Dual color ink pen with easy assembly

Abstract

The application relates to the technical field of stationery, in particular to a two-color ink pen convenient to assemble, which comprises a pen barrel, a partition piece arranged in the inner cavity of the pen barrel and two ink cores, the ink core comprises an ink core, the ink core comprises an ink tube and a sponge core arranged in the inner cavity of the ink tube, two axial end faces of the partition piece are each provided with a guide block, the guide block is used for inserting the sponge core, a guide surface slidingly abutting against the axial end face of the ink tube is formed on the surface of the guide block away from the central axis of the partition piece, and the distance between the guide surface and the central axis of the partition piece decreases in the direction of the guide block inserting the sponge core. The application avoids the hard collision or dislocation between the end face of the ink core and the partition piece, thereby significantly improving the installation convenience and assembly quality of the ink core, and reducing the risk of ink color mixing or ink core damage caused by improper assembly.

Description

Technical Field

[0001] This application relates to the field of stationery, and in particular to a two-color ink pen that is easy to assemble. Background Technology

[0002] A two-color ink pen is a pen that contains two different colors of ink. It is one of the most common and versatile multicolor pens. Two-color ink pens include double-ended two-color pens, which have a fixed nib at each end with two different colors, like two pens glued together. They are commonly found in highlighters, markers, or fiber optic pens.

[0003] In related technologies, a dual-ended dual-color ink pen includes a pen barrel, two ink cartridges, two pen tips respectively mounted on opposite ends of the two ink cartridges, and a separator. The ink cartridges include ink cores for storing ink, and the separator separates the two ink cores to prevent ink mixing. In related technologies, the separator is generally cylindrical, with receiving grooves on both axial end faces to accommodate the ends of the ink cores, thus making the axial cross-section of the separator I-shaped. When installing the ink cartridges and separator, one ink cartridge must first be inserted into the pen barrel, then the separator into the pen barrel, and finally the other ink cartridge into the pen barrel.

[0004] However, because the radial dimension of the ink core is smaller than the radial dimension of the inner wall of the pen barrel, during actual assembly, after the ink core is inserted into the pen barrel, it is easy for the ink core to tilt due to the size difference and come into contact with the inner wall of the pen barrel. This causes the end of the ink core to come into contact with the opening surface of the receiving groove of the separator when it is inserted, making it difficult for the ink core to be inserted into the receiving groove of the separator. Ultimately, this affects the assembly quality of the ink core and may even affect the quality of use of the two-color ink pen. Utility Model Content

[0005] To improve the ease of pen refill installation and assembly quality, this application provides a two-color ink pen that is easy to assemble.

[0006] This application provides a conveniently assembled two-color ink pen, which adopts the following technical solution: A conveniently assembled dual-color ink pen includes a pen barrel, an isolator disposed in the inner cavity of the pen barrel, and two pen refills. Each pen refill includes an ink core, which includes an ink tube and a sponge core disposed in the inner cavity of the ink tube. Guide blocks are provided on both axial end faces of the isolator. The guide blocks are used to insert the sponge core. A guide surface is formed on the surface of the guide block away from the central axis of the isolator, which slides against the axial end face of the ink tube. The distance between the guide surface and the central axis of the isolator decreases along the direction in which the guide block is inserted into the sponge core.

[0007] By adopting the above technical solution, when installing the ink cartridge, first insert one ink cartridge into the inner cavity of the pen barrel, then insert the spacer. The guide block on the spacer is inserted into the sponge core. During the process of the spacer squeezing the sponge core, the guide surface slides against the axial end face of the ink tube, thereby automatically correcting the ink cartridge during the installation of the spacer and ensuring that the final shape of the ink cartridge is not tilted. The spacer with the guide block and the inclined guide surface on the guide block allow the sponge core of the ink cartridge to be smoothly guided into the spacer during assembly, avoiding hard collisions or misalignment between the end face of the ink cartridge and the spacer. This significantly improves the ease of installation and assembly quality of the pen cartridge, while reducing the risk of ink mixing or pen cartridge damage due to improper assembly.

[0008] Optionally, the two axial end faces of the isolation member are provided with receiving grooves for the axial ends of the two ink cores to be inserted, the guide block is provided on the bottom wall of the receiving groove, and the end of the guide surface away from the bottom wall of the receiving groove extends out of the receiving groove.

[0009] By adopting the above technical solution, receiving grooves are set at both ends of the isolation component for the axial end of the ink core to be inserted. This reduces the space occupied by the isolation component in the axial direction of the pen barrel. The guide block is set at the bottom of the groove and the guide surface extends out of the groove, which can effectively guide the ink core. When the ink core is inserted, it is first initially guided by the guide surface and then smoothly enters the receiving groove, which further improves the accuracy of guidance and the smoothness of assembly, and avoids the ink core from deflecting or getting stuck during the insertion process. In addition, the groove wall of the receiving groove can play a certain limiting role in the final shape of the ink core.

[0010] Optionally, the guide surface is arranged around the central axis of the isolator.

[0011] By adopting the above technical solution, the guide surface is arranged around the central axis of the isolation component, so that the guiding effect is evenly distributed in the circumferential direction. Regardless of the position of the ink core in the rotation direction, a consistent guiding effect can be obtained, which enhances the reliability and adaptability of the assembly.

[0012] Optionally, multiple guide blocks are provided, and each guide block is arranged around the central axis of the isolator.

[0013] By adopting the above technical solution, multiple guide blocks arranged around the axis are set to form a multi-point guiding structure, which can jointly straighten and guide the ink core, effectively preventing the ink core from tilting or shifting during insertion, improving the stability and centering accuracy of the assembly. Moreover, setting multiple guide blocks can reduce the material used for guide blocks and lower production costs compared to setting the guide block as a single cone or frustum.

[0014] Optionally, there is a distance between the surface of the guide block near the central axis of the isolator and the central axis of the isolator.

[0015] By adopting the above technical solution, the surface of the guide block near the axis maintains a certain distance from the axis. With a fixed inclination angle of the guide surface, the length of the guide block (the dimension of the guide block in the axial direction of the pen barrel) can be minimized. This prevents ink from being squeezed out and wasted due to excessive insertion of the guide block into the sponge core, and also minimizes damage to the sponge core. Maintaining a certain distance between the surface of the guide block near the axis and the axis makes it easier to insert the guide block into the sponge core compared to a frustum, resulting in less effort during operation.

[0016] Optionally, the surface of the guide block near the central axis of the isolator is the inner surface, the inner surface is inclined, and the distance between the inner surface and the central axis of the isolator increases along the direction in which the guide block is inserted into the sponge core.

[0017] By adopting the above technical solution, the inner surface of the guide block is set as an inclined surface, and the distance between the inclined surface and the axis increases with the insertion direction. This allows the guide block to play a certain role in expansion or centering while guiding the ink core insertion, further optimizing the guiding effect, improving the accuracy and efficiency of assembly, and making the initial pressure of the guide block when inserting into the sponge core smaller, making the operation more labor-saving, and reducing the amount of material used while ensuring the structural strength of the guide block.

[0018] Optionally, the surface of the guide block near the adjacent guide block is a side surface, which is inclined, and the distance between the two sides of the guide block decreases along the direction in which the guide block is inserted into the sponge core.

[0019] By adopting the above technical solution, the side of the guide block is set as an inclined surface, and the distance between the two sides decreases with the insertion direction to form a tapered structure. This allows the guide block to gradually tighten when inserted into the sponge core, enhancing the gripping and guiding effect on the ink core, improving the accuracy and efficiency of assembly, and making the initial pressure of the guide block when inserted into the sponge core smaller, making the operation more labor-saving, and reducing the amount of material used while ensuring the structural strength of the guide block.

[0020] Optionally, multiple guide blocks are provided, each guide block is arranged around the central axis of the isolation member, the surface of the guide block away from the central axis of the isolation member is in contact with the side wall of the receiving groove, and the end of the guide block away from the central axis of the isolation member is located in the receiving groove and there is a distance between it and the opening surface of the receiving groove.

[0021] By adopting the above technical solution, the guide block fits snugly against the side wall of the receiving groove and its end does not protrude from the groove opening. This not only ensures the stability of the guide block in the groove and improves the structural strength of the guide block, but also allows the groove wall of the receiving groove to limit the shaft end of the ink core. This further optimizes the fit between the guide structure and the receiving groove, and improves the smoothness and reliability of the assembly.

[0022] Optionally, the circumferential sidewall of the isolation member is provided with a locking block, and the inner cavity of the pen barrel includes a connected large-diameter section and a small-diameter section, and the locking block is used to abut against the opening surface of the small-diameter section near the large-diameter section.

[0023] By adopting the above technical solution, a locking block is set on the isolation component, which abuts against the small-diameter opening surface in the inner cavity of the pen barrel. This achieves accurate positioning and fixation of the isolation component in the pen barrel, preventing it from moving during assembly or use, and ensuring the stability of the overall structure and effective isolation between the ink cores.

[0024] Optionally, the inner wall of the pen barrel is provided with a plurality of positioning blocks arranged around the central axis of the pen barrel. The surface of the positioning block near the central axis of the pen barrel is used to abut against the circumferential side wall of the ink tube. The surface of the positioning block near the central axis of the pen barrel is formed with a guide surface for sliding abutting against the axial end face of the ink tube. The distance between the guide surface and the central axis of the pen barrel decreases along the direction in which the ink core is inserted into the pen barrel.

[0025] By adopting the above technical solution, a positioning block with a guide surface is set on the inner wall of the pen barrel, so that the ink core can be initially guided and aligned when it is inserted into the pen barrel, creating conditions for its subsequent docking with the isolation component. Overall, the assembly efficiency and consistency of the two-color ink pen are improved, and the quality risks caused by poor assembly are reduced.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. This avoids hard collisions or misalignment between the ink cartridge end face and the separator, thus significantly improving the ease of pen cartridge installation and assembly quality, while reducing the risk of ink mixing or pen cartridge damage due to improper assembly. 2. The guide block forms a tapered structure, which improves the accuracy and efficiency of assembly, makes operation more labor-saving, and reduces material usage while ensuring the structural strength of the guide block. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this application.

[0028] Figure 2 This is a cross-sectional view of the pen body along the axial direction of the present application.

[0029] Figure 3 This is a schematic diagram of the structure of the isolation component in this application.

[0030] Figure 4 This is a structural schematic diagram of the main body of the pen barrel in this application.

[0031] Figure 5 This is the front view of the isolation element in this application.

[0032] Figure 6This is a side view of the isolation component in this application.

[0033] Figure 7 yes Figure 2 Enlarged view of point A in the middle.

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

[0035] Explanation of reference numerals in the attached drawings: 1. Pen barrel; 11. Large diameter section; 12. Small diameter section; 13. Pen barrel body; 14. Pen tip limiting component; 2. Isolation component; 21. Receiving groove; 3. Pen refill; 31. Ink core; 311. Ink tube; 312. Sponge core; 32. Pen tip; 4. Guide block; 41. Guide surface; 42. Inner surface; 43. Side; 5. Locking block; 6. Positioning block; 61. Guide surface; 7. Limiting block; 8. Pen cap. Detailed Implementation

[0036] The following combination Figures 1-8 This application will be described in further detail.

[0037] This application discloses a conveniently assembled two-color ink pen. (Refer to...) Figure 1 and Figure 2 The easy-to-assemble dual-color ink pen includes a pen barrel 1, a separator 2 installed in the inner cavity of the pen barrel 1, and two ink cartridges 3. The pen barrel 1 includes a pen barrel body 13. The separator 2 is used to separate the two ink cartridges 3. The ink cartridge 3 includes an ink core 31, which includes an ink tube 311 and a sponge core 312 installed in the inner cavity of the ink tube 311.

[0038] Reference Figure 2 and Figure 3 Guide blocks 4 are integrally formed on both axial end faces of the isolation member 2. The guide blocks 4 are used to insert the sponge core 312. A guide surface 41 is formed on the surface of the guide block 4 away from the central axis of the isolation member 2, which slides against the axial end face of the ink tube 311. The distance between the guide surface 41 and the central axis of the isolation member 2 decreases along the direction in which the guide block 4 is inserted into the sponge core 312.

[0039] Reference Figure 2 and Figure 4 Multiple positioning blocks 6 are integrally formed on the inner wall of the pen body 13, arranged around the central axis of the pen body 13. Each positioning block 6 surrounds a slot for the end of the ink core 31 to be inserted. A limiting block 7 is also integrally formed on the surface of the positioning block 6 near the central axis of the pen body 13. The limiting block 7 is used to abut against the axial end face of the ink core 31, thereby limiting the ink core 31 in the axial direction of the pen body 13. The surface of the positioning block 6 near the central axis of the pen body 13 is used to abut against the circumferential side wall of the ink tube 311, thereby limiting the ink core 31 in the radial direction of the pen body 13.

[0040] Reference Figure 2 and Figure 4 An inclined guide surface 61 is formed on the end of the positioning block 6 near the central axis of the pen body 13, away from the limiting block 7. The guide surface 61 is used to slide against the axial end face of the ink tube 311. The distance between the guide surface 61 and the central axis of the pen body 13 decreases along the direction in which the ink core 31 is inserted into the pen body 13.

[0041] Reference Figure 2 and Figure 3 The two axial end faces of the separator 2 are each provided with a receiving groove 21 for inserting the axial ends of the two ink cores 31. The guide block 4 is integrally formed on the bottom wall of the receiving groove 21. The end of the guide surface 41 away from the bottom wall of the receiving groove 21 extends out of the receiving groove 21. In other embodiments, the receiving groove 21 may not be provided.

[0042] Reference Figure 3 Multiple guide blocks 4 are provided, and each guide block 4 is arranged around the central axis of the isolation member 2. The guide surface 41 on each guide block 4 is also arranged around the central axis of the isolation member 2. In other embodiments, only one guide block 4 may be provided, and the guide block 4 is not a rotating body. In other embodiments, only one guide block 4 may be provided, and the guide block 4 is a rotating body, such as a cone or frustum, and the guide surface 41 is the circumferential sidewall of the guide block 4.

[0043] Reference Figure 3 The guide block 4 is a hexahedron. There is a distance between the surface of the guide block 4 near the central axis of the spacer 2 and the central axis of the spacer 2. In other embodiments, the guide block 4 can be a pentahedron, with each guide block 4 sharing a common edge line that coincides with the central axis of the spacer 2.

[0044] Reference Figure 2 and Figure 5 and Figure 6 The surface of the guide block 4 near the central axis of the spacer 2 is the inner surface 42, which is inclined. The distance between the inner surface 42 and the central axis of the spacer 2 increases along the direction in which the guide block 4 is inserted into the sponge core 312. In other embodiments, the inner surface 42 may extend along the axial direction of the spacer 2.

[0045] Reference Figure 2 and Figure 5 and Figure 6 The surface of the guide block 4 closest to the adjacent guide block 4 is a side surface 43, and each guide block 4 includes two side surfaces 43. The side surfaces 43 are inclined, and the distance between the two side surfaces 43 on the guide block 4 decreases along the direction in which the guide block 4 is inserted into the sponge core 312. In other embodiments, the side surfaces 43 may extend along the axial direction of the spacer 2.

[0046] Reference Figure 3 The surface of the guide block 4 away from the central axis of the isolator 2 is integrally formed on the sidewall of the receiving groove 21. The end of the guide block 4 away from the central axis of the isolator 2 is located inside the receiving groove 21 and is at a distance from the opening surface of the receiving groove 21. In other embodiments, the end of the guide block 4 away from the central axis of the isolator 2 may be flush with or extend beyond the opening surface of the receiving groove 21.

[0047] Reference Figure 6 and Figure 7 A locking block 5 is integrally formed on the circumferential sidewall of the isolator 2, and the locking block 5 is annular. The inner cavity of the pen body 13 includes a large-diameter section 11 and a small-diameter section 12, which are connected by an inclined tube wall. The locking block 5 abuts against the inclined tube wall, thereby limiting the locking block 5 in the axial direction of the isolator 2. In other embodiments, the inclined tube wall may not be provided, and the locking block 5 abuts against the opening surface of the small-diameter section 12 near the large-diameter section 11.

[0048] Reference Figure 4 and Figure 8 The pen barrel 1 also includes two pen tip limiting members 14, one of which is integrally formed on one end of the pen barrel body 13, and the other pen tip limiting member 14 is detachably installed on the other end of the pen barrel body 13.

[0049] Reference Figure 2 and Figure 8 The pen refill 3 also includes a pen tip 32, one end of which is inserted into the sponge core 312, and the other end protrudes through the pen tip retainer 14. The pen tip retainer 14 is used to limit the pen tip 32. The ink core 31 is inserted into the inner cavity of the pen body 13 from the end of the pen body 13 away from the integrally formed pen tip retainer 14.

[0050] Reference Figure 1 and Figure 8 The conveniently assembled dual-color ink pen also includes two pen caps 8 that correspond one-to-one with the pen tip 32. The pen caps 8 are detachably mounted on the pen body 13 and are used to cover the pen tip limiting member 14 and the pen tip 32.

[0051] The installation principle of a conveniently assembled dual-color ink pen according to an embodiment of this application is as follows: First, one ink cartridge 31 is installed into the inner cavity of the pen body 13. The axial end of the ink tube 311 slides against the guide surface 61. Finally, the axial sidewall of the axial end of the ink tube 311 fits against the positioning block 6, and the axial end face of the ink tube 311 abuts against the limiting block 7, completing the installation of the ink cartridge 31. Next, the spacer 2 is installed into the inner cavity of the pen body 13. The circumferential sidewall of the spacer 2 moves along the large diameter section 11 of the pen body 13. The guide block 4 is inserted into the sponge core 312, and the guide surface 41 slides against the axial end face of the ink tube 311, thereby centering and correcting the ink tube 311 until the locking block 5 abuts against the opening surface of the small diameter section 12 near the large diameter section 11, completing the installation of the spacer 2. Then, another ink cartridge 31 is installed into the inner cavity of the pen body 13, followed by the installation of the pen tip 32 and the pen tip limiting member 14. Finally, install the pen cap (8).

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A conveniently assembled two-color ink pen, characterized in that: The pen includes a pen barrel (1), an isolator (2) disposed in the inner cavity of the pen barrel (1), and two pen refills (3). The pen refills (3) include an ink core (31), which includes an ink tube (311) and a sponge core (312) disposed in the inner cavity of the ink tube (311). The isolator (2) has guide blocks (4) on both axial end faces. The guide blocks (4) are used to insert the sponge core (312). The guide surface (4) on the surface of the guide block (4) away from the central axis of the isolator (2) is formed with a guide surface (41) that slides against the axial end face of the ink tube (311). The distance between the guide surface (41) and the central axis of the isolator (2) decreases along the direction in which the guide block (4) is inserted into the sponge core (312).

2. The conveniently assembled dual-color ink pen according to claim 1, characterized in that: The two axial end faces of the isolation member (2) are provided with receiving grooves (21) for the axial ends of the two ink cores (31) to be inserted respectively. The guide block (4) is provided on the bottom wall of the receiving groove (21), and the end of the guide surface (41) away from the bottom wall of the receiving groove (21) extends out of the receiving groove (21).

3. The conveniently assembled dual-color ink pen according to claim 1, characterized in that: The guide surface (41) is arranged around the central axis of the isolation member (2).

4. A conveniently assembled dual-color ink pen according to claim 3, characterized in that: The guide block (4) is provided in multiple ways, and each guide block (4) is arranged around the central axis of the isolation member (2).

5. A conveniently assembled dual-color ink pen according to claim 4, characterized in that: There is a distance between the surface of the guide block (4) near the central axis of the isolator (2) and the central axis of the isolator (2).

6. A conveniently assembled dual-color ink pen according to claim 4, characterized in that: The surface of the guide block (4) near the central axis of the isolation member (2) is the inner surface (42), the inner surface (42) is inclined, and the distance between the inner surface (42) and the central axis of the isolation member (2) increases along the direction in which the guide block (4) is inserted into the sponge core (312).

7. A conveniently assembled dual-color ink pen according to claim 4, characterized in that: The surface of the guide block (4) near the adjacent guide block (4) is a side (43), the side (43) is inclined, and the distance between the two side (43) on the guide block (4) decreases along the direction in which the guide block (4) is inserted into the sponge core (312).

8. A conveniently assembled dual-color ink pen according to claim 2, characterized in that: The guide block (4) is provided in multiple ways. Each guide block (4) is arranged around the central axis of the isolation member (2). The surface of the guide block (4) away from the central axis of the isolation member (2) is in contact with the side wall of the receiving groove (21). The end of the guide block (4) away from the central axis of the isolation member (2) is located in the receiving groove (21) and there is a distance between it and the opening surface of the receiving groove (21).

9. A conveniently assembled dual-color ink pen according to claim 1, characterized in that: The circumferential sidewall of the isolation member (2) is provided with a locking block (5). The inner cavity of the pen barrel (1) includes a large diameter section (11) and a small diameter section (12) connected to each other. The locking block (5) is used to abut against the opening surface of the small diameter section (12) near the large diameter section (11).

10. A conveniently assembled dual-color ink pen according to claim 1, characterized in that: The inner wall of the pen (1) is provided with a plurality of positioning blocks (6) arranged around the central axis of the pen (1). The surface of the positioning block (6) near the central axis of the pen (1) is used to abut against the circumferential side wall of the ink tube (311). The surface of the positioning block (6) near the central axis of the pen (1) is formed with a guide surface (61) for sliding abutting against the axial end face of the ink tube (311). The distance between the guide surface (61) and the central axis of the pen (1) decreases along the direction in which the ink core (31) is inserted into the pen (1).

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