole 134. The water inlet core is cylindrical, and the end of the water inlet core near the water inlet core hole 134 is cone-shaped and inserted into the corresponding port of the water inlet core hole 134, realizing automatic centering and positioning of the water inlet core. The water inlet core and the straight hole section 131 are in a clearance fit, so that the end of the water inlet core near the second pen tip 161 / first pen tip 151 is in an uncompressed state, ensuring a stable ink penetration rate, thereby ensuring the stability of ink output, and also reducing the installation cost of the water inlet core. The friction during installation makes the water core easy to install and less prone to breakage. The small end of the guide cone hole 132 is connected to the water core hole 134. The guide cone hole 132 enables the water core to automatically align during installation, making the installation process smooth and preventing the water core from bending and being damaged due to uneven force. Other structures of the water reservoir 13 can refer to the structures in the prior art, such as the water reservoir in CN220095991U and CN220447528U, where the water core is the first water core 152 / the second water core 162.

[0049] In this application, a water inlet 135 is provided on the side wall of the guide cone hole 132 near the water inlet core hole 134. The water inlet 135 works in conjunction with the water inlet core hole 134 to stabilize the ink absorption of the water inlet core by increasing the ink inlet diameter, thereby stabilizing the ink output.

[0050] To ensure stable installation of the water core, multiple circumferentially distributed limiting protrusions 133 are provided on the inner wall of the guide cone hole 132. The limiting protrusions 133 abut against the outer circumferential surface of the water core, and the contact friction is increased by the abutment of the limiting protrusions 133. When the marker is vibrated, the water core is not easy to jump.

[0051] In this application, such as Figure 8As shown, the pen cap 2 includes an outer shell 21 and an inner shell 22 that are fitted together. The bottom surface of the outer shell 21 has a through hole for the inner shell 22 to pass through. The inner wall of the outer shell 21 has a retaining ring 211, and the inner shell 22 has retaining teeth 221 that engage with the retaining ring 211 to achieve positioning and installation of the inner shell 22. The pen cap 2 is manufactured in two parts, which reduces the processing difficulty of the pen cap 2 and allows the inner shell 22 to be made in a corresponding color for user selection. The outer shell 21 is the same color as the pen tube 11, which is simple and aesthetically pleasing, and also improves the versatility of the outer shell 21.

[0052] In this application, the inner wall of the inner shell 22 has a sealing ring protrusion 222 that fits and cooperates with the outer peripheral surface of the direct liquid pen tip fixing member 14. After the pen cap 2 is closed, the outer exposed end of the first pen tip 151 / first pen tip 161 is in the sealed space. Therefore, the setting of the sealing ring protrusion 222 can effectively prevent ink evaporation and ensure the writing quality of the marker pen.

[0053] In this application, such as Figure 4 and Figure 6 As shown, the pen tube 11 and ink tube seat 12 are provided with mutually abutting limiting structures, the ink tube seat 12 and direct liquid pen tip fixing component 14 are provided with mutually abutting limiting structures, and the direct liquid pen tip fixing component 14 and water reservoir 13 are provided with mutually abutting limiting structures. The engaging structure 17 consists of two meshing protrusion structures. The axial cross-section of the protrusion structure is arc-shaped, and at least one protrusion structure is a continuous ring structure. This engaging structure design is reasonable, the connection is firm, and it can ensure a stable connection between the components.

[0054] In this application, one locking protrusion of the locking structure 17 is a continuous annular structure, and the other locking protrusion is a continuous annular structure or multiple locking protrusions distributed along an annular interval (e.g., Figure 8 ).

[0055] The engaging structure 17 is provided on the mating surface of the shaft and the sleeve. The engaging structure 17 between the pen tube 11 and the ink tube seat 12 will be specifically described. One engaging protrusion of the engaging structure 17 is provided on the inner wall of the pen tube 11, and the other engaging protrusion of the engaging structure 17 is provided on the outer peripheral surface of the ink tube seat 12.

[0056] This marker effectively solves many problems existing in current markers while meeting the needs of writing with different thicknesses. It has the advantages of stable structure, stable ink flow, and convenient storage and carrying.

[0057] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to the embodiments of this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A double-ended marker pen comprising a pen barrel (1) and detachable caps (2) which cap the two ends of the pen barrel (1), characterised in that, The pen barrel (1) includes a pen tube (11), a first liquid pen assembly, and a second liquid pen assembly, wherein, The pen tube (11) has a central through channel forming an accommodating space; The first direct liquid pen assembly includes a corresponding ink tube holder (12), a corresponding water reservoir (13), a corresponding direct liquid pen tip fixing component (14), and a first direct liquid pen refill (15) assembled together. The ink tube holder (12) is inserted into the corresponding port of the pen tube component (11) through a corresponding locking structure (17). The first direct liquid pen refill (15) includes a first pen tip (151) and a first ink core (152) with an integrated structure. The second direct liquid pen assembly includes a corresponding ink tube holder (12), a corresponding water reservoir (13), a corresponding direct liquid pen tip fixing component (14), and a second direct liquid pen refill (16) assembled together. The ink tube holder (12) is inserted into the corresponding port of the pen tube component (11) through a corresponding locking structure (17). The second direct liquid pen refill (16) includes a second pen tip (161) and a second ink core (162) that abut against each other.

2. The double-ended marker of claim 1, wherein The diameter of the first pen tip (151) is larger than the diameter of the first water inlet core (152) and the two are coaxially arranged. The first pen tip (151) is interference-fitted with the inner hole of the corresponding straight liquid pen tip fixing member (14) and abuts against the end face of the corresponding water reservoir (13). The first water inlet core (152) is inserted into the inner hole of the corresponding water reservoir (13).

3. The dual tip marker pen of claim 1, wherein, The second pen tip (161) has multiple slots (1611) on its circumferential surface, and the corresponding straight liquid pen tip fixing member (14) has a locking block (142) that cooperates with the slots (1611) in its inner hole.

4. The dual tip marker pen of claim 1, wherein The inner hole of the water reservoir (13) is composed of a straight hole section (131), a guide cone hole (132) and a water inlet core hole (134). The water inlet core is cylindrical, and the end of the water inlet core near the water inlet core hole (134) is cone-shaped and abuts against the corresponding end of the water inlet core hole (134). The water inlet core and the straight hole section (131) are in clearance fit.

5. The double-ended marker of claim 4, wherein, A water inlet (135) is provided on the side wall of the guide cone hole (132) near the water inlet core hole (134).

6. The dual tip marker pen of claim 4, wherein, The inner wall of the guide cone hole (132) is provided with a plurality of limiting protrusions (133) distributed in a ring, and the limiting protrusions (133) abut against the outer peripheral surface of the water core.

7. The dual tip marker pen of claim 1, wherein The ink tube holder (12) has a retaining and limiting part (111) that cooperates with the water reservoir (13) in the liquid chamber. One end of the straight liquid pen tip fixing member (14) is inserted into the ink tube holder (12) and is connected to the ink tube holder (12) and the water reservoir (13) respectively through the corresponding locking structure (17), thereby restricting the water reservoir (13) in the ink tube holder (12).

8. The dual tip marker pen of claim 1, wherein The pen tube (11) has a limiting abutment portion that cooperates with the ink tube seat (12).

9. The dual tip marker pen of claim 1, wherein The pen cap (2) includes an outer shell (21) and an inner shell (22) that are fitted together. The inner wall of the outer shell (21) has a retaining ring (211). The inner shell (22) has a retaining tooth (221) that engages with the retaining ring (211) to achieve the positioning and installation of the inner shell (22). The inner shell (22) has a sealing ring protrusion (222) that engages with the straight liquid pen tip fixing member (14).

10. The dual tip marker pen of claim 1, wherein The engaging structure (17) consists of two meshing protrusion structures. The axial cross-section of the protrusion structure is a circular arc protrusion, and at least one protrusion structure is a ring structure.

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